Liquid cooling plate, battery pack and vehicle

Abstract

The utility model relates to the technical field of battery packs, aims to solve the technical problems that some known liquid cooling plates are insufficient in bearing capacity and poor in heat dissipation effect, and provides a liquid cooling plate, a battery pack and a vehicle. The liquid cooling plate comprises a first plate piece, a second plate piece and a runner plate. The first plate is provided with a liquid inlet and a liquid outlet. The runner plate is provided with a first side face and a second side face which are opposite in the thickness direction. A first runner groove is formed in the first side face, a first runner is defined by the first runner groove and the first plate, the first runner is provided with a first starting end and a first tail end, the liquid inlet is communicated with the first starting end, and the first tail end is communicated with the liquid outlet. The second side face is provided with a second runner groove, the second side face is attached to the second plate, the second runner groove and the second plate define a second runner, the second runner is provided with a second starting end and a second tail end, the second starting end is communicated with the first starting end, and the second tail end is communicated to the first tail end. The liquid cooling plate has the beneficial effects that the bearing capacity and the heat dissipation effect of the liquid cooling plate are improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and more specifically, to a liquid cooling plate, a battery pack, and a vehicle. Background Art

[0002] Some existing battery packs use liquid cooling plates to support and dissipate heat from the batteries. Conventional liquid cooling plates consist of a flow channel plate and a flat plate, with a flow channel formed between the two plates, through which a cooling medium flows. However, existing liquid cooling plates suffer from insufficient load-bearing capacity and poor heat dissipation. Utility Model Content

[0003] The present application provides a liquid cooling plate, a battery pack, and a vehicle to solve the technical problems of insufficient load-bearing capacity and poor heat dissipation effect of some known liquid cooling plates.

[0004] In the first aspect, the present application provides a liquid cooling plate, comprising a first plate, a second plate and a flow channel plate. The first plate is provided with a liquid inlet and a liquid outlet, the liquid inlet is used to introduce a cooling medium, and the liquid outlet is used to discharge the cooling medium. The flow channel plate has a first side surface and a second side surface opposite to each other in the thickness direction. The first side surface is provided with a first flow channel groove, the first side surface is attached to the first plate, the first flow channel groove and the first plate form a first flow channel, the first flow channel has a first starting end and a first end, the liquid inlet is connected to the first starting end, and the first end is connected to the liquid outlet. The second side surface is provided with a second flow channel groove, the second side surface is attached to the second plate, the second flow channel groove and the second plate form a second flow channel, the second flow channel has a second starting end and a second end, the second starting end is connected to the first starting end, and the second end is connected to the first end.

[0005] The liquid cooling plate of the present application can simultaneously deliver the cooling medium into the first flow channel and the second flow channel, thereby increasing the capacity of the cooling medium, thereby improving the heat dissipation performance of the liquid cooling plate, meeting the heat dissipation requirements of battery modules of different powers, reducing the operating temperature of the battery module and the battery pack, ensuring the safety performance of the battery module and the battery pack, and further improving the energy density of the battery module and the battery pack. At the same time, the coordination of the first plate, the second plate and the flow channel plate can further improve the strength of the liquid cooling plate and improve the load-bearing capacity of the liquid cooling plate. In addition, the liquid inlet and the liquid outlet are both arranged on the first plate, which can improve the assembly convenience of the liquid cooling plate and the cooling medium circulation device (such as the pump body). Moreover, since the first plate and the second plate of the liquid cooling plate both have heat exchange performance, the liquid cooling plate can be arranged between two adjacent layers of battery modules, which can reduce the height of the battery pack and improve the scope of application of the liquid cooling plate.

[0006] In one possible implementation:

[0007] The flow channel plate includes a first plate wall, which is attached to the first plate component. The first plate wall protrudes downward along the thickness direction of the flow channel plate to form a plurality of protrusions, and the plurality of protrusions are spaced apart, and the second flow channel groove is constructed between two adjacent protrusions; the protrusion includes a second plate wall and a side wall, and the second plate wall is attached to the second plate component; the second plate wall and the first plate wall are spaced apart along the thickness direction of the flow channel plate, and the side wall is connected between the second plate wall and the first plate wall, and the first flow channel groove is surrounded by the side wall and the second plate wall.

[0008] In one possible implementation:

[0009] The first flow channel groove includes a first liquid inlet groove and a plurality of front cooling grooves, the first liquid inlet groove is located at the first starting end of the first flow channel groove, the outer protrusion includes a liquid inlet outer protrusion, the liquid inlet outer protrusion includes a liquid inlet side wall, the liquid inlet side wall and the first plate constitute the first liquid inlet groove, the liquid inlet side wall and the second plate constitute the second starting end of the second flow channel groove; the liquid inlet side wall is provided with a first connecting hole, the first connecting hole connects the first liquid inlet groove and the second starting end; the plurality of front cooling grooves all include a first input end and a first output end, the plurality of first input ends are respectively connected to the first liquid inlet groove at intervals, and the plurality of first output ends are connected to the liquid outlet.

[0010] In one possible implementation:

[0011] There are two first flow channel grooves, and the two first flow channel grooves are symmetrical about a symmetry plane. The symmetry plane is a plane perpendicular to the width direction of the liquid cooling plate and parallel to the thickness direction of the liquid cooling plate. The first liquid inlet grooves of the two first flow channel grooves are connected; the flow channel plate is also provided with a liquid inlet groove on the first side surface, and the liquid inlet groove is connected to the first liquid inlet groove of one of the first flow channel grooves. In the thickness direction of the flow channel plate, the liquid inlet groove corresponds to the liquid inlet.

[0012] In one possible implementation:

[0013] The second flow channel groove includes a second liquid inlet groove, a first parallel groove and a plurality of reverse cooling grooves. The second liquid inlet groove is adjacent to the first parallel groove along the thickness direction of the flow channel plate. The second liquid inlet groove is located at the second starting end of the second flow channel groove. One end of the second liquid inlet groove is connected to the first starting end, and the other end of the second liquid inlet groove is connected to the first parallel groove. A second connecting hole is opened on the side wall, and the second connecting hole is connected between the first end and the second end. The plurality of reverse cooling grooves respectively have a second input end and a second output end. The plurality of second input ends are connected to the first parallel groove. The plurality of second input ends are spaced apart along the length direction of the first parallel groove, and the plurality of second output ends are all connected to the second end.

