Square battery shell, battery, power battery pack and electric vehicle

Abstract

The embodiment of the utility model provides a square battery shell, a battery, a power battery pack and an electric vehicle, and relates to the technical field of batteries. The square battery shell comprises a first battery cell accommodating cavity and at least two heat exchange cavities, the first battery cell accommodating cavity is provided with a battery cell accommodating space, the battery cell accommodating space is used for accommodating a first battery cell, the heat exchange cavities are provided with heat exchange channels, and the at least two heat exchange cavities are respectively connected to a plurality of outer walls of the first battery cell accommodating cavity; due to the fact that the square battery shell is provided with the at least two heat exchange cavities, multi-side heat dissipation of the first battery cell in the square battery shell can be achieved, that is, multi-side cooling of the battery can be achieved, effective heat dissipation is conducted, and the possibility that the battery is overheated in the using process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a square battery casing, a battery, a power battery pack and an electric vehicle. Background Art

[0002] As an important tool for energy conversion and storage, the performance and safety of batteries are receiving more and more attention. Among them, the battery case, as the main component of the battery, has an important impact on the performance and safety of the battery. If the battery overheats during use and cannot effectively dissipate heat, it may cause safety problems.

[0003] In the prior art, a battery pack is mainly composed of a tray, a binder, a battery cell, and an integrated battery cover. The water-cooled heat exchange liquid channel is in the integrated battery cover, but only one-side cooling can be achieved, and the battery heat dissipation performance is poor. Utility Model Content

[0004] The utility model provides a square battery housing, a battery, a power battery pack and an electric vehicle, which can realize multi-side cooling of the battery, effectively dissipate heat and reduce the possibility of overheating of the battery during use.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the utility model provides a square battery housing, comprising:

[0007] A first battery cell accommodating cavity, wherein the first battery cell accommodating cavity is provided with a battery cell accommodating space, and the battery cell accommodating space is used to accommodate the first battery cell; and

[0008] At least two heat exchange cavities are provided with heat exchange channels, and the at least two heat exchange cavities are respectively connected to multiple outer walls of the first battery cell accommodating cavity.

[0009] In an optional embodiment, the first battery cell accommodating cavity includes a first square shell, a first electrode plate and a second electrode plate, the first square shell is used to accommodate the first battery cell, both ends of the first square shell are open to form a first square opening and a second square opening respectively, the first electrode plate and the second electrode plate are respectively arranged at the first square opening and the second square opening to seal the first square opening and the second square opening;

[0010] Wherein, the at least two heat exchange chambers are respectively connected to multiple outer walls of the first square shell.

[0011] In an optional embodiment, the number of the heat exchange chambers is two, and the two heat exchange chambers are respectively connected to two opposite side walls of the first square shell.

[0012] In an optional embodiment, the side walls and top walls of the first battery cell accommodating cavity are both 0.4-0.6 mm thick, the bottom wall of the first battery cell accommodating cavity is 0.8-1.2 mm thick, and the bottom wall of the first battery cell accommodating cavity is used to set an explosion-proof valve.

[0013] In an optional embodiment, there are multiple heat exchange channels, adjacent heat exchange channels are separated from each other, a heat exchange channel manifold is provided at the end of the heat exchange cavity, one end of the heat exchange channel manifold is open to form a confluence, the confluence simultaneously connects multiple heat exchange channels, and the other end of the heat exchange channel manifold is provided with a liquid flow hole, and the liquid flow hole is connected to the confluence.

[0014] In an optional embodiment, the square battery case further includes a second battery cell accommodating cavity, which is used to accommodate a second battery cell, and the second battery cell accommodating cavity is arranged on a side of one of the heat exchange cavities away from the first battery cell accommodating cavity.

[0015] In an optional embodiment, the number of the second battery cell accommodating cavities is two, and the two second battery cell accommodating cavities are respectively arranged on a side of one of the heat exchange cavities away from the first battery cell accommodating cavity.

