JP2018037184A - Battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent components of a battery module from being damaged by a fastening member for fastening a housing case of a controller while reducing the size of a module.SOLUTION: A battery module 1 according to one embodiment includes a plurality of battery cells 2, a bus bar cover 11, and a housing case 16 for housing a monitoring ECU 15. The housing case 16 is attached to a first cover member 12 so that the longitudinal direction of the housing case 16 is arranged along an arrangement direction of the battery cell 2. The housing case 16 includes a first case member 18 and a second case member 19 for respectively covering a lower surface and an upper surface of the monitoring ECU 15. Extending portions 186 and 197 are arranged at positions overlapped with a second cover member 13 as viewed from a Z-axis direction. The extending portion 186 extends outward of the housing case 16 at a position upper than a bottom plate portion 181. A lower end of a screw N4 is positioned between a lower surface 181b of the bottom plate portion 181 and the extending portion 186.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a battery module.

  A battery module in which a plurality of battery cells are arranged in series is known. The following Patent Document 1 describes an example in which a base is deformed or damaged by deformation of an outer wall in a configuration in which a control circuit is attached to the outer wall of a battery module via a base (FIG. 23B). In the following Patent Document 2, a configuration in which two cover members arranged along the arrangement direction of a plurality of battery cells cover one surface of a battery cell, and a control circuit (monitoring ECU) is provided on the upper surface of one cover member. Is described.

JP 2013-168357 A JP, 2006-048623, A

  In the battery module configured as described above, the housing case that houses the control circuit may include two case members that sandwich the upper and lower surfaces of the control circuit. Further, the two case members may be fastened by inserting a fastening member (such as a bolt) through an extending portion having an insertion hole provided in each case, and the tip of the fastening member may be exposed. is there. In this case, when an event as described in Patent Document 1 occurs or an impact is applied to the housing case, the leading end of the fastening member collides with the outer wall of the battery module and penetrates the battery module. There is a risk of damaging these components (for example, bus bar members, battery cell cases, etc.). Moreover, like the structure of the said patent document 2, when a some cover member covers one surface of a battery cell, the connection part of cover members can become a site | part especially weak to an impact on structure. Therefore, from the viewpoint of preventing damage to the components inside the battery module due to the fastening member when such an unexpected situation occurs, the extending portion is arranged at a position that does not overlap the connecting portion of the cover members. It is preferable.

  However, the longitudinal width of the housing case may be larger than the width of the cover member in the battery cell arrangement direction. In this case, if the storage case is arranged on the cover member so that the longitudinal direction of the storage case is along the arrangement direction of the battery cells, the extending portion may overlap the connection portion between the two cover members. In order to avoid such a situation, it is conceivable to arrange the storage case so that the longitudinal direction of the storage case is along the direction intersecting the arrangement direction of the battery cells. However, for that purpose, it is necessary to make the width of the cover member in the direction intersecting the arrangement direction of the battery cells, and hence the width of the battery module itself, larger than the width in the longitudinal direction of the housing case, and the battery module becomes large. Problems arise.

  Then, this invention aims at providing the battery module which can suppress damage to the component of a battery module by the fastening member which fastens the storage case of a control apparatus, aiming at size reduction of a module.

  A battery module according to an aspect of the present invention is disposed on the opposite side of a plurality of battery cells, a cover that covers one surface of the plurality of battery cells, and a plurality of battery cells across the cover, and monitors the state of the battery cells And a storage case for storing the control device, the cover has a first cover member and a second cover member arranged along the arrangement direction of the plurality of battery cells, the storage case, The housing case is attached to the first cover member so that the longitudinal direction thereof is along the arrangement direction, and is connected to the first case member that covers the first surface facing the cover of the control device, and the first case member. A second case member that covers a second surface opposite to the first surface of the device, and the first case member is a first base plate that faces the first surface of the control device, and is first than the bottom plate portion. In a position shifted from the surface toward the second surface A first extending portion extending outside the housing case, and the second case member is housed so as to face the top plate portion facing the second surface of the control device and the first extending portion. A second extending portion extending to the outside of the case, and the first extending portion and the second extending portion are a first insertion hole and a second extending provided in the first extending portion. The fastening member is inserted into the second insertion hole provided in the part, and the first extension part and the second extension part are viewed from the direction in which the cover and the battery cell face each other. It arrange | positions in the position which overlaps with a 2nd cover member, and the edge part by the side of the cover of a fastening member is located between the outer surface of a baseplate part, and a 1st extension part.

  In the battery module, the first extending portion extends outside the housing case at a position shifted in the direction from the first surface toward the second surface with respect to the bottom plate portion. As a result, the end portion on the cover side of the fastening member is located between the outer surface of the bottom plate portion and the first extending portion. That is, the cover-side end portion of the fastening member does not protrude toward the cover side from the plane along the outer surface of the bottom plate portion of the housing case. Thereby, for example, in the case where an impact is applied to the storage case and the extension part side of the storage case (the side where the first extension part and the second extension part are provided) is inclined so as to approach the cover, The possibility that the end of the fastening member on the cover side may collide with the cover can be reduced. In addition, since the possibility that the end portion on the cover side of the fastening member collides with the cover is reduced, the first extension portion and the second extension portion are second when viewed from the direction in which the cover and the battery cell face each other. The housing case can be attached to the first cover member while allowing it to overlap the cover member. That is, the storage case is attached to the first cover member such that the longitudinal direction of the storage case is along the arrangement direction of the battery cells. Thereby, it is not necessary to make the width of the cover in the direction intersecting the arrangement direction of the battery cells, and hence the width of the battery module itself, larger than the width in the longitudinal direction of the housing case, and the battery module is prevented from being enlarged. Therefore, according to the said battery module, damage to the component of a battery module by the fastening member of the storage case of a control apparatus can be suppressed, aiming at size reduction of a module.

  In the battery module, the second extending portion extends to the outside of the housing case at a position shifted in a direction from the second surface to the first surface with respect to the top plate portion, and the end of the fastening member on the cover side The end opposite to the portion may be located between the outer surface of the top plate portion and the second extending portion.

