Multi-runner double-sided heat dissipation liquid cooling plate structure

Abstract

The utility model relates to the technical field of battery pack liquid cooling plates, in particular to a multi-runner double-face heat dissipation liquid cooling plate structure which comprises a runner plate, an upper cover plate arranged on the upper end face of the runner plate and a lower cover plate arranged on the lower end face of the runner plate. A flow inlet and a flow outlet are formed in the two ends of the flow channel respectively, a liquid inlet corresponding to the flow inlet is formed in the upper cover plate, a liquid outlet corresponding to the flow outlet is formed in the upper cover plate, a liquid input assembly is arranged at the liquid inlet and communicated with the flow inlet, and a liquid output assembly is arranged at the liquid outlet and communicated with the flow outlet. According to the double-sided heat dissipation liquid cooling plate structure, the uniformity is better, the flow resistance is lower, the upper cover plate and the lower cover plate can be used for battery heat dissipation, a battery adopting the structure is uniform in heat dissipation, the heat dissipation area is doubled, and the heat dissipation efficiency is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack liquid cooling plate technology, specifically to a multi-channel double-sided heat dissipation liquid cooling plate structure. Background Technology

[0002] Currently, driven by the energy and environmental crisis, the development of new energy is gaining momentum. Major automakers are investing significant resources in the rapid development of new energy vehicles. As a core component of new energy vehicles, the battery pack's lifespan, range, and heat dissipation performance are closely related. There are two common cooling methods for battery packs: liquid cooling and air cooling. Liquid cooling, as the primary heat dissipation method, has advantages such as high heat dissipation efficiency and small footprint. The liquid cooling plate directly affects the temperature uniformity and heat dissipation of the battery pack. To ensure the battery pack operates safely and efficiently within a suitable temperature range, it is necessary to consider improving the utilization rate and heat dissipation efficiency of the liquid cooling plate. Currently, most liquid cooling plates on the market primarily use single-sided cooling, failing to maximize the utilization rate and heat dissipation efficiency. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a multi-channel double-sided heat dissipation liquid cooling plate structure. This double-sided heat dissipation liquid cooling plate structure is novel and ingeniously designed. When the medium flows inside the channels, the multiple channels make it more uniform and the flow resistance is lower. Moreover, both the upper and lower cover plates can dissipate heat from the battery. The battery heat dissipation using this structure is uniform, the heat dissipation area is doubled, the heat dissipation efficiency is significantly improved, the space occupied by the liquid cooling plate is reduced, and the overall weight of the battery pack cooling plate in the vehicle is reduced.

[0004] The objective of this utility model is achieved through the following technical solution: a multi-channel double-sided heat dissipation liquid cooling plate structure, including a channel plate, an upper cover plate disposed on the upper surface of the channel plate, and a lower cover plate disposed on the lower surface of the channel plate. The channel plate has a plurality of channels penetrating the upper and lower surfaces of the channel plate. The two ends of the channels are respectively provided with inlet and outlet. The upper cover plate is provided with a liquid inlet corresponding to the inlet and a liquid outlet corresponding to the outlet. A liquid input component is provided at the liquid inlet and is connected to the inlet. A liquid output component is provided at the liquid outlet and is connected to the outlet.

[0005] Furthermore, the flow channel plate is provided with a baffle plate that divides the flow channel plate into multiple flow channels.

[0006] Furthermore, the flow channel includes a first flow channel, a second flow channel, and a third flow channel, wherein the first flow channel, the second flow channel, and the third flow channel share a common inlet and a common outlet.

[0007] Furthermore, the first and second flow channels are respectively provided with multiple flow dividers for enhancing fluid disturbance at positions near their corresponding outlets, and the flow dividers are longitudinally arranged in the corresponding flow channels.

[0008] Furthermore, the connection between the liquid input component and the inlet is provided with a plug-in portion.

[0009] Furthermore, the connection between the liquid output component and the outlet is provided with a plug-in portion.

[0010] Furthermore, the liquid input component and the mounting point of the liquid inlet are provided with a circumferential locking element and a circumferential positioning groove.

[0011] Furthermore, the liquid output assembly and the outlet are provided with a circumferential locking element and a circumferential positioning groove.

