Temperature control method, device, equipment and storage medium of charging device

Abstract

The application provides a temperature control method, device and equipment of a charging device and a storage medium. It relates to the technical field of vehicles. The method comprises the following steps: acquiring the temperature of cooling liquid flowing into the inlet of a charging gun, the temperature of cooling liquid flowing out of the outlet of the charging gun, the temperature of the positive gun wire of the charging gun and the temperature of the negative gun wire of the charging gun; controlling the duty cycle of a water pump driving the circulation of the cooling liquid according to the temperature of the positive gun wire, the temperature of the negative gun wire and the temperature of the cooling liquid flowing out of the outlet of the charging gun; controlling the duty cycle of a cooling fan cooling the cooling liquid according to the duty cycle of the water pump and the temperature of the cooling liquid flowing out of the outlet of the charging gun; and controlling the working current of the charging gun according to the temperature of the positive gun wire, the temperature of the negative gun wire and the temperature of the cooling liquid flowing into the inlet of the charging gun. The application realizes real-time adjustment of heat dissipation and control of the heat generated by the charging gun, thereby ensuring that the charging gun works in an ideal working state, and also ensuring the stability, service life and safety of the charging gun.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, and particularly relates to a temperature control method and device of a charging equipment, an equipment and a storage medium. BACKGROUND

[0002] In recent years, with the continuous development of vehicle technology, the number of electric vehicles is increasing, and the charging time of electric vehicles is getting shorter and shorter. In order to realize the fast charging of electric vehicles, the power of charging piles is also getting larger and larger, which results in that more heat is generated by the charging gun line in the process of charging the electric vehicle through the charging gun line. Therefore, in order to ensure the safety of charging, the temperature of the charging equipment needs to be controlled. In the prior art, the diameter of the charging gun line is increased to reduce the heat generated by the charging gun line by reducing the resistance of the charging gun line.

[0003] However, the inventors have found that the prior art at least has the following technical problems: increasing the diameter of the charging gun line increases the overall weight of the charging gun, which makes it difficult to insert the charging gun line into the electric vehicle during charging, thereby reducing the user experience. SUMMARY

[0004] The present application provides a temperature control method and device of a charging equipment, an equipment and a storage medium, which can improve the safety of charging a vehicle through the charging equipment.

[0005] In a first aspect, the present application provides a temperature control method of a charging equipment, the charging equipment comprising a charging pile and a charging gun, and the method comprising:

[0006] obtaining the temperature of the cooling liquid flowing into the charging gun inlet, the temperature of the cooling liquid flowing out of the charging gun outlet, the temperature of the positive gun line of the charging gun and the temperature of the negative gun line of the charging gun;

[0007] controlling the duty cycle of a water pump driving the circulation of the cooling liquid according to the temperature of the positive gun line, the temperature of the negative gun line and the temperature of the cooling liquid flowing out of the charging gun outlet;

[0008] controlling the duty cycle of a cooling fan cooling the cooling liquid according to the duty cycle of the water pump and the temperature of the cooling liquid flowing out of the charging gun outlet;

[0009] controlling the working current of the charging gun according to the temperature of the positive gun line, the temperature of the negative gun line and the temperature of the cooling liquid flowing into the charging gun inlet.

[0010] In a possible design, the controlling the duty cycle of the water pump driving the circulation of the cooling liquid according to the temperature of the positive gun line, the temperature of the negative gun line and the temperature of the cooling liquid flowing out of the charging gun outlet comprises:

[0011] selecting a maximum gun wire temperature from the positive electrode gun wire temperature and the negative electrode gun wire temperature, the maximum gun wire temperature being a higher temperature of the positive electrode gun wire temperature and the negative electrode gun wire temperature;

[0012] determining an operating state of the charging gun;

[0013] controlling a duty cycle of a water pump driving circulation of the cooling liquid according to the operating state of the charging gun, the maximum gun wire temperature and the temperature of the cooling liquid at the outlet of the charging gun.

[0014] In a possible design, the controlling of the duty cycle of the water pump driving circulation of the cooling liquid according to the operating state of the charging gun, the maximum gun wire temperature and the temperature of the cooling liquid at the outlet of the charging gun includes:

[0015] if the charging gun is in the operating state, controlling the duty cycle of the water pump driving circulation of the cooling liquid according to the temperature of the cooling liquid at the outlet of the charging gun; and if the charging gun is in the non-operating state, controlling the duty cycle of the water pump driving circulation of the cooling liquid according to the maximum gun wire temperature.

[0016] In a possible design, if the temperature of the cooling liquid at the outlet of the charging gun is less than a first preset temperature value, determining whether the current duty cycle of the water pump is a second water pump duty cycle; if yes, continuing to determine whether the temperature of the cooling liquid at the outlet of the charging gun is less than a first control temperature; if the temperature of the cooling liquid at the outlet of the charging gun is less than the first control temperature, controlling the duty cycle of the water pump to be a first water pump duty cycle; and if the temperature of the cooling liquid at the outlet of the charging gun is greater than or equal to the first control temperature, controlling the duty cycle of the water pump to be the second water pump duty cycle.

[0017] In a possible design, the controlling of the duty cycle of the cooling liquid cooling heat dissipation fan according to the duty cycle of the water pump and the temperature of the cooling liquid at the outlet of the charging gun includes:

[0018] if the duty cycle of the water pump is less than a first water pump duty cycle, controlling the duty cycle of the heat dissipation fan to be a first fan duty cycle;

[0019] if the duty cycle of the water pump is greater than or equal to the first water pump duty cycle, controlling the duty cycle of the heat dissipation fan according to the temperature of the cooling liquid at the outlet of the charging gun.

