Control method of split type charging gun liquid cooling system and electronic equipment

Abstract

The invention discloses a control method of a split type charging gun liquid cooling system and electronic equipment. The control method comprises the steps that S1, the gun head temperature of a charging gun and the cooling liquid outlet temperature of a booster pump are obtained; s2, correspondingly and dynamically adjusting the rotating speed of a fan and the rotating speed of a booster pump according to the temperature of the gun head and the liquid outlet temperature of the cooling liquid; the cooling effect of the charging gun can be accurately guaranteed, the energy loss can be effectively reduced, the fault probability caused by long-term non-optimal working condition operation of the system is reduced, the service life of equipment is further prolonged, and accurate temperature control and energy consumption optimization are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of split charging gun liquid cooling, and in particular to a control method of a split charging gun liquid cooling system and an electronic device. BACKGROUND

[0002] In the field of electric vehicle charging technology, split charging guns are prone to generate a large amount of heat due to the Joule effect during high-current charging. If the heat cannot be dissipated in time, it will not only shorten the service life of the charging gun, but also may cause safety risks such as insulation aging and short circuit. Therefore, how to achieve precise temperature control of the split charging gun through a liquid cooling system while considering energy consumption optimization has become an important research direction in this field.

[0003] A Chinese patent with patent number CN202210927112.6 discloses a liquid cooling charging control method and system, and a storage medium. The system includes a liquid cooling controller, a charging machine, and a BMS. The charging machine is in communication connection with the liquid cooling controller and the BMS. The liquid cooling controller is connected with a fan and an electronic oil pump in the liquid cooling circuit. The method includes: the liquid cooling controller acquires state monitoring data of the liquid cooling circuit, determines whether the state monitoring data is within a working range, if yes, triggers the charging machine to start charging, and acquires charging demand power fed back by the charging machine; after the liquid cooling controller controls the fan and the electronic oil pump to run in a first mode, if the charging demand power is lower than a power threshold, enters a second mode; when the temperature monitoring data is within a temperature difference range, enters the first mode to run, otherwise, enters a third mode.

[0004] The technical solution of the above-mentioned patent adjusts the fan air volume and the cooling liquid flow rate according to the charging demand power and the temperature monitoring data, so as to maintain the temperature of the charging cable and the gun head within the normal working range. On the basis of ensuring that the charging gun is in a safe temperature range, the scheme adjusts the operating parameters of the cooling equipment as needed, effectively reduces unnecessary energy consumption, and provides a feasible idea for the temperature control and energy efficiency balance of the charging system. However, the technical solution of the above-mentioned patent still has the problem of insufficient control precision: the core is to adjust the cooling device according to the charging power, but in fact, the temperature change of the charging gun is mainly related to the current heating in the charging process. The current is a key parameter that determines the amount of Joule heat (heat is proportional to the square of current), and the charging power is affected by voltage and current. Therefore, it is difficult to accurately match the actual heating state of the equipment by adjusting only the power. For example, under the same charging power, if the voltage is different, the corresponding charging current may be significantly different. At this time, the cooling strategy adjusted by the power cannot accurately adapt to the heating fluctuation caused by the change of the current, which may lead to insufficient cooling or excessive cooling, affecting the cooling effect and the accuracy of energy consumption optimization of the charging gun. SUMMARY

[0005] In view of the above problems of the prior art, the present application aims to provide a control method of a split type liquid cooling system of a charging gun and electronic equipment, which can accurately guarantee the cooling effect of the charging gun and effectively reduce energy loss, thereby improving the service life.

[0006] To solve the above problems, the present application provides a control method of a split type liquid cooling system of a charging gun, which comprises the following steps:

[0007] Step S1: obtaining the temperature of the head of the charging gun and the outlet temperature of the cooling liquid of the booster pump;

[0008] Step S2: according to the head temperature and the outlet temperature of the cooling liquid, respectively corresponding to the dynamic adjustment of the fan speed and the booster pump speed.

