Liquid cooling unit for dynamically adjusting charging power of overcharge double guns of electric vehicle and control method

Abstract

The invention discloses a liquid cooling unit capable of dynamically adjusting the charging power of double overcharge guns of an electric vehicle and a control method of the liquid cooling unit. The liquid cooling unit comprises an oil tank, a liquid supply unit A, a liquid supply unit B, a backflow unit A, a backflow unit B and a confluence unit. The control method comprises the following steps of dynamically adjusting the flow of a liquid cooling medium, dynamically adjusting the heat dissipation air volume, carrying out gun line liquid cooling and dynamically preheating. The circulating pump A and the circulating pump B are connected in parallel, liquid cooling media are provided for the two gun lines respectively, heat of the gun lines is taken away in real time, parameters of the double gun lines can be effectively decoupled, and mutual influence of temperature and pressure is avoided; the problem of condensation of the electrical module caused by overlarge temperature deviation of the two paths of media is avoided; through cooperative use of the PLC, the pressure sensor A, the temperature sensor A, the pressure sensor B and the temperature sensor B, the medium flow of the double guns can be dynamically adjusted in real time according to actual working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle supercharging piles, and in particular to a liquid cooling unit and a control method for dynamically adjusting the charging power of dual supercharging guns of an electric vehicle. Background Art

[0002] With the popularity of electric vehicles and the need to shorten charging time, supercharging technology has developed rapidly in the charging pile industry. Currently, the single-pile dual-gun design (a single charging pile with two charging guns) has become the mainstream in the domestic and international liquid-cooled charging pile market, which means that a set of liquid cooling devices needs to meet the cooling needs of two gun lines.

[0003] The dual-gun liquid cooling devices currently on the market generally only increase the heat dissipation power compared to the single-gun system, and adopt a dual-gun simultaneous cooling solution, such as Figure 2 As shown, as long as the liquid cooling device is working, the two gun lines will be cooled at the same time. Regardless of whether one of the guns is working (only one gun is charging), and how much difference there is in the actual power of the two guns (for example, one gun is charging at 500A and the other gun is charging at 200A), the system always provides basically even cooling medium to the two gun lines at the same time.

[0004] However, the above dual-gun simultaneous cooling solution has the following disadvantages:

[0005] 1. A considerable amount of output power is wasted (non-working gun lines are also forced into circulation, and a large amount of medium is diverted);

[0006] 2. System temperature monitoring is prone to distortion: When the working conditions of the two gun lines are inconsistent, the low-temperature oil of the non-working gun line or the low-power gun line will reduce the oil temperature value of the working or high-power gun line outlet, causing system misjudgment;

[0007] 3. Under low temperature conditions, the pressure of the non-working bypass will increase, which will cause the pressure of the entire system to rise, affecting system performance;

[0008] 4. Under certain working conditions, the problem of condensation in the electrical module may occur, affecting the safety of the system. When the medium temperature is low, if one gun is not working, the temperature rise rate of the medium in the gun line will be much lower than that of the medium in the working gun line. At the same time, because the other gun is working, the public electrical module begins to heat up and the pile body has a certain temperature control device, the air at the electrical module will be higher. Therefore, when the medium in the non-working gun line flows through the electrical module, the water vapor in the air near the module condenses when it is cold, and a "sweating" phenomenon occurs. The condensed water gathers on the surface of the electrical module, resulting in a decrease in the insulation performance of the module. In severe cases, the module may explode and be damaged.

[0009] To this end, a liquid cooling unit and a control method for dynamically adjusting the charging power of dual-gun supercharging of electric vehicles are proposed. Summary of the invention

[0010] The technical task of the present invention is to address the above shortcomings and provide a liquid cooling unit and control method for dynamically adjusting the charging power of dual-gun supercharging of electric vehicles, which can realize dynamic adjustment and real-time response of each gun line at different powers when dual guns are charged at the same time, improve operating efficiency and avoid condensation and other phenomena.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A liquid cooling unit for dynamically adjusting charging power of dual-gun superchargers of an electric vehicle, comprising: a fuel tank, a liquid supply unit A, a liquid supply unit B, a reflux unit A, a reflux unit B and a merging unit;

