Busbar retaining member and battery module

Abstract

To maintain a good connection state between a bus bar and a plurality of batteries even when the batteries expand in a parallel direction.SOLUTION: A bus bar holding member comprises: a plurality of holding member main bodies 50 each of which has a bus bar holding part 52 that holds a bus bar 3 electrically connected with batteries 20, and a harness housing part 51 that houses a harness 4 electrically connected with the bus bar 3 and extending in a parallel direction L; and a coupling part 80 for coupling between the plurality of holding member main bodies 50 arranged side by side in the parallel direction L. The coupling part 80 is configured to extend and contract in the parallel direction L.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] As exemplified in Patent Document 1, a battery module mounted on an electric vehicle or a hybrid vehicle includes a battery unit in which a plurality of batteries are arranged along a parallel direction, a bus bar electrically connected to the batteries, a bus bar holding member that holds the bus bar, and a harness electrically connected to the bus bar. Thus, the tip of the harness is connected to the battery via the bus bar, and outputs the voltage of the battery to the outside of the battery module.

[0002] However, as exemplified in Patent Document 1, since the battery unit has a plurality of batteries arranged along the parallel direction, when these batteries expand due to heat generation, a positional deviation in the parallel direction occurs between the bus bar held by the bus bar holding member and the battery. As a result, there is a possibility that a good connection state between the bus bar and the battery cannot be maintained.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a bus bar holding member and a battery module that can maintain a good connection state between the bus bar and the battery even when a plurality of batteries expand in the parallel direction.

Means for Solving the Problems

[0005] This invention relates to a busbar holding member for holding busbars attached to a battery unit in which a plurality of batteries are arranged in parallel, and comprises a plurality of holding member bodies having a busbar holding portion for holding the busbars electrically connected to the batteries and a harness housing portion for housing harnesses electrically connected to the busbars, and a connecting portion for connecting the plurality of holding member bodies arranged in parallel to each other, wherein the connecting portion is configured to expand and contract in the parallel direction. The connecting portion connects the harness housing portions that are arranged in the parallel direction, and the harness housing portion has a bottom portion that extends in the parallel direction and a pair of side wall portions that are erected from both ends of the bottom portion in the width direction, and the connecting portion connects the side wall portions that are adjacent in the parallel direction. It is characterized by the following:

[0006] Furthermore, this invention relates to a busbar holding member for holding a busbar attached to a battery unit in which a plurality of batteries are arranged in parallel, and comprises a plurality of holding member bodies having a busbar holding portion for holding the busbar that is electrically connected to the batteries and a harness housing portion for housing a harness that is electrically connected to the busbar, and a connecting portion for connecting the plurality of holding member bodies arranged in parallel, wherein the connecting portion is configured to extend and retract in the parallel direction, the connecting portion connects the harness housing portions that are arranged in parallel, the harness housing portion has a bottom portion that extends in the parallel direction and a pair of side wall portions that are erected from both ends of the bottom portion in the width direction, and the connecting portion is characterized in that it comprises a first connecting portion that connects adjacent side wall portions in the parallel direction and a second connecting portion that connects adjacent bottom portions in the parallel direction.

[0007] Also This invention comprises a plurality of batteries arranged in parallel, busbars electrically connected to the batteries, a busbar holding member for holding the busbars, and a harness electrically connected to the busbars. The busbar holding member has a busbar holding portion for holding the busbars and a harness housing portion for housing the harness. The holding member also comprises a plurality of holding member bodies in which the busbar holding portions are arranged along the parallel direction of the arrangement of the batteries, and a connecting portion for connecting adjacent holding member bodies in the parallel direction. The connecting portion is configured to extend and retract in the parallel direction. The connecting portion connects the harness housing portions that are arranged in the parallel direction, and the harness housing portion has a bottom portion that extends in the parallel direction and a pair of side wall portions that are erected from both ends of the bottom portion in the width direction, and the connecting portion connects the side wall portions that are adjacent in the parallel direction. It is characterized by the following:

[0008] Furthermore, this invention comprises a plurality of batteries arranged in parallel, busbars electrically connected to the batteries, a busbar holding member for holding the busbars, and a harness electrically connected to the busbars, wherein the busbar holding member has a busbar holding portion for holding the busbars and a harness housing portion for housing the harness, and comprises a plurality of holding member bodies in which a plurality of the busbar holding portions are arranged along the parallel direction in which the batteries are arranged, and a connecting portion for connecting adjacent holding member bodies in the parallel direction, wherein the connecting portion is configured to extend and retract in the parallel direction, the connecting portion connects the harness housing portions that are arranged in the parallel direction, the harness housing portion has a bottom portion extending in the parallel direction and a pair of side wall portions erected from both ends of the bottom portion in the width direction, and the connecting portion is characterized by being composed of a first connecting portion that connects adjacent side wall portions in the parallel direction and a second connecting portion that connects adjacent bottom portions in the parallel direction.

[0009] Thus, A busbar holding member for holding busbars attached to a battery unit in which multiple batteries are arranged in parallel, comprising a plurality of holding member bodies having a busbar holding portion for holding the busbars electrically connected to the batteries and a harness housing portion for housing harnesses electrically connected to the busbars, and a connecting portion for connecting the plurality of holding member bodies arranged in parallel to each other, wherein the connecting portion is configured to extend and retract in the parallel direction. As a result, the multiple holding member bodies are connected to each other via the connecting portion that expands and contracts in the parallel direction, so that the busbar held by the busbar holding portion can move in the parallel direction to follow the positional displacement in the parallel direction caused by the thermal expansion of the batteries. Therefore, even if multiple batteries expand in the parallel direction due to heat, a good connection between the busbar and the batteries can be maintained.

[0010] Also, The connecting portion connects the harness housing portions that are arranged in the parallel direction. This is the result.Multiple harness housings, arranged in a parallel direction that coincides with the harness routing direction (longitudinal direction), can be connected by the connecting portion. As a result, the busbars held in the busbar holding portion can move stably along the parallel direction via the connecting portion and harness housings, following any positional displacement in the parallel direction caused by thermal expansion of the battery.

[0011] Also, The harness housing portion has a bottom portion extending in the parallel direction and a pair of side wall portions erected from both ends of the bottom portion in the width direction, and the connecting portion connects adjacent side wall portions in the parallel direction. By being there, Since the connecting portions on both sides of the bottom in the width direction expand and contract in the parallel direction, the multiple holding member bodies can suppress positional displacement in the width direction when moving in the parallel direction.

