cooler

Abstract

To facilitate the arrangement of components in a battery cooler having multiple stacked battery cells. [Solution] The cooler for a battery having multiple battery cells comprises multiple cooling plates, each being an elongated member extending in a first direction with a cooling channel formed inside, and stacked in a second direction perpendicular to the first direction. Each cooling plate is configured to contact a battery cell and has multiple contact portions aligned in the first direction and non-contact portions provided between two adjacent contact portions. In the non-contact portions of two or more cooling plates continuously aligned in the second direction, an arrangement space is provided that penetrates the non-contact portion in the second direction. The arrangement spaces of the two or more cooling plates are aligned in the second direction.

Description

Technical Field

[0001] The present disclosure relates to a cooler for a battery having a plurality of stacked battery cells.

Background Art

[0002] In the battery described in Patent Document 1, it has a stacked elongated water-cooled plate assembly, and a plurality of individual battery cells are arranged in a row between adjacent water-cooled plate assemblies. And each individual battery cell is cooled by a coolant flowing inside the water-cooled plate assembly.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the shape of each water-cooled plate assembly in Patent Document 1 is an elongated rectangle, and it is difficult to arrange members so as to straddle a plurality of water-cooled plate assemblies. One aspect of the present disclosure preferably facilitates the arrangement of members in a cooler for a battery having a plurality of stacked battery cells.

Means for Solving the Problems

[0005] One aspect of the present disclosure is a battery cooler having a plurality of stacked battery cells, comprising a plurality of cooling plates, an inlet channel, and an outlet channel. The plurality of cooling plates are elongated members extending in a first direction, with cooling channels formed therein through which a refrigerant flows, and are stacked in a second direction perpendicular to the first direction. The inlet channel allows the refrigerant to flow into each of the cooling channels of the plurality of cooling plates. The outlet channel allows the refrigerant to flow out of each of the cooling channels of the plurality of cooling plates. Each of the plurality of cooling plates has an inlet, an outlet, a plurality of contact portions, and a non-contact portion. The inlet is located at the first end in the first direction and allows the refrigerant flowing down the inlet channel to flow into the cooling channel. The outlet is located at the second end in the first direction and allows the refrigerant flowing down the cooling channel to flow into the outlet channel. The plurality of contact portions are configured to contact the battery cells and are aligned in the first direction. The non-contact portions are provided between two adjacent contact portions. In the non-contact portions of two or more cooling plates that are continuously aligned in the second direction, a space is provided that penetrates the non-contact portion in the second direction and is a space for arranging other components. The space between the two or more cooling plates is aligned in the second direction.

[0006] According to the above configuration, the arrangement space aligned in the second direction forms an elongated region extending in the second direction, and components can be placed in this elongated region. Therefore, it becomes easier to arrange components in a battery cooler having multiple stacked battery cells.

[0007] In one aspect of this disclosure, an elastic body may be placed in the cooling channel located at each of the multiple contact portions in the multiple cooling plates. According to the above configuration, the contact portion can be deformed to follow the expansion and contraction of the battery cell, while also being reinforced. Therefore, even if the battery cell expands or contracts, the contact portion can be encouraged to contact the battery cell. Consequently, the decrease in the cooling performance of the cooler due to the expansion and contraction of the battery cell can be suppressed.

[0008] In one aspect of this disclosure, the arrangement space may be formed by a recess at the widthwise end of the cooling plate. The widthwise direction may be perpendicular to the first and second directions. According to the above configuration, it becomes easier to arrange components in the space where the cooling plate is placed.

