CN111033804B - Power storage module and battery pack - Google Patents
Power storage module and battery pack Download PDFInfo
- Publication number
- CN111033804B CN111033804B CN201780094078.6A CN201780094078A CN111033804B CN 111033804 B CN111033804 B CN 111033804B CN 201780094078 A CN201780094078 A CN 201780094078A CN 111033804 B CN111033804 B CN 111033804B
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- positive electrode
- external terminal
- negative electrode
- bus bar
- exterior
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/562—Terminals characterised by the material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to an electricity storage module and a battery pack. According to an embodiment, a battery is provided that includes a flat electrode group (2), an exterior member (1), and terminal portions (3, 4). In the exterior member (1), the electrode group (2) is housed in a space formed by welding the flange portion (5b) of the 1 st exterior portion (5) and the 2 nd exterior portion (6). The terminal portions (3, 4) include external terminals (14) having head portions (17) and shaft portions (18). The head part (17) of the external terminal (14) protrudes outward from the 1 st external part (5), and the shaft part (18) is fixed by caulking to the through hole (13) of the 1 st external part (5). A bus bar (200) is fixed to the head of the external terminal (14).
Description
Technical Field
Embodiments of the present invention relate to an electricity storage module and a battery pack.
Background
Batteries such as primary batteries and secondary batteries generally include: an electrode group provided with a positive electrode and a negative electrode; an exterior member that houses the electrode group; and a positive electrode terminal and a negative electrode terminal provided on the exterior member.
As exterior members, metal cans and laminate film containers have been put into practical use. The metal can is obtained by deep drawing a metal plate such as aluminum. In order to manufacture a can by deep drawing, the metal plate needs to have a certain thickness, which hinders the thinning of the exterior member and causes a loss in volume capacity. For example, when an outer can having a thickness of 0.5mm is applied to a battery having a thickness of 13mm, the ratio of the total thickness of the outer can to the thickness of the battery is about 7.7%. Further, since the outer can has high rigidity and lacks flexibility, a gap is likely to be formed between the inner wall of the outer can and the electrode group. Therefore, a gap may be formed between the positive electrode and the negative electrode of the electrode group, and charge/discharge cycle performance may be deteriorated. Further, when an excessive force is applied to the vicinity of the welded portion, the outer can having high rigidity is likely to have defects such as cracks.
In order to eliminate the above problem, it is being studied to reduce the thickness of the metal can.
However, when the thickness of the metal can is reduced, the metal can is easily deformed by a force applied to the metal can at the time of welding when a member such as a bus bar is welded to the positive electrode terminal or the negative electrode terminal. As a result, the position of the member relative to the positive electrode terminal or the negative electrode terminal is displaced, and it is difficult to weld the member at a predetermined position of the positive electrode terminal and the negative electrode terminal.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2011-233492
Patent document 2: japanese patent laid-open publication No. 2012-252811
Disclosure of Invention
Problems to be solved by the invention
The present invention addresses the problem of providing a power storage module and a battery pack having excellent reliability.
Means for solving the problems
According to an embodiment, there is provided an electricity storage module including a flat electrode group, an exterior member, a terminal portion, and a 1 st insulating member. The electrode group comprises a positive electrode, a positive electrode collector sheet electrically connected with the positive electrode, a negative electrode and a negative electrode collector sheet electrically connected with the negative electrode. The positive electrode collector sheet wound in a flat shape is located on the 1 st end face of the electrode group. The negative electrode collector sheet wound in a flat shape is located on the 2 nd end surface of the electrode group. The exterior member includes a 1 st exterior portion made of stainless steel having a bottomed square tube shape and a flange portion at an opening portion, and a 2 nd exterior portion made of stainless steel. In the exterior member, the electrode group is housed in a space formed by welding the flange portion of the 1 st exterior portion and the 2 nd exterior portion. The 1 st end surface and the 2 nd end surface of the electrode group face the inner surface of the side wall of the 1 st exterior portion. The terminal portion includes a through hole opened in a side wall of the 1 st external mounting portion. Further, the terminal portion includes an external terminal including a head portion and a shaft portion protruding from the head portion. The external terminal is electrically connected to the positive electrode or the negative electrode, the head portion protrudes outward from the 1 st exterior portion, and the shaft portion is caulked and fixed to the through hole of the 1 st exterior portion. The head portion of the external terminal is provided with a tapered portion. The bus bar is fixed to the tapered portion.
Further, according to an embodiment, there is provided a battery pack including at least the power storage module of one embodiment.
Drawings
Fig. 1 is a schematic perspective view of a battery of a power storage module according to embodiment 1.
Fig. 2 is an enlarged perspective view of the vicinity of the positive terminal portion of the battery shown in fig. 1.
Fig. 3 is a plan view of the 2 nd exterior portion.
Fig. 4 is a plan view of the 1 st exterior part.
Fig. 5 is a perspective view of an electrode assembly of the battery shown in fig. 1.
Fig. 6 is a perspective view showing a state where the electrode group is partially developed.
Fig. 7 is a perspective view showing the vicinity of the external terminal of the power storage module in which the bus bar is attached to the external terminal of the battery shown in fig. 1.
Fig. 8 is a cross-sectional view of the power storage module shown in fig. 7 taken along the line VIII-VIII.
Fig. 9 is a perspective view illustrating a process of attaching a bus bar to an external terminal of the battery shown in fig. 1.
Fig. 10 is a cross-sectional view showing the vicinity of the positive electrode terminal portion after the power storage module shown in fig. 7 is cut in the longitudinal direction.
Fig. 11 is a perspective view showing another example of the external terminals of the battery of the power storage module according to the embodiment.
Fig. 12 is a perspective view showing the vicinity of an external terminal of an example of the power storage module in which a bus bar is fixed to the external terminal of the battery shown in fig. 11.
Fig. 13 is a cross-sectional view of the vicinity of the external terminal of the power storage module shown in fig. 12, taken along line XIII-XIII.
Fig. 14 is a perspective view showing the vicinity of an external terminal of another example of the power storage module in which a bus bar is fixed to the external terminal of the battery shown in fig. 11.
Fig. 15 is a perspective view showing the power storage module of fig. 14 in a state in which the vicinity of the positive electrode external terminal is cut along the longitudinal direction of the battery.
Fig. 16 is a perspective view showing the vicinity of an external terminal of another example of the power storage module in which a bus bar is fixed to the external terminal of the battery shown in fig. 11.
Fig. 17 is a perspective view showing an example of a battery pack of the battery pack according to embodiment 2.
Fig. 18 is a perspective view showing the vicinity of one short-side surface of the assembled battery shown in fig. 17.
Fig. 19 is a perspective view of the battery pack shown in fig. 17 viewed from the other short-side.
Fig. 20 is an enlarged perspective view of the vicinity of the other short-side surface of the battery pack shown in fig. 19.
Fig. 21 is a perspective view showing another example of a battery pack of the battery pack according to embodiment 2.
Fig. 22 is a perspective view showing the vicinity of one short-side surface of the assembled battery shown in fig. 21.
Fig. 23 is a perspective view of the battery pack shown in fig. 21 viewed from the other short-side.
Fig. 24 is an enlarged perspective view of the vicinity of the other short-side surface of the assembled battery shown in fig. 23.
Fig. 25 is a perspective view showing the vicinity of an external terminal of an example of the power storage module according to embodiment 3.
Fig. 26 is a cross-sectional view of the power storage module shown in fig. 25 taken along the longitudinal direction.
Fig. 27 is a perspective view of the assembled battery of the power storage module according to embodiment 3 as viewed from one short side.
Fig. 28 is an enlarged perspective view of the vicinity of one short-side surface of the assembled battery shown in fig. 27.
Fig. 29 is a perspective view of the battery pack shown in fig. 27 viewed from the other short side.
Fig. 30 is an enlarged perspective view of the vicinity of the other short-side surface of the battery pack shown in fig. 29.
Fig. 31 is a perspective view of another example of the assembled battery of the power storage module according to embodiment 3 viewed from one short side.
Fig. 32 is an enlarged perspective view of the vicinity of one short-side surface of the assembled battery shown in fig. 31.
Fig. 33 is a perspective view of the battery pack shown in fig. 31, as viewed from the other short side.
Fig. 34 is an enlarged perspective view of the vicinity of the other short-side surface of the battery pack shown in fig. 31.
Detailed Description
Hereinafter, embodiments will be described with reference to the drawings. In addition, the same reference numerals are given to the common components in the embodiments, and redundant description is omitted. The drawings are schematic views for explaining the embodiments and facilitating understanding thereof, and the shapes, dimensions, proportions, and the like thereof are different from those of actual devices, and these can be appropriately changed in design with reference to the following description and known techniques.
