Battery device

Abstract

To provide a battery device capable of improving manufacturing efficiency.SOLUTION: A battery device 10 includes a battery module 11 and a terminal block 30. The battery module 11 has a structure in which a plurality of laminate cells 20 are stacked, and a positive terminal 22 provided on one of the adjacent laminate cells 20 is connected to a negative terminal 23 provided on the other. The terminal block 30 includes terminal portions 32B, 32C used for connecting the positive terminal 22 and the negative terminal 23, and is extended along the front end portion of the main body portion 21 of the laminate cell 20. The positive terminal 22 provided on one of the adjacent laminate cells 20 and the negative terminal 23 provided on the other are joined in an overlapping state, with the overlapping portion abutting the front surfaces of the terminal portions 32B, 32C.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a battery device.

Background Art

[0002] A laminated cell using a laminate film as an exterior material has been put into practical use (see Patent Document 1). Further, a battery device including a battery module having a structure in which a plurality of laminated cells are laminated and electrode terminals provided on one of two adjacent laminated cells are connected to electrode terminals provided on the other is also in practical use.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The electrode terminals of the laminated cell are formed in a thin plate shape from a low-rigidity metal material such as copper or aluminum. Since such electrode terminals are easily deformed, it is difficult to hold the electrode terminals in a predetermined shape suitable for the connection when connecting the electrode terminals to each other. Therefore, the work of positioning the electrode terminals becomes complicated, and there is a risk that the work related to the connection of the electrode terminals becomes complicated. Therefore, the manufacturing efficiency of a battery device configured with a plurality of laminated cells is likely to be low.

Means for Solving the Problems

[0005] A battery device for solving the above problems includes a battery module having a structure in which a plurality of laminated cells are laminated and electrode terminals provided on one of the adjacent laminated cells and electrode terminals provided on the other are connected. In the battery device, it has a terminal portion used for connecting the electrode terminals, and includes a terminal block extending along a specific outer edge portion which is a portion where the electrode terminals are provided at the outer edge portion of the laminated cell. The electrode terminal provided on one side and the electrode terminal provided on the other side are joined in a superposed state, and in a state where the superposed portion abuts on the outer surface of the terminal portion on the side far from the specific outer edge portion.

Brief Description of the Drawings

[0006]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0007] Hereinafter, an embodiment of the battery device will be described with reference to FIGS. 1 to 9. In the drawings, the X-axis among the mutually orthogonal XYZ axes represents the longitudinal direction X of the battery device 10, the Y-axis represents the width direction Y of the battery device 10, and the Z-axis represents the height direction Z of the battery device 10. In the following description, for the sake of convenience, one side in the longitudinal direction X is expressed as "front", the other side is expressed as "rear", one side in the width direction Y is expressed as "right", the other side is expressed as "left", one side in the height direction Z is expressed as "upper", and the other side is expressed as "lower".

[0008] As shown in FIGS. 2 and 3, the battery device 10 includes a battery module 11, a control unit 12, and a case 13. <Battery module 11> The battery module 11 has a plurality (seven in this embodiment) of laminated cells 20. As shown in FIG. 4, the laminated cell 20 has a main body portion 21, a positive electrode terminal 22, and a negative electrode terminal 23. The main body portion 21 is in the shape of a rectangular plate and constitutes a portion in which the positive electrode and the negative electrode are encapsulated with a laminated film. The positive electrode terminal 22 and the negative electrode terminal 23 are provided at the front end of the main body portion 21 with a space therebetween in the height direction Z. The positive electrode terminal 22 is formed in a thin plate shape by a metal material (for example, copper). The negative electrode terminal 23 is formed in a thin plate shape by a metal material (for example, aluminum). Four insertion holes 24 arranged at intervals in the height direction Z are provided at the tip portions of the positive electrode terminal 22 and the negative electrode terminal 23, respectively.

[0009] As shown in FIG. 3, the plurality of laminated cells 20 are laminated in the width direction Y. In the battery module 11 of this embodiment, the plurality of laminated cells 20 are connected in series. Specifically, the battery module 11 has a structure in which the positive electrode terminal 22 provided on one of two adjacent laminated cells 20 in the stacking direction is connected to the negative electrode terminal 23 provided on the other.

