Liquid cooling system and battery system

Abstract

The utility model discloses a liquid cooling system and a battery system, comprising a plurality of liquid cooling plates, each liquid cooling plate is provided with a first liquid cooling joint which penetrates through the respective opposite surface in a sealing manner, and the two opposite ends of the first liquid cooling joint are provided with a first liquid cooling interface and a second liquid cooling interface which are communicated with each other; the first liquid cooling interface and the second liquid cooling interface are used for feeding a cooling medium and discharging the cooling medium respectively, first through holes communicated with the first liquid cooling interface and the second liquid cooling interface are further formed in the first liquid cooling connector, and the first through holes are located in the liquid cooling plates and communicated with the interiors of the liquid cooling plates; the apertures of the first through holes communicated with the interiors of the liquid cooling plates are the same or different or partially the same, and in any two adjacent liquid cooling plates, the second liquid cooling interface on one liquid cooling plate is communicated with the first liquid cooling interface on the other liquid cooling plate. Therefore, the cooling medium can be shunted to different liquid cooling plates, the different liquid cooling plates can generate different cooling effects, and meanwhile, the number of branches of the liquid cooling pipeline is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a liquid cooling system and a battery system. Background Art

[0002] Power batteries generate a lot of heat during use, and liquid cooling plates are often used to dissipate heat and cool down the batteries to ensure normal use of the batteries. The liquid cooling plate has a liquid cooling channel, and the cooling medium is input into the liquid cooling plate through an external liquid cooling interface structure, so that the liquid cooling plate can achieve the purpose of cooling.

[0003] At present, the existing Chinese patent (Announcement No.: CN218919029U) discloses a liquid cooling interface structure, a liquid cooling system and a battery box, which includes a flow channel base, a flow channel water inlet assembly and a flow channel water outlet assembly, wherein the flow channel base is provided with a water inlet interface and multiple water outlet interfaces; the flow channel water inlet assembly is connected to the water inlet interface; each flow channel water outlet assembly is connected to a water outlet interface, each flow channel water outlet assembly has a liquid cooling flow channel connected to the water outlet interface connected thereto, and the flow channel calibers of the liquid cooling flow channels of at least two flow channel water outlet assemblies are different. Although it can make the cooling medium be diverted to the flow channel water outlet assemblies with different flow channel calibers, so that each flow channel water outlet assembly produces different cooling effects, and then different liquid cooling plates can produce different cooling effects. However, the number of branches of its liquid cooling pipeline is large, and the branch interface models of the liquid cooling pipeline are not unified, resulting in a large number of branch interface models of the liquid cooling pipeline, which makes the assembly process of the liquid cooling system complicated during the assembly of the battery system, resulting in a high cost of the liquid cooling system. Utility Model Content

[0004] One of the main purposes of the utility model is to provide a liquid cooling system and a battery system, which can divert the cooling medium to different liquid cooling plates, and enable different liquid cooling plates to produce different cooling effects, while reducing the number of branches of the liquid cooling pipeline, solving the problem of a large number of branch interface models of the liquid cooling pipeline due to the non-uniform branch interface models of the liquid cooling pipeline, thereby reducing the cost of the liquid cooling system and simplifying the assembly process of the liquid cooling system during the assembly of the battery system.

[0005] In order to achieve the above-mentioned purpose of the utility model, the first aspect of the utility model proposes a liquid cooling system, including multiple liquid cooling plates, each of which is provided with a first liquid cooling joint that is sealed and passes through its respective relative surfaces, and the first two ends of the first liquid cooling joint are provided with a first liquid cooling interface and a second liquid cooling interface that are communicated with each other, the first liquid cooling interface is used to enter the cooling medium, and the second liquid cooling interface is used to discharge the cooling medium, and the first liquid cooling interface is also provided on the first liquid cooling joint. A first through hole that is communicated with the first liquid cooling interface and the second liquid cooling interface is provided, the first through hole is located in the liquid cooling plate and is communicated with the interior of the liquid cooling plate; the apertures of the first through holes that are communicated with the interior of each liquid cooling plate are all the same or different or partially the same or partially different. In any two adjacent liquid cooling plates, the second liquid cooling interface on one liquid cooling plate is connected to the first liquid cooling interface on the other liquid cooling plate through a liquid cooling pipeline.