[0012] The beneficial effects of this utility model are as follows: The double-sided heat dissipation liquid cooling plate of this utility model has a novel structure and ingenious design. When the medium flows inside the flow channel, the multiple flow channels make it more uniform and the flow resistance is lower. Moreover, both the upper and lower cover plates can dissipate heat from the battery. The battery with this structure has uniform heat dissipation, the heat dissipation area is doubled, the heat dissipation efficiency is significantly improved, the space occupied by the liquid cooling plate is reduced, and the overall weight of the battery pack cooling plate is reduced. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention;

[0014] Figure 2 This is a first exploded view of the present invention;

[0015] Figure 3 This is a second exploded view of the present invention;

[0016] Figure 4 This is a second exploded view of the present invention;

[0017] Figure 5 This is a schematic diagram of the flow channel plate of this utility model;

[0018] Figure 6 This is a schematic diagram of the liquid input component of this utility model.

[0019] The attached figures are labeled as follows: 1-flow channel plate, 11-first flow channel, 12-second flow channel, 13-baffle plate, 14-diverter plate, 15-inlet, 16-outlet, 17-third flow channel, 2-upper cover plate, 21-liquid inlet, 22-liquid outlet, 3-lower cover plate, 4-liquid input assembly, 41-plug-in part, 42-circumferential locking part, 43-circumferential positioning groove, 5-liquid output assembly. Detailed Implementation

[0020] To facilitate understanding by those skilled in the art, the following description is provided in conjunction with embodiments and appendices. Figure 1-6 The present invention will be further described below. The content mentioned in the embodiments is not intended to limit the present invention.

[0021] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0022] When a component is said to be "connected to" another component, it can be directly connected to the other component or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and 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 this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0026] See Figure 1-6 A multi-channel double-sided heat dissipation liquid cooling plate structure includes a channel plate 1, an upper cover plate 2 disposed on the upper end face of the channel plate 1, and a lower cover plate 3 disposed on the lower end face of the channel plate 1. The channel plate 1 has a plurality of channels penetrating the upper and lower surfaces of the channel plate 1. The two ends of the channels are respectively provided with inlet 15 and outlet 16. The upper cover plate 2 is provided with a liquid inlet 21 corresponding to the inlet 15 and a liquid outlet 22 corresponding to the outlet 16. A liquid input component 4 is provided at the liquid inlet 21 and is connected to the inlet 15. A liquid output component 5 is provided at the liquid outlet 22 and is connected to the outlet 16.

[0027] In this embodiment, the double-sided heat dissipation liquid cooling plate has a novel and ingenious design. When the medium flows inside the flow channel, the multiple flow channels make it more uniform and the flow resistance is lower. Both the upper cover plate 2 and the lower cover plate 3 can dissipate heat from the battery. The battery with this structure has uniform heat dissipation, the heat dissipation area is doubled, the heat dissipation efficiency is significantly improved, the space occupied by the liquid cooling plate is reduced, and the overall weight of the battery pack cooling plate is reduced.

[0028] In this embodiment, the flow channel plate 1 is provided with a baffle plate 13 that divides the flow channel plate 1 into multiple flow channels.

[0029] In this embodiment, the flow channels include a first flow channel 11, a second flow channel 12, and a third flow channel 17. The first flow channel 11, the second flow channel 12, and the third flow channel 17 share a common inlet 15, and the first flow channel 11, the second flow channel 12, and the third flow channel 17 share a common outlet 16.

[0030] In this embodiment, the first flow channel 11 and the second flow channel 12 are respectively provided with a plurality of flow divider baffles 14 for enhancing fluid disturbance at positions close to the corresponding outlet 16, and the flow divider baffles 14 are arranged longitudinally in the corresponding flow channels.

[0031] The beneficial effects of the above-mentioned technical solution in the double-sided heat dissipation liquid cooling plate structure in this embodiment are as follows: Cooling water enters from the liquid input component 4 and flows into the corresponding flow channel through the inlet 15. After convective heat exchange in the first flow channel 11 and the second flow channel 12, the cooling water is discharged from the outlet 16. Since the temperature of the cooling water gradually increases with the flow, the highest temperature usually occurs in the middle to rear position. A flow divider 14 is set at the outlet position corresponding to the first flow channel 11 and the second flow channel 12 to enhance the disturbance of the heat dissipation fluid and reduce the probability of eddy current generation, thereby further improving the convective heat exchange efficiency at the outlet position and improving the phenomenon of uneven temperature. This technical solution divides the flow channel plate 1 into two channels through the baffle 13. After passing through the divided channels, the flow velocity of the cooling water is increased to a certain extent. Compared with single-pass flow, it has a higher cooling efficiency, allowing the cooling water and the external heat-generating area to fully convect and dissipate heat.