[0020] In a possible design, the controlling of the duty cycle of the heat dissipation fan according to the temperature of the cooling liquid at the outlet of the charging gun includes:

[0021] If the temperature of the charging gun outlet cooling liquid is less than a first preset temperature, a current fan duty cycle of the heat dissipation fan is determined, if the current fan duty cycle is less than or equal to a second fan duty cycle, the duty cycle of the heat dissipation fan is controlled to be a first fan duty cycle, if the current fan duty cycle is greater than the second fan duty cycle and the temperature of the charging gun outlet cooling liquid is less than a first control temperature, the duty cycle of the heat dissipation fan is controlled to be the first fan duty cycle;

[0022] If the temperature of the charging gun outlet cooling liquid is greater than or equal to the first preset temperature and less than a second preset temperature, a current fan duty cycle of the heat dissipation fan is determined, if the current fan duty cycle is less than or equal to a second fan duty cycle, the duty cycle of the heat dissipation fan is controlled to be a second fan duty cycle, if the current fan duty cycle is greater than the second fan duty cycle and the temperature of the charging gun outlet cooling liquid is less than a second control temperature, the duty cycle of the heat dissipation fan is controlled to be the second fan duty cycle, if the current fan duty cycle is greater than the second fan duty cycle and the temperature of the charging gun outlet cooling liquid is greater than or equal to the second control temperature, the duty cycle of the heat dissipation fan is controlled to be a third fan duty cycle;

[0023] If the temperature of the charging gun outlet cooling liquid is greater than or equal to the first preset temperature and greater than or equal to the second preset temperature, the duty cycle of the heat dissipation fan is controlled to be the third fan duty cycle.

[0024] In a possible design, the control of the working current of the charging gun according to the positive electrode gun wire temperature, the negative electrode gun wire temperature and the temperature of the charging gun inlet cooling liquid comprises:

[0025] A maximum gun wire temperature is selected from the positive electrode gun wire temperature and the negative electrode gun wire temperature, if the maximum gun wire temperature is greater than a preset gun wire working temperature or the temperature of the charging gun inlet cooling liquid is greater than a preset inlet working temperature, the charging gun is controlled to stop outputting current;

[0026] If the maximum gun wire temperature is less than or equal to the gun wire working temperature and the temperature of the charging gun inlet cooling liquid is less than or equal to the inlet working temperature, a current output percentage of the charging gun is determined, and the output current of the charging gun is controlled according to the current output percentage.

[0027] In a possible design, the control of the output current of the charging gun according to the current output percentage comprises:

[0028] If the current output percentage is greater than or equal to 100% and the duration is greater than or equal to the preset duration, the charging gun is controlled to output the current corresponding to the maximum power; if the current output percentage is greater than or equal to 100% and the duration is less than the preset duration, the charging gun is controlled to maintain the current output; and if the current output percentage is less than 100%, the charging gun is controlled to maintain the current output.

[0029] In a second aspect, the present application provides a temperature control device of a charging device, the charging device comprising a charging pile and a charging gun, and the device comprising:

[0030] a obtaining module, configured to obtain the temperature of cooling liquid flowing into the charging gun, the temperature of cooling liquid flowing out of the charging gun, the temperature of the positive gun wire of the charging gun, and the temperature of the negative gun wire of the charging gun;

[0031] a first control module, configured to control the duty cycle of a water pump driving the circulation of cooling liquid according to the temperature of the positive gun wire, the temperature of the negative gun wire, and the temperature of the cooling liquid flowing out of the charging gun;

[0032] a second control module, configured to control the duty cycle of a cooling fan cooling the cooling liquid according to the duty cycle of the water pump and the temperature of the cooling liquid flowing out of the charging gun;

[0033] a third control module, configured to control the working current of the charging gun according to the temperature of the positive gun wire, the temperature of the negative gun wire, and the temperature of the cooling liquid flowing into the charging gun.

[0034] In a third aspect, the present application provides an electronic device, comprising at least one processor and a memory;

[0035] the memory stores computer-executable instructions;

[0036] the at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the temperature control method of the charging device as described in the first aspect.

[0037] In a fourth aspect, the present application provides a computer storage medium, wherein the computer storage medium stores computer-executable instructions, and when a processor executes the computer-executable instructions, the temperature control method of the charging device as described in the first aspect is implemented.

[0038] In a fifth aspect, the present application further provides a computer program product, wherein the computer program product comprises a computer program stored in a computer readable storage medium, at least one processor can read the computer program from the computer readable storage medium, and when the at least one processor executes the computer program, the temperature control method of the charging device as described in the first aspect is implemented.

[0039] The temperature control method, device, equipment and storage medium of the charging equipment provided by the application first acquire the temperature of the positive and negative electrode gun wires, the inflow temperature of the cooling liquid flowing into the charging gun, and the outflow temperature of the cooling liquid flowing out of the charging gun, and then control the duty cycle of the water pump, the duty cycle of the heat dissipation fan, and the working current of the charging gun according to the acquired temperatures respectively. Among them, the real-time heat dissipation can be controlled by controlling the duty cycle of the water pump and the duty cycle of the heat dissipation fan, and the heat generated by the charging gun can be controlled by controlling the working current of the charging gun. It can be seen that the temperature control method of the application realizes real-time adjustment of heat dissipation and heat generated by the charging gun, which can ensure that the charging gun works in an ideal working state, and also can ensure the stability and safety of the charging gun, thereby improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

[0041] Figure 1 The flow of the temperature control method of the charging equipment provided by the embodiment of the application Figure 1 ;

[0042] Figure 2 The structure diagram of the temperature control system provided by the embodiment of the application

[0043] Figure 3 The flowchart of the control method of the duty cycle of the water pump provided by the embodiment of the application

[0044] Figure 4 The flowchart of the control method of the duty cycle of the heat dissipation fan provided by the embodiment of the application

[0045] Figure 5 The flowchart of the control method of the charging current provided by the embodiment of the application

[0046] Figure 6 The structure diagram of the temperature control device of the charging equipment provided by the embodiment of the application

[0047] Figure 7 The structure diagram of the electronic equipment provided by the embodiment of the application

[0048] Through the above-mentioned drawings, the specific embodiments of the application have been shown, and there will be more detailed descriptions in the following. These drawings and textual descriptions are not intended to limit the scope of the concept of the application by any means, but to illustrate the concept of the application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0049] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, like reference numerals refer to like elements throughout the description. The following exemplary embodiments described herein represent the best attempts at providing a full, complete, and saturated disclosure of the exemplary embodiments, but are not necessarily all inclusive of all aspects of the application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the application as detailed in the appended claims.