[0006] Furthermore, the diameter of each of the first through holes gradually increases according to the order in which the cooling medium enters each liquid cooling plate. Furthermore, the inner diameter of the first liquid cooling interface is the same as that of the second liquid cooling interface; the outer diameter of the first liquid cooling interface is the same as that of the second liquid cooling interface.

[0007] Furthermore, the opposite ends of the liquid cooling pipeline are respectively plugged into and locked with the first liquid cooling interface and the second liquid cooling interface.

[0008] Furthermore, the first end of the liquid cooling pipeline and the first liquid cooling interface are secondarily locked by a locking structure arranged on the outer wall of the first end of the liquid cooling pipeline, and the second end of the liquid cooling pipeline and the second liquid cooling interface are secondarily locked by a locking structure arranged on the outer wall of the second end of the liquid cooling pipeline.

[0009] Furthermore, each of the liquid-cooling plates is also provided with a second liquid-cooling joint that is sealed and passes through its respective relative surfaces, and a third liquid-cooling interface and a fourth liquid-cooling interface that are communicated with each other are provided at opposite ends of the second liquid-cooling joint, the third liquid-cooling interface is used for the inlet of cooling medium, and the fourth liquid-cooling interface is used for the outlet of cooling medium, and the second liquid-cooling joint is also provided with a second through hole that is communicated with the third liquid-cooling interface and the fourth liquid-cooling interface, each of the second through holes is located in each of the liquid-cooling plates and is communicated with the interior of each of the liquid-cooling plates, and the aperture of each of the second through holes that is communicated with the interior of the liquid-cooling plate is different, and in any two adjacent liquid-cooling plates, the third liquid-cooling interface on one liquid-cooling plate is connected to the fourth liquid-cooling interface on the other liquid-cooling plate through a liquid cooling pipeline; the second liquid-cooling interface on the last liquid-cooling plate among the multiple liquid-cooling plates is connected to the third liquid-cooling interface.

[0010] Further, the second liquid-cooling joint and the first liquid-cooling joint are arranged on the same side of the liquid-cooling plate; or, the second liquid-cooling joint and the first liquid-cooling joint are arranged on different sides of the liquid-cooling plate.

[0011] Furthermore, the diameter of each of the second through holes is the same as the diameter of each of the first through holes. Furthermore, the liquid cooling pipeline is a non-metallic hose.

[0012] The second aspect of the utility model proposes a battery system, including a battery box and a liquid cooling system of the utility model, wherein a plurality of battery cells are arranged in the battery box, the number of the battery cells corresponds one to one with the number of the liquid cooling plates, and each liquid cooling plate of the liquid cooling system is used to cool each battery cell.

[0013] Compared with the prior art, the liquid cooling system and battery system of the utility model have the following beneficial effects:

[0014] 1. When the liquid cooling system of the utility model is in use, the aperture of each first through hole communicating with the interior of the liquid cooling plate is set to be different, and the flow rate of the cooling medium entering the interior of each liquid cooling plate from the first through hole is controlled to achieve flow distribution according to different requirements, so that the cooling medium can be diverted to different liquid cooling plates, and different liquid cooling plates can produce different cooling effects. The above technical solution can avoid the installation of branch lines of the liquid cooling pipeline, thereby reducing the number of branches of the liquid cooling pipeline, solving the problem of a large number of branch interface models of the liquid cooling pipeline due to the non-uniformity of the branch interface models of the liquid cooling pipeline, reducing the cost of the liquid cooling system, and simplifying the assembly process of the liquid cooling system during the assembly of the battery system.

