Liquid cooling plate, battery pack and vehicle

Abstract

The utility model relates to a liquid cooling plate, a battery pack and a vehicle, and the liquid cooling plate comprises a runner plate and a uniform temperature plate; a flow channel groove and a first groove are formed in the surface of one side, facing the uniform temperature plate, of the flow channel plate, the uniform temperature plate and the flow channel plate are attached and fixed, the flow channel groove is blocked by the uniform temperature plate, a cooling flow channel is defined by the uniform temperature plate, a cooling area is formed by the cooling flow channel, and the first groove is located between the cooling area and the edge of the liquid cooling plate; a second groove is further formed in the surface of the side, away from the runner plate, of the temperature-uniforming plate, an arched part corresponding to the second groove is formed in the side, facing the runner plate, of the temperature-uniforming plate, the arched part is located in the first groove, or the temperature-uniforming plate is provided with a crumple hole, and the projection, on the surface of the temperature-uniforming plate, of the first groove covers the crumple hole. Through the first groove and the second groove or the crumple hole, the crumple part can be formed, and when collision occurs, the crumple part can provide guidance for deformation of the liquid cooling plate, so that the probability of thermal runaway of the battery cell caused by invasion of the liquid cooling plate into the battery cell due to deformation when the vehicle is collided is reduced, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery packs, in particular to a liquid cooling plate, a battery pack and a vehicle. BACKGROUND

[0002] The liquid cooling plate is arranged in the battery pack and is used for heat dissipation and cooling of the battery cells. The liquid cooling plate is internally provided with a cooling flow channel, and cooling liquid flows in the cooling flow channel.

[0003] The battery cell is adhesively fixed to the liquid cooling plate, the edge of the liquid cooling plate is fixed to the side beam in the battery pack, and a gap is left between the battery cell and the side beam. When the vehicle is impacted and the liquid cooling plate is subjected to a lateral impact force, the liquid cooling plate will be deformed at the position between the battery cell and the side beam. If the deformation direction is towards the side of the battery cell, the battery cell will be extruded and even intruded, thereby causing damage to the battery cell and even thermal runaway.

[0004] Therefore, how to reduce the probability of thermal runaway of the battery cell caused by the deformation of the liquid cooling plate into the battery cell when the vehicle is impacted and improve the safety is a technical problem that needs to be solved by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0005] The application aims to provide a liquid cooling plate, a battery pack and a vehicle, which can reduce the probability of thermal runaway of the battery cell caused by the deformation of the liquid cooling plate into the battery cell when the vehicle is impacted and improve the safety.

[0006] To solve the above technical problem, the application provides a liquid cooling plate, which comprises a flow channel plate and a uniform temperature plate. One side surface of the flow channel plate towards the uniform temperature plate is provided with a flow channel groove and a first recess. The uniform temperature plate and the flow channel plate are adhesively fixed. The uniform temperature plate blocks the flow channel groove and forms a cooling flow channel. The cooling flow channel forms a cooling area. The first recess is located between the cooling area and the edge of the liquid cooling plate. The other side surface of the uniform temperature plate away from the flow channel plate is further provided with a second recess. An arch part corresponding to the second recess is formed on the side of the uniform temperature plate towards the flow channel plate. The arch part is located in the first recess.

[0007] Optionally, the center lines of the first recess and the second recess are collinear in the projection of the surface of the uniform temperature plate.

[0008] Optionally, the spacing between the first recess and the edge of the liquid cooling plate is 10-20 mm.

[0009] Optionally, the projection of the first recess on the surface of the uniform temperature plate covers the second recess. The width of the first recess is 4-6 mm, and the width of the second recess is 3-5 mm.

[0010] And / or, the depth of the first groove is greater than the depth of the second groove, and the depth of the first groove is 2mm-4mm, and the depth of the second groove is 1mm-3mm.

