WO2019111425A1 - 電池パック - Google Patents
電池パック Download PDFInfo
- Publication number
- WO2019111425A1 WO2019111425A1 PCT/JP2018/010420 JP2018010420W WO2019111425A1 WO 2019111425 A1 WO2019111425 A1 WO 2019111425A1 JP 2018010420 W JP2018010420 W JP 2018010420W WO 2019111425 A1 WO2019111425 A1 WO 2019111425A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- battery
- battery pack
- reinforcing portion
- stress concentration
- Prior art date
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Classifications
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- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a battery pack provided with a plurality of single cells.
- the assembled battery described in Patent Document 1 includes a battery module group in which a plurality of battery modules are stacked.
- the battery module is configured by stacking a plurality of flat type batteries in which electrode terminals are electrically connected to each other and storing the stacked battery in a housing.
- an electrode terminal is led to the outside from an exterior material that seals the power generation element.
- the battery assembly described in Patent Document 1 is characterized in that a reinforcing portion for reinforcing the housing is provided at a position corresponding to the electrode terminal of the flat battery in the battery module (the same document, Claims) See 1).
- a battery pack provided with a plurality of single cells is mounted on a vehicle such as an electric car or a hybrid car, for example, and a large force acts on the housing at the time of a collision of the vehicle, for example. Is considered. Even in such a case, it is required to suppress the crushing of the housing and to protect the unit cells inside the housing.
- One aspect of the present invention provides a battery pack capable of preventing crushing of a housing and protecting single cells in the housing.
- One aspect of the present invention is a battery pack including a housing having a battery housing space and a secondary battery disposed in the battery housing space, wherein a reinforcing portion extends from one end of the battery housing space to the other end
- the battery pack is characterized in that the reinforcing portion has a concave stress concentration portion facing the battery housing space.
- the housing is reinforced by the rigidity of the reinforcing portion extending from one end to the other end of the battery housing space inside the housing, and the external force in the direction from one end to the other end of the battery housing space is the housing When it acts on, it can control the collapse of the case.
- the reinforcing portion has a concave stress concentration portion facing the battery housing space. Therefore, when a load exceeding the buckling load acts on the reinforcing portion, stress concentrates on the concave stress concentration portion facing the battery accommodation space, and the reinforcement portion is on the opposite side to the stress concentration portion, ie, in a direction away from the battery accommodation space. To buckle. Thereby, the secondary battery disposed in the battery accommodating space inside the housing can be protected from the destruction due to the deformation of the reinforcing portion.
- a battery pack capable of preventing crushing of the housing and protecting single cells in the housing.
- FIG. 2 is a perspective view showing a stacked state of a plurality of secondary batteries of the battery pack of FIG. 1.
- disconnected in the cross section which follows the IV-IV line of FIG. The enlarged view of the area
- FIG. 3 is a perspective view of a reinforcing portion disposed in the housing shown in FIG. 2;
- the perspective view which shows the state which removed some housings and auxiliary machinery of the battery pack of FIG. Sectional drawing which shows the cross-sectional shape of the reinforcement part shown in FIG. 8, and its modification.
- the enlarged plan view which shows the shape of the stress concentration part of the reinforcement part shown in FIG. 8, and its modification.
- the top view which shows the shape of the stress concentration part of the reinforcement part shown in FIG. 8, and its modification.
- FIG. 1 is an external perspective view of a battery pack 100 according to an embodiment of the present invention.
- FIG. 2 is a perspective view of the battery pack 100 of FIG. 1 from which a part of the case 10 and accessories are removed.
- FIG. 3 is a perspective view showing a stacked state of the plurality of secondary batteries 1 accommodated in the housing 10 of the battery pack 100 of FIG.
- FIG. 4 is a perspective view showing a state of being cut at a cross section taken along line IV-IV of FIG.
- FIG. 5 is an enlarged view of a region V surrounded by an alternate long and short dash line shown in FIG.
- the battery pack 100 includes a housing 10 having a battery storage space S1, and the secondary battery 1 disposed in the battery storage space S1 inside the housing 10.
