Battery pack and electric vehicle

Abstract

The utility model provides a battery pack and an electric vehicle, and the battery pack comprises a cooling assembly which is provided with a first accommodating cavity and a second accommodating cavity which are arranged at an interval along a first direction, the first accommodating cavity is used for accommodating a heat dissipation medium to form a cooling part, and the second accommodating cavity is used for accommodating a non-Newtonian fluid to form a supporting part; the battery module is opposite to and connected with the cooling assembly in the first direction, the first containing cavity is located between the second containing cavity and the battery module, the supporting part is used for supporting the cooling part and the battery module, and the first direction is the thickness direction of the battery module. The cooling assembly of the battery pack integrates three functions of cooling, supporting and buffering, the space occupied by an independent cooling system, a buffering material and a physical supporting piece in a traditional scheme is remarkably reduced, the overall size of the battery pack in the first direction is effectively reduced, and the space utilization rate of an electric vehicle is increased.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a battery pack and an electric vehicle. Background Art

[0002] As a key energy storage unit of electric vehicles, the battery pack is responsible for storing the electrical energy input from an external power source (such as a charging station) and supplying power when the vehicle is running. The battery modules inside the battery pack will generate heat during the charging and discharging process. In order to ensure the safety of the battery modules, maintain their long-term stable operation and extend their service life, the battery modules need to be cooled.

[0003] The existing battery includes: an upper cover, a battery module, a cold plate, a buffer part, and a box body constituting the main body of the package. The insulating part, the cold plate, and the battery module are stacked in sequence inside the box body. The upper cover is sealed and connected to the top of the box body to ensure that each component is effectively isolated from the external environment. Among them, the cold plate is used to conduct heat generated by the battery module, and the buffer part can enhance the protection of the cold plate and the battery module.

[0004] However, this stacked design makes the battery pack larger in size, which is not conducive to the miniaturization of the battery pack and affects the space utilization of the electric vehicle. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a battery pack and an electric vehicle to solve the technical problem that the existing battery pack is large in size and affects the space utilization of the electric vehicle.

[0006] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] A first aspect of the present application provides a battery pack, comprising:

[0008] The cooling assembly comprises a first accommodating cavity and a second accommodating cavity spaced apart along a first direction, the first accommodating cavity being used to accommodate a heat dissipation medium to form a cooling portion, and the second accommodating cavity being used to accommodate a non-Newtonian fluid to form a supporting portion;

[0009] The battery module is opposite to and connected to the cooling assembly along a first direction. The first accommodating cavity is located between the second accommodating cavity and the battery module. The supporting portion is used to support the cooling portion and the battery module. The first direction is the thickness direction of the battery module.

[0010] In some modified implementations of the first aspect of the present application, the cooling assembly includes:

[0011] A plate-shaped housing having a receiving space;

[0012] The partition is arranged in the accommodation space, and all the peripheral sides of the partition are sealed and connected to the inner wall of the shell so that the accommodation space forms a first accommodation cavity and a second accommodation cavity.

[0013] In some embodiments, the cooling assembly further comprises:

[0014] The support plate is arranged in the accommodating space, the support plate is located on one side of the partition along the second direction, and the entire circumference of the support plate is sealed and connected to the inner wall of the shell; the partition is sealed and connected to the first surface of the support plate on one side along the second direction, and the second direction is the width direction of the battery module.

[0015] In some embodiments, the second surface of the support plate and the inner wall of the housing are spaced apart to form a third accommodating cavity, and the third accommodating cavity is used to accommodate the heat dissipation medium or the non-Newtonian fluid.

[0016] In some embodiments, the third accommodating cavity is used to accommodate the heat dissipation medium, the support plate is provided with a first through hole along the second direction, and the third accommodating cavity is connected with the first accommodating cavity through the first through hole; or,

[0017] The third accommodating chamber is used to accommodate the non-Newtonian fluid. The support plate is provided with a second through hole along the second direction. The third accommodating chamber is communicated with the second accommodating chamber through the second through hole.

[0018] In some embodiments, the cooling assembly further comprises:

[0019] Multiple baffles are all arranged in the first accommodating cavity, the multiple baffles are connected to the inner wall of the shell, and the multiple baffles are arranged in parallel and at intervals along the second direction to form multiple flow channels; the multiple flow channels are connected to each other or not connected, and the multiple flow channels are used to accommodate heat dissipation media.

