Liquid cooling plate, battery module and battery pack

Abstract

The utility model relates to a liquid cooling plate, a battery module and a battery pack, a second plate in the liquid cooling plate is provided with a first plate surface and a second plate surface, the first plate surface and the second plate surface are respectively attached to the battery pack, a first channel is defined between the first plate surface and the second plate surface, and the first channel is filled with an elastic material; the elastic material divides the first channel into a plurality of first sub-channels; the elastic material is used for absorbing the expansive force of the battery pack and applying a counter-acting force to the battery pack, so that the battery pack is cooled, and meanwhile, when the battery pack expands, the expansive force of the battery can be absorbed through the elastic material in the second plate, so that the second plate can be effectively compressed and a counter-acting force is provided for the battery pack; the charging and discharging cycle performance of the battery pack is ensured, the expansive force absorption effect of the battery pack is good, and the cycle life of the battery pack is prolonged.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a liquid cooling plate, a battery module and a battery pack. Background Art

[0002] The liquid cooling plate is an important thermal management component in the battery module. The liquid cooling plate exchanges heat with the battery to adjust the battery temperature and ensure that the battery operates within a safe operating range. The battery will expand during the charging and discharging process, and the expansion of the battery can be absorbed by using buffers such as foam.

[0003] In the prior art, the liquid cooling plate and the buffer are usually separately and independently arranged in the battery module, which occupies a large space of the battery module and has a poor effect of absorbing the expansion force of the battery, thereby affecting the charge and discharge cycle performance of the battery and reducing the cycle life of the battery. Utility Model Content

[0004] Based on this, it is necessary to provide a liquid cooling plate, battery module and battery pack that can cool and dissipate heat for the battery and absorb the expansion force of the battery, occupy a small space in the battery module, have a good effect in absorbing the expansion force of the battery, and improve the cycle life of the battery in order to address the problems existing in the above-mentioned existing battery modules.

[0005] In a first aspect, the present application provides a liquid cooling plate, comprising:

[0006] The second plate member is provided with a first plate surface and a second plate surface, the first plate surface and the second plate surface are respectively arranged in contact with the battery pack, the first plate surface and the second plate surface are enclosed to form a first channel, and the first channel is filled with elastic material; the elastic material divides the first channel into a plurality of first sub-channels; the elastic material is used for absorbing the expansion force of the battery pack and applying a reaction force to the battery pack.

[0007] In one embodiment, the elastic material is provided with a plurality of first through grooves;

[0008] The first sub-channel is formed by connecting a plurality of first through grooves.

[0009] In one embodiment, the elastic material includes a plurality of spacers;

[0010] The first through groove is formed by enclosing at least one isolating member.

[0011] In one embodiment, the first through groove is circular or polygonal.

[0012] In one embodiment, the elastic material is a foamed aluminum member.

[0013] In one embodiment, the liquid cooling plate further includes a first plate member; the first plate member is used to support the battery pack, and the second plate member is disposed on the first plate member.

[0014] In one embodiment, the first plate is provided with a first through hole group and a second channel, and the second channel is connected to the first through hole group; the first through hole group is provided corresponding to the explosion-proof valve of the battery pack;

[0015] The battery pack includes a plurality of single cells, and explosion-proof valves are arranged on the bottom surfaces of the single cells; a plurality of first through holes are arranged in the first through hole group; and each first through hole is arranged in one-to-one correspondence with the explosion-proof valve of each single cell.

[0016] In one embodiment, a partition is provided in the second channel; the partition is used to divide the second channel into two second sub-channels, and the second sub-channels are respectively connected to a plurality of first through holes;

[0017] The second plate is correspondingly arranged on the partition.

[0018] In a second aspect, the present application provides a battery module, comprising a battery pack and a liquid cooling plate as described above;

[0019] The battery pack is set on a liquid cooling plate.

[0020] In a second aspect, the present application provides a battery pack, comprising the battery module as described above.