[0050] In recent years, with the continuous development of vehicle technology, the number of electric vehicles is increasing, and the charging time of electric vehicles is getting shorter and shorter. In order to realize the fast charging of electric vehicles, the power of the charging pile is also getting larger and larger, which causes more heat to be generated by the charging gun wire during the charging process of the electric vehicle through the charging gun wire. Therefore, in order to ensure the safety of charging, the temperature of the charging equipment needs to be controlled.

[0051] In the prior art, the heat generated by the charging gun wire is reduced by increasing the diameter of the charging gun wire and reducing the resistance of the charging gun wire. However, increasing the diameter of the charging gun wire increases the overall weight of the charging gun, making it difficult to insert the charging gun wire into the electric vehicle during charging, thereby reducing the user experience. In view of the above technical problems, the cooling liquid can be used to cool the charging gun wire.

[0052] However, the reduction of the wire diameter causes the heat of the charging gun to increase rapidly. In order to manage the efficient operation of the charging gun and prevent the failure caused by overheating of the charging gun, the present application proposes the following technical concept: when the cooling liquid is used to cool the charging gun wire, the temperature of the positive and negative gun wires, the temperature of the cooling liquid flowing into the charging gun inlet, and the temperature of the cooling liquid flowing out of the charging gun outlet are first obtained, and then the duty cycle of the water pump, the duty cycle of the cooling fan, and the working current of the charging gun are controlled according to the obtained temperatures. Among them, the duty cycle of the water pump and the duty cycle of the cooling fan can control the real-time heat dissipation, and the working current of the charging gun can control the heat generated by the charging gun. Therefore, by adjusting the heat dissipation and the heat generated by the charging gun in real time, the stability and safety of the charging gun can be ensured while ensuring that the charging gun works in an ideal working state.

[0053] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail in the following specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0054] The temperature control method of the charging equipment is provided in the embodiments of the present application. The execution subject of the method of the embodiments of the present application can be an electronic device. Figure 1The temperature control method of the charging device provided in the embodiments of the present application Figure 1 The charging device includes a charging pile and a charging gun, as shown in Figure 1 The temperature control method of the charging device includes the following steps:

[0055] S101, the temperature of the cooling liquid flowing into the charging gun inlet, the temperature of the cooling liquid flowing out of the charging gun outlet, the positive electrode gun wire temperature of the charging gun, and the negative electrode gun wire temperature of the charging gun are obtained.

[0056] In the embodiments of the present application, as shown in Figure 2 The temperature control system includes a cooling pipe, a heat exchanger, a cooling fan, a cooling liquid container, a water pump, a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor. The cooling liquid circulates in the cooling pipe and can cool the charging gun when flowing through the charging gun. The cooling liquid exchanges heat with the outside air through the heat exchanger, and the cooling fan can accelerate the heat exchange process. The water pump can drive the cooling liquid to circulate in the cooling pipe.

[0057] Optionally, the temperature of the cooling liquid flowing into the charging gun inlet is monitored by the first temperature sensor, the temperature of the cooling liquid flowing out of the charging gun outlet is monitored by the second temperature sensor, the positive electrode gun wire temperature of the charging gun is monitored by the third temperature sensor, and the negative electrode gun wire temperature of the charging gun is monitored by the fourth temperature sensor. Accordingly, this step is: the first temperature sensor, the second temperature sensor, the third temperature sensor, and the fourth temperature sensor upload the detected temperatures to the temperature control device to obtain the temperature of the cooling liquid flowing into the charging gun inlet, the temperature of the cooling liquid flowing out of the charging gun outlet, the positive electrode gun wire temperature of the charging gun, and the negative electrode gun wire temperature of the charging gun.

[0058] S102, according to the positive electrode gun wire temperature, the negative electrode gun wire temperature, and the temperature of the cooling liquid flowing out of the charging gun outlet, the duty cycle of the water pump driving the cooling liquid to circulate is controlled.

[0059] In the embodiments of the present application, the higher the duty cycle of the water pump, the greater the rotational speed of the water pump, and the driving force also increases, the circulation rate of the cooling liquid increases, and the heat dissipation rate also increases; on the contrary, the lower the duty cycle of the water pump, the smaller the rotational speed of the water pump, and the driving force also decreases, the circulation rate of the cooling liquid decreases, and the heat dissipation rate also decreases.

[0060] Optionally, the duty cycle of the water pump is flexibly controlled according to the positive electrode gun wire temperature, the negative electrode gun wire temperature, and the temperature of the cooling liquid flowing out of the charging gun outlet, so as to control the heat dissipation rate of the cooling liquid.

[0061] S103, according to the duty cycle of the water pump and the temperature of the cooling liquid flowing out of the charging gun outlet, the duty cycle of the cooling fan for cooling the cooling liquid is controlled.

[0062] In the embodiment of the present application, the heat dissipation fan is attached to the heat exchanger. The higher the duty cycle of the heat dissipation fan, the greater the rotating speed of the heat dissipation fan, and the greater the heat dissipation rate of the heat exchanger; on the contrary, the lower the duty cycle of the heat dissipation fan, the smaller the rotating speed of the heat dissipation fan, and the lower the heat dissipation rate of the heat exchanger.

[0063] Optionally, by the duty cycle of the water pump and the temperature of the cooling liquid at the outlet of the charging gun, the duty cycle of the heat dissipation fan can be flexibly controlled to control the heat dissipation rate of the heat exchanger.

[0064] S104, according to the positive gun wire temperature, the negative gun wire temperature and the temperature of the cooling liquid at the inlet of the charging gun, control the working current of the charging gun.

[0065] In the embodiment of the present application, the greater the working current of the charging gun, the greater the output power, and the greater the heat generated by the charging gun wire; on the contrary, the smaller the working current of the charging gun, the smaller the output power, and the smaller the heat generated by the charging gun wire.

