Liquid cooling assembly, battery module and battery pack

Abstract

The utility model belongs to a liquid cooling assembly, a battery module and a battery pack in the technical field of power batteries. The liquid cooling assembly comprises a cold plate group which comprises at least two liquid cooling plates, an accommodating space is formed between the adjacent liquid cooling plates, and cooling channels are arranged in the liquid cooling plates; the head end and the tail end of each liquid cooling plate are respectively provided with an independent current collector, a current collecting channel is arranged in each current collector, and the current collecting channels are communicated with the cooling channels in the corresponding liquid cooling plates; the head ends and the tail ends of the plurality of liquid cooling plates of the same cold plate group are directly assembled and connected through a plurality of corresponding current collectors, and the current collecting channels of the plurality of current collectors connected with at least one end are communicated. The independent current collectors are arranged at the head end and the tail end of each liquid cooling plate, so that the liquid cooling plates can be mounted in sequence to reduce the assembly difficulty, pipelines can be shared, the on-off of cooling channels among the liquid cooling plates can be flexibly arranged, and the requirement for diversification of the flowing direction of a cooling medium is met.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, and in particular relates to a liquid cooling component, battery module and battery pack. Background Technology

[0002] Liquid cooling modules, as crucial components of batteries, play a vital role in heat exchange. During battery assembly, the cold plates of the liquid cooling module are connected by current collectors to form a liquid cooling circuit. The assembly of the cold plates is completed before the installation of individual battery cells. Because the cold plates are already assembled before the installation of the battery cells, especially when the spacing between the cold plates is small, the subsequent assembly of the battery cells is more difficult. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a liquid cooling component, a battery module and a battery pack to solve the problems of small cold plate spacing and difficult assembly in the prior art.

[0004] To achieve the above and other related objectives, this utility model provides a liquid cooling assembly, comprising:

[0005] A cold plate assembly, comprising at least two liquid cooling plates distributed along a first direction, wherein an accommodating space for accommodating a battery cell is formed between adjacent liquid cooling plates, and a cooling channel for conveying a cooling medium is provided within the liquid cooling plate.

[0006] Each liquid cooling plate has an independent current collector at its first and last ends. The current collector has a current collection channel, which is connected to the cooling channel in the corresponding liquid cooling plate.

[0007] In this configuration, the first and last ends of the multiple liquid cooling plates in the same cold plate group are directly connected by a plurality of corresponding current collectors, and the current collection channels between the multiple current collectors connected at least one end are interconnected.

[0008] Optionally, two adjacent current collectors connected by the current collection channel are fitted together and sealed with a sealing ring.

[0009] Optionally, the plurality of collectors connected by the collection channels are arranged along the first direction, and the sealing ring is located between two adjacent collectors and is adapted to be deformed under pressure when the two adjacent collectors are assembled and connected along the first direction to seal and connect the two collection channels.

[0010] Optionally, the multiple current collectors corresponding to the same cold plate group and assembled and connected along the first direction are fixed by bolts, rivets, welding or adhesive.

[0011] Optionally, the cooling channels in the multiple liquid cooling plates of the same cold plate group are arranged in parallel, and the liquid inlet end of the cooling channel in the multiple liquid cooling plates is connected to the flow collection channel in the multiple current collectors corresponding to the first end of the multiple liquid cooling plates, and the liquid outlet end of the cooling channel in the multiple liquid cooling plates is connected to the flow collection channel in the multiple current collectors corresponding to the tail end of the multiple liquid cooling plates.

[0012] Optionally, the two current collectors located at the beginning and end of the same liquid cooling plate are respectively provided with a liquid inlet and a liquid outlet; or, the current collector located at the beginning of one of the liquid cooling plates is provided with a liquid inlet, and the current collector located at the end of the other liquid cooling plate is provided with a liquid outlet.

[0013] Optionally, the flow channels in the two current collectors corresponding to the first ends of two adjacent liquid cooling plates in the same cold plate group are separated, while the flow channels between the two current collectors corresponding to the last ends are connected. One of the two adjacent current collectors separated by the flow channels is provided with a liquid inlet, and the other current collector is provided with a liquid outlet.

