Battery cooling structure and battery pack

Abstract

The utility model relates to a battery cooling structure and a battery pack, and the battery cooling structure comprises a first liquid cooling plate which is provided with a first concave-convex surface and a second concave-convex surface which are sequentially distributed in a second direction, and a second liquid cooling plate which is provided with a third concave-convex surface and a fourth concave-convex surface which are sequentially distributed in the second direction, the second concave-convex surface and the third concave-convex surface are oppositely arranged and jointly form a plurality of first cooling cavities for accommodating batteries; the liquid inlet, the first liquid cooling plate, the second liquid cooling plate and the liquid outlet are communicated in sequence; and when two adjacent battery cooling structures are arranged in parallel along the second direction, the first concave-convex surface of one battery cooling structure is opposite to the fourth concave-convex surface of the other battery cooling structure, so that a plurality of second cooling cavities for accommodating batteries are formed together. The battery cooling structure disclosed by the utility model is simple in structure and good in heat exchange effect, and can improve the space utilization rate after battery packs are grouped, the cooling efficiency and the overall safety.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cooling structure and a battery pack. Background Art

[0002] The battery pack generates heat during the charging and discharging process, which needs to be dissipated in time. As the energy density of the battery pack increases, the heat dissipation demand also increases. Good heat dissipation can greatly prevent the dangerous hidden dangers caused by thermal runaway.

[0003] In existing technology, a liquid cooling plate is typically installed on one side of the battery to dissipate heat. This results in a small heat exchange area and poor cooling effect. Furthermore, single-sided liquid cooling can cause one side of the battery to have a higher temperature than the other, which can affect battery life. Some cooling structures also address the issues of single-sided liquid cooling by installing a liquid cooling plate on each side of the battery. However, these cooling structures are complex and poorly configured, resulting in low space utilization and increased assembly tolerances when the battery pack is assembled. Utility Model Content

[0004] Based on the above-mentioned defects in the prior art, the purpose of the present invention is to provide a battery cooling structure with a simple structure and good heat exchange effect, which can improve the space utilization of battery packs after grouping, improve cooling efficiency, and improve overall safety.

[0005] To this end, the present invention provides the following technical solutions.

[0006] The utility model provides a battery cooling structure, which includes:

[0007] A first liquid cooling plate, the length of which extends along a first direction and the thickness of which extends along a second direction, and the first concave-convex surface and the second concave-convex surface are sequentially distributed in the second direction.

[0008] a second liquid cooling plate, having a length extending along the first direction and a thickness extending along the second direction, and having a third concave-convex surface and a fourth concave-convex surface sequentially distributed along the second direction, wherein the second concave-convex surface and the third concave-convex surface are arranged opposite to each other and together form a plurality of first cooling cavities for accommodating batteries;

[0009] a liquid inlet and a liquid outlet, wherein the liquid inlet, the first liquid cooling plate, the second liquid cooling plate and the liquid outlet are connected in sequence;

[0010] When two adjacent battery cooling structures are arranged side by side along the second direction, the first concave-convex surface of one of them faces the fourth concave-convex surface of the other, thereby jointly forming a plurality of second cooling cavities for accommodating batteries.

[0011] Optionally, the first liquid cooling plate and the second liquid cooling plate have the same width, so that the heat exchange area provided by the first liquid cooling plate is equal to the heat exchange area provided by the second liquid cooling plate.

[0012] Optionally, the first liquid cooling plate and the second liquid cooling plate are staggered in a third direction, wherein the third direction is a height direction of the battery.

[0013] Optionally, the width of the first liquid cooling plate is smaller than the width of the second liquid cooling plate, so that the heat exchange area provided by the first liquid cooling plate is smaller than the heat exchange area provided by the second liquid cooling plate.

[0014] Optionally, the number of the first liquid cooling plates is at least two; and / or the number of the second liquid cooling plates is at least two;

[0015] The second liquid cooling plate and the first liquid cooling plate are alternately staggered in sequence in the third direction.