[0012] Also, The harness housing portion has a bottom portion extending in the parallel direction and a pair of side wall portions erected from both ends of the bottom portion in the width direction, and the connecting portion is composed of a first connecting portion that connects adjacent side wall portions in the parallel direction and a second connecting portion that connects adjacent bottom portions in the parallel direction. By being there, Since the multiple holding member bodies are connected via a second connecting portion positioned along the bottom and a first connecting portion positioned along a side wall portion erected relative to the bottom, they can move in a parallel direction while suppressing misalignment in the width direction and orthogonal direction.

[0013] In another aspect of this invention, the connecting portion may be formed in a wave-like shape that is wavy along the connecting direction. This invention allows the corrugated connecting portion to expand in response to the parallel displacement caused by the thermal expansion of the batteries. When the batteries cool after thermal expansion, the expanded connecting portion contracts in a corrugated shape from the position that was displaced due to thermal expansion, thus enabling a more compact design.

[0014] Here, the wave pattern along the connection direction refers to a wave pattern that amplitudes in a direction perpendicular to the connection direction. In addition, the wavy connecting portion is not particularly limited in terms of period, amplitude, and wavelength. For example, it may be a part of a wave such as a half-wavelength wave consisting only of the peak portion of the wave. Further, the wavy connecting portion is not limited to a single wave shape, and may be a wave shape in which a plurality of waves having at least one of different periods, amplitudes, and wavelengths are connected in series in the connecting direction. Furthermore, the wavy connecting portion is not limited to a smooth shape, and may be, for example, a zigzag shape such as an M shape or a V shape, a concavo-convex shape, or a shape having corners (inflection points) such as a V shape.

[0015] Furthermore, this invention relates to a busbar holding member for holding a busbar attached to a battery unit in which a plurality of batteries are arranged in parallel, and comprises a plurality of holding member bodies having a busbar holding portion for holding the busbar that is electrically connected to the batteries and a harness housing portion for housing a harness that is electrically connected to the busbar, and a connecting portion for connecting the plurality of holding member bodies arranged in parallel, wherein the connecting portion is configured to expand and contract in the parallel direction, the connecting portion connects the harness housing portions that are arranged in the parallel direction, the harness housing portions have bottom portions that extend in the parallel direction, the connecting portion connects adjacent bottom portions in the parallel direction, and the connecting portion is formed in a wave-like shape that is wavy along the connecting direction.

[0016] Furthermore, this invention comprises a plurality of batteries arranged in parallel, busbars electrically connected to the batteries, a busbar holding member for holding the busbars, and a harness electrically connected to the busbars, wherein the busbar holding member has a busbar holding portion for holding the busbars and a harness housing portion for housing the harness, and comprises a plurality of holding member bodies in which a plurality of the busbar holding portions are arranged along the parallel direction in which the batteries are arranged, and a connecting portion for connecting adjacent holding member bodies in the parallel direction, wherein the connecting portion is configured to expand and contract in the parallel direction, the connecting portion connects the harness housing portions that are arranged in the parallel direction, the harness housing portions have bottom portions that extend in the parallel direction, the connecting portion connects adjacent bottom portions in the parallel direction, and the connecting portion is formed in a wave-like shape along the connecting direction.

[0017] Thus, a busbar holding member for holding a busbar attached to a battery unit in which multiple batteries are arranged in parallel is provided, comprising a plurality of holding member bodies each having a busbar holding portion for holding the busbar electrically connected to the batteries and a harness housing portion for housing a harness electrically connected to the busbar, and a connecting portion for connecting the plurality of holding member bodies arranged in parallel, wherein the connecting portion is configured to expand and contract in the parallel direction, so that the plurality of holding member bodies are connected to each other via the connecting portion that expands and contracts in the parallel direction, the busbar held by the busbar holding portion can move in the parallel direction to follow the displacement in the parallel direction due to the thermal expansion of the batteries. Therefore, even if the plurality of batteries expand in the parallel direction due to heat, a good connection between the busbar and the batteries can be maintained.

[0018] Furthermore, the connecting portion connects the harness housing portions that are arranged in the parallel direction. This allows multiple harness housing portions, which are arranged in a parallel direction that coincides with the wiring direction (longitudinal direction) of the harness, to be connected by the connecting portion. As a result, the busbar held by the busbar holding portion can move stably along the parallel direction via the connecting portion and the harness housing portions, following the displacement in the parallel direction due to the thermal expansion of the battery.

[0019] In addition, the harness accommodating portion has a bottom portion extending in the parallel direction, and the connecting portion connects the bottom portions adjacent to each other in the parallel direction. This is the result. When obtaining a configuration in which the bottom portions are connected via the connecting portion by molding, since it becomes easy to make the pressing direction by the molding die coincide between the bottom portion and the connecting portion, it can be molded well.

[0020] Also, by connecting the connecting portion to each of the adjacent bottom portions, it is easy for an operator to visually observe and access both the bottom portion and the connecting portion from the orthogonal direction orthogonal to the parallel direction and the width direction, so that the connection work can be performed well.

[0021] Furthermore, because the connecting portion is formed in a wave-like shape along the connecting direction, the wave-shaped connecting portion can expand to follow the parallel displacement caused by the thermal expansion of the batteries. Conversely, when the batteries cool after thermal expansion, the expanded connecting portion contracts in a wave-like shape from the position that was displaced due to thermal expansion, thus enabling a more compact design.

[0022] Here, the wave pattern along the connection direction refers to a wave pattern that amplitudes in a direction perpendicular to the connection direction. Furthermore, the period, amplitude, and wavelength of the corrugated connecting portion are not particularly limited, and may be, for example, a half-wavelength wave consisting only of the crest portion of a wave, or a part of a wave. Also, the corrugated connecting portion is not limited to a single wave shape, but may be a wave shape in which multiple waves with at least one different period, amplitude, and wavelength are connected in series in the connecting direction. Moreover, the corrugated connecting portion is not limited to a smooth shape, but may be a zigzag shape such as an M shape or a V shape, an uneven shape, or a shape having corners (inflection points) such as a V shape.

[0023] As an aspect of the present invention, the connecting portion may be formed to be thinner than the plate thickness of the harness accommodating portion to which the connecting portion is connected. [[ID=,41]]

[0024] This invention makes the connecting portion more flexible and deformable, thereby increasing its elasticity. As a result, the multiple holding member bodies can move more easily in a parallel direction. In other words, the ability of the multiple holding member bodies to follow positional displacement caused by thermal expansion of the battery can be improved.

[0025] In another aspect of this invention, the connecting portion may be formed in a corrugated shape that protrudes toward the accommodation space for accommodating the harness in the harness accommodation portion. This invention makes it possible to suppress interference between the connecting portion and the surrounding members of the harness housing portion.

[0026] In another aspect of this invention, the wave-shaped portion of the connecting part may protrude in the direction opposite to the housing space. This invention makes it possible to prevent the connecting part from entering the containment space.