[0009] In one aspect of this disclosure, arrangement spaces may be provided for all of the cooling plates so as to be aligned in the second direction from the first end to the second end in the second direction. According to the above configuration, it becomes easier to arrange components in the space where the cooling plate is positioned. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1A is a top view of the battery cooler in the first embodiment. Figure 1B is a perspective view of the cooling plate in the cooler of the first embodiment. [Figure 2] Figure 2A is an exploded perspective view of the cooler of the first embodiment. Figure 2B is a perspective view of the elastic body of the first embodiment. [Figure 3] Figure 3A is a cross-sectional view of the cooling plate and battery cell in the first embodiment, perpendicular to the longitudinal direction. Figure 3B is a perspective view of the reinforcing member arranged in the space in the first embodiment. [Figure 4] Figure 4A is a top view of the battery cooler in the second embodiment. Figures 4B and 4C are explanatory diagrams of the non-contact portion of the cooling plate in the third embodiment. [Figure 5] Figures 5A and 5B are explanatory diagrams of the non-contact portion of the cooling plate in the fourth embodiment. [Modes for carrying out the invention]

[0011] Embodiments to which this disclosure applies will be described below with reference to the drawings. [1. First Embodiment] [(1) Overview] The battery 1 of the first embodiment is, for example, installed in a vehicle configured as an electric vehicle or a hybrid vehicle and used as a power source for the vehicle's drive motor (see Figure 1A). The battery 1 has a flat shape and, for example, is installed on the underside of the floor of the vehicle body. Of course, the use of the battery 1 is not limited to powering the drive motor and can be determined as appropriate. Furthermore, the battery 1 can be used for various purposes, not just in vehicles. Also, the location where the battery 1 is installed in the vehicle is not limited to the underside of the floor and can be determined as appropriate.

[0012] Battery 1 comprises a battery pack 10, a plurality of battery cells 11, and a cooler 2 for cooling the plurality of battery cells 11 (see Figures 1A and 1B). The battery pack 10 is a case for housing multiple battery cells 11 and a cooler 2. The battery pack 10 has a flattened, roughly rectangular parallelepiped shape and is mounted on the vehicle so as to spread out along the left-right and front-back directions.

[0013] Each of the multiple battery cells 11 is a flattened rectangular parallelepiped and has elongated rectangular main surfaces 11A that overlap in the thickness direction (see Figures 1A and 1B). The battery 1 also has layers of multiple battery cells 11. In each layer, multiple (for example, four) battery cells 11 are arranged in a single row in the left-right direction with their longitudinal directions aligned. There are gaps between adjacent battery cells 11 in each layer. Each battery cell 11 is arranged so that its thickness direction coincides with the front-rear direction of the vehicle, and each layer of battery cells 11 is stacked in the front-rear direction.

[0014] [(2) Cooler] The cooler 2 comprises multiple cooling plates 3, multiple elastic bodies 4, an inlet channel 5, and an outlet channel 6 (see Figures 1A-2A).

[0015] <Cooling plate> The plurality of cooling plates 3 are members for cooling the battery cells 11, and are arranged so as to sandwich the battery cells 11 of each layer from the front side and the rear side (see FIG. 1A). That is, the cooling plates 3 are arranged between each layer of the battery cells 11, and the cooling plates 3 are arranged on the front side of the battery cells 11 located at the front end and on the rear side of the battery cells 11 located at the rear end. The plurality of cooling plates 3 are stacked along the same stacking direction S (in other words, the second direction) as each layer of the battery cells 11.

[0016] Further, each cooling plate 3 has an elongated shape extending in the longitudinal direction L (in other words, the first direction), and is flat, and is arranged such that the thickness direction coincides with the stacking direction S (see FIG. 1B). Note that the longitudinal direction L of each cooling plate 3 coincides with the left-right direction of the vehicle, and the stacking direction S coincides with the front-rear direction of the vehicle. Also, the width direction W of each cooling plate 3 orthogonal to the longitudinal direction L and the stacking direction S coincides with the up-down direction.

[0017] Each cooling plate 3 includes an inlet 32, an outlet 33, a plurality of contact portions 34, and a plurality of non-contact portions 35. A cooling flow path 31 is formed inside each cooling plate 3, and the inlet 32 and the outlet 33 of the cooling flow path 31 are provided at the left end portion (in other words, the first end portion) and the right end portion (in other words, the second end portion) of the cooling plate 3, respectively. Between the inlet 32 and the outlet 33, a plurality of contact portions 34 and a plurality of non-contact portions 35 are arranged so as to alternate in the longitudinal direction L.

