Liquid cooling system and power battery

Abstract

The application 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 being directed to a battery module and being 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, so that heat generated during the operation of the battery module can be absorbed by the cooling liquid, heat exchange and cooling of the battery module are realized. Meanwhile, an air duct for ventilation is formed in the inner cavity of the liquid cooling plate, so that the airflow circulating in the air duct can exchange heat with the cooling liquid in the liquid cooling plate, the heat of the cooling liquid is absorbed, the cooling of the cooling liquid is realized, and the temperature rise of the cooling liquid in the liquid cooling plate due to the absorption of the heat of the battery module and the decline of the heat absorption capacity are avoided, and the cooling efficiency of the liquid cooling plate on the battery module can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of lithium-ion battery technology, and in particular to a liquid cooling system and a power battery. Background Technology

[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 large amount of heat during operation, excessively high temperatures can lead to performance degradation and even safety hazards. Therefore, an effective cooling system is crucial for the stable operation of power batteries.

[0003] Currently, liquid cooling is one of the commonly used heat dissipation methods for power batteries. Liquid cooling involves a coolant (such as water or a special coolant) flowing through a liquid cooling plate that is in close contact with the battery to remove the heat generated by the battery. This heat dissipation method has a simple structure and high heat dissipation efficiency, but it has a significant limitation: as the coolant continues to absorb the heat generated by the battery, its temperature gradually increases, leading to a decrease in its heat absorption capacity, which in turn affects the heat dissipation of the battery by the liquid cooling plate. Summary of the Invention

[0004] The purpose of this invention is to provide a liquid cooling system and a power battery to alleviate, to some extent, the problem of reduced heat absorption capacity of the liquid cooling plate due to the increase in internal coolant temperature.

[0005] This invention provides a liquid cooling system, including a liquid cooling plate;

[0006] The first panel on one side of the liquid cooling plate in the thickness direction is used to face the battery module and be in contact with 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 the flow of coolant, and the inner cavity of the liquid cooling plate is provided with an air duct for ventilation.

[0007] Furthermore, the liquid cooling system includes heat dissipation structural components;

[0008] The heat dissipation structure is disposed in the inner cavity of the liquid cooling plate, and the air duct is formed inside the heat dissipation structure.

[0009] One end of the heat dissipation structure is provided with an air inlet pipe that is connected to the air duct for air intake in the air duct, and the other end of the heat dissipation structure is provided with an air outlet pipe that is connected to the air duct for air exhaust in the air duct.

[0010] A second panel is formed on the side of the liquid cooling plate opposite to the battery module. The second panel is provided with through holes at positions 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.

[0011] Furthermore, both the air inlet pipe and the air outlet pipe have external threaded connections on their outer side walls, and are screwed with suitable fasteners, which are sealed against the outer surface of the second panel.

[0012] Furthermore, the liquid cooling plate has a first direction and a second direction that are perpendicular to its own thickness direction, and the first direction and the second direction are perpendicular to each other;

[0013] The length direction of the heat dissipation structure is arranged along the first direction, and the heat dissipation structure consists of multiple structures arranged side by side at intervals along the second direction.

[0014] Furthermore, the heat dissipation structure is supported between the first panel and the second panel;

[0015] The liquid cooling plate includes a peripheral frame surrounding 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.

[0016] Furthermore, both opposing surfaces of the heat dissipation structure in the second direction are arc surfaces;

[0017] And / or, at least one of the first panel and the second panel has a protrusion pressed into the plate body, protruding toward the interior of the liquid cooling plate.

[0018] Furthermore, the interior of the heat dissipation structure has a plurality of air ducts spaced side by side along the thickness direction of the liquid cooling plate;

[0019] Both the air inlet pipe and the air outlet pipe extend into the heat dissipation structure, and the air inlet pipe and the air outlet pipe are provided with openings at the positions opposite to each air duct.

[0020] Furthermore, the liquid cooling system also includes an air guide shroud, which is disposed on the outer surface of the second panel, and the air inlet pipes of the plurality of heat dissipation structural components are all located inside the air guide shroud;

[0021] One side panel of the air guide shroud is a detachable filter plate.

[0022] The outlet pipe is fitted with a filter cap.

[0023] Furthermore, the liquid cooling system also includes a hollow partition, the inner cavity of which is used for the flow of coolant;

[0024] The battery module includes multiple rows of battery packs arranged side by side along a first direction. The partition is vertically erected on the first panel, and the partition is provided between any two adjacent rows of battery packs.

