Liquid cooling components and battery pack

Abstract

This application provides a liquid-cooled assembly and a battery pack, relating to the field of battery technology. The liquid-cooled assembly includes two end plates and a liquid-cooled plate located between the two end plates. The liquid-cooled plate includes multiple panels, with any two adjacent panels connected. Each panel has a sub-channel, and each end plate has a cavity communicating with the sub-channel. The liquid cooling medium within the sub-channel flows through the cavity to either converge or diverge. Each panel also has an isolation cavity, separated from the sub-channel, and contains connectors. By providing an isolation cavity within the panel, the liquid-cooled assembly and battery pack, due to the separation between the isolation cavity and the sub-channel, allow the connectors within the isolation cavity to be used for mounting battery modules, preventing leakage of the liquid cooling medium from the sub-channel through the connector mounting points, thereby reducing the risk of liquid cooling medium leakage.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a liquid cooling component and a battery pack. Background Technology

[0002] To ensure efficient charging and discharging of power batteries, they are generally equipped with a battery thermal management system. Currently, battery thermal management systems are mainly divided into three types: air-cooled, direct-cooled, and liquid-cooled. Among them, the liquid-cooled battery thermal management system can control the battery temperature between 25℃ and 35℃, effectively increasing the number of charge-discharge cycles and is widely used in practice.

[0003] Typically, in a battery pack, a liquid cooling component is located at the bottom of the battery module. The liquid cooling medium within the component exchanges heat with the battery module, thereby achieving thermal management of the battery module.

[0004] However, there is a risk of leakage of the liquid cooling medium within the liquid cooling assembly. Summary of the Invention

[0005] This application provides a liquid cooling component and battery pack for reducing the risk of liquid cooling medium leakage.

[0006] In a first aspect, this application provides a liquid cooling assembly, including a liquid cooling plate and end plates located on both sides of the liquid cooling plate;

[0007] The liquid cooling plate includes multiple panels, any two adjacent panels are connected, each panel has a sub-channel, and each end plate has a cavity. The cavity is connected to the sub-channel, and the liquid cooling medium in the sub-channel flows through the cavity to converge or diverge.

[0008] The panel also has an isolation cavity, which is separated from the sub-channel, and the isolation cavity has a connector for connecting the battery module.

[0009] In one possible implementation, the connector is a pre-embedded nut.

[0010] In one possible implementation, the liquid cooling assembly further includes a module mounting profile, which is connected to the liquid cooling plate via the pre-embedded nut, and the module mounting profile has a first connecting portion for mounting a battery module.

[0011] In one possible implementation, the liquid cooling plate has an inlet and an outlet, one of the two cavities is connected to the inlet and the other is connected to the outlet;

[0012] Along the extension direction of the panel, the water inlet and the water outlet are located on the same side of the liquid cooling plate.

[0013] In one possible implementation, the two cavities each have a branch channel and a confluence channel;

[0014] The diversion channel is connected to the inlet, and the diversion channel has a diversion port that is connected to each of the sub-channels;

[0015] The confluence channel is connected to the outlet, and the confluence channel has a confluence port that is connected to each of the sub-channels.

[0016] In one possible implementation, the liquid cooling plate has a connection channel, one end of which is connected to the water inlet, and the other end of which is connected to the cavity having the diversion channel.

[0017] In one possible implementation, each of the panels has a male connector and a female connector;

[0018] The male connector of one panel is connected to the female connector of another panel.

[0019] In one possible implementation, each of the panels is welded to the end plate, and each panel has welding notches at its four corners, which are isolated from the flow channel.

[0020] In one possible implementation, the end plate has two opposing limiting bosses, and the liquid cooling plate is snapped between the two limiting bosses.

[0021] In one possible implementation, the liquid cooling assembly further includes an expansion unit mounting profile, which is connected to the liquid cooling plate via the connector, and the expansion unit mounting profile has a second connecting portion.

[0022] Secondly, this application provides a battery pack, the battery pack including a battery module and a liquid cooling assembly as described above, wherein the battery module is mounted on the liquid cooling plate of the liquid cooling assembly via a connector in the liquid cooling assembly.

[0023] In one possible implementation, the battery module is arranged in a direction parallel to the splicing direction of each panel in the liquid cooling assembly;

[0024] Alternatively, the arrangement direction of the battery modules is perpendicular to the splicing direction of each panel in the liquid cooling assembly.

