Battery modules, battery packs and vehicles

Abstract

The present invention discloses a battery module, a battery pack and a vehicle. The battery module includes: a cell module, the cell module includes a plurality of cell units, each cell unit has a pole; a bracket, the bracket includes a mounting area and a heat transfer area, the bracket is arranged on one side of the cell module through the mounting area, and each pole extends out of the mounting area respectively; a connecting piece, the connecting piece is arranged in the mounting area of ​​the bracket, and the connecting piece is connected to the pole; the heat transfer area is close to the connecting piece, and the heat transfer area is used to extract the heat at the position of the connecting piece. The battery module of the present invention is provided with a mounting area and a heat transfer area on the bracket, and the mounting area is used to fix the bracket on the cell module, and is also used for the installation and connection of the connecting piece and the bracket. The heat transfer area is used to extract the heat generated by the connecting piece and the pole, realize active heat dissipation of the connecting piece, improve the heat dissipation efficiency at the position of the connecting piece, and meet the requirements of high power and short time fast charging.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle batteries, and more specifically, to a battery module, a battery pack and a vehicle. Background Art

[0002] At present, when the vehicle battery is charging or in other working states, the batteries, connecting plates and other structures in the battery pack will generate a lot of heat, causing the battery temperature to rise and affecting the battery performance and life.

[0003] In the prior art, liquid cooling plates or other heat sinks are usually used to dissipate heat from the battery as a whole, but there is no active heat dissipation design for the heat generated at the connecting plate and pole position in the battery. The connecting plate is naturally cooled only by a small amount of air in the battery pack. The heat dissipation capacity at the connecting plate is limited, and it is difficult to meet the needs of high-power, short-time fast charging. Summary of the invention

[0004] One object of the present invention is to provide a new technical solution for a battery module, which can at least solve the problem that there is no active heat dissipation designed for the connecting piece in the prior art.

[0005] According to a first aspect of the present invention, a battery module is provided, comprising: a cell module, the cell module comprising a plurality of cell units, each of the cell units having a pole; a bracket, the bracket comprising an installation area and a heat transfer area, the bracket being arranged on one side of the cell module through the installation area, and each of the poles extending out of the installation area respectively; a connecting piece, the connecting piece being arranged in the installation area of ​​the bracket and connected to the pole; the heat transfer area being close to the connecting piece, and the heat transfer area being used to export heat at the position of the connecting piece.

[0006] Optionally, the mounting area includes a plurality of through holes arranged in a row along one side of the battery cell module, and the poles extend out of the through holes.

[0007] Optionally, a portion of the bracket located in the heat transfer area forms a heat pipe.

[0008] Optionally, a vacuum is formed in the heat transfer area, and a working fluid is provided in the heat transfer area, the heat transfer area includes: an evaporation section and a condensation section, the evaporation section corresponds to the position of the pole, a flow channel is formed between the condensation section and the evaporation section, the working fluid is heated in the evaporation section, and condensed in the condensation section.

[0009] Optionally, the bracket is a plastic part.

[0010] Optionally, the battery module further includes:

[0011] A protective cover is arranged on the bracket, and the connecting piece is located between the protective cover and the bracket.

[0012] A second aspect of the present invention provides a battery pack, comprising:

[0013] A tray, wherein at least one mounting cavity is provided in the tray;

[0014] At least one battery module as described in the above embodiment, wherein the battery module is arranged in the mounting cavity;

[0015] A first liquid cooling plate, wherein the first liquid cooling plate cover is disposed on the tray, and a heat transfer area of ​​the bracket in the battery module is close to the first liquid cooling plate.

[0016] Optionally, the bottom plate of the tray forms a second liquid cooling plate, and the second liquid cooling plate is arranged opposite to the first liquid cooling plate.

[0017] Optionally, there are multiple battery modules, and both ends of the connecting piece of each battery module are respectively provided with module connectors, and the multiple battery modules are connected by the module connectors.

