Battery pack and vehicle

Abstract

The present application discloses a battery pack and a vehicle. The battery pack comprises: a battery cell assembly, wherein the battery cell assembly comprises a plurality of battery cells; a first heat dissipation assembly, wherein the first heat dissipation assembly is arranged on one side of the battery cell assembly in a third direction; and a second heat dissipation assembly, wherein the arrangement position of the second heat dissipation assembly at least comprises any one of the following: the other side of the battery cell assembly in the third direction, at least part of the circumferential side surface of the battery cell assembly, and a position between at least some adjacent battery cells. The third direction is the height direction of the battery cells. By additionally providing the second heat dissipation assembly in the battery pack to dissipate heat from at least one position among the side surface of the battery cell assembly, one side in the third direction, and the position between adjacent battery cells, the contact area between a cooling system and the battery cell assembly is increased, that is, the heat exchange area between the battery cell assembly and the cooling system is increased, thereby enhancing the cooling effect on the battery cell assembly, enabling the battery cell assembly to satisfy temperature adjustment requirements, and ensuring the service life of the battery pack.

Description

A battery pack and a vehicle

[0001] This application claims priority to Chinese Patent Application No. 202520085972.9, filed on January 14, 2025, entitled “A Battery Pack and a Vehicle”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of power battery cooling, and more particularly to a battery pack and a vehicle. Background Technology

[0003] The power battery of a new energy vehicle is also called a battery pack. The temperature regulation of the battery pack is a core component in the development of new energy vehicles. Among them, the cooling system is the main component used to control and regulate the temperature of the power battery.

[0004] Currently, the single-sided cell assembly of power batteries is attached to the cooling system, resulting in poor thermal management performance. This fails to meet the heat dissipation requirements of the cell assembly during high-rate charging, leading to insufficient temperature control of the cell assembly and affecting the service life of the battery pack.

[0005] Therefore, how to provide a battery pack that improves the thermal management performance of the battery cell assembly and enables the battery cell assembly to meet the heat dissipation requirements during high-rate charging is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the above problems, this application provides a battery pack to improve the thermal management performance of the cell assembly, enabling the cell assembly to meet the heat dissipation requirements during high-rate charging. Furthermore, this application also provides a vehicle having the above-mentioned battery pack.

[0007] The specific plan is as follows:

[0008] The first aspect of this application provides a battery pack, comprising: a cell assembly including a plurality of individual cells; a first heat dissipation assembly disposed on one side of the cell assembly along a third direction; and a second heat dissipation assembly disposed at least in one of the following positions: the other side of the cell assembly along a third direction, at least a portion of the circumferential side of the cell assembly, and between at least a portion of the adjacent individual cells; wherein the third direction is the height direction of the individual cells.

[0009] In one possible implementation, in the battery pack described above, a plurality of the individual battery cells are arranged along a first direction to form a first group of individual battery cells, and the second heat dissipation component includes an intermediate heat dissipation component disposed between at least partially adjacent cells in the first group of individual battery cells; and / or, a plurality of the individual battery cells are arranged along a second direction to form a second group of individual battery cells, and the second heat dissipation component includes an intermediate heat dissipation component disposed between at least partially adjacent cells in the second group of individual battery cells; the first direction intersects the second direction.

[0010] In one possible implementation, in the battery pack described above, the second heat dissipation component includes a side heat dissipation component disposed on at least one side of the cell assembly along a first direction, the first direction intersecting with the third direction.

[0011] In one possible implementation, in the battery pack described above, the first heat dissipation component is disposed on the side of the cell assembly away from the cell having the terminal post along the third direction; the second heat dissipation component is disposed at least in one of the following locations: at least a portion of the circumferential side of the cell assembly, and at least a portion between adjacent cell units; the second heat dissipation component has a heat dissipation channel, at least a portion of the heat dissipation channel is disposed on the side of the second heat dissipation component near the terminal post, and the heat dissipation channel is used for circulating coolant.

[0012] In one possible implementation, the second heat dissipation component in the battery pack described above also has a first channel, which is disposed on the side of the second heat dissipation component close to the first heat dissipation component. The first channel is independent of the heat dissipation channel, and the circulating coolant does not circulate in the first channel.