[0016] Optionally, a total heat exchange area provided by the first liquid cooling plate of the battery cooling structure is smaller than a total heat exchange area provided by the second liquid cooling plate of the battery cooling structure.

[0017] Optionally, the number of the first liquid cooling plate is one, and the number of the second liquid cooling plate is two;

[0018] The two second liquid cooling plates are respectively used to cool the two end portions of one side of the battery, and the first liquid cooling plate is used to cool the middle portion of the other side of the battery.

[0019] Optionally, the battery cooling structure includes:

[0020] A first current collecting member is fixed to one end of the first liquid cooling plate and the second liquid cooling plate in the first direction, and is provided with a liquid inlet, a liquid inlet cavity connected to the liquid inlet, a liquid outlet, and a liquid outlet cavity connected to the liquid outlet;

[0021] A second current collecting member is fixed to the other end of the first liquid cooling plate and the second liquid cooling plate in the first direction, and is provided with a transfer cavity respectively connected to the first liquid cooling plate and the second liquid cooling plate;

[0022] The liquid inlet cavity is connected to the first liquid cooling plate, and the liquid outlet cavity is connected to the second liquid cooling plate, so that the liquid inlet, the liquid inlet cavity, the first liquid cooling plate, the transfer cavity, the second liquid cooling plate, the liquid outlet cavity and the liquid outlet are connected in sequence to form a cooling liquid flow channel.

[0023] Optionally, the first liquid cooling plate is provided with first cooling fins extending along a third direction;

[0024] And / or, the second liquid cooling plate is provided with second cooling fins extending along the third direction;

[0025] And / or, the battery cooling structure extends from one axial end to the other axial end of the battery;

[0026] The third direction is the height direction of the battery.

[0027] The utility model also provides a battery pack, comprising:

[0028] The battery cooling structure as described above;

[0029] a plurality of batteries, wherein the plurality of batteries are arranged in sequence along the first direction, and each of the first cooling chambers can accommodate one of the batteries;

[0030] When two adjacent battery cooling structures are arranged side by side along the second direction, each of the second cooling cavities can accommodate one battery.

[0031] The utility model has the following technical effects:

[0032] The utility model provides a battery cooling structure. The second concave-convex surface of a first liquid cooling plate faces the third concave-convex surface of a second liquid cooling plate, forming a first cooling cavity. This structure can simultaneously cool both sides of a battery within the first cooling cavity, improving heat exchange capacity and ensuring more uniform heat exchange. Furthermore, multiple battery cooling structures can be combined in parallel to form a cooling system. Multiple second cooling cavities can be formed between adjacent battery cooling structures to further cool other batteries, improving cooling efficiency and overall safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of a three-dimensional structure in which two battery cooling structures are arranged side by side in the first embodiment of the present utility model;

[0034] Figure 2 This is a top view of the structure in which two battery cooling structures are arranged side by side in the first embodiment of the present utility model;

[0035] Figure 3 This is a schematic diagram of the three-dimensional structure of the battery pack in the first embodiment of the present invention;

[0036] Figure 4 This is a top view of the battery cooling structure in the first embodiment of the present invention;

[0037] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0038] Figure 6 for Figure 4 Enlarged view of point B in the middle;

[0039] Figure 7 This is an exploded view of the structure of the battery pack in the first embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the three-dimensional structure of a battery pack in the second embodiment of the present invention;

[0041] Figure 9 This is a structural cross-sectional view of a battery pack in a second embodiment of the present invention;

[0042] Figure 10 This is an exploded view of the structure of the battery pack in the third embodiment of the present invention;

[0043] Figure 11 Schematic diagram of the three-dimensional structure of the battery pack in the third embodiment of the present invention;

[0044] Figure 12 This is a cross-sectional view of the structure of the battery pack in the third embodiment of the present invention. Figure 1 ;

[0045] Figure 13 This is a cross-sectional view of the structure of the battery pack in the third embodiment of the present invention. Figure 2 ;

[0046] Figure 14 Schematic diagram of the three-dimensional structure of the battery pack in the fourth embodiment of the present invention Figure 1 ;

[0047] Figure 15 Schematic diagram of the three-dimensional structure of the battery pack in the fourth embodiment of the present invention Figure 2 .

