Battery Pack

Abstract

The first embodiment of the present disclosure relates to a battery pack that is configured to be mounted on a vehicle, and includes a battery stack, an air supply component, and a partition component. The battery stack includes a plurality of battery modules stacked in a first direction. The air supply component is fixed relative to the battery stack and divides an internal space extending along a first side surface of the battery stack in a second direction orthogonal to the first direction. The partition component divides the internal space of the air supply component in the first direction into a plurality of air supply passages, each of which extends in the second direction and is configured to be connected to an air supply device.

Description

Technical Field

[0001] The present disclosure relates to a battery pack configured to be mountable on a vehicle. Background Art

[0002] As such a battery pack, there is known a battery pack comprising: a substantially rectangular package case, the package case being mounted on a vehicle with its long side along the front-to-back direction of the vehicle; a plurality of battery stacks, the battery stacks comprising a plurality of flat box-shaped battery modules stacked in the vertical direction inside the package case; and a cooling unit, the cooling unit being arranged at one end of the length direction of the package case (for example, refer to Japanese Patent Application Laid-Open No. 2016-219260). The cooling unit of the battery pack comprises: a sirocco fan, the sirocco fan being driven to rotate by an electric motor to blow air; an inlet, the inlet extending elongated along the front-to-back direction of the vehicle and opening toward one side in the width direction of the vehicle; an evaporator, the evaporator cooling the air sucked in through the inlet; and a discharge portion, the discharge portion being connected to a blower duct having a plurality of blower outlets. The blower duct extends in the front-to-back direction along one long side of the package case, and each blower outlet opens toward the side of the corresponding stack. Thus, the air cooled by the evaporator is supplied from the discharge portion along the outer circumference of the package body to the respective blowout ports of the air supply passage, and is sent from the respective blowout ports toward the corresponding stack. Summary of the invention

[0003] However, in the above-mentioned battery pack, the cross-sectional area of ​​the passage changes (increases) sharply at the connection between the discharge portion of the cooling unit and the air supply duct and between adjacent blowout ports, creating areas where air is difficult to flow at each blowout port. Therefore, in one stack, the temperature does not become uniform as a whole, and even the temperature between multiple stacks varies. In addition, in the above-mentioned battery pack, when the cross-sectional area of ​​the passage in the cooling unit is gradually changed (increased) by extending the air supply duct, the size of the battery pack is increased.

[0004] Therefore, the present disclosure provides a battery pack capable of uniformly cooling a battery stack including a plurality of battery modules stacked in one direction while suppressing an increase in the size of the battery pack.

[0005] The first embodiment of the present disclosure relates to a battery pack that is configured to be mounted on a vehicle, and includes a battery stack, an air supply component, and a partition component. The battery stack includes a plurality of battery modules stacked in a first direction. The air supply component is fixed relative to the battery stack and divides an internal space extending along a first side surface of the battery stack in a second direction orthogonal to the first direction. The partition component divides the internal space of the air supply component in the first direction into a plurality of air supply passages that extend in the second direction, respectively, and are configured to be connected to an air supply device.

[0006] In the battery pack according to the first embodiment of the present disclosure, the position of the air supply member is fixed relative to the battery stack including a plurality of battery modules stacked in the first direction. The air supply member divides the internal space extending in the second direction orthogonal to the first direction, i.e., the stacking direction of the battery modules, along the first side of the battery stack. In addition, the internal space of the air supply member is divided into a plurality of air supply passages in the first direction. Moreover, the plurality of air supply passages extend in the second direction, respectively, and are connected to the blower. Thus, the cross-sectional area of ​​each air supply passage can be made close to the opening area of ​​the discharge port of the blower, so when air is supplied from the blower to each air supply passage, the generation of areas where air is difficult to flow can be well suppressed. Therefore, air can be supplied to the battery stack without omission from each air supply passage, so that the battery stack can be cooled in a manner that makes the overall temperature uniform. Moreover, since it is no longer necessary to extend (expand) the air supply member in order to suppress the rapid change in the cross-sectional area of ​​the passage, the increase in the size of the battery pack can be well suppressed. As a result, the battery pack of the present disclosure can uniformly cool the battery stack including the plurality of battery modules stacked in the first direction while suppressing an increase in size.

