Large liquid cooling plate with multiple flow channels connected in parallel

Abstract

The utility model discloses a multi-runner parallel connection large liquid cooling plate, and relates to the technical field of liquid cooling plates. The die comprises an upper base plate, a lower runner plate and a module fixing beam, the upper base plate is fixedly connected with the module fixing beam, a middle cavity of the lower runner plate is a runner, and a stamping runner and a turbulent flow device are arranged on the surface of the lower runner plate. The stamping flow channel comprises an inlet flow collecting area, a low-density heat dissipation area, a tail flow collecting area, a high-density heat dissipation area, an outlet uniform temperature area and an outlet flow collecting area which are communicated in sequence, the lower flow channel plate is provided with a heat dissipation area A and a heat dissipation area B, and the low-density heat dissipation area, the tail flow collecting area, the high-density heat dissipation area and the outlet uniform temperature area are the heat dissipation area A and the heat dissipation area B; the flow channel density and the series-parallel connection mode of the flow channels are reasonably arranged, the heat exchange area and the heat exchange temperature are reasonably designed, the difference of the heat exchange capacity of the battery cells and the liquid cooling plate is reduced, the temperature difference between the battery cells and the highest temperature of the battery cells are effectively reduced, and the service life of the battery cells is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling plates, in particular to a multi-channel parallel large liquid cooling plate. Background Technique

[0002] A liquid cooling plate is a device for heat dissipation. It introduces water or other cooling media into the system and uses the media to absorb and carry away the heat of the device to achieve the effect of heat dissipation. When used in energy storage battery packs, cooling is often required. Temperature has a great impact on the performance and consistency of battery cells. Temperature difference will affect the DC internal resistance, and there are differences in heat generation consistency; the charge and discharge capacity is different at different temperatures. When the temperature difference increases, the charge and discharge rate is limited. Therefore, how to reduce the temperature difference in the thermal management of the liquid cooling plate is an urgent problem to be solved. It is necessary to reasonably design the heat exchange area and heat exchange temperature to reduce the difference in the heat exchange capacity between the battery cells and the liquid cooling plate, so as to reduce the temperature difference between the battery cells and the highest temperature of the battery cells. Content of the Utility Model

[0003] In order to solve the problem of the temperature difference of the liquid cooling plate; the purpose of the utility model is to provide a multi-channel parallel large liquid cooling plate.

[0004] To solve the above technical problems, the present utility model adopts the following technical solutions: A multi-channel parallel large liquid cooling plate, comprising an upper substrate, a downstream channel plate, and a module fixing beam. The upper substrate and the downstream channel plate are welded by brazing. The upper substrate and the module fixing beam are fixedly connected. The middle cavity of the downstream channel plate is a channel. The surface of the downstream channel plate is provided with a stamping channel and a flow disturbing device. The stamping channel includes an inlet manifold area, a low-density heat dissipation area, a tail manifold area, a high-density heat dissipation area, an outlet temperature equalization area, and an outlet manifold area that are sequentially connected. The downstream channel plate is provided with a heat dissipation area A and a heat dissipation area B. The low-density heat dissipation area, the tail manifold area, the high-density heat dissipation area, and the outlet temperature equalization area are the heat dissipation area A and the heat dissipation area B. The temperature of the cooling medium can be mixed through the outlet temperature equalization area to avoid large temperature differences. The cooling medium enters the inlet manifold area for collection and then enters the low-density heat dissipation area. The temperature of the cooling medium is relatively low at the front end of the channel compared to the outlet. The relatively sparse channels reduce the heat transfer amount at the front end of the liquid cooling plate channels. After passing through the low-density heat dissipation area, the cooling medium enters the tail manifold area for collection and then enters the high-density heat dissipation area. The temperature of the coolant is relatively high after being heated by the battery cells on the front-end channels. The channels in the high-density heat dissipation area are arranged densely to increase the channel density. The concave structure of the flow disturbing device is used to disturb the fluid flow and improve the heat dissipation effect in the tail manifold area and the high-density heat dissipation area. In this way, the heat transfer amounts at the front and rear ends of the channels are effectively balanced, and the temperature difference of the battery pack is reduced. The actual channel heat transfer area of the low-density heat dissipation area is smaller than that of the high-density heat dissipation area, which can facilitate controlling the temperature between the low-density heat dissipation area and the high-density heat dissipation area to be consistent. One side of the upper substrate is provided with an inlet water nozzle and an outlet water nozzle, which respectively correspond to the inlet manifold area and the outlet manifold area. The cooling medium can enter the inlet manifold area and be discharged from the outlet manifold area conveniently through the inlet water nozzle and the outlet water nozzle. The flow disturbing device is of a concave structure and is respectively arranged in the tail manifold area and the high-density heat dissipation area. The concave structure is used to disturb the fluid flow and improve the heat dissipation effect.

