Liquid cooling plate and battery pack

Abstract

The utility model discloses a liquid cooling plate and a battery pack, and relates to the technical field of batteries, the liquid cooling plate is used for cooling a battery cell module, the battery cell module comprises a plurality of battery cells, a flow channel for a heat exchange medium to flow is arranged in the liquid cooling plate, the liquid cooling plate comprises a first surface, the first surface is used for exchanging heat with the battery cell module, and the second surface is used for cooling the battery cell module. A groove is formed in a partial area of the first face and used for being filled with heat-conducting glue. According to the liquid cooling plate and the battery pack, the temperature of each battery cell is relatively uniform, so that the service life of the battery pack is prolonged, and the heat management effect of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a liquid cooling plate and battery pack. BACKGROUND

[0002] With the improvement of lithium battery energy density, the heat power of the battery cell increases, and the liquid cooling battery pack is the mainstream scheme in the energy storage and power battery field. The heat of the heat generating battery cell in work is taken away by the low-temperature cooling liquid circulating in the liquid cooling plate, and the gap between the liquid cooling plate and the battery cell is filled with heat-conducting glue to reduce the thermal resistance and improve the heat conduction efficiency. However, some battery cells have a lower temperature, which affects the service life and thermal management effect of the battery pack. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the utility model provides a liquid cooling plate and battery pack, which can make the temperature of each battery cell relatively uniform, thereby improving the service life and thermal management effect of the battery pack.

[0004] The utility model further provides a liquid cooling plate for cooling a battery cell module, wherein the battery cell module comprises a plurality of battery cells, the liquid cooling plate has a flow channel for the flow of a heat exchange medium, the liquid cooling plate comprises a first surface, the first surface is used for heat exchange with the battery cell module, and part of the first surface forms a groove, and the groove is used for filling heat-conducting glue.

[0005] The liquid cooling plate according to the utility model has at least the following beneficial effects: by arranging the groove and arranging the heat-conducting glue in the groove, the thermal resistance of the corresponding area of the battery cell module is increased, the heat conduction efficiency is reduced, the temperature difference between the battery cells is reduced, the thermal management effect is further optimized, and the service life of the battery pack is improved.

[0006] According to some embodiments of the utility model, the number of grooves is multiple, and at least part of the grooves is distributed at opposite ends of the first surface.

[0007] According to some embodiments of the utility model, the depth of the grooves distributed at opposite ends of the first surface gradually decreases from one side close to the end portion to the opposite side.

[0008] According to some embodiments of the utility model, the flow channel comprises a first section with a liquid inlet, the number of grooves is multiple, and part of the grooves is arranged opposite to the first section along the thickness direction of the liquid cooling plate.

[0009] According to some embodiments of the utility model, the flow channel includes several branch sections, each branch section connection forms a confluence area, part of the grooves and at least part of the confluence area are oppositely arranged along the thickness direction of the liquid cooling plate.

[0010] According to some embodiments of the utility model, the projection of each battery cell along the thickness direction of the liquid cooling plate is at least partially outside the groove.

[0011] According to some embodiments of the utility model, the liquid cooling plate includes a flow channel plate and a sealing plate, the surface of the flow channel plate towards the sealing plate has a flow channel groove, and the sealing plate is arranged on one side of the flow channel plate with the flow channel groove to close the flow channel groove and form the flow channel.

[0012] According to some embodiments of the utility model, the flow channel plate is provided with a plurality of protruding reinforcing ribs, the reinforcing ribs are located in the flow channel groove, the height of the reinforcing ribs is lower than the depth of the flow channel groove, and both ends of each reinforcing rib are connected to the side wall of the flow channel groove.

[0013] According to some embodiments of the utility model, the flow channel plate is provided with a protruding flow disturbance protrusion, and the flow disturbance protrusion is located in the flow channel groove.

[0014] According to some embodiments of the utility model, the first surface is a surface of the flow channel plate away from the sealing plate, the flow channel plate is provided with protruding front and rear fixed beams, the front and rear fixed beams are distributed at opposite ends of the first surface, and are used for connecting with the battery cell module.