  In the said structure, the 2nd extension part is extended outside the accommodation case in the position shifted in the direction which goes to a 1st surface from a 2nd surface rather than a top-plate part. As a result, the end of the fastening member opposite to the cover side is positioned between the outer surface of the top plate and the second extension. That is, the end of the fastening member that is opposite to the end on the cover side does not protrude outward (on the side opposite to the direction approaching the cover) from the plane along the outer surface of the top plate portion of the housing case. Thereby, for example, even when an impact is applied to the housing case and the extending portion side of the housing case is inclined in a direction away from the cover, the end portion of the fastening member opposite to the cover side end portion is the other end portion. It is possible to prevent the other member from being damaged by colliding with the member. The “other members” referred to here are, for example, the outer wall of the battery pack that houses the battery module, and other battery modules that are housed in the battery pack.

  In the battery module, the first cover has a standing part standing on an outer surface facing the first case member of the first cover member, and the outer surface of the first cover member and the first case member are formed by the standing part. A space may be formed between the bottom plate portion and the bottom plate portion.

  A space is formed between the outer surface of the first cover member and the bottom plate portion of the first case member by the standing portion, thereby increasing the distance between the fastening member and the cover. As a result, when an impact is applied to the housing case and the extending portion side of the housing case is inclined in a direction approaching the cover, it is possible to further reduce the possibility that the end portion of the fastening member on the cover side collides with the cover.

  ADVANTAGE OF THE INVENTION According to this invention, the battery module which can suppress damage to the component of the battery module by the fastening member which fastens the storage case of a control apparatus, aiming at size reduction of a module can be provided.

It is a perspective view which shows the whole structure of the battery module of one Embodiment. It is a top view of the battery module shown in FIG. It is sectional drawing along the III-III line of FIG. It is a perspective view which shows a battery cell and a cell holder. It is a disassembled perspective view of monitoring ECU, a storage case, and a 1st cover member. It is a perspective view which shows a 2nd cover member and a 3rd cover member. FIG. 4 is a partial cross-sectional view taken along line VII-VII in FIG. 3. It is a bottom view of a bus-bar cover. It is a bottom view of the bus-bar cover which concerns on a modification. It is a bottom view of the bus-bar cover which concerns on a modification. It is a bottom view of the bus-bar cover which concerns on a modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a perspective view showing the overall configuration of the battery module of the present embodiment. FIG. 2 is a plan view of the battery module shown in FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. However, in FIG. 3, the structure in the case of the battery cell is omitted. FIG. 4 is a perspective view showing a battery cell and a cell holder. As shown in FIGS. 1 to 4, the battery module 1 has a plurality (for example, 13) of battery cells 2. Each battery cell 2 is arranged along one direction while being held by the cell holder 3. In the following description, the arrangement direction of the plurality of battery cells 2 is the X-axis direction, the width direction of the battery cells 2 (the arrangement direction of electrode terminals 8 and 8 described later) is orthogonal to the Y-axis direction, the X-axis direction, and the Y-axis direction. The height direction to be performed is the Z-axis direction. Further, in the following description, “up”, “down”, “left”, “right”, “rear”, where the X-axis direction is the horizontal direction, the Y-axis direction is the front-rear direction, and the Z-axis direction is the vertical direction , And “front” are used.

  As shown in FIGS. 1 and 2, a pair of end plates 4 </ b> A and 4 </ b> B are provided at both ends in the X-axis direction of the battery module 1. At both ends of the plurality of battery cells 2 arranged in the X-axis direction, end plates 4A and intermediate plates 5 are arranged. The end plates 4A and 4B and the intermediate plate 5 are formed in a rectangular flat plate shape with metal, for example. An elastic body 6 is disposed between the intermediate plate 5 and the end plate 4B. Bolts B are inserted through the end plates 4 </ b> A and 4 </ b> B, the intermediate plate 5, and each cell holder 3. The bolt B is inserted from one end plate 4A toward the other end plate 4B, and is screwed into the nut N on the other end plate 4B side. Thereby, each battery cell 2 is clamped and unitized. A predetermined restraining load is applied to each battery cell 2 and the elastic body 6 in the X-axis direction by the fastening force of the nut N.

  The elastic body 6 is a member used for the purpose of preventing damage to the battery cell 2, the end plates 4A and 4B, and the restraining members (bolts B and nuts N) due to restraint load when the battery cell 2 expands. is there. The elastic body 6 is formed in a rectangular plate shape by a rubber sponge made of urethane, for example. Examples of other forming materials of the elastic body 6 include ethylene propylene diene rubber (EPDM), chloroprene rubber, and silicon rubber.

  The battery cell 2 is a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery. The battery cell 2 is configured by accommodating an electrode assembly in a case 7 into which a non-aqueous electrolyte is injected. The electrode assembly is obtained by stacking a positive electrode, a negative electrode, and a separator in a predetermined order. As an example, a sheet-like positive electrode is accommodated in a bag-like separator, and a bag-like separator and a sheet-like negative electrode each containing a positive electrode are alternately stacked.

  As shown in FIGS. 3 and 4, the case 7 includes a bottomed box-shaped main body 71 that houses the electrode assembly, and a plate-shaped lid 72 that closes the opening of the main body 71. A pair of electrode terminals 8, 8 are provided on the upper surface 72 a of the lid portion 72 so as to be separated from each other. One of the electrode terminals 8 and 8 is a positive electrode terminal connected to the positive electrode of the electrode assembly, and the other of the electrode terminals 8 and 8 is a negative electrode terminal connected to the negative electrode of the electrode assembly. The adjacent battery cells 2 and 2 are arranged so that the positive electrode terminal and the negative electrode terminal are adjacent to each other, and are connected in series by connecting the adjacent positive electrode terminal and the negative electrode terminal with the bus bar 9. .

  An open valve 10 for discharging the gas in the case 7 is provided between the electrode terminals 8 and 8 on the upper surface 72 a of the lid portion 72. For example, when the internal pressure of the case 7 rises to a threshold value, the release valve 10 breaks and releases the gas in the case 7. The threshold value is set so that, for example, the release valve 10 is broken before the case 7 is damaged by the internal pressure of the case 7. The open valve 10 is an on-off valve that opens when the internal pressure of the case 7 becomes greater than the threshold value and does not break as described above, and closes when the internal pressure of the case 7 is equal to or lower than the threshold value. Also good.

  As shown in FIG. 4, the cell holder 3 includes a rectangular flat plate-like lower surface portion 31, a pair of side surface portions 32, 32, a side surface portion 33, a pair of leg portions 34, 34, a pair of terminal accommodating portions 35, 35, a pair of column members 36, 36, and a pair of projecting portions 37, 37.

