Liquid cooling plate

Abstract

The present application discloses a liquid cooling plate, comprising a cold plate body. The cold plate body is provided with a main liquid inlet channel and a main liquid outlet channel which extend in the length direction of the cold plate body; one end of the main liquid inlet channel forms an input port in the cold plate body, and one end of the main liquid outlet channel forms an output port in the cold plate body; a plurality of cooling areas are arranged on the cold plate body between the main liquid inlet channel and the main liquid outlet channel at intervals in the length direction of the cold plate body; a zigzag cooling channel is defined in each cooling area, one end of the cooling channel is communicated with the main liquid inlet channel, and the other end of the cooling channel is communicated with the main liquid outlet channel; and zigzag paths of the cooling channels are different. By means of partition design of the cold plate body, the overall temperature difference of a battery pack is reduced, thereby ensuring normal operation of the battery pack.

Description

Liquid cooling plate

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202322187134.6, filed with the Chinese Patent Office on August 14, 2023, entitled “Liquid Cooling Plate,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a liquid cooling plate. Background Art

[0004] Battery packs using liquid cooling currently face increasingly stringent temperature differential requirements across the entire pack, gradually narrowing the typical 10°C temperature differential to 8°C or even 5°C. This poses a significant challenge to thermal balance across the entire pack. Existing liquid-cooled battery packs utilize a single cooling plate with no differentiated flow path design for different locations on the cell. This results in significant temperature differentials across the entire pack, increasing the risk of thermal runaway.

[0005] Application Contents

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a liquid cooling plate that can improve the temperature uniformity of the entire battery pack and reduce the temperature difference of the entire battery pack.

[0007] According to the embodiment of the present application, the liquid cooling plate includes a cold plate body, which has a main liquid inlet channel and a main liquid outlet channel extending along its length direction, one end of the main liquid inlet channel forms an input port on the cold plate body, and one end of the main liquid outlet channel forms an output port on the cold plate body, and a plurality of cooling zones along its length direction are spaced apart on the cold plate body between the main liquid inlet channel and the main liquid outlet channel, each cooling zone is defined by a tortuous cooling channel, one end of the cooling channel is connected to the main liquid inlet channel, and the other end of the cooling channel is connected to the main liquid outlet channel; the tortuous paths of the cooling channels are different.

[0008] According to the liquid cooling plate of the embodiment of the present application, the cooling main board is designed to be partitioned to reduce the temperature difference of the entire battery pack to ensure the normal operation of the battery pack.

[0009] In addition, the liquid cooling plate according to the present application may also have the following additional technical features:

[0010] In some embodiments, the liquid cooling plate further includes: a first cooling zone, a second cooling zone and a third cooling zone are spaced apart along the length direction of the cold plate body between the main liquid inlet channel and the main liquid outlet channel, a tortuous first cooling channel is defined in the first cooling zone, one end of the first cooling channel is connected to the main liquid inlet channel, and the other end of the first cooling channel is connected to the main liquid outlet channel; a tortuous second cooling channel is defined in the second cooling zone, one end of the second cooling channel is connected to the main liquid inlet channel, and the other end of the second cooling channel is connected to the main liquid outlet channel; a tortuous third cooling channel is defined in the third cooling zone, one end of the third cooling channel is connected to the main liquid inlet channel, and the other end of the third cooling channel is connected to the main liquid outlet channel; wherein the tortuous path of the first cooling channel, the tortuous path of the second cooling channel and the tortuous path of the third cooling channel are all different.

[0011] In some embodiments, the liquid cooling plate further includes: a first branch liquid inlet channel, one end of the first branch liquid inlet channel is connected to the main liquid inlet channel, and the other end extends along the length direction of the cold plate body, and the first cooling channel and the second cooling channel are both connected to the main liquid inlet channel through the first branch liquid inlet channel.

[0012] In some embodiments, the first cooling flow channel includes a first direct flow section and a first circuitous flow section, the first direct flow section extends along the length direction of the cold plate body, a plurality of first direct flow sections are provided, and the first circuitous flow section is used to connect two adjacent first direct flow sections.

[0013] In some embodiments, the second cooling flow channel includes: a first branch flow channel, the first branch flow channel includes a second direct current segment and a second circuitous segment, a plurality of second direct current segments are provided, the second circuitous segment is used to connect two adjacent second direct current segments, each of the second direct current segments includes a plurality of first branch direct current segments, and the plurality of first branch direct current segments extend along the width direction of the cold plate body and are parallel to each other.