[0011] The application also provides a liquid cooling plate, comprising a flow channel plate and a uniform temperature plate; the flow channel plate is provided with a flow channel groove and a first groove on one side surface facing the uniform temperature plate, the uniform temperature plate and the flow channel plate are fixedly attached, the uniform temperature plate blocks the flow channel groove and forms a cooling flow channel, the cooling flow channel forms a cooling area, and the first groove is located between the cooling area and the edge of the liquid cooling plate; the uniform temperature plate is further provided with a collapse hole, and the projection of the first groove on the surface of the uniform temperature plate covers the collapse hole.

[0012] Optionally, the center line of the first groove and the center line of the collapse hole are collinear in the projection of the surface of the uniform temperature plate.

[0013] Optionally, the number of the collapse holes is multiple, and each collapse hole is arranged along the length direction of the first groove.

[0014] And / or, along the width direction of the first groove, the spacing between the first groove and the edge of the liquid cooling plate is 10mm-20mm.

[0015] The application also provides a battery pack, comprising a battery cell and the liquid cooling plate as described above, and the end of the battery cell away from the pole is fixedly attached to the surface of the liquid cooling plate.

[0016] The application also provides a vehicle, comprising a vehicle body and the battery pack as described above, and the battery pack is fixedly arranged on the vehicle body.

[0017] Optionally, along the transverse direction of the vehicle body, the two sides of the flow channel plate are respectively provided with the first groove.

[0018] Compared with the prior art, the liquid cooling plate, the battery pack and the vehicle provided by the application have the following technical effects:

[0019] The flow channel plate is provided with the first groove, and the slot of the first groove is arranged on one side facing the uniform temperature plate. When the vehicle is in collision or the liquid cooling plate is subjected to lateral impact, the first groove deforms preferentially, specifically, the two side walls of the first groove approach each other, and the slot is squeezed to have a smaller opening degree, so that the flow channel plate is deformed away from the battery cell.

[0020] The uniform temperature plate is provided with a second groove or a collapse hole. When the uniform temperature plate is provided with the second groove, the groove opening of the second groove is arranged away from the flow channel plate. When the vehicle collides and the liquid cooling plate is subjected to lateral impact, deformation occurs preferentially at the second groove, specifically, the two side walls of the second groove are close to each other, the groove opening is extruded to be small in opening, and the uniform temperature plate can be deformed away from the battery cell. When the uniform temperature plate is provided with the collapse hole, the projection of the first groove on the surface of the uniform temperature plate can cover the collapse hole. At this time, the structural strength of the uniform temperature plate at the collapse hole is relatively weak. When the vehicle collides and the liquid cooling plate is subjected to lateral impact, the uniform temperature plate deforms preferentially at the collapse hole, and with the deformation of the first groove opening of the flow channel plate, the structure of the uniform temperature plate fixed on both sides of the first groove opening of the flow channel plate also deforms away from the battery cell during the deformation of the flow channel plate.

[0021] That is, through the first groove arranged on the flow channel plate and the second groove or the collapse hole arranged on the uniform temperature plate, a collapse part can be formed between the cooling area and the edge of the liquid cooling plate. In the mounted state, the collapse part is located between the battery cell and the side beam. When the vehicle collides, the deformation of the liquid cooling plate in the area between the battery cell and the side beam is guided, so that the deformation is directed away from the battery cell, avoiding the probability that the deformation of the liquid cooling plate invades the battery cell to cause damage to the battery cell or even thermal runaway, and improving the safety. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of a liquid cooling plate provided by an embodiment of the present application;

[0023] Figure 2 is Figure 1 an enlarged view of A in FIG. 1;

[0024] Figure 3 is Figure 1 a B-B sectional view in FIG. 1;

[0025] Figure 4 is Figure 1 a structural schematic diagram of a uniform temperature plate in FIG. 1;

[0026] Figure 5 is Figure 1 a sectional view of the liquid cooling plate and the battery cell in the mounted state in FIG. 1;

[0027] Figure 6 is Figure 5 an enlarged view of C in FIG. 1;

[0028] Figure 7 is a partial structural schematic diagram of a liquid cooling plate of another embodiment;