[0018] Further, each cooling plate 3 is formed by overlapping two plate-like outer shell members 30 in the thickness direction of the cooling plate 3 (see FIGS. 2A and 3A). Each outer shell member 30 is made of, for example, stainless steel. A circular opening forming the inlet 32 is formed at the left end portion of each outer shell member 30, and a circular opening forming the outlet 33 is formed at the right end portion. A cooling flow path 31 through which a refrigerant for cooling the battery cells 11 flows down is formed between the overlapped outer shell members 30.

[0019] That is, each outer shell member 30 has an edge portion 30A and a central portion 30B surrounded by the edge portion 30A. By joining the edge portions 30A of each outer shell member 30 together (for example, laser welding), the cooling plate 3 is formed. And a cooling channel 31 is formed between the central portions 30B of each outer shell member 30.

[0020] <Cooling channel> The cooling channel 31 extends in the longitudinal direction L from the left end to the right end of the cooling plate 3 (see FIGS. 1A - 2A, 3A). Inlets 32 are provided on the front side and the rear side of the left end of the cooling plate 3, and outlets 33 are provided on the front side and the rear side of the right end. And the refrigerant flows into the cooling channel 31 from the inlet 32, then flows down along the longitudinal direction L, and flows out from the outlet 33.

[0021] <Contact portion> Each contact portion 34 is provided corresponding to the battery cell 11. For example, each cooling plate 3 has four contact portions 34 (see FIGS. 1A - 2A). These contact portions 34 extend in the longitudinal direction L and are substantially rectangular in plan view. Also, these contact portions 34 are arranged in the longitudinal direction L. Further, the portion of the outer shell member 所形成する各当接部34は、電池セル11の主面11Aに当接する。

[0022] Also, inside each contact portion 34, a cooling channel 31 is formed so as to have a substantially constant width and thickness and extend straight in the longitudinal direction L. Note that the width of the cooling channel 31 is the length in the width direction W of the cooling plate 3, and the thickness of the cooling channel 31 means the length in the thickness direction of the cooling plate 3.

[0023] <Non - contact portion> It should be noted that there seems to be an incomplete sentence in the original text of where some Chinese characters are left. I have translated it as best as possible based on the context. If you can provide the complete and correct text, it will be more accurate for translation.Each non-contact portion 35 is located between two adjacent contact portions 34. Furthermore, each non-contact portion 35 is positioned to face the gap between two adjacent battery cells 11 in the stacking direction S (see Figures 1A-2A). In other words, the cooler 2 has multiple rows of non-contact portions 35 that are continuously aligned in the stacking direction S from the front cooling plate 3 to the rear cooling plate 3. Additionally, a cooling channel 31 with approximately constant width and thickness is formed inside each non-contact portion 35. The width of the cooling channel 31 in each non-contact portion 35 is narrower than the width of the cooling channel 31 in the contact portion 34.

[0024] <Placement space> Each cooling plate 3 is provided with an arrangement space 35A adjacent to each non-contact portion 35, which penetrates the cooling plate 3 in the stacking direction S (see Figures 1B and 2A). The arrangement space 35A is sandwiched between two contact portions 34 located on either side of the adjacent non-contact portion 35. Each cooling plate 3 has its non-contact portions 35 arranged along the first end in the width direction W, and the arrangement space 35A is a recess, or in other words, a notched portion, formed at the second end in the width direction W of the cooling plate 3.

[0025] As an example, all the arrangement spaces 35A in the cooler 2 are formed at the lower end of the cooling plate 3. Therefore, the cooler 2 has multiple rows of arrangement spaces 35A that are continuously arranged in the stacking direction S from the front cooling plate 3 to the rear cooling plate 3, and these rows become elongated regions 35B for arranging other elongated members (see Figure 1A). As an example, in the first embodiment, three elongated regions 35B are formed. Of course, the number of elongated regions 35B can be appropriately determined according to the number of non-contacting portions 35 in each cooling plate 3.