[0048] Description of Reference Numerals

[0049] 100. Battery pack;

[0050] 1. Battery cooling structure;

[0051] 11. First liquid cooling plate; 111. First concave-convex surface; 112. Second concave-convex surface; 113. First cooling fin;

[0052] 12. Second liquid cooling plate; 121. Third concave-convex surface; 122. Fourth concave-convex surface; 123. Second cooling fin;

[0053] 13. First cooling chamber;

[0054] 14. First manifold; 141. Liquid inlet; 142. Liquid outlet; 143. Liquid inlet cavity; 144. Liquid outlet cavity; 1441. First liquid outlet chamber; 1442. Second liquid outlet chamber;

[0055] 15. Second current collecting member; 151. Transfer chamber; 1511. First transfer chamber; 1512. Second transfer chamber; 1513. Third transfer chamber;

[0056] 2. Battery;

[0057] 3. The second cooling chamber. DETAILED DESCRIPTION

[0058] To make the technical solutions and beneficial effects of the present invention more clearly understood, the following describes the present invention in detail by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0059] In the description of the present invention, unless otherwise expressly defined, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of simplifying the description of the present invention, and do not indicate that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and should not be understood as a limitation to the present invention.

[0060] In this utility model, the terms "first" and "second" are used solely for descriptive clarity and should not be construed as indicating the relative importance of the features indicated or the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, and "several" means at least one, unless expressly specified otherwise.

[0061] In this utility model, unless otherwise expressly defined, the terms "install," "connect," "connect," "fix," "dispose," etc. should be understood broadly. For example, "connection" can mean fixed connection, detachable connection, or integral molding; it can be mechanical or electrical; it can be direct connection or indirect connection through an intermediary; it can also refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0062] In the present invention, unless otherwise clearly defined, when a first feature is “on,” “above,” “above,” “above,” “below,” “below,” or “below” a second feature, the first feature and the second feature may be in direct contact, or the first feature and the second feature may be in indirect contact via an intermediate medium. Moreover, when a first feature is “on,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0063] The following is based on Figures 1 to 15 The battery cooling structure of the present utility model is described in detail.

[0064] In this embodiment, if Figure 1 、 Figure 3 and Figure 7 As shown, the battery pack 100 includes a battery cooling structure 1 and a plurality of batteries 2. The battery cooling structure 1 includes a first liquid cooling plate 11, a second liquid cooling plate 12, a liquid inlet 141, and a liquid outlet 142. The length of the first liquid cooling plate 11 extends along the first direction a and the thickness extends along the second direction b. The length of the second liquid cooling plate 12 extends along the first direction a and the thickness extends along the second direction b. The first liquid cooling plate 11 and the second liquid cooling plate 12 are respectively provided with a cooling liquid accommodating cavity. The liquid inlet 141, the first liquid cooling plate 11, the second liquid cooling plate 12, and the liquid outlet 142 are sequentially connected. In this way, the cooling liquid enters from the liquid inlet 141, flows through the first liquid cooling plate 11 and the second liquid cooling plate 12 in sequence, and is discharged from the liquid outlet 142. As shown Figures 1 to 3As shown, the first liquid cooling plate 11 has a first concave-convex surface 111 and a second concave-convex surface 112 sequentially distributed in the second direction b, and the second liquid cooling plate 12 has a third concave-convex surface 121 and a fourth concave-convex surface 122 sequentially distributed in the second direction b. The first liquid cooling plate 11 is located on one side of the battery 2 in the second direction b, and the second liquid cooling plate 12 is located on the other side of the battery 2 in the second direction b. The second concave-convex surface 112 and the third concave-convex surface 121 are arranged opposite each other and together form a plurality of first cooling cavities 13 for accommodating the battery 2. The first concave-convex surface 111 and the second concave-convex surface 112 each extend in a meandering manner along the first direction a, with the concave-convex portions arranged at intervals. The third concave-convex surface 121 and the fourth concave-convex surface 122 extend in a meandering manner along the first direction a, with the concave-convex portions arranged at intervals, thereby forming a plurality of first cooling cavities 13. The plurality of batteries 2 are arranged in sequence along the first direction a, and each first cooling cavity 13 can accommodate a single battery 2. For example, the second concave-convex surface 112 and the third concave-convex surface 121 are arranged facing each other to form ten first cooling cavities 13. These ten first cooling cavities 13 are distributed sequentially along the first direction a. Ten batteries 2 are arranged in a row along the first direction a and housed in corresponding first cooling cavities 13. Thus, one battery cooling structure 1 and ten batteries 2 constitute a single-row battery pack. The cooling cavities not only cool both sides of the battery, improving cooling efficiency, but also limit the battery position, enhancing battery connection reliability.