[0014] In one possible implementation:

[0015] The second plate is provided with a plurality of through holes, and the plurality of through holes penetrate the second plate along the thickness direction of the flow channel plate, and the plurality of through holes respectively correspond to the second input ends of the plurality of reverse cooling grooves; the liquid cooling plate also includes a third plate, and the third plate is provided on the side of the second plate away from the first plate, and the third plate is protruded outwardly in the direction away from the first plate to form the first parallel grooves, and the third plate corresponds to the plurality of through holes along the thickness direction of the liquid cooling plate, so that the first parallel grooves are connected to the plurality of second input ends through the plurality of through holes.

[0016] In one possible implementation:

[0017] The second flow channel groove also includes a second parallel groove, which is adjacent to the plurality of reverse cooling grooves along the thickness direction of the flow channel plate, and the plurality of second output ends are connected to the second parallel grooves at intervals along the length direction of the second parallel grooves; the outer protrusion includes a discharge outer protrusion, which defines a discharge groove, one end of the discharge groove is connected to the first end of the first flow channel groove, and the other end of the discharge groove corresponds to the liquid outlet along the thickness direction of the liquid cooling plate.

[0018] In one possible implementation:

[0019] The first flow channel groove includes a plurality of front cooling grooves, each of the front cooling grooves corresponds to a reverse cooling groove, and the plurality of front cooling grooves have a first output end, one of the front cooling grooves is a converging cooling groove, and the discharge groove is connected to the first output end of the converging cooling groove; the outer protrusion includes a plurality of cooling outer protrusions, and the plurality of cooling outer protrusions are spaced apart, and each of the cooling outer protrusions includes a cooling outer wall, one side of the cooling outer wall forms a side surface of the front cooling groove, and the other side of the cooling outer wall forms a side surface of the reverse cooling groove, and the cooling outer wall is provided with a second connecting hole, and the second connecting hole is located at the first output end, and the second connecting hole connects the front cooling groove and the reverse cooling groove, and the second connecting hole is also connected to the second parallel groove.

[0020] In a second aspect, the present application provides a battery pack, comprising a battery module and the aforementioned liquid cooling plate, wherein the liquid cooling plate is in heat exchange with the battery module.

[0021] In a third aspect, the present application provides a vehicle comprising the aforementioned liquid cooling plate and / or battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0024] Figure 2 This is a schematic structural diagram of a battery pack according to an embodiment of the present application.

[0025] Figure 3 Schematic diagram of the structure of a liquid cooling plate according to an embodiment of the present application.

[0026] Figure 4 This is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present application from another perspective.

[0027] Figure 5 Schematic diagram of the exploded structure of a liquid cooling plate according to an embodiment of the present application.

[0028] Figure 6 This is a schematic diagram of the exploded structure of the liquid cooling plate according to one embodiment of the present application from another perspective.

[0029] Figure 7This is a schematic diagram of the partial structure of the flow channel plate on the first side according to an embodiment of the present application.

[0030] Figure 8 This is a cross-sectional view of a portion of a liquid cooling plate according to an embodiment of the present application.

[0031] Figure 9 This is a schematic diagram of the partial structure of a liquid cooling plate according to an embodiment of the present application.

[0032] Figure 10 This is another partial structural schematic diagram of the flow channel plate on the first side according to an embodiment of the present application.

[0033] Figure 11 FIG. 1 is a schematic diagram of another partial structure of a liquid cooling plate according to an embodiment of the present application.

[0034] Figure 12 This is a schematic diagram of the partial structure of the flow channel plate on the second side surface according to an embodiment of the present application.

[0035] Figure 13 This is a cross-sectional view of a liquid cooling plate at another location according to an embodiment of the present application.

[0036] Figure 14 This is a cross-sectional view of a liquid cooling plate at another location according to an embodiment of the present application.

[0037] Figure 15 This is a cross-sectional view of a liquid cooling plate at another location according to an embodiment of the present application.

[0038] Figure 16 This is a cross-sectional view of a liquid cooling plate at another location according to an embodiment of the present application.

[0039] Figure 17 This is a cross-sectional view of a liquid cooling plate at another location according to an embodiment of the present application.

[0040] Description of main component symbols:

[0041]

[0042]

[0043] DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered therein. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be an element centered therein. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be an element centered therein. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" as used herein includes any and all combinations of one or more of the relevant listed items.

[0047] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0048] See also Figure 1 This embodiment provides a vehicle 300, including a chassis 301 and a battery pack 200. The battery pack 200 is disposed on the chassis 301. The vehicle 300 may be an electric vehicle 300 or a range-extended hybrid vehicle 300. In some embodiments, the vehicle 300 may also be an electric motorcycle or other vehicle 300 that requires charging.

[0049] See also Figure 2 , the battery pack 200 of this embodiment includes a battery module 201, a mounting beam 202 and a liquid cooling plate 100. The mounting beam 202 is used to be installed on the chassis 301 of the vehicle 300 or other types of skeleton structures. The mounting beam 202 can be constructed as a beam structure formed by staggered connection of a cross beam 2021 and a longitudinal beam 2022. The liquid cooling plate 100 is fixed to the mounting beam 202. The battery module 201 is arranged on the liquid cooling plate 100, and the liquid cooling plate 100 is used to perform heat exchange on the battery module 201 to reduce the operating temperature of the battery module 201. In some embodiments, the number of battery modules 201 is multiple, the number of liquid cooling plates 100 is multiple, and a liquid cooling plate 100 is provided for each two adjacent battery modules 201 to improve the heat dissipation efficiency of the battery module 201.

[0050] The following combination Figures 3 to 17 The liquid cooling plate 100 of this embodiment will be described.

[0051] See also Figures 3 to 6In this embodiment, the liquid cooling plate 100 includes a first plate 10, a second plate 20 and a flow channel plate 30. The first plate 10 is provided with a liquid inlet H1 and a liquid outlet H2. The liquid inlet H1 is used to introduce a cooling medium, and the liquid outlet H2 is used to discharge the cooling medium. In this embodiment, the liquid inlet H1 and the liquid outlet H2 pass through the first plate 10. In other embodiments, the surface of the first plate 10 is connected to a liquid inlet pipe and a liquid outlet pipe, the opening of the liquid inlet pipe is configured as the liquid inlet H1, and the opening of the liquid outlet pipe is configured as the liquid outlet H2. The cooling medium can be set as a coolant.