[0018] A third aspect of the present invention provides a vehicle, comprising the battery module described in the above embodiment.

[0019] The battery module of the present invention is provided with an installation area and a heat transfer area on the bracket. The installation area is used to fix the bracket on the battery module and is also used for the installation and connection of the connecting piece and the bracket. The heat transfer area is used to conduct the heat generated by the connecting piece and the pole, realize active heat dissipation of the connecting piece, improve the heat dissipation efficiency at the position of the connecting piece, prevent the temperature of the connecting piece and the pole from being too high, affect the working efficiency and service life of the battery module, and meet the requirements of high power and short time fast charging.

[0020] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0022] Figure 1 is a structural exploded diagram of a battery module according to an embodiment of the present invention;

[0023] Figure 2 is a cross-sectional view of a bracket of a battery module according to an embodiment of the present invention;

[0024] Figure 3 is another cross-sectional view of a bracket of a battery module according to an embodiment of the present invention;

[0025] Figure 4 is a structural exploded diagram of a battery pack according to an embodiment of the present invention;

[0026] Figure 5 is a side view of a tray of a battery pack according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] Battery module 100;

[0029] Battery cell module 10; Battery cell unit 11; Terminal post 12;

[0030] Bracket 20; mounting area 21; heat transfer area 22; heat pipe 23; through hole 24; evaporation section 25; condensation section 26;

[0031] Connecting piece 30; module connecting piece 31;

[0032] A protective cover 40;

[0033] Aerogel 51; flexible circuit board 52; insulating heat insulation board 53; thermal conductive adhesive 54;

[0034] Battery pack 200;

[0035] Tray 210; second liquid cooling plate 211; power distribution cavity 212; power distribution box 213; installation cavity 214; water inlet 215; water outlet 216;

[0036] The first liquid cooling plate 220 . DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0040] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0041] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] The features referred to in the specification and claims of the present invention as "first" or "second" may include one or more of the features explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the related objects are in an "or" relationship.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" involved 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The battery module 100 according to the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0046] like Figure 1 As shown, the battery module 100 according to the embodiment of the present invention includes a battery cell module 10 , a bracket 20 and a connecting sheet 30 .

[0047] Specifically, the cell module 10 includes a plurality of cell units 11, each of which has a pole 12. The bracket 20 includes a mounting area 21 and a heat transfer area 22. The bracket 20 is disposed on one side of the cell module 10 through the mounting area 21, and each pole 12 extends out of the mounting area 21. The connecting piece 30 is disposed in the mounting area 21 of the bracket 20, and the connecting piece 30 is connected to the pole 12; the heat transfer area 22 is close to the connecting piece 30, and the heat transfer area 22 is used to conduct heat at the position of the connecting piece 30.

[0048] In other words, see Figure 1 According to an embodiment of the present invention, the battery module 100 is mainly composed of a battery cell module 10, a bracket 20 and a connecting sheet 30. Among them, the battery cell module 10 includes a plurality of battery cell units 11, and a plurality of battery cell units 11 are arranged in a row to form a battery cell module 10, and each battery cell unit 11 has a pole 12. Aerogel 51 can be placed between two adjacent battery cell units 11 to achieve heat insulation between the battery cell units 11 and absorb battery cell expansion. The thickness of each aerogel 51 can be 0.5-4mm. Of course, the thickness of the aerogel 51 can be specifically selected according to other parameters of the battery module 100, thermal diffusion requirements, etc.

