Liquid Cooling Plate, Power Battery and Electric Vehicle

Abstract

The present invention provides a liquid cooling plate, a power battery and an electric vehicle. The liquid cooling plate includes: a housing having a liquid inlet, a liquid outlet and a receiving cavity, the liquid inlet and the liquid outlet being in communication with the receiving cavity; an inlet section spoiler extending along the flow direction of the coolant and cooperating with the housing to form a first spoiler channel, the liquid inlet end of the first spoiler channel being in communication with the liquid inlet; an outlet section spoiler extending along the flow direction of the coolant and cooperating with the housing to form a second spoiler channel, the liquid outlet end of the second spoiler channel being in communication with the liquid outlet, the liquid inlet end of the second spoiler channel being in communication with the liquid outlet end of the first spoiler channel, the outlet section spoiler including a wavy spoiler section, the locus line of the wavy spoiler section being a wavy curve, and the radius of curvature of the wavy curve gradually decreasing along the flow direction of the coolant. According to the liquid cooling plate of the present invention, the heat exchange capacity of the coolant on the outlet side can be effectively improved, the heat exchange effect can be enhanced, the temperature difference between batteries can be reduced, and the battery temperature consistency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and more particularly, to a liquid cooling plate, a power battery, and an electric vehicle. Background Art

[0002] The power battery is not only related to the driving range of the electric vehicle, but also directly related to the safety of the electric vehicle. The power battery has a relatively sensitive reaction to temperature. If the battery temperature is too high, it will cause the capacity and performance of the battery to decrease, and then the service life will be shortened. Seriously, it may cause spontaneous combustion or even explosion due to battery heat generation. If the temperature is too low, the battery capacity will decrease. The ideal operating temperature of the power battery is between 10°C and 40°C. Traditional natural cooling and forced air cooling cannot meet its usage conditions and requirements. The liquid cooling plate is the most common method currently used in liquid cooling technology.

[0003] The lowest temperature of the battery cells appears on the side of the coolant inlet, and the highest temperature often appears on the side of the coolant outlet. As the coolant moves forward continuously, the temperature of the coolant also rises continuously. The temperature difference between the coolant at the outlet and the surrounding batteries decreases, and the heat transfer coefficient decreases. Therefore, it is easy to cause a large temperature difference between the batteries, affecting the battery temperature consistency. Summary of the Invention

[0004] The main object of the present invention is to provide a liquid cooling plate, a power battery, and an electric vehicle, which can effectively improve the heat transfer capacity of the coolant on the outlet side, enhance the heat transfer effect, reduce the temperature difference between the batteries, and improve the battery temperature consistency.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a liquid cooling plate, comprising:

[0006] A housing having an inlet, an outlet, and a receiving cavity, the inlet and the outlet being in communication with the receiving cavity;

[0007] An inlet section spoiler disposed within the housing, extending along the flow direction of the coolant, and cooperating with the housing to form a first spoiler channel, the inlet end of the first spoiler channel being in communication with the inlet;

[0008] An outlet section spoiler disposed within the housing, extending along the flow direction of the coolant, and cooperating with the housing to form a second spoiler channel, the outlet end of the second spoiler channel being in communication with the outlet, the inlet end of the second spoiler channel being in communication with the outlet end of the first spoiler channel, the outlet section spoiler including a wavy spoiler section, the locus line of the wavy spoiler section being a wavy curve, and the radius of curvature of the wavy curve gradually decreasing along the flow direction of the coolant.

[0009] Further, the liquid cooling plate further includes a partition section. The housing includes a first end wall located at the liquid inlet end of the first flow disturbance channel and a second end wall located at the liquid outlet end of the first flow disturbance channel. The partition section extends from the first end wall towards the second end wall and forms a communication channel with the second end wall. The liquid inlet end of the second flow disturbance channel is communicated with the liquid outlet end of the first flow disturbance channel through the communication channel. The partition section divides the accommodation cavity into a liquid inlet area and a liquid outlet area. The inlet section spoiler is located in the liquid inlet area, and the outlet section spoiler is located in the liquid outlet area.

[0010] Further, the coolant forms vortices in at least part of the wavy flow disturbance section.

[0011] Further, the radius of curvature of the wavy curve satisfies the formula:

[0012] y = ax 3 - bx 2 - cx + d, where the value range of a is 0.05 to 0.06, the value range of b is 0.55 to 0.67, the value range of c is 5 to 6.5, the value range of d is 80 to 90, y is the radius of curvature of the wavy curve, and x is the abscissa of the wavy curve from the starting end to the ending end of the wavy curve along the flowing direction of the coolant.

