Current sharing liquid cooling plate

Abstract

The utility model relates to a kind of current-sharing liquid cooling plate, including liquid cooling plate main body, liquid cooling plate main body includes the liquid inlet, several current-sharing flow distribution areas and liquid outlet in turn intercommunication, each current-sharing flow distribution area is in turn series intercommunication, two ends of each current-sharing flow distribution area are liquid inlet flow distribution area and liquid collection area respectively, several parallel channel plates are provided between liquid inlet flow distribution area and liquid collection area along the length direction of each current-sharing flow distribution area, and it is flow channel between each channel plate;The end of each channel plate in current-sharing flow distribution area directly intercommunicated with liquid inlet is close to the liquid inlet and is provided with current-sharing device, the distance between liquid inlet and the current-sharing device is greater than 25mm, current-sharing device is provided with flow channel mouth corresponding to each flow channel one by one, for limiting the flow of fluid into each flow channel, the width of each flow channel mouth is calculated according to the following formula: Q / N=CA i *(ΔP i / ρ)^1 / 2, (I);A i =ab i , (II);ΔP i =P1 i -P2 i , (III). The internal structure of the current-sharing liquid cooling plate of the utility model is reasonably arranged, and has excellent flow guiding, flow distribution and pressure distribution effects.

Description

Technical Field

[0001] This utility model belongs to the field of liquid cooling heat dissipation, and particularly relates to a flow-equalizing liquid cooling plate. Background Technology

[0002] Current aluminum extrusion profile liquid cooling plates on the market suffer from uneven flow rate in the flow channels, resulting in uneven heating or cooling at the bottom of the battery cells, leading to significant temperature differences between the cells and excessive flow resistance. To address this issue of uneven flow rate within the liquid cooling plate's internal flow channels, Chinese patent CN109149008A discloses a liquid cooling plate with an integrated insulation layer. This plate includes a main body, with an insulation layer fixed to its lower end. One end of the main body has a liquid outlet plate with a liquid outlet pipe, and the other end has a liquid inlet plate with a liquid inlet pipe. The heat insulation layer of this invention is directly solidified on the surface of the liquid cooling plate, reducing heat loss on the non-working surface of the liquid cooling plate, improving heat dissipation efficiency and capacity, while reducing assembly plant processes, improving efficiency, and reducing costs; it can uniformly distribute the internal refrigerant, ensuring a more uniform and reliable heat dissipation effect of the liquid cooling plate body; an auxiliary flow channel is set below the main flow channel, which can increase the flow rate and volume, improve the heat dissipation speed and efficiency, and increase the heat dissipation area, thereby increasing the heat exchange volume of the liquid per unit area. Chinese patent CN109830778A discloses a uniform temperature liquid cooling plate with adjustable heat exchange intensity, belonging to the field of thermal management, and involving the cooling problems of power electronic equipment such as power battery thermal management and IGBT. It includes a cover plate 7 and a flow channel substrate 8, wherein the flow channel substrate 8 adopts a flow channel structure design with adjustable heat exchange intensity along the flow path, with fluid inlet and outlet on both sides of the narrow end, divided into a uniform flow zone 2, an adjustable heat exchange zone 3, and a confluence zone 4. The adjustable heat exchange zone 3 features fins with variable dimensions and progressively increasing density along the fluid flow direction. By altering the flow channel structure, the fluid velocity and heat exchange surface in the latter half of the flow channel are increased, thereby enhancing the heat exchange intensity along the flow direction. This invention optimizes the liquid-cooled plate flow channel structure, avoiding the problems of heat accumulation and temperature difference reduction during heat exchange, which lead to decreased heat exchange efficiency. This reduces coolant flow rate and the cost of the liquid cooling system, while also addressing the issues of temperature uniformity and high efficiency in liquid-cooled plate heat exchange. Utility Model Content

[0003] Based on the above, the purpose of this utility model is to propose a flow equalization liquid cooling plate to solve the technical problem of poor heat dissipation / heating effect of existing liquid cooling plates. The flow equalization liquid cooling plate provided by this utility model has a reasonable structural arrangement of each region and each flow channel, and has excellent flow guiding, flow splitting and pressure splitting effects.

[0004] Therefore, this utility model provides a flow equalization liquid cooling plate, including a liquid cooling plate body. The liquid cooling plate body includes a liquid inlet, a plurality of flow equalization and diversion zones and a liquid outlet connected in sequence. Each of the flow equalization and diversion zones is connected in series. The two ends of each flow equalization and diversion zone are a liquid inlet diversion zone and a liquid outlet collection zone, respectively. A plurality of parallel channel plates are provided between the liquid inlet diversion zone and the liquid outlet collection zone along the length direction of each flow equalization and diversion zone. The channel plates are used as diversion channels.