[0066] Optionally, by the positive gun wire temperature, the negative gun wire temperature and the temperature of the cooling liquid at the inlet of the charging gun, the working current of the charging gun can be flexibly controlled to control the heat generated by the charging gun wire.

[0067] The present application provides a temperature control method of a charging device, first obtaining the temperature of the positive and negative gun wires, the temperature of the cooling liquid flowing into the inlet of the charging gun, and the temperature of the cooling liquid flowing out of the outlet of the charging gun, and then controlling the duty cycle of the water pump, the duty cycle of the heat dissipation fan, and the working current of the charging gun according to the obtained temperatures respectively. Among them, by controlling the duty cycle of the water pump and the duty cycle of the heat dissipation fan, the real-time heat dissipation can be controlled, and by controlling the working current of the charging gun, the heat generated by the charging gun can be controlled. As can be seen, the temperature control method of the present application realizes real-time adjustment of heat dissipation and heat generated by the charging gun, which not only ensures that the charging gun works in an ideal working state, but also ensures the stability and safety of the charging gun, thereby improving the user experience.

[0068] In the embodiment of the present application, in Figure 1 Based on the provided embodiment, the specific implementation method of controlling the duty cycle of the water pump driving the circulation of the cooling liquid according to the positive gun wire temperature, the negative gun wire temperature and the temperature of the cooling liquid at the outlet of the charging gun in S102 is described in detail. The method comprises:

[0069] S201, selecting the maximum gun wire temperature with higher temperature from the positive gun wire temperature and the negative gun wire temperature.

[0070] Optionally, as shown in Figure 3 The positive gun wire temperature T1, the negative gun wire temperature T2, and the maximum gun wire temperature with higher temperature are TG = max (T1, T2).

[0071] S202, determine the working state of the charging gun.

[0072] Optionally, the working state of the charging gun includes a working state and a non-working state.

[0073] S203, according to the working state of the charging gun, the maximum gun line temperature and the temperature of the charging gun outlet cooling liquid, control the duty cycle of the water pump driving the cooling liquid circulation.

[0074] Optionally, as shown in Figure 3 , if the charging gun is in the working state, according to the temperature of the charging gun outlet cooling liquid, control the duty cycle of the water pump driving the cooling liquid circulation; if the charging gun is in the non-working state, according to the maximum gun line temperature, control the duty cycle of the water pump driving the cooling liquid circulation.

[0075] Continuing to refer to Figure 3 , according to the temperature of the charging gun outlet cooling liquid, control the duty cycle of the water pump driving the cooling liquid circulation includes: if the temperature TW of the charging gun outlet cooling liquid is greater than the first preset temperature value T0, control the duty cycle of the water pump to be the second water pump duty cycle, which can be represented by PN2.

[0076] If the temperature TW of the charging gun outlet cooling liquid is less than the first preset temperature value T0, determine whether the current duty cycle of the water pump is the second water pump duty cycle. If the current duty cycle of the water pump is not the second water pump duty cycle, control the duty cycle of the water pump to be the first water pump duty cycle. If it is, continue to determine whether the temperature TW of the charging gun outlet cooling liquid is less than the first control temperature T0-TK. If the temperature TW of the charging gun outlet cooling liquid is less than the first control temperature T0-TK, control the duty cycle of the water pump to be the first water pump duty cycle, which can be represented by PN1. If the temperature TW of the charging gun outlet cooling liquid is greater than or equal to the first control temperature T0-TK, control the duty cycle of the water pump to be the second water pump duty cycle. Wherein T0 represents the first preset temperature value. TK represents the first hysteresis temperature, which refers to the hysteresis temperature of the outlet cooling liquid.

[0077] Here, when the temperature TW of the charging gun outlet cooling liquid is less than the first preset temperature T0, if the current duty cycle of the water pump is the second water pump duty cycle, further determine whether the temperature TW of the charging gun outlet cooling liquid is less than the first control temperature T0-TK, and only when it is less than the first control temperature, the switching is performed, avoiding frequent switching of the duty cycle of the water pump.

[0078] Continuing to refer to Figure 3According to the maximum gun wire temperature, the step of controlling the duty cycle of the water pump driving the cooling liquid circulation comprises: determining whether the maximum gun wire temperature TG is greater than a second preset temperature value T1, if the maximum gun wire temperature TG is greater than the second preset temperature value T1, the duty cycle of the water pump is controlled to be a fourth water pump duty cycle, which can be represented by PN4.

[0079] If the maximum gun wire temperature TG is less than the second preset temperature value T1, it is determined whether the duty cycle of the water pump is the fourth water pump duty cycle. If not, the duty cycle of the water pump is controlled to be a third water pump duty cycle, which can be represented by PN3; if yes, it is continued to determine whether the maximum gun wire temperature TG is less than a third control temperature T1-TM. Wherein T1 represents the second preset temperature value, TM represents the second hysteresis temperature, that is, the hysteresis temperature of the charging gun wire. If the maximum gun wire temperature TG is less than the third control temperature T1-TM, the duty cycle of the water pump is controlled to be the fourth water pump duty cycle. If the maximum gun wire temperature TG is greater than or equal to the third control temperature T1-TM, the duty cycle of the water pump is controlled to be the third water pump duty cycle.

[0080] It should be noted that the first hysteresis temperature and the second hysteresis temperature are set here to prevent frequent switching of the water pump duty cycle and improve the stability of the temperature control system.

[0081] In the embodiments of the present application, the specific values of the first preset temperature value, the first hysteresis temperature, the second hysteresis temperature, the first water pump duty cycle, the second water pump duty cycle, the third water pump duty cycle and the fourth water pump duty cycle are not specifically limited. For example, the temperature range of the first preset temperature T0 is -20℃~0℃. The temperature range of the second preset temperature T1 is 50℃~90℃. The duty cycle range of PN1 is 0%~20%, the duty cycle range of PN2 is 90%~100%, the duty cycle range of PN3 is 0%~20%, and the duty cycle range of PN4 is 30%~70%.