[0049] like Figure 2 As shown, the bracket 20 includes an installation area 21 and a heat transfer area 22, wherein the bracket 20 can be installed on one side of the battery module 10 through the installation area 21, and the pole 12 in each battery unit 11 can extend out of the installation area 21 respectively. The connecting piece 30 can be installed in the installation area 21 of the bracket 20, and the connecting piece 30 is connected to the pole 12. The bracket 20 is located between the battery module 10 and the connecting piece 30. On the one hand, it can be used to fix the position of the connecting piece 30 to ensure the reliability of the connection between the connecting piece 30 and the pole 12. On the other hand, it can ensure the insulation between the connecting piece 30 and the shell of the battery module 10. The heat transfer area 22 is close to the connecting piece 30, and the heat transfer area 22 can be used to export the heat at the position of the connecting piece 30, so as to realize the active heat dissipation at the pole 12 and the connection position, and ensure that the temperature of the pole 12 and the connecting piece 30 can be controlled within a suitable range, so as to prevent the temperature of the connecting piece 30 and the pole 12 from being too high, affecting the working efficiency and service life of the battery module 100, and meeting the requirements of high power and short time fast charging.

[0050] Therefore, according to the battery module 100 of the embodiment of the present invention, the mounting area 21 and the heat transfer area 22 are set on the bracket 20, and the mounting area 21 is used to fix the bracket 20 on the battery module 10, and is also used for the installation and connection of the connecting piece 30 and the bracket 20. The heat transfer area 22 is used to conduct the heat generated by the connecting piece 30 and the pole 12, realize the active heat dissipation of the connecting piece 30, improve the heat dissipation efficiency at the position of the connecting piece 30, prevent the temperature of the connecting piece 30 and the pole 12 from being too high, affect the working efficiency and service life of the battery module 100, and meet the requirements of high power and short time fast charging.

[0051] According to one embodiment of the present invention, see Figure 2 and Figure 3 The mounting area 21 includes a plurality of through holes 24 arranged in a row along one side of the battery module 10, and each pole 12 extends out of the corresponding through hole 24. The connecting piece 30 is arranged on the bracket 20, and the connecting piece 30 can be connected to each pole 12 respectively. The bracket 20 is located between the battery module 10 and the connecting piece 30. On the one hand, it can be used to fix the position of the connecting piece 30 to ensure the reliability of the connection between the connecting piece 30 and the pole 12. On the other hand, it can ensure the insulation between the connecting piece 30 and the shell of the battery module 10. The connecting piece 30 can be firmly connected to the pole 12 by laser welding or other connection methods, so as to achieve series and parallel connection between the battery units 11.

[0052] According to one embodiment of the present invention, the portion of the bracket 20 located in the heat transfer area 22 forms a heat pipe 23. Figure 2 As shown, the portion of the bracket 20 located in the heat transfer area 22 can form a heat pipe 23. The heat pipe 23 has good thermal conductivity. By designing the heat pipe 23 in the heat transfer area 22 of the bracket 20, the advantage of the high heat exchange capacity of the heat pipe 23 can be applied to the battery module 100, and the heat generated by the connecting plate 30 and the pole 12 can be quickly transferred out, thereby achieving efficient heat dissipation, controlling the temperature at the connecting plate 30, and further improving the heat dissipation efficiency of the battery module 100.

[0053] Of course, the specific shape of the heat pipe 23 and the extension path of the heat pipe 23 can be specifically limited according to the specific shape of the bracket 20, etc., and will not be described in detail in the present invention.

[0054] In some specific embodiments of the present invention, the bracket 20 is a plastic part. A vacuum is formed in the heat transfer area 22, and a working fluid is provided in the heat transfer area 22. The heat transfer area 22 includes: an evaporation section 25 and a condensation section 26. The evaporation section 25 corresponds to the position of the pole 12. The working fluid is heated in the evaporation section 25 and condensed in the condensation section 26.

