Liquid cooling plate

Abstract

The utility model discloses a liquid cooling plate, which comprises a plate body, a cavity forming a liquid cooling flow channel is arranged in the plate body, an assembling structure is arranged on the inner wall of the plate body, the assembling structure comprises two first positioning convex ribs, the two first positioning convex ribs are arranged along the length direction of the liquid cooling flow channel, and the two first positioning convex ribs are arranged on the inner wall on the same side. An elastic piece is assembled between the two first positioning convex ribs, abuts against the inner wall where the first positioning convex ribs are located and the opposite inner wall and is located between the two first positioning convex ribs, deformation of the liquid cooling flow channel is prevented, and the liquid cooling flow channel cannot be damaged even if a small amount of deformation is generated. The elastic piece can also release the elastic potential energy of the elastic piece to promote the liquid cooling flow channel to restore to the original shape. More importantly, the elastic piece is assembled between the two first positioning convex ribs in an inserting mode, maintenance can be carried out by independently replacing the elastic piece, the whole liquid cooling plate does not need to be replaced, and therefore the maintenance cost of the liquid cooling plate in the aspect can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a liquid cooling plate. Background Art

[0002] With the popularization of electric vehicles (EVs), the demand for fast charging technology is increasing day by day. However, the thermal management of the battery pack during fast charging has become a major challenge. High-current charging not only generates a large amount of heat but also is accompanied by the phenomenon of thermal expansion of the battery. The temperature of the battery rises during the charging process, resulting in its volume expansion. This expansion behavior will cause physical pressure on the structures around the battery, especially the liquid cooling plate.

[0003] To solve the problem of heat generation of the battery pack, liquid cooling technology is widely used in the battery thermal management system (BTMS). The liquid cooling plate, as a key component of the liquid cooling system, is usually designed with internal hollow channels for the circulation of the coolant to effectively reduce the temperature of the battery. However, when the battery expands due to temperature rise during charging, the battery module will squeeze the adjacent liquid cooling plate, and the liquid cooling plate itself has a certain height and is extremely prone to large-amplitude deformation under external pressure, thus affecting the heat dissipation effect of the liquid cooling plate on the battery. Summary of the Utility Model

[0004] In order to overcome at least one of the above-mentioned defects of the prior art, the utility model provides a liquid cooling plate, which can solve the problem of large-amplitude deformation of the liquid cooling plate caused by the expansion of the battery cell.

[0005] The technical solution adopted by the utility model to solve its problems is as follows:

[0006] A liquid cooling plate for dissipating heat from the battery cell includes a plate body. A cavity forming a liquid cooling channel is provided in the plate body. An elastic member is assembled in the liquid cooling channel. One side of the elastic member is attached to the inner wall of one side of the liquid cooling channel, and the elastic member protrudes toward the side away from the inner wall attached to the elastic member.

[0007] By adopting the above scheme, one side of the elastic member is attached to the inner wall of the liquid cooling channel, and the other side protrudes toward the side away from the inner wall attached to the elastic member. It can absorb and relieve the extrusion caused by the thermal expansion of the battery cell when the liquid cooling channel is compressed due to the expansion of the battery cell, prevent the liquid cooling channel from generating plastic deformation, and even if a small amount of deformation occurs, the elastic member can release its own elastic potential energy to prompt the liquid cooling channel to return to its original state. In addition, by reducing the damage of the liquid cooling plate caused by the expansion of the battery cell, the reliability of the entire liquid cooling system is improved, and the service life of the liquid cooling plate and its related components is extended.

[0008] Further, the elastic member abuts against the two opposite inner walls of the liquid cooling channel respectively, dividing the liquid cooling channel into two independent cavities.

[0009] By adopting the above solution, the elastic member abuts against the two inner walls opposite to the liquid cooling channel, which can not only improve the supporting effect on the cavity of the plate body further, but also divide the liquid cooling channel into two independent cavities, facilitating the series / parallel setting of the liquid cooling channels in the entire liquid cooling system.

[0010] Furthermore, an assembly structure is provided on the inner wall of the plate body. The assembly structure includes two first positioning ribs. The two first positioning ribs are arranged along the length direction of the liquid cooling channel, and the two first positioning ribs are provided on the same side of the inner wall. An elastic member is assembled between the two first positioning ribs, and the elastic member abuts against the inner wall where the first positioning ribs are located and the opposite inner wall respectively.

