Double-sided heat dissipation liquid cooling plate

Abstract

This invention relates to the field of liquid cooling plate heat dissipation technology and discloses a double-sided heat dissipation liquid cooling plate, including a flat tube body. One side of the flat tube body is equipped with an inlet / outlet water chamber, and the side of the flat tube body away from the inlet / outlet water chamber is equipped with a return water chamber. A first cavity is formed on the inner wall of the flat tube body near the top, a second cavity is formed on the inner wall of the flat tube body near the bottom, and a third cavity is formed on the inner walls of the flat tube body near both sides. A water distribution and heat dissipation component is provided on the inner wall of the first cavity, and a return water component is provided on the inner wall of the second cavity. A water distribution valve is installed on the inner wall of the first cavity near the inlet / outlet water chamber. Through the independent flow channel design of the first and second cavities, combined with the precise flow distribution of the water distribution valve and the pressure balance adjustment of the manifold, the refrigerant is evenly distributed within the double-sided flow channels, reducing the temperature difference between the two sides of the battery pack and reducing temperature differences between different areas, effectively avoiding battery degradation caused by localized high temperatures.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling plate heat dissipation technology, specifically a double-sided heat dissipation liquid cooling plate. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage batteries and other fields toward high power density and high integration, the heat generation power of battery packs continues to increase, which puts forward stringent requirements on the heat dissipation efficiency, temperature control uniformity and structural compactness of the heat dissipation system. As the core heat dissipation component of the battery pack, the performance of the liquid cooling plate directly affects the cycle life, charge and discharge efficiency and safety stability of the battery.

[0003] Existing liquid cooling plates mostly adopt single-sided heat dissipation or simple double-sided flow channel design, which has the following problems:

[0004] The existing liquid cooling plates have a single cavity or a simple partition structure for the flow channels. The refrigerant is prone to uneven flow rate and local stagnation in the flow channels, resulting in large temperature differences on both sides and in different areas of the battery pack. The battery degradation is accelerated in high-temperature areas, which affects the overall performance of the battery pack.

[0005] The design of the turbulence structure inside the flow channel is unreasonable, the refrigerant flow boundary layer is thick, the convective heat transfer coefficient is low, and it is difficult to quickly remove the large amount of heat generated by the battery. Especially under extreme conditions such as fast charging, heat dissipation bottlenecks are likely to occur.

[0006] Existing liquid cooling plates are mostly designed with fixed flow channels, which cannot dynamically adjust the refrigerant flow according to the temperature changes in different areas of the battery. When the temperature in a local area rises, it cannot be used to enhance heat dissipation in a targeted manner, resulting in energy waste or insufficient heat dissipation.

[0007] During the refrigerant return process, due to factors such as differences in flow channel resistance and local blockages, problems such as uneven return flow and excessive pressure loss are likely to occur, which further aggravates uneven heat dissipation and affects the circulation efficiency of the entire cooling system. Summary of the Invention

[0008] This invention provides a double-sided heat dissipation liquid cooling plate to solve the problems mentioned in the background art.

[0009] This invention provides the following technical solution: a double-sided heat dissipation liquid cooling plate, comprising a flat tube body, an inlet and outlet water chamber mounted on one side of the flat tube body, and a return water chamber mounted on the side of the flat tube body away from the inlet and outlet water chambers. A first cavity is formed on the inner wall of the flat tube body near the top, a second cavity is formed on the inner wall of the flat tube body near the bottom, and a third cavity is formed on the inner walls of the flat tube body near both sides. A water distribution and heat dissipation assembly is provided on the inner wall of the first cavity, and a return water assembly is provided on the inner wall of the second cavity. A water distribution valve is mounted on the inner wall of the first cavity near the inlet and outlet water chambers, and a manifold is provided on the inner wall of the second cavity near the inlet and outlet water chambers. A manifold groove is formed on the side of the manifold. The inner wall of the second cavity near the inlet / outlet water chamber is equipped with an electric telescopic rod two. The output end of the electric telescopic rod two is equipped with a slider, and the side of the slider is slidably connected to the inner wall of the second cavity. An auxiliary plate is equipped on the side of the slider, and a rotating frame is equipped on the inner wall of the auxiliary plate. A rotating plate is rotatably connected to the inner wall of the rotating frame. The side of the rotating plate is equipped with the side of the manifold plate. A sealing gasket one is installed on the side of the auxiliary plate. A sealing gasket two is installed on the inner wall of the second cavity, and the side of the sealing gasket two is slidably adjacent to the side of the sealing gasket one. Elastic pads are installed on both sides of the manifold plate. The slider drives the rotating plate to rotate through the auxiliary plate and the rotating frame, thereby causing the manifold plate to deflect around the rotating frame.