[0005] Within the flow equalization and distribution zone directly connected to the inlet, each distribution plate is equipped with a flow equalizer at one end near the inlet. The distance between the inlet and the flow equalizer is greater than 25mm. The flow equalizer has flow channels corresponding to each distribution channel to limit the flow rate of fluid entering each distribution channel. The width of each flow channel is calculated according to the following formula:

[0006] Q / N=CA i *(ΔP i / ρ)^1 / 2,(I;

[0007] A i =ab i (II);

[0008] ΔP i =P1 i -P2 i (III);

[0009] Where Q is the total flow rate of the fluid passing through the flow equalizer, C is the flow coefficient of the flow equalizer, 1.1≤C≤1.2, A i ΔP is the area of ​​the corresponding flow channel opening. i This corresponds to the pressure difference between the two ends of the flow equalizer before and after the fluid flows through the corresponding flow channel opening; ρ is the fluid density; a is the height of each flow channel opening, and the height of each flow channel opening is the same; b... i P1 represents the width of each flow channel opening, where i is the opening number. The openings are numbered sequentially from one side of the liquid cooling plate body to the other, i = 1, ..., N, where N is the number of openings in each flow equalization / distribution zone, and N ≤ 10. i This corresponds to the pressure of the fluid flowing through the front end of the flow channel, P2. i It corresponds to the pressure of the fluid flowing through the rear end face of the flow channel.

[0010] In some embodiments, the distance between the liquid inlet and the flow equalizer is greater than 25 mm and less than 50 mm.

[0011] In some embodiments, the flow equalization and diversion zones are arranged in parallel, and the fluid flow directions between adjacent flow equalization and diversion zones are opposite.

[0012] In some embodiments, the number of flow equalization and diversion zones is 2 to 6, preferably 4.

[0013] In some embodiments, the number of diversion channels in each flow equalization and diversion zone is the same.

[0014] In some embodiments, the ratio of the length to the width of each flow equalization and diversion zone is 1.5-4:1, preferably 2:1.

[0015] In some embodiments, the width of each liquid inlet diversion zone is the same as the width of each flow equalization diversion zone, and the ratio of the length to the width of each liquid inlet diversion zone is 1.5-4:1, preferably 2:1.

[0016] In some embodiments, the width of each liquid collection zone is the same as the width of each flow equalization and diversion zone, and the ratio of the length to the width of each liquid collection zone is 1.5-4:1, preferably 2:1.

[0017] In some embodiments, the length and width of each diversion channel within each flow equalization and diversion zone may be the same or different.

[0018] In some embodiments, the plurality of flow equalization and diversion zones include a first flow equalization and diversion zone, a second flow equalization and diversion zone, a third flow equalization and diversion zone, and a fourth flow equalization and diversion zone. The two ends of the first flow equalization and diversion zone are a first liquid inlet diversion zone and a first liquid outlet collection zone, respectively. The two ends of the fourth flow equalization and diversion zone are a fourth liquid inlet diversion zone and a fourth liquid outlet collection zone, respectively. The liquid inlet is connected to the first liquid inlet diversion zone, and the liquid outlet is connected to the fourth liquid outlet collection zone.

[0019] In some embodiments, the liquid collection area of ​​a flow equalization and diversion zone and the liquid inlet diversion zone of the adjacent downstream flow equalization and diversion zone are located on the same side of the flow equalization liquid cooling plate and are connected.

[0020] In some embodiments, the two ends of the second flow equalization and diversion zone are respectively the second liquid inlet diversion zone and the second liquid outlet collection zone, and the two ends of the third flow equalization and diversion zone are respectively the third liquid inlet diversion zone and the third liquid outlet collection zone. The first liquid outlet collection zone is connected to the second liquid inlet diversion zone, the second liquid outlet collection zone is connected to the third liquid inlet diversion zone, and the third liquid outlet collection zone is connected to the fourth liquid inlet diversion zone.

[0021] The beneficial effects of this utility model are as follows:

[0022] The internal structure of each region and flow channel of the uniform flow liquid cooling plate provided by this utility model is reasonably arranged. (See also...) Figure 4 It can be seen that it has excellent flow guiding, flow splitting and pressure splitting effects. Attached Figure Description

[0023] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings:

[0024] Figure 1This is a schematic diagram of the appearance of the uniform flow liquid cooling plate provided according to this utility model.

[0025] Figure 2 This is a schematic diagram of the internal structure of the uniform flow liquid cooling plate provided according to the present invention.

