Liquid cooling plate for power battery pack and liquid cooling heat management system thereof

Abstract

The utility model relates to a liquid cooling plate for a power battery pack and a liquid cooling heat management system of the liquid cooling plate. The liquid cooling plate comprises a profile plate, ribs are arranged in the profile plate through extrusion forming, a water inlet pipe nozzle is arranged on the left side of the profile plate, a water outlet pipe nozzle is arranged on the right side of the profile plate, and side baffles and cold plate plugs are arranged at the left end and the right end of the profile plate. Comprising a cooling liquid pipeline, the liquid cooling plate for the power battery pack is adopted, a water inlet male head and a water outlet male head are arranged at the two ends of the cooling liquid pipeline respectively, a pipeline tee joint is arranged in the middle of the cooling liquid pipeline, and the pipeline tee joint is connected with a water inlet pipe nozzle and a water outlet pipe nozzle through quick connectors; the device assembly is simple in structure, low in process requirement, low in manufacturing cost and good in heat transfer effect, good contact between the liquid cooling plates and the battery module can be ensured, uniform and consistent flow of flow channels between different liquid cooling plates can be realized, and uniform and consistent temperature of the battery module is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric vehicles, and specifically relates to a liquid cooling plate for a power battery pack and a liquid cooling thermal management system thereof. Background Art

[0002] It is best to keep the temperature of the lithium-ion battery itself in the range of 20~30℃, and it is more comfortable to keep it in the range of 10~40℃. When the temperature of the lithium-ion battery itself is lower than 0℃, it is easy to cause lithium deposition during charging or power reduction during discharge; when the temperature of the lithium-ion battery exceeds 45℃, the cycle life of the lithium-ion battery will drop sharply, and thermal safety temperature may also appear. However, with the popularization and promotion of electric vehicles, consumers have higher and higher requirements for the environment in which electric vehicles are located, and the ambient temperature of -30~55℃ has become a scenario that more and more electric vehicles need to face. At the same time, lithium-ion batteries will also generate a lot of heat during use, which will increase the temperature of the lithium-ion battery itself. In this case, to keep the temperature of the lithium-ion battery in the range of 10~40℃ to ensure the life and safety of the power battery system, it is necessary to achieve this through an efficient thermal management system. Summary of the invention

[0003] The utility model aims to provide a liquid cooling plate for a power battery pack and a liquid cooling thermal management system thereof, so as to solve the above-mentioned problems.

[0004] The purpose of the utility model is achieved as follows: a liquid cooling plate for a power battery pack comprises a profile plate, ribs are arranged inside the profile plate, a water inlet nozzle is arranged on the left side of the profile plate, a water outlet nozzle is arranged on the right side of the profile plate, and side baffles and cold plate plugs are arranged on both left and right ends of the profile plate.

[0005] The profile plate is in the shape of a rectangle.

[0006] The ribs divide the interior of the profile plate into two evenly oriented flow channels, one in the upper direction and the other in the lower direction.

[0007] The side baffles, cold plate plugs, water inlet nozzles and water outlet nozzles are all fixedly connected to the profile plates.

[0008] The side baffle, cold plate plug, water inlet nozzle and water outlet nozzle are all fixed to the profile plate by welding.

[0009] A liquid cooling thermal management system includes a coolant pipeline, which adopts the aforementioned liquid cooling plate for a power battery pack, wherein a water inlet male connector and a water outlet male connector are respectively provided at both ends of the coolant pipeline, a pipeline tee is provided in the middle of the coolant pipeline, and the pipeline tee is connected to the water inlet nozzle and the water outlet nozzle through a quick-plug connector.

[0010] A thermally conductive silicone pad is arranged on the upper side of the liquid cooling plate.

[0011] An elastic element foam is arranged on the lower side of the liquid cooling plate.