[0005] Preferably, the low-density heat dissipation area includes a low-density heat dissipation area a flow channel and a low-density heat dissipation area b flow channel. The low-density heat dissipation area a flow channel includes a low-density heat dissipation area a first flow channel, a low-density heat dissipation area a second flow channel, and a low-density heat dissipation area a third flow channel which are distributed in sequence. The low-density heat dissipation area b flow channel includes a low-density heat dissipation area b first flow channel, a low-density heat dissipation area b second flow channel, and a low-density heat dissipation area b third flow channel which are distributed in sequence. Since the low-density heat dissipation area is located at the front end of the entire flow channel, the temperature of the coolant is relatively low at the outlet, and the flow channels are relatively sparse. By reducing the flow channel density, the heat exchange amount at the front end of the liquid cooling plate flow channel is reduced. The high-density heat dissipation area is located at the rear end of the entire flow channel. After the coolant is heated by the battery cells above the front-end flow channels, the temperature is relatively high. Therefore, the flow channels are arranged more densely. By increasing the flow channel density, the heat exchange amount at the rear end of the liquid cooling plate flow channel is increased. Through the design of the flow channel density, the heat exchange amounts at the front end and the rear end of the flow channel are effectively balanced, and the temperature difference of the battery pack is reduced. The density of the low-density heat dissipation area a third flow channel and the low-density heat dissipation area b third flow channel is higher than that of the low-density heat dissipation area a second flow channel and the low-density heat dissipation area b second flow channel. Since the low-density heat dissipation area a third flow channel and the low-density heat dissipation area a second flow channel are close to the high-density heat dissipation area at the rear end of the flow channel and the temperature is relatively high, the heat exchange amount of the liquid cooling plate is balanced in this way, and the system temperature difference is reduced. The low-density heat dissipation area a flow channel and the low-density heat dissipation area b flow channel adopt a parallel design, which can effectively solve the problem of large temperature difference between the front end and the rear end of the liquid cooling plate. The low-density heat dissipation area a flow channel further includes a low-density heat dissipation area a fourth flow channel, and the low-density heat dissipation area a fourth flow channel is adjacent to the high-density heat dissipation area. Since the temperature of the low-density heat dissipation area a fourth flow channel at the front end of the flow channel is relatively low and it is arranged beside the high-density heat dissipation area with a relatively high temperature, it is to reduce the temperature of the heat dissipation area A and the heat dissipation area B close to the high-density heat dissipation area.

[0006] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0007] By reasonably setting the flow channel density and the series-parallel form of the flow channels, the difference in the heat exchange capacity between the battery cells and the liquid cooling plate is reasonably designed from the heat exchange area and the heat exchange temperature, effectively reducing the temperature difference between the battery cells and the highest temperature of the battery cells, which is beneficial to extending the service life of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0009] Figure 1 It is a schematic structural diagram of the present utility model.

[0010] Figure 2 This is a schematic structural diagram of the downstream channel plate of the present utility model.

[0011] Figure 3 This is a schematic top view of the structural diagram of the downstream channel plate of the present utility model.

[0012] In the figure: 10, inlet water nozzle; 11, outlet water nozzle; 12, upper substrate; 13, stamping flow channel; 14, downstream channel plate; 15, module fixing beam; 16, inlet current collection area; 17, low-density heat dissipation area A flow channel; 171, low-density heat dissipation area A first flow channel; 172, low-density heat dissipation area A second flow channel; 173, low-density heat dissipation area A third flow channel; 18, low-density heat dissipation area; 19, low-density heat dissipation area B flow channel; 191, low-density heat dissipation area B first flow channel; 192, low-density heat dissipation area B second flow channel; 193, low-density heat dissipation area B third flow channel; 20, tail current collection area; 21, flow disturbance device; 22, high-density heat dissipation area; 23, low-density heat dissipation area A fourth flow channel; 24, outlet temperature equalization area; 25, outlet current collection area; 26, heat dissipation area A; 27, heat dissipation area B. Specific embodiments

