Liquid cooling plate, energy storage device and electric equipment

Abstract

The utility model discloses a liquid cooling plate, an energy storage device and electric equipment, the liquid cooling plate is provided with a liquid inlet and a liquid outlet, the liquid cooling plate comprises a bottom plate, a first side plate and a second side plate, the bottom plate is provided with a first side and a second side which are oppositely arranged along a first direction, and the bottom plate is provided with a first flow channel and a second flow channel. The first side plate is perpendicularly connected to the first side of the bottom plate, a third flow channel is formed in the first side plate, and the third flow channel communicates with the first flow channel to form a first circulating flow channel. The second side plate is perpendicularly connected to the second side of the bottom plate, a fourth flow channel is formed in the second side plate, and the fourth flow channel is communicated with the second flow channel to form a second circulation flow channel. The first circulating flow channel and the second circulating flow channel are configured to enable cooling liquid flowing in from the liquid inlet to flow to the liquid outlet so as to complete one-time inlet and outlet circulation. According to the liquid cooling plate, the energy storage device and the electric equipment, the temperature difference between different battery modules can be reduced, the reliability of the battery modules can be improved, and the service life of the battery modules can be prolonged.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a liquid cooling plate, an energy storage device, and an electrical device. Background Technology

[0002] Energy storage devices typically contain multiple battery modules. During charging and discharging, these modules generate a significant amount of heat, which is usually cooled by liquid cooling plates. However, in related technologies, when cooling multiple battery modules is achieved through the circulation of coolant within the liquid cooling plate, the temperature differences of the coolant between different modules are substantial. This leads to significant temperature variations within the battery modules, impacting their reliability and lifespan. Utility Model Content

[0003] This application discloses a liquid cooling plate, an energy storage device, and an electrical device, which can reduce the temperature difference between different battery modules and improve the reliability and lifespan of the battery modules.

[0004] To achieve the above objectives, in a first aspect, embodiments of this application disclose a liquid cooling plate, wherein the liquid cooling plate is provided with a liquid inlet and a liquid outlet, and the liquid cooling plate comprises:

[0005] A base plate having a first side and a second side disposed opposite to each other along a first direction, and a first flow channel and a second flow channel being provided on the base plate;

[0006] A first side plate, perpendicularly connected to the first side of the base plate, is provided with a third flow channel, which communicates with the first flow channel to form a first circulation flow channel. The first circulation flow channel communicates with the inlet and the outlet.

[0007] The second side plate is vertically connected to the second side of the bottom plate. The second side plate is provided with a fourth flow channel, which is connected to the second flow channel to form a second circulation flow channel. The second circulation flow channel is connected to the liquid inlet and the liquid outlet.

[0008] Both the first circulation channel and the second circulation channel are configured to allow coolant flowing from the inlet to flow to the outlet, thereby completing one inlet-outlet cycle.

[0009] As an optional implementation, in an embodiment of the first aspect of this application, the first flow channel and the second flow channel are arranged side by side along the first direction, and the first flow channel, the second flow channel, the third flow channel, and the fourth flow channel all extend along the second direction;

[0010] The second direction is perpendicular to the first direction.

[0011] The first and second flow channels are arranged side by side along the opposite direction of the two side plates, and the first to fourth flow channels are arranged to extend in a direction perpendicular to the side-by-side direction. This arrangement allows for a more reasonable flow channel layout and maximizes the use of the liquid cooling plate space, while also optimizing the flow path of the coolant, under the premise that two parallel circulation channels are formed on the liquid cooling plate to complete the coolant inlet and outlet circulation.

[0012] As an optional implementation, in an embodiment of the first aspect of this application, the liquid inlet is located at one end of the base plate along the second direction, the base plate is provided with a distribution area communicating with the liquid inlet, the first flow channel has a first distribution port, the second flow channel has a second distribution port, the first distribution port and the second distribution port are both communicating with the distribution area, and the distribution area is configured to distribute the coolant flowing in from the liquid inlet to the first distribution port and the second distribution port.

[0013] The liquid cooling plate of this application embodiment has a distribution area on the base plate, so that the coolant flowing out from the liquid inlet can enter the distribution area to complete the flow guidance, diffusion and distribution, thereby making the liquid flow rate into each coolant channel uniform.

[0014] As an optional implementation, in an embodiment of the first aspect of this application, the distance between the first dispensing port and the liquid inlet is less than the distance between the second dispensing port and the liquid inlet.

[0015] By making the distance between the first distribution port and the liquid inlet smaller than the distance between the second distribution port and the liquid inlet, the arrangement space of the bottom plate can be maximized, and the arrangement area of ​​the flow channels on the bottom plate can be increased.

[0016] As an optional implementation, in an embodiment of the first aspect of this application, the distribution area has a first sidewall that is inclined relative to the first direction, the second flow channel has a second sidewall connected to the first sidewall, and the inclination angle A of the first sidewall relative to the first direction is 5° to 30°.

[0017] By controlling the tilt angle A of the first sidewall relative to the first direction, the flow direction of the coolant flowing out from the inlet into the second flow channel when it passes through the distribution zone can be controlled, which plays a better guiding role for the coolant so that the coolant can smoothly enter the second flow channel.

[0018] As an optional implementation, in an embodiment of the first aspect of this application, the second flow channel has a third sidewall disposed opposite to the second sidewall. The third sidewall includes a first segment and a second segment. The first segment extends along the second direction, and the second segment is connected to one end of the first segment near the distribution area and inclined toward the direction near the liquid inlet.

[0019] By dividing the third sidewall into an interconnected first segment and a second segment, with the second segment inclined toward the inlet, the inclination direction of the second segment is consistent with the direction in which the coolant flowing from the inlet toward the second distribution port. This allows the coolant flowing through the distribution port to flow along the inclination direction, providing a certain guiding effect on the flow of the coolant. This ensures that the flow of coolant into the second distribution port is not obstructed and flows more smoothly.

[0020] As an optional implementation, in an embodiment of the first aspect of this application, the tilt angle of the second segment relative to the first direction is B, where A < B < 90°.

[0021] By controlling the tilt angle B of the second section relative to the first direction, the flow direction of the coolant flowing out from the inlet into the second channel when it passes through the distribution zone can be further controlled. Under the premise that the second section can guide the coolant to enter the second channel more smoothly, the flow rate of the coolant entering the second channel can be guaranteed.

[0022] As an optional implementation, in an embodiment of the first aspect of this application, the second flow channel has a first bottom wall, on which a plurality of first turbulence structures are protruding, at least one of the first turbulence structures is disposed adjacent to the second distribution port, and its projection on the first bottom wall is located on the extension line of the intersection line between the projection of the second segment on the first bottom wall and the first bottom wall.

[0023] This configuration allows the first turbulence structure to act as a flow disruptor, increasing the flow path of the coolant within the second channel. This effectively extends the heat exchange time between the coolant and the battery module, resulting in more thorough cooling and higher heat exchange efficiency. Furthermore, by placing at least one of the first turbulence structures near the second distribution port of the second channel and on the extension line of the second segment, the flow direction of the coolant entering the second channel through the second distribution port can be altered, leading to more uniform coolant flow.

[0024] As an optional implementation, in an embodiment of the first aspect of this application, the first flow channel is provided with a first distribution section, the first distribution section is located at the first distribution port, and the first distribution section is configured to distribute coolant entering the first flow channel and the second flow channel;

[0025] The first distribution section has a first inclined surface disposed opposite to the first sidewall, and the inclination angle of the first inclined surface relative to the first direction is C, where C = A.