[ 1 st embodiment ]
According to embodiment 1, there is provided a battery including a flat electrode group, an exterior member, and a terminal portion. The flat electrode group includes a positive electrode, a positive electrode collector tab electrically connected to the positive electrode, a negative electrode, and a negative electrode collector tab electrically connected to the negative electrode. The positive electrode collector sheet wound in a flat shape is positioned on the 1 st end face, and the negative electrode collector sheet wound in a flat shape is positioned on the 2 nd end face. The exterior member includes a 1 st exterior portion made of stainless steel having a bottomed square tube shape and a flange portion at an opening portion, and a 2 nd exterior portion made of stainless steel. The electrode group is housed in a space formed by welding the flange portion of the 1 st exterior portion and the 2 nd exterior portion. The 1 st end surface and the 2 nd end surface of the electrode group face the inner surface of the side wall of the 1 st exterior portion. The terminal portion includes a through hole opened in a side wall of the 1 st exterior portion, and an external terminal electrically connected to the positive electrode or the negative electrode. The external terminal includes a head portion and a shaft portion protruding from the head portion. The head portion protrudes toward the outside of the 1 st housing portion. The shaft portion is caulked and fixed to the through hole of the 1 st exterior portion. The head portion of the external terminal is provided with a pair of tapered portions. The bus bar is fixed to the tapered portion.
The power storage module according to embodiment 1 will be described with reference to fig. 1 to 10.
The power storage module 100 includes a battery and a bus bar. The cell shown in figure 1 is a non-aqueous dielectric cell. The battery includes a package member 1, an electrode group 2, a positive terminal portion 3, a negative terminal portion 4, and a nonaqueous electrolyte medium (not shown).
As shown in fig. 1 to 3, the exterior member 1 includes a 1 st exterior portion 5 and a 2 nd exterior portion 6. The 1 st exterior part 5 is a bottomed rectangular cylindrical container made of stainless steel, and has a flange part 5b at an opening part 5 a. As shown in fig. 1, 2, and 4, a recess projecting toward the inside of the container is provided in the vicinity of the center of a corner portion of the 1 st exterior portion 5 connecting the short side wall and the bottom, and the bottom of the recess is an inclined surface 5 c. The 1 st exterior portion 5 has a depth equal to or less than the size of the opening 5a (the maximum length of a portion that becomes the opening area). More preferably, the 1 st exterior portion 5 has a depth equal to or less than the short side of the portion having the opening area (for example, as shown in fig. 1). The 1 st outer cover 5 is made of, for example, a stainless steel plate by shallow drawing. On the other hand, the 2 nd exterior part 6 is a rectangular plate made of stainless steel. The electrode group 2 is housed in a space formed by welding the flange portion 5b of the 1 st exterior portion 5 to the four sides of the 2 nd exterior portion 6. The welding is, for example, resistance seam welding. Resistance seam welding can achieve higher gas tightness and heat resistance at lower cost than laser welding.
As shown in fig. 5, the electrode group 2 has a flat shape. As shown in fig. 6, the electrode group 2 includes a positive electrode 7, a negative electrode 8, and a separator 9 disposed between the positive electrode 7 and the negative electrode 8. The positive electrode 7 includes: a positive electrode current collector in a band shape formed of, for example, foil; a positive electrode current collector tab 7a formed at one end of the positive electrode current collector parallel to the long side; and a positive electrode material layer (positive electrode active material-containing layer) 7b formed on the positive electrode current collector excluding at least the portion of the positive electrode current collector tab 7 a. On the other hand, the negative electrode 8 includes: a negative electrode current collector in a band shape formed of, for example, foil; a negative electrode current collector tab 8a formed at one end of the negative electrode current collector parallel to the long side; and a negative electrode material layer (negative electrode active material-containing layer) 8b formed on the negative electrode current collector except for at least the portion of the negative electrode current collector tab 8 a. In the electrode group 2, the positive electrode 7b of the positive electrode 7 and the negative electrode 8b of the negative electrode 8 are opposed to each other with the separator 9 interposed therebetween, and the positive electrode 7, the separator 9, and the negative electrode 8 are wound in a flat shape such that the positive electrode current collecting tab 7a protrudes from the negative electrode 8 and the separator 9 on one side of the winding shaft and the negative electrode current collecting tab 8a protrudes from the positive electrode 7 and the separator 9 on the other side. Therefore, in the electrode group 2, the positive electrode current collecting tab 7a wound in a flat spiral shape is positioned on the 1 st end surface perpendicular to the winding axis. Further, negative electrode current collecting tab 8a wound in a flat spiral shape is positioned on the 2 nd end surface perpendicular to the winding axis. The insulating sheet (not shown) covers the outermost periphery of the electrode group 2 except for the positive electrode current collecting tab 7a and the negative electrode current collecting tab 8 a. The electrode group 2 holds a nonaqueous electrolyte medium (not shown).
The spare positive electrode lead 11 (1 st positive electrode lead) is formed by bending a conductive plate into a U-shape, and layers of the positive electrode current collecting tab 7a are closely attached to each other with portions (near the center) of the positive electrode current collecting tab 7a other than bent portions at both ends sandwiched therebetween. The positive electrode current collecting tab 7a and the backup positive electrode lead 11 are integrated by welding, and thereby the positive electrode 7 is electrically connected to the backup positive electrode lead 11 via the positive electrode current collecting tab 7 a. The welding is performed, for example, by ultrasonic welding.
The spare negative electrode lead 12 (1 st negative electrode lead) is formed by bending a conductive plate into a U-shape, and the layers of the negative electrode current collecting tab 8a are closely attached to each other with the portions (near the center) of the negative electrode current collecting tab 8a other than the bent portions at both ends sandwiched therebetween. The negative electrode current collecting tab 8a and the spare negative electrode lead 12 are integrated by welding, and thereby the negative electrode 8 is electrically connected to the spare negative electrode lead 12 via the negative electrode current collecting tab 8 a. The welding is performed, for example, by ultrasonic welding.
The positive electrode terminal portion 3 and the negative electrode terminal portion 4 will be explained. The positive terminal portion 3 and the negative terminal portion 4 have the same structure, and therefore, the positive terminal portion 3 will be described as an example. Fig. 7 is a perspective view showing a portion where a bus bar is attached to the head of the positive terminal portion 3 of the battery shown in fig. 1. Fig. 8 is a cross-sectional view of the battery shown in fig. 1, taken along the axial direction of the positive electrode external terminal 14 (the direction indicated by line VIII-VIII in fig. 7).
As shown in fig. 8, the positive terminal portion 3 includes a through hole 13 opened in the inclined surface 5c of the 1 st exterior portion 5, a positive electrode external terminal 14, a positive electrode insulating gasket 15, and a positive electrode insulating plate (1 st positive electrode insulating member) 16.
The 1 st through hole 13 is formed in the inclined surface 5c of the 1 st housing part 5 by burring, and an upright portion serving as a side wall protrudes inward of the 1 st housing part 5.
As shown in fig. 8, the positive electrode external terminal 14 includes: a head portion 17 having a substantially truncated pyramid shape and having a long side in the short side direction of the 1 st exterior portion 5; and a cylindrical shaft portion 18. As shown in fig. 7, the head 17 has: a rectangular top surface 17 a; the 1 st and 2 nd inclined surfaces 17b and 17c connected to the long sides of the top surface 17a facing each other; and four-sided tapered portions 17d provided on the lower surface with respect to the top surface 17 a. A cylindrical shaft portion 18 extends from the lower surface of the head portion 17. The positive electrode external terminal 14 is formed of a conductive material such as aluminum or an aluminum alloy.
Since the tapered portions 17d are provided on the respective sides of the lower surface of the head portion 17, the tapered portions provided on the facing short sides and the tapered portions provided on the facing long sides are formed as a pair. The two pairs of tapered portions 17d are each inclined such that the cross-sectional area of the head portion 17 decreases downward. Thus, the two pairs of tapered portions 17d constitute tapered portions in a quadrangular pyramid shape.
The positive electrode external terminal 14 has a rectangular top surface 17a and 1 st and 2 nd inclined surfaces 17b and 17c connected to two opposite sides of the top surface, and thus can change the welding direction by selecting any one of the three surfaces as a welding surface.
As shown in fig. 8, the positive electrode insulating gasket 15 is a cylindrical body (cylindrical portion) having a flange portion 15a at one open end. As shown in fig. 8, the cylindrical portion of the positive electrode insulating gasket 15 is inserted into the through hole 13, and the flange portion 15a is disposed on the outer periphery of the through hole 13 on the outer surface of the 1 st outer housing portion 5. The positive electrode insulating gasket 15 is made of a resin such as a fluororesin, a fluororubber, a polyphenylene sulfide resin (PPS resin), a polyether ether ketone resin (PEEK resin), a polypropylene resin (PP resin), and a polybutylene terephthalate resin (PBT resin).
As shown in fig. 8, the positive electrode insulating plate (1 st positive electrode insulating member) 16 is a rectangular insulating plate having through holes. The positive electrode insulating plate 16 is disposed on the outer surface 5c of the 1 st exterior portion 5. As shown in fig. 8, the flange portion 15a of the positive electrode insulating gasket 15 is inserted into the through hole of the positive electrode insulating plate 16.