[0029] Figure 8 is Figure 7 a structural schematic diagram of a uniform temperature plate in FIG. 2;

[0030] Figure 9 is Figure 7 a sectional view of the liquid cooling plate and the battery cell in the installed state in

[0031] Figure 10 is Figure 9 an enlarged view of D in

[0032] attached Figures 1-10 In the drawings, the reference numerals are explained as follows:

[0033] 1 flow channel plate, 11 flow channel groove, 12 first groove;

[0034] 2 uniform temperature plate, 21 second groove, 22 collapse hole;

[0035] 3 cooling flow channel;

[0036] 4 collapse part

[0037] 5 cooling area;

[0038] 6 battery cell. DETAILED DESCRIPTION

[0039] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0040] The battery pack comprises a shell, a liquid cooling plate, a plurality of battery cells and a side beam, wherein the liquid cooling plate and each battery cell are located in the shell, specifically, the liquid cooling plate is fixedly arranged at the bottom of the shell, the liquid cooling plate comprises a cooling area, the cooling area is provided with a cooling flow channel and flows with cooling liquid, and the side end of each battery cell away from the pole is in contact with and fixed to the cooling area of the liquid cooling plate, which can be fixed by gluing, and the cooling liquid flowing in the liquid cooling plate can cool the battery cell.

[0041] The shell is also provided with a side beam in the circumferential direction, the side beam encloses to form a mounting cavity for mounting the battery pack, the cooling area of the liquid cooling plate is fixedly formed into an integral structure with each battery cell, the edge of the liquid cooling plate is welded and fixed to the side beam, and a gap is also left between the battery cell and the liquid cooling plate. When the vehicle is hit, the side beam is subjected to the impact force and deforms towards the side of the battery cell, in this process, the area of the liquid cooling plate between the battery cell and the side beam will be extruded and deformed, if the deformation of the liquid cooling plate is towards the side of the battery cell, it is easy to cause the liquid cooling plate to extrude and even pierce the battery cell after deformation, so that the battery cell is damaged or even thermal runaway occurs, and the safety is poor.

[0042] Therefore, the embodiment of the present application provides a liquid cooling plate, which can guide the deformation direction of the area of the liquid cooling plate between the battery cell and the side beam when the vehicle is hit, so that the liquid cooling plate deforms away from the battery cell, to solve the above technical problems. Specifically, as shown in Figures 1-3As shown, the liquid cooling plate includes two plate parts of a flow channel plate 1 and a uniform temperature plate 2, wherein the side surface of the flow channel plate 1 facing the uniform temperature plate 2 is provided with a flow channel groove 11 and a first recess 12, and after the uniform temperature plate 2 is fixed and attached to the flow channel plate 1, the uniform temperature plate 2 can block the flow channel groove 11 and form a cooling flow channel 3 between the two plate parts, and the cooling liquid flows in the cooling flow channel 3 to form the cooling area 5, and the first recess 12 is located in the area outside the cooling area 5, specifically between the cooling area 5 and the edge of the liquid cooling plate, which can be an elongated groove extending along the length direction of the edge of the liquid cooling plate, and in the installed state, the collapse flow channel 4 and the first recess 12 are located in the area of the liquid cooling plate between the battery cell 6 and the edge beam.

[0043] As shown in Figure 5 and Figure 6 , the first recess 12 is formed on the side surface of the flow channel plate 1 facing the uniform temperature plate 2 by stamping, and a protruding part corresponding to the first recess 12 is formed on the side surface away from the uniform temperature plate 2, and the slot of the first recess 12 is provided on the side facing the uniform temperature plate 2, so that when the vehicle collides and the liquid cooling plate is subjected to lateral impact, deformation occurs preferentially at the first recess 12, specifically the two side walls of the first recess 12 approach each other, and the slot is squeezed to reduce the opening degree, and in this process, energy can be absorbed by deformation to reduce the probability of thermal runaway due to battery cell 6 collision, thereby improving safety, and since the protruding part is provided on the side away from the uniform temperature plate 2, i.e. on the side away from the battery cell 6, when the flow channel plate 1 deforms at the first recess 12, the slot opening of the first recess 12 decreases and the protruding part deforms, which can guide the flow channel plate 1 to deform away from the battery cell 6, avoiding the situation that the flow channel plate 1 deforms towards the battery cell 6 and then hits the battery cell 6, causing damage to the battery cell 6 or even thermal runaway, thereby improving safety.