[0016] In a second aspect, the utility model provides a battery, comprising a first battery cell and the square battery casing described in any one of the aforementioned embodiments, wherein the first battery cell is disposed in the battery cell accommodating space.

[0017] In an optional embodiment, the battery also includes a second battery cell, and the square battery shell also includes a second battery cell accommodating cavity, the second battery cell accommodating cavity is used to accommodate a second battery cell, the second battery cell accommodating cavity is arranged on a side of one of the heat exchange cavities away from the first battery cell accommodating cavity, and the second battery cell is arranged in the second battery cell accommodating cavity.

[0018] In a third aspect, the utility model provides a power battery pack, comprising a plurality of the aforementioned embodiments or batteries described in the aforementioned embodiments arranged in sequence.

[0019] In a fourth aspect, the utility model provides an electric vehicle, comprising the power battery pack described in the aforementioned embodiment.

[0020] The beneficial effects of the square battery housing, battery, power battery pack and electric vehicle of the embodiments of the utility model include, for example:

[0021] The utility model provides a square battery shell, which includes a first battery cell accommodating cavity and at least two heat exchange cavities, the first battery cell accommodating cavity is provided with a battery cell accommodating space, the battery cell accommodating space is used to accommodate the first battery cell, the heat exchange cavity is provided with a heat exchange channel, and the at least two heat exchange cavities are respectively connected to multiple outer walls of the first battery cell accommodating cavity. Since the square battery shell is designed with at least two heat exchange cavities, multi-side heat dissipation of the first battery cell in the square battery shell can be achieved, that is, it can achieve multi-side cooling of the battery, effectively dissipate heat, and reduce the possibility of overheating of the battery during use.

[0022] The utility model provides a battery, which comprises a first battery core and the above-mentioned square battery shell. The first battery core is arranged in the battery core accommodating space, and the battery has all the functions of the above-mentioned square battery shell.

[0023] The utility model provides a power battery pack, which comprises a plurality of batteries mentioned above arranged in sequence, and has all the functions of the batteries mentioned above.

[0024] The utility model provides an electric vehicle, which comprises the above-mentioned power battery pack and has all the functions of the above-mentioned power battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a power battery pack provided in an embodiment of the present utility model;

[0027] Figure 2 This is an exploded schematic diagram of a power battery pack provided in an embodiment of the present utility model;

[0028] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0029] Figure 4 An exploded view of a portion of the structure of a power battery pack provided in an embodiment of the present utility model;

[0030] Figure 5 A schematic diagram of a partial structure of a square battery housing provided in an embodiment of the present utility model;

[0031] Figure 6A schematic diagram of a heat exchange channel manifold provided in an embodiment of the utility model from a first perspective;

[0032] Figure 7 This is a schematic diagram from a second perspective of the heat exchange channel manifold provided in an embodiment of the present utility model.

[0033] Icons: 100-first battery cell accommodating cavity; 101-battery cell accommodating space; 110-first square shell; 120-first electrode plate; 200-heat exchange cavity; 201-heat exchange channel; 300-heat exchange channel manifold; 310-manifold; 320-liquid flow hole; 400-electrode plate connecting harness; 500-second battery cell accommodating cavity; 510-second square shell; 520-third electrode plate; 1000-battery; 1100-collector; 2100-housing. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0038] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0039] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0040] As mentioned in the background technology, as an important tool for energy conversion and storage, the performance and safety of batteries are receiving more and more attention. Among them, the battery shell, as the main component of the battery, has an important impact on the performance and safety of the battery. If the battery overheats during use and cannot effectively dissipate heat, it may cause safety problems.

[0041] In the prior art, most square battery cases do not have a heat exchange fluid channel design. For example, the battery pack is mainly composed of a tray, a binder, a battery cell, and an integrated battery cover. The water-cooled heat exchange fluid channel is in the integrated battery cover, but only one-sided cooling can be achieved, and the battery heat dissipation performance is poor.