[0026] Figure 3 This is a schematic diagram of the internal structure of the uniform flow liquid cooling plate provided according to the present invention.

[0027] Figure 4 The figure shows the simulation results of the internal flow of the liquid cooling plate according to Embodiment 1 of this utility model.

[0028] In the accompanying drawings, the same parts are referred to by the same reference numerals, and the drawings are not drawn to scale.

[0029] Among them, 1. Liquid cooling plate body, 2. Liquid inlet, 3. Liquid outlet, 4. First flow equalization and diversion zone, 5. Second flow equalization and diversion zone, 6. Third flow equalization and diversion zone, 7. Fourth flow equalization and diversion zone, 8. Diversion plate, 9. Diversion channel; 10. First liquid inlet diversion zone, 11. First liquid outlet collection zone, 12. Second liquid inlet diversion zone, 13. Second liquid outlet collection zone, 14. Third liquid inlet diversion zone, 15. Third liquid outlet collection zone, 16. Fourth liquid inlet diversion zone, 17. Fourth liquid outlet collection zone, 18. Flow equalizer, 19. Flow channel opening. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of this utility model, and to fully understand and implement the process of how this utility model applies technical means to solve technical problems and achieve corresponding technical effects, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. The embodiments of this utility model and the various features within them can be combined with each other without conflict, and the resulting technical solutions are all within the protection scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0033] like Figure 1-4 As shown, a flow equalization liquid cooling plate includes a liquid cooling plate body 1. The liquid cooling plate body 1 includes a liquid inlet 2, a first flow equalization and diversion zone 4, a second flow equalization and diversion zone 5, a third flow equalization and diversion zone 6, a fourth flow equalization and diversion zone 7, and a liquid outlet 3 connected in sequence. Each flow equalization and diversion zone is connected in series. The two ends of each flow equalization and diversion zone are a liquid inlet diversion zone and a liquid outlet collection zone. A plurality of parallel diversion plates 8 are provided between the liquid inlet diversion zone and the liquid outlet collection zone along the length direction of each flow equalization and diversion zone. There are diversion channels 9 between each diversion plate. The flow equalization and diversion zones are arranged side by side, and the fluid flow directions between adjacent flow equalization and diversion zones are opposite.

[0034] In the first flow equalization and diversion zone 4, each diversion plate 8 is equipped with a flow equalizer 18 near the inlet 2. The distance between the inlet 2 and the flow equalizer 18 is greater than 25 mm. The flow equalizer 18 includes several flow channels 19 that correspond one-to-one with each diversion channel 9, used to limit the flow rate of fluid entering each diversion channel 9. The width of each flow channel 19 is calculated according to the following formula:

[0035] Q / N=CA i *(ΔP i / ρ)^1 / 2,(I;

[0036] A i =ab i (II);

[0037] ΔP i =P1 i -P2 i (III);

[0038] Where Q is the total flow rate of the fluid passing through the flow equalizer 18, C is the flow coefficient of the flow equalizer 18, 1.1≤C≤1.2, A i For the area of ​​the corresponding flow channel 19, a is the height of each flow channel 19, and the height of each flow channel 19 is the same, b is the area of ​​the corresponding flow channel 19. i ΔP represents the width of each flow channel 19, where i is the number of the flow channel 19. Each flow channel 19 is numbered sequentially from one side of the liquid cooling plate body to the other, i=1,...N, where N is the number of flow channel 19s in each flow equalization and distribution zone, N≤10. i This corresponds to the pressure difference between the two ends of the flow equalizer 18 before and after the fluid flows through the flow channel inlet, P1. i This corresponds to the pressure of the fluid flowing through the front end of the flow channel, P2. i It corresponds to the pressure of the fluid flowing through the rear end face of the flow channel.

[0039] The first flow equalization and diversion zone 4 has two ends, namely the first inlet flow equalization zone 10 and the first outlet flow equalization zone 11. The second flow equalization and diversion zone 5 has two ends, namely the second inlet flow equalization zone 12 and the second outlet flow equalization zone 13. The third flow equalization and diversion zone 6 has two ends, namely the third inlet flow equalization zone 14 and the third outlet flow equalization zone 15. The fourth flow equalization and diversion zone 7 has two ends, namely the fourth inlet flow equalization zone 16 and the fourth outlet flow equalization zone 17. The inlet 2 is connected to the first inlet flow equalization zone 10. The first outlet flow equalization zone 11 is connected to the second inlet flow equalization zone 12. The second outlet flow equalization zone 13 is connected to the third inlet flow equalization zone 14. The third outlet flow equalization zone 16 is connected to the fourth inlet flow equalization zone 16. The fourth outlet flow equalization zone 17 is connected to the outlet 3.