[0055] In other words, the bracket 20 can be made of plastic with high thermal conductivity or other insulating materials. The bracket 20 is mainly composed of two parts: the installation area 21 and the heat transfer area 22. Among them, the installation area 21 constitutes the structural and functional part of the bracket 20, which is mainly used to realize the functions of bracket 20 installation, connecting piece 30 fixation and insulation protection. The heat transfer area 22 is mainly used for heat conduction at the connecting piece 30. The heat pipe 23 is located in the installation area 21 and can extend to the heat transfer area 22. The heat transfer area 22 can be evacuated first, and then an appropriate amount of working fluid can be filled into the heat transfer area 22. The working fluid can be reasonably selected according to the temperature range that needs to be controlled. The working fluid can be distilled water, ethanol, refrigerant, fluorinated liquid, etc. As Figure 2 and Figure 3 As shown, the heat transfer area 22 is mainly composed of an evaporation section 25 and a condensation section 26, wherein the evaporation section 25 corresponds to the position of the pole 12, and the evaporation section 25 is located near the pole 12, so as to absorb the heat near the connecting piece 30 and the pole 12. A flow channel is formed between the condensation section 26 and the evaporation section 25. The specific shapes of the condensation section 26 and the evaporation section 25 can be specifically set according to the shape of the bracket 20 and the heat dissipation requirements.

[0056] When the battery pack 200 is fast charged at high power, the connecting piece 30 and the pole 12 generate Joule heat to heat the working fluid of the evaporation section 25. Figure 3 The part above the middle dotted line is the condensation section 26, and the part below the dotted line is the evaporation section 25. The working fluid absorbs heat and evaporates. The steam generated by the evaporation of the working fluid flows to the condensation section 26 through the flow channel, and is cooled and condensed in the condensation section 26. Under the action of gravity / capillary force, the condensed liquid returns to the evaporation section 25 through the flow channel to absorb heat. In this way, the heat of the connecting piece 30 and the pole 12 is transferred back and forth, achieving efficient heat dissipation of the connecting piece 30 and the pole 12, preventing the temperature of the connecting piece 30 and the pole 12 from being too high, affecting the working efficiency and service life of the battery module 100, and meeting the requirements of high power and short-time fast charging.

[0057] According to an embodiment of the present invention, the battery module 100 further includes a protective cover 40 , which is disposed on the bracket 20 , and the connecting piece 30 is located between the protective cover 40 and the bracket 20 .

[0058] That is, see Figure 1 The battery module 100 may further include a protective cover 40, which may be mounted on the bracket 20, and the connecting piece 30 is located between the protective cover 40 and the bracket 20. The protective cover 40 may protect and insulate the connecting piece 30 and the battery cell unit 11.

[0059] Of course, the battery module 100 may also include a flexible circuit board 52 (FPC), an insulating heat-insulating board 53, a thermally conductive adhesive 54 and other structures, wherein the flexible circuit board 52 can be used to monitor the voltage and temperature of the battery module 100, and can communicate with the BMS (Battery Management System) of the battery pack 200 through the flexible circuit board 52. The insulating heat-insulating board 53 can be arranged between the battery module 100 and the expansion beam of the tray 210 of the battery pack 200 to play a role in heat insulation and insulation. Of course, for those skilled in the art, other structures of the battery module 100 and its working principle are understandable and achievable, and will not be described in detail in the present invention.

[0060] In summary, according to the battery module 100 of the embodiment of the present invention, the mounting area 21 and the heat transfer area 22 are set on the bracket 20, and the mounting area 21 is used to fix the bracket 20 on the battery module 10, and is also used for the installation and connection of the connecting piece 30 and the bracket 20. The heat transfer area 22 is used to conduct the heat generated by the connecting piece 30 and the pole 12, realize the active heat dissipation of the connecting piece 30, improve the heat dissipation efficiency at the position of the connecting piece 30, prevent the temperature of the connecting piece 30 and the pole 12 from being too high, affect the working efficiency and service life of the battery module 100, and meet the requirements of high power and short time fast charging.

[0061] According to a second aspect of the present invention, Figure 4 As shown, a battery pack 200 is provided, including a tray 210 , at least one battery module 100 and a first liquid cooling plate 220 .

[0062] Specifically, at least one mounting cavity 214 is provided in the tray 210, and at least one battery module 100 in the above embodiment is disposed in the mounting cavity 214. The first liquid cooling plate 220 is covered on the tray 210, and the heat transfer area 22 of the bracket 20 in the battery module 100 is close to the first liquid cooling plate 220.

