Charging pile control method, control device and charging pile system

Abstract

The invention discloses a charging pile control method and device and a charging pile system, and relates to the technical field of charging pile control, the charging pile comprises a charging gun, in the charging pile control method, firstly, the temperature of the charging gun is obtained, and the temperature rise slope of the charging gun is calculated; and when the temperature rise slope is greater than a preset slope, controlling the charging gun to be in a non-working state. According to the charging pile control method provided by the invention, through mutual cooperation of three mechanisms of software over-temperature protection, hardware over-temperature protection and temperature rise slope protection, a set of over-temperature protection scheme with complete functions and multiple redundancy is formed, so that the safety and reliability of charging equipment are improved.

Description

Technical Field

[0001] The present application relates to the field of charging pile control technology, and in particular to a charging pile control method, a control device and a charging pile system. Background Art

[0002] With the development of new energy vehicles, people have higher and higher requirements for charging piles. Charging piles can convert the energy of the power grid into power and transmit it to the power battery pack of the electric vehicle through the charging gun to charge the power battery pack. However, during the charging process of electric vehicles, if the charging current is too large, a large amount of heat will be generated at the charging interface, cables, and cable connections. Excessive temperature will damage the charging gun, including the insulation material, and even cause a fire. Summary of the invention

[0003] The main purpose of the present invention is to provide a charging pile control method, a control device and a charging pile system, aiming to provide a charging pile control method to protect the charging gun in the charging pile and improve the reliability and safety of the charging pile system.

[0004] To achieve the above object, the present invention proposes a charging pile control method, wherein the charging pile includes a charging gun, and the charging pile control method includes: Obtaining the temperature of the charging gun and calculating the temperature rise slope of the charging gun; When the temperature rise slope is greater than the preset slope, the charging gun is controlled to be in a non-working state Optionally, after obtaining the temperature of the charging gun, the charging pile control method further includes: When the temperature of the charging gun is greater than a first preset temperature and reaches a first preset time, the output current of the charging gun is reduced to a preset current value or the charging gun is controlled to be in a non-working state; when the temperature of the charging gun is greater than a second preset temperature, the charging gun is controlled to be in a non-working state.

[0005] Optionally, when the temperature of the charging gun is greater than a second preset temperature, controlling the charging gun to be in a non-working state includes: When the temperature of the charging gun is greater than a second preset temperature, an over-temperature fault signal is generated, and the charging gun is controlled to be in a non-working state according to the over-temperature fault signal.

[0006] Optionally, when the temperature of the charging gun is greater than a first preset temperature, the step of reducing the output current of the charging gun to a preset current value or controlling the charging gun to be in a non-working state specifically includes: When the temperature of the charging gun is greater than a first preset temperature, starting timing to obtain a first duration; When the temperature of the charging gun is lower than the first preset temperature, the timing is stopped and the first time length is reset to zero; When the temperature of the charging gun is greater than a second preset temperature, the charging gun is controlled to be in a non-working state, the timing is stopped, and the first duration is reset to zero; When the first time period reaches a first preset time period, the output current of the charging gun is reduced to a preset current value or the charging gun is controlled to be in a non-working state.

[0007] Optionally, the temperature rise slope of the charging gun is calculated using the following formula: ; In the formula, is the temperature rise slope of the charging gun; is the temperature detected at the first time point; is the temperature detected at the second time point; is the time interval between the first time point and the second time point.

[0008] The present invention also provides a control device, which includes: Memory; Processor; and A charging pile control program is stored in a memory and can be run on a processor, and when the processor executes the charging pile control program, the charging pile control method as described in any one of the above items is implemented.

[0009] The present invention also proposes a charging pile system, comprising the control device as described above.

[0010] In the charging pile control method of the present invention, the temperature of the charging gun is first obtained, and the temperature rise slope of the charging gun is calculated; when the temperature rise slope is greater than the preset slope, the charging gun is controlled to be in a non-working state. In practical applications, when the charging pile fails, the temperature rise slope of the charging gun will be higher than the temperature rise slope of the charging gun when the charging pile works normally, that is, the preset slope. Therefore, when the temperature rise slope is greater than the preset slope, it is determined that the charging pile fails, and the charging gun is controlled to be in a non-working state, that is, the shutdown is triggered. The protection includes software-triggered protection and hardware-triggered protection to increase the redundancy of the protection. In this way, it can ensure that the temperature of the charging gun will not rise to the maximum temperature that the charging gun can withstand when the charging pile works abnormally, and the charging gun, cable, and rechargeable battery are effectively protected, avoiding damage to the charging pile caused by high temperature when the charging pile works abnormally, and improving the safety of the charging pile system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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 or the description of the prior art 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 the structures shown in these drawings without paying creative work.