[0020] In some embodiments, the cooling assembly has a fourth accommodating chamber, the second accommodating chamber is disposed between the fourth accommodating chamber and the first accommodating chamber, and the fourth accommodating chamber is used to accommodate a heat dissipation medium or a non-Newtonian fluid.

[0021] In some embodiments, it also includes:

[0022] The enclosure structure is sealed and connected with the cooling assembly to form a receiving space. The positive projection of the second receiving cavity along the first direction completely covers the receiving space. The battery module is arranged in the receiving space.

[0023] A second aspect of the present application provides an electric vehicle, comprising:

[0024] The first aspect is the battery pack.

[0025] In some modified implementations of the second aspect of the present application, the following also includes:

[0026] The cooling system, the first accommodating cavity of the cooling assembly of the battery pack is connected to the cooling system to circulate the heat dissipation medium.

[0027] Compared with the prior art, the battery pack provided in the first aspect of the present application has a first accommodating chamber and a second accommodating chamber spaced apart along a first direction in the cooling assembly. The first accommodating chamber accommodates a heat dissipation medium to form a cooling portion that directly cools the battery module, and the second accommodating chamber accommodates a non-Newtonian fluid to form a supporting portion for supporting the cooling portion and the battery module. In addition, due to the special rheological properties of the non-Newtonian fluid, the supporting portion also has good buffering performance, which can provide good protection for the cooling portion and the battery module, and reduce potential damage caused by vibration, impact, etc. The cooling assembly of the battery pack of the present application integrates the three functions of cooling, support, and buffering, significantly reducing the space occupied by the independent cooling system, buffering materials, and physical support members in the traditional solution, effectively reducing the overall size of the battery pack along the first direction, and improving the space utilization of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0029] Figure 1 A schematic structural diagram of an embodiment of a cold plate assembly of a battery pack of the present application is schematically shown;

[0030] Figure 2 A schematic structural diagram of another embodiment of a cold plate assembly of a battery pack of the present application is schematically shown;

[0031] Figure 3 A partial cross-sectional view of a cold plate assembly and an enclosure structure of the battery pack of the present application is schematically shown.

[0032] Description of Figure Numbers:

[0033] 1. Cooling assembly; 11. First accommodating chamber; 12. Second accommodating chamber; 13. Shell; 14. Partition; 15. Support plate; 16. Third accommodating chamber; 17. Baffle; 18. Fourth accommodating chamber; 2. Enclosure structure. DETAILED DESCRIPTION

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0036] The battery module in the battery pack is composed of multiple battery cells. The battery cells will generate heat during the charging and discharging process. When the temperature of the battery cells is too high, it will affect its service life and even cause safety problems. Therefore, the battery module needs to be cooled to ensure the service life and safety of each battery cell in the battery module.

[0037] The existing battery module is cooled by a cold plate, in which multiple channels are arranged at intervals along the width direction of the battery module, and coolant is passed through the multiple channels to cool the battery module. During the assembly process, a buffer part needs to be arranged between the cold plate and the bottom of the box body. The buffer part can be a plastic gasket to achieve buffering between the cold plate and the bottom of the box body, so as to prevent the cold plate from breaking due to bumps on the vehicle under bad road conditions, causing coolant to flow out, and causing problems such as short circuit of the battery module.

[0038] With the development of electric vehicle technology, higher requirements are being placed on the integration of battery packs. The inventors have noticed that the stacking of buffers and cold plates at the bottom of the box body will result in a larger battery pack size, affecting the layout and integration of the entire vehicle.

[0039] The cooling assembly 1 of the battery pack of the present application significantly reduces the space occupied by independent cooling systems, buffer materials and physical support parts in traditional solutions by integrating the three functions of cooling, support and buffering, effectively reduces the size of the battery pack and improves the space utilization of the electric vehicle.

[0040] Example 1

[0041] like Figure 1 and Figure 2 As shown, Embodiment 1 of the present application provides a battery pack, comprising:

[0042] The cooling assembly 1 comprises a first accommodating cavity 11 and a second accommodating cavity 12 arranged at intervals along a first direction, the first accommodating cavity 11 is used to accommodate a heat dissipation medium to form a cooling portion, and the second accommodating cavity 12 is used to accommodate a non-Newtonian fluid to form a supporting portion;

[0043] The battery module (not shown) is opposite to and connected to the cooling assembly 1 along a first direction. The first accommodating cavity 11 is located between the second accommodating cavity 12 and the battery module. The supporting portion is used to support the cooling portion and the battery module. The first direction is the thickness direction of the battery module.