[0013] Wherein, the oil tank is used to contain liquid cooling medium;

[0014] The liquid supply unit A is used to supply the liquid cooling medium in the fuel tank to the electric vehicle supercharging gun line A, and the liquid supply unit A is connected between the fuel tank and the liquid inlet of the electric vehicle supercharging gun line A;

[0015] The liquid supply unit B is used to supply the liquid cooling medium in the fuel tank to the electric vehicle supercharging gun line B, and the liquid supply unit B is connected between the fuel tank and the liquid inlet of the electric vehicle supercharging gun line B;

[0016] The reflux unit A is used to return the liquid cooling medium of the electric vehicle supercharging gun line A to the fuel tank, and the reflux unit A is connected between the fuel tank and the liquid return port of the electric vehicle supercharging gun line A;

[0017] The reflux unit B is used to return the liquid cooling medium of the electric vehicle supercharging gun line B to the fuel tank, and the reflux unit B is connected between the fuel tank and the liquid return port of the electric vehicle supercharging gun line B;

[0018] The merging unit is used to merge the liquid cooling medium of the reflux unit A and the reflux unit B and perform heat dissipation processing, and the merging unit is connected to the oil tank, and the reflux unit A and the reflux unit B are both connected to the merging unit.

[0019] Preferably, the liquid supply unit A includes a liquid supply pipe A, one end of which is connected to the liquid inlet of the gun line A, and the other end of which is connected to the liquid outlet of the oil tank. A circulating pump A, a pressure sensor A and a temperature sensor A are installed on the liquid supply pipe A in sequence along the liquid cooling medium conveying direction.

[0020] Preferably, the liquid supply unit B includes a liquid supply pipe B arranged in parallel with the liquid supply pipe A, one end of the liquid supply pipe B is connected to the liquid inlet of the gun line B, and the other end of the liquid supply pipe B is connected to the liquid outlet of the oil tank, and a circulating pump B, a pressure sensor B and a temperature sensor B are installed on the liquid supply pipe B in sequence along the liquid cooling medium conveying direction.

[0021] Preferably, the reflux unit A comprises a reflux pipe A, two branch pipes A are connected in parallel between one end of the reflux pipe A and a liquid return port of the gun line A, and a temperature sensor C is installed on the reflux pipe A.

[0022] Preferably, the reflux unit B comprises a reflux pipe B arranged in parallel with the reflux pipe A, two branch pipes B are connected in parallel between one end of the reflux pipe B and the return liquid port of the gun line B, and a temperature sensor D is installed on the reflux pipe B.

[0023] Preferably, the merging unit includes a merging pipe, one end of which is connected to the return liquid port of the oil tank, one end of the return pipe A away from branch pipe A and one end of the return pipe B away from branch pipe B are connected to the other end of the merging pipe, and a radiator is installed on the merging pipe.

[0024] Preferably, a flow channel A for the liquid cooling medium of the gun line A is formed between the oil tank, the liquid supply pipe A, the liquid inlet of the gun line A, the liquid return port of the gun line A, the branch pipe A, the reflux pipe A and the converging pipe, and a flow channel B for the liquid cooling medium of the gun line B is formed between the oil tank, the liquid supply pipe B, the liquid inlet of the gun line B, the liquid return port of the gun line B, the branch pipe B, the reflux pipe B and the converging pipe.

[0025] Preferably, a heater is installed in the inner cavity of the oil tank.

[0026] Preferably, a PLC controller is also included, and the circulating pump A, pressure sensor A, temperature sensor A, circulating pump B, pressure sensor B, temperature sensor B, temperature sensor C, temperature sensor D, radiator and heater are electrically connected to the PLC controller respectively, and the PLC controller is electrically connected to the electric vehicle supercharging pile.