[0013] In one possible implementation, the battery pack described above has multiple heat dissipation channels, multiple first channels, the extension direction of the heat dissipation channels is the same as the extension direction of the first channels, and the size and shape of the cross-section of the first channel along a third direction are approximately the same as the size and shape of the cross-section of the heat dissipation channel along a third direction.

[0014] In one possible implementation, in the battery pack described above, the ratio of the length of the heat dissipation channel along the third direction to the length of the second heat dissipation component along the third direction is in the range of 0.2-1.

[0015] In one possible implementation, in the battery pack described above, the heat dissipation channel is located in a third direction below the side of the cell assembly having the terminal post on the side near the terminal post.

[0016] The first channel is located on the side of the cell assembly away from the terminal post, and is higher in a third direction than the side of the cell assembly with the terminal post.

[0017] In one possible implementation, in the battery pack described above, the second heat dissipation component is a heat dissipation channel formed by a cooling plate; and the cooling plate is made of a non-metallic material.

[0018] In one possible implementation, in the battery pack described above, the first heat dissipation component includes: a heat exchange surface, which is used to be attached to the lower surface of the battery cell assembly, and the heat exchange surface is a metal plate; and an external surface, which is fixedly connected to the heat exchange surface and is used to exchange heat with the outside environment, and the external surface is made of a non-metallic material.

[0019] A second aspect of this application provides a vehicle including a battery pack, wherein the battery pack is any of the battery packs described above.

[0020] By using the above technical solution, the battery pack provided in this application, by adding a second heat dissipation component, dissipates heat at least at one location between the side of the cell assembly, the side along a third direction, and the adjacent cell, thereby increasing the contact area between the cooling system and the cell assembly, that is, increasing the heat exchange area between the cell assembly and the cooling system, thereby improving the cooling effect on the cell assembly, enabling the cell assembly to meet the temperature regulation requirements, and ensuring the service life of the battery pack.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application.

[0022] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0023] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0024] Figure 1 is a schematic diagram of the structure of a single battery cell provided in an embodiment of this application;

[0025] Figure 2 is a schematic diagram of the structure of the battery cell assembly provided in an embodiment of this application;

[0026] Figure 3 is a schematic diagram of the battery pack provided in an embodiment of this application;

[0027] Figure 4 is a partial exploded view of the battery pack provided in the embodiment of this application;

[0028] Figure 5 is a magnified view of part A in Figure 4;

[0029] Figure 6 is a schematic diagram of the bottom heat dissipation assembly provided in an embodiment of this application;

[0030] Figure 7 is a top view of the battery pack provided in an embodiment of this application;

[0031] Figure 8 is a cross-sectional view along the BB direction in Figure 7;

[0032] Figure 9 is a magnified view of part C in Figure 8;

[0033] In this design, 1000 represents the battery cell assembly, 100 represents the individual battery cell, 101 represents the first group of surfaces, 102 represents the second group of surfaces, and 103 represents the third group of surfaces; 200 represents the first heat dissipation assembly, 201 represents the heat exchange surface, and 202 represents the external surface; 300 represents the second heat dissipation assembly, 301 represents the first channel, 302 represents the heat dissipation channel, 311 represents the intermediate heat dissipation assembly, and 312 represents the side heat dissipation assembly. Detailed Implementation

[0034] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0036] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0037] The power battery of a new energy vehicle is also called a battery pack. The temperature regulation of the battery pack is a core component in the development of new energy vehicles. Among them, the cooling system is the main component used to control and regulate the temperature of the power battery.

[0038] Currently, the battery cells of power batteries are only attached to the cooling system on one side, resulting in poor thermal management performance. This makes it impossible to meet the heat dissipation requirements of the cells during high-rate charging, leading to insufficient temperature control of the cells and affecting the lifespan of the battery pack.

[0039] Based on this, this application discloses a battery pack for bonding with multiple surfaces of the battery cell assembly to increase the heat exchange area between the battery cell assembly and the cooling system, thereby improving the cooling effect on the battery cell assembly, enabling the battery cell assembly to meet temperature regulation requirements, and ensuring the service life of the battery pack.

