A cooling plate and a battery module capable of achieving efficient cooling and high temperature consistency

Abstract

The application relates to the technical field of batteries, in particular to a cooling plate capable of realizing efficient cooling and high temperature consistency and a battery module, which comprises a cooling assembly; the cooling assembly comprises a first cooling assembly and a second cooling assembly, the first cooling assembly is internally provided with a first cooling flow channel for cooling medium to flow, the second cooling assembly is internally provided with a second cooling flow channel for cooling medium to flow, fins are arranged in the first cooling flow channel and the second cooling flow channel and spaced from each other, the fins divide the first cooling flow channel and the second cooling flow channel into a plurality of first parallel flow channels and a plurality of second parallel flow channels; a plurality of oblique notches are arranged on the fins, the plurality of oblique notches divide the fins into discontinuous multiple sections, so that the temperature of the cooling medium is balanced, uniform cooling of the whole surface is realized, the problems of local overheating or insufficient cooling are avoided, and the temperature consistency is high. Moreover, the contact area between the cooling medium and the fins is increased, and the heat dissipation and cooling efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a cooling plate and a battery module capable of achieving efficient cooling and high temperature consistency. Background Art

[0002] Lithium-ion batteries, with their high energy density, low self-discharge rate, long lifespan, and lack of memory effect, are widely used in applications such as electric vehicles. However, lithium batteries are highly sensitive to temperature. Excessively high battery temperatures can degrade performance and even lead to thermal runaway, while excessively low temperatures can shorten both range and lifespan. Furthermore, large temperature fluctuations can adversely affect battery stability.

[0003] In order to prevent the performance of the battery from being affected by temperature, most liquid cooling solutions are used to provide efficient, stable and lightweight heat dissipation for the battery, which helps to improve the performance and safety of the battery system. For example, the patent application with publication number CN219106291U discloses a battery module and a battery. The first cooling components in the technical solutions disclosed therein all adopt a harmonica tube-like design. The harmonica tube is a representative of a straight flow channel. The straight flow channel first cooling component directly contacts the lithium battery and sets a flow channel inside it, so that the cooling medium flows through the heat source component to absorb heat. Subsequently, the cooling medium with heat flows out of the straight channel first cooling component and enters the cooling system for heat dissipation. The cooled liquid circulates through the straight channel first cooling component again. This cycle continuously removes heat from the lithium battery, reduces the operating temperature of the lithium battery, and improves performance and reliability.

[0004] Although the above technical solution can dissipate heat from the battery to a certain extent, the shape of the harmonica tube is relatively uniform, and the improvement effect of convective heat transfer when the fluid flows inside it is limited; and the straight flow channel may be more likely to form a thermal boundary layer, resulting in increased resistance to convective heat transfer, affecting the heat dissipation effect.

[0005] It should be noted that the information disclosed in this background technology section is only intended to increase understanding of the overall background of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Summary of the Invention

[0006] In order to solve the technical problem of poor heat dissipation effect of the above-mentioned conventional cooling plate, the present invention provides a cooling plate that can achieve efficient cooling and high temperature consistency. The cooling plate includes a first cooling component and a plurality of fins. The first cooling component is provided with a first cooling channel for the flow of cooling medium.

[0007] Several fins are arranged in an interval-spaced manner in the first cooling assembly, and the fins divide the first cooling channel into several first parallel channels; wherein, several oblique cuts are provided on the fins, and the several oblique cuts divide the fins into multiple discontinuous sections.

[0008] Furthermore, the number of the first parallel flow channels is 3-10.

[0009] Furthermore, the ratio of the width D1 of the first parallel flow channel to the thickness d of the fin is 10:1 to 1:1.

[0010] Furthermore, the ratio of the width W of the oblique cut to the width D1 of the first parallel flow channel is between 0.8 and 1.2.

[0011] Furthermore, the first cooling assembly includes a liquid-cooled side plate, a first connecting member and a second connecting member, the first cooling channel is located inside the liquid-cooled side plate, the first connecting member is provided with a first liquid inlet, the second connecting member is provided with a first liquid outlet, the first connecting member is connected to one end of the liquid-cooled side plate, and the second connecting member is connected to the other end of the liquid-cooled side plate.