[0013] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0014] Embodiment: As Figures 1-3As shown in the figure, the utility model provides a multi-channel parallel large liquid cooling plate, which includes an upper substrate 12, a downstream channel plate 14 and a module fixing beam 15. The upper substrate 12 and the downstream channel plate 14 are welded by brazing. There is a fixed connection between the upper substrate 12 and the module fixing beam 15. The middle cavity of the downstream channel plate 14 is a channel. The surface of the downstream channel plate 14 is provided with a stamping channel 13 and a flow disturbance device 21. The stamping channel 13 includes an inlet manifold area 16, a low-density heat dissipation area 18, a tail manifold area 20, a high-density heat dissipation area 22, an outlet temperature equalization area 24, and an outlet manifold area 25 that are connected in sequence. The downstream channel plate 14 is provided with a heat dissipation area A26 and a heat dissipation area B27. The low-density heat dissipation area 18, the tail manifold area 20, the high-density heat dissipation area 22, and the outlet temperature equalization area 24 are the heat dissipation area A26 and the heat dissipation area B27. The temperature of the cooling medium can be mixed through the outlet temperature equalization area 24 to avoid large temperature differences. The cooling medium enters the inlet manifold area 16 for collection and then enters the low-density heat dissipation area 18. The temperature of the cooling medium is relatively lower at the inlet than at the outlet. The relatively sparse flow channels reduce the heat transfer amount at the front end of the liquid cooling plate flow channels. After passing through the low-density heat dissipation area 18, the cooling medium enters the tail manifold area 20 for collection and then enters the high-density heat dissipation area 22. The temperature of the coolant is relatively high after being heated by the battery cells on the front-end flow channels. The flow channels in the high-density heat dissipation area 22 are arranged densely to increase the flow channel density. The concave structure of the flow disturbance device 21 is used to disturb the fluid flow to improve the heat dissipation effect of the tail manifold area 20 and the high-density heat dissipation area 22. In this way, the heat transfer amounts at the front end and the rear end of the flow channels are effectively balanced, and the temperature difference of the battery pack is reduced. The actual flow channel heat transfer area of the low-density heat dissipation area 18 is smaller than that of the high-density heat dissipation area 22. In this way, it is convenient to control the temperatures of the low-density heat dissipation area 18 and the high-density heat dissipation area 22 to be consistent. One side of the upper substrate 12 is provided with an inlet water nozzle 10 and an outlet water nozzle 11. The inlet water nozzle 10 and the outlet water nozzle 11 correspond to the inlet manifold area 16 and the outlet manifold area 25 respectively. The cooling medium can enter the inlet manifold area 16 and be discharged from the outlet manifold area 25 conveniently through the inlet water nozzle 10 and the outlet water nozzle 11. The flow disturbance device 21 is of a concave structure. The flow disturbance devices 21 are respectively arranged in the tail manifold area 20 and the high-density heat dissipation area 22. The concave structure is used to disturb the fluid flow and improve the heat dissipation effect.

[0015] The low-density heat dissipation area 18 includes a low-density heat dissipation area a flow channel 17 and a low-density heat dissipation area b flow channel 19. The low-density heat dissipation area a flow channel 17 includes a low-density heat dissipation area a first flow channel 171, a low-density heat dissipation area a second flow channel 172, and a low-density heat dissipation area a third flow channel 173 that are sequentially distributed. The low-density heat dissipation area b flow channel 19 includes a low-density heat dissipation area b first flow channel 191, a low-density heat dissipation area b second flow channel 192, and a low-density heat dissipation area b third flow channel 193 that are sequentially distributed. Since the low-density heat dissipation area 18 is located at the front end of the entire flow channel, the temperature of the coolant is relatively low at the outlet, and the flow channels are relatively sparse. By reducing the flow channel density, the heat transfer amount at the front end of the liquid cooling plate flow channel is reduced. The high-density heat dissipation area 22 is located at the rear end of the entire flow channel. After the coolant is heated by the battery cells above the front-end flow channels, the temperature is relatively high. Therefore, the flow channels are set to be relatively dense. By increasing the flow channel density, the heat transfer amount at the rear end of the liquid cooling plate flow channel is increased. Through the design of the flow channel density, the heat transfer amounts at the front and rear ends of the flow channel are effectively balanced, and the temperature difference of the battery pack is reduced. The density of the low-density heat dissipation area a third flow channel 173 and the low-density heat dissipation area b third flow channel 193 is higher than that of the low-density heat dissipation area a second flow channel 172 and the low-density heat dissipation area b second flow channel 192. Since the low-density heat dissipation area a third flow channel 173 and the low-density heat dissipation area a second flow channel 172 are close to the high-density heat dissipation area 22 at the rear end of the flow channel and the temperature is relatively high, the heat transfer amount of the liquid cooling plate is balanced in this way, and the system temperature difference is reduced. The low-density heat dissipation area a flow channel 17 and the low-density heat dissipation area b flow channel 19 adopt a parallel design, which can effectively solve the problem of a large temperature difference between the front and rear ends of the liquid cooling plate. The low-density heat dissipation area a flow channel 17 further includes a low-density heat dissipation area a fourth flow channel 23. The low-density heat dissipation area a fourth flow channel 23 is adjacent to the high-density heat dissipation area 22. Since the low-density heat dissipation area a fourth flow channel 23 is located at the front end of the flow channel and the temperature is relatively low, it is arranged beside the high-density heat dissipation area 22 with a relatively high temperature in order to reduce the temperature of the heat dissipation area A26 and the heat dissipation area B27 close to the high-density heat dissipation area 22.

