Liquid cooling plate and battery box

Abstract

The utility model relates to a liquid cooling plate and a battery box, and relates to the technical field of batteries. The utility model provides a liquid cooling plate. The liquid cooling plate comprises a first plate body and a second plate body, the first plate body and the second plate body are connected and folded to form the liquid cooling plate, and the two opposite side faces of the liquid cooling plate are provided with a first heat exchange face and a second heat exchange face. The first heat exchange face and the second heat exchange face on the two opposite sides are used for conducting heat exchange on the battery cells located on the two sides of the liquid cooling plate at the same time, the battery cells arranged on the first heat exchange face conduct heat exchange with a cooling medium in a first flow channel, and the battery cells arranged on the second heat exchange face conduct heat exchange with a cooling medium in a second flow channel. The first flow channel and the second flow channel are two independent flow channels and do not interfere with each other; meanwhile, the first heat exchange surface and the second heat exchange surface of the liquid cooling plate are attached to the side wall of the battery cell, so that the temperature heat exchange effect on the side wall in the thickness direction of the battery cell can be better achieved, and the overall heat exchange effect of the liquid cooling plate and the battery cell is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a kind of liquid cooling plate and battery box. BACKGROUND

[0002] Current mainstream new energy battery pack thermal management scheme is to adopt liquid cooling plate into single-phase heat exchange medium or multi-phase heat exchange medium scheme, and for multi-phase material as heat exchange medium liquid cooling plate, liquid cooling plate is placed in the bottom of battery module.

[0003] The inventor found that, compared with the side of the battery cell, the heat exchange effect of the bottom of the battery cell is usually weakened due to the large thermal resistance in the Z direction (i.e. the thickness direction of the battery cell), which further reduces the heat exchange effect between the bottom of the battery cell and the liquid cooling plate.

[0004] At the same time, the side liquid cooling plate commonly used for single-phase heat exchange medium cannot meet the characteristics of multi-phase heat exchange medium at the inlet and outlet positions of the flow channel. It can be understood that, under high-temperature cooling conditions, the medium temperature at the inlet position is lower, and the temperature at the outlet position is higher. If the distance between the two positions is too far, the temperature difference will be large, which will affect the heat exchange effect. Under low-temperature heating conditions, the temperature is reversed. SUMMARY

[0005] The purpose of the utility model includes providing a liquid cooling plate and a battery box, which can better exchange heat in the thickness direction of the battery cell, thereby improving the overall heat exchange effect of the battery cell.

[0006] The embodiments of the utility model can be implemented as follows:

[0007] In a first aspect, the utility model provides a liquid cooling plate, comprising:

[0008] A first plate body is provided with a first flow channel;

[0009] A second plate body is provided with a second flow channel;

[0010] The first plate body and the second plate body are connected and folded to form a liquid cooling plate, and the opposite two sides of the liquid cooling plate have a first heat exchange surface and a second heat exchange surface. The first heat exchange surface is located on one side of the first plate body, and the second heat exchange surface is located on one side of the second plate body.

[0011] Optionally, a gap is provided between the first plate body and the second plate body, and a heat conducting member is provided in the gap;

[0012] Wherein, the gap is greater than or equal to 1mm, and the thickness of the heat conducting member is greater than or equal to 1mm.

[0013] Optionally, the first plate body has a first flow channel profile, and the first flow channel profile and the first heat exchange surface are located on the opposite two sides of the first plate body;

[0014] The second plate body has a second flow channel profile, and the second flow channel profile and the second heat exchange surface are located on opposite two sides of the second plate body.

[0015] The first flow channel profile and the second flow channel profile are oppositely arranged and form a gap, and the covering area of the heat conduction member is greater than the profile area of the first flow channel profile and the second flow channel profile.

[0016] Optionally, the liquid cooling plate comprises a first profile and a second profile, the first profile is stamped into a separate first flow channel profile and a second flow channel profile through a forming die, and the second profile forms the first heat exchange surface and the second heat exchange surface.

[0017] The first profile and the second profile are welded, folded towards the first profile along the middle line portion of the first profile and the second profile, and the liquid cooling plate is formed.

[0018] Optionally, the heat conduction member at least comprises heat conduction structural glue, and the heat conduction coefficient of the heat conduction structural glue is greater than or equal to 1 W / (m.K).

[0019] The heat conduction structural glue covers the gap.

[0020] Optionally, the region where the first flow channel is arranged and the region where the second flow channel is arranged are symmetrically arranged, and the flow direction of the first flow channel and the flow direction of the second flow channel are opposite.

