Liquid cooling plate and battery pack

Abstract

The present application discloses a liquid cooling plate and a battery pack. The liquid cooling plate comprises: a body portion provided with a heat exchange cavity and a first opening in communication with each other, the first opening being formed on a side portion of the heat exchange cavity; a first blocking portion provided at the first opening to block the first opening; a liquid inlet structure provided on the first blocking portion, the liquid inlet structure being in communication with the heat exchange cavity; and a liquid outlet structure provided on the first blocking portion, the liquid outlet structure being in communication with the heat exchange cavity, and the liquid outlet structure and the liquid inlet structure being located on the same side where the first opening is located.

Description

Liquid cooling plate and battery pack

[0001] The present application claims priority to the Chinese patent application No. 2024218995865 filed on August 6, 2024 with the China Patent Office, the whole content of the above application being incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery pack, in particular to a liquid cooling plate and a battery pack. BACKGROUND

[0003] In the integration process of the battery pack, the liquid cooling plate plays a crucial role in heat dissipation. The liquid cooling plate usually includes a body part, a liquid inlet nozzle and a liquid outlet nozzle. TECHNICAL PROBLEM

[0004] In the related art, after the liquid inlet nozzle and the liquid outlet nozzle are assembled to the body part, stress concentration problems may occur at the connection positions of the body part and the liquid inlet nozzle and the body part and the liquid outlet nozzle, and the assembly process is relatively complex. TECHNICAL SOLUTION

[0005] In a first aspect, the present application provides a liquid cooling plate, which includes: a body part having a heat exchange cavity and an opening structure in communication with each other, the opening structure being arranged at a side of the heat exchange cavity; a blocking part, at least part of the blocking part being located in the opening structure to block and support the opening structure; a liquid inlet structure arranged on the blocking part, the liquid inlet structure being in communication with the heat exchange cavity; and a liquid outlet structure arranged on the blocking part, the liquid outlet structure being in communication with the heat exchange cavity.

[0006] In a second aspect, the present application provides a battery pack, which includes: a battery module, the battery module being provided with at least two groups; the liquid cooling plate described above, the liquid cooling plate being arranged in stack with the battery module; wherein the liquid cooling plate includes a middle liquid cooling plate and an end liquid cooling plate, one middle liquid cooling plate being arranged between two adjacent groups of battery modules; and the end liquid cooling plate being arranged at a side of the battery module at the end away from the middle liquid cooling plate. ADVANTAGEOUS EFFECTS

[0007] The present application provides the following advantageous effects: the liquid inlet structure and the liquid outlet structure are integrated on the blocking part respectively, then the blocking part is installed at the opening structure to block the opening structure, so that the liquid inlet structure and the liquid outlet structure are in communication with the heat exchange cavity respectively. In this way, two through holes respectively matched with the liquid inlet structure and the liquid outlet structure are not arranged on the body part, so that the possibility of stress concentration of the body part is reduced; and the blocking part integrated with the liquid inlet structure and the liquid outlet structure is installed at the opening structure, so that the assembly process is relatively simple. In addition, at least part of the blocking part is located in the opening structure, so that the possibility of deformation of the opening structure is reduced, and the structural stability of the liquid cooling plate is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0008] Fig. 1 shows a structural schematic diagram of one kind of liquid cooling plate provided by the embodiment of the present application;

[0009] Fig. 2 shows a partial structural schematic diagram at A in Fig. 1;

[0010] Fig. 3 shows a structural schematic diagram of water inlet structure and water outlet structure integrated into the first plugging part provided by the embodiment of the present application;

[0011] Fig. 4 shows a partial structural sectional view of the liquid cooling plate shown in Fig. 1;

[0012] Fig. 5 shows a side view of the body part of the liquid cooling plate shown in Fig. 1;

[0013] Fig. 6 shows a structural schematic diagram of another kind of liquid cooling plate provided by the embodiment of the present application;

[0014] Fig. 7 shows a first perspective structural schematic diagram of a battery pack provided by the embodiment of the present application;

[0015] Fig. 8 shows a partial structural schematic diagram at B in Fig. 7;

[0016] Fig. 9 shows a second perspective structural schematic diagram of the battery pack provided by the embodiment of the present application;

[0017] Fig. 10 shows a first perspective structural schematic diagram of a module fixing part provided by the embodiment of the present application;

[0018] Fig. 11 shows a second perspective structural schematic diagram of the module fixing part provided by the embodiment of the present application.