[0010] As a preferred embodiment of the present invention, the water distribution and heat dissipation assembly includes a hollow water distribution plate, the number of which is several, and the several hollow water distribution plates form a water distribution cavity between each other, and the inner wall of the water distribution cavity is equipped with a baffle plate.

[0011] As a preferred embodiment of the present invention, a main temperature sensor is installed on the top inner wall of the flat tube body near the baffle plate, and a secondary temperature sensor is installed on the top inner wall of the flat tube body near the water distribution valve, and the secondary temperature sensor and the water distribution chamber are on the same plane.

[0012] As a preferred embodiment of the present invention, an electric telescopic rod is mounted on the top of the inner wall of the water distribution valve, a baffle plate is installed at the output end of the electric telescopic rod, and the electric telescopic rod is electrically connected to the adjacent main temperature sensor and the adjacent auxiliary temperature sensor.

[0013] As a preferred embodiment of the present invention, the water distribution valve has a diversion groove on the side near the first cavity, and the number of the diversion grooves is several, and the sides of two diversion grooves overlap with the side of the baffle plate.

[0014] As a preferred embodiment of the present invention, the water return assembly includes a plurality of short ribs, and a return channel is formed between the plurality of short ribs. The inner wall of the return channel is fitted with inclined ribs.

[0015] As a preferred embodiment of the present invention, the inner walls of the first cavity and the second cavity are each provided with a set of water return components. The water return components in the first cavity are used to enhance the turbulence effect and improve the heat dissipation efficiency, while the water return components in the inner wall of the second cavity are used to enhance the turbulence effect and improve the refrigerant residence time.

[0016] As a preferred embodiment of the present invention, a pressure sensor 1 is installed on the inner wall of the manifold near the inlet / outlet water chamber, and a pressure sensor 2 is installed on the inner wall of the manifold near the return water chamber. There are two pressure sensors 1 and two pressure sensors 2, and both pressure sensors 1 and two pressure sensors 2 are electrically connected to the adjacent electric telescopic rod 2.

[0017] As a preferred embodiment of the present invention, an inlet groove is provided on the inner wall near the top of the inlet / outlet chamber, a first connector is sleeved on the inner wall at the top of the inlet / outlet chamber, an outlet groove is provided on the inner wall near the bottom of the inlet / outlet chamber, a second connector is sleeved on the inner wall near the bottom of the inlet / outlet chamber, and a return groove is provided on the inner wall of the return chamber. The inner wall of the first connector is connected to the inner wall of the second connector by passing through the inner wall of the inlet groove, the inner wall of the first cavity, the inner wall of the return groove, the inner wall of the second cavity, and the inner wall of the outlet groove in sequence.

[0018] The present invention has the following beneficial effects:

[0019] 1. This double-sided heat dissipation liquid cooling plate, through the independent flow channel design of the first cavity and the second cavity, combined with the precise flow distribution of the water distribution valve and the pressure balance adjustment of the manifold, makes the refrigerant evenly distributed in the double-sided flow channel, reduces the temperature difference between the two sides of the battery pack, and reduces the temperature difference between different areas, effectively avoiding battery degradation caused by local high temperature.

[0020] 2. This double-sided heat dissipation liquid cooling plate, through the combined use of the water distribution heat dissipation component in the first cavity and the water return component in the second cavity, utilizes a turbulence structure to disrupt the refrigerant flow boundary layer, increasing the heat exchange area. Compared with traditional liquid cooling plates, it improves the convective heat transfer coefficient, thereby increasing the heat dissipation power and meeting the heat dissipation requirements of high power density battery packs.

[0021] 3. This double-sided heat dissipation liquid cooling plate uses a water distribution valve in the first cavity to receive a signal from a temperature sensor. The electric telescopic rod drives the baffle plate to dynamically adjust the flow area of ​​the diversion channel, achieving precise and enhanced heat dissipation in high-temperature areas. The manifold in the second cavity uses a pressure sensor to detect the pressure difference and is driven by an electric telescopic rod to dynamically adjust the flow area of ​​the flow channel to balance the return liquid pressure. The two form a closed-loop control of "precise liquid diversion inlet and liquid pressure balance in return", which is suitable for the heat dissipation requirements of the battery pack under different operating conditions.