[0027] Furthermore, this invention relates to a busbar holding member for holding a busbar attached to a battery unit in which a plurality of batteries are arranged in parallel, and comprises a plurality of holding member bodies having a busbar holding portion for holding the busbar that is electrically connected to the batteries and a harness housing portion for housing a harness that is electrically connected to the busbar, and a connecting portion for connecting the plurality of holding member bodies arranged in parallel, wherein the connecting portion is configured to expand and contract in the parallel direction, the connecting portion connects the harness housing portions that are arranged in parallel, the harness housing portion has a bottom portion that extends in the parallel direction, the connecting portion connects adjacent bottom portions in the parallel direction and has a cover facing the bottom portion in the harness housing portion, and is provided with a cover connecting portion that connects adjacent covers in the parallel direction, wherein the cover connecting portion expands and contracts in the parallel direction.

[0028] Furthermore, this invention comprises a plurality of batteries arranged in parallel, busbars electrically connected to the batteries, a busbar holding member for holding the busbars, and a harness electrically connected to the busbars, wherein the busbar holding member has a busbar holding portion for holding the busbars and a harness housing portion for housing the harness, and comprises a plurality of holding member bodies in which a plurality of the busbar holding portions are arranged along the parallel direction in which the batteries are arranged, and a connecting portion for connecting adjacent holding member bodies in the parallel direction, wherein the connecting portion is configured to expand and contract in the parallel direction, the connecting portion connects the harness housing portions that are arranged in the parallel direction, the harness housing portion has a bottom portion that extends in the parallel direction, the connecting portion connects adjacent bottom portions in the parallel direction and has a cover facing the bottom portion in the harness housing portion, and is provided with a cover connecting portion that connects adjacent covers along the parallel direction, wherein the cover connecting portion expands and contracts in the parallel direction.

[0029] Thus, a busbar holding member for holding a busbar attached to a battery unit in which multiple batteries are arranged in parallel is provided, comprising a plurality of holding member bodies each having a busbar holding portion for holding the busbar electrically connected to the batteries and a harness housing portion for housing a harness electrically connected to the busbar, and a connecting portion for connecting the plurality of holding member bodies arranged in parallel, wherein the connecting portion is configured to expand and contract in the parallel direction, so that the plurality of holding member bodies are connected to each other via the connecting portion that expands and contracts in the parallel direction, the busbar held by the busbar holding portion can move in the parallel direction to follow the displacement in the parallel direction due to the thermal expansion of the batteries. Therefore, even if the plurality of batteries expand in the parallel direction due to heat, a good connection between the busbar and the batteries can be maintained.

[0030] Furthermore, the connecting portion connects the harness housing portions that are arranged in the parallel direction. This allows multiple harness housing portions, which are arranged in a parallel direction that coincides with the wiring direction (longitudinal direction) of the harness, to be connected by the connecting portion. As a result, the busbar held by the busbar holding portion can move stably along the parallel direction via the connecting portion and the harness housing portions, following the displacement in the parallel direction due to the thermal expansion of the battery.

[0031] Furthermore, the harness housing portion has a bottom portion extending in the parallel direction, and the connecting portion connects adjacent bottom portions in the parallel direction. As a result, when obtaining a configuration in which the bottom portions are connected via the connecting portion by molding, it becomes easier to align the direction of pressure applied by the molding die between the bottom portion and the connecting portion, thus enabling good molding.

[0032] Furthermore, by connecting the connecting parts to each of the adjacent bottom sections, workers can easily visually inspect and access both the bottom section and the connecting parts from orthogonal directions perpendicular to the parallel and width directions, thus enabling efficient connection work.

[0033] Also, The harness housing has a cover facing the bottom, and a cover connecting portion is provided that connects adjacent covers along the parallel direction, and the cover connecting portion extends and retracts in the parallel direction. By being there, Since adjacent covers in the parallel direction are connected to each other via the cover connecting portion that expands and contracts in the parallel direction, the holding member body can move in the parallel direction together with the covers.

[0034] In another aspect of this invention, the cover may be positioned across the portion between adjacent harness housings. This invention makes it possible to avoid the formation of extremely low-rigidity sections in the parallel direction by arranging a cover connecting section with lower rigidity (bending rigidity) than the cover and a connecting section with lower rigidity (bending rigidity) than the main body of the retaining member at different positions in the parallel direction, thereby ensuring the necessary overall rigidity.

[0035] In another aspect of this invention, the holding member bodies may be arranged in pairs with an axis along the parallel direction as the axis of symmetry, and the connecting portion may be positioned at different positions in the parallel direction between the pair of holding member bodies that are arranged in pairs.

[0036] This invention makes it possible to ensure overall bending rigidity by positioning the low-rigidity connecting portion in a plurality of holding member bodies arranged in parallel at different positions between a pair of the holding member bodies arranged in a pair. [Effects of the Invention]

[0037] According to this invention, it is possible to provide a busbar holding member and a battery module that can maintain a good connection between the busbar and the batteries even when multiple batteries expand in a parallel direction. [Brief explanation of the drawing]

[0038] [Figure 1] A schematic perspective view of the battery module of this embodiment, viewed from above. [Figure 2] Exploded perspective view of the battery module of this embodiment [Figure 3] Enlarged view of the busbar retaining member in region X1 of Figure 1. [Figure 4] Enlarged view of the cover shown by dashed lines in Figure 3. [Figure 5] (a) is a right side view of the busbar holding member in area X3 of Figure 4, and (b) is a top view of the same. [Figure 6](a) is a right side view of the busbar holding member in area X2 of Figure 1, and (b) is a top view of the same. [Figure 7] (a) is a right side view of Figure 5 with the connecting section extended, and (b) is a top view of the same. [Figure 8] (a) is a right side view of Figure 6 with the cover connecting portion extended, and (b) is a top view of the same. [Figure 9] (a) is a right side view showing the connecting part of the modified example, corresponding to Figure 5(a), and (b) is a top view of the same. [Modes for carrying out the invention]

[0039] One embodiment of this invention will be described below with reference to the drawings. Figure 1 shows a schematic perspective view of the battery module 1 viewed from above, and Figure 2 shows a roughly exploded perspective view of the battery module 1. Figure 3 shows an enlarged view of the busbar retaining member 5 in region X1 of Figure 1, and Figure 4 shows an enlarged view of the cover 60 in Figure 3, indicated by dashed lines.

