JP2018092872A - Battery pack and battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a battery pack with less inconvenience, having a novel configuration related to a terminal member, and a battery module.SOLUTION: A battery pack of an embodiment includes, for example, a housing, a plurality of battery cells, a fixed part, and a terminal member. The plurality of battery cells are received in the housing and electrically connected to each other. The fixed part has three surfaces which are the outside of the housing and face directions intersecting to each other, and three coupling parts which are provided to the three surfaces, respectively, and each of which can be mechanically coupled to a coupler, the fixed part being provided to the housing. The terminal member is electrically connected to a conductive member fixed to the fixed part by the coupler that is coupled to any one of the three coupling parts, the terminal member being electrically connected to the battery cells.SELECTED DRAWING: Figure 4

Description

  Embodiments described herein relate generally to an assembled battery and a battery module.

  Conventionally, for example, a plurality of battery cells, a terminal member connected to the plurality of battery cells, and a terminal block supporting the terminal member are provided, and the terminal member is electrically connected to the external conductive member fixed to the terminal member. An assembled battery connected to the battery is known.

JP 2013-20841 A

  However, in the related art, since the conductive member is attached to the terminal member in one position, the degree of freedom in arranging the conductive member and the assembled battery connected to the conductive member is small. Therefore, for example, it is preferable to obtain an assembled battery and a battery module with a new configuration related to the terminal member and with less inconvenience.

  The assembled battery of the embodiment includes, for example, a housing, a plurality of battery cells, a fixing unit, and a terminal member. The plurality of battery cells are housed in the housing and electrically connected to each other. The fixing portion is provided on each of the three surfaces facing the direction intersecting with each other on the outside of the housing, and each of the three surfaces can be mechanically coupled to a coupler. Two coupling portions, and provided in the casing. The terminal member is electrically connected to the conductive member fixed to the fixing portion by the coupler coupled to one of the three coupling portions, and is electrically connected to the battery cell.

FIG. 1 is a schematic and exemplary perspective view of the assembled battery according to the first embodiment, showing a state where cables are connected. FIG. 2 is a schematic and exemplary perspective view of the battery pack according to the first embodiment. FIG. 3 is a schematic and exemplary perspective view of the assembled battery of the first embodiment, and is a view seen from a direction different from FIG. 2. FIG. 4 is a schematic and exemplary exploded perspective view of the battery pack according to the first embodiment. FIG. 5 is a schematic and exemplary perspective view of the battery pack according to the first embodiment, showing a state where a cover is removed. FIG. 6 is a schematic and exemplary plan view of the assembled battery according to the first embodiment, showing a state where a cover is removed. FIG. 7 is a schematic and exemplary front view of the assembled battery according to the first embodiment, showing a state where a cover is removed. FIG. 8 is a schematic and exemplary rear view of the assembled battery according to the first embodiment, showing a state where a cover is removed. FIG. 9 is a schematic and exemplary side view of the battery pack according to the first embodiment. FIG. 10 is another schematic side view of the assembled battery according to the first embodiment. FIG. 11 is a schematic and exemplary perspective view of the assembled battery according to the first embodiment, and shows a state where a cover and a terminal member are removed. FIG. 12 is a schematic and exemplary perspective view of the assembled battery according to the first embodiment, and shows a state where a cover and a circuit board are removed. FIG. 13 is a schematic and exemplary rear view of the assembled battery according to the first embodiment, showing a state where a cover and a circuit board are removed. FIG. 14 is a schematic and exemplary perspective view of a portion including a fixing portion of the assembled battery according to the first embodiment. FIG. 15 is a schematic and exemplary perspective view of a portion including a fixing portion and a terminal member of the assembled battery according to the first embodiment. FIG. 16 is a schematic and exemplary perspective view of a positive electrode terminal member of the battery pack according to the first embodiment. FIG. 17 is a schematic and exemplary perspective view of the positive electrode terminal member of the battery pack according to the first embodiment, as viewed from a direction different from FIG. 16. FIG. 18 is a schematic and exemplary perspective view of the negative electrode terminal member of the battery pack according to the first embodiment. FIG. 19 is a schematic and exemplary perspective view of the negative electrode terminal member of the battery pack according to the first embodiment, as viewed from a direction different from FIG. 18. FIG. 20 is a schematic and exemplary perspective view of an assembled battery to which another example cover of the first embodiment is attached. FIG. 21 is a schematic and exemplary perspective view of an assembled battery to which a cover according to another example of the first embodiment is attached, and is a view seen from a direction different from FIG. FIG. 22 is a schematic and exemplary front view of an assembled battery to which a cover of another example of the first embodiment is attached. FIG. 23 is a schematic and exemplary perspective view of the battery module of the second embodiment. FIG. 24 is a schematic and exemplary perspective view of a part of the battery module of the second embodiment. FIG. 25 is a schematic and exemplary perspective view of the battery module of the third embodiment. FIG. 26 is a schematic and exemplary perspective view of a part of the battery module of the third embodiment. FIG. 27 is a schematic and exemplary perspective view of the lower assembled battery according to the third embodiment. FIG. 28 is a schematic and exemplary perspective view of the assembled battery according to the fourth embodiment, showing a state where the assembled battery is attached to a support member. FIG. 29 is a schematic and exemplary plan view of the assembled battery of the fourth embodiment, and shows a state where it is attached to a support member. FIG. 30 is a schematic and exemplary side view of the assembled battery of the fourth embodiment.