[0014] Optionally, the cooling channels in two adjacent liquid cooling plates in the same cold plate group are connected through the flow collection channel to form a U-shaped flow path.

[0015] Optionally, the inlet and outlet ends of the cooling channels in the multiple liquid cooling plates of the same cold plate group are located at the beginning of the liquid cooling plate. The flow collection channels in the multiple current collectors corresponding to the beginning ends of the multiple liquid cooling plates are connected, while the flow collection channels between the multiple current collectors corresponding to the end ends are separated. The current collector corresponding to the beginning end of the liquid cooling plate is provided with two mutually separated flow collection channels, and one of the flow collection channels is connected to the inlet end of the cooling channels in the multiple liquid cooling plates, and the other flow collection channel is connected to the outlet end of the cooling channels in the multiple liquid cooling plates.

[0016] Optionally, one of the interconnected collectors is provided with an inlet port and an outlet port, the inlet port and the outlet port being respectively connected to two collection channels on the same collector; or, one of the interconnected collectors is provided with an inlet port, another collector is provided with an outlet port, and the inlet port is connected to the collection channel connected to the inlet end of the cooling channel, and the outlet port is connected to the collection channel connected to the outlet end of the cooling channel.

[0017] Optionally, the cooling channel has a U-shaped cross-section.

[0018] Optionally, the number of cold plate groups is multiple and they are distributed and connected in parallel along the first direction. The liquid inlet ports corresponding to the multiple cold plate groups are connected to the same liquid inlet pipe, and the liquid outlet ports corresponding to the multiple cold plate groups are connected to the same liquid outlet pipe.

[0019] Optionally, the liquid cooling plate is a serpentine plate or a straight plate.

[0020] To achieve the above and other related objectives, this utility model also provides a battery module, including the liquid cooling component as described above.

[0021] To achieve the above and other related objectives, this utility model also provides a battery pack, including the liquid cooling component as described above.

[0022] As described above, the liquid cooling assembly, battery module, and battery pack of this utility model have at least the following beneficial effects: each liquid cooling plate has an independent current collector at both ends, and each liquid cooling plate can be set independently so that each liquid cooling plate can be installed in place one after another and then directly assembled and connected, which is simple and convenient and helps to reduce assembly difficulty; in addition, each liquid cooling plate has an independent current collector at both ends, which not only facilitates the sharing of pipelines and simplifies the structure, but also makes it easy to flexibly arrange the opening and closing of the cooling channels between multiple liquid cooling plates according to the needs, thereby helping to meet the needs of diverse cooling medium flow directions. Attached Figure Description

[0023] Figure 1 This is a partial structural schematic diagram of Embodiment 1 of the liquid cooling component of this utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the liquid cooling assembly when it contains the battery cells;

[0025] Figure 3 for Figure 2 Front view of the liquid cooling assembly;

[0026] Figure 4 for Figure 3 Sectional view at point AA;

[0027] Figure 5 for Figure 3 Sectional view at point BB;

[0028] Figure 6 for Figure 3 Sectional view at CC;

[0029] Figure 7 for Figure 3 Sectional view at point DD;

[0030] Figure 8 for Figure 2 Top view of the liquid cooling assembly;

[0031] Figure 9 for Figure 8 Sectional view at EE;

[0032] Figure 10 This is a partial structural schematic diagram of Embodiment 2 of the liquid cooling component of this utility model;

[0033] Figure 11 for Figure 10 A schematic diagram of the structure of the liquid cooling assembly when it contains the battery cells;

[0034] Figure 12 for Figure 11 Front view of the liquid cooling assembly;

[0035] Figure 13 for Figure 12 Sectional view at FF;

[0036] Figure 14 for Figure 12 Sectional view at point GG;

[0037] Figure 15 for Figure 12 Sectional view at HH;

[0038] Figure 16 for Figure 11 Top view of the liquid cooling assembly;

[0039] Figure 17 for Figure 16 Sectional view at point II;

[0040] Figure 18 for Figure 16 A cross-sectional view at point JJ;

[0041] Figure 19 This is a partial structural schematic diagram of Embodiment 3 of the liquid cooling component of this utility model;