[0012] Furthermore, a first liquid storage tank is provided in the first connecting member, a second liquid storage tank is provided in the second connecting member, the first liquid injection port is connected to the first cooling channel through the first liquid storage tank, and the first liquid outlet is connected to the first cooling channel through the second liquid storage tank.

[0013] Furthermore, the cooling plate that can achieve efficient cooling and high temperature consistency also includes a second cooling component, in which a second cooling channel for the flow of cooling medium is provided, and the fins are arranged at intervals in the second cooling channel, and the fins divide the second cooling channel into several second parallel channels.

[0014] Furthermore, the second cooling assembly includes a liquid-cooling base plate, a liquid injection portion, and a liquid outlet portion, the second cooling channel is located inside the liquid-cooling base plate, the liquid-cooling base plate has a first end and a second end opposite to each other, the liquid injection portion is located in the middle of the first end, and the liquid outlet portion is located in the middle of the second end;

[0015] The liquid injection portion is provided with a second liquid injection port, and the liquid outlet portion is provided with a second liquid outlet. The second liquid injection port and the second liquid outlet are respectively connected to the second cooling channel.

[0016] Furthermore, the present invention also provides a battery module comprising any one of the above-mentioned cooling plates capable of achieving efficient cooling and high temperature consistency;

[0017] The battery module also includes a cell group. There are two first cooling assemblies, which are respectively arranged on both sides of the cell group. The second cooling assembly is arranged at the bottom of the cell group.

[0018] Furthermore, a heat conducting medium is provided on a side of the first cooling assembly and a side of the second cooling assembly facing the battery cell group.

[0019] Based on the above, the present invention provides a cooling plate and battery module that can achieve efficient cooling and high temperature consistency. Compared with the prior art, by arranging fins in the first cooling channel and the second cooling channel, the fins divide the first cooling channel and the second cooling channel into a plurality of first parallel channels and second parallel channels. The oblique cuts on the fins divide the fins into multiple discontinuous sections. When the cooling medium flows through the oblique cuts, it can produce flow dispersion and mix with the cooling medium in other first parallel channels and second parallel channels to balance the temperature of the cooling medium, thereby achieving uniform cooling of the entire surface, avoiding the problem of local overheating or insufficient cooling, and having high temperature consistency. It also increases the contact area between the cooling medium and the fins, and has high heat dissipation and cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. The positional relationships described in the drawings in the following description are based on the orientation of the components in the drawings unless otherwise specified.

[0021] Figure 1 A schematic structural diagram of a battery module provided in one embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of a cooling plate that can achieve efficient cooling and high temperature consistency, provided by one embodiment of the present invention;

[0023] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0024] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at N in the middle;

[0025] Figure 5 A schematic structural diagram of a second cooling assembly provided in one embodiment of the present invention;

[0026] Figure 6 for Figure 5Schematic diagram of the cross-sectional structure at the middle BB;

[0027] Figure 7 for Figure 6 Schematic diagram of the local enlarged structure at M in the middle.

[0028] Reference numerals:

[0029] 100-Cooling plate for efficient cooling and high temperature consistency of the battery pack 200-10-first cooling assembly

[0030] 20-first cooling channel 30-fin 40-bevel cut

[0031] 50-second cooling assembly 60-second cooling channel 11-liquid cooling side plate

[0032] 12-first connecting piece 13-second connecting piece 14-first liquid injection port

[0033] 15-first liquid outlet 16-first liquid storage tank 17-second liquid storage tank

[0034] 21-first parallel flow channel 51-liquid cooling base plate 52-liquid injection part

[0035] 53-Liquid outlet 54-Second liquid injection port 55-Second liquid outlet

[0036] 61-second parallel flow channel 511-first end 512-second end DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] In the description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the 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 particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, the term "comprising" and any variation thereof means "at least including".

[0039] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a battery module provided by an embodiment of the present application.

[0040] To solve the technical problem of poor heat dissipation effect of the conventional cooling plate, or to achieve at least one of the above advantages or other advantages, an embodiment of the present application provides a battery module. As shown in the figure, the battery module comprises a cooling plate 100 capable of achieving efficient cooling and high temperature consistency and a cell group 200.

[0041] Please refer to Figure 1 Please refer to Figure 2 and Figure 3 As shown in the figure, the cooling plate 100 capable of achieving efficient cooling and high temperature consistency comprises a first cooling assembly 10.