[0021] Optionally, the first flow channel comprises a first inlet section, a plurality of first flow channel sections and a first outlet section which are sequentially connected, the first inlet section and the first outlet section are adjacently arranged, and the plurality of first flow channel sections are annular and the flow directions in adjacent first flow channel sections are opposite.

[0022] The second flow channel comprises a second inlet section, a plurality of second flow channel sections and a second outlet section which are sequentially connected, the second inlet section and the second outlet section are adjacently arranged, and the second flow channel sections are annular and the flow directions in adjacent second flow channel sections are opposite.

[0023] Optionally, the first inlet section and the first outlet section are located at the same end of the liquid cooling plate as the second inlet section and the second outlet section.

[0024] The first inlet section and the first outlet section are arranged in a staggered manner with the second inlet section and the second outlet section.

[0025] In a second aspect, the utility model provides a battery box, which comprises: an electric core.

[0026] The liquid cooling plate of any one of the above, the side wall of the plurality of electric cores is arranged in adhesion with the first heat exchange surface and / or the second heat exchange surface.

[0027] Optionally, the first flow channel has a first inlet and a first outlet, and the second flow channel has a second inlet and a second outlet, and the first inlet and the first outlet are located at the first end of the liquid cooling plate together with the second inlet and the second outlet;

[0028] A plurality of battery cells are arranged in the extension direction of the liquid cooling plate, and a spacing is provided between the first battery cell and the first end of the liquid cooling plate, and a spacing of at least 5 mm is provided between the last battery cell and the second end of the liquid cooling plate.

[0029] The liquid cooling plate and the battery box provided by the embodiments of the present application have the following beneficial effects:

[0030] The first heat exchange surface and the second heat exchange surface on the opposite sides simultaneously exchange heat with the battery cells located on the two sides of the liquid cooling plate, the battery cells arranged on the first heat exchange surface exchange heat with the cooling medium in the first flow channel, and the battery cells arranged on the second heat exchange surface exchange heat with the cooling medium in the second flow channel, and the first flow channel and the second flow channel are two separate flow channels that do not interfere with each other; at the same time, the first heat exchange surface and the second heat exchange surface of the liquid cooling plate are attached to the side walls of the battery cells, which can better exchange heat with the side walls in the thickness direction of the battery cells, thereby improving the overall heat exchange effect of the liquid cooling plate and the battery cells. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0032] Figure 1 A structural schematic view of the liquid cooling plate and the battery cell provided by the present embodiment is shown in the figure.

[0033] Figure 2 A Figure 1 A partial schematic view of A is shown in the figure.

[0034] Figure 3 A side view of the liquid cooling plate and the battery cell provided by the present embodiment is shown in the figure.

[0035] Figure 4 A structural schematic view of the liquid cooling plate provided by the present embodiment is shown in the figure.

[0036] Figure 5 A front view of the liquid cooling plate provided by the present embodiment is shown in the figure.

[0037] Figure 6 A first expanded view of the liquid cooling plate provided by the present embodiment is shown in the figure.

[0038] Figure 7 A second expanded view of the liquid cooling plate provided by the present embodiment is shown in the figure.

[0039] Figure 8 A third expanded view of the liquid cooling plate provided for the present embodiment.

[0040] Icon: 10-liquid cooling plate; 20-cell; 100-first plate body; 110-first flow channel; 111-first inlet section; 112-first flow channel section; 113-first outlet section; 114-first inlet joint; 115-first outlet joint; 120-first heat exchange surface; 130-first flow channel profile; 200-second plate body; 210-second flow channel; 211-second inlet section; 212-second flow channel section; 213-second outlet section; 214-second inlet joint; 215-second outlet joint; 220-second heat exchange surface; 230-second flow channel profile; 300-gap. DETAILED DESCRIPTION

[0041] The inventor found that, compared with the side surface of the cell, the heat exchange effect of the bottom of the cell is usually weakened due to the larger thermal resistance in the Z direction (i.e. the thickness direction of the cell), thereby weakening the heat exchange effect between the bottom of the cell and the liquid cooling plate.

[0042] To solve the above problems, the utility model provides a kind of liquid cooling plate 10 and battery box, it is pasted on the first heat exchange surface 120 and second heat exchange surface 220 of liquid cooling plate 10 both sides and set cell 20, liquid cooling plate 10 can better play the role of temperature heat exchange to the thickness direction of cell 20, thereby improving the heat exchange effect of cell 20 as a whole, so that the above problems can be improved.

