Self-adaptive control method of liquid cooling system and charging pile

Abstract

The invention relates to the technical field of liquid cooling, and particularly provides a self-adaptive control method of a liquid cooling system and a charging pile, and the method comprises the steps: setting the target output power of the liquid cooling system which comprises a fan and a water pump; determining the maximum rotating speed of the fan and the maximum rotating speed of the water pump according to the target output power of the liquid cooling system, and starting the liquid cooling system; the current output power of the liquid cooling system is obtained after the liquid cooling system runs, and when the current output power of the liquid cooling system is smaller than the target output power, whether equipment where the liquid cooling system is located meets the heat dissipation requirement or not is judged; and if the equipment does not meet the heat dissipation requirement, the rotating speed of the fan, the rotating speed of the water pump and the target output power of the liquid cooling system are increased according to the priority sequence, and the equipment is subjected to current reduction treatment until the equipment meets the heat dissipation requirement. Therefore, adaptive control of the liquid cooling system can be achieved, control is achieved according to the priority sequence, and the power adaptive capacity of the liquid cooling system is high.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling control, and in particular to an adaptive control method of a liquid cooling system and a charging pile. Background Art

[0002] More and more manufacturers have started to develop and design liquid cooling equipment. However, due to the large current span and complex operating conditions of high-power liquid cooling equipment during operation, even if the current is the same, the liquid cooling system needs to adjust the power due to different environments to start the appropriate working power.

[0003] If the liquid cooling system does not adopt a reasonable control scheme, a low current condition will occur, causing the liquid cooling system to overwork; a high current condition will cause the liquid cooling system to be underpowered, causing the equipment to overheat and melt, leading to serious accidents.

[0004] Therefore, the adaptability of the liquid cooling system is one of the most important aspects in the design of the liquid cooling system. Summary of the invention

[0005] In order to solve one of the above technical problems, the present invention proposes the following technical solution.

[0006] The first aspect of the present invention proposes an adaptive control method for a liquid cooling system, comprising the following steps: setting a target output power of the liquid cooling system, wherein the liquid cooling system includes a fan and a water pump; determining the maximum speed of the fan and the maximum speed of the water pump according to the target output power of the liquid cooling system, and starting the liquid cooling system; obtaining the current output power of the liquid cooling system after the liquid cooling system is running, and when the current output power of the liquid cooling system is less than the target output power, determining whether the device where the liquid cooling system is located meets the heat dissipation requirements; if the device does not meet the heat dissipation requirements, increasing the fan speed, the water pump speed, the target output power of the liquid cooling system in order of priority, and performing flow reduction processing on the device until the device meets the heat dissipation requirements, wherein the fan speed is less than or equal to its maximum speed, and the water pump speed is less than or equal to its maximum speed.

[0007] In addition, the adaptive control method of the liquid cooling system according to the above embodiment of the present invention may also have the following additional technical features.

[0008] According to one embodiment of the present invention, setting the target output power of the liquid cooling system includes: obtaining the current ambient temperature and the current output current of the equipment where the liquid cooling system is located, and determining the temperature level where the current ambient temperature is located and the current level where the current output current is located; setting the target output power of the liquid cooling system according to the temperature level and the current level.

[0009] According to one embodiment of the present invention, determining whether the equipment where the liquid cooling system is located meets the heat dissipation requirements includes: reading the temperature and calibrated limit temperature of each heat dissipation object of the liquid cooling system; if the temperatures of all heat dissipation objects do not exceed their calibrated limit temperatures, determining that the equipment where the liquid cooling system is located meets the heat dissipation requirements and maintaining the current output power of the liquid cooling system; if there is at least one heat dissipation object whose temperature exceeds its calibrated limit temperature, determining that the equipment where the liquid cooling system is located does not meet the heat dissipation requirements.

[0010] According to an embodiment of the present invention, the priority order is: increasing the rotation speed of the fan, increasing the rotation speed of the water pump, increasing the target output power of the liquid cooling system, and performing flow reduction processing on the device.