[0013] Further, a = 0.0559, b = 0.6267, c = 5.828, d = 84.158.

[0014] Further, the radius of curvature of at least part of the wavy curve is less than or equal to 50 mm.

[0015] Further, there are at least three inlet section spoilers, and at least three inlet section spoilers are arranged side by side; and / or, there are at least three outlet section spoilers, and at least three outlet section spoilers are arranged side by side.

[0016] Further, with the inlet as the center in the arrangement direction of the inlet section spoilers, along the direction from the middle to both sides, the distance between the liquid inlet end of the inlet section spoilers and the end wall of the housing decreases; and / or, with the outlet as the center in the arrangement direction of the outlet section spoilers, along the direction from the middle to both sides, the distance between the liquid outlet end of the outlet section spoilers and the end wall of the housing decreases.

[0017] Further, the liquid inlet area and the liquid outlet area are arranged side by side, and the coolant forms a U-shaped flow path when flowing from the liquid inlet area to the liquid outlet area.

[0018] Further, there are at least three inlet section spoilers, and at least three inlet section spoilers are arranged side by side, and there are at least three outlet section spoilers, and at least three outlet section spoilers are arranged side by side;

[0019] Along the direction from the partition segment to both sides, the distance between the inlet segment spoiler and the second end wall decreases, and the distance between the outlet segment spoiler and the second end wall decreases.

[0020] Furthermore, the installation positions of the inlet segment spoiler and the outlet segment spoiler within the housing are symmetric with respect to the partition segment.

[0021] Furthermore, the upper surfaces of the inlet segment spoiler and the outlet segment spoiler are in contact with or connected integrally to the inner surface of the upper side of the housing, and / or the lower surfaces of the inlet segment spoiler and the outlet segment spoiler are in contact with or connected integrally to the inner surface of the lower side of the housing.

[0022] Furthermore, the housing includes an upper cover plate and a lower cover plate. The upper cover plate is disposed on the lower cover plate. The inlet and the outlet are provided on the upper cover plate, and the inlet segment spoiler and the outlet segment spoiler are provided on the lower cover plate.

[0023] Furthermore, the housing is an integrally formed structure; and / or the inlet segment spoiler is a straight plate.

[0024] According to another aspect of the present invention, a power battery is provided, which includes a battery pack and a liquid cooling plate. The liquid cooling plate is the above-mentioned liquid cooling plate, and the liquid cooling plate is arranged at the lower part of the battery pack.

[0025] According to another aspect of the present invention, an electric vehicle is provided, which includes the above-mentioned liquid cooling plate or the above-mentioned power battery.

[0026] Applying the technical solution of the present invention, the liquid cooling plate includes: a housing having an inlet, an outlet and a receiving cavity, the inlet and the outlet being in communication with the receiving cavity; an inlet section spoiler disposed inside the housing, extending along the flow direction of the coolant, and cooperating with the housing to form a first spoiler channel, the liquid inlet end of the first spoiler channel being in communication with the inlet; an outlet section spoiler disposed inside the housing, extending along the flow direction of the coolant, and cooperating with the housing to form a second spoiler channel, the liquid outlet end of the second spoiler channel being in communication with the outlet, the liquid inlet end of the second spoiler channel being in communication with the liquid outlet end of the first spoiler channel, the outlet section spoiler including a wavy spoiler section, the locus line of the wavy spoiler section being a wavy curve, and the radius of curvature of the wavy curve gradually decreasing along the flow direction of the coolant. The liquid cooling plate optimizes the structure of the outlet section spoiler, such that the outlet section spoiler includes a wavy spoiler section, the locus line of the wavy spoiler section being a wavy curve, and the radius of curvature of the wavy curve gradually decreasing along the flow direction of the coolant. This structure enables the coolant to form an increasingly larger perturbation under the influence of the gradually decreasing radius of curvature of the wavy spoiler section when flowing in the area of the second spoiler channel formed by the outlet section spoiler, such that the coolant can more fully form a turbulent flow, increasing the temperature difference between the coolant at the outlet and the surrounding batteries, improving the heat transfer coefficient and heat transfer effect of the coolant in the area where the outlet section spoiler is located, reducing the average temperature of the batteries arranged in the coolant outlet section, while reducing the temperature difference between the batteries and improving the battery temperature consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 shows a perspective structural schematic diagram of the liquid cooling plate according to an embodiment of the present invention;

