JP4902156B2 - Battery pack - Google Patents

Description

  The present invention relates to a battery pack in which an outer periphery of a thin battery is covered with an exterior frame.

  Thin battery packs are conveniently used by being mounted on various portable electric devices. In particular, it is an optimal shape for an electric device such as a mobile phone or PDA that needs to be thinned as a whole. Since the battery pack of this shape cannot be thinned as long as the thin battery is not thinned, research has been conducted on how to thin the thin battery. Currently, polymer batteries are being developed as extremely thin thin batteries. Since the polymer battery uses an aluminum laminate film for the exterior, the entire battery can be made extremely thin. Furthermore, a thin battery of a lithium ion secondary battery using iron or aluminum for an outer can has been developed.

  Currently developed thin batteries such as polymer batteries and lithium ion secondary batteries have already been designed to be considerably thin. Furthermore, studies have been conducted to make these thin batteries thinner without reducing the charging capacity. In addition, a battery pack incorporating a thin battery is also designed to be thin. In particular, battery packs attached to devices that are required to be thinner, such as portable electric devices, are required to be designed to be thinner. For this reason, it is extremely important to design a thin battery pack without reducing the charging capacity of the thin battery, and a battery pack capable of realizing this is required.

  For the purpose of realizing this, the present applicant has developed a battery pack in which an outer frame having openings on both sides is fixed to the outer periphery of a thin battery, and the outer frame is fixed to the thin battery with an insulating sheet. (See Patent Document 1).

  The battery pack described in this publication is shown in the exploded perspective view of FIG. In this battery pack, a thin battery 102 is attached to an outer frame 101 formed of plastic in a rectangular frame shape, and an insulating sheet 103 is bonded to the surface of the thin battery 102. Further, the battery pack is formed in a rectangular frame shape that covers the both side surfaces and both end surfaces of the thin battery 102 by providing the exterior frame 101 with openings 104 that expose the front and back surfaces of the thin battery 102 to the outside. . The outer frame 101 is equal in thickness to the thin battery 102 or the outer frame 101 is thinner than the thin battery 102. Further, the exterior frame 101 is divided into a first case 101A and a second case 101B on the front and back surfaces of the thin battery 102. The first case 101 </ b> A and the second case 101 </ b> B are formed into a rectangular frame shape by a side case portion 101 a that covers the side surface of the thin battery 102 and an end case portion 101 b that covers the end surface of the thin battery 102. The outer corner portion of the portion 101a is a curved surface. The first case 101A and the second case 101B are connected by bonding an insulating sheet 103 to the surface of the outer side surface of the side case portion 101a of the first case 101A and the second case 101B.

  The battery pack shown in FIG. 1 can be thinned until the overall thickness is substantially equal to the thin battery 102. However, the battery pack having this structure has a drawback in that it takes time and labor to manufacture and assemble the outer frame because the outer frame fixed to the outer periphery of the thin battery is divided into two in the thickness direction.

  On the other hand, as shown in FIG. 2, a battery pack in which the outer frame 201 is divided into two in the longitudinal direction instead of the thickness direction of the thin battery 202 has been developed. In this battery pack, as shown in the exploded perspective view of FIG. 2, the exterior frame 201 is divided into two in the front and the back to form a first case 201A and a second case 201B, which are connected to the front and rear from the electrode surface and end surface of the thin battery 202. The exterior frame 201 is configured. As a result, the thickness of the battery pack can be made substantially equal to that of the thin battery 202.

  However, even in this configuration, since the exterior frame fixed to the outer periphery of the thin battery is divided into two in the length direction, there is a drawback that it takes time and labor to manufacture and assemble the exterior frame.

That is, it is necessary to join the exterior frame divided into the top and bottom or the front and back by ultrasonic welding or the like in the battery pack processing step. For this reason, the number of processing steps increases, and a performance inspection process is required, leading to an increase in manufacturing cost due to the increase in the number of steps. As described above, the battery packs having the outer frame divided into parts have a problem that the number of parts is increased, the number of processes is large, and the manufacturing cost is increased.
JP 2004-273174 A

  The present invention has been developed for the purpose of solving such problems. A main object of the present invention is to provide a thin battery pack that can hold a thin battery with an outer frame at low cost.

