Liquid cooling plate and liquid cooling box

Abstract

The utility model provides a liquid cooling plate and a liquid cooling box, the liquid cooling plate comprises a cold plate main body and a frame main body, the cold plate main body comprises a base plate and a runner plate which is arranged below the base plate and is laminated with the base plate, the base plate comprises a bottom plate, a side wall which extends upwards along the circumferential direction of the bottom plate and a flange which extends outwards from the top of the side wall, the side wall and the bottom plate jointly form a downwards-sunken containing cavity, and the runner plate comprises a pipeline part formed in a downwards-sunken mode and an attaching part attached to the lower surface of the bottom plate. The frame body comprises a longitudinal beam assembly and a cross beam assembly, the turned-over edge is connected to the longitudinal beam assembly and the cross beam assembly in a bridging mode, and the containing cavity is located in the frame body defined by the longitudinal beam assembly and the cross beam assembly. Compared with the prior art, the base plate adopts the downward concave structure, the overall structural strength is enhanced, the battery module is placed more stably and reliably, the cold plate main body, the box body and the frame main body are matched without gaps due to the arrangement of the turnup edges, and the air leakage risk of the gap between the frame main body and the cold plate main body is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries and energy storage, in particular to a liquid cooling plate and a liquid cooling box. Background Art

[0002] In recent years, the new energy industry has developed rapidly, and battery energy storage technology has become the mainstream solution for new energy technology. With the increasing requirements for battery energy density and working stability, the energy storage battery capacity without unified standard constraints has soared from the initial 280Ah and 314Ah to 500Ah+ wildly. To meet the market demand, a liquid-cooled lower box body with a high-strength steel profiling frame structure has emerged as the times require. The conventional liquid cooling box adopts a structural design of an upper box body cooperating with a liquid-cooled lower box body. The liquid-cooled lower box body is an important part of the liquid cooling system, playing the roles of cooling, supporting, bearing, and protecting. The conventional liquid-cooled lower box body adopts a structural design of a flat liquid cooling plate cooperating with a bottom reinforcement plate. The frame is located between the box body and the liquid cooling plate. The connection at the frame is connected by a welding process, and a cross beam is used to horizontally strengthen the frame stiffness. The cumbersome welding route, grinding, and shaping processes invisibly increase the cost of the box body; and the frame needs to reserve positions for glue coating grooves and sealing rubber strips, and a large amount of sealant needs to be coated and rubber strips need to be pasted during panel closing. Even if the airtightness of the liquid cooling box is ensured later, the appearance of the glue overflowing inside is not good-looking. The joint part adopts a through-box joint or a brazed joint protruding outside the frame. The former has problems such as complex machining structure, cumbersome assembly process, and high cost, while the latter will increase the size of the cold plate, invisibly increasing the size of the liquid cooling plate and the liquid cooling box.

[0003] Therefore, it is necessary to provide a liquid cooling plate and a liquid cooling box to overcome the defects existing above. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a liquid cooling plate and a liquid cooling box.

[0005] According to one aspect of the utility model, a liquid cooling plate is provided, including:

[0006] A cold plate main body, the cold plate main body includes a base plate and a flow channel plate stacked below the base plate. The base plate includes a bottom plate, a side wall extending upward along the circumference of the bottom plate, and a flange extending outward from the top of the side wall. The bottom plate, the side wall, and the flange are integrally formed. The side wall and the bottom plate jointly form a downwardly concave accommodation cavity. The flow channel plate includes a downwardly concave pipeline part and a fitting part fitting with the lower surface of the bottom plate;

[0007] The frame body, the frame body includes a longitudinal beam assembly and a cross beam assembly, the flanging is connected to the longitudinal beam assembly and the cross beam assembly, the longitudinal beam assembly is arranged along the length direction of the cold plate body, the cross beam assembly is arranged along the width direction of the cold plate body, the accommodation cavity is located inside the frame body surrounded by the longitudinal beam assembly and the cross beam assembly, and the flow channel plate is located inside the frame body.