[0043] To make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in conjunction with the drawings in the utility model embodiment. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. The components of the utility model embodiment described and shown in the drawings can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0045] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] In the description of the utility model, it is necessary to explain that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element indicated must have a specific orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model.

[0047] In addition, if the terms "first", "second" and the like are used only for differentiation, and cannot be understood as indicating or implying relative importance.

[0048] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0049] The overall structure, working principle and technical effects of the liquid cooling plate 10 and the battery box provided by the utility model are described in detail below through embodiments and in combination with the drawings.

[0050] Please refer to Figure 1 The liquid cooling plate 10 provided by the utility model is applied in a new energy battery box.

[0051] Please refer to Figure 1 And Figure 3 The battery box provided by the utility model comprises a plurality of battery cells 20 and a liquid cooling plate 10, and the side walls of the plurality of battery cells 20 are arranged in adhesion with the first heat exchange surface 120 and / or the second heat exchange surface 220.

[0052] Please refer to Figure 4 The liquid cooling plate 10 provided by the utility model comprises a first plate body 100 and a second plate body 200; the first plate body 100 is provided with a first flow channel 110; the second plate body 200 is provided with a second flow channel 210; the first plate body 100 and the second plate body 200 are connected and folded to form the liquid cooling plate 10, the liquid cooling plate 10 has a first heat exchange surface 120 and a second heat exchange surface 220 on the opposite two side surfaces, the first heat exchange surface 120 is located on one side surface of the first plate body 100, and the second heat exchange surface 220 is located on one side surface of the second plate body 200.

[0053] It is understood that by setting a liquid cooling plate 10 of a first plate 100 and a second plate 200, the first plate 100 and the second plate 200 are connected and folded to form a liquid cooling plate 10, so that the first heat exchange surface 120 and the second heat exchange surface 220 are located on opposite sides of the liquid cooling plate 10; by attaching a plurality of battery cells 20 to at least one side of the liquid cooling plate 10, the side of the battery cells 20 can exchange heat with the first heat exchange surface 120 and / or the second heat exchange surface 220, wherein the battery cells 20 set on the first heat exchange surface 120 exchange heat with the cooling medium in the first flow channel 110, and the battery cells 20 set on the second heat exchange surface 220 exchange heat with the cooling medium in the second flow channel 210.

[0054] The liquid cooling plate 10, configured in this way, can simultaneously exchange heat with the battery cells 20 located on both sides of the liquid cooling plate 10 through the first heat exchange surface 120 and the second heat exchange surface 220 on opposite sides. The battery cells 20 located on the first heat exchange surface 120 exchange heat with the cooling medium in the first flow channel 110, and the battery cells 20 located on the second heat exchange surface 220 exchange heat with the cooling medium in the second flow channel 210. The first flow channel 110 and the second flow channel 210 are two separate flow channels that do not interfere with each other. At the same time, the first heat exchange surface 120 and the second heat exchange surface 220 of the liquid cooling plate 10 are in close contact with the sidewall of the battery cell 20, which can better facilitate temperature heat exchange with the sidewall of the battery cell 20 in the thickness direction, thereby improving the overall heat exchange effect of the liquid cooling plate 10 and the battery cell 20.

[0055] Please refer to Figure 5 In this embodiment, a gap 300 is provided between the first plate 100 and the second plate 200, and a heat-conducting component is provided within the gap 300. The heat-conducting component is used to conduct heat to the hot and cold medium in the first flow channel 110 and the cooling medium in the second flow channel 210, so as to ensure the overall heat conduction and temperature uniformity of the liquid cooling plate 10, and reduce the temperature difference between the battery cell 20 provided on the first heat exchange surface 120 and the battery cell 20 provided on the second heat exchange surface 220.

[0056] Where the gap 300 ≥ 1mm, then the thickness of the heat-conducting component ≥ 1mm.

[0057] In this embodiment, please refer to Figure 4 The first plate 100 has a first flow channel profile 130 and a first heat exchange surface 120. The first flow channel profile 130 and the first heat exchange surface 120 are located on two opposite sides of the first plate 100. The first heat exchange surface 120 is a plane and the first flow channel profile 130 is a raised surface.

[0058] Please refer to Figure 3The second plate body 200 has a second flow channel profile 230 and a second heat exchange surface 220, the second flow channel profile 230 and the second heat exchange surface 220 are located on the opposite two sides of the second plate body 200, the second heat exchange surface 220 is a plane, and the second flow channel profile 230 is a convex surface.