[0026] This design, to some extent, extends the flow path into the first distribution port, preventing excessive flow rate or velocity that could damage the liquid cooling plate. Furthermore, the inclined design of the fourth sidewall acts as a guide, further facilitating the uniform distribution of coolant within the distribution area.

[0027] As an optional implementation, in an embodiment of the first aspect of this application, the first distribution unit divides the first distribution port into a first inlet and a second inlet, the first inlet is configured to be close to the second distribution port, the opening size of the second distribution port is D, the opening size of the first inlet is E, and the opening size of the second inlet is F;

[0028] 4mm≤E≤10mm; and / or,

[0029] E+F<D≤28mm; and / or,

[0030] The distance between the first inclined surface and the first sidewall is G, where G > D + E.

[0031] By limiting the opening size of the second distribution port to satisfy this relationship, a more sufficient flow of coolant into the second flow channel can be achieved, reducing the pressure loss difference between the coolant entering the second and first distribution ports, which is more conducive to achieving uniformity of coolant entering the two flow channels. Furthermore, ensuring that the opening sizes of the first and second distribution ports are within a reasonable range controls the impact force generated by the coolant, thereby helping to ensure the reliability of the liquid cooling plate.

[0032] By limiting the opening size F of the first inlet to a reasonable range, the coolant flowing from the first inlet into the first flow channel can be made to flow more smoothly, while the flow rate of the coolant entering the first flow channel can be controlled within a reasonable range, which is more conducive to the flow distribution between the first flow channel and the second flow channel.

[0033] By limiting G to D+E, the flow velocity at each opening can be made nearly uniform, avoiding excessive flow velocity entering the first or second flow channel, which could pose a risk of damage.

[0034] As an optional implementation, in an embodiment of the first aspect of this application, the liquid outlet is disposed on the bottom plate and spaced apart from the liquid inlet along the first direction. The first flow channel includes a first sub-flow channel and a second sub-flow channel arranged side by side along the first direction. The first sub-flow channel has a first distribution port. The second flow channel includes a third sub-flow channel and a fourth sub-flow channel arranged side by side along the first direction. The third sub-flow channel has a second distribution port.

[0035] The first sub-channel and the third sub-channel are arranged adjacent to each other, and the second sub-channel and the fourth sub-channel are located on both sides of the first sub-channel and the third sub-channel, respectively, and are respectively connected to the liquid outlet.

[0036] By setting the outlet on the base plate and spacing it from the inlet along the first direction, both the outlet and the inlet are located on the base plate and on the same side, which simplifies the installation process and reduces the difficulty and cost of maintenance.

[0037] Furthermore, by connecting the second and fourth sub-channels to the same outlet and placing them on either side of the adjacent first and third sub-channels, the arrangement space of the base plate can be fully utilized to optimize the flow path of the coolant, ensuring a more uniform distribution of the coolant in the system, thereby improving the heat exchange efficiency between the liquid cooling plate and the battery module, while ensuring that both the first and second circulation channels form a single cycle of heat exchange.

[0038] As an optional implementation, in an embodiment of the first aspect of this application, the liquid cooling plate further includes at least one reinforcing member, the reinforcing member being disposed at the connection between the first flow channel and the third flow channel, and the reinforcing member having a channel communicating with the first flow channel and the third flow channel; and / or,

[0039] The reinforcing member is located at the junction of the second flow channel and the fourth flow channel, and the reinforcing member has a channel connecting the second flow channel and the fourth flow channel.

[0040] This design provides support for the flow channel walls between the base plate and side plates, preventing deformation and cracking at bends and ensuring channel consistency. Furthermore, the channels within the reinforcing members ensure unobstructed coolant flow after the addition of these reinforcing members.

[0041] Secondly, this application also discloses an energy storage device, including a battery module and a liquid cooling plate as described in the first aspect above, wherein the liquid cooling plate is configured to dissipate heat from the battery module.

[0042] Thirdly, this application also discloses an electrical device including an energy storage device as described in the second aspect above, the energy storage device being used to supply power to the electrical device.

[0043] Compared with the prior art, the beneficial effects of this application are:

[0044] This application provides a liquid cooling plate, an energy storage device, and an electrical device. The liquid cooling plate is configured as a base plate, a first side plate, and a second side plate, with two parallel flow channels shared on each plate. This allows the coolant to flow in two groups: one group flows within a first circulating flow channel formed by the first and third flow channels on the base plate and the first side plate, and the other group flows within a second circulating flow channel formed by the second and fourth flow channels on the base plate and the second side plate. When two battery modules are positioned between the first and second side plates, with the base plate positioned on the bottom surface of the battery modules and the side plates positioned on opposite sides of the battery modules for cooling, the cooling area is increased, thereby improving the cooling efficiency of the battery modules. Furthermore, compared to related technologies where the coolant flows in series from the inlet to the outlet, causing the coolant temperature to gradually decrease along the process, the liquid cooling plate in this application utilizes coolant circulating in two parallel circulation channels to simultaneously cool the bottom and both sides of the battery module. This reduces the temperature difference between the two battery modules, improves the cooling effect on the battery module, and thus helps to improve the reliability and lifespan of the battery module. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of the liquid cooling plate disclosed in this application;

[0047] Figure 2 This is an exploded structural diagram of the liquid cooling plate disclosed in this application;

[0048] Figure 3 This is one of the structural schematic diagrams of the first cold plate disclosed in this application;

[0049] Figure 4 This is the second structural schematic diagram of the first cold plate disclosed in this application;

[0050] Figure 5 This is a schematic diagram of the structure of the reinforcing member disclosed in this application;

[0051] Figure 6 This is a top view of the first cold plate disclosed in this application;

[0052] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0053] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0054] Figure 9 This is a schematic diagram of the energy storage device disclosed in this application;

[0055] Figure 10 This is a schematic diagram of the electrical equipment disclosed in this application.

[0056] Explanation of reference numerals in the attached figures:

[0057] 100. Liquid cooling plate; 100a. Liquid inlet; 100b. Liquid outlet; 100c. Liquid inlet pipe; 100d. Liquid outlet pipe; 100e. First circulation channel; 100f. Second circulation channel; 101. First cold plate; 102. Second cold plate; 10. Base plate; 10a. First side; 10b. Second side; 11. First channel; 11a. First distribution port; 11a1. First inlet; 11a2. Second inlet; 11b. Second turbulence structure; 11c. First distribution port Distribution section; 11c1, First inclined surface; 111, First sub-flow channel; 112, Second sub-flow channel; 12, Second flow channel; 12a, Second distribution port; 12b, Second sidewall; 12c, Third sidewall; 12c1, First segment; 12c2, Second segment; 12d, First turbulence structure; 12e, Second distribution section; 12f, First bottom wall; 121, Third sub-flow channel; 122, Fourth sub-flow channel; 13, Distribution area; 131, First sidewall; 132, Fourth sidewall;

[0058] 20. First side plate; 21. Third flow channel; 211. Fifth sub-flow channel; 212. Sixth sub-flow channel; 30. Second side plate; 31. Fourth flow channel; 311. Seventh sub-flow channel; 312. Eighth sub-flow channel; 40. Reinforcing member; 40a. Channel;

[0059] A. The inclination angle of the first sidewall relative to the first direction; B. The inclination angle of the second segment relative to the first direction; C. The inclination angle of the first inclined surface relative to the first direction;

[0060] D. The opening size of the second distribution port; E. The opening size of the first inlet; F. The opening size of the second inlet; G. The distance between the first inclined surface and the first sidewall;

[0061] 200. Energy storage device; 201. Battery module; 202. Top cover; 203. Housing;

[0062] 300. Electrical equipment; 301. Power conversion device; 302. First user load; 303. Second user load;

[0063] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] In this application, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0066] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0067] Furthermore, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0068] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0069] In energy storage devices of related technologies, liquid cooling plates are generally placed on the bottom surface of the battery module. The coolant circulating in the cooling plate carries away the heat generated by the battery module, maintaining the battery module's temperature within an optimal range and ensuring temperature consistency. However, with the increase in battery energy density, the heat generated by the battery increases, while the limited cooling area and low cooling efficiency can no longer meet the temperature requirements of the battery module.