[0082] In the embodiments of the present application, Figure 1 On the basis of the provided embodiments, the specific implementation method of controlling the duty cycle of the cooling liquid cooling fan according to the duty cycle of the water pump and the temperature of the charging gun outlet cooling liquid in S103 is described in detail. The method comprises:

[0083] S301, if the duty cycle of the water pump is less than the first water pump duty cycle, the duty cycle of the cooling fan is controlled to be a first fan duty cycle.

[0084] For example, as shown in the figure, the first water pump duty cycle can be represented by PN1. Figure 4

[0085] S302, if the duty cycle of the water pump is greater than or equal to the first water pump duty cycle, the duty cycle of the cooling fan is controlled according to the temperature of the charging gun outlet cooling liquid.​

[0086] Optionally, referring to Figure 4 , according to the temperature of the charging gun outlet cooling liquid, the specific steps of controlling the duty cycle of the heat dissipation fan are: if the temperature of the charging gun outlet cooling liquid is less than the first preset temperature, the current fan duty cycle of the heat dissipation fan is determined, if the current fan duty cycle is less than or equal to the second fan duty cycle FN2, the duty cycle of the heat dissipation fan is controlled to be the first fan duty cycle FN1, if the current fan duty cycle is greater than the second fan duty cycle FN2 and the temperature of the charging gun outlet cooling liquid is less than the first control temperature T0-TK, the duty cycle of the heat dissipation fan is controlled to be the first fan duty cycle FN1.

[0087] Continuing to refer to Figure 4 , if the temperature of the charging gun outlet cooling liquid is greater than or equal to the first preset temperature T0 and less than the second preset temperature T1, the current fan duty cycle of the heat dissipation fan is determined, if the current fan duty cycle is less than or equal to the second fan duty cycle FN2, the duty cycle of the heat dissipation fan is controlled to be the second fan duty cycle FN2, if the current fan duty cycle is greater than the second fan duty cycle FN2 and the temperature of the charging gun outlet cooling liquid is less than the second control temperature T1-TK, the duty cycle of the heat dissipation fan is controlled to be the second fan duty cycle FN2, if the current fan duty cycle is greater than the second fan duty cycle FN2 and the temperature of the charging gun outlet cooling liquid is greater than or equal to the second control temperature T1-TK, the duty cycle of the heat dissipation fan is controlled to be the third fan duty cycle FN3.

[0088] It should be noted that the first control temperature and the second control temperature are set here to prevent the duty cycle of the heat dissipation fan from frequently switching and improve the stability of the temperature control system.

[0089] Continuing to refer to Figure 4 , if the temperature of the charging gun outlet cooling liquid is greater than or equal to the first preset temperature T0 and greater than or equal to the second preset temperature T1, the duty cycle of the heat dissipation fan is controlled to be the third fan duty cycle FN3.

[0090] In the embodiments of the present application, the specific values of the first preset temperature, the second preset temperature, the first fan duty cycle, the second fan duty cycle and the third fan duty cycle are not specifically limited. For example, the temperature range of the first preset temperature T0 is 10℃-20℃. The temperature range of the second preset temperature T1 is 30℃-70℃. The temperature range of TK is 1℃-10℃. The duty cycle range of FN1 is 0%-10%, the duty cycle range of FN2 is 40%-80%, and the duty cycle range of FN3 is 90%-100%.

[0091] In the embodiments of the present application, in Figure 1Based on the embodiments provided, the specific implementation method of controlling the working current of the charging gun according to the positive electrode gun wire temperature, the negative electrode gun wire temperature and the temperature of the charging gun inlet cooling liquid in S104 is described in detail. The method comprises:

[0092] S401, selecting the maximum gun wire temperature with higher temperature from the positive electrode gun wire temperature and the negative electrode gun wire temperature, and if the maximum gun wire temperature is greater than the preset gun wire working temperature or the temperature of the charging gun inlet cooling liquid is greater than the preset inlet working temperature, controlling the charging gun to stop outputting current.

[0093] For example, as shown in Figure 5 , the maximum gun wire temperature can be represented by TG. The preset gun wire working temperature can be represented by TG0. The temperature of the charging gun inlet cooling liquid can be represented by Ti. The preset inlet working temperature can be represented by Ti0.

[0094] S402, if the maximum gun wire temperature is less than or equal to the gun wire working temperature and the temperature of the charging gun inlet cooling liquid is less than or equal to the inlet working temperature, determining the current output percentage of the charging gun at present; according to the current output percentage, controlling the output current of the charging gun.

[0095] Optionally, referring to Figure 5 , the current output percentage is the minimum value of the current output percentage PG corresponding to the maximum gun wire temperature TG and the current output percentage Pi corresponding to the temperature Ti of the charging gun inlet cooling liquid. That is, the current output percentage P = min (PG, Pi).

[0096] Wherein, the current output percentage PG corresponding to the maximum gun wire temperature TG can be determined by formula one below, and the current output percentage Pi corresponding to the temperature Ti of the charging gun inlet cooling liquid can be determined by formula two below.

[0097] Formula one:

[0098] Wherein, represents the critical gun wire temperature corresponding to the current output percentage of 100%; represents the back difference temperature value of the gun wire temperature (to reduce the fluctuation of output capacity), is the output coefficient. For example, may be any value between 30% and 50%, may be any value between 2℃ and 10℃.

[0099] Formula two:

[0100] Wherein, represents the critical inlet coolant temperature corresponding to the current output percentage of 100%; represents the back-lash temperature value of the inlet coolant (to reduce the fluctuation of output capacity), is the output coefficient. Exemplarily, may be any value between 30% and 50%, may be any value between 2℃ and 10℃.