[0059] The first flow channel profile 130 and the second flow channel profile 230 are oppositely arranged and form a gap 300, and the coverage area of the heat conduction member is greater than the contour area of the first flow channel profile 130 and the second flow channel profile 230. In this way, the heat exchange effect and temperature uniformity of the cold and hot medium in the first flow channel 110 and the cooling medium in the second flow channel 210 can be guaranteed.

[0060] Optionally, the heat conduction member at least includes a heat conduction structural adhesive, and the heat conduction coefficient of the heat conduction structural adhesive is greater than or equal to 1 W / (m.K). The heat conduction structural adhesive is applied to cover the gap 300 to form a heat conduction adhesive layer.

[0061] In the embodiment, the first body and the second body of the liquid cooling plate 10 are integrally formed, so that the liquid cooling plate 10 includes a first profile and a second profile, and the liquid cooling plate 10 is formed by the first profile and the second profile.

[0062] The first profile and the second profile are both plate structures. The first profile is stamped into a separate first flow channel profile 130 and a second flow channel profile 230 by a forming die, and the first flow channel profile 130 and the second flow channel profile 230 are respectively located on the two sides of the center line of the first profile. The second profile forms a first heat exchange surface 120 and a second heat exchange surface 220, and the first heat exchange surface 120 and the second heat exchange surface 220 are respectively located on the two sides of the center line of the second profile.

[0063] Specifically, the first profile and the second profile are welded, and are folded along the center line of the first profile and the second profile towards the first profile and form the liquid cooling plate 10. Through the liquid cooling plate 10 formed in this way, the first flow channel profile 130 and the second flow channel profile 230 are oppositely arranged and form a gap 300, and the second profile faces the outside and forms the first heat exchange surface 120 and the second heat exchange surface 220 which are planes.

[0064] It is worth mentioning that the side liquid cooling plate 10 commonly used for single heat exchange medium cannot meet the characteristics of multi-phase heat exchange medium at the flow channel inlet and outlet positions. It can be understood that in the high-temperature cooling working condition, the temperature of the medium at the inlet position is relatively low, and the temperature at the outlet position is relatively high. If the distance between the two positions is far, the temperature difference will be large, which will affect the heat exchange effect, and the temperature in the low-temperature heating working condition is opposite.

[0065] Therefore, in the embodiment, the region where the first flow channel 110 is arranged and the region where the second flow channel 210 is arranged are symmetrically arranged, and the flow direction of the first flow channel 110 and the flow direction of the second flow channel 210 are opposite.

[0066] It can be understood that the flow direction of the cooling medium in the first flow channel 110 is opposite to the flow direction of the cooling medium in the second flow channel 210, and the flow direction of the cooling medium is opposite to the heat transfer direction, which can maximize the utilization of temperature difference, improve heat exchange efficiency, and better ensure uniform temperature effect and reduce temperature difference.

[0067] In the embodiment, please refer to Figures 6-8 The first flow channel 110 includes a first inlet section 111, a plurality of first flow channel sections 112 and a first outlet section 113 connected in sequence, the first inlet section 111 and the first outlet section 113 are arranged adjacent to each other, and the plurality of first flow channel sections 112 are annular and the flow directions in adjacent first flow channel sections 112 are opposite.

[0068] The first flow channel 110 has a first inlet and a first outlet, the first inlet section 111 is provided with the first inlet, and the first outlet section 113 is provided with the first outlet.

[0069] In the embodiment, please refer to Figures 6-8 The second flow channel 210 includes a second inlet section 211, a plurality of second flow channel sections 212 and a second outlet section 213 connected in sequence, the second inlet section 211 and the second outlet section 213 are arranged adjacent to each other, and the plurality of second flow channel sections 212 are annular and the flow directions in adjacent second flow channel sections 212 are opposite.

[0070] The second flow channel 210 has a second inlet and a second outlet, the second inlet section 211 is provided with the second inlet, and the second outlet section 213 is provided with the second outlet.

[0071] The first inlet section 111 and the first outlet section 113 are located at the same end of the liquid cooling plate 10 as the second inlet section 211 and the second outlet section 213. It can also be understood that the first inlet and the first outlet are located at the same end of the liquid cooling plate 10 as the second inlet and the second outlet.