[0021] One of the above technical solutions has the following advantages and beneficial effects:

[0022] The above-mentioned liquid cooling plate includes a second plate member, which is provided with a first plate surface and a second plate surface. The first plate surface and the second plate surface are respectively arranged in contact with the battery pack. The first plate surface and the second plate surface enclose a first channel, and the first channel is filled with elastic material; the elastic material divides the first channel into a plurality of first sub-channels; the elastic material is used to absorb the expansion force of the battery pack and apply a reaction force to the battery pack, thereby realizing cooling and heat dissipation of the battery pack. At the same time, when the battery pack expands, the expansion force of the battery can be absorbed by the elastic material in the second plate member. The present application improves the design of the liquid cooling plate, which occupies a small space of the battery module. By arranging an elastic material in the first channel of the second plate, the first channel is divided into a plurality of first sub-channels that are interconnected. By inputting cooling liquid into the first channel, the cooling liquid is transmitted through each first sub-channel, and then the cooling liquid is conducted to the first plate surface and the second plate surface of the second plate. When the battery pack is attached to the first plate surface and the second plate surface of the second plate, the second plate can cool and dissipate heat for the battery pack. When the battery pack expands, the expansion force of the battery pack can be absorbed by the elastic material of the second plate, so that the second plate can be effectively compressed and provide a reaction force to the battery pack, thereby ensuring the charge and discharge cycle performance of the battery pack. The battery pack has a good expansion force absorption effect, thereby improving the cycle life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the liquid cooling plate from a first perspective in an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the liquid cooling plate in the embodiment of the present application from a first viewing angle;

[0025] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of the liquid cooling plate from a second perspective in an embodiment of the present application;

[0027] Figure 5 This is a schematic diagram of the cross-sectional structure of the liquid cooling plate in the embodiment of the present application from a second viewing angle;

[0028] Figure 6 This is a schematic diagram of the partial assembly structure of the liquid cooling plate in the embodiment of the present application;

[0029] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0030] Reference numerals:

[0031] 10. Liquid cooling plate; 100. First plate member; 110. First through hole group; 112. First through hole; 120. Second channel; 122. Partition; 124. Second sub-channel; 200. Second plate member; 210. First plate surface; 220. Second plate surface; 230. Elastic material; 232. First through groove; 234. Isolator; 300. First interface; 400. Second interface; 50. Battery pack; 510. Single cell. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover inclusions that are not listed. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0035] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0036] In addition, the term "plurality" shall mean two or more.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In one embodiment, Figure 1 , Figure 3 and Figure 6 As shown, a liquid cooling plate is provided, including a second plate member 200, the second plate member 200 is provided with a first plate surface 210 and a second plate surface 220, the first plate surface 210 and the second plate surface 220 are respectively arranged to fit the battery pack 50, and a first channel is formed between the first plate surface 210 and the second plate surface 220, and the first channel is filled with an elastic material 230; the elastic material 230 divides the first channel into a plurality of first sub-channels; the elastic material 230 is used to absorb the expansion force of the battery pack 50 and apply a reaction force to the battery pack 50.

[0039] The battery pack 50 may include a plurality of single cells 510, each of which may be connected in series and / or in parallel, and the single cells 510 may be lithium cells. The shape of the single cell 510 may be, but is not limited to, a square. For example, the single cell 510 is in the shape of a rectangular parallelepiped, and the single cell 510 includes a bottom surface, a top surface, and four side surfaces, and the four side surfaces may be divided into two large-area side surfaces and two small-area side surfaces. The top surface of the single cell 510 may be provided with an electrode column, and the bottom surface of the single cell 510 may be provided with an explosion-proof valve.

[0040] The second plate 200 may be in the shape of a flat plate. The second plate 200 may be a metal plate or a non-metal plate with good heat dissipation effect. For example, the second plate 200 may be an aluminum plate. The second plate 200 is provided with a first plate surface 210 and a second plate surface 220. The first plate surface 210 is opposite to the second plate surface 220. One side surface of each single cell 510 in the first supporting region is bonded to the first plate surface 210 of the second plate 200, and one side surface of each single cell 510 in the second supporting region is bonded to the second plate surface 220 of the second plate 200. Exemplarily, the large-area side surface of each single cell 510 in the first supporting region is bonded to the first plate surface 210 of the second plate 200, and the large-area side surface of each single cell 510 in the second supporting region is bonded to the second plate surface 220 of the second plate 200. In one example, the corresponding single cell 510 can be set on the first board surface 210 and the second board surface 220 of the second board surface 220 by bonding or the like. For example, the corresponding single cell 510 can be bonded and set on the first board surface 210 and the second board surface 220 of the second board surface 220 by using thermal conductive glue.