[0040] As shown in Figure 1, the battery cell 100 involved in the embodiments of this application includes, but is not limited to, a rectangular prismatic battery cell. In some embodiments, the battery cell 100 includes a set of opposing first surfaces 101 arranged along a first direction, a set of opposing second surfaces 102 arranged along a second direction, and a set of opposing third surfaces 103 arranged along a third direction. It should be noted that one of the surfaces 103 in this document is provided with an electrode post. In some embodiments, the surface where the electrode post is located is specified as the upper surface of the battery cell 100, and the surface opposite to the upper surface is the lower surface. In this document, the third direction can also be referred to as the height direction of the battery cell 100.

[0041] The third group of surfaces 103 includes the upper and lower surfaces of the battery cell 100. In some embodiments, the upper surface may be provided with positive and negative electrode posts. The second group of surfaces 102 includes the first and second large surfaces of the battery cell 100. It should be noted that the first and second large surfaces are the two largest surfaces in the rectangular structure. The first group of surfaces 101 are the remaining two surfaces in the rectangular structure. For easy distinction, they can be named the first side surface and the second side surface.

[0042] As shown in Figure 2, the battery cell assembly 1000 in the embodiments of this application includes a plurality of battery cell units 100 connected in series, and these battery cell units 100 are arranged side by side, for example, in a matrix arrangement.

[0043] In some embodiments, there is a gap between the individual battery cells 100 arranged along the first direction; the individual battery cells 100 arranged along the second direction are attached together, which can be understood as the first large surface of one of the adjacent individual battery cells 100 along the second direction being attached to the second large surface of the other, so that the battery cell assembly 1000 has a compact structure, can integrate more individual battery cells 100, and is beneficial to improving the power of the battery cell assembly 1000.

[0044] It should be noted that the upper surface of the cell assembly 1000 is the same as the upper surface of the individual cell 100, the lower surface of the cell assembly 1000 is the same as the lower surface of the individual cell 100, and the side surface of the cell assembly 1000 is the same as the circumferential side surface of the individual cell 100 after encapsulation.

[0045] As shown in Figures 3, 4 and 7, the battery pack disclosed in the embodiments of this application includes a cell assembly 1000 and a cooling system. The cooling system includes a first heat dissipation assembly 200 and a second heat dissipation assembly 300.

[0046] The first heat dissipation component 200 is disposed on one side of the battery cell assembly 1000 along a third direction, and the second heat dissipation component 300 is disposed at least in one of the following locations: the other side of the battery cell assembly 1000 along a third direction, at least a portion of the circumferential side of the battery cell assembly 1000, and at least a portion between adjacent battery cells 100. The location of the second heat dissipation component 300 can be set according to heat dissipation requirements.

[0047] For example, the first heat dissipation component 200 is used to dissipate heat from the lower surface of the battery cell 100. Of course, the first heat dissipation component 200 can also be disposed on the upper surface of the battery cell 100. Optionally, the battery cell 100 is disposed on the first heat dissipation component 200, and the bottom surface of the battery cell 100 is in close contact with the first heat dissipation component 200. When the first heat dissipation component 200 dissipates heat from the lower surface, the second heat dissipation component 300 can dissipate heat from the upper surface.

[0048] The second heat dissipation component 300 can also be used to dissipate heat from the side of the battery cell 100. For example, the second heat dissipation component 300 is attached to the side of the battery cell 100. It should be noted that the side in this document includes at least one of the first side, the second side, the first large surface, and the second large surface.

[0049] It should be noted that this article only illustrates that the battery cell 100 has a rectangular structure. The battery cell 100 with cylindrical or other shapes is also within the scope of protection. The side of the cylindrical battery cell 100 includes the circumferential surface and the top surface.

[0050] In some embodiments, the second heat dissipation component 300 includes a middle heat dissipation component 311 and a side heat dissipation component 312.

[0051] In this arrangement, multiple battery cells 100 are arranged along a first direction to form a first group of battery cells, and an intermediate heat dissipation component 311 is disposed between at least some of the adjacent cells in the first group; and / or multiple battery cells 100 are arranged along a second direction to form a second group of battery cells, and an intermediate heat dissipation component 311 is disposed between at least some of the adjacent cells in the second group.