[0008] Preferably, the longitudinal beam assembly includes a first longitudinal beam and a second longitudinal beam respectively arranged on both sides of the width direction of the substrate, the cross beam assembly includes a first cross beam and a second cross beam respectively arranged on both sides of the substrate, and the first longitudinal beam, the second longitudinal beam, the first cross beam and the second cross beam are respectively arranged at the bottom of the corresponding flanging for and connected to the corresponding flanging.

[0009] Preferably, the first longitudinal beam and the second longitudinal beam have the same structure, a first step portion is provided at the bottom of the first longitudinal beam, a second step portion is provided at the bottom of the second longitudinal beam, the first step portion and the second step portion are arranged oppositely, the first cross beam and the second cross beam have the same structure, a third step portion is provided at the bottom of the first cross beam, a fourth step portion is provided at the bottom of the second cross beam, the third step portion and the fourth step portion are arranged oppositely, and clamping groove portions for cooperating with the first step portion and the second step portion are provided at both ends of the first cross beam and the second cross beam.

[0010] Preferably, it further includes a strengthening assembly provided at the bottom of the flow channel plate, the strengthening assembly is placed inside the frame body, and includes a first transverse strengthening beam, a second transverse strengthening beam and a third transverse strengthening beam extending along the width direction of the flow channel plate and a longitudinal strengthening beam extending along the length direction of the flow channel plate, and the lowest surface contacted by the strengthening assembly is higher than the bottom surface of the frame body.

[0011] Preferably, the first transverse strengthening beam is arranged close to the first cross beam, the second transverse strengthening beam is arranged close to the second cross beam, the third transverse strengthening beam is arranged between the first transverse strengthening beam and the second transverse strengthening beam, the longitudinal strengthening beam is arranged between the flow channel plate and the third transverse strengthening beam, and both ends of the longitudinal strengthening beam are respectively arranged between the first transverse strengthening beam and the flow channel plate and between the second transverse strengthening beam and the flow channel plate.

[0012] Preferably, both ends of the first, second and third transverse strengthening beams are respectively fixed inside the first step portion and the second step portion, the side of the first transverse strengthening beam away from the second transverse strengthening beam is placed inside the third step portion, and the side of the second transverse strengthening beam away from the first transverse strengthening beam is placed inside the fourth step portion.

[0013] Preferably, it further includes a liquid inlet connector and a liquid outlet connector. The liquid inlet connector and the liquid outlet connector are arranged on the same side in the length direction of the cold plate body, and are both arranged on the lower surface of the flow channel plate. The liquid inlet connector and the liquid outlet connector are both fixed between the first cross beam and the first transverse reinforcing beam, and a through hole for the horizontal passage of the liquid inlet connector and the liquid outlet connector is provided on the first cross beam.

[0014] Preferably, the pipeline part includes a liquid inlet part and a liquid outlet part. The liquid inlet part and the liquid outlet part are located on the same side in the length direction of the flow channel plate. On the fitting part on the same side as the liquid inlet part, there are a first mounting hole for mounting the liquid inlet connector and a second mounting hole for mounting the liquid outlet connector. The first mounting hole is arranged close to the liquid inlet part, and the second mounting hole is arranged close to the liquid outlet part.

[0015] Preferably, a first convex part protruding upward is provided on the bottom plate corresponding to the liquid inlet part. A first transition cavity is formed between the first convex part and the flow channel plate. The projections of the first mounting hole and the liquid inlet part on the bottom plate coincide with the first convex part, and the first mounting hole communicates with the liquid inlet part through the first transition cavity.

[0016] Preferably, a second convex part protruding upward is provided on the bottom plate corresponding to the liquid outlet part. A second transition cavity is formed between the second convex part and the flow channel plate. The projections of the second mounting hole and the liquid outlet part on the bottom plate coincide with the second convex part, and the second mounting hole communicates with the liquid outlet part through the second transition cavity.

[0017] According to another aspect of the present invention, a liquid cooling box is provided, including the above-mentioned liquid cooling plate and a box cover covering the liquid cooling plate.