[0041] The first plate surface 210 and the second plate surface 220 of the second plate 200 are arranged at intervals, and the first plate surface 210 and the second plate surface 220 of the second plate 200 enclose a first channel, that is, the second plate 200 is a hollow structure. The first channel is filled with an elastic material 230; the elastic material 230 can be used to divide the first channel into a plurality of first sub-channels. For example, the elastic material 230 can be arranged in the first channel by welding, clamping or bonding; in another example, the elastic material 230 and the second plate 200 can be an integrally formed structure.

[0042] The elastic material 230 is filled in the first channel. When the coolant is input into the first channel of the second plate 200, the coolant can flow through each first sub-channel, that is, the coolant can directly contact the elastic material 230, the first plate surface 210 and the second plate surface 220, so as to conduct cooling to the elastic material 230, the first plate surface 210 and the second plate surface 220. In addition, based on the elastic material 230 contacting the first plate surface 210 and the second plate surface 220 respectively, the elastic material 230 can conduct cooling to the first plate surface 210 and the second plate surface 220 respectively, thereby improving the cooling efficiency of the first plate surface 210 and the second plate surface 220, so that the first plate surface 210 of the second plate 200 can cool and dissipate the corresponding single battery cells 510, and the second plate surface 220 of the second plate 200 can cool and dissipate the corresponding single battery cells 510, thereby improving the heat dissipation efficiency of each single battery cell 510 contained in the battery pack 50.

[0043] When any single cell 510 in the battery pack 50 expands, the corresponding position of the elastic material 230 can be effectively compressed to absorb the expansion force of the battery pack 50. At the same time, the corresponding position of the elastic material 230 can apply a reaction force to the expanded single cell 510, thereby improving the firmness of the battery pack 50 and thus improving the charge and discharge cycle performance of the battery pack 50.

[0044] In the above-mentioned embodiment, the second plate 200 is provided with a first plate surface 210 and a second plate surface 220, and the first plate surface 210 and the second plate surface 220 are respectively arranged in contact with the battery pack 50, and a first channel is formed between the first plate surface 210 and the second plate surface 220, and the first channel is filled with an elastic material 230; the elastic material 230 divides the first channel into a plurality of first sub-channels; the elastic material 230 is used to absorb the expansion force of the battery pack 50 and apply a reaction force to the battery pack 50, thereby realizing cooling and heat dissipation of the battery pack 50, and at the same time, when the battery pack 50 expands, the expansion force of the battery can be absorbed by the elastic material 230 in the second plate 200. The present application improves the design of the liquid cooling plate 10, occupies a small space of the battery module, and arranges an elastic material 230 in the first channel of the second plate 200 to divide the first channel into a plurality of first sub-channels interconnected with each other. By inputting cooling liquid into the first channel, the cooling liquid is transmitted through each first sub-channel, and then the cooling liquid is conducted to the first plate surface 210 and the second plate surface 220 of the second plate 200. When the battery pack 50 is attached to the first plate surface 210 and the second plate surface 220 of the second plate 200, the second plate 200 can cool and dissipate heat for the battery pack 50. When the battery pack 50 expands, the expansion force of the battery pack 50 can be absorbed by the elastic material 230 of the second plate 200, so that the second plate 200 can be effectively compressed and provide a reaction force to the battery pack 50, thereby ensuring the charge and discharge cycle performance of the battery pack 50. The expansion force absorption effect of the battery pack 50 is good, thereby improving the cycle life of the battery pack 50.

[0045] In one embodiment, Figure 2 and Figure 3 As shown, the elastic material 230 is provided with a plurality of first through grooves 232 ; the first sub-channel is formed by connecting the plurality of first through grooves 232 .