[0025] Furthermore, the partition includes a sidewall facing the liquid cooling plate, and the sidewall is provided with a connecting pipe on both opposite sides along the second direction, the connecting pipe communicating with the inner cavity of the partition;

[0026] The first panel is provided with a first liquid outlet at the position opposite to each of the aforementioned connectors;

[0027] The connecting pipe is provided with a first connector, and the first liquid outlet is provided with a second connector. The first connector and the second connector can be adapted to be connected so that the connecting pipe is connected to the corresponding first liquid outlet.

[0028] Furthermore, the liquid inlet of the liquid cooling plate is located on the peripheral frame of the liquid cooling plate;

[0029] Each of the partitions has a second liquid outlet on the side away from the liquid cooling plate. The liquid cooling system also includes a main drain pipe, and the liquid outlets of the multiple partitions are all connected to the main drain pipe.

[0030] The present invention also provides a power battery, including the liquid cooling system described in any of the above claims.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] The liquid cooling system provided by the present invention includes a liquid cooling plate, one side of which is positioned facing and in contact with the battery module to facilitate heat exchange. The liquid cooling plate is a hollow structure with an inner cavity for the flow of coolant (such as water or other refrigerant). This allows the coolant to absorb the heat generated by the battery module during operation and carry it away, thereby achieving heat exchange and cooling of the battery module.

[0033] Meanwhile, the inner cavity of the liquid cooling plate has air ducts for ventilation, such as allowing air to circulate within the ducts. The airflow within the ducts can exchange heat with the coolant in the liquid cooling plate to absorb the heat from the coolant and cool it down. This prevents the coolant in the liquid cooling plate from absorbing heat from the battery module and causing its temperature to rise, thus reducing its heat absorption capacity. In this way, the cooling efficiency of the liquid cooling plate for the battery module can be effectively improved.

[0034] The present invention also provides a power battery including the liquid cooling system described above, and thus the power battery also has the beneficial effects of the liquid cooling system. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a liquid cooling system provided in an embodiment of the present invention;

[0037] Figure 2 A cross-sectional schematic diagram of the liquid cooling plate provided in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of a heat dissipation structure provided in an embodiment of the present invention;

[0039] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0040] Figure 5 for Figure 2 Enlarged view of section B in the middle.

[0041] Figure label:

[0042] 1-Liquid cooling plate, 11-First panel, 12-Second panel, 13-Liquid inlet, 14-First liquid outlet, 2-Baffle, 3-Air guide shroud, 31-Filter plate, 4-Main drain pipe, 5-Heat dissipation structure, 51-Air duct, 52-Air inlet pipe, 53-Air outlet pipe, 54-Fasteners, 55-Filter cap;

[0043] a - First direction, b - Second direction. Detailed Implementation

[0044] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0046] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] The following reference Figures 1 to 5 This application describes a liquid cooling system and a power battery according to some embodiments.

[0050] This application provides a liquid cooling system for a power battery to dissipate heat from the battery module.

[0051] like Figure 1 As shown, the liquid cooling system includes a liquid cooling plate 1. A first panel 11 on one side of the liquid cooling plate 1 in the thickness direction is used to face and contact the battery module so as 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 to circulate coolant (such as water or other refrigerant), so that the heat generated by the battery module during operation can be absorbed by the circulating coolant and the heat can be carried away to achieve heat exchange and cooling of the battery module.

[0052] At the same time, combined Figure 2 and Figure 3 As shown, an air duct 51 for ventilation is formed in the inner cavity of the liquid cooling plate 1, for example, allowing air to circulate in the air duct 51; the airflow 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 cool the coolant, thereby preventing the coolant in the liquid cooling plate 1 from absorbing the heat of the battery module and causing the temperature to rise and the heat absorption capacity to decrease, thus effectively improving the cooling efficiency of the liquid cooling plate 1 for the battery module.

[0053] In one embodiment of this application, preferably, as shown below, Figures 2 to 5As shown, the liquid cooling system includes a heat dissipation structure 5, which is disposed in the inner cavity of the liquid cooling plate 1. The heat dissipation structure 5 forms the aforementioned air duct 51 inside, and one end of the heat dissipation structure 5 is provided with an air inlet pipe 52 that communicates with the air duct 51 so as to realize the air intake of the air duct 51 through the air inlet pipe 52. The other end of the heat dissipation structure 5 is provided with an air outlet pipe 53 that communicates with the air duct 51 so as to realize the air exhaust of the air duct 51 through the air outlet pipe 53.