[0014] In some embodiments, the second cooling channel further includes: a second branch channel, the first branch channel and the second branch channel are symmetrical along a symmetry line, and the symmetry line extends along the width direction of the cold plate body.

[0015] In some embodiments, in the length direction of the cold plate body, the first branch channel has a first liquid inlet at one end adjacent to the symmetry line, and has a first liquid outlet at one end away from the symmetry line. The liquid cooling plate further comprises: an outgoing liquid flow channel, the outgoing liquid flow channel extending along the length direction of the cold plate body, the middle portion of the outgoing liquid flow channel being connected to the main liquid outlet channel, and the two ends of the outgoing liquid flow channel being respectively connected to the first liquid outlet of the first branch channel and the first liquid outlet of the second branch channel.

[0016] In some embodiments, the liquid cooling plate further includes: a second branch liquid inlet channel, one end of the second branch liquid inlet channel is connected to the main liquid inlet channel, and the other end extends along the length direction of the cold plate body, and in the length direction of the cold plate body, the third cooling channel has a second liquid inlet and a third liquid inlet on both sides, and the middle of the third cooling channel has a second liquid outlet, the second liquid inlet is connected to the other end of the second branch liquid inlet channel, the third liquid inlet is connected to the other end of the main liquid inlet channel, and the second liquid outlet is connected to the main liquid outlet channel.

[0017] In some embodiments, the third cooling channel includes: a third direct current segment and a third detour segment, and there are multiple third direct current segments. The third detour segment is used to connect two adjacent third direct current segments, and each of the third direct current segments includes multiple second branch direct current segments, and the multiple second branch direct current segments extend along the width direction of the cold plate body and are parallel to each other; and / or, the cross-sectional area of ​​the first cooling channel is smaller than the cross-sectional area of ​​the second cooling channel, and the cross-sectional area of ​​the second cooling channel is smaller than the cross-sectional area of ​​the third cooling channel.

[0018] In some embodiments, the main liquid inlet channel has two, namely the first main liquid inlet channel and the second main liquid inlet channel, and there is only one main liquid outlet channel. Along the width direction of the cold plate body, the two main liquid inlet channels are respectively arranged on both sides of the cold plate body, and the main liquid outlet channel is arranged in the middle of the cold plate body, wherein the first cooling channel, the second cooling channel and the third cooling channel located between the first main liquid inlet channel and the main liquid outlet channel, and the first cooling channel, the second cooling channel and the third cooling channel located between the second main liquid inlet channel and the main liquid outlet channel are symmetrical about the central axis of the main liquid outlet channel.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a front view of a liquid cooling plate according to an embodiment of the present application;

[0021] FIG2 is an enlarged view of area A in FIG1 ;

[0022] FIG3 is an enlarged view of area B in FIG1 ;

[0023] FIG4 is a front view of a liquid cooling plate (excluding cooling channels) according to an embodiment of the present application.

[0024] Reference numerals:

[0025] 100. Liquid cooling plate;

[0026] 1. Cold plate body; 11. Main liquid inlet channel; 12. Main liquid outlet channel; 13. First cooling zone; 14. Second cooling zone; 15. Third cooling zone; 16. First branch liquid inlet channel; 17. Branch liquid outlet channel; 18. Second branch liquid inlet channel; 111. First main liquid inlet channel; 112. Second main liquid inlet channel; 131. First cooling channel; 141. Second cooling channel; 151. Third cooling channel; 1311. First direct flow section; 1312. First circuitous flow section; 1411. First branch channel; 1412. Second branch channel; 1511. Second liquid inlet; 1512. Third liquid inlet; 1513. Second liquid outlet; 1514. Third direct flow section; 1515. Third circuitous section;

[0027] 2. Second direct flow section; 3. Second circuitous section; 4. First liquid inlet; 5. First liquid outlet. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0032] The liquid cooling plate 100 according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 4 .

