Liquid cooling plate, battery pack and vehicle

Abstract

The utility model provides a liquid cooling plate, a battery pack and a vehicle, the liquid cooling plate is internally provided with an interlayer and a plurality of first flow channel cavities for circulating a cooling medium, and along the thickness direction of the liquid cooling plate, the liquid cooling plate is of a symmetrical structure by taking the interlayer as an axis; the plurality of first flow channel cavities are arranged at intervals along the height direction of the liquid cooling plate, each first flow channel cavity comprises a first cavity wall arranged along the height direction of the liquid cooling plate, the first cavity wall is a cambered surface, and the curvature center of the cambered surface is arranged deviating from the interlayer. According to the liquid cooling plate disclosed by the utility model, in the expansion process of the battery monomers, the liquid cooling plate can deform to a certain degree under the large-surface extrusion of the battery monomers so as to adapt to the expansion of the battery monomers, and the expansion of the battery monomers cannot be hindered, so that the influence on the charging and discharging capability of the battery monomers can be avoided, and the normal work of a battery pack can be maintained. Meanwhile, the interlayer can avoid excessive deformation of the liquid cooling plate, and the use reliability of the liquid cooling plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack heat dissipation, and particularly relates to a liquid cooling plate, a battery pack and a vehicle. Background Art

[0002] During the charging and discharging process of battery cells in a power battery pack, a large amount of heat is generated, causing the temperature inside the battery pack to rise. If the temperature inside the battery pack is too high, it will lead to a decline in the charging and discharging ability of the battery cells, and even thermal runaway may occur, resulting in the battery pack catching fire and exploding. Therefore, a liquid cooling plate is usually provided inside the battery pack to dissipate heat from the battery cells, so as to maintain the temperature inside the battery pack within the normal range and ensure the normal operation of the battery pack.

[0003] Currently, the heat dissipation of battery cells by the liquid cooling plate mainly adopts the bottom cooling method. With the wide use of fast charging battery packs, the power of battery cells increases, and the heat generation also increases significantly. The traditional bottom cooling cannot effectively meet the heat dissipation requirements of high-power battery cells. Therefore, in some fast charging battery packs, a liquid cooling plate is arranged between the large surfaces of battery cells to increase the heat dissipation effect on battery cells.

[0004] However, since the large surfaces of battery cells will expand during the charging and discharging process, the arrangement of the liquid cooling plate will hinder the expansion of battery cells, easily leading to overpressure on the large surfaces of battery cells, and further affecting the heat dissipation ability and charging and discharging ability of battery cells. Summary of the Utility Model

[0005] In view of this, the utility model aims to provide a liquid cooling plate, a battery pack and a vehicle to at least solve the problem that the existing liquid cooling plate is prone to hinder the expansion of battery cells and affect the charging and discharging ability of battery cells.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] The utility model provides a liquid cooling plate, in which a partition layer and a plurality of first flow channel cavities for circulating a cooling medium are arranged; along the thickness direction of the liquid cooling plate, the liquid cooling plate is symmetrically structured with the partition layer as the axis; the plurality of first flow channel cavities are arranged at intervals along the height direction of the liquid cooling plate, wherein each first flow channel cavity includes a first cavity wall arranged along the height direction of the liquid cooling plate, the first cavity wall is an arc surface, and the center of curvature of the arc surface is arranged away from the partition layer.

[0008] Furthermore, each first flow channel cavity includes a first cavity and a second cavity, and the first cavity and the second cavity are symmetrically structured with the partition layer as the axis.

[0009] Further, the cavity wall of the first cavity close to the partition layer is an arc surface, and the cavity wall of the second cavity close to the partition layer is an arc surface.

[0010] Further, along the thickness direction of the liquid cooling plate, the thickness dimension of the partition layer is 0.3 mm to 0.7 mm.

[0011] Further, a plurality of second flow channel cavities for circulating a cooling medium are further provided in the liquid cooling plate. The plurality of second flow channel cavities are arranged at intervals along the height direction of the liquid cooling plate, and each second flow channel cavity is adjacent to at least one first flow channel cavity.