As shown in fig. 9, the bus bar 200 has: a flat plate-like 1 st connecting portion 201 having a through hole 201 a; a 2 nd connecting part 202 rising almost vertically from one side of the 1 st connecting part 201 and bent along a short side surface of the 1 st exterior part 5; and a rectangular notch 203 provided near the center of the long side of the 2 nd connecting portion 202. As shown in fig. 8, the end surface 204 of the notch portion 203 has a tapered shape that is inclined so that the opening area decreases as going downward (toward the positive electrode insulating plate 16). The tapered shape of the end surface 204 of the cutout portion 203 corresponds to the shape of the tapered portion 17 d. The cutout portion 203 of the bus bar 200 is inserted into the tapered portion 17d of the head portion 17 of the positive electrode external terminal 14, and as shown in fig. 8, an end surface 204 of the cutout portion 203 is fitted into the tapered portion 17 d. The portion where the tapered portion 17d and the end surface 204 of the cutout portion 203 contact each other is joined by, for example, welding, whereby the positive electrode external terminal 14 and the bus bar 200 are electrically connected. The 1 st connection part 201 can be used for electrical connection with other batteries and the like. Examples of the welding method include laser welding, resistance welding, and ultrasonic welding.
The positive terminal portion 3 may further include a positive terminal lead 19. The positive electrode terminal lead 19 is a conductive plate having a through hole 19 a.
When the positive terminal portion 3 includes the positive terminal lead 19 (No. 2 positive lead), the positive terminal portion 3 may further include the positive insulation reinforcing member 20. As shown in FIG. 10, the positive electrode insulation reinforcing member 20 reinforces the short side wall including the inclined surface 5c of the 1 st exterior portion 5, and has a cross section having a substantially rectangular shape
A word shape. That is, the positive electrode insulation reinforcing member 20 is formed by integrating a rectangular bottom plate 20a, a side plate 20b vertically rising from the long side of the bottom plate 20a, an inclined plate 20c continuous with the long side of the side plate 20b, and an upper plate 20d horizontally extending from the long side of the inclined plate 20 c. The inclined plate 20c has a recess 20 e. The recess 20e is provided with a through hole 20 f. The bottom plate 20a and the side plate 20b of the positive electrode insulating/reinforcing member 20 cover the corner portion formed by the 2 nd exterior part 6 and the 1 st exterior part 5. The shaft portion 18 of the positive electrode external terminal 14 is inserted into the through hole 20f of the inclined plate 20 c. The lower end surface of the positive electrode insulating gasket 15 and the end surface of the side wall of the through hole 13 of the 1 st exterior part 5 are in contact with the surface of the recess 20e of the inclined plate 20 c. Further, the rear surface of the recess 20e of the inclined plate 20c is in contact with the positive terminal lead 19. Further, the upper plate 20d contacts the bottom surface of the 1 st housing portion 5.
With the above arrangement, the positive electrode insulating and reinforcing member 20 can insulate the 1 st exterior portion 5 from the positive electrode terminal lead 19, and can reinforce the short side of the exterior member, particularly the vicinity of the short side wall including the inclined surface 5c of the 1 st exterior portion 5.
The shaft portion 18 of the positive electrode external terminal 14 is inserted into the positive electrode insulating gasket 15, the through hole 20f of the positive electrode insulating reinforcing member 20, and the through hole 19a of the positive electrode terminal lead 19, and then plastically deformed by caulking. As a result, these components are integrated, and the positive electrode external terminal 14 is electrically connected to the positive electrode terminal lead 19. Therefore, the positive electrode external terminal 14 also functions as a rivet. Further, the boundary between the end face of the shaft portion 18 of the positive electrode external terminal 14 and the through hole 19a of the positive electrode terminal lead 19 may be welded by laser or the like, thereby achieving stronger connection and improvement in conductivity.
The positive intermediate lead 21 (3 rd positive lead) is formed by bending a rectangular or belt-shaped conductive plate into a substantially U shape. The positive electrode intermediate lead 21 is disposed between the spare positive electrode lead 11 and the positive electrode terminal lead 19. One outer surface of the positive intermediate lead 21 is fixed to the spare positive lead 11 by, for example, welding, and the other outer surface is fixed to the positive terminal lead 19 by, for example, welding. With this configuration, the spare positive electrode lead 11, the positive electrode intermediate lead 21, and the positive electrode terminal lead 19 are electrically connected. Examples of the welding method include laser welding, resistance welding, and ultrasonic welding.
Negative terminal portion 4 has the same structure as positive terminal portion 3. That is, the negative terminal portion 4 includes a through hole opened on the inclined surface 5c of the 1 st exterior portion 5, a negative external terminal, a negative insulating gasket, and a negative insulating plate (1 st negative insulating member). The negative terminal portion 4 may further include a negative terminal lead (No. 2 negative lead). The negative electrode terminal lead is a conductive plate having a through hole. In the case where the negative terminal portion 4 includes a negative terminal lead, the negative terminal portion 4 may be further provided with a negative insulation reinforcing member. A negative electrode intermediate lead (3 rd negative electrode lead) is disposed between the spare negative electrode lead and the negative electrode terminal lead. These components have the same structure as that described in the positive terminal portion 3. For example, the bus bar having the structure shown in fig. 9 is fitted to the head portion of the negative external terminal. That is, the tapered portion of the head portion of the negative external terminal is inserted into the cutout portion of the bus bar, and the cutout portion is fitted to the tapered portion. The portion where the tapered portion and the end surface of the cutout portion contact each other is joined, for example, by welding, whereby the negative electrode external terminal is electrically connected to the bus bar.
The electrode group 2 is housed in the 1 st exterior portion 5 such that the 1 st end surface 7a faces the positive terminal portion 3 and the 2 nd end surface 8a faces the negative terminal portion 4. Therefore, the plane intersecting the 1 st end face 7a and the 2 nd end face 8a of the electrode group 2 faces the bottom face in the 1 st housing portion 5, and the curved face intersecting the 1 st end face 7a and the 2 nd end face 8a faces the long-side face in the 1 st housing portion 5.
Gaps are formed between the corner portions of the 1 st exterior portion 5 connecting the short side walls and the bottom portion and the 1 st end surface 7a and between the corner portions and the 2 nd end surface 8a of the electrode group 2, respectively. By providing a recess extending inward at the corner of the 1 st housing part 5 connecting the short side wall and the bottom and forming the bottom of the recess as the inclined surface 5c, the dead space in the 1 st housing part 5 is reduced, and therefore, the volumetric energy density of the battery can be increased. Further, by disposing the positive terminal portion 3 and the negative terminal portion 4 on the inclined surface 5c, the area for disposing the terminal portions can be increased as compared with the case where the positive terminal portion 3 and the negative terminal portion 4 are disposed on the short-side surface having no inclined surface. Therefore, the diameters of the shaft portion 18 of the positive electrode external terminal 14 and the shaft portion of the negative electrode external terminal can be increased, and thus a large current (high-rate current) can flow with low resistance.
The 2 nd exterior part 6 functions as a lid of the 1 st exterior part 5. The electrode group 2 is sealed in the exterior member 1 by welding the flange 5b of the 1 st exterior portion 5 to the four sides of the 2 nd exterior portion 6.
The power storage module shown in fig. 1 to 10 described above includes an exterior member that houses the electrode group in a space formed by welding the 1 st exterior portion made of stainless steel having the flange portion at the opening portion and the 2 nd exterior portion made of stainless steel. Since the 1 st and 2 nd exterior parts are made of stainless steel, high strength can be maintained even when the thicknesses of the 1 st and 2 nd exterior parts are reduced. As a result, the flexibility of the exterior member can be improved, and therefore, the electrode group can be easily restrained by pressure reduction sealing, application of a load from the outside of the exterior member, or the like. This makes it easy to realize an assembled battery that can stabilize the inter-electrode distance of the electrode group to reduce the resistance and has vibration resistance and impact resistance. Further, when the flexibility of the 1 st and 2 nd exterior parts is high, the distance from the inner surfaces of the 1 st and 2 nd exterior parts to the electrode group is easily shortened, and therefore, the heat dissipation property of the battery can be improved.
The stainless steel 1 st and 2 nd exterior parts can be easily welded and can be sealed by inexpensive resistance seam welding. Therefore, an exterior member having high gas tightness can be realized at low cost as compared with a laminate film container. In addition, the heat resistance of the exterior member can be improved. For example, SUS304 has a melting point of 1400 ℃ and Al has a melting point of 650 ℃.
Further, by providing the tapered portion at the head portion of the external terminal, it is easy to fix a member such as a bus bar to the head portion. Therefore, when a member such as a bus bar is welded to the head portion of the external terminal, the external terminal can be easily positioned and can be welded at a desired position with high strength. Thus, the reliability of the battery can be further improved.
For example, as illustrated in fig. 8, since the tapered end surface 204 of the cutout portion 203 of the bus bar 200 is fitted to the tapered portion 17d of the quadrangular pyramid shape of the lower surface of the head portion 17, positioning of the bus bar 200 is facilitated, and the bus bar 200 is welded at a predetermined position of the top surface 17a of the head portion 17 with high strength. As a result, the reliability of the battery can be improved.
Further, since a new insulating member can be fixed between the tapered portion of the head portion of the external terminal and the 1 st exterior portion, short-circuiting and the like due to contact of the 1 st exterior portion with another battery and the like can be avoided.
Instead of being provided on all the sides of the lower surface of the head portion of the external terminal, the paired tapered portions may be provided only on the short sides or only on the long sides. The paired tapered portions need not be provided over the entire sides, but may be in a point-symmetric relationship with each other. The paired tapered portions are not limited to one set, and may be provided in plural sets.
Instead of providing the tapered portion on the lower surface of the head portion, the side surface of the head portion may be tapered. Fig. 11 to 16 show this example.