[0015] The flow channel plate is provided with a plurality of protruding reinforcing ribs and protruding flow disturbance protrusions, the reinforcing ribs, the flow disturbance protrusions, the front fixed beam and the rear fixed beam are integrally pressure cast with the flow channel plate.

[0016] According to the second aspect of the utility model, a battery pack is characterized in that the battery pack includes the liquid cooling plate, the shell, the battery cell module and the heat-conducting adhesive layer in the above embodiments.

[0017] The shell and the liquid cooling plate jointly enclose a containing cavity, the battery cell module and the heat-conducting adhesive layer are arranged in the containing cavity, the heat-conducting adhesive layer is located between the battery cell module and the liquid cooling plate, and part of the heat-conducting adhesive layer is in the groove.

[0018] Additional aspects and advantages of the utility model will be partially given in the following description, some will become apparent from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model makes further illustration below combining with the drawings and examples, among them,

[0020] Figure 1 It is the structure schematic drawing of battery pack of one embodiment of the utility model,

[0021] Figure 2 It is the sectional view of battery pack of one embodiment of the utility model,

[0022] Figure 3 It is the structure schematic drawing of the first surface of liquid cooling plate of one embodiment of the utility model,

[0023] Figure 4 It is the structure schematic drawing of another view of the first surface of liquid cooling plate of one embodiment of the utility model,

[0024] Figure 5 It is Figure 4 The local A enlarged schematic view of,

[0025] Figure 6 It is the structure schematic drawing of flow channel plate and seal plate of liquid cooling plate of one embodiment of the utility model,

[0026] Figure 7 It is the structure schematic drawing of the one side of flow channel plate of liquid cooling plate of one embodiment of the utility model towards seal plate.

[0027] Figure reference:

[0028] 10, liquid cooling plate, 10a, flow channel, 10b, first surface, 10c, recess, 10d, liquid inlet, 10e, liquid outlet, 11a, first section, 11b, branch section, 11c, confluence area, 100, flow channel plate, 100a, flow channel groove, 110, reinforcing rib, 120, turbulence protrusion, 130, front fixed beam, 140, rear fixed beam, 140a, weight reduction groove, 150, connecting nozzle, 200, seal plate,

[0029] 20, shell,

[0030] 30, electric core module, 301, electric core, 302, end plate,

[0031] 40, heat-conducting adhesive layer. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "include," "includes" and "including" in this application are meant to be non-limiting.

[0034] In the related art, since the battery pack includes the battery cell module, the battery cell module includes two metal end plates arranged at intervals, and a plurality of battery cells arranged at the interval positions. Since the metal end plates are in contact with the liquid cooling plate, the battery cells close to the metal end plates have a larger heat dissipation area, which causes the temperature of the battery cells close to the metal end plates to be slightly lower than that of other battery cells. In addition, the area near the liquid inlet and the area with a larger flow rate in the liquid cooling channel design also have a lower battery cell temperature.

[0035] To this end, the embodiments of the present application provide a liquid cooling plate for cooling the battery cell module 30. Please refer to Figure 1 and Figure 2 The battery cell module 30 includes a plurality of battery cells 301 and end plates 302, the plurality of battery cells 301 are arranged between the two end plates 302, and the two end plates 302 have a heat conduction function.

[0036] Please refer to Figures 3-7 The liquid cooling plate has a flow channel 10a for the heat exchange medium to flow. Optionally, the heat exchange medium can be water or other media with a heat conduction function, and the present application does not limit the specific type of heat exchange medium.

[0037] Please refer to Figures 3-5 The liquid cooling plate includes a first surface 10b. It can be understood that the first surface 10b is one surface of the liquid cooling plate 10 in the thickness direction. The first surface 10b is used for heat exchange with the battery cell module 30. That is, the heat of the battery cell module 30 can be transferred to the liquid cooling plate 10 through the first surface 10b.