[0012] Further, the cavity wall of the second flow channel cavity close to the first flow channel cavity is an arc surface, and the center of curvature of the arc surface is arranged away from the partition layer.

[0013] Further, along the thickness direction of the liquid cooling plate, the dimension between the cavity wall of the first flow channel cavity away from the partition layer and the surface of the liquid cooling plate is 0.7 mm to 1 mm; and / or, along the thickness direction of the liquid cooling plate, the dimension between the cavity wall of the second flow channel cavity away from the partition layer and the surface of the liquid cooling plate is 0.7 mm to 1 mm.

[0014] The present utility model further provides a battery pack, including the liquid cooling plate described in any one of the foregoing items.

[0015] Further, the battery pack further includes a plurality of battery cells; the plurality of battery cells are stacked in a straight line arrangement, and the liquid cooling plate is disposed in the gap between adjacent battery cells, and the liquid cooling plate is in contact with the largest surface of the battery cells.

[0016] The present utility model further provides a vehicle, including the battery pack described above.

[0017] Compared with the prior art, the liquid cooling plate, the battery pack and the vehicle of the present utility model have the following advantages:

[0018] A plurality of first flow channel cavities for circulating a cooling medium are provided in the liquid cooling plate of the present utility model. The first cavity wall of each first flow channel cavity arranged along the height direction of the liquid cooling plate is an arc surface, and the center of curvature of the arc surface is arranged away from the center of the liquid cooling plate, so that the bending direction of the arc surface is adapted to the expansion direction of the large surface of the battery cell. During the expansion process of the battery cell, the liquid cooling plate can undergo a certain deformation under the extrusion of the large surface of the battery cell to adapt to the expansion of the battery cell, and will not hinder the expansion of the battery cell, thereby avoiding affecting the charge and discharge capacity of the battery cell and helping to maintain the normal operation of the battery pack. At the same time, the partition layer can prevent the liquid cooling plate from being overly deformed, ensure the structural stability of the liquid cooling plate, and improve the use reliability of the liquid cooling plate.

[0019] The battery pack and the vehicle have the same advantages as the above-mentioned liquid cooling plate compared with the prior art, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0021] Figure 1 is a partial schematic view of a liquid cooling plate according to an embodiment of the present utility model;

[0022] Figure 2 is a partial schematic view of another liquid cooling plate according to an embodiment of the present utility model;

[0023] Figure 3 is Figure 2 a partial enlarged schematic view;

[0024] Figure 4 is a schematic view of a battery pack according to an embodiment of the present utility model;

[0025] Figure 5 is a schematic view inside a battery pack according to an embodiment of the present utility model.

[0026] DESCRIPTION OF THE REFERENCE NUMERALS:

[0027] 11 - First flow channel cavity, 110 - First cavity wall, 111 - First cavity body, 112 - Second cavity body, 12 - Interlayer, 13 - Second flow channel cavity, 130 - Second cavity wall, 131 - Third cavity body, 132 - Fourth cavity body, 10 - Liquid cooling plate, 20 - Liquid cooling pipeline, 30 - Battery cell, 40 - Box body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other. The described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0029] In the description and claims of the present utility model, terms such as "first", "second", etc. are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances, so that the embodiments of the present utility model can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0030] It should be understood that "some embodiments" mentioned throughout the description means that specific features, structures, or characteristics related to the embodiments are included in at least one embodiment of the present utility model. Therefore, "in some embodiments" that appears throughout the description does not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner.

[0031] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] Referring to Figures 1 to 5 , an embodiment of the present utility model provides a liquid cooling plate 10, in which a partition layer 12 and a plurality of first flow channel cavities 11 for circulating a cooling medium are provided; along the thickness direction of the liquid cooling plate 10, the liquid cooling plate 10 is symmetrically structured with the partition layer 12 as the axis; the plurality of first flow channel cavities 11 are spaced along the height direction of the liquid cooling plate 10, wherein each first flow channel cavity 11 includes a first cavity wall 110 arranged along the height direction of the liquid cooling plate 10, the first cavity wall 110 is an arc surface, and the center of curvature of the arc surface is arranged away from the partition layer 12.