  The lower surface portion 31 is a plate-like member that covers the bottom surface of the battery cell 2. The side surface portions 32 and 32 are plate-like members that are disposed so as to oppose each other at both ends in the Y-axis direction of the lower surface portion 31 and extend in the Z-axis direction. The side surfaces 32, 32 cover the side surfaces that intersect the Y-axis direction of the battery cell 2. The side surface portion 33 is a plate-like member that connects the side surface portions 32 and 32. The side surface portion 33 supports one of the main surfaces intersecting with the X-axis direction of the battery cell 2.

  The leg portions 34 and 34 are provided at the lower end portions of the side surface portions 32 and 32. The leg portion 34 is provided with an insertion hole 34a penetrating in the X-axis direction. The bolt B described above is inserted through the insertion hole 34a.

  The terminal accommodating portions 35 are provided at both ends of the upper end 33 a of the side surface portion 33 in the Y axis direction. The terminal accommodating portions 35 and 35 are provided so as to be connected to the side surface portions 32 and 32. The terminal accommodating portion 35 is a portion that surrounds the electrode terminal 8 of the battery cell 2 and opens in a U shape in the X-axis direction.

  The column members 36 and 36 are provided at positions adjacent to the terminal accommodating portions 35 and 35 on the upper end 33 a of the side surface portion 33. The column member 36 is a quadrangular columnar member extending in the X-axis direction. The column member 36 is provided with an insertion hole 36a penetrating in the X-axis direction. The bolt B described above is inserted into the insertion hole 36a.

  In the cell holder 3, a space S <b> 1 in which the battery cell 2 is accommodated is formed by a space surrounded by the lower surface portion 31, the side surface portions 32 and 32, the side surface portion 33, and the pillar members 36 and 36.

  The projecting portions 37 and 37 are portions that further extend in the Z-axis direction from the upper end positions of the side surface portions 32 and 32. A protrusion 38 that protrudes in the Y-axis direction is provided on the inner surface of the protrusions 37 and 37. The protrusion 38 is provided in order to prevent a bus bar cover 11 described later from being detached from the battery module 1 (see FIG. 3).

  As shown in FIGS. 1 to 3, the battery module 1 includes a bus bar cover 11 that covers the upper surfaces of the plurality of battery cells 2 (that is, the upper surface 72 a of the lid portion 72 provided with the release valve 10). The bus bar cover 11 includes a first cover member 12, a second cover member 13, and a third cover member 14 arranged along the X-axis direction. The first cover member 12, the second cover member 13, and the third cover member 14 are sequentially arranged from the intermediate plate 5 toward the end plate 4A. These cover members are formed of a synthetic resin such as 66 nylon having high flame retardancy, for example.

  As shown in FIGS. 1 and 2, a monitoring ECU (not shown) that is housed in a housing case 16 is disposed on the upper surface side of the first cover member 12 (on the side opposite to the plurality of battery cells 2 with the first cover member 12 interposed therebetween). Electronic Control Unit) 15 (control device) is arranged. The monitoring ECU 15 is an electronic component that monitors the state (for example, voltage) of the battery cell 2 and shuts off the discharge or the like when an abnormality of the battery cell 2 is detected. On the bus bar cover 11, electronic components (for example, a current sensor) other than the monitoring ECU 15, wiring, and the like may be provided.

  FIG. 5 is an exploded perspective view of the monitoring ECU, the housing case, and the first cover member. As shown in FIG. 5, the monitoring ECU 15 includes a rectangular plate-shaped substrate 151 and four connector receiving portions 152 </ b> A to 152 </ b> D provided on the lower surface 151 b of the substrate 151. The monitoring ECU 15 is fixed to the first cover member 12 via the housing case 16 so that the longitudinal direction of the substrate 151 is along the X-axis direction and the short direction of the substrate 151 is along the Y-axis direction. The substrate 151 includes a surface that intersects the Z-axis direction (upper surface 151a and lower surface 151b), a surface that intersects the X-axis direction (left surface 151c and right surface 151d), and a surface that intersects the Y-axis direction (front surface 151e and rear surface). 151f).

  At four corners of the main surface (upper surface 151a and lower surface 151b) of the substrate 151, insertion holes 151g penetrating in the Z-axis direction are provided. The connector receiving portions 152A and 152B are provided at the front end portion of the lower surface 151b so that the receiving port faces the front. The connector receiving portions 152A and 152B protrude forward from the front surface 151e. The connector receiving portions 152C and 152D are provided at the right end portion of the lower surface 151b so that the receiving port faces the right direction. The connector receiving portions 152C and 152D protrude rightward from the right side surface 151d. Of the connector receiving portions 152A to 152D, the connector receiving portion 152A is a portion to which a connector C of a wiring H (for example, a voltage detection harness that is a high voltage line) electrically connected to the battery cell 2 is coupled. The connector C is made of resin. A plurality of pins that are electrically connected to the connector receiving portion 152A are held by the resin.

  The housing case 16 includes a first case member 18 that covers the lower surface 151b (first surface facing the cover) of the substrate 151, and a second case member 19 that covers the upper surface 151a (second surface) of the substrate 151.

  The first case member 18 is connected to a rectangular plate-shaped bottom plate portion 181 facing the lower surface 151b of the substrate 151 and a left end portion of the bottom plate portion 181 and extends to the outside (left direction) of the housing case 16. Extending portion 182. A step is provided between the extending portion 182 and the bottom plate portion 181 so that the upper surface of the extending portion 182 is positioned above the upper surface 181a of the bottom plate portion 181.

  A cylindrical member 183 having screw holes 183a corresponding to insertion holes 151g provided at the two corners of the right edge of the substrate 151 is provided at the two corners of the right edge of the bottom plate 181. Similarly, cylindrical members 184 having screw holes 184a corresponding to the insertion holes 151g provided in the two corners of the left edge of the substrate 151 are provided at the two corners of the left edge of the extending portion 182. It has been. A screw N1 is inserted from above into each insertion hole 151g of the substrate 151, and the screw N1 is screwed into the screw holes 183a and 184a of the columnar members 183 and 184, whereby the monitoring ECU 15 is connected to the first case member. 18 is fixed.

  The height width (the length in the Z-axis direction) of the columnar member 183 substantially matches the height width of the connector receiving portions 152A to 152D. Further, the height width of the columnar member 184 is only the level difference between the bottom plate portion 181 and the extending portion 182b (that is, the distance between the upper surface 181a of the bottom plate portion 181 and the upper surface of the extending portion 182b in the Z-axis direction). The height of the columnar member 183 is smaller. Thereby, the monitoring ECU 15 has the main surface (upper surface 151a and lower surface 151b) of the substrate 151 parallel to the main surface (upper surface 181a and lower surface 181b) of the bottom plate portion 181 and the lower surfaces of the connector receiving portions 152A to 152D are the bottom plate portions. The first case member 18 is supported while being in contact with the upper surface 181 a of the 181.