[0052] By setting an intermediate heat dissipation component 311 between adjacent first group of battery cells and / or adjacent second group of battery cells, the heat dissipation area can be increased and the heat dissipation effect of the battery cell assembly 1000 can be improved.

[0053] The aforementioned side heat dissipation component 312 is disposed on at least one side of the battery cell assembly 1000 along the first direction.

[0054] For example, the battery cell assembly 1000 is provided with side heat dissipation assemblies 312 on both sides along the first direction. After the multiple battery cells 100 of the battery cell assembly 1000 are arranged in a matrix, both sides of the battery cell assembly 1000 are exposed along the first direction. Therefore, the side heat dissipation assemblies 312 can be used to connect the first sides of all the battery cells 100 arranged along the second direction together, and connect the second sides of all the battery cells 100 arranged along the second direction together. Thus, the side heat dissipation assemblies 312 can dissipate heat from all the battery cells 100 arranged along the second direction, which helps to increase the heat dissipation area and improve the heat dissipation effect of the battery cell assembly 1000.

[0055] In an optional embodiment, adjacent first group of battery cells and adjacent second group of battery cells share the same side heat dissipation component 312. This can be understood as the adjacent battery cells 100 along the first direction being distributed on both sides of the side heat dissipation component 312 along the first direction and all being in contact with the side heat dissipation component 312.

[0056] It should be noted that when the first large surface and / or the second large surface of the battery cell 100 are selected for heat dissipation, there can be gaps between the battery cells 100 arranged along the second direction for placing the second heat dissipation assembly 300. The adjacent battery cells 100 along the second direction are distributed on both sides of the second heat dissipation assembly 300 along the second direction and are all in contact with the second heat dissipation assembly 300.

[0057] In this embodiment, the cooling system adds a second heat dissipation component 300 to dissipate heat from at least one of the sides of the battery cell assembly 1000, the side along a third direction, and the location between adjacent power batteries. This increases the contact area between the cooling system and the battery cell assembly 1000, i.e., increases the heat exchange area between the battery cell assembly 1000 and the cooling system, thereby improving the cooling effect on the battery cell assembly 1000, enabling the battery cell assembly 1000 to meet temperature regulation requirements, and ensuring the service life of the individual battery cells 100 in the battery cell assembly 1000.

[0058] As shown in Figures 5, 8, and 9, the side heat dissipation assembly 312 and the middle heat dissipation assembly 311 of the battery pack disclosed in this application have the same structure. It can be understood that both the side heat dissipation assembly 312 and the middle heat dissipation assembly 311 have a first channel 301 and a heat dissipation channel 302. Without distinguishing between the side heat dissipation assembly 312 and the middle heat dissipation assembly 311, it can be simply understood that the second heat dissipation assembly 300 has a first channel 301 and a heat dissipation channel 302.

[0059] It should be noted that in this embodiment, only the second heat dissipation component 300 is shown to be a coolant heat dissipation method. In other embodiments, the second heat dissipation component 300 may also be a heat dissipation fin, etc.

[0060] The first channel 301 and the heat dissipation channel 302 are independent channels. When it is necessary to increase the contact area between the second heat dissipation component 300 and the battery cell 100, coolant can be circulated in both the first channel 301 and the heat dissipation channel 302. When weight reduction is required, coolant can be circulated only in the first channel 301 or the heat dissipation channel 302 to reduce the amount of coolant in the first channel 301, thereby reducing the weight of the cooling system and, consequently, the weight of the battery pack, including the cooling system and the power battery.

[0061] It is understood that in other alternative embodiments, the second heat dissipation component 300 may only have heat dissipation channels 302, and at least part of the heat dissipation channels 302 may be provided on the side of the second heat dissipation component 300 near the pole (upper surface), and the heat dissipation channels 302 may be used for circulating coolant to simplify the structure.