[0015] 2. The battery system of the present invention uses the liquid cooling system of the present invention, and the number of battery cells corresponds to the number of liquid cooling plates. A single battery cell is cooled by a liquid cooling plate, thereby being able to meet different cooling requirements for battery cells in different areas of the battery box, effectively improving the thermal management efficiency of the battery system and enhancing its adaptability to the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the liquid cooling system of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of connecting multiple liquid cooling plates according to an embodiment of the utility model;

[0018] Figure 3 for Figure 2 The cross-sectional view at AA in the middle;

[0019] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0020] Figure 5 This is a schematic diagram of the structure of a liquid cooling plate according to an embodiment of the utility model;

[0021] Figure 6This is a schematic structural diagram of a liquid cooling plate according to another embodiment of the utility model;

[0022] Figure 7 for Figure 6 Sectional view at CC;

[0023] Figure 8 This is a schematic structural diagram of a liquid cooling pipeline according to an embodiment of the utility model.

[0024] Reference numerals in the accompanying drawings:

[0025] 10. Liquid cooling plate; 11. First liquid cooling joint; 110. First liquid cooling interface; 111. Second liquid cooling interface; 112. First through hole; 12. Second liquid cooling joint; 120. Third liquid cooling interface; 121. Fourth liquid cooling interface; 122. Second through hole; 20. Liquid cooling pipeline; 30. Connecting elbow; 40. Cooling medium inlet pipeline; 50. Cooling medium outlet pipeline. DETAILED DESCRIPTION

[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] In the description of the present invention, it should be understood that the terms "width", "up", "down", "front", "back", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are 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 on the present invention.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" 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, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] At present, the existing Chinese patent (Announcement No.: CN218919029U) discloses a liquid cooling interface structure, a liquid cooling system and a battery box, which includes a flow channel base, a flow channel water inlet assembly and a flow channel water outlet assembly, wherein the flow channel base is provided with a water inlet interface and multiple water outlet interfaces; the flow channel water inlet assembly is connected to the water inlet interface; each flow channel water outlet assembly is connected to a water outlet interface, each flow channel water outlet assembly has a liquid cooling flow channel connected to the water outlet interface connected thereto, and the flow channel calibers of the liquid cooling flow channels of at least two flow channel water outlet assemblies are different. Although it can make the cooling medium be diverted to the flow channel water outlet assemblies with different flow channel calibers, so that each flow channel water outlet assembly produces different cooling effects, and then different liquid cooling plates can produce different cooling effects. However, the number of branches of its liquid cooling pipeline (flow channel water outlet assembly) is large, and the branch interface models of the liquid cooling pipeline are not unified, resulting in a large number of branch interface models of the liquid cooling pipeline, which makes the assembly process of the liquid cooling system complicated during the assembly of the battery system, resulting in a high cost of the liquid cooling system.

[0031] Based on this, the utility model provides a liquid cooling system and a battery system, which can divert the cooling medium to different liquid cooling plates, and enable different liquid cooling plates to produce different cooling effects, while reducing the number of branches of the liquid cooling pipeline, solving the problem of a large number of branch interface models of the liquid cooling pipeline due to the non-uniform branch interface models of the liquid cooling pipeline, thereby reducing the cost of the liquid cooling system and simplifying the assembly process of the liquid cooling system during the assembly of the battery system.

[0032] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0033] Please refer to Figure 1-Figure 8In the first aspect, the utility model provides a liquid cooling system, comprising a plurality of liquid cooling plates 10, wherein the plurality of liquid cooling plates 10 are connected in series by liquid cooling pipes 20. Each liquid cooling plate 10 is provided with a first liquid cooling joint 11 which is sealed and penetrates through the respective relative surfaces, so as to prevent the cooling medium from leaking from the connection position between the first liquid cooling joint 11 and the liquid cooling plate 10; a first liquid cooling interface 110 and a second liquid cooling interface 111 are provided at opposite ends of the first liquid cooling joint 11, and the first liquid cooling interface 110 and the second liquid cooling interface 111 are connected to each other, the first liquid cooling interface 110 is used for the cooling medium to enter, and the second liquid cooling interface 111 is used for the cooling medium to exit. In addition, a first through hole 112 communicating with the first liquid cooling interface 110 and the second liquid cooling interface 111 is also provided on the first liquid cooling joint 11. The first through hole 112 is located in the liquid cooling plate 10 and communicates with the interior of the liquid cooling plate 10. The apertures of each first through hole 112 communicating with the interior of the liquid cooling plate 10 are different. In any two adjacent liquid cooling plates 10, the second liquid cooling interface 111 on one liquid cooling plate 10 is communicated with the first liquid cooling interface 110 on the other liquid cooling plate 10 through the liquid cooling pipeline 20. It can be understood that when the liquid cooling system of the present invention is in use, by setting the apertures of each first through hole 112 communicating with the interior of the liquid cooling plate 10 to be different, the flow rate of the cooling medium entering the interior of each liquid cooling plate 10 from the first through hole 112 is controlled to achieve flow distribution according to different requirements, so that the cooling medium can be diverted to different liquid cooling plates 10, and different liquid cooling plates 10 can produce different cooling effects. By adopting the above technical solution, the installation of branches of the liquid cooling pipeline 20 can be avoided, thereby reducing the number of branches of the liquid cooling pipeline 20, solving the problem of a large number of branch interface models of the liquid cooling pipeline 20 due to the non-uniform branch interface models, reducing the cost of the liquid cooling system, and simplifying the assembly process of the liquid cooling system during the battery system assembly process.