[0009] Further, the step S2 comprises:

[0010] Step S21: according to the head temperature and the outlet temperature of the cooling liquid, respectively corresponding to the matching of the fan operation strategy and the booster pump operation strategy;

[0011] Step S22: according to the fan operation strategy and the booster pump operation strategy, respectively corresponding to the control of the fan speed and the booster pump speed.

[0012] Further, the charging gun is provided with a charging gun heating working condition group; the charging gun heating working condition group comprises a plurality of differentiated charging gun heating working conditions; the fan operation strategy comprises a plurality of fan sub-operation strategies; the fan sub-operation strategy corresponds to the charging gun heating working condition one by one; the booster pump is provided with a booster pump outlet working condition group; the booster pump outlet working condition group comprises a plurality of differentiated outlet heating working conditions; the booster pump operation strategy comprises a plurality of booster pump sub-operation strategies; the booster pump sub-operation strategy corresponds to the outlet heating working condition one by one.

[0013] Further, the step S22 comprises:

[0014] According to the size of the temperature value, each of the charging gun heating working conditions is ranked by level;

[0015] According to the head temperature, the charging gun heating working condition level to which it belongs is determined;

[0016] According to the charging gun heating working condition level to which it belongs, the corresponding fan sub-operation strategy is matched.

[0017] Further, the step S22 further comprises:

[0018] Each of the fan sub-operation strategies is traversed to determine the corresponding fan speed when the charging gun cooling effect is best.

[0019] Further, the charging gun is further provided with a charging gun threshold temperature threshold, the charging gun threshold temperature threshold is less than the minimum value of the preset gun head safety temperature range;

[0020] The step S22 further includes:

[0021] When the gun head temperature is less than the charging gun threshold temperature threshold, it is determined that the level of the charging gun heat working condition to which it belongs is level one.

[0022] Further, the step S22 includes:

[0023] According to the size of the temperature value, each of the liquid outlet heat working conditions is ranked by level;

[0024] According to the cooling liquid outlet temperature, the level of the liquid outlet heat working condition to which it belongs is determined;

[0025] According to the level of the liquid outlet heat working condition to which it belongs, the corresponding booster pump sub-operation strategy is matched.

[0026] Further, the step S22 further includes:

[0027] Each of the booster pump sub-operation strategies is traversed, and the corresponding booster pump rotating speed when the booster pump liquid outlet cooling effect is best is determined.

[0028] Further, the booster pump is further provided with a booster pump threshold temperature threshold, the booster pump threshold temperature threshold is less than the minimum value of the preset cooling liquid safety temperature range;

[0029] The step S22 further includes:

[0030] When the cooling liquid outlet temperature is less than the booster pump threshold temperature threshold, it is determined that the level of the liquid outlet heat working condition to which it belongs is level one.

[0031] The second aspect of the application provides an electronic device, the electronic device includes a processor, a memory and a communication interface connected through a system bus; the memory stores a computer program; the computer program is executed by the processor to realize the steps in the control method of the split charging gun liquid cooling system of any one of the above aspects.

[0032] Compared with the prior art, the application has the following advantages:

[0033] The application constructs the control basis by collecting two core parameters of the gun head temperature and the cooling liquid outlet temperature: first, according to the two types of temperature data, the initial operation parameters of the fan and the booster pump are matched respectively to drive the equipment to start running; in this process, the gun head temperature and the cooling liquid outlet temperature are continuously collected in real time, and the rotating speed of the fan and the booster pump is dynamically adjusted according to the temperature fluctuation to form a closed-loop control mechanism of real-time monitoring and dynamic adjustment; the mechanism finally ensures that the gun head temperature and the cooling liquid outlet temperature are stably maintained in the predetermined interval, which not only accurately guarantees the cooling effect of the charging gun, but also effectively reduces the energy loss, reduces the failure probability caused by long-term non-optimal working condition operation of the system, further prolongs the service life of the equipment, and is beneficial to realize accurate temperature control and optimize energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0034] The application will be further described in detail below in combination with the drawings and specific embodiments