[0033] As shown in Figures 1 to 4, the liquid cooling plate 100 according to the embodiment of the present application includes a cold plate body 1, which has a main liquid inlet channel 11 and a main liquid outlet channel 12 extending along its length direction. One end of the main liquid inlet channel 11 forms an input port on the cold plate body 1, and one end of the main liquid outlet channel 12 forms an output port on the cold plate body 1. A plurality of cooling zones along its length direction are spaced apart on the cold plate body 1 between the main liquid inlet channel 11 and the main liquid outlet channel 12, and a tortuous cooling channel is defined in each cooling zone. One end of the cooling channel is connected to the main liquid inlet channel 11, and the other end of the cooling channel is connected to the main liquid outlet channel 12; the tortuous paths of each cooling channel are different.

[0034] In this embodiment, the cold plate body 1 is used to cool the battery pack to ensure the normal operation of the battery pack and avoid thermal runaway of the battery pack; the cold plate body 1 adopts a partitioned design to perform partitioned cooling on different positions of the battery cells in the battery pack. The heat generation between different positions or areas of the battery cells varies greatly. The partitioned cooling design can concentrate cooling on areas with large heat generation, thereby effectively reducing the temperature difference of the entire battery pack and ensuring the safe operation of the battery pack.

[0035] According to the liquid cooling plate 100 of the embodiment of the present application, the cooling main board is designed to be partitioned to reduce the temperature difference of the entire battery pack, thereby ensuring the normal operation of the battery pack.

[0036] In one embodiment of the present application, as shown in Figures 1 to 4, the liquid cooling plate 100 further includes a first cooling zone 13, a second cooling zone 14, and a third cooling zone 15 spaced apart along its length on the cold plate body 1 between the main liquid inlet channel 11 and the main liquid outlet channel 12. A tortuous first cooling channel 131 is defined in the first cooling zone 13, one end of the first cooling channel 131 is connected to the main liquid inlet channel 11, and the other end of the first cooling channel 131 is connected to the main liquid outlet channel 12; a tortuous first cooling channel 131 is defined in the second cooling zone 14. Second cooling channel 141, one end of the second cooling channel 141 is connected to the main liquid inlet channel 11, and the other end of the second cooling channel 141 is connected to the main liquid outlet channel 12; a tortuous third cooling channel 151 is defined in the third cooling zone 15, one end of the third cooling channel 151 is connected to the main liquid inlet channel 11, and the other end of the third cooling channel 151 is connected to the main liquid outlet channel 12; wherein, the tortuous path of the first cooling channel 131, the tortuous path of the second cooling channel 141 and the tortuous path of the third cooling channel 151 are all different.

[0037] In this embodiment, the first cooling channel 131, the second cooling channel 141 and the third cooling channel 151 can be matched with the corresponding first cooling zone 13, the second cooling zone 14 and the third cooling zone 15 respectively to cool the battery cell areas corresponding to the first cooling zone 13, the second cooling zone 14 and the third cooling zone 15. The first cooling channel 131, the second cooling channel 141 and the third cooling channel 151 are all designed to be tortuous, so that the coverage area of ​​the channel can be effectively increased, thereby improving the cooling effect of the channel; the tortuous path of the first cooling channel 131, the tortuous path of the second cooling channel 141 and the tortuous path of the third cooling channel 151 can be designed separately according to their corresponding battery cell areas to ensure that the cooling effect reaches the preset target and the temperature difference meets the index requirements.

[0038] In a specific embodiment of the present application, as shown in Figures 1 to 4, the liquid cooling plate 100 further includes: a first liquid inlet channel 16, one end of the first liquid inlet channel 16 is connected to the main liquid inlet channel 11, and the other end extends along the length direction of the cold plate body 1, and the first cooling channel 131 and the second cooling channel 141 are both connected to the main liquid inlet channel 11 through the first liquid inlet channel 16. In this specific embodiment, the first liquid inlet channel 16 can simultaneously transport coolant to the first cooling channel 131 and the second cooling channel 141, so that coolant can flow into the first cooling channel 131 and the second cooling channel 141 at the same time, and the battery cells in the first cooling zone 13 and the second cooling zone 14 can be cooled at the same time, so that the temperature difference between the battery cells in the first cooling zone 13 and the second cooling zone 14 is small; in addition, the design of the first liquid inlet channel 16 increases the coverage area of ​​the cooling channel, thereby improving the cooling effect of the cooling body.