[0072] It can be understood that the flow directions of adjacent first flow channel sections 112 in the first flow channel 110 are opposite, so that the first flow channel section 112 of the forward flow channel is adjacent to the first flow channel section 112 of the reverse flow, which can better ensure the uniform temperature effect and reduce the temperature difference. The first flow channel 110 arranged in this way can reduce the temperature difference between the first inlet section 111 and the first outlet section 113 in high-temperature cooling working condition, and can also maintain a relatively uniform temperature distribution in low-temperature heating working condition. The second flow channel 210 is the same.

[0073] Optionally, the number of the first flow channel sections 112 and the second flow channel sections 212 is greater than 2.

[0074] In an embodiment, please refer to Figure 7, the first flow channel 110 is provided with two first flow channel segments 112, and the first flow channel 110 is a U-shaped flow channel; the second flow channel 210 is also provided with two second flow channel segments 212, and the second flow channel 210 is a U-shaped flow channel. Among them, the flow direction of the first flow channel 110 and the flow direction of the second flow channel 210 are opposite, the first inlet segment 111 and the first outlet segment 113 and the second inlet segment 211 and the second outlet segment 213 are located at the same end of the liquid cooling plate 10; then the first inlet segment 111 and the second outlet segment 213 are symmetrically arranged, the first outlet segment 113 and the second inlet segment 211 are symmetrically arranged, and the first flow channel segment 112 and the second flow channel segment 212 are symmetrically arranged.

[0075] In an embodiment, please refer to Figure 6 , the first flow channel 110 is provided with four first flow channel segments 112, and the first flow channel 110 is a U-shaped flow channel with a double-flow channel structure; the second flow channel 210 is also provided with four second flow channel segments 212, and the first flow channel 110 is a U-shaped flow channel with a double-flow channel structure. Among them, the flow direction of the first flow channel 110 and the flow direction of the second flow channel 210 are opposite, the first inlet segment 111 and the first outlet segment 113 and the second inlet segment 211 and the second outlet segment 213 are located at the same end of the liquid cooling plate 10; then the adjacent first inlet segment 111 and the first outlet segment 113 and the adjacent second inlet segment 211 and the second outlet segment 213 are arranged in a staggered manner, the adjacent first inlet segment 111 and the first outlet segment 113 are located at the bottom of the liquid cooling plate 10, and the adjacent second inlet segment 211 and the second outlet segment 213 are located at the top of the liquid cooling plate 10.

[0076] In an embodiment, please refer to Figure 8 , the first flow channel 110 is provided with at least four first flow channel segments 112, and the at least four first flow channel segments 112 are in a serpentine structure; the second flow channel 210 is provided with at least four first flow channel segments 112, and the at least four second flow channel segments 212 are in a serpentine structure. Among them, the flow direction of the first flow channel 110 and the flow direction of the second flow channel 210 are opposite, the first inlet segment 111 and the first outlet segment 113 and the second inlet segment 211 and the second outlet segment 213 are located at the same end of the liquid cooling plate 10; then the adjacent first inlet segment 111 and the first outlet segment 113 and the adjacent second inlet segment 211 and the second outlet segment 213 are arranged in a staggered manner, the adjacent first inlet segment 111 and the first outlet segment 113 are located at the bottom of the liquid cooling plate 10, and the adjacent second inlet segment 211 and the second outlet segment 213 are located at the top of the liquid cooling plate 10.

[0077] It is worth mentioning that the first flow channel 110 and the second flow channel 210 can be designed according to the actual heat exchange demand, which is not limited in the present application.

[0078] In the present embodiment, please refer to Figure 2The first inlet and the first outlet are located on the first heat exchange surface 120, and the second inlet and the second outlet are located on the second heat exchange surface 220.

[0079] In the present application, please refer to Figure 3 A plurality of battery cells 20 are arranged in the extension direction of the liquid cooling plate 10, and the distance between the first battery cell 20 and the last battery cell 20 is x; the first end of the liquid cooling plate 10 is spaced apart from the first battery cell 20 by a distance y, and it can be understood that the distance between the first inlet, the first outlet, the second inlet and the second outlet and the first battery cell 20 is y; the second end of the liquid cooling plate 10 is spaced apart from the last battery cell 20 by a distance l, wherein l is 5mm.

[0080] Therefore, it can be understood that the extension length of the liquid cooling plate 10 is x+y+l.