[0029] Figure 2 shows a structural schematic diagram of the upper cover plate of the liquid cooling plate according to an embodiment of the present invention;

[0030] Figure 3 shows a structural schematic diagram of the lower cover plate of the liquid cooling plate according to an embodiment of the present invention;

[0031] Figure 4 shows a schematic diagram of the coolant flow path of the liquid cooling plate according to an embodiment of the present invention;

[0032] Figure 5 shows a schematic diagram of the assembly structure of the liquid cooling plate and the battery pack according to an embodiment of the present invention; and

[0033] Figure 6 shows a graph of the change in the radius of curvature of the wavy spoiler section of the liquid cooling plate according to an embodiment of the present invention.

[0034] Among them, the above-mentioned drawings include the following reference numerals:

[0035] 1. Upper cover plate; 2. Lower cover plate; 3. Liquid inlet; 4. Liquid outlet; 5. Battery pack; 6. Inlet section spoiler; 7. Outlet section spoiler; 8. Partition section; 9. Wavy spoiler section; 10. First end wall; 11. Second end wall; 12. Communication channel. Detailed implementation manners

[0036] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0037] Referring to Figures 1 to 6 As shown, according to an embodiment of the present invention, the liquid cooling plate includes: a housing having a liquid inlet 3, a liquid outlet 4, and a receiving cavity, the liquid inlet 3 and the liquid outlet 4 are communicated with the receiving cavity; an inlet section spoiler 6 disposed in the housing, extending along the flow direction of the coolant, and cooperating with the housing to form a first spoiler channel, the inlet end of the first spoiler channel is communicated with the liquid inlet 3; an outlet section spoiler 7 disposed in the housing, extending along the flow direction of the coolant, and cooperating with the housing to form a second spoiler channel, the outlet end of the second spoiler channel is communicated with the liquid outlet 4, the inlet end of the second spoiler channel is communicated with the outlet end of the first spoiler channel, the outlet section spoiler 7 includes a wavy spoiler section 9, the locus line of the wavy spoiler section 9 is a wavy curve, and the radius of curvature of the wavy curve gradually decreases along the flow direction of the coolant.

[0038] The structure of the outlet section spoiler 7 of the liquid cooling plate is optimized, so that the outlet section spoiler 7 includes a wavy spoiler section 9, the locus line of the wavy spoiler section 9 is a wavy curve, and the radius of curvature of the wavy curve gradually decreases along the flow direction of the coolant. This structure enables the coolant to form an increasingly large perturbation under the influence of the gradually decreasing radius of curvature of the wavy spoiler section 9 when flowing in the area of the second spoiler channel formed by the outlet section spoiler 7, so that the coolant can more fully form a turbulent flow, increase the temperature difference between the coolant at the liquid outlet 4 and the surrounding batteries, improve the heat transfer coefficient and heat transfer effect of the coolant in the area where the outlet section spoiler 7 is located, reduce the average temperature of the batteries arranged in the coolant outlet section, and at the same time reduce the temperature difference between the batteries and improve the battery temperature consistency.

[0039] In one embodiment, the outlet section spoiler 7 may further include a straight plate diversion section located at the end of the wavy spoiler section 9 to divert the coolant flowing out of the wavy spoiler section 9, so that the coolant flows smoothly and avoids generating excessive noise during the process of flowing out from the liquid outlet 4.

[0040] A liquid inlet pipe can be added at the liquid inlet 3, and a liquid outlet pipe can be added at the liquid outlet 4, thereby further improving the convenience of connecting the liquid cooling plate to the external coolant pipeline.

[0041] In one embodiment, the liquid cooling plate further includes a partition section 8. The housing includes a first end wall 10 at the liquid inlet end of the first turbulent flow channel and a second end wall 11 at the liquid outlet end of the first turbulent flow channel. The partition section 8 extends from the first end wall 10 to the second end wall 11 and forms a communication channel 12 with the second end wall 11. The liquid inlet end of the second turbulent flow channel is communicated with the liquid outlet end of the first turbulent flow channel through the communication channel 12. The partition section 8 divides the accommodation cavity into a liquid inlet area and a liquid outlet area. The inlet section spoiler 6 is located in the liquid inlet area, and the outlet section spoiler 7 is located in the liquid outlet area.