  A rectangular plate-like extending portion 185 extending in the front-rear direction toward the outside is provided on both side portions in the left-right direction (X-axis direction) of each end that intersects the front-rear direction (Y-axis direction) of the bottom plate portion 181. It has been. A step is provided between the bottom plate portion 181 and the extending portion 185 so that the upper surface of the extending portion 185 is located below the upper surface 181 a of the bottom plate portion 181. Each extending portion 185 is provided with an insertion hole 185a penetrating in the Z-axis direction. The front-rear width of the extending portion 185A provided at the left side portion of the front end portion of the bottom plate portion 181 is larger than the front-rear width of the other extending portions 185.

  A pair of extending portions 186 and 186 (first extending portions) facing in the Y-axis direction are provided at the left end portion of the extending portion 182. Each extending portion 186 is a rectangular plate-like member extending outward (left side) from the left end portion of the extending portion 182. A step is provided between each extending portion 186 and the extending portion 182 such that the upper surface of each extending portion 186 is located above the upper surface of the extending portion 182. Accordingly, each extending portion 186 extends to the outside of the housing case 16 at a height position shifted upward from the bottom plate portion 181. Each extending portion 186 is provided with a screw hole 186a (first insertion hole) penetrating in the Z-axis direction.

  An extending portion 187A is provided at the front end portion of the right edge portion of the bottom plate portion 181. The extending portion 187A is a rectangular plate-like member that extends outward (front side) from the front end portion of the right edge portion of the bottom plate portion 181. A step is provided between the extending portion 187A and the bottom plate portion 181 so that the upper surface of the extending portion 187A is positioned above the upper surface 181a of the bottom plate portion 181. Similarly, an extending portion 187B is provided at the rear end portion of the right edge portion of the bottom plate portion 181. The extending portion 187B is a rectangular plate-like member that extends outward (rear side) from the rear end portion of the right edge of the bottom plate portion 181. A step is provided between the extending portion 187B and the bottom plate portion 181 so that the upper surface of the extending portion 187B is located above the upper surface 181a of the bottom plate portion 181. Each of the extending portions 187A and 187B is provided with a screw hole 187a penetrating in the Z-axis direction.

  Between the two extending portions 185 at the front end portion of the bottom plate portion 181, a rectangular plate-like standing portion 188 is provided. The position, lateral width (length in the X-axis direction), and height of the standing portion 188 are such that when the monitoring ECU 15 and the second case member 19 are attached to the first case member 18, the standing portion 188 is a connector. It is set so that it fits between the receiving portion 152A and the connector receiving portion 152B, and the upper end of the standing portion 188 contacts the notch portion 192a of the second case member 19.

  Between the two extending portions 185 at the rear end portion of the bottom plate portion 181, a rectangular plate-like standing portion 189 is provided so as to stand upward. The position, width, and height of the upright portion 189 are such that the upright portion 189 fits into the notch portion 193a of the second case member 19 when the second case member 19 is attached to the first case member 18. It is set to be full.

  The second case member 19 is a member attached to the first case member 18. The second case member 19 is formed in a substantially box shape. The second case member 19 includes a rectangular plate-shaped top plate portion 191 facing the upper surface 151 a of the substrate 151, and side wall portions 192, 193, 194, 195 erected downward at each end of the top plate portion 191. Have

  The side wall part 192 is a plate-like member erected downward at the front end part of the top plate part 191. The height width of the left side portion of the side wall portion 192 (the portion covering the front end portion of the extending portion 182) is the height of the lower end portion of the side wall portion 192 when the second case member 19 is attached to the first case member 18. The height position is set so that the height position of the lower surface of the extending portion 182 substantially matches. On the other hand, the height width of the right side portion of the side wall portion 192 (the portion covering the front end portion of the bottom plate portion 181) is the same as that of the lower end portion of the side wall portion 192 when the second case member 19 is attached to the first case member 18. The height position and the height position of the lower surface 181b of the bottom plate portion 181 are set so as to substantially match. In order to avoid interference with the connector receiving parts 152A and 152B of the monitoring ECU 15, a part of the lower side part of the side wall part 192 is cut out in the side wall part 192, thereby forming a notch part 192a.

  A part of the lower portion of the side wall 192 is cut out at the right edge of the side wall 192, and an extending portion 196A extending outward (front side) from the upper end position of the notch is provided. The extending part 196 </ b> A is a rectangular plate-like member that extends outward (front side) from the right edge of the side wall part 192. The upper surface of the extending portion 196A is located below the upper surface 191a of the top plate portion 191. The extending portion 196A is provided with an insertion hole 196a penetrating in the Z-axis direction. The extending part 196A is arranged so that the insertion hole 196a of the extending part 196A overlaps with the screw hole 187a of the extending part 187A when viewed from the Z-axis direction.

  The side wall part 193 is a plate-like member erected downward at the rear end part of the top plate part 191. The height width of the left side portion of the side wall portion 193 (the portion covering the rear end portion of the extending portion 182) is the same as that of the lower end portion of the side wall portion 193 when the second case member 19 is attached to the first case member 18. The height position and the height position of the lower surface of the extending portion 182 are set so as to substantially match. On the other hand, the height width of the right side portion of the side wall portion 193 (the portion covering the rear end portion of the bottom plate portion 181) is the lower end of the side wall portion 193 when the second case member 19 is attached to the first case member 18. The height position and the height position of the lower surface 181b of the bottom plate portion 181 are set so as to substantially match. A notch 193a is formed in the side wall 193 by cutting out a part of the lower side portion of the side wall 192 so that the standing part 189 of the first case member 18 is fitted.

  A part of the lower part of the side wall part 193 is cut out at the right edge of the side wall part 193, and an extending part 196B extending outward (rear side) from the upper end position of the notch is provided. . The extending portion 196 </ b> B is a rectangular plate-like member that extends outward (rear side) from the right edge of the side wall portion 193. The upper surface of the extending portion 196B is located below the upper surface 191a of the top plate portion 191. The extending portion 196B is provided with an insertion hole 196a penetrating in the Z-axis direction. The extending part 196B is arranged so that the insertion hole 196a of the extending part 196B overlaps with the screw hole 187a of the extending part 187B when viewed from the Z-axis direction.