[0012] Figure 1 This is a flow chart of an embodiment of a charging pile control method of the present invention; Figure 2 This is a flow chart of another embodiment of the charging pile control method of the present invention; Figure 3 This is a flow chart of another embodiment of the charging pile control method of the present invention; Figure 4 This is a temperature variation diagram of a charging gun according to an embodiment of a charging pile control method of the present invention; Figure 5 The flowchart of another embodiment of the charging pile control method of the present invention.

[0013] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0016] It should be noted that, in this article, step codes such as S100, S200, etc. are used for the purpose of expressing the corresponding content more clearly and concisely, and do not constitute a substantial limitation on the sequence. When implementing the step, those skilled in the art may execute S200 first and then S100, etc., but these should all be within the scope of protection of this application.

[0017] With the development of new energy vehicles, people have higher and higher requirements for charging piles. Charging piles can transfer the voltage of the rechargeable battery to the battery of the electric vehicle through the charging gun to charge the battery. However, during the charging process of the electric vehicle, if the charging current is too large, a large amount of heat will be generated in the cable and the connection between the cable and the external power supply, reducing the charging efficiency. At the same time, the high temperature will damage the charging gun and even cause a fire.

[0018] It should be noted that, since the charging gun acts as a bridge between the electric vehicle and the charging pile, it will overheat during high-power charging when charging the electric vehicle. Once the actual temperature of the charging gun is higher than the temperature that the charging gun's own material can withstand, it will damage the charging gun and even fail to work properly. Therefore, a charging gun with a cooling system is conventionally used. This cooling system can control the circulation of liquid coolant inside the charging gun and the cable to take away the heat generated when the current flows through the charging gun and the charging cable, so as to prevent the charging gun from overheating and improve charging efficiency and safety. However, in actual applications, when the control device detects that the current temperature of the charging gun exceeds the safety value and controls the cooling system to work, the temperature of the charging gun is still rising. If the cooling system fails, the temperature of the charging gun will rise sharply during high-current charging, which is likely to cause the actual temperature of the charging gun to exceed the material tolerance temperature. Therefore, the existing solution still cannot fully protect the charging gun.

[0019] To this end, the present invention proposes a charging pile control method, referring to Figure 1 , the charging pile includes a charging gun, and the charging pile control method includes: Step S100, obtaining the temperature of the charging gun, and calculating the temperature rise slope of the charging gun; Step S200: When the temperature rise slope is greater than a preset slope, the charging gun is controlled to be in a non-working state.

[0020] In this embodiment, the charging pile control method can be applied to a charging pile system. For example, a control device of the charging pile system is integrated with a memory for storing the charging pile control method of the present invention and a processor for executing the charging pile control method of the present invention. The control device can be implemented by a main controller, such as an MCU, a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), a PLC, a SOC (System On Chip), etc.

[0021] Specifically, when it is necessary to obtain the temperature of the charging pile, a thermistor sensor, a thermocouple sensor, a temperature sensor, a platinum thermistor temperature sensor and a digital output sensor can be used, and then the temperature rise slope of the charging gun can be obtained through a software algorithm or a hardware detection circuit. For example, the main controller mentioned above can convert the temperature of the charging gun output by the temperature sensor into a temperature rise slope that changes with time according to a preset calculation rule.

[0022] In this embodiment, the temperature rise slope of the charging gun is calculated using the following formula: ; In the formula, is the temperature rise slope of the charging gun; is the temperature detected at the first time point; is the temperature detected at the second time point; is the time interval between the first time point and the second time point.

[0023] refer to Figure 4 , curve A is the temperature detected by the control device, and curve B is the actual temperature of the charging gun. Figure 4 It can be seen that if the temperature sensor detects that the current temperature of the charging gun is 100°C, and the tolerance temperature of the charging gun's own material is 120°C, the main controller determines that the charging gun needs to be cooled according to the output result of the temperature sensor, and controls and controls the cooling system to work. The actual temperature of the charging gun may have exceeded 120°C, which will undoubtedly cause damage to the charging gun. Figure 4 By observing the temperature rise slope curve, it can be seen that before the charging gun temperature is far below 120°C, if the charging pile system fails, such as a cooling system failure, the temperature rise slope of the charging gun will increase. Therefore, in the charging pile control scheme of the present invention, when the temperature rise slope is greater than the preset slope, the charging gun is controlled to stop working. In this way, the charging gun stops working before reaching the tolerance temperature, which protects the charging gun and improves the reliability and safety of the charging pile system.

