Liquid cooling system and power battery

Abstract

The invention relates to the technical field of lithium ion batteries, in particular to a liquid cooling system and a power battery. The liquid cooling system comprises a liquid cooling plate, one side of the liquid cooling plate in the thickness direction is used for facing the battery module and being attached to the battery module, the liquid cooling plate is of a hollow structure with an inner cavity, and the inner cavity of the liquid cooling plate is used for circulating cooling liquid, so that heat generated when the battery module works is absorbed through the cooling liquid, and heat exchange and cooling of the battery module are achieved. Meanwhile, an air duct for ventilation is formed in the inner cavity of the liquid cooling plate, so that air flow circulating in the air duct can exchange heat with the cooling liquid in the liquid cooling plate, heat of the cooling liquid is absorbed, cooling of the cooling liquid is realized, and the situation that the cooling liquid in the liquid cooling plate absorbs the heat of the battery module, the temperature is increased, and the heat absorption capacity is reduced is avoided; and the cooling efficiency of the liquid cooling plate on the battery module can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium-ion batteries, and in particular to a liquid cooling system and a power battery. Background Art

[0002] With the rapid development of electric vehicles, the performance and safety of power batteries, as one of their core components, have received widespread attention. Since power batteries generate a lot of heat during operation, excessively high temperatures can cause battery performance degradation and even cause safety hazards, so an effective heat dissipation system is essential for the stable operation of power batteries.

[0003] At present, liquid cooling is one of the commonly used heat dissipation methods for power batteries. Liquid cooling is to remove the heat generated by the battery by passing a coolant (such as water or a special coolant) through a liquid cooling plate that is in close contact with the battery. This heat dissipation method has a simple structure and high heat dissipation efficiency, but it has a significant limitation, that is, as the coolant continues to absorb the heat generated by the battery, the temperature will gradually rise, causing its heat absorption capacity to decrease, thereby affecting the heat dissipation of the battery by the liquid cooling plate. Summary of the invention

[0004] The object of the present invention is to provide a liquid cooling system and a power battery, so as to alleviate to a certain extent the problem of decreased heat absorption capacity of the liquid cooling plate due to increased temperature of the internal coolant.

[0005] The present invention provides a liquid cooling system, comprising a liquid cooling plate; The first panel on one side of the liquid cooling plate in the thickness direction is used to face the battery module and be attached to the battery module. The liquid cooling plate is a hollow structure with an inner cavity. The inner cavity of the liquid cooling plate is used for circulating cooling liquid, and an air duct for ventilation is provided in the inner cavity of the liquid cooling plate.

[0006] Further, the liquid cooling system includes a heat dissipation structure; The heat dissipation structure is arranged in the inner cavity of the liquid cooling plate, and the air duct is formed inside the heat dissipation structure; An air inlet pipe connected to the air duct for air intake into the air duct is provided at one end of the heat dissipation structure, and an air outlet pipe connected to the air duct for air outlet from the air duct is provided at the other end of the heat dissipation structure; A second panel is formed on a side of the liquid cooling plate away from the battery module, and through holes are provided at positions of the second panel opposite to the air inlet pipe and the air outlet pipe so that the air inlet pipe and the air outlet pipe can extend out of the liquid cooling plate.

[0007] Furthermore, outer side walls of the air inlet pipe and the air outlet pipe are both formed with external threaded connection parts, and are threaded with matching fasteners, and the fasteners are sealed against the outer plate surface of the second panel.

[0008] Furthermore, the liquid cooling plate has a first direction and a second direction perpendicular to its thickness direction, and the first direction and the second direction are perpendicular; The length direction of the heat dissipation structure is arranged along the first direction, and the heat dissipation structure is a plurality of heat dissipation structures arranged side by side and spaced apart along the second direction.

[0009] Further, the heat dissipation structure is supported between the first panel and the second panel; The liquid cooling plate includes a peripheral frame disposed between the first panel and the second panel, and at least one end of the heat dissipation structure in the length direction does not contact the peripheral frame.

[0010] Furthermore, two opposite surfaces of the heat dissipation structure in the second direction are both arc surfaces; And / or, a protrusion protruding toward the inside of the liquid cooling plate is pressed and formed on the plate body of at least one of the first panel and the second panel.