[0044] Specifically, the cooling component 1 integrates the functions of cooling, supporting and buffering. The cooling component 1 is provided with a first inlet and a second inlet (not shown in the figure) at intervals, the first accommodating chamber 11 and the second accommodating chamber 12 are independent of each other, the first inlet is connected to the first accommodating chamber 11, and the heat dissipation medium is input into the first accommodating chamber 11 through the first inlet; the second inlet is connected to the second accommodating chamber 12, and the non-Newtonian fluid is filled into the second accommodating chamber 12 through the second inlet. During the filling process, it is necessary to ensure that the non-Newtonian fluid fills the entire second accommodating chamber 12 without bubbles or impurities, so as to achieve the best support effect and rheological response.

[0045] The orthographic projection of the first accommodating cavity 11 along the first direction can completely cover the battery module to enhance the cooling effect. The specific size of the first accommodating cavity 11 can be designed according to the size of the battery module, and the shape of the first accommodating cavity 11 can be designed according to actual needs. In order to ensure the buffering and supporting effect of the supporting part on the cooling part, the orthographic projection of the second accommodating cavity 12 along the first direction can completely cover the first accommodating cavity 11. The specific size of the second accommodating cavity 12 can be designed according to the size of the first accommodating cavity 11, and the shape of the second accommodating cavity 12 can be designed according to actual needs.

[0046] The heat dissipation medium may be a liquid coolant, such as a water-based coolant or a synthetic coolant, or a gas medium, such as air, etc. The non-Newtonian fluid may be a shear thickening fluid or a bio-based non-Newtonian fluid, etc.

[0047] The battery module is responsible for storing the electric energy input from the external power source, and outputting the electric energy continuously and stably from the power system during the operation of the vehicle to provide power for the electric vehicle. The battery module can be firmly connected to the cooling assembly 1 by means of locking parts, such as bolts, buckles or adhesives. The support part is away from the battery module relative to the cooling part, and the cooling part can directly cool the battery module. The non-Newtonian fluid has good fluidity when it is not impacted by external forces. It can flow in the second accommodating cavity 12 and transfer the heat generated by the battery pack in the form of convection or heat conduction; but when the non-Newtonian fluid is impacted by force, it will become relatively solid, absorb part of the impact energy, and produce a certain impact resistance, thereby achieving the protection of other components, reducing the deformation and rupture of the cold plate assembly and causing the heat dissipation medium in the first accommodating cavity 11 to flow out, and improving the overall safety of the battery pack, especially when there are obstacles, protrusions, steps, etc. on the road to cause the vehicle to bottom out, and when foreign objects may penetrate the battery pack, there is a good expected effect.

[0048] The battery pack provided in Example 1 of the present application is provided with a first accommodating chamber 11 and a second accommodating chamber 12 spaced apart along a first direction in a cooling assembly 1. The first accommodating chamber 11 accommodates a heat dissipation medium to form a cooling portion that directly cools the battery module, and the second accommodating chamber accommodates a non-Newtonian fluid to form a supporting portion for supporting the cooling portion and the battery module. In addition, due to the special rheological properties of the non-Newtonian fluid, the supporting portion also has good buffering performance, which can provide good protection for the cooling portion and the battery module, and reduce potential damage caused by vibration, impact, etc. The cooling assembly 1 of the present application integrates the three functions of cooling, support, and buffering, significantly reducing the space occupied by the independent cooling system, buffering materials, and physical support members in the traditional solution, effectively reducing the overall size of the battery pack along the first direction, and improving the space utilization of the electric vehicle.

[0049] like Figure 1 and Figure 2 As shown, in some embodiments, the cooling assembly 1 includes:

[0050] A plate-shaped housing 13 having a receiving space;

[0051] The partition 14 is disposed in the accommodation space, and all circumferential sides of the partition 14 are sealed and connected to the inner wall of the shell 13 so that the accommodation space forms a first accommodation chamber 11 and a second accommodation chamber 12 .

[0052] Specifically, the housing 13 needs to have a certain mechanical strength and thermal conductivity, for example, it can be made of aluminum alloy or stainless steel. The housing 13 and the partition 14 can be perpendicular to the first direction, so that the support part and the cooling part are both plate-shaped structures, making the overall layout more compact and reducing the size of the battery pack in the first direction.

[0053] The partition 14 can be made of aluminum alloy or stainless steel, and can be integrally formed with the housing 13, or the partition 14 can be welded or bonded to the housing 13 to achieve a sealed connection to form two independent chambers.