[0040] Here, the vertical direction in Figure 1 is defined as the height direction H, and the direction in which the multiple battery cells 20 are arranged in parallel in Figure 1 is defined as the parallel direction L. Here, the height direction H and the parallel direction L are orthogonal to each other. The direction orthogonal to the parallel direction L and the height direction H is defined as the width direction W. In Figure 1, the left side along the parallel direction L is defined as the tip side LF, and the right side in Figure 1 is defined as the base side LB. Along the width direction W, the left side is defined as the left side WL, and the right side is defined as the right side WR. Also, the upper side along the height direction H is defined as the upper side HU, and the lower side is defined as the lower side HD.

[0041] As shown in Figures 1 and 2, the battery module 1 consists of a battery unit 2 in which a plurality of battery cells 20 are arranged in parallel along the parallel direction L, a plurality of conductive members 3 electrically connected to the battery cells 20, a wire harness 4 electrically connected to the conductive members 3, and a busbar holding member 5 that holds the conductive members 3.

[0042] The battery unit 2 consists of multiple battery cells 20 arranged in parallel along the parallel direction L. In other words, the battery cells 20 are stacked along the parallel direction L. The battery cell 20 comprises a flat, roughly box-shaped battery body 21 and bolt-shaped positive terminal 22 and negative terminal 23 that protrude upward HU from the top surface of the battery body 21. The positive terminal 22 and negative terminal 23 protrude from both ends of the battery body 21 in the width direction W.

[0043] The battery cells 20 configured in this way are stacked along the parallel direction L as described above. More specifically, the multiple battery cells 20 are arranged along the parallel direction L such that the upper surfaces of the battery bodies 21 are on the same plane, and the positive terminals 22 and negative terminals 23 of adjacent battery bodies 21 are adjacent to each other. In other words, the battery bodies 21 of the battery cells 20 are arranged along the parallel direction L such that the positive terminals 22 and negative terminals 23 alternately face opposite directions.

[0044] As shown in Figures 1 and 2, multiple conductive members 3 are arranged along the parallel direction L on each side of the width direction W of the busbar holding member 5. The conductive members 3 are connected to the positive terminal 22 and negative terminal 23 of the battery cells 20 which are arranged in parallel. As shown in Figure 2, the conductive member 3 consists of a connecting busbar 30a and two single busbars 30b positioned at both ends in the parallel direction L.

[0045] As shown in Figure 2, the wire harness 4 consists of a main line 4a made up of bundled insulated wires, and multiple branch lines 4b made up of individual insulated wires branching off from the main line 4a. The insulated wire consists of a conductor located in the center and an insulating coating that covers the outside of the conductor. At the tip of the insulated wire, a portion of the insulating coating has been stripped, exposing the conductor. This exposed conductor is welded to the conductive member 3. Furthermore, the welding method for welding the conductor to the conductive member 3 can be any appropriate welding method such as ultrasonic welding, vibration welding, or laser welding.

[0046] As shown in Figures 1 to 4, the busbar holding member 5 comprises a plurality of holding member bodies 50 on which the conductive members 3 are arranged, and a plurality of covers 60 that cover the top of the holding member bodies 50. As shown in Figures 3 and 4, the holding member body 50 includes a harness housing section 51 that houses the wire harness 4 along the parallel direction L, and a plurality of busbar holding sections 52 that hold conductive members 3 that are electrically connected to the battery cell 20.

[0047] As shown in Figure 4, the harness housing section 51 is composed of a flat plate-shaped bottom section 511 extending along the parallel direction L, and side wall sections 512 erected from both ends of the bottom section 511 in the width direction W toward the upper side HU. That is, the harness housing section 51 is formed in a concave cross-section having an opening D that opens toward the upper side HU, and a housing space S is formed for housing the main line 4a of the wire harness 4, which is made up of bundled insulated wires. Of the pair of side wall portions 512, the right side wall portion 512 is designated as the right side wall portion 512R, and the left side wall portion 512 is designated as the left side wall portion 512L.

[0048] As shown in Figure 2, the holding member body 50, i.e., the harness housing section 51, configured in this way, is arranged in a row of three along the parallel direction L. The busbar holding member 5 is composed of three harness housing sections 51 arranged along the parallel direction L, forming a connecting housing section 55 that extends along the parallel direction L. The connecting housing sections 55 are arranged in pairs with the axis along the parallel direction L as the axis of symmetry. Each pair of connecting housing sections 55 is formed by resin molding in an elongated linear shape and is arranged parallel to each other at a predetermined distance in the width direction W.

[0049] Here, as shown in Figure 2, of the pair of connecting housings 55, the right connecting housing 55 is designated as the right connecting housing 55R, and the left connecting housing 55 is designated as the left connecting housing 55L. Furthermore, in the right connecting housing 55R, the three harness housings 51 arranged along the parallel direction L are designated as the front harness housing 51Ra, the intermediate harness housing 51Rb, and the base harness housing 51Rc, respectively, from the front LF to the base LB.

[0050] Similarly, in the left-side connecting housing section 55L, the three harness housing sections 51 arranged along the parallel direction L are designated as the front-end harness housing section 51La, the intermediate harness housing section 51Lb, and the base-end harness housing section 51Lc, respectively, from the front-end side LF to the base-end side LB.

[0051] Furthermore, as shown in Figure 2, the pair of connecting housings 55 are formed such that the lengths L in the parallel direction are the same and their positions L in the parallel direction coincide. However, the tip-side harness housing 51La is formed such that the length L in the parallel direction is longer than that of the tip-side harness housing 51Ra, the base-side harness housing 51Lc is formed such that the length L in the parallel direction is shorter than that of the base-side harness housing 51Rc, and the intermediate harness housings 51Rb and intermediate harness housings 51Lb are formed such that the lengths L in the parallel direction are the same.

[0052] As a result, as shown in Figures 2 and 4, the multiple harness housings 51 arranged in parallel direction L have the positions of the intermediate portions (50A) between the left-side connecting housing 55L and the right-side connecting housing 55R at different positions in the parallel direction L.

[0053] For example, as shown in Figure 4, the portion (50A) between the front harness housing 51Ra and the intermediate harness housing 51Rb in the right-side connecting housing 55R is located further towards the front LF than the portion (50A) between the front harness housing 51La and the intermediate harness housing 51Lb in the left-side connecting housing 55L.

[0054] Similarly, as shown in Figure 2, the portion (50A) between the intermediate harness housing 51Rb and the base-side harness housing 51Rc in the right-side connecting housing 55R is located further forward LF than the portion (50A) between the intermediate harness housing 51Rb and the base-side harness housing 51Rc in the left-side connecting housing 55L.

[0055] As shown in Figure 2, the pair of connecting housings 55 are integrally connected via an end connecting portion 56 and a central connecting portion 57. The end connecting portion 56 is provided at both ends of the pair of connecting housing portions 55 in the parallel direction L. The end connecting portion 56 consists of a connecting bottom portion 561 that connects the bottom portions 511 together along the width direction W, and a pair of connecting wall portions 562 that are erected from both ends of the connecting bottom portion 561 in the parallel direction L.