[0011] By adopting the above solution, the two first positioning ribs are arranged on the inner wall on the same side along the direction of the liquid cooling channel, providing a fixed point for the elastic member. The elastic member is located between the two first positioning ribs. More importantly, the elastic member is assembled between the two first positioning ribs in a plug-in manner. After the liquid cooling plate is used for a long time, even if the elastic performance of the elastic member deteriorates, the elastic member can be replaced separately for repair without replacing the entire liquid cooling plate. Therefore, the maintenance cost of the liquid cooling plate in this aspect can be reduced.

[0012] Furthermore, the inner wall of the plate body has a first large surface and a second large surface which are oppositely arranged, and the two first positioning ribs are both provided on the first large surface or the second large surface.

[0013] By adopting the above solution, during the force application process, since the first large surface and the second large surface with larger areas are more likely to deform compared to other surfaces, it is more necessary to provide targeted support by the elastic member. By arranging the first positioning ribs on the first large surface or the second large surface, when the elastic member is installed, it can abut between the first large surface and the second large surface, thereby effectively supporting the first large surface and the second large surface, reducing the degree of deformation of the liquid cooling channel, and thus ensuring the flow effect of the liquid cooling channel.

[0014] Furthermore, it is set that the vertical distance between the first large surface and the second large surface is B, the thickness of the battery cell adjacent to the plate body is T, and the maximum height of the first positioning rib is H, then H = B - T * 3%.

[0015] By adopting the above solution, by defining the maximum height H of the first positioning rib, it can be ensured that when the battery cell expands, the liquid cooling plate can provide precise support, and it will not happen that when the elastic member has not reached its maximum absorption performance due to the relatively high height of the first positioning rib, the first positioning rib abuts against the inner wall opposite to it in advance, thus affecting the absorption performance of the elastic member. Moreover, there will be stress concentration caused by the first positioning rib abutting against the inner wall opposite to it in advance, and even the plate body may be damaged.

[0016] Further, the assembly structure further includes a second positioning rib. Among the first positioning rib and the second positioning rib, one is disposed on the first major surface, and the other is disposed on the second major surface. The second positioning rib and the two first positioning ribs are staggeredly distributed. A clamping groove is provided on the side of the elastic member facing the second positioning rib, and the second positioning rib is clamped with the clamping groove.

[0017] By adopting the above solution, by staggeredly distributing the first positioning rib and the second positioning rib on the first major surface and the second major surface, it is ensured that the elastic member can maintain a preset stress state during installation, preventing the elastic member from undergoing plastic deformation due to external forces. In addition, a clamping groove is designed on the side of the elastic member facing the second positioning rib, which forms a clamping connection with the second positioning rib. It not only can play a certain guiding role in the installation of the elastic member, but more importantly, it can ensure that the elastic member can accurately return to its position when bearing the thermal expansion pressure of the battery cell, thereby improving the reliability and service life of the entire liquid cooling system.

[0018] Further, the distances between the second positioning rib and the two first positioning ribs are the same.

[0019] By adopting the above solution, the uniform distribution of the elastic members in the liquid cooling plate is ensured, so that when the entire plate body is subjected to the expansion pressure of the battery cell, the stress distribution of each part is more uniform, reducing local stress concentration and avoiding deformation or damage caused by uneven local stress. In addition, the same distance makes the replacement and maintenance of the elastic members more standardized, without the need to design multiple specifications of elastic members for different distances, reducing the maintenance cost and complexity.

[0020] Further, multiple groups of the above assembly structures are provided along the height direction of the inner wall of the plate body.

[0021] By adopting the above scheme, the setting of multiple groups of assembly structures enables the liquid cooling plate to disperse pressure through the coordinated action of each positioning rib and elastic member when subjected to the expansion pressure of the battery cell, preventing the deformation of the liquid cooling channel, thereby maintaining the stability and cooling effect of the liquid cooling system. Moreover, the distribution of multiple groups of assembly structures can effectively reduce the damage to the liquid cooling plate caused by the expansion of the battery cell, extend the service life of the liquid cooling plate and related components, and reduce the maintenance and replacement costs. In addition, the design of multiple groups of assembly structures has high flexibility, and the number and position of the assembly structures can be adjusted according to the specific size and layout of the battery pack to meet the thermal management requirements of different vehicle models and battery configurations.

[0022] Further, in two adjacent groups of the assembly structures, the first positioning rib of one group of the assembly structures is arranged on the first large surface, and the first positioning rib of the other group of the assembly structures is arranged on the second large surface.