[0052] The first plate 10 is used to support the battery module 201. The flow channel plate 30 has a first side surface 311 and a second side surface 312 that are opposite to each other along the thickness direction X1. Figure 5 The first side surface 311 is provided with a first flow channel groove C1. The first side surface 311 is attached to the first plate 10. The first flow channel groove C1 and the first plate 10 form a first flow channel Q1. The first flow channel Q1 has a first starting end Q101 and a first end Q102. The liquid inlet H1 is connected to the first starting end Q101, and the first end Q102 is connected to the liquid outlet H2. The second side surface 312 is provided with a second flow channel groove C4. The second side surface 312 is attached to the second plate 20. The second flow channel groove C4 and the second plate 20 form a second flow channel Q2. The second flow channel Q2 has a second starting end Q201 and a second end Q202. The second starting end Q201 is connected to the first starting end Q101, and the second end Q202 is connected to the first end Q102.

[0053] When the liquid cooling plate 100 of this embodiment is in operation, the cooling medium is fed from the liquid inlet H1 into the first starting end Q101 of the first flow channel Q1. The cooling medium in the first starting end Q101 is divided into two branches: one branch flows into the first flow channel Q1 and flows sequentially to the first end Q102, while the other branch flows from the first starting end Q101 into the second flow channel Q2 and flows to the second end Q202. The cooling medium in the first flow channel Q1 can exchange heat with the battery module 201 through the first plate 10 or the second plate 20. The cooling medium in the second flow channel Q2 can exchange heat with the battery module 201 through the first plate 10 or the second plate 20. The cooling medium that has completed the heat exchange in the second flow channel Q2 reaches the second end Q202, merges with the cooling medium at the first end Q102, and is then discharged from the liquid outlet H2.

[0054] As a result, the liquid cooling plate 100 of this embodiment can simultaneously deliver the cooling medium into the first flow channel Q1 and the second flow channel Q2, thereby increasing the capacity of the cooling medium and further improving the heat dissipation performance of the liquid cooling plate 100, meeting the heat dissipation requirements of battery modules 201 of different powers, reducing the operating temperature of the battery module 201 and the battery pack 200, ensuring the safety performance of the battery module 201 and the battery pack 200, and further improving the energy density of the battery module 201 and the battery pack 200. At the same time, the coordination of the first plate 10, the second plate 20 and the flow channel plate 30 can further improve the strength of the liquid cooling plate 100 and improve the load-bearing capacity of the liquid cooling plate 100. In addition, the liquid inlet H1 and the liquid outlet H2 are both provided on the first plate 10, which can improve the assembly convenience of the liquid cooling plate 100 and the cooling medium circulation device (such as a pump body). Furthermore, since both the first plate 10 and the second plate 20 of the liquid cooling plate 100 have heat exchange properties, the liquid cooling plate 100 can be disposed between two adjacent layers of battery modules 201 , thereby reducing the height of the battery pack 200 and increasing the usability of the liquid cooling plate 100 .

[0055] See also Figure 7 In this embodiment, the flow channel plate 30 is provided with a first fixing hole K5 and a second fixing hole K6. The first fixing hole K5 is provided on one side of the liquid inlet H1 to accommodate the locking structure of the liquid inlet pipe, thereby securing the liquid inlet pipe to the liquid cooling plate 100. The second fixing hole K6 is provided on one side of the liquid outlet H2 to accommodate the locking structure of the liquid outlet pipe, thereby securing the liquid outlet pipe to the liquid cooling plate 100. A plurality of first fixing holes K5 may be provided, and the plurality of first fixing holes K5 may be provided around the periphery of the liquid inlet H1. A plurality of second fixing holes K6 may be provided, and the plurality of second fixing holes K6 may be provided around the periphery of the liquid outlet H2.

[0056] See also Figures 5 to 7 In this embodiment, the flow channel plate 30 includes a first plate wall 32. The first plate wall 32 is attached to the first plate 10. The first plate wall 32 is downwardly protruded along the thickness direction X1 of the flow channel plate 30 to form a plurality of protrusions 33. The plurality of protrusions 33 are spaced apart, and the space between two adjacent protrusions 33 forms a second flow channel groove C4. Figure 8 The outer protrusion 33 includes a second plate wall 331 and a side wall 332. The second plate wall 331 is attached to the second plate 20. The second plate wall 331 and the first plate wall 32 are spaced apart along the thickness direction X1 of the flow channel plate 30. The side wall 332 is connected between the second plate wall 331 and the first plate wall 32. The side wall 332 and the second plate wall 331 form a first flow channel groove C1.

[0057] In this way, the side wall 332 simultaneously constructs the first flow channel groove C1 and the second flow channel groove C4, which can increase the capacity of the first flow channel groove C1 and the second flow channel groove C4 under the premise that the width and length dimensions of the flow channel plate 30 are constant, thereby increasing the flow rate of the cooling medium and improving the cooling efficiency of the liquid cooling plate 100.

[0058] In this embodiment, the flow channel plate 30 can be formed from a single sheet of material by stamping. Specifically, a designated area of ​​the sheet is stamped once or multiple times, so that the portion of the sheet in the designated area is formed into a plurality of protrusions 33, while the portion of the sheet in other areas is formed into the first plate wall 32.

[0059] In this embodiment, the first plate wall 32 is connected to the first plate 10 by brazing. The second plate wall 331 is connected to the second plate 20 by brazing. In this way, the first plate 10, the second plate 20 and the flow channel plate 30 are welded into an integrated structure to ensure the sealing performance of the first flow channel Q1 and the second flow channel Q2. At the same time, the first plate 10 and the second plate 20 are roughly formed into a flat plate shape to facilitate the reliability of the brazing connection of the first plate 10, the flow channel plate 30 and the second plate 20. In addition, the flat first plate 10 and the second plate 20 can also directly contact the battery module 201 surface and realize heat exchange, so there is no need to set a heat-conducting structure between the liquid cooling plate 100 and the battery module 201, simplifying the structure of the battery pack 200 and reducing assembly costs and consumables costs.

[0060] In some embodiments, the edge of the first plate wall 32 of the flow channel plate 30 is brazed to the edge of the first plate 10. The second plate wall 331 of the outer protrusion 33 at the edge of the flow channel plate 30 is brazed to the edge of the second plate 20. This improves the processing convenience of the liquid cooling plate 100.

[0061] In this embodiment, see Figure 5 and Figure 6 A first connection hole K1 is defined in a portion of the first plate 10, and a connection recess 21 is defined in the second plate 20. The connection recess 21 is recessed toward the liquid cooling plate 100 along the thickness direction X1 of the liquid cooling plate 100 and abuts against the first plate wall 32 of the flow channel plate 30. A second connection hole K2 is defined in the connection recess 21, and a third connection hole K3 is defined in the first plate wall 32. The first connection hole K1, the second connection hole K2, and the third connection hole K3 correspond to each other along the thickness direction X1 of the liquid cooling plate 100. The first connection hole K1, the second connection hole K2, and the third connection hole K3 are respectively used to secure the liquid cooling plate 100 to the mounting beam 202 via a fastening structure. The fastening structure can be a flow drill screw or a conventional bolt structure.