[0033] Specifically, the liquid cooling plate 10 of the embodiment of the present utility model can be applied to a fast-charging battery pack, and is arranged between the large surfaces of two adjacent battery cells 30, or between the large surface of the battery cell 30 and the battery pack box body. The liquid cooling plate 10 abuts against the large surface of the battery cell 30. During the charging and discharging process of the battery cell 30, heat conduction occurs between the liquid cooling plate 10 and the large surface of the battery cell 30, thereby realizing the cooling and heat dissipation of the battery cell 30. Since the abutting area between the liquid cooling plate 10 and the large surface of the battery cell 30 is large, the cooling and heat dissipation effect of the battery cell 30 can be effectively improved, the heat dissipation requirements of the high-power battery cell 30 can be met, and the temperature inside the battery pack can be kept within a reasonable range. The liquid cooling plate 10 can be made of a plate with high strength and stiffness such as a copper plate, an aluminum plate, a stainless steel plate, a composite material plate, etc., and at the same time has good heat resistance, thermal conductivity, corrosion resistance, etc., and can achieve long-term and effective cooling and heat dissipation effects.

[0034] The liquid cooling plate 10 is provided with a plurality of first flow channel cavities 11 for circulating a cooling medium. The cooling and heat dissipation of the liquid cooling plate 10 are substantially realized by relying on the cooling medium. During the flow of the cooling medium, the heat generated during the charge and discharge process of the battery cell 30 can be absorbed and carried out of the battery pack. Among them, the cooling medium can be pure water, ethylene glycol aqueous solution, etc., and the specific type is not limited in this embodiment. The plurality of first flow channel cavities 11 are arranged at intervals along the height direction of the liquid cooling plate 10. The height direction of the liquid cooling plate 10 is as shown in the Z direction in Figure 1 and Figure 2 At the same time, the plurality of first flow channels extend along the length direction of the liquid cooling plate 10. The length direction of the liquid cooling plate 10 is as shown in the Y direction in Figure 4 and Figure 5 The end of the liquid cooling plate 10 along its length direction is provided with a liquid cooling pipeline 20. The ends of the plurality of first flow channel cavities 11 along the Y direction are interconnected to form a flow channel structure arranged in an "S" - shaped meandering manner, and the first flow channel cavity 11 located at the edge is communicated with the liquid cooling pipeline 20. The liquid cooling pipeline 20 is used to transport the cooling medium to the first flow channel cavity 11 or discharge the cooling medium in the first flow channel cavity 11.

[0035] Each first flow channel cavity 11 includes a first cavity wall 110 arranged along the height direction (Z direction) of the liquid cooling plate 10. As shown in each first flow channel cavity 11 in Figure 1 There are two first cavity walls 110, and the first cavity wall 110 is an arc surface. During the charge and discharge process of the battery cell 30, the battery cell 30 will expand, resulting in the large surface of the battery cell 30 protruding outward. The outward protrusion of the large surface of the battery cell 30 will generate a certain extrusion force on the liquid cooling plate 10. Setting the first cavity wall 110 of the first flow channel cavity 11 as an arc surface can endow the liquid cooling plate 10 with a certain elastic deformation ability. At the same time, the center of curvature of the arc surface faces away from the partition layer 12, that is, the center of curvature of the arc surface faces the large surface of the battery cell 30, so that the bending direction of the arc surface is adapted to the expansion direction of the large surface of the battery cell 30. Thus, during the expansion process of the battery cell 30, the liquid cooling plate 10 can undergo a certain deformation under the extrusion of the large surface of the battery cell 30 to adapt to the expansion of the battery cell 30, and will not hinder the expansion of the battery cell 30, thereby avoiding affecting the charge and discharge ability of the battery cell 30 and maintaining the normal operation of the battery pack.