  Hereinafter, exemplary embodiments of the present invention are disclosed. The configuration of the embodiment shown below, and the operation and result (effect) brought about by the configuration are examples.

  Moreover, the same component is contained in several embodiment disclosed below. Therefore, below, the same code | symbol is provided to those similar components, and the overlapping description is abbreviate | omitted. In the following drawings, directions are defined for convenience. The X direction, the Y direction, and the Z direction are orthogonal to each other. Moreover, in this specification, the ordinal number is given for convenience in order to distinguish parts, parts, and the like, and does not indicate priority or order.

<First Embodiment>
1-4, the assembled battery 1 includes, for example, a housing 11, a plurality of battery cells 12, a plurality of conductive members 13, a positive electrode terminal member 14A, a negative electrode terminal member 14B, and a circuit board. 17. Hereinafter, the terminal member 14 may be used as a general term for the positive terminal member 14A and the negative terminal member 14B. The battery cell 12, the conductive member 13, the terminal member 14, and the circuit board 17 are accommodated in the housing 11. The plurality of battery cells 12 are electrically connected to each other by a plurality of conductive members 13. The electric power of the plurality of battery cells 12, that is, the electric power of the assembled battery 1 can be output to the conductive member 100 (connecting member) outside the assembled battery 1 via the terminal member 14. The assembled battery 1 is also referred to as a battery device. The shape of the conductive member 100 is not limited to the shape shown in FIG.

  The battery cell 12 is configured as, for example, a lithium ion secondary battery. The battery cell 12 may be another battery such as a nickel metal hydride battery, a nickel cadmium battery, or a lead storage battery. The battery cell 12 is also referred to as a single battery or a battery.

  As shown in FIG. 4, the battery cell 12 is configured in a flattened rectangular parallelepiped shape that is thin in one direction (for example, the X direction). The battery cell 12 includes a housing 21, a positive terminal portion 22 </ b> A, a negative terminal portion 22 </ b> B, and a valve portion 24. In the housing 21, an electrode body (not shown) and an electrolytic solution are accommodated. As an example, the electrode body can be formed by winding a positive electrode sheet and a negative electrode sheet, which are power generation elements, spirally through a separator. In addition, as an example, the electrode body can be formed by laminating a positive electrode sheet and a negative electrode sheet via a separator. The positive electrode terminal portion 22A and the negative electrode terminal portion 22B are connected to the positive electrode sheet and the negative electrode sheet of the electrode body, respectively. Hereinafter, the electrode terminal portion 22 may be used as a general term for the positive electrode terminal portion 22A and the negative electrode terminal portion 22B.

  As an example, the housing 21 is configured in a flat rectangular parallelepiped shape that is thin in one direction (for example, the X direction). The casing 21 is made of a metal material (for example, aluminum, aluminum alloy, stainless steel, etc.) or a synthetic resin material. The housing | casing 21 is comprised by combining the container 21a and the cover body 21b. The container 21a is formed in a substantially rectangular parallelepiped box shape having an open upper part, and the electrode body and the electrolytic solution are housed in the container 21a. The lid 21b closes the opened upper part of the container 21a. The housing | casing 21 is also called a container.

  The positive terminal portion 22A and the negative terminal portion 22B are provided on the lid body 21b and protrude from the outer surface of the lid body 21b. The positive electrode terminal portion 22A and the negative electrode terminal portion 22B are arranged at an interval in the Y direction, that is, the longitudinal direction of the lid body 21b. The positive terminal portion 22A and the negative terminal portion 22B are each made of a conductive material.

  The valve part 24 is provided between the positive terminal part 22A and the negative terminal part 22B in the lid 21b. The valve unit 24 is opened when the pressure in the housing 21 becomes higher than the threshold, and reduces the pressure in the housing 21.

  The plurality of battery cells 12 are arranged, for example, in a line in the housing 11. The plurality of battery cells 12 are arranged so that the outer surface of the lid 21b faces the same direction (for example, the Z direction), and the longitudinal direction of the lid 21b is along the same direction (for example, the Y direction). Is arranged. The plurality of battery cells 12 are electrically connected in series or in parallel (in series as an example) by a plurality of conductive members 13. The conductive member 13 is made of a conductive material such as aluminum. The conductive member 13 is also referred to as a bus bar, an inter-cell bus bar, a connection member, or a coupling member.

  The casing 11 has a rectangular parallelepiped appearance that is long in one direction (X direction). The housing 11 includes a bottom wall portion 11a, end wall portions 11b and 11c, side wall portions 11d and 11e, a top wall portion 11f, an intermediate wall portion 11g (see FIG. 12), a partition wall portion 11h (see FIG. 4), and the like. It has a plurality of walls (walls). The housing 11 is also referred to as a case or a container.

  The bottom wall portion 11a is formed in a quadrangular (for example, rectangular) plate shape. The bottom wall portion 11a extends along the XY plane. The outer surface 11m (see FIG. 3) of the bottom wall portion 11a is also referred to as a bottom surface or a lower surface.

  The end wall portions 11b and 11c are formed in a quadrangular (for example, rectangular) plate shape, and are connected to the end portion in the longitudinal direction (X direction) of the bottom wall portion 11a. Further, the end wall portions 11b and 11c extend along a direction intersecting with the bottom wall portion 11a (an orthogonal direction, for example, a YZ plane). The end wall portions 11b and 11c are provided substantially parallel to each other with an interval in the longitudinal direction (X direction) of the bottom wall portion 11a. Each outer surface 11m (refer FIG. 3) of the end wall parts 11b and 11c is also called a short side surface.