[0007] In addition, the first direction may be the vertical direction of the vehicle, and the battery pack may be mounted on the vehicle in a manner such that the second direction is parallel to the vehicle width direction of the vehicle. Thus, the space efficiency of a vehicle equipped with a battery pack including a plurality of battery modules (battery stacks) stacked (flat stacked) in the vertical direction can be improved.

[0008] The multiple air supply passages may include a first air supply passage on the first side in the first direction and a second air supply passage on the second side, the air supply device may include a first blower and a second blower, and the air supply component may be a component including a first air supply port and a second air supply port, the first air supply port being connected to the first air supply passage on the first side in the second direction and being configured to be connected to a first exhaust port of the first blower, and the second air supply port being connected to the second air supply passage on the second side in the second direction and being configured to be connected to a second exhaust port of the second blower.

[0009] The area of ​​the first discharge port may be substantially the same as the cross-sectional area of ​​the first air supply passage, and the area of ​​the second discharge port may be substantially the same as the cross-sectional area of ​​the second air supply passage.

[0010] In addition, the battery stack may include a plurality of air passages having openings on the first side and the second side opposite to the first side, and disposed between adjacent battery modules, the internal space of the air supply member may be connected to the openings of the plurality of air passages on the first side, the position of the exhaust member that divides the exhaust portion may be fixed relative to the battery stack, and the exhaust portion is configured so that air flowing out of the openings of the plurality of air passages on the second side flows to the outside. Thus, the entire battery stack can be efficiently and evenly cooled.

[0011] The partition member may be a member that supports a wire harness connected to the components of the battery stack. This allows the air flow in each air supply passage to be uniform without being disturbed, thereby improving the cooling efficiency of the battery stack. Furthermore, since there is no need to separately prepare wiring space and components for the wire harness, it is possible to effectively suppress the increase in the size of the battery pack, the increase in the number of components, the increase in cost, etc.

[0012] Furthermore, the partition member may include a storage space for inserting the wire harness. Thus, it is possible to extremely effectively suppress disturbance of the flow of air in each air supply passage.

[0013] The partition member may include a first member, a second member, and an elastic member, wherein the first member is fixed relative to the battery stack and extends in the second direction, the second member is engaged with the first member and divides the storage space together with the first member, extends in the second direction and protrudes toward the inner surface of the air supply member, and the elastic member is fixed to the top end of the second member and contacts the inner surface of the air supply member. Thus, the assembly of the partition member and the wiring of the wiring harness can be further improved.

[0014] The tip end portion of the second member may be a tip end portion on the opposite side of a portion fitted with the first member.

[0015] The battery pack according to the first aspect of the present disclosure may further include a pack case that accommodates the battery stack, and the gas supply member may be fixed to the pack case.

[0016] The battery pack according to the first aspect of the present disclosure may further include a pack case that accommodates the battery stack, the exhaust member may be fixed to the pack case, and the exhaust portion may be a gap between the exhaust member and the pack case.

[0017] The battery pack according to the first aspect of the present disclosure may further include a pack case that accommodates the battery stack, and the first member may be fixed to the pack case. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which like reference numerals represent like elements, and in which:

[0019] Figure 1 1 is a schematic diagram showing the configuration of a vehicle equipped with the battery pack of the present disclosure.

[0020] Figure 2 is a perspective view showing a battery pack of the present disclosure.

[0021] Figure 3 It is along Figure 2 Cross-sectional view along line III-III.

[0022] Figure 4 It is along Figure 2 Cross-sectional view along line IV-IV. DETAILED DESCRIPTION

[0023] Next, a mode for carrying out the invention of the present disclosure will be described with reference to the drawings.

[0024] Figure 1 1 is a schematic diagram showing a vehicle V equipped with the battery pack 1 of the present disclosure. The vehicle V shown in the figure is an electric vehicle (BEV) or a hybrid vehicle (HEV, PHEV) that includes, in addition to the battery pack 1, an electric power control device including an inverter, etc., and a system main relay (both are omitted in the figure) connected to the battery pack 1 and capable of exchanging power with the battery pack 1 to output power for driving and regenerative braking force. In the present embodiment, the battery pack 1 is fixed to the body of the vehicle V in a manner located below the rear seats (second row of seats).