[0019] In the drawings:

[0020] 10, body part;

[0021] 101, heat exchange cavity; 1011, communication passage; 1012, liquid inlet passage; 1013, liquid outlet passage;

[0022] 1014, first converging passage; 1015, second converging passage; 1016, third converging passage; 1017, fourth converging passage;

[0023] 102, first opening; 103, accommodation groove; 104, second opening;

[0024] 11, first plate body; 12, second plate body;

[0025] 20, first plugging part;

[0026] 30, liquid inlet structure; 31, first pipe seat; 311, first cavity; 32, first pipe segment;

[0027] 40, liquid outlet structure; 41, second tube seat; 411, second cavity; 42, second tube segment;

[0028] 51, partition; 52, first convex rib; 53, second convex rib;

[0029] 60, second sealing part;

[0030] 70, positioning part; 71, flat segment; 72, bent segment;

[0031] 01, battery module; 02, middle liquid cooling plate; 03, end liquid cooling plate;

[0032] 04, module fixing part; 041, support column; 042, connecting plate; 043, fastener;

[0033] 05, heat conduction layer.

[0034] Embodiments of the present application

[0035] As shown in FIGS. 1-5, the present application provides a liquid cooling plate, which comprises a body part 10, a sealing part, a liquid inlet structure 30 and a liquid outlet structure 40. The body part 10 has a heat exchange cavity 101 and an opening structure in communication with each other, and the opening structure is arranged at the side of the heat exchange cavity 101. At least part of the sealing part is located in the opening structure to seal and support the opening structure. The liquid inlet structure 30 is arranged on the sealing part, and the liquid inlet structure 30 is in communication with the heat exchange cavity 101. The liquid outlet structure 40 is arranged on the sealing part, and the liquid outlet structure 40 is in communication with the heat exchange cavity 101.

[0036] According to the technical scheme of the present application, the liquid inlet structure 30 and the liquid outlet structure 40 are integrated on the sealing part, and then the sealing part is installed at the opening structure to seal the opening structure, so that the liquid inlet structure 30 and the liquid outlet structure 40 are in communication with the heat exchange cavity. In this way, it can avoid setting two through holes respectively matched with the liquid inlet structure and the liquid outlet structure on the body part, reducing the possibility of stress concentration of the body part. Moreover, the sealing part integrated with the liquid inlet structure 30 and the liquid outlet structure 40 is installed at the opening structure, and the assembly process is relatively simple. In addition, at least part of the sealing part is located in the opening structure, which can reduce the possibility of deformation at the opening structure and ensure the structural stability of the liquid cooling plate.

[0037] In the present scheme, the body part 10 comprises a first plate body 11 and a second plate body 12, and the second plate body 12 is arranged opposite to the first plate body 11. The heat exchange cavity 101 is formed between the second plate body 12 and the first plate body 11.

[0038] In the embodiment, at least part of the end of the first plate body 11 along the first direction is bent away from the second plate body 12 and forms a positioning portion 70, which is arranged to be positioned and matched with the battery module. In this way, the positioning and matching of the liquid cooling plate and the battery module 01 can be facilitated, and the assembly of the battery pack can be facilitated.

[0039] It can be understood that the first plate body 11 has two ends along the first direction, and the two ends extend along the second direction respectively, and the second direction is perpendicular to the first direction. The two ends of the first plate body 11 along the first direction are bent away from the second plate body 12 respectively and form two positioning portions 70 respectively. In FIG. 1, the X direction is the first direction, and the Y direction is the second direction.