[0024] It should be noted that the reference Figure 5The control device may include a sampling and conditioning circuit, an amplifying and isolating circuit, an AD conversion chip, a CPU, a hardware comparison circuit, a CCU, etc. Among them, the temperature sensor used to detect the temperature of the charging gun can detect the temperature of at least one of the contact area (DC+, DC-) and the crimping area (DC+, DC-). In the present invention, the temperature of the contact area and / or the crimping area inside the charging gun is obtained by a temperature sensor (one or more), and output to the sampling and conditioning circuit, and the temperature signal (including the internal temperature information of the charging gun) is converted into a voltage signal. After a part of it is output to the amplifying and isolating circuit for amplification and isolation, it is converted into a digital signal through the AD conversion chip and enters the CPU, and the collected internal temperature information of the charging gun is transmitted to the charging control unit (CCU) through the communication interface (RS485 or CAN or other communication interface), and the charging control unit performs charging current limitation or protection according to a pre-set control strategy. For example, when the CPU determines that the temperature of the charging gun is greater than the preset first temperature, it executes a current limiting program or a shutdown program. This part of the protection is the mainstream temperature detection and over-temperature protection mode of the current charging equipment. In addition, the voltage signal output by the sampling and conditioning circuit is also output to the hardware comparison circuit to form a hardware over-temperature protection circuit. For example, the input end of the comparator is connected to the output end of the sampling and conditioning circuit, and the reference end of the comparator is connected to a preset protection value (such as a preset first temperature). When the value connected to the input end of the comparator is greater than the value of the reference end of the comparator, the comparator outputs an over-temperature fault signal to the CCU, that is, after detecting that the temperature of any detection point inside the charging gun exceeds the set protection value, the over-temperature fault signal will be immediately fed back to the CCU, and the CCU will start the fault shutdown and delay for a period of time to cut off the main circuit contactor. At the same time, the sampling and conditioning circuit outputs to the temperature rise slope generation circuit, where the temperature rise slope generation circuit is used to calculate the temperature rise slope and output it to the hardware comparison circuit. When it is detected that the temperature rise slope of any detection point of the charging gun exceeds the set value, the CCU will start the over-temperature protection function.

[0025] In this embodiment, since the charging current of the high-power charging system is very large, a liquid cooling solution is required. In the high-current charging state, when the cooling system fails, the temperature of the charging gun will rise rapidly. Since the temperature detection circuit has a certain hysteresis, if only the second part of the hardware comparison circuit is used for over-temperature protection, it may lead to untimely protection, and the internal temperature of the charging gun exceeds the tolerance value of the insulating material, thereby damaging the insulating material of the charging gun and even causing serious accidents. Therefore, the present invention introduces a temperature rise slope protection function for the charging device (including the charging pile), and forms a set of functionally complete and multi-redundant over-temperature protection solutions through the cooperation of the three mechanisms of software over-temperature protection, hardware over-temperature protection and temperature rise slope protection, thereby improving the safety and reliability of the charging device.

[0026] In the charging pile control method of the present invention, the temperature of the charging gun is first obtained, and the temperature rise slope of the charging gun is calculated; when the temperature rise slope is greater than the preset slope, the charging gun is controlled to be in a non-working state. In practical applications, when a fault occurs in the charging pile, the temperature rise slope of the charging gun will be higher than the temperature rise slope of the charging gun when the charging pile is working normally, that is, the preset slope. Therefore, when the temperature rise slope is greater than the preset slope, it is determined that the charging pile has a fault, and the charging gun is controlled to be in a non-working state, that is, the shutdown is triggered. In this way, it can be ensured that the temperature of the charging gun will not rise to the maximum temperature that the charging gun can withstand when the charging pile is working abnormally, and the charging gun, cable, and rechargeable battery are effectively protected, avoiding damage to the charging pile caused by high temperature when the charging pile is working abnormally, and improving the safety of the charging pile system.

[0027] In one embodiment of the present invention, after obtaining the temperature of the charging gun, the charging pile control method further includes: When the temperature of the charging gun is greater than a first preset temperature and reaches a first preset time, the output current of the charging gun is reduced to a preset current value or the charging gun is controlled to be in a non-working state; when the temperature of the charging gun is greater than a second preset temperature, the charging gun is controlled to be in a non-working state.