[0042] Figure 20 for Figure 19 A schematic diagram of the structure of the liquid cooling assembly when it contains the battery cells;

[0043] Figure 21 for Figure 20 Front view of the liquid cooling assembly;

[0044] Figure 22 for Figure 21 Sectional view at point KK;

[0045] Figure 23 for Figure 21Sectional view at LL;

[0046] Figure 24 for Figure 21 Sectional view at point MM;

[0047] Figure 25 for Figure 20 Top view of the liquid cooling assembly;

[0048] Figure 26 for Figure 19 Front view of the liquid cooling assembly;

[0049] Figure 27 for Figure 26 A cross-sectional view at point NN.

[0050] Part Number Explanation

[0051] Cold plate assembly 1, liquid cooling plate 11, cooling channel 111, accommodating space 12, current collector 2, current collector channel 21, connecting port 211, liquid inlet port 22, liquid outlet port 23, sealing ring 3, liquid inlet connector 4, liquid outlet connector 5, liquid inlet pipe 6, liquid outlet pipe 7, battery cell 8, connecting and fixing structure 9. Detailed Implementation

[0052] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0053] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0054] See Figures 1 to 27 In some optional embodiments, this application provides a battery module including a liquid cooling component. In addition to the liquid cooling component, the battery module may also include a battery cell 8. The battery cell 8 includes a cylindrical cell, a prismatic cell, or a pouch cell.

[0055] See Figures 1 to 27In some optional embodiments, this application provides a battery pack including a liquid cooling assembly. In addition to the liquid cooling assembly, the battery pack may also include battery cells 8; wherein, the battery cells 8 include cylindrical cells, prismatic cells, or pouch cells.

[0056] See Figures 1 to 11 , Figure 19 , Figure 20 , Figure 26 and Figure 27 In some optional embodiments, the liquid cooling assembly provided in this application includes a cold plate group 1 and a current collector 2. In addition to the components mentioned above, the liquid cooling assembly may also include an inlet connector 4 and / or an outlet connector 5 and / or an inlet pipe 6 and / or an outlet pipe 7. The number of cold plate groups 1 is one or more. Each cold plate group 1 includes at least two liquid cooling plates 11 distributed along a first direction. Adjacent liquid cooling plates 11 form a receiving space 12 for accommodating the battery cell 8, and each liquid cooling plate 11 has a cooling channel 111 for conveying the cooling medium. Each liquid cooling plate 11 has an independent current collector 2 at its head and tail ends. That is, one current collector 2 is only provided on one liquid cooling plate 11, so that each liquid cooling plate 11 can be installed independently and sequentially, resulting in flexible assembly and low installation difficulty. The current collector 2 has a current collection channel 21, which communicates with the cooling channel 111 in the corresponding liquid cooling plate 11. The liquid cooling plate 11 has two ends distributed along a second direction, one end being the head end and the other end being the tail end. The first and last ends of multiple liquid cooling plates 11 in the same cold plate group 1 are directly connected to each other via corresponding multiple current collectors 2. The connection is simple and convenient, and the current collection channels 21 between at least one end of the multiple current collectors 2 are connected. Specifically, the multiple current collectors 2 located at the first end of the multiple liquid cooling plates 11 in the same cold plate group 1 are directly connected to connect the first ends of the multiple liquid cooling plates 11, and the multiple current collectors 2 located at the last end of the multiple liquid cooling plates 11 in the same cold plate group 1 are directly connected to connect the last ends of the multiple liquid cooling plates 11. At least one end of the first and last ends of the multiple liquid cooling plates 11 in the same group is connected, and the connection is achieved by directly connecting them through the current collection channels 21 in the current collectors 2.

[0057] In this application, the arrangement direction of the interconnected current collectors 2, the arrangement direction of the multiple liquid cooling plates 11, and the first direction are the same, which is the Y direction in the figure; the length of the liquid cooling plate 11 is the same as the second direction, which is the X direction in the figure; the height direction of the liquid cooling plate 11 is the Z direction in the figure.