[0062] In some embodiments, multiple first connection holes K1, second connection holes K2, and third connection holes K3 are provided. Multiple first connection holes K1 are distributed in a cross pattern on the first plate 10. Multiple second connection holes K2 are distributed in a cross pattern on the second plate 20. The connection recess 21 extends along the longitudinal direction X2 of the liquid cooling plate 100, and some of the second connection holes K2 are spaced apart along the longitudinal direction X2 of the connection recess 21. Multiple third connection holes K3 are distributed in a cross pattern on the first plate wall 32.

[0063] Specifically, a cross-shaped row of first connection holes K1 includes a plurality of first connection holes K1a, a row of first connection holes K1 includes another plurality of first connection holes K1a, a cross-shaped row of second connection holes K2 includes a plurality of second connection holes K2a, a row of second connection holes K2 includes another plurality of second connection holes K2a, a cross-shaped row of third connection holes K3 includes a plurality of third connection holes K3a, and a row of third connection holes K3 includes another plurality of third connection holes K3a. In other embodiments, the distribution shape of the plurality of first connection holes K1, the plurality of second connection holes K2, and the plurality of third connection holes K3 may also be rectangular, in a "T-shaped" pattern, or other shapes.

[0064] In some embodiments, see Figure 6 The plurality of first connection holes K1 include a first connection hole K1a and a first connection hole K1b. The first connection hole K1a is used to receive a conventional bolt structure, while the remaining first connection holes K1b are used to receive flow drill screws. The plurality of second connection holes K2 include a second connection hole K2a and a second connection hole K2b. The second connection hole K2a is used to receive a conventional bolt structure, while the remaining second connection holes K2b are used to receive flow drill screws. The plurality of third connection holes K3 include a third connection hole K3a and a third connection hole K3b. The third connection hole K3a is used to receive a conventional bolt structure, while the remaining third connection holes K3b are used to receive flow drill screws.

[0065] In this embodiment, see Figure 3 、 Figure 4 and Figure 6 The liquid cooling plate 100 has a first end D1 and a second end D2, which are respectively located at two ends of the length direction X2 of the liquid cooling plate 100. The liquid inlet H1 and the liquid outlet H2 are both located at the first end D1.

[0066] In this embodiment, see Figure 7The flow channel plate 30 is provided with a first connecting hole K7 and a second connecting hole K8. The first connecting hole K7 and the second connecting hole K8 are both located at the first end D1. The first connecting hole K7 connects the first starting end Q101 of the first flow channel Q1 and the second starting end Q201 of the second flow channel Q2. The first connecting hole K7 is located between the liquid inlet H1 and the liquid outlet H2. The second connecting hole K8 connects the first end Q102 of the first flow channel Q1 and the second end Q202 of the second flow channel Q2. The second connecting hole K8 is located on the side of the first connecting hole K7 closer to the second end D2 along the longitudinal direction X2 of the liquid cooling plate 100. In this way, the first flow channel Q1 and the second flow channel Q2 are connected, and the cooling medium that has completed heat exchange in the first flow channel Q1 and the cooling medium that has completed heat exchange in the second flow channel Q2 are merged and then discharged from the liquid outlet H2. In this embodiment, the first connecting hole K7 and the second connecting hole K8 are both provided on the side wall 332 of the outer protrusion 33.

[0067] In this embodiment, the first communication hole K7 and the second communication hole K8 can be formed in the following manner. Before the flow channel plate 30 is stamped, the flow channel plate 30 is provided with a pre-stamping area for stamping and forming the outer protrusion 33. An incision is made at any edge position of the pre-stamping area. In this way, after the pre-stamping area is stamped, the incision can be formed into the first communication hole K7 and / or the second communication hole K8.

[0068] Specifically, a cutout can be provided on the side of the pre-stamping area to form a first connecting hole K7 on the side of the outer protrusion 33. A cutout can be provided at the end of the pre-stamping area to form a second connecting hole K8 on the end face of the outer protrusion 33. Two cutouts spaced apart along the length direction X2 of the pre-stamping area are provided, and two second connecting holes K8 are formed between the two cutouts. The method of stamping after the cutouts are provided can help improve the processing convenience and efficiency of the flow channel plate 30. In other embodiments, after the flow channel plate 30 is stamped, the first connecting hole K7 and / or the second connecting hole K8 can be opened in designated areas of the sidewall 332 of different outer protrusions 33.

[0069] In this embodiment, see Figure 5 and Figure 6, there are two first flow channel grooves C1, and the two first flow channel grooves C1 are symmetrical about the symmetry plane, and the symmetry plane is a plane perpendicular to the width direction X3 of the liquid cooling plate 100 and parallel to the thickness direction X1 of the liquid cooling plate 100. The two first flow channel grooves C1 are connected in parallel to the liquid inlet H1. Correspondingly, there are two second flow channel grooves C4, and the two second flow channel grooves C4 are symmetrical about the symmetry plane. The two second flow channel grooves C4 are connected in parallel to the first connecting hole K7. In other embodiments, the number of first flow channel grooves C1 and the number of second flow channel grooves C4 can also be adjusted according to actual needs. For example, the number of first flow channel grooves C1 can be set to three, four or more. The number of second flow channel grooves C4 can be set to three, four or more.

[0070] In this embodiment, see Figure 7 The first communication hole K7 is located between the liquid inlet H1 and the liquid outlet H2 along the width direction X3 of the liquid cooling plate 100. In this way, the three flow modes of cooling medium input, diversion, and discharge can be guaranteed to not interfere with each other.

[0071] The structure and shape of a single first flow channel groove C1 and a single second flow channel groove C4 are described below. The structure and shape of another first flow channel groove C1 and another second flow channel groove C4 can be understood by reference and will not be described in detail. Figure 9 and Figure 10 The second plate 20 is indicated by dotted lines to facilitate expression of the matching relationship between the second plate 20 and the flow channel plate 30 .