[0070] To address this, the inventors attempted to design the structure of the liquid cooling plate. Specifically, the liquid cooling plate includes a bottom, a first side plate, and a second side plate. The bottom plate, the first side plate, and the second side plate are respectively provided with interconnected flow channels. Furthermore, an inlet and outlet circulation channel is provided on the bottom plate and the side plate. The coolant flows from the first side plate to the bottom plate and then to the second side plate. By utilizing the first side plate and the second side plate to increase the number of flow channels, the overall cooling area of ​​the liquid cooling plate is increased, thereby improving the cooling efficiency.

[0071] However, the inventors continued their research and found that the above-mentioned liquid cooling plate with its flow channel configuration resulted in a long coolant circulation path. The coolant temperature would gradually decrease along the entire flow channel, which would lead to drastic temperature changes and poor temperature uniformity in the battery module, directly affecting the reliability, lifespan, and performance of the battery module.

[0072] Based on this, this application configures the liquid cooling plate as including a base plate, a first side plate, and a second side plate, and provides two parallel flow channels on the base plate, the first side plate, and the second side plate. That is, the coolant can be divided into two groups: one group flows in the first circulation channel formed by the first and third flow channels on the base plate and the first side plate, and the other group flows in the second circulation channel formed by the second and fourth flow channels on the base plate and the second side plate. When two battery modules are positioned between the first and second side plates, with the base plate positioned on the bottom surface of the battery modules and the two side plates positioned on opposite sides of the battery modules for cooling, the cooling area can be increased, thereby improving the cooling efficiency of the battery modules. Furthermore, it can reduce the temperature difference between the left and right battery modules, improving the cooling effect of the battery modules, thus contributing to improved reliability and lifespan of the battery modules.

[0073] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0074] See Figure 1 This application discloses a liquid cooling plate 100, which has an inlet 100a and an outlet 100b. Coolant enters the interior of the liquid cooling plate 100 through the inlet 100a and flows out through the outlet 100b, thus realizing coolant circulation. Specifically, the inlet 100a can be connected to a cooling source through an inlet pipe 100c, and the outlet 100b can be connected to the cooling source through an outlet pipe 100d.

[0075] In some embodiments, the liquid cooling plate 100 can be applied in the field of energy storage, such as an energy storage device 200. Through efficient heat exchange, the liquid cooling plate 100 can ensure the temperature consistency of the battery module 201 in the energy storage device 200, extend battery life, and reduce maintenance costs. Of course, in some other embodiments, the liquid cooling plate 100 is used for server heat dissipation, effectively reducing the server's operating temperature and improving computing efficiency and stability. The following will illustrate the application of the liquid cooling plate 100 in the energy storage device 200 for heat exchange of the battery module 201.

[0076] In some possible implementations, see [reference] Figures 2 to 4 The liquid cooling plate 100 includes a base plate 10, a first side plate 20, and a second side plate 30. The base plate 10 has a first side 10a and a second side 10b arranged opposite to each other along a first direction X. The base plate 10 is provided with a first flow channel 11 and a second flow channel 12. The first side plate 20 is vertically connected to the first side 10a of the base plate 10. The first side plate 20 is provided with a third flow channel 21, which is connected to the first flow channel 11 to form a first circulation flow channel 100e. The first circulation flow channel 100e is connected to the liquid inlet 100a and the liquid outlet 100b. The second side plate 30 is vertically connected to the second side 10b of the base plate 10. The second side plate 30 is provided with a fourth flow channel 31, which is connected to the second flow channel 12 to form a second circulation flow channel 100f. The second circulation flow channel 100f is connected to the liquid inlet 100a and the liquid outlet 100b. Both the first circulation channel 100e and the second circulation channel 100f are configured to allow the coolant flowing in from the inlet 100a to flow to the outlet 100b, thus completing one inlet-outlet cycle.

[0077] By configuring the liquid cooling plate 100 as a base plate 10, a first side plate 20, and a second side plate 30, and by providing two parallel flow channels on the base plate 10, the first side plate 20, and the second side plate 30 respectively, the coolant can be divided into two groups. One group flows in the first circulation channel 100e formed by the first flow channel 11 and the third flow channel 21 on the base plate 10 and the first side plate 20, and the other group flows in the second circulation channel 100f formed by the second flow channel 12 and the fourth flow channel 31 on the base plate 10 and the second side plate 30. When two battery modules 201 are positioned between the first side plate 20 and the second side plate 30, with the base plate 10 positioned on the bottom surface of the battery module 201 and the two side plates positioned on opposite sides of the battery module 201 for cooling, the cooling area can be increased, thereby improving the cooling efficiency of the battery module 201. Meanwhile, the liquid cooling plate 100 utilizes the coolant circulating in two parallel circulation channels, shortening the path of the coolant circulation once. While cooling the bottom and two sides of the battery module 201 separately, it can reduce the temperature difference between the two battery modules 201, improve the cooling effect of the battery module 201, and thus help improve the reliability and lifespan of the battery module 201.

[0078] Optionally, the base plate 10, the first side plate 20, and the second side plate 30 can be square, such as a square or a rectangle. This embodiment of the application uses a rectangular base plate 10, first side plate 20, and second side plate 30 as an example for illustration. Based on this, the width direction of the base plate 10 can be defined as the first direction X, the length direction of the base plate 10 can be defined as the second direction Y, and the direction in which the first side plate 20 and the second side plate 30 protrude relative to the base plate 10 can be defined as the third direction Z.

[0079] It should be noted that the first side plate 20 being perpendicularly connected to the first side of the base plate 10 and the second side plate 30 being perpendicularly connected to the second side of the base plate 10 can mean that the first side plate 20 and the base plate 10, and the second side plate 30 and the base plate 10 are respectively perpendicular to each other, forming an angle of 90°. However, considering that during the processing, due to the influence of equipment precision, measurement errors, etc., the actual formed product will have processing errors, specifically, the angle between the first side plate 20 and the base plate 10, and the angle between the second side plate 30 and the base plate 10, will have a certain amount of variation under the ideal state of 90°, and this variation is also within the scope of protection of this application.

[0080] Optionally, the liquid cooling plate 100 may include a first cooling plate 101 and a second cooling plate 102, which are stacked together to form a flow channel for coolant to flow between them.

[0081] In one example, flow channels can be provided on both the first cold plate 101 and the second cold plate 102, and the flow channels on the two cold plates together form a flow channel for the flow of coolant.