- the battery pack 100 of the present embodiment has a reinforcing portion 30 extending from one end of the battery housing space S1 to the other end, and the reinforcing portion 30 has a concave stress facing the battery housing space S1. It is characterized by having a concentration unit 31.
- the housing 10 has, for example, a substantially rectangular parallelepiped rectangular box shape.
- Each drawing shows an orthogonal coordinate system in which the depth direction of the housing 10 is the X axis, the width direction is the Y axis, and the height direction is the Z axis.
- the housing 10 has a dimension in the width direction larger than a dimension in the depth direction. That is, the housing 10 has a height direction (Z-axis direction) perpendicular to the bottom wall, a longitudinal direction (Y-axis direction) perpendicular to the height direction, and short sides perpendicular to the longitudinal direction and the height direction. It is formed in the shape of a rectangular box having a direction (X-axis direction).
- the housing 10 has, for example, a rectangular box-shaped main body 11 whose upper portion is opened, and a cover 12 which covers the opening 11 a of the upper portion of the main body 11.
- the material of the main body 11 is, for example, a metal material such as electrogalvanized steel plate
- the material of the cover 12 is, for example, a resin material such as polybutylene terephthalate (PBT).
- a pair of high voltage terminals 101 and 101 which are external terminals of the positive electrode and the negative electrode of the battery pack 100 are provided at one end in the short direction of the cover 12 of the housing 10 and at both ends in the longitudinal direction.
- a signal connector 102 is provided at a position adjacent to.
- the battery housing space S1 is a region, space, section or housing portion for housing the secondary battery 1 inside the housing 10.
- the battery housing space S1 is adjacent to one side wall 10a in the short direction of the housing 10, and is provided on one side in the short direction of the housing 10.
- Battery housing space S1 faces, for example, three side walls 10a, 10c, 10d on one side of housing 10 and both sides in the longitudinal direction, bottom wall 10e and cover 12, and terminal surface 1a of secondary battery 1. It is a space defined by being surrounded by the resin-made bus bar case 26 which is disposed.
- a battery module 20 in which a plurality of secondary batteries 1 are stacked in a battery housing space S1 is disposed.
- each of the secondary batteries 1 constituting the battery module 20 is, for example, a flat rectangular lithium ion secondary battery.
- the secondary battery 1 has a wide rectangular side surface 1w having the largest area on both sides in the thickness direction, and has a long rectangular bottom surface 1b and a terminal surface 1a at one end and the other end in the short side direction of the wide side surface 1w.
- the narrow side 1 n has the smallest area at both ends in the longitudinal direction of the wide side 1 w.
- the secondary battery 1 has external terminals 1P and 1N on a terminal surface 1a which is one side surface along the thickness direction. More specifically, external terminals 1P and 1N of a positive electrode and a negative electrode are provided at one end and the other end in the longitudinal direction of the terminal surface 1a of the secondary battery 1, respectively.
- the flat rectangular secondary battery 1 is stacked in the thickness direction, and a wide side surface 1 w facing the thickness direction of the secondary battery 1 faces the bottom wall 10 e of the housing 10.
- the battery module 20 has, for example, two or more rows of battery rows L1 composed of a plurality of secondary batteries 1 stacked in the thickness direction.
- the two or more battery lines L1 are arranged, for example, in the longitudinal direction of the terminal surface 1a of the secondary battery 1 constituting each battery line L1.
- the terminal surfaces 1a of all the secondary batteries 1 constituting each battery column L1 of the battery module 20 are directed in one direction, that is, forward in the depth direction (X-axis positive direction) of the case 10 of the battery pack 100.
- Two secondary batteries 1 adjacent to each other in the stacking direction are alternately arranged to be inverted by 180 degrees.
- the external terminal 1P of the positive electrode of one secondary battery 1 and the external terminal 1N of the negative electrode of the other secondary battery 1 Adjacent in the stacking direction.
- bus bar 21 from secondary battery 1 arranged at one end in the stacking direction of each battery row L1 to secondary battery 1 arranged at the other end in the stacking direction. Connected in series. More specifically, battery module 20 has an external terminal 1P of the positive electrode of one secondary battery 1 and an external terminal of the negative electrode of the other secondary battery 1 among two secondary batteries 1 adjacent to each other in the stacking direction. The plurality of secondary batteries 1 are connected in series by sequentially connecting 1N with the bus bar 21 in the stacking direction. Note that, in the battery module 20, for example, a plurality of battery lines L1 may be connected in series or in parallel by the bus bar 21.