[0016] Working principle: First, the cooling medium enters and converges in the inlet manifold area 16 from the inlet water nozzle 10, and then sequentially enters the low-density heat dissipation area a flow channel 17 and the low-density heat dissipation area b flow channel 19. The temperature of the cooling medium is relatively low at the outlet. The flow channels are relatively sparse. By reducing the flow channel density, the heat transfer amount at the front end of the liquid cooling plate flow channel is reduced. After passing through the low-density heat dissipation area a flow channel 17 and the low-density heat dissipation area b flow channel 19, the cooling medium enters the tail manifold area 20 for convergence, and then enters the high-density heat dissipation area 22. After being heated by the battery cells on the front-end flow channels, the temperature of the coolant is relatively high. The flow channels in the high-density heat dissipation area 22 are arranged densely. By increasing the flow channel density, the heat transfer amounts at the front end and the rear end of the flow channels are effectively balanced, and the temperature difference of the battery pack is reduced. The concave structure of the flow disturbance device 21 is used to disturb the fluid flow to improve the heat dissipation effect of the tail manifold area 20 and the high-density heat dissipation area 22. The cooling medium passes through and enters the outlet temperature equalization area 24 to mix the temperature of the cooling medium to avoid a large temperature difference, and then enters the outlet manifold area 25 for convergence. Finally, it is discharged from the outlet water nozzle 11.

[0017] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these changes and modifications.

Claims

1. A multi-channel parallel large liquid cooling plate, comprising an upper substrate (12), a downstream channel plate (14) and a module fixing beam (15), characterized in that: The upper substrate (12) and the downstream channel plate (14) are welded by brazing. A fixed connection is established between the upper substrate (12) and the module fixed beam (15). The middle cavity of the downstream channel plate (14) serves as a flow channel. The surface of the downstream channel plate (14) is provided with a stamping flow channel (13) and a flow disturbance device (21). The stamping flow channel (13) includes an inlet manifold area (16), a low-density heat dissipation area (18), a tail manifold area (20), a high-density heat dissipation area (22), an outlet temperature equalization area (24), and an outlet manifold area (25) that are connected in sequence. The downstream channel plate (14) is provided with a heat dissipation area A (26) and a heat dissipation area B (27). The low-density heat dissipation area (18), the tail manifold area (20), the high-density heat dissipation area (22), and the outlet temperature equalization area (24) are the heat dissipation area A (26) and the heat dissipation area B (27).

2. The multi-channel parallel large liquid cooling plate according to claim 1, characterized in that, The low-density heat dissipation area (18) includes a low-density heat dissipation a area flow channel (17) and a low-density heat dissipation b area flow channel (19). The low-density heat dissipation a area flow channel (17) includes a low-density heat dissipation a area first flow channel (171), a low-density heat dissipation a area second flow channel (172), and a low-density heat dissipation a area third flow channel (173) that are distributed in sequence. The low-density heat dissipation b area flow channel (19) includes a low-density heat dissipation b area first flow channel (191), a low-density heat dissipation b area second flow channel (192), and a low-density heat dissipation b area third flow channel (193) that are distributed in sequence.

3. The multi-channel parallel large liquid cooling plate according to claim 1, characterized in that, An inlet water nozzle (10) and an outlet water nozzle (11) are provided on one side of the upper substrate (12). The inlet water nozzle (10) and the outlet water nozzle (11) correspond to the inlet manifold area (16) and the outlet manifold area (25) respectively.

4. The multi-channel parallel large liquid cooling plate according to claim 2, wherein, The density of the low-density heat dissipation a area third flow channel (173) and the low-density heat dissipation b area third flow channel (193) is higher than that of the low-density heat dissipation a area second flow channel (172) and the low-density heat dissipation b area second flow channel (192).

5. The multi-channel parallel large liquid cooling plate according to claim 2, wherein, The low-density heat dissipation a area flow channel (17) and the low-density heat dissipation b area flow channel (19) adopt a parallel design.

6. The multi-channel parallel large liquid cooling plate according to claim 1, wherein The actual flow channel heat transfer area of the low-density heat dissipation area (18) is smaller than that of the high-density heat dissipation area (22).

7. The multi-channel parallel large liquid cooling plate according to claim 2, characterized in that, The low-density heat dissipation a area flow channel (17) further includes a low-density heat dissipation a area fourth flow channel (23). The low-density heat dissipation a area fourth flow channel (23) is adjacent to the high-density heat dissipation area (22).

8. The multi-channel parallel large liquid cooling plate according to claim 1, wherein, The flow disturbance device (21) has a concave structure. The flow disturbance device (21) is respectively arranged in the tail manifold area (20) and the high-density heat dissipation area (22).

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