[0040] In each flow equalization and diversion zone, the number of diversion channels 9 is the same, the length-to-width ratio of each flow equalization and diversion zone is 1.5-4:1, the width of each liquid inlet diversion zone is the same as the width of each flow equalization and diversion zone, the length-to-width ratio of each liquid inlet diversion zone is 1.5-4:1, the width of each liquid outlet collection zone is the same as the width of each flow equalization and diversion zone, the length-to-width ratio of each liquid outlet collection zone is 1.5-4:1, and the length and width of each diversion channel 9 in each flow equalization and diversion zone are the same or different.

[0041] Example 1

[0042] The flow equalization liquid cooling plate provided in this embodiment includes a liquid cooling plate body 1. The liquid cooling plate body 1 includes a liquid inlet 2, a first flow equalization and diversion zone 4, a second flow equalization and diversion zone 5, a third flow equalization and diversion zone 6, a fourth flow equalization and diversion zone 7, and a liquid outlet 3 connected in sequence. The two ends of each flow equalization and diversion zone are a liquid inlet diversion zone and a liquid outlet collection zone. A plurality of parallel diversion plates 8 are provided between the liquid inlet diversion zone and the liquid outlet collection zone along the length direction of each flow equalization and diversion zone. There are diversion channels 9 between each diversion plate. The fluid flow direction between adjacent flow equalization and diversion zones is opposite, and the fluid flow direction in each diversion channel 9 in the same flow equalization and diversion zone is the same.

[0043] In the first flow equalization and diversion zone 4, each diversion plate 8 is equipped with a flow equalizer 18 near the inlet 2. The distance between the inlet 2 and the flow equalizer 18 is 30mm. The flow equalizer 18 includes several flow channels 19 that correspond one-to-one with each diversion channel 9, used to limit the flow rate of fluid entering each diversion channel 9. The width of each flow channel 19 is calculated according to the following formula:

[0044] Q / N=CA i *(ΔP i / ρ)^1 / 2,(I)

[0045] A i =ab i (II)

[0046] ΔP i =P1 i -P2 i (III)

[0047] Where Q is the total flow rate of the fluid passing through the flow equalizer 18, C is the flow coefficient of the flow equalizer 18, 1.1≤C≤1.2, A i For the area of ​​the corresponding flow channel 19, a is the height of each flow channel 19, and the height of each flow channel 19 is the same, b is the area of ​​the corresponding flow channel 19. i Here, ΔP represents the width of each flow channel 19, and i is the number of the flow channel 19. Each flow channel 19 is numbered sequentially from one side of the liquid cooling plate body to the other, i=1,...N, where N is the number of flow channel 19s in each flow equalization / diversion zone, N=5. i This corresponds to the pressure difference between the two ends of the flow equalizer 18 before and after the fluid flows through the flow channel inlet, P1. i This corresponds to the pressure of the fluid flowing through the front end of the flow channel, P2. i It corresponds to the pressure of the fluid flowing through the rear end face of the flow channel.

[0048] In each of the flow equalization and diversion zones, there are 5 diversion channels 9. The length-to-width ratio of each flow equalization and diversion zone is 2:1. The width of each liquid inlet diversion zone is the same as the width of each flow equalization and diversion zone. The length-to-width ratio of each liquid inlet diversion zone is 2:1. The width of each liquid outlet collection zone is the same as the width of each flow equalization and diversion zone. The length-to-width ratio of each liquid outlet collection zone is 2:1.

[0049] The specific calculation process for a certain flow channel opening x is as follows:

[0050] Given: P1 X =700Pa, P2 x =100Pa, ΔP x =600Pa,

[0051] Then Q=0.000084m3 / s, C=1.1, the fluid used in this embodiment is a 50wt% ethylene glycol aqueous solution with a density ρ of 1072 kg / m³. 3 From equation (I), A = 0.0000936m is calculated. 2 ,

[0052] In this embodiment, the height of each flow channel opening 19 is the same, a = 0.007m = 7mm.

[0053] To ensure consistent flow rate in each channel, different ΔP values ​​are introduced. i Therefore, we can calculate: b1=11mm, b2=12mm, b3=12.8mm, b4=13.2mm, b5=14.5mm.

[0054] Based on the calculation results of Example 1, the width b of each flow channel opening 19 in the flow equalizer 18 is set. i The simulation results of the fluid flow in the internal channels of the uniform flow liquid cooling plate according to Example 1 are shown in the figure. Figure 4 .like Figure 4 As shown, the internal structure of each region and each flow channel of the flow equalization liquid cooling plate provided by this utility model is reasonably arranged, and it has excellent flow guiding, flow splitting and pressure splitting effects.

