JP2020038762A - Secondary battery module - Google Patents

Abstract

To provide a battery module capable of extracting individual secondary batteries more easily than the prior arts while preventing a structure which holds multiple secondary batteries or the secondary batteries from being damaged.SOLUTION: A housing 80 comprises: a pair of support parts 30 supporting multiple secondary batteries 10 from both sides in a width direction (Z axis direction); a coupling part 40 extending in the width direction (Z axis direction) and coupling the pair of support parts 30; and multiple slots 50 which are defined between the pair of support parts 30 and capable of sliding the individual secondary batteries 10 in a height direction (Y axis direction) and accommodating them. A spacer 20 includes a channel forming part 23 extending from an open end 51 of the slot 50 in the height direction (Y axis direction) and defining a coolant channel 60 which faces the secondary battery 10.SELECTED DRAWING: Figure 8

Description

  The present disclosure relates to a secondary battery module.

  2. Description of the Related Art Conventionally, an invention related to an assembled battery in which a plurality of unit cells are combined, an invention related to an assembled battery in which a plurality of square batteries are arranged at fixed positions by a battery holder, and an invention related to a connection structure of battery cells are known (see the following). See Patent Documents 1-3.).

  The battery pack described in Patent Document 1 has a plurality of cells, a case in which the plurality of cells are housed side by side, and a surface provided for each of the cells and provided with terminals of the cells. And an insulating member disposed at According to this assembled battery, the insulating member is disposed on the surface where the terminals of each unit cell are located, and the insulating member is provided on each unit cell. Therefore, even if the number of cells used in the assembled battery is changed, In addition, it is possible to cope only by adjusting the number of lid members in accordance with the number of cells, and it is not necessary to newly manufacture a dedicated insulating member (see the same document, claim 1, paragraph 0015, etc.). .

  The battery pack described in Patent Literature 2 includes a battery holder in which a plurality of prismatic batteries are arranged at intervals, and the plurality of prismatic batteries are held in a fixed position at predetermined intervals in a parallel posture. The battery holder includes a plurality of holding frames stacked in a vertical direction. Each holding frame has a plurality of holding holes into which a plurality of prismatic batteries are inserted. In this conventional battery pack, rectangular batteries are inserted into holding holes of a plurality of stacked holding frames constituting a battery holder, and the plurality of square batteries are arranged at fixed positions by the battery holder. In this battery pack, a plurality of holding frames are stacked to form a battery holder, so that each molded frame can be mass-produced at a lower cost as compared with a battery pack using the battery holder as one member. And paragraph 0016, etc.).

  Further, in this conventional battery pack, the holding frame of the battery holder has a partition wall, the partition wall extends in the vertical direction, is located between adjacent rectangular batteries, and is located between the partition wall and the rectangular battery. A cooling gap through which a cooling gas flows is provided. The prismatic batteries are connected in series or in parallel with each other by connecting adjacent electrode terminals by bus bars made of a metal plate. These prismatic batteries have columnar electrode terminals (see the same document, claims 5, 6, paragraph 0023, FIG. 1, etc.).

  The connection structure of battery cells described in Patent Document 3 is a method of connecting a plurality of battery cells in which a pair of electrode terminals are formed near both ends of an upper surface to two adjacent electrode terminals between two adjacent battery cells. Are connected in series so as to have different polarities from each other. This conventional connection structure for battery cells includes a plurality of bus bars, a plurality of voltage detection lines, a plurality of separators, and a pressing member (see the same document, claim 1 and the like).

  The plurality of bus bars electrically connect two adjacent electrode terminals having different polarities. The plurality of voltage detection lines are electrically connected to each of the plurality of bus bars. The plurality of separators have a partition wall that is arranged between two adjacent battery cells and separates each battery cell. The pressing member presses terminal portions of the plurality of bus bars and the plurality of voltage detection lines against the electrode terminals.

  The pressing member includes two wedge-shaped portions having latches, and a connecting portion connecting the two wedge-shaped portions. The partition wall has a protruding portion that protrudes above the upper surface of the battery cell by a predetermined height near a position near one or other end of the upper surface of the battery cell. The plurality of separators further include a roof that covers the electrode terminals of two adjacent battery cells from above the protrusion, and the positions of the protrusion and the roof of the two separators that sandwich each battery cell are alternated. Are located in

  The roof has a tapered portion and a latching portion on a surface facing the upper surface of the battery cell. When the pressing member is inserted into a region defined by the protrusions of the two separators sandwiching the two adjacent battery cells, the tapered portion presses the wedge-shaped portion against the bus bar and the terminal portion of the voltage detection line from above, The latch locking portion locks the latch. With this configuration, the conventional battery cell connection structure described in Patent Literature 3 is a connection structure that connects a plurality of battery cells without performing bolt fastening, without performing special processing on the electrode terminals of the battery cells. , Bus bars and voltage detection lines can be easily attached.

JP 2013-84595 A JP-A-2006-103378 JP-A-2017-130338

  In the conventional battery pack described in Patent Literature 1, a positive terminal and a negative terminal of an adjacent unit cell are electrically connected by a bus bar made of a conductive plate-shaped material (paragraph 0040 of the same document). And FIG. 3 etc.). Such a bus bar is usually welded to a positive electrode terminal and a negative electrode terminal of a unit cell. Therefore, when it becomes necessary to replace one of the plurality of cells constituting the assembled battery, the entire assembled battery may need to be replaced.

  Further, in the battery pack described in Patent Literature 2, the corners of the edges of the holding holes of the holding frame constituting the battery holder and the corners of the edges of the cooling gap intersect with the insertion / removal direction of the square battery with respect to the battery holder. Extend in the direction of Therefore, when the prismatic battery is inserted into or removed from the battery holder, the above-described corners of the holding frame may be caught by the prismatic battery, and the holding frame and the prismatic battery may be damaged.

  The battery cell connection structure described in Patent Literature 3 can connect a plurality of battery cells without performing bolt fastening. However, when it is necessary to replace one of the battery cells, it is necessary to break the latch of the pressing member and release the latch with the latch engagement portion of the separator, which complicates the operation.

  The present disclosure provides a battery module that can easily take out individual secondary batteries as compared to the related art while preventing damage to a structure holding a plurality of secondary batteries and the secondary batteries.

  One embodiment of the present disclosure provides a plurality of flat rectangular secondary batteries, a housing that stacks and holds the plurality of secondary batteries in the thickness direction, and a space between the secondary batteries adjacent to the thickness direction. And a spacer disposed in the housing, wherein the housing includes a pair of support portions that support the plurality of secondary batteries from both sides in the width direction, and the housing extends in the width direction. A connecting portion for connecting the pair of support portions, and a plurality of slots defined between the pair of support portions and capable of accommodating each of the secondary batteries by sliding in a height direction, wherein the spacer is And a flow path forming portion extending in the height direction from the open end of the slot and defining a refrigerant flow path facing the secondary battery.