[0038] Part of the first surface 10b forms at least one groove 10c, and the groove 10c is used to fill the heat-conducting glue. It can be understood that the heat-conducting glue is used to transfer the heat of the battery cell module 30 to the liquid cooling plate 10. By setting the groove 10c and setting the heat-conducting glue in the groove 10c, the thermal resistance of the area of the battery cell module 30 corresponding to the groove 10c is increased, and the heat transfer efficiency is reduced, thereby reducing the temperature difference between the battery cells 301, further optimizing the heat management effect, and improving the service life of the battery pack.

[0039] It can be understood that the number of grooves 10c can be multiple, and the multiple grooves 10c are selectively distributed at positions corresponding to the low-temperature battery cells 301 according to the temperature of the battery cells 301.

[0040] In some embodiments, at least some of the plurality of grooves 10c are distributed at opposite ends of the first face 10b.

[0041] It can be understood that, please refer to Figure 2 The battery cell module 30 includes two end plates 302, and a plurality of battery cells 301 are arranged between the two end plates 302. The end plates 302 are made of a heat-conducting material such as metal, and the end plates 302 are in contact with the liquid cooling plate 10 to transfer heat. The above arrangement enables the battery cells 301 close to the end plates 302 to transfer heat to the liquid cooling plate 10 through the end plates 302, and also relatively directly to the liquid cooling plate 10. The multiple heat transfer paths enable the temperature of the battery cells 301 to be relatively low.

[0042] By distributing part of the grooves 10c at opposite ends of the first face 10b and arranging heat-conducting glue in the grooves 10c, the thermal resistance between the battery cells 301 close to the end plates 302 and the liquid cooling plate 10 can be increased. Thus, the temperature difference between the battery cells 301 is reduced.

[0043] In some embodiments, the opposite ends of the first face 10b can each be provided with a plurality of grooves 10c. For example, a plurality of grooves 10c can be arranged along the length direction of the end plate 302. Specifically, the two end plates 302 are arranged at intervals along the length direction of the battery cell module 30. The length direction of the end plate 302 is the width direction of the battery cell module 30, and each end of the first face 10b can be provided with four grooves 10c at intervals along the length direction of the end plate 302.

[0044] Further, please refer to Figure 4 and Figure 5 In some embodiments, the depth of the grooves 10c distributed at opposite ends of the first face 10b gradually decreases from one side close to the end to the opposite side.

[0045] It can be understood that the closer the position of the battery cell 301 to the end plate 302, the lower the temperature of the battery cell 301. By gradually reducing the depth of the grooves 10c from one side close to the end to the opposite side, the closer the position of the battery cell 301 to the end plate 302, the deeper the depth of the groove 10c below, and the relatively thicker the thickness of the heat-conducting glue that can be filled, thereby balancing the temperature between the battery cells 301.

[0046] Please refer to Figure 7 The flow channel 10a includes a first section 11a having an inlet 10d. The heat exchange medium enters the first section 11a of the flow channel 10a from the inlet 10d and flows in the flow channel 10a.

[0047] In some embodiments, please refer to Figure 3The number of the grooves 10c is multiple, and at least one groove 10c is arranged opposite to the first section 11a along the thickness direction of the liquid cooling plate 10. It can be understood that the temperature of the heat exchange medium flowing from the liquid inlet 10d is relatively low, so that the heat exchange efficiency with the battery cell 301 opposite to the first section 11a along the thickness direction of the liquid cooling plate 10 is improved, and the temperature of the battery cell 301 opposite to the first section 11a along the thickness direction of the liquid cooling plate 10 is also relatively low. By arranging at least one groove 10c opposite to the first section 11a along the thickness direction of the liquid cooling plate 10, the heat exchange efficiency of the battery cell 301 can be reduced, and the temperature of the battery cell 301 can be balanced. In a specific embodiment, the groove 10c arranged opposite to the first section 11a along the thickness direction of the liquid cooling plate 10 is provided with multiple, which is located at one end of the liquid cooling plate 10. Figure 3

[0048] Further, the closer to the liquid inlet 10d, the less heat exchange medium absorbs the heat of the battery cell 301, and the lower the temperature. In some embodiments, the depth of the groove 10c arranged opposite to the first section 11a along the thickness direction of the liquid cooling plate 10 gradually decreases along the flow direction of the heat exchange medium, so as to further balance the temperature of the battery cell 301.

