Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, and relates to the technical field of lithium batteries, and the battery module comprises a battery cell group, a liquid cooling plate, a first fixing bracket and a second fixing bracket. Wherein the battery cell group comprises a first end plate, a second end plate and a plurality of battery cells; correspondingly, in order to conveniently correspond to the first end plate and the second end plate, the two opposite ends of the liquid cooling plate are defined as a first end part and a second end part respectively. On the basis, the first fixing bracket is connected with the first end part and is connected with the first end plate, so that the first end part of the liquid cooling plate is correspondingly connected with the first end plate; and the second fixed bracket is connected with the second end part and is connected with the second end plate, so that the second end part of the liquid cooling plate is correspondingly connected with the second end plate. On the basis, the side surface of the battery cell can be cooled, so that the problem of high temperature when the battery cell is quickly charged is correspondingly solved. Moreover, based on this, the cooling efficiency and the heat dissipation efficiency of the battery module are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and more specifically, to a battery module and a battery pack. Background Art

[0002] With the significant increase in the cell capacity, cell height, and fast charging demand of commercial vehicle battery systems, the technical requirements for battery cooling are also increasing day by day.

[0003] However, through research by the inventor, it is found that due to the increase in cell capacity and height, when using the traditional bottom cooling scheme, the overall thermal management efficiency of the battery pack is low. Moreover, at high charging rates, more heat is generated by the battery, and it is difficult to dissipate heat in a timely and effective manner only by bottom cooling. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery module and a battery pack, which can improve the cooling efficiency and heat dissipation efficiency and solve the problem of high temperature during fast charging of the battery cells.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides a battery module, including:

[0007] A cell group, which includes a first end plate, a second end plate, and a plurality of cells, and the plurality of cells are clamped between the first end plate and the second end plate;

[0008] A liquid cooling plate, with opposite ends being a first end and a second end respectively;

[0009] A first fixing bracket and a second fixing bracket, the first fixing bracket is connected to the first end and is also connected to the first end plate; the second fixing bracket is connected to the second end and is also connected to the second end plate.

[0010] In an optional embodiment, the first fixing bracket includes a first plate portion and a second plate portion, the first plate portion and the second plate portion are connected at an angle, the first plate portion is welded to the first end, and the second plate portion is connected to the first end plate.

[0011] In an optional embodiment, the second fixing bracket includes a third plate portion and a fourth plate portion, the third plate portion and the fourth plate portion are connected at an angle, the third plate portion is connected to the second end, and the fourth plate portion is connected to the second end plate.

[0012] In an optional embodiment, a rivet nut is provided on the third plate portion, and the battery module further includes a first fixing bolt, and the first fixing bolt connects the rivet nut and the second end.

[0013] In an alternative embodiment, the number of battery cell groups is at least two. When the liquid cooling plate is located between two adjacent battery cell groups, the battery module further includes a third fixing bracket, which is connected to the second end plate and is sequentially connected to the second end portion and the rivet nut through a first fixing bolt.

[0014] In an alternative embodiment, the third fixing bracket includes a fifth plate portion and a sixth plate portion, which are connected at an angle. The fifth plate portion is provided with a through hole for mating with the first fixing bolt, and the sixth plate portion is connected to the second end plate.

[0015] In an alternative embodiment, both the first end plate and the second end plate are provided with rivet nuts. The battery module further includes a second fixing bolt, and the second fixing bolt connects the rivet nut to the first fixing bracket or the second fixing bracket.

[0016] In an alternative embodiment, the number of battery cell groups is at least two; when the liquid cooling plate is located between two adjacent battery cell groups, both sides opposite to the first end portion are connected to the first fixing bracket.

[0017] In a second aspect, the present utility model provides a battery pack, including the battery module according to any one of the foregoing embodiments and a battery box for accommodating the battery module.

[0018] In an alternative embodiment, the battery box includes an upper cover and a lower box body, and the bottom wall of the lower box body is a cooling plate.