[0062] In some embodiments, the first channel 301 and the heat dissipation channel 302 can be configured as channels that can be switched on and off. For example, the first channel 301 and the heat dissipation channel 302 can be switched on and off by setting a solenoid valve.

[0063] In this embodiment, the second heat dissipation component 300 is configured to have an independent first channel 301 and a heat dissipation channel 302, so that the second heat dissipation component 300 can meet different cooling requirements; and even if no coolant is placed in the first channel 301 or the heat dissipation channel 302, the presence of the first channel 301 and the heat dissipation channel 302 will increase the area of ​​the second heat dissipation component 300, thereby increasing the support force of the second heat dissipation component 300 on the battery cell 100, making the structure of the battery cell assembly 1000 formed by multiple battery cells 100 more stable and less likely to fall apart.

[0064] The increased number of heat dissipation components in the cooling system, i.e., the increased number of cooling plates, leads to an increase in the weight of the battery pack. Furthermore, the increased number of cooling plates also increases the amount of coolant inside them, further increasing the battery pack's weight. When considering battery pack weight reduction, it is necessary to simultaneously ensure the heat dissipation requirements of the individual battery cells 100, i.e., to cool the high-heat-load areas of the individual battery cells 100. It is understood that the heat dissipation channel 302 in this paper is preferably located near the high-heat-load areas of the individual battery cells 100.

[0065] For example, the heat dissipation channel 302 is arranged near the upper surface of the battery cell 100, that is, near the end with the battery cell posts (including positive electrode posts and negative electrode posts), and the first channel 301 is arranged near the lower surface of the battery cell 100, that is, the first channel 301 and the heat dissipation channel 302 are arranged in a third direction.

[0066] In some embodiments, there are multiple heat dissipation channels 302 arranged in parallel; there are multiple first channels 301 arranged in parallel. The extending direction of the heat dissipation channels 302 is the same as the extending direction of the first channels 301, and the size and shape of the cross-section of the first channel 301 along a third direction are approximately the same as the size and shape of the cross-section of the heat dissipation channels 302 along a third direction.

[0067] As shown in Figure 9, in this embodiment of the application, the first channel 301 and the heat dissipation channel 302 of the second heat dissipation component 300 are arranged along a third direction, and the dimension of the first channel 301 along the third direction is L1, and the dimension of the heat dissipation channel 302 along the third direction is L2.

[0068] In some embodiments, the dimensions of the first channel 301 and the heat dissipation channel 302 along a third direction need to be set according to the actual cooling requirements, and both are within the protection range.

[0069] In an optional embodiment, the proportion of heat dissipation channel 302 ranges from 20% to 100%. In this document, the proportion of heat dissipation channel 302 is [L2 / (L1+L2)]*100%. This can be understood as the ratio of the length of heat dissipation channel 302 along a third direction to the overall size of the second heat dissipation component 300 along a third direction ranging from 0.2 to 1.

[0070] In conjunction with the above, in some embodiments, the side of the heat dissipation channel 302 near the upper surface of the battery cell 100 is lower than the upper surface of the battery cell 100 along a third direction, and the height difference between the upper surface of the battery cell 100 and the side of the heat dissipation channel 302 near the upper surface of the battery cell 100 is 1mm-3mm.

[0071] In this embodiment, the heat dissipation channel 302 is lower than the upper surface of the battery cell 100 so that the second heat dissipation component 300 can be bonded to the battery cell 100.

[0072] In some embodiments, the side of the first channel 301 near the lower surface of the battery cell 100 has a gap with the lower surface of the battery cell 100 along a third direction, and the side of the first channel 301 near the lower surface of the battery cell 100 is higher than the lower surface of the battery cell 100. For example, the distance between the side of the first channel 301 near the lower surface of the battery cell 100 and the lower surface of the battery cell 100 is greater than 15 mm.

[0073] In this embodiment, the first channel 301 has a gap between the side of the lower surface of the battery cell 100 and the lower surface of the battery cell 100 along a third direction, so that there is a gap between the first channel 301 and the first heat dissipation component 200, so as to avoid overheating or overcooling at the intersection of the bottom and side surfaces of the battery cell 100, which would cause the battery cell 100 to have the lowest or highest temperature.