  The side wall portions 11d and 11e are formed in a quadrangular (for example, rectangular) plate shape, and are connected to an end portion in the short side direction (Y direction) of the bottom wall portion 11a. Further, the side walls 11d and 11e extend along a direction intersecting with the bottom wall 11a (as an example, a direction orthogonal to the XZ plane). The side wall parts 11d and 11e are provided substantially parallel to each other with an interval in the short direction (Y direction) of the bottom wall part 11a. The side wall portions 11d and 11e are connected to the adjacent end wall portions 11b and 11c. The outer surface 11m (refer FIG. 3) of the side wall parts 11d and 11e is also called a long side surface.

  The top wall portion 11f is formed in a quadrangular (for example, rectangular) plate shape. The top wall portion 11f is connected to the end portions of the end wall portions 11b and 11c and the side wall portions 11d and 11e opposite to the bottom wall portion 11a. The top wall portion 11f is provided at a distance from the bottom wall portion 11a in the thickness direction (Z direction) of the bottom wall portion 11a. The top wall portion 11f extends substantially parallel to the bottom wall portion 11a. The outer surface 11m (FIG. 3) of the top wall portion 11f is also referred to as a top surface or an upper surface. The bottom wall portion 11a and the top wall portion 11f are an example of a pair of first wall portions that are separated from each other in the vertical direction (first direction) of the housing 11. In addition, the end wall portions 11b and 11c are a pair of end second wall portions spaced apart from each other in the longitudinal direction (second direction) of the housing 11 that intersects the vertical direction (first direction) of the housing 11. It is an example. Further, the side wall portions 11d and 11e are formed in the lateral direction (third direction) of the casing 11 that intersects the vertical direction (first direction) of the casing 11 and the longitudinal direction (second direction) of the casing 11. It is an example of a pair of 3rd wall part mutually spaced apart.

  As shown in FIGS. 4 and 11, the intermediate wall portion 11 g is formed in a quadrangular (for example, rectangular) plate shape. The intermediate wall portion 11g is located between the bottom wall portion 11a and the top wall portion 11f. The intermediate wall portion 11g extends substantially parallel to the bottom wall portion 11a and the top wall portion 11f. The intermediate wall portion 11g is connected to the inner surfaces of the end wall portions 11b and 11c and the side wall portions 11d and 11e.

  As shown in FIG. 4, the partition wall 11h is formed in a quadrangular (for example, rectangular) plate shape. The partition wall portion 11h is located between the bottom wall portion 11a and the intermediate wall portion 11g and connected to the bottom wall portion 11a. The partition wall portion 11h is provided side by side with the end wall portions 11b and 11c. The partition wall portion 11h is provided substantially parallel to the end wall portions 11b and 11c. Further, the plurality of partition wall portions 11h are arranged side by side (in parallel as an example) with their surfaces facing each other. The interval between the partition wall portions 11h is substantially constant.

  As shown in FIG. 4, a housing chamber 11 i surrounded by a bottom wall portion 11 a, end wall portions 11 b and 11 c, side wall portions 11 d and 11 e, and an intermediate wall portion 11 g is provided inside the housing 11. Yes. The storage chamber 11i is partitioned into a plurality of regions (chambers) by the partition wall portion 11h, and one battery cell 12 is stored in each region.

  The casing 11 is made of an insulating synthetic resin material (for example, modified PPE (polyphenylene ether), PFA (perfluoroalkoxyalkane, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), etc.). . Further, as the synthetic resin material of the housing 11, a thermoplastic resin can be used. For example, PE, olefin resin such as PP and PMP, polyester resin such as PET, PBT, and PEN, POM resin, PA6, and the like. Polyamide resins such as PA66, PA12, crystalline resins such as PPS resin, LCP resin and their alloy resins, or PS, PC, PC / ABS, ABS, AS, modified PPE, PES, PEI, PSF, etc. Non-crystalline resins and their alloy resins can be used.

  As shown in FIG. 3 and the like, the housing 11 is configured as a combination of a plurality of members, specifically, a lower housing member 41, an upper housing member 42, and a cover 43. The upper housing member 42 is overlapped on the upper end portion (one end portion) of the lower housing member 41 and is detachably coupled to the lower housing member 41. For example, the upper housing member 42 is configured so that the engagement claw provided at the lower end portion of the upper accommodation member 42 is hooked on the peripheral surface of the engagement hole provided at the upper end portion of the lower accommodation member 41. The member 41 is detachably coupled. Further, the cover 43 is overlapped with the upper end portion (one end portion) of the upper accommodation member 42 and coupled to the upper accommodation member 42. A storage chamber 11 i is provided in the lower storage member 41 and the upper storage member 42, and the storage chamber 11 i is surrounded by the lower storage member 41 and the upper storage member 42. That is, the lower housing member 41 and the upper housing member 42 constitute a housing body 60 that houses a plurality of battery cells 12. Further, the cover 43 is detachably coupled to the upper housing member 42 by, for example, engaging hooks provided on the cover 43 on the peripheral surface of the engagement hole provided on the upper end portion of the upper housing member 42. Is done. It should be noted that a fastening member such as a screw may be used instead of the engagement claw and the engagement hole for coupling the lower accommodation member 41, the upper accommodation member 42, and the cover 43. The lower housing member 41 is also referred to as a first housing member, the upper housing member 42 is also referred to as a second housing member, and the cover 43 is also referred to as a third housing member. The container 60 is an example of a housing member.