[0019] The beneficial effects of the embodiments of the present utility model include:

[0020] The present application provides a battery module and a battery pack. The battery module includes a battery cell group, a liquid cooling plate, a first fixing bracket, and a second fixing bracket. Among them, the battery cell group includes a first end plate, a second end plate, and a plurality of battery cells, and the plurality of battery cells are clamped between the first end plate and the second end plate. Correspondingly, to facilitate correspondence with the first end plate and the second end plate, the two opposite ends of the liquid cooling plate are defined as a first end portion and a second end portion respectively. On this basis, the first fixing bracket is connected to the first end portion and is connected to the first end plate, so that the first end portion of the liquid cooling plate is correspondingly connected to the first end plate; the second fixing bracket is connected to the second end portion and is connected to the second end plate, so that the second end portion of the liquid cooling plate is correspondingly connected to the second end plate. Based on this, the liquid cooling surface of the liquid cooling plate is correspondingly attached to the battery cells between the first end plate and the second end plate, so that the side surfaces of the battery cells can be cooled, thereby correspondingly solving the high temperature problem during fast charging of the battery cells. And, also based on this, the cooling efficiency and heat dissipation efficiency of the battery module are improved. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0022] Figure 1 Schematic diagram of the battery pack provided by the embodiment of the present utility model;

[0023] Figure 2 Schematic diagram of the battery module provided by the embodiment of the present utility model;

[0024] Figure 3 Another schematic diagram of the battery module provided by the embodiment of the present utility model;

[0025] Figure 4 Another schematic diagram of the battery module provided by the embodiment of the present utility model;

[0026] Figure 5 Schematic diagram of the disassembled battery module provided by the embodiment of the present utility model;

[0027] Figure 6 Provided by the embodiment of the present utility model Figure 5 Enlarged schematic diagram at position A;

[0028] Figure 7 Partial schematic diagram provided by the embodiment of the present utility model;

[0029] Figure 8 Another partial schematic diagram provided by the embodiment of the present utility model;

[0030] Figure 9 Schematic diagram of the connection of the liquid cooling plate provided by the embodiment of the present utility model;

[0031] Figure 10 Another schematic diagram of the connection of the liquid cooling plate provided by the embodiment of the present utility model.

[0032] Icons: 010 - Battery pack; 10 - Battery module; 30 - Upper cover; 50 - Lower box body; 51 - End plate; 53 - Cooling plate; 70 - Electrical components; 100 - Cell group; 110 - First end plate; 130 - Second end plate; 300 - Liquid cooling plate; 310 - First end; 320 - Rivet nut; 330 - Second end; 510 - First fixing bracket; 511 - First plate part; 513 - Second plate part; 530 - Second fixing bracket; 531 - Third plate part; 5311 - Press rivet nut; 533 - Fourth plate part; 550 - Third fixing bracket; 551 - Fifth plate part; 553 - Sixth plate part; 710 - First fixing bolt; 730 - Second fixing bolt. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0035] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0037] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] Embodiment

[0040] Figure 1 The schematic diagram of the battery pack 010 provided by the embodiment of the present utility model. This embodiment provides a battery pack 010, especially for a commercial vehicle battery pack 010. The battery pack 010 includes a battery module 10 and a battery box for accommodating the battery module 10. Correspondingly, the battery pack 010 may also include electrical components 70 connected to the battery box, which will not be elaborated here. It can be understood that in this application, by arranging a liquid cooling plate 300 on the side of the battery cell group 100 in the battery module 10, the cooling efficiency and heat dissipation efficiency can be improved, and the problem of high temperature during fast charging of the battery cells can be solved.

[0041] On the above basis, the battery box includes an upper cover 30 and a lower box body 50, and the bottom wall of the lower box body 50 is a liquid cooling structure. Based on this, when the battery module 10 is placed in the lower box body 50, the lower box body 50 can work together with the liquid cooling plate 300 to cool the bottom surface and side surface of the battery module 10 simultaneously, thereby improving the cooling efficiency.

[0042] In some embodiments, the lower box body 50 includes a cooling plate 53 and end plates 51 connected to both ends of the cooling plate 53. And, glue is applied on the side of the cooling plate 53 in contact with the battery module 10 to achieve the effects of improving the heat dissipation efficiency, ensuring the structural stability, and improving the safety of the battery pack 010. In addition, it should also be noted that the coolant in the cooling plate 53 can communicate with the liquid cooling plate 300 in the battery module 10.

[0043] Next, the specific structures of the various components of the battery module 10 provided by this embodiment and the corresponding relationships between them will be described in detail.

[0044] Figure 2 The schematic diagram of the battery module 10 provided by the embodiment of the present utility model Figure 3Another schematic diagram of the battery module 10 provided by the embodiment of the present utility model, Figure 4 Another schematic diagram of the battery module 10 provided by the embodiment of the present utility model. Please refer to Figures 2 to 4 , this application provides a battery module 10, which includes a battery cell group 100, a liquid cooling plate 300, a first fixing bracket 510, and a second fixing bracket 530.