- the battery module 20 has cell holders 22 facing the wide side 1 w on both sides in the thickness direction of the individual secondary batteries 1.
- the cell holder 22 has a plurality of convex portions 22a in contact with the wide side surface 1w on the surface facing the wide side surface 1w of the secondary battery 1, and is alternately stacked with the secondary battery 1 in the stacking direction of the secondary battery 1
- the individual secondary batteries 1 are held from both sides in the thickness direction.
- the cell holders 22 at both ends in the stacking direction of the secondary battery 1 have flat surfaces on the side opposite to the secondary battery 1.
- the cell holder 22 can be manufactured, for example, by injection molding using a resin material having electrical insulation such as PBT as a material.
- the battery module 20 includes the secondary battery 1, the bus bar 21, the cell holder 22, the end plate 23, the side plate 24, the center plate 25, the bus bar case 26, the electronic circuit board 27, and the thermistor 28 5), a voltage detection line V1, and accessories 29 (see FIG. 6).
- the configuration of the bus bar case 26 is shown through the electronic circuit board 27.
- the bus bar 21 is a metal plate-like member connected to the external terminals 1P and 1N of the secondary battery 1.
- the pair of end plates 23 is, for example, a metal plate-like member, and is disposed outside the cell holders 22 at both ends in the stacking direction of the secondary battery 1, and a plurality of secondary batteries via the plurality of cell holders 22. 1 is held from both sides in the stacking direction.
- the side plate 24 is, for example, a metal plate-like member, and is disposed at both ends in the arrangement direction of the two or more battery rows L1 arranged in the longitudinal direction of the terminal surface 1a of the secondary battery 1 It faces the narrow side surface 1 n of the secondary battery 1 through a resin member having an electrical insulation property such as a part of 22.
- the pair of side plates 24 has screw holes at upper and lower ends in the height direction of the housing 10, for example, and is fixed to the end plate 23 by bolts.
- Center plate 25 is, for example, a plate-like member made of metal, is disposed between battery row L1 and battery row L1, and secondary battery 1 via a resin member having electrical insulation such as a part of cell holder 22. Opposite the narrow side 1 n of the When battery row L1 is in two rows, one center plate 25 is disposed between battery rows L1. When battery row L1 is in three or more rows, two or more center plates 25 are in battery row L1. Placed in between.
- the center plate 25 has, for example, screw holes at upper and lower ends in the height direction of the housing 10 and is fixed to the end plate 23 by bolts.
- the bus bar case 26 is, for example, a plate-like or frame-like member made of an electrically insulating resin and is disposed to face the terminal surfaces 1 a of the plurality of secondary batteries 1 constituting the battery module 20.
- the bus bar case 26 has an opening at a position corresponding to the external terminals 1P and 1N of the plurality of secondary batteries 1, for example, and supports the bus bar 21 on a support provided around the opening and is adjacent
- the bus bars 21 are electrically isolated by the partition walls.
- the electronic circuit board 27 is fixed to, for example, the bus bar case 26 and disposed so as to face the terminal surface 1 a of the secondary battery 1 via the bus bar case 26.
- the electronic circuit board 27 includes, for example, a voltage detection circuit, a temperature detection circuit, and a control circuit.
- the electronic circuit board 27 is connected to, for example, the signal connector 102 of the battery pack 100 and the accessories 29 via a signal line.
- the thermistor 28 is connected to, for example, the temperature detection circuit of the electronic circuit board 27 via a temperature detection line 28a.
- the thermistor 28 is disposed, for example, in contact with the terminal surfaces 1a of some of the secondary batteries 1 of each battery line L1, and measures the temperature of the secondary batteries 1.
- the bus bar 21 is supported by the bus bar case 26.
- the bus bar 21 is joined by laser welding to the external terminal 1P of the positive electrode of the adjacent secondary battery 1 and the external terminal 1N of the negative electrode of the other secondary battery 1
- the secondary batteries 1 to be connected are connected in series.