[0054] A second panel 12 is formed on the side of the liquid cooling plate 1 away from the battery module. The ends of the air inlet pipe 52 and the air outlet pipe 53 away from the heat dissipation structure 5 both extend toward the second panel 12. The second panel 12 has through holes at positions opposite to the air inlet pipe 52 and opposite to the air outlet pipe 53, allowing the air inlet pipe 52 and the air outlet pipe 53 to extend out of the liquid cooling plate 1 through the corresponding through holes. This facilitates external air supply through the air inlet pipe 52, enabling ventilation into the air duct 51. After heat exchange between the airflow and the coolant in the air duct 51, the heat can be carried away from the liquid cooling plate 1 through the air outlet pipe 53.

[0055] In this embodiment, preferably, the heat dissipation structure 5 is fastened to the liquid cooling plate 1 by fasteners 54; specifically, as shown in the example... Figure 4 and Figure 5 As shown, the outer walls of the air inlet pipe 52 and the air outlet pipe 53 are formed with external threaded connections and fitted fasteners 54 are screwed on. Tightening the fasteners 54 can make the fasteners 54 press against the outer surface of the second panel 12, thereby using the fasteners 54 to fasten the heat dissipation structure 5 to the inner cavity of the liquid cooling plate 1.

[0056] Meanwhile, a sealing gasket is provided between the fastener 54 and the second panel 12. The fastener 54 is sealed against the second panel 12 through the sealing gasket. Thus, the through hole of the air inlet pipe 52 on the second panel 12 can be sealed by the fastener 54 on the air inlet pipe 52 and the sealing gasket. The through hole of the air outlet pipe 53 on the second panel 12 can be sealed by the fastener 54 on the air outlet pipe 53, thereby preventing liquid leakage from the liquid cooling plate 1.

[0057] In one embodiment of this application, preferably, the liquid cooling plate 1 has a first direction a and a second direction b that are 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 the number of heat dissipation structure 5 is multiple, and the multiple heat dissipation structure 5 are arranged side by side and spaced along the second direction b, so that the coolant in the liquid cooling plate 1 can be uniformly cooled through the air duct 51 of the multiple heat dissipation structure 5, and the cooling efficiency can be improved.

[0058] 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, so that the heat dissipation structure 5 is supported between the first panel 11 and the second panel 12, thereby enhancing the structural strength of the liquid cooling plate 1, preventing the liquid cooling plate 1 from collapsing and affecting the smooth flow of coolant, and enabling the liquid cooling plate 1 to stably exchange heat and cool the battery module.

[0059] Meanwhile, the liquid cooling plate 1 includes a peripheral frame surrounding the first panel 11 and the second panel 12. The length of the heat dissipation structure 5 along 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 heat dissipation structure 5 at opposite ends in the first direction a does not contact the peripheral frame of the liquid cooling plate 1, thereby avoiding the heat dissipation structure 5 from affecting the smooth flow of coolant in the inner cavity of the liquid cooling plate 1.

[0060] In one embodiment of this application, preferably, as shown below, Figure 3 As shown, the two opposing surfaces of the heat dissipation structure 5 in the second direction b are both arc surfaces, which can increase the contact area between the heat dissipation structure 5 and the coolant in the liquid cooling plate 1 to a certain extent, thereby improving the cooling efficiency of the coolant.

[0061] In one embodiment of this application, preferably, as shown below, Figure 2 As shown, a protrusion protruding towards the interior of the liquid cooling plate 1 is pressed onto the body of the first panel 11, which can increase the mechanical strength of the first panel 11 on the one hand, and increase the contact area between the first panel 11 and the coolant inside the liquid cooling plate 1 on the other hand, thereby improving the heat exchange efficiency.

[0062] In one embodiment of this application, preferably, a protrusion protruding toward the interior of the liquid cooling plate 1 is pressed onto the body of the second panel 12, thereby increasing the mechanical strength of the second panel 12 and increasing the contact area between the second panel 12 and the coolant inside the liquid cooling plate 1, thus improving the heat exchange efficiency.