[0074] The second heat dissipation component 300 is a cooling channel formed by a cooling plate, and coolant circulates within the cooling channel to dissipate heat from the individual battery cell 100. It can be understood that both the first channel 301 and the heat dissipation channel 302 are formed by cooling plates. In some embodiments, the thickness of the cooling plate of the second heat dissipation component 300 is set to 0.3mm-1.5mm to ensure that the cooling plate simultaneously meets the requirements of low thermal resistance and high strength.

[0075] Based on the above technical solutions, in some scenarios, the battery cell assembly 1000 needs to work in a low-temperature environment, in which case it is necessary to keep the battery cell assembly 1000 warm.

[0076] Based on this, the cooling plate of the second heat dissipation component 300 disclosed in this application embodiment can be made of non-metallic material to reduce the amount of heat exchange between the second heat dissipation component 300 and the external environment and achieve heat preservation performance; in addition, non-metallic material also has corrosion resistance to improve the corrosion resistance of the cooling plate, so that no additional anti-corrosion measures are required for the cooling plate; furthermore, the weight of non-metallic material of the same size is smaller than that of metallic material, which can reduce the weight of the battery pack.

[0077] It should be noted that the cooling plate of the second heat dissipation component 300 in this embodiment can be made of either metal or non-metal as needed. Non-metallic materials involved in this application include, but are not limited to, nylon and plastic.

[0078] As shown in Figures 6 and 8, the first heat dissipation component 200 in this embodiment includes an external surface 202 and a heat exchange surface 201.

[0079] The heat exchange surface 201 includes, but is not limited to, a plate. The lower surface of the battery cell 100 is attached to and connected to the heat exchange surface 201 to achieve heat exchange with the battery cell 100. It can be understood that the heat exchange surface 201 can serve as the mounting base for the entire battery cell assembly 1000. The shape and size of the heat exchange surface 201 can be set according to different needs, and all are within the protection range.

[0080] The external surface 202 is installed on the side of the heat exchange surface 201 away from the battery cell 100 and exchanges heat with the external environment. The external surface 202 includes, but is not limited to, protrusions fixed to the heat exchange surface 201.

[0081] In some embodiments, the external surface 202 is made of non-metallic material, and the heat exchange surface 201 is made of metallic material. The external surface 202 and the heat exchange surface 201 are connected by adhesive or welding, among other things.

[0082] By using a non-metallic material for the external surface 202, the heat insulation performance of the external surface 202 is improved, which can effectively isolate heat exchange with the outside world, thereby reducing the amount of heat exchange between the external surface 202 and the external environment and achieving heat preservation performance. In addition, the non-metallic material also has corrosion resistance, which improves the corrosion resistance of the cooling plate, eliminating the need for additional anti-corrosion measures for the cooling plate. Furthermore, the weight of the non-metallic material of the same size is less than that of the metallic material, which can reduce the weight of the battery pack.

[0083] The heat exchange surface 201 is made of metal to ensure the heat exchange efficiency between the heat exchange surface 201 of the first heat dissipation component 200 and the battery cell 100.

[0084] It should be noted that the external surface 202 and the cooling plate of the second heat dissipation component 300 in this embodiment may be made entirely or partially of non-metallic material.

[0085] Based on the above embodiments, the battery pack in this application embodiment has the following effects: by increasing the heat exchange surface between the cell assembly 1000 and the cooling system, the heat exchange efficiency of the cell assembly 1000 is effectively improved, enabling the battery pack to adapt to higher-rate fast charging; by using non-metallic materials for at least a portion of the cooling plates of the external surface 202 and the second heat dissipation component 300, the heat insulation performance of non-metallic materials can be utilized to meet the battery pack's heat preservation performance requirements; by using non-metallic materials for at least a portion of the cooling plates of the external surface 202 and the second heat dissipation component 300, the corrosion resistance of non-metallic materials can be utilized to meet the battery pack's corrosion resistance requirements, eliminating the need for additional heat preservation and corrosion prevention measures, thereby achieving cost reduction; by using non-metallic materials for at least a portion of the cooling plates of the external surface 202 and the second heat dissipation component 300, the battery pack can be made lighter.