[0049] Please refer to Figure 7 The flow channel 10a can further include a plurality of branch sections 11b, and the plurality of branch sections 11b are in communication with the first section 11a.

[0050] It can be understood that if the flow channel 10a is a single flow channel 10a without shunt, the temperature of the heat exchange medium gradually increases along the flow direction of the heat exchange medium due to the gradual absorption of heat, and the heat exchange capacity gradually decreases, resulting in uneven temperature distribution of the battery cells 301 distributed along the flow direction of the heat exchange medium. In order to avoid the above situation, the flow channel 10a includes a plurality of branch sections 11b, and the heat exchange medium flowing from the liquid inlet 10d enters each branch section 11b. The temperature difference of the heat exchange medium in each branch section 11b is small, so that the temperature of each battery cell 301 can be further balanced by the branch section 11b.

[0051] Each branch section 11b is connected to form a confluence area 11c, and the heat exchange medium converges in the confluence area 11c and finally flows out from the liquid outlet 10e. The number of the confluence areas 11c can be multiple, and it can be understood that the flow in the confluence area 11c is relatively large, and the heat exchange efficiency is relatively high.

[0052] Please refer to Figures 3-5 ​In some embodiments, part of the plurality of grooves 10c is arranged opposite to at least part of the confluence area 11c along the thickness direction of the liquid cooling plate 10. It can be understood that the flow at the confluence area 11c is relatively large, and the heat exchange efficiency is relatively high. By arranging part of the plurality of grooves 10c opposite to at least part of the confluence area 11c along the thickness direction of the liquid cooling plate 10, the thermal resistance of the battery cell 301 arranged opposite to the confluence area 11c along the thickness direction of the liquid cooling plate 10 is increased, and the temperature balance between the battery cells 301 is further achieved.

[0053] The depth of the groove 10c is not limited, and in some embodiments, the depth of the groove 10c can be between 0mm-5mm.

[0054] The shape of the groove 10c is not limited, for example, the groove 10c can be rectangular.

[0055] It can be understood that the setting position, depth and area of the groove 10c can be designed as needed. Specifically, after obtaining the position and data of the temperature outlier battery cell 301 through CAE (Computer-Aided Engineering, computer-aided engineering) electrothermal simulation in the design stage, the area and depth of the groove 10c of the liquid cooling plate 10 are adjusted, the thermal resistance of the heat transfer path at the bottom of the battery cell 301 is changed, and the temperature difference level between the temperature outlier battery cell 301 and other battery cells 301 is reduced.

[0056] The formula for calculating the thermal resistance is: R=L / (kA); where L is the thickness of the heat-conducting material (m); k is the thermal conductivity of the heat-conducting material (W / m·K); A is the contact area of the heat-conducting material (m 2 ).

[0057] By changing the parameters of L and A of the heat-conducting adhesive between the battery cell 301 and the liquid cooling plate 10, the thermal resistance of the outlier battery cell 301 is compensated, the temperature difference between the battery cells 301 is narrowed, and the heat management effect is further optimized.

[0058] In order to avoid the battery cells 301 corresponding to each groove 10c in the battery cell module 30 from moving downward, thereby causing the output pole heights of the battery cells 301 to be inconsistent. In some embodiments, the projection of each battery cell 301 along the thickness direction of the liquid cooling plate 10 is at least partially outside the groove 10c. In this way, each battery cell 301 has at least a part outside the groove 10c, thereby being supported by the liquid cooling plate 10 to maintain the consistency of the output pole heights.

[0059] The specific structure of the liquid cooling plate 10 will be further described below.

[0060] In some embodiments, please refer to Figure 6The liquid cooling plate 10 comprises a flow channel plate 100 and a cover plate 200, both of which are plate structures and are stacked together. Please refer to Figure 7 The surface of the flow channel plate 100 facing the cover plate 200 has a flow channel groove 100a, that is, one side of the flow channel plate 100 away from the first surface 10b in the thickness direction has the flow channel groove 100a, and the cover plate 200 is arranged on the side of the flow channel plate 100 having the flow channel groove 100a to close the flow channel groove 100a and form the flow channel 10a. In this way, the flow channel 10a is formed by the cover plate 200 and the flow channel plate 100, which can facilitate the molding of the flow channel 10a.