  The side wall part 194 is a plate-like member erected downward at the left end part of the top plate part 191. A part of the lower part of the side wall part 194 is notched in the side wall part 194, and a pair of extending parts 197, 197 (second extending part) extending outward (left side) from the upper end position of the notch. ) Are provided so as to face each other in the Y-axis direction. Each extending part 197 is a rectangular plate-like member that extends outward (left side) from the side wall part 194. The upper surface of each extending portion 197 is located below the upper surface 191a of the top plate portion 191. That is, each extending portion 197 extends outside the housing case 16 at a height position shifted downward from the top plate portion 191. Each extending portion 197 is provided with an insertion hole 197a (second insertion hole) penetrating in the Z-axis direction. Each extending portion 197 is disposed so that the insertion hole 197a of each extending portion 197 overlaps with the screw hole 186a of each extending portion 186 when viewed from the Z-axis direction.

  The side wall portion 195 is a plate-like member erected downward at the right end portion of the top plate portion 191. In order to avoid interference with the connector receiving parts 152C and 152D of the monitoring ECU 15, a part of the lower part of the side wall part 195 is cut out in the side wall part 195, thereby forming a notch part 195a.

  A screw N3 is inserted from above into the insertion hole 196a of the extending portions 196A and 196B, and the screw N3 is screwed into the screw hole 187a of the extending portions 187A and 187B. A screw N4 is inserted from above into the insertion hole 197a of each extending portion 197, and the screw N4 is screwed into the screw hole 186a of each extending portion 186. As a result, the second case member 19 is fixed to the first case member 18. Here, in the extending portions 186, 187A, and 187B, instead of the screw holes 186a and 187a, through-holes that are not threaded may be provided. In this case, a nut to which the screws N3 and N4 are screwed may be disposed on the lower surface side of the extending portions 186, 187A and 187B.

  The first cover member 12 includes a bottom plate 121, a pair of side walls 122, 122, and standing portions 123, 124, 125. The bottom plate 121 is a rectangular plate-like member, and is provided so as to cover the upper surface of the battery cell 2 (the upper surface 72a of the lid portion 72). The first cover member 12 is fixed to the intermediate plate 5, for example. The side walls 122 and 122 are erected upward at both ends of the bottom plate 121 in the Y-axis direction and face each other.

  The standing portions 123, 124, and 125 are erected on the upper surface 121 a (outer surface) of the bottom plate 121. The standing portion 123 extends in the Y-axis direction so as to connect the side walls 122 and 122 at a position slightly left of the intermediate position in the X-axis direction of the bottom plate 121. The upright portion 124 extends from the position slightly on the right side of the intermediate position in the X-axis direction of the rear side wall 122 to the position slightly rearward of the intermediate position in the Y-axis direction of the right end of the bottom plate 121 in the Z-axis direction. As viewed from the top, and provided so as to be substantially L-shaped. The standing portion 125 is seen from the Z-axis direction from a position slightly on the right side of the middle position in the X-axis direction of the front side wall 122 to a position slightly on the front side of the middle position in the Y-axis direction of the right end portion of the bottom plate 121. Are provided so as to be substantially L-shaped. The heights of the standing portions 123, 124, and 125 are equal to each other and smaller than the height of the side wall 122.

  Four columnar members 126 each having a screw hole 126a are provided on the upper surface 121a of the bottom plate 121. The four columnar members 126 are arranged so that the insertion holes 185a of the four extending portions 185 of the first case member 18 and the screw holes 126a of the columnar members 126 overlap when viewed from the Z-axis direction. The screw N2 is inserted into the insertion hole 185a of each extending portion 185 of the first case member 18, and the screw N2 is screwed into the screw hole 126a of each columnar member 126, whereby the first case member 18 is 1 It is fixed to the cover member 12.

  On the lower surface 121b (inner surface) of the bottom plate 121, a pair of upright portions 127 and 127 extending in the X-axis direction are provided. The standing portions 127 and 127 protrude downward from the lower surface 121 b and are disposed so as to face each other with the release valve 10 of the battery cell 2 interposed therebetween. The standing portions 127 and 127 are provided from the left end portion to the right end portion of the lower surface 121b. In addition, an overlapping portion 128 is provided at the left end portion of the first cover member 12 so as to overlap the second cover member 13. The overlapping portion 128 is a stepped portion formed by cutting out the inner portions of the bottom plate 121 and the side walls 122 and 122 so that the thickness of the bottom plate 121 and the side walls 122 and 122 is half that of the other portions.

  In a state where the first case member 18 is fixed to the first cover member 12, the lower surface 181 b of the bottom plate portion 181 of the first case member 18 abuts on the upper end portions of the standing portions 123, 124, and 125. An accommodation space S2 is formed between the lower surface 181b of the bottom plate portion 181, the upper surface 121a of the bottom plate 121, and the standing portions 123, 124, and 125. The accommodation space S2 accommodates the wiring H of the connector C coupled to the connector receiving portion 152A (see FIG. 7).

  6A is a perspective view of the second cover member, and FIG. 6B is a perspective view of the third cover member. As shown in FIG. 6A, the second cover member 13 includes a bottom plate 131, a pair of side walls 132, 132, and a pair of standing portions 133, 133 extending in the X-axis direction. The bottom plate 131 and the side walls 132 and 132 have the same configuration as the bottom plate 121 and the side wall 122 of the first cover member 12. At the right end portion (the end portion on the first cover member 12 side) of the second cover member 13, an overlapping portion 134 is provided for overlapping with the overlapping portion 128 of the first cover member 12. The overlapping portion 134 is a stepped portion formed by cutting out the outer portions of the bottom plate 131 and the side walls 132 and 132 so that the thickness of the bottom plate 131 and the side walls 132 and 132 is half that of the other portions. At the left end portion (the end portion on the third cover member 14 side) of the second cover member 13, an overlapping portion 135 is provided for overlapping with the overlapping portion 144 of the third cover member 14. The overlapping portion 135 is a stepped portion formed by cutting out the outer portions of the bottom plate 131 and the side walls 132 and 132 so that the thickness of the bottom plate 131 and the side walls 132 and 132 is half that of the other portions. The standing portions 133 and 133 protrude downward from the lower surface 131a of the bottom plate 131, and are disposed so as to face each other with the release valve 10 of the battery cell 2 interposed therebetween (see FIG. 3). The standing portions 133 and 133 are provided in portions of the lower surface 131a of the bottom plate 131 where the overlapping portions 134 and 135 are not provided.