[0042] In view of this, please refer to Figure 1-Figure 7 The square battery housing, battery 1000, power battery pack and electric vehicle provided in the embodiments of the present invention can solve this problem, which will be described in detail below.

[0043] like Figure 1 and Figure 2 As shown, a power battery pack is provided in an embodiment of the utility model, and the power battery pack can be applicable to electric vehicles.

[0044] The power battery pack includes a shell 2100 and a plurality of batteries 1000 arranged in sequence. The plurality of batteries 1000 arranged in sequence constitute a battery 1000 module. The battery 1000 module is arranged on the shell 2100. The battery 1000 includes a first battery cell and a square battery shell. The first battery cell is arranged in the battery cell accommodating space 101 of the square battery shell (described in detail below).

[0045] Specifically, the square battery shell includes a first battery cell accommodating cavity 100 and at least two heat exchange cavities 200. The first battery cell accommodating cavity 100 is provided with a battery cell accommodating space 101, and the battery cell accommodating space 101 is used to accommodate the first battery cell. The heat exchange cavity 200 is provided with a heat exchange channel 201, and the heat exchange channel 201 is used for heat exchange liquid (such as cooling water) to realize the heat dissipation process of the battery 1000. At least two heat exchange cavities 200 are respectively connected to multiple outer walls of the first battery cell accommodating cavity 100.

[0046] Here, a plurality of outer walls is understood to mean at least two outer walls, for example two outer walls or three outer walls.

[0047] Since the square battery shell is designed with at least two heat exchange chambers 200, multi-side heat dissipation of the first battery cell in the square battery shell can be achieved. In other words, multi-side cooling of the battery 1000 is achieved to effectively dissipate heat and reduce the possibility of overheating of the battery 1000 during use.

[0048] It should be noted that the first battery cell accommodating cavity 100 can be integrally formed with all the heat exchange cavities 200, for example, by using an extrusion molding or extrusion molding process, which is convenient for reducing costs compared to a welding process.

[0049] Of course, in some embodiments, the first battery cell accommodating cavity 100 may be spliced ​​with all the heat exchange cavities 200 , wherein both the first battery cell accommodating cavity 100 and the heat exchange cavity 200 may be made of aluminum alloy.

[0050] The heat exchange fluid enters from one end of the heat exchange fluid channel and is discharged from the other end, so as to promptly remove the heat emitted by the first battery cell in the first battery cell accommodating cavity 100, improve the thermal management efficiency of the battery 1000, and ensure that the battery 1000 operates within the optimal operating temperature range.

[0051] For more details, please refer to Figure 3-Figure 5 The first battery cell accommodating cavity 100 includes a first square shell 110, a first electrode plate 120 and a second electrode plate (not shown). It is easy to understand that the cross-section of the first square shell 110 is a rectangular ring structure.

[0052] The first square shell 110 is used to accommodate the first battery cell. Both ends of the first square shell 110 are open to form a first square opening and a second square opening respectively.

[0053] The first electrode plate 120 and the second electrode plate are respectively disposed at the first square opening and the second square opening to seal the first square opening and the second square opening. Specifically, the first electrode plate 120 and the second electrode plate can be respectively connected to the first square opening and the second square opening by welding.

[0054] Among them, at least two heat exchange chambers 200 are respectively connected to multiple outer walls of the first square shell 110.

[0055] In this embodiment, if Figure 5 As shown, there are two heat exchange chambers 200, and the two heat exchange chambers 200 are respectively connected to the left and right side walls opposite to each other of the first square shell 110, so that heat can be dissipated on both sides of the battery 1000 and the heat dissipation efficiency can be improved.

[0056] Of course, in other embodiments, the number of heat exchange chambers 200 can be three, two of which are respectively connected to the left and right side walls of the first square shell 110, and the remaining heat exchange chamber 200 is arranged on the outside of the top wall of the first square shell 110 to improve the heat dissipation efficiency.