[0058] Optional, see Figure 1 and Figure 4The current collectors 2 can be connected and fixed to each other through the connecting and fixing structure 9. Furthermore, multiple current collectors 2 that correspond to the same cold plate group 1 and are assembled and connected along the first direction can be connected and fixed by bolts, rivets, welding, adhesive or other fixing methods, and the connection is firm and reliable.

[0059] Optionally, the liquid cooling plate 11 is a serpentine plate, which is suitable for cooling cylindrical cells. The serpentine plate is easy to fit against the side wall of the cylindrical cell, which helps to improve the cooling effect.

[0060] Optionally, the liquid cooling plate 11 is a straight plate, which is suitable for cooling square-shell cells or soft-pack cells. The straight plate is easy to fit with square-shell cells or soft-pack cells, which helps to improve the cooling effect.

[0061] Optional, see Figure 5 The two adjacent collectors 2 connected by the collection channel 21 are fitted together and sealed by the sealing ring 3, providing a good sealing effect and helping to prevent the cooling medium from leaking out from the connection of the two collectors 2 through the collection channel 21. Furthermore, the multiple collectors 2 connected by the collection channel 21 are arranged along a first direction, and the sealing ring 3 is located between two adjacent collectors 2. It is adapted to be deformed under pressure when the two adjacent collectors 2 are assembled and connected along the first direction to seal the connection between the two collection channels 21. This structural design allows for a sealed connection between the collection channels 21 when adjacent liquid cooling plates 11 are assembled and connected, making the assembly operation simple and convenient, and ensuring reliable sealing. Each of the two connected collection channels 21 has aligned and connected connecting ports 211 on its sidewall. The two collection channels 21 are directly connected through the corresponding connecting ports 211. The number of connecting ports 211 can be set according to requirements and is not limited here.

[0062] Optionally, the current collector 2 is provided with an inlet port 22 and / or an outlet port 23 communicating with the current collection channel 21. The inlet port 22 is connected to the inlet pipe 6 through an inlet connector 4, and the outlet port 23 is connected to the outlet pipe 7 through an outlet connector 5. Furthermore, when there are multiple cold plate groups 1, the multiple cold plate groups 1 are distributed along the first direction and connected in parallel, resulting in uniform cooling. The inlet ports 22 corresponding to the multiple cold plate groups 1 are connected to the same inlet pipe 6, and the outlet ports 23 corresponding to the multiple cold plate groups 1 are connected to the same outlet pipe 7. This facilitates the sharing of the inlet pipe 6 and the outlet pipe 7, thereby simplifying the structure, saving space, and reducing costs.

[0063] Each liquid cooling plate 11 has an independent current collector 2 at its first and last ends, so that each liquid cooling plate 11 can be installed independently and sequentially during the assembly process, making the assembly simple and flexible. For example, the first liquid cooling plate 11 located on the edge side in the first direction can be installed first, then the battery cell 8 can be installed, then the second liquid cooling plate 11 can be assembled, and then the second liquid cooling plate 11 can be connected to the first liquid cooling plate 11 to clamp the battery cell 8 between the two liquid cooling plates 11, and so on.

[0064] In the liquid cooling assembly of the above embodiment, since each liquid cooling plate 11 has an independent current collector at its first and last ends, the assembly sequence of each liquid cooling plate 11 is flexible. This allows the first liquid cooling plate 11 of two adjacent liquid cooling plates 11 forming the accommodating space 12 for the battery cell 8 to be installed before the battery cell 8 is installed, and the second liquid cooling plate 11 to be installed after the battery cell 8 is installed and then connected to the first liquid cooling plate 11 to clamp the battery cell 8. This helps avoid the problem of difficulty in installing the battery cell 8 due to the small distance between the two liquid cooling plates 11, reducing assembly difficulty and improving assembly efficiency. Furthermore, the independent current collector 2 at the first and last ends of each liquid cooling plate 11 facilitates the sharing of the inlet connector 4 and outlet connector 5, simplifying the piping and structure, reducing costs, and allowing for flexible setting of the flow direction of the cooling medium within the liquid cooling plate 11 through the cooperation between the corresponding current collectors 2, in order to meet different cooling requirements.