[0082] In another example, combining Figure 2 A flow channel is formed on the first cold plate 101, and the second cold plate 102 is a flat plate connected above the first cold plate 101 to form a flow channel for the coolant to flow. It can be understood that "above" in "the second cold plate 102 is connected above the first cold plate 101" refers to the direction closer to the battery module 201. Thus, the planar structure of the second cold plate 102 is more conducive to the placement of the battery module 201.

[0083] In this embodiment, the example will be described where a flow channel is formed on the first cold plate 101, but no flow channel is provided on the second cold plate 102. That is, the first cold plate 101 includes the aforementioned base plate 10, first side plate 20, and second side plate 30, which together form an installation space for arranging the battery module 201. To form a closed liquid cooling plate 100, the second plate also includes the same structure as the first cold plate 101, and both have the same shape.

[0084] In some embodiments, the first cold plate 101 and the second cold plate 102 can be integrally formed and then welded together to form the liquid-cooled plate 100. Specifically, the first side plate 20 and the second side plate 30 can be integrally formed with the base plate 10. For example, the first side plate 20 and the second side plate 30 can be bent relative to the base plate 10 to form an arc-shaped structure, avoiding stress concentration at the bend and making the flow channels on the base plate 10 and the flow channels on the side plates transition smoothly, facilitating the flow of coolant. Of course, in some other embodiments, the first side plate 20 and the second side plate 30 can be connected to the base plate 10 by welding or other connection methods.

[0085] Optionally, the first cold plate 101 and the second cold plate 102 are made of the same material, which can be a metal or a non-metallic material with good thermal conductivity, and the specific material is not limited. Preferably, the first cold plate 101 and the second cold plate 102 can be made of aluminum, which can reduce the weight of the liquid cooling plate 100.

[0086] Because the liquid cooling plate 100 at the connection between the base plate 10 and the flow channels of the first side plate 20 and the second side plate 30 is relatively thin, it is prone to extrusion deformation. Therefore, in some possible embodiments, in combination with Figures 3 to 5The liquid cooling plate 100 also includes at least one reinforcing member 40, which is located at the junction of the first flow channel 11 and the third flow channel 21, and has a channel 40a connecting the first flow channel 11 and the third flow channel 21; and / or, the reinforcing member 40 is located at the junction of the second flow channel 12 and the fourth flow channel 31, and has a channel 40a connecting the second flow channel 12 and the fourth flow channel 31. This arrangement provides support for the flow channel walls between the base plate 10 and the side plate, preventing deformation and cracking of the flow channels at bends, and ensuring the consistency of the flow channels. Furthermore, the channel 40a within the reinforcing member 40 ensures the smooth flow of coolant after the reinforcing member 40 is added to the flow channels.

[0087] Optionally, the number of reinforcing members 40 can be two or four, and the specific number can be adjusted according to the number of flow channel connections between the base plate 10 and the first side plate 20, and between the base plate 10 and the second side plate 30. The reinforcing members 40 can be welded to fix the flow channel connections between the base plate 10 and the side plate.

[0088] Furthermore, the reinforcing member 40 can be an arc-shaped structure formed by bending, with its curvature being the same as that of the side plate. This allows the side of the reinforcing member 40 to fit against the bottom wall of the flow channel when it is placed at the bend, thereby providing support for the flow channel between the bottom plate 10 and the two side plates, preventing deformation and breakage, and ensuring the safety of the liquid cooling plate 100.

[0089] For example, the third flow channel 21 has two flow outlets, which are respectively connected to the first sub-flow channel 111 and the second sub-flow channel 112. In this case, a reinforcing member 40 can be provided at the flow channel connection between the first sub-flow channel 111 and the third flow channel 21, and at the flow channel connection between the second sub-flow channel 112 and the third flow channel 21. The fourth flow channel 31 has two flow outlets, which are respectively connected to the third sub-flow channel 121 and the fourth sub-flow channel 122. In this case, a reinforcing member 40 can be provided at the flow channel connection between the third sub-flow channel 121 and the fourth flow channel 31, and at the flow channel connection between the fourth sub-flow channel 122 and the fourth flow channel 31.

[0090] In some possible embodiments, the first flow channel 11 and the second flow channel 12 are arranged side by side along the first direction X, and the first flow channel 11, the second flow channel 12, the third flow channel 21, and the fourth flow channel 31 all extend along the second direction Y. The second direction Y intersects the first direction X.

[0091] The first flow channel 11 and the second flow channel 12 are arranged side by side along the opposite direction of the two side plates (i.e., the first direction X, the width direction of the bottom plate 10), and the first flow channel 11 to the fourth flow channel 31 are arranged to extend along the direction perpendicular to the side-by-side direction (i.e., the second direction X, the length direction of the bottom plate 10). With this arrangement, two parallel circulation channels can be formed on the liquid cooling plate 100 to complete the inlet and outlet circulation of coolant, which can make the flow channel arrangement more reasonable and make greater use of the space of the liquid cooling plate 100, thereby making it more conducive to optimizing the flow path of coolant.

[0092] Optionally, the first circulating flow and the second flow channel 12 can be symmetrically arranged relative to the centerline of the base plate 10, that is, the first flow channel 11 and the second flow channel 12 are symmetrically arranged, and the third flow channel 21 and the fourth flow channel 31 are symmetrically arranged. This is equivalent to dividing the liquid cooling plate 100 into two identical left and right parts, each forming a circulating flow channel. These two circulating flow channels not only have the same path but are also symmetrical. Thus, when two battery modules 201 are provided, the heat exchange effect of the coolant in the two parts can be made consistent, thereby reducing the temperature difference between the two battery modules 201 and effectively ensuring the overall heat exchange effect of the battery module 201.

[0093] It should be noted that the centerline of the base plate 10 can refer to the centerline of the base plate 10 in the first direction X, that is, the centerline extends along the second direction Y. In addition, the arrangement of the flow channels in the areas of the liquid inlet 100a and the liquid outlet 100b may differ, as long as the symmetry of the first flow channel 11, the second flow channel 12, the third flow channel 21 and the fourth flow channel 31 as the main flow channels for the flow of coolant is satisfied.

[0094] See Figures 6 to 8 In some possible embodiments, the liquid inlet 100a is located at one end of the base plate 10 along the second direction Y. The base plate 10 is provided with a distribution area 13 communicating with the liquid inlet 100a. The first flow channel 11 has a first distribution port 11a, and the second flow channel 12 has a second distribution port 12a. Both the first distribution port 11a and the second distribution port 12a are communicating with the distribution area 13. The distribution area 13 is configured to distribute the coolant flowing in from the liquid inlet 100a to the first distribution port 11a and the second distribution port 12a. In this embodiment, the liquid cooling plate 100, by providing a distribution area 13 on the base plate 10, allows the coolant flowing in from the liquid inlet 100a to enter the distribution area 13 for guidance, diffusion, and distribution, thereby making the liquid flow rate entering each cooling flow channel more uniform.

[0095] It should be noted that the distribution area 13 is equivalent to a diversion channel. When the coolant enters the liquid cooling plate 100 from the inlet 100a, it first enters the distribution area 13 and is diverted from the distribution area 13 to the first flow channel 11 and the second flow channel 12. The distribution area 13 is formed in the same way as the first flow channel 11 or the second flow channel 12, but its shape can be different. For example, it can be formed by profile extrusion molding or by stamping molding.