- the voltage detection line V1 is supported, for example, by the bus bar case 26 and connected to the voltage detection circuits of the several bus bars 21 and the electronic circuit board 27.
- FIG. 6 is a plan view showing a state in which accessories 29 are disposed inside housing 10 shown in FIG.
- FIG. 7 is a cross-sectional view taken along the line VII-VII shown in FIG.
- the battery pack 100 of the present embodiment is provided inside the housing 10 so as to be biased toward the side wall 10b on the front side in the short direction, and the accessory housing space S2 adjacent to the battery housing space S1 is Have.
- accessories 29 of battery pack 100 are arranged, for example, in accessory accommodation space S2.
- the accessory 29 includes, for example, a junction box.
- reinforcement portion 30 is disposed in accessory housing space S2, extends in the longitudinal direction of housing 10 from one end to the other end of battery housing space S1, and is offset from center C of housing 10 in the lateral direction. It is arranged. More specifically, the battery housing space S1 is provided on the rear side in the depth direction of the housing 10, and the reinforcing portion 30 is disposed on the front side of the center C in the depth direction of the housing 10 .
- the battery housing space S1 is, in a broad sense, an area in which the battery module 20 is disposed, and as described above, three side walls 10a, 10c, 10d, one side in the short direction of the housing 10 and both sides in the longitudinal direction.
- the space is defined by the bottom wall 10 e and the cover 12 and the bus bar case 26 made of resin and disposed to face the terminal surface 1 a of the secondary battery 1.
- both ends of the reinforcing portion 30 are in contact with both side walls 10 c and 10 d of the housing 10 in the longitudinal direction of the housing 10.
- the reinforcing portion 30 extends from one end to the other end of the battery housing space S1 in the longitudinal direction of the housing 10.
- battery accommodation space S1 is a space in which the secondary battery 1 is accommodated in a narrow sense. That is, battery accommodation space S1 is a field where battery row L1 of two rows or multiple rows of battery modules 20 is arranged, for example. More specifically, battery housing space S1 is defined by, for example, rear side wall 10a in the depth direction of housing 10, and end plate 23, side plate 24, center plate 25 and bus bar case 26 of battery module 20. Space. In this case, both end portions of the reinforcing portion 30 in the longitudinal direction of the housing 10 extend outward beyond both end portions of the plurality of battery housing spaces S1 aligned in the longitudinal direction of the housing 10.
- the reinforcing portion 30 is disposed to face the terminal surface 1 a of the secondary battery 1 via the component parts of the battery module 20 such as the bus bar case 26 and the bus bar 21. Further, the reinforcing portion 30 is directly disposed on the top surface of the bottom wall 10 e of the housing 10 as shown in FIGS. 5 and 4, or of the bottom wall 10 e of the housing 10 as shown in FIG. It is disposed on the upper surface via a sheet-like or plate-like member. In addition, reinforcing portion 30 is arranged at a position most biased to battery housing space S1 in auxiliary machine housing space S2, for example, between reinforcing member 30 and side wall 10b on the front side in the depth direction of housing 10. Auxiliary machinery 29 such as a junction box is disposed.
- FIG. 8 is a perspective view of the reinforcing portion 30 disposed in the housing 10 shown in FIG.
- the reinforcing portion 30 is, for example, a solid columnar, beam-like or rod-like member having no hollow inside.
- the material of the reinforcing portion 30 is, for example, a metal material such as stainless steel or aluminum alloy.
- the cross-sectional shape of the reinforcing portion 30 is rectangular, and a concave stress concentration portion 31 is provided on the surface of the reinforcing portion 30 facing the battery accommodation space S1.
- the reinforcing portion 30 has two stress concentration portions 31 in the extending direction, that is, in the longitudinal middle portion of the housing 10.
- the stress concentration portion 31 may be singular or three or more.