[0012] The beneficial effects of the utility model are as follows: the liquid cooling plate of the device has a simple structure, low cost and high assembly efficiency; the upper surface of the liquid cooling plate is a centrally symmetrical figure, which overlaps with the original object after rotating 180° along the center, thus facilitating material and installation management; the assembly structure is simple, the process requirements are low, the manufacturing cost is low and the heat transfer effect is good; good contact between the liquid cooling plate and the battery module can be ensured, and the flow rate of the flow channels between different liquid cooling plates can be uniform and consistent, thereby ensuring the uniform temperature of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram of the decomposition of the liquid cooling plate components of a liquid cooling plate for a power battery pack and a liquid cooling thermal management system thereof.

[0014] Figure 2 The utility model is a schematic diagram of the flow of coolant inside the liquid cooling plate of a liquid cooling plate for a power battery pack and a liquid cooling thermal management system thereof.

[0015] Figure 3 It is a schematic diagram of the assembly of a liquid cooling plate for a power battery pack and a liquid cooling thermal management system thereof of the utility model.

[0016] Figure 4 It is an enlarged schematic diagram of the left side of a liquid cooling plate for a power battery pack and a liquid cooling thermal management system thereof of the utility model.

[0017] Figure 5 It is a front view structural schematic diagram of a liquid cooling plate for a power battery pack and a liquid cooling thermal management system thereof according to the utility model.

[0018] In the figure: 1-1, profile plate 1-2, water inlet nozzle 1-3, water outlet nozzle 1-4, side baffle 1-5, cold plate plug 2, thermal conductive silicone pad 3, elastic element foam 4, quick-connect connector 5, pipeline tee 6, coolant pipeline 7, water inlet male connector 8, water outlet male connector. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings. Example

[0020] like Figure 1-5 As shown, a liquid cooling plate for a power battery pack includes a profile plate 1-1, wherein ribs are arranged inside the profile plate 1-1, a water inlet nozzle 1-2 is arranged on the left side of the profile plate 1-1, a water outlet nozzle 1-3 is arranged on the right side of the profile plate 1-1, and side baffles 1-4 and cold plate plugs 1-5 are arranged on both left and right ends of the profile plate 1-1.

[0021] The profile plate 1 - 1 is in the shape of a rectangle.

[0022] The ribs divide the interior of the profile plate 1 - 1 into two evenly oriented flow channels in the upper and lower directions.

[0023] The side baffle 1-4, the cold plate plug 1-5, the water inlet nozzle 1-2 and the water outlet nozzle 1-3 are all fixedly connected to the profile plate 1-1.

[0024] The side baffle 1-4, the cold plate plug 1-5, the water inlet nozzle 1-2 and the water outlet nozzle 1-3 are all fixed to the profile plate 1-1 by welding.

[0025] A liquid cooling thermal management system includes a coolant pipeline 6, which adopts the aforementioned liquid cooling plate for a power battery pack. The two ends of the coolant pipeline 6 are respectively provided with a water inlet male connector 7 and a water outlet male connector 8. A pipeline tee 5 is provided in the middle of the coolant pipeline 6. The pipeline tee 5 is connected to the water inlet nozzle 1-2 and the water outlet nozzle 1-3 through a quick-plug connector 4.

[0026] A thermally conductive silicone pad 2 is arranged on the upper side of the liquid cooling plate.

[0027] An elastic element foam 3 is arranged on the lower side of the liquid cooling plate.

[0028] When the utility model is in use, the ribs can be used to divide the inside of the profile plate 1-1 into two uniform flow channels in the upper and lower directions. The side baffles 1-4 and the cold plate plugs 1-5 have the function of adjusting the direction of the flow channels, so that the flow channels are in two S-shaped directions, so that the coolant flows evenly, with low pressure drop and high flow rate in the liquid cooling plate; the liquid cooling thermal management system can include a single or multiple liquid cooling plates inside. The coolant enters the cooling liquid pipeline 6 from the water inlet male head 7, and then enters the liquid cooling plate water inlet nozzle 1-2 through the pipeline tee 5 and the quick-plug connector 4. After the coolant flows evenly inside the liquid cooling plate, it flows out from the water outlet nozzle 1-3, and then is collected to the water outlet male head 8 through the cooling liquid pipeline 6, which not only achieves the purpose of cooling or heating the battery module, but also can ensure the uniformity of the battery temperature, meeting the thermal management requirements of the power battery. Example