[0027] The present invention also provides a control method for a liquid cooling unit for dynamically adjusting the charging power of dual supercharging guns of an electric vehicle, which adopts the liquid cooling unit for dynamically adjusting the charging power of dual supercharging guns of an electric vehicle as described above, and comprises the following steps:

[0028] S1. Dynamically adjust the flow rate of liquid cooling medium: The PLC controller starts to operate autonomously after receiving the operation command from the electric vehicle supercharging pile. The PLC controller monitors the actual working condition of the gun line A in real time through the pressure sensor A and the temperature sensor A, and monitors the actual working condition of the gun line B through the pressure sensor B and the temperature sensor B. According to the actual operating conditions of each gun line, the speed of the circulating pump A and the circulating pump B are automatically matched, that is, the liquid cooling medium flow rate required for each gun line is dynamically adjusted;

[0029] S2. Dynamically adjust the cooling air volume: The PLC controller monitors the temperature of the liquid cooling medium after absorbing heat in real time through temperature sensor C and temperature sensor D, and automatically matches the speed of the radiator fan, that is, the cooling air volume changes dynamically with the temperature, avoiding rapid temperature changes of the liquid cooling medium, until the PLC controller receives the shutdown command;

[0030] S3, gun line liquid cooling: when the circulation pump A is in operation, the circulation pump A transports the liquid cooling medium in the oil tank to the gun line A through the liquid supply pipe A and the liquid inlet of the gun line A, so as to provide the liquid cooling medium to the gun line A, so that the liquid cooling medium takes away the heat of the gun line A, and the liquid cooling medium after absorbing the heat is then transported to the confluence pipe through the return liquid port of the gun line A, the branch pipe A and the temperature sensor C, and the heat is dissipated by the radiator, so that the liquid cooling medium is cooled and then flows back to the inner cavity of the oil tank through the confluence pipe; similarly, when the circulation pump B is in operation, the liquid cooling medium can be provided to the gun line B, and the liquid cooling medium finally flows back to the inner cavity of the oil tank, that is, the liquid cooling treatment of each gun line is realized;

[0031] S4, dynamic preheating: Start the heater to dynamically preheat the liquid cooling medium in the oil tank when the ambient temperature is too low, so that the temperature of the liquid cooling medium can quickly meet the actual demand.

[0032] Compared with the prior art, the advantages and positive effects of the present invention are:

[0033] 1. The present invention mainly consists of an oil tank, a liquid supply unit A, a liquid supply unit B, a reflux unit A, a reflux unit B and a confluence unit. The circulating pump A and the circulating pump B are connected in parallel to provide liquid cooling medium to the two gun lines respectively, and take away the heat of the gun lines in real time, so that the parameters of the two gun lines can be effectively decoupled to avoid the mutual influence of temperature and pressure; to avoid excessive temperature deviation of the two-way medium, which leads to condensation problems in the electrical module;

[0034] 2. The present invention, through the coordinated use of a PLC controller, pressure sensor A, temperature sensor A, pressure sensor B and temperature sensor B, enables the medium flow of the dual guns to be dynamically adjusted in real time according to actual working conditions; through the coordinated use of a PLC controller, temperature sensor C and temperature sensor D, the air volume of the radiator can be dynamically adjusted in real time according to actual working conditions; the actual utilization efficiency is significantly increased, and ineffective consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a flow chart of a liquid cooling unit for dynamically adjusting charging power of dual-gun superchargers for electric vehicles according to an embodiment of the present invention;

[0037] Figure 2 The figure is a flow chart of simultaneous cooling of two guns in the prior art.

[0038] In the figure: 100, oil tank; 200, liquid supply unit A; 210, liquid supply pipe A; 220, circulation pump A; 230, pressure sensor A; 240, temperature sensor A; 300, liquid supply unit B; 310, liquid supply pipe B; 320, circulation pump B; 330, pressure sensor B; 340, temperature sensor B; 400, reflux unit A; 410, reflux pipe A; 420, branch pipe A; 430, temperature sensor C; 500, reflux unit B; 510, reflux pipe B; 520, branch pipe B; 530, temperature sensor D; 600, confluence unit; 610, confluence pipe; 620, radiator; 700, heater; 800, PLC controller. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] like Figure 1 As shown, a liquid cooling unit for dynamically adjusting the charging power of dual-gun superchargers of an electric vehicle according to an embodiment of the present invention includes: a fuel tank 100, a liquid supply unit A200, a liquid supply unit B300, a reflux unit A400, a reflux unit B500 and a merging unit 600;