[0022] 4. This double-sided heat dissipation liquid cooling plate integrates a multi-cavity structure through a flat tube body, eliminating the need for additional heat dissipation components. Its compact structure is suitable for the lightweight and miniaturized installation requirements of battery packs. The internal flow channel of the flat tube body adopts an integrated molding design, combined with sealing structures such as sealing gaskets and elastic gaskets, resulting in excellent sealing performance, preventing refrigerant leakage, while enhancing the structure's resistance to vibration and impact, and extending its service life.

[0023] 5. This double-sided liquid cooling plate can be used with appropriate flow channel components according to different heat dissipation requirements. It can be used for efficient heat dissipation under normal working conditions, and can further enhance the double-sided heat exchange efficiency under extreme heat conditions. It has strong versatility. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the front section structure of the present invention;

[0026] Figure 3 This is a side sectional view of the inlet and outlet water chambers of the present invention;

[0027] Figure 4 This is a schematic diagram of the side section structure of the return water chamber of the present invention;

[0028] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0029] Figure 6 This is a schematic diagram of the water-distribution heat dissipation component structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the inclined bar cross-section structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the cross-sectional structure of the busbar of the present invention;

[0032] Figure 9 This is a schematic cross-sectional view of the water baffle structure of the present invention;

[0033] Figure 10 This is a schematic diagram of the busbar structure of the present invention.

[0034] In the diagram: 1. Flat tube body; 2. Inlet and outlet water chambers; 3. Return water chamber; 4. First cavity; 5. Second cavity; 6. Third cavity; 7. Water distribution and heat dissipation assembly; 8. Return water assembly; 9. Water distribution valve; 10. Water baffle; 11. Electric telescopic rod one; 12. Diversion channel; 13. Electric telescopic rod two; 14. Slider; 15. Auxiliary plate; 16. Rotating frame; 17. Rotating plate; 18. Combining plate; 19. Pressure sensor one; 20. Pressure sensor two; 21. Combining channel; 22. Sealing gasket two; 23. Sealing gasket one; 24. First connector; 25. Second connector; 26. Inlet channel; 27. Outlet channel; 28. Return water channel; 29. ​​Elastic pad;

[0035] 701. Hollow water distribution plate; 702. Water distribution chamber; 703. Baffle plate; 704. Main temperature sensor; 705. Secondary temperature sensor;

[0036] 801. Short rib; 802. Diagonal rib; 803. Reflux groove. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1

[0039] Please see Figures 1-10 A double-sided heat dissipation liquid cooling plate includes a flat tube body 1. One side of the flat tube body 1 is fitted with an inlet / outlet water chamber 2, and the side of the flat tube body 1 away from the inlet / outlet water chamber 2 is fitted with a return water chamber 3. A first cavity 4 is formed on the inner wall of the flat tube body 1 near the top, a second cavity 5 is formed on the inner wall of the flat tube body 1 near the bottom, and third cavities 6 are formed on the inner walls of the flat tube body 1 near both sides. A water distribution heat dissipation component 7 is provided on the inner wall of the first cavity 4, and a return water component 8 is provided on the inner wall of the second cavity 5. The inner wall of the first cavity 4 near the inlet / outlet water chamber 2 is fitted with... The system includes a water distribution valve 9 and a manifold 18 on the inner wall of the second cavity 5 near the inlet / outlet water chamber 2. A manifold groove 21 is provided on the side of the manifold 18. The water distribution and heat exchange assembly 7 enhances the refrigerant distribution and heat exchange efficiency on the liquid inlet side of the first cavity 4, while the return water assembly 8 enhances the turbulence and refrigerant residence time on the liquid return side of the second cavity 5. Combined with the dynamic adjustment of the water distribution valve 9 and the manifold 18, efficient and uniform heat dissipation is achieved. The flat tube body 1 is integrally extruded from a high thermal conductivity aluminum alloy. The aluminum alloy material possesses excellent thermal conductivity with a thermal conductivity coefficient ≥200W / (m²). The flat tube body 1 has a structural strength that ensures rapid heat transfer from the battery to the refrigerant, while also resisting battery pack pressure and vehicle vibration. One side of the flat tube body 1 is fitted with an inlet / outlet water chamber 2 by welding, and the other side is fitted with a return water chamber 3 by welding. The welding is done using argon arc welding to ensure sealing performance and prevent refrigerant leakage. The third cavity 6 further enhances the structural strength of the flat tube body 1 and also plays an auxiliary role in heat dissipation. The manifold 21 adopts a gradient aperture design, with an inlet aperture of a and an outlet aperture of b, where a > b, which can initially balance the return resistance.