The battery pack according to the first and third aspects of the present invention includes a thin battery 2 and an outer frame 1 that covers the outer periphery of the thin battery 2. The thin battery 2 has a rectangular shape in which the thickness of the battery is thinner than the width, and the first flat surface 2A and the second flat surface 2B located on both sides facing each other, and the first flat surface 2A and the second flat surface 2B. A terminal surface 2C for connecting the flat surface 2B and arranging the terminal group, an end surface 2D facing the terminal surface 2C, a first side surface 2E and a second side surface 2F for connecting the terminal surface 2C and the end surface 2D. And at least six sides.

  The exterior frame 1 has an opening 4 for exposing the first flat surface 2A and the second flat surface 2B of the thin battery 2, and the first side surface 2E and the second side surface 2F of the thin battery 2 are The side frame 6 that covers the terminal frame 7 that covers the terminal surface 2C, and the bottom frame 8 that covers the end surface 2D are integrally formed of plastic, and the side wall 6 is formed to be elastically deformable.

  Further, the terminal frame 7 of the outer frame 1 is integrally formed with an eave 7A that holds the terminal surface 2C side of the thin battery 2 in a fixed position, and the side wall 6 of the outer frame 1 is formed by the thin battery 2. The first projection 6A projecting toward the first flat surface 2A and the second projection 6B projecting toward the second flat surface 2B are provided on opposite side edges at different positions in the longitudinal direction. ing. In this thin battery 2, the thin battery 2 guides the end of the thin battery 2 on the terminal surface 2C side to the terminal frame 7, and elastically deforms the side wall 6 so that the thin battery is between the first protrusion 6A and the second protrusion 6B. 2, the outer frame 1 is attached to the outer periphery of the thin battery 2.

In the battery pack according to the second and fourth aspects of the present invention, the second protrusion 6B is made longer than the first protrusion 6A, a notch K is provided in a part of the second protrusion 6B, and the notch A first protrusion 6A is provided at a position facing the portion K. The first protrusion 6 </ b> A is disposed at a position closer to the bottom frame 8 than the terminal frame 7.

In the battery pack according to the fifth aspect of the present invention, the circuit board 10 that fixes the output terminal 9 is disposed between the terminal surface 2 </ b> C of the thin battery 2 and the terminal frame 7. The circuit board 10 is disposed inside the eaves 7 </ b> A of the terminal frame 7.

In the battery pack according to the sixth aspect of the present invention, the side surface of the thin battery 2 is formed into a curved surface protruding in a central projection. The contact surfaces of the protrusions 6 </ b> A and 6 </ b> B provided on the side frame 6 of the exterior frame 1 are formed in a curved shape along the curved surface of the side surface of the thin battery 2.

Furthermore, the battery pack according to the seventh aspect of the present invention is attached with a peel discriminating seal 12 that can be discriminated from being peeled across the thin battery 2 and the outer frame 1.

  In the battery pack of the present invention, the outer frame constituting the battery case is integrally formed of plastic, and the outer frame formed by dividing into a plurality of parts is conventionally joined by a method such as ultrasonic welding. There is no need, and the production cost can be reduced and mass production can be performed at low cost. In particular, by not dividing the exterior frame, the number of parts is reduced and a significant cost reduction is realized. Moreover, the exterior frame which is not divided | segmented has the characteristics which can make a tough structure, without a coupling | bond part being isolate | separated.

The battery pack according to another aspect of the present invention is characterized in that the thin battery can be smoothly inserted while the thin battery is securely held inside the exterior frame. Because the first protrusion is provided at a position closer to the bottom frame than the terminal frame, the side frame is elastically deformed and expanded while the terminal surface side of the thin battery is guided to the eaves of the terminal frame. This is because the thin battery can be guided to the side frame.

In addition, the battery pack according to another aspect of the present invention is characterized in that the output terminal can be arranged so as not to move firmly to a fixed position of the exterior frame. This is because the circuit board for fixing the output terminal is arranged inside the eaves of the terminal frame.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a battery pack for embodying the technical idea of the present invention, and the present invention does not specify the battery pack as follows. Moreover, the member shown by the claim is not what specifies the member of embodiment. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.