[0035] Figure 1 It is a structure diagram of the split type liquid cooling system of the charging gun in the embodiment one;

[0036] Figure 2 It is a flow chart of the control method in the embodiment one;

[0037] Figure 3 It is a flow chart of the control method in the embodiment one;

[0038] Figure 4 It is a control strategy flow chart in the embodiment one;

[0039] Figure 5 It is Figure 4 A local enlarged view of the A in the

[0040] Figure 6 It is Figure 4 A local enlarged view of the B in the

[0041] Figure 7 It is Figure 4 A local enlarged view of the C in the

[0042] Figure 8 It is a flow chart of the control method in the embodiment two.

[0043] The marks on the drawings: 1-liquid storage container, 2- booster pump, 3- charging gun, 4- fan, 5- radiator. DETAILED DESCRIPTION

[0044] The specific embodiments of the application will be further described below in combination with the drawings, which are used to help understand the application but do not constitute limitations on the application. In addition, the technical features involved in the various embodiments of the application described below can be combined with each other as long as they do not conflict with each other.

[0045] As Figure 1 shown, the embodiment relates to a split type liquid cooling system of charging gun, which comprises a liquid supply component and a cooling return component; the liquid supply component comprises a liquid storage container 1 and a booster pump 2, and the booster pump 2 is used to deliver the cooling liquid in the liquid storage container 1 to the charging gun 3; the cooling return component comprises a fan 4 and a radiator 5, and the fan 4 can accelerate the air flow through the radiator to take away heat and improve the cooling efficiency of the radiator 5; in the embodiment, the liquid storage container 1 is an oil can, the booster pump is an oil pump, and the cooling liquid is cooling oil.

[0046] As Figure 2 shown, the control method of the liquid cooling system specifically comprises the following steps:

[0047] Step S1: two temperature control parameters are collected, including the temperature of the gun head of the charging gun, which is detected by a first temperature sensor integrated in the charging gun; and the cooling liquid outlet temperature of the booster pump, which is detected by a second temperature sensor arranged on the booster pump, to provide a data basis for subsequent control and adjustment;

[0048] Step S2: according to the gun head temperature and the cooling liquid outlet temperature, the fan speed and the booster pump speed are dynamically adjusted respectively to optimize the operation state of the fan and the booster pump.

[0049] When it is detected that the gun head temperature or the cooling liquid outlet temperature exceeds the predetermined temperature range, it indicates that there are two core problems: one is that the heat generated by the charging gun has exceeded the current heat dissipation capacity, and the other is that the cooling liquid delivered to the charging gun does not meet the heat dissipation demand; at this time, by increasing the fan speed to strengthen the heat dissipation efficiency and increasing the booster pump speed to speed up the cooling liquid circulation speed, the gun head temperature can be quickly reduced and the cooling liquid outlet temperature can be optimized, so as to effectively guarantee the heat dissipation effect of the charging gun and avoid the influence of temperature abnormality on charging safety and efficiency.

[0050] Based on the above control method, the control basis is constructed by collecting the gun head temperature and the cooling liquid outlet temperature: first, according to the two types of temperature data, the initial operation parameters of the fan and the booster pump are matched respectively to drive the equipment to start running; in this process, the gun head temperature and the outlet temperature are continuously collected in real time, and the fan speed and the booster pump speed are dynamically adjusted according to the temperature fluctuation, forming a closed-loop control mechanism of real-time monitoring and dynamic adjustment.

[0051] This mechanism finally ensures that the gun head temperature and the cooling liquid outlet temperature are stably maintained within the preset safe range, which not only accurately guarantees the cooling effect of the gun head and avoids the influence of temperature abnormality on charging efficiency, but also effectively reduces energy loss, reduces the probability of equipment failure caused by long-term non-optimal operating conditions, further prolongs the service life of the equipment, and is conducive to realizing accurate temperature control and optimizing energy consumption.