  According to the above aspect of the present disclosure, the case and the spacer, which are structures holding a plurality of secondary batteries, and the individual secondary batteries can be more easily taken out than before while preventing damage to the secondary batteries. The battery module capable of performing the above can be provided.

FIG. 2 is a perspective view of the secondary battery module according to the first embodiment. FIG. 2 is a perspective view of a secondary battery and a spacer constituting the secondary battery module shown in FIG. 1. FIG. 3 is an exploded perspective view of the secondary battery and the spacer illustrated in FIG. 2. FIG. 2 is an exemplary perspective view of a housing constituting the secondary battery module shown in FIG. 1; FIG. 5 is an exploded perspective view of the housing shown in FIG. 4. The side view of the secondary battery module shown in FIG. FIG. 7 is a schematic sectional view of the secondary battery module taken along line VII-VII shown in FIG. 6. FIG. 2 is a perspective view of the secondary battery module shown in FIG. 1 with one secondary battery removed. FIG. 7 is a side view corresponding to FIG. 6 of the secondary battery module according to the second embodiment. FIG. 10 is an exploded perspective view of the secondary battery and the spacer of the secondary battery module shown in FIG. 9. FIG. 10 is a perspective view corresponding to FIG. 8 of the secondary battery module shown in FIG. 9. FIG. 7 is a side view corresponding to FIG. 6 of the secondary battery module according to Embodiment 3. FIG. 13 is a perspective view of a secondary battery and a spacer that constitute the secondary battery module shown in FIG. 12. FIG. 14 is a schematic cross-sectional view of the secondary battery module shown in FIG. 12 along the line XIV-XIV. FIG. 10 is an exploded perspective view of the secondary battery module according to Embodiment 4. FIG. 16 is a perspective view of a secondary battery and a spacer that constitute the secondary battery module shown in FIG. 15. FIG. 15 is an exploded perspective view of the secondary battery module according to Embodiment 5. FIG. 18 is a perspective view of a housing of the secondary battery module shown in FIG. 17.

  Hereinafter, an embodiment of a secondary battery module according to the present disclosure will be described with reference to the drawings.

[Embodiment 1]
FIG. 1 is a perspective view of the secondary battery module 100 according to the first embodiment. FIG. 2 is a perspective view of the secondary battery 10 and the spacer 20 constituting the secondary battery module 100 shown in FIG. FIG. 3 is an exploded perspective view of the secondary battery 10 and the spacer 20 shown in FIG. FIG. 4 is a perspective view of a housing 80 constituting the secondary battery module 100 shown in FIG. FIG. 5 is an exploded perspective view of the housing 80 shown in FIG. FIG. 6 is a side view of the secondary battery module 100 shown in FIG. FIG. 7 is a schematic sectional view of the secondary battery module 100 along the line VII-VII shown in FIG.

  In the following, an XYZ orthogonal configuration including an X axis parallel to the thickness direction of the secondary battery 10, a Y axis parallel to the height direction of the secondary battery 10, and a Z axis parallel to the width direction of the secondary battery 10 will be described. The configuration of the secondary battery module 100 may be described using a coordinate system. Further, directions such as up, down, left, right, and vertical and horizontal in the following description are directions for convenience of describing the configuration of the secondary battery module 100, and do not limit the directions when the secondary battery module 100 is used. .

  The secondary battery module 100 of the present embodiment is mounted on a vehicle such as an electric vehicle (EV), a hybrid vehicle (HV), and a plug-in hybrid vehicle (PHV), and forms a vehicle-mounted power supply device in a motor drive system. In addition, the secondary battery module 100 of the present embodiment is applied to, for example, a stationary power storage device. Although the details will be described later, the secondary battery module 100 of the present embodiment has, for example, the following configuration.

  The secondary battery module 100 includes a plurality of flat rectangular secondary batteries 10, a housing 80 that stacks and holds the plurality of secondary batteries 10 in the thickness direction (X-axis direction), and is adjacent in the thickness direction. And a spacer 20 disposed between the secondary batteries 10. The housing 80 includes a pair of support portions 30 that support the plurality of secondary batteries 10 from both sides in the width direction (Z-axis direction), a connecting portion 40 that extends in the width direction and connects the pair of support portions 30, And a plurality of slots 50 which are defined between the support portions 30 and are capable of accommodating each secondary battery 10 by being slid in the height direction (Y-axis direction). The spacer 20 has a flow path forming part 23 extending in the height direction (Y-axis direction) from the open end 51 of the slot 50 and defining a refrigerant flow path 60 facing the secondary battery 10.

  Hereinafter, the configuration of each part of the secondary battery module 100 of the present embodiment will be described in detail. The secondary battery 10 is, for example, a lithium ion secondary battery, and more specifically, a rectangular lithium ion secondary battery having a flat and thin rectangular parallelepiped shape. The secondary battery 10 has a pair of wide sides 10a on both sides in the thickness direction (X-axis direction), a pair of narrow sides 10c on both sides in the height direction (Y-axis direction), and a pair of narrow sides 10c in the width direction (Z-axis direction). It has a pair of narrow sides 10b on both sides. Among these faces of the secondary battery 10, the area of the wide side face 10a facing the thickness direction is the largest, and the area of the narrow side face 10b facing the width direction is the smallest.

  The secondary battery 10 has a bottomed rectangular cylindrical battery can 11 having one end opened in the height direction (Y direction), a rectangular plate-shaped battery lid 12 that seals an opening of the battery can 11, and a pair of And the external terminal 13. Although not shown, the secondary battery 10 has an electrode group, a current collector, an insulating member, an insulating cover, an electrolyte, and the like inside a battery container constituted by a battery can 11 and a battery lid 12. ing.

  The battery can 11 and the battery lid 12 are made of, for example, aluminum or an aluminum alloy, and the entire periphery of the battery lid 12 is joined to the opening of the battery can 11 by laser welding to form a sealed battery container. I have. The battery lid 12 has a gas discharge valve 12a (see FIG. 7) at the center in the longitudinal direction, and has through holes at both ends in the longitudinal direction. The gas discharge valve 12a is opened when the pressure inside the battery container formed by the battery can 11 and the battery lid 12 rises above a predetermined pressure, and discharges the gas inside the battery container. The safety of the secondary battery 10 is ensured.

  Each of the pair of external terminals 13 has a substantially rectangular parallelepiped block shape, and one is a positive external terminal 13 and the other is a negative external terminal 13. Each of the pair of external terminals 13 is connected to a narrow side surface 10 c on one side in the height direction of the secondary battery 10, that is, both ends in the longitudinal direction of the outer surface of the battery lid 12 via a resin gasket having electrical insulation. And is electrically insulated from the battery lid 12.

