Charging pile liquid cooling system

Abstract

The utility model discloses a liquid cooling system of a charging pile, which comprises a circulating water tank and a liquid cooling circulating loop for circulating a cooling medium in the circulating water tank, the liquid cooling circulation loop is sequentially provided with a circulating pump, a liquid outlet temperature sensor, a charging module radiator, a Y-shaped filter, a surface air cooler and a speed regulation fan for carrying out air cooling heat dissipation on the surface air cooler, and the circulating pump absorbs a circulating medium with lower temperature in a circulating water tank to the charging module radiator to take away heat in the charging module radiator; the cooling medium exchanges heat with air in the environment in the surface air cooler, and the rotating speed of the speed regulation fan is controlled according to the temperature fed back by the liquid outlet temperature sensor so as to control the temperature. The structure of the liquid cooling system is greatly optimized, and the heat dissipation requirement of temperature rise caused by heating of the charging module in the high-power over-charging pile is met.

Description

[0001] This utility model claims priority to Chinese invention patent application 2025105611584 entitled "A Liquid Cooling System for Charging Piles", filed with the China National Intellectual Property Administration on April 30, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This utility model relates to the field of fast charging technology for automobiles, and in particular to a liquid cooling system for charging piles. Background Technology

[0003] In recent years, ultra-fast charging technology has become a research hotspot in the automotive industry. Ultra-fast charging technology (such as BYD's 10C peak supercharger) can achieve 80% SOC charging within 10 minutes, significantly shortening charging time and solving range anxiety.

[0004] Multiple companies are accelerating the rollout of ultra-fast charging vehicles, while Huawei and others are driving ecosystem upgrades, creating a technological race. The heat dissipation issue in ultra-fast charging primarily stems from the thermal effects of high current and high voltage, as well as insufficient heat dissipation design in the devices. The following is a detailed analysis and solutions:

[0005] Ultra-fast charging technology significantly accelerates charging speed by increasing current (such as 500A) and voltage, but the rate at which electrical energy inside the battery is converted into heat energy also increases, especially in high-temperature environments.

[0006] With the rapid release of high-voltage fast-charging models of new energy vehicles, companies are accelerating their deployment of high-power supercharging stations. However, the overheating of the charging modules within these stations, leading to elevated temperatures, is one of the problems that needs to be addressed. Utility Model Content

[0007] The purpose of this invention is to provide a liquid cooling system for charging piles to solve the problem of excessive temperature rise caused by the overheating of the charging module inside high-power supercharging piles.

[0008] To address this, the present invention provides a liquid cooling system for charging piles, comprising a circulating water tank and a liquid cooling circulation loop for circulating the cooling medium in the circulating water tank. The liquid cooling circulation loop is sequentially equipped with a circulating pump, an outlet temperature sensor, a charging module heat sink, a Y-type filter, a surface cooler, and a speed-regulating fan for air cooling the surface cooler. The circulating pump draws the lower-temperature circulating medium from the circulating water tank to the charging module heat sink to remove the heat. The cooling medium exchanges heat with the ambient air in the surface cooler, and the speed of the speed-regulating fan is controlled according to the temperature feedback from the outlet temperature sensor to control the temperature.

[0009] Furthermore, the aforementioned circulating water tank is equipped with a liquid level sensor, an automatic air vent valve, a drain ball valve, and a fill ball valve. The liquid level sensor is used to detect whether the medium in the circulating water tank is sufficient, and the automatic air vent valve is used to automatically vent the circulating water tank.

[0010] Furthermore, the liquid cooling circulation loop is also equipped with a return temperature sensor to detect the temperature of the cooling medium after passing through the charging module heat sink.

[0011] Furthermore, the flow rate of the aforementioned circulating pump is adjustable, and the flow rate of the circulating pump is controlled based on the temperature feedback from the return liquid temperature sensor.

[0012] Furthermore, the liquid cooling circulation loop is also equipped with an outlet pressure sensor to detect the pressure at the outlet of the circulation pump.

[0013] Furthermore, the aforementioned speed-regulating fan is an EC fan employing electronic commutation technology.