[0096] Furthermore, the term "one end of the base plate 10 along the second direction Y" should be interpreted broadly. "One end of the base plate 10 along the second direction Y" does not only refer to the end of the base plate 10 in its own length direction, but also includes the area on the base plate 10 after the battery module 201 is installed. That is, the liquid inlet 100a is located in the area of ​​the base plate 10 outside the battery module 201, so as to avoid the setting of the liquid inlet 100a from affecting the placement of the battery module 201.

[0097] In some possible implementations, the distance between the first distribution port 11a and the liquid inlet 100a is less than the distance between the second distribution port 12a and the liquid inlet 100a. By making the distance between the first distribution port 11a and the liquid inlet 100a less than the distance between the second distribution port 12a and the liquid inlet 100a, the arrangement space of the base plate 10 can be maximized, and the arrangement area of ​​the flow channels on the base plate 10 can be increased, which is more conducive to the cooling of the coolant.

[0098] In some possible embodiments, the outlet 100b is disposed on the base plate 10 and spaced apart from the inlet 100a along the first direction X. The first flow channel 11 includes a first sub-flow channel 111 and a second sub-flow channel 112 arranged side by side along the first direction X. The first sub-flow channel 111 has a first distribution port 11a. The second flow channel 12 includes a third sub-flow channel 121 and a fourth sub-flow channel 122 arranged side by side along the first direction X. The third sub-flow channel 121 has a second distribution port 12a. The first sub-flow channel 111 and the third sub-flow channel 121 are arranged adjacent to each other. The second sub-flow channel 112 and the fourth sub-flow channel 122 are located on both sides of the first sub-flow channel 111 and the third sub-flow channel 121, respectively, and are respectively connected to the outlet 100b. By setting the outlet 100b on the base plate 10 and spacing it from the inlet 100a along the first direction X, so that both the outlet 100b and the inlet 100a are located on the base plate 10 and on the same side, the installation process can be simplified and the maintenance difficulty and cost can be reduced.

[0099] Furthermore, by connecting the second sub-channel 112 and the fourth sub-channel 122 to the same outlet 100b and placing them on both sides of the adjacent first sub-channel 111 and third sub-channel 121 respectively, the arrangement space of the base plate 10 can be fully utilized to optimize the flow path of the coolant, ensuring that the coolant is more evenly distributed in the system, thereby improving the heat exchange efficiency between the liquid cooling plate 100 and the battery module 201, while ensuring that the first circulation channel 100e and the second circulation channel 100f can both form a single cycle of heat exchange.

[0100] Optionally, the liquid inlet 100a and the liquid outlet 100b can be provided on the second cold plate 102, or the liquid inlet 100a and the liquid outlet 100b can be provided on the first cold plate 101.

[0101] It is understood that the third flow channel 21 located on the first side plate 20 has two flow ports. One end of the first sub-flow channel 111 is connected to the inlet 100a through the distribution area 13, and the other end of the first sub-flow channel 111 is connected to one of the flow ports of the third flow channel 21. One end of the second sub-flow channel 112 is connected to the other flow port of the third flow channel 21, and the other end of the second sub-flow channel 112 is connected to the outlet 100b. Thus, the coolant flowing out of the inlet 100a is distributed by the distribution area 13 and enters the first sub-flow channel 111 through the first distribution port 11a. Then it flows to the third flow channel 21 on the first side plate 20, and then flows from the third flow channel 21 to the second sub-flow channel 112. Finally, it flows back to the outlet 100b through the second sub-flow channel 112, forming one coolant heat exchange cycle.

[0102] Optionally, the third flow channel 21 may include a fifth sub-flow channel 211 and a sixth sub-flow channel 212 arranged side by side. Both the fifth sub-flow channel 211 and the sixth sub-flow channel 212 extend along the second direction Y. One end of the fifth sub-flow channel 211 is connected to the first sub-flow channel 111, and the other end of the fifth sub-flow channel 211 is connected to the sixth sub-flow channel 212. The outlet of the sixth sub-flow channel 212 is connected to the second sub-flow channel 112. In this way, the coolant flowing in from the inlet 100a is distributed by the distribution area 13 and enters the first sub-flow channel 111. The coolant flowing out of the first sub-flow channel 111 then flows to the fifth sub-flow channel 211, then to the sixth sub-flow channel 212, and finally to the second sub-flow channel 112, and returns to the outlet 100b.

[0103] Of course, in other embodiments, the third flow channel 21 may also include four or six equally arranged flow channels, making the flow path of the coolant on the first side plate 20 longer, extending the heat exchange time between the first side plate 20 and the side of the battery module 201, and improving the heat exchange effect. The specific number can be set according to the heat exchange requirements of the battery module 201, and is not limited in this embodiment.

[0104] Correspondingly, the fourth flow channel 31 located on the second side plate 30 has two flow ports. One end of the third sub-flow channel 121 is connected to the inlet 100a through the distribution area 13, and the other end of the third sub-flow channel 121 is connected to one of the flow ports of the fourth flow channel 31. One end of the fourth sub-flow channel 122 is connected to the other flow port of the fourth flow channel 31, and the other end of the fourth sub-flow channel 122 is connected to the outlet 100b. Thus, the coolant flowing out of the inlet 100a is distributed by the distribution area 13 and enters the third sub-flow channel 121 through the second distribution port 12a. Then it flows to the fourth flow channel 31 on the second side plate 30, and then flows from the fourth flow channel 31 to the fourth sub-flow channel 122. Finally, it flows back to the outlet 100b through the fourth sub-flow channel 122, forming another heat exchange cycle of the coolant.

[0105] Optionally, the fourth flow channel 31 may include a seventh sub-flow channel 311 and an eighth sub-flow channel 312 arranged side by side. Both the seventh sub-flow channel 311 and the eighth sub-flow channel 312 extend along the second direction Y. One end of the seventh sub-flow channel 311 is connected to the third sub-flow channel 121, and the other end of the seventh sub-flow channel 311 is connected to the eighth sub-flow channel 312. The outlet of the eighth sub-flow channel 312 is connected to the fourth sub-flow channel 122. In this way, the coolant flowing in from the inlet 100a is distributed by the distribution area 13 and enters the third sub-flow channel 121. The coolant flowing out of the third sub-flow channel 121 flows back to the seventh sub-flow channel 311, then flows to the eighth sub-flow channel 312, and finally flows to the fourth sub-flow channel 122 and returns to the outlet 100b.

[0106] Of course, in other embodiments, the fourth flow channel 31 may also include four or six equally arranged flow channels, making the flow path of the coolant on the second side plate 30 longer, extending the heat exchange time between the second side plate 30 and the side of the battery module 201, and improving the heat exchange effect. The specific number can be set according to the heat exchange requirements of the battery module 201, and is not limited in this embodiment.

[0107] It is worth noting that, regardless of the number of flow channels on the first side plate 20 and the second side plate 30, they must be symmetrically arranged relative to the center line of the bottom plate 10 to effectively achieve consistent heat exchange for the battery module 201.

[0108] When the coolant enters the liquid cooling plate 100 from the inlet 100a, it first enters the distribution zone 13 and is then split from the distribution zone 13 into the first flow channel 11 and the second flow channel 12. The coolant then flows along these channels. Because the distances between the distribution ports and the inlet 100a of the two flow channels are different, the flow rates and velocities of the first flow channel 11 and the second flow channel 12 are different. Therefore, embodiments of this application incorporate a series of designs to regulate the flow rates entering the two flow channels, which are described in detail below.