[0072] In this embodiment, see Figure 9 and Figure 10 , the first flow channel groove C1 includes a first liquid inlet groove C2 and a plurality of front cooling grooves C3. The first liquid inlet groove C2 is located at the first starting end Q101 of the first flow channel groove C1. The outer protrusion 33 includes a liquid inlet outer protrusion 33a, and the liquid inlet outer protrusion 33a includes a liquid inlet side wall 332a. The liquid inlet side wall 332a and the first plate 10 are configured to form the first liquid inlet groove C2, and the liquid inlet side wall 332a and the second plate 20 are configured to form the second starting end Q201 of the second flow channel Q2. The liquid inlet side wall 332a is provided with a first connecting hole K7, and the first connecting hole K7 connects the first liquid inlet groove C2 and the second starting end Q201. The plurality of front cooling grooves C3 respectively include a first input end C301, and the plurality of first input ends C301 are respectively connected to the first liquid inlet groove C2 at intervals.

[0073] The first liquid inlet groove C2 can divide the cooling medium input from the liquid inlet H1 into two branches, one of which enters the multiple front cooling grooves C3 and the other enters the second starting end Q201 of the second flow channel groove C4. By providing the first connecting hole K7 on the liquid inlet side wall 332a of the liquid inlet outer protrusion 33a, the cooling medium input from the liquid inlet H1 can quickly enter the first starting end Q101 and the second starting end Q201, thereby ensuring that the temperatures of the cooling medium entering the first flow channel Q1 and the cooling medium entering the second flow channel Q2 are relatively close, ensuring that the heat dissipation performance on both sides of the thickness direction X1 of the liquid cooling plate 100 is roughly the same. Multiple first input ends C301 are connected to the first liquid inlet groove C2 at intervals, enabling the multiple front cooling grooves C3 to be connected in parallel, ensuring that the cooling performance of the cooling medium in each front cooling groove C3 is roughly the same, thereby improving the heat dissipation uniformity of the liquid cooling plate 100 and the temperature uniformity of the battery module 201.

[0074] Among them, see Figure 10 The first liquid inlet groove C2 is located at the first end D1 and extends along the width direction X3 of the liquid cooling plate 100. Multiple front cooling grooves C3 are spaced apart along the width direction X3 of the liquid cooling plate 100. The front cooling grooves C3 extend along the length direction X2 of the liquid cooling plate 100 and each include a first input end C301 and a first output end C302. The front cooling grooves C3 are generally inverted U-shaped, with both the first input end C301 and the first output end C302 located at the first end D1.

[0075] In some embodiments, see Figure 9 and Figure 10 The flow channel plate 30 is further provided with a liquid inlet groove C13 on the first side surface 311. The liquid inlet groove C13 is connected to the first liquid inlet groove C2 of a first flow channel groove C1. In the thickness direction X1 of the flow channel plate 30, the liquid inlet groove C13 corresponds to the liquid inlet H1, so that the cooling medium enters the first liquid inlet groove C2 through the liquid inlet groove C13 and flows from the first liquid inlet groove C2 into another first liquid inlet groove C2.

[0076] In this embodiment, see Figures 11 to 14 The second flow channel groove C4 includes a second liquid inlet groove C5, a first parallel groove C10 and a plurality of reverse cooling grooves C6. The second liquid inlet groove C5 is adjacent to the first parallel groove C10 along the thickness direction X1 of the flow channel plate 30. The second liquid inlet groove C5 is located at the second starting end Q201 of the second flow channel groove C4. One end of the second liquid inlet groove C5 is connected to the first starting end Q101 through the second connecting hole K8, and the other end of the second liquid inlet groove C5 is connected to the first parallel groove C10. The side wall 332 is provided with a second connecting hole K8, and the second connecting hole K8 is connected between the first end Q102 and the second end Q202. Figure 12, multiple reverse cooling grooves C6 respectively have a second input end C601 and a second output end C602, multiple second input ends C601 are connected to the first parallel groove C10, multiple second input ends C601 are spaced apart along the length direction X2 of the first parallel groove C10, and multiple second output ends C602 are all connected to the second end Q202.

[0077] A stream of cooling medium can enter the second liquid inlet groove C5 through the first connecting hole K7 and flow into the first parallel groove C10. The cooling medium in the first parallel groove C10 sequentially flows into the multiple second input ports C601 and flows through the multiple reverse cooling grooves C6 to the multiple second output ports C602. Furthermore, the first parallel groove C10 and the multiple reverse cooling grooves C6 are connected in parallel, allowing the cooling medium to flow evenly into each reverse cooling groove C6, improving the flow uniformity of the cooling medium and ensuring similar cooling temperatures within each reverse cooling groove C6, thereby improving the temperature uniformity of the battery module 201.

[0078] The cooling medium can exchange heat with the battery module 201 in the multiple reverse cooling grooves C6. After the heat exchange is completed, the cooling medium flows from the multiple second output ends C602 to the second end Q202. The cooling medium at the second end Q202 reaches the first end Q102 through the second connecting hole K8 and merges with the cooling medium that has completed the heat exchange in the first end Q102. The merged cooling medium is discharged through the liquid outlet H2.

[0079] Because the first parallel groove C10 and the second liquid inlet groove C5 are adjacent to each other along the thickness direction X1 of the flow channel plate 30, it is unnecessary to open a connecting hole in the flow channel plate 30 to prevent the cooling medium from flowing into the second flow channel groove C4 when flowing to the middle part in the first flow channel groove C1, thereby achieving isolation of the middle part of the first flow channel groove C1 and the middle part of the second flow channel groove C4.

[0080] In one implementation of this embodiment, the second liquid inlet groove C5 extends along the length direction X2 of the liquid cooling plate 100, the first parallel groove C10 extends along the width direction X3 of the liquid cooling plate 100, and the multiple reverse cooling grooves C6 are spaced apart along the width direction X3 of the liquid cooling plate 100.

[0081] In this embodiment, see Figure 8 and Figure 9 as well as Figure 13The liquid inlet sidewall 332a of the liquid inlet protrusion 33a, which has a first connecting hole K7, defines an auxiliary groove C8 on the second side surface 312 of the flow channel plate 30. The second plate 20 is provided with a liquid inlet protrusion 22 and two third blocking portions 233. The liquid inlet protrusion 22 is formed by another portion of the second plate 20 protruding away from the first plate 10 along the thickness direction X1 of the liquid cooling plate 100. A second liquid inlet groove C5 is formed between the liquid inlet protrusion 22 and the second side surface 312 of the flow channel plate 30. The second liquid inlet groove C5 is connected to the auxiliary groove C8. The two third blocking portions 233 are formed by a portion of the second plate 20 protruding toward the first plate 10 along the thickness direction X1 of the liquid cooling plate 100 and abutting the first plate wall 32. Along the width direction X3 of the liquid cooling plate 100, the two third blocking portions 233 are respectively provided on either side of the liquid inlet protrusion 22. The third blocking portion 233 is used to block the auxiliary groove C8, so that the cooling medium flowing out of the first connecting hole K7 can only flow into the second liquid inlet groove C5, and then flow into the first parallel groove C10.