[0014] This utility model also provides a liquid cooling system for charging piles, including a circulating water tank and a liquid cooling circulation loop for circulating the cooling medium in the circulating water tank. The liquid cooling circulation loop is sequentially equipped with a circulating pump, an outlet temperature sensor, a charging module heat sink, a Y-type filter, a surface cooler, and a speed-regulating fan for air cooling the surface cooler. The circulating pump draws the lower-temperature circulating medium from the circulating water tank to the charging module heat sink to remove the heat. The cooling medium exchanges heat with the ambient air in the surface cooler. The detection signal of the outlet temperature sensor is connected to the speed-regulating fan for feedback control of the cooling medium temperature.

[0015] Furthermore, the aforementioned circulating water tank is equipped with a liquid level sensor, an automatic air vent valve, a drain ball valve, and a fill ball valve. The liquid level sensor is used to detect whether the medium in the circulating water tank is sufficient, and the automatic air vent valve is used to automatically vent the circulating water tank.

[0016] Furthermore, the liquid cooling circulation loop is also equipped with a return temperature sensor to detect the temperature of the cooling medium after passing through the charging module heat sink.

[0017] Furthermore, the liquid cooling circulation loop is also equipped with an outlet pressure sensor to detect the pressure at the outlet of the circulation pump.

[0018] Compared with existing heat dissipation methods, this utility model adopts a circulating cooling medium and temperature control method to remove the heat from the heat sink of the charging module inside the supercharging pile. The structure of this heat dissipation method is greatly optimized and can meet the heat dissipation requirements of the charging module inside the high-power supercharging pile that causes the temperature to rise due to heat generation.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the liquid cooling system for the charging pile of this utility model.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. EC speed-regulating fan; 2. Surface cooler; 3. Y-type filter; 4. Return liquid temperature sensor; 5. Charging module; 6. Discharge pressure sensor; 7. Discharge temperature sensor; 8. Circulation pump; 9. Drain ball valve; 10. Circulating water tank; 11. Liquid level sensor; 12. Automatic air vent valve; 13. Liquid filling ball valve. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figure 1 As shown, the liquid cooling system of the charging pile in this embodiment mainly consists of an EC speed-regulating fan 1, a surface cooler 2, a Y-type filter 3, a return liquid temperature sensor 4, a charging module heat sink 5, an outlet liquid pressure sensor 6, an outlet liquid temperature sensor 7, a circulation pump 8, a drain ball valve 9, a circulating water tank 10, a liquid level sensor 11, an automatic air vent valve 12, and a liquid filling ball valve 13.

[0026] EC speed-regulating fan: also known as an electronically commutated fan, it uses a DC brushless motor and controls the motor's operation through an electronic commutation circuit. It has excellent speed regulation performance, and the motor speed can be precisely adjusted by changing the frequency or duty cycle of the input power supply. It has a wide speed range and can achieve stepless speed regulation from 0-100%.

[0027] Liquid cooling medium is the core material used to transfer heat in a liquid cooling system, and its selection and characteristics directly affect heat dissipation efficiency. Ethylene glycol aqueous solution is selected, and the concentration of ethylene glycol (e.g., 30%-60% water) is adjusted to meet different temperature requirements.

[0028] The circulating pump 8 draws cooler circulating medium from the circulating water tank 10 and transfers it to the charging module heat sink 5 in the charging pile to remove heat. This causes the temperature of the circulating medium to rise. The circulating medium exchanges heat with the ambient air in the surface cooler 2 and is dissipated to the environment by the EC speed-regulating fan 1. Simultaneously, the control system controls the speed of the EC speed-regulating fan 1 based on the temperature feedback from the outlet liquid temperature sensor 7 to achieve temperature control.

[0029] Functions of auxiliary components in the system: Y-type filter 3 filters impurities in the system. Return liquid temperature sensor 4 detects the return liquid temperature. The charging module radiator 5 in the high-power supercharging pile liquid cooling system is the object cooled by the cooling medium. Outlet pressure sensor 6 detects the pressure at the equipment outlet. Drain ball valve 9 opens to release cooling medium when needed. Circulating water tank 10 stores the cooling medium. Liquid level sensor 11 detects whether the medium in the circulating water tank is sufficient. Automatic vent valve 12 automatically vents air. Adding ball valve 13 opens when cooling medium needs to be added.