[0065] When a single battery cooling structure 1 cannot meet the cooling requirements of a large-capacity battery pack 100, the battery pack 100 needs to be combined with multiple battery cooling structures 1 in parallel to form a cooling system to cool more batteries 2. Figure 1 and Figure 3 As shown, when two adjacent battery cooling structures 1 are arranged side by side along the second direction b, the first concave-convex surface 111 of one of them faces the fourth concave-convex surface 122 of the other, and the first concave-convex surface 111 and the fourth concave-convex surface 122 extend in a winding manner along the first direction a to jointly form a plurality of second cooling cavities 3 for accommodating batteries 2. In this way, each second cooling cavity 3 can accommodate another battery 2.

[0066] By adopting this technical solution, the battery cooling structure 1 simultaneously cools both sides of the battery 2 located within the first cooling cavity 13 via the second concave-convex surface 112 of the first liquid cooling plate 11 and the third concave-convex surface 121 of the second liquid cooling plate 12, thereby improving heat exchange capacity and making heat exchange more uniform. Furthermore, a cooling system formed by combining multiple battery cooling structures 1 in parallel can form multiple second cooling cavities 3 between adjacent battery cooling structures 1, improving cooling efficiency and increasing space utilization after battery packs are grouped, reducing the number of liquid cooling plates required, and lowering cooling system costs.

[0067] It should be understood that the "first direction a", "second direction b" and "third direction c" mentioned herein are all in the Figure 1 、 Figure 3 、 Figure 8 、 Figure 9 、 Figures 11 to 15 The first direction a represents the length of the first and second liquid cooling plates 11, 12. The second direction b represents the thickness of the first and second liquid cooling plates 11, 12. The third direction c represents the height of the battery 2. The battery 2 is typically cylindrical, and the axial direction of the battery 2 is the height of the battery 2.

[0068] In one embodiment, if Figure 3 and Figure 7 As shown, the widths of the first liquid cooling plate 11 and the second liquid cooling plate 12 are equal, so that the heat exchange area provided by the first liquid cooling plate 11 is equal to the heat exchange area provided by the second liquid cooling plate 12. Furthermore, in order to improve the heat exchange effect of the first liquid cooling plate 11 and the second liquid cooling plate 12 on both sides of the battery 2, as shown in FIG. Figure 3 As shown, the first liquid cooling plate 11 and the second liquid cooling plate 12 extend from one axial end to the other axial end of the battery 2, respectively. That is, the dimensions of the first liquid cooling plate 11 and the second liquid cooling plate 12 in the third direction c are equal to or slightly smaller than the axial dimension of the battery 2 to increase the heat exchange area.

[0069] In one embodiment, if Figure 8 and Figure 9 As shown, the first and second liquid cooling plates 11, 12 are staggered in the third direction c. This reduces their dimensions in the third direction c while ensuring effective heat exchange, thereby saving on cooling plate costs and reducing their overall weight. This staggered arrangement also allows for separate cooling of different locations within the same battery, increasing the diversity of cooling solutions.