[0025] The liquid cooling component and battery pack provided in this application have the following beneficial effects:

[0026] The liquid cooling assembly provided in this application includes a liquid cooling plate and two end plates located on both sides of the liquid cooling plate. The liquid cooling plate comprises multiple panels, and any two adjacent panels are connected, allowing the liquid cooling plate to expand along the splicing direction of the panels, thereby improving the versatility of the liquid cooling assembly. Each panel has a sub-channel, and the end plates have cavities that communicate with the sub-channels. The liquid cooling medium within the sub-channels flows through the cavities, either converging or diverging, allowing the liquid cooling medium to flow within the cavities and sub-channels. This enables the liquid cooling medium to exchange heat with the battery module, thereby achieving thermal management of the battery module.

[0027] Compared to related technologies, the liquid cooling assembly and battery pack provided in this application connect the battery module to the liquid cooling assembly by setting an isolation cavity within the panel and having a connector inside the isolation cavity. Since the isolation cavity is separated from the sub-channel, leakage of the liquid cooling medium in the sub-channel from the installation point of the pre-embedded nut is prevented, thereby reducing the risk of liquid cooling medium leakage. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] Figure 1 This is an exploded structural diagram of a liquid cooling component provided in an embodiment of this application;

[0030] Figure 2 A three-dimensional structural schematic diagram of a liquid cooling component provided in an embodiment of this application;

[0031] Figure 3 A cross-sectional view of a liquid cooling assembly provided in an embodiment of this application;

[0032] Figure 4 for Figure 3 A magnified view of part A in the middle;

[0033] Figure 5 A schematic diagram of a flow channel connection provided in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of another flow channel connection provided in an embodiment of this application;

[0035] Figure 7 A cross-sectional view of a panel provided in an embodiment of this application;

[0036] Figure 8 A cross-sectional view of another panel provided in an embodiment of this application;

[0037] Figure 9 A cross-sectional view of another panel provided in an embodiment of this application;

[0038] Figure 10 A three-dimensional structural diagram of an end plate provided in an embodiment of this application;

[0039] Figure 11 A schematic diagram of the connection between a panel and an end plate provided in an embodiment of this application;

[0040] Figure 12 for Figure 2 A magnified view of part B in the diagram;

[0041] Figure 13 This application provides a schematic diagram of the structure of a battery pack;

[0042] Figure 14 A schematic diagram of another battery pack provided in this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 10-End plate;

[0045] 11-Cavity; 111-Branch channel; 112-Management channel; 113-Branch outlet; 114-Management outlet;

[0046] 12-Limiting protrusion;

[0047] 20-Liquid cooling plate;

[0048] 21-Assembly plate; 201-Inlet; 202-Outlet; 211-Sub-channel; 212-Isolation chamber;

[0049] 213-Connector; 214-Male plug-in terminal; 215-Female plug-in terminal; 216-Welding notch;

[0050] 217 - Connection Channel;

[0051] 30 - Module mounting profile;

[0052] 40 - Expansion unit mounting profile;

[0053] 50-Battery Module.

[0054] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0055] As described in the background section, there is a risk of leakage of the liquid cooling medium within the liquid cooling assembly. This problem arises because the relevant technology connects the liquid cooling plate of the liquid cooling assembly to the battery module via threaded connectors such as screws and bolts. The liquid cooling plate has flow channels, and because the threaded connectors penetrate these channels, the liquid cooling medium within the channels can easily leak from the connection points of the threaded connectors, thus posing a leakage risk.

[0056] To address the aforementioned technical problems, this application provides a liquid cooling assembly and a battery pack. By providing an isolation cavity within the panel, and having a connector within the isolation cavity, the battery module can be installed, thereby connecting the battery module to the liquid cooling assembly. Because the isolation cavity is separated from the sub-channels, leakage of the liquid cooling medium from the pre-embedded nut installation point is prevented, thus reducing the risk of liquid cooling medium leakage.

[0057] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0058] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0059] This application provides a liquid cooling component, referenced... Figure 1 and Figure 2 The liquid cooling assembly includes end plates 10 and a liquid cooling plate 20. The liquid cooling plate 20 has two end plates 10 on each side, with each end plate 10 located on one side of the liquid cooling plate 20. For example, the two end plates 10 are welded to or threaded to both ends of the liquid cooling plate 20. The liquid cooling plate 20 includes multiple panels 21. The number of panels 21 is not limited and is determined based on the size of the battery module. Adjacent panels 21 are connected, and multiple panels 21 are joined together to form the liquid cooling plate 20. It should be noted that each end plate 10 can be a one-piece structure or can be formed by joining multiple panels.