- the stress concentration portion 31 is a recess provided in the reinforcing portion 30. More specifically, the stress concentration portion 31 is formed to be recessed forward in the depth direction of the housing 10 from the surface of the reinforcing portion 30 facing the battery storage space S1. As shown in FIG. 2, the opening 31 a of the stress concentration portion 31 is opened in the surface of the reinforcing portion 30 facing the battery accommodation space S1. The bottom surface 31 b of the stress concentration portion 31 is provided at a predetermined depth position forward in the depth direction of the housing 10 from the opening 31 a substantially in parallel with the surface facing the battery accommodation space S1 of the reinforcing portion 30.
- the stress concentration portion 31 has inclined surfaces 31 c at both end portions in the longitudinal direction of the housing 10 and has a substantially trapezoidal shape in a plan view.
- the stress concentration portion 31 is also a notch provided in the reinforcing portion 30. More specifically, the stress concentration portion 31 is formed by cutting a part of the portion of the reinforcing portion 30 facing the battery storage space S1 forward in the depth direction of the housing 10. Further, in the example shown in FIG. 8, the stress concentration portion 31 is also a thin portion provided in the reinforcing portion 30. That is, the stress concentration portion 31 is a portion in which the thickness of the reinforcing portion 30 in the depth direction of the housing 10 is thinner than the other portions of the reinforcing portion 30.
- the stress concentration portion 31 is provided at a position facing at least a part of the components of the battery module 20 protruding toward the reinforcing portion 30.
- at least a part of the components of the battery module 20 facing the reinforcing portion 30 is disposed inside the concave stress concentration portion 31.
- concave stress concentration portion 31 is provided, for example, at a position facing at least one of thermistor 28, which is a component of battery module 20, bus bar 21, and voltage detection line V1. There is.
- the reinforcing portion 30 has screw holes 32 at both ends in the extending direction, ie, the longitudinal direction of the housing 10.
- the reinforcing portion 30 is fixed to the side walls 10c and 10d at both ends in the longitudinal direction of the housing 10 by bolts passing through the side walls 10c and 10d at both ends in the longitudinal direction of the housing 10 be able to.
- the reinforcing portion 30 has recesses 33 and 34 on the upper and lower surfaces in the height direction of the housing 10 respectively, and has through holes 35 at positions corresponding to the recesses 33 and 34. ing.
- a protruding tab portion 23a is disposed.
- the recess 34 on the upper surface of the reinforcing portion 30 is provided, for example, to avoid interference with the accessories 29 and the components of the battery module 20.
- the tab portion 23a of the end plate 23 of the battery module 20 and the bottom wall 10e of the housing 10 have through holes at positions corresponding to the through holes 35 of the reinforcing portion 30, for example.
- the reinforcing portion 30 has a through hole in the bottom wall 10 e of the housing 10, a through hole in the tab portion 23 a of the end plate 23 of the battery module 20, and the reinforcing portion 30 in the portion where the recess 33 is provided on the lower surface.
- the bolt is fixed to the bottom wall 10 e of the housing 10 by fastening a nut to a bolt inserted into the through hole 35.
- the reinforcing portion 30 fastens a nut to a bolt inserted through the through hole of the bottom wall 10 e of the housing 10 and the through hole 35 of the reinforcing portion 30 at a portion where the recess 34 is provided on the upper surface.
- the reinforcing portion 30 fastens a nut to a bolt inserted through the through hole of the bottom wall 10 e of the housing 10 and the through hole 35 of the reinforcing portion 30 at a portion where the recess 34 is provided on the upper surface.
- the reinforcing portion 30 has chamfers 36 and 36 on the lower surface of both end portions in the extending direction, that is, both end portions in the longitudinal direction of the housing 10.
- the chamfered portion 36 has an inclined surface 36 a that is inclined so as to gradually approach the bottom wall 10 e of the housing 10 from the outside to the inside in the longitudinal direction of the housing 10.
- the chamfered portion 36 prevents interference between both end portions of the reinforcing portion 30 and the corner portions between the side walls 10c and 10d of the housing 10 and the bottom wall 10e, and the reinforcing portion 30 is formed on the bottom wall 10e of the housing 10. It can be placed stably on top.
- the battery pack 100 of the present embodiment is mounted on a vehicle such as an electric car or a hybrid car, for example.
- the signal connector 102 is connected to the vehicle controller, and receives information exchange and power supply via the signal connector 102.