[0046] The elastic material 230 is provided with a plurality of first through slots 232 of the same size. For example, the elastic material 230 is also provided with a plurality of first through slots 232 of different sizes. Each first through slot 232 may be a through slot of the same shape or a channel of different shapes.

[0047] Each first through groove 232 included in the elastic material 230 can be divided into a plurality of groups of first through grooves 232, each group of first through grooves 232 includes a plurality of first through grooves 232, and a first sub-channel is formed by connecting a plurality of corresponding first through grooves 232. When the coolant is input into the first channel of the second plate 200, the coolant can flow through each first sub-channel, and the coolant is transmitted through each first through groove 232 in the corresponding first sub-channel, so as to realize cooling of the elastic material 230, the first plate surface 210 and the second plate surface 220, thereby increasing the contact area between the elastic material 230 and the coolant, and improving the cooling efficiency of the first plate surface 210 and the second plate surface 220, so that the first plate surface 210 of the second plate 200 can cool and dissipate the corresponding single cells 510, and the second plate surface 220 of the second plate 200 can cool and dissipate the corresponding single cells 510, thereby improving the heat dissipation efficiency of each single cell 510 included in the battery pack 50.

[0048] In one example, the first through groove 232 is provided with at least two openings, and each first through groove 232 is interconnected, so that the coolant can flow through each first through groove 232, so that the coolant can fully contact the elastic material 230 and the first plate surface 210 and the second plate surface 220 of the second plate 200, thereby further increasing the contact area between the coolant and the elastic material 230, and improving the cooling efficiency of the first plate surface 210 and the second plate surface 220.

[0049] In one embodiment, Figure 2 and Figure 3 As shown, the elastic material 230 includes a plurality of isolating members 234 ; the first through slot 232 is formed by being surrounded by at least one isolating member 234 .

[0050] The isolating members 234 may be isolating members 234 of the same shape and size. In another example, the isolating members 234 may be isolating members 234 of different shapes and sizes. The isolating members 234 may be formed into an elastic material 230 by integral molding. In another example, the isolating members 234 may be formed into an elastic material 230 by welding or bonding.

[0051] The first through groove 232 is formed by enclosing at least one isolation member 234, and the first sub-channel is formed by connecting a plurality of corresponding first through grooves 232. When the coolant is input into the first channel of the second plate 200, the coolant can flow through the corresponding first through groove 232 to conduct cooling to the elastic material 230, the first plate surface 210 and the second plate surface 220, so that the first plate surface 210 of the second plate 200 can cool and dissipate the corresponding single battery cells 510, and the second plate surface 220 of the second plate 200 can cool and dissipate the corresponding single battery cells 510, thereby improving the heat dissipation efficiency of the single battery cells 510 contained in the battery pack 50.

[0052] In one embodiment, the first through groove 232 is circular or polygonal. For example, the opening of the first through groove 232 may be hexagonal. In another example, the first through groove 232 may also be irregular. In order to facilitate the processing and molding of the elastic material 230, the first through grooves 232 included in the elastic material 230 may be through grooves of different shapes.

[0053] In one embodiment, the elastic material 230 is a foam aluminum part. The foam aluminum part has the characteristics of light weight, strong bending resistance and strong corrosion resistance. By using the foam aluminum part as the elastic material 230, the foam aluminum part has a number of holes connected to each other, so that the elastic material 230 forms a number of first through grooves 232, has good heat dissipation ability, and also has the ability to transport and supply coolant, so as to meet the transmission of coolant. In addition, the foam aluminum part is a good elastic compression buffer material with a good stress-strain curve. Therefore, when any single cell 510 in the battery pack 50 expands, the corresponding position of the elastic material 230 can be effectively compressed to absorb the expansion force of the battery pack 50. At the same time, the corresponding position of the elastic material 230 can apply a reaction force to the expanded single cell 510, realizing the dual effects of compression and rebound, improving the firmness of the battery pack 50, and thus improving the charge and discharge cycle performance of the battery pack 50.

[0054] It should be noted that by arranging elastic material 230 (foam aluminum part) in the first channel of the second plate 200, the strength of the second plate 200 can be enhanced, so that the second plate 200 can be used as a cross beam of the battery box, thereby simplifying the structure of the battery box and improving the space utilization of the battery box.