[0010] <Terminal block 30> The battery module 11 has a terminal block 30. The terminal block 30 extends along the front end portion of the main body 21 of the laminated cell 20. In the present embodiment, the front end portion of the main body 21 corresponds to a specific outer edge portion where electrode terminals, i.e., the positive electrode terminal 22 and the negative electrode terminal 23, are provided at the outer edge portion of the laminated cell 20. As shown in FIGS. 3 and 5, the terminal block 30 has, in order from the upper side, a first convex portion 31, a first terminal block portion 32, an intermediate base 33, a second terminal block portion 34, and a second convex portion 35.

[0011] <The first convex portion 31> The first convex portion 31 constitutes the upper end portion of the terminal block 30. The first convex portion 31 protrudes upward so as to have a stepped shape, a so-called convex shape, in which the central portion in the width direction Y protrudes upward as seen from the longitudinal direction X.

[0012] <The first terminal block portion 32> The first terminal block portion 32 constitutes a portion of the terminal block 30 that faces the electrode terminal disposed above among the two electrode terminals, i.e., the positive electrode terminal 22 and the negative electrode terminal 23, that each laminated cell 20 has.

[0013] As shown in FIG. 5, the first terminal block portion 32 has four terminal portions 32A, 32B, 32C, and 32D. Each of the terminal portions 32A to 32D extends in the height direction Z. Each of the terminal portions 32A to 32D extends in parallel with an interval in the width direction Y.

[0014] As shown in FIGS. 1 and 5, the front portions of the terminal portions 32A to 32D are constituted by a first terminal plate 301. The first terminal plate 301 is constituted by a rectangular metal plate. The first terminal plate 301 has four female screw portions 3011 arranged at intervals in the height direction Z. In the present embodiment, portions of the terminal block 30 other than the first terminal plate 301 are integrally formed of a hard synthetic resin material. And the first terminal plate 301 constituted by a metal plate is integrally formed with the portion constituted by the hard synthetic resin material in the first terminal block portion 32.

[0015] As shown in Fig. 5, the first terminal block 32 has a plurality (seven in this embodiment) of slits 303 extending in the height direction Z between the respective terminal portions 32A to 32D. Specifically, for each of the three terminal portions 32B, 32C, and 32D, a pair of slits 303 are provided so as to extend in parallel with the respective terminal portions 32B, 32C, and 32D interposed therebetween. Further, for the terminal portion 32A, one slit 303 extending along the terminal portion 32A is provided.

[0016] In this embodiment, the three terminal portions 32B to 32D are used for connecting the electrode terminals of two adjacent laminate cells 20, specifically, for connecting the positive electrode terminal 22 provided on one of the two adjacent laminate cells 20 and the negative electrode terminal 23 provided on the other.

[0017] <Electrode terminal fixing structure> Hereinafter, a connection structure for connecting the electrode terminals of the laminate cell 20 using the terminal portions 32B to 32D will be described with reference to Fig. 6.

[0018] Note that Fig. 6 shows the connection structure of the electrode terminals in the terminal portion 32B. In this embodiment, since the connection structures of the electrode terminals in the terminal portions 32B to 32D are the same, only the connection structure of the electrode terminals in the terminal portion 32B will be described here, and the description of the connection structures of the electrode terminals in the terminal portions 32C and 32D will be omitted.

[0019] As shown in Figs. 6(a) and 6(b), when connecting the electrode terminals, the positive electrode terminal 22 provided on one of the two adjacent laminate cells 20 is inserted into one of the pair of slits 303 (the right one in the figure) arranged so as to sandwich the terminal portion 32B. Further, the negative electrode terminal 23 provided on the other of the two adjacent laminate cells 20 is inserted into the other of the pair of slits 303 (the left one in the figure) arranged so as to sandwich the terminal portion 32B. These positive electrode terminal 22 and negative electrode terminal 23 are inserted until the front end of the main body portion 21 of each laminate cell 20 abuts against the rear end of the terminal block 30 (the state shown in Fig. 6(b)).

[0020] Thereafter, as shown in FIG. 6(c), the positive electrode terminal 22 inserted into one of the pair of slits 303, specifically the right slit 303, is bent following the inner surface of the slit 303 and the front surface of the terminal portion 32B.

[0021] Thereafter, as shown in FIG. 6(d), the negative electrode terminal 23 inserted into the other of the pair of slits 303, specifically the left slit 303, is bent following the inner surface of the slit 303 and the front surface of the terminal portion 32B. At this time, the negative electrode terminal 23 is superposed on the positive electrode terminal 22.