[0023] By adopting the above scheme, the staggered arrangement ensures that when the liquid cooling plate bears the expansion pressure of the battery cell, the force can be evenly distributed on different surfaces of the plate body, avoiding deformation or damage caused by excessive pressure on one side, and improving the overall stability and durability of the structure. And the alternately arranged first positioning ribs can increase the lateral rigidity of the plate body, reduce the deformation of the liquid cooling plate caused by the expansion of the battery cell, maintain the integrity of the liquid cooling channel and the smooth flow of the coolant, thereby improving the cooling efficiency.

[0024] Further, the elastic member is a rubber strip or an elastic sheet.

[0025] By adopting the above scheme, the selection of the rubber strip or the elastic sheet provides diverse materials and shapes for the elastic member, and the most suitable material can be selected according to the design of different liquid cooling plates and the specific application environment to meet specific thermal management and mechanical strength requirements.

[0026] Further, at least one side of the bottom of the plate body is provided with a pressure relief plate, the pressure relief plate has a pressure relief channel and an exhaust port, the pressure relief channel is arranged in the pressure relief plate, and the exhaust port is arranged at the top of the pressure relief plate to communicate the top of the pressure relief plate with the outside.

[0027] By adopting the above scheme, the pressure relief channel and the exhaust port on the pressure relief plate can timely release the internal pressure of the battery cell, prevent the internal pressure of the battery pack from being too high, and ensure the safe operation of the battery. When the temperature of the battery cell rises, the hot air in the battery pack can be discharged through the exhaust port of the pressure relief plate, avoiding the continuous rise of the internal temperature of the battery pack caused by the accumulation of hot air, thereby reducing the risk of thermal runaway.

[0028] Further, the pressure relief plates are respectively arranged on both sides of the bottom of the plate body.

[0029] By adopting the above solution, the double-sided pressure relief plate design enables the liquid cooling plate to better adapt to the sizes and layouts of different battery packs, enhancing the adaptability and versatility of the system.

[0030] Furthermore, a plurality of exhaust ports are provided, and the plurality of exhaust ports are arranged along the length direction of the pressure relief channel.

[0031] By adopting the above solution, the plurality of exhaust ports can release the pressure generated inside the battery pack due to battery expansion more quickly and evenly, prevent excessive local pressure, contribute to maintaining the pressure balance inside and outside the battery pack, and reduce the physical impact on the liquid cooling plate. Moreover, the increase in the exhaust ports helps to timely discharge the hot air generated inside the battery pack during charging, reduce the temperature of the battery pack, thereby optimizing the battery thermal management and avoiding the decline in battery performance or safety problems caused by overheating.

[0032] In summary, a liquid cooling plate provided by the present utility model has the following technical effects:

[0033] 1. One side of the elastic member is attached to the inner wall of the liquid cooling flow channel, and the other side protrudes away from the inner wall attached to the elastic member. When the liquid cooling flow channel is compressed due to the expansion of the battery cell, it can absorb and relieve the extrusion effect caused by the thermal expansion of the battery cell, prevent the liquid cooling flow channel from undergoing plastic deformation, and even if a small amount of deformation occurs, the elastic member can release its own elastic potential energy to cause the liquid cooling flow channel to return to its original state.

[0034] 2. By reducing the damage to the liquid cooling plate caused by the expansion of the battery cell, the reliability of the entire liquid cooling system is improved, and the service life of the liquid cooling plate and its related components is extended.

[0035] 3. By reducing the damage caused by the expansion of the battery cell, the service life of the liquid cooling plate is extended, indirectly reducing the long-term operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0037] Figure 2 is a sectional structural schematic diagram of the elastic member of the present utility model in the state of adopting a rubber strip;

[0038] Figure 3 is Figure 2 an enlarged view of part A of

[0039] Figure 4 is a structural schematic diagram of the rubber strip of the present utility model;

[0040] Figure 5 is a sectional structural schematic diagram of the elastic member of the present utility model in the state of adopting an elastic sheet;

[0041] Figure 6 isFigure 5 Enlarged view of part B;

[0042] Figure 7 Schematic diagram of the elastic sheet structure of the present utility model.