[0025] Battery pack 1, such as Figure 2 and Figure 3As shown, it includes, for example, a single battery stack 2 including a plurality of battery modules 20 connected in series, and a housing 3 for housing the battery stack 2. Each battery module 20 of the battery stack 2 includes: a flat and relatively slender roughly rectangular parallelepiped module housing 21, a plurality of battery cells (not shown) housed in the module housing 21, and positive and negative terminals (not shown) protruding from the side surfaces of the short sides of the module housing 21. The battery cells constituting the battery module 20 are nickel-hydrogen secondary batteries or lithium-ion secondary batteries provided as so-called stacked cells, and include an outer casing formed of a flexible stacked film, and a sheet-like positive electrode, a negative electrode, and a separator (electrode stack) stacked together with an electrolyte and housed inside the outer casing. For example, a plurality of battery cells are connected in series and housed inside the module housing 21 in a stacked state in the thickness direction (up and down direction).

[0026] A plurality of battery modules 20, such as Figure 3 As shown, the battery modules 20 are stacked (flat-stacked) in the thickness direction (vertical direction) and integrated with each other via spacers (spacers) 22 having a planar shape that is approximately rectangular in shape and an insulating sheet that is not shown. The spacer 22 has a plurality of recessed portions that extend parallel to the side surfaces of the short sides and are arranged along the side surfaces of the long sides, and is sandwiched between two battery modules 20 that are adjacent in the thickness direction (vertical direction). Thus, in the battery stack 2, a plurality of air passages 25 are provided using the plurality of recessed portions of each spacer 22. That is, the plurality of air passages 25 extend along the side surfaces of the short sides of the battery stack 2 between the battery modules 20 that are adjacent in the thickness direction (vertical direction), and, as shown in FIG. Figure 3 As shown, the battery stack 2 has openings at a first side surface (one side surface) 2sf on the long side and a second side surface (the other side surface) 2sr on the opposite side to the first side surface 2sf.

[0027] The pack case 3 includes: an upper case half 4, which is located on the upper side when the battery pack 1 is mounted on the vehicle V; a lower case half 5, which is located on the lower side when the battery pack 1 is mounted on the vehicle V; a plurality of pillars 6; a first side cover 7 as an air supply member; a second side cover 8 as an exhaust member; and an extended case 9. The upper case half 4 is formed of metal or resin in a manner covering the upper surface of the battery stack 2 and the upper part of both end surfaces, and has a substantially rectangular plan shape. The lower case half 5 is formed of metal or resin in a manner covering the lower surface of the battery stack 2 and the lower part of both end surfaces, and has a substantially rectangular plan shape.

[0028] like Figure 3As shown, the upper shell half 4 and the lower shell half 5 are integrated via a plurality of pillars 6, and the battery stack 2 is arranged between the upper shell half 4 and the lower shell half 5 and fixed by both. The plurality of pillars 6 are arranged at intervals in the length direction of the upper shell half 4 and the lower shell half 5 between the side ends of both sides (long sides) of the upper shell half 4 and the side ends of both sides (long sides) of the lower shell half 5. Thus, an opening (not shown) is provided between adjacent pillars 6, which is opposite to the first side 2sf or the second side 2sr of the battery stack 2 and allows air to flow.

[0029] The first side cover 7 of the enclosure body 3 is formed by, for example, pressing a metal plate, and has a length in the longitudinal direction substantially the same as that of the upper shell half 4 and the lower shell half 5. Figure 3 As shown, the first side cover 7 includes: a channel portion 7a having a substantially C-shaped cross-sectional shape; an upper fixing portion 7b extending from the channel portion 7a at the Figure 3 and a lower fixing portion 7c, the lower fixing portion 7c from the channel portion 7a in the Figure 3 The lower edge of the middle portion extends downward in the figure.

[0030] The upper fixing portion 7b of the first side cover 7 is fixed to one side of the upper casing half 4 (at Figure 3 The lower fixing portion 7c is fixed to one side of the lower shell half 5 (on the left side in Figure 3 The side surface of the battery module 20 is the left side of the battery module 20. It can be fixed by, for example, welding or fastening with screws. It can also be fixed by techniques other than welding, and it can also be fixed by components other than screws. Thus, the multiple openings provided between adjacent pillars 6 are covered by the first side cover 7, and the internal space divided by the channel portion 7a extends along the multiple pillars 6 and the first side 2sf of the battery stack 2 in a direction (second direction) orthogonal to the stacking direction of the battery module 20, that is, the up and down direction (first direction) and the extension direction of the air passage 25. Moreover, the internal space of the channel portion 7a is connected to the openings of the multiple air passages 25 provided in the battery stack 2 on the first side 2sf side of the battery stack 2.