[0052] As Figure 3 shown in the present embodiment, step S2 comprises:

[0053] Step S21: According to the gun head temperature and the cooling liquid outlet temperature, respectively corresponding to the fan operation strategy and the booster pump operation strategy;

[0054] Step S22: According to the fan operation strategy and the booster pump operation strategy, respectively corresponding to the fan speed and the booster pump speed.

[0055] The charging gun is provided with a charging gun heating working condition group; the charging gun heating working condition group includes a plurality of differentiated charging gun heating working conditions; the fan operation strategy includes a plurality of fan sub-operation strategies; the fan sub-operation strategy corresponds to the charging gun heating working condition one by one; the booster pump is provided with a booster pump outlet working condition group; the booster pump outlet working condition group includes a plurality of differentiated outlet heating working conditions; the booster pump operation strategy includes a plurality of booster pump sub-operation strategies; the booster pump sub-operation strategy corresponds to the outlet heating working condition one by one.

[0056] Step S22 comprises:

[0057] According to the size of the temperature value, the charging gun heating working conditions are ranked by level;

[0058] According to the gun head temperature, the charging gun heating working condition level to which it belongs is determined;

[0059] According to the charging gun heating working condition level to which it belongs, the corresponding fan sub-operation strategy is matched.

[0060] Step S22 further comprises:

[0061] Iterate through each fan sub-operation strategy to determine the fan speed corresponding to the best charging gun cooling effect.

[0062] The charging gun is further provided with a charging gun threshold temperature threshold, which is less than the minimum value of the preset gun head safety temperature range.

[0063] Step S22 further comprises:

[0064] When the gun head temperature is less than the charging gun threshold temperature threshold, it is determined that the level of the charging gun heating working condition to which it belongs is first level.

[0065] Step S22 further comprises:

[0066] According to the size of the temperature value, the charging gun heating working conditions are ranked by level;

[0067] According to the cooling liquid outlet temperature, the outlet heating working condition level to which it belongs is determined;

[0068] According to the liquid outlet heating working condition level, the corresponding booster pump sub-operation strategy is matched.

[0069] Step S22 further includes:

[0070] The booster pump sub-operation strategy is traversed to determine the corresponding booster pump speed when the booster pump liquid outlet cooling effect is best.

[0071] The booster pump is also provided with a booster pump threshold temperature threshold, which is less than the minimum value of the preset coolant safe temperature range;

[0072] Step S22 further includes:

[0073] When the coolant outlet temperature is less than the booster pump threshold temperature threshold, it is determined that the corresponding liquid outlet heating working condition level is level one.

[0074] It should be noted that the fan operation strategy includes "target fan speed" (i.e. the set speed that the fan needs to reach), and the booster pump operation strategy includes "target booster pump speed" (i.e. the set speed that the booster pump needs to reach), to ensure that the speed adjustment has a clear basis for execution.

[0075] Based on the above steps, through differential condition division and accurate strategy adaptation, an efficient charging gun temperature control system is constructed: first, according to the different ranges of gun head temperature, the corresponding charging gun heating working condition is divided, and each type of heating working condition is matched with a dedicated fan sub-operation strategy, which can directly call the adapted fan control scheme according to the real-time gun head temperature; secondly, according to the coolant outlet temperature, different booster pump liquid outlet working conditions are also divided according to the temperature interval difference, and corresponding booster pump sub-operation strategies are configured for each type of liquid outlet working condition, realizing the dynamic matching of coolant outlet temperature and booster pump strategy, and ensuring that the booster pump running state fits the actual temperature control demand.

[0076] On this basis, through comparative analysis of the fan and booster pump operation strategies, the optimal operation scheme considering multiple targets can be selected; this scheme not only can realize accurate cooling of the charging gun, effectively guaranteeing the temperature control effect, but also can further reduce energy loss, reduce the probability of equipment failure, and prolong the service life of the equipment.

[0077] Specifically, the charging gun heating working condition in this embodiment includes six, and the fan sub-operation strategy is correspondingly configured with six; the booster pump liquid outlet working condition in this embodiment includes six, and the booster pump sub-operation strategy is correspondingly configured with six.

