Liquid cooling plate and liquid cooling box

Abstract

The invention 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 arranged below the base plate and stacked with the base plate, and the base plate comprises a bottom plate, a side wall extending upwards along the circumferential direction of the bottom plate and a flange extending 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. The base plate adopts the downward concave structure, so that the overall structural strength is enhanced, the battery module is more stable and reliable to place, the cold plate main body, the box body and the frame main body are matched without gaps due to the arrangement of the flanges, 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 present invention 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 capacity of energy storage batteries, which are not bound by unified standards, has increased from the initial 280Ah and 314Ah to 500Ah+. To meet market demand, a high-strength steel contoured frame structure liquid cooling lower box came into being. The conventional liquid cooling box adopts the structural design of the upper box body and the liquid cooling lower box body. The liquid cooling lower box body is an important part of the liquid cooling system, which plays the role of cooling, supporting, bearing and protecting. The conventional liquid cooling lower box body adopts a flat liquid cooling plate with a bottom reinforcement plate structure design. The frame is located between the box and the liquid cooling plate. The frame joints are connected by welding, and a crossbeam is used to strengthen the frame horizontally. The cumbersome welding route, grinding and shaping process invisibly increase the cost of the box; and the frame needs to reserve a glue groove and a sealing strip position. A large amount of sealant and adhesive strips need to be applied when the board is assembled. Even if the airtightness of the liquid cooling box is guaranteed in the later stage, the glue overflows and the appearance is not good. The joint part uses a through-box joint or a brazed joint protruding from the frame. The former has complex machined structure, cumbersome assembly process, high cost and other problems, and the latter will increase the size of the cold plate, which invisibly increases 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 above-mentioned defects. Summary of the invention

[0004] The object of the present invention is to provide a liquid cooling plate and a liquid cooling box.

[0005] According to one aspect of the present invention, there is provided a liquid cooling plate, comprising:

[0006] A cold plate body, the cold plate body comprising a base plate and a flow channel plate disposed below the base plate and stacked with the base plate, the base plate comprising 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 together form a downwardly concave accommodating cavity, the flow channel plate comprising a pipeline portion formed by a downward concave portion and a fitting portion fitted with the lower surface of the bottom plate;

[0007] A frame body, the frame body includes a longitudinal beam assembly and a cross beam assembly, the flange 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 accommodating cavity is located in the frame body surrounded by the longitudinal beam assembly and the cross beam assembly, and the flow channel plate is located in 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 substrate in the width direction, and 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 flange and connected to the corresponding flange.

[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 opposite to each other, 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 opposite to each other, and both ends of the first cross beam and the second cross beam are provided with a slot portion that cooperates with the first step portion and the second step portion

[0010] Preferably, it also includes a reinforcing component arranged at the bottom of the flow channel plate, the reinforcing component is placed in the frame body, and includes a first transverse reinforcing beam, a second transverse reinforcing beam and a third transverse reinforcing beam extending along the width direction of the flow channel plate and a longitudinal reinforcing beam extending along the length direction of the flow channel plate, and the lowest surface contacted by the reinforcing component is higher than the bottom surface of the frame body.

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

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

[0013] Preferably, it also includes a liquid inlet joint and a liquid outlet joint, which are arranged on the same side of the length direction of the cold plate body and are both arranged on the lower surface of the flow channel plate, and the liquid inlet joint and the liquid outlet joint are both fixed between the first cross beam and the first transverse reinforcement beam, and the first cross beam is provided with a through hole for the liquid inlet joint and the liquid outlet joint to pass horizontally.

[0014] Preferably, the pipeline portion includes a liquid inlet portion and a liquid outlet portion, and the liquid inlet portion and the liquid outlet portion are located on the same side of the length direction of the flow channel plate. A first mounting hole for installing a liquid inlet joint and a second mounting hole for installing a liquid outlet joint are provided on the fitting portion located on the same side of the liquid inlet portion. The first mounting hole is arranged close to the liquid inlet portion, and the second mounting hole is arranged close to the liquid outlet portion.