[0018] Compared with the prior art, the liquid cooling plate and the liquid cooling box provided by the present invention have the following beneficial effects:

[0019] Due to the adoption of the above technical solutions, the present invention has the advantages of high structural strength, good airtightness, low manufacturing cost, simple production process, and high processing efficiency. The substrate adopts a concave structure, which not only strengthens the overall structural strength, but also makes the placement of the battery module more stable and reliable. Moreover, the setting of the flanging makes the cooperation between the cold plate body, the box body and the frame body have no gaps, effectively solving the risk of air leakage in the gap between the frame body and the cold plate body, and there is no need to apply glue and use sealing rubber strips to ensure the airtightness of the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following further describes the present invention in detail with reference to the drawings and specific embodiments:

[0021] Figure 1 It is a three-dimensional view of the liquid cooling plate of the utility model;

[0022] Figure 2Exploded view of the liquid cooling plate of the utility model;

[0023] Figure 3 Front view of the liquid cooling plate of the utility model;

[0024] Figure 4 is Figure 3 Cross-sectional view taken along line A-A of

[0025] Figure 5 Stereogram of the flow channel plate of the utility model;

[0026] Figure 6 Rear stereogram of the liquid cooling plate of the utility model;

[0027] Figure 7 Stereogram of the frame main body of the utility model;

[0028] Figure 8 Stereogram of the longitudinal beam assembly of the utility model;

[0029] Figure 9 Stereogram of the cross beam assembly of the utility model;

[0030] Figure 10 Stereogram of the liquid cooling box of the utility model.

[0031] Explanation of the reference numerals in the drawings: 1. Cold plate main body, 11. Substrate, 111. Bottom plate, 1111. First convex part, 1112. Second convex part, 1113. First transition cavity, 112. Side wall, 113. Flange, 114. Accommodation cavity, 12. Flow channel plate, 121. Pipeline part, 1211. Liquid inlet part, 1212. Liquid outlet part, 122. Fitting part, 1221. First mounting hole, 1222. Second mounting hole, 2. Frame main body, 21. Longitudinal beam assembly, 211. First longitudinal beam, 2111. First step part, 212. Second longitudinal beam, 2121. Second step part, 22. Cross beam assembly, 221. First cross beam, 2211. Third step part, 2212. Through hole, 222. Second cross beam, 2221. Fourth step part, 223. Card slot part, 2231. Notch, 2232. Flange, 3. Reinforcement assembly, 31. First transverse reinforcement beam, 32. Second transverse reinforcement beam, 33. Third transverse reinforcement beam, 34. Longitudinal reinforcement beam, 4. Liquid inlet joint, 5. Liquid outlet joint, 6. Module beam, 7. Box cover. Detailed implementation manners

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0034] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0035] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0038] See also Figure 1 and Figure 2, this embodiment discloses a liquid cooling plate, which includes a cold plate main body 1, a frame main body 2, a reinforcing component 3, a liquid inlet joint 4 and a liquid outlet joint 5. The cold plate main body 1 includes a base plate 11 and a flow channel plate 12 disposed below the base plate 11 and stacked with the base plate 11. The base plate 11 includes a bottom plate 111, side walls 112 extending upward along the circumference of the bottom plate 111, and flanges 113 extending outward from the top of the side walls 112. The bottom plate 111, the side walls 112 and the flanges 113 are integrally formed, and the side walls 112 and the bottom plate 111 together form a downwardly concave accommodation cavity 114. Four module beams 6 are fixed in the accommodation cavity 114, and the module beams 6 extend along the width direction of the bottom plate 111. Among them, two module beams 6 are respectively disposed at both ends of the bottom plate 111, and the other two module beams 6 are disposed in the middle of the bottom plate 111, and the module beams 6 are all fixed on the bottom plate 111 for fixing the battery module.

[0039] The flow channel plate 12 includes a pipe portion 121 formed by downward depression and a fitting portion 122 that fits against the lower surface of the bottom plate 111. The flow channel plate 12 is formed by stamping a flat plate, and its pipe portion 121 fits against the base plate 11 to form a sealed cooling flow channel, so that the bottom of the cold plate main body 1 has a cooling and heat dissipation effect on the battery module.