[0043] The oil tank 100 is used to contain liquid cooling medium;

[0044] The liquid supply unit A200 is used to supply the liquid cooling medium in the fuel tank 100 to the electric vehicle supercharging gun line A, and the liquid supply unit A200 is connected between the fuel tank 100 and the liquid inlet of the electric vehicle supercharging gun line A;

[0045] The liquid supply unit B300 is used to supply the liquid cooling medium in the fuel tank 100 to the electric vehicle supercharging gun line B, and the liquid supply unit B300 is connected between the fuel tank 100 and the liquid inlet of the electric vehicle supercharging gun line B;

[0046] The reflux unit A400 is used to reflux the liquid cooling medium of the electric vehicle supercharging gun line A into the fuel tank 100, and the reflux unit A400 is connected between the fuel tank 100 and the liquid return port of the electric vehicle supercharging gun line A;

[0047] The reflux unit B500 is used to reflux the liquid cooling medium of the electric vehicle supercharging gun line B into the fuel tank 100, and the reflux unit B500 is connected between the fuel tank 100 and the liquid return port of the electric vehicle supercharging gun line B;

[0048] The merging unit 600 is used to merge the liquid cooling medium of the reflux unit A400 and the reflux unit B500 and perform heat dissipation processing, and the merging unit 600 is connected to the oil tank 100, and the reflux unit A400 and the reflux unit B500 are both connected to the merging unit 600.

[0049] The liquid supply unit A200 includes a liquid supply pipe A210, one end of which is connected to the liquid inlet of the gun line A, and the other end of the liquid supply pipe A210 is connected to the liquid outlet of the oil tank 100. A circulating pump A220, a pressure sensor A230 and a temperature sensor A240 are installed on the liquid supply pipe A210 in sequence along the liquid cooling medium conveying direction.

[0050] Specifically, in this embodiment, the liquid supply unit B300 includes a liquid supply pipe B310 arranged in parallel with the liquid supply pipe A210, one end of the liquid supply pipe B310 is connected to the liquid inlet of the gun line B, and the other end of the liquid supply pipe B310 is connected to the liquid outlet of the oil tank 100, and a circulating pump B320, a pressure sensor B330 and a temperature sensor B340 are installed on the liquid supply pipe B310 in sequence along the liquid cooling medium conveying direction.

[0051] Specifically, in this embodiment, the reflux unit A400 includes a reflux pipe A410, two branch pipes A420 are connected in parallel between one end of the reflux pipe A410 and the return liquid port of the gun line A, and a temperature sensor C430 is installed on the reflux pipe A410.

[0052] Specifically, in this embodiment, the reflux unit B500 includes a reflux pipe B510 arranged in parallel with the reflux pipe A410, two branch pipes B520 are connected in parallel between one end of the reflux pipe B510 and the return liquid port of the gun line B, and a temperature sensor D530 is installed on the reflux pipe B510.

[0053] Specifically, in this embodiment, the merging unit 600 includes a merging pipe 610, one end of which is connected to the return liquid port of the oil tank 100, one end of the return pipe A410 away from the branch pipe A420 and one end of the return pipe B510 away from the branch pipe B520 are connected to the other end of the merging pipe 610, and a radiator 620 is installed on the merging pipe 610.

[0054] Specifically, in the present embodiment, a flow channel A for the liquid cooling medium of the gun line A is formed between the oil tank 100, the liquid supply pipe A210, the liquid inlet of the gun line A, the liquid return port of the gun line A, the branch pipe A420, the return pipe A410 and the converging pipe 610, and a flow channel B for the liquid cooling medium of the gun line B is formed between the oil tank 100, the liquid supply pipe B310, the liquid inlet of the gun line B, the liquid return port of the gun line B, the branch pipe B520, the return pipe B510 and the converging pipe 610.