[0034] In one embodiment, the diameters of the first through holes communicating with the interior of each liquid cooling plate may also be the same, so that the cooling medium can be diverted to different liquid cooling plates at the same flow rate.

[0035] In another embodiment, the apertures of the first through holes communicating with the interior of each liquid cooling plate may be partially the same or partially different, and may be reasonably changed according to the actual situation, which is not limited here. It should be noted that the cooling medium may be a cooling liquid or a cooling gas, which is not limited here.

[0036] In one embodiment, referring to Figure 5, the first liquid cooling joint 11 and the liquid cooling plate 10 are both made of metal, and the first liquid cooling joint 11 and the liquid cooling plate 10 are welded together. It can be understood that the liquid cooling plate 10 and the first liquid cooling joint 11 are connected together by a welding process. Among them, the number of liquid cooling plates 10 in the liquid cooling system is greater than or equal to two, and the first liquid cooling joint 11 can be on the same side or both sides of the liquid cooling plate 10, which is not limited here.

[0037] In one embodiment, referring to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 , the inner diameter of the first liquid cooling interface 110 and the second liquid cooling interface 111 on the first liquid cooling joint 11 is the same; the outer diameter of the first liquid cooling interface 110 and the second liquid cooling interface 111 on the first liquid cooling joint 11 is also the same. That is, it can be understood that the interface model of the first liquid cooling interface 110 and the second liquid cooling interface 111 on each first liquid cooling joint 11 is the same. Due to the first liquid cooling interface 110, the second liquid cooling interface 111 and the first through hole 112 on the first liquid cooling joint 11, the first liquid cooling joint 11 is a three-way structure; wherein, the first liquid cooling interface 110 and the second liquid cooling interface 111 on the first liquid cooling joint 11 are oppositely communicating liquid cooling interfaces, which are respectively used to connect the front and rear pipelines; and the first through hole 112 on the first liquid cooling joint 11 is an intermediate through hole interface, and the first through hole 112 is communicated with the hollow flow channel inside the liquid cooling plate 10, forming an inflow channel for the cooling medium to flow into the liquid cooling plate 10, and the diameter of the first through hole 112 can be adjusted according to the flow distribution needs of the liquid cooling plate 10, so as to realize the flow distribution of the multi-branch liquid cooling system.

[0038] It should be noted that, refer to Figure 3 Since the first liquid cooling interface 110 and the second liquid cooling interface 111 on the first liquid cooling joint 11 are of the same model (same size), the model of the hose 20 interface connecting each liquid cooling plate 10 is consistent, thereby simplifying the model types of the connection pipeline 20 interface and reducing the design cost. In addition, since the first through hole 112 on the first liquid cooling joint 11 is connected to the hollow flow channel inside the liquid cooling plate 10, it constitutes an inflow channel for the cooling medium to flow into the liquid cooling plate 10. In this way, by setting the aperture size of the first through hole 112 that communicates with the inside of each liquid cooling plate 10, that is, by adjusting the size of the first through hole 112, the flow distribution between multiple liquid cooling plates 10 is achieved.