[0039] In a specific embodiment of the present application, as shown in Figures 1 to 4, the first cooling channel 131 includes a first direct flow section 1311 and a first detour flow section 1312. The first direct flow section 1311 extends along the length of the cold plate body 1. Multiple first direct flow sections 1311 are provided, and the first detour flow section 1312 is used to connect two adjacent first direct flow sections 1311. In this specific embodiment, the first direct flow section 1311 cools the battery cells in the length direction of the first cooling zone 13, and the first detour flow section 1312 cools the battery cells in the width direction of the first cooling zone 13. The first direct flow section 1311 and the first detour flow section 1312 cooperate to effectively increase the coverage area of ​​the first cooling channel 131, thereby effectively cooling the battery cells in the first cooling zone 13.

[0040] For example, as shown in Figure 2, the first detour flow section 1312 is designed to be arc-shaped, and two adjacent first direct flow sections 1311 are connected through the arc-shaped first detour flow section 1312 to form a "U"-shaped cooling channel. Multiple first direct flow sections 1311 are parallel in the width direction of the cooling body, which effectively increases the cooling area and improves the cooling effect of the first cooling channel 131.

[0041] In a specific embodiment of the present application, as shown in Figures 1 to 4, the second cooling channel 141 includes: a first branch channel 1411, the first branch channel 1411 includes a second direct current section 2 and a second detour section 3, there are multiple second direct current sections 2, the second detour section 3 is used to connect two adjacent second direct current sections 2, each second direct current section 2 includes multiple first branch direct current sections, and the multiple first branch direct current sections all extend along the width direction of the cold plate body 1 and are parallel to each other. In this embodiment, the second branch section cools the battery cells in the width direction of the second cooling zone 14, and the second detour channel cools the battery cells in the length direction of the second cooling zone 14. The second direct current section 2 and the second detour section cooperate to effectively increase the coverage area of ​​the second cooling channel 141, thereby effectively cooling the battery cells in the second cooling zone 14.

[0042] In this specific embodiment, the provision of multiple parallel first branch direct current sections not only increases the cooling area of ​​the second cooling channel 141 in the width direction, but also increases the cooling area of ​​the second cooling channel 141 in the length direction, effectively increasing the overall cooling area of ​​the second cooling channel 141 and improving the cooling effect of the second cooling channel 141.

[0043] In a specific embodiment of the present application, as shown in Figures 1 to 4, the second cooling channel 141 further includes a second branch channel 1412. The first branch channel 1411 and the second branch channel 1412 are symmetrical along a line of symmetry, and the line of symmetry extends along the width direction of the cold plate body 1. In this specific embodiment, the provision of the second branch channel 1412 effectively increases the cooling area of ​​the second cooling channel 141 and improves the cooling effect of the second cooling channel 141. At the same time, the symmetrical arrangement of the first branch channel 1411 and the second branch channel 1412 can ensure that the cooling effect on the corresponding battery cell areas is the same, thereby ensuring that the temperature difference between the corresponding battery cell areas is small.

[0044] In a specific embodiment of the present application, as shown in Figures 1 to 4, in the length direction of the cold plate main body 1, the first branch channel 1411 has a first liquid inlet 4 at one end close to the symmetry line, and has a first liquid outlet 5 at one end away from the symmetry line. The liquid cooling plate 100 also includes: an outgoing liquid flow channel 17, the outgoing liquid flow channel 17 extends along the length direction of the cold plate main body 1, the middle part of the outgoing liquid flow channel 17 is connected to the main liquid outlet channel 12, and the two ends of the outgoing liquid flow channel 17 are respectively connected to the first liquid outlet 5 of the first branch channel 1411 and the first liquid outlet 5 of the second branch channel 1412. In this specific embodiment, the liquid outlet channel 17 is used to gather the coolant in the first branch channel 1411 and the second branch channel 1412, and guide the gathered coolant into the main liquid outlet channel 12, so that the coolant can circulate in the second cooling channel 141, thereby continuously cooling the battery cells in the second cooling zone 14; in addition, the provision of the liquid outlet channel 17 also increases the cooling area of ​​the second cooling channel 141, further improving the cooling effect of the second cooling channel 141.