  The lower housing member 41 includes a bottom wall portion 11a, end wall portions 11b and 11c including lower end portions of the end wall portions 11b and 11c, and side wall portions 11d and 11e including lower end portions of the side wall portions 11d and 11e. And a partition wall portion 11h.

  The upper accommodating member 42 includes a part of the end wall portions 11b and 11c including the intermediate portion in the vertical direction of the end wall portions 11b and 11c and the side wall portions 11d and 11e including the intermediate portion in the vertical direction of the side wall portions 11d and 11e. It has a part and the intermediate wall part 11g. The upper housing member 42 covers the internal space (opening) of the lower housing member 41. Further, four (plural) fixing portions 50 </ b> A to 50 </ b> D are provided at the upper end portion of the upper housing member 42. Hereinafter, the fixed part 50 may be used as a general term for the fixed parts 50A to 50D. The terminal member 14 is arrange | positioned at two (fixed part 50A, 50C) of these four fixed parts 50. FIG. The fixing unit 50 is also referred to as a terminal block.

  The cover 43 includes a top wall portion 11f, end wall portions 11b, 11c including upper end portions of the end wall portions 11b, 11c, and side wall portions 11d, 11e including upper end portions of the side wall portions 11d, 11e. And. The cover 43 covers the fixed portion 50, the positive terminal member 14A, the negative terminal member 14B, and the like. The cover 43 is provided with an opening 43a. The opening 43a is provided with respect to a wall 14b of a negative electrode terminal member 14B described later.

  A plurality of conductive members 13, terminal members 14, circuit boards 17, and the like are accommodated in an accommodation chamber 11k (space, FIG. 4) provided between the intermediate wall portion 11g and the top wall portion 11f. . Further, the positive electrode terminal portion 22A and the negative electrode terminal portion 22B of the battery cell 12 pass through a through-hole (opening portion) provided in the intermediate wall portion 11g, and are on the top wall portion 11f side of the intermediate wall portion 11g, that is, the accommodation chamber. It protrudes into 11k. And the conductive member 13 is welded to the electrode terminal part 22 of the battery cell 12, for example. The terminal member 14 and the circuit board 17 are coupled to the upper housing member 42 by a coupling tool such as a screw.

  The circuit board 17 is, for example, a printed circuit board (PCB). The circuit board 17 is provided with a wiring pattern, and a plurality of electronic components are mounted thereon. The circuit board 17 is electrically connected to the conductive member 13 and the terminal member 14, and can detect the temperature of the conductive member 13 and the terminal member 14, the voltage of the battery cell 12, and the like. A connector 48 is mounted on the circuit board 17. The connector 48 is a communication connector, for example. For example, a connector of a communication cable is connected to the connector 48. For example, the control device receives the detection result of the circuit board 17 and controls the voltage of the battery cell 12 via the communication cable.

  Next, the fixing | fixed part 50 (50A-50D) and the terminal member 14 (14A, 14B) are demonstrated in detail.

  4-13, the fixing | fixed part 50A-50D is provided in each of the four corner | angular parts 60aA-60aD of the upper end part of the container 60. As shown in FIG. That is, the fixing portions 50A to 50D are provided in each of the four corner portions 60aA to 60aD of the container 60 that are separated from each other when viewed along the vertical direction (when viewed from above). The corner portions 60aA to 60aD are also the corner portions 60aA to 60aD of the upper housing member 42. The corner portions 60aA and 60aB and the corner portions 60aC and 60aD are provided with an interval in the X direction. Further, the corner portion 60aA and the corner portion 60aB are provided with an interval in the Y direction, and the corner portion 60aC and the corner portion 60aD are provided with an interval in the Y direction. Further, the corner portion 60aA and the corner portion 60aC are provided at diagonal positions, and the corner portion 60aB and the corner portion 60aD are provided at diagonal positions. Hereinafter, the corner 60a may be used as a general term for the corners 60aA to 60aD.

  As shown in FIGS. 11 and 14, each fixing portion 50 has a base portion 51 and a nut 52.

  The base portion 51 is formed integrally with the upper housing member 42. The base portion 51 has three surfaces (an upper surface 51a, an end surface 51b, and a side surface 51c) that face outward from the housing 11 and intersect each other.

  The upper surface 51a extends along the XY plane. The upper surface 51a faces the up-down direction of the housing 11, specifically, the upper side which is one of the up-down directions. The upper surface 51a is an example of a first surface, and the vertical direction of the housing 11 is an example of a first direction.

  The end surface 51b extends along the YZ plane. The end surface 51 b faces the longitudinal direction of the housing 11. Specifically, the end surfaces 51b of the fixing portions 50A and 50B face one side in the longitudinal direction of the housing 11 (X direction), and the end surfaces 51b of the fixing portions 50C and 50D are the other in the longitudinal direction of the housing 11 (X direction). (Opposite direction). The end surface 51b is an example of the second surface, and the longitudinal direction of the housing 11 is an example of the second direction.

  Further, the side surface 51c extends along the XZ plane. The side surface 51 c faces the short side direction (third direction) of the housing 11. Specifically, the side surfaces 51c of the fixing portions 50A and 50D face one side in the short direction of the housing 11 (the direction opposite to the Y direction), and the side surfaces 51c of the fixing portions 50B and 50C are the short side direction of the housing 11 It faces the other side (Y direction). The side surface 51c is an example of a third surface, and the lateral direction of the housing 11 is an example of the third direction. The base 51 may be configured as a separate part from the upper housing member 42 and attached to the upper housing member 42.