[0036] In addition, it should be noted that if the liquid cooling plate 10 is disposed between the large surfaces of two adjacent battery cells 30, both of the two first cavity walls 110 of the first flow channel cavity 11 can be set as arc surfaces, so that the liquid cooling plate 10 has better deformation ability and can better adapt to the expansion of the battery cell 30; if the liquid cooling plate 10 is disposed between the large surface of the battery cell 30 and the battery pack box body, the first cavity wall 110 of the first flow channel cavity 11 close to the large surface of the battery cell 30 can be set as an arc surface, and the first cavity wall 110 of the first flow channel cavity 11 close to the battery pack box body can be set as a plane, so as to increase the cavity volume of the first flow channel cavity 11 and improve the cooling and heat dissipation effect of the liquid cooling plate 10.

[0037] The partition layer 12 is a plate-like structure, and the partition layer 12 and the liquid cooling plate 10 can be designed as an integrally formed structure. On the one hand, the subsequent assembly and connection steps can be omitted. On the other hand, the gap between the partition layer 12 and the liquid cooling plate 10 caused by the assembly and connection can be avoided, so as to prevent the leakage of the cooling medium. The partition layer 12 is disposed at the central position of the liquid cooling plate 10. Along the thickness direction of the liquid cooling plate 10, the thickness direction of the liquid cooling plate 10 is as shown by the X direction in Figure 1 and Figure 2 . Along the X direction, the liquid cooling plate 10 is a symmetric structure with the partition layer 12 as the axis. The partition layer 12 can prevent the liquid cooling plate 10 from deforming too much when being extruded by the large surface of the battery cell 30, thereby avoiding damage to the liquid cooling plate 10 and ensuring the use reliability of the liquid cooling plate 10. At the same time, setting the partition layer 12 at the central position of the liquid cooling plate 10 can also ensure that the deformation amount on one side of the liquid cooling plate 10 does not exceed half of the total thickness of the liquid cooling plate 10, thereby ensuring the structural stability of the liquid cooling plate 10.

[0038] Further, referring to Figure 2 , in some embodiments, each of the first flow channel cavities 11 includes a first cavity 111 and a second cavity 112, and the first cavity 111 and the second cavity 112 are symmetric structures with the partition layer 12 as the axis.

[0039] Specifically, the first cavity 111 and the second cavity 112 can be set as independent cavities, that is, the first cavity 111 and the second cavity 112 are respectively communicated with the liquid cooling pipeline 20 to independently circulate the cooling medium. This structure is convenient for processing and helps to control the processing cost of the liquid cooling plate 10. The first cavity 111 and the second cavity 112 can also be set as interconnected cavities, and the ends of the first cavity 111 and the second cavity 112 along the length direction (Y direction) of the liquid cooling plate 10 are interconnected, so that the cooling media in the first cavity 111 and the second cavity 112 can flow mutually. This structure helps to improve the uniformity of the liquid cooling plate 10 for cooling and dissipating heat from the battery cell 30.

[0040] Further, referring to Figure 2, when the first flow channel cavity 11 includes a first cavity 111 and a second cavity 112, the cavity wall of the first cavity 111 close to the partition layer 12 is an arc surface, and the cavity wall of the second cavity 112 close to the partition layer 12 is an arc surface. The centers of curvature of the two arc surfaces are both arranged away from the partition layer 12. The bending degrees of the two arc surfaces can be the same or different, and can be specifically set according to the expansion condition of the large surface of the battery cell 30. This embodiment does not limit this.