[0040] See Figure 2 , Figure 3 , Figure 6 and Figure 7 , the frame main body 2 includes a longitudinal beam assembly 21 and a cross beam assembly 22 disposed below the flange 113. The longitudinal beam assembly 21 is disposed along the length direction of the cold plate main body 1, and the cross beam assembly 22 is disposed along the width direction of the cold plate main body 1. The accommodation cavity 114 is located within the frame main body 2 surrounded by the longitudinal beam assembly 21 and the cross beam assembly 22.

[0041] The longitudinal beam assembly 21 includes a first longitudinal beam 211 and a second longitudinal beam 212 respectively disposed on both sides of the base plate 11 in the width direction, and the cross beam assembly 22 includes a first cross beam 221 and a second cross beam 222 respectively disposed on both sides of the base plate 11. The first longitudinal beam 211, the second longitudinal beam 212, the first cross beam 221 and the second cross beam 222 are respectively disposed at the bottom of the corresponding flange 113 and fixed to the corresponding flange 113. A horizontally extending waist-shaped through hole 2212 is formed in the first cross beam 221.

[0042] See Figure 7 , Figure 8 and Figure 9, the first longitudinal beam 211 and the second longitudinal beam 212 have the same structure. A first stepped portion 2111 is provided at the bottom of the first longitudinal beam 211, and a second stepped portion 2121 is provided at the bottom of the second longitudinal beam 212. The first stepped portion 2111 and the second stepped portion 2121 are arranged opposite to each other. The first cross beam 221 and the second cross beam 222 have the same structure. A third stepped portion 2211 is provided at the bottom of the first cross beam 221, and a fourth stepped portion 2221 is provided at the bottom of the second cross beam 222. The third stepped portion 2211 and the fourth stepped portion 2221 are arranged opposite to each other. Card slot portions 223 are provided at both ends of the first cross beam 221 and the second cross beam 222 and are adapted to the first stepped portion 2111 and the second stepped portion 2121. The card slot portion 223 includes a notch 2231 for accommodating the first stepped portion 2111 or the second stepped portion 2121 and a flange 2232 for supporting the first stepped portion 2111 or the second stepped portion 2121. The first stepped portion 2111, the second stepped portion 2121, the third stepped portion 2211, and the fourth stepped portion 2221 jointly enclose a stepped internal space.

[0043] See Figure 2 and Figure 6 , the strengthening component 3 is arranged at the bottom of the flow channel plate 12 and placed inside the frame body 2. The strengthening component 3 includes a first transverse strengthening beam 31, a second transverse strengthening beam 32, and a third transverse strengthening beam 33 that extend along the width direction of the flow channel plate 12 and a longitudinal strengthening beam 34 that extends along the length direction of the flow channel plate 12. The lowest surface contacted by the strengthening component 3 is higher than the bottom surface of the frame body 2, that is, the strengthening component 3 is completely placed inside the stepped internal space and does not protrude from the plane where the bottom surface of the frame body 2 is located. The accommodation cavity 114 of the cold plate body 1 and the strengthening component 3 are both located inside the frame body 2, and the frame body 2 plays a protective role for both of them to prevent the outside from knocking, squeezing, etc. and causing damage.

[0044] The first transverse strengthening beam 31 is arranged close to the first cross beam 221, the second transverse strengthening beam 32 is arranged close to the second cross beam 212, and the third transverse strengthening beam 33 is arranged between the first transverse strengthening beam 31 and the second transverse strengthening beam 32. The longitudinal strengthening beam 34 is arranged between the flow channel plate 12 and the third transverse strengthening beam 33, and both ends of the longitudinal strengthening beam 34 are respectively arranged between the first transverse strengthening beam 31 and the flow channel plate 12 and between the second transverse strengthening beam 32 and the flow channel plate 12. In this embodiment, there is 1 longitudinal strengthening beam 34 and it is located in the middle of the width direction of the third transverse strengthening beam 33. In other embodiments, multiple mutually parallel longitudinal strengthening beams 34 can be arranged according to the strength requirements of the liquid cooling plate.