[0045] For example, as shown in Figures 1 and 3, the second cooling channel 141 is symmetrically designed, and the first branch channel 1411 and the second branch channel 1412 are symmetrically arranged in the second cooling zone 14. The first liquid inlet 4 of the first branch channel 1411 and the second branch channel 1412 are both connected to the first branch liquid inlet channel 16, and the two ends of the liquid outlet channel 17 are respectively connected to the first liquid outlet 5 of the first branch channel 1411 and the first liquid outlet 5 of the second branch channel 1412; when the coolant flows into the second cooling channel 141, the coolant will flow in from the first liquid inlet 4 close to the symmetry line, and flow through the first branch channel 1411 and the second branch channel 1412 toward both sides of the second cooling zone 14, so that the flow path of the coolant is from the middle of the second cooling zone 14 to both sides. In this way, the temperature difference uniformity of the battery cells in the second cooling zone 14 can be improved.

[0046] In a specific embodiment of the present application, as shown in Figures 1 to 4, the liquid cooling plate 100 further includes: a second branch liquid inlet channel 18, one end of the second branch liquid inlet channel 18 is connected to the main liquid inlet channel 11, and the other end extends along the length direction of the cold plate body 1, and in the length direction of the cold plate body 1, the third cooling channel 151 has a second liquid inlet 1511 and a third liquid inlet 1512 on both sides, and a second liquid outlet 1513 in the middle of the third cooling channel 151, the second liquid inlet 1511 is connected to the other end of the second branch liquid inlet channel 18, the third liquid inlet 1512 is connected to the other end of the main liquid inlet channel 11, and the second liquid outlet 1513 is connected to the main liquid outlet channel 12. In this specific embodiment, the second branch liquid inlet channel 18 is used to transport cooling liquid to the second liquid inlet 1511 of the third cooling channel 151; for example, as shown in Figure 1, the second branch liquid inlet channel 18 and the main liquid inlet channel 11 are respectively connected to the second liquid inlet 1511 and the third liquid inlet 1512, and the second liquid outlet 1513 is arranged in the middle of the third cooling channel 151. In this way, when the coolant flows into the third cooling channel 151, the coolant can flow from both sides of the third cooling channel 151 toward the middle of the third cooling channel 151, which can effectively improve the temperature difference uniformity of the battery cells in the second cooling zone 14.

[0047] In a specific embodiment of the present application, as shown in Figures 1 to 4, the third cooling channel 151 includes: a third direct current section 1514 and a third detour section 1515, and a plurality of third direct current sections 1514 are provided. The third detour section 1515 is used to connect two adjacent third direct current sections 1514, and each third direct current section 1514 includes a plurality of second branch direct current sections, and the plurality of second branch direct current sections extend along the width direction of the cold plate body 1 and are parallel to each other; and / or, the cross-sectional area of ​​the first cooling channel 131 is smaller than the cross-sectional area of ​​the second cooling channel 141, and the cross-sectional area of ​​the second cooling channel 141 is smaller than the cross-sectional area of ​​the third cooling channel 151.

[0048] In this specific embodiment, the third branch flow section cools the battery cells in the width direction of the third cooling zone 15, and the third circuitous flow channel cools the battery cells in the length direction of the third cooling zone 15. The third direct flow section 1514 cooperates with the third circuitous flow section to effectively increase the coverage area of ​​the third cooling channel 151, thereby effectively cooling the battery cells in the third cooling zone 15. The provision of multiple parallel second branch direct flow sections not only increases the cooling area of ​​the third cooling channel 151 in the width direction, but also increases the cooling area of ​​the third cooling channel 151 in the length direction, effectively increasing the overall cooling area of ​​the third cooling channel 151 and improving the cooling effect of the third cooling channel 151.

[0049] In this specific embodiment, the first liquid inlet 4 is arranged close to the first cooling channel 131. In this way, the path through which the coolant flows from the first liquid inlet 4 into the first cooling channel 131 is shorter, and the flow resistance encountered by the coolant is smaller. Therefore, the cross-sectional area of ​​the first cooling channel 131 can be set smaller, while the distances between the second cooling channel 141 and the third cooling channel 151 and the first liquid inlet 4 increase successively, the path through which the coolant flows increases successively, and the flow resistance encountered by the coolant increases successively. Therefore, the cross-sectional area of ​​the second cooling channel 141 and the cross-sectional area of ​​the third cooling channel 151 increase successively. In this way, the flow resistance of the coolant can be effectively reduced, so that the coolant can be evenly distributed to the first cooling zone 13, the second cooling zone 14 and the third cooling zone 15, thereby effectively improving the uniformity of the overall temperature difference of the battery pack.