[0042] In specific implementation, the first cooling assembly 10 is internally provided with a first cooling flow channel 20 for the flow of cooling medium. The first cooling flow channel 20 is internally provided with fins 30 arranged at intervals. The fins 30 divide the first cooling flow channel 20 into a plurality of first parallel flow channels 21. When the cooling medium flows through the first cooling flow channel 20, it is divided by the fins 30 and flows into different first parallel flow channels 21 respectively. The fins 30 can increase the contact area between the first cooling flow channel 20 and the cooling medium, thereby improving the heat exchange efficiency and further improving the heat transfer efficiency.

[0043] On the basis of the above, a plurality of oblique cuts 40 are provided on the fin 30. The plurality of oblique cuts 40 divide the fin 30 into multiple discontinuous sections. Specifically, the first cooling channel 20 is S-shaped. The setting direction of the fin 30 is the same as the flow direction of the first cooling channel 20. The S-shaped design makes the flow path of the cooling medium in the first cooling channel 20 tortuous and has a longer flow path, which extends the area and time of heat exchange. At the same time, it can interrupt the development of the boundary layer of the cooling medium, reduce inertia loss, and achieve a smaller fluid pressure loss, so as to achieve the purpose of reducing the thermal boundary, reducing flow resistance, and improving heat dissipation efficiency.

[0044] The bevel cut 40 is provided at the bend of the S-shaped first cooling channel 20, and the bevel cut 40 can realize the connection between the adjacent first parallel channels 21. When the cooling medium flows through the bevel cut 40, the cooling medium produces flow dispersion and mixes with the cooling medium in other first parallel channels 21 to balance the temperature of the cooling medium, thereby achieving uniform cooling of the first cooling component 30 and avoiding the problem of local overheating or insufficient cooling. At the same time, the contact area between the cooling medium and the fin 30 is also increased, further improving the heat transfer effect. Of course, in some other embodiments, in addition to being provided at the bend of the first cooling channel 20, the bevel cut 40 can also be provided at a non-bend or at both a bend and a non-bend, and this case is not limited to this.

[0045] In some preferred embodiments, the first cooling assembly 10 includes a liquid-cooled side plate 11, a first connector 12, and a second connector 13. The first cooling channel 20 is located inside the liquid-cooled side plate 11. One end of the liquid-cooled side plate 11 is connected to the first connector 12, and the other end of the liquid-cooled side plate 11 is connected to the second connector 13. A first liquid inlet 14 is provided on the first connector 12. A first liquid outlet 15 is provided on the second connector 13. When the first connector 12 is connected to the liquid-cooled side plate 11, the first liquid inlet 14 is connected to the first cooling channel 20, and when the second connector 13 is connected to the liquid-cooled side plate 11, the first liquid outlet 15 is connected to the first cooling channel 20. The cooling medium can be injected into the first cooling channel 20 through the first liquid inlet 14 and flow out from the first liquid outlet 15, completing the circulation of the cooling medium.

[0046] Based on the above, a first liquid reservoir 16 is provided in the first connecting member 12. A second liquid reservoir 17 is provided in the second connecting member 13. The first liquid inlet 14 is connected to the first cooling channel 20 through the first liquid reservoir 16. The first liquid outlet 15 is connected to the first cooling channel 20 through the second liquid reservoir 17.

[0047] In a specific implementation, the heights of the first and second liquid reservoirs 16, 17 are equal to the height of the first cooling channel 20. When the cooling medium is injected from the first liquid inlet 14, it flows through the first liquid reservoir 16 and then into the first cooling channel 20. At this time, the cooling medium liquid levels in the first liquid reservoir 16 and the first cooling channel 20 remain consistent. The cooling medium liquid levels in each of the first parallel channels 21 will rise to the same height, thereby ensuring uniformity of the cooling medium flow rate in each of the first parallel channels 21 and improving overall heat dissipation uniformity.

[0048] Preferably, the first liquid inlet 14 and the first liquid outlet 15 are symmetrically arranged. The first liquid storage tank 16 and the second liquid storage tank 17 are symmetrically arranged.