- Battery pack 100 stores the power supplied to high voltage terminals 101 and 101 in secondary battery 1 and supplies the power stored in secondary battery 1 to the outside through high voltage terminals 101 and 101. For example, when the vehicle collides, an external force exceeding the crushing strength of the case 10 may act on the case 10 of the battery pack 100.
- the battery pack 100 of the present embodiment includes the housing 10 having the battery storage space S1, and the secondary battery 1 disposed in the battery storage space S1. Further, the battery pack 100 of the present embodiment has a reinforcing portion 30 extending from one end of the battery housing space S1 to the other end. As described above, the reinforcing portion 30 has the concave stress concentration portion 31 facing the battery housing space S1.
- the housing 10 can be reinforced by the rigidity of the reinforcing portion 30 extending from one end to the other end of the housing 10. Therefore, according to battery pack 100 of the present embodiment, for example, even when an external force causing load exceeding crush load of housing 10 acts on housing 10 in the longitudinal direction of housing 10, The rigidity can suppress crushing of the housing 10. However, for example, if a load exceeding the buckling load acts on the reinforcing portion 30 in the longitudinal direction of the housing 10, the reinforcing portion 30 may be bent.
- FIG. 9 is a perspective view showing a part of the case 10 and the accessories 29 of the battery pack 100 of FIG. 1 removed as in FIG. 2.
- an external force exceeding the crushing load of the housing 10 acts in the longitudinal direction of the housing 10
- a load exceeding the buckling load acts on the reinforcing portion 30, and the reinforcing portion 30 is bent.
- An example is shown.
- illustration of a recess and a bolt for fixing the reinforcing portion 30 to the housing 10 is omitted.
- the reinforcing portion 30 has a concave stress concentration portion 31 facing the battery storage space S1. Therefore, when a load exceeding the buckling load acts on the reinforcing portion 30, the stress is concentrated on the concave stress concentration portion 31 facing the battery accommodation space S1, and the reinforcing portion 30 is buckled starting from the stress concentration portion 31. As shown in FIG. 9, it bends in the direction opposite to the battery housing space S1. Thereby, secondary battery 1 arranged in battery housing space S1 inside housing 10 can be protected from breakage due to deformation of reinforcing portion 30.
- a battery module 20 in which a plurality of secondary batteries 1 are stacked in the battery housing space S1 is disposed.
- the housing 10 can be reinforced by the reinforcing portion 30, and the battery module 20 disposed in the battery housing space S1 inside the housing 10 can be protected.
- a plurality of secondary batteries 1 for in-vehicle use can be used. The reliability and safety of the provided battery pack 100 can be improved.
- the flat rectangular secondary battery 1 is stacked in the thickness direction, and the wide side 1 w facing the thickness direction of the secondary battery 1 is the bottom of the housing 10 It faces the wall 10e.
- the secondary battery 1 has the external terminals 1P and 1N on the terminal surface 1a which is one side surface along the thickness direction, and the reinforcing portion 30 is a terminal of the secondary battery 1 It faces the surface 1a. Thereby, the terminal surface 1 a of the secondary battery 1 can be protected by the reinforcing portion 30, and the reliability of the battery pack 100 can be improved.
- the housing 10 has a height direction perpendicular to the bottom wall 10 e, a longitudinal direction perpendicular to the height direction, and a short side perpendicular to the longitudinal direction and the height direction. It has a rectangular box shape having a direction, and has an accessory storage space S2 adjacent to the battery storage space S1 in the short side direction.
- the reinforcing portion 30 is disposed in the accessory housing space S2, extends in the longitudinal direction of the housing 10, and is disposed at a position offset from the center C in the short direction of the housing 10.
- the accessory housing space S2 acts as a buffer.
- the crushing of the battery housing space S1 can be suppressed to protect the secondary battery 1.
- the reinforcing portion 30 is disposed in the accessory housing space S2 opposite to the battery housing space S1 in the short side direction of the housing 10, and is disposed at a position shifted from the center C in the short side direction of the housing 10. Therefore, the reinforcing portion 30 can be easily bent in the direction away from the battery storage space S1, and the secondary battery 1 can be protected.
- the reinforcing portion 30 is disposed on the top surface of the bottom wall 10 e of the housing 10.