[0029] like Figure 1-5 As shown, a liquid cooling plate for a power battery pack includes a profile plate 1-1, wherein ribs are arranged inside the profile plate 1-1, a water inlet nozzle 1-2 is arranged on the left side of the profile plate 1-1, a water outlet nozzle 1-3 is arranged on the right side of the profile plate 1-1, and side baffles 1-4 and cold plate plugs 1-5 are arranged on both left and right ends of the profile plate 1-1.

[0030] For better effect, the ribs are arranged by extrusion.

[0031] For better effect, the shape of the profile plate 1-1 is rectangular.

[0032] For better effect, the material of the profile plate 1-1 in this embodiment is preferably aluminum alloy, which can be integrally extruded. This structure has a simple manufacturing process and high structural strength. The heat exchange area between the liquid cooling plate and the heat conducting plate is large. The cavity formed by extrusion serves as a channel for the coolant. After extrusion molding, the CNC machine tool processes the liquid cooling plate mounting ears, liquid cooling plate fixed mounting holes, cold plate plug 1-5 mounting holes and the long strip mounting holes of the fixed side baffle 1-4.

[0033] For better effect, the ribs divide the interior of the profile plate 1 - 1 into two evenly oriented flow channels, one in the upper direction and the other in the lower direction.

[0034] For better effect, the side baffle 1-4, the cold plate plug 1-5, the water inlet nozzle 1-2 and the water outlet nozzle 1-3 are all fixedly connected to the profile plate 1-1.

[0035] For better effect, the side baffle 1-4, the cold plate plug 1-5, the water inlet nozzle 1-2 and the water outlet nozzle 1-3 are all fixed to the profile plate 1-1 by welding.

[0036] For better effect, the welding method used is preferably argon arc welding.

[0037] For better effect, the side baffles 1-4 and the cold plate plugs 1-5 are aluminum alloy parts processed by CNC machine tools with the same size. The profile plate 1-1 is provided with long mounting holes for fixing the side baffles 1-4 and the cold plate plugs 1-5. After the side baffles 1-4 and the cold plate plugs 1-5 are installed in place, they are fixedly welded to the profile plate 1-1 by argon arc welding. When the coolant enters the profile plate 1-1, the side baffles 1-4 and the cold plate plugs 1-5 guide the direction of the coolant to achieve attachment. Figure 2 The diagram shows the S-shaped flow of the coolant in different flow paths.

[0038] A liquid cooling thermal management system includes a coolant pipeline 6, which adopts the aforementioned liquid cooling plate for a power battery pack. The two ends of the coolant pipeline 6 are respectively provided with a water inlet male connector 7 and a water outlet male connector 8. A pipeline tee 5 is provided in the middle of the coolant pipeline 6. The pipeline tee 5 is connected to the water inlet nozzle 1-2 and the water outlet nozzle 1-3 through a quick-plug connector 4.

[0039] For better effect, when the liquid cooling thermal management system contains multiple liquid cooling plates, in order to ensure the consistent distribution of coolant volume flow between different liquid cooling plates, the inner diameter of the water inlet nozzle 1-2 and the water outlet nozzle 1-3 of each liquid cooling plate can be adjusted. The water inlet nozzle 1-2 and the water outlet nozzle 1-3 are aluminum alloy parts processed by CNC machine tools. By adjusting the inner diameter dimensions of the water inlet nozzle 1-2 and the water outlet nozzle 1-3 on different liquid cooling plates and performing CFD simulation iterative calculation simulation, the volume flow distribution uniformity between different liquid cooling plates is made consistent, thereby achieving the purpose of reducing the temperature difference between all battery modules.

[0040] For better effect, a thermally conductive silicone pad 2 is provided on the upper side of the liquid cooling plate to achieve heat conduction between the battery module and the liquid cooling thermal management system, making the liquid cooling thermal management system simple and easy to assemble.