[0078] As shown in Figures 4 to 7 The following specific example of charging gun heating working condition level comparison is used for illustration: initial state: the gun head temperature is 57℃, and it is determined that the current charging gun heating working condition is working condition 2;

[0079] Temperature rise scenario: The temperature of the charging gun head rises from 57℃ to 62℃, which corresponds to the actual heating condition of the charging gun as condition 3; since the actual condition 3 level is higher than the current condition 2, the current heating condition of the charging gun is switched to condition 3.

[0080] The first temperature drop scenario: The gun head temperature drops from 62℃ to 59℃, which corresponds to the actual charging gun heating condition as condition 2; Since the actual condition 2 level is lower than the current condition 3, the current charging gun heating condition is switched to condition 2.

[0081] Scenario of secondary temperature drop: The temperature of the charging gun head drops from 59℃ to 56℃, which corresponds to the actual heating condition of the charging gun still being condition 2; since the actual condition 2 is consistent with the current condition 2 level, the current heating condition of the charging gun is maintained as condition 2.

[0082] like Figures 4 to 7 As shown, the following specific example of comparing the booster pump outlet operating conditions is used to illustrate the following: Initial state: The coolant outlet temperature is 37℃, and the current booster pump outlet operating condition is determined to be condition 2; Temperature rise scenario: The coolant outlet temperature rises from 37℃ to 42℃, corresponding to the actual booster pump outlet operating condition being condition 3; Since the actual operating condition 3 is higher than the current operating condition 2, the current booster pump outlet operating condition is switched to condition 3;

[0083] Scenario of first temperature drop: Coolant outlet temperature drops from 42℃ to 39℃, corresponding to actual booster pump outlet condition 2; Since actual condition 2 is lower than the current condition 3, the current booster pump outlet condition is switched to condition 2.

[0084] Scenario of secondary temperature drop: The coolant outlet temperature drops from 39℃ to 36℃, and the actual booster pump outlet condition is still condition 2. Since the actual condition 2 is consistent with the current condition 2, the current booster pump outlet condition is maintained as condition 2.

[0085] It should be noted that, as Figures 4 to 6 As shown, in this embodiment, the levels of the charging gun heating condition and the booster pump liquid discharge condition are arranged in a progressively increasing manner from top to bottom, that is, condition 1 is the lowest level and condition 6 is the highest level, and the corresponding fan speed and booster pump speed increase sequentially.

[0086] The level of the charging gun heating working condition and the booster pump liquid outlet working condition is essentially a classification determination of the actual operation load of the liquid cooling system. Through level comparison, the current working condition can be always aligned with the actual state: when the actual working condition level rises, timely switching to the high-level working condition can avoid the equipment being unable to meet the high load demand under the low-level working condition; when the actual working condition level decreases, timely switching to the low-level working condition can avoid the equipment being over-operated under the high-level working condition, thereby reducing the operation instability risk from the root; at the same time, when the actual working condition level is lower than the current working condition, timely downgrading can reduce the invalid energy consumption and avoid energy waste; when the actual working condition level is consistent with the current working condition, maintaining the original working condition can avoid resource loss caused by meaningless switching, and both demand and energy saving are taken into account.

[0087] In step S22, two preset threshold values need to be set: the charging gun threshold temperature threshold is lower than the minimum value of the charging gun heating working condition corresponding gun head temperature range, and the booster pump threshold temperature threshold is lower than the minimum value of the booster pump liquid outlet working condition corresponding cooling liquid outlet temperature range;

[0088] The fan runs according to the determined adaptive sub-operation strategy, when the gun head temperature is lower than the charging gun threshold temperature threshold, the current charging gun heating working condition is switched to the secondary working condition, and the fan runs according to the fan sub-operation strategy corresponding to the secondary working condition;

[0089] The booster pump runs according to the determined adaptive sub-operation strategy, when the cooling liquid outlet temperature is lower than the booster pump threshold temperature threshold, the current booster pump liquid outlet working condition is switched to the secondary working condition, and the booster pump runs according to the booster pump sub-operation strategy corresponding to the secondary working condition.