[0055] In one embodiment, Figure 1 , Figure 2 and Figure 5 As shown, the liquid cooling plate 10 further includes a first plate member 100 ; the first plate member 100 is used to support the battery pack 50 , and the second plate member 200 is disposed on the first plate member 100 .

[0056] The first plate 100 may be in the shape of a flat plate. The first plate 100 may be a metal plate or a non-metal plate with good support strength. For example, the first plate 100 may be a plate made of aluminum. The first plate 100 is used to support the battery pack 50. For example, the bottom surface of the corresponding single cell 510 may be fitted on the first plate 100. Exemplarily, the bottom surface of the single cell 510 may be set on the first plate 100 by bonding or clamping. In another example, the single cell 510 may be locked and fixed on the first plate 100 by fasteners.

[0057] The second plate 200 may be vertically disposed on the first plate 100, so that the liquid cooling plate 10 is T-shaped. Exemplarily, the second plate 200 may be disposed based on the central axis of the length direction of the first plate 100, and the support surface of the first plate 100 is divided into a first support area and a second support area, wherein the first support area may be used to support a plurality of single cells 510, and the second support area may be used to support a plurality of single cells 510.

[0058] In one embodiment, Figure 1 , Figure 4 and Figure 5 As shown, the first plate 100 is provided with a first through hole group 110 and a second channel 120 , and the second channel 120 is communicated with the first through hole group 110 ; the first through hole group 110 is provided corresponding to the explosion-proof valve of the battery pack 50 .

[0059] For example, the first plate 100 may be provided with a third plate surface and a fourth plate surface, the third plate surface is opposite to the fourth plate surface, the third plate surface is used to fit the battery pack 50 and support the battery pack 50; the fourth plate surface is used to fit the bottom surface of the battery box. The third plate surface and the fourth plate surface are arranged at intervals, so that the third plate surface and the fourth plate surface enclose a second channel 120. The second channel 120 may be a pressure relief channel, and the second channel 120 is connected to the first through hole group 110; the first through hole group 110 is arranged on the third plate surface of the first plate 100, and the explosion-proof valve of the battery pack 50 is arranged corresponding to the first through hole group 110. When the battery pack 50 has thermal runaway, the corresponding explosion-proof valve is opened, and then the single cell 510 in the battery pack 50 that has thermal runaway can discharge the generated high-temperature and high-pressure substances through the first through hole group 110 to the second channel 120, so as to achieve thermal runaway pressure relief of the battery pack 50 and improve the safety of the battery pack 50.

[0060] In one example, the second channel 120 can also be a liquid cooling channel. For example, coolant can be transmitted to the second channel 120, and then the bottom surface of the battery pack 50 is cooled and dissipated through the third plate surface of the first plate 100, thereby further improving the heat dissipation efficiency of the battery pack 50.

[0061] In one embodiment, Figure 4 , Figure 5 and Figure 7 As shown, the battery pack 50 includes a plurality of single cells 510 , and explosion-proof valves are arranged on the bottom surfaces of the single cells 510 ; the first through hole group 110 is provided with a plurality of first through holes 112 ; and each first through hole 112 is arranged in one-to-one correspondence with the explosion-proof valve of each single cell 510 .

[0062] For example, the single cell 510 may be in the shape of a rectangular parallelepiped, with an explosion-proof valve disposed on the bottom surface of the single cell 510, and an electrode column disposed on the top surface of the single cell 510, so as to achieve isolation between the electrode column of the single cell 510 and the second channel 120. By disposing the explosion-proof valve of the single cell 510 corresponding to the corresponding first through hole 112 of the first plate 100, each first through hole 112 is connected with the second channel 120, and then when any single cell 510 has thermal runaway, the explosion-proof valve of the single cell 510 having thermal runaway is opened, and the single cell 510 having thermal runaway can discharge the generated high-temperature and high-pressure substances through the corresponding first through hole 112 to the second channel 120, so as to achieve thermal runaway pressure relief of the single cell 510, thereby improving the safety of the single cell 510.