Fig. 11 and 12 show an example in which the head portion has a truncated quadrangular pyramid shape (pyramid shape). As shown in fig. 11, the head portion 117 of the positive terminal portion and/or the negative terminal portion has a quadrangular frustum shape (pyramid shape). That is, the top surface 117a of the head portion 117 is a rectangular plane. The four side surfaces 117b, 117c, 117d, and 117e are tapered surfaces, and are inclined such that the cross-sectional area of the head portion increases as the head portion moves downward. The four side surfaces 117b, 117c, 117d, and 117e function as tapered portions.
As shown in fig. 12, the bus bar 300 has: a flat plate-like first connecting portion 301; a 2 nd connecting part 302 rising almost vertically from one side of the 1 st connecting part 301 and bent along a short side surface of the 1 st housing part 5; and a rectangular through hole 303 provided in the 2 nd connecting portion 302. As shown in fig. 13, the inner surface of the through-hole 303 has a tapered shape that is inclined so that the opening area increases as going downward (the insulating plate 116 side). The tapered shape of the inner surface of the through hole 303 corresponds to the shape of the tapered portions 117b, 117c, 117d, and 117e of the head portion 117. The through-holes 303 of the bus bar 300 are inserted into the tapered portions 117b to 117e of the head portion 117, and as shown in fig. 12, the through-holes 303 are fitted into the tapered portions 117b to 117 e. The portions of the tapered portions 117b to 117e that contact the inner surface of the through-hole 303 are joined by, for example, welding, whereby the positive electrode external terminal and/or the negative electrode external terminal are electrically connected to the bus bar. The 1 st connection portion 301 can be used for electrical connection with other batteries and the like. Examples of the welding method include laser welding, resistance welding, and ultrasonic welding. The 1 st insulating member 116 is disposed between the inclined surface 5C of the 1 st housing part 5, the lower surface of the head part 117, and the 2 nd connecting part 302 of the bus bar 300, and insulates them.
As shown in fig. 14 and 15, the bus bar 400 includes: a flat plate-like first connection portion 401; a 2 nd connecting part 402 rising almost perpendicularly from one side of the 1 st connecting part 401 and bent along the short side surface of the 1 st housing part 5; and a rectangular notch 403 provided near the center of the long side of the 2 nd connecting portion 402. Three end surfaces of the notch 403 have a tapered shape inclined so that the opening area increases downward (toward the insulating plate 116). The tapered shapes of the three end surfaces of the cutout 403 correspond to the shapes of the tapered portions 117b, 117c, 117d, and 117e of the head portion 117. The cutout portion 403 of the bus bar 400 is inserted into the tapered portions 117b, 117c, and 117d of the head portion 117, and as shown in fig. 14 and 15, the cutout portion 403 is fitted into the tapered portions 117b, 117c, and 117 d. The portions of the tapered portions 117b, 117c, and 117d in contact with the end surfaces of the cutout portions 403 are joined by, for example, welding, whereby the positive electrode external terminal and/or the negative electrode external terminal are electrically connected to the bus bar. The 1 st connection part 401 can be used for electrical connection with other batteries or the like. Examples of the welding method include laser welding, resistance welding, and ultrasonic welding. The 1 st insulating member 116 is disposed between the inclined surface 5C of the 1 st housing part 5, the lower surface of the head part 117, and the 2 nd connecting part 402 of the bus bar 400, and insulates them.
Fig. 16 shows an example in which the head portion has a truncated cone shape. As shown in fig. 16, the head 217 of the positive terminal portion and/or the negative terminal portion has a truncated cone shape. That is, the top surface 217a of the head 217 is a circular flat surface. The side circumferential surface 217b is a tapered surface, and is inclined such that the cross-sectional area of the head portion increases as the head portion moves downward. The side circumferential surface 217b functions as a tapered portion.
As shown in fig. 16, the bus bar 500 has: a 1 st connecting portion 501 in a flat plate shape; a 2 nd connecting part 502 rising almost vertically from one side of the 1 st connecting part 501 and bent along the short side surface of the 1 st exterior part 5; and a circular through hole 503 provided in the 2 nd connecting portion 502. The inner peripheral surface of the through hole 503 has a tapered shape that is inclined so that the opening area increases downward (toward the insulating plate 116). The tapered shape of the inner peripheral surface of the through hole 503 corresponds to the shape of the tapered portion 217b of the head portion 217. The through hole 503 of the bus bar 500 is inserted into the tapered portion 217b of the head portion 217, and as shown in fig. 16, the through hole 503 is fitted into the tapered portion 217 b. The portion of the tapered portion 217b in contact with the inner peripheral surface of the through hole 503 is joined by, for example, welding, whereby the positive electrode external terminal and/or the negative electrode external terminal is electrically connected to the bus bar. The 1 st connecting portion 501 can be used for electrical connection with other batteries or the like. Examples of the welding method include laser welding, resistance welding, and ultrasonic welding. The 1 st insulating member 116 is disposed between the inclined surface 5C of the 1 st housing part 5, the lower surface of the head 217, and the 2 nd connecting part 502 of the bus bar 500, and insulates them.
The material constituting the bus bar is not particularly limited, and includes, for example, aluminum, an aluminum alloy, and the like.
The tapered portion may be provided to only one of the positive electrode external terminal and the negative electrode external terminal, or may be provided to both of the positive electrode external terminal and the negative electrode external terminal. By providing the tapered portions on both the positive electrode external terminal and the negative electrode external terminal, the reliability of the battery can be further improved.
The plate thicknesses of the 1 st exterior part and the 2 nd exterior part are preferably in the range of 0.02mm to 0.3 mm. By setting the range, contradictory properties such as mechanical strength and flexibility can be achieved at the same time. A more preferable range of the plate thickness is 0.05mm to 0.15 mm.
The inclined portion is not limited to the vicinity of the central portion of the short side of the exterior member, and may extend over the entire short side of the exterior member.
The flat plate illustrated in fig. 3 can be used for the 2 nd exterior portion, but a member having a flange portion in the opening portion may be used instead of the flat plate. An example of such a structure is the same as the 1 st exterior part.
The exterior member may further include a safety valve or the like, and may release the pressure inside the battery when the internal pressure of the battery increases to a predetermined value or more.
The spare positive electrode lead and the spare negative electrode lead are not limited to the U-shaped conductive plate, and a conductive flat plate may be used. In addition, the spare positive electrode lead or the spare negative electrode lead, or both of them may not be used.
As described above, according to the power storage module of embodiment 1, since the tapered portion is provided at the head portion of the external terminal and the bus bar is fixed to the tapered portion, high strength and reliability can be obtained even when the thicknesses of the 1 st and 2 nd external parts are reduced. Therefore, it is possible to provide a power storage module having excellent flexibility and heat dissipation properties and high strength and reliability.
The battery of the power storage module according to the embodiment may be a primary battery or a secondary battery. An example of the battery according to the embodiment is a lithium ion secondary battery.
The 1 st positive electrode lead and the 1 st negative electrode lead may be formed of, for example, aluminum, an aluminum alloy material, copper, nickel-plated copper, or the like. In order to reduce the contact resistance, the material of the lead is preferably the same as that of the positive electrode current collector or the negative electrode current collector that is likely to be electrically connected to the lead.
The 1 st positive electrode insulating member, the 1 st negative electrode insulating member, and the positive and negative electrode insulating reinforcing members are made of thermoplastic resin such as tetrafluoroethylene perfluoroalkyl vinyl ether copolymer (PFA), polypropylene (PP), Polyethylene (PE), nylon, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), Polytetrafluoroethylene (PTFE), Polyphenylene Sulfide (PPs), and polyether ether ketone (PEEK), for example.
Hereinafter, the positive electrode, the negative electrode, the separator, and the nonaqueous medium included in the battery of the power storage module according to the embodiment will be described.
1) Positive electrode
The positive electrode can include, for example, a positive electrode current collector, a positive electrode material layer held by the positive electrode current collector, and a positive electrode current collector sheet. The positive electrode material layer can include, for example, a positive electrode active material, a conductive agent, and a binder.
As the positive electrode active material, for example, an oxide or a sulfide can be used. Examples of the oxide and sulfide include lithium-occluding manganese dioxide (MnO)2) Iron oxide, copper oxide, nickel oxide, lithium manganese composite oxide (e.g., Li)xMn2O4Or LixMnO2) Lithium nickel composite oxide (e.g., Li)xNiO2) Lithium cobalt composite oxide (e.g., Li)xCoO2) Lithium nickel cobalt complex oxide (e.g., LiNi)1-yCoyO2) Lithium manganese cobalt composite oxide (e.g., Li)xMnyCo1-yO2) Lithium manganese nickel composite oxide having spinel structure (e.g., Li)xMn2-yNiyO4) Lithium phosphate compound having olivine structure (e.g., Li)xFePO4、LixFe1- yMnyPO4、LixCoPO4Iron (Fe) sulfate2(SO4)3) Vanadium oxide (e.g. V)2O5) And lithium nickel cobalt manganese composite oxides. In the chemical formula, x is more than 0 and less than or equal to 1, and y is more than 0 and less than or equal to 1. These compounds may be used alone or in combination as an active material.
The binder is combined to bind the active material to the current collector. Examples of the binder include Polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), and fluororubber.