[0045] Among them, the battery cell group 100 includes a first end plate 110, a second end plate 130, and a plurality of battery cells, and the plurality of battery cells are clamped between the first end plate 110 and the second end plate 130. Correspondingly, considering the stability of the battery cell group 100 after stacking and forming, two steel belts can also be selected to bundle from above and below respectively to improve the overall structural strength of the battery cell group 100 and facilitate subsequent hoisting.

[0046] Correspondingly, to facilitate correspondence with the first end plate 110 and the second end plate 130, the two opposite ends of the liquid cooling plate 300 are defined as a first end portion 310 and a second end portion 330 respectively. It should be noted that the first end portion 310 here can specifically refer to the end of the liquid cooling plate 300 where the manifold is provided, and the second end portion 330 here can specifically refer to the end of the liquid cooling plate where the sealing structure is provided.

[0047] On the above basis, the first fixing bracket 510 is connected to the first end portion 310 and is connected to the first end plate 110, so that the first end portion 310 of the liquid cooling plate 300 is correspondingly connected to the first end plate 110; the second fixing bracket 530 is connected to the second end portion 330 and is connected to the second end plate 130, so that the second end portion 330 of the liquid cooling plate 300 is correspondingly connected to the second end plate 130.

[0048] Based on this, the liquid cooling surface of the liquid cooling plate 300 is correspondingly attached to the battery cells between the first end plate 110 and the second end plate 130, so that the sides of the battery cells can be cooled, thereby correspondingly solving the high-temperature problem during fast charging of the battery cells. And, also based on this, the cooling efficiency and heat dissipation efficiency of the battery module 10 are improved.

[0049] Figure 5 A disassembled schematic diagram of the battery module 10 provided by the embodiment of the present utility model, Figure 6 Provided by the embodiment of the present utility model Figure 5 An enlarged schematic diagram of part A in Figure 5 and Figure 6 , to facilitate the fixed connection between the liquid cooling plate 300 and the first end plate 110 / the second end plate 130, both the first end plate 110 and the second end plate 130 are provided with blind rivet nuts 320.

[0050] Correspondingly, the battery module 10 further includes a second fixing bolt 730, and the second fixing bolt 730 connects the rivet nut 320 to the first fixing bracket 510 or the second fixing bracket 530. Specifically, the rivet nut 320 located at the first end plate 110 is connected to the first fixing bracket 510 through the second fixing bolt 730, and the rivet nut 320 located at the second end plate 130 is connected to the second fixing bracket 530 through the second fixing bolt 730.

[0051] Please refer to Figure 7 , Figure 7 which is a partial schematic diagram provided by an embodiment of the present invention. In some embodiments, the first fixing bracket 510 includes a first plate portion 511 and a second plate portion 513, and the first plate portion 511 and the second plate portion 513 are connected at an angle, that is, the first fixing bracket 510 is in an "L" shape. Among them, the first plate portion 511 is welded to the first end portion 310, and the second plate portion 513 is connected to the first end plate 110.

[0052] It should be noted that based on the above structural settings of the first fixing bracket 510, it can provide a larger connection area on the basis of meeting the connection requirements of being connected to both the first end portion 310 and the first end plate 110 at the same time, thereby providing higher connection strength and stability.

[0053] Correspondingly, the second fixing bracket 530 includes a third plate portion 531 and a fourth plate portion 533, and the third plate portion 531 and the fourth plate portion 533 are connected at an angle, that is, the second fixing bracket 530 is in an "L" shape. Among them, the third plate portion 531 is connected to the second end portion 330, and the fourth plate portion 533 is connected to the second end plate 130. Since the connection features of the second fixing bracket 530 are similar to those described above, they will not be elaborated here.

[0054] Furthermore, a quick connector can be provided in the second fixing bracket 530 to speed up the connection speed. As an optional embodiment, a press rivet nut 5311 is provided on the third plate portion 531, and the battery module 10 further includes a first fixing bolt 710, and the first fixing bolt 710 connects the press rivet nut 5311 to the second end portion 330. It can be understood that based on the above settings of the press rivet nut 5311 and the first fixing bolt 710, it is convenient for the installation and disassembly between the third plate portion 531 and the second end portion 330, thereby facilitating the maintenance and replacement of components.

[0055] In some embodiments, to improve the utilization rate of the liquid cooling plate 300, the number of the battery cell groups 100 is at least two, and the liquid cooling plate 300 can be arranged between two battery cell groups 100. And, when the liquid cooling plate 300 is located between two adjacent battery cell groups 100, such as Figure 8As shown, the battery module 10 further includes a third fixing bracket 550. The third fixing bracket 550 is connected to the second end plate 130 and is sequentially connected to the second end portion 330 and the rivet nut 5311 through a first fixing bolt 710.