[0028] In this embodiment, a thermistor sensor can be set in the charging gun to detect the temperature of the charging gun. An over-temperature protection unit (TPU) and a charging control unit (CCU) can be set in the control device of the charging pile system. The temperature sampling signal output by the temperature sensor is sent to the TPU. The TPU detects the temperature of the charging gun in real time according to the temperature sampling signal. The first preset temperature, the first preset time and the second preset temperature can be set in advance by the R&D personnel. The first preset temperature (for example, 70°C) is used as a warning temperature point to prompt that the charging gun begins to approach the upper limit of the safe temperature. The first preset time (for example, 2 minutes), that is, if the temperature of the charging gun is kept above 70°C for 2 consecutive minutes, the cooling measures are triggered, such as the CCU gradually reducing the output current of the charging gun from the current value to the preset safe current value to reduce the heat generation. The second preset temperature (for example, 85°C) is used as an emergency stop temperature point. Once this temperature is reached, the power supply is immediately cut off to ensure safety. In addition, the CCU can also send a notification to the external terminal to inform the user that charging has been suspended and the reason, and it is recommended to check whether the charging equipment or environment is normal.

[0029] It is understandable that when the TPU determines that the temperature of the charging gun exceeds the second preset temperature based on the temperature sampling signal, it outputs an over-temperature fault signal to the CCU, and the CCU outputs a control signal to directly trigger a fault shutdown. At the same time, after extending the set time, the TPU directly switches to the contactor of the charging gun circuit to control the charging gun to be in an abnormal state. Among them, the second preset temperature is lower than the tolerance temperature of the charging gun material, and the second preset temperature can be set in advance by the R&D personnel through the hardware circuit.

[0030] In addition, both the over temperature protection unit (TPU) and the charging control unit (CCU) can be implemented by the above-mentioned main controller. The over temperature protection unit (TPU) and the charging control unit (CCU) can be integrated into the same circuit board to reduce the wiring area, or they can be arranged separately.

[0031] Through the above settings, the R&D personnel set the second preset temperature in advance so that when the charging gun is in an abnormal state, the actual temperature of the charging gun will not exceed the tolerance temperature (such as 130°C). This can protect the charging gun, cables and cable connections to a certain extent, thereby improving the safety of the charging pile operation.

[0032] In one embodiment of the present invention, reference Figure 2 , when the temperature of the charging gun is greater than a first preset temperature, the step of reducing the output current of the charging gun to a preset current value or controlling the charging gun to be in a non-working state specifically includes: Step S111: When the temperature of the charging gun is greater than a first preset temperature, start timing to obtain a first duration; Step S112: When the temperature of the charging gun is lower than the first preset temperature, stop timing and reset the first time duration; Step S113: When the temperature of the charging gun is greater than the second preset temperature, the charging gun is controlled to be in a non-working state, the timing is stopped, and the first duration is reset to zero; Step S114: when the first time duration reaches a first preset time duration, reducing the output current of the charging gun to a preset current value or controlling the charging gun to be in an abnormal working state.

[0033] In this embodiment, in combination with the above embodiments, a timing module can be set in the control device, so that when the temperature of the charging gun is greater than the first preset temperature, the timing module starts timing. During the timing process, when it is determined that the temperature of the charging gun is greater than the second preset temperature, it means that the internal temperature of the charging gun is close to the tolerance temperature of the charging gun material. In order to protect the charging gun, the charging gun will be immediately controlled to stop working; when the temperature of the charging gun is less than the first preset temperature, it means that the overheating of the charging gun is alleviated and does not affect its normal operation, so the timing can be cancelled and the normal charging procedure is entered. It should be noted that the temperature hysteresis value can also be set, that is, when the temperature of the charging gun is less than the difference between the first preset temperature and the temperature hysteresis value, the timing will be stopped and the first duration will be cleared. The temperature hysteresis value is to avoid the temperature being frequently switched between the timing and non-timing states near the first preset temperature, causing unnecessary consumption to the charging pile system, thereby improving the stability and reliability of the charging pile system. Among them, the timing module can be implemented by a clock chip or the main controller described above. The first preset duration is set in advance by the R&D personnel.