[0070] Furthermore, if Figure 8 and Figure 9 As shown, the first liquid cooling plate 11 and the second liquid cooling plate 12 are completely staggered in the third direction c, so as to save the cost of the liquid cooling plates and reduce the total weight of the liquid cooling plates.

[0071] Furthermore, in order to ensure the heat exchange effect of the battery cooling structure 1 on the battery 2, the battery cooling structure 1 extends from one axial end to the other axial end of the battery 2. In a specific embodiment, Figure 8 and Figure 9As shown, the first liquid cooling plate 11 is located above the second liquid cooling plate 12. The first liquid cooling plate 11 exchanges heat with one side of the upper portion of the battery 2, and the second liquid cooling plate 12 exchanges heat with the other side of the lower portion of the battery 2. There is no spacing or a small spacing between the first and second liquid cooling plates 11, 12 in the third direction c, so that the battery cooling structure 1 composed of the first and second liquid cooling plates 11, 12 can extend from one axial end to the other axial end of the battery 2, ensuring the heat exchange effect. The battery pole is set upward, and the temperature at the battery pole position is higher than that at other positions. The first liquid cooling plate 11 is closer to the battery pole than the second liquid cooling plate 12, and the coolant with a lower temperature is closer to the battery pole, which can improve the cooling effect.

[0072] Furthermore, since the coolant introduced into the liquid inlet 141 first enters the first liquid cooling plate 11, absorbs part of the heat of the battery 2, and then enters the second liquid cooling plate 12, the temperature of the first liquid cooling plate 11 is lower than that of the second liquid cooling plate 12 which provides the same heat exchange area. In this solution, Figure 8 and Figure 9 As shown, the width of the first liquid cooling plate 11 is configured to be smaller than the width of the second liquid cooling plate 12, so that the heat exchange area provided by the first liquid cooling plate 11 is smaller than the heat exchange area provided by the second liquid cooling plate 12. In this way, the temperature difference between the first liquid cooling plate 11 and the second liquid cooling plate 12 can be reduced, thereby reducing the temperature difference between the two sides of the battery 2 after cooling, and balancing the heat exchange strength on both sides. Among them, the width of the first liquid cooling plate 11 represents the dimension of the first liquid cooling plate 11 in the third direction c, and the width of the second liquid cooling plate 12 represents the dimension of the second liquid cooling plate 12 in the third direction c.

[0073] In one embodiment, the number of the first liquid-cooling plates 11 is at least two, and the number of the second liquid-cooling plates 12 can be one or more, and the second liquid-cooling plates 12 and the first liquid-cooling plates 11 are alternately staggered in sequence along the third direction c. In this way, all the first liquid-cooling plates 11 can be arranged spaced apart along the third direction c. By controlling the spacing between two adjacent first liquid-cooling plates 11, the total weight of all the first liquid-cooling plates 11 can be controlled while ensuring the heat exchange effect, which is beneficial to reducing the total weight of the battery cooling structure. Furthermore, the total heat exchange area provided by the first liquid-cooling plates 11 of the battery cooling structure 1 is smaller than the total heat exchange area provided by the second liquid-cooling plates 12, so as to reduce the temperature difference on both sides of the battery 2 and balance the heat exchange intensity on both sides.

[0074] In one embodiment, the number of the second liquid-cooling plates 12 is at least two, and the number of the first liquid-cooling plates 11 can be one or more, and the second liquid-cooling plates 12 and the first liquid-cooling plates 11 are staggered and arranged alternately in the third direction c. In this way, all the second liquid-cooling plates 12 can be arranged spaced apart along the third direction c. By controlling the spacing between two adjacent second liquid-cooling plates 12, the total weight of all the second liquid-cooling plates 12 can be controlled while ensuring the heat exchange effect, which is beneficial to reducing the total weight of the battery cooling structure. Furthermore, the total heat exchange area provided by the first liquid-cooling plate 11 of the battery cooling structure 1 is smaller than the total heat exchange area provided by the second liquid-cooling plate 12, so as to reduce the temperature difference on both sides of the battery 2 and balance the heat exchange intensity on both sides.