[0042] In this embodiment, the accommodation cavity can be divided into regions by using the partition section 8, so that the accommodation cavity is divided into two regions, one region is the liquid inlet area and the other region is the liquid outlet area. The two regions are separated by the partition section 8 at other positions and are only communicated at the communication channel 12. After the coolant flows out from the liquid outlet end of the liquid inlet area, it reaches the liquid inlet end of the liquid outlet area through the communication channel 12, and then flows along the liquid outlet area. After passing through the outlet section spoiler 7 for turbulent heat exchange, it flows out from the liquid outlet 4 at the liquid outlet end of the liquid outlet area.

[0043] The partition section 8 can divide the accommodation cavity into regions, which can facilitate the flow path setting of the liquid cooling plate. For example, the liquid inlet area and the liquid outlet area can be arranged along a straight line direction, or the flow direction of the coolant in the liquid outlet area can be opposite to the flow direction of the liquid inlet area, so as to form a U-shaped flow path, making the flow path setting of the coolant more flexible.

[0044] In this embodiment, the partition section 8 can divide the liquid cooling plate into multiple processes, an inlet process, an intermediate process, and an outlet process. The process of the liquid cooling plate can also only include an inlet process and an outlet process, and the specific structure can be designed according to needs.

[0045] In one embodiment, vortices are formed in at least part of the wavy turbulent section 9. In this embodiment, by optimizing the structure of the wavy turbulent section 9, the curvature radius of some trajectory lines of the wavy turbulent section 9 is within a set range, so that the coolant flowing through this area can form vortices during the flow process, which can be turned over more fully, enabling the coolant in the central area to flow to the peripheral area more quickly during the flow process and participate in heat exchange. The existence of vortices can make the position transformation of the inner and outer parts of the coolant more intense, and thus enable the entire coolant to conduct heat exchange. Therefore, more sufficient heat exchange can be carried out between the liquid outlet area of the liquid cooling plate and the battery, more effectively reducing the average temperature of the battery arranged in the liquid inlet area, reducing the temperature difference between the batteries, and improving the consistency of the battery temperature.

[0046] Referring to Figure 6 as shown, in one embodiment, the radius of curvature of the wavy curve satisfies the formula:

[0047] y = ax 3 - bx 2 - cx + d, where the value range of a is 0.05 - 0.06, the value range of b is 0.55 - 0.67, the value range of c is 5 - 6.5, the value range of d is 80 - 90, y is the radius of curvature of the wavy curve, and x is the abscissa of the wavy curve from the starting end to the ending end along the flow direction of the coolant.

[0048] In this embodiment, through the above formula, the outlet section spoiler 7 that meets the requirements can be designed. According to this formula, by reasonably setting the length of the outlet section spoiler 7 along the flow direction of the coolant, it can be ensured that vortices are generated in the area after a certain position of the outlet section spoiler 7, guaranteeing the full flow and heat exchange of the coolant and improving the cooling capacity utilization effect of the coolant.

[0049] In one embodiment, a = 0.0559, b = 0.6267, c = 5.828, d = 84.158, so as to improve the accuracy of the above formula, obtain a more accurate wavy curve, and further obtain a better heat exchange effect.

[0050] In one embodiment, the radius of curvature of at least part of the wavy curve is less than or equal to 50 mm. When the radius of curvature is less than or equal to 50 mm, vortices will be generated under the action of viscous friction and inertia of the fluid, and the smaller the radius of curvature, the more intense the vortices.

[0051] In one embodiment, there are at least three inlet section spoilers 6, and at least three inlet section spoilers 6 are arranged side by side. First spoiler channels are formed between the inlet section spoilers 6, between the inlet section spoilers 6 and the housing, and between the inlet section spoilers 6 and the partition section 8. For example, when three inlet section spoilers 6 cooperate with the housing and the partition section 8, four first spoiler channels can be formed.

[0052] In one embodiment, there are at least three outlet section spoilers 7, and at least three outlet section spoilers 7 are arranged side by side. Second spoiler channels are formed between the outlet section spoilers 7, between the outlet section spoilers 7 and the housing, and between the outlet section spoilers 7 and the partition section 8. For example, when three outlet section spoilers 7 cooperate with the housing and the partition section 8, four second spoiler channels can be formed.