[0040] In a preferred embodiment, the water distribution heat dissipation assembly 7 includes a number of hollow water distribution plates 701, and the number of hollow water distribution plates 701 is several. The water distribution plates 701 are adjacent to each other to form water distribution cavities 702. The inner wall of the water distribution cavity 702 is equipped with a baffle plate 703. By opening the water distribution cavity 702, the number of water distribution cavities 702 corresponds one-to-one with the heat-generating areas of the battery pack, ensuring that the refrigerant can be accurately distributed to each heat-generating area. The hollow water distribution plate 701 adopts a hollow structure design, which, compared with a solid water distribution plate, reduces the overall weight of the liquid cooling plate and increases the contact area between the refrigerant and the water distribution plate, thereby improving the heat conduction efficiency. The baffle plates 703 in adjacent water distribution cavities 702 are arranged opposite to each other to form an interlaced baffle structure, which effectively breaks the refrigerant flow boundary layer, causing the refrigerant to change from a laminar flow state to a turbulent flow state, enhancing the heat exchange intensity between the refrigerant and the flow channel wall, while avoiding local stagnation of the refrigerant in the water distribution cavity 702, and improving the heat dissipation uniformity.

[0041] In a preferred embodiment, a main temperature sensor 704 is mounted on the top inner wall of the flat tube body 1 near the spoiler 703, and a secondary temperature sensor 705 is mounted on the top inner wall of the flat tube body 1 near the water distribution valve 9. The secondary temperature sensor 705 is on the same plane as the water distribution chamber 702. Both the main temperature sensor 704 and the secondary temperature sensor 705 are miniature NTC temperature sensors, which accurately collect the battery surface temperature of the corresponding area of ​​each water distribution chamber 702, ensuring the accuracy and reliability of temperature detection and providing accurate signal input for the adjustment of the water distribution valve 9.

[0042] In a preferred embodiment, an electric telescopic rod 11 is mounted on the top of the inner wall of the water distribution valve 9. A baffle plate 10 is installed at the output end of the electric telescopic rod 11. The electric telescopic rod 11 is electrically connected to the adjacent main temperature sensor 704 and the adjacent secondary temperature sensor 705. The electric telescopic rod 11 is a miniature DC electric telescopic rod, which can precisely drive the movement of the baffle plate 10. The electric telescopic rod 11 is electrically connected to the adjacent main temperature sensor 704 and the adjacent secondary temperature sensor 705 through wires. The wires are hidden in the miniature wire groove inside the wall of the water distribution valve 9 to avoid contact with the refrigerant and improve electrical safety. The baffle plate 10 is made of aluminum sheet with an anodized surface treatment to resist refrigerant corrosion.

[0043] In a preferred embodiment, the water distribution valve 9 has a diversion groove 12 on the side near the first cavity 4. There are several diversion grooves 12, and the sides of two diversion grooves 12 overlap with the side of the baffle plate 10. When the auxiliary temperature sensor 705 detects that the battery temperature in a certain area is too high, it sends a signal to the electric telescopic rod 11. The electric telescopic rod 11 drives the baffle plate 10 to move down, reducing the flow area of ​​the corresponding diversion groove 12, increasing the refrigerant flow rate, and specifically enhancing the heat dissipation of the area. When the temperature drops, the electric telescopic rod 11 drives the baffle plate 10 to move up and reset, restoring normal flow distribution.

[0044] In a preferred embodiment, the water return assembly 8 includes a plurality of short ribs 801, and a return channel 803 is formed between the plurality of short ribs 801. The inner wall of the return channel 803 is fitted with inclined ribs 802. Through the cooperation of the short ribs 801 and the inclined ribs 802, the flow channels are separated and the structural strength is enhanced. The short ribs 801 also assist in turbulence of the refrigerant, which helps to prolong the residence time of the refrigerant in the second cavity 5, so that the refrigerant can fully absorb the heat transferred from the battery to the return liquid side. At the same time, it avoids the problem of insufficient heat exchange caused by the refrigerant having too fast a flow rate during the return liquid process, thereby improving the overall heat dissipation efficiency.