[0011] Furthermore, a plurality of the air ducts spaced side by side are formed inside the heat dissipation structure along the thickness direction of the liquid cooling plate; The air inlet pipe and the air outlet pipe both extend into the heat dissipation structure, and openings are provided at the position of the air inlet pipe opposite to each air duct and at the position of the air outlet pipe opposite to each air duct.

[0012] Furthermore, the liquid cooling system further comprises an air guide cover, wherein the air guide cover is arranged on the outer surface of the second panel, and the air inlet pipes of the plurality of heat dissipation structural components are all located in the air guide cover; The side plate on one side of the air guide cover is a detachable filter plate; The pipe opening sleeve of the air outlet pipe is provided with a filter mesh cap.

[0013] Furthermore, the liquid cooling system further comprises a hollow partition, the inner cavity of the partition is used for circulating the cooling liquid; The battery module includes a plurality of rows of battery packs arranged side by side along a first direction. The partition is vertically arranged on the first panel, and the partition is arranged between any two adjacent rows of battery packs.

[0014] Further, the partition includes a side wall facing the liquid cooling plate, and the side wall is provided with connecting pipes on two opposite sides along the second direction, and the connecting pipes are connected to the inner cavity of the partition; A first liquid outlet is provided at a position of the first panel opposite to each of the connecting pipes; The adapter is provided with a first connecting member, and the first liquid outlet is provided with a second connecting member. The first connecting member and the second connecting member can be adaptively connected to connect the adapter to the corresponding first liquid outlet in communication.

[0015] Further, the liquid inlet of the liquid cooling plate is provided on the peripheral side frame of the liquid cooling plate; A second liquid outlet is provided on one side of each partition away from the liquid cooling plate. The liquid cooling system further includes a liquid discharge main pipe, and the liquid outlets of multiple partitions are all communicated with the liquid discharge main pipe.

[0016] The present invention also provides a power battery including the liquid cooling system according to any one of the above.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The liquid cooling system provided by the present invention includes a liquid cooling plate. One side in the thickness direction of the liquid cooling plate is used to face the battery module and be attached to the battery module so as to be able to exchange heat with the battery module; the liquid cooling plate is a hollow structure with an inner cavity, and the inner cavity of the liquid cooling plate is used for circulating a coolant (such as water or other refrigerants), so that the heat generated when the battery module works can be absorbed by the circulating coolant and taken away to achieve heat exchange and cooling of the battery module.

[0018] Meanwhile, an air duct for ventilation is formed in the inner cavity of the liquid cooling plate, such as allowing air to circulate in the air duct; the airflow circulating in the air duct can exchange heat with the coolant in the liquid cooling plate to absorb the heat of the coolant and achieve cooling of the coolant, thereby preventing the coolant in the liquid cooling plate from increasing in temperature due to absorbing the heat of the battery module and resulting in a decrease in heat absorption capacity, and further being able to effectively improve the cooling efficiency of the liquid cooling plate for the battery module.

[0019] The present invention also provides a power battery including the liquid cooling system, so the power battery also has the beneficial effects of the liquid cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the liquid cooling system provided by an embodiment of the present invention; Figure 2 It is a schematic cross-sectional view of the liquid cooling plate provided by an embodiment of the present invention; Figure 3Schematic diagram of the heat dissipation structural member provided by the embodiment of the present invention; Figure 4 is Figure 2 enlarged view of position A in Figure 5 is Figure 2 enlarged view of position B in

[0022] Reference numerals: 1 - liquid cooling plate, 11 - first panel, 12 - second panel, 13 - liquid inlet, 14 - first liquid outlet, 2 - partition, 3 - air guide cover, 31 - filter hole plate, 4 - liquid discharge main pipe, 5 - heat dissipation structural member, 51 - air duct, 52 - air inlet pipe, 53 - air outlet pipe, 54 - fastener, 55 - filter net cap; a - first direction, b - second direction. Detailed implementation manners

[0023] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0024] Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention.

[0025] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The following refers to Figures 1 to 5 Describe the liquid cooling system and power battery according to some embodiments of the present application.

[0029] The present application provides a liquid cooling system for a power battery to dissipate heat from the battery modules of the power battery.