[0040] Alternatively, at least part of the end of the second plate body 12 along the first direction is bent away from the first plate body 11 and forms a positioning portion 70, which is arranged to be positioned and matched with the battery module. The second plate body 12 has two ends along the first direction, and the two ends of the second plate body 12 along the first direction extend along the second direction respectively, and the second direction is perpendicular to the first direction. The two ends of the second plate body 12 along the first direction are bent away from the first plate body 11 respectively and form two positioning portions 70 respectively. That is, the two positioning portions 70 of the first plate body 11 are arranged opposite to the two positioning portions 70 on the second plate body 12 in the thickness direction of the liquid cooling plate. In this way, when the liquid cooling plate of the present scheme is applied to the scene of stacking multiple groups of battery modules, one liquid cooling plate can be arranged between two adjacent groups of battery modules, the positioning portion 70 on the first plate body 11 is arranged to be positioned and matched with the battery module on the side of the first plate body 11 away from the second plate body 12. The positioning portion 70 on the second plate body 12 is arranged to be positioned and matched with the battery module on the side of the second plate body 12 away from the first plate body 11.

[0041] As shown in FIG. 6, in some embodiments of the present scheme, one of the first plate body 11 and the second plate body 12 is provided with a positioning portion 70.

[0042] As shown in FIG. 2, specifically, the positioning portion 70 and the other plate body form an opening structure, the positioning portion 70 includes a flat section 71 and a bent section 72 connected to each other along the first direction, the flat section 71 and the other plate body form a displacement slot 103, the displacement slot 103 is located at the end of the extension direction of the opening structure, the end of the displacement slot 103 away from the opening structure extends to the side surface of the body portion 10, and the displacement slot 103 is arranged to be penetrated by the plugging portion. In this way, at least part of the plugging portion can be penetrated in the opening structure, and the convenience of assembling the device can be improved.

[0043] Optionally, the bending section 72 has an included angle with the first plate body 11, and the bending section 72 is arranged to be welded with the end plate of the battery module. In this way, the bending section 72 of the device can not only be positioned and matched with the end plate of the battery module, but also be fixedly connected with the end plate through welding, thereby improving the stability of the connection between the liquid cooling plate and the battery module.

[0044] As shown in FIGS. 1-6, in the embodiment of the present scheme, the opening structure includes a first opening 102 and a second opening 104, which are oppositely arranged at two ends of the heat exchange cavity 101 along a first direction; the blocking part includes a first blocking part 20 and a second blocking part 60, at least part of the first blocking part 20 is arranged in the first opening 102 to block and support the first opening 102, and at least part of the second blocking part 60 is arranged in the second opening 104 to block and support the second opening 104; the liquid inlet structure 30 is arranged on one of the first blocking part 20 and the second blocking part 60, and the liquid outlet structure 40 is arranged on the other one of the first blocking part 20 and the second blocking part 60. In this way, the body part 10 can be formed by pultrusion, that is, the body part is an extruded profile, thereby improving the structural strength, structural stability and sealing performance of the body part 10.

[0045] In the embodiment of the present scheme, at least part of the first blocking part 20 is located in the first opening 102 to support the first opening 102. In this way, the structural stability of the liquid cooling plate in this area can be enhanced, and the deformation caused by the pressure of the cooling liquid or external factors can be reduced.

[0046] Optionally, the first blocking part 20 is welded with the body part 10. In this way, the sealing performance and the stability of the connection between the first blocking part 20 and the body part 10 can be ensured.

[0047] Specifically, as shown in FIG. 3, in the embodiment of the present scheme, the first blocking part 20 includes a first blocking rod, the first blocking rod is provided with a first through hole and a second through hole, and the first through hole and the second through hole are spaced apart along the length direction of the first blocking rod. The liquid inlet structure 30 is arranged at the first through hole and the first interface communicates with the first through hole, and the liquid outlet structure 40 is arranged at the second through hole and the second interface communicates with the second through hole. In this way, the structure is simple, and the first blocking part 20 can easily block and support the first opening 102.

[0048] As shown in FIG. 6, in the embodiment of the present scheme, the second blocking part 60 includes a second blocking rod, the second blocking rod is embedded in the second opening 104 and supports the second opening 104, and the second blocking rod is welded with the body part 10.

[0049] As shown in FIG. 4, optionally, the liquid cooling plate further comprises a partition 51. The partition 51 is arranged in the heat exchange cavity 101 to separate the heat exchange cavity 101 into an independent liquid inlet cavity and a liquid outlet cavity. The liquid inlet structure 30 is in communication with the liquid inlet cavity, and the liquid outlet structure 40 is in communication with the liquid outlet cavity. The partition 51 and the body part 10 form a communication passage 1011 therebetween, and the liquid inlet cavity and the liquid outlet cavity are in communication through the communication passage 1011. The independent liquid inlet cavity and the liquid outlet cavity help to optimize the flow of the cooling liquid in the liquid cooling plate and improve the cooling effect.