In order to improve the current collecting performance and suppress the contact resistance between the active material and the current collector, a conductive agent is combined as necessary. Examples of the conductive agent include carbonaceous materials such as acetylene black, carbon black, and graphite.
In the positive electrode material layer, the positive electrode active material and the binder are preferably blended in a proportion of 80 mass% to 98 mass% and 2 mass% to 20 mass%, respectively.
By setting the amount of the binder to 2 mass% or more, sufficient electrode strength can be obtained. Further, by making the content of the insulating material to 20 mass% or less, the amount of the insulating material to be combined in the electrode can be reduced, and the internal resistance can be reduced.
When the conductive agent is added, the positive electrode active material, the binder, and the conductive agent are preferably combined in a proportion of 77 mass% to 95 mass%, 2 mass% to 20 mass%, and 3 mass% to 15 mass%, respectively. The above-described effects can be exhibited by setting the amount of the conductive agent to 3 mass% or more. Further, by setting the content to 15 mass% or less, the decomposition of the nonaqueous electrolyte on the surface of the positive electrode conductive agent during high-temperature storage can be reduced.
The positive electrode current collector is preferably an aluminum foil or an aluminum alloy foil containing at least one element selected from Mg, Ti, Zn, Ni, Cr, Mn, Fe, Cu, and Si.
The positive electrode current collector is preferably integrated with the positive electrode current collecting tab. Alternatively, the positive electrode current collector may be separate from the positive electrode current collector tab.
2) Negative electrode
The negative electrode can include, for example, a negative electrode current collector, a negative electrode material layer held by the negative electrode current collector, and a negative electrode current collector sheet. The anode material layer can include, for example, an anode active material, a conductive agent, and a binder.
As the negative electrode active material, for example, a metal oxide, a metal nitride, an alloy, carbon, or the like, which can occlude and release lithium ions, can be used. Preferably will be able to be above 0.4V (for Li/Li)+) The negative electrode active material is a material that stores and releases lithium ions at a high potential.
A conductive agent is combined to improve current collecting performance and suppress contact resistance between the negative electrode active material and the current collector. Examples of the conductive agent include carbonaceous materials such as acetylene black, carbon black, and graphite.
A binder is combined to fill the gaps between the dispersed negative electrode active material and to bind the negative electrode active material to the current collector. Examples of the binder include Polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), fluororubber, and styrene butadiene rubber.
The active material, the conductive agent, and the binder in the negative electrode material layer are preferably combined at a ratio of 68 mass% to 96 mass%, 2 mass% to 30 mass%, and 2 mass% to 30 mass%, respectively. By setting the amount of the conductive agent to 2 mass% or more, the current collecting performance of the negative electrode layer can be improved. In addition, when the amount of the binder is 2% by mass or more, the adhesion between the negative electrode material layer and the current collector can be sufficiently exhibited, and excellent cycle characteristics can be expected. On the other hand, from the viewpoint of achieving a higher capacity, the conductive agent and the binder are preferably 28 mass% or less, respectively.
As the current collector, a material electrochemically stable at the storage potential and the release potential of lithium of the negative electrode active material is used. The current collector is preferably made of copper, nickel, stainless steel, aluminum, or an aluminum alloy containing at least one element selected from Mg, Ti, Zn, Mn, Fe, Cu, and Si. The thickness of the current collector is preferably in the range of 5 to 20 μm. The current collector having such a thickness can balance the strength of the negative electrode and the weight reduction.
The negative electrode current collector is preferably integrated with the negative electrode current collecting tab. Alternatively, the negative electrode current collector may be separate from the negative electrode current collecting tab.
For example, the negative electrode is produced as follows: the negative electrode active material, the binder, and the conductive agent are suspended in a common solvent to prepare a slurry, and the slurry is applied to a current collector, dried to form a negative electrode material layer, and then pressed. The negative electrode can also be produced as follows: the negative electrode active material, the binder, and the conductive agent are formed into particles to form a negative electrode material layer, and the negative electrode material layer is disposed on the current collector.
3) Diaphragm
The separator may be formed of a porous film containing polyethylene, polypropylene, cellulose, or polyvinylidene fluoride (PVdF), or a synthetic resin nonwoven fabric, for example. Among them, a porous film made of polyethylene or polypropylene can be melted at a certain temperature to cut off a current, and thus safety can be improved.
4) Electrolyte solution
As the electrolytic solution, for example, a nonaqueous electrolyte can be used.
The nonaqueous electrolyte may be, for example, a liquid nonaqueous electrolyte prepared by dissolving an electrolyte in an organic solvent, or a gel-like nonaqueous electrolyte obtained by compounding a liquid electrolyte with a polymer material.
The liquid nonaqueous electrolyte preferably has an electrolyte dissolved in an organic solvent at a concentration of 0.5 mol/L to 2.5 mol/L.
Examples of the electrolyte dissolved in the organic solvent include lithium perchlorate (LiClO)4) Lithium hexafluorophosphate (LiPF)6) Lithium tetrafluoroborate (LiBF)4) Lithium arsenic hexafluoride (LiAsF)6) Lithium trifluoromethanesulfonate (LiCF)3SO3) And lithium bis (trifluoromethylsulfonyl) imide [ LiN (CF)3SO2)2]Such lithium salts, and mixtures of these. The electrolyte is preferably an electrolyte that is difficult to oxidize even at a high potential, and most preferably LiPF 6.
Examples of the organic solvent include: cyclic carbonates such as Propylene Carbonate (PC), Ethylene Carbonate (EC), and vinylene carbonate; chain carbonates such as diethyl carbonate (DEC), dimethyl carbonate (DMC), and ethyl methyl carbonate (MEC); cyclic ethers such as Tetrahydrofuran (THF), 2-methyltetrahydrofuran (2MeTHF) and Dioxolane (DOX); chain ethers such as Dimethoxyethane (DME) and Diethoxyethane (DEE); gamma-butyrolactone (GBL), Acetonitrile (AN), and Sulfolane (SL). These organic solvents may be used alone or as a mixed solvent.
Examples of the polymer material include polyvinylidene fluoride (PVdF), Polyacrylonitrile (PAN), and polyethylene oxide (PEO).
Alternatively, as the nonaqueous electrolyte, an ambient temperature molten salt (ionic melt) containing lithium ions, a polymer solid electrolyte, an inorganic solid electrolyte, or the like may be used.
The normal temperature molten salt (ionic melt) is a compound that can exist as a liquid at normal temperature (15 to 25 ℃) in an organic salt formed by a combination of an organic cation and an anion. The ambient temperature molten salt includes an ambient temperature molten salt in which a monomer exists as a liquid, an ambient temperature molten salt which becomes a liquid by being mixed with an electrolyte, and an ambient temperature molten salt which becomes a liquid by being dissolved in an organic solvent. In general, an ambient temperature molten salt used for a nonaqueous electrolyte battery has a melting point of 25 ℃ or lower. In addition, the organic cation generally has a quaternary ammonium backbone.
According to the power storage module of the embodiment described above, since the bus bar is fixed to the tapered portion provided at the head portion of the external terminal, reliability can be improved.
The terminal portion may be applied to both the positive terminal portion and the negative terminal portion, but may be applied to either the positive terminal portion or the negative terminal portion.
(embodiment 2)
The battery pack according to embodiment 2 includes at least one of the power storage modules according to the embodiment. The battery pack according to the embodiment may include a battery pack in which the power storage module according to the embodiment is a single cell.
Fig. 17 to 24 show examples of assembled batteries of the battery according to embodiment 2.
As shown in fig. 17 to 20, the battery pack 601 includes a battery pack 101 in which the power storage module 100 according to embodiment 1 shown in fig. 1 is used as a single cell. A plurality of (e.g., 4) single cells 1001～1004The outer covering members 1 are laminated with their main surfaces facing each other. A plurality of single cells 1001～1004Are connected in series. As shown in fig. 17 and 18, a bus bar 200 is used on one short-side surface of the battery pack 101. As shown in fig. 19 and 20, a bus bar 602 having a triangular columnar shape is used on the other short-side surface. As shown in fig. 20, the cell 100 located outermost (uppermost in the figure) of the other short-side surface1The positive electrode external terminal 14 of (a),and is located in the single cell 1001The adjacent single cells 1002The negative external terminal 314 of (a) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular pillar-shaped bus bar 602 is disposed between the top surface 17a of the head portion of the positive electrode external terminal 14 and the top surface 317a of the head portion of the negative electrode external terminal 3614.
In addition, is located at the single cell 1002The adjacent single cells 1003And the positive electrode external terminal 14 and the cell 1003The adjacent single cells 1004The negative external terminal 314 of (a) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular pillar-shaped bus bar 602 is disposed between the top surface 17a of the head portion of the positive electrode external terminal 14 and the top surface 317a of the head portion of the negative electrode external terminal 314. The negative electrode insulating plate (1 st negative electrode insulating member) 216 is disposed between the inclined surface 5C and the head of the negative electrode external terminal 314 to insulate them.
In addition, the two top surfaces of the external terminal and the bus bar are electrically connected by soldering, respectively. Examples of the welding include laser welding, arc welding, and resistance welding.