[0045] In a preferred embodiment, an electric telescopic rod 13 is mounted on the inner wall of the second cavity 5 near the inlet / outlet water chamber 2. A slider 14 is mounted on the output end of the electric telescopic rod 13, and the side of the slider 14 is slidably connected to the inner wall of the second cavity 5. An auxiliary plate 15 is mounted on the side of the slider 14, and a rotating frame 16 is mounted on the inner wall of the auxiliary plate 15. A rotating plate 17 is rotatably connected to the inner wall of the rotating frame 16, and the side of the rotating plate 17 is mounted to the side of the manifold 18. A sealing gasket 23 is installed on the side of the auxiliary plate 15, and a sealing gasket 22 is installed on the inner wall of the second cavity 5. The sealing gasket 22 is slidably connected to the inner wall of the second cavity 5. The adjacent sides of the sealing gasket 23 slide together. Both sides of the manifold 18 are equipped with elastic gaskets 29. The model of the electric telescopic rod 13 is the same as that of the electric telescopic rod 11 to ensure drive reliability. Both the sealing gasket 22 and the sealing gasket 23 are made of fluororubber, which is resistant to refrigerant corrosion and has excellent sealing performance. The elastic gasket 29 is made of silicone and plays a role in buffering and sealing, ensuring the sealing performance between the manifold 18 and the inner wall of the second cavity 5 and preventing refrigerant leakage. The auxiliary plate 15 is hinged to one end of the rotating frame 16 by a pin, thereby converting the linear displacement of the slider 14 into the angular displacement of the rotating frame 16.

[0046] In a preferred embodiment, a pressure sensor 19 is installed on the inner wall of the manifold 18 near the inlet / outlet water chamber 2, and a pressure sensor 20 is installed on the inner wall of the manifold 18 near the return water chamber 3. There are two pressure sensors 19 and 20, and both are electrically connected to adjacent electric telescopic rods 213. The pressure difference across the manifold 18 (ΔP = pressure sensor 20 detection value - pressure sensor value) is detected. The readings from device 19 reflect the change in resistance on the return flow side. When the pressure difference increases, it indicates that there is a local increase in resistance on the return side. The electric telescopic rod 13 drives the slider 14 to move, which in turn drives the manifold 18 to rotate through the rotating plate 17. This causes the side of the manifold 18 to separate from the side of the inner wall of the second cavity 5. The gap between the second cavity 5 and the manifold 18 is used to assist the return flow, thereby increasing the flow area of ​​the corresponding manifold 21 and reducing the return flow resistance. When the pressure difference decreases, it indicates that the local resistance on the return side is too small. The electric telescopic rod 13 drives the manifold 18 to rotate in the opposite direction, reducing the flow area, balancing the return flow pressure, and ensuring uniform return flow.

[0047] In a preferred embodiment, an inlet groove 26 is formed on the inner wall near the top of the inlet / outlet chamber 2, a first connector 24 is fitted onto the inner wall at the top of the inlet / outlet chamber 2, an outlet groove 27 is formed on the inner wall near the bottom of the inlet / outlet chamber 2, a second connector 25 is fitted onto the inner wall near the bottom of the inlet / outlet chamber 2, and a return groove 28 is formed on the inner wall of the return chamber 3. The inner wall of the first connector 24 passes sequentially through the inner wall of the inlet groove 26, the inner wall of the first cavity 4, the inner wall of the return groove 28, and the second cavity. The inner wall of 5 and the inner wall of the outlet trough 27 are connected to the inner wall of the second connector 25. The refrigerant flows in from the first connector 24, enters the first cavity 4 through the inlet trough 26, and is evenly distributed to each water distribution cavity 702 under the action of the water distribution heat dissipation component 7. After exchanging heat with the battery, it flows into the second cavity 5 through the return trough 28. Under the turbulence of the return trough component 8, it further exchanges heat and finally flows out from the second connector 25 through the confluence trough 21 and outlet trough 27 of the confluence plate 18, completing the heat dissipation cycle.