[0022] Thereafter, as shown in FIG. 6(e), the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 are fixed to the front surface of the terminal portion 32B by screw fastening. The second terminal plate 302 is used for this fixing. As shown in FIG. 3, the second terminal plate 302 is composed of a rectangular metal plate and has four insertion holes 3021 arranged at intervals in the height direction Z. When connecting the electrode terminals, the male screw member 16 is inserted into the insertion hole 3021 of the second terminal plate 302, the insertion hole 24 of the positive electrode terminal 22, and the insertion hole 24 of the negative electrode terminal 23, and is screwed into the female screw portion 3011 of the terminal portion 32B (specifically, the first terminal plate 301). Thereby, as shown in FIGS. 1 and 6(e), the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 are fixed to the terminal portion 32B in a state of being sandwiched between the first terminal plate 301 constituting the front portion of the terminal portion 32B and the second terminal plate 302.

[0023] In the present embodiment, the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 are in a state of being superposed on each other. Further, the superposed portion of the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 is in contact with the outer surface on the side far from the specific outer edge portion of the laminate cell 20 in the terminal portion 32B, that is, the front surface of the terminal portion 32B. And in that state, the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 are fixed to the terminal portion 32B by screw fastening.

[0024] In this embodiment, the positive electrode terminal 22 of the laminate cell 20 disposed at one end in the stacking direction, specifically the left end, is fixed to the terminal portion 32A. When performing this fixation, first, the positive electrode terminal 22 of the laminate cell 20 is inserted into a slit 303 extending along the terminal portion 32A. After that, the positive electrode terminal 22 in a state of being inserted through the slit 303 is bent following the inner surface of the slit 303 and the front surface of the terminal portion 32A. Then, the tip portion of the positive electrode terminal 22 is fixed to the front surface of the terminal portion 32A by screw fastening. Specifically, the male screw member 16 is screwed into the female screw portion 3011 of the terminal portion 32A in a state of being inserted through the insertion hole 3021 of the second terminal plate 302 and the insertion hole 24 of the positive electrode terminal 22.

[0025] Note that the second terminal plate 302 used for fixing the positive electrode terminal 22 to the terminal portion 32A extends to the fixing portion 33A of the intermediate base 33 (see FIG. 5). The fixing portion 33A will be described later.

[0026] <Intermediate base 33> As shown in FIG. 3, the intermediate base 33 of the terminal block 30 faces a portion sandwiched between the positive electrode terminal 22 and the negative electrode terminal 23 at the front end portion of the main body portion 21 of the laminate cell 20.

[0027] As shown in FIG. 5, the intermediate base 33 has three fixing portions 33A, 33B, and 33C. The three fixing portions 33A, 33B, and 33C are provided at intervals in the width direction Y. Each of the fixing portions 33A, 33B, and 33C has a square cross-sectional shape and protrudes forward. Each of the fixing portions 33A, 33B, and 33C has a female screw portion 331. The fixing portions 33A, 33B, and 33C are used for fixing the second terminal plate 302 for the terminal portion 32A, the relay substrate 122 (both will be described later), the second terminal plate 302 for the terminal portion 34H, the plus-side electric wire 14, and the minus-side electric wire 15.

[0028] <Second terminal block portion 34> As shown in FIG. 3, the second terminal block portion 34 of the terminal block 30 constitutes a portion facing the other of the two electrode terminals in each laminate cell 20 (specifically, the electrode terminal disposed on the lower side).

[0029] As shown in FIG. 5, the second terminal block portion 34 has four terminal portions 34E, 34F, 34G, and 34H. Each terminal portion 34E to 34H extends in the height direction Z. Each terminal portion 34E to 34H extends parallel to each other with an interval in the width direction Y. The front portion of each terminal portion 34E to 34H is constituted by the first terminal plate 301. In the present embodiment, the first terminal plate 301 constituted by a metal plate is integrally formed with a portion constituted by a hard synthetic resin material in each terminal portion 34E to 34H.