[0057] It should be noted that each heat exchange cavity 200 has multiple heat exchange channels 201, such as two, three or four, and adjacent heat exchange channels 201 are separated from each other. The size and number of the heat exchange channels 201 can be adjusted according to specific needs to meet the heat dissipation requirements under different working conditions.

[0058] For example, the cross-sectional shape of the heat exchange channel 201 may be rectangular, circular, or other shapes.

[0059] It should be noted that for the convenience of convergence, please refer to Figure 6 , Figure 7 as well as Figure 3 A heat exchange channel manifold 300 is provided at the end of the heat exchange cavity 200, one end of the heat exchange channel manifold 300 is opened to form a manifold 310, and the manifold 310 is connected to multiple heat exchange channels 201 at the same time. A liquid flow hole 320 is provided at the other end of the heat exchange channel manifold 300, and the liquid flow hole 320 is connected to the manifold 310.

[0060] Specifically, the confluence port 310 of the heat exchange channel confluence piece 300 can be sealed and connected to the port of the heat exchange channel 201 by welding.

[0061] The power battery pack includes a plurality of heat exchange channel manifolds 300. In order to facilitate the re-manifolding, Figure 2 and Figure 3 As shown, the power battery pack also includes two collecting tubes 1100, which are located on opposite sides of the entire battery 1000 module. Each collecting tube 1100 is connected to the liquid flow holes 320 of multiple heat exchange channel manifolds 300 at the same time to realize the entry and outflow of cooling water, thereby completing the heat dissipation process of the battery 1000.

[0062] Of course, in some embodiments, the number of the heat exchange channel 201 of each heat exchange chamber 200 may also be one.

[0063] In addition, it should be noted that in order to reduce costs, in the present embodiment, the battery 1000 also includes a second battery cell, and the square battery shell also includes a second battery cell accommodating cavity 500. The second battery cell accommodating cavity 500 can refer to the structure of the above-mentioned first battery cell accommodating cavity 100. Specifically, the second battery cell accommodating cavity 500 accommodates a second battery cell, and the second battery cell accommodating cavity 500 is arranged on the side of one of the heat exchange cavities 200 away from the first battery cell accommodating cavity 100.

[0064] In some embodiments, for example Figure 5 As shown in , the number of the second battery cell accommodating cavities 500 of the square battery housing can be two, and the two second battery cell accommodating cavities 500 are respectively arranged on a side of one of the heat exchange cavities 200 away from the first battery cell accommodating cavity 100 .

[0065] The second battery cell accommodating cavity 500 includes a second square shell 510, a third pole plate 520 and a fourth pole plate (not shown), that is, both ends of the second square shell 510 are open to form a third square opening and a fourth square opening, respectively. The third pole plate 520 and the fourth pole plate are respectively arranged at the third square opening and the fourth square opening to seal the third square opening and the fourth square opening. Specifically, the third pole plate 520 and the fourth pole plate can be respectively connected to the third square opening and the fourth square opening by welding.

[0066] Of course, the power battery pack in this embodiment includes a battery 1000 module composed of multiple batteries 1000, that is, the heat exchange chambers 200 on both sides of the first battery cell accommodating chamber 100 are connected to a second square shell 510 of a second battery cell accommodating chamber 500.

[0067] The second square shell 510 may be connected to the adjacent heat exchange cavity 200 by integral molding, or the second square shell 510 may be spliced ​​to the adjacent heat exchange cavity 200 .

[0068] It is easy to understand that the structure in which a first battery cell accommodating cavity 100 connected to two heat exchange cavities 200 is distributed between the two second battery cell accommodating cavities can be understood as a sandwich structure, and can also achieve double-sided heat dissipation of the battery 1000, and can drive the heat of the first battery cell and the second battery cell at the same time, without the need for all the batteries 1000 in the battery 1000 module to be composed of the structure of the first battery cell accommodating cavity 100 connected to two heat exchange cavities 200 arranged in sequence.

