Liquid cooling assembly and battery pack

Abstract

The invention provides a liquid cooling assembly and a battery pack, and relates to the technical field of batteries. The liquid cooling assembly comprises two end plates and a liquid cooling plate located between the two end plates. The liquid cooling plate comprises a plurality of jointed plates, any two adjacent jointed plates are connected, each jointed plate is internally provided with a sub-flow channel, each end plate is internally provided with a cavity, the cavities are communicated with the sub-flow channels, and the liquid cooling medium in the sub-flow channels is converged or shunted through the cavities. An isolation cavity is further formed in the jointed board, the isolation cavity is separated from the sub-flow channels, and a connecting piece is arranged in the isolation cavity. According to the liquid cooling assembly and the battery pack, the isolation cavities are formed in the jointed plates, and the isolation cavities are separated from the sub-flow channels, so that the connecting pieces in the isolation cavities can be used for mounting the battery modules, liquid cooling media in the sub-flow channels are prevented from leaking from the mounting positions of the connecting pieces, and the leakage risk of the liquid cooling media is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a liquid cooling assembly and a battery pack. Background Art

[0002] In order to effectively charge and discharge power batteries, power batteries 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 battery charge and discharge cycles and is widely used in practice.

[0003] Typically, in a battery pack, a liquid cooling assembly is disposed at the bottom of a battery module, and heat is exchanged between the liquid cooling medium in the liquid cooling assembly and the battery module, thereby achieving thermal management of the battery module.

[0004] However, there is a risk of leakage of the liquid cooling medium in the liquid cooling component. Summary of the invention

[0005] The present application provides a liquid cooling assembly and a battery pack for reducing the risk of leakage of liquid cooling medium.

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

[0007] The liquid cooling plate comprises a plurality of panels, any two adjacent panels are connected, each panel has a sub-channel, each end plate has a cavity, the cavity is connected to the sub-channel, and the liquid cooling medium in the sub-channel converges or diverges through the cavity;

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

[0009] In a possible implementation, the connecting piece is a pre-embedded nut.

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

[0011] In a possible implementation, a water inlet and a water outlet are provided on the liquid cooling plate, one of the two cavities is connected to the water inlet, and the other is connected to the water outlet;

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

[0013] In a possible implementation, the two cavities are respectively provided with a flow dividing channel and a flow converging channel;

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

[0015] The confluence channel is communicated with the water outlet, and the confluence channel has a confluence port communicated with each of the sub-flow channels.

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

[0017] In a possible implementation, each of the panels has a male plug-in end and a female plug-in end;

[0018] The male plug-in end of the panel is plugged into and matched with the female plug-in end of another panel.

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

[0020] In a possible implementation, the end plate has two limiting bosses that are arranged opposite to each other, and the liquid cooling plate is clamped between the two limiting bosses.

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

[0022] In a second aspect, the present application provides a battery pack, comprising a battery module and any one of the above-mentioned liquid cooling components, wherein the battery module is mounted on a liquid cooling plate of the liquid cooling component via a connector in the liquid cooling component.

[0023] In a possible implementation, the arrangement direction of the battery modules is parallel to the splicing direction of the panels in the liquid cooling assembly;

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

[0025] The liquid cooling assembly and battery pack provided by the present application have the following beneficial effects:

[0026] The liquid cooling assembly provided by the present application includes a liquid cooling plate and two end plates located on both sides of the liquid cooling plate. The liquid cooling plate includes a plurality of panels, and any two adjacent panels are connected, so that the liquid cooling plate can be expanded along the splicing direction of the panels to improve the versatility of the liquid cooling assembly. The panels have sub-flow channels, the end plates have cavities, the cavities are connected to the sub-flow channels, and the liquid cooling medium in the sub-flow channels converges or diverges through the cavities, so that the liquid cooling medium can flow in the cavities and the sub-flow channels, so that the liquid cooling medium can exchange heat with the battery module, thereby realizing thermal management of the battery module.