[0015] Preferably, a first protruding portion protruding upward is provided on the bottom plate corresponding to the liquid inlet portion, a first transition cavity is formed between the first protruding portion and the flow channel plate, the projections of the first mounting hole and the liquid inlet portion on the bottom plate overlap with the first protruding portion, and the first mounting hole is connected to the liquid inlet portion through the first transition cavity.

[0016] Preferably, a second protruding portion protruding upward is provided on the bottom plate corresponding to the liquid outlet, a second transition cavity is formed between the second protruding portion and the flow channel plate, the projection of the second mounting hole and the liquid outlet on the bottom plate overlaps with the second protruding portion, and the second mounting hole is connected to the liquid outlet through the second transition cavity.

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

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

[0019] Due to the adoption of the above technical scheme, 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. The flange setting makes the cold plate body, the box body and the frame body fit together without 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 or use sealing strips to ensure the airtightness of the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0021] Figure 1 A three-dimensional diagram of the liquid cooling plate of the invention;

[0022] Figure 2 An exploded view of the invented liquid cooling plate;

[0023] Figure 3 A front view of the liquid cooling plate of the invention;

[0024] Figure 4 for Figure 3 A cross-sectional view at AA;

[0025] Figure 5 A three-dimensional diagram of the flow channel plate of the invention;

[0026] Figure 6 A back perspective view of the liquid cooling plate of the invention;

[0027] Figure 7 A perspective view of the frame body of the invention;

[0028] Figure 8 A perspective view of the invented longitudinal beam assembly;

[0029] Fig. 9 A perspective view of the invented crossbeam assembly;

[0030] Fig.10 It is a three-dimensional diagram of the liquid cooling box of the invention.

[0031] Description of the accompanying figures: 1. Cold plate body, 11. Base plate, 111. Bottom plate, 1111. First protrusion, 1112. Second protrusion, 1113. First transition cavity, 112. Side wall, 113. Flanging, 114. Accommodating 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 body, 21. Longitudinal beam assembly, 211. First longitudinal beam, 2111. First platform Step portion, 212. Second longitudinal beam, 2121. Second step portion, 22. Beam assembly, 221. First beam, 2211. Third step portion, 2212. Through hole, 222. Second beam, 2221. Fourth step portion, 223. Slot portion, 2231. Recess, 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 connector, 5. Liquid outlet connector, 6. Module beam, 7. Box cover. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the embodiments of the present invention 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 present invention. 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 present invention 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 document, 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 the present invention 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 present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. 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, including a cooling plate body 1, a frame body 2, a reinforcement assembly 3, a liquid inlet joint 4 and a liquid outlet joint 5. The cooling plate body 1 includes a substrate 11 and a flow channel plate 12 disposed below the substrate 11 and stacked with the substrate 11. The substrate 11 includes a bottom plate 111, a side wall 112 extending upward along the circumference of the bottom plate 111, and a flange 113 extending outward from the top of the side wall 112. The bottom plate 111, the side wall 112 and the flange 113 are integrally formed, and the side wall 112 and the bottom plate 111 together form a downwardly recessed accommodating cavity 114. Four module beams 6 are fixed in the accommodating 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 arranged at both ends of the bottom plate 111, and the other two module beams 6 are arranged 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 concave pipe portion 121 and a bonding portion 122 bonded to 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 is bonded to the base plate 11 to form a sealed cooling flow channel, so that the bottom of the cold plate body 1 has a cooling and heat dissipation effect on the battery module.

[0040] See also Figure 2 , Figure 3 , Figure 6 and Figure 7 The frame body 2 includes a longitudinal beam assembly 21 and a cross beam assembly 22 placed below the flange 113. The longitudinal beam assembly 21 is arranged along the length direction of the cold plate body 1, and the cross beam assembly 22 is arranged along the width direction of the cold plate body 1. The accommodating cavity 114 is located in the frame 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 arranged on both sides of the substrate 11 in the width direction, and the cross beam assembly 22 includes a first cross beam 221 and a second cross beam 222 respectively arranged on both sides of the substrate 11. The first longitudinal beam 211, the second longitudinal beam 212, the first cross beam 221 and the second cross beam 222 are respectively arranged at the bottom of the corresponding flange 113 and fixed to the corresponding flange 113. The first cross beam 221 is horizontally provided with a waist-shaped through hole 2212 extending up and down.

