Automatic on-demand allocation of liquid cooling method, liquid cooling super charging pile, terminal and medium

Abstract

The present application relates to an automatic on-demand liquid cooling method, a liquid cooling super charging pile, a terminal and a medium, which includes obtaining a link signal connecting a gun head to a vehicle charging port; outputting a liquid injection start signal according to the link signal to perform a liquid injection operation on a liquid cooling channel in a vehicle charging gun line; obtaining the outlet coolant temperature of the liquid cooling channel in the vehicle charging gun line; outputting a liquid injection flow control signal or a liquid injection stop signal according to the outlet coolant temperature; obtaining a link break signal or a charging completion signal when the gun head is disconnected from the vehicle charging port; outputting a recovery signal for controlling the recovery of the coolant in the liquid cooling channel in the vehicle charging gun line according to the link break signal or the charging completion signal. The present application has the effect of reducing the weight of the vehicle charging gun line during the process of taking and placing the vehicle charging gun line and improving the user charging experience.

Description

Technical Field

[0001] The present application relates to the field of liquid-cooled super charging piles, and more particularly to an automatic on-demand liquid cooling method, a liquid-cooled super charging pile, a terminal and a medium. Background Art

[0002] When a conventional DC charging gun is in operation, its current is usually limited to less than 250A to ensure the stability and safety of the charging process. However, with the development of super-fast charging technology, the current that the charging gun can withstand has reached about 500A, which greatly improves the charging efficiency, but also brings significant challenges, namely the significant increase in thermal effects. Currently, cooling is mainly achieved through air cooling and liquid cooling.

[0003] Air cooling technology relies on air cooling modules and natural cooling gun wires to reduce the temperature through heat exchange with air. However, in the face of high heat generation caused by high-current fast charging, if air cooling continues to be used, thicker copper wires must be used to increase the heat dissipation area. This will not only increase manufacturing costs, but also increase the weight of the charging gun wire, which is not only inconvenient to use, but may also pose a safety hazard due to excessive weight. In addition, a significant limitation of the air cooling method is that it cannot directly and effectively cool the core of the cable.

[0004] Liquid cooling technology has shown obvious advantages. It combines a liquid cooling module with a liquid cooling gun line, and allows coolant (such as ethylene glycol, oil, etc.) to flow through the liquid cooling cable to directly remove the heat generated by the cable. This method not only has high heat dissipation efficiency, but also enables small-section cables to carry large currents while maintaining low temperature rise, greatly improving charging safety.

[0005] Regarding the above-mentioned related technologies, whether it is air-cooled or water-cooled fast charging gun cable, its own weight should not be underestimated, which affects the user experience of electric vehicle charging users when taking the car charging gun cable. Summary of the invention

[0006] On the one hand, in order to improve the user experience when taking the car charger cable, the present application provides a liquid cooling method that automatically allocates liquid cooling on demand.

[0007] The present application provides an automatic on-demand allocation liquid cooling method, which adopts the following technical solution:

[0008] An automatic on-demand allocation liquid cooling method, comprising:

[0009] Get the link signal between the gun head and the vehicle charging port;

[0010] Output the injection start signal according to the link signal to inject liquid into the liquid cooling channel in the vehicle charging gun line;

[0011] Get the outlet coolant temperature of the liquid cooling channel in the vehicle charging gun line;

[0012] Output injection flow control signal or injection stop signal according to outlet coolant temperature;

[0013] Obtain a disconnection signal or a charging completion signal when the gun tip is disconnected from the vehicle charging port;

[0014] According to the disconnection signal or the charging completion signal, a recovery signal is output to control the coolant recovery in the liquid cooling channel of the charging gun line of the recovery vehicle.

[0015] By adopting the above technical solution, the coolant in the liquid cooling channel of the car charger gun cable is recovered before taking out the car charger gun cable and before returning the car charger gun cable, so as to reduce the weight of the car charger gun cable during the process of taking and placing the car charger gun cable, thereby improving the user charging experience.

[0016] Preferably, after outputting the injection start signal according to the link signal and performing the injection operation on the liquid cooling channel in the vehicle charging gun line, it also includes:

[0017] Outputting an inlet start signal of a solenoid valve for opening the inlet of a liquid cooling channel in a vehicle charging gun line according to the liquid injection start signal;

[0018] Acquire a first hydraulic pressure signal in a liquid cooling channel in a vehicle charging gun line;

[0019] When the first hydraulic pressure reaches the pressure threshold, an outlet start signal is outputted to open the outlet of the solenoid valve of the liquid cooling channel in the vehicle charging gun line.

[0020] By adopting the above technical solution, when the first hydraulic pressure reaches the pressure threshold, it indicates that the liquid cooling channel is full, thereby avoiding damage to the liquid cooling channel caused by continuous liquid injection.