[0043] Among them, the meanings of the reference numerals are as follows: 1, plate body; 11, liquid cooling flow channel; 12, first large surface; 13, second large surface; 2, assembly structure; 21, first positioning rib; 22, second positioning rib; 3, elastic member; 31, rubber strip; 32, elastic sheet; 33, clamping groove; 4, pressure relief plate; 41, pressure relief channel; 42, exhaust port; 5, battery cell. Specific embodiments

[0044] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described and discussed below with reference to the drawings of the present utility model. Obviously, only a part of the examples described here are not all the examples. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0045] For the convenience of understanding the embodiments of the present utility model, the following will further explain with specific examples with reference to the drawings, and each embodiment does not constitute a limitation to the embodiments of the present utility model.

[0046] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0048] Refer to Figures 1-4 , the present utility model discloses a liquid cooling plate for dissipating heat of a battery cell, including a plate body 1. A cavity forming a liquid cooling flow channel 11 is provided in the plate body 1. An elastic member 3 is assembled in the liquid cooling flow channel 11. One side of the elastic member 3 is attached to the inner wall of one side of the liquid cooling flow channel 11, and the elastic member 3 protrudes toward the side away from the inner wall to which the elastic member 3 is attached.

[0049] Specifically, the plate body 1 is a hollow plate, and the hollow structure of the plate body 1 constitutes a liquid cooling flow channel 11. An elastic member 3 is provided in the hollow structure of the plate body 1. One side of the elastic member 3 is attached to the inner wall of one side of the liquid cooling flow channel 11, that is, one side surface of the elastic member 3 is attached to the inner wall of one side of the liquid cooling flow channel 11, and the elastic member 3 protrudes toward the side away from the inner wall to which it is attached. In addition, it can be set according to choice whether the elastic member 3 abuts against the opposite two inner walls forming the liquid cooling flow channel. If one side surface of the elastic member 3 is attached to the inner wall of one side of the liquid cooling flow channel 11, a gap is left between the other side of the elastic member 3 and the inner wall on the opposite side of the liquid cooling flow channel 11. That is, when the plate body 1 is squeezed, after the elastic deformation generated by itself reaches a certain degree, the elastic member 3 abuts against the two opposite side walls of the plate body 1 to form a support for the plate body 1.

[0050] The elastic member 3 can be arranged on the top surface or the bottom surface of the plate body 1, or on one of the opposite side walls of the plate body 1, which is not limited herein. The connection method between the elastic member 3 and the inner wall of the plate body 1 can be selected as welding, bonding or abutting, etc., as long as the elastic member 3 can be kept from displacing in the liquid cooling flow channel 11. The specific connection method adopted by the elastic member 3 and the plate body 1 can be selected according to needs by itself, which is not limited herein.

[0051] In this embodiment, in order to improve the support effect of the elastic member 3 on the plate body 1 and expand the function of the elastic member 3, the elastic member 3 abuts against the two opposite inner walls of the liquid cooling flow channel 11 respectively, dividing the liquid cooling flow channel 11 into two independent cavities.

[0052] Specifically, the elastic member 3 abuts against the two opposite inner walls of the liquid cooling flow channel 11, which can not only improve the further support effect on the cavity of the plate body 1, but also divide the liquid cooling flow channel 11 into two independent cavities, facilitating the series / parallel setting of the liquid cooling flow channel 11 in the whole liquid cooling system.

[0053] In some embodiments, in order to facilitate the assembly of the elastic member 3, an assembly structure 2 is provided in the liquid cooling flow channel 11 of the plate body 1. The assembly structure 2 includes two first positioning ribs 21, and the two first positioning ribs 21 are arranged along the length direction of the liquid cooling flow channel 11, that is, the flow direction of the coolant in the liquid cooling flow channel 11. The two first positioning ribs 21 are arranged on the inner wall on the same side to facilitate the installation and positioning of the elastic member 3. The elastic member 3 is assembled between the two first positioning ribs 21, and the two first positioning ribs 21 abut against the elastic member 3 to facilitate the positioning of the elastic member 3. The elastic member 3 abuts against the inner wall where the first positioning rib 21 is located and the opposite inner wall respectively, so as to achieve the effect of the elastic member 3 supporting the liquid cooling flow channel 11.