[0061] The flow channel plate 100 and the cover plate 200 can be connected by friction stir welding to improve the reliability of the connection between the two.

[0062] It can be understood that, please refer to Figure 7 The flow channel groove 100a comprises a plurality of parallel sub-grooves, one sub-groove can be a part of one branch section 11b, or a plurality of parallel sub-grooves are connected to form a part of one branch section 11b. The side wall of each sub-groove makes the strength of the flow channel plate 100 along the extension direction of the sub-groove relatively high, but along the width direction of the sub-groove, that is, perpendicular to the extension direction of the sub-groove, the strength of the flow channel plate 100 is relatively low and is easy to deform and bend.

[0063] For this purpose, in some embodiments, please refer to Figure 7 The flow channel plate 100 is provided with a plurality of protruding reinforcing ribs 110, the reinforcing ribs 110 are located in the flow channel groove 100a, and the two ends of each reinforcing rib 110 are connected to the side wall of the flow channel groove 100a. Among them, the two ends of each reinforcing rib 110 are connected to the side wall of the flow channel groove 100a, that is, the extension direction of the reinforcing rib 110 intersects with the side wall of the flow channel groove 100a. In this way, each protruding reinforcing rib 110 can form a structural reinforcement body inclined to the extension direction of the side wall of the flow channel groove 100a together with the side wall of the flow channel groove 100a, thereby improving the strength of the flow channel plate 100 inclined to the extension direction of the flow channel groove 100a.

[0064] Among them, the height of the reinforcing rib 110 is lower than the depth of the flow channel groove 100a. In this way, the heat exchange medium can flow over the reinforcing rib 110.

[0065] In some embodiments, the reinforcing ribs 110 are arranged into seven groups, three of which are first reinforcing rib groups configured to be arranged along a direction perpendicular to the extending direction of the sub-channels, two of which are second reinforcing rib groups configured to be arranged along a direction inclined to the extending direction of the sub-channels and respectively located at intervals between two adjacent first reinforcing rib groups, and the remaining two are third reinforcing rib groups configured to be arranged along a direction inclined to the extending direction of the sub-channels and respectively located at intervals between two adjacent first reinforcing rib groups, wherein the third reinforcing rib groups intersect the second reinforcing rib groups.

[0066] The specific shape of the reinforcing ribs 110 is not limited, and in some embodiments, the reinforcing ribs 110 include an arc-shaped top surface to reduce the obstruction to the flow of the heat exchange medium.

[0067] In some embodiments, referring to Figure 7 , the flow channel plate 100 is provided with protruding turbulence protrusions 120 located in the flow channel groove 100a so that the turbulence protrusions 120 disturb the flow of the heat exchange medium in the flow channel 10a.

[0068] On the one hand, the arrangement of the turbulence protrusions 120 increases the contact area between the heat exchange medium and the flow channel plate 100, thereby improving the heat exchange between the heat exchange medium and the flow channel plate 100. On the other hand, the turbulence protrusions 120 disturb the flow of the heat exchange medium in the flow channel 10a, thereby enhancing the flowability of the heat exchange medium in the flow channel 10a, making the flow of the heat exchange medium more intense, especially the flow of the heat exchange medium along the depth direction of the flow channel 10a, thereby enhancing the temperature uniformity of the heat exchange medium itself. As can be seen, the addition of the turbulence protrusions 120 can not only improve the heat exchange effect of the water-cooled plate, but also have a temperature uniformity effect on the liquid-cooled plate 10.

[0069] In some embodiments, the number of turbulence protrusions 120 is not limited, and in some embodiments, the turbulence protrusions 120 are arranged in multiple groups and distributed in different regions of the flow channel groove 100a, such as the confluence region 11c and the bending region. Each group of turbulence protrusions 120 includes at least two rows of turbulence protrusions 120 arranged along the flow direction of the heat exchange medium, and the turbulence protrusions 120 of adjacent rows are arranged in a staggered manner along the flow direction of the heat exchange medium, thereby improving the turbulence effect.