[0045] Both ends of the first, second, and third transverse strengthening beams 31, 32, 33 are respectively fixed inside the first stepped portion 2111 and the second stepped portion 2121, and the side of the second transverse strengthening beam 32 away from the first transverse strengthening beam 31 is placed inside the fourth stepped portion 2221.

[0046] See Figure 6 , the liquid inlet joint 4 and the liquid outlet joint 5 are arranged on the same side of the length direction of the cold plate body 1, and are both located on the side where the first cross beam 221 is located. The liquid inlet joint 4 and the liquid outlet joint 5 are both arranged on the lower surface of the flow channel plate 12 and are both fixed between the first cross beam 221 and the first transverse strengthening beam 31. The liquid inlet joint 4 and the liquid outlet joint 5 horizontally pass through the waist-shaped through hole 2212 and extend outward.

[0047] See Figure 5 , the pipeline part 121 includes a liquid inlet part 1211 and a liquid outlet part 1212. The liquid inlet part 1211 and the liquid outlet part 1212 are located on the same side of the length direction of the flow channel plate 12 and are located on the side close to the side where the first cross beam 221 is located. On the fitting part 122 close to the side where the first cross beam 221 is located, there are a first mounting hole 1221 for mounting the liquid inlet joint 4 and a second mounting hole 1222 for mounting the liquid outlet joint 5. The first mounting hole 1221 is located at the front end of the liquid inlet part 1211, and the second mounting hole 1222 is located at the front end of the liquid outlet part 1212.

[0048] See Figure 4 , on the bottom plate 111, there is a first convex part 1111 protruding upward corresponding to the liquid inlet part 1211. A first transition cavity 1113 is formed between the first convex part 1111 and the flow channel plate 12. The projections of the first mounting hole 1221 and the liquid inlet part 1211 on the bottom plate 111 coincide with the first convex part 1111, and the first mounting hole 1221 is communicated with the liquid inlet part 1211 through the first transition cavity 1113; on the bottom plate 111, there is a second convex part 1112 protruding upward corresponding to the liquid outlet part 1212. A second transition cavity is formed between the second convex part 1112 and the flow channel plate 12. The projections of the second mounting hole 1222 and the liquid outlet part 1212 on the bottom plate 111 coincide with the second convex part 1112, and the second mounting hole 1222 is communicated with the liquid outlet part 1212 through the second transition cavity. The liquid inlet joint 4 and the liquid outlet joint 5 are arranged below the flow channel plate 12 and are integrally brazed, solving the problems of the complex machining structure and the cumbersome assembly process of using through-box joints.

[0049] See Figure 10 , this embodiment also discloses a liquid cooling box, including the above-mentioned liquid cooling plate and a box cover 7 covering the liquid cooling plate.

[0050] It is obvious to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover the modifications and variations of the present invention falling within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A liquid cooling plate, characterized in that, Comprising: A cold plate main body, the cold plate main body includes a base plate and a flow channel plate disposed below the base plate and stacked with the base plate. The base plate includes a bottom plate, side walls extending upward along the circumference of the bottom plate, and flanges extending outward from the top of the side walls. The bottom plate, side walls, and flanges are integrally formed. The side walls and the bottom plate together form a downwardly concave accommodation cavity. The flow channel plate includes a pipe portion formed by downward depression and a fitting portion that fits against the lower surface of the bottom plate. A frame main body, the frame main body includes a longitudinal beam assembly and a cross beam assembly. The flange is supported on the longitudinal beam assembly and the cross beam assembly. The longitudinal beam assembly is arranged along the length direction of the cold plate main body, and the cross beam assembly is arranged along the width direction of the cold plate main body. The accommodation cavity is located within the frame main body surrounded by the longitudinal beam assembly and the cross beam assembly, and the flow channel plate is located within the frame main body.

2. The liquid cooling plate according to claim 1, characterized in that, The longitudinal beam assembly includes a first longitudinal beam and a second longitudinal beam respectively disposed on both sides of the base plate in the width direction. The cross beam assembly includes a first cross beam and a second cross beam respectively disposed on both sides of the base plate. The first longitudinal beam, the second longitudinal beam, the first cross beam, and the second cross beam are respectively disposed at the bottom of the corresponding flange and connected to the corresponding flange.