[0021] Preferably, after obtaining the link signal of the connection between the gun head and the vehicle charging port, the method further includes:

[0022] Get the coolant temperature value of the liquid cooling channel in the car charger line;

[0023] When the coolant temperature reaches a first temperature threshold and the temperature rise rate is not lower than the first temperature rise threshold, an injection start signal is output.

[0024] By adopting the above technical solution, when the coolant temperature value does not reach the first temperature threshold, or reaches the first temperature threshold but the temperature rise rate is not lower than the first temperature rise threshold, it means that the power cable only needs natural heat dissipation and there is no need to output a liquid injection start signal.

[0025] Preferably, after outputting the injection start signal according to the link signal and performing the injection operation on the liquid cooling channel in the vehicle charging gun line, it also includes:

[0026] Outputting an inlet start signal of a solenoid valve for opening the inlet of a liquid cooling channel in a vehicle charging gun line according to the liquid injection start signal;

[0027] The temperature rise rate of the coolant in the liquid cooling channel is obtained. When the temperature rise rate of the coolant is higher than the second temperature rise rate, an outlet start signal for opening the solenoid valve at the outlet of the liquid cooling channel in the vehicle charging gun line is intermittently output, or an outlet start signal for adjusting the opening of the outlet flow valve of the liquid cooling channel in the vehicle charging gun line is output.

[0028] By adopting the above technical solution, when the charging power is too large and the power cable heats up quickly, the heat dissipation efficiency can be improved by starting the thermal cycle in advance and discharging the heated coolant.

[0029] Preferably, the switching cycle ratio of the outlet start signal of the intermittent output of the solenoid valve for opening the outlet of the liquid cooling channel in the vehicle charging gun line is positively correlated with the coolant temperature of the liquid cooling channel in the vehicle charging gun line, and the flow valve opening of the outlet start signal output for adjusting the opening of the flow valve at the outlet of the liquid cooling channel in the vehicle charging gun line is positively correlated with the coolant temperature of the liquid cooling channel in the vehicle charging gun line.

[0030] By adopting the above technical solution, the higher the coolant temperature in the liquid cooling channel, the larger the opening of the outlet flow valve, or the larger the switching cycle ratio of the outlet solenoid valve, so as to quickly dissipate heat and reduce heat accumulation.

[0031] Preferably, the step of outputting a liquid injection flow control signal or a liquid injection stop signal according to the outlet coolant temperature includes:

[0032] When the temperature rise rate of the outlet coolant temperature is less than zero, an injection flow control signal or an injection stop signal is output.

[0033] By adopting the above technical solution, when the temperature rise rate of the outlet coolant temperature is less than zero, it indicates that trickle charging has begun or charging is completed. At this time, the injection flow rate can be reduced or the injection can be stopped to achieve energy saving.

[0034] Preferably, after outputting the injection start signal according to the link signal, the method further comprises:

[0035] Get external ambient temperature information;

[0036] If the external ambient temperature is lower than the set temperature threshold, a cooling compensation signal is output to open the liquid cooling channel of other car charging gun lines connected to the liquid cooling channel of the current car charging gun line, and the coolant temperature of other liquid cooling channels is monitored;

[0037] If the coolant temperature of other liquid cooling channels is higher than the set warning value, an external adjustment signal for reducing the circulation flow or flow rate with other liquid cooling channels is output, or an external closing signal for closing the circulation with other liquid cooling channels is output.

[0038] By adopting the above technical solution, if the external ambient temperature is lower than the set temperature threshold, it means the weather is cold. The coolant delivered in the liquid cooling channel of the charging car charger gun cable can preheat other idle car charger gun cables and their gun heads, so that other electric vehicle users will not easily get their hands frozen when taking the car charger gun cables, thereby improving the user experience.

[0039] Secondly, in order to improve the user experience when taking the car charging gun line, the present application provides a liquid-cooled super charging pile that is automatically allocated on demand.

[0040] The present application provides an automatic on-demand allocation of liquid-cooled super charging pile, which adopts the following technical solution:

[0041] An automatic on-demand allocation liquid-cooled super charging pile, comprising:

[0042] A signal acquisition module is used to obtain a link signal between the gun head and the vehicle charging port;

[0043] The liquid injection start module is used to output a liquid injection start signal according to the link signal to perform liquid injection operation on the liquid cooling channel in the vehicle charging gun line;

[0044] The temperature acquisition module is used to obtain the outlet coolant temperature of the liquid cooling channel in the vehicle charging gun line;

[0045] A liquid injection stop module, used to output a liquid injection flow control signal or a liquid injection stop signal according to the outlet coolant temperature;

[0046] The coolant recovery module is used to obtain a disconnection signal or a charging completion signal indicating that the gun head is disconnected from the vehicle charging port, and output a recovery signal for controlling the recovery of the coolant in the liquid cooling channel in the vehicle charging gun line based on the disconnection signal or the charging completion signal.

[0047] On the third aspect, in order to improve the user experience when taking the car charger cable, the present application provides a smart terminal.