[0041] Further, referring to Figure 3 , in some embodiments, along the thickness direction (X direction) of the liquid cooling plate 10, the thickness dimension of the partition layer 12 is 0.3 mm to 0.7 mm. Among them, the thickness dimension of the partition layer 12 is as shown by L1 in Figure 3 . Setting the thickness dimension of the partition layer 12 within the above range can not only ensure the strength and stiffness of the partition layer 12, so that the partition layer 12 plays an effective supporting role for the first cavity 111 and the second cavity 112, and avoid excessive deformation of the liquid cooling plate 10, but also avoid the excessive thickness of the liquid cooling plate 10, thereby helping to control the total weight of the liquid cooling plate 10. Exemplarily, when the thickness of the liquid cooling plate 10 is relatively thin and the volumes of the first cavity 111 and the second cavity 112 are relatively small, the thickness dimension of the partition layer 12 can be set to 0.3 mm to control the total weight of the liquid cooling plate 10; when the thickness of the liquid cooling plate 10 is relatively thick and the volumes of the first cavity 111 and the second cavity 112 are relatively large, the thickness dimension of the partition layer 12 can be set to 0.7 mm to meet the effective support of the partition layer 12 for the first cavity 111 and the second cavity 112, and avoid damage to the liquid cooling plate 10 caused by damage or fracture of the partition layer 12; in other cases, the thickness dimension of the partition layer 12 can be set to 0.5 mm to better balance the supporting effect of the partition layer 12 and the total weight of the liquid cooling plate 10, and optimize the structural design of the liquid cooling plate 10.

[0042] Further, referring to Figure 2 , in some embodiments, a plurality of second flow channel cavities 13 for circulating a cooling medium are further provided in the liquid cooling plate 10. The plurality of second flow channel cavities 13 are arranged at intervals along the height direction of the liquid cooling plate 10, and each second flow channel cavity 13 is adjacent to at least one first flow channel cavity 11.

[0043] Specifically, the second flow channel cavity 13 is arranged between two adjacent first flow channel cavities 11, or between the first flow channel cavity 11 and the end of the liquid cooling plate 10. The second flow channel cavity 13 is also used for circulating the cooling medium, thereby improving the ability of the liquid cooling plate 10 to circulate the cooling medium, and correspondingly improving the cooling and heat dissipation effect of the liquid cooling plate 10 on the battery cell 30.

[0044] As shown in Figure 2As shown, the second flow channel cavity 13 may include a third cavity 131 and a fourth cavity 132. The third cavity 131 and the fourth cavity 132 are symmetrically structured with the partition layer 12 as the axis. The third cavity 131 and the fourth cavity 132 may be set as independent cavities, that is, the third cavity 131 and the fourth cavity 132 are respectively connected to the liquid cooling pipeline 20 to independently circulate the cooling medium; the third cavity 131 and the fourth cavity 132 may also be set as interconnected cavities, that is, the ends of the third cavity 131 and the fourth cavity 132 along the length direction (Y direction) of the liquid cooling plate 10 are interconnected, so that the cooling medium in the third cavity 131 and the fourth cavity 132 can flow to each other, thereby improving the uniformity of the liquid cooling plate 10 in cooling and dissipating heat from the battery cell 30.

[0045] Further, referring to Figure 2 , in some embodiments, the cavity wall of the second flow channel cavity 13 on the side close to the first flow channel cavity 11 is an arc surface. In this embodiment, the cavity wall of the second flow channel cavity 13 on the side close to the first flow channel cavity 11 is referred to as the second cavity wall 130. The second cavity wall 130 is an arc surface, and the center of curvature of this arc surface is set away from the partition layer 12. Specifically, the curvature of this arc surface can be set to be the same as that of the arc surface of the first flow channel cavity 11 to better disperse the force on the arc surface, make the structures of the first flow channel cavity 11 and the second flow channel cavity 13 more reasonable, and be more helpful for improving the deformation ability of the liquid cooling plate 10.

[0046] Further, referring to Figure 3 , in some embodiments, along the thickness direction (X direction) of the liquid cooling plate 10, the dimension between the cavity wall of the first flow channel cavity 11 on the side away from the partition layer 12 and the surface of the liquid cooling plate 10 is 0.7 mm to 1 mm; and / or, along the thickness direction of the liquid cooling plate 10, the dimension between the cavity wall of the second flow channel cavity 13 on the side away from the partition layer 12 and the surface of the liquid cooling plate 10 is 0.7 mm to 1 mm.