[0042] See also Figure 7 , Figure 8 and Fig. 9 The first longitudinal beam 211 and the second longitudinal beam 212 have the same structure. The first longitudinal beam 211 has a first step portion 2111 at the bottom, and the second longitudinal beam 212 has a second step portion 2121 at the bottom. The first step portion 2111 and the second step portion 2121 are arranged opposite to each other. The first crossbeam 221 has the same structure as the second crossbeam 222. The first crossbeam 221 has a third step portion 2211 at the bottom, and the second crossbeam 222 has a fourth step portion 2221 at the bottom. The third step portion 2211 and the fourth step portion 2221 are arranged opposite to each other. Both ends of the first crossbeam 221 and the second crossbeam 222 are provided with a slot portion 223 that matches the first step portion 2111 and the second step portion 2121. The slot portion 223 includes a notch 2231 for accommodating the first step portion 2111 or the second step portion 2121 and a flange 2232 for supporting the first step portion 2111 or the second step portion 2121. The first step portion 2111 , the second step portion 2121 , the third step portion 2211 and the fourth step portion 2221 together form a stepped inner space.

[0043] See also Figure 2 and Figure 6, the reinforcement component 3 is arranged at the bottom of the flow channel plate 12 and placed in the frame body 2. The reinforcement component 3 includes a first transverse reinforcement beam 31, a second transverse reinforcement beam 32 and a third transverse reinforcement beam 33 extending along the width direction of the flow channel plate 12, and a longitudinal reinforcement beam 34 extending along the length direction of the flow channel plate 12. The lowest surface contacted by the reinforcement component 3 is higher than the bottom surface of the frame body 2, that is, the reinforcement component 3 is completely placed in the stepped internal space and does not protrude from the plane where the bottom surface of the frame body 2 is located. The accommodating cavity 114 of the cold plate body 1 and the reinforcement component 3 are both located inside the frame body 2, and the frame body 2 protects both of them to prevent them from being damaged by collision, squeezing, etc. from the outside.

[0044] The first transverse reinforcing beam 31 is arranged near the first transverse beam 221, the second transverse reinforcing beam 32 is arranged near the second transverse beam 212, and the third transverse reinforcing beam 33 is arranged between the first transverse reinforcing beam 31 and the second transverse reinforcing beam 32. The longitudinal reinforcing beam 34 is arranged between the flow channel plate 12 and the third transverse reinforcing beam 33, and the two ends of the longitudinal reinforcing beam 34 are respectively arranged between the first transverse reinforcing beam 31 and the flow channel plate 12 and between the second transverse reinforcing beam 32 and the flow channel plate 12. In this embodiment, one longitudinal reinforcing beam 34 is provided and is located in the middle of the width direction of the third transverse reinforcing beam 33. In other embodiments, multiple longitudinal reinforcing beams 34 parallel to each other can be provided according to the strength requirements of the liquid cooling plate.

[0045] Two ends of the first, second and third transverse reinforcing beams 31 , 32 and 33 are respectively fixed in the first step portion 2111 and the second step portion 2121 , and a side of the second transverse reinforcing beam 32 away from the first transverse reinforcing beam 31 is placed in the fourth step portion 2221 .

[0046] See also 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 reinforcement beam 31. The liquid inlet joint 4 and the liquid outlet joint 5 extend outward through the waist-shaped through hole 2212 horizontally.

[0047] See also Figure 5 The pipeline part 121 includes a liquid inlet part 1211 and a liquid outlet part 1212, which are located on the same side of the length direction of the flow channel plate 12 and are located near the side where the first crossbeam 221 is located. The fitting part 122 located near the side where the first crossbeam 221 is located is provided with 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 also Figure 4 , a first protruding portion 1111 protruding upward is provided on the bottom plate 111 corresponding to the liquid inlet portion 1211, a first transition cavity 1113 is formed between the first protruding portion 1111 and the flow channel plate 12, the first mounting hole 1221 and the projection of the liquid inlet portion 1211 on the bottom plate 111 overlap with the first protruding portion 1111, and the first mounting hole 1221 is communicated with the liquid inlet portion 1211 through the first transition cavity 1113; a second protruding portion 1112 protruding upward is provided on the bottom plate 111 corresponding to the liquid outlet portion 1212, a second transition cavity is formed between the second protruding portion 1112 and the flow channel plate 12, the second mounting hole 1222 and the projection of the liquid outlet portion 1212 on the bottom plate 111 overlap with the second protruding portion 1112, and the second mounting hole 1222 is communicated with the liquid outlet portion 1212 through the second transition cavity. The liquid inlet connector 4 and the liquid outlet connector 5 are arranged below the flow channel plate 12 and brazed as one body, thus solving the problems of the complex machining structure and complicated assembly process of the through-box connector.