[0053] As a preferred embodiment, the number of both the inlet section spoilers 6 and the outlet section spoilers 7 is four.

[0054] When there are at least three spoiler plates 6 in the inlet section and at least three spoiler plates 7 in the outlet section, they can cooperate with the side plates of the housing and the partition section 8 to form multiple spoiler channels. On the one hand, it can improve the shunt uniformity. On the other hand, it can reduce the width of the second spoiler channel formed by the spoiler plate 7 in the outlet section, enabling the internal coolant to flow to the external area more quickly, realizing the exchange of the internal coolant and the external coolant, thereby increasing the internal and external surging frequency during the coolant flow and further improving the heat exchange efficiency between the coolant and the battery.

[0055] In one embodiment, with the liquid inlet 3 as the center in the arrangement direction of the spoiler plates 6 in the inlet section, along the direction from the middle to both sides, the distance between the liquid inlet end of the spoiler plates 6 in the inlet section and the end wall of the housing decreases.

[0056] In this embodiment, since the spoiler plates 6 in the inlet section are arranged with the liquid inlet 3 as the center at the liquid inlet end, the structural arrangement of the spoiler plates 6 in the inlet section can be optimized, so that the structural arrangement of each spoiler plate 6 in the inlet section is adapted to the position of the liquid inlet 3. Furthermore, it is ensured that the distances from the liquid inlet 3 to each spoiler plate 6 in the inlet section are basically the same, enabling the coolant at the liquid inlet 3 to be more evenly distributed into each first spoiler channel.

[0057] In one embodiment, with the liquid outlet 4 as the center in the arrangement direction of the spoiler plates 7 in the outlet section, along the direction from the middle to both sides, the distance between the liquid outlet end of the spoiler plates 7 in the outlet section and the end wall of the housing decreases.

[0058] In this embodiment, since the spoiler plates 7 in the outlet section are arranged with the liquid outlet 4 as the center at the liquid inlet end, the structural arrangement of the spoiler plates 7 in the outlet section can be optimized, so that the structural arrangement of each spoiler plate 7 in the outlet section is adapted to the position of the liquid outlet 4. Furthermore, it is ensured that the distances from the liquid outlet 4 to each spoiler plate 7 in the outlet section are basically the same, and the flow rates of the coolant flowing out from the second spoiler channel to the liquid outlet 4 are basically the same.

[0059] In one embodiment, the liquid inlet area and the liquid outlet area are arranged side by side, and the coolant flows from the liquid inlet area to the liquid outlet area to form a U-shaped flow path. In this embodiment, the liquid inlet area and the liquid outlet area are arranged side by side, and the flow direction of the coolant in the liquid inlet area is opposite to that in the liquid outlet area, thereby being able to increase the flow path of the coolant, increase the heat exchange area of the liquid cooling plate, and improve the heat exchange efficiency of the liquid cooling plate.

[0060] In one embodiment, there are at least three inlet-section spoiler plates 6, and at least three inlet-section spoiler plates 6 are arranged side by side. There are at least three outlet-section spoiler plates 7, and at least three outlet-section spoiler plates 7 are arranged side by side. Along the direction from the partition section 8 to both sides, the distance between the inlet-section spoiler plate 6 and the second end wall 11 decreases, and the distance between the outlet-section spoiler plate 7 and the second end wall 11 decreases, such that the distance between the spoiler plates and the second end wall 11 is arranged in a U shape.

[0061] In this embodiment, at the connection position of the first spoiler channel and the second spoiler channel, a structure with a decreasing width of the connection channel from the partition section 8 to both sides is adopted, which can reasonably design the structures of the inlet-section spoiler plate 6 and the outlet-section spoiler plate 7. By utilizing the flow inertia of the coolant, the coolant can be more evenly distributed into each second spoiler channel, improving the flow uniformity of the coolant.

[0062] In one embodiment, the installation positions of the inlet-section spoiler plate 6 and the outlet-section spoiler plate 7 in the housing are symmetric about the partition section 8. The distances from the ends of the inlet-section spoiler plate 6 and the outlet-section spoiler plate 7 at the corresponding positions to the second end wall 11 are the same. The closer to the partition section 8, the closer the distance between the spoiler plate and the second end wall 11, realizing the flow uniformity of the coolant in the liquid cooling plate.

[0063] In one embodiment, the upper surfaces of the inlet-section spoiler plate 6 and the outlet-section spoiler plate 7 are in contact with or connected integrally with the inner surface of the upper side of the housing.