[0090] As shown in the following specific examples of the fan operation strategy: Figures 4 to 7

[0091] Initial state: gun head temperature 62℃, adapt to charging gun heating working condition 3, fan runs at 60% of rated speed;

[0092] When the gun head temperature drops to 60℃, working condition 3 is still maintained, and the fan runs at 60% of rated speed;

[0093] When the gun head temperature drops to 50℃ (lower than the charging gun threshold temperature threshold 57℃), the charging gun heating working condition 2 is switched to, and the fan runs at 45% of rated speed;

[0094] When the gun head temperature rises to 57℃, working condition 2 is maintained, and the fan continues to run at 45% of rated speed.

[0095] As shown in the following specific examples of the booster pump operation strategy: Figures 4 to 7

[0096] Initial state: cooling liquid outlet temperature 42℃, adapt to booster pump liquid outlet working condition 3, booster pump runs at 60% of rated speed; ​​

[0097] When the outlet temperature of the cooling liquid drops to 40℃, the working condition 3 is still maintained, and the booster pump is kept running at 60% of the rated speed;

[0098] When the outlet temperature of the cooling liquid drops to 30℃ (lower than the threshold value of the booster pump threshold temperature 37℃), the working condition 2 of the booster pump outlet is switched to, and the booster pump is operated at 45% of the rated speed;

[0099] When the outlet temperature of the cooling liquid rises to 37℃, the working condition 2 is maintained, and the booster pump continues to operate at 45% of the rated speed.

[0100] The difference between the threshold value of the charging gun threshold temperature and the minimum value of the charging gun heating working condition temperature range, and the difference between the threshold value of the booster pump threshold temperature and the minimum value of the booster pump outlet working condition temperature range, together constitute a return difference interval, and the difference value in this embodiment is 8℃; by using the return difference interval, the working condition is avoided to be frequently switched: when the temperature drops to the minimum value of the current working condition temperature range, the fan and the booster pump are not immediately switched, but still operated in the current working condition; only when the temperature drops below the preset threshold value, the secondary working condition switching is triggered; and when the temperature rises, as long as the maximum value of the temperature range of the secondary working condition is not broken, the fan and the booster pump remain in the current working condition, avoiding repeated adjustment of the strategy caused by slight fluctuations, thereby reducing unnecessary working condition switching, reducing the start-stop frequency and speed mutation of the fan, the booster pump and other devices, reducing mechanical loss and energy waste, and at the same time ensuring the continuity and reliability of the cooling effect.

[0101] Step S22 further comprises: the adapted fan operation strategy and the booster pump operation strategy need to be compared and analyzed, the core is the comparison of the speed parameters of the two, and the following screening rules are executed:

[0102] If the fan speed is higher than the booster pump speed, the booster pump maintains the current speed, and the fan operates at the speed of its adapted strategy;

[0103] If the fan speed is lower than the booster pump speed, the booster pump operates at the speed of its adapted strategy, and the fan maintains the current speed.

[0104] Through the direct comparison of the speed parameters, the priority of the fan and the booster pump in the cooperative operation is determined, the consistency and rationality of the strategy execution are ensured, and finally the optimal operation strategy is used to cooperatively control the speed of the fan and the booster pump.

[0105] Embodiment Two

[0106] As shown in Figure 8 , the technical solution of the second embodiment is different from that of the first embodiment, and in the control method of the liquid cooling system in the second embodiment, step Sa needs to be executed before step S1, and the specific process is as follows:

[0107] Detecting whether the liquid cooling system has a fault: if a fault occurs, the liquid cooling system enters a fault mode; if there is no fault, the liquid cooling system enters a working state;

[0108] Determining whether the charging gun is in a charging state;

[0109] When the charging gun is in a non-charging state, the fan and the booster pump continue to run at the speed before the end of the charging, and three temperature control parameters (gun head temperature, cooling liquid outlet temperature, and ambient temperature) are synchronously collected;

[0110] By comparing and analyzing the temperature differences of the gun head temperature, the cooling liquid outlet temperature, and the ambient temperature, the working state of the booster pump is dynamically switched;

[0111] When the booster pump is switched to a standby state, the fan is correspondingly switched to a standby state.