On the other hand, as shown in fig. 18, the bus bar 200 is attached to the head of the external terminal of the opposite pole of each of the positive and negative external terminals connected by the triangular columnar bus bar. The fixing method of the bus bar 200 is as described in fig. 8. Is fixed to the single cell 1002The 1 st connection part 201 of the bus bar 200 of the positive electrode external terminal 14 and the single cell 100 fixed thereto3The 1 st connection portion 201 of the bus bar 200 of the negative electrode external terminal (not shown) overlaps. By inserting a bolt 603 into the through hole of the 1 st connection portion 201 and fixing the bolt 603 with a nut 604, the negative electrode external terminal and the positive electrode external terminal are electrically connected by the bus bar.
As shown in fig. 18, the cell 100 located on the outermost side (the uppermost layer in the figure) is connected to the cell 1001The bus bar 200 into which the tapered portion of the head portion of the negative electrode external terminal is fitted can function as a negative electrode external terminal of the battery pack 101. And the other (lowermost layer in the figure) cell 1004The bus bar 200 fitted to the tapered portion of the head portion of the positive electrode external terminal 14 can function as a positive electrode external terminal of the battery pack 101 And (4) function.
As a result of the above-described connection, the cell 1001～1004Are connected in series to obtain 4 series-connected assembled batteries 101. In the battery pack including the battery pack 101, a bus bar in a triangular column shape is arranged between the top surface of the head portion of the negative external terminal and the top surface of the head portion of the positive external terminal, and they are joined to each other to perform electrical connection. The positive and negative external terminals, which are in a relative polar relationship with the positive and negative external terminals, are electrically connected using bus bars fitted into the tapered portions of the head portions. As a result, the gaps between the cells can be reduced. Therefore, the volumetric energy density of the assembled battery 101 can be improved.
The assembled battery 601 shown in fig. 21 to 24 includes an assembled battery in which two assembled battery cells, two cells of which are connected in parallel, are connected in series. The power storage module 100 according to embodiment 1 shown in fig. 1 is used as a cell. A plurality of (e.g., 4) unit cells 1001～1004The outer sheathing members 1 are laminated such that their main surfaces face each other.
As shown in fig. 22, the cell 100 located on the outermost side (the uppermost side in the figure) is located on one of the short-side surfaces (the 1 st short-side surface) of the assembled battery1And the negative external terminal 314 of (2) and the battery cell 100 1The adjacent single cells 1002The negative external terminal 314 of (a) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular pillar-shaped bus bars 602 are arranged between the top surfaces 317a of the head portions of the negative external terminals 314. Reference numeral 216 denotes a negative electrode insulating plate (1 st negative electrode insulating member).
In addition, is located at the single cell 1002The adjacent single cells 1003And the positive electrode external terminal 14 and the cell 1003The adjacent single cells 1004The positive electrode external terminal 14 of (2) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular pillar-shaped bus bars 602 are disposed between the top surfaces 17a of the head portions of the positive electrode external terminals 14.
In addition, the two top surfaces of the external terminal and the bus bar are electrically connected by soldering, respectively. Examples of welding include laser welding, arc welding, and resistance welding.
In the single cell 1001And a single cell 1002As shown in fig. 22, the negative electrode external terminal 314 is provided on the 1 st short-side surface, and as shown in fig. 24, the positive electrode external terminal 14 is provided on the other short-side surface (the 2 nd short-side surface). Single cell 1001Positive electrode external terminal 14 and cell 1002The positive electrode external terminal 14 of (2) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular pillar-shaped bus bars 602 are disposed between the top surfaces 17a of the head portions of the positive electrode external terminals 14.
According to the above method, by forming the single cell 1001And a single cell 1002The 1 st group of battery cells 102 are connected in parallel.
On the other hand, in the single cell 1003And a single cell 1004As shown in fig. 22, the positive electrode external terminal 14 is provided on the 1 st short side surface, and as shown in fig. 24, the negative electrode external terminal 314 is provided on the 2 nd short side surface. Single cell 1003Negative electrode external terminal 314 and single cell 1004The negative external terminal 314 of (a) is electrically connected by a bus bar 602 of a triangular column shape. The triangular pillar-shaped bus bars 602 are arranged between the top surfaces 317a of the head portions of the negative external terminals 314.
According to the above method, by forming the single cell 1003And a single cell 1004The 2 nd group battery cells 103 are connected in parallel.
Further, as shown in fig. 24, the cell 100 is provided on the 2 nd short side surface of the battery pack 1012Positive electrode external terminal 14 and cell 1003The bus bar 200 is mounted on the negative external terminal 314. The fixing method of the bus bar 200 is as described in fig. 8. Is fixed to the single cell 1002The 1 st connection part 201 of the bus bar 200 of the positive electrode external terminal 14 and the single cell 100 fixed thereto3The 1 st connection portion 201 of the bus bar 200 of the negative external terminal 314 overlaps. By inserting a bolt 603 into the through hole of the 1 st connection portion 201 and fixing the bolt 603 with a nut 604, the negative electrode external terminal 314 and the positive electrode external terminal 14 are electrically connected by the bus bar 200. Thus, the 1 st group battery cell 102 and the 2 nd group battery cell 103 are connected in series And (4) connecting.
As shown in fig. 22, the cell 100 located on one of the outermost sides (the uppermost side in the figure) is located on the 1 st short-side surface of the assembled battery 1011The bus bar 200 into which the tapered portion of the head portion of the negative electrode external terminal 314 is fitted can function as a negative electrode external terminal of the battery pack 101. In addition, the other (lowermost layer in the figure) cell 1004The bus bar 200 fitted to the tapered portion of the head portion of the positive electrode external terminal 14 in (2) can function as a positive electrode external terminal of the battery pack 101.
As a result of the above-described connection, the single cell 100 was obtained1And a single cell 1002 Group 1 battery unit 102 and single cell 100 connected in parallel3And a single cell 1004And a group battery 101 in which 2 nd group battery cells 103 connected in parallel are connected in series. In the assembled battery including the assembled battery 101, a bus bar having a triangular column shape is arranged between the top surfaces of the respective head portions of the positive electrode external terminal and the negative electrode external terminal, and these are joined to each other to perform electrical connection. Further, the 1 st group battery cell 102 and the 2 nd group battery cell 103 are electrically connected using a bus bar that fits into the tapered portion of the head portion of the external terminal. Therefore, the gaps between the unit cells can be reduced. As a result, the volumetric energy density of the assembled battery 101 can be increased.
Further, an insulating space may be provided between adjacent cells, and a gap of 0.03mm or more may be provided, or an insulating member (for example, polypropylene, polyphenylene sulfide, or an epoxy resin as a resin, alumina or zirconia as a fine ceramic) may be interposed therebetween.
The bus bar can be formed of, for example, aluminum, an aluminum alloy material, or the like.
Since the battery pack according to embodiment 2 includes at least one of the power storage modules according to the embodiments, it is possible to provide a battery pack that can be made thinner and improved in flexibility, has excellent reliability, and can reduce the manufacturing cost.
Battery packs are used, for example, as power sources for electronic devices and vehicles (railway vehicles, automobiles, bicycles with prime movers, light vehicles, trackless electric vehicles, etc.).
The assembled battery may include a configuration in which a plurality of power storage modules are electrically connected in series, in parallel, or in a combination of series and parallel. In addition to the assembled Battery, the assembled Battery may include a circuit such as a Battery Control Unit (Battery Control Unit), but a circuit included in a device (for example, a vehicle) in which the assembled Battery is mounted may be used as the Battery Control Unit. The battery control unit has a function of monitoring the voltage and current of the single cell and the assembled battery, or both of them, and preventing overcharge and overdischarge.
In the power storage module according to at least one embodiment described above, since the tapered portion is provided at the head portion of the external terminal and the bus bar is fixed to the tapered portion, a power storage module having high energy density and reliability can be provided.
In the power storage module according to embodiment 1, the tapered portion is provided at the head portion of the external terminal, and the bus bar is fixed to the tapered portion. This embodiment will be described as embodiment 3 below.
(embodiment 3)
The power storage module according to embodiment 3 will be described with reference to fig. 25 and 26. The power storage module 1000 shown in fig. 25 and 26 has the same structure as the power storage modules shown in fig. 1 to 10, except that the structures of the head portions of the external terminals and the bus bars are different.
As shown in fig. 26, positive electrode external terminal 14 includes a head portion 417 and a columnar shaft portion 418. The head portion 417 has a substantially rectangular parallelepiped shape and has a rectangular top surface 417 a. A cylindrical shaft portion 418 extends from the head portion 417 in the axial direction, and is inserted into the hollow portion of the positive electrode insulating spacer 15 and the through hole 19a of the positive electrode terminal lead 19. The tip of the shaft portion 418 protrudes from the through hole 19a of the positive electrode terminal lead 19. The protruding portion is expanded in diameter by caulking, and covers the periphery of the through hole 19 a. The flange portion 15a of the positive electrode insulating gasket 15 and the positive electrode insulating plate 16 are interposed between the step portion connecting the head portion 417 and the shaft portion 418 and the 1 st exterior portion 5.
As shown in fig. 25 and 26, the bus bar 700 includes: a flat plate-like 1 st connection part 701 having a rectangular through hole 701 a; and a plate-like 2 nd connecting part 702 extending from the long side of the 1 st connecting part 701 and being horizontal to the plane direction of the 2 nd exterior parts 5 and 6.