[0086] In addition, this application also discloses a vehicle including a battery pack, wherein the battery pack is the battery pack disclosed in the above embodiments. Therefore, the vehicle with the battery pack also has all the above-mentioned technical effects, which will not be described in detail here.

[0087] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0088] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized by, The application relates to a battery cell assembly and a battery cell module. The battery cell assembly (1000) comprises a plurality of battery cell monomers (100); A first heat dissipation assembly (200) is arranged on one side of the battery cell assembly (1000) along a third direction; A second heat dissipation assembly (300) is arranged on at least one of the following positions: the other side of the battery cell assembly (1000) along the third direction, at least part of the circumferential side of the battery cell assembly (1000), and between at least part of the adjacent battery cell monomers (100); The third direction is the height direction of the battery cell monomer (100).

2. The battery pack of claim 1, wherein, A plurality of battery cell monomers (100) are arranged as a first group of battery cell monomers along a first direction, and the second heat dissipation assembly (300) comprises an intermediate heat dissipation assembly (311) arranged between at least part of the adjacent first group of battery cell monomers; And / or A plurality of battery cell monomers (100) are arranged as a second group of battery cell monomers along a second direction, and the second heat dissipation assembly (300) comprises an intermediate heat dissipation assembly arranged between at least part of the adjacent second group of battery cell monomers; The first direction intersects the second direction.

3. The battery pack of claim 1 or 2, wherein, The second heat dissipation assembly (300) comprises a side heat dissipation assembly (312) arranged on at least one side of the battery cell assembly (1000) along the first direction, and the first direction intersects the third direction.

4. The battery pack of any one of claims 1 to 3, wherein, The first heat dissipation assembly (200) is arranged on the side of the battery cell assembly (1000) away from the side of the battery cell monomer (100) with a pole column along the third direction; The second heat dissipation assembly (300) is arranged on at least one of the following positions: at least part of the circumferential side of the battery cell assembly (1000), and at least part of the adjacent battery cell monomers (100); The second heat dissipation assembly (300) has a heat dissipation channel (302), and at least part of the heat dissipation channel (302) is arranged on the side of the second heat dissipation assembly (300) close to the side with the pole column, and the heat dissipation channel (302) is used for circulating cooling liquid.

5. The battery pack of claim 4, wherein: The second heat dissipation assembly (300) further has a first channel (301) arranged on the side of the second heat dissipation assembly (300) close to the first heat dissipation assembly (200), the first channel (301) and the heat dissipation channel (302) are independent of each other, and the first channel (301) does not circulate the cooling liquid.

6. The battery pack of claim 5, wherein, The number of the heat dissipation channels (302) is plural, the number of the first channels (301) is plural, the extension direction of the heat dissipation channels (302) is the same as the extension direction of the first channels (301), and the size and shape of the cross section of the first channels (301) along the third direction are substantially the same as the size and shape of the cross section of the heat dissipation channels (302) along the third direction.

7. The battery pack of any one of claims 4 to 6, wherein, The ratio of the length of the heat dissipation channel (302) along the third direction to the length of the second heat dissipation assembly (300) along the third direction ranges from 0.2 to 1.

8. The battery pack of claim 5 or 6, wherein, The heat dissipation channel (302) is lower than the side of the battery cell assembly (1000) having the pole along the third direction. The first channel (301) is higher than the side of the battery cell assembly (1000) having the pole along the third direction.

9. The battery pack of any one of claims 1-8, wherein, The second heat dissipation assembly (300) is a heat dissipation channel formed by a cooling plate. The material of the cooling plate is a non-metal material.

10. The battery pack of any one of claims 1 to 9, wherein, The first heat dissipation assembly (200) comprises: a heat exchange surface (201) for abutting the lower surface of the battery cell assembly (1000), the heat exchange surface (201) being a metal plate; an external surface (202) fixedly connected with the heat exchange surface (201), and the external surface (202) being used for heat exchange with the outside, the material of the external surface (202) being a non-metal material.

11. A vehicle comprising a battery pack, characterized by The battery pack is the battery pack according to any one of claims 1 to 10.

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