[0030] The second terminal block portion 34 has a plurality (seven in the present embodiment) of slits 303 extending in the longitudinal direction X between the terminal portions 34E to 34H. Specifically, for the three terminal portions 34E, 34F, and 34G, a pair of slits 303 are respectively provided so as to extend in parallel with the terminal portions 34E, 34F, and 34G interposed therebetween. Further, for the terminal portion 34H, one slit 303 extending along the terminal portion 34H is provided.

[0031] In the present embodiment, the three terminal portions 34E to 34G are used for connecting the electrode terminals of two adjacent laminate cells 20, specifically, connecting the positive electrode terminal 22 provided on one of the two adjacent laminate cells 20 and the negative electrode terminal 23 provided on the other.

[0032] <Electrode terminal fixing structure> The connection structure of the electrode terminals in the terminal portions 34E to 34G is the same as the connection structure of the electrode terminals in the terminal portions 32B to 32D described above (see FIG. 1). Specifically, the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 are fixed to the terminal portions 34E to 34G in a state of being sandwiched between the first terminal plate 301 and the second terminal plate 302 constituting the front portion of the terminal portions 34E to 34G.

[0033] In this embodiment, the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 are in a state of being overlapped with each other. Further, the overlapped portion of the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 is in contact with the outer surface on the side far from the specific outer edge portion of the laminated cell 20 in the terminal portions 34E to 34G, that is, the front surface of the terminal portions 34E to 34G. And in that state, the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 are fixed to the terminal portions 34E to 34G (specifically, the first terminal plate 301) by screw fastening.

[0034] The fixing structure of the electrode terminal in the terminal portion 34H is the same as the fixing structure of the electrode terminal in the terminal portion 32A described above (see FIG. 1). As shown in FIGS. 3 and 5, in this embodiment, the negative electrode terminal 23 of the laminated cell 20 arranged at the other end (right end) in the stacking direction is fixed to the terminal portion 34H. At the time of this fixing, first, the negative electrode terminal 23 of the laminated cell 20 is inserted into a slit 303 extending along the terminal portion 34H. Then, the negative electrode terminal 23 in the state of being inserted into the slit 303 is bent following the inner surface of the slit 303 and the outer surface of the terminal portion 34H. Then, the tip portion of the negative electrode terminal 23 is fixed to the front surface of the terminal portion 34H by screw fastening. More specifically, the male screw member 16 is screwed into the female screw portion 3011 of the terminal portion 34H (specifically, the first terminal plate 301) in a state of being inserted into the insertion hole 3021 of the second terminal plate 302 and the insertion hole 24 of the negative electrode terminal 23. In this embodiment, the second terminal plate 302 used for fixing the negative electrode terminal 23 to the terminal portion 34H extends to the fixing portion 33C of the intermediate base 33.

[0035] <Second convex portion 35> The second convex portion 35 constitutes the lower end portion of the terminal block 30. The second convex portion 35 projects downward so as to form a rectangular tubular shape. The second convex portions 35 are provided one by one at both ends in the width direction Y at the lower part of the terminal block 30.

[0036] <Holder 40> As shown in FIGS. 3 and 7, the battery module 11 has a holder 40. The holder 40 is for holding the rear portions of a plurality of laminated cells 20. The holder 40 has a holder body 41 and a third convex portion 43.

[0037] The holder body 41 has a rectangular tube shape formed by an upper wall 44, a pair of side walls 45, and a lower wall 46. The upper wall 44 extends forward more than the pair of side walls 45 and the lower wall 46. In the present embodiment, the holder 40 is assembled inside the case 13 such that the rear portions of a plurality of laminated cells 20 are inserted into the inside of the holder body 41.

[0038] The third convex portion 43 is provided at the rear end of the upper wall 44. The third convex portion 43 protrudes upward from the upper surface of the upper wall 44 so as to have a convex shape when viewed from the longitudinal direction X. <Control unit 12> The control unit 12 has a battery management system (hereinafter, BMS 121) and a relay board 122.

[0039] The BMS 121 is a device for monitoring and managing the state of the battery module 11. The BMS 121 is connected to each part of the battery device 10, such as the relay board 122 and each terminal part 32A to 32D, 34E to 34H of the terminal block 30. The BMS 121 is fixed to the upper surface of the upper wall 44 of the holder 40.

[0040] The relay board 122 is a switching device for switching between a state in which power supply from the battery device 10 to an external device is possible and a state in which the same power supply is impossible. The relay board 122 is fixed to the fixing parts 33A to 33C of the terminal block 30.