[0027] Compared with the related art, the liquid cooling assembly and battery pack provided by the present application connect the battery module to the liquid cooling assembly by providing an isolation cavity in the panel, and the isolation cavity has a connector, and the battery module is connected through the connector, so as to connect the battery module to the liquid cooling assembly. Since the isolation cavity is separated from the sub-channel, the liquid cooling medium in the sub-channel is prevented from leaking from the installation place of the embedded nut, thereby reducing the risk of leakage of the liquid cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 1 A schematic diagram of an exploded structure of a liquid cooling component provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the three-dimensional structure of a liquid cooling assembly provided in an embodiment of the present application;

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

[0032] Figure 4 for Figure 3 A partial enlarged schematic diagram of part A;

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

[0034] Figure 6 A schematic diagram of another flow channel connection provided in an embodiment of the present application;

[0035] Figure 7 A cross-sectional view of a puzzle board provided in an embodiment of the present application;

[0036] Figure 8 A cross-sectional view of another puzzle board provided in an embodiment of the present application;

[0037] Fig. 9 A cross-sectional view of another puzzle board provided in an embodiment of the present application;

[0038] Fig.10 A schematic diagram of a three-dimensional structure of an end plate provided in an embodiment of the present application;

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

[0040] Fig.12 for Figure 2 A partial enlarged schematic diagram of part B in FIG.

[0041] Fig.13 A schematic diagram of the structure of a battery pack provided in this application;

[0042] Fig.14 A schematic diagram of the structure of another battery pack provided for this application.

[0043] Description of reference numerals:

[0044] 10-end plate;

[0045] 11-cavity; 111-dividing channel; 112-converging channel; 113-dividing port; 114-converging port;

[0046] 12-limiting protrusion;

[0047] 20-Liquid cooling plate;

[0048] 21- panel; 201- water inlet; 202- water outlet; 211- sub-channel; 212- isolation chamber;

[0049] 213-connecting piece; 214-male end for plugging; 215-female end for plugging; 216-welding notch;

[0050] 217-Connection channel;

[0051] 30-module installation profile;

[0052] 40-Extension unit mounting profile;

[0053] 50-Battery module.

[0054] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0055] As described in the background technology, there is a risk of leakage of the liquid cooling medium in the liquid cooling assembly. The reason for this problem is that the relevant technology connects the liquid cooling plate of the liquid cooling assembly through screws, bolts and other threaded connectors through the battery module. The liquid cooling plate has a flow channel. Since the threaded connector penetrates into the flow channel, the liquid cooling medium in the flow channel is easy to leak from the connection of the threaded connector, resulting in the risk of leakage of the liquid cooling medium.

[0056] In view of the above technical problems, the embodiments of the present application provide a liquid cooling assembly and a battery pack, wherein an isolation cavity is provided in the panel, and a connector is provided in the isolation cavity, so that the connector can be used to install the battery module, thereby connecting the battery module to the liquid cooling assembly. Since the isolation cavity is separated from the sub-channel, the liquid cooling medium in the sub-channel is prevented from leaking from the installation location of the embedded nut, thereby reducing the risk of leakage of the liquid cooling medium.

[0057] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

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

[0059] The present application provides a liquid cooling component, referring to Figure 1 and Figure 2 The liquid cooling assembly includes an end plate 10 and a liquid cooling plate 20. The liquid cooling plate 20 has end plates 10 on both sides. The number of end plates 10 may be two, and the two end plates 10 are respectively located on both sides of the liquid cooling plate 20. For example, the two end plates 10 are respectively welded or threaded to the two ends of the liquid cooling plate 20. The liquid cooling plate 20 includes a plurality of panels 21. The number of panels 21 is not limited and is specifically determined according to the size of the battery module. Two adjacent panels 21 are connected, and a plurality of panels 21 can be spliced ​​to form a liquid cooling plate 20. It should be noted that each end plate 10 can be an integrally formed structure, and can also be formed by splicing a plurality of splicing panels.