  As shown in FIG. 6B, the third cover member 14 includes a bottom plate 141, a pair of side walls 142, 142, and a pair of upright portions 143, 143 extending in the X-axis direction. The third cover member 14 is fixed to the end plate 4A, for example. The bottom plate 141 and the side walls 142 and 142 have the same configuration as the bottom plate 121 and the side wall 122 of the first cover member 12. At the right end portion (the end portion on the second cover member 13 side) of the third cover member 14, an overlapping portion 144 is provided for overlapping with the overlapping portion 135 of the second cover member 13. The overlapping portion 144 is a stepped portion formed by cutting out the inner portions of the bottom plate 141 and the side walls 142 and 142 so that the thickness of the bottom plate 141 and the side walls 142 and 142 is half that of the other portions. The standing portions 143 and 143 protrude downward from the lower surface 141a of the bottom plate 141, and are disposed so as to face each other with the release valve 10 of the battery cell 2 interposed therebetween. The standing portions 143 and 143 are formed from the left end portion to the right end portion of the lower surface 141a.

  Next, functions and effects based on the structure of the housing case 16 will be described. 7 is a partial cross-sectional view taken along the line VII-VII in FIG. As shown in FIGS. 3 and 7, the extending part 186 extends to the outside of the housing case 16 at a height position shifted upward from the bottom plate part 181. As a result, the lower end portion (end portion on the bus bar cover 11 side) of the screw N4 (fastening member) that fastens the extending portions 186 and 197 is the lower surface 181b (outer surface) of the bottom plate portion 181 and the lower surface of the extending portion 186. Is located between. That is, the lower end portion of the screw N4 does not protrude toward the bus bar cover 11 than the plane along the lower surface 181b of the bottom plate portion 181.

  For example, when the impact is applied to the storage case 16 and the left side of the storage case 16 (the side on which the extending portions 186 and 197 are provided) is inclined so as to approach the bus bar cover 11 due to the positional relationship, the screw N4 The possibility that the lower end of the battery collides with the bus bar cover 11 can be reduced. In addition, since the possibility that the lower end of the screw N4 collides with the bus bar cover 11 is reduced, the extension portions 186 and 197 are allowed to overlap the second cover member 13 when viewed from the Z-axis direction, and are accommodated. The case 16 can be attached to the first cover member 12. Specifically, as shown in FIG. 7, the extending portions 186 and 197 are connected to the first cover member 12 and the second cover member 13 as viewed from the Z-axis direction (the overlapping portion 128 and the overlapping portion 134 are connected to each other). The housing case 16 is attached to the first cover member 12 so that the longitudinal direction of the housing case 16 is along the X-axis direction (the arrangement direction of the battery cells 2). . Thereby, it is not necessary to avoid the extending portions 186 and 197 from overlapping the connecting portion between the first cover member 12 and the second cover member 13 when viewed from the Z-axis direction, and the longitudinal direction of the housing case 16 is the Y-axis. There is no need to attach the housing case 16 to the first cover member 12 along the direction. As a result, it is not necessary to make the width of the bus bar cover 11 in the Y-axis direction, and consequently the width of the battery module 1 itself, larger than the width of the housing case 16 in the longitudinal direction, and the size of the battery module 1 is suppressed. Therefore, according to the battery module 1, components of the battery module 1 (for example, the bus bar 9, the case 7 of the battery cell 2, etc.) by the screw N4 that fastens the housing case 16 of the monitoring ECU 15 while reducing the size of the battery module 1 are achieved. ) Can be suppressed.

  Further, the extending portion 197 extends outside the housing case 16 at a height position shifted downward from the top plate portion 191. As a result, the upper end portion of the screw N4 is located between the upper surface 191a (outer surface) of the top plate portion 191 and the upper surface of the extending portion 197. That is, the upper end portion of the screw N4 does not protrude outward (upward) from the plane along the upper surface 191a of the top plate portion 191.

  Due to the above positional relationship, for example, an impact is applied to the housing case 16 so that the left side of the housing case 16 (the side on which the extending portions 186 and 197 are provided) tilts away from the bus bar cover 11 (upward). However, it can suppress that the upper end part of screw N4 collides with other members, and the other members concerned are damaged. The “other members” referred to here are, for example, the outer wall of the battery pack that houses the battery module 1 and other battery modules that are housed in the battery pack. Note that the above effect is particularly noticeable in the case where a bolt having an angular head instead of the screw N4 as the fastening member and easily damaging other members by an impact caused by contact is used.

  In the present embodiment, the upper surfaces 121 a of the bottom plate 121 of the first cover member 12 and the lower surface 181 b of the bottom plate portion 181 of the first case member 18 are provided by the standing portions 123, 124, and 125 provided on the first cover member 12. A housing space S2 for housing the wiring H is formed between them. The distance between the lower end of the screw N4 and the bus bar cover 11 is increased by the amount of the accommodation space S2 (that is, the height of the standing portions 123, 124, and 125) (see FIG. 7). As a result, when the impact is applied to the housing case 16 and the left side of the housing case 16 is inclined in a direction approaching the bus bar cover 11, the possibility that the lower end of the screw N4 collides with the bus bar cover 11 can be further reduced.

  Next, the positional relationship between the exhaust gas passage S3 and the connector receiving portion 152A of the monitoring ECU 15 will be described. First, the exhaust gas passage S3 will be described. FIG. 8 is a bottom view of the bus bar cover 11 as viewed from below. In a state where the first cover member 12, the second cover member 13, and the third cover member 14 are arranged so as to cover the upper surface of the battery cell 2 along the X-axis direction, the standing portion 127, the standing portion 133, The standing portion 143 continues along the X-axis direction (see FIG. 8). That is, the release valve 10 is defined by the space extending in the X-axis direction surrounded by the lower surfaces 121b, 131a, 141a, the standing portions 127, 133, 143, and the upper surfaces of the plurality of battery cells 2 (the upper surface 72a of the lid portion 72). An exhaust gas flow path S3 through which the exhaust gas discharged from the gas flows is formed (see FIGS. 3 and 8).