[0101] Optionally, continuing to refer to Figure 5 , according to the current current output percentage, the output current of the charging gun is controlled, including: if the current output percentage is greater than or equal to 100% and the duration is greater than or equal to the preset duration, the output current corresponding to the maximum power of the charging gun is controlled; if the current output percentage is greater than or equal to 100% and the duration is less than the preset duration, the current output percentage of the charging gun is controlled to remain the current output current; if the current output percentage is less than 100%, the current output percentage of the charging gun is controlled to remain the current output current. In the embodiment of the application, the specific value of the preset duration is not specifically limited. Exemplarily, the preset duration is 1 minute. It should be noted that by setting the preset duration, the fluctuation of the output current size can be prevented, and the stability of the output current is improved.

[0102] Exemplarily, the current output current is also controlled to remain the current output current, that is, the current output percentage P is limited according to the actual output current I. Continuing to refer to Figure 5 , when the charging gun is controlled to remain the current output current, it can also be determined whether the current output current I is greater than the preset minimum current Imin. If the current output current I is greater than or equal to Imin, the current output current I is output. If the current output current I is less than Imin, the preset minimum current Imin is output.

[0103] In the embodiment of the application, the specific value of the preset minimum current is not specifically limited. Exemplarily, the preset minimum current Imin is any value between 100A and 200A.

[0104] Figure 6 is a structural schematic diagram of the temperature control device of the charging equipment provided by the embodiment of the application. As Figure 6 shown, the temperature control device of the charging equipment includes an acquisition module 601, a first control module 602, a second control module 603, and a third control module 604.

[0105] The acquisition module 601 is configured to acquire the temperature of the inlet coolant flowing into the charging gun, the temperature of the outlet coolant flowing out of the charging gun, the positive electrode gun wire temperature of the charging gun, and the negative electrode gun wire temperature of the charging gun.

[0106] The first control module 602 is configured to control a duty cycle of a water pump for driving circulation of the cooling liquid according to the positive electrode gun wire temperature, the negative electrode gun wire temperature and the temperature of the charging gun outlet cooling liquid.

[0107] The second control module 603 is configured to control a duty cycle of a cooling liquid cooling fan according to the duty cycle of the water pump and the temperature of the charging gun outlet cooling liquid.

[0108] The third control module 604 is configured to control a working current of the charging gun according to the positive electrode gun wire temperature, the negative electrode gun wire temperature and the temperature of the charging gun inlet cooling liquid.

[0109] In a possible design, the first control module 602 controls the duty cycle of the water pump for driving circulation of the cooling liquid according to the positive electrode gun wire temperature, the negative electrode gun wire temperature and the temperature of the charging gun outlet cooling liquid, and specifically includes: selecting a maximum gun wire temperature with a higher temperature from the positive electrode gun wire temperature and the negative electrode gun wire temperature; determining a working state of the charging gun; and controlling the duty cycle of the water pump for driving circulation of the cooling liquid according to the working state of the charging gun, the maximum gun wire temperature and the temperature of the charging gun outlet cooling liquid.

[0110] In a possible design, the first control module 602 controls the duty cycle of the water pump for driving circulation of the cooling liquid according to the working state of the charging gun, the maximum gun wire temperature and the temperature of the charging gun outlet cooling liquid, and specifically includes: if the charging gun is in the working state, controlling the duty cycle of the water pump for driving circulation of the cooling liquid according to the temperature of the charging gun outlet cooling liquid; and if the charging gun is in a non-working state, controlling the duty cycle of the water pump for driving circulation of the cooling liquid according to the maximum gun wire temperature.

[0111] In a possible design, the second control module 603 controls the duty cycle of the cooling liquid cooling fan according to the duty cycle of the water pump and the temperature of the charging gun outlet cooling liquid, and specifically includes: if the duty cycle of the water pump is less than a first water pump duty cycle, controlling the duty cycle of the cooling liquid cooling fan to be a first fan duty cycle; and if the duty cycle of the water pump is greater than or equal to the first water pump duty cycle, controlling the duty cycle of the cooling liquid cooling fan according to the temperature of the charging gun outlet cooling liquid.

[0112] In a possible design, the second control module 603 controls the duty cycle of the cooling liquid cooling fan according to the temperature of the charging gun outlet cooling liquid, and specifically includes: if the temperature of the charging gun outlet cooling liquid is less than a first preset temperature, determining a current fan duty cycle of the cooling liquid cooling fan; if the current fan duty cycle is less than or equal to a second fan duty cycle, controlling the duty cycle of the cooling liquid cooling fan to be the first fan duty cycle; if the current fan duty cycle is greater than the second fan duty cycle and the temperature of the charging gun outlet cooling liquid is less than a first regulation temperature, controlling the duty cycle of the cooling liquid cooling fan to be the first fan duty cycle.

[0113] If the temperature of the charging gun outlet cooling liquid is greater than or equal to the first preset temperature and less than the second preset temperature, a current fan duty cycle of the heat dissipation fan is determined, if the current fan duty cycle is less than or equal to the second fan duty cycle, the duty cycle of the heat dissipation fan is controlled to be the second fan duty cycle, if the current fan duty cycle is greater than the second fan duty cycle and the temperature of the charging gun outlet cooling liquid is less than the second regulated temperature, the duty cycle of the heat dissipation fan is controlled to be the second fan duty cycle, if the current fan duty cycle is greater than the second fan duty cycle and the temperature of the charging gun outlet cooling liquid is greater than or equal to the second regulated temperature, the duty cycle of the heat dissipation fan is controlled to be the third fan duty cycle;

[0114] If the temperature of the charging gun outlet cooling liquid is greater than or equal to the first preset temperature and greater than or equal to the second preset temperature, the duty cycle of the heat dissipation fan is controlled to be the third fan duty cycle.

[0115] In a possible design, the third control module 604 controls the working current of the charging gun according to the positive electrode gun wire temperature, the negative electrode gun wire temperature and the temperature of the charging gun inlet cooling liquid, including: selecting a maximum gun wire temperature with a higher temperature from the positive electrode gun wire temperature and the negative electrode gun wire temperature, if the maximum gun wire temperature is greater than a preset gun wire working temperature or the temperature of the charging gun inlet cooling liquid is greater than a preset inlet working temperature, the charging gun is controlled to stop outputting current, if the maximum gun wire temperature is less than or equal to the gun wire working temperature and the temperature of the charging gun inlet cooling liquid is less than or equal to the inlet working temperature, a current output percentage of the charging gun is determined, and the output current of the charging gun is controlled according to the current output percentage.