[0044] The uniform temperature plate 2 is also provided with a second recess 21 or a collapse hole 22 corresponding to the first recess 12, which can guide the deformation of the uniform temperature plate 2.

[0045] As shown in Figure 5 and Figure 6As shown, the second groove 21 is formed on the side surface of the uniform temperature plate 2 away from the flow channel plate 1 by stamping, and an arch part corresponding to the second groove 21 is formed on the side surface of the uniform temperature plate 2 facing the flow channel plate 1, the arch part is arranged in the first groove 12 and at least partially in the first groove 12, when the vehicle collides or the liquid cooling plate is subjected to lateral impact, the two side walls of the second groove 21 are close to each other, and the opening of the slot is squeezed to be small, in this process, the second groove 21 absorbs energy by deformation, reduces the probability of thermal runaway due to the collision of the battery cell 6, and further improves the safety, and since the arch part is arranged on the side facing the flow channel plate 1, that is, the side away from the battery cell 6, when the uniform temperature plate 2 deforms at the second groove 21, the opening of the second groove 21 is reduced, and the arch part deforms, which can guide the uniform temperature plate 2 to deform away from the battery cell 6, avoid the situation that the uniform temperature plate 2 deforms towards the side of the battery cell 6 and then impacts the battery cell 6, causing damage to the battery cell 6 or even thermal runaway, and improve the safety.

[0046] Through the arrangement of the first groove 12 and the second groove 21, the collapse part 4 between the cooling area 5 and the edge of the liquid cooling plate can be formed, and in the mounted state, the collapse part 4 is located between the battery cell 6 and the edge beam, which provides guidance to the deformation direction of the flow channel plate 1 and the uniform temperature plate 2 when the vehicle is impacted, so that the flow channel plate 1 and the uniform temperature plate 2 deform towards the side away from the battery cell 6, reducing the probability of thermal runaway caused by the invasion of the flow channel plate 1 and the uniform temperature plate 2 into the battery cell 6 after deformation, thereby protecting the battery cell 6 and improving the safety.

[0047] Along the width direction of the first groove 12, the center line of the first groove 12 and the center line of the second groove 21 are collinear on the projection of the surface of the uniform temperature plate 2. In this way, when lateral impact occurs, the deformation directions of the flow channel plate 1 and the uniform temperature plate 2 are the same, avoiding the situation that the deformation of the uniform temperature plate 2 is interfered by the slot wall of the first groove 12.

[0048] The arch part is located in the first groove 12, and the projection of the first groove 12 on the surface of the uniform temperature plate 2 can cover the second groove 21 to ensure smooth installation. Specifically, the width of the first groove 12 is 4-6 mm, and the width of the second groove 21 is 3-5 mm. The width of the first groove 12 and the second groove 21 can be 4 mm and 3 mm respectively, or 5 mm and 4 mm respectively, or 6 mm and 5 mm respectively. In this way, the arch part can be located in the first groove 12, and interference of the deformation of the arch part by the slot wall of the first groove 12 can also be avoided.

[0049] Of course, in the embodiment, the widths of the first groove 12 and the second groove 21 are not specifically limited, and can also be set to 3 mm and 2 mm, or 8 mm and 7 mm, respectively. However, if the widths of the first groove 12 and the second groove 21 are too large, the space will be limited, and the structural strength of the liquid cooling plate at the crush section 4 will be affected. If the widths of the first groove 12 and the second groove 21 are too small, the deformation guiding capability of the flow channel plate 1 and the uniform temperature plate 2 will be limited. Therefore, when the width of the first groove 12 is 4 mm to 6 mm, and the width of the second groove 21 is 3 mm to 5 mm, the structural strength of the liquid cooling plate at this position can be ensured, and the deformation guiding capability of the flow channel plate 1 and the uniform temperature plate 2 can be ensured, thereby ensuring the protection performance of the battery cell 6.