[0069] Of course, in some embodiments, the batteries 1000 in the battery 1000 module may all be composed of a structure in which two first battery cell accommodating cavities 100 connected to the heat exchange cavities 200 are arranged in sequence.

[0070] It should be noted that the second square shell 510 may also be an existing square battery shell 1000.

[0071] In addition, in order to facilitate the electrical connection between the multiple first battery cells and the multiple second battery cells in the battery 1000 module, the power battery pack also includes multiple plate connecting harnesses 400, and the adjacent first pole plates 120 and third pole plates 520 are electrically connected through a pole plate connecting harness 400, the first pole plate 120 is electrically connected to the first battery cell in the first square shell 110, and the third pole plate 520 is electrically connected to the second battery cell in the second square shell 510.

[0072] Similarly, the adjacent second electrode plate and fourth electrode plate are electrically connected via a electrode plate connecting harness 400 , the second electrode plate is electrically connected to the first battery cell in the first square shell 110 , and the fourth electrode plate is electrically connected to the second battery cell in the second square shell 510 .

[0073] Please refer again Figure 5 The wall thickness of the side wall and the top wall of the first square shell 110 of the first battery cell accommodating cavity 100 are both 0.4-0.6 mm, and the wall thickness of the side wall and the top wall can be 0.4 mm, 0.5 mm or 0.6 mm.

[0074] The thickness of the bottom wall of the first square shell 110 of the first battery cell accommodating cavity 100 is 0.8-1.2 mm. For example, the thickness of the bottom wall of the first square shell 110 may be 0.8 mm, 1 mm or 1.2 mm.

[0075] An explosion-proof valve (not shown) is provided on the bottom wall of the first square shell 110 of the first battery cell accommodating cavity 100. In the present embodiment, a structural design with unequal wall thickness is adopted, which is conducive to providing space for the installation of the explosion-proof valve at the bottom. For example, an installation through hole is provided on the bottom wall of the first square shell 110. The depth of the installation through hole can be greater, which is convenient for installing the explosion-proof valve. At the same time, the explosion-proof valve is on the bottom wall of the first battery cell accommodating cavity 100, so that the explosion-proof valve faces downward. There is no need to point the explosion-proof valve toward the inside of the electric vehicle, which provides passengers with more escape time.

[0076] It should be noted that an explosion-proof valve may also be installed on the bottom wall of the second square shell 510 of the second battery cell accommodating cavity 500 .

[0077] An embodiment of the utility model also provides an electric vehicle, which includes the above-mentioned power battery pack. The battery 1000 of the electric vehicle can effectively dissipate heat, reduce the possibility of overheating of the battery 1000 during use, and improve the safety of the electric vehicle.

[0078] To summarize, the square battery shell includes a first battery cell accommodating cavity 100 and at least two heat exchange cavities 200. The first battery cell accommodating cavity 100 is provided with a battery cell accommodating space 101, and the battery cell accommodating space 101 is used to accommodate the first battery cell. The heat exchange cavity 200 is provided with a heat exchange channel 201, and at least two heat exchange cavities 200 are respectively connected to multiple outer walls of the first battery cell accommodating cavity 100.

[0079] Since the square battery shell is designed with at least two heat exchange chambers 200, multi-side heat dissipation of the first battery cell in the square battery shell can be achieved. In other words, it can achieve multi-side cooling of the battery 1000, effectively dissipate heat, and reduce the possibility of overheating of the battery 1000 during use.

[0080] At the same time, the power battery pack with the square battery shell does not need to be provided with a battery 1000 cover, and has both the simple structure and reliable packaging performance of the conventional square battery 1000 shell and the excellent heat dissipation performance of the battery 1000 shell with a heat exchange liquid channel, while also reducing costs.

[0081] The battery 1000 includes a first battery cell and the above-mentioned square battery casing. The first battery cell is disposed in the battery cell accommodating space 101 . The battery 1000 has all the functions of the above-mentioned square battery casing.