[0056] It can be understood that when the liquid cooling plate 300 is located between two adjacent battery cell groups 100, the second fixing bracket 530 and the first fixing bracket 510 are located on opposite sides of the second end portion 330 and are respectively connected to the two second end plates 130 on both sides, so that the liquid cooling plate 300 is fixed to two adjacent battery cell groups 100 at the same time, and the liquid cooling surfaces on both sides are simultaneously attached to the corresponding battery cell groups 100, improving the cooling efficiency of the battery module 10. In addition, it can also be understood that multiple battery cell groups 100 can be connected and fixed through the liquid cooling plate 300, the first fixing bracket 510 and the second fixing bracket 530 to form a larger component, so as to reduce subsequent hoisting steps.

[0057] Please refer to again Figure 8 , the third fixing bracket 550 includes a fifth plate portion 551 and a sixth plate portion 553. The fifth plate portion 551 and the sixth plate portion 553 are connected at an angle, that is, the third fixing bracket 550 is in an "L" shape. The fifth plate portion 551 is provided with a through hole for cooperating with the first fixing bolt 710. The first fixing bolt 710 sequentially passes through the through hole, the second end portion 330 and is fixed to the rivet nut 5311. The sixth plate portion 553 is connected to the second end plate 130. Specifically, it can also be fixed to the rivet nut 320 on the second end plate 130 through a second fixing bolt 730 as described above.

[0058] In addition, when the number of battery cell groups 100 is at least two and the liquid cooling plate 300 is located between two adjacent battery cell groups 100, both sides of the first end portion 310 are connected to the first fixing bracket 510. Based on this, the liquid cooling plate 300 can also be fixed to two adjacent battery cell groups 100 at the same time, and the liquid cooling surfaces are simultaneously attached to the two battery cell groups 100, improving the use efficiency of the liquid cooling plate 300, and it can also connect multiple battery cell groups 100 to form a larger component.

[0059] It should be emphasized that when the liquid cooling plate 300 is located between two adjacent battery cell groups 100, both sides of the first end portion 310 are connected to the first fixing bracket 510. At the same time, both sides of the second end portion 330 are respectively connected to the first fixing bracket 510 and the second fixing bracket 530, so as to ensure the stability of the connection between the liquid cooling plate 300 and two adjacent battery cells.

[0060] Taking the example that the battery module 10 includes three battery cell groups 100, the specific connection process of the battery module 10 is as follows: First, stack the three battery cell groups 100 to form a shape, and divide them into two edge battery cell groups 100 and an intermediate battery cell group 100 located between the two edge battery cell groups 100. Position and install with the intermediate battery cell group 100 as a reference, and paste liquid cooling plates 300 on both sides of the two edge battery cell groups 100.

[0061] For the liquid cooling plate 300 on one side of the edge battery cell group 100, connect the first end 310 of the liquid cooling plate 300 to the first end plate 110 through the first fixing bracket 510, and connect the second end 330 of the liquid cooling plate 300 to the second end plate 130 through the second fixing bracket 530. Correspondingly, a kidney-shaped hole can be provided on the second bracket for dimension adjustment to ensure the reliable installation of the liquid cooling plate 300. For the liquid cooling plate 300 on the other side of the edge battery cell group 100, the above steps are also implemented, which will not be elaborated here.

[0062] After both edge battery cell groups 100 are installed with the liquid cooling plates 300, with the intermediate battery cell group 100 as a reference, stack the two edge battery cell groups 100 on both sides opposite to the intermediate battery cell group 100. Then, use the third fixing bracket 550 and the first fixing bracket 510 to fixedly connect the intermediate battery cell group 100 to the two liquid cooling plates 300 respectively to form a large module, which is convenient for subsequent hoisting the entire battery module 10 into the lower box body 50 through a hoisting tooling. In particular, the staff can perform the hoisting work without waiting for the glue to dry. In addition, it also achieves the effect of improving the strength of the battery module 10.

[0063] It should be noted that as Figure 9 and Figure 10 shown, for the two liquid cooling plates 300 at the edge, that is, the liquid cooling plates 300 on the side of the edge battery cell group 100 away from the intermediate battery cell group 100, only one first fixing bracket 510 and one second fixing bracket 530 are welded. For the two liquid cooling plates 300 in the middle, that is, the liquid cooling plates 300 between the edge battery cell group 100 and the intermediate battery cell group 100, two first fixing brackets 510, one second fixing bracket 530 and one third fixing bracket 550 are welded. In addition, it should also be noted that as Figure 1 shown, the battery pack 010 can also be divided into two front and rear regions, and the two large modules formed above are hoisted into the lower box body 50 as a whole, which will not be elaborated in this application.