[0060] refer to Figure 3 and Figure 4 Each panel 21 has a sub-channel 211, and the sub-channel 211 is used for the circulation of liquid cooling medium. Figure 5 and Figure 6 The end plate 10 has a cavity 11 therein, and the cavity 11 is connected to the sub-channel 211 , and the liquid cooling medium in the sub-channel 211 converges or diverges through the cavity 11 .

[0061] For example, refer to Figure 5 and Figure 6 The first cavity 11 is connected to the inlet end of each sub-channel 211, so that the liquid cooling medium flows through the first cavity 11 to the inlet of each sub-channel 211. The second cavity 11 is connected to the outlet end of each sub-channel 211, so that each liquid cooling medium flows through the outlet end of each sub-channel 211 to the second cavity 11. In this way, the liquid cooling medium can flow in the liquid cooling component, so as to facilitate heat exchange between the liquid cooling medium and the battery module, and realize thermal management of the battery module.

[0062] It should be noted that a plurality of heat dissipation fins may be provided in each sub-channel 211 , thereby increasing the heat dissipation area and improving the heat dissipation effect of the liquid cooling component.

[0063] refer to Figure 7 , an isolation cavity 212 is provided in the puzzle board 21. The isolation cavity 212 can be a cavity provided on both sides of the sub-channel 211. The isolation cavity 212 is separated from the sub-channel 211 and is not connected, and the liquid cooling medium in the sub-channel 211 will not flow into the isolation cavity 212. A connector 213 is provided in the isolation cavity 212, and the connector 213 is used to connect the battery module. For example, the battery module can be directly threadedly connected to the connector 213, or the battery module can also be indirectly connected to the connector 213 via a battery module mounting part, which is not limited in the present application. The connector 213 can be a threaded connector such as a screw or a bolt, or can be a snap-on connector such as a snap-on protrusion.

[0064] refer to Figure 8 The isolation cavity 212 may also be in the shape of a T-slot to facilitate the installation of the connector 213. Fig. 9 The isolation cavity 212 may also be disposed above or below the sub-channel 211. This application does not limit this, and the specific location may be determined according to the installation location of the battery module.

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

[0066] It should be noted that the panels 21 may be metal profiles, such as aluminum profiles. The cross-sectional shapes of the panels 21 are all the same, thereby reducing the types of molds for producing the panels 21 and reducing production costs.

[0067] In the liquid cooling assembly provided in the present application, the liquid cooling plate 20 includes a plurality of panels 21, and any two adjacent panels 21 are connected, so that the liquid cooling plate 20 can be expanded along the splicing direction of the panels 21 to improve the versatility of the liquid cooling assembly. The panel 21 has a sub-channel 211, the end plate 10 has a cavity 11, the cavity 11 is connected to the sub-channel 211, and the liquid cooling medium in the sub-channel 211 converges or diverges through the cavity 11, so that the liquid cooling medium can flow in the cavity 11 and the sub-channel 211, so that the liquid cooling medium can exchange heat with the battery module, thereby realizing thermal management of the battery module. By setting an isolation cavity 212 in the panel 21, and having a connector 213 in the isolation cavity 212, the connector 213 can be used to install the battery module, thereby connecting the battery module to the liquid cooling assembly. Since the isolation cavity 212 is separated from the sub-channel 211 , the liquid cooling medium in the sub-channel 211 is prevented from leaking from the installation location of the connector 213 , thereby reducing the risk of leakage of the liquid cooling medium.