  3 is an exploded perspective view of the battery pack according to the embodiment of the present invention, FIG. 4 is a perspective view of the battery core 13 connecting the circuit board 10 to the thin battery 2, and FIG. FIG. 6 and FIG. 7 are cross-sectional views taken along the dashed line AA and BB shown in FIG. 5, respectively.

  The battery pack shown in these drawings includes a thin battery 2 and an outer frame 1 that covers the outer periphery of the thin battery 2. In the illustrated battery pack, a circuit board 10 is connected to a thin battery 2 via a substrate holder 11 to form a battery core 13, and the battery core 13 is placed inside the outer frame 1 and fixed.

The thin battery 2 is a secondary battery in which the thickness is thinner than the width and the outer periphery is substantially rectangular. The thin battery 2 is a rectangular battery whose thickness is smaller than the width, and the first flat surface 2A and the second flat surface 2B located on both surfaces facing each other, the first flat surface 2A, A terminal surface 2C for connecting the second flat surface 2B and arranging the terminal group, an end surface 2D facing the terminal surface 2C, a first side surface 2E for connecting the terminal surface 2C and the end surface 2D, and a second surface 2D. 6 side surfaces with the side surface 2F.
However, in this specification, the first side surface and the second side surface of the thin battery are surfaces located on both sides of the thin battery, and are a first flat surface, a second flat surface, a terminal surface, and an end surface. It means a surface that can be seen when viewed from a direction parallel to. Therefore, the first side surface and the second side surface do not necessarily have to be one plane, and may be curved surfaces, partially curved surfaces, or a combination of a plurality of planes. You can also

  The thin battery 2 is a lithium ion battery or a polymer battery. The polymer battery is a lithium polymer battery. However, the present invention does not specify the thin battery 2 as a lithium ion battery or a polymer battery. The thin battery 2 may be a battery other than these batteries, for example, a nickel-hydrogen battery or a nickel-cadmium battery.

  The exterior frame 1 is manufactured by integrally molding the whole with plastic. As the plastic, a plastic in which fibers such as glass fiber and carbon fiber are embedded and reinforced, for example, PPS (polyphenylene sulfite) is suitable. PPS has extremely excellent strength. PPS can be reinforced with fibers to improve impact strength. Furthermore, since PPS is excellent in flame retardancy, for example, when PPS is used as the material of the exterior frame 1, even if the plate thickness is reduced to 0.4 mm, the flame retardancy defined by the UL standard or the like Meet the criteria for sex. On the other hand, in polycarbonate, in order to satisfy this standard, a plate thickness of 0.8 mm or more is required. Therefore, PPS can make the exterior frame 1 thin while maintaining flame retardancy, and the size of the battery pack can be reduced accordingly. However, since the plastic of the exterior frame 1 can be a plastic such as polycarbonate, the plastic is not specified as PPS.

  The thin battery 2 is housed in the outer frame 1 in the state of the battery core 13. The battery core 13 includes a circuit board 10, a board holder 11, and a thin battery 2. The battery core 13 is obtained by connecting the circuit board 10 to the thin battery 2 via the substrate holder 11. The battery core 13 fixes the output terminal 9 to the circuit board 10. The output terminal 9 is exposed to the outside from the electrode window 14 provided in the exterior frame 1.

  The battery core 13 has a substrate holder 11 disposed between the circuit board 10 and the thin battery 2. The substrate holder 11 is formed by integrally molding an insulating material such as plastic. The circuit board 10 has an output terminal 9 fixed on the surface. The circuit board 10 is mounted with a battery protection circuit (not shown). The protection circuit is a circuit that protects the overcurrent of the thin battery 2 or a circuit that prevents the thin battery 2 from being overcharged or discharged. In the illustrated battery pack, the PTC that is the protective element 15 is connected to the circuit board 10 via the lead plate 16 as one connection lead. However, a protective element such as a PTC or a thermal fuse can be mounted on a circuit board, and both ends of the circuit board can be connected to a thin battery by a lead plate or the like. In addition, the battery pack can connect the circuit board to the thin battery by using the protective element as a temperature fuse instead of the PTC and using one connection lead as the temperature fuse.