[0031] The second side cover 8 of the enclosure body 3 is formed by, for example, pressing a metal plate, and has a length in the longitudinal direction substantially the same as that of the upper shell half 4 and the lower shell half 5. Figure 3As shown, the second side cover 8 is fixed to a plurality of pillars 6 arranged along the second side surface 2sr of the battery stack 2, and defines a space that communicates with the openings of the plurality of air passages 25 provided in the battery stack 2 on the second side surface 2sr. The second side cover 8 can be fixed by, for example, welding or screwing. It can also be fixed by a technique other than welding, or by a member other than screws. Moreover, in the present embodiment, the second side cover 8 is fixed at the Figure 3 The upper end of the upper shell half 4 and the other side ( Figure 3 Between the side surfaces of the second side cover 8 and the right side of the second side cover 8 Figure 3 The lower end of the lower shell half 5 and the other side ( Figure 3 A gap is provided between the sides of the 200A and 200B (the right side in the figure). This gap can be regarded as an exhaust portion.

[0032] The extended shell 9 of the package shell 3, such as Figure 2 As shown, the upper case half 4 and the lower case half 5 are connected near the center of the longitudinal direction of the package case 3 in a manner protruding from the first side cover 7 to the side opposite to the second side cover 8. A junction box (not shown), other electrical equipment, etc. are accommodated inside the extension case 9.

[0033] In addition, a partition member (partitioner) 10 is disposed in the internal space of the tunnel portion 7a of the first side cover 7. The partition member 10 is Figure 3 As shown in FIG. 1 , the inner space of the duct portion 7a is arranged near the center in the vertical direction, and the inner space is divided (partitioned) into two in the vertical direction (first direction) of the stacking direction of the battery modules 20. Figure 3 and Figure 4 As shown, a first air supply passage P1 on the upper side (one side) in the stacking direction of the battery module 20 and a second air supply passage P2 on the lower side (the other side) are provided in the internal space of the passage portion 7a. The first and second air supply passages P1 and P2 have approximately the same passage cross-sectional area, and extend in a direction (second direction) orthogonal to the stacking direction of the battery module 20 and the extension direction of the air passage 25, respectively. Furthermore, a first air supply port 7ia and a second air supply port 7ib are provided in the passage portion 7a of the first side cover 7. The first air supply port 7ia is provided at an end portion ( 7ia. 7ia. 7ia. 7ia. 7ia. 7ia. 7ia. 7ia. 7ia. 7ia. 7ia. Figure 4 In addition, the second air supply port 7ib is provided at the end portion (on the other side in the second direction) of the channel portion 7a in a manner communicating with the second air supply passage P2. Figure 4 the left end in the figure).

[0034] In this embodiment, the partition member 10 includes a first member 11 and a second member 12 each having a length in the longitudinal direction substantially the same as that of the tunnel portion 7a (internal space) of the first side cover 7. The first member 11 is formed of a resin such as Figure 3 As shown, it has a substantially C-shaped cross-sectional shape. That is, the first member 11 includes a back portion and a recessed portion opened on the opposite side of the back portion, and the back portion of the first member 11 is fixed to a plurality of pillars 6 of the housing 3 arranged along the first side 2sf of the battery stack 2 in a manner that the recessed portion is opposite to the inner surface of the channel portion 7a of the first side cover 7. The first member 11 can be fixed by, for example, welding, screw fastening, or adhesive. It can also be fixed by techniques other than welding, by using substances other than adhesives, or by using members other than screws. Thus, the first member 11 extends along the plurality of pillars 6 and the first side 2sf of the battery stack 2 in a direction (second direction) orthogonal to both the stacking direction of the battery module 20 and the extension direction of the air passage 25.

[0035] The second member 12 is formed of resin and has the same Figure 3 The second member 12 is provided with a plurality of engaging portions 12a that engage with the corresponding protrusions 11a on the upper and lower sides thereof. The second member 12 is engaged with the first member 11 via the plurality of protrusions 11a and the plurality of engaging portions 12a, and defines a storage space 10a together with the first member 11 by closing the recess (opening) of the first member 11. In addition, the second member 12 extends along the first side surface 2sf of the battery stack 2 in a direction (second direction) orthogonal to the stacking direction of the battery modules 20 and the extension direction of the air passage 25, and protrudes toward the inner surface of the channel portion 7a of the first side cover 7. Moreover, an elastic member 13 such as a resin sponge is fixed to the top end of the second member 12 in such a manner as to contact the inner surface of the channel portion 7a. Fixing can be performed using, for example, an adhesive. Fixing can also be performed using a substance other than an adhesive.