[0060] refer to Figure 3 and Figure 4 Each panel 21 has a sub-channel 211 for the flow of liquid cooling medium. (Reference) Figure 5 and Figure 6 The end plate 10 has a cavity 11, which is connected to the sub-channel 211. The liquid cooling medium in the sub-channel 211 is drawn together or divided through the cavity 11.

[0061] For example, refer to Figure 5 and Figure 6 The first cavity 11 connects to the inlet end of each sub-channel 211, allowing the liquid cooling medium to flow through the first cavity 11 and into the inlet of each sub-channel 211. The second cavity 11 connects to the outlet end of each sub-channel 211, allowing the liquid cooling medium to flow through the outlet end of each sub-channel 211 and into the second cavity 11. This allows the liquid cooling medium to circulate within the liquid cooling assembly, facilitating heat exchange between the liquid cooling medium and the battery module, and enabling thermal management of the battery module.

[0062] It should be noted that multiple heat dissipation fins can be provided in each sub-channel 211 to increase the heat dissipation area and improve the heat dissipation effect of the liquid cooling component.

[0063] refer to Figure 7 The panel 21 has an isolation cavity 212. The isolation cavity 212 can be located in the cavities on both sides of the sub-channel 211. The isolation cavity 212 is separated from and does not communicate with the sub-channel 211, and the liquid cooling medium in the sub-channel 211 will not flow into the isolation cavity 212. The isolation cavity 212 has a connector 213, which is used to connect the battery module. For example, the battery module can be directly threaded to the connector 213, or the battery module can be indirectly connected to the connector 213 through a battery module mounting component; this application does not limit this. The connector 213 can be a threaded connector such as a screw or bolt, or a snap-fit ​​connector such as a snap-fit ​​protrusion.

[0064] refer to Figure 8 The isolation cavity 212 can also be T-shaped to facilitate the installation of the connector 213. Furthermore, see reference... Figure 9 The isolation cavity 212 can also be located above or below the sub-channel 211. This application does not limit this, and the specific location can be determined according to the installation position of the battery module.

[0065] Since the isolation chamber 212 is isolated from the cavity 11, the liquid cooling medium in the sub-channel 211 is prevented from leaking from the installation point of the connector 213, thereby reducing the risk of liquid cooling medium leakage.

[0066] It should be noted that panel 21 can be a metal profile, such as an aluminum profile. The cross-sectional shape of panel 21 is the same, thereby reducing the types of molds required to produce panel 21 and lowering production costs.

[0067] The liquid cooling assembly provided in this application includes a liquid cooling plate 20 comprising multiple panels 21, with any two adjacent panels 21 connected together. This allows the liquid cooling plate 20 to expand along the splicing direction of the panels 21, improving the versatility of the liquid cooling assembly. Each panel 21 has a sub-flow channel 211, and the end plate 10 has a cavity 11 connected to the sub-flow channel 211. The liquid cooling medium within the sub-flow channel 211 flows through or is distributed within the cavity 11, allowing the liquid cooling medium to flow within both the cavity 11 and the sub-flow channel 211. This enables heat exchange between the liquid cooling medium and the battery module, thereby achieving thermal management of the battery module. An isolation cavity 212 is provided within the panel 21, and the isolation cavity 212 contains a connector 213. The connector 213 can be used to install the battery module, thus connecting the battery module to the liquid cooling assembly. Since the isolation chamber 212 is separated from the sub-channel 211, the liquid cooling medium in the sub-channel 211 is prevented from leaking from the installation point of the connector 213, thereby reducing the risk of liquid cooling medium leakage.

[0068] In some embodiments, the connector 213 is a pre-embedded nut, which has internal threads and is embedded in the main body product to form an effective thread in the main body product. This configuration allows the internal threads to be formed in the isolation cavity 212, enabling the pre-embedded nut to be threadedly connected to the battery module, thereby facilitating the assembly and disassembly of the battery module and the liquid cooling plate 20.

[0069] In some embodiments, reference Figure 1 and Figure 2 The liquid cooling assembly also includes a module mounting profile 30, which is connected to the liquid cooling plate 20 by pre-embedded nuts, for example, the module mounting profile 30 is connected to the pre-embedded nuts by bolts.