[0041] In this embodiment, the fixing portion 33A of the terminal block 30 is fixed by screw fastening in a state where the other end of the second terminal plate 302 having one end fixed to the terminal portion 32A and the relay substrate 122 are overlapped. Further, the fixing portion 33B of the terminal block 30 is fixed by screw fastening in a state where the relay substrate 122 and one end of the positive-side electric wire 14 are overlapped. The fixing portion 33C of the terminal block 30 is fixed by screw fastening in a state where the other end of the second terminal plate 302 having one end fixed to the terminal portion 34H, the relay substrate 122, and one end of the negative-side electric wire 15 are overlapped.

[0042] As shown in FIG. 2, in this embodiment, the positive-side electric wire 14 and the negative-side electric wire 15 extend from the fixing portions 33B and 33C of the terminal block 30 to the outside of the case 13. The positive-side electric wire 14 and the negative-side electric wire 15 are for connecting the battery device 10 and an external device.

[0043] <Case 13> As shown in FIGS. 2 and 7, the case 13 constitutes an exterior member of the battery device 10. The case 13 has a rectangular box shape with an outer surface forming a substantially rectangular parallelepiped. The battery module 11 and the control unit 12 are housed in the case 13. The case 13 has a cover portion 50 and a base portion 60.

[0044] <Cover portion 50> As shown in FIGS. 7 and 8, the cover portion 50 has a rectangular tube-shaped peripheral wall 51 and a rectangular plate-shaped top wall 52 that closes the upper opening of the peripheral wall 51. Inside the cover portion 50, specifically, on the inner surface of the peripheral wall 51, four fixing portions 53 are provided. The fixing portions 53 are provided at the four corners of the lower opening of the cover portion 50. Each fixing portion 53 has a female screw portion 531. The four fixing portions 53 are used for fixing the base portion 60 to the case 13.

[0045] Inside the cover portion 50, specifically, in the front portion on the lower surface of the top wall 52, a first recess 54 having a rectangular cross-section is formed. Specifically, a first ridge 55 extending in a rectangular shape is provided in the front portion on the lower surface of the top wall 52. The portion surrounded by the first ridge 55 constitutes the first recess 54. This first recess 54 has substantially the same shape as the upper end portion of the first convex portion 31 of the terminal block 30.

[0046] Also, inside the cover portion 50, specifically, in the rear portion on the lower surface of the top wall 52, a third recess 56 having a rectangular cross-section is formed. Specifically, a third ridge 57 extending in a rectangular shape is provided in the rear portion on the lower surface of the top wall 52. The portion surrounded by the third ridge 57 constitutes the third recess 56. This third recess 56 has substantially the same shape as the upper end portion of the third convex portion 43 of the holder 40.

[0047] <Base portion 60> As shown in FIGS. 7 and 9, the base portion 60 has a rectangular plate shape. The base portion 60 has a shape that closes the lower opening of the cover portion 50. Through holes 61 penetrating the base portion 60 in the height direction Z are provided at the four corners of the base portion 60. These through holes 61 are used when fixing the base portion 60 to the cover portion 50. A second recess 62 having a rectangular cross-section is provided in the front portion on the upper surface of the base portion 60. The second recess 62 has a rectangular cross-section into which the lower end portions of the two second convex portions 35 of the terminal block 30 are fitted. A fourth recess 64 having a rectangular cross-section is provided in the rear portion on the upper surface of the base portion 60. This fourth recess 64 has a shape into which the lower end portion of the holder 40 is fitted.

[0048] <Holding structure of the battery module 11 inside the case 13> As shown in FIGS. 2, 3, and 7, in the present embodiment, the terminal block 30 and the holder 40 are supported by the inner surface of the case 13 so that the battery module 11 does not contact the inner surface of the case 13 with the battery module 11 sandwiched therebetween.

[0049] When assembling the battery module 11 into the case 13, the battery module 11 is inserted into the cover portion 50. At this time, the first convex portion 31 on the upper part of the terminal block 30 is fitted into the first concave portion 54 on the top wall 52 of the cover portion 50, and the third convex portion 43 on the upper part of the holder 40 is fitted into the third concave portion 56 on the top wall 52 of the cover portion 50.