  The external terminal 13 of the positive electrode is made of, for example, aluminum or an aluminum alloy, and has a through hole at one end in the longitudinal direction of the battery lid 12 and a columnar connection portion inserted into a gasket. The external terminal 13 of the negative electrode is made of, for example, copper or a copper alloy, and has a through hole at the other end in the longitudinal direction of the battery lid 12 and a columnar connection portion inserted into the gasket. The terminal portion of the external terminal 13 of the positive electrode is connected to a current collector plate of the positive electrode housed inside the battery can 11, and the terminal portion of the external terminal 13 of the negative electrode is connected to the collector of the negative electrode housed inside the battery can 11. Connected to the board.

  The positive electrode current collecting plate housed inside the battery can 11 is electrically connected to a positive electrode constituting a group of electrodes housed inside the battery can 11. The negative electrode current collecting plate housed inside the battery can 11 is electrically connected to a negative electrode constituting a group of electrodes housed inside the battery can 11. The current collector plates of the positive electrode and the negative electrode are fixed to the battery cover 12 with, for example, an insulating member made of resin having electrical insulation, and are electrically insulated from the battery cover 12.

  The electrode group is, for example, a flat wound electrode group formed by interposing a separator having electrical insulation between a positive electrode and a negative electrode, and winding and forming these. The electrode group has a positive electrode current collector plate and a negative electrode current collector plate joined to a positive electrode foil exposed portion and a negative electrode electrode foil exposed portion, respectively, which are wound and bound at one end and the other end in the winding axis direction. .

  Thereby, the positive electrode constituting the electrode group is electrically connected to the external terminal 13 of the positive electrode via the current collector plate of the positive electrode, and the negative electrode constituting the electrode group is electrically connected to the outside of the negative electrode via the current collector plate of the negative electrode. It is electrically connected to the terminal 13. The electrode group is supported by the battery lid 12 via the positive and negative electrode current collector plates, is covered by the insulating cover, is housed inside the battery can 11, and is provided with the non-aqueous electrolyte housed inside the battery can 11. It is immersed in liquid.

  With such a configuration, when power is supplied to the secondary battery 10 through the pair of external terminals 13, electric energy is stored in the electrode group inside the battery container formed by the battery can 11 and the battery lid 12. Is charged. In addition, when the secondary battery 10 is in a charged state, it can supply power to the outside via the pair of external terminals 13.

  In the secondary battery module 100 of the present embodiment, the plurality of secondary batteries 10 are connected in series, for example. More specifically, in the secondary battery module 100, the plurality of secondary batteries 10 are arranged so as to be stacked in the thickness direction (X-axis direction) of the secondary battery 10. The plurality of secondary batteries 10 are arranged such that, in two adjacent secondary batteries 10, the external terminal 13 of the positive electrode of one secondary battery 10 and the external terminal 13 of the negative electrode of the other secondary battery 10 are adjacent to each other. , Are alternately inverted by 180 °. Then, the external terminals 13 of the positive electrode of one of the secondary batteries 10 adjacent in the stacking direction and the negative electrode 13 of the other secondary battery 10 are sequentially connected by the bus bar 90 in the stacking direction, thereby forming a plurality of secondary batteries. The secondary batteries 10 are connected in series.

  The spacer 20 is made of, for example, an insulating resin material such as engineering plastic. The spacer 20 has, for example, a plurality of flow path forming portions 23 that expose a part of the wide side surface 10a of the secondary battery 10. The flow path forming portion 23 is, for example, a slit-shaped through-hole provided in the spacer 20, and extends from one narrow side surface 10 c in the height direction of the secondary battery 10 disposed at the open end 51 of the slot 50 to the other. It extends continuously in the height direction (Y-axis direction) of the secondary battery 10 to the narrow side surface 10c.

  The spacer 20 is attached to each of the secondary batteries 10 inserted into each of the plurality of slots 50 defined between the pair of support portions 30 of the housing 80. The spacer 20 is arranged in a space between two adjacent secondary batteries 10 inserted into adjacent slots 50 of the housing 80. In addition, the secondary battery module 100 of the present embodiment includes two adjacent secondary batteries 10 in which the flow path forming portions 23 of the two spacers 20 disposed between two adjacent secondary batteries 10 face each other. A coolant channel 60 is defined between the two.

  The coolant channel 60 is defined by the wide side surface 10a of the secondary battery 10 and the channel forming portion 23 of the spacer 20, and has an inlet and an outlet at one end and the other end of the spacer 20 in the height direction of the secondary battery 10. are doing. Thereby, the coolant such as cooling air is introduced from the inlet into the coolant channel 60 and flows in the height direction of the secondary battery 10 along the wide side surface 10a of the secondary battery 10, thereby cooling the secondary battery 10. Thus, the refrigerant whose temperature has risen is discharged from the outlet.

  The spacer 20 is, for example, a cell holder that holds the secondary battery 10 in the thickness direction (X-axis direction), and includes narrow sides 10c on both sides in the height direction (Y-axis direction) of the secondary battery 10 and the thickness direction. Are mounted so as to oppose the wide side surfaces 10a on both sides of the front side. The spacer 20 is attached to a middle portion in the width direction of the secondary battery 10 except for both ends in the width direction (Z-axis direction).

  The spacer 20 has, for example, a first spacer 20A, a second spacer 20B, and a gasket 24. Each of the first spacer 20A and the second spacer 20B has a first portion 21 along the wide side surface 10a of the secondary battery 10 and a second portion 22 along the narrow side surface 10c of the secondary battery 10, and has a thickness of The secondary battery 10 is held from both sides in the direction (X-axis direction). That is, the spacer 20 holds the secondary battery 10 from both sides in the thickness direction by the first spacer 20A and the second spacer 20B.

  The first portion 21 of the first spacer 20 </ b> A faces one wide side surface 10 a of the secondary battery 10 and extends in the height direction (Y-axis direction) and the width direction (Z-axis direction) of the secondary battery 10. It is a plate-shaped portion and has a plurality of flow path forming portions 23. The pair of second portions 22 of the first spacer 20A oppose the narrow side surfaces 10c on both sides in the height direction (Y-axis direction) of the secondary battery 10, and in the width direction (Z-axis direction) and the thickness of the secondary battery 10. This is a flat plate-shaped portion extending in the vertical direction (X-axis direction).

  The pair of second portions 22 of the first spacer 20 </ b> A are formed along the pair of narrow side surfaces 10 c of the secondary battery 10 from both ends of the first portion 21 in the height direction (Y-axis direction) of the secondary battery 10. The battery 10 extends to near the center in the thickness direction (X direction) of the battery 10. The pair of second portions 22 of the first spacer 20 </ b> A have notches 22 a at positions corresponding to the gas discharge valves 12 a of the secondary battery 10. Note that the first spacer 20A may have the notch 22a only in the second portion 22 of the pair of second portions 22 facing the battery lid 12.

  The first portion 21 of the second spacer 20B faces the other wide side surface 10a of the secondary battery 10 and extends in the height direction (Y-axis direction) and the width direction (Z-axis direction) of the secondary battery 10. It is a plate-shaped portion and has a plurality of flow path forming portions 23. The pair of second portions 22 of the second spacer 20B oppose the narrow sides 10c on both sides in the height direction (Y-axis direction) of the secondary battery 10, and the width direction (Z-axis direction) and thickness of the secondary battery 10 This is a flat plate-shaped portion extending in the vertical direction (X-axis direction).