[0063] In one embodiment of this application, preferably, as shown below, Figures 2 to 5 As shown, each heat dissipation structure 5 has multiple air ducts 51 inside. These air ducts 51 are arranged side-by-side at intervals along the thickness direction of the liquid cooling plate 1. Both the inlet pipe 52 and the outlet pipe 53 extend into the heat dissipation structure 5. The inlet pipe 52 has an opening opposite to each air duct 51, allowing them to communicate with each other. Similarly, the outlet pipe 53 has an opening opposite to each air duct 51, also allowing them to communicate with each other. This effectively improves the uniformity of airflow distribution along the thickness direction of the liquid cooling plate 1 for any heat dissipation structure 5, ensuring efficient heat exchange with the coolant.

[0064] In one embodiment of this application, preferably, as shown below, Figure 2 and Figure 4 As shown, the air inlet pipes 52 of multiple heat dissipation structural components 5 are located on the same side, and the air outlet pipes 53 of multiple heat dissipation structural components 5 are also located on the same side; the liquid cooling system also includes an air guide shroud 3, which is installed on the outer surface of the second panel 12, specifically on the air inlet pipes 52 of multiple heat dissipation structural components 5, so that the air inlet pipes 52 of multiple heat dissipation structural components 5 are all installed inside the air guide shroud 3; at the same time, the side plate on one side of the air guide shroud 3 is a detachable filter plate 31.

[0065] Therefore, when the power battery equipped with the liquid cooling system of this application is used in an electric vehicle, during vehicle operation, air from the external environment can enter the air guide shroud 3 through the holes on the filter plate 31 and then flow into the corresponding air duct 51 through the air inlet pipe 52; and the air guide shroud 3 and the filter plate 31 of the air guide shroud 3 can effectively block foreign objects, rainwater, etc. from entering the heat dissipation structure 5. At the same time, the filter plate 31 is designed to be removable for easy cleaning.

[0066] In this embodiment, preferably, as follows: Figure 2 and Figure 5 As shown, each heat dissipation structure 5 has a filter cap 55 fitted at the opening of the air outlet 53. For example, the filter cap 55 is installed on the air outlet 53 by screwing, so as to prevent foreign objects from blocking the air outlet 53 without affecting the exhaust of the air outlet 53.

[0067] In one embodiment of this application, preferably, as shown below, Figure 1 As shown above, the liquid cooling plate 1 is attached to the battery module through the first panel 11. The battery module includes multiple rows of battery packs arranged side by side along the first direction a. The liquid cooling system also includes a hollow partition 2. The inner cavity of the partition 2 is also used for the flow of coolant. The partition 2 is vertically erected on the first panel 11, and there are multiple partitions 2. The multiple partitions 2 are arranged side by side with their surfaces facing each other along the first direction a, so that a partition 2 is provided between any two adjacent rows of battery packs, and each partition 2 is attached to the battery packs on both sides. This further improves the cooling effect on the battery module through the coolant flowing in the partition 2.

[0068] In one embodiment of this 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 the multiple partitions 2, and finally flow out through the multiple partitions 2.

[0069] In this embodiment, preferably, as follows: Figure 1As shown, the partition 2 includes a sidewall facing the liquid-cooled plate 1. On opposite sides of this sidewall along the second direction b, there are connecting pipes communicating with the interior of the partition 2, and each connecting pipe is provided with a first connector. The first panel 11, opposite to each connecting pipe, has a first liquid outlet 14 communicating with the interior of the liquid-cooled plate 1. Coolant in the liquid-cooled plate 1 can flow out through the first liquid outlet 14. Simultaneously, each first liquid outlet 14 is provided with a second connector, which can be fitted together to connect with the first connector, allowing each connecting pipe to communicate with its corresponding first liquid outlet 14, enabling coolant in the liquid-cooled plate 1 to flow into the partition 2 for heat exchange. Furthermore, the connection between the first and second connectors also secures the partition 2 to the liquid-cooled plate 1.

[0070] Preferably, the first connector and the second connector are compatible pipe fittings, enabling them to be connected and achieve communication.

[0071] In this embodiment, preferably, the liquid cooling plate 1 has a liquid inlet 13 on its peripheral side frame that communicates with its own inner cavity, so that the coolant can enter the liquid cooling plate 1 and flow backward into multiple partitions 2.

[0072] 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 frame of the liquid cooling plate 1, so that liquid can be introduced into the liquid cooling plate 1 at the same time through multiple liquid inlets 13 to ensure sufficient coolant and thus ensure the cooling effect on the battery module.