[0011] According to one embodiment of the present invention, the fan speed, the water pump speed, the target output power of the liquid cooling system are increased in order of priority, and the device is subjected to a flow reduction process, including: obtaining the current speed of the fan, if the current speed of the fan is less than its maximum speed, gradually increasing the fan speed and judging whether the device meets the heat dissipation requirement until the current speed of the fan reaches its maximum speed; if the device still does not meet the heat dissipation requirement when the current speed of the fan reaches its maximum speed, obtaining the current speed of the water pump, if the current speed of the water pump is less than its maximum speed, gradually increasing the water pump speed and judging whether the device meets the heat dissipation requirement until the current speed of the water pump reaches its maximum speed; if the device still does not meet the heat dissipation requirement when the current speed of the water pump reaches its maximum speed, increasing the target output power of the liquid cooling system, and returning to step S2 until the target output power rises to the maximum output power of the liquid cooling system, judging whether the device meets the heat dissipation requirement; if the device still does not meet the heat dissipation requirement when the target output power of the liquid cooling system rises to the maximum output power, performing a flow reduction process on the device.

[0012] According to one embodiment of the present invention, the fan speed, the water pump speed, the target output power of the liquid cooling system are increased in order of priority, and the device is subjected to flow reduction processing, and also includes: when the current speed of the water pump has not reached its maximum speed, determining whether the pressure feedback from the pressure sensor of the liquid cooling circuit reaches a threshold value, and if so, executing the step of increasing the target output power of the liquid cooling system; if not, returning to the step of gradually increasing the water pump speed and determining whether the device meets the heat dissipation requirements.

[0013] According to one embodiment of the present invention, performing a current reduction process on the device includes: performing a current reduction process on a heat dissipation object in the device whose temperature exceeds its calibrated limit temperature.

[0014] According to an embodiment of the present invention, the device is a charging pile, and the heat dissipation object includes a charging gun.

[0015] According to one embodiment of the present invention, the maximum speed of the fan is 50% P of the fan power. 目标 The maximum speed of the water pump is 50% of the power of the water pump. 目标 The speed under which P 目标 is the target output power of the liquid cooling system.

[0016] A second aspect of the present invention provides a charging pile, including a liquid cooling system that executes the adaptive control method of the liquid cooling system provided in the above embodiment.

[0017] The technical solution of the embodiment of the present invention first sets the target output power of the liquid cooling system, and increases the speed of the fan, the speed of the water pump, the target output power of the liquid cooling system and performs flow reduction processing according to the target output power and in the order of priority, thereby realizing power adaptive control of the liquid cooling system. Thus, adaptive control of the liquid cooling system can be realized, and control is realized according to the order of priority, and the power adaptive capability of the liquid cooling system is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Flow chart of an adaptive control method for a liquid cooling system according to an embodiment of the present invention.

[0019] Figure 2 This is an electrical system diagram of a dual-gun liquid cooling system for a charging pile according to a specific example of the present invention.

[0020] Figure 3 This is a flow chart of the adaptive control of a liquid cooling system for a dual-gun charging pile, which is a specific example of the present invention.

[0021] Figure 4 It is a structural block diagram of a charging pile according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The adaptive control method of the liquid cooling system of the embodiment of the present invention is executed by the liquid cooling system and can be applied to the equipment where the liquid cooling system is located, such as charging equipment such as charging piles.

[0024] Figure 1 Flow chart of an adaptive control method for a liquid cooling system according to an embodiment of the present invention.

[0025] like Figure 1 As shown, the adaptive control method of the liquid cooling system includes the following steps S1 to S4.

[0026] S1, setting a target output power of a liquid cooling system, wherein the liquid cooling system includes a fan and a water pump.

[0027] Specifically, when the device is running, the heat is dissipated by a liquid cooling system including a fan and a water pump. When the power of the liquid cooling system needs to be adaptively controlled, the target output power P of the liquid cooling system of the device is first set according to the operating conditions (such as ambient temperature and other operating parameters) and operating requirements (such as output current and other operating parameters) of the liquid cooling system. 目标 .