[0036] When the partition member 10 is arranged in the internal space of the tunnel portion 7a, first, the back of the first member 11 is fixed relative to the plurality of pillars 6 (battery stack 2). Next, the wiring harness WH connected to the constituent members of the battery stack 2, namely, various sensors provided in the battery stack 2, is arranged in the recessed portion of the first member 11. Furthermore, the first member 11 and the second member 12 are interlocked with each other in a manner that supports (holds) the wiring harness WH, and the first side cover 7 is fixed to the upper shell half 4 and the lower shell half 5 in a manner that the inner surface of the tunnel portion 7a contacts the elastic member 13. Thus, as Figure 3As shown, the wire harness WH is inserted into the storage space 10a partitioned by the first member 11 and the second member 12, and is supported (held) by the partition member 10 in the internal space of the tunnel portion 7a, and the interior of the tunnel portion 7a is divided into a plurality of parts by the partition member 10.

[0037] The battery pack 1 constructed as described above is Figure 2 As shown, the first side cover 7 and the extended shell 9 are located on the front side of the vehicle V, and the length direction of the shell 3 is parallel to the vehicle width direction of the vehicle V, and are arranged and fixed below the rear seats (second row seats). Fixing can be performed using, for example, a bracket. The fixing member is not limited to the bracket. That is, the first side cover 7 of the battery pack 1, the partition member 10, and the first side surface 2sf of the battery stack 2 extend in the vehicle width direction at a position closer to the front side of the vehicle than the second side cover 8, the second side surface 2sr of the battery stack 2, etc. As a result, the space efficiency of the vehicle V equipped with a battery pack 1 including a plurality of battery modules 20 (battery stack 2) stacked (flat stacked) in the up and down direction can be improved.

[0038] Moreover, if Figure 2 As shown, the discharge port DP1 of the first blower B1 disposed on the front side of the enclosure 3 and on the left side in the vehicle width direction is connected to the first air supply port 7ia of the first side cover 7 (duct portion 7a), and the discharge port DP2 of the second blower B2 disposed on the front side of the enclosure 3 and on the right side in the vehicle width direction is connected to the second air supply port 7ib of the first side cover 7 (duct portion 7a). The first and second blowers B1 and B2 are electric blowers of the same specification controlled by a control device not shown in the figure. By disposing the first and second blowers B1 and B2 at intervals in the vehicle width direction on the vehicle body, the space efficiency of the vehicle V can be further improved. In the present embodiment, a cooler (heat exchanger) not shown in the figure is disposed in the discharge ports DP1 and DP2 of the first and second blowers B1 and B2, for example, to share a refrigerant with an air conditioner that performs air conditioning in the vehicle interior of the vehicle V to cool the air sent from the first and second blowers B1 and B2. The supply of refrigerant to each cooler is controlled by the above-mentioned control device according to the temperature of the battery stack 2 (each battery module 20), etc. However, the cooler may be omitted from the discharge ports DP1 and DP2 of the first and second blowers B1 and B2, and the air sent from the first and second blowers B1 and B2 may be cooled by the air in the vehicle cabin (in summer, the cooling air from the air conditioner).

[0039] When the first and second blowers B1 and B2 are operated while the vehicle V is traveling, air is supplied from the discharge port DP1 of the first blower B1 to the first air supply passage P1 provided in the duct portion 7a of the first side cover 7 via the first air supply port 7ia. In addition, air is supplied from the discharge port DP2 of the second blower B2 to the second air supply passage P2 provided in the duct portion 7a of the first side cover 7 via the second air supply port 7ib. Figure 3 It can be seen that the air supplied to the first air supply passage P1 flows into the plurality of air passages 25 provided in the upper half of the battery stack 2 through the openings between the adjacent struts 6. The air flowing into the plurality of air passages 25 removes heat from the upper half of the battery stack 2, and flows out to the outside of the enclosure 3 from the gap between the side surface of the upper shell half 4 and the upper end of the second side cover 8 through the space divided by the second side cover 8. Figure 3 It can be seen that the air supplied to the second air supply passage P2 flows into the plurality of air passages 25 disposed in the lower half of the battery stack 2 through the openings between the adjacent struts 6. The air flowing into the plurality of air passages 25 removes heat from the lower half of the battery stack 2, and flows out to the outside of the enclosure 3 from the gap between the side surface of the lower shell half 5 and the lower end of the second side cover 8 through the space divided by the second side cover 8.