[0075] In one embodiment, Figure 10 and Figure 11 As shown, there is one first liquid-cooling plate 11 and two second liquid-cooling plates 12. The two second liquid-cooling plates 12 are used to cool the two end portions of one side of the battery 2, respectively, and the first liquid-cooling plate 11 is used to cool the middle portion of the other side of the battery 2. In this way, the heat exchange area provided by the battery cooling structure 1 for both sides of the battery 2 is rationally planned, while also ensuring that the overall structure of the battery cooling structure 1 is simple. Specifically, the heat exchange areas provided by the first liquid-cooling plate 11 and the second liquid-cooling plate 12 are equal. Since the coolant enters the first liquid-cooling plate 11 first, the cooling capacity provided by the first liquid-cooling plate 11 is greater than that provided by the second liquid-cooling plate 12. In this solution, the number of the second liquid-cooling plate 12 is one more than the first liquid-cooling plate 11. In this way, the total heat exchange area provided by the two second liquid-cooling plates 12 is greater than the heat exchange area provided by the first liquid-cooling plate 11, which can reduce the temperature difference after cooling of the two sides of the battery 2. Of course, the heat exchange area provided by the first liquid cooling plate 11 can also be larger than the heat exchange area provided by one second liquid cooling plate 12, and smaller than the heat exchange area provided by two second liquid cooling plates 12, so as to reduce the temperature difference between the two sides of the battery 2 after cooling. That is, by controlling the heat exchange areas of the first liquid cooling plate 11 and the second liquid cooling plate 12 and the number of liquid cooling plates, the heat exchange effect and the uniformity of heat exchange on both sides of the battery 2 can be improved.

[0076] In one embodiment, if Figure 14 As shown, the first liquid cooling plate 11 is provided with first cooling fins 113 extending along the third direction c. Specifically, the length of the first cooling fins 113 extends along the first direction a, and the width extends along the third direction c. This ensures a sufficient heat exchange area while reducing the cost of the liquid cooling plate. In one embodiment, the first liquid cooling plate 11 is used to cool the middle portion of one side of the battery 2. In this case, the first liquid cooling plate 11 is provided with two first cooling fins 113, which are respectively connected to the sidewalls of the liquid cooling body of the first liquid cooling plate 11 in the third direction c. The liquid cooling body includes a cooling liquid receiving chamber. The first cooling fins 113 may not be provided with a cooling liquid receiving chamber.

[0077] In one embodiment, if Figure 15 As shown, the second liquid cooling plate 12 is provided with second cooling fins 123 extending along the third direction c. Specifically, the length of the second cooling fins 123 extends along the first direction a and the width extends along the third direction c. This ensures a sufficient heat exchange area while reducing the cost of the liquid cooling plate. The first cooling fins 113 and the second cooling fins 123 expand the cooling contact area and improve the heat exchange effect.

[0078] In one embodiment, if Figure 1 、 Figures 4 to 6 As shown, the battery cooling structure 1 includes a first current collecting member 14 and a second current collecting member 15. The first current collecting member 14 is fixed to one end of the first liquid cooling plate 11 and the second liquid cooling plate 12 in the first direction a. The first current collecting member 14 is provided with a liquid inlet 141, a liquid inlet cavity 143 connected to the liquid inlet 141, a liquid outlet 142, and a liquid outlet cavity 144 connected to the liquid outlet 142. The second current collecting member 15 is fixed to the other end of the first liquid cooling plate 11 and the second liquid cooling plate 12 in the first direction a. The second current collecting member 15 is provided with a transfer cavity 151 respectively connected to the first liquid cooling plate 11 and the second liquid cooling plate 12. The liquid inlet cavity 143 is connected to the first liquid cooling plate 11, and the liquid outlet cavity 144 is connected to the second liquid cooling plate 12. This connects the liquid inlet 141, the liquid inlet cavity 143, the first liquid cooling plate 11, the transfer cavity 151, the second liquid cooling plate 12, the liquid outlet cavity 144, and the liquid outlet 142 in sequence, forming a coolant flow channel. Coolant enters the first manifold 14 through the liquid inlet cavity 143 and enters the first liquid cooling plate 11. After absorbing some of the heat from the battery 2, the coolant in the first liquid cooling plate 11 enters the second liquid cooling plate 12 through the transfer cavity 151, and is ultimately discharged through the liquid outlet cavity 144 and the liquid outlet 142.