[0028] S2, determining the maximum speed of the fan and the maximum speed of the water pump according to the target output power of the liquid cooling system, and starting the liquid cooling system.

[0029] Among them, the maximum speed of the fan is 50% of the fan power P 目标 The maximum speed of the water pump is 50% of the power of the water pump. 目标 The speed under which P 目标 is the target output power of the liquid cooling system.

[0030] Specifically, the liquid cooling system will 50% P 目标 Power is gradually allocated to the fan, 50% P 目标 Power is gradually distributed to the water pump. At this time, 50% P 目标 The maximum speed of the fan Anmax and the maximum speed of the water pump Bnmax under the power condition are as follows. Specifically, the fan and the water pump are started gradually, and the 50% P is achieved by gradually increasing the speed of the fan and the water pump. 目标 When the liquid cooling system is running, the current fan speed An, the current pump speed Bn and the current output power Pn of the liquid cooling system are fed back in real time.

[0031] S3, after the liquid cooling system is running, obtaining the current output power of the liquid cooling system, and when the current output power of the liquid cooling system is less than the target output power, determining whether the device where the liquid cooling system is located meets the heat dissipation demand.

[0032] Among them, the current output power of the liquid cooling system can be obtained after it runs for a preset time. The preset time can be set in advance according to the actual needs of the equipment, for example, it can be about 30 seconds.

[0033] S4: If the device does not meet the heat dissipation requirement, the fan speed, water pump speed, target output power of the liquid cooling system are increased in order of priority, and the device is derated until the device meets the heat dissipation requirement, wherein the fan speed is less than or equal to its maximum speed, and the water pump speed is less than or equal to its maximum speed.

[0034] Specifically, after the liquid cooling system runs for a preset time, such as 30 seconds, the current output power Pn of the liquid cooling system is obtained, and the current output power Pn of the liquid cooling system is compared with the target output power Pn. 目标 Size relationship.

[0035] If P 目标 > Pn, it is determined whether the device where the liquid cooling system is located meets the heat dissipation requirements. If not, the fan speed is increased, the water pump speed is increased, the target output power of the liquid cooling system is increased, and the flow reduction process is performed in accordance with the priority order (order of precedence), wherein the priority order is: increase the fan speed > increase the water pump speed > increase the target output power of the liquid cooling system and return to step S2 > flow reduction process. During the control process, it is determined in real time whether the device meets the heat dissipation requirements. If yes, the process is terminated and the control is stopped; if not, the next priority control is performed.

[0036] That is, when the equipment does not meet the heat dissipation requirements, only the fan speed is increased, the fan speed is increased first and then the water pump speed is increased, the fan speed is increased first and then the water pump speed is increased, and finally the target output power is increased and the process returns to step S2, or the fan speed is increased first and then the water pump speed is increased and then the target output power is increased and the process returns to step S2 and finally the flow reduction process is performed.

[0037] When the speed of the fan and the water pump is increased, it is achieved by increasing the duty cycle of the speed control, and is limited by the respective maximum speeds Anmax and Bnmax determined in step S2; when the target output power P of the liquid cooling system is increased, 目标 When the cooling system is used, it is limited by the maximum output power Pnmax of the liquid cooling system, which is set in advance according to the heat dissipation requirements of the equipment.

[0038] The adaptive control method of the liquid cooling system of the embodiment of the present invention first sets the target output power of the liquid cooling system, and increases the speed of the fan, the speed of the water pump, the target output power of the liquid cooling system and performs flow reduction processing according to the target output power and in the order of priority, thereby realizing adaptive power control of the liquid cooling system. Thus, adaptive control of the liquid cooling system can be realized, and control is realized according to the order of priority, and the power adaptive capability of the liquid cooling system is strong.

[0039] In one embodiment, step S1 may include: obtaining the current ambient temperature and current output current of the device where the liquid cooling system is located, and determining the temperature level at which the current ambient temperature is located and the current level at which the current output current is located; and setting the target output power of the liquid cooling system according to the temperature level and the current level.