[0063] In one embodiment, Figure 1 and Figure 3 As shown, a partition 122 is disposed in the second channel 120 ; the partition 122 is used to divide the second channel 120 into two second sub-channels 124 , and the second sub-channels 124 are respectively connected to a plurality of first through holes 112 ; the second plate 200 is correspondingly disposed on the partition 122 .

[0064] The partition 122 may be disposed in the second channel 120 by welding or the like; in another example, the partition 122 and the first plate 100 may be an integrally formed structure.

[0065] Exemplarily, the partition 122 can be arranged along the central axis of the length direction of the second channel 120, dividing the second channel 120 into two second sub-channels 124; the second plate 200 can be arranged corresponding to the partition 122, thereby dividing the third plate surface of the first plate 100 into a first support area and a second support area, the first support area can be used to support a plurality of single cells 510, the second support area can be used to support a plurality of single cells 510, one second sub-channel 124 can be used to relieve pressure on each single cell 510 in the first support area, and another second sub-channel 124 can be used to relieve pressure on each single cell 510 in the second support area. By arranging the partition 122 in the second channel 120, the strength of the first plate 100 is strengthened, and stable support for the battery pack 50 is achieved.

[0066] In one embodiment, Figure 1 and Figure 4 As shown, the liquid cooling plate 10 further includes a first interface 300 and a second interface 400 ; the first interface 300 is connected to a first end of the first channel, and the second interface 400 is connected to a second end of the first channel.

[0067] The first interface 300 may be used to input the coolant, and the second interface 400 may be used to output the coolant.

[0068] The first interface 300 can be set at the first end of the first channel by means of screw connection, snap connection or bonding, and the first interface 300 is connected to the first end of the first channel; the second interface 400 can be set at the second end of the first channel by means of screw connection, snap connection or bonding, and the second interface 400 is connected to the second end of the first channel.

[0069] When the coolant is input into the first interface 300, the coolant is transmitted to the first channel of the second plate 200 through the first interface 300. After being transmitted through each first sub-channel, the coolant is discharged through the second interface 400, thereby realizing a liquid cooling circulation of the first channel. Thus, the first board surface 210 of the second plate 200 can cool and dissipate the corresponding single battery cells 510, and the second board surface 220 of the second plate 200 can cool and dissipate the corresponding single battery cells 510, thereby improving the heat dissipation efficiency of each single battery cell 510 contained in the battery pack 50.

[0070] It should be noted that the first interface 300 can be connected to the first end of the liquid cooling device through a first pipe, and the second interface 400 can be connected to the second end of the liquid cooling device through a second pipe. The liquid cooling device may include a liquid holding tank, a pump and a refrigeration module. The liquid holding tank, the pump, the refrigeration module and the first channel are connected to form a liquid cooling circulation loop.

[0071] In one embodiment, Figure 6 and Figure 7 As shown, a battery module is also provided, including a battery pack 50 and a liquid cooling plate 10 as described above; the battery pack 50 is arranged on the liquid cooling plate 10.

[0072] For the detailed description of the battery pack 50 and the liquid cooling plate 10 , reference may be made to the detailed description of the battery pack 50 and the liquid cooling plate 10 in the above embodiment, which will not be repeated here.

[0073] The second plate 200 is arranged on the first plate 100. By arranging the battery pack 50 on the first plate 100, the second plate 200 is provided with a first plate surface 210 and a second plate surface 220. The first plate surface 210 and the second plate surface 220 are respectively arranged in contact with the battery pack 50. A first channel is formed between the first plate surface 210 and the second plate surface 220. An elastic material 230 is arranged in the first channel. The elastic material 230 is used to divide the first channel into a plurality of first sub-channels, and the first sub-channels are interconnected. The elastic material 230 is also used to absorb the expansion force of the battery pack 50 and apply a reaction force to the battery pack 50, thereby realizing cooling and heat dissipation of the battery pack 50. At the same time, when the battery pack 50 expands, the expansion force of the battery can be absorbed by the elastic material 230 in the second plate 200.