  The pair of second portions 22 of the second spacer 20 </ b> B extend from both ends of the first portion 21 in the height direction (Y-axis direction) of the secondary battery 10 along the pair of narrow side surfaces 10 c of the secondary battery 10. The battery 10 extends to near the center in the thickness direction (X direction) of the battery 10. The pair of second portions 22 of the second spacer 20 </ b> B have notches 22 a at positions corresponding to the gas discharge valves 12 a of the secondary battery 10. The second spacer 20 </ b> B may have the notch 22 a only in the second portion 22 of the pair of second portions 22 facing the battery lid 12.

  The gasket 24 is a rectangular frame-shaped member that faces the battery lid 12 and surrounds the gas discharge valve 12a, and defines a flow path for gas discharged from the gas discharge valve 12a. That is, the gasket 24 isolates the flow path of the gas discharged from the gas discharge valve 12a from the refrigerant flow path 60, so that the gas discharged from the gas discharge valve 12a does not mix with the refrigerant flowing through the refrigerant flow path 60. ing. The gasket 24 has, for example, a groove 24 a on the outer peripheral surface of the end on the battery lid 12 side in the height direction (Y-axis direction) of the secondary battery 10. The groove 24a is provided continuously over the entire outer peripheral surface of the gasket 24, for example.

  The gasket 24 is formed on the first spacer 20A and the second spacer 20B by, for example, engaging the stepped edge of the notch 22a of the second portion 22 of the first spacer 20A and the second spacer 20B with the groove 24a. It is fixed and arranged so as to be in contact with the battery lid 12 and surround the gas discharge valve 12a. The spacer 20 has, for example, a convex portion and a concave portion that engage with each other at an end of the second portion 22 of the first spacer 20A and the second spacer 20B that face each other. By doing so, it may be attached to the secondary battery 10.

  Each of the first spacer 20A and the second spacer 20B has a plurality of flow path forming portions 23. The flow path forming portions 23 of the first spacer 20A and the second spacer 20B are constituted by slit-shaped through holes provided in the first portion 21 and concave notches provided in the pair of second portions 22. ing. The flow path forming portions 23 of the first spacer 20 </ b> A and the second spacer 20 </ b> B are respectively provided on both sides of the gasket 24 surrounding the gas discharge valve 12 a in the width direction (Z-axis direction) of the secondary battery 10. There are a total of four. The number of the flow path forming portions 23 is an example, and is not particularly limited.

  The slit-shaped through holes provided in the first portion 21 of the first spacer 20A and the second spacer 20B and forming the flow path forming portion 23 are connected between two adjacent secondary batteries 10 and are adjacent to each other. Together with the wide side surfaces 10 a of the two secondary batteries 10, a refrigerant passage 60 is defined. The concave cutouts provided in the pair of second portions 22 of the first spacer 20A and the second spacer 20B and constituting the flow path forming portion 23 are opposed to each other between two adjacent secondary batteries 10 and the refrigerant An inlet and an outlet of the flow channel 60 are defined.

  As described above, the housing 80 has the pair of support portions 30, the connecting portion 40, and the plurality of slots 50, and has, for example, a rectangular flat cover 70.

  The pair of support portions 30 are rectangular plate-shaped members arranged on both sides of the plurality of secondary batteries 10 in the width direction (Z-axis direction), and support the plurality of secondary batteries 10 from both sides in the width direction. I have. Further, the pair of support portions 30 has, for example, a plurality of flat guide portions 31. The guide portions 31 are provided on the pair of support portions 30 and extend inward in the width direction of the secondary battery 10 and extend in the height direction (Y-axis direction) of the secondary battery 10 to extend the width of the secondary battery 10. Both ends in the direction (Z-axis direction) are slidably supported in the height direction.

  The connecting portion 40 is, for example, a rectangular plate-shaped portion disposed on one side of the height direction (Y-axis direction) of the plurality of secondary batteries 10, and extends in the width direction (Z-axis direction) of the secondary batteries 10. It extends and connects a pair of support parts 30. That is, the connection portion 40 is connected to the ends of the pair of support portions 30 on the side opposite to the open end 51 of the slot 50 in the height direction (Y-axis direction) of the secondary battery 10.

  The connecting portion 40 extends, for example, in the thickness direction (X-axis direction) and the width direction (Z-axis direction) of the secondary battery 10 and has a thickness in the height direction (Y-axis direction) of the secondary battery 10. It is provided in the shape of a rectangular flat plate. The connecting portion 40 is arranged, for example, facing the battery cover 12 of the secondary battery 10. The connecting portion 40 includes, for example, a plurality of openings 41 for exposing the external terminals 13 of the plurality of secondary batteries 10, a plurality of through holes 42 communicating with the plurality of refrigerant channels 60, and a plurality of gaskets 24. , And a flow path forming groove 44.

  The openings 41 are provided at both ends of the connecting portion 40 in the width direction (Z-axis direction) of the secondary battery 10. In the width direction of the secondary battery 10, the plurality of openings 41 provided at one end of the connecting portion 40 and the plurality of openings 41 provided at the other end of the connecting portion 40 are formed in the thickness direction of the secondary battery 10. The openings 41 are staggered in the X-axis direction by half of the dimension of the openings 41. As a result, each of the openings 41 is one of the two rechargeable batteries 10 adjacent to each other among the plurality of rechargeable batteries 10 that are alternately inverted by 180 ° and stacked as described above. And the external terminal 13 of the negative electrode of the other secondary battery 10 is exposed.

  In the stacking direction (X-axis direction) of the secondary battery 10, the external terminal 13 of the positive electrode of the secondary battery 10 disposed at one end and the external terminal of the negative electrode of the secondary battery 10 disposed at the other end. The terminals 13 serve as external terminals 13 of the positive and negative electrodes of the secondary battery module 100, respectively. The opening 41 for exposing these external terminals 13 is, for example, one end of the connecting portion 40 in the width direction (Z-axis direction) of the secondary battery 10 and the connecting portion in the stacking direction (X-axis direction) of the secondary battery 10. The other opening 41 is opened at both ends of the opening 40 at a size of about half of that of the other opening 41.

  A bus bar 90 is disposed in the opening 41 that exposes the external terminals 13 of the two secondary batteries 10 that are adjacent to each other in the stacking direction (X-axis direction) of the secondary batteries 10. Thereby, one end of the bus bar 90 is in contact with the external terminal 13 of the positive electrode of one of the two secondary batteries 10 and the external terminal 13 of the negative electrode of the other secondary battery 10 is connected to the external terminal 13 of the negative electrode of the other secondary battery 10. The other end touches. The external terminal 13 of the positive electrode of one secondary battery 10 and the external terminal 13 of the negative electrode of the other secondary battery 10 are electrically connected by the bus bar 90.