[0047] Specifically, the cavity wall of the first flow channel cavity 11 on the side away from the partition layer 12 refers to the cavity wall of the first cavity 111 on the side away from the partition layer 12 and the cavity wall of the second cavity 112 on the side away from the partition layer 12. The dimension between the cavity wall of the first cavity 111 on the side away from the partition layer 12 and the surface of the liquid cooling plate 10 is as shown by L2 in Figure 3 , and the dimension between the cavity wall of the second cavity 112 on the side away from the partition layer 12 and the surface of the liquid cooling plate 10 is as shown by L3 in Figure 3 . The dimensions of L2 and L3 represent the outer wall thickness of the liquid cooling plate 10. The dimensions of L2 and L3 are both within the range of 0.7 mm to 1 mm to ensure the strength and stiffness of the liquid cooling plate 10 and avoid excessive deformation or even damage of the liquid cooling plate 10 due to its too thin thickness.

[0048] Exemplarily, when the volumes of the first cavity 111 and the second cavity 112 are small, the flow capacity of the cooling medium in the first cavity 111 and the second cavity 112 is weak. In this case, the dimensions of L2 and L3 can be set to 0.7 mm to meet the effective support of the first cavity 111 and the second cavity 112 and avoid tearing or damage to the liquid cooling plate 10. When the volumes of the first cavity 111 and the second cavity 112 are large, the flow capacity of the cooling medium in the first cavity 111 and the second cavity 112 is strong. In this case, the dimensions of L2 and L3 can be set to 1 mm to meet the effective support of the first cavity 111 and the second cavity 112 and cause tearing or damage to the liquid cooling plate 10.

[0049] In addition, during the expansion process of the battery cell 30, since the surface of the liquid cooling plate 10 contacts the large surface of the battery cell 30 and the extrusion force received is large, the dimensions of L2 and L3 can be set to be larger than the dimension of L1. That is, the outer wall thickness of the liquid cooling plate 10 is greater than the thickness of the partition layer 12, so as to further improve the stability of the liquid cooling plate 10 when it is deformed by force on the basis of the unchanged thickness of the liquid cooling plate 10.

[0050] The embodiment of the present utility model further provides a battery pack, including the liquid cooling plate 10 described in any one of the foregoing embodiments.

[0051] Specifically, the battery pack further includes a box body 40, a cover plate, battery units, a control component, etc. The box body 40 has a receiving cavity. The battery units are arranged in the receiving cavity. The battery units are formed by connecting a plurality of battery cells 30 in series or in parallel to realize the charge and discharge functions of the battery pack. The control component is electrically connected to the battery units and can monitor the temperature, voltage, current, etc. of the battery units during the charge and discharge process of the battery units to ensure the safe progress of the charge and discharge process of the battery units. The cover plate is fixedly connected to the box body 40 and is used to cover the receiving cavity to protect the battery units and the control component inside the receiving cavity and prevent external water vapor, dust, etc. from entering the receiving cavity and affecting the performance of the battery units.

[0052] The liquid cooling plate 10 constitutes a cooling and heat dissipation system inside the battery pack. The liquid cooling plate 10 is arranged between the large surfaces of two adjacent battery cells 30 or between the large surface of the battery cell 30 and the inner wall of the box body 40. The liquid cooling plate 10 abuts against the large surface of the battery cell 30 and conducts heat with the large surface of the battery cell 30, thereby realizing the cooling and heat dissipation of the battery cell 30. The first flow channel cavity 11 of the liquid cooling plate 10 is provided with an arc surface, and the bending direction of the arc surface is adapted to the expansion direction of the large surface of the battery cell 30. During the expansion process of the battery cell 30, the liquid cooling plate 10 can undergo a certain deformation under the extrusion of the large surface of the battery cell 30 to adapt to the expansion of the battery cell 30. Thus, the liquid cooling plate 10 will not hinder the expansion of the battery cell 30 and will not affect the charge and discharge capacity of the battery cell 30, which helps to improve the charge and discharge performance of the battery pack and realize the fast charge and fast discharge of the battery pack.