[0064] In summary, the present application provides a battery module 10 and a battery pack 010. The battery module 10 includes a battery cell group 100, a liquid cooling plate 300, a first fixing bracket 510, and a second fixing bracket 530. Among them, the battery cell group 100 includes a first end plate 110, a second end plate 130, and a plurality of battery cells, and the plurality of battery cells are clamped between the first end plate 110 and the second end plate 130. Correspondingly, for the convenience of corresponding to the first end plate 110 and the second end plate 130, the two opposite ends of the liquid cooling plate 300 are respectively defined as a first end portion 310 and a second end portion 330. On the above basis, the first fixing bracket 510 is connected to the first end portion 310 and is connected to the first end plate 110, so that the first end portion 310 of the liquid cooling plate 300 is correspondingly connected to the first end plate 110; the second fixing bracket 530 is connected to the second end portion 330 and is connected to the second end plate 130, so that the second end portion 330 of the liquid cooling plate 300 is correspondingly connected to the second end plate 130. Based on this, the liquid cooling surface of the liquid cooling plate 300 is correspondingly attached to the battery cells between the first end plate 110 and the second end plate 130, so that the sides of the battery cells can be cooled, thereby correspondingly solving the high-temperature problem during the fast charging of the battery cells. And, also based on this, the cooling efficiency and heat dissipation efficiency of the battery module 10 are improved.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery module, characterized in that: include: A battery cell group (100), the battery cell group (100) comprising a first end plate (110), a second end plate (130) and a plurality of battery cells, wherein the plurality of battery cells are clamped between the first end plate (110) and the second end plate (130); A liquid cooling plate (300), wherein two opposite ends of the liquid cooling plate (300) are respectively a first end (310) and a second end (330); A first fixed bracket (510) and a second fixed bracket (530), wherein the first fixed bracket (510) is connected to the first end portion (310) and to the first end plate (110); and the second fixed bracket (530) is connected to the second end portion (330) and to the second end plate (130).

2. The battery module according to claim 1, characterized in that: The first fixing bracket (510) comprises a first plate portion (511) and a second plate portion (513), the first plate portion (511) and the second plate portion (513) are connected at an angle, the first plate portion (511) is welded to the first end portion (310), and the second plate portion (513) is connected to the first end plate (110).

3. The battery module according to claim 1, characterized in that: The second fixing bracket (530) comprises a third plate portion (531) and a fourth plate portion (533), wherein the third plate portion (531) and the fourth plate portion (533) are connected at an angle, the third plate portion (531) is connected to the second end portion (330), and the fourth plate portion (533) is connected to the second end plate (130).

4. The battery module according to claim 3, characterized in that: The third plate portion (531) is provided with a rivet nut (5311), and the battery module (10) further includes a first fixing bolt (710), and the first fixing bolt (710) connects the rivet nut (5311) and the second end portion (330).

5. The battery module according to claim 4, characterized in that: The number of the battery cell groups (100) is at least two, and when the liquid cooling plate (300) is located between two adjacent battery cell groups (100), the battery module (10) further includes a third fixing bracket (550), the third fixing bracket (550) being connected to the second end plate (130), and being connected to the second end portion (330) and the rivet nut (5311) in sequence through the first fixing bolt (710).

6. The battery module according to claim 5, characterized in that: The third fixing bracket (550) includes a fifth plate portion (551) and a sixth plate portion (553), wherein the fifth plate portion (551) and the sixth plate portion (553) are connected at an angle, and the fifth plate portion (551) is provided with a through hole that cooperates with the first fixing bolt (710), and the sixth plate portion (553) is connected to the second end plate (130).

7. The battery module according to any one of claims 1 to 6, characterized in that: The first end plate (110) and the second end plate (130) are both provided with a rivet nut (320), and the battery module (10) further includes a second fixing bolt (730), and the second fixing bolt (730) connects the rivet nut (320) and the first fixing bracket (510) or the second fixing bracket (530).

8. The battery module according to any one of claims 1 to 6, characterized in that: The number of the battery cell groups (100) is at least two; when the liquid cooling plate (300) is located between two adjacent battery cell groups (100), the two opposite sides of the first end (310) are connected to the first fixing bracket (510).

9. A battery pack, characterized in that: It comprises the battery module (10) as claimed in any one of claims 1 to 8 and a battery box for accommodating the battery module (10).

10. The battery pack according to claim 9, characterized in that: The battery box comprises an upper cover (30) and a lower box body (50), and the bottom wall of the lower box body (50) is a cooling plate (53).

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