  As described above, the plurality of bus bars 90 that connect the external terminals 13 of the plurality of secondary batteries 10 are arranged in the opening 41 of the connecting portion 40 and are supported by the connecting portion 40. The bus bar 90 disposed in the opening 41 is not joined to the external terminal 13 of the secondary battery 10 and can be removed. For example, the bus bar 90 is pressed against the external terminal 13 by the cover 70.

  In addition, as described above, the bus bar 90 is connected to the surface of the external terminals 13 arranged adjacent to each other in the thickness direction (X-axis direction) of the secondary battery 10 in the height direction (Y-axis direction). You. In this case, the connecting portion 40 may be configured to elastically deform in the height direction (X-axis direction) of the secondary battery 10 to press the bus bar 90 against the external terminal 13. Specifically, for example, a claw or an elastically deformable portion that is elastically deformable in the height direction (Y-axis direction) of the secondary battery 10 is provided inside the opening 41, and the bus bar 90 is formed by the claw or the elastically deformable portion. To the external terminal 13.

  Each of the through holes 42 is provided at a position corresponding to an outlet or an inlet of each of the coolant passages 60 defined by the spacer 20 attached to each of the secondary batteries 10, and connects the connecting portion 40 to the height of the secondary battery 10. Penetrating in the vertical direction (Y-axis direction). Each of the through holes 42 communicates with each of the refrigerant channels 60 and defines a channel for the refrigerant introduced into the refrigerant channel 60 or the refrigerant discharged from the refrigerant channel 60.

  Each opening 43 is provided at a position corresponding to the gasket 24 of the spacer 20 attached to each secondary battery 10. The opening 43 is opened at the bottom of the flow path forming groove 44, and the gasket 24 is disposed inside. The gas flow path defined by the gasket 24 disposed in the opening 43 opens at the bottom of the flow path forming groove 44. Thereby, the gas discharged from the gas discharge valve 12a passes through the gas flow path defined by the rectangular cylindrical gasket 24 and is discharged to the flow path forming groove 44.

  The flow channel forming groove 44 is provided in a concave shape near the center in the width direction (Z-axis direction) of the secondary battery 10 corresponding to the position of the gas discharge valve 12a of the secondary battery 10, and is formed in the stacking direction ( The connecting portion 40 is provided continuously from one end to the other end in the X-axis direction). The flow path forming groove 44 defines a gas discharge flow path 45 for discharging gas discharged from the gas discharge valve 12a between the flow path forming groove 44 and the cover 70.

  The plurality of slots 50 are defined between the pair of support portions 30, and are provided so as to be able to accommodate the individual rechargeable batteries 10 by sliding in the height direction (Y-axis direction). More specifically, the pair of support portions 30 extend inward in the width direction (Z-axis direction) of the secondary battery 10 and extend in the height direction (Y-axis direction) of the secondary battery 10, for example. It has a plurality of guide portions 31 that support both end portions in the width direction of 10 in such a manner as to be slidable in the height direction. At least both ends of the slot 50 in the width direction of the secondary battery 10 are defined by the support portion 30 and the guide portion 31.

  That is, each slot 50 has, for example, both ends in the width direction (Z-axis direction) of the secondary battery 10 defined by the support portion 30 and the guide portion 31, and the width direction (Z-axis direction) of the secondary battery 10. Is opened, and one end in the height direction (Y-axis direction) of the secondary battery 10 is an open end 51. Thereby, each slot 50 is provided so that each secondary battery 10 can be inserted from the open end 51 and slid in the height direction (Y-axis direction).

  The guide portions 31 of the pair of support portions 30 can slide the spacer 20 attached to the intermediate portion in the width direction (Z-axis direction) of the secondary battery 10 in the height direction (Y-axis direction) of the secondary battery 10. I support it. More specifically, the spacer 20 extends between the guide portions 31 of the pair of support portions 30 in the width direction and the height direction of the secondary battery 10, and the guide portions disposed on both sides in the width direction of the secondary battery 10. The secondary battery 10 is slidably supported in the height direction of the secondary battery 10.

  The cover 70 is a rectangular plate-shaped member that is disposed to face the surface of the connecting portion 40 opposite to the surface on which the plurality of secondary batteries 10 are disposed. The cover 70 detachably engages with the connecting portion 40, for example, covers the bus bar 90 arranged in the opening 41 of the connecting portion 40, and closes the opening of the flow path forming groove 44 of the connecting portion 40. Thus, a gas discharge channel 45 is defined together with the channel forming groove 44.

  The cover 70 has, for example, at a position corresponding to the opening 41 of the connecting portion 40, a plurality of convex portions 71 protruding toward the connecting portion 40 and pressing the bus bar 90 against the external terminals 13 of the secondary battery 10. . The cover 70, for example, comes into contact with the bus bar 90 when attached to the connecting portion 40 and elastically deforms in the height direction of the secondary battery 10 so that the bus bar 90 faces the external terminal 13 of the secondary battery 10. It may have an elastically deforming portion for urging.

  The cover 70 has a plurality of through-holes 72 at positions corresponding to the plurality of through-holes 42 of the connecting portion 40 communicating with the coolant channel 60. Thereby, the inlet or the outlet of the coolant channel 60 defined by the channel forming portion 23 of the spacer 20 communicates with the through hole 72 of the cover 70 via the through hole 42 of the connecting portion 40. Then, the coolant can be introduced into the inlet of the coolant channel 60 through the through hole 72, or can be discharged from the outlet of the coolant channel 60 through the through hole 72.

  Although not shown, the housing 80 may have, for example, a cover that removably engages with the pair of supports 30 and closes the open ends 51 of the plurality of slots 50. In this case, the cover that closes the open ends 51 of the plurality of slots 50 is provided with a through hole that communicates with the coolant flow path 60 defined by the spacer 20, similarly to the cover 70. Thereby, the refrigerant can be introduced into the inlet of the refrigerant channel 60 or discharged from the outlet of the refrigerant channel 60 through the through hole of the cover closing the open ends 51 of the plurality of slots 50. .

  Next, the operation of the secondary battery module 100 of the present embodiment will be described. FIG. 8 is a perspective view of a secondary battery module 100 in which a plurality of secondary batteries 10 are accommodated except for one slot 50 of a housing 80.

  As described above, the secondary battery module 100 includes a plurality of oblate rectangular secondary batteries 10, a housing 80 that stacks and holds the plurality of secondary batteries 10 in the thickness direction (X-axis direction), A spacer 20 disposed between the secondary batteries 10 adjacent in the thickness direction. The housing 80 includes a pair of support portions 30 that support the plurality of secondary batteries 10 from both sides in the width direction (Z-axis direction), a connecting portion 40 that extends in the width direction and connects the pair of support portions 30, And a plurality of slots 50 which are defined between the support portions 30 and are capable of accommodating each secondary battery 10 by being slid in the height direction (Y-axis direction). The spacer 20 has a flow path forming part 23 extending in the height direction (Y-axis direction) from the open end 51 of the slot 50 and defining a refrigerant flow path 60 facing the secondary battery 10.