[0050] In this embodiment, prior to the insertion of the battery module 11 into the cover portion 50, one end of the positive-side electric wire 14 and the negative-side electric wire 15 is connected to the battery module 11, and the other ends of these electric wires 14, 15 are drawn out from the inside to the outside of the cover portion 50.

[0051] Also, when assembling the battery module 11 into the case 13, with a seal member 131 sandwiched between the cover portion 50 and the base portion 60, the base portion 60 is attached to the cover portion 50 so as to close the lower opening of the cover portion 50. At this time, the second convex portion 35 on the lower part of the terminal block 30 is fitted into the second concave portion 62 on the upper surface of the base portion 60, and the lower end portion of the holder 40 is fitted into the fourth concave portion 64 on the upper surface of the base portion 60. And in this state, the base portion 60 is fixed to the cover portion 50 by screw fastening. Specifically, the male screw member 16 is screwed into the female screw portion 531 of the fixing portion 53 of the cover portion 50 in a state of being inserted through the through hole 61 of the base portion 60.

[0052] In this embodiment, the battery module 11 is supported by the inner surface of the case 13 at four locations: the first convex portion 31 on the upper part of the terminal block 30, the second convex portion 35 on the lower part of the terminal block 30, the third convex portion 43 on the upper part of the holder 40, and the lower end portion of the holder 40. In this embodiment, in this state, the shapes of each part of the battery device 10, specifically, the terminal block 30, the holder 40, the cover portion 50, and the base portion 60, are determined so that the plurality of laminated cells 20 do not contact the inner surface of the case 13.

[0053] <Function and Effect> The operation and effect of this embodiment will be described. (1) The battery device 10 includes a battery module 11 and a terminal block 30. The battery module 11 has a structure in which a plurality of laminated cells 20 are laminated, and a positive electrode terminal 22 provided on one of the adjacent laminated cells 20 and a negative electrode terminal 23 provided on the other are connected. The terminal block 30 has terminal portions 32B to 32D and 34E to 34G that are used for connecting the positive electrode terminal 22 and the negative electrode terminal 23, and extends along the front end portion of the main body portion 21 of the laminated cell 20. The positive electrode terminal 22 provided on one of the adjacent laminated cells 20 and the negative electrode terminal 23 provided on the other are joined in a state where they are overlapped and the overlapped portion is in contact with the front surfaces of the terminal portions 32B to 32D and 34E to 34G.

[0054] According to the above configuration, the terminals 22 and 23 can be firmly held while being positioned by an easy operation of pressing the positive electrode terminal 22 of one of the adjacent laminated cells 20 and the negative electrode terminal 23 of the other against the front surfaces of the terminal portions 32B to 32D and 34E to 34G in an overlapped state. And in this state, the positive electrode terminal 22 and the negative electrode terminal 23 can be joined to each other. Thus, since the operation of connecting the positive electrode terminal 22 and the negative electrode terminal 23 can be easily performed, the manufacturing efficiency of the battery device 10 can be improved.

[0055] (2) The terminal block 30 is provided with a pair of slits 303 extending along the front end portion of the main body portion 21 of the laminated cell 20 so as to sandwich the terminal portions 32B to 32D and 34E to 34G for each of the terminal portions 32B to 32D and 34E to 34G. The positive electrode terminal 22 provided on one of the adjacent laminated cells 20 and the negative electrode terminal 23 provided on the other are respectively inserted into the pair of slits 303. The tip portions of the positive electrode terminal 22 and the negative electrode terminal 23 are joined in a state where they are bent to the side of the terminal portions 32B to 32D and 34E to 34G so as to be along the inner surfaces of the slits 303 and the outer surfaces of the terminal portions 32B to 32D and 34E to 34G, and in a state where they are overlapped with each other.

[0056] According to the above configuration, the positive electrode terminal 22 and the negative electrode terminal 23 can be inserted into the slit 303 of the terminal block 30 and bent following the inner surface of the slit 303 and the outer surfaces of the terminal portions 32B to 32D and 34E to 34G, so that the positioning of the terminals 22 and 23 can be performed by such a simple operation. Thereby, the manufacturing efficiency of the battery device 10 can be improved.

[0057] (3) The battery device 10 includes a relay board 122 that switches between a state in which power supply to an external device is possible and a state in which the same power supply is impossible. The relay board 122 is fixed to the terminal block 30.