[0065] See Figures 1 to 9 In some optional embodiments, the cooling channels in the multiple liquid cooling plates 11 of the same cold plate group 1 are arranged in parallel, and the liquid inlet end of the cooling channel in the multiple liquid cooling plates 11 is connected through the flow collection channel 21 in the multiple current collectors 2 corresponding to the head end of the multiple liquid cooling plates 11, and the liquid outlet end of the cooling channel in the multiple liquid cooling plates 11 is connected through the flow collection channel 21 in the multiple current collectors 2 corresponding to the tail end of the multiple liquid cooling plates 11.

[0066] Optionally, the liquid cooling plate 11 is provided with multiple cooling channels, which are distributed and connected in parallel along the height direction of the liquid cooling plate 11. Further, the cooling channels can be direct current channels extending along the length direction of the liquid cooling plate 11.

[0067] Optionally, two current collectors 2 located at the beginning and end of the same liquid cooling plate 11 are respectively provided with a liquid inlet 22 and a liquid outlet 23. That is, the liquid inlet 22 and the liquid outlet 23 are respectively provided on two current collectors 2 connected to the same liquid cooling plate 11 and distributed at both ends of the liquid cooling plate 11. Alternatively, a liquid inlet 22 is provided on the current collector 2 located at the beginning of one of the liquid cooling plates 11, and a liquid outlet 23 is provided on the current collector 2 located at the end of the other liquid cooling plate 11. That is, the liquid inlet 22 and the liquid outlet 23 are respectively provided on the current collectors 2 at different ends of the two liquid cooling plates 11.

[0068] In this embodiment, the cooling medium enters from the inlet pipe 6, flows sequentially through the inlet connector 4, the collector 2 located at the first end of the liquid cooling plate 11, the inlet end of the liquid cooling plate 11, the outlet end of the liquid cooling plate 11, the collector 2 located at the tail end of the liquid cooling plate 11, and the outlet connector 5, and is then output from the outlet pipe 7.

[0069] In the liquid cooling assembly of the above embodiment, multiple cooling channels in the multiple liquid cooling plates 11 of the same cold plate group 1 are arranged in parallel, so that the cooling medium in each cooling channel can flow in the same direction, which is suitable for the cooling medium to enter from one end and exit from the other end, and can share the liquid inlet connector 4 and liquid outlet connector 5, which simplifies the structure, helps to reduce costs, has a compact layout, and helps to improve space utilization.

[0070] See Figures 10 to 18 In some optional embodiments, the flow channels 21 in the two current collectors 2 corresponding to the first ends of two adjacent liquid cooling plates 11 of the same cold plate group 1 are separated, and the flow channels 21 between the two current collectors 2 corresponding to the tail ends are connected. One of the two adjacent current collectors 2 separated by the flow channels 21 is provided with a liquid inlet port 22, and the other current collector 2 is provided with a liquid outlet port 23.

[0071] Optionally, the cooling channels in the liquid cooling plate 11 can be direct current channels extending along the length of the liquid cooling plate 11. The cooling channels in two adjacent liquid cooling plates 11 in the same cold plate group 1 are connected by the flow collection channels 21 in the two current collectors 2 located at the tail ends of the two liquid cooling plates 11 to form a U-shaped flow path. That is, the cooling channels in two adjacent liquid cooling plates 11 can be connected in series, and the flow direction of the cooling medium in the two adjacent liquid cooling plates 11 is opposite.

[0072] In this embodiment, the cooling medium enters from the inlet pipe 6, flows sequentially through the inlet connector 4 and the collector 2 on the first end of one of the liquid cooling plates 11, then enters from the collector 2 on the tail end of the liquid cooling plate 11 to the collector 2 on the tail end of another liquid cooling plate 11, and then flows out from the collector 2 on the first end of the other liquid cooling plate 11 to the outlet connector 5 and is output through the outlet pipe 7. This extends the flow path of the cooling medium and helps to improve the utilization rate of the cooling medium.