[0049] With respect to the liquid-cooled side plate 11, when a heat dissipation component is installed at the bottom of the battery module, a large temperature difference exists between the top and bottom of the battery module. Therefore, when designing the S-shaped flow path of the first cooling channel 20, the flow should first flow through the top of the battery module to balance the temperature difference between the top and bottom of the battery module and improve the uniformity of overall heat dissipation. When no heat dissipation component is installed at the bottom of the battery module, the heat exchange between the top of the battery module and the air will also cause a temperature difference between the top and bottom. Therefore, when designing the S-shaped flow path of the first cooling channel 20, the flow should first flow through the bottom of the battery module to balance the temperature difference between the top and bottom of the battery module and improve the uniformity of overall heat dissipation.

[0050] In some preferred embodiments, Figure 4 As shown, the bevel cut 40 has an angle α between 25° and 60°. When the cooling medium flows through the bevel cut 40, it can enhance fluid turbulence, break up the boundary layer in the liquid flow, and improve the convective heat transfer coefficient. If the bevel cut 40 has an angle α greater than 60°, the cooling medium will generate local backflow and eddy currents, increasing the flow resistance of the cooling medium, resulting in a decrease in the heat transfer coefficient. This in turn causes local heat retention, reduces local heat transfer efficiency, and creates a temperature difference that negatively impacts the overall battery.

[0051] If the bevel angle α of the bevel cut 40 is less than 25°, it is not conducive to the formation of diversion. At this time, the degree of mixing between the cooling media in different first parallel flow channels 21 is low, the temperature of the cooling media cannot be effectively balanced, and the thermal boundary layer of the cooling media is thicker, resulting in low heat transfer efficiency.

[0052] In some preferred embodiments, the number of first parallel flow channels 21 is 3-10 to balance the heat transfer area and the flow resistance of the cooling medium. When the number of first parallel flow channels 21 is less than 3, the heat transfer area between the cooling medium and the first cooling flow channels 20 is small, and uneven cooling medium flow may occur, leading to local overheating and uneven heat dissipation. When the number of first parallel flow channels 21 is greater than 10, the flow cross-sectional area is too small, resulting in increased flow resistance of the cooling medium, and the flow in the first parallel flow channels 21 may become too small or uneven, which may also lead to local overheating and uneven heat dissipation.

[0053] Of course, in some other embodiments, the number of the first parallel flow channels 21 can be adjusted according to actual application scenarios.

[0054] In some preferred embodiments, the ratio of the width D1 of the first parallel channel 21 to the thickness d of the fin 30 is 10:1 to 1:1. If the ratio is too small, although the contact area between the fin 30 and the cooling medium can be increased, the cross-sectional area through which the cooling medium can flow is too small, resulting in increased flow resistance of the cooling medium. The flow rate in the first parallel channel 21 will be too small or uneven, which not only increases power consumption but may also cause local overheating and uneven heat dissipation. If the ratio is too large, the thickness of the fin 30 is too thin, the heat exchange contact area between the fin 30 and the cooling medium becomes smaller, and the distance between the cooling medium in the center area of ​​the first parallel channel 21 and the fin 30 or the first cooling channel 20 is large, resulting in low heat exchange efficiency and low cooling medium flow rate utilization.

[0055] Furthermore, the ratio of the width W of the bevel cut to the width D1 of the first parallel flow channel 21 is between 0.8 and 1.2. When the ratio is too large, eddy currents and backflows may occur during the exchange and mixing of the cooling medium, leading to localized high-temperature areas and heat accumulation. If the ratio is too small, the flow resistance during the exchange and mixing of the cooling medium may increase, and the flow rate of the cooling medium may be restricted, which is not conducive to heat dissipation.

[0056] Please combine Figure 2 See Figure 5 and Figure 6 In some preferred embodiments, as shown in the figure, the cooling plate 100 that can achieve efficient cooling and high temperature consistency also includes a second cooling component 50. A second cooling channel 60 for the cooling medium to flow is provided in the second cooling component 50. The interior of the second cooling channel 60 is provided with fins 30 that are also arranged at intervals from each other. The fins 30 divide the second cooling channel 60 into a plurality of second parallel channels 61. When the cooling medium flows into the second cooling channel 60, it is divided by the fins 30 and flows through different second parallel channels 61 respectively. The fins 30 can increase the contact area between the second cooling channel 60 and the cooling medium, thereby improving the efficiency of heat exchange and thereby improving the heat transfer efficiency.