[0079] Furthermore, if Figure 11 As shown, there is one first liquid cooling plate 11 and two second liquid cooling plates 12. The two second liquid cooling plates 12 are used to cool the two ends of one side of the battery 2, and the first liquid cooling plate 11 is used to cool the middle part of the other side of the battery 2. Figure 12 and Figure 13As shown, the transfer chamber 151 includes a first transfer chamber 1511, a second transfer chamber 1512 and a third transfer chamber 1513 which are interconnected. The first transfer chamber 1511, the second transfer chamber 1512 and the third transfer chamber 1513 are sequentially distributed along the third direction c. The liquid outlet chamber 144 includes a first liquid outlet chamber 1441 and a second liquid outlet chamber 1442 which are interconnected. The first liquid outlet chamber 1441, the liquid inlet chamber 143 and the second liquid outlet chamber 1443 are interconnected. 42 are distributed in sequence along the third direction c, the first liquid cooling plate 11 is connected to the liquid inlet chamber 143 and the second transfer chamber 1512 respectively, one of the second liquid cooling plates 12 is connected to the first transfer chamber 1511 and the first liquid outlet chamber 1441 respectively, the other second liquid cooling plate 12 is connected to the third transfer chamber 1513 and the second liquid outlet chamber 1442 respectively, and the liquid outlet 142 is connected to one of the first liquid outlet chamber 1441 and the second liquid outlet chamber 1442.

[0080] After the coolant is introduced into the liquid inlet 141, the coolant enters the first liquid cooling plate 11 through the liquid inlet chamber 143, and then enters the second transfer chamber 1512. The coolant in the second transfer chamber 1512 flows into the first transfer chamber 1511 and the third transfer chamber 1513 respectively, and then enters the two second liquid cooling plates 12 respectively. The coolant in one second liquid cooling plate 12 flows into the first liquid outlet chamber 1441, and the coolant in the other second liquid cooling plate 12 flows into the second liquid outlet chamber 1442. The coolant in the first liquid outlet chamber 1441 and the second liquid outlet chamber 1442 are both discharged through the liquid outlet 142. The chamber layout of the first collecting member 14 and the second collecting member 15 of this solution is reasonable, which is conducive to the miniaturization design of the first collecting member 14 and the second collecting member 15. The first collecting member 14 and the second collecting member 15 are connected to the first liquid cooling plate 11 and the second liquid cooling plate 12 at the same time, thereby simplifying the structure and improving the generation efficiency.

[0081] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations of the claims. Various modifications and variations may be made to the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form additional embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments merely illustrate several implementations of the present invention and do not limit the scope of protection of the present utility model patent.

Claims

1. A battery cooling structure, characterized in that: The battery cooling structure (1) comprises: A first liquid cooling plate (11) has a length extending along a first direction (a) and a thickness extending along a second direction (b), and has a first concave-convex surface (111) and a second concave-convex surface (112) sequentially distributed in the second direction (b). A second liquid cooling plate (12) has a length extending along a first direction (a) and a thickness extending along a second direction (b), and has a third concave-convex surface (121) and a fourth concave-convex surface (122) sequentially distributed in the second direction (b), wherein the second concave-convex surface (112) and the third concave-convex surface (121) are arranged facing each other and together form a plurality of first cooling cavities (13) for accommodating batteries (2); a liquid inlet (141) and a liquid outlet (142), wherein the liquid inlet (141), the first liquid cooling plate (11), the second liquid cooling plate (12), and the liquid outlet (142) are sequentially connected; When two adjacent battery cooling structures (1) are arranged side by side along the second direction (b), the first concave-convex surface (111) of one of them and the fourth concave-convex surface (122) of the other face each other, thereby jointly forming a plurality of second cooling cavities (3) for accommodating batteries (2).