  Further, the circuit board 10 is also provided with a test terminal 17. The test terminal 17 is an electrical terminal for confirming whether or not the battery pack operates normally after the battery pack is assembled. After the battery pack is assembled, the measuring needle is brought into contact with the test terminal 17 to confirm that the battery pack operates normally. After the test is completed, the test terminal 17 is blocked from being exposed to the outside by sticking a seal 18 on the test terminal 17 or the like.

  The substrate holder 11 is sandwiched between the circuit substrate 10 and the thin battery 2. The circuit board 10 is connected to one surface of the substrate holder 11, and the other surface is connected to the terminal surface 2 </ b> C of the thin battery 2. The board holder 11 is provided with a positioning wall 11A along one side edge on the side where the circuit board 10 is connected, and the circuit board 10 is arranged along the positioning wall 11A.

  In the illustrated battery pack, both ends of the circuit board 10 are connected to positive and negative electrodes of the thin battery 2 via lead plates 16 and 19. In the illustrated battery pack, one connection lead is connected as a protective element 15 to a convex electrode (not shown) provided on the end face 2D of the thin battery 2, and is further extended by a lead plate 16 and the other connection lead. Is connected to the electrode of the terminal surface 2C of the thin battery 2 as a lead plate 19. In the illustrated battery pack, one connection lead is used as the protective element 15, but both connection leads can be used as lead plates.

  The connection lead connected to the convex electrode needs to be insulated from the sealing plate of the thin battery 2. This is because the convex electrode and the sealing plate are different electrodes. The lithium ion secondary battery which is the thin battery 2 has a convex electrode as a negative electrode and a sealing plate and an outer can as a positive electrode. The outer can of the thin battery 2 can be a metal case. In the illustrated battery pack, the connection lead connected to the convex electrode serves as the protection element 15, and therefore the insulating plate 20 is disposed between the protection element 15 which is the connection lead connected to the convex electrode and the sealing plate. Thus, the connection lead and the sealing plate are insulated. The insulating plate 20 is bonded or fixed to the end surface 2D of the thin battery 2 via a double-sided adhesive tape to insulate the connection leads connected to the convex electrodes from the sealing plate. The connection lead is connected to the electrode of the thin battery 2 by resistance spot welding or laser welding. Further, resistance spot welding, laser welding, or soldering is used to connect to the circuit board 10.

  The circuit board 10 is connected to a fixed position of the board holder 11 with a fitting structure. The substrate holder 11 shown in the drawing is provided with a positioning wall 11A along one side edge to hold the circuit board 10 in a fixed position. The substrate holder 11 positions the lateral direction orthogonal to the longitudinal direction of the circuit board 10 by bringing the side surface of the circuit board 10 into contact with the inner surface of the positioning wall 11A. Further, the circuit board 10 is connected so as not to be detached from the board holder 11 via lead plates 16 and 19 connected to both ends.

  The circuit board 10 is connected to the thin battery 2 through the lead plates 16 and 19 in a state of being connected to a fixed position of the board holder 11. When the circuit board 10 is connected to the thin battery 2, the board holder 11 is sandwiched between the circuit board 10 and the thin battery 2 and is disposed at a fixed position. The battery core 13 connects the substrate holder 11 and the circuit board 10 to each other in a fixed position, and connects the circuit board 10 to the thin battery 2 via the lead plates 16 and 19. 11 and the thin battery 2 can be connected so that their relative positions do not deviate from each other.

  The entire outer frame 1 is formed of plastic. The exterior frame 1 is formed into a frame shape having an opening 4 that exposes the first flat surface 2A and the second flat surface 2B of the thin battery 2. In addition, the exterior frame 1 is made of a plastic material including a side frame 6 that covers the first side surface 2E and the second side surface 2F of the thin battery 2, a terminal frame 7 that covers the terminal surface 2C, and a bottom frame 8 that covers the end surface 2D. Thus, it is molded integrally. Further, the exterior frame 1 has a side wall 6 that is elastically deformable so that the thin battery 2 can be placed inside. The side frame 6 can be thinly molded and elastically deformed.