[0073] Preferably, each partition 2 is provided with a second liquid outlet on the side away from the liquid cooling plate 1. The liquid cooling system also includes a drain manifold 4. The second liquid outlet of each partition 2 is connected to the drain manifold 4, so that the coolant flows into the drain manifold 4 after passing through multiple partitions 2, so that the coolant can be transported to the outside of the battery module housing through the drain manifold 4.

[0074] This application also provides a power battery, including the liquid cooling system of any of the above embodiments.

[0075] In this embodiment, the power battery includes a liquid cooling system, and therefore the power battery has all the beneficial effects of the liquid cooling system, which will not be described in detail here.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions 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, Including liquid cooling plates; The first panel on one side of the liquid cooling plate in the thickness direction is used to face the battery module and be in contact with 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 the flow of coolant, and the inner cavity of the liquid cooling plate is provided with an air duct for ventilation. The liquid cooling system includes heat dissipation structural components; The heat dissipation structure is disposed in the inner cavity of the liquid cooling plate, and the air duct is formed inside the heat dissipation structure. The liquid cooling plate has a first direction and a second direction that are perpendicular to its own thickness direction, and the first direction and the second direction are perpendicular to each other. The length direction of the heat dissipation structure is arranged along the first direction, and the heat dissipation structure consists of multiple structures arranged side by side at intervals along the second direction; A second panel is formed on the side of the liquid cooling plate opposite to the battery module; The heat dissipation structure is supported between the first panel and the second panel; The liquid cooling plate includes a peripheral frame surrounding the first panel and the second panel. The length of the heat dissipation structure along the first direction is less than the length of the inner cavity of the liquid cooling plate in the first direction, so that at least one end of the heat dissipation structure along the length direction does not contact the peripheral frame. The heat dissipation structure has multiple air ducts spaced side by side along the thickness direction of the liquid cooling plate inside. One end of the heat dissipation structure is provided with an air inlet pipe that is connected to the air duct for air intake in the air duct, and the other end of the heat dissipation structure is provided with an air outlet pipe that is connected to the air duct for air exhaust in the air duct. The second panel is provided with through holes at positions 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.

2. The liquid cooling system according to claim 1, characterized in that, Both the air inlet pipe and the air outlet pipe have external threaded connections on their outer walls, and are screwed with suitable fasteners. The fasteners are sealed against the outer surface of the second panel.

3. The liquid cooling system according to claim 1, characterized in that, The heat dissipation structure has two curved surfaces on opposite sides in the second direction; And / or, at least one of the first panel and the second panel has a protrusion pressed into the plate body, protruding toward the interior of the liquid cooling plate.

4. The liquid cooling system according to claim 1, characterized in that, Both the air inlet pipe and the air outlet pipe extend into the heat dissipation structure, and the air inlet pipe and the air outlet pipe are provided with openings at the positions opposite to each of the air ducts.

5. The liquid cooling system according to claim 1, characterized in that, The liquid cooling system also includes an air guide shroud, which is installed on the outer surface of the second panel, and the air inlet pipes of the plurality of heat dissipation structural components are all located inside the air guide shroud; One side panel of the air guide shroud is a detachable filter plate. The outlet pipe is fitted with a filter cap.

6. The liquid cooling system according to claim 1, characterized in that, The liquid cooling system also includes a hollow partition, the inner cavity of which is used for the flow of coolant; The battery module includes multiple rows of battery packs arranged side by side along a first direction. The partition is vertically erected on the first panel, and the partition is provided between any two adjacent rows of battery packs.

7. The liquid cooling system according to claim 6, characterized in that, The partition includes a sidewall facing the liquid cooling plate, and the sidewall is provided with a connecting pipe on both opposite sides along the second direction, the connecting pipe communicating with the inner cavity of the partition; The first panel is provided with a first liquid outlet at the position opposite to each of the aforementioned connectors; The connecting pipe is provided with a first connector, and the first liquid outlet is provided with a second connector. The first connector and the second connector can be adapted to be connected so that the connecting pipe is connected to the corresponding first liquid outlet.

8. The liquid cooling system according to claim 7, characterized in that, The liquid inlet of the liquid cooling plate is located on the peripheral frame of the liquid cooling plate; Each of the partitions has a second liquid outlet on the side away from the liquid cooling plate. The liquid cooling system also includes a main drain pipe, and the liquid outlets of the multiple partitions are all connected to the main drain pipe.

9. A power battery, characterized in that, The liquid cooling system includes any one of claims 1 to 8.

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