- the bottom wall 10 e of the housing 10 can be reinforced by the reinforcing portion 30. Therefore, the reliability of the battery pack 100 can be improved by improving the crushing strength of the housing 10 and protecting the secondary battery 1 by the housing 10.
- the reinforcing portion 30 can be supported by the bottom wall 10 e of the housing 10, and the reinforcing portion 30 can be easily fixed to the housing 10.
- both end portions of the reinforcing portion 30 are in contact with both side walls 10 c and 10 d of the housing 10 in the longitudinal direction of the housing 10.
- the side walls 10 c and 10 d at both ends in the longitudinal direction of the housing 10 can be reinforced by the reinforcing portion 30. Therefore, the reliability of the battery pack 100 can be improved by improving the crushing strength of the housing 10 and protecting the secondary battery 1 by the housing 10.
- the reinforcing portion 30 can be supported by the side walls 10 c and 10 d at both ends in the longitudinal direction of the housing 10, and the reinforcing portion 30 can be easily fixed to the housing 10.
- the battery pack 100 of the present embodiment at least a part of the components of the battery module 20 facing the reinforcing portion 30 is disposed inside the concave stress concentration portion 31.
- the space can be effectively utilized to arrange the components, and the battery pack 100 can be miniaturized.
- the component of the battery module 20 disposed inside the stress concentration portion 31 is the thermistor 28, the disposition of the thermistor 28 is improved, and in the case of the bus bar 21 or the voltage detection line V1, the reinforcing portion 30 and Short circuit can be prevented.
- the stress concentration portion 31 is a recess provided in the reinforcing portion 30.
- the recess that is the stress concentration portion 31 to be opposed to the battery accommodation space S1
- the bottom portion of the recess that is the stress concentration portion 31 The stress is concentrated, and the reinforcing portion 30 is bent to the side opposite to the battery housing space S1.
- secondary battery 1 arranged in battery housing space S1 inside housing 10 can be protected from breakage due to deformation of reinforcing portion 30.
- the stress concentration portion 31 is a notch provided in the reinforcing portion 30.
- the notch which is the stress concentration portion 31 to be opposed to the battery accommodation space S1
- the notch which is the stress concentration portion 31 The stress is concentrated at the bottom, and the reinforcing portion 30 is bent to the side opposite to the battery housing space S1.
- secondary battery 1 arranged in battery housing space S1 inside housing 10 can be protected from breakage due to deformation of reinforcing portion 30.
- the stress concentration portion 31 is a thin portion provided in the reinforcing portion 30.
- the reinforcing portion 30, which is the stress concentration portion 31 to face the battery housing space S1
- the thin portion, which is the stress concentration portion 31 when a load exceeding the buckling load acts on the reinforcement portion 30, the thin portion, which is the stress concentration portion 31.
- the stress is concentrated on the side wall, and the reinforcing portion 30 bends to the side opposite to the battery housing space S1.
- secondary battery 1 arranged in battery housing space S1 inside housing 10 can be protected from breakage due to deformation of reinforcing portion 30.
- the battery pack 100 capable of protecting the unit cells inside the housing 10 while suppressing the crushing of the housing 10.
- the battery pack 100 which concerns on this invention is not limited to the structure of the battery pack 100 which concerns on the above-mentioned embodiment.
- modifications of the battery pack 100 according to the embodiment will be described.
- FIG. 10 is a cross-sectional view showing a cross-sectional shape of the reinforcing portion 30 shown in FIG. 8 and a modification thereof.
- the reinforcing portion 30 may be a hollow cylindrical shape having the hollow portion 37 inside, and the channel shape having a U-shaped cross section, the angle having an L-shaped cross section, or the H-shaped cross section It may be a shaped or I-shaped beam-shaped member or a plate-shaped member.
- FIG. 11 is an enlarged plan view showing the shape of the stress concentration portion 31 of the reinforcing portion 30 shown in FIG. 8 and a modification thereof.
- the stress concentration portion 31 may be, for example, an arc-shaped, U-shaped, or V-shaped recess or notch provided in the reinforcing portion 30, and even if it is a slit provided in the reinforcing portion 30. Good.