[0054] Specifically, the plate body 1 is a hollow plate. The hollow structure of the plate body 1 constitutes a liquid cooling channel 11. An assembly structure 2 is provided in the hollow structure of the plate body 1. The assembly structure 2 includes two first positioning ribs 21. The two first positioning ribs 21 are arranged along the length direction of the liquid cooling channel 11, that is, the flow direction of the coolant in the liquid cooling channel 11. The two first positioning ribs 21 are arranged on the inner walls on the same side to facilitate the installation and positioning of the elastic member 3. The elastic member 3 is assembled between the two first positioning ribs 21, and the two first positioning ribs 21 abut against the elastic member 3 to facilitate the positioning of the elastic member 3. The elastic member 3 abuts against the inner wall where the first positioning rib 21 is located and the opposite inner wall respectively, so as to achieve the effect that the elastic member 3 supports the liquid cooling channel 11.

[0055] Correspondingly, the first positioning rib 21 can be arranged on the top surface or the bottom surface of the plate body 1, or on one of the opposite side walls of the plate body 1, which is not limited herein. In addition, it is best that the two first positioning ribs 21 are arranged in parallel. Of course, if the two first positioning ribs 21 are arranged obliquely, as long as they do not intersect and can insert the elastic member 3.

[0056] Refer to Figure 3 and Figure 4 As shown in the figure, in this embodiment, the inner wall of the plate body 1 has a first large surface 12 and a second large surface 13 arranged oppositely. The two first positioning ribs 21 are both arranged on the first large surface 12 or the second large surface 13. During the stress process, since the first large surface 12 and the second large surface 13 with larger areas are more likely to deform compared to other surfaces, it is more necessary to provide targeted support for the elastic member 3. By arranging the first positioning rib 21 on the first large surface 12 or the second large surface 13, when the elastic member 3 is installed, it can abut between the first large surface 12 and the second large surface 13, thereby effectively supporting the first large surface 12 and the second large surface 13, reducing the degree of deformation of the liquid cooling channel 11, and thus ensuring the flow effect of the liquid cooling channel 11.

[0057] In some embodiments, in order to ensure the maximum utilization of the elastic member 3, the vertical distance between the first large surface 12 and the second large surface 13 is set as B, the thickness of the battery cell adjacent to the plate body 1 is set as T, and the thickness of the battery cell is the length of the battery cell in the same direction as B. The maximum height of the first positioning rib 21 is set as H, then H = B - T * 3%. Specifically, by limiting the maximum height H of the first positioning rib 21, it can be ensured that when the battery cell expands, the liquid cooling plate can provide precise support, and it will not happen that when the elastic member 3 has not reached its maximum absorption performance due to the relatively high height of the first positioning rib 21, the first positioning rib 21 abuts against the opposite inner wall in advance, thereby affecting the absorption performance of the elastic member, and there will also be a situation where stress concentration occurs due to the first positioning rib 21 abutting against the opposite inner wall in advance, and even the plate body 1 may be damaged.

[0058] Refer to Figure 3and Figure 4 As shown in Figure 4 , in this embodiment, in order to ensure the positioning effect of the elastic member 3, the assembly structure 2 further includes a second positioning rib 22. Among the first positioning rib 21 and the second positioning rib 22, one is disposed on the first major surface 12 and the other is disposed on the second major surface 13. The second positioning rib 22 and the two first positioning ribs 21 are staggered. A clamping groove 33 is provided on the side of the elastic member 3 facing the second positioning rib 22, and the second positioning rib 22 is clamped with the clamping groove 33.

[0059] Specifically, by staggering the first positioning rib 21 and the second positioning rib 22 on the first major surface 12 and the second major surface 13, it is ensured that the elastic member 3 can maintain a preset stress posture during installation, preventing the elastic member 3 from undergoing plastic deformation due to external forces. And a clamping groove 33 is designed on the side of the elastic member 3 facing the second positioning rib 22 to form a clamping connection with the second positioning rib 22. It not only can play a certain guiding effect on the installation of the elastic member 3, but more importantly, it can also ensure that the elastic member 3 can accurately return to its position after bearing the thermal expansion pressure of the battery cell, thereby improving the reliability and service life of the entire liquid cooling system.

[0060] Refer to Figures 3-6 As shown in Figures 3-6 , in this embodiment, in order to further improve the stability and supportability of the elastic member 3, the distance between the second positioning rib 22 and the two first positioning ribs 21 is the same, that is, the connecting line between the cross-sections of the second positioning rib 22 and the two first positioning ribs 21 forms an isosceles triangle. With this structure, the uniform distribution of the elastic members 3 in the liquid cooling plate is ensured, so that when the entire plate body 1 is subjected to the expansion pressure of the battery cell, the stress distribution of each part is more uniform, reducing local stress concentration and avoiding deformation or damage caused by uneven local stress. In addition, the same distance makes the replacement and maintenance of the elastic member 3 more standardized, without the need to design multiple specifications of elastic members 3 for different distances, reducing the maintenance cost and complexity.