[0048] Working principle:

[0049] Refrigerant circulation start-up and initial distribution: The low-temperature refrigerant supplied by the external cooling system flows into the inlet tank 26 of the inlet and outlet water chamber 2 through the first connector 24. The inlet tank 26 guides the refrigerant into the inlet end of the first cavity 4. At this time, the electric telescopic rod 11 in the water distribution valve 9 is in the initial retracted state, and the baffle plate 10 is located above the diversion channel 12. The diversion channel 12 maintains the maximum flow area and corresponds one-to-one with the water distribution chambers 702 in the first cavity 4. The refrigerant quickly enters each water distribution chamber 702 through the diversion channel 12 to complete the initial flow distribution.

[0050] Enhanced heat transfer and temperature feedback on the liquid inlet side: After the refrigerant enters the water distribution chamber 702, it is guided and separated by the hollow water distribution plate 701 and turbulent by the baffle plate 703. The hollow structure of the hollow water distribution plate 701 increases the contact area of ​​the refrigerant. Together with the baffle plate 703, the refrigerant is transformed into a turbulent state, which greatly improves the convective heat transfer efficiency with the inner wall of the flat tube body 1. During this process, the outer surface of the flat tube body 1 is in close contact with the battery pack. The heat generated by the battery is quickly conducted to the refrigerant through the flat tube body 1, and the temperature of the refrigerant gradually increases. At the same time, the main temperature sensor 704 and the auxiliary temperature sensor 705 detect the surface temperature of the battery in the corresponding area of ​​the water distribution chamber 702. The main temperature sensor 704 and the auxiliary temperature sensor 705 transmit the temperature signal to the control module of the electric telescopic rod 11 in real time.

[0051] Dynamic flow control of water distribution valve 9: When the auxiliary temperature sensor 705 detects that the battery temperature in a certain area exceeds the set threshold, the control module determines that the heat dissipation demand in that area is increased. It immediately commands the electric telescopic rod 11 of the corresponding area to extend, driving the baffle 10 to move downward. The baffle 10 is tightly connected to the side of the diversion channel 12. During the downward movement, the effective flow area of ​​the diversion channel 12 is gradually reduced. According to the principle of fluid mechanics, the reduction of the flow area leads to an increase in the refrigerant flow rate. The refrigerant flow rate through the water distribution chamber 702 per unit time increases, enhancing the local heat exchange efficiency and quickly removing excess heat from the battery. When the main temperature sensor 704 detects that the refrigerant temperature in that area drops, the control module commands the electric telescopic rod 11 to shorten, the baffle 10 to move upward and reset, the diversion channel 12 to restore the maximum flow area, and the flow rate returns to normal, avoiding energy waste. Through this dynamic adjustment, it is ensured that the temperature of each area of ​​the battery pack is always stable within a reasonable range, and the temperature difference between the two sides is controlled within 2℃.

[0052] Return-side turbulence heat transfer and pressure detection: The refrigerant that has completed heat transfer on the inlet side flows into the second cavity 5 (return-side) through the return water tank 28 at the other end of the flat tube body 1. The return water assembly 8 in the second cavity 5 enhances turbulence and prolongs residence time: the transversely distributed short ribs 801 divide the second cavity 5 into multiple return channels 803, corresponding one-to-one with the water distribution chambers 702 on the inlet side, ensuring the continuous flow path of the refrigerant; the inclined ribs 802 in the return channels 803 are inclined at 30° to the refrigerant flow direction, further... Disrupting the refrigerant flow prolongs the refrigerant's residence time in the second cavity 5, allowing the refrigerant to fully absorb the residual heat transferred from the battery to the return liquid side, ultimately raising the refrigerant temperature to 40-45℃. Simultaneously, pressure sensors 19 and 20 on both sides of the manifold 18 detect the pressure difference in real time (ΔP = pressure sensor 20 detection value - pressure sensor 19 detection value). This pressure difference directly reflects the change in the flow resistance on the return liquid side and transmits the pressure difference signal to the control module of the electric telescopic rod 13.