[0032] In this embodiment, the liquid input component 4 is provided with a plug-in part 41 at the connection between it and the inlet 15. The plug-in part 41 is inserted into the inlet 15 and communicates with the inlet 15. The liquid output component 5 is provided with a plug-in part 41 at the connection between it and the outlet 16. The plug-in part 41 is inserted into the outlet 16 and communicates with the outlet 16.

[0033] In this embodiment, the liquid input component 4 is provided with a circumferential locking member 42 and a circumferential positioning groove 43 at the mounting location of the liquid inlet 21; the liquid output component 5 is provided with a circumferential locking member 42 and a circumferential positioning groove 43 at the mounting location of the outlet 16.

[0034] In this embodiment, the liquid input component 4 and the liquid output component 5 are welded to the liquid inlet 21 and liquid outlet 22 of the upper cover plate 2 respectively by laser welding and brazing. Then, the upper cover plate 2, the flow channel plate 1, and the lower cover plate 3 are all brazed together. After completing the above process, a series of basic sample tests will be performed, such as airtightness test, high temperature resistance test, low temperature resistance test, thermal cycling test, and salt spray test, to verify its reliability, as follows:

[0035] Gas test: After the double-sided heat dissipation liquid cooling plate structure is processed, connect the airtight equipment, introduce a certain pressure (250kPa) of gas, pressurize for 60s, hold pressure for 40s, test for 60s, depressurize for 30s, and test the system leakage rate is less than 60Pa.

[0036] Pressure drop: A 50% ethylene glycol aqueous solution was introduced into the liquid cooling plate at a temperature of 20°C and a flow rate of 9 L / min. The pressure drop at the inlet and outlet of the liquid cooling plate was measured to be less than 20 kPa.

[0037] Temperature shock: The test medium is 50% / 50% water / ethylene glycol coolant; in an alternating temperature environment from (-40±2)℃ to (85±2)℃, the transition time between extreme temperatures is required to be less than 30 min. The cold plate is kept in each extreme temperature environment for 8 h, and the cycle is repeated 5 times. After the test, the sample is free from damage and appearance deformation.

[0038] Salt spray test: After the test, the sample surface should show no blistering or wrinkling, and slight discoloration and loss of gloss are permissible, meeting the insulation requirements; the sample surface should show no obvious rust spots or corrosion, indicating normal operation and no loss of electrical performance. There should be no damage or deformation.

[0039] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.

Claims

1. A multi-channel double-sided heat dissipation liquid cooling plate structure, characterized in that: The device includes a flow channel plate, an upper cover plate disposed on the upper surface of the flow channel plate, and a lower cover plate disposed on the lower surface of the flow channel plate. The flow channel plate has a plurality of flow channels penetrating the upper and lower surfaces of the flow channel plate. Each end of the flow channel has an inlet and an outlet. The upper cover plate has a liquid inlet corresponding to the inlet and a liquid outlet corresponding to the outlet. A liquid input component is provided at the liquid inlet and is connected to the inlet. A liquid output component is provided at the liquid outlet and is connected to the outlet.

2. The multi-channel double-sided heat dissipation liquid cooling plate structure according to claim 1, characterized in that: The flow channel plate is provided with a baffle plate that divides the flow channel plate into multiple flow channels.

3. A multi-channel double-sided heat dissipation liquid cooling plate structure according to claim 1 or 2, characterized in that: The flow channels include a first flow channel, a second flow channel, and a third flow channel. The first flow channel, the second flow channel, and the third flow channel share a common inlet and a common outlet.

4. The multi-channel double-sided heat dissipation liquid cooling plate structure according to claim 3, characterized in that: The first and second flow channels are respectively provided with multiple flow dividers to enhance fluid disturbance at the corresponding outlet positions, and the flow dividers are arranged longitudinally in the corresponding flow channels.

5. The multi-channel double-sided heat dissipation liquid cooling plate structure according to claim 1, characterized in that: The connection between the liquid input component and the inlet is provided with a plug-in part.

6. The multi-channel double-sided heat dissipation liquid cooling plate structure according to claim 1, characterized in that: The liquid output component is provided with a plug-in part at the connection between the outlet and the flow outlet.

7. The multi-channel double-sided heat dissipation liquid cooling plate structure according to claim 1, characterized in that: The liquid input component and the inlet are provided with a circumferential locking element and a circumferential positioning groove.

8. The multi-channel double-sided heat dissipation liquid cooling plate structure according to claim 1, characterized in that: The liquid output component and the outlet are provided with a circumferential locking element and a circumferential positioning groove.

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