[0050] The depth of the first groove 12 is greater than the depth of the second groove 21, so that the arch section can be smoothly installed in the first groove 12. Specifically, the depth of the first groove 12 is 2 mm to 4 mm, and the depth of the second groove 21 is 1 mm to 3 mm. The depths of the first groove 12 and the second groove 21 can be 2 mm and 1 mm, or 3 mm and 2 mm, or 4 mm and 3 mm, respectively. In this way, the arch section can be ensured to be located in the first groove 12, and interference of the groove wall of the first groove 12 to the deformation of the arch section can also be avoided.

[0051] Of course, in the embodiment, the depths of the first groove 12 and the second groove 21 are not specifically limited, and can also be set to 1 mm and 0.5 mm, or 6 mm and 5 mm, respectively. However, if the depths of the first groove 12 and the second groove 21 are too large, the structural strength of the liquid cooling plate at the crush section 4 will be affected. If the depths of the first groove 12 and the second groove 21 are too small, the deformation guiding capability of the flow channel plate 1 and the uniform temperature plate 2 will be limited. Therefore, when the depth of the first groove 12 is 2 mm to 4 mm, and the depth of the second groove 21 is 1 mm to 3 mm, the structural strength of the liquid cooling plate at this position can be ensured, and the deformation guiding capability of the flow channel plate 1 and the uniform temperature plate 2 can be ensured, thereby ensuring the protection performance of the battery cell 6.

[0052] As shown in FIG. 6, the first groove 12 and the second groove 21 are arranged on the flow channel plate 1, and the arch section of the battery cell 6 is located in the first groove 12. Figure 7 and Figure 8As shown, the uniform temperature plate 2 is provided with a collapse hole 22, and the projection of the first groove 12 on the surface of the uniform temperature plate 2 can cover the collapse hole 22. Specifically, the uniform temperature plate 2 is provided with the collapse hole 22 by stamping, so that the structural strength of the uniform temperature plate 2 at this position is slightly weakened. When the vehicle collides and the liquid cooling plate is subjected to a lateral impact, the two side walls of the first groove 12 are close to each other, and the slot opening is squeezed to become smaller. In this process, the flow channel plate 1 deforms at the first groove 12, and the structural strength of the uniform temperature plate 2 at the collapse hole 21 is relatively weak, so that the uniform temperature plate 2 deforms at the collapse hole 21. The two ends of the slot opening of the first groove 12 are close to each other and deform towards the side away from the battery cell 6, and at the same time, the uniform temperature plate 2 is driven to move and deform away from the battery cell 6 through the fixing action between the flow channel plate 1 and the uniform temperature plate 2, thereby avoiding the deformation from invading the battery cell 6, and improving the safety.

[0053] Through the arrangement of the first groove 12 and the collapse hole 22, the collapse portion 4 between the cooling area 5 and the edge of the liquid cooling plate can be formed. In the installed state, the collapse portion 4 is located between the battery cell 6 and the side beam. When the vehicle collides, the deformation direction of the flow channel plate 1 and the uniform temperature plate 2 is guided, so that the flow channel plate 1 and the uniform temperature plate 2 deform away from the battery cell 6, thereby reducing the probability that the flow channel plate 1 and the uniform temperature plate 2 invade the battery cell 6 after deformation to cause thermal runaway, thereby protecting the battery cell 6 and improving the safety.

[0054] The number of collapse holes 22 is multiple, and each collapse hole 22 is arranged along the length direction of the first groove 12. Compared with the structure of arranging an entire collapse hole 22, the arrangement of multiple collapse holes 22 can ensure the structural strength of the uniform temperature plate 2.