[0050] Optionally, the communication passage 1011 is in communication with one end of the liquid inlet cavity away from the liquid inlet structure 30 and one end of the liquid outlet cavity away from the liquid outlet structure 40, respectively. By arranging the communication passage 1011 at the end away from the liquid inlet and outlet structures, the residence time of the cooling liquid in the heat exchange cavity can be increased, and the heat exchange efficiency can be improved.

[0051] Specifically, the partition 51 comprises a partition rib, and the extension direction of the partition rib is perpendicular to the extension direction of the first side wall. One end of the partition rib is connected with the first blocking part 20, and the other end has a gap with the side of the heat exchange cavity 101 away from the first opening 102 and forms the communication passage 1011. In this way, the structure is simple, and the separation of the liquid inlet cavity and the liquid outlet cavity is facilitated.

[0052] Optionally, the liquid inlet cavity comprises a plurality of liquid inlet passages 1012 arranged independently, one end of each of the plurality of liquid inlet passages 1012 is in communication with the liquid inlet structure 30, and the other end of each of the plurality of liquid inlet passages 1012 is in communication with the communication passage 1011. The liquid outlet cavity comprises a plurality of liquid outlet passages 1013 arranged independently, one end of each of the plurality of liquid outlet passages 1013 is in communication with the liquid outlet structure 40, and the other end of each of the plurality of liquid outlet passages 1013 is in communication with the communication passage 1011. In this way, the uniformity of the flow of the fluid in the liquid inlet cavity and the liquid outlet cavity can be improved, and the cooling effect can be improved.

[0053] Optionally, the heat exchange cavity 101 further comprises a first flow collection passage 1014, a second flow collection passage 1015, a third flow collection passage 1016, and a fourth flow collection passage 1017. The first flow collection passage 1014 is arranged on the side of the plurality of liquid inlet passages 1012 close to the liquid inlet structure 30, the first flow collection passage 1014 is in communication with the liquid inlet structure 30, and the first end of each of the plurality of liquid inlet passages 1012 is in communication with the first flow collection passage 1014. In this way, the uniformity of the fluid distribution can be improved, the uniformity of the fluid flow can be improved, and the cooling effect can be improved.

[0054] Similarly, the second converging channel 1015 is arranged on the side of the plurality of liquid inlet channels 1012 away from the liquid inlet structure 30, the second ends of the plurality of liquid inlet channels 1012 are respectively communicated with the second converging channel 1015, and the second converging channel 1015 is communicated with the communicating channel 1011; the third converging channel 1016 is arranged on the side of the plurality of liquid outlet channels 1013 close to the liquid outlet structure 40, the third converging channel 1016 is communicated with the liquid outlet structure 40, and the first ends of the plurality of liquid outlet channels 1013 are respectively communicated with the third converging channel 1016; and the fourth converging channel 1017 is arranged on the side of the plurality of liquid outlet channels 1013 away from the liquid outlet structure 40, the second ends of the plurality of liquid outlet channels 1013 are respectively communicated with the fourth converging channel 1017, and the fourth converging channel 1017 is communicated with the communicating channel 1011.

[0055] Specifically, the liquid cooling plate further comprises a first protruding rib 52 arranged in the liquid inlet cavity to divide the liquid inlet cavity into a plurality of independent liquid inlet channels 1012.

[0056] The specific shape and number of the first protruding rib 52 are not limited in the scheme.

[0057] The first protruding rib 52 is at least one.

[0058] In the embodiment of the scheme, a plurality of first protruding ribs 52 are arranged, the plurality of first protruding ribs 52 are distributed at intervals along the length direction of the first opening 102, and one liquid inlet channel 1012 is formed between two adjacent first protruding ribs 52.

[0059] In the embodiment of the scheme, the first protruding rib 52 is linear, the first protruding rib 52 extends along the perpendicular direction of the first opening 102, and the two ends of the first protruding rib 52 are respectively spaced apart from the two side walls of the liquid inlet cavity, and the two ends of the plurality of first protruding ribs 52 are respectively spaced apart from the side walls of the liquid inlet cavity to form the first converging channel 1014 and the second converging channel 1015.