[0064] In one embodiment, the lower surfaces of the inlet-section spoiler plate 6 and the outlet-section spoiler plate 7 are in contact with or connected integrally with the inner surface of the lower side of the housing.

[0065] In this embodiment, both the upper and lower sides of the inlet-section spoiler plate 6 and the outlet-section spoiler plate 7 are sealed with the housing, which can enable the coolant to flow only within the spoiler channels when entering the first spoiler channel and the second spoiler channel, without forming a lateral flow across the spoiler channels. This can not only improve the flow efficiency and energy utilization rate, but also make the turning efficiency of the coolant inside and outside the second spoiler channel higher and the heat exchange more thorough.

[0066] In one embodiment, the housing includes an upper cover plate 1 and a lower cover plate 2. The upper cover plate 1 is covered on the lower cover plate 2. The liquid inlet 3 and the liquid outlet 4 are arranged on the upper cover plate 1, and the inlet-section spoiler plate 6 and the outlet-section spoiler plate 7 are arranged on the lower cover plate 2.

[0067] Both the inlet-section spoiler plate 6 and the outlet-section spoiler plate 7 on the lower cover plate 2 can be formed by stamping.

[0068] The upper cover plate 1 and the lower cover plate 2 can be hermetically fitted by bonding or fixedly connected by bolt connection.

[0069] In one embodiment, the housing is an integrally formed structure. The housing can be integrally formed by injection molding, or directly formed by powder metallurgy, or integrally formed by 3D printing.

[0070] In one embodiment, the inlet section spoiler 6 is a straight plate, which can play an effective role in guiding the flow.

[0071] According to an embodiment of the present application, the power battery includes a battery pack 5 and a liquid cooling plate, and the liquid cooling plate is the above-mentioned liquid cooling plate, and the liquid cooling plate is arranged below the battery pack 5.

[0072] When the power battery works, the heat dissipation process using the liquid cooling plate is as follows: The coolant flows into the inlet flow of the liquid cooling plate from the liquid inlet, and continuously moves forward along the inlet section spoiler 6. The temperature of the coolant at the inlet is relatively low, and the heat transfer coefficient of the coolant is relatively large. The batteries on the inlet side fully exchange heat with the coolant.

[0073] As the coolant continuously flows forward and continuously exchanges heat with the surrounding batteries, the temperature of the coolant continuously rises. When the coolant reaches the outlet flow, the temperature is relatively high and the temperature difference from the surrounding batteries is relatively small. At this time, the coolant flows into the wavy spoiler section of the outlet flow, and the coolant flows along the wavy spoiler section, increasing the fluid disturbance, generating transverse and longitudinal vortices, improving the convective heat transfer coefficient between the coolant and the liquid cooling plate, effectively improving the heat transfer efficiency on the coolant side, enhancing the heat transfer capacity, reducing the maximum temperature of the whole box of batteries, reducing the maximum temperature difference between the batteries, and improving the battery temperature uniformity.

[0074] According to an embodiment of the present application, the electric vehicle includes the above-mentioned liquid cooling plate or the above-mentioned power battery.

[0075] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0076] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0077] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A liquid cooling plate, characterized in that, Comprising: A housing having a liquid inlet (3), a liquid outlet (4) and a receiving cavity, wherein the liquid inlet (3) and the liquid outlet (4) communicate with the receiving cavity; An inlet section spoiler (6) disposed within the housing, extending along the flow direction of the coolant, and cooperating with the housing to form a first spoiler channel, the liquid inlet end of the first spoiler channel communicating with the liquid inlet (3); An outlet section spoiler (7) disposed within the housing, extending along the flow direction of the coolant, and cooperating with the housing to form a second spoiler channel, the liquid outlet end of the second spoiler channel communicating with the liquid outlet (4), the liquid inlet end of the second spoiler channel communicating with the liquid outlet end of the first spoiler channel, the outlet section spoiler (7) including a wavy spoiler section (9), the locus line of the wavy spoiler section (9) being a wavy curve, the radius of curvature of the wavy curve gradually decreasing along the flow direction of the coolant.