[0040] Specifically, first, the output current of the device is divided into multiple current gears, and the ambient temperature of the device is divided into multiple temperature gears, and each temperature gear corresponds to each current gear. Each corresponding relationship between the ambient temperature and the output current gear corresponds to a target output power, which can be set according to the working conditions and specific operating requirements. Then, the gears where the current ambient temperature and the current output current of the device are respectively located are determined, and then a target output power is correspondingly calculated according to the corresponding relationship between the two gears, which is the target output power of the liquid cooling system.

[0041] For example, when the current ambient temperature of the device is less than 0°C and the current output current is 250 less than the current output current less than 400, the target output power of the liquid cooling system is 1.75KW.

[0042] Therefore, the data collection capability is strong, there is a basic power definition for each working condition, and the data can be saved and modified later, so that the heat dissipation power release of the liquid cooling system can be as close to the current output power as possible.

[0043] In one embodiment, determining whether the device where the liquid cooling system is located meets the heat dissipation requirements in step S3 may include: reading the temperature and calibrated limit temperature of each heat dissipation object in the liquid cooling system; if the temperatures of all heat dissipation objects do not exceed their calibrated limit temperatures, then determining that the device where the liquid cooling system is located meets the heat dissipation requirements and maintaining the current output power of the liquid cooling system; if there is at least one heat dissipation object whose temperature exceeds its calibrated limit temperature, then determining that the device where the liquid cooling system is located does not meet the heat dissipation requirements.

[0044] The calibrated limit temperature refers to a pre-set temperature threshold when the heat dissipation object is running. Each heat dissipation object has a calibrated limit temperature.

[0045] When the device is a charging pile, the heat dissipation object is the charging gun, and the calibrated limit temperature of the charging gun can be 80°C.

[0046] Specifically, when the equipment and its liquid cooling system are running, the current temperature of each heat dissipation object can be obtained in real time. If the temperatures of all heat dissipation objects do not exceed their calibrated limit temperatures, it means that the heat dissipation demand is met at this time and there is no need to adjust the heat dissipation power, so the current output power of the liquid cooling system is maintained; if there is a heat dissipation object whose temperature exceeds its calibrated limit temperature, it means that the heat dissipation demand is not met at this time and the heat dissipation power needs to be adjusted, that is, step S4 is executed.

[0047] In one embodiment, the priority order is: increasing the speed of the fan, increasing the speed of the water pump, increasing the target output power of the liquid cooling system, and reducing the flow of the device.

[0048] Further, step S4 may include: obtaining the current speed of the fan, if the current speed of the fan is less than its maximum speed, gradually increasing the speed of the fan and judging whether the device meets the heat dissipation requirement until the current speed of the fan reaches its maximum speed; if the device still does not meet the heat dissipation requirement when the current speed of the fan reaches its maximum speed, obtaining the current speed of the water pump, if the current speed of the water pump is less than its maximum speed, gradually increasing the speed of the water pump and judging whether the device meets the heat dissipation requirement until the current speed of the water pump reaches its maximum speed; if the device still does not meet the heat dissipation requirement when the current speed of the water pump reaches its maximum speed, increasing the target output power of the liquid cooling system, and returning to step S2 until the target output power rises to the maximum output power of the liquid cooling system, judging whether the device meets the heat dissipation requirement; if the device still does not meet the heat dissipation requirement when the target output power of the liquid cooling system rises to the maximum output power, performing flow reduction processing on the device.