[0073] In the liquid cooling assembly of the above embodiment, the corresponding cooling channels in two adjacent liquid cooling plates 11 of the same cold plate group 1 are connected in series, so that the cooling medium in the cooling channels of the two adjacent liquid cooling plates 11 can flow in opposite directions, which is suitable for the cooling medium to enter and exit from the same end, so that the liquid inlet connector 4, liquid outlet connector 5, liquid inlet pipe 6 and liquid outlet pipe 7 are distributed at the same end of the liquid cooling plate 11, which is compact and helps to improve space utilization.

[0074] See Figures 19 to 27 In some optional embodiments, the inlet and outlet ends of the cooling channels 111 in the multiple liquid cooling plates 11 of the same cold plate group 1 are both located at the head end of the liquid cooling plate 11. The collection channels 21 in the multiple current collectors 2 corresponding to the head ends of the multiple liquid cooling plates 11 are connected, while the collection channels 21 between the multiple current collectors 2 corresponding to the tail ends are separated. The current collector 2 corresponding to the head end of the liquid cooling plate 11 is provided with two mutually separated collection channels 21, and one collection channel 21 is connected to the inlet end of the cooling channels 111 in the multiple liquid cooling plates 11, and the other collection channel 21 is connected to the outlet end of the cooling channels 111 in the multiple liquid cooling plates 11.

[0075] Optionally, one of the multiple interconnected current collectors 2 is provided with an inlet port 22 and an outlet port 23, and the inlet port 22 and the outlet port 23 are respectively connected to two current collection channels 21 on the same current collector 2.

[0076] Optionally, one of the multiple interconnected collectors 2 is provided with a liquid inlet 22, and the other collector 2 is provided with a liquid outlet 23. The liquid inlet 22 is connected to the collection channel 21 which is connected to the liquid inlet end of the cooling channel 111, and the liquid outlet 23 is connected to the collection channel 21 which is connected to the liquid outlet end of the cooling channel 111.

[0077] Optionally, the inlet and outlet ends of the cooling channel 111 are located at the same end of the liquid cooling plate 11. For example, the inlet end of the cooling channel 111 is located at the beginning end of the liquid cooling plate 11, and the outlet end of the cooling channel 111 extends along the length of the liquid cooling plate 11 to the end of the liquid cooling plate 11, then turns around and extends in the opposite direction along the length of the liquid cooling plate 11 to the beginning end of the liquid cooling plate 11. Specifically, the cross-section of the cooling channel 111 is U-shaped.

[0078] In this embodiment, the cooling medium enters from the inlet pipe 6, flows sequentially through the inlet connector 4, a flow channel 21 in the flow collector 2 at the beginning of the liquid cooling plate 11, and the flow collector 2 at the end of the liquid cooling plate 11, then turns around and flows into the outlet connector 5 from another flow channel 21 in the flow collector 2 at the beginning of the liquid cooling plate 11, and is then output from the outlet pipe 7.

[0079] In the liquid cooling assembly of the above embodiment, multiple cooling channels 111 within multiple liquid cooling plates 11 of the same cold plate group 1 are arranged in parallel, and can share the liquid inlet connector 4 and liquid outlet connector 5, which simplifies the structure and helps to reduce costs. In addition, the cooling medium can turn around and reverse within the cooling channel 111, which is suitable for the cooling medium to enter and exit from the same end, so that the liquid inlet connector 4, liquid outlet connector 5, liquid inlet pipe 6 and liquid outlet pipe 7 are distributed at the same end of the liquid cooling plate 11, resulting in a compact layout and improving space utilization.

[0080] In the description of this specification, the references to terms such as "this embodiment," "example," and "specific example" 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 the present invention. 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.

[0081] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A liquid cooling assembly, characterized in that, include: A cold plate assembly, comprising at least two liquid cooling plates distributed along a first direction, wherein an accommodating space for accommodating a battery cell is formed between adjacent liquid cooling plates, and a cooling channel for conveying a cooling medium is provided within the liquid cooling plate. Each liquid cooling plate has an independent current collector at its first and last ends. The current collector has a current collection channel, which is connected to the cooling channel in the corresponding liquid cooling plate. In this configuration, the first and last ends of the multiple liquid cooling plates in the same cold plate group are directly connected by a plurality of corresponding current collectors, and the current collection channels between the multiple current collectors connected at least one end are interconnected.