[0040] Here, in the battery pack 1, the upper first air supply passage P1 and the lower second air supply passage P2 are provided by dividing the internal space of the first side cover 7 (duct portion 7a) in the stacking direction of the battery modules 20 using the partition member 10. Figure 4 As shown, the cross-sectional areas of the first and second air supply passages P1 and P2 can be made close to (substantially the same as) the opening areas of the discharge ports DP1 and DP2 of the first and second blowers B1 and B2, so when air is supplied from the first or second blower B1 and B2 to the first and second air supply passages P1 and P2, the generation of areas where air is difficult to flow can be well suppressed. Therefore, air can be supplied to the battery stack 2 without omission from the first and second air supply passages P1 and P2, respectively, and the battery stack 2 can be cooled in a manner that makes the overall temperature uniform.

[0041] In addition, when the partition member 10 is not provided in the battery pack 1, the cross-sectional area of ​​the internal space of the duct portion 7a increases sharply relative to the passage cross-sectional area of ​​the discharge ports DP1 and DP2, and a region is generated where the air flowing straight from the discharge ports DP1 and DP2 of the first and second blowers B1 and B2 does not flow smoothly (see Figure 4 In order to avoid this situation, the first side cover 7 needs to be moved toward the first side surface 2sf of the battery stack 2 in such a manner that the area does not face the first side surface 2sf of the battery stack 2. Figure 4In contrast, if the internal space of the tunnel portion 7a is divided by the partition member 10 to provide the first and second air supply passages P1 and P2, it is possible to suppress a sudden change (sudden increase) in the passage cross-sectional area, so that it is not necessary to extend the first side cover 7, and it is possible to effectively suppress the increase in the size of the battery pack 1 (pack case 3). As a result, in the battery pack 1, it is possible to suppress the increase in size and uniformly cool the battery stack 2 including a plurality of battery modules 20 stacked (flat-stacked) in the vertical direction.

[0042] Furthermore, the battery stack 2 includes a plurality of air passages 25 having openings at the first side surface 2sf and the second side surface 2sr on the opposite side of the first side surface 2sf, and provided between adjacent battery modules 20. Thus, air is supplied to each air passage 25 from the first and second air supply passages P1 and P2, respectively, and the air flowing out of the plurality of air passages 25 flows out to the outside through the exhaust portion (the gap between the second side cover 8 and the package body 3) divided by the second side cover 8 as an exhaust member, thereby efficiently and evenly cooling the entire battery stack 2. However, the plurality of air passages 25 do not necessarily need to be arranged in the battery stack 2 as described above, and may, for example, pass through the module body 21 of each battery module 20.

[0043] In addition, in the above-mentioned embodiment, the partition member 10 has a storage space 10a through which the wire harness WH connected to various sensors and the like provided in the battery stack 2 is inserted, and the wire harness WH is supported (held) in the internal space of the first side cover 7 (channel portion 7a). As a result, the turbulence of the flow of air in the first and second air supply passages P1 and P2 can be extremely well suppressed, thereby improving the cooling efficiency of the battery stack 2. Moreover, since it is no longer necessary to separately prepare a wiring space for the wire harness WH and components for wiring, it is possible to well suppress the increase in the size of the battery pack 1, the increase in the number of components, the increase in cost, etc. However, the partition member 10 can be a member that supports the wire harness WH in a manner that does not disturb the flow of air and makes it uniform, and it may be a partition member that does not necessarily have the storage space 10a through which the wire harness WH is inserted.