[0049] Specifically, when the current device does not meet the heat dissipation requirements, the current speed of the fan is first obtained, and it is determined whether the current speed of the fan is less than 50% P 目标 The maximum speed of the fan under the power condition is Anmax. If it is, the duty cycle of controlling the fan speed is gradually increased by 10% to increase the fan speed. After each increase, it is determined whether the device meets the heat dissipation requirements. If it is, the current speed is maintained; if not, the fan speed is continuously increased. When the current speed of the fan reaches its maximum speed Anmax, if the device still does not meet the heat dissipation requirements, the speed of the water pump is gradually increased, and it is ensured that the speed of the water pump does not exceed its maximum speed. After each increase, it is determined whether the device meets the heat dissipation requirements. If it is, the current speed is maintained; if not, the speed of the water pump is continuously increased. When the current speed of the water pump reaches its maximum speed Bnmax, if the device still does not meet the heat dissipation requirements, the P 目标 The power is increased by 0.25KW, and the total power rises and then returns to step S2, that is, 50% P 目标 Power is gradually allocated to the fan, 50% P 目标 The power is gradually distributed to the water pump, and the above cycle continues. 目标 When the power continues to rise to the maximum power Pnmax of the liquid cooling system and still cannot meet the heat dissipation requirements of the system, the current output of the device is reduced and noise reduction is achieved through current reduction processing.

[0050] Therefore, the system has strong adaptability. When the current power of the liquid cooling system cannot meet the requirements, the fan speed is increased first, and then the water pump speed is increased, so that the power distribution is more suitable. When the power table does not meet the heat dissipation requirements, the system can increase the total power of the liquid cooling system to give priority to ensuring the heat dissipation capacity of the system. If the maximum power of the liquid cooling system is reached and the cooling conditions are still not met, the current will be reduced according to the current conditions of each heat dissipation object.

[0051] Furthermore, step S4 may also include: when the current speed of the water pump has not reached its maximum speed, determining whether the pressure feedback from the pressure sensor of the liquid cooling circuit reaches a threshold value; if so, executing the step of increasing the target output power of the liquid cooling system; if not, returning to the step of gradually increasing the speed of the water pump and determining whether the equipment meets the heat dissipation requirements.

[0052] Specifically, after increasing the speed of the water pump, if the current speed of the water pump does not reach the maximum speed of the water pump, it is determined whether the pressure feedback from the liquid cooling circuit pressure sensor reaches the threshold. If the threshold is reached, it means that the speed of the water pump cannot be further increased, so the target output power of the liquid cooling system is increased; if the threshold is not reached, the speed of the water pump continues to be increased, that is, returning to the step of gradually increasing the speed of the water pump and determining whether the equipment meets the heat dissipation requirements.

[0053] Therefore, when increasing the rotation speed of the water pump, the pressure of the liquid cooling system is taken into consideration to ensure the safe operation of the liquid cooling system.

[0054] In one embodiment, the step S4 of reducing the flow of the device may include: reducing the flow of the heat dissipation object in the device whose temperature exceeds its calibrated limit temperature.

[0055] The device may be a charging pile, and the heat dissipation object may include a charging gun.

[0056] Specifically, when the target output power of the liquid cooling system reaches the maximum output power, if the charging pile still does not meet the heat dissipation requirements, the temperatures of all charging gun tips of the charging pile are collected. For charging guns whose temperatures exceed the calibrated limit temperature of the charging gun, the current can be reduced by about 10%, and the temperature is fed back in real time until the temperatures of all gun tips reach below their calibrated limit temperature.

[0057] Combine the following Figure 2 and Figure 3 The dual-gun liquid cooling system of a charging pile is taken as an example to illustrate the liquid cooling system and the adaptive control method thereof according to an embodiment of the present invention.

[0058] Figure 2 This is an electrical system diagram of a dual-gun liquid cooling system for a charging pile according to a specific example of the present invention.

[0059] like Figure 2As shown, the liquid cooling system includes a gun tip temperature sensor, an ambient temperature sensor, a fan, a water pump, a coolant pot, a cold source control board, and a CCU (Charging Control Unit) control board. The gun tip temperature sensor and the ambient temperature sensor are connected to the CCU control board respectively, and the CCU control board is also connected to the cold source control board. The cold source control board controls the speed of the fan and the water pump respectively. The fan is connected to each gun tip of the charging pile respectively, and the water pump is also connected to each gun tip of the charging pile respectively. The coolant pot is connected to the fan and the water pump respectively.