  With this configuration, the secondary battery module 100 slides and accommodates the individual secondary batteries 10 in the individual slots 50 of the housing 80, so that the plurality of secondary batteries 10 are arranged at equal intervals by the spacer 20. Supported and fixed by the housing 80.

  Here, it is assumed that the flow path forming portion 23 of the spacer 20 extends in a direction intersecting the height direction (Y-axis direction) of the secondary battery 10, which is the insertion direction of the secondary battery 10. In this case, when inserting or removing the secondary battery 10, the corner of the flow path forming portion 23 of the spacer 20 crosses a part of the housing 80 or another corner of the spacer 20. Therefore, the corners of the flow path forming portion 23 of the spacer 20 may be caught by a part of the housing 80 or another spacer 20.

  On the other hand, as described above, the flow path forming portion 23 of the spacer 20 of the secondary battery module 100 of the present embodiment places the secondary battery 10 in the insertion direction of the secondary battery 10 in the height direction (Y-axis direction). ) Extend along, or substantially parallel to, the height direction. Therefore, when the secondary battery 10 is inserted or removed, the corner of the flow path forming portion 23 of the spacer 20 does not cross a part of the housing 80 or another corner of the spacer 20 and is prevented from being caught on the corner. Is done.

  Therefore, according to the secondary battery module 100, each of the secondary batteries 10 is stored in the slot 50 of the housing 80 while preventing the housing 80 and the spacer 20, which are structures holding the plurality of secondary batteries 10, from being damaged. Can be easily inserted into Further, for example, when a failure occurs in one of the plurality of secondary batteries 10 housed in the housing 80, only the secondary battery 10 is selectively damaged by the housing 80 or the spacer 20. , And can be easily taken out of the slot 50 of the housing 80.

  Further, by inserting the plurality of secondary batteries 10 into the plurality of slots 50, the secondary battery 10 extends in the height direction (Y-axis direction) from the open end 51 of the slot 50 by the flow path forming portion 23 of the spacer 20. A refrigerant passage 60 facing 10 is defined. Therefore, for example, by arranging the secondary battery module 100 so that the height direction of the secondary battery 10 is along the vertical direction, the temperature of the secondary battery 10 in the coolant channel 60 is increased by cooling the secondary battery 10. Moves upward and is naturally discharged from the outlet of the refrigerant channel 60. Then, a lower-temperature refrigerant is introduced from the inlet at the lower end of the refrigerant channel 60. Therefore, the plurality of secondary batteries 10 can be cooled by the convection of the refrigerant.

  In the secondary battery module 100 of the present embodiment, the spacer 20 is attached to each of the secondary batteries 10. Therefore, when the secondary battery 10 is inserted into or removed from the slot 50 of the housing 80, the secondary battery 10 is protected by the spacer 20. When the secondary battery 10 is inserted into or removed from the slot 50 of the housing 80, the secondary battery 10 can be guided by the spacer 20 attached to the secondary battery 10. Therefore, it is possible to easily insert and remove the individual secondary batteries 10 as compared with the related art while preventing damage to the housing 80 and the spacer 20, which are structures holding the plurality of secondary batteries 10, and the secondary batteries 10. Can be.

  Further, in the secondary battery module 100 of the present embodiment, the spacer 20 includes the narrow sides 10c on both sides in the height direction (Y-axis direction) and the wide sides on both sides in the thickness direction (X-axis direction) of the secondary battery 10. It is attached to face 10a. Thus, when the secondary battery 10 is inserted into or removed from the slot 50 of the housing 80, the narrow side surface 10c and the wide side surface 10a of the secondary battery 10 can be protected by the spacer 20.

  Further, the first spacer 20A and the second spacer 20B constituting the spacer 20 can be attached to each other by being attached from both sides in the thickness direction of the secondary battery 10, and the attachment of the spacer 20 to the secondary battery 10 is easy. become. Further, the first portions 21 of the spacers 20 respectively attached to the adjacent secondary batteries 10 are doubly arranged between the adjacent secondary batteries 10. Therefore, the shock resistance and durability of the spacer 20 are improved, and the shock resistance and durability of the secondary battery module 100 can be improved.

  In the secondary battery module 100 of the present embodiment, the pair of support portions 30 of the housing 80 extend inward in the width direction (Z-axis direction) of the secondary battery 10 and in the height direction (Y-axis direction). It has a plurality of guide portions 31 that extend and support both ends in the width direction of the secondary battery 10 so as to be slidable in the height direction. The spacer 20 is attached to a middle portion of the secondary battery 10 in the width direction, and extends in the width direction and the height direction of the secondary battery 10 between the guide portions of the pair of support portions, and is slidable in the height direction. It is supported by.

  With this configuration, when the secondary battery 10 is inserted into or removed from the slot 50 of the housing 80, the spacers 20 attached to the secondary battery 10 by the guide portions 31 on both sides in the width direction of the secondary battery 10. Can be guided in the height direction of the secondary battery 10. Therefore, while preventing damage to the housing 80 and the spacer 20, which are structures holding the plurality of rechargeable batteries 10, and the rechargeable batteries 10, the individual rechargeable batteries 10 can be more easily inserted and removed than before. Can be.

  Further, in the secondary battery module 100 of the present embodiment, the connecting portion 40 is an end of the pair of support portions 30 opposite to the open end 51 of the slot 50 in the height direction (Z-axis direction) of the secondary battery 10. And a plurality of bus bars 90 connected to the external terminals 13 of the plurality of secondary batteries 10.

  With this configuration, the bus bar 90 supported by the connecting portion 40 is inserted by inserting the secondary battery 10 into the slot 50 with the narrow side face 10 c of the secondary battery 10 provided with the external terminal 13 facing the connecting portion 40. The external terminals 13 are brought into contact with each other, and the plurality of secondary batteries 10 can be connected by the bus bar 90. Therefore, there is no need to fasten or join the external terminals 13 of the secondary battery 10 to the bus bar 90, and the individual secondary batteries 10 can be more easily inserted and removed than before.

  Further, in the secondary battery module 100 of the present embodiment, the bus bar 90 extends in the height direction of the external terminals 13 of the secondary battery 10 arranged adjacent to each other in the thickness direction (X-axis direction) of the secondary battery 10. (Y-axis direction). Therefore, when the connecting portion 40 has an elastically deforming portion that elastically deforms in the height direction (Y-axis direction) to press the bus bar 90 against the external terminal 13, the bus bar 90 is more reliably brought into contact with the external terminal 13, The connection reliability of the plurality of secondary batteries 10 can be improved.

  As described above, according to the present embodiment, the housing 80 and the spacer 20, which are structures that hold the plurality of secondary batteries 10, and the individual batteries as compared with the related art are prevented while preventing damage to the secondary batteries 10. The secondary battery module 100 from which the secondary battery 10 can be easily taken out can be provided.