- the stress concentration portion 31 having such a shape, the buckling strength and bending direction of the reinforcing portion 30 can be appropriately adjusted.
- FIG. 12 is a plan view showing a modified example of the stress concentration portion 31 of the reinforcing portion 30 shown in FIG.
- the stress concentration portion 31 may be, for example, a bending portion or a bending portion provided by bending or bending the reinforcing portion 30.
- the stress concentration portion 31 is a portion facing the battery housing space S1 of the reinforcing portion 30 to form a concave shape, and more specifically, is a concave bottom portion of the reinforcing portion 30.
- FIG. 13 is a perspective view showing a modification of the reinforcing portion 30 shown in FIG.
- the reinforcing portion 30 may be a rib integrally provided on the housing 10.
- the reinforcing portion 30 is provided by causing a part of the bottom wall 10 e of the housing 10 to protrude in the height direction of the housing 10.
- the embodiment of the battery pack according to the present invention is not limited to the configuration in which a plurality of secondary batteries and battery modules are disposed in the battery accommodation space, and a configuration in which one secondary battery is disposed in the battery accommodation space 1 is included in an embodiment of a battery pack according to the present invention.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Applications Claiming Priority (2)
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JP2017233158A JP2021028864A (ja) | 2017-12-05 | 2017-12-05 | 電池パック |
JP2017-233158 | 2017-12-05 |
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WO2019111425A1 true WO2019111425A1 (ja) | 2019-06-13 |
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PCT/JP2018/010420 WO2019111425A1 (ja) | 2017-12-05 | 2018-03-16 | 電池パック |
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JP (1) | JP2021028864A (zh) |
CN (1) | CN208189662U (zh) |
WO (1) | WO2019111425A1 (zh) |
Cited By (1)
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WO2022030121A1 (ja) * | 2020-08-04 | 2022-02-10 | 株式会社Gsユアサ | 蓄電装置 |
Families Citing this family (2)
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WO2021049315A1 (ja) * | 2019-09-10 | 2021-03-18 | ビークルエナジージャパン株式会社 | 電池パック |
CN216720146U (zh) * | 2022-01-12 | 2022-06-10 | 宁德时代新能源科技股份有限公司 | 电池和用电设备 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009061915A (ja) * | 2007-09-06 | 2009-03-26 | Mitsubishi Motors Corp | 電気自動車 |
JP2014019203A (ja) * | 2012-07-13 | 2014-02-03 | Mitsubishi Motors Corp | 電池パックトレー |
JP2015223925A (ja) * | 2014-05-27 | 2015-12-14 | 日産自動車株式会社 | 電動車両のバッテリ搭載構造 |
WO2016013150A1 (ja) * | 2014-07-22 | 2016-01-28 | パナソニックIpマネジメント株式会社 | 電池モジュール |
JP2016115599A (ja) * | 2014-12-17 | 2016-06-23 | トヨタ自動車株式会社 | 蓄電モジュールの車載構造 |
-
2017
- 2017-12-05 JP JP2017233158A patent/JP2021028864A/ja active Pending
-
2018
- 2018-03-16 WO PCT/JP2018/010420 patent/WO2019111425A1/ja active Application Filing
- 2018-03-20 CN CN201820377963.7U patent/CN208189662U/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009061915A (ja) * | 2007-09-06 | 2009-03-26 | Mitsubishi Motors Corp | 電気自動車 |
JP2014019203A (ja) * | 2012-07-13 | 2014-02-03 | Mitsubishi Motors Corp | 電池パックトレー |
JP2015223925A (ja) * | 2014-05-27 | 2015-12-14 | 日産自動車株式会社 | 電動車両のバッテリ搭載構造 |
WO2016013150A1 (ja) * | 2014-07-22 | 2016-01-28 | パナソニックIpマネジメント株式会社 | 電池モジュール |
JP2016115599A (ja) * | 2014-12-17 | 2016-06-23 | トヨタ自動車株式会社 | 蓄電モジュールの車載構造 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2022030121A1 (ja) * | 2020-08-04 | 2022-02-10 | 株式会社Gsユアサ | 蓄電装置 |
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CN208189662U (zh) | 2018-12-04 |
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