[0026] Here, the other members may be, for example, reinforcing members 7 for multiple cooling plates 3 (Figure 3B). As an example, the reinforcing member 7 may be a straight, elongated groove-shaped member and may have a top portion 70, two side walls 71, and two base portions 72. The top portion 70, the two side walls 71, and the two base portions 72 extend from the first end to the second end of the reinforcing member 7. The top portion 70 is a straight, elongated plate-shaped portion, and the side walls 71 protrude downward from both ends of the top portion 70 in the width direction. The two base portions 72 are flange-shaped portions that protrude outward from the lower ends of each side wall 71.

[0027] Furthermore, the reinforcing members 7 located in each elongated region 35B may be joined (for example, welded) to the portion adjacent to the arrangement space 35A in each cooling plate 3. The cooler 2 may then be traded with the reinforcing members 7 located in each elongated region 35B and welded to that portion.

[0028] Furthermore, the other members are not limited to the reinforcing member 7; for example, they could be cords or the like. Of course, this is not the only option; all arrangement spaces 35A in the cooler 2 may be formed at the upper end of the cooling plate 3. Furthermore, the arrangement spaces 35A may be configured as holes penetrating the non-contact portion 35 in the thickness direction, and each cooling plate 3 may be arranged so that the arrangement spaces 35A, which are holes, are aligned in the stacking direction S.

[0029] [(3) Inlet and Outlet Channels] The inlet channel 5 has a cylindrical inlet section 50 and a plurality of connecting sections 51 (see Figures 1A to 2A). The inlet section 50 is connected to the front inlet 32 ​​of the cooling plate 3 located at the front end, and each connecting section 51 connects the inlets 32 of adjacent cooling plates 3 to each other.

[0030] The outlet channel 6 has a cylindrical outlet section 60 and a plurality of connecting sections 61. The outlet section 60 is connected to the front outlet 33 of the cooling plate 3 located at the front end, and each connecting section 51 is a cylindrical section that connects the outlets 33A of adjacent cooling plates 3.

[0031] The inlet section 50 and the multiple connection sections 51 are aligned straight in the stacking direction S, allowing the refrigerant flowing in from the inlet section 50 to flow into the cooling channel 31 through the inlet 32 ​​of each cooling plate 3. Similarly, the outlet section 60 and the multiple connection sections 61 are also aligned straight in the stacking direction S, allowing the refrigerant from the outlet 33 of each cooling plate 3 to flow out to the outside through the outlet section 60.

[0032] Furthermore, the rear inlet 32 ​​and outlet 33 of the cooling plate 3 located at the rear end are closed. Alternatively, an inlet portion 50 and an outlet portion 60 may be provided at the rear inlet 32 ​​and outlet 33 of the cooling plate 3 located at the rear end, while the front inlet 32 ​​and outlet 33 of the cooling plate 3 located at the front end may be closed.

[0033] [(4) Elastic body] In the cooling channels 31 inside each contact portion 34 of each cooling plate 3, an elastic body 4 is arranged that generates elastic force when a load in the thickness direction is applied to the contact portion 34 (see Figures 2A to 3A). The elastic body 4 is a substantially rectangular plate-shaped member, and is positioned inside the contact portion 34 so that its longitudinal direction coincides with the longitudinal direction L of the cooling plate 3. Furthermore, each elastic body 4 is not joined to each outer shell member 30 that forms the cooling plate 3, for example. Also, the elastic body 4 is configured as an assembly of multiple leaf springs 40, for example.

[0034] In other words, the multiple leaf springs 40 of the elastic body 4 are V-shaped and arranged in a matrix along the longitudinal and transverse directions. In the first embodiment, as an example, six leaf springs 40 are arranged in the transverse direction.