  Further, the outer frame 1 is provided with an eave 7 </ b> A integrally formed in the terminal frame 7 by fitting the end of the thin battery 2 on the terminal surface 2 </ b> C side and connecting it to a fixed position. In the illustrated battery pack, the battery core 13 is placed in the exterior frame 1. In this battery pack, the terminal surface 2 </ b> C side of the battery core 13 is guided inside the eaves 7 </ b> A of the terminal frame 7 to hold the battery core 13 in a fixed position on the exterior frame 1. That is, the substrate holder 11 of the battery core 13 is put inside the eaves 7 </ b> A, and the terminal surface 2 </ b> C side of the thin battery 2 is held at a fixed position via the substrate holder 11. Therefore, the eaves 7A of the terminal frame 7 do not necessarily need to hold a part of the thin battery 2 inside the eaves 7A. However, it goes without saying that a part of the thin battery 2 on the terminal surface 2C side can be put inside the eaves 7A of the terminal frame 7 and held.

  The exterior frame 1 shown in the figure has eaves 7 </ b> A protruding from both sides of the terminal frame 7. Further, the eaves 7A are provided with a fitting hole 21 and a fitting recess 22 for holding the substrate holder 11 in place. The exterior frame 1 shown in FIG. 3 is provided with a fitting hole 21 at both ends of the terminal frame 7 and a fitting recess 22 in the middle part. The fitting hole 21 is a slit that penetrates the eaves 7A, and the fitting recess 22 is provided so as to open to the side edge of the eaves 7A. The slit fitting hole 21 opens so as to extend in the longitudinal direction of the terminal frame 7.

  The substrate holder 11 is provided with a fitting projection 23 inserted into the fitting hole 21 and a fitting projection 24 guided to the fitting recess 22 in a state where the substrate holder 11 is guided to a fixed position of the exterior frame 1. Yes. The substrate holder 11 having this structure is inserted into the eaves 7 </ b> A in a state in which the fitting convex portion 24 is guided to the fitting concave portion 22, and can guide the fitting convex strip 23 to the fitting hole 21. That is, the fitting convex part 24 can be put into the fitting concave part 22, and this can be used as a guide to promptly guide the fitting convex line 23 into the fitting hole 21. In a state where the fitting protrusions 23 are inserted into the fitting holes 21, the board holder 11 is connected so as not to come out to a fixed position of the terminal frame 7.

  Furthermore, the exterior frame 1 is provided with a first projection 6A and a second projection 6B integrally formed on both sides thereof so as to connect the thin battery 2 so as not to be displaced inside the side wall 6. . The first protrusion 6A protrudes toward the first flat surface 2A of the thin battery 2, and the second protrusion 6B is provided so as to protrude toward the second flat surface 2B. The thin battery 2 is inserted between the first protrusion 6A and the second protrusion 6B protruding toward the flat surface of the thin battery 2. In this state, the thin battery 2 is held so as not to be displaced inside the side frame 6.

  Furthermore, the first protrusion 6A and the second protrusion 6B provided on both side edges of the side frame 6 are provided at different positions in the longitudinal direction. That is, the exterior frame 1 shown in the perspective view of FIG. 3 is formed so that the first protrusion 6A and the second protrusion 6B do not overlap in the vertical direction. In this figure, the first protrusion 6A is shorter than the second protrusion 6B and is provided at the upper edge of the side frames 6 on both sides. The second protrusion 6B provided along the lower edge of the side frame 6 is provided widely over almost the entire side surface of the opening 4 except for the portion where the first protrusion 6A is provided. The exterior frame 1 has a second protrusion 6B that is longer than the first protrusion 6A, and a notch K is provided in a part of the second protrusion 6B. A protrusion 6A is provided.