  Further, as shown in FIG. 11, a standing wall portion 61 is provided between the base portion 51 of the fixing portion 50A and the base portion 51 of the fixing portion 50D, and the base portion 51 of the fixing portion 50B and the base of the fixing portion 50C are provided. A vertical wall portion 62 is provided between the portion 51.

  As shown in FIGS. 11 and 14, the nut 52 is provided on each of the three surfaces (the upper surface 51 a, the end surface 51 b, and the side surface 51 c) of the base portion 51. The nut 52 is fixed to the base portion 51. Each nut 52 is connectable with the coupler 102 (FIG. 1). The nut 52 is provided with an opening 52a (through hole, see FIG. 14) into which the coupler 102 can be inserted. The coupler 102 is a male screw member such as a bolt. Each nut 52 is disposed inside the base portion 51 and exposed from the upper surface 51a, the end surface 51b, and the side surface 51c. The axial direction of the nut 52 provided on the upper surface 51 a is along the vertical direction of the housing 11, and the axial direction of the nut 52 provided on the end surface 51 b is along the longitudinal direction of the housing 11, and is provided on the side surface 51 c. The axial direction of the nut 52 is along the short direction of the housing 11. That is, the insertion / removal direction of the coupler 102 with respect to the nut 52 provided on the upper surface 51a is along the vertical direction of the casing 11, and the insertion / removal direction of the coupler 102 with respect to the nut 52 provided on the end face 51b is The insertion / removal direction of the coupler 102 with respect to the nut 52 provided on the side surface 51 c is along the short direction of the housing 11. The nut 52 is an example of a coupling portion that can be mechanically coupled to the coupling tool 102. Note that the coupling portion and the coupling tool 102 are not limited to the above. For example, the coupler 102 may be a snap fit, and the coupling portion may be a hooking portion such as a recess provided in the base portion 51 and catching the snap fit.

  As shown in FIGS. 6 and 12, the positive electrode terminal member 14A and the negative electrode terminal member 14B include a fixed portion 50A of two corner portions 60aA and 60aC positioned at the first diagonal among the four corner portions 60aA to 60aD. 50C is provided for each. Each positive electrode terminal member 14 </ b> A and negative electrode terminal member 14 </ b> B are electrically connected to electrode terminal portions 22 of different battery cells 12. Further, the positive electrode terminal member 14A and the negative electrode terminal member 14B are electrically conductive members 100 (see FIG. 1) fixed to the fixing portion 50 by a coupler 102 (see FIG. 1) connected to any of the three nuts 52 of the fixing portion 50. ) And are electrically connected. The terminal member 14 is also referred to as an output terminal member or a terminal block bus bar.

  16 and 17 show the positive electrode terminal member 14A, and FIGS. 18 and 19 show the negative electrode terminal member 14B. As can be seen from FIGS. 12 and 16 to 19, the positive electrode terminal member 14 </ b> A and the negative electrode terminal member 14 </ b> B have the same shape, and have different attachment postures (directions) to the housing 11.

  16-19, the terminal member 14 has wall part 14a-14d, the connection part 14e, and the connection piece 14f. The terminal member 14 is made of a conductive material such as aluminum. The terminal member 14 is also referred to as a bus bar, a connection member, or a conductive member.

  Wall part 14a is comprised by the substantially flat plate shape along XY plane. The wall part 14b is comprised by the substantially flat plate shape along YZ plane. The wall portion 14 b extends downward from an end portion of the wall portion 14 a in the longitudinal direction of the housing 11. The wall part 14c is comprised by the substantially flat plate shape along XZ plane. The wall portion 14 c extends downward from the end portion of the wall portion 14 a in the short direction of the housing 11. The three wall portions 14a to 14c are superimposed on the three surfaces (the upper surface 51a, the end surface 51b, and the side surface 51c) of the base portion 51 (see FIGS. 12 and 15). Specifically, the wall portion 14 a is overlaid on the end surface 51 a of the base portion 51, the wall portion 14 b is overlaid on the end surface 51 b of the base portion 51, and the wall portion 14 c is overlaid on the side surface 51 c of the base portion 51. Yes. One of these three wall portions 14 a to 14 c is electrically connected to the conductive member 100. In the present embodiment, the wall portion 14a is electrically connected to the conductive member 100 in the positive electrode terminal member 14A, and the wall portion 14b is electrically connected to the conductive member 100 in the negative electrode terminal member 14B. Moreover, the through-holes 14g are provided in each wall part 14a-14c. The through hole 14g penetrates the wall portions 14a, 14b, and 14c in the thickness direction of the wall portions 14a to 14c. The through hole 14g communicates with the opening 52a of the nut 52, and the coupler 102 can be inserted. Wall part 14a-14c is also called a terminal part.

  The wall portion 14d is configured in a substantially flat plate shape along the XY plane. The wall part 14d is connected with the wall part 14a via the connection part 14e. The wall portion 14d is provided with a through hole 14h. The through hole 14h penetrates the wall portion 14d in the thickness direction of the wall portion 14d. The wall portion 14 d is electrically connected to the electrode terminal portion 22 of the battery cell 12. Specifically, the wall portion 14 d is overlapped with the electrode terminal portion 22, and a portion around the through hole 14 h is welded (coupled) to the electrode terminal portion 22. The wall portion 14d and the electrode terminal portion 22 may be connected by mechanical coupling using screws or the like. In addition, in this embodiment, although the opening part 43a is provided with respect to the wall part 14b, it is not restricted to this. For example, the opening 43a may be provided with respect to the walls 14a and 14c.