[0060] Among them, the gun tip temperature sensor is installed inside the gun tip of the charging pile to monitor and transmit back the temperature of the gun tip of the charging gun. An electric energy meter is provided on the shunt of the main circuit to monitor and return the current of the liquid-cooled charging gun. A coolant pot is provided at the lower end of the cold return liquid port to store the coolant. There is a fan on the heat dissipation flat body through which the hot return liquid passes. The low-temperature coolant in the coolant pot is pushed into the charging cable through a water pump. The high-temperature coolant in the charging cable returns from the charging cable into the cooling flat body. Water pump: a flow booster device for the coolant. CCU control board: as the core main control board of the liquid cooling terminal, it interacts with the cold source control board.

[0061] The adaptive control method of the liquid cooling system of the embodiment of the present invention, when applied to the charging pile dual-gun liquid cooling system, can be executed by the CCU control board.

[0062] The first stage: the output current C of the charging pile is divided into four levels: 250A, 400A, 500A, and 800A; the ambient temperature T n It is divided into four gears: less than 0℃, 0~20℃, 20~40℃, and 40℃ and above. The following table 1 shows the target output power setting (P 11 Refers to the target output power corresponding to the first current gear and the first temperature gear):

[0063] Table 1 Target output power setting

[0064] <![CDATA[T n <0℃]]> <![CDATA[0<T n <20℃]]> <![CDATA[20<T n <40℃]]> <![CDATA[40<T n ]]> 0＜C＜250 <![CDATA[1.25KW(P 11 )]]> <![CDATA[1.5KW(P 12 )]]> <![CDATA[1.75KW(P 13 )]]> <![CDATA[2.0KW(P 14 )]]> 250＜C＜400 <![CDATA[1.75KW(P 21 )]]> <![CDATA[2.0KW(P 22 )]]> <![CDATA[2.25KW(P 23 )]]> <![CDATA[2.5KW(P 24 )]]> 400＜C＜500 <![CDATA[2.25KW(P 31 )]]> <![CDATA[2.5KW(P 32 )]]> <![CDATA[2.75KW(P 33 )]]> <![CDATA[3.0KW(P 34 )]]> 500＜C＜800 <![CDATA[2.75KW(P 41 )]]> <![CDATA[3.0KW(P 42 )]]> <![CDATA[3.25KW(P 43 )]]> <![CDATA[3.5KW(P 44 )]]>

[0065] The second stage. Figure 3 As shown in the figure, when the charging pile enters the power transmission stage, the CCU control board gives a target power P of the liquid cooling system based on the current ambient temperature and the current output current of the liquid cooling charging gun according to the above table. 目标 For example, when the ambient temperature is less than 0°C, 250<current output current<400, the target output power of the liquid cooling system is P 21 =1.75KW.

[0066] It should be noted that the above table can be dynamically modified and saved according to actual needs, so that the adaptability of the target output power is further enhanced.

[0067] After that, the CCU control board, through RS485 communication, the interactive cold source control board will transfer 50% P 目标 The power is gradually distributed to the fan (specifically by gradually increasing the speed), 50% P 目标 The power is gradually distributed to the water pump (specifically by gradually increasing the speed), 50% P each 目标 The power corresponds to the maximum speed Anmax and Bnmax of the fan and water pump respectively.

[0068] Then the fan and the water pump are started gradually, and the liquid cooling system provides real-time feedback of the current fan speed An, the current water pump speed Bn and the current output power Pn of the liquid cooling system.

[0069] Reference Figure 3 , after 30 seconds, compare the current output power Pn with the target output power P 目标 Size relationship.

[0070] If P 目标 >Pn, the CCU reads the temperature T1 of the left gun tip of the charging pile and the calibrated limit temperature value T1"=80℃ of the left gun, and the CCU reads the temperature T2 of the right gun tip and the calibrated limit temperature value T2"=80℃ of the right gun.

[0071] If the temperature of neither of the two guns exceeds the corresponding calibrated limit temperature, the liquid cooling system continues to maintain the current output power Pn. This design is to achieve energy saving of the cooling source as much as possible while ensuring the temperature rise of the gun head.