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

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

[0070] The module mounting profile 30 has a first connection portion for mounting the battery module, and the first connection portion may be a threaded connection portion, for example, a rivet nut for connecting the battery module is provided on the module mounting profile 30. Thus, the battery module can be indirectly connected to the liquid cooling plate 20 through the module mounting profile 30. Compared with the direct connection between the battery module and the liquid cooling plate 20, the embodiment of the present application can reduce the number of openings on the liquid cooling plate 20 and improve 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 for producing 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 is provided with a water inlet 201 and a water outlet 202. Figure 5 and Figure 6One of the two cavities 11 is connected to the water inlet 201, and the cavity 11 is used for flow diversion. The other cavity 11 is connected to the water outlet 202, and the cavity 11 is used for flow confluence.

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

[0074] In another implementation, reference Figure 5 The cavity 11 for flow diversion is indirectly connected to the water inlet 201 through the connecting channel 217, and the connecting channel 217 is a channel opened in the liquid cooling plate 20. The two ends of the connecting channel 217 are respectively connected to the water inlet 201 and the cavity 11 for flow diversion. The cavity 11 for converging is directly connected to the water outlet 202.

[0075] refer to Figure 2 Along the splicing direction of the panels 21, the water inlet 201 and the water outlet 202 can be respectively arranged on both sides of the extension direction of the liquid cooling plate 20. The extension direction of the liquid cooling plate 20 can be the length direction of the liquid cooling plate 20. Such arrangement makes the water inlet 201 and the water outlet 202 convenient for external piping.

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

[0077] The branch channel 111 is connected to the water inlet 201 . The branch channel 111 has a plurality of branch ports 113 . Each branch port 112 is connected to the inlet end of each sub-channel 211 , so as to divide the liquid cooling medium injected from the water inlet 201 into each sub-channel 211 .

[0078] The confluence channel 112 is connected to the water outlet 202 . The confluence channel 112 has a plurality of confluence ports 114 . Each confluence port 114 is respectively connected to the outlet end of each sub-channel 211 , so that each liquid cooling medium is confluenced into the confluence channel 112 and then flows out through the water outlet 202 .

[0079] In the embodiment of the present application, the size of each branch port 113 and each confluence port 114 can be controlled to enable the liquid cooling plate to achieve better uniform temperature and uniform flow effects.

[0080] In some embodiments, reference Figure 7-Figure 9Each panel 21 has a male plug end 214 and a female plug end 215. The male plug end 214 can be convex, and the female plug end 215 can be grooved. Two adjacent panels 21 are plug-fitted, and the male plug end 214 of the first panel 21 is plug-fitted with the female plug end 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 assembly and the battery pack. The panels 21 in the embodiment of the present application are connected by plugging, which avoids this technical problem and can achieve a lightweight design of the liquid cooling assembly and the battery pack.

[0082] In some embodiments, each panel 21 is welded to the end plate 10. Figure 1 and Fig.12 Each of the four corners of each panel 21 has a welding notch 216. The shape of the welding notch 216 can be a long strip, a nearly long column, a cylindrical shape, or a nearly cylindrical shape, which is not limited in this application. The welding notch 216 can facilitate the welding of the panel 21 and the end plate 10 to avoid welding dead corners. The welding notch 216 is isolated from each sub-channel 211 to prevent the liquid cooling medium from leaking from the welding notch 216.

[0083] Based on the above embodiments, Fig.10 and Fig.11 The end plate 10 also has two relatively arranged limiting bosses 12, which can be bar-shaped protrusions extending toward the liquid cooling plate 20. The liquid cooling plate 20 is clamped between the two limiting protrusions 12, for example, the top and bottom of the liquid cooling plate 20 are respectively against the two limiting protrusions 12. Such a configuration can increase the connection strength between the liquid cooling plate 20 and the end plate 10 and reduce the risk of welding failure between the two.