[0056] The connecting bottom portion 561 is integrally formed with the bottom portion 511, and the connecting wall portion 562 is integrally formed with the side wall portion 512. The space formed by these connecting bottom portion 561 and the pair of connecting wall portions 562 is formed to accommodate the wire harness 4, similar to the accommodation space S. Multiple central connecting sections 57 are provided in the space between the ends of the pair of connecting housing sections 55 in the parallel direction L. The end of the left WL of the central connecting section 57 is connected to the end of the left connecting housing section 55L, and the end of the right WR is connected to the end of the right connecting housing section 55R.

[0057] As shown in Figure 2, a plurality of busbar holding portions 52 are provided on both outer sides in the width direction W of a pair of connecting housing portions 55 that are arranged in pairs in the width direction W. Specifically, the plurality of busbar holding portions 52 are arranged at predetermined intervals along the parallel direction L, and each extends outward in the width direction W from the outer edge in the width direction W of the bottom portion 511 of the left and right harness housing portions 51, respectively.

[0058] Each of the multiple busbar holders 52 is equipped with a conductive member 3. The busbar holder 52 individually holds the multiple conductive members 3.

[0059] Furthermore, as shown in Figure 4, the left side wall 512L of the left harness housing 51 and the right side wall 512R of the right harness housing 51 are provided with multiple insertion openings 53 in a parallel direction L at predetermined intervals, through which insulated wires forming branch lines 4b branching off from the main line 4a are inserted.

[0060] The insertion opening 53 is formed at a predetermined position in the parallel direction L of the side wall portion 512, penetrating from the upper end to the lower end of the side wall portion 512 in the thickness direction (width direction W), and has a concave cross-section with an opening on the upper side HU. Furthermore, the distance between adjacent insertion ports 53 in the parallel direction L is equal to twice the distance between the battery body 21 and the adjacent negative terminal 23 in the battery cell 20.

[0061] The branch wires 4b that branch off from the main line 4a are led out from the housing space S to the outside in the width direction W through the insertion opening 53, and as described above, the tips of the insulated wires forming the branch wires 4b are electrically connected to the conductive member 3.

[0062] As shown in Figure 3, the cover 60 has a flat top surface portion 61 that extends in the width direction W and the parallel direction L so as to be able to close the opening D (see Figure 4) of the pair of harness housing portions 51 in the retaining member body 50. The top surface portion 61 faces the bottom portion 511 of the harness housing portion 51 across the housing space S (see Figure 4).

[0063] As shown in Figures 1 and 2, three of the covers 60 configured in this way are arranged side by side along the parallel direction L on each of the left and right sides of the busbar holding member 5.

[0064] As shown in Figures 2 and 3, a connecting cover portion 65 extending along the parallel direction L is formed by three covers 60 arranged along the parallel direction L. As shown in Figure 2, the connecting cover portions 65 are arranged in pairs with the axis along the parallel direction L as the axis of symmetry.

[0065] More specifically, the pair of connecting cover portions 65 are each formed by resin molding in an elongated straight shape, and are arranged parallel to each other at a predetermined distance in the width direction W, and are connected to each other in the width direction W via end cover connecting portions 63. The end cover connecting portions 63 are provided at both ends of the pair of connecting cover portions 65 in the parallel direction L.

[0066] Here, as shown in Figures 1 and 2, of the pair of connecting cover sections 65, the right connecting cover section 65 is designated as the right connecting cover section 65R, and the left connecting cover section 65 is designated as the left connecting cover section 65L. Furthermore, as shown in Figure 2, in the right connecting cover section 65R, the three covers 60 arranged along the parallel direction L are designated as the front end cover 60Ra, the intermediate cover 60Rb, and the base end cover 60Rc, respectively, from the front end LF to the base end LB.

[0067] Similarly, in the left-side connecting cover section 65L, the three covers 60 arranged along the parallel direction L are designated as the front end cover 60La, the intermediate cover 60Lb, and the base end cover 60Lc, respectively, from the front end LF to the base end LB.

[0068] Furthermore, as shown in Figure 2, the pair of connecting cover portions 65 are formed such that the lengths L in the parallel direction are the same and their positions L in the parallel direction coincide. However, the tip-side cover 60La is formed to have a longer length L in the parallel direction than the tip-side cover 60Ra, the base-side cover 60Lc is formed to have a shorter length L in the parallel direction than the base-side cover 60Rc, and the intermediate cover 60Rb and intermediate cover 60Lb are formed to have the same length L in the parallel direction.

[0069] As a result, the multiple covers 60 arranged in parallel direction L have the positions of their respective intervening portions 60A in the parallel direction L, with respect to the left-side connecting cover portion 65L and the right-side connecting cover portion 65R.

[0070] For example, in the right-side connecting cover section 65R, the portion 60A between the front-end cover 60Ra and the intermediate cover 60Rb is located further towards the front LF than the portion 60A between the front-end cover 60La and the intermediate cover 60Lb in the left-side connecting cover section 65L.

[0071] Similarly, in the right-side connecting cover section 65R, the portion 60A between the intermediate cover 60Rb and the base-side cover 60Rc is located further forward LF than the portion 60A between the intermediate cover 60Rb and the base-side cover 60Rc in the left-side connecting cover section 65L.

[0072] Furthermore, as shown in Figure 2, the cover 60 is positioned across the space (50A) between adjacent harness housings 51 in the parallel direction L. In this embodiment, in the left-side connecting cover portion 65L, the intermediate cover 60Lb is positioned across the portion (50A) between the tip-side harness housing portion 51La and the intermediate harness housing portion 51Lb, and also across the portion (50A) between the intermediate harness housing portion 51Lb and the base-side cover 60Lc.

[0073] Similarly, in the right-side connecting cover portion 65R, the intermediate cover 60Rb is positioned across the portion (50A) between the tip-side harness housing portion 51Ra and the intermediate harness housing portion 51Rb, and also across the portion (50A) between the intermediate harness housing portion 51Rb and the base-side cover 60Rc.

[0074] Furthermore, as shown in Figure 3, the busbar holding member 5 is provided with multiple mounting portions 70 along the parallel direction L for attaching the harness housing portion 51 and the cover 60 to each other. The mounting portions 70 allow adjacent harness housing portions 51 in the parallel direction L to move relative to each other along the parallel direction L via the cover 60.

[0075] Specifically, the mounting portion 70 consists of a locking projection 71 provided on the side wall portion 512 and a locking frame portion 75 provided on the cover 60 that can be detachably locked to the locking projection 71.