[0072] If the temperature T1 or T2 of any gun exceeds the corresponding calibrated limit temperature, the CCU reads the current speed An of the fan and 50% P allocated to the fan by the liquid cooling system again. 目标 The maximum fan speed Anmax under power conditions.

[0073] If An<Anmax, the liquid cooling system increases the fan speed by 10% through the CCU to control the duty cycle; if the temperature of all guns cannot drop to 80℃ required by the calibrated limit temperature T1" and T2", the fan speed will continue to increase until the fan power reaches 50%P allocated to the fan. 目标 power.

[0074] If the temperature of the two guns still cannot be kept below the calibrated limit temperature, start preparing to increase the speed of the liquid cooling system water pump until the speed of the water pump reaches 50% of the P allocated to the water pump. 目标 Maximum speed Bnmax at power.

[0075] When increasing the water pump speed, it is necessary to consider whether the pressure feedback from the pressure sensor of the liquid cooling circuit reaches the threshold. If so, it is considered that the water pump has reached its maximum speed; if not, continue to increase the water pump speed.

[0076] If in P 目标 If the temperature of both guns cannot drop to the calibrated limit temperature of 80°C when the pump speed reaches its maximum speed or the pressure reaches the threshold, then P 目标 Is it less than Pnmax?

[0077] If P 目标 <Pnmax, then P 目标 Increase by 0.25KW, and the total power will increase by 50%P 目标 Power is gradually allocated to the fan, 50% P 目标 Power is gradually distributed to the water pump, and the above cycle continues.

[0078] If P 目标 When it rises to the maximum output power Pnmax of the liquid cooling system, it still cannot meet the heat dissipation requirements of the system, which proves that the total power of the cold source is insufficient. Compare and detect the feedback temperature of the left gun T1 and the right gun T2. ​​If it is higher than 80℃, the current of the corresponding gun will be reduced by 10%, and temperature feedback will be performed after 30S.

[0079] In summary, the adaptive control method of the liquid cooling system of the embodiment of the present invention has strong data collection capability, has basic power definition for each working condition, and can save data and modify the power table later, so that the heat dissipation power release of the liquid cooling system can be as close to the current output power as possible; it has strong adaptability, and when the current power cannot be met, it gives priority to increasing the fan speed, and then increasing the water pump speed, so that the power distribution fit is stronger; when the power table does not meet the heat dissipation demand, the system can increase the total power of the liquid cooling system, give priority to ensuring the heat dissipation capacity of the system, and if the maximum power of the liquid cooling system is reached and the cooling conditions are still not met, the current is reduced according to the current conditions of each gun; the power of the liquid cooling system is subdivided, which can improve the energy utilization efficiency of the entire charging system and is also beneficial to extending the service life of the cold source.

[0080] Corresponding to the adaptive control method of the liquid cooling system of the above embodiment, the present invention also proposes a charging pile.

[0081] Figure 4 It is a structural block diagram of a charging pile according to an embodiment of the present invention.

[0082] like Figure 4 As shown, the charging pile includes a liquid cooling system, and the liquid cooling system is used to execute the adaptive control method of the liquid cooling system proposed in the above embodiment of the present invention.

[0083] It should be noted that the specific implementation of the charging pile can refer to the specific implementation of the adaptive control method of the liquid cooling system mentioned above. To avoid redundancy, it will not be described in detail here.

[0084] The charging pile of the embodiment of the present invention can realize adaptive control of the liquid cooling system through its liquid cooling system, and realize control according to the priority order, and its liquid cooling system has strong power adaptive capability.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limitations on the present invention, and those of ordinary skill in the art can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An adaptive control method for a liquid cooling system, characterized in that: The following steps are involved: Setting a target output power of a liquid cooling system, wherein the liquid cooling system includes a fan and a water pump; Determining the maximum rotation speed of the fan and the maximum rotation speed of the water pump according to the target output power of the liquid cooling system, and starting the liquid cooling system; After the liquid cooling system is running, obtaining the current output power of the liquid cooling system, and when the current output power of the liquid cooling system is less than the target output power, determining whether the device where the liquid cooling system is located meets the heat dissipation requirement; If the device does not meet the heat dissipation requirements, the fan speed, the water pump speed, the target output power of the liquid cooling system are increased in order of priority, and the device is subjected to current reduction processing until the device meets the heat dissipation requirements, wherein the fan speed is less than or equal to its maximum speed, and the water pump speed is less than or equal to its maximum speed.