[0084] In some embodiments, reference Figure 1 and Figure 2 The liquid cooling assembly further includes an expansion unit mounting profile 40, and the expansion unit mounting profile 40 is connected to the liquid cooling plate 20 through a connector 213. For example, the expansion unit mounting profile 40 is connected to the connector 213 by bolts. The expansion unit mounting profile 40 has a second connecting portion, and the second connecting portion is used to connect the 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 may 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] The present application also provides a battery pack, referring to Fig.13 and Fig.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 refer to any of the above embodiments. The battery module 50 is connected to the liquid cooling plate 20 through a connector 213. Since the battery pack provided in the present application includes the liquid cooling assembly in any of the above embodiments, it has at least the beneficial effects in any of the above embodiments, which will not be described one by one here.

[0087] In one possible implementation, reference Fig.13 The arrangement direction of the battery modules is parallel to the splicing direction of the panels in the liquid cooling assembly. Figure 5 .

[0088] In another possible implementation, refer to Fig.14 The arrangement direction of the battery modules is perpendicular to the splicing direction of the panels in the liquid cooling assembly. Figure 6 .

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

[0090] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0091] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

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

[0093] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0095] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description 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 in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid cooling component, characterized in that: It includes a liquid cooling plate and end plates located on both sides of the liquid cooling plate; The liquid cooling plate comprises a plurality of panels, any two adjacent panels are connected, each panel has a sub-flow channel, each end plate has a cavity, the cavity is connected to the sub-flow channel, and the liquid cooling medium in the sub-flow channel converges or diverges through the cavity; The panel also has an isolation cavity, which is separated from the sub-channel, and the isolation cavity has a connector for connecting a battery module.

2. The liquid cooling assembly according to claim 1, characterized in that: The connecting piece is a pre-embedded nut.

3. The liquid cooling assembly according to claim 2, characterized in that: It also includes a module mounting profile, which is connected to the liquid cooling plate through the embedded nut, and has a first connecting portion for mounting a battery module.

4. The liquid cooling assembly according to any one of claims 1 to 3, characterized in that: The liquid cooling plate is provided with a water inlet and a water outlet, one of the two cavities is connected to the water inlet, and the other is connected to the water 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.

5. The liquid cooling assembly according to claim 4, characterized in that: The two cavities are respectively provided with a flow dividing channel and a flow converging channel; The branch channel is connected to the water inlet, and the branch channel has a branch port connected to each of the sub-channels; The confluence channel is communicated with the water outlet, and the confluence channel has a confluence port communicated with each of the sub-flow channels.

6. The liquid cooling assembly according to claim 5, characterized in that: The liquid cooling plate has a connecting channel, one end of the connecting channel is connected to the water inlet, and the other end of the connecting channel is connected to the cavity having the branch channel.

7. The liquid cooling assembly according to any one of claims 1 to 3, characterized in that: Each of the panels has a male plug-in end and a female plug-in end; The male plug-in end of the panel is plugged into and matched with the female plug-in end of another panel.

8. The liquid cooling assembly according to any one of claims 1 to 3, characterized in that: Each of the panels is welded to the end plate, and welding notches are provided at the four corners of the panels, and the welding notches are isolated from the sub-flow channels.

9. The liquid cooling assembly according to claim 5, characterized in that: The end plate has two limiting bosses arranged opposite to each other, and the liquid cooling plate is clamped between the two limiting bosses.

10. The liquid cooling assembly according to any one of claims 1 to 3, characterized in that: The liquid cooling assembly further includes an expansion unit mounting profile, the expansion unit mounting profile is connected to the liquid cooling plate via the connector, and the expansion unit mounting profile has a second connecting portion.

11. A battery pack, characterized in that: It comprises a battery module and a liquid cooling assembly as described in any one of claims 1 to 10, wherein the battery module is mounted on a liquid cooling plate of the liquid cooling assembly through a connector in the liquid cooling assembly.

12. The battery pack according to claim 11, characterized in that: The arrangement direction of the battery modules is parallel to the splicing direction of the panels in the liquid cooling assembly; Alternatively, the arrangement direction of the battery modules is perpendicular to the splicing direction of the panels in the liquid cooling assembly.

Images