[0030] As Figure 1 shown, the liquid cooling system includes a liquid cooling plate 1. The first panel 11 on one side in the thickness direction of the liquid cooling plate 1 is used to face the battery module and adhere to the battery module so as to be able to exchange heat with the battery module; the liquid cooling plate 1 is a hollow structure with an inner cavity. The inner cavity of the liquid cooling plate 1 is used for circulating a coolant (such as water or other refrigerants), so that the heat generated when the battery module works can be absorbed by the circulating coolant and taken away to realize heat exchange and temperature reduction of the battery module.

[0031] At the same time, as combined with Figure 2 and Figure 3 shown, an air duct 51 for ventilation is formed in the inner cavity of the liquid cooling plate 1, such as allowing air to circulate in the air duct 51; the airflow circulating in the air duct 51 can exchange heat with the coolant in the liquid cooling plate 1 to absorb the heat of the coolant and realize the temperature reduction of the coolant, thereby preventing the coolant in the liquid cooling plate 1 from increasing in temperature due to absorbing the heat of the battery module and resulting in a decrease in heat absorption capacity, and further being able to effectively improve the temperature reduction efficiency of the liquid cooling plate 1 for the battery module.

[0032] In an embodiment of the present application, preferably, as Figures 2 to 5 shown, the liquid cooling system includes a heat dissipation structure 5. The heat dissipation structure 5 is arranged in the inner cavity of the liquid cooling plate 1. The above-mentioned air duct 51 is formed inside the heat dissipation structure 5, and an air inlet pipe 52 communicating with the air duct 51 is provided at one end of the heat dissipation structure 5 to realize the air inlet of the air duct 51 through the air inlet pipe 52, and an air outlet pipe 53 communicating with the air duct 51 is provided at the other end of the heat dissipation structure 5 to realize the air outlet of the air duct 51 through the air outlet pipe 53.

[0033] On one side of the liquid cooling plate 1 facing away from the battery module, a second panel 12 is formed. The ends of the air inlet pipe 52 and the air outlet pipe 53 far from the heat dissipation structure 5 both extend towards the direction of the second panel 12, and through holes are provided at the positions of the second panel 12 opposite to the air inlet pipe 52 and the air outlet pipe 53 respectively, so that the air inlet pipe 52 and the air outlet pipe 53 can extend out of the liquid cooling plate 1 through the corresponding through holes. Thus, it is convenient to connect to the external air supply through the air inlet pipe 52 to ventilate the air duct 51, and the air flow in the air duct 51 can take away the heat from the liquid cooling plate 1 through the air outlet pipe 53 after exchanging heat with the coolant.

[0034] In this embodiment, preferably, the heat dissipation structure 5 is fixedly installed in the liquid cooling plate 1 through a fastener 54; specifically, as Figure 4 and Figure 5 shown, external thread connection parts are formed on the outer side walls of the air inlet pipe 52 and the air outlet pipe 53 and are screwed with matching fasteners 54. By screwing the fasteners 54, the fasteners 54 can be tightly abutted against the outer plate surface of the second panel 12, so as to fasten the heat dissipation structure 5 in the inner cavity of the liquid cooling plate 1 by using the fasteners 54.

[0035] Meanwhile, a sealing gasket is provided between the fastener 54 and the second panel 12, and the fastener 54 is hermetically abutted against the second panel 12 through the sealing gasket. Thus, the through hole on the second panel 12 for the air inlet pipe 52 to extend out can be sealed by the fastener 54 and the sealing gasket on the air inlet pipe 52, and the through hole on the second panel 12 for the air outlet pipe 53 to extend out can be sealed by the fastener 54 and the sealing gasket on the air outlet pipe 53, thereby avoiding the liquid leakage of the liquid cooling plate 1.

[0036] In an embodiment of the present application, preferably, the liquid cooling plate 1 has a first direction a and a second direction b perpendicular to its own thickness direction, and the first direction a and the second direction b are perpendicular to each other; the length direction of the heat dissipation structure 5 is arranged along the first direction a, and at the same time, the number of the heat dissipation structures 5 is multiple, and the multiple heat dissipation structures 5 are arranged side by side and spaced along the second direction b. Thus, the coolant in the liquid cooling plate 1 can be evenly cooled by the air ducts 51 of the multiple heat dissipation structures 5, and the cooling efficiency can be improved.