[0034] Specifically, if the charging gun has a temperature tolerance of 130°C, the first preset temperature is 90°C, the second preset temperature is 120°C, and the preset temperature hysteresis value is 5°C, when the actual temperature of the charging gun is 91°C, the timing module in the control device has started timing to obtain the first duration. At this time, the charging pile continues to monitor the temperature of the charging gun. If it is detected that the charging gun exceeds 120°C, it will immediately trigger a fault shutdown to control the charging gun in an abnormal state; at the same time, if the charging gun temperature is monitored to be lower than 85°C, it means that the overheating of the charging gun has been alleviated, the timing is terminated and the first duration is reset to zero, and the charging gun can still work normally. If the first duration reaches the first preset duration, the time when the charging gun temperature exceeds 90°C has reached the first preset duration, it may be that the cooling system fails to cool the charging gun or the charging line fails, such as short circuit, loose virtual connection, poor contact, etc. Continuing to charge at the current current may cause damage to the charging gun, so the charging control unit CCU will reduce the output current of the charging gun to the set current value, or directly trigger a fault shutdown to control the charging gun in an abnormal state.

[0035] It should be noted that limiting the output current of the charging gun to the set current value can protect the charging gun and extend the working time of the charging gun as much as possible, so that the charging pile can charge the power battery of the electric vehicle, thereby improving the user's charging experience.

[0036] In another embodiment of the present invention, when the temperature of the charging gun is greater than a first preset temperature, the step of reducing the output current of the charging gun to a preset current value or controlling the charging gun to be in a non-working state specifically includes: When the temperature of the charging gun is greater than the first preset temperature, calculating the temperature rise slope of the charging gun in real time to obtain a first temperature rise slope of the charging gun; When the first temperature rise slope is greater than a preset slope, the charging gun is controlled to be in a non-working state.

[0037] In the present embodiment, in combination with the contents of the above embodiments, when the temperature signal is output to the charging control unit CCU, when the CCU determines that the temperature of the charging gun is greater than the first preset temperature, the temperature rise slope generating circuit starts to calculate the temperature rise slope of the charging gun. At any time, if the temperature rise slope of the charging gun is greater than the preset slope, the charging control unit CCU will immediately trigger a fault shutdown and control the charger to an abnormal state. In this way, before determining that the cooling system has failed and may cause damage to the charging gun and the charging cable, the method of detecting the temperature rise slope can be used to stop charging before the actual temperature of the charging gun reaches the tolerance temperature of the charging gun material. This improves the reliability and safety of the charging pile system. Compared with the previous embodiment, increasing the temperature rise slope for control is more accurate than controlling according to temperature, further improving the accuracy of the charging pile control method of the present invention.

[0038] It should be noted that when the user connects the charging gun in the charging pile to the electric car, the charging gun will start working, converting and adjusting the voltage and current to provide stable charging power. Since this process involves energy transfer, the battery of the electric car obtains the power of the rechargeable battery in the charging pile through the charging gun. In this process, the charging gun is subjected to a large amount of power and heat, so the charging gun will deposit heat, causing the temperature to rise sharply to reach the normal working temperature. When the ambient temperature is low, such as charging an electric car at the outdoor temperature in the north in winter, when the charging gun is just used to charge the electric car, the temperature rise slope of the charging gun will be higher than the temperature rise slope of the charging gun at normal room temperature. If it is judged as a fault shutdown at this time, it is obviously unreasonable.

[0039] To this end, in one embodiment of the present invention, reference Figure 3 When the temperature rise slope is greater than a preset slope, controlling the charging gun to be in a non-working state specifically includes: Step S210: when the temperature rise slope is greater than a preset slope, start timing to obtain a second duration; Step S220, continuously monitoring the temperature of the charging gun, and when the temperature of the charging gun is greater than a preset first temperature, triggering a fault shutdown, and controlling the charging gun to be in an abnormal state; Step S230, continuously monitoring the temperature rise slope of the charging gun, and when the temperature rise slope of the charging gun is less than (preset slope - second hysteresis value), stop timing; Step 240: When the second time period reaches a second preset time period, the charging gun is controlled to be in an abnormal state.