[0109] Combination Figure 7 In some possible embodiments, the distribution zone 13 has a first sidewall 131 inclined relative to the first direction X, and the second flow channel 12 has a second sidewall 12b connected to the first sidewall 131. The inclination angle A of the first sidewall 131 relative to the first direction X is 5° to 30°. By controlling the inclination angle A of the first sidewall 131 relative to the first direction X, the flow direction of the coolant flowing out from the inlet 100a into the second flow channel 12 when it is diverted through the distribution zone 13 can be controlled, thereby providing better guidance for the coolant and ensuring that it smoothly enters the second flow channel 12.

[0110] If the inclination angle A of the first sidewall 131 relative to the first direction X is less than 5°, the first sidewall 131 is too gentle, and the first inclined surface 11c1 tends to be parallel to the first direction X. This can easily form a flow stagnation area in the corner area of ​​the second flow channel 12, causing the coolant to be unable to be smoothly distributed to the second flow channel 12. If the inclination angle A of the first sidewall 131 relative to the first direction X is greater than 30°, the first sidewall 131 is too steep, resulting in a reduction in the flow channel arrangement area on the base plate 10. This makes it impossible to fully utilize the space of the base plate 10, resulting in insufficient cooling area of ​​the liquid cooling plate 100 and affecting the heat dissipation effect.

[0111] It is understood that the tilt angle A of the first sidewall 131 relative to the first direction X can include any range and any point value within the aforementioned numerical range. Optionally, the tilt angle A of the first sidewall 131 relative to the first direction X can be 5° to 25°, 10° to 20°, or 15° to 30°, etc. For example, A can be 5°, 10°, 20°, or 30°, etc.

[0112] It is understandable that when the distance between the inlet 100a and the first distribution port 11a of the first flow channel 11 is less than the distance between the inlet 100a and the second distribution port 12a of the second flow channel 12, the coolant flowing out of the inlet 100a has a longer path through the distribution area 13 into the second flow channel 12 and flows at an inclined angle. Not only is it impossible to control the flow direction of the coolant, but also, since the extension direction of the second flow channel 12 is perpendicular to the first direction X, the coolant will turn sharply at the second distribution port 12a, resulting in poor flow and increased resistance.

[0113] Therefore, in some possible implementation methods, please refer to [the relevant documentation / reference]. Figure 7 The second flow channel 12 has a third sidewall 12c disposed opposite to the second sidewall 12b. The third sidewall 12c includes a first segment 12c1 and a second segment 12c2. The first segment 12c1 extends along the second direction Y. The second segment 12c2 is connected to the end of the first segment 12c1 near the distribution area 13 and is inclined toward the direction near the liquid inlet 100a.

[0114] It should be noted that the flow channel is formed by the protruding flow channel wall on the base plate 10, and the side wall of the flow channel is the side wall of the flow channel wall used to form the flow channel. As mentioned above, the second side wall 12b is the side wall of the flow channel wall used to form the second flow channel 12 on one side, and the third side wall 12c is the flow channel wall that is disposed opposite to the flow channel wall having the second side wall 12b.

[0115] By dividing the third sidewall 12c into a first segment 12c1 and a second segment 12c2, the second segment 12c2 is inclined toward the inlet 100a, so that the inclination direction of the second segment 12c2 is consistent with the direction of flow of the coolant flowing from the inlet 100a toward the second distribution port 12a. This allows the coolant that has been diverted through the distribution zone 13 to flow along this inclination direction, which has a certain guiding effect on the flow of coolant, so that the flow of coolant into the second distribution port 12a is not obstructed and flows more smoothly.

[0116] In order to better distribute the coolant to the second flow channel 12, in some possible embodiments, the inclination angle of the second segment 12c2 relative to the first direction X is B, where A < B < 90°. By controlling the inclination angle B of the second segment 12c2 relative to the first direction X, the flow direction of the coolant flowing out from the inlet 100a into the second flow channel 12 after being diverted by the distribution zone 13 can be further controlled. Under the premise that the second segment 12c2 can guide the coolant to enter the second flow channel 12 more smoothly, the flow rate of coolant entering the second flow channel 12 can be guaranteed.

[0117] If the inclination angle B of the second segment 12c2 relative to the first direction X is less than A, the inclination angle B is too small, which will result in a longer flow distance for the coolant, causing an increase in the flow resistance of the coolant entering the second flow channel 12. If the inclination angle B of the second segment 12c2 relative to the first direction X is greater than 90°, the inclination angle B is too large, resulting in a smaller flow rate distributed into the second flow channel 12, leading to uneven flow distribution between the first flow channel 11 and the second flow channel 12, thus affecting the cooling effect of the coolant in the first circulation flow channel 100e and the second circulation flow channel 100f by a large difference.

[0118] Optionally, the tilt angle B of the second segment 12c2 relative to the first direction X can satisfy: A < B < 80°, A < B < 60°, or 30° < B < 60°, etc. For example, when A can be 30°, B can be 45°, 60°, or 70°, etc.; when A can be 10°, B can be 15°, 20°, or 30°.

[0119] The coolant entering the second flow channel 12 through the second distribution port 12a will continue to flow along the inclined direction of the second segment 12c2, which will cause uneven flow in the area near the second distribution port 12a in the second flow channel 12 and may result in stagnation areas. Based on this, in some possible embodiments, the second flow channel 12 has a first bottom wall 12f, on which a plurality of first turbulence structures 12d are protruding. At least one first turbulence structure 12d is disposed near the second distribution port 12a, and its projection on the first bottom wall 12f is located on the extension line of the intersection line of the projection of the second segment 12c2 on the first bottom wall 12f and the first bottom wall 12f.

[0120] With this configuration, the first turbulence structure 12d can act as a turbulence breaker, increasing the flow path of the coolant within the second flow channel 12. This effectively extends the heat exchange time between the coolant and the battery module 201, resulting in more thorough cooling of the battery module 201 and achieving higher heat exchange efficiency. Furthermore, by positioning at least one of the first turbulence structures 12d near the second distribution port 12a and on the extension line of the second segment 12c2, the flow direction of the coolant entering the second flow channel 12 through the second distribution port 12a can be altered, resulting in more uniform coolant flow.

[0121] It should be noted that the extension of the second segment 12c2 can refer to: combined with Figure 7 The projection of the second segment 12c2 onto the first bottom wall 12f of the second flow channel 12 will form an intersecting line with the first bottom wall 12f of the second flow channel 12. At least one turbulence structure 12d is provided in the direction of the intersecting line extending into the second flow channel 12. Thus, the extension line of the second segment 12c2 can refer to the extension line of the intersecting line.

[0122] Optionally, multiple first turbulence structures 12d can be uniformly distributed in the second flow channel 12, or multiple first turbulence structures 12d can be non-uniformly distributed in the second flow channel 12. The first turbulence structure 12d is formed by protrusion from the bottom wall of the second flow channel 12, and the protrusion height is approximately the same as that of the flow channel wall of the second flow channel 12. The first turbulence structure 12d can be circular. When the coolant in the second flow channel 12 passes over the surface of the first turbulence structure 12d, the coolant can flow around the first turbulence structure 12d, thereby forming a backflow around the first turbulence structure 12d, prolonging the heat exchange time between the coolant and the battery module 201, thereby improving the heat exchange efficiency.

[0123] In addition, the top surface of the first turbulence structure 12d is a plane. When the liquid cooling plate 100 is formed by stacking two cold plates, the first turbulence structure 12d can also serve as a welding area. In this way, the welding area can be increased and the structural strength of the liquid cooling plate 100 can be improved.