[0053] Further, referring to Figure 3 and Figure 4 , in some embodiments, the battery pack further includes a plurality of battery cells 30; the plurality of battery cells 30 are stacked in a linear arrangement, and the liquid cooling plate 10 is disposed in the gap between adjacent battery cells 30, and the liquid cooling plate 10 abuts against the largest surface of the battery cell 30.

[0054] Specifically, the battery cell 30 may be in the shape of a cube, and the plurality of battery cells 30 are stacked in a linear arrangement. The arrangement direction may be the direction consistent with the body length of the vehicle, such as Figure 3 and Figure 4 the X direction shown schematically. Along the X direction, a gap for installing the liquid cooling plate 10 is reserved between adjacent battery cells 30. The liquid cooling plate 10 can be inserted and fixed in this gap, and both sides of the liquid cooling plate 10 can respectively abut against the largest surfaces of battery cells 30 at different positions, so as to realize large-area heat dissipation and cooling with the battery cell 30.

[0055] The present invention also provides a vehicle, including the battery pack of the foregoing embodiment.

[0056] Specifically, the vehicle may be a pure electric vehicle or a hybrid vehicle. The vehicle is applied with the battery pack of the foregoing embodiment, so that the battery pack can have good fast charging and discharging capabilities, which helps to alleviate the charging anxiety and range anxiety of the vehicle.

[0057] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or terminal device including the element.

[0058] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid cooling plate, characterized in that: The liquid cooling plate is provided with an interlayer and a plurality of first flow channel cavities for circulating cooling medium; Along the thickness direction of the liquid cooling plate, the liquid cooling plate is symmetrically structured with the interlayer as the axis; A plurality of the first flow channel cavities are arranged at intervals along the height direction of the liquid cooling plate, wherein each of the first flow channel cavities includes a first cavity wall arranged along the height direction of the liquid cooling plate, the first cavity wall is a curved surface, and the center of curvature of the curved surface is arranged away from the partition.

2. The liquid cooling plate according to claim 1, characterized in that: Each of the first flow channel cavities includes a first cavity and a second cavity, and the first cavity and the second cavity are symmetrically structured with the partition as an axis.

3. The liquid cooling plate according to claim 2, characterized in that: The cavity wall of the first cavity close to the partition layer is a curved surface, and the cavity wall of the second cavity close to the partition layer is a curved surface.

4. The liquid cooling plate according to claim 1, characterized in that: Along the thickness direction of the liquid cooling plate, the thickness of the partition layer is 0.3 mm to 0.7 mm.

5. The liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate is further provided with a plurality of second flow channel cavities for circulating cooling medium, the plurality of second flow channel cavities are arranged at intervals along the height direction of the liquid cooling plate, and each of the second flow channel cavities is adjacent to at least one of the first flow channel cavities.

6. The liquid cooling plate according to claim 5, characterized in that: The cavity wall of the second flow channel cavity on a side close to the first flow channel cavity is a curved surface, and the center of curvature of the curved surface is arranged away from the partition layer.

7. The liquid cooling plate according to claim 5, characterized in that: Along the thickness direction of the liquid cooling plate, the dimension between the cavity wall of the first flow channel cavity on the side away from the partition and the surface of the liquid cooling plate is 0.7 mm to 1 mm; And / or, along the thickness direction of the liquid cooling plate, a dimension between a cavity wall of the second flow channel cavity on a side away from the barrier layer and a surface of the liquid cooling plate is 0.7 mm to 1 mm.

8. A battery pack, characterized in that: The battery pack comprises the liquid cooling plate according to any one of claims 1 to 7.

9. The battery pack according to claim 8, characterized in that: The battery pack also includes a plurality of battery cells; The plurality of battery cells are stacked and arranged in a straight line, the liquid cooling plate is arranged in the gap between the adjacent battery cells, and the liquid cooling plate abuts against the largest surface of the battery cells.

10. A vehicle, characterized in that: A battery pack comprising the battery pack described in claim 8 or claim 9.

Images