The back surface of the 1 st connection part 701 of the bus bar 700 is in contact with the top surface 417a of the head part 417. The periphery of the through hole 701a on the back surface is fixed to the top surface 417a by welding. The 2 nd connecting portion 702 of the bus bar 700 is arranged in parallel to the extending direction of the flange portion 5b of the 1 st exterior portion 5. In other words, the 2 nd connecting portion 702 is disposed parallel to the 1 st and 2 nd exterior portions 5 and 6, i.e., the upper and lower surfaces of the power storage module.
According to the 3 rd power storage module described above, since the bus bar is fixed to the head portion of the external terminal, a power storage module having high energy density and reliability can be provided. Further, the bus bar includes a plate-shaped connecting portion disposed parallel to the extending direction of the flange portion of the 1 st exterior portion, and thus the power storage modules can be electrically connected to each other with a small gap between the power storage modules.
(embodiment 4)
The battery pack of embodiment 4 includes the power storage module of embodiment 3. The battery pack according to the embodiment may include a battery pack in which the power storage module according to the embodiment is a single cell.
Fig. 27 to 34 show examples of assembled batteries including the power storage module according to embodiment 3.
As shown in fig. 27 to 30, the assembled battery 601 includes an assembled battery in which the power storage module 1000 according to embodiment 3 shown in fig. 25 and 26 is used as a single cell. A plurality of (e.g., 4) unit cells 10001～10004The outer covering members 1 are laminated in the 1 st direction X with their main surfaces facing each other. A plurality of single cells 10001～10004Are connected in series. Each single cell 10001～10004A bus bar 800 having the structure described below is provided instead of the bus bar 700. The bus bar 800 includes: a flat plate-like 1 st connecting portion 801 having a rectangular through hole 801 a; an intermediate portion 802 extending from the long side of the 1 st connecting portion 801; and a plate-shaped 2 nd connecting portion 803 extending from the long side of the intermediate portion 802. Of intermediate section 802The plane direction is parallel to the side face of the 1 st housing part 5. The 2 nd connecting portion 803 has a plane direction horizontal to the plane directions of the 1 st and 2 nd exterior portions 5 and 6. The 2 nd connecting portion 803 has a circular through hole 803 a.
As shown in fig. 27 and 28, a bus bar 800 is used on one short-side surface of the assembled battery. As shown in fig. 29 and 30, a bus bar 602 having a triangular columnar shape is used on the other short-side surface. As shown in fig. 30, the cell 1000 located outermost (uppermost in the figure) on the other short-side surface 1And the cell 1000 in the 1 st direction X with respect to the positive electrode external terminal 141Opposing cells 10002The negative external terminal 314 of (a) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular-columnar bus bar 602 is interposed between the top surface of the head portion of the positive electrode external terminal 14 and the top surface of the head portion of the negative electrode external terminal 314, and is fixed to these top surfaces by welding or the like.
In addition, in the 1 st direction X, the cell 10002Opposing single cells 10003And the cell 1000 in the 1 st direction X with respect to the positive electrode external terminal 143Opposing single cells 10004The negative external terminal 314 of (a) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular-columnar bus bar 602 is interposed between the top surface of the head portion of the positive electrode external terminal 14 and the top surface of the head portion of the negative electrode external terminal 314, and is fixed to these top surfaces by welding or the like.
In addition, the two top surfaces of the external terminals and the bus bars are electrically connected by welding, respectively. Examples of welding include laser welding, arc welding, and resistance welding.
On the other hand, as shown in fig. 27 and 28, a bus bar 800 is attached to the head of the external terminal of the opposite pole of each of the positive and negative external terminals connected by the triangular columnar bus bar. The back surface of the 1 st connection portion 801 of the bus bar 800 is in contact with the top surface 417a of the head portion of the positive external terminal or the top surface 314a of the head portion of the negative external terminal. The periphery of the through hole 701a on the back surface is fixed to the top surfaces 417a and 314a by welding. The 2 nd connecting portion 803 of the bus bar 800 is disposed parallel to the 1 st and 2 nd exterior portions 5 and 6, that is, the upper and lower surfaces of the power storage module.
Is fixed to the single cell 10002The 2 nd connecting portion 80 of the bus bar 800 of the positive electrode external terminal 14 and the unit cell 1000 fixed thereto3The 2 nd connection part 803 of the bus bar 800 of the negative external terminal 314 overlap. By inserting a bolt 603 into the through hole 803a of the 2 nd connecting portion 803 and fixing the bolt 603 with a nut 604, the negative electrode external terminal and the positive electrode external terminal are electrically connected by the bus bar.
As shown in fig. 28, the cell 1000 located on the outermost side (the uppermost layer in the figure) is connected to the cell1The bus bar 800 into which the tapered portion of the head portion of the negative external terminal of (a) is fitted can function as a negative external terminal of the battery pack 601. And the other (lowermost layer in the figure) cell 10004The bus bar 800 in which the tapered portion of the head portion of the positive electrode external terminal 14 is fitted can function as a positive electrode external terminal of the battery pack 601.
As a result of the above-described connection, the cell 10001～10004Are connected in series to obtain a 4-series battery pack. In the battery pack 601 including the battery pack, a triangular pillar-shaped bus bar is disposed between and joined to the top surface of the head portion of the negative external terminal and the top surface of the head portion of the positive external terminal, thereby performing electrical connection. The positive and negative external terminals, which are in a relative polar relationship with the positive and negative external terminals, are electrically connected using bus bars fixed to the top surface of the head. When the cells are electrically connected to each other in this manner, the gap between the cells can be reduced. Therefore, the volumetric energy density of the assembled battery can be improved.
The assembled battery 601 shown in fig. 31 to 34 includes two assembled battery cells in which two single cells are connected in parallel, and these assembled battery cells are connected in series to form an assembled battery. The battery module 1000 is used as a single cell. A plurality of (e.g., 4) cells 10001～10004The outer covering members 1 are laminated in the 1 st direction X with their main surfaces facing each other.
As shown in fig. 32, on one short-side surface (1 st short-side surface) of the assembled battery, the cell 1000 located on the outermost side (uppermost layer in the figure) is1And the negative electrode external terminal 314 and the cell 1000 in the 1 st direction X1Opposing single cells 10002The negative external terminal 314 of (a) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular pillar-shaped bus bar 602 is disposed between the top surfaces of the head portions of the negative external terminals 314. Reference numeral 216 denotes a negative electrode insulating plate (1 st negative electrode insulating member).
In addition, in the 1 st direction X, the cell 10002Opposing single cells 10003And the cell 1000 in the 1 st direction X with respect to the positive electrode external terminal 143Opposing single cells 10004The positive electrode external terminal 14 of (2) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular pillar-shaped bus bar 602 is disposed between the top surfaces of the head portions of the positive electrode external terminals 14.
In addition, the two top surfaces of the external terminal and the bus bar are electrically connected by welding, respectively. Examples of the welding include laser welding, arc welding, and resistance welding.
In the single cell 10001And a single cell 10002As shown in fig. 32, the negative electrode external terminal 314 is provided on the 1 st short-side surface, and as shown in fig. 34, the positive electrode external terminal 14 is provided on the other short-side surface (the 2 nd short-side surface). Single cell 10001Positive electrode external terminal 14 and cell 10002The positive electrode external terminal 14 of (2) is electrically connected to the bus bar 602 having a triangular columnar shape. The triangular pillar-shaped bus bar 602 is disposed between the top surfaces of the head portions of the positive electrode external terminals 14.
According to the above method, by using the single cell 10001And a single cell 10002And connected in parallel to obtain group 1 battery cell 1002.
On the other hand, in the cell 10003And a single cell 10004As shown in fig. 32, the positive electrode external terminal 14 is provided on the 1 st short side surface, and as shown in fig. 34, the negative electrode external terminal 314 is provided on the 2 nd short side surface. Single cell 10003Negative electrode external terminal 314 and cell 10004The negative external terminal 314 of (a) is electrically connected to the bus bar 602 having a triangular columnar shape. A triangular-columnar bus bar 602 is disposed at the head of the negative external terminal 314 Are located between each other.
According to the above method, by using the single cell 10003And a single cell 10004The 2 nd group battery cells 1003 are connected in parallel.
In addition, as shown in fig. 34, on the 2 nd short side surface of the assembled battery, on the single cell 10002Positive electrode external terminal 14 and cell 10003The bus bar 800 is mounted on the negative external terminal 314. The fixing method of the bus bar 800 is as described in fig. 28. Is fixed to the cell 10002The 2 nd connecting portion 803 of the bus bar 800 of the positive electrode external terminal 14 and the unit cell 1000 fixed thereto3The 2 nd connection part 803 of the bus bar 800 of the negative external terminal 314 overlap. By inserting a bolt 603 into the through hole of the 2 nd connection part 803 and fixing the bolt 603 with a nut 604, the negative electrode external terminal 314 and the positive electrode external terminal 14 are electrically connected by the bus bar 800. Thereby, the 1 st group battery cell 1002 and the 2 nd group battery cell 1003 are connected in series.