[0055] Specifically, in this embodiment, a heater 700 is installed in the inner cavity of the oil tank 100. The heater 700 can dynamically preheat the liquid cooling medium in the oil tank 100 when the ambient temperature is too low, so that the temperature of the liquid cooling medium can quickly meet actual needs.

[0056] Specifically, in this embodiment, a PLC controller 800 is also included, and a circulating pump A220, a pressure sensor A230, a temperature sensor A240, a circulating pump B320, a pressure sensor B330, a temperature sensor B340, a temperature sensor C430, a temperature sensor D530, a radiator 620, and a heater 700 are electrically connected to the PLC controller 800, respectively, and the PLC controller 800 is electrically connected to the electric vehicle super charging pile. The PLC controller 800 can control the electric vehicle super charging pile according to the pressure sensor A230, the temperature sensor A240, the pressure sensor B330, and the temperature sensor B340. , temperature sensor C430 and temperature sensor D530 monitor the actual working conditions of the double-gun gun line, so as to automatically control the circulation pump A220, circulation pump B320 and radiator 620 as needed. The PLC controller 800 can adopt the PLC controller with model 6ES72350KD220XA8, the temperature sensor A240, temperature sensor B340, temperature sensor C430 and temperature sensor D530 can all adopt the PT1000 temperature sensor, the pressure sensor A230 and pressure sensor B330 can both adopt the PT1000 pressure sensor.

[0057] Example 2

[0058] The present embodiment provides a control method for a liquid cooling unit for dynamically adjusting the charging power of dual supercharging guns of an electric vehicle, using the above-mentioned liquid cooling unit for dynamically adjusting the charging power of dual supercharging guns of an electric vehicle, including the following steps:

[0059] S1. Dynamically adjust the flow rate of liquid cooling medium: After receiving the operation command from the electric vehicle supercharging pile, the PLC controller 800 starts to operate autonomously. The PLC controller 800 monitors the actual working condition of the gun line A in real time through the pressure sensor A230 and the temperature sensor A240, and monitors the actual working condition of the gun line B through the pressure sensor B330 and the temperature sensor B340. According to the actual operating conditions of each gun line, the speed of the circulating pump A220 and the circulating pump B320 are automatically matched, that is, the liquid cooling medium flow rate required for each gun line is dynamically adjusted;

[0060] S2. Dynamically adjust the cooling air volume: The PLC controller 800 monitors the temperature of the liquid cooling medium after absorbing heat in real time through the temperature sensor C430 and the temperature sensor D530, and automatically matches the speed of the fan of the radiator 620, that is, the cooling air volume changes dynamically with the temperature, avoiding rapid temperature changes of the liquid cooling medium, until the PLC controller 800 receives the shutdown command to end;

[0061] S3, gun line liquid cooling: when the circulation pump A220 is in operation, the circulation pump A220 transports the liquid cooling medium in the oil tank 100 to the gun line A through the liquid supply pipe A210 and the liquid inlet of the gun line A, so as to provide the liquid cooling medium to the gun line A, so that the liquid cooling medium takes away the heat of the gun line A, and the liquid cooling medium after absorbing the heat is then transported to the confluence pipe 610 through the liquid return port of the gun line A, the branch pipe A420 and the temperature sensor C430, and the heat is dissipated by the radiator 620, so that the liquid cooling medium is cooled and then flows back to the inner cavity of the oil tank 100 from the confluence pipe 610; similarly, when the circulation pump B320 is in operation, the liquid cooling medium can be provided to the gun line B, and the liquid cooling medium finally flows back to the inner cavity of the oil tank 100, that is, the liquid cooling treatment of each gun line is realized;

[0062] S4, dynamic preheating: starting the heater 700 can dynamically preheat the liquid cooling medium in the oil tank 100 when the ambient temperature is too low, so that the temperature of the liquid cooling medium can quickly meet the actual demand.

[0063] In summary, the liquid cooling unit for dynamic adjustment of the charging power of the electric vehicle supercharging dual guns and its control method can realize dynamic adjustment and real-time response of each gun line at different powers when the dual guns are charged at the same time, improve operating efficiency and avoid condensation and other phenomena.