[0070] In some embodiments, the height of the turbulence protrusions 120 can be equal to the height of the groove wall of the flow channel groove 100a, that is, the top surfaces of the two can be flush, so that the turbulence protrusions 120 can also contact the sealing plate 200.

[0071] For example, referring to Figure 3 and Figure 4The flow channel plate 100 is provided with protruding front fixing beams 130 and rear fixing beams 140, wherein the first surface 10b is a surface of the flow channel plate 100 facing away from the sealing plate 200, the front fixing beams 130 and the rear fixing beams 140 are distributed at opposite ends of the first surface 10b, and the front fixing beams 130 and the rear fixing beams 140 are used to be connected with the battery cell module 30. Specifically, the end plates 302 at the two ends of the battery cell module 30 are respectively connected to the front fixing beams 130 and the rear fixing beams 140, so as to realize the connection and fixing of the front fixing beams 130 and the rear fixing beams 140 with the battery cell module 30.

[0072] In some embodiments, referring to Figure 7 The flow channel plate 100 is provided with a plurality of protruding reinforcing ribs 110 and protruding turbulence protrusions 120, and the reinforcing ribs 110, the turbulence protrusions 120, the front fixing beams 130 and the rear fixing beams 140 are integrally pressure die cast with the flow channel plate 100. It can be understood that the pressure die casting can directly produce the relatively complex flow channel plate 100, and compared with the prior art in which the front fixing beams 130 and the rear fixing beams 140 are arranged by welding or riveting, the integrally pressure die casting can avoid introducing the welding and riveting processes, thereby improving the yield and reducing the manufacturing cost.

[0073] In order to reduce the weight of the flow channel plate 100 and save materials, a plurality of weight reduction grooves 140a can be formed on the front fixing beams 130 and the rear fixing beams 140.

[0074] The application also provides a battery pack, referring to Figure 1 and Figure 2 The battery pack comprises the liquid cooling plate 10, the shell 20, the battery cell module 30 and the heat-conducting adhesive layer 40.

[0075] The shell 20 and the liquid cooling plate 10 jointly enclose a containing cavity, the battery cell module 30 and the heat-conducting adhesive layer 40 are arranged in the containing cavity, the heat-conducting adhesive layer 40 is located between the battery cell module 30 and the liquid cooling plate 10, and part of the heat-conducting adhesive layer 40 is in the groove 10c.

[0076] The heat-conducting adhesive layer 40 is located between the battery cell module 30 and the liquid cooling plate 10, thereby providing a continuous heat conduction path, eliminating the air in the gap between the battery cell module 30 and the liquid cooling plate 10, reducing the thermal resistance and improving the heat transfer efficiency of the battery cells 301 to the liquid cooling plate 10. The cooling medium flows through the internal flow channel 10a of the liquid cooling plate 10, and the liquid cooling plate 10 made of aluminum has the characteristics of high thermal conductivity, thereby completing the heat exchange between the heat exchange medium and the battery cell module 30.

[0077] The forming process of the heat-conducting adhesive layer 40 is as follows: the battery cell module 30 is placed on the liquid cooling plate 10, then heat-conducting adhesive is filled between the battery cell module 30 and the liquid cooling plate 10, and part of the heat-conducting adhesive is filled in the groove 10c, thereby obtaining the heat-conducting adhesive layer 40.

[0078] In some embodiments, the first surface 10b comprises a first region and a second region, the first region is configured to arrange the battery cell module 30, the grooves 10c are distributed in the first region, the front fixed beam 130 and the rear fixed beam 140 are distributed at opposite ends of the first region, and each groove 10c is located between the front fixed beam 130 and the rear fixed beam 140. The shell 20 is arranged at the first region to protect the battery cell module 30.