  The connection piece 14f extends from the edge of the wall 14d. The connection piece 14 f is connected to the circuit board 17.

  In the above configuration, any one of the three nuts 52 of each of the fixing portions 50 </ b> A and 50 </ b> C causes the positive electrode terminal member 14 </ b> A, the negative electrode terminal member 14 </ b> B, and the conductive member 100 to be in electrical contact with the coupler 102. In the present embodiment, for example, in the negative electrode terminal member 14B, the end portion (terminal portion) of the coupler 102 is overlapped on the wall portion 14b exposed from the opening 43a (see FIG. 2) provided in the cover 43 (see FIG. 1). Then, the nut 52 provided on the end surface 51b and the coupler 102 are coupled in a state where the wall portion 14b and the end of the coupler 102 are sandwiched between the end surface 51b and the coupler 102. Thereby, the negative electrode terminal member 14B and the conductive member 100 are in electrical contact.

  The negative electrode terminal member 14 </ b> B is electrically connected to the conductive member 100 via a cylindrical member 70 (see FIG. 3) provided on the cover 43. The cylindrical member 70 is provided with respect to the fixed portion 50A (positive electrode terminal member 14A). The tubular member 70 passes through the top wall portion 11f. The cylindrical member 70 is made of a conductive material such as aluminum. The through hole 70a of the cylindrical member 70 communicates (overlaps) with the through hole 14g of the wall portion 14a of the positive electrode terminal member 14A and the opening 52a of the nut 52 of the fixing portion 50A. The upper end portion of the cylindrical member 70 is exposed above the cover 43. The lower end portion of the cylindrical member 70 is in contact with the wall portion 14a of the positive terminal member 14A. That is, the cylindrical member 70 is electrically connected to the positive terminal member 14A. The coupler 102 can be inserted into the through hole 70a. In such a configuration, the head of the coupler 102 inserted into the through-hole 70a of the cylindrical member 70 and the upper surface 51a of the base portion 51 of the fixed portion 50A include the conductive member 100, the cylindrical member 70, The coupler 102 is coupled to the nut 52 with the wall portion 14a of the positive electrode terminal member 14A interposed therebetween. As a result, the wall portion 14 a of the positive electrode terminal member 14 </ b> A and the conductive member 100 are electrically connected via the cylindrical member 70.

  Further, in the present embodiment, as shown in FIGS. 20 to 22, another cover 43 </ b> A can be attached to the housing body 60 of the assembled battery 1 instead of the cover 43. That is, an assembled battery 1A having the cover 43A can be obtained. In the assembled battery 1, 1 </ b> A, a plurality of types of covers 43, 43 </ b> A can be rearranged and attached to the container 60.

  A plurality of cylindrical members 70 are provided on the cover 43A. For example, the cylindrical member 70 is provided for each of the fixing portions 50A and 50C (the positive terminal member 14A and the negative terminal member 14B). The wall 43a of the positive electrode terminal member 14A and the negative electrode terminal member 14B and the conductive member 100 are electrically connected through the cylindrical member 70 by the cover 43A.

  As described above, in the present embodiment, for example, the fixed portion 50 has three surfaces facing the direction intersecting with each other outside the housing 11, that is, the upper surface 51 a (first surface) and the end surface. 51b (second surface), side surface 51c (third surface), and three surfaces (upper surface 51a, end surface 51b, side surface 51c) are provided, and each is mechanically coupled to the coupler 102. It has three possible nuts 52. Further, the terminal member 14 is electrically connected to the conductive member 100 that is fixed to the fixing portion 50 by a coupler 102 that is connected to any of the three nuts 52 of the fixing portion 50. Therefore, according to the present embodiment, for example, the degree of freedom of the attachment position of the conductive member 100 with respect to the terminal member 14 is relatively large. Therefore, for example, when the plurality of assembled batteries 1 are connected by the conductive member 100, the degree of freedom of the arrangement and posture of the assembled battery 1 is relatively large. Moreover, when connecting the some assembled battery 1 with the electrically-conductive member 100, it is easy to shorten the length of the electrically-conductive member 100. FIG. Therefore, a plurality of assembled batteries can be connected inexpensively and easily.

  Note that the nut 52 used for connection with the conductive member 100 may be other than those described above. In this case, a cover provided with the opening 43a and the cylindrical member 70 corresponding to the nut 52 to be used may be used. Moreover, the opening part 43a and the cylindrical member 70 may be provided so that the opening part 52a of all the nuts 52 may be exposed. The assembled battery 1 may be installed in a state where the cover 43 is not provided.

<Second Embodiment>
A battery module 200 of the present embodiment shown in FIG. 23 includes a plurality (for example, two) of assembled batteries 1B and 1C and a conductive member 100A that electrically connects the assembled batteries 1B and 1C. . The assembled battery 1B is an example of a first assembled battery, and the assembled battery 1C is an example of a second assembled battery.

  The assembled battery 1B is different from the assembled battery 1 in the cover 43B. In the cover 43 </ b> B, the positions of the opening 43 a (see FIG. 1) and the cylindrical member 70 are reversed with respect to the cover 43. That is, the opening 43a is provided to the fixed portion 50A (positive electrode terminal member 14A (not shown in FIGS. 23 and 24)), and the cylindrical member 70 is provided to the fixed portion 50C and negative electrode terminal member 14B (FIGS. 23 and 24). (Not shown). The cylindrical member 70 is also referred to as a collar.