[0064] Through the above specific implementations, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the above specific implementations. On the basis of the disclosed implementations, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A liquid cooling unit with dynamic adjustment of charging power of dual-gun supercharging for electric vehicles, characterized in that: include: An oil tank (100), a liquid supply unit A (200), a liquid supply unit B (300), a reflux unit A (400), a reflux unit B (500), and a merging unit (600), wherein: The oil tank (100) is used to contain liquid cooling medium; The liquid supply unit A (200) is used to supply the liquid cooling medium in the oil tank (100) to the electric vehicle supercharging gun line A, and the liquid supply unit A (200) is connected between the oil tank (100) and the liquid inlet of the electric vehicle supercharging gun line A; The liquid supply unit B (300) is used to supply the liquid cooling medium in the oil tank (100) to the electric vehicle supercharging gun line B, and the liquid supply unit B (300) is connected between the oil tank (100) and the liquid inlet of the electric vehicle supercharging gun line B; The reflux unit A (400) is used to reflux the liquid cooling medium of the electric vehicle supercharging gun line A into the oil tank (100), and the reflux unit A (400) is connected between the oil tank (100) and the liquid return port of the electric vehicle supercharging gun line A; The reflux unit B (500) is used to reflux the liquid cooling medium of the electric vehicle supercharging gun line B into the oil tank (100), and the reflux unit B (500) is connected between the oil tank (100) and the liquid return port of the electric vehicle supercharging gun line B; The merging unit (600) is used to merge the liquid cooling medium of the reflux unit A (400) and the reflux unit B (500) and perform heat dissipation processing, and the merging unit (600) is connected to the oil tank (100), and the reflux unit A (400) and the reflux unit B (500) are both connected to the merging unit (600).

2. The liquid cooling unit with dynamic adjustment of charging power of dual-gun supercharging for electric vehicles according to claim 1 is characterized by: The liquid supply unit A (200) includes a liquid supply pipe A (210), one end of which is connected to the liquid inlet of the gun line A, and the other end of which is connected to the liquid outlet of the oil tank (100). A circulating pump A (220), a pressure sensor A (230) and a temperature sensor A (240) are sequentially installed on the liquid supply pipe A (210) along the direction of liquid cooling medium transportation.

3. The liquid cooling unit with dynamic adjustment of charging power of dual-gun supercharging for electric vehicles according to claim 2 is characterized by: The liquid supply unit B (300) includes a liquid supply pipe B (310) arranged in parallel with the liquid supply pipe A (210), one end of the liquid supply pipe B (310) is connected to the liquid inlet of the gun line B, and the other end of the liquid supply pipe B (310) is connected to the liquid outlet of the oil tank (100). A circulating pump B (320), a pressure sensor B (330) and a temperature sensor B (340) are installed on the liquid supply pipe B (310) in sequence along the direction of liquid cooling medium transportation.

4. The liquid cooling unit with dynamic adjustment of charging power of dual-gun supercharging for electric vehicles according to claim 3 is characterized by: The reflux unit A (400) includes a reflux pipe A (410), two branch pipes A (420) are connected in parallel between one end of the reflux pipe A (410) and the return liquid port of the gun line A, and a temperature sensor C (430) is installed on the reflux pipe A (410).

5. The liquid cooling unit with dynamic adjustment of charging power of dual-gun supercharging for electric vehicles according to claim 4 is characterized in that: The reflux unit B (500) includes a reflux pipe B (510) arranged in parallel with the reflux pipe A (410), two branch pipes B (520) are connected in parallel between one end of the reflux pipe B (510) and the return liquid port of the gun line B, and a temperature sensor D (530) is installed on the reflux pipe B (510).

6. The liquid cooling unit with dynamic adjustment of charging power of dual-gun supercharging for electric vehicles according to claim 5 is characterized by: The merging unit (600) includes a merging pipe (610), one end of which is connected to the liquid return port of the oil tank (100), and one end of the return pipe A (410) away from the branch pipe A (420) and one end of the return pipe B (510) away from the branch pipe B (520) are both connected to the other end of the merging pipe (610). A radiator (620) is installed on the merging pipe (610).