  6 and 7 are cross-sectional views of different portions of the side frame 6, as shown in FIG. FIG. 7 shows a portion where the first protrusion 6A is provided, and FIG. 6 is a cross-sectional view showing a portion where the second protrusion 6B is provided. As shown in these drawings, the first protrusion 6A and the second protrusion 6B are provided at different positions in the longitudinal direction of the side frame 6 and not overlapping each other. As described above, the exterior frame 1 in which the first protrusion 6A and the second protrusion 6B are provided at different positions can be mass-produced at low cost by using a mold having a simple structure. That is, the side frame 6 having protrusions at the same positions on both sides needs to have a complicated structure in order to remove the mold, but the exterior frame 1 of the side frame 6 having protrusions at different positions on both sides is The mold can be removed by pulling in the direction of the opening 4 on both sides. As a result, while the exterior frame 1 is integrally formed of plastic, the thin battery 2 can be held so as not to drop off by projecting a protrusion from the opening 4 to the side frame 6.

  Further, in the exterior frame 1 of FIGS. 3 and 5, the first protrusion 6 </ b> A is disposed at a position closer to the bottom frame 8 than the terminal frame 7. The exterior frame 1 can elastically deform the side frame 6 to smoothly guide the battery core 13 to the inside of the exterior frame 1. This is because the thin battery 2 can be guided to the inside of the side frame 6 by spreading the side frame 6 in a state where the substrate holder 11 side of the battery core 13 is guided between the eaves 7 </ b> A of the terminal frame 7.

  The thin battery 2 of FIG. 6 and FIG. 7 is formed in the curved surface which makes a side surface protrude in the center convexity. In order to hold the thin battery 2 in a fixed position, the side frame 6 of the exterior frame 1 has a contact surface of a protrusion that contacts the side surface of the thin battery 2 in a curved shape along the curved surface of the side surface of the thin battery 2. ing. The exterior frame 1 can be brought into close contact with the contact surface of the protrusion in a surface contact state with no gap on the side surface of the thin battery 2.

  In the battery pack described above, the circuit board 10 and the substrate holder 11 are connected to the thin battery 2 to form a battery core 13, and the battery core 13 is inserted into the outer frame 1, and then, as shown in FIG. And a peel discrimination seal 12 are affixed so as to straddle the outer frame 1. The peel discriminating seal 12 is a seal that makes it possible to discriminate once peeled off. For example, if it is peeled after sticking, a part of the glue on the sticker will remain on the sticking part and an "opened" character will appear, or a tamper-proof tape that cannot be re-peeled, What was cut | disconnected by can be used. Thereby, it can be confirmed by the peeling determination seal 12 that the battery pack has been disassembled, and the alteration of the battery pack by the end user can be determined.

  As described above, it is desirable that the battery pack in which the exterior frame 1 is an integrated type has a structure in which the battery core 13 can be easily fitted to the exterior frame 1 in consideration of assembly workability and the like. However, if the above structure is adopted, the end user can easily disassemble the battery pack and take out the battery core 13, which may cause problems such as deterioration of the reliability of the battery pack due to tampering. . For this reason, after fitting the battery core 13 to the exterior frame 1, the peeling discrimination seal 12 is pasted so that a trace remains when the battery pack is disassembled, and tampering or the like can be discriminated.

  After affixing the peel discriminating seal 12, an insulating sheet 3 such as a label is attached in a state where the battery core 13 is inserted in the outer frame 1, and the opening 4 of the outer frame 1 is closed. The insulating sheet 3 is bonded to the first flat surface 2A and the second flat surface 2B of the thin battery 2 and the side frame 6 of the exterior frame 1. In the illustrated battery pack, the insulating sheet 3 is bonded to the four sides of the exterior frame 1, and both side edges of the insulating sheet 3 are U-curved on both sides of the frame and bonded to the terminal frame 7 and the bottom frame 8. In this way, the insulating sheet 3 holds the battery core 13 inside the exterior frame 1.

  The insulating sheet 3 is a flexible plastic sheet or label. The insulating sheet 3 is bonded to the thin battery 2 and the exterior frame 1 through an adhesive, or is bonded through an adhesive layer.