[0035] Of course, the shape of each leaf spring 40 is not limited to a V-shape and can be determined as appropriate, and the position of each leaf spring 40 can also be determined as appropriate. Furthermore, the elastic body 4 may be composed of springs other than leaf springs 40. Specifically, for example, the elastic body 4 may be composed of multiple coil springs arranged in a matrix or a wire mesh. Alternatively, the elastic body 4 may be composed of an elastic material such as rubber or resin.

[0036] Furthermore, each elastic body 4 may be joined to each outer shell member 30 that forms the cooling plate 3. Also, elastic bodies 4 do not need to be placed in the cooling channels 31 inside each contact portion 34 of each cooling plate 3.

[0037] [2. Second Embodiment] The cooler 2 of the second embodiment differs from the first embodiment in the number of arrangement spaces 35A in each cooling plate 3. That is, in the first embodiment, arrangement spaces 35A are formed in all non-contact portions 35 of each cooling plate 3, and the cooler 2 has three elongated regions 35B that extend in the stacking direction S from the front cooling plate 3 to the rear cooling plate 3.

[0038] In contrast, the cooler 2 of the second embodiment has at least one elongated region 35B formed thereon. The end of the elongated region 35B may be located on the front or rear cooling plate 3, or it may be located on a cooling plate 3 that is not located on the front or rear. In other words, in the second embodiment, at least one arrangement space 35A is formed on two or more cooling plates 3, and at least one elongated region 35B is formed by two or more arrangement spaces 35A provided on these cooling plates 3 and arranged continuously in the stacking direction S.

[0039] Of course, for example, each cooling plate 3 may be provided with at least one arrangement space 35A, and these arrangement spaces 35A may form at least one elongated region 35B. Alternatively, for example, the cooler 2 may have at least one elongated region 35B extending from the front cooling plate 3 to the rear cooling plate 3.

[0040] As an example, as shown in Figure 4A, elongated regions 35B may be provided at the rightmost non-contact portion 35 and the leftmost non-contact portion 35 of each cooling plate 3. Furthermore, elongated regions 35B may be provided at the central non-contact portion 35 of a plurality of cooling plates 3 located in front of the center in the front-to-back direction, while elongated regions 35B may not be provided at the central non-contact portion 35 of a plurality of cooling plates 3 located behind the center. In other words, two elongated regions 35B may be formed in the stacking direction S from the front end cooling plate 3 to the rear end cooling plate 3, and one elongated region 35B may be formed between them in the stacking direction S from the front end cooling plate 3 to the central cooling plate 3.

[0041] [3. Third Embodiment] The cooler 2 of the third embodiment differs from the first embodiment in the configuration of the cooling channels 31 in each cooling plate 3. Specifically, in the first embodiment, the width of the cooling channel 31 in each contact portion 34 is wider than the width of the cooling channel 31 in each non-contact portion 35. However, in the third embodiment, the widths of the cooling channels 31 in each contact portion 34 and each non-contact portion 35 are approximately the same. This allows for smoother refrigerant flow, which can improve cooling efficiency.

[0042] In other words, as an example, as shown in Figure 4B, at each contact portion 34, the cooling channel 31 may extend along the lower end in the width direction W and bend upward near the non-contact portion 35. At each non-contact portion 35, the cooling channel 31 may extend along the upper end in the width direction W.

[0043] Conversely, as an example, as shown in Figure 4B, at each contact portion 34, the cooling channel 31 may extend along the upper end in the width direction W and bend downward near the non-contact portion 35. At each non-contact portion 35, the cooling channel 31 may extend along the lower end in the width direction W.

[0044] [4. Fourth Embodiment] The fourth embodiment of the cooler 2 differs from the first embodiment in that an adjustment section is provided in the section of the cooling flow path 31 at each contact portion 34 of each cooling plate 3 to adjust the flow of the refrigerant. The adjustment section is a region into which the refrigerant cannot enter. For example, the adjustment section may be formed by providing a recess in the central portion 30B of the two outer shell members 30 that form the section and joining the recesses together. Alternatively, it may be formed by arranging a member that contacts the central portion 30B of the two outer shell members 30 that form the section.