[0050] In some embodiments, such as shown in Figure 1, since the coolant in the second cooling channel 141 flows from the middle of the second cooling zone 14 toward both sides, the temperature of the coolant on both sides of the second cooling zone 14 is higher than the temperature in the middle, and the cooling effect is slightly worse. Since the coolant in the third cooling channel 151 flows from both sides of the third cooling zone 15 toward the middle, the temperature of the coolant on both sides of the third cooling zone 15 is lower than the temperature in the middle, and the cooling effect is good. In this way, the adjacent flow channels between the second cooling zone 14 and the third cooling zone 15 can exchange heat to ensure the uniformity of the temperature difference of the battery cells between the second cooling zone 14 and the third cooling zone 15, thereby further reducing the temperature difference of the battery pack as a whole.

[0051] In one embodiment of the present application, as shown in Figures 1 to 4, the main liquid inlet channel 11 has two main liquid inlet channels 111 and a second main liquid inlet channel 112, and there is only one main liquid outlet channel 12. Along the width direction of the cold plate body 1, the two main liquid inlet channels 11 are respectively arranged on both sides of the cold plate body 1, and the main liquid outlet channel 12 is arranged in the middle of the cold plate body 1, wherein the first cooling channel 131, the second cooling channel 141 and the third cooling channel 151 located between the first main liquid inlet channel 111 and the main liquid outlet channel 12, and the first cooling channel 131, the second cooling channel 141 and the third cooling channel 151 located between the second main liquid inlet channel 112 and the main liquid outlet channel 12 are symmetrical about the central axis of the main liquid outlet channel 12. In this embodiment, the cooling body adopts a symmetrical design, and the first main liquid inlet channel 111 and the second main liquid inlet channel 112 are symmetrically distributed about the central axis. In this way, the cooling effect of the cooling body can be effectively improved, the overall temperature difference uniformity of the battery pack can be improved, and the overall temperature difference of the battery pack can be reduced.

[0052] Other structures and operations of the liquid cooling plate 100 according to the embodiment of the present application are known to those skilled in the art and will not be described in detail here.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0054] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A liquid cooling plate, characterized in that: include: A cold plate body (1), the cold plate body (1) having a main liquid inlet channel (11) and a main liquid outlet channel (12) extending along its length direction, one end of the main liquid inlet channel (11) forming an input port on the cold plate body (1), one end of the main liquid outlet channel (12) forming an output port on the cold plate body (1), a plurality of cooling zones are arranged at intervals along its length direction on the cold plate body (1) between the main liquid inlet channel (11) and the main liquid outlet channel (12), each cooling zone defining a tortuous cooling channel, one end of the cooling channel communicating with the main liquid inlet channel (11), and the other end of the cooling channel communicating with the main liquid outlet channel (12); the tortuous paths of the cooling channels are different.

2. The liquid cooling plate according to claim 1, characterized in that: Also includes: A first cooling zone (13), a second cooling zone (14) and a third cooling zone (15) are arranged on the cold plate body (1) between the main liquid inlet channel (11) and the main liquid outlet channel (12) at intervals along the length direction thereof; a first cooling zone (13) is defined in the first cooling zone (13) as a tortuous first cooling channel (131); one end of the first cooling channel (131) is connected to the main liquid inlet channel (11), and the other end of the first cooling channel (131) is connected to the main liquid outlet channel (12); the second cooling zone (131) is connected to the main liquid inlet channel (11), and the second cooling zone (131) is connected to the main liquid outlet channel (12); A tortuous second cooling channel (141) is defined in the third cooling zone (14), one end of the second cooling channel (141) is connected to the main liquid inlet channel (11), and the other end of the second cooling channel (141) is connected to the main liquid outlet channel (12); a tortuous third cooling channel (151) is defined in the third cooling zone (15), one end of the third cooling channel (151) is connected to the main liquid inlet channel (11), and the other end of the third cooling channel (151) is connected to the main liquid outlet channel (12); wherein, The tortuous path of the first cooling channel (131), the tortuous path of the second cooling channel (141), and the tortuous path of the third cooling channel (151) are all different.