[0082] In this embodiment, see Figure 9 and Figure 11 On the second side surface 312 of the flow channel plate 30, an intermediate groove C9 is provided between two adjacent second flow channel grooves C4. The intermediate groove C9 extends along the longitudinal direction X2 of the liquid cooling plate 100. Other third connection holes K3 are spaced apart in the intermediate groove C9. The intermediate groove C9 is formed between the two cooling protrusions 33c. Furthermore, on the inner side of the intermediate groove C9, the connecting recess 21 abuts the first plate wall 32. The longitudinal ends of the intermediate groove C9 are connected to the first parallel groove C10 and the second liquid inlet groove C5, respectively.

[0083] In some embodiments, the second plate 20 defines a plurality of through-holes K4 that penetrate the second plate 20 along the thickness direction X1 of the flow channel plate 30. The through-holes K4 correspond to the second input ends C601 of the plurality of reverse cooling grooves C6. The liquid cooling plate 100 further includes a third plate 40 disposed on a side of the second plate 20 facing away from the first plate 10. The third plate 40 is formed with first parallel grooves C10 projecting outwardly away from the first plate 10. The third plate 40 corresponds to the plurality of through-holes K4 along the thickness direction X1 of the liquid cooling plate 100, such that the first parallel grooves C10 are connected to the plurality of second input ends C601 via the plurality of through-holes K4.

[0084] The cooling medium flowing from the second liquid inlet groove C5 into the first parallel groove C10 passes through multiple through holes K4 in sequence and reaches each second input end C601 during the flow process, thereby achieving the function of transporting the cooling medium to multiple parallel second cooling grooves through the second liquid inlet groove C5.

[0085] In another embodiment of this embodiment, the second plate 20 is provided with a protrusion (not shown) extending outwardly from the first plate 10 along the thickness direction X1 of the liquid cooling plate 100. The protrusion defines a first parallel groove C10. The protrusion extends along the width direction X3 of the liquid cooling plate 100. Therefore, in this embodiment, there are various ways to form the first parallel groove C10, which are not specifically limited in this embodiment.

[0086] In some embodiments, see Figure 11 The second flow channel groove C4 further includes a second parallel groove C11, which is adjacent to the plurality of reverse cooling grooves C6 along the thickness direction X1 of the flow channel plate 30, and the plurality of second output ends C602 are connected to the second parallel groove C11 at intervals along the length direction X2 of the second parallel groove C11. Figure 12 The protrusion 33 includes a discharge protrusion 33b, which defines a discharge groove C7. One end of the discharge groove C7 communicates with the first end Q102 of the first flow channel C1, and the other end of the discharge groove C7 corresponds to the liquid outlet H2 along the thickness direction X1 of the liquid cooling plate 100. In some embodiments, the second plate 20 is provided with a parallel protrusion 24 that protrudes outward from the first plate 10 along the thickness direction X1 of the liquid cooling plate 100. The parallel protrusion 24 defines a second parallel groove C11. The parallel protrusion 24 extends along the width direction X3 of the liquid cooling plate 100.

[0087] In this way, the second parallel groove C11 can collect the cooling medium discharged from the multiple reverse cooling grooves C6 and further flow this collected cooling medium into the discharge groove C7. Simultaneously, the cooling medium discharged from the first terminal Q102 can also be directly fed into the discharge groove C7. The discharge groove C7 collects the cooling medium from the first flow channel Q1 and the cooling medium from the second flow channel Q2, and then discharges it through the liquid outlet H2. This structural design enables the parallel connection of the first flow channel Q1 and the second flow channel Q2, reducing the mutual influence of the cooling medium, while providing a certain flow path for the cooling medium to be transported, ensuring the cooling efficiency and flow reliability of the cooling medium.

[0088] Optionally, the second parallel grooves C11 are formed by the second plate 20 protruding away from the first plate 10 along the thickness direction X1 of the liquid cooling plate 100 .

[0089] In this embodiment, one end of the discharge groove C7 is connected to a second flow channel groove C4, and the other end of the discharge groove C7 is connected to another second flow channel groove C4. The middle of the discharge groove C7 corresponds to the liquid outlet H2 along the thickness direction X1 of the liquid cooling plate 100.

[0090] In this embodiment, to facilitate the processing of the flow channel plate 30, second communication holes K8 are provided on each of the two sidewalls 332 forming the liquid inlet protrusion 22 along the width direction X3 of the liquid cooling plate 100. These second communication holes K8 correspond to the second parallel grooves C11. The second plate 20 also includes two fourth blocking portions 234. These fourth blocking portions 234 are formed by a portion of the second plate 20 protruding from the first plate 10 along the thickness direction X1 of the liquid cooling plate 100 and abutting the first plate wall 32. The two fourth blocking portions 234 are respectively used to block the two second communication holes K8, thereby preventing the cooling medium from flowing directly from the second communication holes K8 into the second parallel grooves C11.

[0091] In some embodiments, the second parallel grooves C11 are spaced apart from the first parallel grooves C10 along the length direction X2 of the liquid cooling plate 100. Along the length direction X2 of the liquid cooling plate 100, the second parallel grooves C11 are located between the first parallel grooves C10 and the liquid outlet H2. This ensures sufficient cooling medium flow area and improves cooling medium utilization.

[0092] In this embodiment, see Figures 9 to 12 The front cooling grooves C3 correspond to the back cooling grooves C6. The front cooling grooves C3 and back cooling grooves C6 correspond to each other, meaning that one front cooling groove C3 and one back cooling groove C6 are formed on each side of the sidewall 332 of the outer protrusion 33. Each of the front cooling grooves C3 has a first output end C302. One of the front cooling grooves C3 is a converging cooling groove C303, and the discharge groove C7 is connected to the first output end C302 of the converging cooling groove C303. The outer protrusion 33 includes a plurality of cooling outer protrusions 33c, and the plurality of cooling outer protrusions 33c are spaced apart from each other. Each cooling outer protrusion 33c includes a cooling outer wall 332c. One side of the cooling outer wall 332c forms a side of a front cooling groove C3, and the other side of the cooling outer wall 332c forms a side of a reverse cooling groove C6. The cooling outer wall 332c has a second connecting hole K8, and the second connecting hole K8 is located at the first output end C302. The second connecting hole K8 connects the front cooling groove C3 and the reverse cooling groove C6. The second connecting hole K8 is also connected to the second parallel groove C11.