[0049] See also Fig.10 This embodiment also discloses a liquid cooling box, including the above-mentioned liquid cooling plate, and a box cover 7 arranged on the liquid cooling plate.

[0050] It will be apparent to those skilled in the art that various modifications and variations may 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 covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A liquid cooling plate, characterized in that: include: A cold plate body, the cold plate body comprising a base plate and a flow channel plate disposed below the base plate and stacked with the base plate, the base plate comprising 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 together form a downwardly concave accommodating cavity, the flow channel plate comprising a pipeline portion formed by a downward concave portion and a fitting portion fitted with the lower surface of the bottom plate; A frame body, the frame body includes a longitudinal beam assembly and a cross beam assembly, the flange 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 accommodating cavity is located in the frame body surrounded by the longitudinal beam assembly and the cross beam assembly, and the flow channel plate is located in the frame 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 arranged on both sides of the substrate in the width direction, and 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 flange and connected to the corresponding flange.

3. The liquid cooling plate according to claim 2, characterized in that: The first longitudinal beam has the same structure as the second longitudinal beam, 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, and the first step portion and the second step portion are arranged opposite to each other; the first cross beam has the same structure as the second cross beam, 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, and the third step portion and the fourth step portion are arranged opposite to each other; both ends of the first cross beam and the second cross beam are provided with a slot portion that cooperates with the first step portion and the second step portion.

4. The liquid cooling plate according to claim 3, characterized in that: It also includes a reinforcing component arranged at the bottom of the flow channel plate, which is placed in the frame body and includes a first transverse reinforcing beam, a second transverse reinforcing beam and a third transverse reinforcing beam extending along the width direction of the flow channel plate and a longitudinal reinforcing beam extending along the length direction of the flow channel plate, and the lowest surface contacted by the reinforcing component is higher than the bottom surface of the frame body.

5. The liquid cooling plate according to claim 4, characterized in that: The first transverse reinforcement beam is arranged close to the first transverse beam, the second transverse reinforcement beam is arranged close to the second transverse beam, the third transverse reinforcement beam is arranged between the first transverse reinforcement beam and the second transverse reinforcement beam, the longitudinal reinforcement beam is arranged between the flow channel plate and the third transverse reinforcement beam, and the two ends of the longitudinal reinforcement beam are respectively arranged between the first transverse reinforcement beam and the flow channel plate and between the second transverse reinforcement beam and the flow channel plate.

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

7. The liquid cooling plate according to claim 4, characterized in that: It also includes a liquid inlet joint and a liquid outlet joint, which are arranged on the same side of 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 reinforcement beam, and the first cross beam is provided with a through hole for the liquid inlet joint and the liquid outlet joint to pass horizontally.

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

9. The liquid cooling plate according to claim 8, characterized in that: A first protruding portion protruding upward is provided on the bottom plate corresponding to the liquid inlet portion, a first transition cavity is formed between the first protruding portion and the flow channel plate, the projections of the first mounting hole and the liquid inlet portion on the bottom plate overlap with the first protruding portion, and the first mounting hole is connected to the liquid inlet portion through the first transition cavity.

10. The liquid cooling plate according to claim 9, characterized in that: A second protrusion protruding upward is provided on the bottom plate corresponding to the liquid outlet, a second transition cavity is formed between the second protrusion and the flow channel plate, the projection of the second mounting hole and the liquid outlet on the bottom plate overlaps with the second protrusion, and the second mounting hole is connected with the liquid outlet through the second transition cavity.

11. A liquid cooling box, characterized in that: The invention comprises the liquid cooling plate according to any one of claims 1 to 10 and a box cover arranged on the liquid cooling plate.

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