[0112] The ambient temperature can be detected by a thermometer to obtain the ambient temperature.

[0113] The above step Sa ensures that the liquid cooling system can maintain a reasonable operation rhythm during the charging interval through pre-fault detection and dynamic regulation in the non-charging state, and prepares for the next charging.

[0114] In the temperature difference comparison and analysis link of step Sa, two types of key temperature differences need to be calculated: the difference between the gun head temperature and the ambient temperature is determined as the first temperature difference, and the difference between the cooling liquid outlet temperature and the ambient temperature is determined as the second temperature difference; when the first temperature difference and the second temperature difference are both lower than the preset threshold value determined for the temperature difference, the booster pump state switching is triggered, and the booster pump is switched to a standby state.

[0115] Based on the above steps, the reasonableness of the standby switching of the booster pump is ensured through the double conditions that both temperature differences meet the standards. Only when the differences between the gun head temperature, the cooling liquid outlet temperature, and the ambient temperature are all at a low level, and there is no need for continuous active temperature control, can the standby state be entered, which avoids the accumulation of residual heat caused by premature standby and prevents energy waste caused by excessive operation.

[0116] When the liquid cooling system fails, the booster pump is first stopped; if the charging gun is in a charging state at this time, the output current is simultaneously limited; after the fault is eliminated, the liquid cooling system is switched to a working state, and the limitation on the output current is removed.

[0117] Based on the above steps, through the double protection of fault stopping the pump and limiting the current during charging, the charging safety is prioritized when the liquid cooling system is abnormal, avoiding the risk of overheating caused by continuous large current charging in the absence of cooling; and after the fault is eliminated, the state is reset, ensuring that the liquid cooling system can quickly recover to normal working ability, taking into account safety and use continuity.

[0118] When the liquid cooling system is in standby state, the state determination and switching are performed according to the following steps:

[0119] Fault detection is performed on the liquid cooling system: if a fault is detected, the liquid cooling system is immediately switched from the standby state to the fault state;

[0120] If no fault is detected, the relevant parameters are further determined, and only when the demand current, the gun head temperature and the cooling liquid outlet temperature are all greater than or equal to the respective predetermined threshold values, the liquid cooling system is switched from the standby state to the working state.

[0121] Based on the above steps, through the sequence of fault early warning and parameter determination, the safety of the equipment in standby state is ensured, and the working state can be accurately started based on the actual operation demand, avoiding invalid start and stop, and taking into account safety and energy efficiency.

[0122] In this embodiment, the predetermined threshold value of the demand current is 125A, the predetermined threshold value of the gun head temperature is 75℃, and the predetermined threshold value of the cooling liquid outlet temperature is 60℃. The three predetermined threshold values can be adjusted according to actual needs.

[0123] In step Sa, the outlet pressure is collected in real time by a pressure sensor, and compared and analyzed with a preset pressure threshold value: when the detected outlet pressure is greater than the predetermined threshold value, it is determined that the liquid cooling system has a fault.

[0124] Based on the above steps, the quantitative pressure parameter is used as the basis for fault identification, which can quickly and accurately capture the pressure overrun problem caused by pipe blockage, pump body abnormality, etc., providing a clear trigger condition for subsequent fault mode switching, and ensuring the timeliness and accuracy of fault response.

[0125] In this embodiment, the predetermined threshold value of the outlet pressure is 0.7MPA.

[0126] Embodiment three

[0127] This embodiment three relates to an electronic device, which includes a processor, a memory and a communication interface connected by a system bus; the memory stores a computer program; the computer program is executed by the processor to realize the steps in the control method of the split type charging gun liquid cooling system provided in any of the above embodiments.