[0060] In other embodiments of the scheme, the first protruding rib 52 can be arranged in a wave shape.

[0061] Optionally, the liquid cooling plate further comprises a second protruding rib 53 arranged in the liquid outlet cavity to divide the liquid outlet cavity into a plurality of independent liquid outlet channels 1013.

[0062] The specific shape and number of the second protruding rib 53 are not limited in the scheme.

[0063] The second protruding rib 53 is at least one.

[0064] In the embodiment of the scheme, a plurality of second protruding ribs 53 are arranged, the plurality of second protruding ribs 53 are distributed at intervals along the length direction of the first opening 102, and one liquid outlet channel 1013 is formed between two adjacent second protruding ribs 53.

[0065] In the embodiment of the present scheme, the second ribs 53 are linear, the second ribs 53 extend along the vertical direction of the first opening 102, and the two ends of the second ribs 53 are spaced apart from the two side walls of the liquid outlet cavity, respectively. The two ends of the plurality of second ribs 53 are respectively formed with a third flow channel 1016 and a fourth flow channel 1017 between the side walls of the liquid outlet cavity.

[0066] In other embodiments of the present scheme, the second ribs 53 can be arranged in a wave shape.

[0067] As shown in FIG. 3, optionally, the liquid inlet structure 30 includes a first pipe base 31 and a first pipe segment 32 connected to each other, the first pipe base 31 is arranged on the blocking part, the first pipe base 31 has a first chamber 311 and a first interface which are in communication with each other, the first interface is in communication with the heat exchange cavity 101, the first pipe segment 32 and the first interface are respectively in communication with the first chamber 311, and the first pipe segment 32 and the first interface are located on different surfaces of the first pipe base 31. The first pipe segment 32 serves as a guiding part for fluid entering the liquid cooling plate from the outside, which helps to control the flow direction and speed of the fluid. The first pipe base 31 can serve as a fluid buffer zone to reduce the possibility of fluid directly impacting the heat exchange cavity 101, thereby avoiding damage caused by fluid impact. Moreover, the first pipe segment 32 and the first interface are located on different surfaces of the first pipe base 31, which is arranged in this way to make the structural design of the liquid inlet structure 30 reasonable, avoiding the possibility of mutual interference between the first pipe segment 32 and the body part 10, and improving the convenience of assembling the liquid inlet structure 30.

[0068] In the embodiment of the present scheme, the first pipe base 31 is substantially in a cuboid shell structure, the first interface is arranged on the side surface of the first pipe base 31, and the first pipe base 31 is arranged on one of the surfaces of the first pipe base 31. This arrangement is simple in structure and easy to process.

[0069] In other embodiments of the present scheme, the first pipe base 31 can be arranged in other shell structures. For example, it can be arranged in a cylindrical shell structure, the first interface can be arranged on the end surface of the first pipe base 31, and the first pipe segment 32 can be arranged on the peripheral surface of the first pipe base 31.

[0070] As shown in FIG. 3, optionally, the liquid outlet structure 40 comprises a second pipe base 41 and a second pipe segment 42 connected with each other, the second pipe base 41 is arranged on the blocking part, the second pipe base 41 has a second cavity 411 and a second interface which are communicated with each other, the second pipe segment 42 and the second interface are respectively communicated with the second cavity 411, and the second pipe segment 42 and the second interface are located on different surfaces of the second pipe base 41. In the embodiment of the present application, the shape of the liquid outlet structure 40 is the same as that of the liquid inlet structure 30. In this way, the types of components can be reduced, and the assembly efficiency of the liquid inlet structure 30 and the liquid outlet structure 40 can be improved.

[0071] As shown in FIGS. 7-9, the application further provides a battery pack comprising the battery module 01 and the liquid cooling plate described above, the battery module 01 is provided with at least two groups; the liquid cooling plate is stacked with the battery module 01; wherein the liquid cooling plate comprises a middle liquid cooling plate 02 and an end liquid cooling plate 03, one middle liquid cooling plate 02 is arranged between two adjacent groups of battery modules 01; the end liquid cooling plate 03 is arranged on the side of the battery module 01 at the end away from the middle liquid cooling plate 02. In this way, the battery module 01 can be liquid-cooled by the middle liquid cooling plate 02 and the end liquid cooling plate 03 respectively, and the liquid cooling effect of the battery module 01 is improved.