[0061] In this embodiment, the second positioning rib 22 is arranged parallel to the first positioning rib 21. Of course, it can also be arranged obliquely, as long as the normal installation of the elastic member 3 and the positioning of the elastic member 3 can be completed.

[0062] Refer to Figure 3 and Figure 5 As shown in Figure 3 and Figure 5 , in this embodiment, in order to improve the support effect on the liquid cooling channel 11, multiple groups of assembly structures 2 are provided along the height direction of the inner wall of the plate body 1. Through the above arrangement of multiple groups of assembly structures 2, when the liquid cooling plate is subjected to the expansion pressure of the battery cell, the pressure can be dispersed through the coordinated action of each positioning rib and the elastic member 3, preventing the deformation of the liquid cooling channel 11, thereby maintaining the stability and cooling effect of the liquid cooling system.

[0063] Furthermore, multiple groups of assembly structures 2 can be arranged at equal intervals. Such an arrangement can further improve the supporting effect of the elastic member 3 installed in the assembly structure 2 on the liquid cooling channel 11 and can evenly distribute the pressure on the outside of the plate body 1.

[0064] See also Figure 3 and Figure 5 As shown, in the present embodiment, in order for the elastic member 3 to share the external pressure more evenly, in two adjacent groups of assembly structures 2, the first positioning rib 21 of one group of assembly structures 2 is arranged on the first large surface 12, and the first positioning rib 21 of the other group of assembly structures 2 is arranged on the second large surface 13, that is, the first positioning rib 21 in the two adjacent groups of assembly structures 2 are arranged on different large surfaces, thereby ensuring that the elastic member 3 assembled in the first positioning rib 21 can also be arranged relatively accordingly, thereby avoiding deformation or damage caused by excessive pressure on one side, and improving the overall stability and durability of the structure.

[0065] On the basis of the structure that the assembly component includes the second positioning rib 22 , the second positioning rib 22 is arranged opposite to the first positioning rib 21 in the same family assembly structure 2 , so as to facilitate the positioning and installation of the elastic member 3 .

[0066] See also Figures 2-7 As shown, in some embodiments, the elastic member 3 is a rubber strip 31 or an elastic sheet 32. Specifically, the rubber strip 31 can be a solid rubber strip 31 or a hollow rubber strip 31, which can meet the support of the plate body 1, and the elastic sheet 32 ​​can be made of a metal or alloy material with elasticity and stable chemical properties, such as stainless steel. In this embodiment, the cross-section of the elastic member 3 (i.e., the rubber strip 31 or the elastic sheet 32) is triangular, and its top corner is provided with a clamping groove 33 to cooperate with the second positioning rib 22, and the two corner points opposite to the top corner are respectively against the two first positioning ribs 21 for positioning. In addition, the elastic member 3 can be set as a whole with a length equal to the length of the first positioning rib 21; it can also be set and fixed by discontinuously setting multiple elastic members 3 of shorter length between the two first positioning ribs 21, which can meet the support of the plate body 1.

[0067] See also Figures 1-7 As shown, in this embodiment, in order to facilitate the installation of the battery cell 5 on the liquid cooling plate, a pressure relief plate 4 is provided on at least one side of the bottom of the plate body 1. The pressure relief plate 4 has a pressure relief channel 41 and an exhaust port 42. The pressure relief channel 41 is provided in the pressure relief plate 4, and the exhaust port 42 is provided at the top of the pressure relief plate 4 to connect the top of the pressure relief plate 4 with the outside. Specifically, the pressure relief cavity of the battery cell 5 is provided corresponding to the exhaust port 42. When exhaust and / or pressure relief is required, the gas passes through the pressure relief cavity, the exhaust port 42, and the pressure relief channel 41 to the outside of the liquid cooling plate in sequence, so as to avoid the accumulation of hot gas and cause the internal temperature of the battery pack to continue to rise, thereby reducing the risk of thermal runaway.

[0068] In this embodiment, in order to adapt to the requirement of arranging battery cells 5 on both sides of the liquid cooling plate, pressure relief plates 4 are respectively arranged on both sides of the bottom of the plate body 1. The design of the double-sided pressure relief plates 4 enables the liquid cooling plate to better adapt to the sizes and layouts of different battery packs, enhancing the adaptability and versatility of the system.