[0063] In other words, see Figure 4The battery pack 200 according to the embodiment of the present invention is mainly composed of a tray 210, at least one battery module 100 and a first liquid cooling plate 220. Among them, at least one mounting cavity 214 is provided in the tray 210, and the number of the battery modules 100 in at least one of the above embodiments corresponds to the number of the mounting cavities 214, and the battery modules 100 are installed in the mounting cavities 214, wherein the protective cover 40 in the battery module 100 can be connected to the tray 210. The first liquid cooling plate 220 can be covered on the tray 210, and the heat transfer area 22 of the bracket 20 in the battery module 100 can be close to the first liquid cooling plate 220. The heat transfer area 22 of the bracket 20 is designed as a heat pipe 23. The heat pipe 23 has good thermal conductivity. By setting the heat pipe 23, the advantage of the high heat exchange capacity of the heat pipe 23 can be applied to the battery module 100, and the heat generated by the connecting plate 30 and the pole 12 can be quickly transferred out to achieve efficient heat dissipation, control the temperature at the connecting plate 30, and further improve the heat dissipation efficiency of the battery module 100.

[0064] When the battery pack 200 is fast charged at high power, the connecting piece 30 and the pole 12 generate Joule heat, heating the working fluid in the evaporation section 25, and the working fluid absorbs heat and evaporates. The vapor generated by the evaporation of the working fluid flows through the flow channel to the condensation section 26, where it is cooled and condensed. Under the action of gravity / capillary force, the condensed liquid returns to the evaporation section 25 through the flow channel to absorb heat. In this way, the heat of the connecting piece 30 and the pole 12 is transferred to the first liquid cooling plate 220 back and forth, achieving active heat dissipation of the connecting piece 30 and the pole 12, preventing the temperature of the connecting piece 30 and the pole 12 from being too high, affecting the working efficiency and service life of the battery module 100, and meeting the requirements of high power and short-time fast charging.

[0065] Therefore, according to the battery pack 200 of the embodiment of the present invention, the mounting area 21 and the heat transfer area 22 are set on the bracket 20, and the mounting area 21 is used to fix the bracket 20 on the battery module 10, and is also used for the installation and connection of the connecting piece 30 and the bracket 20. The heat transfer area 22 is used to conduct the heat generated by the connecting piece 30 and the pole 12, realize the active heat dissipation of the connecting piece 30, improve the heat dissipation efficiency at the position of the connecting piece 30, prevent the temperature of the connecting piece 30 and the pole 12 from being too high, affect the working efficiency and service life of the battery module 100, and meet the requirements of high power and short time fast charging.

[0066] According to an embodiment of the present invention, the bottom plate of the tray 210 forms a second liquid cooling plate 211 , and the second liquid cooling plate 211 is disposed opposite to the first liquid cooling plate 220 .

[0067] That is to say, the second liquid cooling plate 211 can be directly integrated as the bottom plate of the tray 210, and the first liquid cooling plate 220 can be used as a sealing cover of the battery pack 200 to enhance the heat dissipation capacity of the entire pack, thereby improving the fast charging capacity of the entire pack. The second liquid cooling plate 211 is arranged opposite to the first liquid cooling plate 220. Of course, the second liquid cooling plate 211 can also be arranged separately at the bottom of the tray 210. Figure 5 As shown, the tray 210 may be provided with a water inlet 215 and a water outlet 216 communicating with the internal pipeline of the first liquid cooling plate 220. The tray 210 may also be provided with a water inlet 215 and a water outlet 216 communicating with the internal pipeline of the second liquid cooling plate 211.