[0048] The present application provides an intelligent terminal, which adopts the following technical solution:

[0049] An intelligent terminal comprises a processor and a memory, wherein the memory stores a computer program which can be loaded by the processor and execute the above-mentioned automatic on-demand allocation liquid cooling method.

[0050] Fourthly, in order to improve the user experience when taking the car charger cable, the present application provides a computer-readable storage medium.

[0051] The present application provides a computer-readable storage medium, which adopts the following technical solution:

[0052] A computer-readable storage medium stores a computer program that can be loaded by a processor and execute the above-mentioned automatic on-demand allocation liquid cooling method.

[0053] In summary, the present application includes at least one of the following beneficial technical effects:

[0054] The coolant in the car charger cable will be evacuated when it is removed, thereby reducing the weight of the car charger cable during the removal and placement process and improving the user's charging experience;

[0055] When the coolant temperature value does not reach the first temperature threshold, or reaches the first temperature threshold but the temperature rise rate is not lower than the first temperature rise threshold, it means that the power cable only needs to dissipate heat naturally, and there is no need to output a liquid injection start signal, thereby achieving energy saving;

[0056] The coolant delivered in the liquid cooling channel of the charging car charger gun cable can preheat other idle car charger gun cables and their gun heads, so that other electric vehicle users will not easily get their hands frozen when taking the car charger gun cables, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of the overall structure of the liquid-cooled super charging pile of an embodiment of the present application.

[0058] Figure 2 It is a schematic diagram of the cross-sectional structure of the car charger gun line of the embodiment of the present application.

[0059] Figure 3 It is a schematic diagram of the bracket in the car charger gun line of an embodiment of the present application.

[0060] Figure 4 This is a pipeline distribution diagram of adjacent vehicle charging gun lines in an embodiment of the present application.

[0061] Explanation of the reference numerals: 1. power cable; 2. liquid cooling channel; 3. bracket. DETAILED DESCRIPTION

[0062] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0063] The present application embodiment discloses a liquid cooling method and a liquid cooling super charging pile that are automatically allocated on demand. Figure 1 , Figure 2, wherein the liquid-cooled super charging pile includes a liquid cooling pool, a radiator, a circulation pump, a controller, and a liquid cooling channel 2 arranged in the car charging gun line, wherein two circulation pumps are provided, namely an inlet circulation pump and an outlet circulation pump, which are used to pump coolant to achieve heat transfer. The inlet circulation pump and the outlet circulation pump are respectively connected to the two sides of the liquid cooling pool, the inlet circulation pump is connected to the inlet of the liquid cooling channel 2, and an inlet solenoid valve is provided between the two to control the on-off of the coolant, and an inlet flow valve can also be used to control the flow of the coolant with an adjustable opening. The outlet circulation pump is connected to the outlet of the liquid cooling channel 2, and an outlet solenoid valve is provided between the two to control the on-off of the coolant, and an outlet flow valve can also be used to control the flow of the coolant with an adjustable opening. The radiator can adopt conventional refrigeration modules such as compressors, expansion valves, evaporators, etc., or conventional forms of heat dissipation fins combined with air cooling, or a combination of the two, which will not be repeated here. The radiator is mainly placed in the host, and can also be placed in the charging pile, mainly to dissipate heat for the coolant.

[0064] The liquid cooling pool is mainly used to store coolant. Its capacity is sufficient to accommodate all the coolant in the liquid cooling channel 2, and plays the role of transferring and recycling coolant. The radial cross-section of the liquid cooling channel 2 in the car charger line is circular, and the inside is used to wrap the power cable with high heat generation, so that the heat of the power cable is taken away by the circulation of the coolant to achieve temperature control.

[0065] Reference Figure 2 , Figure 3 The inner wall of the liquid cooling channel 2 close to the power cable is made of a material with good thermal conductivity and insulation, such as silicone rubber, and the outer wall of the liquid cooling channel 2 away from the power cable is made of soft rubber material with good deformation ability. When the hydraulic pressure in the liquid cooling channel 2 drops, the outer wall of the liquid cooling channel 2 will collapse inward, so that the overall liquid storage space of the liquid cooling channel 2 is reduced. In order to avoid the collapse of the liquid cooling channel 2 causing the remaining adjacent cables, such as communication cables, to compress the original space of the liquid cooling channel 2, resulting in the liquid cooling channel 2 being blocked from returning to its original position, two solutions can be adopted. The first solution is to set a mesh bracket 3 around the outside of the liquid cooling channel 2, and the bracket 3 can be made of elastic nylon. When the liquid cooling channel 2 collapses, the bracket 3 can play a limiting role, limiting other cables from squeezing the liquid cooling channel 2 to avoid affecting its return. The second solution is to set other cables as a whole or fix them on the outer cable skin of the car charger gun line by bonding, thereby freeing up the internal space for the liquid cooling channel 2 to be used alone.