7. The liquid cooling unit with dynamic adjustment of charging power of dual-gun supercharging for electric vehicles according to claim 6 is characterized by: A circulation channel A for the liquid cooling medium of the gun line A is formed between the oil tank (100), the liquid supply pipe A (210), the liquid inlet of the gun line A, the liquid return port of the gun line A, the branch pipe A (420), the return pipe A (410) and the converging pipe (610); and a circulation channel B for the liquid cooling medium of the gun line B is formed between the oil tank (100), the liquid supply pipe B (310), the liquid inlet of the gun line B, the liquid return port of the gun line B, the branch pipe B (520), the return pipe B (510) and the converging pipe (610).

8. The liquid cooling unit with dynamic adjustment of charging power of dual-gun supercharging for electric vehicles according to claim 7 is characterized by: A heater (700) is installed in the inner cavity of the oil tank (100).

9. The liquid cooling unit with dynamic adjustment of charging power of dual-gun supercharging for electric vehicles according to claim 8, characterized in that: The invention also includes a PLC controller (800), wherein the circulating pump A (220), the pressure sensor A (230), the temperature sensor A (240), the circulating pump B (320), the pressure sensor B (330), the temperature sensor B (340), the temperature sensor C (430), the temperature sensor D (530), the radiator (620) and the heater (700) are electrically connected to the PLC controller (800), respectively, and the PLC controller (800) is electrically connected to the electric vehicle supercharging pile.

10. A control method for a liquid cooling unit with dynamic adjustment of charging power of dual supercharging guns of an electric vehicle, using the liquid cooling unit with dynamic adjustment of charging power of dual supercharging guns of an electric vehicle according to any one of claims 1 to 9, characterized in that: The steps include: S1. Dynamic adjustment of the flow rate of the liquid cooling medium: the PLC controller (800) starts to operate autonomously after receiving the operation command issued by the electric vehicle super charging pile. The PLC controller (800) monitors the actual working condition of the gun line A in real time through the pressure sensor A (230) and the temperature sensor A (240), and monitors the actual working condition of the gun line B through the pressure sensor B (330) and the temperature sensor B (340). According to the actual operating conditions of each gun line, the speed of the circulation pump A (220) and the circulation pump B (320) are automatically matched, that is, the flow rate of the liquid cooling medium required by each gun line is dynamically adjusted; S2. Dynamically adjust the cooling air volume: the PLC controller (800) monitors the temperature of the liquid cooling medium after absorbing heat in real time through the temperature sensor C (430) and the temperature sensor D (530), and automatically matches the speed of the radiator (620) fan, that is, the cooling air volume changes dynamically with the temperature, avoiding rapid temperature changes of the liquid cooling medium, until the PLC controller (800) receives the shutdown command; S3. Gun line liquid cooling: When the circulating pump A (220) is in operation, the circulating pump A (220) transports the liquid cooling medium in the oil tank (100) to the gun line A through the liquid supply pipe A (210) and the liquid inlet of the gun line A, thereby providing the liquid cooling medium to the gun line A, so that the liquid cooling medium takes away the heat of the gun line A. The liquid cooling medium after absorbing the heat is then transported to the confluence pipe (610) through the liquid return port of the gun line A, the branch pipe A (420) and the temperature sensor C (430), and is heat-dissipated by the radiator (620), so that the liquid cooling medium is cooled and then flows back to the inner cavity of the oil tank (100) through the confluence pipe (610); similarly, when the circulating pump B (320) is in operation, the liquid cooling medium can be provided to the gun line B, and the liquid cooling medium finally flows back to the inner cavity of the oil tank (100), thus achieving liquid cooling treatment for each gun line; S4, dynamic preheating: starting the heater (700) to dynamically preheat the liquid cooling medium in the oil tank (100) when the ambient temperature is too low, so that the temperature of the liquid cooling medium can quickly meet actual needs.

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