[0040] In this embodiment, when the temperature rise slope of the charging gun is greater than the preset slope, it is judged that the charging pile system may have a fault, and the charging gun temperature and temperature rise slope will be continuously monitored. If the charging gun temperature reaches the first preset temperature within the preset time (first preset duration), or the temperature rise slope is greater than the preset slope for more than the preset time (second preset duration), it indicates that the charging pile system is faulty, such as a fault in the cooling system of the charging gun or a fault in the charging line. At this time, the charging gun is controlled to stop working, so that the user can troubleshoot and handle the fault in time. Among them, the first preset duration and the second preset duration are set in advance by the R&D personnel according to actual needs. If the temperature rise slope of the charging gun drops below the difference between the preset slope and the second hysteresis value, it can be judged that the temperature rise slope increases due to the rapid temperature rise in the initial stage of charging, there is no safety risk, no fault handling is required, and the charging pile system can work normally to charge the power battery of the electric vehicle. It should be noted that the second hysteresis value is set to avoid frequent state switching when the temperature rise slope is near the preset slope. For example, if the second hysteresis value is not set, when the temperature rise slope just exceeds the preset slope, the system will start timing; and when the temperature rise slope slightly drops below the preset slope, the timing will stop. This frequent state switching not only increases the burden on the system, but may also lead to misjudgment. Therefore, by setting a reasonable second hysteresis value, it can ensure that the system is more stable in the face of temperature fluctuations, and even if there are measurement errors or natural fluctuations, the system will not frequently switch between starting and stopping timing.

[0041] Through the above settings, when the temperature rise slope of the charging gun is greater than the preset slope, it is possible to check whether the ambient temperature is too low or the charging pile system is faulty, for example, the cooling system fails and cannot cool the charging gun, or the charging line fails, short circuit, loose connection, poor contact, etc. In this way, it is avoided that the ambient temperature is too low and the temperature rise slope is higher than the preset slope, triggering a fault shutdown, and improving the accuracy of the charging pile control method of the present invention.

[0042] The present invention also provides a control device, which includes: Memory; Processor; and A charging pile control program is stored in a memory and can be run on a processor, and when the processor executes the charging pile control program, the charging pile control method as described in any one of the above items is implemented.

[0043] It is worth noting that since the control device of the present invention is based on the above-mentioned charging pile control method, the embodiments of the control device of the present invention include all technical solutions of all embodiments of the above-mentioned charging pile control method, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0044] The present invention also proposes a charging pile system, which includes the control device described above.

[0045] It is worth noting that since the charging pile system of the present invention is based on the above-mentioned control device, the embodiments of the charging pile system of the present invention include all technical solutions of all embodiments of the above-mentioned control device, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0046] The above contents are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A charging pile control method, wherein the charging pile includes a charging gun, characterized in that: The charging pile control method comprises: Obtaining the temperature of the charging gun and calculating the temperature rise slope of the charging gun; When the temperature rise slope is greater than a preset slope, the charging gun is controlled to be in a non-working state.

2. The charging pile control method according to claim 1, characterized in that: After obtaining the temperature of the charging gun, the charging pile control method further includes: When the temperature of the charging gun is greater than a first preset temperature and reaches a first preset time, the output current of the charging gun is reduced to a preset current value or the charging gun is controlled to be in a non-working state; when the temperature of the charging gun is greater than a second preset temperature, the charging gun is controlled to be in a non-working state.

3. The charging pile control method according to claim 2, characterized in that: When the temperature of the charging gun is greater than a second preset temperature, controlling the charging gun to be in a non-working state includes: When the temperature of the charging gun is greater than a second preset temperature, an over-temperature fault signal is generated, and the charging gun is controlled to be in a non-working state according to the over-temperature fault signal.

4. The charging pile control method according to claim 2, characterized in that: When the temperature of the charging gun is greater than a first preset temperature, the step of reducing the output current of the charging gun to a preset current value or controlling the charging gun to be in a non-working state specifically includes: When the temperature of the charging gun is greater than a first preset temperature, starting timing to obtain a first duration; When the temperature of the charging gun is lower than the first preset temperature, the timing is stopped and the first time length is reset to zero; When the temperature of the charging gun is greater than a second preset temperature, the charging gun is controlled to be in a non-working state, the timing is stopped, and the first duration is reset to zero; When the first time period reaches a first preset time period, the output current of the charging gun is reduced to a preset current value or the charging gun is controlled to be in a non-working state.

5. The charging pile control method according to claim 1, characterized in that: The temperature rise slope of the charging gun is calculated using the following formula: ； In the formula, is the temperature rise slope of the charging gun; is the temperature detected at the first time point; is the temperature detected at the second time point; is the time interval between the first time point and the second time point.

6. A control device, characterized in that: The control device comprises: Memory; Processor; and A charging pile control program stored in a memory and executable on a processor, wherein the processor implements the charging pile control method according to any one of claims 1 to 5 when executing the charging pile control program.

7. A charging pile system, characterized in that: The charging pile system includes the control device as claimed in claim 6.

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