  The exhaust gas passage S3 has a right end portion 20 and a left end portion 21 that are located on opposite sides in the X-axis direction. The exhaust gas flowing through the exhaust gas passage S3 is discharged out of the battery module 1 from the right end portion 20 or the left end portion 21. The right end portion 20 is an open end formed by the lower surface 121b, the standing portion 127, and the upper surface of the battery cell 2 located below the first cover member 12. The left end portion 21 is an open end formed by the lower surface 141 a, the standing portion 143, and the upper surface of the battery cell 2 positioned below the third cover member 14. In the present embodiment, since the monitoring ECU 15 is disposed on the first cover member 12, the connector receiving portion 152A is disposed at a position closer to the right end portion 20 than the left end portion 21 in the X-axis direction.

  For example, when the connector receiving part is arranged so as to face the direction discharged from the exhaust gas flow path at a position directly above the exhaust gas flow path, the high temperature exhaust gas discharged from the exhaust gas flow path is connected to the connector receiving part (and the connector receiving part). The effect on the connector connected to the connector is increased. However, in the present embodiment, as shown in FIG. 7, the connector receiving portion 152A faces the Y-axis direction. That is, the connector receiving portion 152A faces the direction that intersects the direction (X-axis direction) in which the exhaust gas is discharged from the exhaust gas passage S3. Thereby, the thermal influence which the high temperature exhaust gas discharged | emitted from waste gas flow path S3 exerts on the connector C connected with the connector receiving part 152A is reduced. Further, as shown in FIG. 8, the connector receiving portion 152A is provided so as not to overlap the exhaust gas flow path S3 when viewed from the Z-axis direction. Thereby, the heat influence which the exhaust gas which distribute | circulates exhaust gas flow path S3 exerts on the connector C connected with the connector receiving part 152A is also reduced. As described above, according to the battery module 1, the thermal influence on the connector C connected to the monitoring ECU 15 can be reduced. As a result, even if the connector C is made of a material that is weak against heat (for example, resin), it is possible to prevent the connector C from being melted. For example, it is possible to suppress the occurrence of a situation in which the resin forming the connector C melts down at a high temperature and the pins held by the resin come into contact with each other to cause a short circuit.

  In the present embodiment, the bus bar cover 11 includes a plurality of cover members (first cover member 12, second cover member 13, and third cover member 14) arranged along the X-axis direction. As described above, when the bus bar cover 11 is composed of a plurality of cover members, a gap is generated in the connection portion between the cover members due to the thermal expansion of the battery cell 2, and the exhaust gas in the exhaust gas flow path S3 may flow out from the gap. On the other hand, in the present embodiment, when viewed from the Z-axis direction, the connector C coupled to the connector receiving portion 152A does not overlap with the connection portion between the plurality of cover members. Specifically, the connector receiving portion 152A does not overlap the connecting portion (the region where the overlapping portion 128 and the overlapping portion 134 overlap) between the first cover member 12 and the second cover member 13 when viewed from the Z-axis direction. Is arranged. Thereby, even if the exhaust gas flows out from the gap generated at the connection portion between the first cover member 12 and the second cover member 13, it is possible to prevent the exhaust gas from directly blowing on the connector C. As a result, even when thermal expansion of the battery cell 2 occurs, the thermal influence on the connector C can be effectively reduced.

  In the present embodiment, an accommodation space S <b> 2 for accommodating the wiring H is formed by the standing portions 123, 124, and 125 provided in the first cover member 12. Thus, according to the battery module 1, the housing space S <b> 2 for housing the wiring H is formed by the standing portions 123, 124, 125 provided in the first cover member 12, and the housing space S <b> 2 The distance between the monitoring ECU 15 (that is, the connector receiving portion 152A) and the exhaust gas passage S3 can be increased. Specifically, the distance between the monitoring ECU 15 and the exhaust gas flow path S3 can be increased by at least the height of the standing portions 123, 124, and 125 as compared with the case where such a housing space S2 is not formed. it can. As a result, the thermal influence on the connector C due to the exhaust gas flowing through the exhaust gas flow path S3 can be further reduced.

  In addition, this invention is not limited to embodiment mentioned above.

  For example, as shown in FIG. 9, among the right end 20 and the left end 21 of the exhaust gas flow path S3, the right end 20 closer to the connector receiving portion 152A may be blocked so that the exhaust gas does not flow out. On the other hand, the left end portion 21 far from the connector receiving portion 152A may be opened so that the exhaust gas can flow out. In the example shown in FIG. 9, the standing portion 129 that is a plate-like member that protrudes downward so as to connect the right ends of the pair of standing portions 127 and 127 of the first cover member 12 and extends in the Y-axis direction. Is provided. The height width of the standing portion 129 is made equal to the height width of the standing portion 127. Thereby, the right end portion 20 of the exhaust gas passage S3 is blocked by the standing portion 129. The standing portion 129 may be a separate member from the standing portions 127 and 127, or may be formed as a part of a substantially U-shaped member integrally formed with the standing portions 127 and 127. Good.

  According to the above configuration, outflow of exhaust gas from the right end portion 20 closer to the connector receiving portion 152A among the both end portions (the right end portion 20 and the left end portion 21) of the exhaust gas passage S3 extending in the X-axis direction is prevented. Can do. Thereby, the thermal influence which the exhaust gas which flowed out from exhaust gas flow path S3 has on the connector C can be reduced further.

  FIG. 10 shows a configuration in which the first cover member 12 </ b> A according to a modification is employed instead of the first cover member 12. The first cover member 12 </ b> A is different from the first cover member 12 in that it has standing portions 201 and 202 instead of the standing portions 127 and 127. The standing portion 201 is connected to the right end portion of the front standing portion 133 and extends in a direction approaching the standing portion 202, and an end portion of the standing portion 201a that faces the standing portion 202 And a standing portion 201b extending in the X-axis direction. The standing portion 202 is connected to the right end portion of the rear standing portion 133 and faces the standing portion 202a extending in a direction approaching the standing portion 201 and the standing portion 201 in the standing portion 202a. And an upright portion 202b extending in the X-axis direction.

  Due to the standing parts 201 and 202 configured as described above, the separation width between the standing parts 201a and 201b and the standing parts 202a and 202b is the same as the separation width between the pair of standing parts 133 and 133 and the pair of standing parts. It is smaller than the separation width of the portion 143. That is, in the exhaust gas flow channel S3, the flow channel width of the portion formed on the lower surface 121b side of the first cover member 12A is the other portion (that is, the lower surface 131a side of the second cover member 13 and the third cover member 14). Smaller than the portion formed on the lower surface 141a side. Thus, by reducing the flow path width of the portion formed on the lower surface 121b side of the first cover member 12 where the monitoring ECU 15 is disposed in the exhaust gas flow path S3, the connector receiving portion 152A and the exhaust gas flow path S3. And the distance in the Y-axis direction can be increased. Thereby, the thermal influence which the exhaust gas which distribute | circulates exhaust gas flow path S3 exerts on the connector C connected with the connector receiving part 152A can be reduced further.