[0066] The present embodiment prefers the first scheme mentioned above, on the basis of which, support ribs are connected between the inner wall of the bracket 3 and the inner wall of the liquid cooling channel 2, at least two support ribs are provided on the same radial section of the liquid cooling channel 2, and the support ribs are distributed around the liquid cooling channel 2 at equal angles to protect the liquid cooling channel 2 at the central axis position of the bracket 3, to avoid the liquid cooling channel 2 being eccentrically arranged on one side of the bracket 3 and being compressed when it returns to its position, so that the liquid cooling channel 2 can shrink and expand normally, adjust the coolant capacity in the liquid cooling channel 2, and adjust the overall weight of the car charger line, so that the user can save effort when taking and recycling the car charger line.

[0067] Reference Figure 2 In order to facilitate the adjustment of the coolant capacity in the liquid cooling channel 2, the controller is connected to the inlet circulation pump, the outlet circulation pump, the inlet solenoid valve, and the outlet solenoid valve. The control method used by the controller is as follows:

[0068] Get the link signal between the gun head and the vehicle charging port;

[0069] Specifically, when the user unplugs the gun head of the car charger gun cable from the charging pile and inserts it into the charging port of the electric vehicle, the communication cable that comes with the gun head is connected to the electric vehicle. At this time, the controller receives a link signal.

[0070] Obtain the coolant temperature value of the liquid cooling channel 2 in the vehicle charger line according to the link signal;

[0071] When the coolant temperature reaches the first temperature threshold and the temperature rise rate is not lower than the first temperature rise threshold, a liquid injection start signal is output to perform a liquid injection operation on the liquid cooling channel 2 in the vehicle charging gun line.

[0072] Specifically, when the controller receives the link signal, the user may have just plugged in the gun head. At this time, the electric vehicle or charging pile may not be sure whether it can be used normally, and when the charging is just started, the power may not be high, and the power cable generally does not heat up quickly. For the above reasons, it is preferred not to start the injection operation first, and wait until the temperature of the internal residual coolant rises to the first temperature threshold, such as 40℃-60℃, and the temperature rise rate is not lower than the first temperature rise threshold, and then start the injection operation to avoid frequent injection and recovery of coolant due to temporary reasons, resulting in equipment loss and power consumption, wherein the first temperature rise threshold is preferably above 0.3℃ / s. The temperature rise rate is mainly used to determine whether the charging power is low, because some electric vehicles are limited by their own battery quality and cannot use fast charging, or some cold areas are too cold due to low ambient temperature, which is conducive to heat dissipation. Therefore, the power cable 1 can achieve temperature control within a safe range by natural heat dissipation alone. At this time, there is no need to enable the injection operation to increase the coolant in the liquid cooling channel 2 of the car charging gun line.

[0073] When the coolant temperature reaches the first temperature threshold but the temperature rise rate is lower than the first temperature rise threshold, the coolant temperature continues to be monitored. When the coolant temperature reaches the second temperature threshold, an injection start signal is output to inject liquid into the liquid cooling channel 2 in the vehicle charging gun line.

[0074] Specifically, when the coolant temperature reaches the first temperature threshold but the temperature rise rate is lower than the first temperature rise threshold, it means that the temperature rises slowly and may be about to reach the maximum temperature, and only natural heat dissipation is required. At this time, the coolant temperature is monitored again until the coolant temperature reaches the second temperature threshold. At this time, the liquid injection operation needs to be started to quickly lower the temperature.

[0075] Liquid injection operation: according to the liquid injection start signal, the solenoid valve used to open the inlet of the liquid cooling channel 2 in the vehicle charging gun line and the inlet start signal of the inlet circulation pump are output;

[0076] Specifically, first open the inlet solenoid valve, then start the circulation pump, and inject the coolant in the liquid cooling pool into the liquid cooling channel 2 of the vehicle charging gun line, so that the outer wall of the liquid cooling channel 2 expands, increases its own volume, and improves the heat dissipation efficiency.

[0077] Obtain the hydraulic signal in the liquid cooling channel 2 in the vehicle charging gun line;

[0078] When the first hydraulic pressure reaches the pressure threshold, an outlet start signal of the solenoid valve for opening the outlet of the liquid cooling channel 2 in the vehicle charging gun line is output.

[0079] Specifically, when the first hydraulic value of the liquid cooling channel 2 in the vehicle charging gun line rises to the point where the liquid cooling channel 2 is fully expanded, that is, when the pressure threshold is reached, it indicates that the coolant in the liquid cooling channel 2 is full. At this time, the controller controls the outlet solenoid valve to open, so that the coolant begins to circulate between the radiator and the liquid cooling pool, taking away the heat of the power cable to the greatest extent.

[0080] When the liquid injection operation is started, if the rising rate of the coolant temperature value is detected to be higher than the second temperature rise rate, the outlet start signal of the solenoid valve for opening the outlet of the liquid cooling channel 2 in the vehicle charging gun line is intermittently output, or the outlet start signal for adjusting the opening of the outlet flow valve of the liquid cooling channel 2 in the vehicle charging gun line is output.