2. The liquid cooling assembly according to claim 1, characterized in that, The two adjacent collectors connected by the collector channel are fitted together and sealed with a sealing ring.

3. The liquid cooling assembly according to claim 2, characterized in that, The multiple collectors connected by the collection channels are arranged along the first direction. The sealing ring is located between two adjacent collectors and is adapted to be deformed under pressure when the two adjacent collectors are assembled and connected along the first direction to seal and connect the two collection channels.

4. The liquid cooling assembly according to claim 1, characterized in that, The multiple current collectors corresponding to the same cold plate group and assembled and connected along the first direction are fixed by bolts, rivets, welding or adhesive.

5. The liquid cooling assembly according to claim 1, characterized in that, The cooling channels in the multiple liquid cooling plates of the same cold plate group are arranged in parallel, and the liquid inlet end of the cooling channel in the multiple liquid cooling plates is connected through the flow collection channel in the multiple current collectors corresponding to the first end of the multiple liquid cooling plates, and the liquid outlet end of the cooling channel in the multiple liquid cooling plates is connected through the flow collection channel in the multiple current collectors corresponding to the tail end of the multiple liquid cooling plates.

6. The liquid cooling assembly according to claim 5, characterized in that, Two current collectors located at the beginning and end of the same liquid cooling plate are respectively provided with a liquid inlet and a liquid outlet; or, a current collector located at the beginning of one of the liquid cooling plates is provided with a liquid inlet, and a current collector located at the end of the other liquid cooling plate is provided with a liquid outlet.

7. The liquid cooling assembly according to claim 1, characterized in that, The flow channels in the two current collectors corresponding to the first ends of two adjacent liquid cooling plates in the same cold plate group are separated, while the flow channels between the two current collectors corresponding to the last ends are connected. One of the two adjacent current collectors separated by the flow channels is provided with a liquid inlet, and the other current collector is provided with a liquid outlet.

8. The liquid cooling assembly according to claim 7, characterized in that, The cooling channels in two adjacent liquid cooling plates in the same cold plate group are connected through the flow collection channel to form a U-shaped flow path.

9. The liquid cooling assembly according to claim 1, characterized in that, The inlet and outlet ends of the cooling channels in the multiple liquid cooling plates of the same cold plate group are located at the beginning of the liquid cooling plate. The flow collection channels in the multiple current collectors corresponding to the beginning ends of the multiple liquid cooling plates are connected, while the flow collection channels between the multiple current collectors corresponding to the end ends are separated. The current collector corresponding to the beginning end of the liquid cooling plate is provided with two mutually separated flow collection channels, one of which is connected to the inlet end of the cooling channel in the multiple liquid cooling plates, and the other flow collection channel is connected to the outlet end of the cooling channel in the multiple liquid cooling plates.

10. The liquid cooling assembly according to claim 9, characterized in that, One of the plurality of interconnected current collectors is provided with an inlet port and an outlet port, the inlet port and the outlet port being respectively connected to two flow collection channels on the same current collector; or, one of the plurality of interconnected current collectors is provided with an inlet port, another current collector is provided with an outlet port, and the inlet port is connected to the flow collection channel connected to the inlet end of the cooling channel, and the outlet port is connected to the flow collection channel connected to the outlet end of the cooling channel.

11. The liquid cooling assembly according to claim 9, characterized in that, The cooling channel has a U-shaped cross-section.

12. The liquid cooling assembly according to claim 6, 7, or 10, characterized in that, The number of cold plate groups is multiple and they are distributed and connected in parallel along the first direction. The liquid inlet ports corresponding to the multiple cold plate groups are connected to the same liquid inlet pipe, and the liquid outlet ports corresponding to the multiple cold plate groups are connected to the same liquid outlet pipe.

13. The liquid cooling assembly according to claim 1, characterized in that, The liquid cooling plate is either a serpentine plate or a straight plate.

14. A battery module, characterized in that, Includes the liquid cooling assembly as described in any one of claims 1 to 13.

15. A battery pack, characterized in that, Includes the liquid cooling assembly as described in any one of claims 1 to 13.

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