  FIG. 11A shows a configuration in which a first cover member 12B according to a modification is employed instead of the first cover member 12. FIG. The first cover member 12 </ b> B is different from the first cover member 12 </ b> A in that the first cover member 12 </ b> B has a standing portion 127 similar to that of the above embodiment instead of the standing portion 202. Also with the first cover member 12B, the distance in the Y-axis direction between the connector receiving portion 152A and the exhaust gas passage S3 can be increased.

  Further, in the example shown in FIG. 11A, the shape of the exhaust gas flow path S3 is formed by a pair of standing portions (in this example, standing portions 201 and 127) provided on the lower surface 121b of the first cover member 12. The connector receiving portion 152C is defined so as not to overlap with the Z-axis direction. Specifically, the position of the housing case 16 attached to the first cover member 12 is narrower than the above embodiment by narrowing the flow path width by narrowing the side close to the connector receiving portion 152A in the exhaust gas flow path S3. It is shifted backward. That is, by defining the shape of the exhaust gas flow path S3 (flow path width and the like) by the pair of standing portions 201 and 127, the arrangement of the monitoring ECU 15 (that is, the position where the housing case 16 is attached to the first cover member 12) is free. The degree can be improved.

  FIG. 11B shows a configuration in which a first cover member 12 </ b> C according to a modification is employed instead of the first cover member 12. The first cover member 12 </ b> C is different from the first cover member 12 in that it has standing portions 301 and 302 instead of the standing portions 127 and 127. The standing portion 301 has a standing portion 301a and a standing portion 301b. The standing portion 302 has a standing portion 302a and a standing portion 302b. The standing portion 301a is connected to the right end portion of the front-side standing portion 133, and the X-axis is set such that the distance in the Y-axis direction from the standing portion 302b of the standing portion 302 decreases toward the right. It extends in a direction inclined with respect to the direction. The standing portion 301b is connected to the standing portion 301a and extends in the X-axis direction. Further, the standing portion 302a is connected to the right end portion of the rear standing portion 133 so that the distance in the Y-axis direction from the standing portion 301b of the standing portion 301 becomes smaller toward the right. , Extending in a direction inclined with respect to the X-axis direction. The standing portion 302b is connected to the standing portion 302a and extends in the X-axis direction.

  Due to the standing parts 301 and 302 configured as described above, the portion of the exhaust gas flow path S3 sandwiched between the standing part 301a and the standing part 302a is gradually tapered toward the right. Tapered. Thereby, the flow path width of the part sandwiched between the standing part 301b and the standing part 302b in the exhaust gas flow path S3 is narrower than the flow path width of the other part. As described above, the configuration in which the flow path width is gradually narrowed further reduces the thermal effect of the exhaust gas flowing through the exhaust gas flow path S3 on the connector C connected to the connector receiving portion 152A, and the exhaust gas flow path. The distribution of the exhaust gas in S3 can be made smooth.

  Further, the bus bar cover 11 may be composed of two or four or more cover members.

  Further, in the housing case 16, the screw N3 has a configuration in which the lower end portion does not protrude from the lower surface 181b of the bottom plate portion 181 as in the case of the screw N4, but the connection between the first cover member 12 and the second cover member 13 is performed. The lower end of the screw N3 that is not located in the portion may protrude from the lower surface 181b of the bottom plate 181.

  The position where the first case member 18 and the first cover member 12 are fastened by the fastening member and the position where the first case member 18 and the second case member 19 are fastened by the fastening member are appropriately changed. Also good.

  DESCRIPTION OF SYMBOLS 1 ... Battery module, 2 ... Battery cell, 7 ... Case, 10 ... Release valve, 11 ... Bus-bar cover, 12 ... 1st cover member, 13 ... 2nd cover member, 15 ... Monitoring ECU, 16 ... Housing case, 18 ... 1st case member, 19 ... 2nd case member, 123, 124, 125 ... Standing part, 127, 133, 143, 201, 202, 301, 302 ... Standing part, 152A ... Connector receiving part, 181 ... Bottom plate part 186 ... Extension part (first extension part), 186a ... Insertion hole (first insertion hole), 191 ... Top plate part, 197 ... Extension part (second extension part), 197a ... Screw hole (first 2 through hole), C ... connector, H ... wiring, N4 ... screw (fastening member), S2 ... accommodation space, S3 ... exhaust gas flow path.

Claims (3)

A plurality of battery cells;
A cover covering one surface of the plurality of battery cells;
A control device that is disposed on the opposite side of the plurality of battery cells across the cover, and that monitors the state of the battery cells;
A housing case for housing the control device;
With
The cover has a first cover member and a second cover member arranged along the arrangement direction of the plurality of battery cells,
The storage case is attached to the first cover member such that a longitudinal direction of the storage case is along the arrangement direction, and a first case member that covers a first surface facing the cover of the control device; A second case member connected to the first case member and covering a second surface opposite to the first surface of the control device;
The first case member is disposed outside the housing case at a position shifted in a direction from the first surface toward the second surface with respect to the bottom plate portion facing the first surface of the control device and the bottom plate portion. A first extending portion extending,
The second case member includes a top plate portion that faces the second surface of the control device, a second extension portion that extends to the outside of the housing case so as to face the first extension portion, Have
The first extending portion and the second extending portion include a fastening member in a first insertion hole provided in the first extension portion and a second insertion hole provided in the second extension portion. It is concluded by being inserted,
The first extension part and the second extension part are arranged at a position overlapping the second cover member as seen from the direction in which the cover and the battery cell face each other.
An end portion on the cover side of the fastening member is located between an outer surface of the bottom plate portion and the first extending portion,
Battery module. The second extending portion extends outside the housing case at a position shifted in a direction from the second surface toward the first surface than the top plate portion,
The end of the fastening member opposite to the end on the cover side is located between the outer surface of the top plate and the second extending portion.
The battery module according to claim 1. The first cover has a standing portion that stands on an outer surface of the first cover member facing the first case member,
A space is formed between the outer surface of the first cover member and the bottom plate portion of the first case member by the standing portion.
The battery module according to claim 1 or 2.

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