[0030] In one embodiment, the circulating pump 8 is selected as a medium pump with adjustable flow parameters, and the flow rate of the circulating pump 8 is controlled according to the temperature feedback from the return liquid temperature sensor 4. When the temperature feedback from the return liquid temperature sensor 4 exceeds the limit, the flow rate of the circulating pump 8 is increased.

[0031] The above description is merely an embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A charging pile liquid cooling system, characterized in that, Includes a circulating water tank (10) and a liquid-cooled circulation loop for circulating the cooling medium in the circulating water tank (10). The liquid cooling circulation loop is sequentially equipped with a circulation pump (8), an outlet temperature sensor (7), a charging module heat sink (5), a Y-type filter (3), a surface cooler (2), and a speed-regulating fan (1) for air cooling the surface cooler (2). The circulating pump (8) draws a low-temperature circulating medium from the circulating water tank (10) to the charging module heat sink (5) to remove the heat. The cooling medium exchanges heat with the air in the environment in the surface cooler (2), and controls the speed of the speed-regulating fan (1) according to the temperature feedback from the liquid outlet temperature sensor (7) to control the temperature.

2. The charging pile liquid cooling system according to claim 1, characterized in that, The circulating water tank (10) is equipped with a liquid level sensor (11), an automatic air vent valve (12), a drain ball valve (9), and a fill ball valve (13). The liquid level sensor (11) is used to detect whether the medium in the circulating water tank is sufficient, and the automatic air vent valve (12) is used to automatically vent the circulating water tank.

3. The charging pile liquid cooling system according to claim 1, characterized in that, The liquid cooling circulation loop is also equipped with a return liquid temperature sensor (4) to detect the temperature of the cooling medium after passing through the charging module heat sink (5).

4. The charging pile liquid cooling system according to claim 1, characterized in that, The flow rate of the circulating pump (8) is adjustable, and the flow rate of the circulating pump (8) is controlled according to the temperature feedback from the return liquid temperature sensor (4).

5. The charging pile liquid cooling system according to claim 1, characterized in that, The liquid cooling circulation loop is also equipped with an outlet pressure sensor (6) to detect the pressure at the outlet of the circulation pump (8).

6. The charging pile liquid cooling system according to claim 1, characterized in that, The speed-regulating fan (1) is an EC fan that uses electronic commutation technology.

7. A charging pile liquid cooling system, characterized in that, Includes a circulating water tank (10) and a liquid-cooled circulation loop for circulating the cooling medium in the circulating water tank (10). The liquid cooling circulation loop is sequentially equipped with a circulation pump (8), an outlet temperature sensor (7), a charging module heat sink (5), a Y-type filter (3), a surface cooler (2), and a speed-regulating fan (1) for air cooling the surface cooler (2). The circulating pump (8) draws a low-temperature circulating medium from the circulating water tank (10) to the charging module heat sink (5) to remove the heat. The cooling medium exchanges heat with the air in the environment in the surface cooler (2). The outlet temperature sensor (7) is connected to the speed-regulating fan (1) for feedback control of the cooling medium temperature.

8. The charging pile liquid cooling system according to claim 7, characterized in that, The circulating water tank (10) is equipped with a liquid level sensor (11), an automatic air vent valve (12), a drain ball valve (9), and a fill ball valve (13), wherein, The liquid level sensor (11) is used to detect whether the medium in the circulating water tank is sufficient, and the automatic air vent valve (12) is used to automatically vent the circulating water tank.

9. The charging pile liquid cooling system according to claim 7, characterized in that, The liquid cooling circulation loop is also equipped with a return liquid temperature sensor (4) to detect the temperature of the cooling medium after passing through the charging module heat sink (5).

10. The charging pile liquid cooling system according to claim 7, characterized in that, The liquid cooling circulation loop is also equipped with an outlet pressure sensor (6) to detect the pressure at the outlet of the circulation pump (8).

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