  The assembled battery 1C differs from the assembled battery 1 in the arrangement of the positive electrode terminal member 14A and the negative electrode terminal member 14B (not shown in FIGS. 23 and 24) and the cover 43C. In the assembled battery 1C, the positive electrode terminal member 14A is disposed in the fixed portion 50B, and the negative electrode terminal member 14B is disposed in the fixed portion 50D. Note that the positive electrode terminal member 14A and the negative electrode terminal member 14B of the present embodiment are configured in a plane-symmetric shape with respect to the XZ plane with the positive electrode terminal member 14A and the negative electrode terminal member 14B of the first embodiment.

  The position of the opening 43a (see FIG. 1) and the cylindrical member 70 is different from that of the cover 43 in the cover 43C. In the cover 43C, the opening 43a is provided with respect to the fixed portion 50D (negative electrode terminal member 14B), and the cylindrical member 70 is provided with respect to the fixed portion 50B (positive electrode terminal member 14A).

  As shown in FIG. 23, the assembled battery 1B and the assembled battery 1C are arranged in a direction (for example, the Y direction and the lateral direction of the casing) that intersects the vertical direction (first direction) of the casing 11. It has been. That is, the assembled battery 1B and the assembled battery 1C are arranged in a posture in which the side wall portions 11d of the housing 11 face each other. The assembled battery 1B and the assembled battery 1C are arranged such that the first diagonal direction DB of the assembled battery 1B and the first diagonal direction DC of the assembled battery 1C are different from each other. The first diagonal directions DB and DC are diagonal directions of the positive electrode terminal member 14A and the negative electrode terminal member 14B, that is, the fixing portion 50 where the positive electrode terminal member 14A is arranged and the fixed where the negative electrode terminal member 14B is arranged. This is a diagonal direction with respect to the portion 50.

  The conductive member 100A is configured in a flat belt shape. The conductive member 100A electrically connects the positive electrode terminal member 14A provided at 60aA of the assembled battery 1B and the negative electrode terminal member 14B provided at the corner 60aD of the assembled battery 1C. That is, the conductive member 100A electrically connects the two terminal members 14 provided at the two adjacent corner portions 60a of the assembled batteries 1B and 1C.

<Third Embodiment>
A battery module 200A of the present embodiment shown in FIGS. 25 to 27 includes a plurality (for example, two) of assembled batteries 1 and 1D and a conductive member 100B electrically connected to the assembled batteries 1 and 1D. ing. The assembled battery 1 is an example of a first assembled battery, and the assembled battery 1D is an example of a second assembled battery.

  As shown in FIG. 27, the assembled battery 1 </ b> D has a cover 43 </ b> D different from that of the assembled battery 1. In addition to the opening 43a (see FIG. 1) provided for the fixing portion 50C (negative electrode terminal member 14B), the cover 43D has an opening 43a for the fixing portion 50A (positive electrode terminal member 14A). It has been. In addition, the cylindrical member 70 is not provided in the cover 43D. In the cover 43D, the end wall portions 11b and 11c and the side wall portions 11d and 11e extend upward from the top wall portion 11f, and a recess 43b is formed above the top wall portion 11f. The lower end portion of the assembled battery 1 is fitted into the recess 43b.

  As illustrated in FIGS. 25 and 26, the assembled battery 1 and the assembled battery 1 </ b> D are arranged in the vertical direction (first direction) of the housing 11. Specifically, the assembled battery 1 is stacked on the upper side of the assembled battery 1D. That is, the assembled battery 1 and the assembled battery 1D are arranged in a posture in which the bottom wall portion 11a of the assembled battery 1 and the top wall portion 11f of the assembled battery 1D face each other. The assembled battery 1 and the assembled battery 1D are arranged such that the first diagonal direction D of the assembled battery 1 and the first diagonal direction DD of the assembled battery 1D are the same. . The first diagonal directions D and DD are diagonal directions of the positive electrode terminal member 14A and the negative electrode terminal member 14B, that is, the fixing portion 50 where the positive electrode terminal member 14A is arranged and the fixed where the negative electrode terminal member 14B is arranged. This is a diagonal direction with respect to the portion 50.

  The conductive member 100B of the present embodiment is configured in a flat belt shape. The conductive member 100B includes a negative terminal member 14B (not shown in FIGS. 25 and 26) provided at the corner 60aC of the assembled battery 1 and a positive terminal 14A (see FIG. 25, provided at the corner 60aA of the assembled battery 1D). 26 is not electrically shown). That is, the conductive member 100B electrically connects the two terminal members 14 provided at the two corners 60a of the assembled batteries 1 and 1D that overlap each other when viewed in the vertical direction (first direction) of the housing 11. Connected.

<Fourth Embodiment>
The assembled battery 1E of the present embodiment shown in FIGS. 28 to 30 is different from the assembled battery 1 of the first embodiment in the cover 43E. As shown in FIG. 30, the opening 43 a is provided in the side wall 11 e of the cover 43. The opening 43a exposes the opening 52a of the nut 52 of the fixing portions 50A and 50D.

  As shown in FIGS. 28 and 29, the housing 11 is fixed to the support member 300 by a coupler 102A. The coupler 102A is a male screw member such as a bolt. The coupler 102A is attached to the nut 52 with the support member 300 sandwiched between the nut 52 provided on the side surface 51c of the fixing portions 50B and 50C. The support member 300 is, for example, a bracket or a wall provided on the vehicle body of the vehicle.