[0037] In this embodiment, preferably, one side of the heat dissipation structure 5 along the thickness direction of the liquid cooling plate 1 abuts against the first panel 11, and the other side of the heat dissipation structure 5 along the thickness direction of the liquid cooling plate 1 abuts against the second panel 12. Thus, the heat dissipation structure 5 is supported between the first panel 11 and the second panel 12 to enhance the structural strength of the liquid cooling plate 1, avoid the collapse of the liquid cooling plate 1 from affecting the smooth flow of the coolant, and enable the liquid cooling plate 1 to stably exchange heat and cool the battery module.

[0038] Meanwhile, the liquid cooling plate 1 includes a peripheral side frame disposed between the first panel 11 and the second panel 12. The length of the heat dissipation structural member 5 in the first direction a is less than the length of the inner cavity of the liquid cooling plate 1 in the first direction a, so that at least one end of the opposite ends of the heat dissipation structural member 5 in the first direction a is not in contact with the peripheral side frame of the liquid cooling plate 1, thereby preventing the heat dissipation structural member 5 from affecting the smooth flow of the coolant in the inner cavity of the liquid cooling plate 1.

[0039] In an embodiment of the present application, preferably, as Figure 3 shown, the opposite two surfaces of the heat dissipation structural member 5 in the second direction b are both arc surfaces, so as to increase the contact area between the heat dissipation structural member 5 and the coolant in the liquid cooling plate 1 to a certain extent, thereby improving the cooling efficiency of the coolant.

[0040] In an embodiment of the present application, preferably, as Figure 2 shown, a convex portion protruding toward the inside of the liquid cooling plate 1 is formed by pressing on the plate body of the first panel 11. On the one hand, this can increase the mechanical strength of the first panel 11, and on the other hand, it can also increase the contact area between the first panel 11 and the coolant inside the liquid cooling plate 1, thereby improving the heat exchange efficiency; In an embodiment of the present application, preferably, a convex portion protruding toward the inside of the liquid cooling plate 1 is formed by pressing on the plate body of the second panel 12. On the one hand, this can increase the mechanical strength of the second panel 12, and on the other hand, it can also increase the contact area between the second panel 12 and the coolant inside the liquid cooling plate 1, thereby improving the heat exchange efficiency.

[0041] In an embodiment of the present application, preferably, as Figures 2 to 5 shown, a plurality of air ducts 51 are formed inside each heat dissipation structural member 5. The plurality of air ducts 51 are arranged side by side at intervals in the thickness direction of the liquid cooling plate 1. The air inlet pipe 52 and the air outlet pipe 53 both extend into the heat dissipation structural member 5. Openings are provided at the positions of the air inlet pipe 52 opposite to each air duct 51, so that the air inlet pipe 52 is communicated with each air duct 51, and openings are provided at the positions of the air outlet pipe 53 opposite to each air duct 51, so that the air outlet pipe 53 is communicated with each air duct 51. Thus, for any heat dissipation structural member 5, the distribution uniformity of the airflow flowing inside it in the thickness direction of the liquid cooling plate 1 can be effectively improved to ensure the heat exchange effect between it and the coolant.

[0042] In an embodiment of the present application, preferably, as Figure 2 and Figure 4As shown, the air inlet pipes 52 of multiple heat dissipation structural members 5 are located on the same side, and the air outlet pipes 53 of multiple heat dissipation structural members 5 are also located on the same side; the liquid cooling system further includes a wind guide cover 3, and the wind guide cover 3 is covered on the outer surface of the second panel 12, specifically covering the air inlet pipes 52 of multiple heat dissipation structural members 5, so that the air inlet pipes 52 of multiple heat dissipation structural members 5 are all covered in the wind guide cover 3; at the same time, one side plate of the wind guide cover 3 is a detachable filter hole plate 31.

[0043] Thus, when the power battery with the liquid cooling system of the present application is used in an electric vehicle, during the driving of the vehicle, the air in the external environment can enter the wind guide cover 3 through the holes in the filter hole plate 31 and then flow into the corresponding air duct 51 through the air inlet pipe 52; and through the wind guide cover 3 and the filter hole plate 31 of the wind guide cover 3, foreign objects, rainwater, etc. can be effectively blocked from entering the heat dissipation structural member 5. At the same time, the filter hole plate 31 is set to be detachable for easy cleaning.