[0044] Furthermore, in the above-mentioned embodiment, the partition member 10 includes the first member 11, the second member 12, and the elastic member 13, the first member 11 being fixed in position relative to the battery stack 2 and extending in the direction (second direction) perpendicular to the stacking direction of the battery modules 20, the second member 12 being engaged with the first member 11 and defining the storage space 10a together with the first member 11, extending in the direction (second direction) perpendicular to the stacking direction and protruding toward the inner surface of the first side cover 7 (channel portion 7a), and the elastic member 13 being fixed to the top end of the second member 12 and contacting the inner surface of the first side cover 7. Thus, by sequentially assembling the first member 11, the second member 12, and the first side cover 7 relative to the upper case half 4 and the lower case half 5 (battery stack 2), the internal space of the channel portion 7a can be divided into a plurality of spaces by the partition member 10, and the wire harness WH can be routed in the internal spaces. As a result, in the battery pack 1 , the assembling properties of the partition member 10 and the routing properties of the wire harness WH can be further improved.

[0045] Furthermore, in the battery pack 1, a plurality of partition members that divide the internal space of the tunnel portion 7a in the stacking direction of the battery modules 20 may be provided with respect to the first side cover 7, and three or more air supply passages may be provided in the internal space of the tunnel portion 7a. Furthermore, the battery pack 1 may include a plurality of battery stacks, each of which includes a plurality of battery modules 20 stacked in the vertical direction, and the plurality of battery stacks may be arranged in the pack case 3 in a row along the longitudinal direction.

[0046] In addition, the invention disclosed herein is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the disclosure. Moreover, the above-mentioned embodiments are only a specific form of the invention described in the invention content item, and do not limit the elements of the invention described in the invention content item.

[0047] The invention disclosed herein can be utilized in the battery pack manufacturing industry.

Claims

1. A battery pack configured to be mounted on a vehicle, It is characterized in that comprising a battery stack, a gas supply component and a partition component, The battery stack includes a plurality of battery modules stacked in a first direction. The air supply member is fixed in position relative to the battery stack and defines an internal space extending in a second direction orthogonal to the first direction along a first side surface of the battery stack. The partition member divides the internal space of the air supply member into a plurality of air supply passages in the first direction, and the plurality of air supply passages extend in the second direction and are configured to be connected to the air supply device. The partition member supports a wire harness (WH) connected to a constituent member of the battery stack, The partition member has a storage space through which the wire harness is inserted.

2. The battery pack according to claim 1, It is characterized in that The first direction is the up-down direction of the vehicle, The battery pack is mounted on the vehicle such that the second direction is parallel to a vehicle width direction of the vehicle.

3. The battery pack according to claim 1 or 2, It is characterized in that The plurality of air supply passages include a first air supply passage on a first side in the first direction and a second air supply passage on a second side. The air supply device comprises a first air supply fan and a second air supply fan, The air supply member includes a first air supply port and a second air supply port, The first air supply port communicates with the first air supply passage on the first side in the second direction and is configured to be connected to a first discharge port of a first blower. The second air supply port communicates with the second air supply passage on the second side in the second direction and is configured to be connected to a second discharge port of a second blower.

4. The battery pack according to claim 3, It is characterized in that The area of ​​the first discharge port is substantially the same as the cross-sectional area of ​​the first air supply passage. The area of ​​the second discharge port is substantially the same as the cross-sectional area of ​​the second air supply passage.

5. The battery pack according to claim 1 or 2, It is characterized in that The battery stack includes a plurality of air passages each having an opening on the first side surface and a second side surface opposite to the first side surface and provided between adjacent battery modules. The internal space of the air supply member communicates with the openings of the plurality of air passages on the first side surface. The position of the exhaust member that defines the exhaust section is fixed relative to the battery stack, and the exhaust section is configured so that air flowing out from the openings of the plurality of air passages on the second side surface flows to the outside.

6. The battery pack according to claim 1 or 2, It is characterized in that The partition member comprises: a first member fixed relative to the battery stack and extending in the second direction; a second member which is engaged with the first member to define the storage space together with the first member, extends in the second direction and protrudes toward the inner surface of the air supply member; and An elastic member is fixed to the front end portion of the second member and is in contact with the inner surface of the air supply member.

7. The battery pack according to claim 6, It is characterized in that The distal end portion of the second member is a distal end portion on the opposite side of a portion fitted with the first member.

8. The battery pack according to claim 1 or 2, It is characterized in that It also includes a housing for housing the battery stack. The air supply member is fixed to the enclosure body.

9. The battery pack according to claim 5, It is characterized in that It also includes a housing for housing the battery stack. The exhaust member is fixed to the housing. The exhaust portion is a gap between the exhaust member and the package shell.

10. The battery pack according to claim 6, It is characterized in that It also includes a housing for housing the battery stack. The first member is fixed to the casing.

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