[0054] like Figure 1 and Figure 2 As shown, in some embodiments, the cooling assembly 1 further includes:

[0055] The support plate 15 is arranged in the accommodating space. The support plate 15 is located on one side of the partition 14 along the second direction. The entire circumference of the support plate 15 is sealed and connected to the inner wall of the outer shell 13. The partition 14 is sealed and connected to the first surface of the support plate 15 on one side along the second direction. The second direction is the width direction of the battery module.

[0056] Specifically, the support plate 15 is used to enhance the supporting effect and enhance the structural stability of the battery pack in the first direction. The material of the support plate 15 can refer to the material of the partition 14. The support plate 15 can be perpendicular to the partition, or the support plate 15 can form an acute angle or an obtuse angle with the partition 14. The support plate 15 can be integrally formed with the outer shell 13 and the partition 14; or the support plate 15 can be welded with the outer shell 13 and the partition 14; or the support plate 15 can be bonded with the outer shell 13 and the partition 14.

[0057] The number of the support plates 15 may be one or two. When there are two support plates 15, the two support plates 15 may be respectively disposed on both sides of the partition 14 along the second direction, all circumferential sides of the two support plates 15 are sealed and connected to the inner wall of the housing 13, and both sides of the partition 14 along the second direction are sealed and connected to the first surface of one support plate 15, wherein the first surface of the support plate 15 is the surface close to the partition 14 along the second direction.

[0058] like Figure 1 and Figure 2 As shown, in some embodiments, the second surface of the support plate 15 and the inner wall of the housing 13 are spaced apart to form a third accommodating cavity 16, and the third accommodating cavity 16 is used to accommodate a heat dissipation medium or a non-Newtonian fluid.

[0059] Specifically, when the third accommodating chamber 16 accommodates the heat dissipation medium, the third accommodating chamber 16 and the first accommodating chamber 11 may be independent of each other or may be connected; the third accommodating chamber 16 and the second accommodating chamber 12 are independent of each other.

[0060] When the third accommodating chamber 16 accommodates a non-Newtonian fluid, the third accommodating chamber 16 and the second accommodating chamber 12 may be independent of each other or may be connected; the third accommodating chamber 16 and the first accommodating chamber 11 are independent of each other.

[0061] When there are two support plates 15 , the second surfaces of the two support plates 15 can be spaced apart from the inner wall of the housing 13 to form two third accommodating cavities 16 , and the substances contained in the two third accommodating cavities 16 can be the same or different.

[0062] To enhance thermal management flexibility, such as Figure 1 and Figure 2 As shown, in some embodiments, the third accommodating cavity 16 is used to accommodate the heat dissipation medium, the support plate 15 is provided with a first through hole along the second direction, and the third accommodating cavity 16 is connected with the first accommodating cavity 11 through the first through hole to form an additional heat dissipation path, increase the flow area and contact area of ​​the heat dissipation medium, help to more efficiently absorb and transfer the heat generated by the battery module, and improve the cooling effect; or,

[0063] The third accommodating chamber 16 is used to accommodate the non-Newtonian fluid. The support plate 15 is provided with a second through hole along the second direction. The third accommodating chamber 16 is connected with the second accommodating chamber 12 through the second through hole, which increases the total volume of the non-Newtonian fluid and may enhance its supporting and buffering properties. In addition, the flow of the non-Newtonian fluid between the third accommodating chamber 16 and the second accommodating chamber 12 helps to distribute the supporting force more evenly, further improving the structural stability of the battery pack.

[0064] like Figure 1 and Figure 2 As shown, in some embodiments, the cooling assembly 1 further includes:

[0065] Multiple baffles 17 are all arranged in the first accommodating cavity 11, and the multiple baffles 17 are connected to the inner wall of the shell 13. The multiple baffles 17 are arranged in parallel and at intervals along the second direction to form multiple flow channels; the multiple flow channels are connected to each other or not connected, and the multiple flow channels are used to accommodate heat dissipation media.

[0066] Specifically, the plurality of flow channels can effectively guide the flow path of the heat dissipation medium in the first accommodating cavity 11, thereby ensuring that the heat dissipation medium can be more evenly distributed and improving the heat exchange efficiency.