[0058] According to the above configuration, the terminal block 30 used for connecting the positive electrode terminal 22 and the negative electrode terminal 23 of the laminate cell 20 can also be used as a fixing base for fixing the relay board 122. Therefore, the battery device 10 can be made to have a simpler structure as compared with the case where a fixing base for the relay board 122 is provided separately from the terminal block 30. Further, the relay board 122 can be disposed in the vicinity of the electrode terminals to be connected thereto, specifically, the positive electrode terminal 22 and the negative electrode terminal 23. Therefore, the connection circuit connecting the relay board 122 and the electrode terminals can be collectively disposed in the vicinity of the same electrode terminals. Therefore, according to the above configuration, even though the relay board 122 is provided, the increase in size of the battery device 10 can be suppressed.

[0059] (4) The battery device 10 includes a holder 40 that holds the rear portions of the plurality of laminate cells 20 and a BMS 121 that manages the state of the battery module 11. The BMS 121 is fixed to the holder 40.

[0060] According to the above configuration, the holder 40 that holds the battery module 11 can also be used as a fixing base for fixing the BMS 121. Therefore, even though the holder 40 and the BMS 121 are provided, the battery device 10 can be made to have a simpler structure as compared with the case where a fixing base for the BMS 121 is provided separately from the holder 40.

[0061] (5) The battery device 10 includes a case 13 that constitutes an exterior member, a terminal block 30, and a holder 40. The terminal block 30 and the holder 40 are supported on the inner surface of the case 13 in a state where the battery module 11 is sandwiched therebetween so that the battery module 11 does not contact the inner surface of the case 13.

[0062] According to the above configuration, by using the terminal block 30 for connecting the electrode terminals and the holder 40 for holding the battery module 11, the battery module 11 can be accommodated in the case 13 in a state where the battery module 11 does not contact the inner surface of the case 13.

[0063] <Modification Example> Note that the above embodiment can be implemented with the following modifications. The above embodiment and the following modification examples can be implemented in combination with each other within a technically non - conflicting range.

[0064] · The positive electrode terminal 22 provided on one of the adjacent laminated cells 20 and the negative electrode terminal 23 provided on the other may be inserted into the same slit 303 and fixed to the same terminal portions 32B - 32D, 34E - 34G. In this case, one of the pair of slits 303 provided corresponding to each of the terminal portions 32B - 32D, 34E - 34G can be omitted.

[0065] · Instead of configuring the front portions of the terminal portions 32A - 32D, 34E - 34H with the first terminal plate 301 formed of a metal plate, they may be configured with portions formed of a hard synthetic resin material. In this case, it is also possible to integrally mold the entire terminal block 30 including the front portions of the terminal portions 32A - 32D, 34E - 34H with a hard synthetic resin material.

[0066] · The tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 may be fixed to the front surface of the terminal portions 32B - 32D, 34E - 34G without using the second terminal plate 302. · In the terminal portions 32B to 32D and 34E to 34G, in addition to joining the tip portion of the positive electrode terminal 22 and the tip portion of the negative electrode terminal 23 by screw fastening, they can also be joined by welding or ultrasonic bonding.

[0067] · The BMS 121 may be fixed to a part other than the holder 40, such as being fixed to the base portion 60 or a dedicated fixing base. · The battery device 10 according to the above embodiment can also be applied to a battery device not provided with the BMS 121.

[0068] · Instead of the relay board 122, a changeover switch or a circuit breaker may be fixed to the terminal block 30. In this case, the changeover switch or the circuit breaker corresponds to a switching device that switches between a state in which power supply to an external device is possible and a state in which the same power supply is impossible.

[0069] · The switching device may be fixed to a part other than the terminal block 30, such as being fixed to the base portion 60 or a dedicated fixing base. · The battery device 10 according to the above embodiment can also be applied to a battery device not provided with the switching device.

[0070] · The battery device 10 according to the above embodiment can also be applied to a battery device in which a plurality of laminated cells 20 are connected in parallel. <Supplementary Note> Describe the technical idea that can be grasped from the above embodiment and the modification examples.

[0071] In a battery device including a battery module having a structure in which a plurality of laminated cells are laminated and electrode terminals provided on one of the adjacent laminated cells and electrode terminals provided on the other are connected, the battery device includes a terminal portion used for connecting the electrode terminals, and a terminal block extending along a specific outer edge portion which is a portion where the electrode terminals are provided at the outer edge portion of the laminated cell. The electrode terminal provided on one side and the electrode terminal provided on the other side are joined in a state where they are overlapped and the overlapped portion is in contact with the outer surface on the side far from the specific outer edge portion in the terminal portion.