[0081] Specifically, the coolant temperature is preferably the outlet coolant temperature of the outlet of the liquid cooling channel 2, which can be detected by a temperature sensor set before and after the outlet solenoid valve or the outlet flow valve. When the power cable is seriously heated, it is difficult to suppress the temperature of the power cable by injecting coolant without enabling the coolant circulation and without relying on the radiator. At this time, the outlet solenoid valve is opened intermittently or the opening of the outlet flow valve is adjusted, so that part of the coolant starts the thermal circulation first, so as to transfer the heat in the liquid cooling channel 2 first. At the same time, when the outlet solenoid valve is opened intermittently and the outlet flow valve is not fully opened, the coolant in the liquid cooling channel 2 can still be ensured to gradually increase, further increasing the heat dissipation capacity of the liquid cooling channel 2, so as to cope with high-power and fast-heating power cables. The ratio of the opening / closing cycle of the outlet start signal intermittently outputted to open the outlet solenoid valve of the liquid cooling channel 2 in the car charging gun line is positively correlated with the coolant temperature of the liquid cooling channel 2 in the car charging gun line, that is, the higher the outlet coolant temperature, the greater the proportion of the opening time of the outlet solenoid valve in the same cycle, so as to quickly alleviate the problem of rapid heat accumulation of power cable charging. The opening of the outlet flow valve of the liquid cooling channel 2 in the vehicle charging gun line is also positively correlated with the coolant temperature of the liquid cooling channel 2 in the vehicle charging gun line, that is, the higher the outlet coolant temperature, the greater the opening of the outlet flow valve.

[0082] When trickle charging or charging stops, the heat generated will be greatly reduced due to the low power of trickle charging, and sometimes it can even be dissipated naturally. Therefore, it is necessary to lower or turn off the cooling function. Specifically, perform the following steps:

[0083] Get the outlet coolant temperature of liquid cooling channel 2 in the vehicle charging gun line;

[0084] Output injection flow control signal or injection stop signal according to outlet coolant temperature;

[0085] Specifically, by detecting the outlet coolant temperature, the current heating efficiency of the power cable can be understood, and the inlet solenoid valve or inlet flow valve, outlet solenoid valve or outlet flow valve can be controlled through the injection flow control signal or injection stop signal to reduce or close the flow of the coolant. At the same time, the coolant temperature rise rate of the liquid cooling channel 2 in the vehicle charging gun line is obtained. When the coolant temperature rise rate is 0, it means that the heating efficiency of the power cable is consistent with the heat dissipation efficiency of the coolant. At this time, there is no need to adjust the injection coolant flow rate, so as to achieve energy saving.

[0086] Obtain a disconnection signal or a charging completion signal when the gun tip is disconnected from the vehicle charging port;

[0087] A recovery signal for controlling the coolant in the liquid cooling channel 2 in the charging gun line of the recovery vehicle is output according to the disconnection signal or the charging completion signal.

[0088] Specifically, if in the trickle charging stage, when the inlet solenoid valve or the inlet flow valve, the outlet solenoid valve or the outlet flow valve is controlled to reduce the flow of the coolant, if the outlet coolant temperature has not risen, this situation is consistent with the processing of obtaining the disconnection signal or the charging completion signal, that is, when the temperature rise rate of the outlet coolant temperature is less than zero, the injection flow control signal or the injection stop signal is output, and the following recovery steps are used for processing:

[0089] Output a flow cut-off signal for closing the inlet solenoid valve or the inlet flow valve and the inlet circulation pump;

[0090] And obtain the second hydraulic value of the liquid cooling channel 2 in the vehicle charging gun line;

[0091] When the second hydraulic pressure value drops below the set low pressure threshold, a channel sealing signal is output to close the outlet solenoid valve or the outlet flow valve, and to close the outlet flow pump.

[0092] Specifically, close the inlet solenoid valve or the inlet flow valve, turn off the inlet circulation pump, and keep the outlet solenoid valve or the outlet flow valve open, and keep the outlet circulation pump running, so that the coolant in the hydraulic channel can only go out but not enter. At this time, the coolant gradually decreases, the liquid cooling channel 2 narrows, and the second hydraulic value of the coolant begins to decrease. When the coolant in the liquid cooling channel 2 is almost exhausted, that is, the second hydraulic value drops below the set low pressure threshold, close the outlet solenoid valve or the outlet flow valve, turn off the outlet flow pump, so that the liquid cooling channel 2 is in a low volume sealed state. At this time, the overall weight of the car charging gun line is reduced, which is convenient for charging users to pick up with one hand, thereby improving the user experience. At the same time, even if the car charging gun line breaks during activity or storage, less coolant overflows, which is convenient for maintenance.