[0045] Specifically, as an example, as shown in Figure 5A, an elongated adjustment portion 31A extending in the longitudinal direction L may be provided at the center of the cooling channel 31 in the longitudinal direction L and the center in the width direction W of each contact portion 34. For example, the adjustment portion 31A is approximately rectangular when viewed in the thickness direction of the contact portion 34 and is positioned at a predetermined distance from the boundary between the contact portion 34 and the non-contact portion 35 and from the end of the cooling channel 31 in the width direction W.

[0046] In the cooling passage 31 of each contact portion 34, there is a risk of stagnation of refrigerant flow in the center of the width direction W at a location away from the boundary with the non-contact portion 35. In contrast, by providing the adjustment portion 31A as described above, refrigerant is prevented from flowing into locations where stagnation of refrigerant flow is likely to occur. Therefore, it is possible to promote uniform refrigerant flow in the cooling passage 31 of each contact portion 34, and as a result, cooling efficiency may be improved.

[0047] In addition, as shown in Figure 5B, for example, an adjustment section 31B may be provided near the boundary between each contact section 34 and the non-contact section 35 in the cooling channel 31. As an example, the adjustment section 31B is approximately square when viewed in the thickness direction of the contact section 34.

[0048] By providing such adjustment units 31B, each contact unit 34 can divert the flow of refrigerant flowing into the cooling channel 31 of the non-contact unit 35, and also divert the flow of refrigerant flowing in from the cooling channel 31 of the non-contact unit 35. This promotes a more uniform flow of refrigerant, which in turn can improve cooling efficiency.

[0049] [5. Effects] (1) According to the cooler 2 of the above embodiment, the arrangement space 35A aligned in the stacking direction S forms an elongated region 35B extending in the stacking direction S, and other elongated members can be arranged in the elongated region 35B. Therefore, it becomes easier to arrange members in the cooler 2 of a battery 1 having a plurality of stacked battery cells 11.

[0050] Furthermore, by arranging the components in the elongated area 35B, space can be saved. Also, since the arrangement space 35A is provided in the non-contact portion 35, it is possible to arrange the components in the cooler 2 while suppressing interference with the cooling capacity of the cooling plate 3.

[0051] Furthermore, by placing the reinforcing member 7 in the elongated region 35B, the strength of the cooler 2 is improved. This makes it possible to thin the outer shell member 30 of each cooling plate 3, thereby reducing the weight of the cooler 2.

[0052] (2) In addition, elastic bodies 4 are placed at each contact portion 34 of each cooling plate 3. This allows the contact portion 34 to deform in accordance with the expansion and contraction of the battery cell 11, while also reinforcing the contact portion 34. As a result, even if the battery cell 11 expands or contracts, the contact portion 34 can be encouraged to contact the battery cell 11, thereby suppressing a decrease in the cooling performance of the cooler 2.

[0053] (3) Each arrangement space 35A is formed as a recess at the end of the cooling plate 3 in the width direction W. The elongated region 35B extends from the front end of the cooling plate 3 to the rear end of the cooling plate 3. Therefore, the elongated region 35B makes it easier to arrange the components.

[0054] [6. Other Embodiments] (1) In the above embodiment, the battery 1 is mounted on the vehicle such that the longitudinal direction L of each cooling plate 3 coincides with the left-right direction, and the stacking direction coincides with the front-rear direction. However, the battery 1 can be mounted on the vehicle in various orientations.

[0055] (2) Multiple functions of one component in the above embodiment may be realized by multiple components, or one function of one component may be realized by multiple components. Also, multiple functions of multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Furthermore, some of the configurations of the above embodiment may be omitted. Also, at least some of the configurations of the above embodiment may be added to or replaced with the configurations of other above embodiments.