[0093] Because the drain groove C7 is only provided on the first side surface 311 of the flow channel plate 30, the cooling medium in the multiple front cooling grooves C3 flows directly into the second parallel grooves C11 under fluid pressure, without passing through the second connecting hole K8 to enter the reverse cooling grooves C6. The reverse cooling grooves C6, under fluid pressure, pass through the second connecting hole K8 and then merge into the second parallel grooves C11. The cooling medium collected in the second parallel grooves C11, under fluid pressure, passes through the second connecting hole K8 and reaches the converging cooling grooves C303. The cooling medium entering the converging cooling grooves C303 no longer flows through the second connecting hole K8, but flows directly into the drain grooves C7 and is then discharged from the liquid outlet H2.

[0094] In some embodiments, see Figure 11 and Figure 12 A reverse clearance groove C12 is formed between two adjacent cooling protrusions 33c. Reverse clearance groove C12 is connected to second parallel groove C11 via second connecting hole K8. Cooling medium within second parallel groove C11 can flow through second connecting hole K8 into reverse clearance groove C12, improving cooling medium utilization. In other embodiments, reverse clearance groove C12 can also be connected between first parallel groove C10 and second parallel groove C11, thereby facilitating reverse clearance groove C12 to transport cooling medium to second parallel groove C11, thereby increasing the cooling area of ​​second side surface 312.

[0095] In some embodiments, a third connection hole K3a is defined in the portion of the first plate wall 32 corresponding to the reverse clearance groove C12. The second plate 20 is provided with a first blocking portion 231, which protrudes toward the first plate 10 along the thickness direction X1 of the liquid cooling plate 100. The first blocking portion 231 is located within the reverse clearance groove C12 and abuts against the first plate wall 32. The first blocking portion 231 is used to block the reverse clearance groove C12 to prevent the cooling medium from flowing out of the reverse clearance groove C12 or otherwise interfering with the installation of the fastening structure within the third connection hole K3a. Optionally, along the length direction X2 of the liquid cooling plate 100, the first blocking portion 231 is located between the first parallel groove C10 and the third connection hole K3a.

[0096] The following describes the structure and shape of the multiple front cooling grooves C3 and the multiple rear cooling grooves C6 in this embodiment. In this embodiment, each first flow channel C1 includes four front cooling grooves C3 and four rear cooling grooves C6. In other embodiments, the number of front cooling grooves C3 and rear cooling grooves C6 can be adjusted based on actual needs.

[0097] In this embodiment, see Figure 10The front cooling groove C3 includes a front liquid inlet groove C304, a front liquid outlet groove C305 and a front reflux groove C306. The front liquid inlet groove C304 is constructed as a first input end C301 and is connected to the first liquid inlet groove C2. The front liquid outlet groove C305 is constructed as a first output end C302 and is connected to the liquid outlet H2. The front liquid outlet groove C305 is connected to the second connecting hole K8, and is connected to the second output end C602 of the reverse cooling groove C6 through the second connecting hole K8, and then connected to the reverse cooling groove C6 through the second parallel groove C11, and is connected to the discharge groove C7 on the first side 311 of the flow channel plate 30 through a second connecting hole K8 at the converging cooling groove C303, and then discharged through the liquid outlet H2.

[0098] The front reflux groove C306 is roughly in an inverted U shape, with one side of the longitudinal direction X2 of the front reflux groove C306 closed, and the two ends of the other side of the longitudinal direction X2 of the front reflux groove C306 are respectively connected to the front liquid inlet groove C304 and the front liquid outlet groove C305.

[0099] See also Figure 10 The shape of the front liquid inlet groove C304 can be configured into a variety of different shapes such as a meandering S-shape or an inverted S-shape, an L-shape or an inverted L-shape, a straight line, etc. The shape of the front liquid inlet groove C304 can be adjusted according to different flow channel designs, and this embodiment does not specifically limit it.

[0100] In some embodiments, see Figure 10 A spoiler R is also provided on the first side surface 311 of the flow channel plate 30. The spoiler R is located in the front liquid inlet groove C304. The spoiler R can play a spoiler role, destroy the flow boundary of the cooling medium, enable the fluid to be fully mixed, and increase the heat exchange capacity.

[0101] In this embodiment, the second input end C601 of the reverse cooling groove C6 is connected to the first parallel groove C10. The second input end C601 of the reverse cooling groove C6 is connected to the first parallel groove C10, and the second output end C602 of each reverse cooling groove C6 is connected in parallel to the second parallel groove C11. The shape of the reverse cooling groove C6 matches that of the front cooling groove C3. For example, if the front cooling groove C3 is an inverted U-shape, the shape of the reverse cooling groove C6 is configured as a line, which can be a straight line, a broken line, or a curved line.

[0102] In this embodiment, two front reflow grooves C306 are provided, one of which is located outside the other front reflow groove C306. The two front openings are connected in parallel to the front liquid inlet groove C304, and the two front outlets are connected in parallel to the front liquid outlet groove C305. The two front reflow grooves C306 are both in an inverted U shape. The two front reflow grooves C306 form a first reverse cooling groove C603 and a second reverse cooling groove C604. The first reverse cooling groove C603 is located between the two front reflow grooves C306 and is in an inverted U shape. The second reverse cooling groove C604 is located within the inner front reflow groove C306 and is linear.

[0103] In some embodiments, a third connection hole K3b is formed in the portion of the first plate wall 32 corresponding to the second reverse cooling groove C604. The third connection hole K3b is used to install a fastening structure, which can be a flow drill screw. The second plate 20 also has a second blocking portion 232, which protrudes toward the first plate 10 along the thickness direction X1 of the liquid cooling plate 100. The second blocking portion 232 is located within the second reverse cooling groove C604 and abuts against the first plate wall 32. The second blocking portion 232 is used to block the second reverse cooling groove C604 to prevent the cooling medium from interfering with the installation of the fastening structure within the third connection hole K3b. Optionally, along the length direction X2 of the liquid cooling plate 100, the second blocking portion 232 is located between the first parallel groove C10 and the third connection hole K3b.

[0104] In some embodiments, see Figure 11 、 Figures 15 to 17 The second plate 20 also has a series protrusion 23. Along the thickness direction X1 of the liquid cooling plate 100, the series protrusion 23 projects outward in a direction away from the first plate 10. The series protrusion 23 defines a series connecting groove C15, which is adjacent to the reverse cooling groove C6 along the thickness direction X1 of the liquid cooling plate 100. One end of the first reverse cooling groove C603 connects to the first parallel groove C10, and the other end of the first reverse cooling groove C603 connects to the second reverse cooling groove C604 through the series connecting groove C15. The second reverse cooling groove C604 connects to the reverse cooling groove C6. The series connecting grooves C15 of some series protrusions 23 are also directly connected to the second parallel groove C11.