3. The liquid cooling plate according to claim 2, wherein The first longitudinal beam and the second longitudinal beam have the same structure. The bottom of the first longitudinal beam is provided with a first step portion, and the bottom of the second longitudinal beam is provided with a second step portion. The first step portion and the second step portion are oppositely arranged. The first cross beam and the second cross beam have the same structure. The bottom of the first cross beam is provided with a third step portion, and the bottom of the second cross beam is provided with a fourth step portion. The third step portion and the fourth step portion are oppositely arranged. Both ends of the first cross beam and the second cross beam are provided with card slot portions that cooperate with the first step portion and the second step portion.

4. The liquid cooling plate according to claim 3, characterized in that, It further includes a strengthening assembly disposed at the bottom of the flow channel plate. The strengthening assembly is placed within the frame main body and includes a first transverse strengthening beam, a second transverse strengthening beam, and a third transverse strengthening beam extending along the width direction of the flow channel plate, and a longitudinal strengthening beam extending along the length direction of the flow channel plate. The lowest surface contacted by the strengthening assembly is higher than the bottom surface of the frame main body.

5. The liquid cooling plate according to claim 4, characterized in that, The first transverse strengthening beam is disposed close to the first cross beam, the second transverse strengthening beam is disposed close to the second cross beam, the third transverse strengthening beam is disposed between the first transverse strengthening beam and the second transverse strengthening beam, and the longitudinal strengthening beam is disposed between the flow channel plate and the third transverse strengthening beam. Both ends of the longitudinal strengthening beam are respectively disposed between the first transverse strengthening beam and the flow channel plate and between the second transverse strengthening beam and the flow channel plate.

6. The liquid cooling plate according to claim 5, characterized in that, Both ends of the first, second, and third transverse strengthening beams are respectively fixed within the first step portion and the second step portion. The side of the first transverse strengthening beam away from the second transverse strengthening beam is placed within the third step portion, and the side of the second transverse strengthening beam away from the first transverse strengthening beam is placed within the fourth step portion.

7. The liquid cooling plate according to claim 4, characterized in that, It further includes a liquid inlet joint and a liquid outlet joint. The liquid inlet joint and the liquid outlet joint are arranged on the same side in the length direction of the cold plate body, and are both arranged on the lower surface of the flow channel plate. The liquid inlet joint and the liquid outlet joint are both fixed between the first cross beam and the first transverse reinforcing beam, and through holes for the liquid inlet joint and the liquid outlet joint to horizontally pass through are formed in the first cross beam.

8. The liquid cooling plate according to claim 7, characterized in that, The pipeline part includes a liquid inlet part and a liquid outlet part. The liquid inlet part and the liquid outlet part are located on the same side in the length direction of the flow channel plate. On the fitting part on the same side as the liquid inlet part, a first mounting hole for mounting the liquid inlet joint and a second mounting hole for mounting the liquid outlet joint are provided. The first mounting hole is arranged close to the liquid inlet part, and the second mounting hole is arranged close to the liquid outlet part.

9. The liquid cooling plate according to claim 8, wherein, On the bottom plate, a first convex part protruding upward is provided corresponding to the liquid inlet part. A first transition cavity is formed between the first convex part and the flow channel plate. The projections of the first mounting hole and the liquid inlet part on the bottom plate coincide with the first convex part, and the first mounting hole communicates with the liquid inlet part through the first transition cavity.

10. The liquid cooling plate according to claim 9, wherein, On the bottom plate, a second convex part protruding upward is provided corresponding to the liquid outlet part. A second transition cavity is formed between the second convex part and the flow channel plate. The projections of the second mounting hole and the liquid outlet part on the bottom plate coincide with the second convex part, and the second mounting hole communicates with the liquid outlet part through the second transition cavity.

11. A liquid cooling box, characterized in that, It includes the liquid cooling plate according to any one of claims 1 to 10 and a box cover covering the liquid cooling plate.

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