[0053] Dynamic pressure regulation of manifold 18: When the pressure difference ΔP exceeds the set upper limit, it indicates that the flow resistance in a certain area on the return side has increased, resulting in insufficient return flow in that area. The control module commands the electric telescopic rod 13 in the corresponding area to extend, pushing the slider 14 to slide along the inner wall of the second cavity 5. The slider 14 drives the rotating plate 17 to rotate through the auxiliary plate 15 and the rotating frame 16, thereby causing the manifold 18 to deflect around the rotating frame 16. The manifold groove 21 on the side of the manifold 18 corresponds one-to-one with the return groove 803. After deflection, the gap between the manifold groove 21 in this area and the inner wall of the second cavity 5 increases, the effective flow area increases, the return resistance decreases, and the flow rate recovers. When the pressure difference ΔP is lower than the set lower limit, it indicates that the flow resistance in this area is too small and the refrigerant flow rate is too fast, resulting in insufficient heat exchange. The control module commands the electric telescopic rod 13 to shorten, which drives the manifold 18 to deflect in the opposite direction, reducing the flow area of ​​the manifold 21, increasing the local resistance, slowing down the refrigerant flow rate, and ensuring sufficient heat exchange. During this process, the sealing gasket 23 on the side of the auxiliary plate 15 and the sealing gasket 22 on the inner wall of the second cavity 5 slide tightly together, and the elastic gaskets 29 on both sides of the manifold 18 make flexible contact with the inner wall of the second cavity 5, which not only avoids refrigerant leakage, but also buffers the vibration impact when the manifold 18 deflects, ensuring structural stability.

[0054] Refrigerant circulation and system closed loop: After being stabilized and regulated by the manifold 18, the refrigerant flows into the outlet tank 27 of the inlet and outlet water chamber 2 through the manifold 21, and finally flows out through the second connector 25, returning to the external cooling system for cooling treatment, completing a complete heat dissipation cycle. During the entire operation, the third cavity 6, through its integrated structural design, not only enhances the compressive strength of the flat tube body 1, but also assists in heat dissipation through its own thermal conductivity, further improving the overall heat dissipation effect. This mode achieves the core goals of efficient heat exchange, uniform temperature control and stable circulation through the dual closed loop of "temperature feedback - precise diversion" and "pressure feedback - stable pressure return", which is suitable for the battery heat dissipation needs under normal operating conditions of new energy vehicles.

[0055] Example 2

[0056] Both the inner walls of the first cavity 4 and the second cavity 5 are equipped with a set of water return components 8. The water return component 8 in the first cavity 4 is used to enhance the turbulence effect and improve the heat dissipation efficiency. The water return component 8 on the inner wall of the second cavity 5 is used to enhance the turbulence effect and increase the refrigerant residence time. When the battery pack is under extreme conditions such as fast charging and high temperature, the water return component 8 is used in the first cavity 4 to replace the water distribution heat dissipation component 7. The first cavity 4 and the second cavity 5 are equipped with dual water return components 8, which utilize the short ribs 801 and diagonal ribs 8 inside the dual water return components 8. 02 Further improve the turbulence effect. By enhancing turbulence and refrigerant residence time on both sides, and with the dynamic adjustment of water distribution valve 9 and manifold 18, the ultimate heat dissipation effect is achieved. The return water component 8 absorbs battery heat quickly through dense turbulence inside the first cavity 4, reducing the refrigerant temperature in advance and laying the foundation for subsequent heat exchange on the liquid return side. At the same time, since heat exchange is enhanced on both sides, the refrigerant can absorb more heat during circulation, improving the energy efficiency ratio of the refrigeration system. Under the same heat dissipation power, the energy consumption of the refrigeration system can be reduced, and the driving range of new energy vehicles can be improved.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended technical solutions and their equivalents.

Claims

1. A double-sided heat dissipation liquid cooling plate, comprising a flat tube body (1), characterized in that: The flat tube body (1) is equipped with an inlet / outlet water chamber (2) on one side, and a return water chamber (3) is equipped on the side of the flat tube body (1) away from the inlet / outlet water chamber (2). A first cavity (4) is opened on the inner wall of the flat tube body (1) near the top, a second cavity (5) is opened on the inner wall of the flat tube body (1) near the bottom, and a third cavity (6) is opened on the inner walls of the flat tube body (1) near both sides. A water distribution and heat dissipation component (7) is provided on the inner wall of the first cavity (4), and a return water component (8) is provided on the inner wall of the second cavity (5). A water distribution valve (9) is installed on the inner wall of the first cavity (4) near the inlet / outlet water chamber (2). A flow distribution plate (18) is provided on the inner wall of the second cavity (5) near the inlet / outlet water chamber (2). A flow distribution groove (21) is opened on the side of the flow distribution plate (18). An electric telescopic rod (13) is installed on the inner wall of the second cavity (5) near the inlet / outlet water chamber (2). The output end of the electric telescopic rod (13) is equipped with a slider (14), and the side of the slider (14) is slidably connected to the inner wall of the second cavity (5). The side of the slider (14) is equipped with an auxiliary plate (15), and the inner wall of the auxiliary plate (15) is equipped with a rotating frame (16). The inner wall of the rotating frame (16) is rotatably connected to a rotating plate (17). The side of the rotating plate (17) is assembled with the side of the busbar (18). The side of the auxiliary plate (15) is equipped with a sealing gasket (23). The inner wall of the second cavity (5) is equipped with a sealing gasket (22), and the side of the sealing gasket (22) adjacent to the sealing gasket (23) slides. Both sides of the busbar (18) are equipped with elastic pads (29). The slider (14) drives the rotating plate (17) to rotate through the auxiliary plate (15) and the rotating frame (16), thereby causing the busbar (18) to deflect around the rotating frame (16).