[Embodiment 2]
Next, a second embodiment of the battery module of the present disclosure will be described with reference to FIGS. 9 to 11. FIG. 9 is a side view corresponding to FIG. 6 of the secondary battery module 100A according to the second embodiment. FIG. 10 is an exploded perspective view of the secondary battery 10 and the spacer 20C of the secondary battery module 100A shown in FIG. FIG. 11 is a perspective view corresponding to FIG. 8 of the secondary battery module 100A shown in FIG.

  In the secondary battery module 100A of the present embodiment, the spacer 20C has the narrow side surface 10c on both sides in the height direction (Y-axis direction) and the wide side surface 10a on one side in the thickness direction (X-axis direction) of the secondary battery 10. It is different from the secondary battery module 100 according to the first embodiment in that it is mounted so as to be opposed. Other points of the secondary battery module 100A of the present embodiment are the same as those of the secondary battery module 100 of the above-described first embodiment.

  The secondary battery module 100A of the present embodiment, like the secondary battery module 100 of Embodiment 1 described above, stacks a plurality of oblate rectangular secondary batteries 10 and the plurality of secondary batteries 10 in the thickness direction. The housing 80 includes a housing 80 to be held and a spacer 20C disposed between the secondary batteries 10 adjacent in the thickness direction. The housing 80 includes a pair of support portions 30 that support the plurality of secondary batteries 10 from both sides in the width direction, a connection portion 40 that extends in the width direction and connects the pair of support portions 30, and a pair of support portions. And a plurality of slots 50 defined between the slots 30 and capable of accommodating the individual secondary batteries 10 by sliding them in the height direction. The spacer 20 </ b> C has a flow path forming part 23 that extends from the open end 51 of the slot 50 in the height direction (Y-axis direction) and defines the refrigerant flow path 60 facing the secondary battery 10.

  Therefore, according to the secondary battery module 100A of the present embodiment, similarly to the secondary battery module 100 of the above-described first embodiment, while preventing damage to the housing 80, the spacer 20C, and the secondary battery 10, Thus, it is possible to provide a secondary battery module 100A that can easily take out the individual secondary batteries 10.

  In the secondary battery module 100A of the present embodiment, the spacer 20C is attached so as to face the narrow side surface 10c on both sides in the height direction of the secondary battery 10 and the wide side surface 10a on one side in the thickness direction. . With this configuration, the first portions 21 of the spacers 20 </ b> C accommodated in the slots 50 of the housing 80 and attached to the adjacent rechargeable batteries 10 are arranged one by one between the adjacent rechargeable batteries 10. Never be placed. Therefore, the interval between the adjacent secondary batteries 10 can be reduced, and the size or thickness of the secondary battery module 100A can be reduced.

[Embodiment 3]
Next, a third embodiment of the battery module of the present disclosure will be described with reference to FIGS. FIG. 12 is a side view corresponding to FIG. 6 of the secondary battery module 100B according to the third embodiment. FIG. 13 is a perspective view of the secondary battery 10 and the spacer 20 constituting the secondary battery module 100B shown in FIG. FIG. 14 is a schematic cross-sectional view of the secondary battery module shown in FIG. 12 taken along line XIV-XIV of 100B.

  In the secondary battery module 100B of the present embodiment, the bus bar 90 has the thickness direction (X-axis direction) of the external terminals 13 of the secondary battery 10 arranged adjacent to each other in the thickness direction (X-axis direction) of the secondary battery 10. The secondary battery module 100 is different from the secondary battery module 100 according to the first embodiment in that the secondary battery module 100 is connected to a surface facing (axial direction). Other points of the secondary battery module 100B of the present embodiment are the same as those of the secondary battery module 100 of Embodiment 1 described above, and thus, the same reference numerals are given to the same parts, and description thereof will be omitted.

  The secondary battery module 100B of the present embodiment, like the secondary battery module 100 of Embodiment 1 described above, stacks a plurality of oblate rectangular secondary batteries 10 and the plurality of secondary batteries 10 in the thickness direction. The housing 80 includes a housing 80 to be held and a spacer 20 disposed between the secondary batteries 10 adjacent in the thickness direction. The housing 80 includes a pair of support portions 30 that support the plurality of secondary batteries 10 from both sides in the width direction, a connection portion 40 that extends in the width direction and connects the pair of support portions 30, and a pair of support portions. And a plurality of slots 50 defined between the slots 30 and capable of accommodating the individual secondary batteries 10 by sliding them in the height direction. The spacer 20 has a flow path forming portion 23 extending in the height direction (Y-axis direction) from the open end 51 of the slot 50 and defining a refrigerant flow path 60 facing the secondary battery 10.

  Therefore, according to the secondary battery module 100B of the present embodiment, similarly to the secondary battery module 100 of the above-described first embodiment, while preventing the housing 80, the spacer 20, and the secondary battery 10 from being damaged, Thus, it is possible to provide the secondary battery module 100 </ b> B that can easily take out the individual secondary batteries 10.

  In the secondary battery module 100B of the present embodiment, the external terminal 13 of the secondary battery 10 has a flat plate shape that is substantially parallel to the height direction (Y-axis direction) and the width direction (Z-axis direction) of the secondary battery 10. It has the shape of Further, the bus bar 90 has a thin plate shape having a channel shape or a square U-shaped cross section. Then, in a state where the secondary batteries 10 are accommodated in the slots 50 of the housing 80, the bus bars 90 of the secondary batteries 10 arranged adjacent to each other in the thickness direction (X-axis direction) of the secondary batteries 10 are provided. It is connected to the surface of the external terminal 13 facing the thickness direction.

  With this configuration, the external terminal 13 of the secondary battery 10 is press-fitted between the bus bar 90 supported by the connecting portion 40 and the connecting portion 40, so that the external terminal 13 and the bus bar 90 are more reliably brought into contact. Thus, the connection reliability of the plurality of secondary batteries 10 can be improved.

  In the secondary battery module 100 </ b> B of the present embodiment, the bus bar 90 may be elastically deformed in the thickness direction (X-axis direction) of the secondary battery 10 and pressed against the external terminal 13. With this configuration, the external terminal 13 and the bus bar 90 can be more reliably brought into contact, and the connection reliability of the plurality of secondary batteries 10 can be improved.

[Embodiment 4]
Next, a battery module according to a fourth embodiment of the present disclosure will be described with reference to FIGS. 15 and 16. FIG. 15 is an exploded perspective view of a secondary battery module 100C according to the fourth embodiment. FIG. 16 is a perspective view of the secondary battery 10 and the spacer 20 constituting the secondary battery module 100C shown in FIG.

  The secondary battery module 100 </ b> C according to the present embodiment is different from the secondary battery module 100 </ b> C in that the external terminal 13 of the secondary battery 10 is formed in a cylindrical shape having a thread on the outer peripheral surface and is fastened to the bus bar 90 by a nut 91. 1 is different from the secondary battery module 100 according to the first embodiment. The other points of the secondary battery module 100C of the present embodiment are the same as those of the secondary battery module 100 of Embodiment 1 described above, and thus the same parts are denoted by the same reference numerals and description thereof will be omitted.