3. The liquid cooling plate according to claim 2, characterized in that: Also includes: A first branch liquid inlet channel (16), one end of the first branch liquid inlet channel (16) is connected to the main liquid inlet channel (11), and the other end extends along the length direction of the cold plate body (1), and the first cooling channel (131) and the second cooling channel (141) are both connected to the main liquid inlet channel (11) through the first branch liquid inlet channel (16).

4. The liquid cooling plate according to claim 2, characterized in that: The first cooling flow channel (131) comprises a first direct flow section (1311) and a first detour flow section (1312); the first direct flow section (1311) extends along the length direction of the cold plate body (1); a plurality of first direct flow sections (1311) are provided; and the first detour flow section (1312) is used to connect two adjacent first direct flow sections (1311).

5. The liquid cooling plate according to claim 2, characterized in that: The second cooling channel (141) comprises: a first branch channel (1411), the first branch channel (1411) comprising a second direct current section (2) and a second detour section (3), the second direct current section (2) being provided with a plurality, the second detour section (3) being used to connect two adjacent second direct current sections (2), each of the second direct current sections (2) comprising a plurality of first branch direct current sections, the plurality of first branch direct current sections extending along the width direction of the cold plate body (1) and being parallel to each other.

6. The liquid cooling plate according to claim 5, characterized in that: The second cooling channel (141) further comprises: a second branch channel (1412); the first branch channel (1411) and the second branch channel (1412) are symmetrical along a symmetry line, and the symmetry line extends along the width direction of the cold plate body (1).

7. The liquid cooling plate according to claim 6, characterized in that: In the length direction of the cold plate body (1), the first branch channel (1411) has a first liquid inlet (4) at one end adjacent to the symmetry line, and has a first liquid outlet (5) at one end away from the symmetry line. The liquid cooling plate further comprises: an outgoing liquid channel (17), the outgoing liquid channel (17) extending along the length direction of the cold plate body (1), the middle part of the outgoing liquid channel (17) being connected to the main liquid outlet channel (12), and the two ends of the outgoing liquid channel (17) being respectively connected to the first liquid outlet (5) of the first branch channel (1411) and the first liquid outlet (5) of the second branch channel (1412).

8. The liquid cooling plate according to claim 2, characterized in that: Also includes: A second branch liquid inlet channel (18), one end of the second branch liquid inlet channel (18) is connected to the main liquid inlet channel (11), and the other end extends along the length direction of the cold plate body (1), and in the length direction of the cold plate body (1), the third cooling channel (151) has a second liquid inlet (1511) and a third liquid inlet (1512) on both sides, and a second liquid outlet (1513) is provided in the middle of the third cooling channel (151), the second liquid inlet (1511) is connected to the other end of the second branch liquid inlet channel (18), the third liquid inlet (1512) is connected to the other end of the main liquid inlet channel (11), and the second liquid outlet (1513) is connected to the main liquid outlet channel (12).

9. The liquid cooling plate according to claim 2, characterized in that: The third cooling flow channel (151) comprises: a third direct current section (1514) and a third detour section (1515), the third direct current section (1514) being provided with a plurality, the third detour section (1515) being used to connect two adjacent third direct current sections (1514), each of the third direct current sections (1514) comprising a plurality of second branch direct current sections, the plurality of second branch direct current sections all extending along the width direction of the cold plate body (1) and being parallel to each other; and / or, The cross-sectional area of ​​the first cooling channel (131) is smaller than the cross-sectional area of ​​the second cooling channel (141), and the cross-sectional area of ​​the second cooling channel (141) is smaller than the cross-sectional area of ​​the third cooling channel (151).

10. The liquid cooling plate according to any one of claims 2 to 9, characterized in that: The main liquid inlet channel (11) has two main liquid inlet channels (111) and two main liquid inlet channels (112), and there is only one main liquid outlet channel (12). Along the width direction of the cold plate body (1), the two main liquid inlet channels (11) are respectively arranged on both sides of the cold plate body (1), and the main liquid outlet channel (12) is arranged in the middle of the cold plate body (1), wherein the first cooling channel (131), the second cooling channel (141) and the third cooling channel (151) located between the first main liquid inlet channel (111) and the main liquid outlet channel (12), and the first cooling channel (131), the second cooling channel (141) and the third cooling channel (151) located between the second main liquid inlet channel (112) and the main liquid outlet channel (12) are symmetrical about the central axis of the main liquid outlet channel (12).

Images