[0093] Reference Figure 2 , Figure 4 Most of the fast-charging DC charging piles on the market are currently equipped with at least two car charging gun lines to facilitate charging adjacent electric vehicles at the same time. The charging pile of this embodiment can also be equipped with three, four or even more car charging gun lines. A liquid cooling channel 2 is set in each car charging gun line. When only part of the car charging gun lines are in the charging process, after obtaining the link signal of the car charging gun line, the following steps can be performed:

[0094] Get external ambient temperature information;

[0095] If the external ambient temperature is lower than the set temperature threshold, a cooling compensation signal is output to open the liquid cooling channel 2 of other car charging gun lines connected to the liquid cooling channel 2 of the current car charging gun line, and the coolant temperature of other liquid cooling channels 2 is monitored;

[0096] If the coolant temperature of other liquid cooling channels 2 is higher than the set warning value, an external adjustment signal for reducing the circulation flow or flow rate with other liquid cooling channels 2 is output, or an external closing signal for closing the circulation with other liquid cooling channels 2 is output.

[0097] Specifically, when the external temperature is low, for example, below 10°C, other idle car charger lines can be used as natural radiators to cool the circulating coolant in the car charger lines being charged. Three-way valves are set at the inlet and outlet of the car charger lines. One of the outlets of the three-way valve is connected to the liquid cooling channel 2 of the adjacent car charger line, and the other outlet is connected to the liquid cooling pool. When the external ambient temperature is lower than the set temperature threshold, the inlet solenoid valve of the liquid cooling channel 2 of the adjacent car charger line is opened, and the outlet solenoid valve directly connected to the liquid cooling pool is closed at the same time, so as to guide the coolant to the liquid cooling channel 2 of the idle car charger line for cooling and heat dissipation. For details, please refer to Figure 4 As shown in the figure, taking two car charger lines as an example, when the left car charger line is charging and the right one is in an idle state, the solenoid valves RT1, RT2, RT3 and RT4 are opened, and the solenoid valves RT5, RT6 and RT7 are closed, the coolant will flow from the left car charger line to the right car charger line and then return to the liquid cooling pool.

[0098] When the car charger line on the right is charging and the one on the left is idle, open the solenoid valve RT7, solenoid valve RT2, solenoid valve RT3, and solenoid valve RT6, and close the solenoid valve RT1, solenoid valve RT4, and solenoid valve RT5, then the coolant will flow from the car charger line on the right to the car charger line on the left and then return to the liquid cooling pool to achieve circulation. Of course, the other car charger lines are used as auxiliary heat dissipation, and the cooling capacity provided is generally insufficient. Therefore, the solenoid valve RT5, solenoid valve RT2, and solenoid valve RT3 can be replaced with flow valves. When the coolant is input from the solenoid valve RT3 side, by adjusting the flow opening distribution of the solenoid valve RT5 and the solenoid valve RT2, part of the coolant directly enters the radiator for circulation, and the other part circulates with the help of the liquid cooling channel 2 of the idle car charger line. On the contrary, when the coolant is input from the solenoid valve RT2 side, the flow opening distribution of the solenoid valve RT5 and the solenoid valve RT3 can be adjusted. In this way, it does not hinder the use of the radiator for rapid heat dissipation, and can also use the idle car charger line to supplement the cooling capacity to achieve energy saving.

[0099] When the left and right car charger gun lines are charged at the same time, open the solenoid valve RT1, solenoid valve RT2, solenoid valve RT3, solenoid valve RT7, and solenoid valve RT5, and close the solenoid valve RT4 and solenoid valve RT6 to achieve simultaneous cooling of the two car charger gun lines. When recovering the coolant, first close the solenoid valve RT1 and the solenoid valve RT7, and then close the solenoid valve RT5 after the coolant is drained.

[0100] At the same time, a flow channel is set up in the gun head part of the car charger gun line with a solenoid valve to preheat the gun head with coolant. If the external ambient temperature is lower than the set temperature threshold, the separate liquid cooling flow channel of the gun head is opened, and the two ends of the separate liquid cooling flow channel are connected in parallel to the liquid cooling channel 2. The gun head is adjusted to a suitable temperature by controlling the opening and closing of the solenoid valves at both ends of the separate liquid cooling flow channel, so that the charging user is not easily frozen when he intends to charge and grasps the gun head of the car charger gun line, improving the user experience of using the car charger gun line in winter, especially suitable for outdoor charging in northern regions. The set temperature threshold refers to the critical value that can make human skin feel cold, such as 10°C.