[0057] Preferably, the second cooling channel 60 is also S-shaped. The fins 30 are arranged in the same direction as the flow direction of the second cooling channel 60. The S-shaped design makes the cooling medium flow path in the second cooling channel 60 tortuous, providing a longer flow path, extending the area and time of heat exchange, and interrupting the development of the cooling medium boundary layer, reducing inertial losses, and achieving minimal fluid pressure loss, thereby reducing thermal boundaries, lowering flow resistance, and improving heat dissipation efficiency.

[0058] Similarly, if Figure 5 As shown, the ratio of the width D2 of the second parallel flow channel 61 to the thickness d of the fin 30 is 10:1 to 1:1. Of course, in some other embodiments, the width D1 of the first parallel flow channel 21 can be different from the width D2 of the second parallel flow channel 61. Specifically, it can be determined based on the number of turns of the first cooling flow channel 20 and the second cooling flow channel 60, the size of the first cooling assembly 10 and the second cooling assembly 50, and the number of first parallel flow channels 21 and second parallel flow channels 61. This is not limited in this case.

[0059] In a specific embodiment, the second cooling assembly 50 includes a liquid-cooling base plate 51, a liquid injection portion 52, and a liquid outlet portion 53. The second cooling channel 60 is located within the liquid-cooling base plate 51. The liquid-cooling base plate has a first end 511 and a second end 512 opposite each other. The liquid injection portion 52 is located in the middle of the first end 511. The liquid outlet portion 53 is located in the middle of the second end 512.

[0060] In a specific implementation, there are two second cooling channels 60, which are symmetrically arranged on the left and right sides of the interior of the liquid-cooled base plate 51, and the two second cooling channels 20 are both connected to the liquid injection portion 52. The liquid injection portion 52 is provided with a second liquid injection port 54. When the cooling medium is injected into the second cooling channel 60 through the second liquid injection port 54, since the liquid injection portion 52 is located in the middle of the first end 511, the cooling medium is evenly divided into two paths, flowing into the left and right second cooling channels 60 respectively, so as to balance the temperature uniformity of the cooling medium on the left and right sides of the liquid-cooled base plate 11, and avoid the problem of uneven heat dissipation on the left and right sides due to the cooling medium flowing through one side first and then the cooling medium temperature rising and the heat transfer efficiency decreasing when flowing through the other side.

[0061] The liquid outlet portion 53 is provided with a second liquid outlet 55. Two second cooling channels 60 are connected to the second liquid outlets 55 at the second end 512 of the liquid-cooled base plate 11. After completely flowing through the left and right second cooling channels 60, the cooling medium flows out of the liquid-cooled base plate 11 through the second liquid outlets 55, completing the circulation of the cooling medium.

[0062] In some preferred embodiments, two first cooling assemblies 10 are provided, one on each side of the battery cell group 200. Heat is dissipated from the battery cell group 200 on both sides, improving heat dissipation uniformity between the left and right sides of the battery cell group 200. A second cooling assembly 50 is provided at the bottom of the battery cell group 200. Heat is dissipated from the battery cell group 200 at the bottom of the battery cell group 200. The combination of the two first cooling assemblies 10 and the second cooling assembly 50 significantly improves heat dissipation efficiency while ensuring uniform heat dissipation from the battery cell group 200, preventing temperature differences from negatively impacting the battery module.

[0063] Based on the above, the two first cooling assemblies 10 are each provided with a heat-conducting medium (not shown) on the side facing the battery cell group 20. The second cooling assembly 50 is also provided with a heat-conducting medium on the side facing the battery cell group 200. Specifically, the heat-conducting medium can be a plastic material with good thermal conductivity, such as thermal grease, thermal pads, or thermal paste, which can fill the gaps between the first cooling assembly 10, the second cooling assembly 50, and the battery cell group 200, thereby improving heat transfer capacity and efficiency.