[0082] The power battery pack includes a plurality of the above-mentioned batteries 1000 arranged in sequence, and the power battery pack has all the functions of the above-mentioned batteries 1000 .

[0083] The electric vehicle comprises the above-mentioned power battery pack, and the electric vehicle has all the functions of the above-mentioned power battery pack.

[0084] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A square battery case, characterized in that: include: A first battery cell accommodating cavity (100), wherein the first battery cell accommodating cavity (100) is provided with a battery cell accommodating space (101), and the battery cell accommodating space (101) is used to accommodate a first battery cell; as well as At least two heat exchange cavities (200), each heat exchange cavity (200) being provided with a heat exchange channel (201), and each of the at least two heat exchange cavities (200) being respectively connected to a plurality of outer walls of the first battery cell accommodating cavity (100).

2. The square battery case according to claim 1, characterized in that: The first battery cell accommodating cavity (100) comprises a first square shell (110), a first electrode plate (120) and a second electrode plate, the first square shell (110) being used to accommodate the first battery cell, both ends of the first square shell (110) being open to form a first square opening and a second square opening respectively, the first electrode plate (120) and the second electrode plate being respectively arranged at the first square opening and the second square opening to seal the first square opening and the second square opening; Wherein, the at least two heat exchange chambers (200) are respectively connected to a plurality of outer walls of the first square shell (110).

3. The square battery case according to claim 2, characterized in that: The number of the heat exchange chambers (200) is two, and the two heat exchange chambers (200) are respectively connected to two opposite side walls of the first square shell (110).

4. The square battery case according to claim 1, characterized in that: The side walls and top walls of the first battery cell accommodating cavity (100) have a wall thickness of 0.4-0.6 mm, the bottom wall of the first battery cell accommodating cavity (100) has a wall thickness of 0.8-1.2 mm, and the bottom wall of the first battery cell accommodating cavity (100) is used to set an explosion-proof valve.

5. The square battery case according to claim 1, characterized in that: The number of the heat exchange channels (201) is multiple, and adjacent heat exchange channels (201) are separated from each other. A heat exchange channel manifold (300) is provided at the end of the heat exchange chamber (200), and one end of the heat exchange channel manifold (300) is open to form a confluence port (310), and the confluence port (310) simultaneously connects the multiple heat exchange channels (201), and the other end of the heat exchange channel manifold (300) is provided with a liquid flow hole (320), and the liquid flow hole (320) is connected to the confluence port (310).

6. The square battery case according to claim 1, characterized in that: The square battery casing further comprises a second battery cell accommodating cavity (500), wherein the second battery cell accommodating cavity (500) is used to accommodate a second battery cell, and the second battery cell accommodating cavity (500) is arranged on a side of one of the heat exchange cavities (200) away from the first battery cell accommodating cavity (100).

7. The square battery case according to claim 6, characterized in that: The number of the second battery cell accommodating cavities (500) is two, and the two second battery cell accommodating cavities (500) are respectively arranged on a side of one of the heat exchange cavities (200) away from the first battery cell accommodating cavity (100).

8. A battery, characterized in that: It comprises a first battery cell and the square battery casing according to any one of claims 1 to 5, wherein the first battery cell is arranged in the battery cell accommodating space (101).

9. The battery according to claim 8, characterized in that The battery further comprises a second battery cell, and the square battery shell further comprises a second battery cell accommodating cavity (500), wherein the second battery cell accommodating cavity (500) is used to accommodate the second battery cell, and the second battery cell accommodating cavity (500) is arranged on a side of one of the heat exchange cavities (200) away from the first battery cell accommodating cavity (100), and the second battery cell is arranged in the second battery cell accommodating cavity (500).

10. A power battery pack, characterized in that: The invention comprises a plurality of batteries according to claim 8 or claim 9 arranged in sequence.

11. An electric vehicle, characterized in that: Including the power battery pack as described in claim 10.

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