2. The battery cooling structure according to claim 1, characterized in that: The widths of the first liquid cooling plate (11) and the second liquid cooling plate (12) are equal, so that the heat exchange area provided by the first liquid cooling plate (11) is equal to the heat exchange area provided by the second liquid cooling plate (12).

3. The battery cooling structure according to claim 1, characterized in that: The first liquid cooling plate (11) and the second liquid cooling plate (12) are staggered in a third direction (c), wherein the third direction (c) is the height direction of the battery (2).

4. The battery cooling structure according to claim 3, characterized in that: The width of the first liquid cooling plate (11) is smaller than the width of the second liquid cooling plate (12), so that the heat exchange area provided by the first liquid cooling plate (11) is smaller than the heat exchange area provided by the second liquid cooling plate (12).

5. The battery cooling structure according to claim 3, characterized in that: The number of the first liquid cooling plates (11) is at least two; and / or the number of the second liquid cooling plates (12) is at least two; The second liquid cooling plate (12) and the first liquid cooling plate (11) are alternately staggered in sequence in the third direction (c).

6. The battery cooling structure according to claim 5, characterized in that: The total heat exchange area provided by the first liquid cooling plate (11) of the battery cooling structure (1) is smaller than the total heat exchange area provided by the second liquid cooling plate (12) thereof.

7. The battery cooling structure according to claim 6, characterized in that: The number of the first liquid cooling plate (11) is one, and the number of the second liquid cooling plate (12) is two; The two second liquid cooling plates (12) are respectively used to cool the two end portions of one side of the battery (2), and the first liquid cooling plate (11) is used to cool the middle portion of the other side of the battery (2).

8. The battery cooling structure according to any one of claims 1 to 7, characterized in that: The battery cooling structure (1) comprises: A first current collecting member (14) is fixed to one end of the first liquid cooling plate (11) and the second liquid cooling plate (12) in the first direction (a), and is provided with a liquid inlet (141), a liquid inlet cavity (143) communicating with the liquid inlet (141), a liquid outlet (142), and a liquid outlet cavity (144) communicating with the liquid outlet (142); A second current collecting member (15) is fixed to the other end of the first liquid cooling plate (11) and the second liquid cooling plate (12) at one end in the first direction (a), and is provided with a transfer cavity (151) respectively connected to the first liquid cooling plate (11) and the second liquid cooling plate (12); The liquid inlet cavity (143) is connected to the first liquid cooling plate (11), and the liquid outlet cavity (144) is connected to the second liquid cooling plate (12), so that the liquid inlet (141), the liquid inlet cavity (143), the first liquid cooling plate (11), the transfer cavity (151), the second liquid cooling plate (12), the liquid outlet cavity (144) and the liquid outlet (142) are connected in sequence to form a cooling liquid flow channel.

9. The battery cooling structure according to any one of claims 1 to 7, characterized in that: The first liquid cooling plate (11) is provided with a first cooling fin (113) extending along a third direction (c); And / or, the second liquid cooling plate (12) is provided with second cooling fins (123) extending along the third direction (c); And / or, the battery cooling structure (1) extends from one axial end to the other axial end of the battery (2); Wherein, the third direction (c) is the height direction of the battery (2).

10. A battery pack, characterized in that: include: The battery cooling structure (1) according to any one of claims 1 to 9; a plurality of batteries (2), wherein the plurality of batteries (2) are arranged in sequence along the first direction (a), and each of the first cooling chambers (13) can accommodate one of the batteries (2); When two adjacent battery cooling structures (1) are arranged side by side along the second direction (b), each of the second cooling cavities (3) can accommodate one battery (2).

Images