[0124] Correspondingly, the first flow channel 11, the third flow channel 21 and the fourth flow channel 31 are also provided with a second turbulence structure 11b. The structure of the second turbulence structure 11b is the same as that of the first turbulence structure 12d, and the number of the second turbulence structures 11b is the same as the number of the first turbulence structures 12d, which will not be described in detail here.

[0125] In some possible embodiments, a first distribution portion 11c protrudes from the bottom wall of the first flow channel 11. The first distribution portion 11c is located at the first distribution port 11a and is configured to distribute coolant entering the first flow channel 11 and the second flow channel 12. The first distribution portion 11c has a first inclined surface 11c1 disposed opposite to the first side wall 131, and the inclined angle of the first inclined surface 11c1 relative to the first direction X is C, where C = A.

[0126] It should be noted that, in order to ensure a more balanced flow rate of coolant entering the first flow channel 11 and the second flow channel 12, the distribution area 13 also has a fourth sidewall 132 connected to the flow channel wall of the first flow channel 11, provided that the distance between the inlet 100a and the first distribution port 11a of the first flow channel 11 is less than the distance between the inlet 100a and the second distribution port 12a of the second flow channel 12. This fourth sidewall 132 is also arranged at an angle relative to the first direction X, that is, the inlet 100a, the first distribution port 11a, and the second distribution port 12a are staggered in the second direction Y. This arrangement, to a certain extent, extends the flow path into the first distribution port 11a, preventing excessive flow rate or velocity that could damage the liquid cooling plate 100. Furthermore, the angled arrangement of the fourth sidewall 132 can guide the flow, further facilitating the uniform distribution of coolant in the distribution area 13.

[0127] In some possible embodiments, the second flow channel 12 is provided with a second distribution section 12e, which is located at the second distribution port 12a. The second distribution section 12e is configured to distribute the coolant entering the second flow channel 12, thereby enabling the coolant to flow more fully.

[0128] Optionally, the first distribution portion 11c and the second distribution portion 12e can be protruding structures with inclined surfaces, such as circular, elliptical, or triangular structures. Furthermore, the first distribution portion 11c and the second distribution portion 12e can have the same size or different sizes. Preferably, both the second distribution portion 12e and the first distribution portion are triangular structures, and the size of the second distribution portion 12e is smaller than the size of the first distribution portion 11c. Since the first distribution portion 11c not only guides the coolant into the first flow channel 11 but also needs to control the flow direction of the coolant into the second flow channel 12, setting the size of the second distribution portion 12e to be smaller than the size of the first distribution portion 11c makes it easier to control the flow direction of the coolant entering the second flow channel 12.

[0129] In some possible implementations, see [reference] Figure 8 The first distribution section 11c divides the first distribution port 11a into a first inlet 11a1 and a second inlet 11a2. The first inlet 11a1 is positioned close to the second distribution port 12a. The opening size of the second distribution port 12a is D, the opening size of the first inlet 11a1 is E, and the opening size of the second inlet 11a2 is F. The distance between the first inclined surface 11c1 and the first sidewall 131 is G. It can be understood that the coolant flowing out of the inlet 100a is divided into two paths after passing through the distribution area 13. The first path of coolant enters the first flow channel 11 through the second inlet 11a2F. The second path of coolant, after passing through the opening G, is further divided into two paths: one path enters the first flow channel 11 through the first inlet 11a1E, ​​and the other path enters the second flow channel 12 through the second distribution port 12aD, thus achieving flow regulation of the coolant ultimately entering the first flow channel 11 and the second flow channel 12.

[0130] It should be noted that the first distribution section 11c is located at the first distribution port 11a and extends partially into the distribution area 13 to divide the first distribution port 11a into a first inlet 11a1 and a second inlet 11a2, which can increase the number of inlets for coolant to enter the first flow channel 11 and make the coolant flow more fully.

[0131] In some embodiments, the opening size D of the second distribution port 12a satisfies the relationship: E+F<D≤28mm. Since the coolant's path to the second distribution port 12a is longer than that of the first distribution port 11a, the pressure loss difference between the coolant entering the second distribution port 12a and the first distribution port 11a increases. By limiting the opening size of the second distribution port 12a to satisfy this relationship, the coolant flow rate into the second flow channel 12 can be more sufficient, reducing the pressure loss difference between the coolant entering the second distribution port 12a and the first distribution port 11a, which is more conducive to achieving uniformity of coolant entering the two flow channels. Furthermore, ensuring that the opening sizes of the first distribution port 11a and the second distribution port 12a are within a reasonable range controls the impact force generated by the coolant, thereby helping to ensure the reliability of the liquid cooling plate 100.

[0132] If the opening size D of the second distribution port 12a is less than E+F, the flow rate entering the second flow channel 12 will be insufficient, resulting in a large difference in flow rates between the two flow channels, and thus a large difference in cooling temperature. If the opening size D of the second distribution port 12a is greater than 28mm, the opening of the second distribution port 12a is too large, and the flow rate entering the second flow channel 12 will be too large, causing a significant impact on the liquid cooling plate 100, which may form bulges on the liquid cooling plate 100 and affect the reliability of the liquid cooling plate 100.

[0133] In some embodiments, the opening size E of the first inlet 11a1 satisfies the relationship: 4mm ≤ E ≤ 10mm. Optionally, the opening size E of the first inlet 11a1 can satisfy: 5mm ≤ E ≤ 10mm, 6mm ≤ E ≤ 9mm, or 5mm ≤ E ≤ 8mm, etc. For example, the opening size E of the first inlet 11a1 can be 5mm, 6mm, 7mm, or 8mm, etc. By limiting the opening size F of the first inlet 11a1 to a reasonable range, the flow of coolant entering the first flow channel 11 from the first inlet 11a1 can be smoother, while the flow rate of coolant entering the first flow channel 11 can be controlled within a reasonable range, thereby being more conducive to the flow distribution between the first flow channel 11 and the second flow channel 12.

[0134] If the opening size E of the first inlet 11a1 is less than 4 mm, there may be a risk of flow channel blockage. If the opening size E of the first inlet 11a1 is greater than 10 mm, it will result in a larger flow rate entering the first flow channel 11.

[0135] In some embodiments, the distance G between the first inclined surface 11c1 and the first sidewall 131 satisfies the relationship: G > D + E. Since the coolant flowing between the first inclined surface 11c1 and the first sidewall 131 will be diverted again to the second distribution port 12a and the first inlet 11a1 respectively, by limiting G > D + E, the flow velocity of each opening can be made to be approximately the same, avoiding the risk of damage due to excessive flow velocity entering the first flow channel 11 or the second flow channel 12.

[0136] See Figure 9 This application also discloses an energy storage device 200, including a battery module 201 and a liquid cooling plate 100 as described above, wherein the liquid cooling plate 100 is configured to dissipate heat from the battery module 201.

[0137] The battery module 201 is placed in the accommodating space formed by the base plate 10, the first side plate 20, and the second side plate 30. Multiple battery modules 201 may be included, arranged side-by-side. Preferably, two rows of battery modules 201 may be included, with the first battery module 201 positioned near the first side plate 20 and the second battery module 201 positioned near the second side plate 30. This allows for heat exchange between the two battery modules 201 via a single liquid cooling plate 100, improving the heat exchange efficiency of the liquid cooling plate 100 and reducing the temperature difference between the two battery modules 201. Simultaneously, the base plate 10 also provides support for the two battery modules 201. Compared to placing other battery modules 201 outside the accommodating space of the liquid cooling plate 100, no additional support structure is required, reducing the number of components in the energy storage device 200 and simplifying its structure.