2. The liquid cooling plate according to claim 1, characterized in that, The liquid cooling plate further includes a partition section (8), the housing including a first end wall (10) at the liquid inlet end of the first spoiler channel and a second end wall (11) at the liquid outlet end of the first spoiler channel, the partition section (8) extending from the first end wall (10) towards the second end wall (11) and forming a communication channel (12) with the second end wall (11), the liquid inlet end of the second spoiler channel communicating with the liquid outlet end of the first spoiler channel through the communication channel (12), the partition section (8) dividing the receiving cavity into a liquid inlet area and a liquid outlet area, the inlet section spoiler (6) being located in the liquid inlet area and the outlet section spoiler (7) being located in the liquid outlet area.

3. The liquid cooling plate according to claim 1, characterized in that, The coolant forms vortices in at least a portion of the wavy spoiler section (9).

4. The liquid cooling plate according to claim 3, characterized in that, The radius of curvature of the wavy curve satisfies the formula: y = ax 3 - bx 2 - cx + d, where the value range of a is 0.05 to 0.06, the value range of b is 0.55 to 0.67, the value range of c is 5 to 6.5, the value range of d is 80 to 90, y is the radius of curvature of the wavy curve, and x is the abscissa of the wavy curve from the starting end to the ending end of the wavy curve along the flow direction of the coolant.

5. The liquid cooling plate according to claim 4, characterized in that, a = 0.0559, b = 0.6267, c = 5.828, d = 84.

158.

6. The liquid cooling plate according to claim 3, characterized in that, The radius of curvature of at least a portion of the wavy curve is less than or equal to 50 mm.

7. The liquid cooling plate according to any one of claims 1 to 6, characterized in that, The inlet section spoiler (6) is at least three, and at least three of the inlet section spoilers (6) are arranged side by side; and / or, the outlet section spoiler (7) is at least three, and at least three of the outlet section spoilers (7) are arranged side by side.

8. The liquid cooling plate according to claim 7, characterized in that, Centering on the liquid inlet (3) in the arrangement direction of the inlet section spoiler (6), along the direction from the middle to both sides, the distance between the liquid inlet end of the inlet section spoiler (6) and the end wall of the housing decreases; and / or, centering on the liquid outlet (4) in the arrangement direction of the outlet section spoiler (7), along the direction from the middle to both sides, the distance between the liquid outlet end of the outlet section spoiler (7) and the end wall of the housing decreases.

9. The liquid cooling plate according to claim 2, characterized in that, The liquid inlet area and the liquid outlet area are arranged side by side, and the coolant flows from the liquid inlet area to the liquid outlet area to form a U-shaped flow path.

10. The liquid cooling plate according to claim 9, characterized in that, The inlet section spoiler (6) is at least three, and at least three of the inlet section spoilers (6) are arranged side by side, the outlet section spoiler (7) is at least three, and at least three of the outlet section spoilers (7) are arranged side by side; Along the direction from the separation section (8) to both sides, the distance between the inlet section spoiler (6) and the second end wall (11) decreases, and the distance between the outlet section spoiler (7) and the second end wall (11) decreases.

11. The liquid cooling plate according to claim 9, characterized in that, The installation positions of the inlet section spoiler (6) and the outlet section spoiler (7) in the housing are symmetric about the separation section (8).

12. The liquid cooling plate according to any one of claims 1 to 6, characterized in that, The upper surfaces of the inlet section spoiler (6) and the outlet section spoiler (7) are in contact with or integrally connected to the inner surface of the upper side of the housing, and / or the lower surfaces of the inlet section spoiler (6) and the outlet section spoiler (7) are in contact with or integrally connected to the inner surface of the lower side of the housing.

13. The liquid cooling plate according to any one of claims 1 to 6, characterized in that, The housing includes an upper cover plate (1) and a lower cover plate (2). The upper cover plate (1) is disposed on the lower cover plate (2). The liquid inlet (3) and the liquid outlet (4) are provided on the upper cover plate (1), and the inlet section spoiler (6) and the outlet section spoiler (7) are provided on the lower cover plate (2).

14. The liquid cooling plate according to any one of claims 1 to 6, characterized in that, The housing is an integrally formed structure; and / or the inlet section spoiler (6) is a straight plate.

15. A power battery, comprising a battery pack (5) and a liquid cooling plate, characterized in that, The liquid cooling plate is the liquid cooling plate according to any one of claims 1 to 14, and the liquid cooling plate is arranged at the lower part of the battery pack (5).

16. An electric vehicle, characterized in that, It includes the liquid cooling plate according to any one of claims 1 to 14 or the power battery according to claim 15.

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