[0064] In summary, the present invention provides a cooling plate and battery module that can achieve efficient cooling and high temperature consistency. Compared with the prior art, by arranging fins in the first cooling channel and the second cooling channel, the fins divide the first cooling channel and the second cooling channel into a plurality of first parallel channels and a plurality of second parallel channels. The oblique cuts on the fins divide the fins into multiple discontinuous sections. When the cooling medium flows through the oblique cuts, it can produce flow dispersion and mix with the cooling medium in other first parallel channels and second parallel channels to balance the temperature of the cooling medium, thereby achieving uniform cooling of the entire surface, avoiding the problem of local overheating or insufficient cooling, and having high temperature consistency. It also increases the contact area between the cooling medium and the fins, and has high heat dissipation and cooling efficiency.

[0065] Although the terms such as fin and bevel cut are frequently used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

[0066] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention may be improved in only one or several aspects, without having to simultaneously solve all the technical problems listed in the prior art or background art. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as limiting the claim.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cooling plate, characterized in that: include a first cooling assembly, wherein a first cooling channel is provided in the first cooling assembly for flowing a cooling medium, the first cooling channel comprising a first cooling channel inlet for flowing the cooling medium in, and a first cooling channel outlet for flowing the cooling medium out; a plurality of fins, the plurality of fins being arranged in an interval and disposed in the first cooling assembly, the fins dividing the first cooling channel into a plurality of first parallel channels having head ends and tail ends, the head ends of the first parallel channels being located at a liquid inlet of the first cooling channel, and the tail ends of the first parallel channels being located at a liquid outlet of the first cooling channel; The fins are provided with a plurality of oblique cuts, which divide the fins into a plurality of discontinuous segments, so that two adjacent segments of the discontinuous segments are perpendicular to each other. The oblique cuts are provided at the bends of the first cooling channel, and all fins at each bend are provided with oblique cuts. The oblique cuts are configured so that when the cooling medium in one of the first parallel channels flows through the oblique cuts, the cooling medium is dispersed and mixed with the cooling medium in other first parallel channels. The width W of the oblique cut is equal to the width of the first parallel flow channel. The ratio is between 0.8-1.2, and the bevel angle α of the bevel cut is between 25° and 60°.

2. The cooling plate according to claim 1, wherein: The number of the first parallel flow channels is 3-10.

3. The cooling plate according to claim 1, wherein: The width of the first parallel flow channel The ratio of the thickness of the fin to the thickness d is 10:1 to 1:

1.

4. The cooling plate according to claim 1, wherein: The first cooling assembly includes a liquid-cooled side plate, a first connecting member and a second connecting member. The first cooling channel is located inside the liquid-cooled side plate. The first connecting member is provided with a first liquid inlet, and the second connecting member is provided with a first liquid outlet. The first connecting member is connected to one end of the liquid-cooled side plate, and the second connecting member is connected to the other end of the liquid-cooled side plate.

5. The cooling plate according to claim 4, wherein: A first liquid storage tank is provided in the first connecting member, a second liquid storage tank is provided in the second connecting member, the first liquid filling port is connected to the first cooling channel liquid inlet of the first cooling channel through the first liquid storage tank, and the first liquid outlet is connected to the first cooling channel liquid outlet of the first cooling channel through the second liquid storage tank.

6. The cooling plate according to claim 5, characterized in that: It also includes a second cooling component, in which a second cooling channel for the cooling medium to flow is provided. The fins are arranged at intervals in the second cooling channel, and the fins divide the second cooling channel into a plurality of second parallel channels.

7. The cooling plate according to claim 6, wherein: The second cooling assembly includes a liquid cooling base plate, a liquid injection portion, and a liquid discharge portion. The second cooling channel is located inside the liquid cooling base plate. The liquid cooling base plate has a first end and a second end opposite to each other. The liquid injection portion is located in the middle of the first end, and the liquid discharge portion is located in the middle of the second end. The liquid injection portion is provided with a second liquid injection port, and the liquid outlet portion is provided with a second liquid outlet. The second liquid injection port and the second liquid outlet are respectively connected to the second cooling channel.

8. A battery module, characterized in that: comprising a cooling plate according to any one of claims 6 or 7; The battery module also includes a cell group. There are two first cooling assemblies, which are respectively arranged on both sides of the cell group. The second cooling assembly is arranged at the bottom of the cell group.

9. The battery module according to claim 8, characterized in that: A heat-conducting medium is provided on one side of the first cooling assembly and the second cooling assembly facing the battery cell group.

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