[0044] In this embodiment, preferably, as Figure 2 and Figure 5 shown, a filter net cap 55 is sleeved at the pipe orifice of the air outlet pipe 53 of each heat dissipation structural member 5. For example, the filter net cap 55 is installed on the air outlet pipe 53 by screwing, so as to avoid the blockage of the air outlet pipe 53 by foreign objects without affecting the exhaust of the air outlet pipe 53.

[0045] In an embodiment of the present application, preferably, as Figure 1 shown, as described above, the liquid cooling plate 1 is attached to the battery module through the first panel 11, and the battery module includes multiple rows of battery packs arranged side by side along the first direction a; the liquid cooling system further includes a hollow partition 2, and the inner cavity of the partition 2 is also used for circulating the coolant. The partition 2 is vertically erected on the first panel 11, and the number of partitions 2 is multiple. The multiple partitions 2 are arranged side by side at intervals along the first direction a with their plate surfaces facing each other, so that a partition 2 is provided between any adjacent two rows of battery packs, and each partition 2 is in contact with the battery packs on both sides, thereby further improving the cooling effect on the battery module through the coolant flowing in the partition 2.

[0046] In an embodiment of the present application, preferably, the partition 2 and the liquid cooling plate 1 are interconnected, so that the coolant can first enter the liquid cooling plate 1, then flow into multiple partitions 2, and finally flow out through multiple partitions 2.

[0047] In this embodiment, preferably, as Figure 1As shown, the partition 2 includes a side wall facing the liquid cooling plate 1, and the side wall is provided with a connecting pipe connected to the inside of the partition 2 on both opposite sides along the second direction b, and the connecting pipe is provided with a first connecting piece. The first panel 11 is provided with a first liquid outlet 14 connected to the inside of the liquid cooling plate 1 at a position opposite to each connecting pipe, and the coolant in the liquid cooling plate 1 can flow out of the liquid cooling plate 1 through the first liquid outlet 14; at the same time, a second connecting piece is provided at each first liquid outlet 14, and the first connecting piece and the second connecting piece can be adapted and connected, so that each connecting pipe can be connected to the corresponding first liquid outlet 14, so that the coolant in the liquid cooling plate 1 can flow into the partition 2 to participate in heat exchange; at the same time, through the connection between the first connecting piece and the second connecting piece, the partition 2 is also fixedly installed on the liquid cooling plate 1.

[0048] Preferably, the first connecting member and the second connecting member are matching pipe joints, so that the two can be connected and communicated with each other.

[0049] In this embodiment, preferably, a liquid inlet 13 communicating with the inner cavity of the liquid cooling plate 1 is provided on the peripheral side frame of the liquid cooling plate 1 , so that the cooling liquid can enter the liquid cooling plate 1 and flow backward into the plurality of partitions 2 .

[0050] Preferably, the liquid cooling plate 1 is provided with at least one liquid inlet 13. When the liquid cooling plate 1 is provided with multiple liquid inlets 13, the multiple liquid inlets 13 are arranged at intervals on the peripheral side frame of the liquid cooling plate 1, so that liquid can be simultaneously fed into the liquid cooling plate 1 through the multiple liquid inlets 13 to ensure sufficient cooling liquid, thereby ensuring the cooling effect on the battery module.

[0051] Preferably, each partition 2 is provided with a second liquid outlet on the side away from the liquid cooling plate 1, and the liquid cooling system also includes a drain main pipe 4. The second liquid outlet of each partition 2 is connected to the drain main pipe 4, so that the coolant flows into the drain main pipe 4 after passing through multiple partitions 2, so as to transport the coolant to the outside of the battery module shell through the drain main pipe 4.

[0052] The present application also provides a power battery, comprising the liquid cooling system of any of the above embodiments.