[0070] The module mounting profile 30 has a first connecting portion for mounting the battery module. This first connecting portion can be a threaded connection, such as a rivet nut for connecting the battery module, provided on the module mounting profile 30. This allows the battery module to be indirectly connected to the liquid cooling plate 20 via the module mounting profile 30. Compared to a direct connection between the battery module and the liquid cooling plate 20, this embodiment reduces the number of openings in the liquid cooling plate 20 and improves the installation reliability of the battery module.

[0071] In addition, the module mounting profile 30 can have the same cross-section as the end plate 10, thereby reducing the types of molds required to produce the module mounting profile 30 and the end plate 10, and reducing production costs.

[0072] In some embodiments, reference Figure 2 The liquid cooling plate 20 has an inlet 201 and an outlet 202. (Reference) Figure 5 and Figure 6One of the two cavities 11 is connected to the inlet 201, and this cavity 11 is used for diversion. The other cavity 11 is connected to the outlet 202, and this cavity 11 is used for confluence.

[0073] It should be noted that the cavity 11 can be directly or indirectly connected to the inlet 201 or the outlet 202. For example, in one implementation, referring to 6, one cavity 11 is directly connected to the inlet 201, and the other cavity 11 is directly connected to the outlet 202.

[0074] In another implementation, refer to Figure 5 The cavity 11 for diverting water is indirectly connected to the inlet 201 via a connecting channel 217, which is a channel opened within the liquid cooling plate 20. The two ends of the connecting channel 217 are connected to the inlet 201 and the cavity 11 for diverting water, respectively. The cavity 11 for merging water is directly connected to the outlet 202.

[0075] refer to Figure 2 Along the splicing direction of the panel 21, the inlet 201 and outlet 202 can be respectively located on both sides of the extending direction of the liquid cooling plate 20. The extending direction of the liquid cooling plate 20 can be the length direction of the liquid cooling plate 20. This arrangement makes it easy to connect the inlet 201 and outlet 202 to external pipelines.

[0076] In some embodiments, reference Figure 5 and Figure 6 The two cavities 11 each have a flow branch channel 111 and a flow convergence channel 112, wherein the cavity 11 with the flow branch channel 111 is used for flow branching, and the cavity with the flow convergence channel 112 is used for flow convergence.

[0077] The diversion channel 111 is connected to the inlet 201. The diversion channel 111 has multiple diversion ports 113, each of which is connected to the inlet end of each sub-channel 211, thereby diverting the liquid cooling medium injected into the inlet 201 into each sub-channel 211.

[0078] The manifold 112 is connected to the outlet 202. The manifold 112 has multiple manifolds 114, each of which is connected to the outlet end of each sub-channel 211, so that each liquid cooling medium flows into the manifold 112 and then flows out through the outlet 202.

[0079] The embodiments of this application can achieve better temperature and flow uniformity of the liquid cooling plate by controlling the size of each branch port 113 and each confluence port 114.

[0080] In some embodiments, reference Figures 7-9Each panel 21 has a male connector 214 and a female connector 215. The male connector 214 may be protruding, and the female connector 215 may be recessed. Adjacent panels 21 are fitted together by interlocking, with the male connector 214 of the first panel 21 engaging with the female connector 215 of the second panel 21.

[0081] The panels 21 are usually connected by welding. In order to ensure the welding effect, the thickness of each panel 21 needs to be increased, which increases the weight of the liquid cooling component and the battery pack. In the embodiment of this application, the panels 21 are connected by plug-in connection, which avoids this technical problem and enables the lightweight design of the liquid cooling component and the battery pack.

[0082] In some embodiments, each panel 21 is welded to the end plate 10. (See reference) Figure 1 and Figure 12 Each panel 21 has a welding notch 216 at each of its four corners. The shape of the welding notch 216 can be elongated, approximately elongated, cylindrical, or approximately cylindrical; this application does not impose any limitation on this. The welding notch 216 facilitates the welding of the panel 21 to the end plate 10, avoiding welding dead corners. The welding notch 216 is isolated from each sub-channel 211, preventing leakage of liquid cooling medium from the welding notch 216.

[0083] Based on the above embodiments, refer to Figure 10 and Figure 11 The end plate 10 also has two opposing limiting protrusions 12, which can be strip-shaped protrusions extending toward the liquid cooling plate 20. The liquid cooling plate 20 is engaged between the two limiting protrusions 12; for example, the top and bottom of the liquid cooling plate 20 abut against the two limiting protrusions 12 respectively. This arrangement increases the connection strength between the liquid cooling plate 20 and the end plate 10, reducing the risk of welding failure between them.