[0067] The peripheral sides of the multiple baffles 17 can be sealed and connected to the inner wall of the shell 13 to form multiple independent flow channels. The specific connection method can refer to the connection method between the support plate 15 and the inner wall of the shell 13. Different heat dissipation media can be introduced into each flow channel according to the heat source distribution of the battery module to achieve refined control of thermal management. In this case, the cooling component 1 is provided with multiple first inlets, each of which is connected to a flow channel; or, the multiple flow channels are connected to each other, and the same heat dissipation medium is introduced into the multiple flow channels. In this case, the cooling component 1 can be provided with a first inlet to improve the efficiency of the heat dissipation medium.

[0068] like Figure 2 As shown, in some embodiments, the cooling assembly 1 has a fourth accommodating chamber 18, the second accommodating chamber 12 is disposed between the fourth accommodating chamber 18 and the first accommodating chamber 11, and the fourth accommodating chamber 18 is used to accommodate a heat dissipation medium or a non-Newtonian fluid.

[0069] Specifically, there can be two partitions 14, both of which are arranged in the accommodating space, and the two partitions 14 are spaced apart along the first direction, and all the circumferential sides of the two partitions 14 are sealed and connected to the inner wall of the outer shell 13, so that the accommodating space forms a first accommodating chamber 11, a second accommodating chamber 12 and a fourth accommodating chamber 18.

[0070] When the fourth accommodating chamber 18 is used to accommodate a heat dissipation medium, it can serve as an additional cooling channel to further enhance the cooling effect on the battery module. The fourth accommodating chamber 18 is independent of the second accommodating chamber 12. When the third accommodating chamber 16 accommodates a heat dissipation medium, the fourth accommodating chamber 18 can be independent of the third accommodating chamber 16 or communicate with each other; when the third accommodating chamber 16 accommodates a non-Newtonian fluid, the fourth accommodating chamber 18 is independent of the third accommodating chamber 16.

[0071] When the fourth accommodating chamber 18 is used to accommodate a non-Newtonian fluid, it can serve as a supplement and extension of the support portion to enhance the buffering and supporting effects on the battery module and the cooling portion. The fourth accommodating chamber 18 can be independent of or connected to the second accommodating chamber 12. When the third accommodating chamber 16 accommodates a heat dissipation medium, the fourth accommodating chamber 18 is independent of the third accommodating chamber 16; when the third accommodating chamber 16 accommodates a non-Newtonian fluid, the fourth accommodating chamber 18 is independent of or connected to the third accommodating chamber 16.

[0072] like Figure 3 As shown, in some embodiments, it also includes:

[0073] The enclosure structure 2 is sealed and connected with the cooling assembly 1 to form a receiving space. The orthographic projection of the second receiving cavity 12 along the first direction completely covers the receiving space. The battery module is arranged in the receiving space.

[0074] Specifically, the orthographic projection of the second accommodating cavity 12 along the first direction completely covers the accommodating space, so that the support portion can fully support the battery module in the thickness direction, making full use of the longitudinal space of the battery pack, enhancing the supporting effect, reducing unnecessary gaps, and improving space utilization efficiency.

[0075] The enclosure structure 2 can be set on the first end face of the cooling component 1 along the first direction. The cooling component 1 can be sealed and connected to the enclosure structure 2 by gluing or integral molding. The battery pack also includes a cover body. The cover body and the cooling component 1 are spaced apart along the first direction. The cover body is sealed and connected to the enclosure structure to form a sealed accommodating space, which enhances protection against external environmental pollutants (such as moisture and dust), helps protect the battery module from mechanical damage and environmental erosion, and prolongs battery life.

[0076] Example 2

[0077] Embodiment 2 of the present application provides an electric vehicle, comprising:

[0078] The battery pack of Example 1.

[0079] Specifically, the electric vehicle may be an electric car, an electric bus, an electric truck, and the like.

[0080] The electric vehicle provided in Example 2 of the present application includes the battery pack provided in Example 1, and the first accommodating chamber 11 and the second accommodating chamber 12 are arranged in a first direction in the cooling assembly 1, the first accommodating chamber 11 accommodates the heat dissipation medium to form a cooling part that directly cools the battery module, and the second accommodating chamber accommodates the non-Newtonian fluid to form a supporting part for supporting the cooling part and the battery module. In addition, due to the special rheological properties of the non-Newtonian fluid, the supporting part also has good buffering performance, which can play a good protective role for the cooling part and the battery module, and reduce potential damage caused by vibration, impact, etc. The cooling assembly 1 of the present application integrates the three functions of cooling, support and buffering, significantly reducing the space occupied by the independent cooling system, buffering materials and physical support members in the traditional solution, effectively reducing the overall size of the battery pack along the first direction, and improving the space utilization of the electric vehicle.