[0101] The implementation principle of the liquid cooling method automatically allocated on demand in the embodiment of the present application is as follows: when the electric vehicle user intends to charge the electric vehicle, he can first take the car charging gun line at the charging pile. At this time, the liquid cooling channel 2 in the car charging gun line is in a state of less coolant. The user can easily take the car charging gun line and plug it into the charging port of the electric vehicle. At this time, the controller receives the link signal, and the power cable 1 starts to be energized to generate heat. If the charging power supported by the electric vehicle itself is low and the heat generation is small, the coolant temperature does not reach the first temperature threshold, or reaches the first temperature threshold but the temperature rise rate is not lower than the first temperature rise threshold, then natural heat dissipation can be used. When the coolant temperature value reaches the first temperature threshold and the temperature rise rate is not lower than the first temperature rise threshold, the controller outputs a liquid injection start signal, first controls the inlet solenoid valve or the inlet flow valve to open, and at the same time starts the inlet circulation pump, so that the coolant begins to be injected into the liquid cooling channel 2 to dissipate heat for the power cable 1. During this period, the first hydraulic pressure in the liquid cooling channel 2 is detected. If the first hydraulic pressure reaches the pressure threshold, it means that the coolant has filled the liquid cooling channel 2, and the outer wall of the liquid cooling channel 2 has been fully expanded. At this time, the controller controls the outlet solenoid valve or the outlet flow valve to open, and the outlet circulation pump can be selectively turned on at this time. When the temperature rise of the power cable 1 is fast, resulting in the increase rate of the coolant temperature value being higher than the second temperature rise rate, the outlet solenoid valve or the outlet flow valve can be opened before the coolant completely fills the liquid cooling channel 2, and the outlet circulation pump can be turned on to pump the heated coolant out of the liquid cooling channel 2 in advance to start the heat exchange cycle. At the same time, the switch cycle ratio of the outlet solenoid valve or the opening of the outlet flow valve is controlled to control the coolant in and out of the liquid cooling channel 2, so that the coolant is dynamically filled into the liquid cooling channel 2 to improve the heat exchange efficiency. When there are adjacent idle car charging gun lines in the charging pile, the liquid cooling channel 2 of the idle car charging gun line can also be opened to participate in auxiliary heat exchange and improve the heat exchange efficiency. When the outside temperature is low and the weather is cold, the coolant delivered in the liquid cooling channel 2 of the charging car charging gun line can preheat other idle car charging gun lines and their gun heads, so that other electric vehicle users will not easily get their hands frozen when taking the car charging gun lines, thereby improving the user experience. When the electric vehicle enters trickle charging, or the charging of the electric vehicle is completed, the heat generation of the power cable 1 is greatly reduced. At this time, the temperature of the coolant in the liquid cooling channel 2 begins to decrease. At this time, the controller first closes the inlet solenoid valve or the inlet flow valve and the inlet circulation pump to stop the input of the coolant, and extracts the coolant in the liquid cooling channel 2 through the outlet circulation pump. At the same time, the second hydraulic value of the liquid cooling channel 2 in the car charging gun line is obtained. When the second hydraulic value drops below the set low pressure threshold, that is, the liquid cooling channel 2 is completely contracted, the outlet solenoid valve or the outlet flow valve is closed, and the outlet flow pump is closed to keep the liquid cooling channel 2 relatively closed. At this time, the weight of the car charging gun line is reduced, which is convenient for electric car users to unplug and return the car charging gun line, thereby improving the user experience of electric car users, especially the user experience of female electric car users.

[0102] This embodiment also discloses a liquid-cooled super charging pile that is automatically allocated on demand, including:

[0103] A signal acquisition module is used to obtain a link signal between the gun head and the vehicle charging port;

[0104] The liquid injection start module is used to output a liquid injection start signal according to the link signal to perform liquid injection operation on the liquid cooling channel 2 in the vehicle charging gun line;

[0105] The temperature acquisition module is used to obtain the outlet coolant temperature of the liquid cooling channel 2 in the vehicle charging gun line;

[0106] A liquid injection stop module, used to output a liquid injection flow control signal or a liquid injection stop signal according to the outlet coolant temperature;

[0107] The coolant recovery module is used to obtain a disconnection signal or a charging completion signal indicating that the gun head is disconnected from the vehicle charging port, and output a recovery signal for controlling the recovery of the coolant in the liquid cooling channel 2 in the vehicle charging gun line based on the disconnection signal or the charging completion signal.

[0108] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A liquid cooling method with automatic on-demand allocation, characterized in that: include: Get the link signal between the gun head and the vehicle charging port; Output the injection start signal according to the link signal to inject liquid into the liquid cooling channel in the vehicle charging gun line; Get the outlet coolant temperature of the liquid cooling channel in the vehicle charging gun line; Output injection flow control signal or injection stop signal according to outlet coolant temperature; Obtain a disconnection signal or a charging completion signal when the gun tip is disconnected from the vehicle charging port; Outputting a recovery signal for controlling the coolant in the liquid cooling channel of the charging gun line of the recovery vehicle according to the disconnection signal or the charging completion signal; The step of outputting a liquid injection flow control signal or a liquid injection stop signal according to the outlet coolant temperature includes: When the temperature rise rate of the outlet coolant temperature is less than zero, an injection flow control signal or an injection stop signal is output; Use the following recycling steps: Output a cut-off signal for closing the inlet solenoid valve or the inlet flow valve and the inlet circulation pump; and obtaining a second hydraulic pressure value of a liquid cooling channel in the vehicle charging gun line; When the second hydraulic pressure value drops below the set low pressure threshold, a channel sealing signal is output to close the outlet solenoid valve or the outlet flow valve, and to close the outlet flow pump.