[0039] In one embodiment, referring to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7The liquid cooling plate 10 is also provided with a second liquid cooling joint 12 which is sealed and penetrates through the respective opposite surfaces to prevent the cooling medium from leaking from the connection position between the second liquid cooling joint 12 and the liquid cooling plate 10. Figure 5 As shown, a first liquid cooling joint 11 and a second liquid cooling joint 12 are provided on a liquid cooling plate 10. Figure 6 and Figure 7 The second liquid-cooling joint 12 has the same structure as the first liquid-cooling joint 11. Therefore, the second liquid-cooling joint 12 has a third liquid-cooling interface 120 and a fourth liquid-cooling interface 121 that are in communication with each other at opposite ends. The third liquid-cooling interface 120 and the fourth liquid-cooling interface 121 are used for entering and exiting the cooling medium, respectively. In addition, the second liquid-cooling joint 12 is also provided with a second through hole 122 that is in communication with the third liquid-cooling interface 120 and the fourth liquid-cooling interface 121. Each second through hole 122 is located in each liquid-cooling plate 10 and is in communication with the interior of each liquid-cooling plate 10. The aperture of each second through hole 122 that is in communication with the interior of the liquid-cooling plate 10 is different. In any two adjacent liquid-cooling plates 10, the third liquid-cooling interface 120 on one liquid-cooling plate 10 is connected to the fourth liquid-cooling interface 121 on the other liquid-cooling plate 10 through a liquid-cooling pipeline 20. From this, it can be understood that the third liquid cooling interface 120 and the fourth liquid cooling interface 121 on the second liquid cooling joint 12 are oppositely communicating liquid cooling interfaces, which are respectively used to connect the front and rear pipelines; and the second through hole 122 on the second liquid cooling joint 12 is an intermediate through hole interface, and the second through hole 122 is communicated with the hollow flow channel inside the liquid cooling plate 10, constituting an outflow channel for the cooling medium to flow out of the liquid cooling plate 10.

[0040] For example, refer to Figure 1 The liquid cooling plate 10 is usually placed vertically, and multiple liquid cooling plates 10 are connected by liquid cooling pipes 20. The length of the liquid cooling pipes 20 can be adjusted according to the spacing of the liquid cooling plates 10. However, the interface model of the liquid cooling pipes 20 is consistent. Multiple liquid cooling plates 10 are connected by liquid cooling pipes 20 to form a liquid cooling system for the battery pack.

[0041] In one embodiment, referring to Figure 1 In order to facilitate the connection of the liquid cooling system to the external input and output interfaces, the first liquid cooling interface 110 on the first liquid cooling plate 10 among the multiple liquid cooling plates 10 is connected to the inlet cooling medium pipeline 40, and the fourth liquid cooling interface 121 on the first liquid cooling plate 10 is connected to the outlet cooling medium pipeline 50; the second liquid cooling interface 111 on the last liquid cooling plate 10 among the multiple liquid cooling plates 10 is connected to the third liquid cooling interface 120 through a connecting elbow 30.

[0042] In one embodiment, the aperture of the first through hole 112 on each liquid cooling plate 10 may be the same as the aperture of the second through hole 122 on each liquid cooling plate 10 to ensure that the flow rate of the cooling medium flowing into the liquid cooling plate 10 and the flow rate of the cooling medium flowing out of the liquid cooling plate 10 are the same, thereby ensuring the uniformity of the cooling capacity of the cooling system.

[0043] In one embodiment, referring to Figure 1 The liquid cooling pipeline 20 and / or the cooling medium inlet pipeline 40 and / or the cooling medium outlet pipeline 50 are non-metallic hoses, so that the liquid cooling pipeline 20 and / or the cooling medium inlet pipeline 40 and / or the cooling medium outlet pipeline 50 can be bent and assembled, avoiding the situation where the assembly cannot be performed due to errors in the design process.