[0084] In some embodiments, reference Figure 1 and Figure 2 The liquid cooling assembly also includes an expansion unit mounting profile 40, which is connected to the liquid cooling plate 20 via a connector 213. For example, the expansion unit mounting profile 40 is connected to the connector 213 via bolts. The expansion unit mounting profile 40 has a second connection portion for connecting an expansion unit, which can be a cover plate of the battery pack or other components in the battery pack that need to be connected to the liquid cooling plate 20.

[0085] In addition, the expansion unit mounting profile 40 can have the same cross-section as the end plate 10, thereby reducing the types of molds for the expansion unit mounting profile 40 and the end plate 10 and reducing production costs.

[0086] This application also provides a battery pack, see reference. Figure 13 and Figure 14 The battery pack includes a battery module 50 and a liquid cooling assembly. The specific structure and connection method of the liquid cooling assembly can be found in any of the above embodiments. The battery module 50 is connected to the liquid cooling plate 20 via a connector 213. Since the battery pack provided in this application includes the liquid cooling assembly in any of the above embodiments, it has at least the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0087] In one possible implementation, refer to Figure 13 The battery modules are arranged parallel to the splicing direction of the panels in the liquid cooling assembly. The connection relationships of the sub-channels 211, branch channels 111, and junction channels 112 can be found in [reference needed]. Figure 5 .

[0088] In another possible implementation, refer to Figure 14 The battery module arrangement direction is perpendicular to the splicing direction of the panels in the liquid cooling assembly. At this time, the connection relationship of the sub-channel 211, branch channel 111, and junction channel 112 can be found in [reference needed]. Figure 6 .

[0089] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0090] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0091] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0093] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0094] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0095] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A liquid cooling assembly, characterized in that, Includes a liquid cooling plate and end plates located on both sides of the liquid cooling plate; The liquid cooling plate includes multiple panels, any two adjacent panels are connected, each panel has a sub-channel, and each end plate has a cavity. The cavity is connected to the sub-channel, and the liquid cooling medium in the sub-channel flows through the cavity to converge or diverge. The panel also has an isolation cavity, which is separated from the sub-channel, and the isolation cavity has a connector for connecting the battery module. The connector is a pre-embedded nut; It also includes a module mounting profile, which is connected to the liquid cooling plate via the pre-embedded nut, and the module mounting profile has a first connecting part for mounting the battery module.

2. The liquid cooling assembly according to claim 1, characterized in that, The liquid cooling plate has an inlet and an outlet, and one of the two cavities is connected to the inlet and the other is connected to the outlet. Along the extension direction of the panel, the water inlet and the water outlet are located on the same side of the liquid cooling plate.

3. The liquid cooling assembly according to claim 2, characterized in that, The two cavities each have a branch channel and a confluence channel; The diversion channel is connected to the inlet, and the diversion channel has a diversion port that is connected to each of the sub-channels; The confluence channel is connected to the outlet, and the confluence channel has a confluence port that is connected to each of the sub-channels.

4. The liquid cooling assembly according to claim 3, characterized in that, The liquid cooling plate has a connection channel, one end of which is connected to the water inlet, and the other end of which is connected to the cavity with the diversion channel.

5. The liquid cooling assembly according to claim 1, characterized in that, Each of the aforementioned panels has a male connector and a female connector; The male connector of one panel is connected to the female connector of another panel.

6. The liquid cooling assembly according to claim 1, characterized in that, Each of the aforementioned panels is welded to the end plate, and each panel has welding notches at its four corners, which are isolated from the sub-channels.

7. The liquid cooling assembly according to claim 3, characterized in that, The end plate has two opposing limiting bosses, and the liquid cooling plate is snapped between the two limiting bosses.

8. The liquid cooling assembly according to claim 1, characterized in that, The liquid cooling assembly also includes an expansion unit mounting profile, which is connected to the liquid cooling plate via the connector, and the expansion unit mounting profile has a second connecting portion.

9. A battery pack, characterized in that, It includes a battery module and a liquid cooling assembly as described in any one of claims 1-8, wherein the battery module is mounted on the liquid cooling plate of the liquid cooling assembly via a connector in the liquid cooling assembly.

10. The battery pack according to claim 9, characterized in that, The battery module is arranged in a direction parallel to the splicing direction of each panel in the liquid cooling assembly. Alternatively, the arrangement direction of the battery modules is perpendicular to the splicing direction of each panel in the liquid cooling assembly.

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