[0056] [7. The technical concepts disclosed herein] [Item 1] A battery cooler having multiple stacked battery cells, An elongated member extending in a first direction, with a cooling channel formed inside through which a refrigerant flows, comprising a plurality of cooling plates stacked in a second direction perpendicular to the first direction, An inlet passage for introducing the refrigerant into the cooling passage of each of the plurality of cooling plates, An outlet channel for discharging the refrigerant from each of the cooling channels of the plurality of cooling plates, Equipped with, Each of the aforementioned multiple cooling plates is An inlet located at the first end in the first direction, which allows the refrigerant flowing down the inlet channel to flow into the cooling channel, An outlet located at the second end in the first direction, which allows the refrigerant flowing down the cooling channel to flow into the outlet channel, A plurality of contact portions arranged in the first direction, configured to contact the aforementioned battery cell, It has a non-contact portion provided between two adjacent contact portions, In the non-contact portions of two or more cooling plates that are continuously arranged in the second direction among the plurality of cooling plates, an arrangement space is provided which is a space that penetrates the non-contact portion in the second direction and is a space for arranging other members. The arrangement space of the two or more cooling plates is aligned in the second direction. cooler.

[0057] [Item 2] The cooler described in item 1, An elastic body is placed in the cooling channel located at each of the multiple contact portions in the multiple cooling plates. cooler.

[0058] [Item 3] A cooler as described in item 1 or item 2, The aforementioned arrangement space is formed by recesses at the widthwise ends of the cooling plate, The width direction is the direction perpendicular to the first and second directions. cooler.

[0059] [Item 4] A cooler described in any one of items 1 to 3, The arrangement space is provided for all of the plurality of cooling plates so as to be aligned in the second direction, from the first end to the second end in the second direction. cooler. [Explanation of Symbols]

[0060] S...Layering direction, L...Longest direction, W...Width direction, 1...Battery, 10...Battery pack, 11...Battery cell, 11A...Main surface, 2...Cooler, 3...Cooling plate, 30...Outer shell member, 30A...Edge, 30B...Center, 31...Cooling channel, 31A,31B...Adjustment section, 32...Inlet, 33...Outlet, 34...Contact section, 35...Non-contact section, 35A...Placement space, 35B...Longest region, 4...Elastic body, 40...Leaf spring, 41...Frame section, 5...Inlet channel, 50...Inlet section, 51...Connection section, 6...Outlet channel, 60...Outlet section, 61...Connection section, 7...Reinforcement member, 70...Top, 71...Side wall, 72...Base.

Claims

1. A battery cooler having multiple stacked battery cells, An elongated member extending in a first direction, with a cooling channel formed inside through which a refrigerant flows, comprising a plurality of cooling plates stacked in a second direction perpendicular to the first direction, An inlet passage for introducing the refrigerant into the cooling passage of each of the plurality of cooling plates, An outlet channel for discharging the refrigerant from each of the cooling channels of the plurality of cooling plates, Equipped with, Each of the aforementioned multiple cooling plates is An inlet located at the first end in the first direction, which allows the refrigerant flowing down the inlet passage to flow into the cooling passage, An outlet located at the second end in the first direction, which allows the refrigerant flowing down the cooling channel to flow into the outlet channel, A plurality of contact portions arranged in the first direction are configured to contact the aforementioned battery cell, It has a non-contact portion provided between two adjacent contact portions, In the non-contact portion of two or more cooling plates among the plurality of cooling plates that are continuously arranged in the second direction, an arrangement space is provided, which is a space that penetrates the non-contact portion in the second direction and is for arranging other members. The arrangement space of the two or more cooling plates is aligned in the second direction. cooler.

2. A cooler according to claim 1, An elastic body is placed in the cooling channel located at each of the multiple contact portions in the multiple cooling plates. cooler.

3. A cooler according to claim 1 or claim 2, The aforementioned arrangement space is formed by recesses at the widthwise ends of the cooling plate, The width direction is the direction perpendicular to the first and second directions. cooler.

4. A cooler according to claim 1 or claim 2, The arrangement space is provided for all of the plurality of cooling plates so as to be aligned in the second direction, from the first end to the second end in the second direction. cooler.

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