[0055] Further, in the embodiment, the collapse hole 22 is a strip-shaped hole, and the length direction of the strip-shaped hole is parallel to the length direction of the first groove 12. Of course, the collapse hole 22 can also be arranged as a circular hole, and the collapse hole 22 arranged as a strip-shaped hole can reduce the number of collapse holes 22, thereby simplifying the processing technology and reducing the cost.

[0056] In the embodiment, the liquid cooling plate can be provided with the collapse portion 4 at each edge in the circumferential direction, or the liquid cooling plate can be provided with the collapse portion 4 at part of the edges. The vehicle further includes a vehicle body, and the battery pack is installed on the vehicle body. The liquid cooling plate is provided with the collapse portion 4 at both sides in the transverse direction of the vehicle body. In this way, the battery cell 6 in the battery pack can be protected and the safety can be improved when the vehicle collides laterally. At this time, the flow channel plate is provided with the first groove only at the two side edges, as shown in Figure 4 As shown, the uniform temperature plate 2 is provided with a second groove 21 at the two side edges, or as shown in Figure 8 The uniform temperature plate 2 is provided with a collapse hole 22 at the two side edges.

[0057] Along the length direction of the collapse portion 4, among the two end portions of the collapse portion 4, each end portion is arranged in alignment with or extends beyond the end portion corresponding to the cooling area 5, that is, the length of the collapse portion 4 is greater than or equal to the size of the cooling area 5 in the length direction of the collapse portion 4, and specifically, the two ends of the collapse portion 4 can be arranged in alignment with the two ends of the cooling area 5, or one end of the collapse portion 4 can be arranged in alignment with one end of the cooling area 5, and the other end of the collapse portion 4 can extend beyond the other end of the cooling area 5, or both ends of the collapse portion 4 can extend beyond both ends of the cooling area 5. In this way, the collapse portion 4 can provide protection for all points in the battery pack, further reducing the probability of impact of the battery cell 6 and improving safety.

[0058] Specifically, the specific length of the collapse portion 4 is not limited, and can be arranged according to the cooling area 5 formed by the cooling flow channel 3. For example, along the length direction of the collapse portion 4, the distance between the end portion of the collapse portion 4 and the end portion of the liquid cooling plate is not greater than 10% of the length of the liquid cooling plate. In this way, the collapse portion 4 can cover at least 80% of the middle portion of the liquid cooling plate, so as to ensure that each battery cell 6 in the battery pack can be protected.

[0059] Along the width direction of the collapse portion 4, the distance between the collapse portion 4 and the edge of the liquid cooling plate is preferably 10mm-20mm, and specifically can be 10mm, 15mm, 20mm, etc. Of course, the distance between the collapse portion 4 and the edge of the liquid cooling plate is not limited, and can also be set to 5mm, 30mm, etc. When the distance between the collapse portion 4 and the edge of the liquid cooling plate is set to 10mm-20mm, the space can be fully utilized to arrange the collapse portion 4, so as to ensure that the liquid cooling plate can provide stable guiding effect when the liquid cooling plate is subjected to lateral impact, and at the same time, enough space can be provided for the welding operation between the liquid cooling plate and the edge beam.

[0060] The uniform temperature plate 2 is arranged in alignment with the flow channel plate 1 around, and the material of the uniform temperature plate 2 and the flow channel plate 1 is not limited. In the embodiment, the uniform temperature plate 2 and the flow channel plate 1 are both made of aluminum material, which has low cost and good heat conduction effect, and the uniform temperature plate 2 and the flow channel plate 1 are attached and fixed by brazing.

[0061] Specifically, the uniform temperature plate 2 is preferably a 3-series aluminum plate, such as a 3003mod plate or a 3003mod-6061mod-3003mod plate, and the flow channel plate 1 is preferably an aluminum alloy brazing plate, such as a 3003mod-4045 plate or a 3003mod-6061mod-3003mod-4045 plate. In this way, the stamping formability, strength, durability and welding reliability of the uniform temperature plate 2 and the flow channel plate 1 are good.