[0076] In the locking frame portion 75, the locked portion 77 into which the locking projection 71 is locked is a rod-shaped portion longer than the length L in the parallel direction of the locking projection 71 and is configured along the parallel direction L. Therefore, the locked portion 77 can guide the movement of the engaged locking projection 71 along the parallel direction L. In other words, the locking projection 71 can move along the parallel direction L while locked to the locked portion 77.

[0077] In other words, even when the locking projection 71 is locked to the locked portion 77, there is still play between them, so that one of the adjacent harness housing portions 51 can move relative to the other in the parallel direction L via the cover 60.

[0078] Figure 5(a) shows a right side view of the busbar holding member 5 in region X3 of Figure 4, and Figure 5(b) shows a top view of the same. As shown in Figures 5(a) and 5(b), the connecting portion 80 is provided in the space (50A) between multiple holding member bodies 50 arranged along the parallel direction L, and connects adjacent holding member bodies 50 in the parallel direction L to each other.

[0079] As shown in Figures 4 and 5(a) and 5(b), the connecting portion 80 consists of a first connecting portion 81 that connects the side wall portions 512 of adjacent harness housing portions 51 in the parallel direction L, and a second connecting portion 82 that connects the bottom portions 511 of adjacent harness housing portions 51 in the parallel direction L. The first connecting portion 81 is formed on the side wall portions 512 on both sides in the width direction W of the harness housing portion 51.

[0080] The connecting portion 80 is formed in a strip shape extending in the parallel direction L, and has a thickness thinner than the plate thickness of the side wall portion 512 and bottom portion 511 of the harness housing portion 51, so as to be flexibly deformable in the thickness direction of the connecting portion 80. The connecting portion 80 is formed in a wave shape along the parallel direction L, that is, a wave shape that amplifies in a direction perpendicular to the parallel direction L, so as to expand and contract in the parallel direction L by bending and deforming. In this embodiment, the connecting portion 80 is formed in a wave shape consisting of one wavelength, and the wave-shaped portion 80a of the connecting portion 80 protrudes in the middle toward the opposite side of the housing space S, that is, toward the outside of the harness housing portion 51, relative to both ends in the parallel direction L.

[0081] More specifically, as shown in Figure 5(b), the right first connecting portion 81R, which connects the right side wall portions 512R together, protrudes toward the right side WR, the left first connecting portion 81L, which connects the left side wall portions 512L together, protrudes toward the left side WL, and as shown in Figure 5(a), the second connecting portion 82 protrudes toward the lower side HD. As a result, as shown in Figures 7(a) and 7(b), the connecting portion 80 extends in a direction that coincides with the parallel direction L.

[0082] Furthermore, the connecting portion 80 may be formed by either the first connecting portion 81 or the second connecting portion 82. Also, the first connecting portion 81 is not limited to being formed on both sides in the width direction W, but may be formed on only one side in the width direction W. That is, the connecting portion 80 may be formed by either the right first connecting portion 81R or the left first connecting portion 81L.

[0083] As shown in Figures 2, 3, and 6(a)(b), the cover connecting portion 66 is provided to expand and contract in the parallel direction L and to connect multiple covers 60 arranged in parallel in the parallel direction L.

[0084] Specifically, the multiple covers 60 are arranged adjacent to each other along the parallel direction L, with a gap between their opposing ends. The cover connecting portion 66 is provided in the space between the multiple covers 60 arranged along the parallel direction L, and connects these adjacent covers 60 to each other.

[0085] The cover connecting portion 66 is configured to connect the top surfaces 61 of adjacent covers 60 in the parallel direction L. The cover connecting portion 66 is formed in a strip shape extending in the parallel direction L and has a thickness thinner than the plate thickness of the top surface 61 of the cover 60 so that it can be flexibly deformed in the thickness direction of the cover connecting portion 66. The cover connecting portion 66 is formed in a wave shape along the parallel direction L, that is, a wavy shape that amplifies in the height direction H, so that it expands and contracts in the parallel direction L by flexing. In this embodiment, the cover connecting portion 66 is formed in a wave shape consisting of one wavelength, and the wave-shaped portion 66a of the cover connecting portion 66 protrudes in the middle toward the opposite side of the housing space S, that is, toward the outside of the harness housing portion 51, relative to both ends in the connecting direction. In this embodiment, the cover connecting portion 66 protrudes toward the upper side HU. As a result, as shown in Figures 8(a) and 8(b), the cover connecting portion 66 extends in a direction that coincides with the parallel direction L.

[0086] The busbar holding member 5 of this embodiment described above can provide the following effects. As shown in Figures 1 to 5(a) and 5(b), the multiple holding member bodies 50 are connected to each other via connecting parts 80 that expand and contract in the parallel direction L. Therefore, the conductive member 3 held by the busbar holding part 52 can move in the parallel direction L to follow the positional displacement in the parallel direction L caused by the thermal expansion of the battery cells 20. Consequently, even if the multiple battery cells 20 expand thermally in the parallel direction L, a good connection between the conductive member 3 and the battery cells 20 can be maintained.

[0087] In addition to the effects described above, the busbar holding member 5 of this embodiment can provide the following effects. As shown in Figures 2 and 4, in this embodiment, multiple harness housing sections 51 are arranged along the parallel direction L so as to accommodate the wire harness 4, and are therefore arranged along the longitudinal direction of the wire harness 4 in a state that coincides with the width direction W of the wire harness 4. In this embodiment, the busbar holding member 5 connects these harness housing sections 51 to each other with connecting sections 80 that expand and contract in the parallel direction L, so that the conductive member 3 held by the busbar holding section 52 can move stably along the parallel direction L via the connecting sections 80 and the harness housing sections 51 in response to the displacement in the parallel direction L due to the thermal expansion of the battery cell 20.

[0088] As shown in Figures 4 and 5(a)(b), the connecting portion 80 of this embodiment is configured to connect adjacent bottom portions 511 in the parallel direction L. Therefore, for example, when obtaining a configuration in which bottom portions 511 are connected via the connecting portion 80 by molding, it becomes easier to align the direction of pressure applied by the mold between the bottom portions 511 and the connecting portion 80, thus enabling good molding.

[0089] Furthermore, by connecting the connecting portion 80 to each of the adjacent bottom portions 511, when the bottom portions 511 are connected to each other via the connecting portion 80, the worker can easily visually inspect and access both the bottom portion 511 and the connecting portion 80 from the upper HU relative to the harness housing portion 51, thus enabling smooth connection work.