[0068] The tray 210 is a circular frame mainly formed by welding extruded profiles, and the bottom plate of the tray 210 can adopt a second liquid cooling plate 211. The second liquid cooling plate 211 and the tray 210 can be connected together by stir friction welding, or by using a sealing ring plus mechanical fastening (rivets, bolts) or the like, or by gluing them together. A distribution cavity 212 is provided on one side of the tray 210, and a distribution box 213 and other structures are provided in the distribution cavity 212. A guard plate can also be provided at the bottom of the battery pack 200, and the guard plate can be fixed to the bottom of the tray 210 by rivets or screws, etc., so as to protect the battery pack 200.

[0069] According to one embodiment of the present invention, there are multiple battery modules 100, and module connectors 31 are respectively provided at both ends of the connecting sheet 30 of each battery module 100, and multiple battery modules 100 are connected through the module connectors 31. The battery module 100 can be fixed to the mounting cavity 214 of the tray 210 through the thermal conductive adhesive 54, and the first liquid cooling plate 220 can also be bonded and fixed to the battery module 100 through the thermal conductive adhesive 54. The battery modules 100 can be connected in series and parallel with each other through the module connectors 31 on the connecting sheet 30.

[0070] Of course, for those skilled in the art, other structures and working principles of the battery pack 200 are understandable and achievable, and will not be described in detail in the present invention.

[0071] According to a third aspect of the present invention, a vehicle is provided, comprising the battery module 100 in the above embodiment. Since the battery module 100 according to the embodiment of the present invention has the above technical effects, the vehicle according to the embodiment of the present invention should also have corresponding technical effects, that is, the vehicle of the present invention can achieve active heat dissipation of the connecting sheet 30 by adopting the battery module 100, thereby improving the working efficiency and service life of the battery of the whole vehicle.

[0072] Of course, for those skilled in the art, other structures of the vehicle and their working principles are understandable and achievable, and will not be described in detail in the present invention.

[0073] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery module, characterized in that: include: A battery cell module, wherein the battery cell module comprises a plurality of battery cell units, each of which has a pole; A bracket, the bracket comprising a mounting area and a heat transfer area, the bracket is arranged on one side of the battery module through the mounting area, and each of the poles extends out of the mounting area respectively; A connecting piece, the connecting piece is arranged in the mounting area of ​​the bracket and connected to the pole; The heat transfer area is close to the connecting piece, and the heat transfer area is used to conduct heat at the position of the connecting piece; A vacuum is formed in the heat transfer area, and a working fluid is provided in the heat transfer area. The heat transfer area includes an evaporation section and a condensation section. The evaporation section corresponds to the position of the pole, a flow channel is formed between the condensation section and the evaporation section, and the working fluid is heated in the evaporation section and condensed in the condensation section.

2. The battery module according to claim 1, characterized in that: The mounting area includes a plurality of through holes arranged in a row along one side of the battery cell module, and the poles extend out of the through holes.

3. The battery module according to claim 1, characterized in that: The portion of the bracket located in the heat transfer area forms a heat pipe.

4. The battery module according to claim 1, characterized in that: The bracket is a plastic part.

5. The battery module according to claim 1, characterized in that: Also includes: A protective cover is arranged on the bracket, and the connecting piece is located between the protective cover and the bracket.

6. A battery pack, characterized in that: include: A tray, wherein at least one mounting cavity is provided in the tray; at least one battery module according to any one of claims 1 to 5, wherein the battery module is arranged in the mounting cavity; A first liquid cooling plate, wherein the first liquid cooling plate cover is disposed on the tray, and a heat transfer area of ​​the bracket in the battery module is close to the first liquid cooling plate.

7. The battery pack according to claim 6, characterized in that: The bottom plate of the tray forms a second liquid cooling plate, and the second liquid cooling plate is arranged opposite to the first liquid cooling plate.

8. The battery pack according to claim 6, characterized in that: There are multiple battery modules, and both ends of the connecting piece of each battery module are respectively provided with module connectors, and the multiple battery modules are connected by the module connectors.

9. A vehicle, characterized in that: A battery module comprising any one of claims 1 to 5.

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