As shown in fig. 32, the cell 1000 fixed to the outermost one (the uppermost layer in the figure) is located on the 1 st short-side surface of the assembled battery1The bus bar 800 at the head of the negative external terminal 314 in (b) can function as a negative external terminal of the assembled battery. In addition, the cell 1000 fixed to the other side (the lowermost layer in the drawing) 4The bus bar 800 at the head of the positive electrode external terminal 14 in (b) can function as a positive electrode external terminal of the assembled battery.
As a result of the above-described connection, the single cell 1000 can be obtained1And a single cell 10002 Group 1 battery unit 1002 and single cell 1000 connected in parallel3And a single cell 10004And a group battery in which the 2 nd group battery cells 1003 connected in parallel are connected in series. In the battery pack 601 including the battery cells, the triangular pillar-shaped bus bars are disposed between the top surfaces of the respective head portions of the positive and negative external terminals, and are joined to each other, thereby performing electrical connection. Further, the 1 st group battery cell 1002 and the 2 nd group battery cell 1003 are electrically connected using a bus bar fixed to the head of the external terminal. When the single cell is thus assembledWhen the electric connection is performed, the gap between the unit cells can be reduced. As a result, the volumetric energy density of the assembled battery can be increased.
Since the battery pack according to the fourth embodiment includes at least one of the power storage modules according to the embodiments, it is possible to provide a battery pack that can be made thinner and improved in flexibility, has excellent reliability, and can reduce manufacturing costs.
The embodiments of the present invention have been described above, and these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various ways, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the scope equivalent thereto.
Claims (7)
1. A battery pack including a plurality of cells and a plurality of bus bars electrically connecting the plurality of cells, wherein,
the battery includes:
a flat electrode group in which a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode are wound in a flat shape; the positive electrode includes a strip-shaped positive electrode collector and a positive electrode material layer formed on the positive electrode collector except for one end of the positive electrode collector parallel to the long side, and one end of the positive electrode collector parallel to the long side where the positive electrode material layer is not formed serves as a positive electrode collector sheet; the negative electrode includes a strip-shaped negative electrode current collector and a negative electrode material layer formed on the negative electrode current collector except for one end portion of the negative electrode current collector parallel to the long side, and the one end portion of the negative electrode current collector parallel to the long side where the negative electrode material layer is not formed serves as a negative electrode current collector tab; the positive electrode collector sheet wound in a flat shape is positioned on the 1 st end face, and the negative electrode collector sheet wound in a flat shape is positioned on the 2 nd end face;
an exterior member including a 1 st exterior portion made of stainless steel having a bottomed cylindrical shape and a flange portion at an opening portion, and a 2 nd exterior portion made of stainless steel, the electrode group being housed in a space formed by welding the flange portion of the 1 st exterior portion and the 2 nd exterior portion, the 1 st end surface and the 2 nd end surface facing inner surfaces of side walls of the 1 st exterior portion, the 1 st exterior portion having a through hole opened in the side walls; and
A positive electrode external terminal and a negative electrode external terminal, the positive electrode external terminal being connected to the positive electrode current collecting tab through the 1 st end surface, the negative electrode external terminal being connected to the negative electrode current collecting tab through the 2 nd end surface, the positive electrode external terminal and the negative electrode external terminal each including a head portion and a shaft portion extending from the head portion, the shaft portion being caulked and fixed to the through hole opened in the side wall of the 1 st housing portion, the head portion projecting outward of the 1 st housing portion,
the plurality of cells are stacked with the principal surfaces of the exterior members facing each other, and the positive electrode external terminal and the negative electrode external terminal of each cell located adjacent to each other are located adjacent to each other,
the plurality of bus bars include: a 1 st connecting portion which is disposed parallel to an extending direction of the flange portion of the 1 st exterior portion and has a through hole; and a 2 nd connecting part rising from the 1 st connecting part and bent along a side surface of the 1 st exterior part,
in the case where the batteries located adjacent to each other are connected to each other, the 2 nd connecting portion of one bus bar is fixed to the head portion of the positive external terminal of one battery, the 2 nd connecting portion of the other bus bar is fixed to the head portion of the negative external terminal of the other battery, and the 1 st connecting portion of the one bus bar and the 1 st connecting portion of the other bus bar are connected to each other through the through holes.
2. The battery pack according to claim 1,
a tapered portion is provided in each of the head portion of the positive electrode external terminal and the head portion of the negative electrode external terminal,
the 2 nd connecting portion of the one bus bar and the 2 nd connecting portion of the other bus bar are fixed to the tapered portion, respectively.
3. The battery pack according to claim 2, wherein,
a tapered portion having a quadrangular pyramid shape is provided as the tapered portion on a side surface or a lower surface of the head portion,
the 2 nd connecting portion of the bus bar has a rectangular through hole having a tapered inner surface,
the through hole of the bus bar is fitted to the tapered portion of the head portion.
4. The battery pack according to claim 2, wherein,
a tapered portion having a quadrangular pyramid shape is provided as the tapered portion on a side surface or a lower surface of the head portion,
the 2 nd connecting portion of the bus bar has a rectangular cutout having a tapered end surface,
the slit of the bus bar is fitted to the tapered portion of the head portion.
5. The battery pack according to claim 2, wherein,
a tapered portion having a conical shape is provided as the tapered portion on a side surface of the head portion,
The 2 nd connecting portion of the bus bar has a circular through hole having a tapered inner peripheral surface,
the through hole of the bus bar is fitted to the tapered portion of the head portion.
6. The battery pack according to claim 2, wherein,
a tapered portion having a conical shape is provided as the tapered portion on a side surface of the head portion,
the 2 nd connecting portion of the bus bar has an elliptical through-hole having a tapered inner peripheral surface,
the through hole of the bus bar is fitted to the tapered portion of the head portion.
7. The battery pack according to any one of claims 1 to 6,
the battery pack further includes insulating members respectively disposed between the head portion of the positive electrode external terminal and the 1 st exterior portion of the exterior member, and between the head portion of the negative electrode external terminal and the 1 st exterior portion of the exterior member.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/046001 WO2019123619A1 (en) | 2017-12-21 | 2017-12-21 | Electricity storage module and battery pack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111033804A CN111033804A (en) | 2020-04-17 |
| CN111033804B true CN111033804B (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780094078.6A Active CN111033804B (en) | 2017-12-21 | 2017-12-21 | Power storage module and battery pack |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6972175B2 (en) |
| CN (1) | CN111033804B (en) |
| WO (1) | WO2019123619A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7288671B2 (en) * | 2020-01-10 | 2023-06-08 | Ｃｏｎｎｅｘｘ Ｓｙｓｔｅｍｓ株式会社 | secondary battery pack |
| CN113257574B (en) * | 2021-05-31 | 2021-09-10 | 南通江海电容器股份有限公司 | Piercing method for core cladding lead of aluminum electrolytic capacitor |
| CN116420271A (en) * | 2021-10-22 | 2023-07-11 | 宁德时代新能源科技股份有限公司 | Battery, electric equipment, method and equipment for preparing battery monomer |
| CN114583338A (en) * | 2022-03-03 | 2022-06-03 | 广汽埃安新能源汽车有限公司 | Battery monomer and battery package |
| WO2024000505A1 (en) * | 2022-06-30 | 2024-01-04 | 宁德时代新能源科技股份有限公司 | Battery and electric apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012079456A (en) * | 2010-09-30 | 2012-04-19 | Mitsubishi Heavy Ind Ltd | Battery pack |
| CN105940522A (en) * | 2014-01-29 | 2016-09-14 | 株式会社东芝 | Battery and sealing body unit |
| WO2016204147A1 (en) * | 2015-06-15 | 2016-12-22 | 株式会社 東芝 | Battery and battery pack |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003142043A (en) * | 2001-07-09 | 2003-05-16 | Hitachi Maxell Ltd | Battery |
| JP5595830B2 (en) * | 2009-08-26 | 2014-09-24 | 株式会社東芝 | Battery, assembled battery, and method of manufacturing assembled battery |
| JP2015159229A (en) * | 2014-02-25 | 2015-09-03 | 住友電気工業株式会社 | Exterior package for electrochemical device and electric double layer capacitor |
| EP3309856B1 (en) * | 2015-06-12 | 2020-12-30 | Kabushiki Kaisha Toshiba | Battery and battery module |
| US20170125772A1 (en) * | 2015-10-28 | 2017-05-04 | Bosch Battery Systems GmbH | Push-On Clip |
| JP2017126537A (en) * | 2016-01-15 | 2017-07-20 | 株式会社東芝 | Battery pack |
-
2017
- 2017-12-21 CN CN201780094078.6A patent/CN111033804B/en active Active
- 2017-12-21 WO PCT/JP2017/046001 patent/WO2019123619A1/en active Application Filing
- 2017-12-21 JP JP2019559973A patent/JP6972175B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012079456A (en) * | 2010-09-30 | 2012-04-19 | Mitsubishi Heavy Ind Ltd | Battery pack |
| CN105940522A (en) * | 2014-01-29 | 2016-09-14 | 株式会社东芝 | Battery and sealing body unit |
| WO2016204147A1 (en) * | 2015-06-15 | 2016-12-22 | 株式会社 東芝 | Battery and battery pack |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019123619A1 (en) | 2019-06-27 |
| CN111033804A (en) | 2020-04-17 |
| JP6972175B2 (en) | 2021-11-24 |
| JPWO2019123619A1 (en) | 2020-08-20 |
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