[0055] The above description is merely a selection of preferred embodiments of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model in the embodiments is not limited to the specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this utility model.

Claims

1. A flow equalization liquid cooling plate, comprising a liquid cooling plate body, characterized in that, The liquid cooling plate body includes a liquid inlet, several flow equalization and diversion zones and a liquid outlet connected in sequence. Each of the flow equalization and diversion zones is connected in series. The two ends of each flow equalization and diversion zone are a liquid inlet diversion zone and a liquid outlet collection zone, respectively. Several parallel channel plates are provided between the liquid inlet diversion zone and the liquid outlet collection zone along the length direction of each flow equalization and diversion zone. The channels between each channel plate are diversion channels. Within the flow equalization and distribution zone directly connected to the inlet, each distribution plate is equipped with a flow equalizer at one end near the inlet. The distance between the inlet and the flow equalizer is greater than 25 mm. The flow equalizer has flow channels corresponding to each distribution channel to limit the flow rate of fluid entering each distribution channel. The width of each flow channel is calculated according to the following formula: Q / N=CA i *(ΔP i / ρ)^1 / 2,(I); AT i =ab i ,(II); ΔP i =P1 i -P2 i ,(III); Where Q is the total flow rate of the fluid passing through the flow equalizer, C is the flow coefficient of the flow equalizer, 1.1≤C≤1.2, A i ΔP is the area of ​​the corresponding flow channel opening. i This corresponds to the pressure difference between the two ends of the flow equalizer before and after the fluid flows through the corresponding flow channel opening; ρ is the fluid density; a is the height of each flow channel opening, and the height of each flow channel opening is the same; b... i P1 represents the width of each flow channel opening, where i is the opening number. The openings are numbered sequentially from one side of the liquid cooling plate body to the other, i = 1, ..., N, where N is the number of openings in each flow equalization / distribution zone, and N ≤ 10. i P1 is the pressure of the fluid flowing through the front end of the flow channel, and P2 is the pressure of the fluid flowing through the rear end of the flow channel.

2. The uniform flow liquid cooling plate according to claim 1, characterized in that, The distance between the liquid inlet and the flow equalizer is greater than 25 mm and less than 50 mm.

3. The uniform flow liquid cooling plate according to claim 1, characterized in that, The flow equalization and diversion zones are arranged side by side, with the fluid flow directions between adjacent flow equalization and diversion zones being opposite; and / or the number of flow equalization and diversion zones is 2 to 6.

4. The uniform flow liquid cooling plate according to claim 1, characterized in that, The number of diversion channels is the same in each of the flow equalization and diversion zones.

5. The uniform flow liquid cooling plate according to claim 1, characterized in that, The length-to-width ratio of each flow equalization and diversion zone is 1.5-4:

1.

6. The flow equalization liquid cooling plate according to any one of claims 1-5, characterized in that, The width of each liquid inlet diversion zone is the same as the width of each flow equalization diversion zone, and the ratio of the length to the width of each liquid inlet diversion zone is 1.5-4:

1.

7. The flow equalization liquid cooling plate according to any one of claims 1-5, characterized in that, The width of each liquid collection zone is the same as the width of each flow equalization and diversion zone, and the ratio of the length to the width of each liquid collection zone is 1.5-4:

1.

8. The flow equalization liquid cooling plate according to any one of claims 1-5, characterized in that, The length and width of each diversion channel within each flow equalization and diversion zone may be the same or different.

9. The uniform flow liquid cooling plate according to any one of claims 1-5, characterized in that, The plurality of flow equalization and diversion zones include a first flow equalization and diversion zone, a second flow equalization and diversion zone, a third flow equalization and diversion zone, and a fourth flow equalization and diversion zone. The two ends of the first flow equalization and diversion zone are a first liquid inlet diversion zone and a first liquid outlet collection zone, respectively. The two ends of the fourth flow equalization and diversion zone are a fourth liquid inlet diversion zone and a fourth liquid outlet collection zone, respectively. The liquid inlet is connected to the first liquid inlet diversion zone, and the liquid outlet is connected to the fourth liquid outlet collection zone.

10. The flow equalization liquid cooling plate according to any one of claims 1-5, characterized in that, The liquid collection area of ​​a flow equalization and diversion zone and the liquid inlet diversion zone of the adjacent downstream flow equalization and diversion zone are located on the same side of the flow equalization liquid cooling plate and are connected.

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