[0041] For better effect, an elastic element foam 3 is arranged on the lower side of the liquid cooling plate. When the battery module is placed on the liquid cooling plate assembly, the elastic element foam 3 is pressed tightly. The elastic force generated and the pressure of the battery module on the thermal conductive silicone pad 2 can squeeze out the bubbles in the thermal conductive silicone pad 2, thereby reducing the generation of thermal resistance. In addition, the elastic element foam 3 has a smaller thermal conductivity coefficient, which can achieve a certain thermal insulation effect.

[0042] For better effect, the water inlet male connector 7 and the water outlet male connector 8 adopt different connector standards to achieve the purpose of error prevention.

[0043] When the utility model is in use, the ribs formed by extrusion can be divided into two uniform flow channels in the upper and lower directions inside the profile plate 1-1. The side baffles 1-4 and the cold plate plugs 1-5 have the function of adjusting the direction of the flow channels, so that the flow channels are in two S-shaped directions, so that the coolant flows evenly, with low pressure drop and high flow rate in the liquid cooling plate; the liquid cooling thermal management system can include a single or multiple liquid cooling plates inside. The coolant enters the cooling liquid pipeline 6 from the water inlet male head 7, and then enters the liquid cooling plate water inlet nozzle 1-2 through the pipeline tee 5 and the quick-plug connector 4. After the coolant flows evenly inside the liquid cooling plate, it flows out from the water outlet nozzle 1-3, and then is collected to the water outlet male head 8 through the cooling liquid pipeline 6, which not only achieves the purpose of cooling or heating the battery module, but also can ensure the uniformity of the battery temperature, meeting the thermal management requirements of the power battery. The liquid cooling plate of the device has a simple structure, low cost and high assembly efficiency. The upper surface of the liquid cooling plate is a centrally symmetrical figure. After rotating 180° along the center, it coincides with the original object position, which is convenient for material and installation management. The assembly structure is simple, the process requirements are low, the manufacturing cost is low, and the heat transfer effect is good. It can ensure good contact between the liquid cooling plate and the battery module, and can achieve uniform flow consistency in the flow channels between different liquid cooling plates, thereby ensuring the uniform temperature of the battery module.

Claims

1. A liquid cooling plate for a power battery pack, comprising a profile plate, characterized in that: The profile plate is provided with ribs inside, a water inlet nozzle is provided on the left side of the profile plate, a water outlet nozzle is provided on the right side of the profile plate, and side baffles and cold plate plugs are provided at both left and right ends of the profile plate.

2. A liquid cooling plate for a power battery pack according to claim 1, characterized in that: The profile plate is in the shape of a rectangle.

3. The liquid cooling plate for a power battery pack according to claim 1, characterized in that: The ribs divide the interior of the profile plate into two evenly oriented flow channels, one in the upper direction and the other in the lower direction.

4. The liquid cooling plate for a power battery pack according to claim 1, characterized in that: The side baffles, cold plate plugs, water inlet nozzles and water outlet nozzles are all fixedly connected to the profile plates.

5. The liquid cooling plate for a power battery pack according to claim 4, characterized in that: The side baffle, cold plate plug, water inlet nozzle and water outlet nozzle are all fixed to the profile plate by welding.

6. A liquid cooling thermal management system, comprising a cooling liquid pipeline, using the liquid cooling plate for a power battery pack according to any one of claims 1 to 4, characterized in that: The two ends of the coolant pipeline are respectively provided with a water inlet male head and a water outlet male head, and the middle part of the coolant pipeline is provided with a pipeline tee, and the pipeline tee is connected to the water inlet nozzle and the water outlet nozzle through a quick plug connector.

7. A liquid cooling thermal management system according to claim 6, characterized in that: A thermally conductive silicone pad is arranged on the upper side of the liquid cooling plate.

8. The liquid cooling thermal management system according to claim 6, characterized in that: An elastic element foam is arranged on the lower side of the liquid cooling plate.

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