2. The adaptive control method of the liquid cooling system according to claim 1, characterized in that: Set the target output power of the liquid cooling system, including: Obtain the current ambient temperature and current output current of the device where the liquid cooling system is located, and determine the temperature level of the current ambient temperature and the current level of the current output current; The target output power of the liquid cooling system is set according to the temperature level and the current level.

3. The adaptive control method of the liquid cooling system according to claim 1, characterized in that: Determining whether the device where the liquid cooling system is located meets the heat dissipation requirements includes: Reading the temperature and calibrated limit temperature of each heat dissipation object of the liquid cooling system; If the temperature of all heat dissipation objects does not exceed their calibrated limit temperature, it is determined that the device where the liquid cooling system is located meets the heat dissipation requirements and maintains the current output power of the liquid cooling system; If the temperature of at least one heat dissipation object exceeds its calibrated limit temperature, it is determined that the device where the liquid cooling system is located does not meet the heat dissipation requirements.

4. The adaptive control method of the liquid cooling system according to claim 1, characterized in that: The priority order is: increasing the rotation speed of the fan, increasing the rotation speed of the water pump, increasing the target output power of the liquid cooling system, and performing flow reduction processing on the equipment.

5. The adaptive control method of the liquid cooling system according to claim 4, characterized in that: Increasing the speed of the fan, the speed of the water pump, the target output power of the liquid cooling system and reducing the flow of the device in order of priority, including: Obtaining a current speed of the fan, and if the current speed of the fan is less than its maximum speed, gradually increasing the speed of the fan and determining whether the device meets the heat dissipation requirement until the current speed of the fan reaches its maximum speed; If the device still does not meet the heat dissipation requirement when the current speed of the fan reaches its maximum speed, the current speed of the water pump is obtained; if the current speed of the water pump is less than its maximum speed, the speed of the water pump is gradually increased to determine whether the device meets the heat dissipation requirement until the current speed of the water pump reaches its maximum speed; If the device still does not meet the heat dissipation requirement when the current speed of the water pump reaches its maximum speed, the target output power of the liquid cooling system is increased, and the process returns to step S2 until the target output power rises to the maximum output power of the liquid cooling system, and then it is determined whether the device meets the heat dissipation requirement; If the device still fails to meet the heat dissipation requirement when the target output power of the liquid cooling system rises to the maximum output power, the device is subjected to a power reduction process.

6. The adaptive control method of the liquid cooling system according to claim 5, characterized in that: Increasing the speed of the fan, the speed of the water pump, the target output power of the liquid cooling system according to the priority order and performing a flow reduction process on the device, further comprising: When the current speed of the water pump has not reached its maximum speed, determine whether the pressure feedback from the pressure sensor of the liquid cooling circuit reaches the threshold. If so, execute the step of increasing the target output power of the liquid cooling system; if not, return to the step of gradually increasing the speed of the water pump and determining whether the device meets the heat dissipation requirements.

7. The adaptive control method of the liquid cooling system according to claim 1, characterized in that: The device is subjected to a flow reduction process, comprising: The heat dissipation object in the device whose temperature exceeds its calibrated limit temperature is subjected to a current reduction process.

8. The adaptive control method of a liquid cooling system according to claim 3 or 7, characterized in that: The device is a charging pile, and the heat dissipation object includes a charging gun.

9. The adaptive control method of a liquid cooling system according to claim 1, characterized in that: The maximum speed of the fan is 50% of the fan power P 目标 The maximum speed of the water pump is 50% of the power of the water pump. 目标 The speed under which P 目标 is the target output power of the liquid cooling system.

10. A charging pile, characterized in that: A liquid cooling system comprising the method for adaptively controlling a liquid cooling system according to claims 1-9.

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