It is a disassembled perspective view which shows the conventional battery pack. It is a disassembled perspective view which shows the other conventional battery pack. It is a disassembled perspective view which shows the battery pack which concerns on one Example of this invention. It is a perspective view which shows the battery core of the battery pack shown in FIG. FIG. 4 is a perspective view showing the battery pack shown in FIG. 3 with a thin battery placed in an exterior frame. FIG. 6 is a cross-sectional view of the battery pack shown in FIG. 5 taken along line AA. FIG. 6 is a cross-sectional view of the battery pack shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Exterior frame 2 ... Thin battery 2A ... 1st flat surface 2B ... 2nd flat surface
2C ... Terminal surface 2D ... End surface
2E ... 1st side surface 2F ... 2nd side surface 3 ... Insulating sheet 4 ... Opening part 6 ... Side frame 6A ... 1st protrusion 6B ... 2nd protrusion 7 ... Terminal frame 7A ... Eaves 8 ... Bottom frame 9 ... Output Terminal 10 ... Circuit board 11 ... Substrate holder 11A ... Positioning wall 12 ... Separation discrimination seal 13 ... Battery core 14 ... Electrode window 15 ... Protection element 16 ... Lead plate 17 ... Test terminal 18 ... Seal 19 ... Lead plate 20 ... Insulation Plate 21 ... Fitting hole 22 ... Fitting recess 23 ... Fitting protrusion 24 ... Fitting protrusion K ... Notch 101 ... Exterior frame 101A ... First case
101B ... Second case
101a ... Side case part
101b ... end case 102 ... thin battery 103 ... insulating sheet 104 ... opening 201 ... exterior frame 201A ... first case
201B ... Second case 202 ... Thin battery

Claims (7)

The battery is a rectangular thin battery having a thickness smaller than the width of the battery, and includes a first flat surface and a second flat surface located on both surfaces facing each other, and the first flat surface and the second flat surface. A thin battery having at least six surfaces including a terminal surface on which a terminal group is arranged, an end surface facing the terminal surface, and a first side surface and a second side surface connecting the terminal surface and the end surface; A battery pack comprising an outer frame covering the outer periphery of the thin battery,
A side frame having an opening for exposing the first flat surface and the second flat surface of the thin battery, and covering the first and second side surfaces of the thin battery; and a terminal surface The terminal frame that covers the bottom and the bottom frame that covers the end surface are integrally molded with plastic, and the side wall is molded to be elastically deformable.
Furthermore, the terminal frame of the exterior frame is integrally formed with an eave that holds the terminal surface side of the thin battery in place,
Furthermore, the side frame of the exterior frame has a first protrusion protruding toward the first flat surface of the thin battery and a second protrusion protruding toward the second flat surface at opposite side edges. Provided,
The terminal on the terminal surface side of the thin battery is guided to the terminal frame, the side wall is elastically deformed to guide the thin battery between the first protrusion and the second protrusion, and the outer frame is attached to the outer periphery of the thin battery. A battery pack that is designed to be attached to a battery pack. The battery pack according to claim 1 ,
A battery pack, wherein the first protrusion is disposed at a position closer to the bottom frame than the terminal frame. The battery pack according to claim 1 or 2,
  The first protrusion and the second protrusion are side edges facing each other and provided at different positions in the longitudinal direction,
A battery pack, wherein a notch is provided in a part of the second protrusion, and the first protrusion is provided at a position opposite to the notch. The battery pack according to any one of claims 1 to 3,
The battery pack, wherein the second protrusion is longer than the first protrusion. The battery pack according to claim 1 or 2,
Between the terminal surface of the thin battery and the terminal frame, a circuit board that fixes the output terminal is disposed,
A battery pack, wherein the circuit board is disposed inside the eaves of the terminal frame. The battery pack according to any one of claims 1 to 3,
The side surface of the thin battery is formed in a curved surface protruding in the center, and the contact surface of the protrusion provided on the side frame of the exterior frame facing the side surface is formed in a curved shape along the curved surface of the side surface of the thin battery. The battery pack characterized by becoming. The battery pack according to any one of claims 1 to 4,
A battery pack comprising a thin film battery and an exterior frame, and a peel discrimination seal capable of discriminating that the battery has been peeled off.

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