[0138] Of course, a liquid cooling plate 100 can exchange heat with a battery module 201. The battery module 201 is placed in the installation space of a liquid cooling plate 100. Thus, multiple surfaces of the battery module 201 can be in contact with the liquid cooling plate 100, increasing the heat exchange area between the battery module 201 and the liquid cooling plate 100, thereby improving the heat exchange efficiency.

[0139] The battery module 201 comprises multiple battery cells, which can be lead-acid batteries, nickel-metal hydride batteries, lithium batteries, lithium iron phosphate batteries, or ternary lithium batteries, etc. The battery cells can be cuboid or cylindrical, etc., and the shape of the battery cells is not limited here.

[0140] The energy storage device 200 may also include an upper cover 202 and a lower housing 203, which are used to encapsulate and protect the battery module 201 and the liquid cooling plate 100.

[0141] This application also provides an electrical device 300, which includes the energy storage device 200 described in the above embodiments, and the energy storage device 200 supplies power to the electrical device 300. For electrical devices including the energy storage device 200 described above, the electrical device 300 as a whole can have better temperature uniformity, improve the stability of the operation of the electrical device 300, and at the same time improve the safety of the use of the electrical device 300.

[0142] Please see Figure 10 , Figure 10The energy storage system provided in this application is a structural diagram of a residential energy storage system, and this application... Figure 10 The embodiments are illustrated using a home energy storage scenario in user-side energy storage as an example. The energy storage device 200 provided in this application embodiment is not limited to the home energy storage scenario.

[0143] For example, the electrical equipment 300 provided in this application embodiment includes an energy storage device 200, an energy conversion device 301 (photovoltaic panel), a first user load 302 (street light), and a second user load 303 (e.g., household appliances such as air conditioners). The energy storage device 200 is a small energy storage box that can be wall-mounted to an outdoor wall. Specifically, the photovoltaic panel can convert solar energy into electrical energy during periods of low electricity prices, and the energy storage device 200 is used to store this electrical energy and supply it to street lights and household appliances during periods of high electricity prices, or to provide power when the power grid is interrupted / out of service.

[0144] The liquid-cooled plate, energy storage device, and electrical equipment disclosed in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the liquid-cooled plate, energy storage device, and electrical equipment of this application and their core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A liquid-cooled plate, characterized in that, The liquid cooling plate is provided with a liquid inlet and a liquid outlet, and the liquid cooling plate includes: A base plate having a first side and a second side disposed opposite to each other along a first direction, and a first flow channel and a second flow channel provided on the base plate; A first side plate, perpendicularly connected to the first side of the base plate, is provided with a third flow channel, which communicates with the first flow channel to form a first circulation flow channel. The first circulation flow channel communicates with the inlet and the outlet. The second side plate is vertically connected to the second side of the bottom plate. The second side plate is provided with a fourth flow channel, which is connected to the second flow channel to form a second circulation flow channel. The second circulation flow channel is connected to the liquid inlet and the liquid outlet. Both the first circulation channel and the second circulation channel are configured to allow coolant flowing from the inlet to flow to the outlet, thereby completing one inlet-outlet cycle.

2. The liquid cooling plate according to claim 1, characterized in that, The first flow channel and the second flow channel are arranged side by side along the first direction, and the first flow channel, the second flow channel, the third flow channel and the fourth flow channel all extend along the second direction; The second direction is perpendicular to the first direction.

3. The liquid cooling plate according to claim 2, characterized in that, The liquid inlet is located at one end of the base plate along the second direction. The base plate is provided with a distribution area communicating with the liquid inlet. The first flow channel has a first distribution port, and the second flow channel has a second distribution port. Both the first distribution port and the second distribution port are communicating with the distribution area. The distribution area is configured to distribute the coolant flowing in from the liquid inlet to the first distribution port and the second distribution port.

4. The liquid cooling plate according to claim 3, characterized in that, The distance between the first distribution port and the liquid inlet is less than the distance between the second distribution port and the liquid inlet.

5. The liquid cooling plate according to claim 4, characterized in that, The distribution area has a first sidewall that is inclined relative to the first direction, and the second flow channel has a second sidewall connected to the first sidewall. The inclination angle A of the first sidewall relative to the first direction is 5° to 30°.

6. The liquid cooling plate according to claim 5, characterized in that, The second flow channel has a third sidewall disposed opposite to the second sidewall. The third sidewall includes a first segment and a second segment. The first segment extends along the second direction, and the second segment is connected to one end of the first segment near the distribution area and is inclined toward the direction near the liquid inlet.

7. The liquid cooling plate according to claim 6, characterized in that, The tilt angle of the second segment relative to the first direction is B, where A < B < 90°.

8. The liquid cooling plate according to claim 6, characterized in that, The second flow channel has a first bottom wall, on which a plurality of first turbulence structures are protruding. At least one of the first turbulence structures is disposed near the second distribution port, and its projection on the first bottom wall is located on the extension line of the intersection line between the projection of the second segment on the first bottom wall and the first bottom wall.

9. The liquid cooling plate according to claim 5, characterized in that, The first flow channel is provided with a first distribution section, which is located at the first distribution port and is configured to distribute coolant entering the first flow channel and the second flow channel. The first distribution section has a first inclined surface disposed opposite to the first sidewall, and the inclination angle of the first inclined surface relative to the first direction is C, where C = A.

10. The liquid cooling plate according to claim 9, characterized in that, The first distribution unit divides the first distribution port into a first inlet and a second inlet. The first inlet is configured to be close to the second distribution port. The opening size of the second distribution port is D, the opening size of the first inlet is E, and the opening size of the second inlet is F. 4mm≤E≤10mm; and / or, E+F<D≤28mm; and / or, The distance between the first inclined surface and the first sidewall is G, where G > D + E.

11. The liquid cooling plate according to claim 3, characterized in that, The outlet is located on the bottom plate and is spaced apart from the inlet along the first direction. The first flow channel includes a first sub-flow channel and a second sub-flow channel arranged side by side along the first direction. The first sub-flow channel has a first distribution port. The second flow channel includes a third sub-flow channel and a fourth sub-flow channel arranged side by side along the first direction. The third sub-flow channel has a second distribution port. The first sub-channel and the third sub-channel are arranged adjacent to each other, and the second sub-channel and the fourth sub-channel are located on both sides of the first sub-channel and the third sub-channel, respectively, and are respectively connected to the liquid outlet.

12. The liquid-cooled plate according to any one of claims 1-11, characterized in that, The liquid cooling plate further includes at least one reinforcing member, which is disposed at the connection between the first flow channel and the third flow channel, and the reinforcing member has a channel communicating with the first flow channel and the third flow channel; and / or, The reinforcing member is located at the junction of the second flow channel and the fourth flow channel, and the reinforcing member has a channel connecting the second flow channel and the fourth flow channel.

13. An energy storage device, characterized in that, It includes a battery module and a liquid cooling plate as described in any one of claims 1-12, wherein the liquid cooling plate is configured to dissipate heat from the battery module.

14. An electrical appliance, characterized in that, It includes the energy storage device as described in claim 13, wherein the energy storage device is used to supply power to the electrical equipment.

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