  The secondary battery module 100C of the present embodiment, like the secondary battery module 100 of Embodiment 1 described above, stacks a plurality of flat rectangular secondary batteries 10 and the plurality of secondary batteries 10 in the thickness direction. The housing 80 includes a housing 80 to be held and a spacer 20 disposed between the secondary batteries 10 adjacent in the thickness direction. The housing 80 includes a pair of support portions 30 that support the plurality of secondary batteries 10 from both sides in the width direction, a connection portion 40 that extends in the width direction and connects the pair of support portions 30, and a pair of support portions. And a plurality of slots 50 defined between the slots 30 and capable of accommodating the individual secondary batteries 10 by sliding them in the height direction. The spacer 20 has a flow path forming portion 23 extending in the height direction (Y-axis direction) from the open end 51 of the slot 50 and defining a refrigerant flow path 60 facing the secondary battery 10.

  Therefore, according to the secondary battery module 100C of the present embodiment, similarly to the secondary battery module 100 of the above-described first embodiment, while preventing the housing 80, the spacer 20, and the secondary battery 10 from being damaged, Thus, it is possible to provide a secondary battery module 100C that can easily take out the individual secondary batteries 10.

[Embodiment 5]
Next, a battery module according to a fifth embodiment of the present disclosure will be described with reference to FIGS. 17 and 18. FIG. 17 is an exploded perspective view of a secondary battery module 100D according to Embodiment 5. FIG. 18 is a perspective view of a housing 80A of the secondary battery module 100D shown in FIG. FIG. 18 shows a state where the cover 70 of the housing 80A is removed.

  The secondary battery module 100D according to the first embodiment described above is different from the secondary battery module 100D according to the first embodiment in that a spacer 46 similar to the spacer 20 is provided integrally with the connecting portion 40 and connected to the pair of supporting portions 30. It is different from the battery module 100. The other points of the secondary battery module 100D of this embodiment are the same as those of the secondary battery module 100 of Embodiment 1 described above, and thus the same parts are denoted by the same reference numerals and description thereof will be omitted.

  In the secondary battery module 100D of the present embodiment, both ends of the spacer 46 in the width direction (Z-axis direction) of the secondary battery 10 are connected to the pair of support portions 30. More specifically, both end portions of the spacer 46 are connected to the guide portion 31 provided on the support portion 30. The spacer 46 has a groove-shaped flow path forming portion 46a on the surface facing the secondary battery 10. The flow path forming portion 46 a extends in the height direction of the secondary battery 10 from the open end 51 of the slot 50 and defines a refrigerant flow path 60 facing the secondary battery 10.

  The secondary battery module 100D of the present embodiment, like the secondary battery module 100 of Embodiment 1 described above, stacks a plurality of flat rectangular secondary batteries 10 and the plurality of secondary batteries 10 in the thickness direction. The housing 80 includes a housing 80 for holding the battery and the spacer 46 disposed between the secondary batteries 10 adjacent in the thickness direction. The housing 80 includes a pair of support portions 30 that support the plurality of secondary batteries 10 from both sides in the width direction, a connection portion 40 that extends in the width direction and connects the pair of support portions 30, and a pair of support portions. And a plurality of slots 50 defined between the slots 30 and capable of accommodating the individual secondary batteries 10 by sliding them in the height direction. The spacer 46 has a flow path forming part 46 a extending in the height direction (Y-axis direction) from the open end 51 of the slot 50 and defining a refrigerant flow path 60 facing the secondary battery 10.

  Therefore, according to the secondary battery module 100D of the present embodiment, similarly to the secondary battery module 100 of Embodiment 1 described above, the housing 80, the spacer 46, and the secondary battery 10 are prevented from being damaged, Thus, it is possible to provide a secondary battery module 100D that can easily take out the individual secondary batteries 10.

  As described above, the embodiment of the secondary battery module according to the present disclosure has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above-described embodiment and may be within a range not departing from the gist of the present disclosure. Even if there are design changes, they are included in the present disclosure.

DESCRIPTION OF SYMBOLS 10 Secondary battery 10a Wide side surface 10c Narrow side surface 13 External terminal 80 Case 20 Spacer 23 Flow path forming part 30 Support part 31 Guide part 40 Connecting part 46 Spacer 46a Flow path forming part 50 Slot 51 Open end 60 Refrigerant flow path 90 Bus bar 100 secondary battery module 100A secondary battery module 100B secondary battery module 100C secondary battery module 100D secondary battery module

Claims (10)

A plurality of oblong prismatic secondary batteries, a housing that stacks and holds the plurality of secondary batteries in the thickness direction, a spacer disposed between the secondary batteries adjacent in the thickness direction, A secondary battery module comprising:
The housing includes a pair of support portions that support the plurality of secondary batteries from both sides in a width direction, a connection portion that extends in the width direction and connects the pair of support portions, and a portion between the pair of support portions. A plurality of slots that can be accommodated by sliding the individual secondary batteries in the height direction and defined in
The secondary battery module according to claim 2, wherein the spacer has a flow path forming portion extending from the open end of the slot in the height direction and defining a refrigerant flow path facing the secondary battery.   The secondary battery module according to claim 1, wherein the spacer is attached to each of the secondary batteries.   The secondary according to claim 2, wherein the spacer is attached so as to face narrow sides on both sides in the height direction of the secondary battery and wide sides on both sides in the thickness direction of the secondary battery. 4. Battery module.   The secondary battery according to claim 2, wherein the spacer is attached so as to face a narrow side surface on both sides in the height direction and a wide side surface on one side in the thickness direction of the secondary battery. Battery module. The pair of support portions include a plurality of guide portions extending inward in the width direction and extending in the height direction to support both ends of the secondary battery in the width direction so as to be slidable in the height direction. And
The spacer is attached to the intermediate portion in the width direction of the secondary battery, extends in the width direction and the height direction between the guide portions of the pair of support portions, and is slidable in the height direction. The secondary battery module according to claim 2, which is supported.   2. The secondary battery module according to claim 1, wherein both ends of the spacer in the width direction are connected to the pair of support portions. 3.   The connecting portion is connected to the height-direction ends of the pair of support portions on the side opposite to the open end of the slot, and supports a plurality of bus bars connecting external terminals of the plurality of secondary batteries. The rechargeable battery module according to claim 1, wherein:   The secondary battery according to claim 7, wherein the bus bar is connected to a surface facing the thickness direction of an external terminal of the secondary battery arranged adjacent to each other in the thickness direction. module.   The secondary battery module according to claim 8, wherein the bus bar is elastically deformed in the thickness direction and pressed against the external terminal. The bus bar is connected to a surface facing the height direction of an external terminal of the secondary battery disposed adjacent to each other in the thickness direction,
8. The secondary battery module according to claim 7, wherein the connection portion has an elastic deformation portion that elastically deforms in the height direction and presses the bus bar against the external terminal. 9.

Images