[0053] In this embodiment, the power battery includes a liquid cooling system, so the power battery has all the beneficial effects of the liquid cooling system, which will not be described in detail here.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid cooling system, characterized in that, Includes liquid cooling plate; The first panel on one side of the liquid cooling plate in the thickness direction is used to face the battery module and be attached to the battery module. The liquid cooling plate is a hollow structure with an inner cavity. The inner cavity of the liquid cooling plate is used for circulating cooling liquid, and an air duct for ventilation is provided in the inner cavity of the liquid cooling plate.

2. The liquid cooling system according to claim 1, wherein The liquid cooling system includes a heat dissipation structure; The heat dissipation structure is arranged in the inner cavity of the liquid cooling plate, and the air duct is formed inside the heat dissipation structure; An air inlet pipe connected to the air duct for air intake into the air duct is provided at one end of the heat dissipation structure, and an air outlet pipe connected to the air duct for air outlet from the air duct is provided at the other end of the heat dissipation structure; A second panel is formed on a side of the liquid cooling plate away from the battery module, and through holes are provided at positions of the second panel opposite to the air inlet pipe and the air outlet pipe so that the air inlet pipe and the air outlet pipe can extend out of the liquid cooling plate.

3. The liquid cooling system according to claim 2, characterized in that, The outer side walls of the air inlet pipe and the air outlet pipe are both formed with external threaded connection parts, and are threaded with matching fasteners, and the fasteners are sealed against the outer plate surface of the second panel.

4. The liquid cooling system according to claim 2, wherein The liquid cooling plate has a first direction and a second direction perpendicular to its thickness direction, and the first direction and the second direction are perpendicular; The length direction of the heat dissipation structure is arranged along the first direction, and the heat dissipation structure is a plurality of heat dissipation structures arranged side by side and spaced apart along the second direction.

5. The liquid cooling system according to claim 4, wherein The heat dissipation structure is supported between the first panel and the second panel; The liquid cooling plate includes a peripheral frame disposed between the first panel and the second panel, and at least one end of the heat dissipation structure in the length direction does not contact the peripheral frame.

6. The liquid cooling system according to claim 4, wherein, The two opposite surfaces of the heat dissipation structure in the second direction are both arc surfaces; And / or, a protrusion protruding toward the inside of the liquid cooling plate is pressed and formed on the plate body of at least one of the first panel and the second panel.

7. The liquid cooling system according to claim 2, wherein, A plurality of the air ducts spaced side by side are formed inside the heat dissipation structure along the thickness direction of the liquid cooling plate; The air inlet pipe and the air outlet pipe both extend into the heat dissipation structure, and openings are provided at the position of the air inlet pipe opposite to each of the air ducts and at the position of the air outlet pipe opposite to each of the air ducts.

8. The liquid cooling system according to claim 4, wherein, The liquid cooling system further comprises an air guide cover, which is arranged on the outer surface of the second panel, and the air inlet pipes of the plurality of heat dissipation structural components are all located in the air guide cover; The side plate on one side of the air guide cover is a detachable filter plate; The pipe opening sleeve of the air outlet pipe is provided with a filter mesh cap.

9. The liquid cooling system according to claim 5, characterized in that The liquid cooling system further comprises a hollow partition, wherein the inner cavity of the partition is used for circulating the cooling liquid; The battery module includes a plurality of rows of battery packs arranged side by side along a first direction. The partition is vertically arranged on the first panel, and the partition is arranged between any two adjacent rows of battery packs.

10. The liquid cooling system according to claim 9, wherein The partition includes a side wall facing the liquid cooling plate, and the side wall is provided with connecting pipes on two opposite sides along the second direction, and the connecting pipes are connected to the inner cavity of the partition; A first liquid outlet is provided at a position of the first panel opposite to each of the connecting pipes; The adapter is provided with a first connecting member, and the first liquid outlet is provided with a second connecting member. The first connecting member and the second connecting member can be adaptively connected so that the adapter is communicated with the corresponding first liquid outlet.

11. The liquid cooling system according to claim 10, wherein The liquid inlet of the liquid cooling plate is arranged on the peripheral side frame of the liquid cooling plate; A second liquid outlet is provided on one side of each partition plate away from the liquid cooling plate. The liquid cooling system further includes a liquid discharge main pipe, and the liquid outlets of multiple partition plates are all communicated with the liquid discharge main pipe.

12. A power battery, characterized in that, It includes the liquid cooling system according to any one of claims 1 to 11.

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