  In the present embodiment configured as described above, any one of the three nuts 52 of the fixing portion 50C (for example, the nut 52 provided on the end surface 51b) is connected to the terminal member 14 (positive terminal member) by the coupler 102. 14A) and the conductive member 100 are in electrical contact. Then, one of the three nuts 52 of the fixing portion 50C other than the above (for example, the nut 52 provided on the side surface 51c) is attached to the coupler 102A with the support member 300 interposed therebetween. In this state, the housing 11 is supported (fixed) on the support member 300. That is, the nut 52 of the fixing portion 50 can be used for fixing the housing 11. The coupler 102 is an example of a first coupler, and the coupler 102A is an example of a second coupler.

  Note that the nut 52 used for coupling with the support member 300 may be other than those described above. In this case, a cover provided with the opening 43a and the cylindrical member 70 corresponding to the nut 52 to be used may be used. Moreover, the opening part 43a and the cylindrical member 70 may be provided so that the opening part 52a of all the nuts 52 may be exposed. The assembled battery 1E may be installed in a state where the cover 43E is not provided.

  In addition, you may combine any two or more elements of said each embodiment in the technically possible range.

  As mentioned above, although embodiment of this invention was illustrated, the said embodiment is an example to the last, Comprising: It is not intending limiting the range of invention. The above embodiment can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. The above embodiments are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof. The present invention can be realized by configurations other than those disclosed in the above embodiments, and various effects (including derivative effects) obtained by the basic configuration (technical features) can be obtained. is there. In addition, the specifications of each component (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) should be changed as appropriate. Can do.

  DESCRIPTION OF SYMBOLS 1,1A-1E ... Assembly battery, 11 ... Housing | casing, 11a ... Bottom wall part (1st wall part), 11b, 11c ... End wall part (2nd wall part), 11d, 11e ... Side wall part (1st (Third wall part), 11f ... top wall part (first wall part), 12 ... battery cell, 14 ... terminal member, 14A ... positive electrode terminal member, 14B ... negative electrode terminal member, 14a-14c ... wall part, 14g ... Through hole, 43, 43A to 43E ... cover, 50, 50A to 50D ... fixed portion, 51a ... upper surface (first surface, surface), 51b ... end surface (second surface, surface), 51c ... side surface (third) , 52... Nut (coupling portion), 52 a... Opening, 60... Housing (housing member), 60 a, 60 aA to 60 a D .. corner portion, 70 .. cylindrical member, 100, 100 A, 100 B. Conductive member, 102 ... coupler (first coupler), 102A ... coupler (second coupler), 200, 2 0A ... battery module, 300 ... support member.

Claims (10)

A housing,
A plurality of battery cells housed in the housing and electrically connected to each other;
Three surfaces facing the direction intersecting each other outside the housing, and three coupling portions provided for each of the three surfaces, each of which can be mechanically coupled to a coupling tool, A fixing portion provided in the housing;
A terminal member electrically connected to the conductive member fixed to the fixing portion by the coupler coupled to any of the three coupling portions, and electrically connected to the battery cell;
Assembled battery with The terminal member has three wall portions superimposed on each of the three surfaces,
The assembled battery according to claim 1, wherein the wall portion is electrically connected to the conductive member. The coupling portion is provided with an opening through which the coupling tool can be inserted,
The assembled battery according to claim 2, wherein the wall portion is provided with a through hole that allows the insertion of the coupler through the opening. The housing includes a housing that houses the plurality of battery cells and is provided with the coupling portion, and a cover that covers the fixing portion and the terminal member,
4. The assembled battery according to claim 2, wherein the cover is provided with a tubular member into which the coupler can be inserted and electrically connects the wall portion and the conductive member. 5. Any one of the three coupling portions electrically contacts the terminal member and the conductive member with the first coupling tool,
The housing is supported by the support member in a state where any one of the three coupling portions other than the one is attached to the second coupling tool with a support member interposed therebetween. Item 5. The assembled battery according to any one of Items 1 to 4. The housing includes a housing member having four corners spaced from each other when viewed along the first direction,
The assembled battery as described in any one of Claims 1-5 by which the said fixing | fixed part was provided in each of the said four corner | angular parts.   The assembled battery according to claim 6, wherein the terminal member is provided in each of the fixed portions of the two corner portions positioned at the first diagonal among the four corner portions. The housing includes a pair of first wall portions spaced apart from each other in a first direction, a pair of second wall portions spaced apart from each other in a second direction intersecting the first direction, and the first And a pair of third wall portions spaced apart from each other in a third direction intersecting the second direction and the second direction,
The fixing portion includes: the first surface facing the first direction; the second surface facing the second direction; the third surface facing the third direction; The assembled battery according to claim 1, comprising: A plurality of assembled batteries according to claim 7;
The conductive member;
With
The first assembled battery and the second assembled battery are arranged in a direction intersecting the first direction,
The first diagonal direction of the first assembled battery and the first diagonal direction of the second assembled battery are different from each other,
The conductive module is a battery module in which the two terminal members provided at the two corners adjacent to each other of the first assembled battery and the second assembled battery are electrically connected. A plurality of assembled batteries according to claim 7;
The conductive member;
With
The first assembled battery and the second assembled battery are arranged in the first direction,
The first diagonal direction of the first assembled battery and the first diagonal direction of the second assembled battery are the same as each other,
The conductive member electrically connects the two terminal members provided at the two corners of the first assembled battery and the second assembled battery that overlap each other when viewed in the first direction. Battery module.