[0072] [Appendix 2] The terminal block has a pair of slits extending along the specific outer edge portion so as to sandwich the terminal portion therebetween. The electrode terminal provided on one side and the electrode terminal provided on the other side are respectively inserted into the pair of slits. The tip portions of the two electrode terminals respectively inserted into the pair of slits are joined in a state where each is bent toward the side of the terminal portion along the inner surface of the slit and the outer surface of the terminal portion and they are overlapped with each other. The battery device according to [Appendix 1].

[0073] [Appendix 3] The battery device includes a switching device for switching between a state in which power supply to an external device is possible and a state in which the power supply is impossible. The switching device is fixed to the terminal block. The battery device according to [Appendix 1] or [Appendix 2].

[0074] [Appendix 4] The battery device includes a holder for holding the battery module and a battery management system for managing the state of the battery module. The battery management system is fixed to the holder. The battery device according to any one of [Appendix 1] to [Appendix 3].

[0075] [Appendix 5] A battery device comprising a case constituting an exterior member and a holder for holding the battery module, wherein the holder and the terminal block are supported on the inner surface of the case with the battery module sandwiched therebetween so that the battery module does not contact the inner surface of the case, the battery device according to any one of [Appendix 1] to [Appendix 4].

Description of Reference Numerals

[0076] 10…Battery device 11…Battery module 12…Control unit 121…Battery management system (BMS) 122…Relay board 13…Case 131…Sealing member 14…Positive side wire 15…Negative side wire 16…Male screw member 20…Laminated cell 21…Main body portion 22…Positive electrode terminal 23…Negative electrode terminal 24, 3021…Insertion hole 30…Terminal block 301…First terminal plate 3011, 331, 531…Female screw portion 302…Second terminal plate 303…Slit 31…First convex portion 32…First terminal block portion 32A, 32B, 32C, 32D, 34E, 34F, 34G, 34H…Terminal portion 33…Intermediate base 33A, 33B, 33C…Fixing portion 34…Second terminal block portion 35…Second convex portion 40…Holder 41…Holder main body 43…Third convex portion 44…Upper wall 45…Side wall 46…Lower wall 50…Cover portion 51…Peripheral wall 52… Celestial Wall 53… Fixed Part 54… First Concave Part 55… First Ridge 56… Third Concave Part 57… Third Ridge 60… Base Part 61… Through-Hole 62… Second Concave Part 64… Fourth Concave Part

Claims

1. A battery device comprising a battery module having a structure in which a plurality of laminated cells are laminated and electrode terminals provided on one of the adjacent laminated cells are connected to electrode terminals provided on the other, comprising a terminal block having a terminal portion used for connection of the electrode terminals and extending along a specific outer edge portion which is a portion where the electrode terminals are provided at the outer edge portion of the laminated cell, wherein the electrode terminal provided on one side and the electrode terminal provided on the other side are joined in a state of being overlapped and in a state where the overlapped portion is in contact with the outer surface on the side far from the specific outer edge portion in the terminal portion. Battery device.

2. The terminal block has a pair of slits extending along the specific outer edge portion so as to sandwich the terminal portion therebetween, the pair of slits are respectively inserted with the electrode terminal provided on one side and the electrode terminal provided on the other side, the tip portions of the two electrode terminals respectively inserted into the pair of slits are joined in a state of being bent to the side of the same terminal portion along the inner surface of the slit and the outer surface of the terminal portion and in a state of being overlapped with each other. The battery device according to claim 1.

3. Comprising a switching device for switching between a state in which power supply to an external device is possible and a state in which the same power supply is impossible, the switching device is fixed to the terminal block. The battery device according to claim 1 or 2.

4. Comprising a holder for holding the battery module and a battery management system for managing the state of the battery module, the battery management system is fixed to the holder. The battery device according to claim 1 or 2.

5. Comprising a case constituting an exterior member and a holder for holding the battery module, the holder and the terminal block are supported on the inner surface of the case in a state of sandwiching the battery module so that the battery module does not contact the inner surface of the case. The battery device according to claim 1 or 2.

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