[0105] In other embodiments, when a plurality of front-side reflow grooves C306 are provided to form a plurality of reverse-side cooling grooves C6, the plurality of reverse-side cooling grooves C6 may be sequentially connected in parallel with the first parallel groove C10.

[0106] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application should not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. A liquid cooling plate, characterized in that: include: a first plate and a second plate, wherein the first plate is provided with a liquid inlet and a liquid outlet, the liquid inlet is used for introducing a cooling medium, and the liquid outlet is used for discharging the cooling medium; a flow channel plate, the flow channel plate having a first side surface and a second side surface opposite to each other in a thickness direction; The first side surface is provided with a first flow channel groove, the first side surface is attached to the first plate, the first flow channel groove and the first plate form a first flow channel, the first flow channel has a first starting end and a first end, the liquid inlet is connected to the first starting end, and the first end is connected to the liquid outlet; The second side surface is provided with a second flow channel groove, the second side surface is attached to the second plate, the second flow channel groove and the second plate form a second flow channel, the second flow channel has a second starting end and a second end, the second starting end is connected to the first starting end, and the second end is connected to the first end.

2. The liquid cooling plate according to claim 1, wherein: The flow channel plate includes a first plate wall, the first plate wall is attached to the first plate member, the first plate wall is downwardly protruded along the thickness direction of the flow channel plate to form a plurality of protrusions, the plurality of protrusions are spaced apart, and the second flow channel groove is configured between two adjacent protrusions; The outer protrusion includes a second plate wall and a side wall, the second plate wall is attached to the second plate member; the second plate wall and the first plate wall are spaced apart along the thickness direction of the flow channel plate, the side wall is connected between the second plate wall and the first plate wall, and the first flow channel groove is formed between the side wall and the second plate wall.

3. The liquid cooling plate according to claim 2, wherein: The first flow channel includes a first liquid inlet groove and a plurality of front cooling grooves, the first liquid inlet groove is located at the first starting end of the first flow channel, the outer protrusion includes a liquid inlet outer protrusion, the liquid inlet outer protrusion includes a liquid inlet side wall, the liquid inlet side wall and the first plate constitute the first liquid inlet groove, and the liquid inlet side wall and the second plate constitute the second starting end of the second flow channel; A first communicating hole is formed on the liquid inlet side wall, and the first communicating hole communicates with the first liquid inlet groove and the second starting end; The plurality of front cooling grooves each include a first input end and a first output end. The plurality of first input ends are connected to the first liquid inlet groove at intervals, and the plurality of first output ends are connected to the liquid outlet.

4. The liquid cooling plate according to claim 3, wherein: There are two first flow channel grooves, the two first flow channel grooves are symmetrical about a symmetry plane, the symmetry plane is a plane perpendicular to the width direction of the liquid cooling plate and parallel to the thickness direction of the liquid cooling plate, and the first liquid inlet grooves of the two first flow channel grooves are connected; The flow channel plate is further provided with a liquid inlet groove on the first side surface, the liquid inlet groove is connected to the first liquid inlet groove of one of the first flow channel grooves, and in the thickness direction of the flow channel plate, the liquid inlet groove corresponds to the liquid inlet.

5. The liquid cooling plate according to claim 2, wherein: The second flow channel groove includes a second liquid inlet groove, a first parallel groove and a plurality of reverse cooling grooves, the second liquid inlet groove and the first parallel groove are adjacent to each other along the thickness direction of the flow channel plate, the second liquid inlet groove is located at the second starting end of the second flow channel groove, one end of the second liquid inlet groove is connected to the first starting end, and the other end of the second liquid inlet groove is connected to the first parallel groove; The side wall is provided with a second communicating hole, the second communicating hole being connected between the first end and the second end; The plurality of reverse cooling grooves respectively have a second input end and a second output end, the plurality of the second input ends are connected to the first parallel groove, the plurality of the second input ends are spaced apart along the length direction of the first parallel groove, and the plurality of the second output ends are all connected to the second end.

6. The liquid cooling plate according to claim 5, characterized in that: The second plate is provided with a plurality of through holes, the plurality of through holes passing through the second plate along the thickness direction of the flow channel plate, and the plurality of through holes respectively correspond to the second input ends of the plurality of reverse cooling grooves; The liquid cooling plate also includes a third plate, which is arranged on a side of the second plate away from the first plate, and the first parallel grooves are formed on the third plate in a direction away from the first plate. The third plate corresponds to the multiple through holes along the thickness direction of the liquid cooling plate, so that the first parallel grooves are connected to the multiple second input ends through the multiple through holes.

7. The liquid cooling plate according to claim 5, characterized in that: The second flow channel groove further includes a second parallel groove, the second parallel groove is adjacent to the plurality of the reverse cooling grooves along the thickness direction of the flow channel plate, and the plurality of second output ends are connected to the second parallel groove at intervals along the length direction of the second parallel groove; The outer protrusion includes a discharge outer protrusion, which defines a discharge groove. One end of the discharge groove is connected to the first end of the first flow channel groove, and the other end of the discharge groove corresponds to the liquid outlet along the thickness direction of the liquid cooling plate.

8. The liquid cooling plate according to claim 7, wherein: The first flow channel includes a plurality of front cooling grooves, each of the front cooling grooves corresponds to one of the reverse cooling grooves, and the plurality of front cooling grooves each have a first output end, wherein one of the front cooling grooves is a converging cooling groove, and the discharge groove is connected to the first output end of the converging cooling groove; The outer protrusion includes a plurality of cooling outer protrusions, and the plurality of cooling outer protrusions are spaced apart from each other. Each of the cooling outer protrusions includes a cooling outer wall, one side of the cooling outer wall forms a side surface of the front cooling groove, and the other side of the cooling outer wall forms a side surface of the reverse cooling groove. The cooling outer wall is provided with the second connecting hole, and the second connecting hole is located at the first output end. The second connecting hole connects the front cooling groove and the reverse cooling groove, and the second connecting hole is also connected to the second parallel groove.

9. A battery pack, characterized in that: include: Battery modules; The liquid cooling plate according to any one of claims 1 to 8, wherein the liquid cooling plate is in heat exchange with the battery module.

10. A vehicle, characterized in that: Comprising the liquid cooling plate according to any one of claims 1 to 8, and / or the battery pack according to claim 9.

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