[0128] The above embodiments of the present application are not a limitation on the protection scope of the present application, and the implementation of the present application is not limited thereto, and any other modifications, replacements or changes to the above structure of the present application according to the above content of the present application, according to the ordinary technical knowledge and common practice in the art, without departing from the above basic technical idea of the present application, shall fall within the protection scope of the present application.

Claims

1. A control method of a split type liquid cooling system of a charging gun, characterized in that, The method comprises the following steps: Step S1: obtaining the temperature of the nozzle head of the charging gun and the outlet temperature of the cooling liquid of the booster pump; Step S2: dynamically adjusting the rotating speed of the fan and the rotating speed of the booster pump according to the temperature of the nozzle head and the outlet temperature of the cooling liquid, respectively.

2. The control method of the split charging gun liquid cooling system according to claim 1, characterized in that, The step S2 comprises: Step S21: matching the fan operation strategy and the booster pump operation strategy according to the temperature of the nozzle head and the outlet temperature of the cooling liquid, respectively; Step S22: controlling the rotating speed of the fan and the rotating speed of the booster pump according to the fan operation strategy and the booster pump operation strategy, respectively.

3. The control method of the split charging gun liquid cooling system according to claim 2, characterized in that, The charging gun is provided with a charging gun heating working condition group; the charging gun heating working condition group comprises a plurality of differential charging gun heating working conditions; the fan operation strategy comprises a plurality of fan sub-operation strategies; the fan sub-operation strategy corresponds to the charging gun heating working condition one by one; the booster pump is provided with a booster pump outlet working condition group; the booster pump outlet working condition group comprises a plurality of differential outlet heating working conditions; the booster pump operation strategy comprises a plurality of booster pump sub-operation strategies; the booster pump sub-operation strategy corresponds to the outlet heating working condition one by one.

4. The control method of the split charging gun liquid cooling system according to claim 3, characterized in that, The step S22 comprises: sequentially ranking the charging gun heating working conditions according to the temperature values; determining the charging gun heating working condition level to which the temperature of the nozzle head belongs according to the temperature of the nozzle head; matching the corresponding fan sub-operation strategy according to the charging gun heating working condition level.

5. The control method of the split charging gun liquid cooling system according to claim 4, characterized in that, The step S22 further comprises: traversing each fan sub-operation strategy to determine the corresponding fan rotating speed when the cooling effect of the charging gun is best.

6. The control method of the split charging gun liquid cooling system according to claim 4, characterized in that, The charging gun is further provided with a charging gun threshold temperature threshold value, which is less than the minimum value of the preset nozzle head safety temperature range; The step S22 further comprises: when the temperature of the nozzle head is less than the charging gun threshold temperature threshold value, determining that the level of the charging gun heating working condition to which the temperature of the nozzle head belongs is the first level.

7. The control method of the split charging gun liquid cooling system according to claim 3, wherein The step S22 comprises: sequentially ranking the outlet heating working conditions according to the temperature values; determining the outlet heating working condition level to which the outlet temperature of the cooling liquid belongs according to the outlet temperature of the cooling liquid; matching the corresponding booster pump sub-operation strategy according to the outlet heating working condition level.

8. The control method of the split charging gun liquid cooling system according to claim 6, wherein The step S22 further comprises: traversing each booster pump sub-operation strategy to determine the corresponding booster pump rotating speed when the outlet cooling effect of the booster pump is best.

9. The control method of the split charging gun liquid cooling system according to claim 7, characterized in that , The booster pump is further provided with a booster pump threshold temperature threshold value, which is less than the minimum value of the preset cooling liquid safety temperature range; The step S22 further comprises: when the outlet temperature of the cooling liquid is less than the booster pump threshold temperature threshold value, determining that the outlet heating working condition level to which the outlet temperature of the cooling liquid belongs is the first level.

10. An electronic device, comprising: The electronic device comprises a processor, a memory and a communication interface connected through a system bus; the memory stores a computer program; when the computer program is executed by the processor, the steps of the control method of the split charging gun liquid cooling system according to any one of claims 1-9 are realized.

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