[0044] In one embodiment, the second liquid-cooling joint 12 and the first liquid-cooling joint 11 on each liquid-cooling plate 10 are on the same side of the liquid-cooling plate 10 to facilitate the layout of the liquid-cooling pipeline 20; of course, in other embodiments, the second liquid-cooling joint 12 and the first liquid-cooling joint 11 on each liquid-cooling plate 10 may also be on different sides of the liquid-cooling plate 10, which is not limited here.

[0045] In one embodiment, the opposite ends of the liquid cooling pipeline 20 are respectively plugged and locked with the first liquid cooling interface 110 and the second liquid cooling interface 111; the opposite ends of the liquid cooling pipeline 20 are respectively plugged and locked with the third liquid cooling interface 120 and the fourth liquid cooling interface 121. Figure 8 As shown, the opposite ends of the liquid cooling pipe 20 have locking structures; Figure 1When the opposite ends of the liquid cooling pipeline 20 are respectively plugged into and matched with the first liquid cooling interface 110 on one liquid cooling plate 10 and the second liquid cooling interface 111 on another liquid cooling plate 10, the locking structures at the opposite ends of the liquid cooling pipeline 20 are respectively used to lock the connection between the liquid cooling pipeline 20 and the first liquid cooling interface 110 and the second liquid cooling interface 111, thereby realizing secondary locking between the liquid cooling pipeline 20 and the first liquid cooling interface 110 and the second liquid cooling interface 111; when the opposite ends of the liquid cooling pipeline 20 are respectively plugged into and matched with the third liquid cooling interface 120 on one liquid cooling plate 10 and the fourth liquid cooling interface 121 on another liquid cooling plate 10, the locking structures at the opposite ends of the liquid cooling pipeline 20 are respectively used to lock the connection between the liquid cooling pipeline 20 and the third liquid cooling interface 120 and the fourth liquid cooling interface 121, thereby realizing secondary locking between the liquid cooling pipeline 20 and the third liquid cooling interface 120 and the fourth liquid cooling interface 121. Of course, the cooling medium inlet pipeline 40 and the first liquid cooling interface 110 are also connected and locked by means of plug-in fitting and locking, and the locking structure between the cooling medium inlet pipeline 40 and the first liquid cooling interface 110 is the same as the locking structure used for secondary locking of the liquid cooling pipeline 20 and the first liquid cooling interface 110 or the liquid cooling interface; the cooling medium outlet pipeline 50 and the fourth liquid cooling interface 121 are also connected and locked by means of plug-in fitting and locking, and the locking structure between the cooling medium outlet pipeline 50 and the fourth liquid cooling interface 121 is the same as the locking structure used for secondary locking of the liquid cooling pipeline 20 and the first liquid cooling interface 110 or the liquid cooling interface.

[0046] It should be noted that the locking structure on the liquid cooling pipeline 20 can be a locking structure used when two existing pipelines are connected, and its specific structure will not be described here.

[0047] The second aspect of the utility model proposes a battery system, including a battery box and a liquid cooling system of the utility model, wherein a plurality of battery cells (not shown) are arranged in the battery box (not shown), and the number of battery cells corresponds to the number of liquid cooling plates 10, and each liquid cooling plate 10 of the liquid cooling system is used to cool each battery cell. In other words, it can be understood that a single battery cell is cooled by a liquid cooling plate 10, so that different cooling requirements for battery cells in different areas of the battery box can be met, which effectively improves the thermal management efficiency of the battery system and enhances the adaptability of the battery system to the external environment.

[0048] It should be noted that, because the battery cells will generate heat when the battery system is working, the cooling medium inlet pipeline 40 is at the front end of the battery system, and the fluid pressure is high near the liquid cooling pipeline 40, while the fluid pressure is low far from this position. According to the fluid dynamic characteristics, in order to ensure the consistency of the flow rate inside each liquid cooling plate 10 inside the battery system, it is necessary to adjust the size of the first through hole 112 and the second through hole 122 on the first liquid cooling joint 11 and the second liquid cooling joint 12, and increase the diameter of the first through hole 112 and the second through hole 122 in turn according to the distance from the liquid cooling pipeline 40, so as to ensure that the volume of the coolant flowing through each liquid cooling plate 10 is consistent, and the cooling effect of each liquid cooling plate 10 on the battery cells is also consistent, so as to avoid excessive temperature difference of the battery cells, which affects the consistency of the battery cells and thus prolongs the service life of the entire battery system.