[0072] Optionally, the edges of the two sides of the middle liquid cooling plate 02 are respectively provided with positioning parts 70, the positioning parts 70 are located on the outer sides of the corresponding battery modules 01 and are respectively positioned and matched with the battery modules 01. In this way, the positioning effect of the battery module 01 and the stability of the battery module 01 are improved.

[0073] As shown in FIGS. 9-11, optionally, the battery module 01 comprises a cell and two end plates, the cell is located between the two end plates, the battery module 01 comprises a module fixing part 04, the module fixing part 04 is arranged on the same side of the end plates of the plurality of groups of battery modules 01, and the module fixing part 04 comprises a support column 041, a connecting plate 042 and a fastener 043. The connecting plate 042 is arranged on the support column 041, at least one connecting plate 042 is arranged on each end plate, the connecting plate 042 is parallel to and abuts against the end plate, and the connecting plate 042 is connected with the end plate by the fastener 043.

[0074] In this way, the structure design is reasonable, the contact area between the module fixing part 04 and the end plate can be ensured, and assembly is facilitated.

[0075] Optionally, the positioning part 70 protrudes outward from the end plate. The side of the support column 041 close to the battery module 01 is provided with an avoiding groove, which penetrates the support column 041 along the vertical direction of the support column 041, and is arranged corresponding to the positioning part 70, and is arranged to avoid the positioning part 70. In this way, the stability of the abutment between the connecting plate 042 and the end plate can be improved, and the possibility of a gap between the end plate and the connecting plate 042 can be reduced.

[0076] Specifically, in the embodiment of the present scheme, the liquid inlet structure 30, the liquid outlet structure 40, and the module fixing part 04 and the end plate are located on the same side of the battery pack. In this way, the assembly and maintenance of the battery pack can be facilitated.

[0077] As shown in FIG. 8, optionally, the battery pack further comprises a heat-conducting layer 05 arranged between the liquid cooling plate and the battery module 01. The arrangement of the heat-conducting layer 05 can improve the heat exchange effect between the liquid cooling plate and the battery module 01.

[0078] It can be understood that the side of the end liquid cooling plate 03 close to the battery module 01 is provided with a heat-conducting layer 05, and the two sides of the middle liquid cooling plate 02 are respectively provided with a heat-conducting layer 05.

[0079] In the embodiment of the present scheme, the battery pack further comprises a limiting strip arranged on the surface of the liquid cooling plate close to the battery module 01, and the heat-conducting layer 05 comprises heat-conducting glue coated on the surface of the liquid cooling plate, and the limiting strip is in limiting cooperation with the heat-conducting glue. In this way, the possibility of uneven coating or deformation of the heat-conducting glue can be reduced or avoided, and the heat-conducting effect of the heat-conducting glue can be improved.

Claims

1. A liquid cooling plate, comprising: a body portion (10) having a heat exchange cavity (101) and an opening structure in communication with each other, the opening structure being arranged on a side of the heat exchange cavity (101); a blocking portion, at least part of the blocking portion being located in the opening structure to block and support the opening structure; a liquid inlet structure (30) arranged on the blocking portion, the liquid inlet structure (30) being in communication with the heat exchange cavity (101); a liquid outlet structure (40) arranged on the blocking portion, the liquid outlet structure (40) being in communication with the heat exchange cavity (101).

2. The liquid cold plate of claim 1, wherein, The body portion (10) comprises: a first plate body (11) and a second plate body (12), the second plate body (12) and the first plate body (11) being oppositely spaced apart, and the heat exchange cavity (101) being formed between the second plate body (12) and the first plate body (11); at least part of an end of the first plate body (11) in a first direction is bent away from the second plate body (12) and forms a positioning portion (70), the positioning portion (70) being arranged to be positioned in cooperation with a battery module; and / or at least part of an end of the second plate body (12) in a first direction is bent away from the first plate body (11) and forms a positioning portion (70), the positioning portion (70) being arranged to be positioned in cooperation with a battery module.