[0062] In addition, the liquid cooling plate can be provided with a plurality of reinforcing flow channels. Specifically, reinforcing grooves can be arranged on the side surface of the flow channel plate 1 facing the uniform temperature plate 2. After the uniform temperature plate 2 is fixed with the flow channel plate 1, the reinforcing grooves can be blocked and enclosed to form reinforcing flow channels. The arrangement of the reinforcing flow channels can ensure the structural strength of the liquid cooling plate at this position. The reinforcing flow channels are arranged outside the cooling area 5 and located in a region with relatively large space of the liquid cooling plate, and the collapse portion 4 is arranged at a position close to the edge of the liquid cooling plate.

[0063] The reinforcing flow channels are different from the above-mentioned collapse portion 4 in structure. The structure of the reinforcing flow channels on the side of the uniform temperature plate 2 is not required to be a planar structure, while the side wall portion of the collapse portion 4 on the side of the uniform temperature plate 2 is further provided with an arching portion or a collapse hole 22, which can provide a guiding effect on the deformation of the uniform temperature plate 2 at this position.

[0064] In the description of the present application, it should be understood that the terms "length", "width", "left", "right", "circumferential direction" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0065] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0066] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A liquid-cooled plate, characterized in that, The liquid cooling plate comprises a flow channel plate and a uniform temperature plate. The flow channel plate is provided with a flow channel groove and a first groove on one side surface thereof facing the uniform temperature plate, the uniform temperature plate and the flow channel plate are fixedly attached, the uniform temperature plate blocks the flow channel groove and forms a cooling flow channel, the cooling flow channel forms a cooling area, and the first groove is located between the cooling area and the edge of the liquid cooling plate. The uniform temperature plate is further provided with a second groove on the side surface thereof away from the flow channel plate, and an arching portion corresponding to the second groove is formed on the side of the uniform temperature plate facing the flow channel plate, and the arching portion is located in the first groove.

2. The liquid cold plate of claim 1, wherein, The center lines of the first groove and the second groove are collinear in the projection of the surface of the uniform temperature plate.

3. The liquid cold plate of claim 1, wherein, The spacing between the first groove and the edge of the liquid cooling plate is 10-20 mm.

4. The liquid cold plate of any of claims 1-3, wherein, The projection of the first groove on the surface of the uniform temperature plate covers the second groove, the width of the first groove is 4-6 mm, and the width of the second groove is 3-5 mm. The depth of the first groove is greater than that of the second groove, and the depth of the first groove is 2-4 mm and the depth of the second groove is 1-3 mm.

5. A liquid cold plate, comprising: The liquid cooling plate comprises a flow channel plate and a uniform temperature plate. The flow channel plate is provided with a flow channel groove and a first groove on one side surface thereof facing the uniform temperature plate, the uniform temperature plate and the flow channel plate are fixedly attached, the uniform temperature plate blocks the flow channel groove and forms a cooling flow channel, the cooling flow channel forms a cooling area, and the first groove is located between the cooling area and the edge of the liquid cooling plate. The uniform temperature plate is further provided with a collapse hole, and the projection of the first groove on the surface of the uniform temperature plate covers the collapse hole.

6. The liquid cold plate of claim 5, wherein, The center lines of the first groove and the collapse hole are collinear in the projection of the surface of the uniform temperature plate.

7. The liquid cold plate of claim 5 or 6, wherein, The number of the collapse holes is multiple, and each collapse hole is arranged along the length direction of the first groove. The spacing between the first groove and the edge of the liquid cooling plate is 10-20 mm along the width direction of the first groove.

8. A battery pack, characterized by, The battery pack comprises a vehicle body and the liquid cooling plate according to claim 8, and the liquid cooling plate is fixedly arranged on the vehicle body.

9. A vehicle characterized by comprising: The battery pack comprises a vehicle body and the liquid cooling plate according to claim 8, and the liquid cooling plate is fixedly arranged on the vehicle body.

10. The vehicle of claim 9, wherein, The two sides of the flow channel plate are respectively provided with a first groove along the transverse direction of the vehicle body.

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