[0116] In a possible design, the third control module 604 controls the output current of the charging gun according to the current output percentage, including: if the current output percentage is greater than or equal to 100% and the duration is greater than or equal to a preset duration within a preset duration, the charging gun is controlled to output a maximum power corresponding output current, if the current output percentage is greater than or equal to 100% and the duration is less than the preset duration, the charging gun is controlled to maintain the current output current, and if the current output percentage is less than 100%, the charging gun is controlled to maintain the current output current.

[0117] The temperature control device of the charging equipment provided in the embodiments of the present application can be used to execute the technical solutions of the temperature control method of the charging equipment in the above embodiments, and has similar implementation principles and technical effects, which will not be described herein.

[0118] It should be noted that the division of each module of the above apparatus is only a logical function division, and all or part of them can be integrated into a physical entity or physically separated when actually implemented. And these modules can all be implemented in the form of software called by a processing element; all can be implemented in the form of hardware; some modules can be implemented in the form of software called by a processing element, and some modules can be implemented in the form of hardware. For example, the acquisition module 501 can be a separately set processing element, or can be integrated in a chip of the above apparatus, in addition, it can also be stored in the form of program code in the memory of the above apparatus, and the function of the above acquisition module 501 is called and executed by a processing element of the above apparatus. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together or independently implemented. The processing element here can be an integrated circuit with signal processing capability. In the implementation process, each step of the above method or each module can be completed by integrated logic circuit of hardware in the processing element or instruction in the form of software.

[0119] Figure 7 The structure schematic diagram of the electronic device provided by the embodiment of the application is shown in the figure. Figure 7 As shown in the figure, the electronic device can include a transceiver 701, a processor 702, and a memory 703.

[0120] The processor 702 executes the computer execution instructions stored in the memory, so that the processor 702 executes the scheme in the above embodiment. The processor 702 can be a general-purpose processor, including a central processing unit CPU, a network processor NP, etc.; it can also be a digital signal processor DSP, an application-specific integrated circuit ASIC, a field programmable gate array FPGA or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0121] The memory 703 is connected with the processor 702 through a system bus and completes mutual communication, and the memory 703 is used for storing computer program instructions.

[0122] The transceiver 701 can be used to acquire a to-be-run task and configuration information of the to-be-run task.

[0123] The system bus can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The system bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or only one type of bus. The transceiver is used to realize the communication between the database access device and other computers (such as clients, read-write libraries and read-only libraries). The memory can include random access memory (RAM) and can also include non-volatile memory.

[0124] The electronic device provided by the embodiment of the application can be the computer device of the above-mentioned embodiment.

[0125] The embodiment of the application further provides a chip for running instructions, which is used to execute the technical solution of the temperature control method of the charging device in the above-mentioned embodiment.

[0126] The embodiment of the application further provides a computer readable storage medium, which stores computer instructions, and when the computer instructions are run on a computer, the computer executes the technical solution of the temperature control method of the charging device in the above-mentioned embodiment.

[0127] The embodiment of the application further provides a computer program product, which includes a computer program stored in a computer readable storage medium, at least one processor can read the computer program from the computer readable storage medium, and when the at least one processor executes the computer program, the technical solution of the temperature control method of the charging device in the above-mentioned embodiment can be realized.

[0128] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The specification and examples given are exemplary only and the true scope and spirit of the application is indicated by the following claims. The true scope and spirit of the application are indicated by the following claims.

[0129] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A temperature control method of a charging device, characterized by, The charging device includes a charging pile and a charging gun, and the method includes: obtaining the temperature of the cooling liquid flowing into the charging gun inlet, the temperature of the cooling liquid flowing out of the charging gun outlet, the positive gun wire temperature of the charging gun, and the negative gun wire temperature of the charging gun; controlling the duty cycle of the water pump driving the circulation of the cooling liquid according to the positive gun wire temperature, the negative gun wire temperature, and the temperature of the cooling liquid at the charging gun outlet, wherein if the temperature of the cooling liquid at the charging gun outlet is less than a first preset temperature, it is determined whether the current duty cycle of the water pump is a second water pump duty cycle; if yes, it is determined whether the temperature of the cooling liquid at the charging gun outlet is less than a first control temperature; if the temperature of the cooling liquid at the charging gun outlet is less than the first control temperature, the duty cycle of the water pump is controlled to be a first water pump duty cycle, and if the temperature of the cooling liquid at the charging gun outlet is greater than or equal to the first control temperature, the duty cycle of the water pump is controlled to be the second water pump duty cycle, wherein the second water pump duty cycle is greater than the first water pump duty cycle; controlling the duty cycle of the cooling fan cooling the cooling liquid according to the duty cycle of the water pump and the temperature of the cooling liquid at the charging gun outlet, wherein if the duty cycle of the water pump is less than a first water pump duty cycle, the duty cycle of the cooling fan is controlled to be a first fan duty cycle; and if the duty cycle of the water pump is greater than or equal to the first water pump duty cycle, the duty cycle of the cooling fan is controlled according to the temperature of the cooling liquid at the charging gun outlet; controlling the working current of the charging gun according to the positive gun wire temperature, the negative gun wire temperature, and the temperature of the cooling liquid at the charging gun inlet.

2. The method of claim 1, wherein, The control of the duty cycle of the water pump driving the circulation of the cooling liquid according to the positive gun wire temperature, the negative gun wire temperature, and the temperature of the cooling liquid at the charging gun outlet includes: selecting the maximum gun wire temperature with a higher temperature from the positive gun wire temperature and the negative gun wire temperature; determining the working state of the charging gun; controlling the duty cycle of the water pump driving the circulation of the cooling liquid according to the working state of the charging gun, the maximum gun wire temperature, and the temperature of the cooling liquid at the charging gun outlet.