[0081] In summary, the liquid cooling plate 10 and the battery box provided by the embodiments of the present application can simultaneously exchange heat with the battery cells 20 located on both sides of the liquid cooling plate 10 through the first heat exchange surface 120 and the second heat exchange surface 220 on the opposite sides, the battery cells 20 arranged on the first heat exchange surface 120 exchange heat with the cooling medium in the first flow channel 110, and the battery cells 20 arranged on the second heat exchange surface 220 exchange heat with the cooling medium in the second flow channel 210, and the first flow channel 110 and the second flow channel 210 are two separate flow channels and do not interfere with each other; at the same time, the first heat exchange surface 120 and the second heat exchange surface 220 of the liquid cooling plate 10 are attached to the side walls of the battery cells 20, which can better exchange heat with the side walls of the battery cells 20 in the thickness direction of the battery cells 20, thereby improving the overall heat exchange effect of the liquid cooling plate 10 and the battery cells 20.

[0082] Further, the flow direction of the cooling medium in the first flow channel 110 is opposite to the flow direction of the cooling medium in the second flow channel 210, and the flow direction of the cooling medium is opposite to the heat transfer direction, which can maximize the use of temperature difference and improve the heat exchange efficiency, and at the same time, can better ensure the uniform temperature effect and reduce the temperature difference.

[0083] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A liquid-cooled plate, characterized in that, include: A first plate, on which a first flow channel is provided; The second plate has a second flow channel. The first plate and the second plate are connected and folded to form the liquid cooling plate. The liquid cooling plate has a first heat exchange surface and a second heat exchange surface on two opposite sides. The first heat exchange surface is located on one side of the first plate, and the second heat exchange surface is located on one side of the second plate.

2. The liquid cooling plate according to claim 1, characterized in that, A gap is provided between the first plate and the second plate, and a heat-conducting element is provided in the gap; Wherein, the gap is ≥1mm and the thickness of the heat-conducting component is ≥1mm.

3. The liquid cooling plate according to claim 2, characterized in that, The first plate has a first flow channel profile, and the first flow channel profile and the first heat exchange surface are located on two opposite sides of the first plate. The second plate has a second flow channel profile, and the second flow channel profile and the second heat exchange surface are located on two opposite sides of the second plate. The first flow channel surface and the second flow channel surface are arranged opposite each other to form the gap, and the coverage area of ​​the heat-conducting component is larger than the outline area of ​​the first flow channel surface and the second flow channel surface.

4. The liquid cooling plate according to claim 3, characterized in that, The liquid cooling plate includes a first profile and a second profile. The first profile is stamped into separate first and second flow channel surfaces by a forming mold, and the second profile forms the first heat exchange surface and the second heat exchange surface. The first profile and the second profile are welded together, and then folded in half along the center line of the first profile and the second profile toward the first profile to form the liquid cooling plate.

5. The liquid cooling plate according to claim 2, characterized in that, The thermally conductive component includes at least a thermally conductive structural adhesive, wherein the thermal conductivity of the thermally conductive structural adhesive is ≥1W / (mK); The thermally conductive structural adhesive is applied to cover the gap.

6. The liquid cooling plate according to claim 1, characterized in that, The regions where the first flow channel is set and the regions where the second flow channel is set are symmetrically arranged, and the flow direction of the first flow channel is opposite to that of the second flow channel.

7. The liquid cooling plate according to claim 6, characterized in that, The first flow channel includes a first inlet section, a plurality of first flow channel sections and a first outlet section connected in sequence. The first inlet section and the first outlet section are arranged adjacent to each other. The plurality of first flow channel sections are arranged in a ring shape and the flow directions within adjacent first flow channel sections are opposite. The second flow channel includes a second inlet section, a plurality of second flow channel sections and a second outlet section connected in sequence. The second inlet section and the second outlet section are arranged adjacent to each other. The second flow channel sections are in a circular shape and the flow directions within adjacent second flow channel sections are opposite.

8. The liquid cooling plate according to claim 7, characterized in that, The first inlet section and the first outlet section are located at the same end of the liquid cooling plate as the second inlet section and the second outlet section; The first inlet segment and the first outlet segment are offset from the second inlet segment and the second outlet segment.

9. A battery box, characterized in that, include: Battery cell; The liquid cooling plate according to any one of claims 1-8, wherein the sidewalls of the plurality of battery cells are disposed in contact with the first heat exchange surface and / or the second heat exchange surface.

10. The battery box according to claim 9, characterized in that, The first flow channel has a first inlet and a first outlet, and the second flow channel has a second inlet and a second outlet, wherein the first inlet and the first outlet are located at the first end of the liquid cooling plate. A plurality of battery cells are arranged in the extending direction of the liquid cooling plate, with a gap between the first battery cell and the first end of the liquid cooling plate, and the last battery cell being at least 5 mm away from the second end of the liquid cooling plate.

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