3. The liquid cold plate of claim 2, wherein, The positioning portion (70) and the other plate body form the opening structure, the positioning portion (70) comprises a straight segment (71) and a bent segment (72) connected to each other in the first direction, a clearance slot (103) is formed between the straight segment (71) and the other plate body, the clearance slot (103) is located at an end of the opening structure in an extension direction, an end of the clearance slot (103) away from the opening structure extends to a side surface of the body portion (10), and the clearance slot (103) is arranged for the blocking portion to pass through.

4. The liquid cold plate of claim 2, wherein, The positioning portion (70) comprises a bent segment (72), an included angle is formed between the bent segment (72) and the first plate body (11), and the bent segment (72) is arranged to be welded with an end plate of the battery module.

5. The liquid cold plate of claim 1, wherein, The opening structure comprises a first opening (102) and a second opening (104), the first opening (102) and the second opening (104) are oppositely arranged at two ends of the heat exchange cavity (101) in the first direction; the blocking portion comprises a first blocking portion (20) and a second blocking portion (60), at least part of the first blocking portion (20) passes through the first opening (102) to block and support the first opening (102), and at least part of the second blocking portion (60) passes through the second opening (104) to block and support the second opening (104); the liquid inlet structure (30) is arranged on one of the first blocking portion (20) and the second blocking portion (60), and the liquid outlet structure (40) is arranged on one of the first blocking portion (20) and the second blocking portion (60).

6. The liquid cold plate of claim 1, wherein, The liquid cooling plate further comprises: A partition (51) is arranged in the heat exchange cavity (101) to separate the heat exchange cavity (101) into an independent liquid inlet cavity and a liquid outlet cavity, the liquid inlet structure (30) is communicated with the liquid inlet cavity, the liquid outlet structure (40) is communicated with the liquid outlet cavity, a communication channel (1011) is formed between the partition (51) and the body portion (10), and the liquid inlet cavity and the liquid outlet cavity are communicated through the communication channel (1011).

7. The liquid cooling plate according to any one of claims 1 to 6, wherein, The liquid inlet structure (30) comprises a first pipe base (31) and a first pipe section (32) connected with each other, the first pipe base (31) is arranged on the blocking portion, the first pipe base (31) has a first cavity (311) and a first interface communicated with each other, the first interface is communicated with the heat exchange cavity (101), the first pipe section (32) and the first interface are respectively communicated with the first cavity (311), and the first pipe section (32) and the first interface are located on different surfaces of the first pipe base (31); and / or, The liquid outlet structure (40) comprises a second pipe base (41) and a second pipe section (42) connected with each other, the second pipe base (41) is arranged on the blocking portion, the second pipe base (41) has a second cavity (411) and a second interface communicated with each other, the second interface is communicated with the second cavity (411), the second pipe section (42) and the second interface are respectively communicated with the second cavity (411), and the second pipe section (42) and the second interface are located on different surfaces of the second pipe base (41).

8. A battery pack, comprising: A battery module (01), the battery module (01) is provided with at least two groups; The liquid cooling plate according to any one of claims 1 to 7, the liquid cooling plate is stacked with the battery module (01); The liquid cooling plate comprises a middle liquid cooling plate (02) and an end liquid cooling plate (03), one middle liquid cooling plate (02) is arranged between two adjacent groups of battery modules (01); and the end liquid cooling plate (03) is arranged on the side of the battery module (01) at the end and away from the middle liquid cooling plate (02).

9. The battery pack of claim 8, wherein, Positioning portions (70) are arranged at the edges of the two sides of the middle liquid cooling plate (02) respectively, the positioning portions (70) are located outside the corresponding battery modules (01) and are positioned and matched with the battery modules (01) respectively.

10. The battery pack of claim 8, wherein, The battery module (01) comprises a cell and two end plates, the cell is located between the two end plates, the battery module (01) comprises a module fixing portion (04), the module fixing portion (04) is arranged on the same side of the end plates of a plurality of groups of battery modules (01), and the module fixing portion (04) comprises: A support column (041); A connecting plate (042) is arranged on the support column (041), at least one connecting plate (042) is arranged corresponding to each end plate, the connecting plate (042) is parallel to and abuts against the end plate. a fastener (043) by which the connecting plate (042) is connected with the end plate.

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