[0079] The second region is provided with the liquid inlet 10d and the liquid outlet 10e, and the liquid inlet 10d and the liquid outlet 10e are communicated with the flow channel 10a. In this way, the liquid inlet 10d and the liquid outlet 10e are arranged outside the shell 20, so that the liquid inlet 10d and the liquid outlet 10e are connected with the external circulating equipment.

[0080] In the first surface 10b of the flow channel plate 100, two protruding connecting mouths 150 are arranged, and the liquid inlet 10d and the liquid outlet 10e are arranged on one connecting mouth 150, respectively.

[0081] It should be noted that if the present application involves directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0082] In this document, reference to“an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0083] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connecting”,“connecting”,“fixing” and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0084] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical term "contact" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact with each other without interaction force or contact between two objects in contact with each other with interaction force.

[0085] If the description in the embodiments of the present application involves "first", "second", etc., the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or", or "and / or" appears throughout the text, it means that the three parallel schemes include A scheme, or B scheme, or A and B schemes are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0086] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made on the basis of the inventive concept of the present application, and the contents of the present application specification and drawings, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A liquid cooling plate for cooling a battery cell module, the battery cell module comprising a plurality of battery cells, characterized in that, The liquid cooling plate has a flow channel for the flow of heat exchange medium. The liquid cooling plate includes a first surface for heat exchange with the battery cell module. A portion of the first surface forms a groove for filling with thermally conductive adhesive.

2. The liquid cooling plate according to claim 1, characterized in that, The number of grooves is multiple, and at least some of the grooves are distributed at opposite ends of the first surface.

3. The liquid cooling plate according to claim 2, characterized in that, The depth of the grooves distributed at opposite ends of the first surface gradually decreases from the side closer to the end to the opposite side.

4. The liquid cooling plate according to claim 1, characterized in that, The flow channel includes a first section with a liquid inlet; the number of grooves is plurality of, and some of the grooves are arranged opposite to the first section along the thickness direction of the liquid cooling plate; and / or... The flow channel includes several branch sections, and the connection of each branch section forms a confluence area. Among the multiple grooves, some of the grooves and at least some of the confluence areas are arranged opposite to each other along the thickness direction of the liquid cooling plate.

5. The liquid cooling plate according to claim 1, characterized in that, The projection of each of the battery cells along the thickness direction of the liquid cooling plate is at least partially outside the groove.

6. The liquid-cooled plate according to any one of claims 1-5, characterized in that, The liquid cooling plate includes a flow channel plate and a sealing plate. The surface of the flow channel plate facing the sealing plate has a flow channel groove. The sealing plate covers the side of the flow channel plate with the flow channel groove to close the flow channel groove and form the flow channel.

7. The liquid cooling plate according to claim 6, characterized in that, The flow channel plate is provided with a plurality of protruding reinforcing ribs, which are located in the flow channel groove. The two ends of each reinforcing rib are respectively connected to the side wall of the flow channel groove, and the height of the reinforcing rib is lower than the depth of the flow channel groove.

8. The liquid cooling plate according to claim 6, characterized in that, The flow channel plate is provided with protruding turbulence protrusions, which are located inside the flow channel groove.

9. The liquid cooling plate according to claim 6, characterized in that, The first side is the side of the flow channel plate that faces away from the sealing plate. The flow channel plate is provided with a protruding front fixing beam and a rear fixing beam. The front fixing beam and the rear fixing beam are distributed at opposite ends of the first side for connecting with the battery cell module. The flow channel plate is provided with multiple protruding reinforcing ribs and protruding turbulence protrusions. The reinforcing ribs, the turbulence protrusions, the front fixed beam, and the rear fixed beam are integrally die-cast with the flow channel plate.

10. A battery pack, characterized in that, The battery pack includes a liquid cooling plate, a housing, a cell module, and a thermally conductive adhesive layer as described in any one of claims 1-9; The housing and the liquid cooling plate together form a receiving cavity. The battery cell module and the thermally conductive adhesive layer are disposed in the receiving cavity. The thermally conductive adhesive layer is located between the battery cell module and the liquid cooling plate, and part of the thermally conductive adhesive layer is located in the groove.

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