3. The method of claim 2, wherein, The control of the duty cycle of the water pump driving the circulation of the cooling liquid according to the working state of the charging gun, the maximum gun wire temperature, and the temperature of the cooling liquid at the charging gun outlet includes: if the charging gun is in a working state, controlling the duty cycle of the water pump driving the circulation of the cooling liquid according to the temperature of the cooling liquid at the charging gun outlet; and if the charging gun is in a non-working state, controlling the duty cycle of the water pump driving the circulation of the cooling liquid according to the maximum gun wire temperature.

4. The method of claim 1, wherein, The control of the duty cycle of the cooling fan according to the temperature of the cooling liquid at the charging gun outlet includes: If the temperature of the outlet cooling liquid of the charging gun is less than a first preset temperature, a current fan duty cycle of the heat dissipation fan is determined, if the current fan duty cycle is less than or equal to a second fan duty cycle, the duty cycle of the heat dissipation fan is controlled to be a first fan duty cycle, if the current fan duty cycle is greater than the second fan duty cycle and the temperature of the outlet cooling liquid of the charging gun is less than a first control temperature, the duty cycle of the heat dissipation fan is controlled to be the first fan duty cycle; If the temperature of the outlet cooling liquid of the charging gun is greater than or equal to the first preset temperature and less than a second preset temperature, a current fan duty cycle of the heat dissipation fan is determined, if the current fan duty cycle is less than or equal to a second fan duty cycle, the duty cycle of the heat dissipation fan is controlled to be a second fan duty cycle, if the current fan duty cycle is greater than the second fan duty cycle and the temperature of the outlet cooling liquid of the charging gun is less than a second control temperature, the duty cycle of the heat dissipation fan is controlled to be the second fan duty cycle, if the current fan duty cycle is greater than the second fan duty cycle and the temperature of the outlet cooling liquid of the charging gun is greater than or equal to the second control temperature, the duty cycle of the heat dissipation fan is controlled to be a third fan duty cycle, wherein the first fan duty cycle is less than the second fan duty cycle, the second fan duty cycle is less than the third fan duty cycle, the first control temperature is a difference between the first preset temperature and a hysteresis temperature of the outlet cooling liquid, and the second control temperature is a difference between the second preset temperature and the hysteresis temperature of the outlet cooling liquid; If the temperature of the outlet cooling liquid of the charging gun is greater than or equal to the first preset temperature and greater than or equal to the second preset temperature, the duty cycle of the heat dissipation fan is controlled to be the third fan duty cycle, wherein the second preset temperature is greater than the first preset temperature.

5. The method of claim 1, wherein, The control of the working current of the charging gun according to the positive electrode gun wire temperature, the negative electrode gun wire temperature and the temperature of the inlet cooling liquid of the charging gun comprises: A maximum gun wire temperature is selected from the positive electrode gun wire temperature and the negative electrode gun wire temperature, if the maximum gun wire temperature is greater than a preset gun wire working temperature or the temperature of the inlet cooling liquid of the charging gun is greater than a preset inlet working temperature, the charging gun is controlled to stop outputting current; If the maximum gun wire temperature is less than or equal to the gun wire working temperature and the temperature of the inlet cooling liquid of the charging gun is less than or equal to the inlet working temperature, a current output percentage of the charging gun is determined, and the output current of the charging gun is controlled according to the current output percentage.

6. The method of claim 5, wherein, The control of the output current of the charging gun according to the current output percentage comprises: If the current current output percentage is greater than or equal to 100% and the duration is greater than or equal to the preset duration, the charging gun is controlled to output the current corresponding to the maximum power; if the current current output percentage is greater than or equal to 100% and the duration is less than the preset duration, the charging gun is controlled to maintain the current output; and if the current current output percentage is less than 100%, the charging gun is controlled to maintain the current output.

7. A temperature control device for a charging apparatus, characterized by comprising: The charging device includes a charging pile and a charging gun, and the device includes: An acquisition module is configured to acquire the temperature of cooling liquid flowing into the charging gun inlet, the temperature of cooling liquid flowing out of the charging gun outlet, the temperature of the positive gun wire of the charging gun, and the temperature of the negative gun wire of the charging gun; A first control module is configured to control the duty cycle of a water pump driving the circulation of cooling liquid according to the temperature of the positive gun wire, the temperature of the negative gun wire, and the temperature of the cooling liquid of the charging gun outlet, wherein if the temperature of the cooling liquid of the charging gun outlet is less than a first preset temperature, it is determined whether the current duty cycle of the water pump is a second water pump duty cycle; if yes, it is determined whether the temperature of the cooling liquid of the charging gun outlet is less than a first control temperature; if the temperature of the cooling liquid of the charging gun outlet is less than the first control temperature, the duty cycle of the water pump is controlled to be a first water pump duty cycle; if the temperature of the cooling liquid of the charging gun outlet is greater than or equal to the first control temperature, the duty cycle of the water pump is controlled to be the second water pump duty cycle, wherein the second water pump duty cycle is greater than the first water pump duty cycle; A second control module is configured to control the duty cycle of a cooling fan cooling the cooling liquid according to the duty cycle of the water pump and the temperature of the cooling liquid of the charging gun outlet, wherein if the duty cycle of the water pump is less than a first water pump duty cycle, the duty cycle of the cooling fan is controlled to be a first fan duty cycle; if the duty cycle of the water pump is greater than or equal to the first water pump duty cycle, the duty cycle of the cooling fan is controlled according to the temperature of the cooling liquid of the charging gun outlet; A third control module is configured to control the working current of the charging gun according to the temperature of the positive gun wire, the temperature of the negative gun wire, and the temperature of the cooling liquid of the charging gun inlet.

8. An electronic device, comprising: It includes: A processor and a memory connected to the processor in communication; The memory stores computer execution instructions; The processor executes the computer execution instructions stored in the memory to implement the method of any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by the processor to implement the method of any one of claims 1-6.

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