2. The double-sided heat dissipation liquid cooling plate according to claim 1, characterized in that: The water distribution heat dissipation component (7) includes a hollow water distribution plate (701), and there are several hollow water distribution plates (701), and several hollow water distribution plates (701) form a water distribution cavity (702) between each other. The inner wall of the water distribution cavity (702) is equipped with a baffle plate (703).

3. A double-sided heat dissipation liquid cooling plate according to claim 2, characterized in that: The flat tube body (1) is equipped with a main temperature sensor (704) on the top inner wall near the baffle plate (703), and the flat tube body (1) is equipped with a secondary temperature sensor (705) on the top inner wall near the water distribution valve (9), and the secondary temperature sensor (705) and the water distribution chamber (702) are on the same plane.

4. A double-sided heat dissipation liquid cooling plate according to claim 1, characterized in that: The top of the inner wall of the water distribution valve (9) is equipped with an electric telescopic rod (11), and the output end of the electric telescopic rod (11) is equipped with a baffle plate (10). The electric telescopic rod (11) is electrically connected to the adjacent main temperature sensor (704) and the adjacent secondary temperature sensor (705).

5. A double-sided heat dissipation liquid cooling plate according to claim 4, characterized in that: The water distribution valve (9) has a diversion groove (12) on one side near the first cavity (4). There are several diversion grooves (12), and the sides of two diversion grooves (12) overlap with the side of the baffle plate (10).

6. A double-sided heat dissipation liquid cooling plate according to claim 1, characterized in that: The water return assembly (8) includes a plurality of short ribs (801), and a return channel (803) is formed between the plurality of short ribs (801). The inner wall of the return channel (803) is fitted with inclined ribs (802).

7. A double-sided heat dissipation liquid cooling plate according to claim 1, characterized in that: The inner walls of the first cavity (4) and the second cavity (5) are each provided with a set of water return components (8). The water return components (8) in the first cavity (4) are used to enhance the turbulence effect and improve the heat dissipation efficiency. The water return components (8) on the inner wall of the second cavity (5) are used to enhance the turbulence effect and improve the refrigerant residence time.

8. A double-sided heat dissipation liquid cooling plate according to claim 1, characterized in that: Pressure sensor 1 (19) is installed on the inner wall of the manifold (18) near the inlet / outlet water chamber (2), and pressure sensor 2 (20) is installed on the inner wall of the manifold (18) near the return water chamber (3). There are two pressure sensors 1 (19) and two pressure sensors 2 (20), and both pressure sensors 1 (19) and two pressure sensors 2 (20) are electrically connected to the adjacent electric telescopic rod 2 (13).

9. A double-sided heat dissipation liquid cooling plate according to claim 1, characterized in that: The inner wall of the inlet / outlet chamber (2) near the top is provided with an inlet groove (26), the inner wall of the top of the inlet / outlet chamber (2) is fitted with a first connector (24), the inner wall of the inlet / outlet chamber (2) near the bottom is provided with an outlet groove (27), the inner wall of the inlet / outlet chamber (2) near the bottom is fitted with a second connector (25), the inner wall of the return water chamber (3) is provided with a return water groove (28), the inner wall of the first connector (24) passes through the inner wall of the inlet groove (26), the inner wall of the first cavity (4), the inner wall of the return water groove (28), the inner wall of the second cavity (5), and the inner wall of the outlet groove (27) in sequence and is connected to the inner wall of the second connector (25).

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