2. The automatic on-demand allocation liquid cooling method according to claim 1, characterized in that: After the liquid injection start signal is output according to the link signal and the liquid cooling channel in the vehicle charging gun line is injected with liquid, the method further includes: Outputting an inlet start signal of a solenoid valve for opening the inlet of a liquid cooling channel in a vehicle charging gun line according to the liquid injection start signal; Acquire a first hydraulic pressure signal in a liquid cooling channel in a vehicle charging gun line; When the first hydraulic pressure reaches the pressure threshold, an outlet start signal is outputted to open the outlet of the solenoid valve of the liquid cooling channel in the vehicle charging gun line.

3. The automatic on-demand allocation liquid cooling method according to claim 1, characterized in that: After obtaining the link signal between the charging head and the vehicle charging port, the method further includes: Get the coolant temperature value of the liquid cooling channel in the car charger line; When the coolant temperature reaches a first temperature threshold and the temperature rise rate is not lower than the first temperature rise threshold, an injection start signal is output.

4. The automatic on-demand allocation liquid cooling method according to claim 1, characterized in that: After the liquid injection start signal is output according to the link signal and the liquid cooling channel in the vehicle charging gun line is injected with liquid, the method further includes: Outputting an inlet start signal of a solenoid valve for opening the inlet of a liquid cooling channel in a vehicle charging gun line according to the liquid injection start signal; The temperature rise rate of the coolant in the liquid cooling channel is obtained. When the temperature rise rate of the coolant is higher than the second temperature rise rate, an outlet start signal for opening the solenoid valve at the outlet of the liquid cooling channel in the vehicle charging gun line is intermittently output, or an outlet start signal for adjusting the opening of the outlet flow valve of the liquid cooling channel in the vehicle charging gun line is output.

5. The automatic on-demand allocation liquid cooling method according to claim 4, characterized in that: The switching cycle ratio of the outlet start signal of the intermittent output for opening the outlet of the liquid cooling channel in the vehicle charging gun line is positively correlated with the coolant temperature of the liquid cooling channel in the vehicle charging gun line, and the flow valve opening of the outlet start signal output for adjusting the opening of the flow valve at the outlet of the liquid cooling channel in the vehicle charging gun line is positively correlated with the coolant temperature of the liquid cooling channel in the vehicle charging gun line.

6. The automatic on-demand allocation liquid cooling method according to claim 1, characterized in that: After the liquid injection start signal is output according to the link signal, the method further comprises: Get external ambient temperature information; If the external ambient temperature is lower than the set temperature threshold, a cooling compensation signal is output to open the liquid cooling channel of other car charging gun lines connected to the liquid cooling channel of the current car charging gun line, and the coolant temperature of other liquid cooling channels is monitored; If the coolant temperature of other liquid cooling channels is higher than the set warning value, an external adjustment signal for reducing the circulation flow or flow rate with other liquid cooling channels is output, or an external closing signal for closing the circulation with other liquid cooling channels is output.

7. An automatic on-demand allocation of liquid-cooled super charging pile, characterized in that: include: A signal acquisition module is used to obtain a link signal between the gun head and the vehicle charging port; The liquid injection start module is used to output a liquid injection start signal according to the link signal to perform liquid injection operation on the liquid cooling channel in the vehicle charging gun line; The temperature acquisition module is used to obtain the outlet coolant temperature of the liquid cooling channel in the vehicle charging gun line; A liquid injection stop module, used to output a liquid injection flow control signal or a liquid injection stop signal according to the outlet coolant temperature; A coolant recovery module is used to obtain a disconnection signal or a charging completion signal when the gun head is disconnected from the vehicle charging port, and output a recovery signal for controlling the recovery of the coolant in the liquid cooling channel in the vehicle charging gun line according to the disconnection signal or the charging completion signal; The step of outputting a liquid injection flow control signal or a liquid injection stop signal according to the outlet coolant temperature includes: When the temperature rise rate of the outlet coolant temperature is less than zero, an injection flow control signal or an injection stop signal is output; Use the following recycling steps: Output a cut-off signal for closing the inlet solenoid valve or the inlet flow valve and the inlet circulation pump; and obtaining a second hydraulic pressure value of a liquid cooling channel in the vehicle charging gun line; When the second hydraulic pressure value drops below the set low pressure threshold, a channel sealing signal is output to close the outlet solenoid valve or the outlet flow valve, and to close the outlet flow pump.

8. An intelligent terminal, characterized in that: The invention comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes the liquid cooling method for automatic on-demand allocation as claimed in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The invention stores a computer program which can be loaded by a processor and executes the liquid cooling method for automatic on-demand allocation as claimed in any one of claims 1 to 7.

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