[0074] In the above embodiment, the liquid cooling plate is improved and designed to occupy a small space of the battery module. By filling the first channel of the second plate with elastic material, the first channel is divided into a plurality of first sub-channels interconnected with each other. By inputting cooling liquid into the first channel, the cooling liquid is transmitted through each first sub-channel, and then the cooling liquid is conducted to the first plate surface and the second plate surface of the second plate. When the battery pack is attached to the first plate surface and the second plate surface of the second plate, the second plate can cool and dissipate the heat of the battery pack. When the battery pack expands, the elastic material of the second plate can absorb the expansion force of the battery pack, so that the second plate can be effectively compressed and provide a reaction force to the battery pack, thereby ensuring the charge and discharge cycle performance of the battery module. The battery module has a good expansion force absorption effect, thereby improving the cycle life of the battery module.

[0075] In one embodiment, a battery pack is also provided, comprising the battery module as described above.

[0076] For the specific description of the battery module, please refer to the specific description of the battery module in the above embodiment, which will not be repeated here.

[0077] Exemplarily, the battery pack may include a box, and the battery module is arranged in the box. By arranging the battery module in the box, the integration of the battery module is achieved. In the battery module, the first channel of the second plate is filled with elastic material to divide the first channel into a plurality of first sub-channels interconnected with each other. By inputting cooling liquid into the first channel, the cooling liquid is transmitted through each first sub-channel, and then the cooling liquid is conducted to the first plate surface and the second plate surface of the second plate. When the battery pack is attached to the first plate surface and the second plate surface of the second plate, the second plate can cool and dissipate the heat of the battery pack. When the battery pack expands, the elastic material of the second plate can absorb the expansion force of the battery pack, so that the second plate can be effectively compressed and provide a reaction force to the battery pack, thereby ensuring the charge and discharge cycle performance of the battery module. The expansion force absorption effect of the battery module is good, and the cycle life of the battery module is improved.

[0078] It should be noted that the battery pack may also include components such as a BMS, and a specific battery pack may include more components than those described in the above embodiments, or combine certain components, or have a different arrangement of components.

[0079] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A liquid cooling plate, characterized in that: include: A second plate member, the second plate member is provided with a first plate surface and a second plate surface, the first plate surface and the second plate surface are respectively arranged to be attached to the battery pack, the first plate surface and the second plate surface are enclosed to form a first channel, and the first channel is filled with an elastic material; The elastic material divides the first channel into a plurality of first sub-channels; the elastic material is used to absorb the expansion force of the battery pack and apply a reaction force to the battery pack.

2. The liquid cooling plate according to claim 1, characterized in that: The elastic material is provided with a plurality of first through grooves; The first sub-channel is formed by connecting a plurality of the first through grooves.

3. The liquid cooling plate according to claim 2, characterized in that: The elastic material includes a plurality of spacers; The first through groove is formed by enclosing at least one of the isolation members.

4. The liquid cooling plate according to claim 3, characterized in that: The first through groove is circular or polygonal.

5. The liquid cooling plate according to claim 1, characterized in that: The elastic material is a foamed aluminum piece.

6. The liquid cooling plate according to any one of claims 1 to 5, characterized in that: It also includes a first plate member; the first plate member is used to support the battery pack, and the second plate member is arranged on the first plate member.

7. The liquid cooling plate according to claim 6, characterized in that: The first plate is provided with a first through hole group and a second channel, the second channel is connected to the first through hole group; the first through hole group is provided corresponding to the explosion-proof valve of the battery pack; The battery pack includes a plurality of single cells, and explosion-proof valves are arranged on the bottom surfaces of the single cells; the first through hole group is provided with a plurality of first through holes; and each of the first through holes is arranged in one-to-one correspondence with the explosion-proof valve of each of the single cells.

8. The liquid cooling plate according to claim 7, characterized in that: A partition is provided in the second channel; the partition is used to divide the second channel into two second sub-channels, and the second sub-channels are respectively connected to a plurality of the first through holes; The second plate is correspondingly arranged on the partition.

9. A battery module, characterized in that: comprising a battery pack and a liquid cooling plate as claimed in any one of claims 1 to 8; The battery pack is arranged on the liquid cooling plate.

10. A battery pack, characterized in that: Comprising the battery module as claimed in claim 9.

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