[0090] As shown in Figures 4 and 5(b), in this embodiment, the busbar holding member 5 connects adjacent side wall portions 512 in the parallel direction L on both sides of the width direction W of the bottom portion 511 with a first connecting portion 81. As a result, each of the connecting portions 80 on both sides of the width direction W of the bottom portion 511 expands and contracts in the parallel direction L, so that the multiple holding member bodies 50 can suppress positional displacement in the width direction W when moving in the parallel direction L.

[0091] As shown in Figures 4 and 5(a) and 5(b), in this embodiment, the busbar holding member 5 is configured such that multiple holding member bodies 50 are connected via a second connecting portion 82 positioned along the bottom portion 511 and a first connecting portion 81 positioned along a side wall portion 512 erected relative to the bottom portion 511. This allows for movement in the parallel direction L while suppressing misalignment in the width direction W and height direction H.

[0092] As shown in Figures 4 and 5(a) and 5(b), the connecting portion 80 of this embodiment is formed in a wave-like shape along the connecting direction, so it can expand to follow the positional displacement in the parallel direction L caused by the thermal expansion of the battery cells 20. In contrast, when the battery cells 20 cool after thermal expansion, the connecting portion 80 that expanded due to thermal expansion contracts in a wave-like shape from the positional displacement, thus achieving a more compact design.

[0093] As shown in Figures 5(a) and 5(b), the connecting portion 80 in this embodiment is formed to be thinner than the plate thickness of the harness housing portion 51 to which the connecting portion 80 is connected, making it easier to flex and deform, thereby increasing its elasticity. As a result, the multiple holding member bodies 50 can move more easily in the parallel direction L. In other words, the ability of the multiple holding member bodies 50 to follow positional displacement due to thermal expansion of the battery cell 20 can be improved.

[0094] As shown in Figures 5(a) and 5(b), the wave-shaped portion 80a of the connecting portion 80 in this embodiment protrudes in the direction opposite to the accommodation space S, thereby preventing the connecting portion 80 from entering the accommodation space S.

[0095] As shown in Figures 6(a) and 6(b), the cover connecting portion 66 of this embodiment connects the covers 60 so that they can be extended and retracted in the parallel direction L, so that the holding member body 50 can move together with the cover 60 in the parallel direction L.

[0096] As shown in Figures 2 and 4, the cover 60 of this embodiment is positioned across adjacent harness housing sections 51, allowing the cover connecting section 66, which has lower rigidity (bending rigidity) than the cover 60, and the connecting section 80, which has lower rigidity (bending rigidity) than the holding member body 50, to be positioned at different locations in the parallel direction L. This avoids the formation of a section with extremely low rigidity in the parallel direction L, and ensures the necessary rigidity for the busbar holding member 5 as a whole.

[0097] As shown in Figures 2 and 4, in this embodiment, the busbar holding member 5 has a connection portion 80 that is lower in rigidity (bending rigidity) than the holding member body 50. In this embodiment, the positions of the connection portion 80 in the parallel direction L are arranged in pairs and are positioned differently between the left and right pair of connection housing portions 55. This avoids the formation of a portion with extremely low rigidity in the parallel direction L, and ensures the necessary rigidity overall.

[0098] Furthermore, this invention is not limited to the configuration of the embodiments described above, and many other embodiments can be obtained. For example, the busbar holding member of the present invention is not limited to the connecting portion 80 provided in the busbar holding member 5 of the embodiment described above, but may also have a configuration that includes other connecting portions 80A. A modified busbar holding member 5A with a connecting portion 80A will be described below, but components similar to those of the busbar holding member 5 described above will be denoted by the same reference numerals and their descriptions will be omitted. For example, as shown in Figures 9(a) and 9(b), the connecting portion 80A may be formed in a corrugated shape that protrudes toward the accommodation space S in the harness accommodation portion 51.

[0099] Specifically, in the modified busbar holding member 5A, the right first connecting portion 81AR, the left first connecting portion 81AL, and the second connecting portion 82A are all formed in a corrugated shape that protrudes toward the housing space S.

[0100] More specifically, as shown in Figure 9(b), the wave-shaped portion 80Aa of the right-side first connecting portion 81AR protrudes toward the left-side WL, the left-side first connecting portion 81AL protrudes toward the right-side WR, and as shown in Figure 9(a), the second connecting portion 82 protrudes toward the upper-side HU.

[0101] In this way, by forming the connecting portion 80A in a wave shape that protrudes toward the housing space S in the harness housing portion 51, and not protruding to the outside of the housing space S, interference between the connecting portion 80A and the surrounding members located outside the harness housing portion 51 can be suppressed.

[0102] Furthermore, the connecting portion of the present invention may be formed by combining a wave shape that protrudes toward the opposite side of the accommodation space S and a wave shape that protrudes toward the accommodation space S.

[0103] The cover connecting portion 66 is not limited to being formed in a corrugated shape that protrudes toward the opposite side of the housing space S, as in the embodiment described above, but may also be formed in a wave shape that protrudes toward the housing space S.

[0104] Furthermore, when the connecting portion of the present invention is formed in a wave shape, the period, amplitude, and wavelength are not particularly limited, and may be, for example, a half-wavelength wave consisting only of the crest portion of the wave. Also, the wave-shaped connecting portion is not limited to a single wave shape, but may be a wave shape in which multiple waves with at least one different period, amplitude, and wavelength are connected in series in the connecting direction.

[0105] In the correspondence between the configuration of this invention and the embodiments described above, the busbar corresponds to the conductive member 3, and so on. The harness is compatible with wire harness 4. The battery corresponds to battery cell 20, The portion between adjacent harness housings is the portion between adjacent retaining member bodies 50A It corresponds to. [Explanation of Symbols]

[0106] 1…Battery module 2…Battery unit 3… Conductive member 4…Wire harness 5…Bus bar retaining member 20…Battery cells 50…Main body of the retaining member 50A... The portion between adjacent holding member bodies in a parallel direction 52...Bus bar holder 51...Harness housing 60...cover 66... ​​Cover connection part 80,80A…Connection part 80a, 80Aa... Corrugated portion at the connecting section 81R, 81AR…1st connection part 81L, 81AL…Second connection section 511...Bottom 512... Side wall section S... Containment space L…Parallel direction

Claims

1. A busbar holding member for holding a busbar attached to a battery unit in which multiple batteries are arranged in parallel, A plurality of holding member bodies, each having a busbar holding portion for holding the busbar electrically connected to the battery, and a harness housing portion for housing a harness electrically connected to the busbar, A connecting portion is provided for connecting a plurality of the holding member bodies arranged along the parallel direction, The connecting portion is configured to expand and contract in the parallel direction, The connecting portion connects the harness housing portions that are arranged in the parallel direction, The harness housing section is, It has a bottom portion extending in the parallel direction and a pair of side wall portions erected from both ends of the bottom portion in the width direction, The connecting portion connects adjacent side wall portions in the parallel direction. Busbar retaining member.