[0049] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid cooling system, comprising a plurality of liquid cooling plates, characterized in that: Each of the liquid-cooling plates is provided with a first liquid-cooling joint that is sealed and passes through its respective relative surfaces. The first two ends of the first liquid-cooling joint are provided with a first liquid-cooling interface and a second liquid-cooling interface that are communicated with each other. The first liquid-cooling interface is used to enter the cooling medium, and the second liquid-cooling interface is used to exit the cooling medium. The first liquid-cooling joint is also provided with a first through hole that is communicated with the first liquid-cooling interface and the second liquid-cooling interface. The first through hole is located in the liquid-cooling plate and is communicated with the interior of the liquid-cooling plate. The apertures of the first through holes that are communicated with the interior of each liquid-cooling plate are the same or different or partially the same or partially different. In any two adjacent liquid-cooling plates, the second liquid-cooling interface on one liquid-cooling plate is connected to the first liquid-cooling interface on the other liquid-cooling plate through a liquid-cooling pipeline.

2. The liquid cooling system according to claim 1, characterized in that: The diameter of each of the first through holes gradually increases according to the sequence in which the cooling medium enters each liquid cooling plate.

3. The liquid cooling system according to claim 1, characterized in that: The inner diameters of the first liquid cooling interface and the second liquid cooling interface are the same; the outer diameters of the first liquid cooling interface and the second liquid cooling interface are the same.

4. The liquid cooling system according to claim 1, characterized in that: The opposite ends of the liquid cooling pipeline are respectively plugged into and locked with the first liquid cooling interface and the second liquid cooling interface.

5. The liquid cooling system according to claim 4, characterized in that: The first end of the liquid cooling pipeline and the first liquid cooling interface are secondarily locked by a locking structure arranged on the outer wall of the first end of the liquid cooling pipeline, and the second end of the liquid cooling pipeline and the second liquid cooling interface are secondarily locked by a locking structure arranged on the outer wall of the second end of the liquid cooling pipeline.

6. The liquid cooling system according to claim 1, characterized in that: Each of the liquid-cooling plates is also provided with a second liquid-cooling joint that is sealed and passes through its respective relative surfaces. The opposite ends of the second liquid-cooling joint are provided with a third liquid-cooling interface and a fourth liquid-cooling interface that are communicated with each other. The third liquid-cooling interface is used to enter the cooling medium, and the fourth liquid-cooling interface is used to discharge the cooling medium. The second liquid-cooling joint is also provided with a second through hole that is communicated with the third liquid-cooling interface and the fourth liquid-cooling interface. Each of the second through holes is located in each of the liquid-cooling plates and is communicated with the interior of each of the liquid-cooling plates, and the aperture of each of the second through holes that is communicated with the interior of the liquid-cooling plate is different. In any two adjacent liquid-cooling plates, the third liquid-cooling interface on one liquid-cooling plate is connected to the fourth liquid-cooling interface on the other liquid-cooling plate through a liquid-cooling pipeline; the second liquid-cooling interface on the last liquid-cooling plate among the multiple liquid-cooling plates is connected to the third liquid-cooling interface.

7. The liquid cooling system according to claim 6, characterized in that: The second liquid-cooling joint and the first liquid-cooling joint are arranged on the same side of the liquid-cooling plate; or, the second liquid-cooling joint and the first liquid-cooling joint are arranged on different sides of the liquid-cooling plate.

8. The liquid cooling system according to claim 6, characterized in that: The diameter of each of the second through holes is the same as the diameter of each of the first through holes.

9. The liquid cooling system according to claim 5, characterized in that: The liquid cooling pipeline is a non-metallic hose.

10. A battery system, comprising a battery box and a liquid cooling system as described in any one of claims 1 to 9, wherein a plurality of battery cells are arranged in the battery box, the number of the battery cells corresponds one-to-one to the number of the liquid cooling plates, and each of the liquid cooling plates of the liquid cooling system is used to cool each of the battery cells.

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