[0069] Furthermore, there are multiple exhaust ports 42, and the multiple exhaust ports 42 are arranged along the length direction of the pressure relief channel 41. By arranging multiple exhaust ports 42, the settings of the exhaust ports 42 can be made according to needs to correspond to the settings of the pressure relief valves of the battery cells 5, so as to optimize battery thermal management and avoid battery performance degradation or safety problems caused by overheating. Specifically, the spacing between the multiple exhaust ports 42 can be set according to needs. In this embodiment, an equal-spacing setting is adopted to facilitate the use of the same specification of battery cells 5 and the design and production of the battery pack.

[0070] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present utility model.

Claims

1. A liquid cooling plate for cooling an electric cell, characterized in that It includes a plate body (1) with a cavity forming a liquid cooling channel (11) inside. An elastic member (3) is assembled in the liquid cooling channel (11). One side of the elastic member (3) is in contact with the inner wall on one side of the liquid cooling channel (11), and the elastic member (3) protrudes toward the side away from the inner wall in contact with it.

2. The liquid cooling plate according to claim 1, characterized in that, The elastic member (3) abuts against the two opposite inner walls of the liquid cooling channel (11) respectively, dividing the liquid cooling channel (11) into two independent cavities.

3. A liquid cooling plate according to claim 1, characterized in that, An assembly structure (2) is provided on the inner wall of the plate body (1). The assembly structure (2) includes two first positioning ribs (21). The two first positioning ribs (21) are arranged along the length direction of the liquid cooling channel (11), and the two first positioning ribs (21) are arranged on the same side of the inner wall. An elastic member (3) is assembled between the two first positioning ribs (21), and the elastic member (3) abuts against the inner wall where the first positioning ribs (21) are located and the opposite inner wall respectively.

4. The liquid cooling plate according to claim 3, characterized in that, The inner wall of the plate body (1) has a first large surface (12) and a second large surface (13) arranged opposite to each other. The two first positioning ribs (21) are both arranged on the first large surface (12) or the second large surface (13).

5. The liquid cooling plate according to claim 4, characterized in that, Set the vertical distance between the first large surface (12) and the second large surface (13) as B, the thickness of the battery cell adjacent to the plate body (1) as T, and the maximum height of the first positioning rib (21) as H, then H = B - T * 3%.

6. The liquid cooling plate according to claim 4, wherein, The assembly structure (2) further includes a second positioning rib (22). Among the first positioning rib (21) and the second positioning rib (22), one is arranged on the first large surface (12) and the other is arranged on the second large surface (13), and the second positioning rib (22) and the two first positioning ribs (21) are arranged in a staggered manner. A clamping groove (33) is provided on the side of the elastic member (3) facing the second positioning rib (22), and the second positioning rib (22) is clamped with the clamping groove (33).

7. The liquid cooling plate according to claim 6, wherein, The distances between the second positioning rib (22) and the two first positioning ribs (21) are the same.

8. A liquid cooling plate according to any one of claims 4-7, characterized in that, Multiple groups of the assembly structure (2) are provided on the inner wall of the plate body (1) along the height direction of the plate body (1).

9. The liquid cooling plate according to claim 8, wherein, In adjacent two groups of the assembly structure (2), the first positioning rib (21) of one group of the assembly structure (2) is arranged on the first large surface (12), and the first positioning rib (21) of the other group of the assembly structure (2) is arranged on the second large surface (13).

10. A liquid cooling plate according to claim 1, wherein, The elastic member (3) is a rubber strip (31) or an elastic sheet (32).

11. A liquid cooling plate according to claim 1, characterized in that, At least one side of the bottom of the plate body (1) is provided with a pressure relief plate (4). The pressure relief plate (4) has a pressure relief channel (41) and an exhaust port (42). The pressure relief channel (41) is arranged in the pressure relief plate (4), and the exhaust port (42) is arranged at the top of the pressure relief plate (4) to communicate the top of the pressure relief plate (4) with the outside.

12. A liquid cooling plate according to claim 11, characterized in that, The pressure relief plates (4) are respectively arranged on both sides of the bottom of the plate body (1).

13. A liquid cooling plate according to claim 11 or 12, characterized in that, A plurality of the exhaust ports (42) are provided, and the plurality of exhaust ports (42) are arranged along the length direction of the pressure relief channel (41).

Images