[0081] In some embodiments, it also includes:

[0082] A cooling system (not shown in the figure), the first accommodating cavity 11 of the cooling assembly 1 of the battery pack is connected to the cooling system to circulate the heat dissipation medium.

[0083] Specifically, the cooling assembly 1 may further include an outlet (not shown in the figure), which is connected to the first accommodating chamber 11. The outlet and the first inlet are respectively connected to the cooling system through pipelines, and the pipelines are sealed to the battery pack. The heat dissipation medium circulates inside the battery pack and the external cooling system to ensure that the heat dissipation medium can continuously absorb the heat generated by the battery module and transfer it to the external cooling system for heat dissipation, and then flow back to the battery pack to form an effective heat transfer cycle.

[0084] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery pack, characterized in that: include: A cooling assembly (1) comprises a first accommodating cavity (11) and a second accommodating cavity (12) arranged at intervals along a first direction, wherein the first accommodating cavity (11) is used to accommodate a heat dissipation medium to form a cooling portion, and the second accommodating cavity (12) is used to accommodate a non-Newtonian fluid to form a supporting portion; A battery module is opposite to and connected to the cooling assembly (1) along the first direction, the first accommodating cavity (11) is located between the second accommodating cavity (12) and the battery module, the supporting portion is used to support the cooling portion and the battery module, and the first direction is the thickness direction of the battery module.

2. The battery pack according to claim 1, characterized in that: The cooling assembly (1) comprises: A plate-shaped housing (13) having a receiving space; A partition (14) is arranged in the accommodating space, and all circumferential sides of the partition (14) are sealedly connected to the inner wall of the outer shell (13) so that the accommodating space forms the first accommodating cavity (11) and the second accommodating cavity (12).

3. The battery pack according to claim 2, characterized in that: The cooling assembly (1) further comprises: A support plate (15) is arranged in the accommodating space, the support plate (15) is located on one side of the partition plate (14) along the second direction, and the entire circumference of the support plate (15) is sealed to the inner wall of the outer shell (13); the partition plate (14) is sealed to the first surface of the support plate (15) on one side along the second direction, and the second direction is the width direction of the battery module.

4. The battery pack according to claim 3, characterized in that: The second surface of the support plate (15) and the inner wall of the housing (13) are spaced apart to form a third accommodating cavity (16), and the third accommodating cavity (16) is used to accommodate a heat dissipation medium or a non-Newtonian fluid.

5. The battery pack according to claim 4, characterized in that: The third accommodating cavity (16) is used to accommodate a heat dissipation medium, the support plate (15) is provided with a first through hole along the second direction, and the third accommodating cavity (16) is connected with the first accommodating cavity (11) through the first through hole; or, The third accommodating chamber (16) is used to accommodate a non-Newtonian fluid, the support plate (15) is provided with a second through hole along the second direction, and the third accommodating chamber (16) is connected to the second accommodating chamber (12) through the second through hole.

6. The battery pack according to claim 3, characterized in that: The cooling assembly (1) further comprises: A plurality of baffles (17) are arranged in the first accommodating cavity (11); the plurality of baffles (17) are connected to the inner wall of the outer shell (13); the plurality of baffles (17) are arranged in parallel and at intervals along the second direction to form a plurality of flow channels; the plurality of flow channels are connected to each other or not connected; and the plurality of flow channels are used to accommodate heat dissipation media.

7. The battery pack according to claim 1, characterized in that: The cooling assembly (1) has a fourth accommodating chamber (18), the second accommodating chamber (12) is arranged between the fourth accommodating chamber (18) and the first accommodating chamber (11), and the fourth accommodating chamber (18) is used to accommodate a heat dissipation medium or a non-Newtonian fluid.

8. The battery pack according to claim 1, characterized in that: Also includes: The enclosure structure (2) is sealed and connected to the cooling assembly (1) to form a housing space, the orthographic projection of the second housing cavity (12) along the first direction completely covers the housing space, and the battery module is arranged in the housing space.

9. An electric vehicle, characterized in that: include: The battery pack according to any one of claims 1 to 8.

10. The electric vehicle according to claim 9, characterized in that: Also includes: A cooling system, wherein the first accommodating chamber (11) of the cooling assembly (1) of the battery pack is in communication with the cooling system to allow the heat dissipation medium to circulate.

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