2. A busbar holding member for holding a busbar attached to a battery unit in which multiple batteries are arranged in parallel, A plurality of holding member bodies, each having a busbar holding portion for holding the busbar electrically connected to the battery, and a harness housing portion for housing a harness electrically connected to the busbar, A connecting portion is provided for connecting a plurality of the holding member bodies arranged along the parallel direction, The connecting portion is configured to expand and contract in the parallel direction, The connecting portion connects the harness housing portions that are arranged in the parallel direction, The harness housing section is, It has a bottom portion extending in the parallel direction and a pair of side wall portions erected from both ends of the bottom portion in the width direction, The aforementioned connecting portion is A first connecting portion that connects adjacent side wall portions in the parallel direction, It is composed of a second connecting portion that connects adjacent bottom portions in the parallel direction. Busbar retaining member.

3. The connecting portion is formed in a wave-like shape that is wavy along the connecting direction. The busbar holding member according to claim 1.

4. The connecting portion is formed in a wave-like shape that is wavy along the connecting direction. The busbar holding member according to claim 2.

5. A busbar holding member for holding a busbar attached to a battery unit in which multiple batteries are arranged in parallel, A plurality of holding member bodies, each having a busbar holding portion for holding the busbar electrically connected to the battery, and a harness housing portion for housing a harness electrically connected to the busbar, A connecting portion is provided for connecting a plurality of the holding member bodies arranged along the parallel direction, The connecting portion is configured to expand and contract in the parallel direction, The connecting portion connects the harness housing portions that are arranged in the parallel direction, The harness housing section is, Having a bottom that extends in the parallel direction, The connecting portion connects the bottom portions adjacent to each other in the parallel direction, The connecting portion is formed in a wave-like shape that is wavy along the connecting direction. Busbar retaining member.

6. The connecting portion is thinner than the plate thickness of the harness housing portion to which the connecting portion is connected. A busbar holding member according to any one of claims 3 to 5.

7. The connecting portion is formed in a wave shape that protrudes toward the housing space that houses the harness in the harness housing portion. A busbar holding member according to any one of claims 3 to 5.

8. The wave-shaped portion of the connecting part protrudes in the direction opposite to the housing space. The busbar holding member according to claim 7.

9. A busbar holding member for holding a busbar attached to a battery unit in which multiple batteries are arranged in parallel, A plurality of holding member bodies, each having a busbar holding portion for holding the busbar electrically connected to the battery, and a harness housing portion for housing a harness electrically connected to the busbar, A connecting portion is provided for connecting a plurality of the holding member bodies arranged along the parallel direction, The connecting portion is configured to expand and contract in the parallel direction, The connecting portion connects the harness housing portions that are arranged in the parallel direction, The harness housing section is, Having a bottom that extends in the parallel direction, The connecting portion connects the bottom portions adjacent to each other in the parallel direction, The harness housing section has a cover facing the bottom, A cover connecting portion is provided that connects adjacent covers along the parallel direction, The cover connecting portion expands and contracts in the parallel direction. Busbar retaining member.

10. The cover is positioned across the portion between adjacent harness housings. The busbar holding member according to claim 9.

11. Multiple batteries arranged in parallel, A busbar electrically connected to the aforementioned battery, A busbar holding member that holds the busbar, The busbar and the harness are electrically connected to each other. The busbar holding member is A plurality of holding member bodies have a busbar holding portion for holding the busbar and a harness housing portion for housing the harness, and a plurality of the busbar holding portions are arranged along the parallel direction in which the batteries are arranged, The holding member body is provided with a connecting portion that connects adjacent holding member bodies in the parallel direction, The connecting portion is configured to expand and contract in the parallel direction, The connecting portion connects the harness housing portions that are arranged in the parallel direction, The harness housing section is, It has a bottom portion extending in the parallel direction and a pair of side wall portions erected from both ends of the bottom portion in the width direction, The connecting portion connects adjacent side wall portions in the parallel direction. Battery module.

12. Multiple batteries arranged in parallel, A busbar electrically connected to the aforementioned battery, A busbar holding member that holds the busbar, The busbar and the harness are electrically connected to each other. The busbar holding member is A plurality of holding member bodies have a busbar holding portion for holding the busbar and a harness housing portion for housing the harness, and a plurality of the busbar holding portions are arranged along the parallel direction in which the batteries are arranged, The holding member body is provided with a connecting portion that connects adjacent holding member bodies in the parallel direction, The connecting portion is configured to expand and contract in the parallel direction, The connecting portion connects the harness housing portions that are arranged in the parallel direction, The harness housing section is, It has a bottom portion extending in the parallel direction and a pair of side wall portions erected from both ends of the bottom portion in the width direction, The aforementioned connecting portion is A first connecting portion that connects adjacent side wall portions in the parallel direction, It is composed of a second connecting portion that connects adjacent bottom portions in the parallel direction. Battery module.

13. Multiple batteries arranged in parallel, A busbar electrically connected to the aforementioned battery, A busbar holding member that holds the busbar, The busbar and the harness are electrically connected to each other. The busbar holding member is A plurality of holding member bodies have a busbar holding portion for holding the busbar and a harness housing portion for housing the harness, and a plurality of the busbar holding portions are arranged along the parallel direction in which the batteries are arranged, The holding member body is provided with a connecting portion that connects adjacent holding member bodies in the parallel direction, The connecting portion is configured to expand and contract in the parallel direction, The connecting portion connects the harness housing portions that are arranged in the parallel direction, The harness housing section is, Having a bottom that extends in the parallel direction, The connecting portion connects the bottom portions adjacent to each other in the parallel direction, The connecting portion is formed in a wave-like shape that is wavy along the connecting direction. Battery module.

14. Multiple batteries arranged in parallel, A busbar electrically connected to the aforementioned battery, A busbar holding member that holds the busbar, The busbar and the harness are electrically connected to each other. The busbar holding member is A plurality of holding member bodies have a busbar holding portion for holding the busbar and a harness housing portion for housing the harness, and a plurality of the busbar holding portions are arranged along the parallel direction in which the batteries are arranged, The holding member body is provided with a connecting portion that connects adjacent holding member bodies in the parallel direction, The connecting portion is configured to expand and contract in the parallel direction, The connecting portion connects the harness housing portions that are arranged in the parallel direction, The harness housing section is, Having a bottom that extends in the parallel direction, The connecting portion connects the bottom portions adjacent to each other in the parallel direction, The harness housing section has a cover facing the bottom, A cover connecting portion is provided that connects adjacent covers along the parallel direction, The cover connecting portion expands and contracts in the parallel direction. Battery module.

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