A liquid cooling and thermal management system for a solar storage and charging inspection station

Abstract

A liquid cooling thermal management method and system, applied to a photovoltaic, storage, charging, and inspection module, includes the following steps: obtaining the operating status of the battery cluster; if the battery cluster is detected to be in standby mode, controlling the condensing fan and natural cooling condenser to cool the photovoltaic, storage, charging, and inspection module; if the battery cluster is detected to be in operating mode, controlling the condensing fan, condenser, and compressor to cool the photovoltaic, storage, charging, and inspection module. The liquid cooling thermal management method and system provided by this invention determines whether the compressor in the liquid cooling device needs to be activated based on the different operating states of the battery cluster, thereby precisely controlling the temperature, reducing unnecessary cooling, and lowering system heat loss.

Description

[0001] This case is a divisional application based on the invention patent with application date of 2023-09-26, application number 202311248535.6, and name “A liquid cooling thermal management method and system” as the parent case. Technical Field

[0002] The present invention relates to the field of liquid cooling, and in particular to a liquid cooling thermal management method and system. Background Art

[0003] With the promotion and application of new energy sources such as solar energy and wind energy, energy storage technology has also developed rapidly. Lithium batteries have gradually become the mainstream product of energy storage due to their relatively high energy, long service life, high rated voltage, high power tolerance, very low self-discharge rate, light weight, green environmental protection and almost no water consumption in production.

[0004] Currently, air cooling and liquid cooling are the main cooling methods for integrating photovoltaic storage and charging inspection systems. Air cooling has low cost, controllable cell temperature during the cooling process, and convenient operation and maintenance, making it the main cooling method. However, air cooling has high power consumption and occupies a large area. Especially for photovoltaic storage and charging inspection systems, if the battery cluster, DCDC, and PCS are all air-cooled, the system integration will be low and the system heat dissipation power consumption will be high. Liquid cooling has the advantages of high energy density, low system energy consumption, and low noise, and has gradually developed into a cooling method that can replace air cooling. However, the current liquid cooling thermal management strategy adapted to photovoltaic storage and charging inspection systems cannot accurately control temperature, resulting in a large amount of unnecessary cooling during the working process, increasing system power consumption. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a liquid cooling thermal management method and system to achieve precise temperature control and reduce system heat loss.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A liquid cooling thermal management method, applied to an optical storage charging and testing module, comprises the following steps:

[0008] S1. Obtain the operating status of the battery cluster;

[0009] S2. If it is detected that the current battery cluster is in the standby state, then go to step S3; if it is detected that the battery cluster is in the working state, then go to step S4;

[0010] S3, controlling the condensing fan and the natural cooling condenser to cool the solar storage charging and testing module;

[0011] S4. Control the condensing fan, condenser and compressor to cool the solar storage charging and testing module.

[0012] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0013] A liquid cooling thermal management system implements a liquid cooling thermal management method, including a light storage charging and testing module, a natural cooling module, a compressor module and a liquid cooling pipeline;

[0014] The natural cooling module includes a natural cooling condenser and a condensing fan, the condensing fan dissipates heat from the natural cooling condenser, and the natural cooling condenser is connected to the solar storage, charging and detection module through a pipeline;

[0015] The compressor module includes a compressor, a condenser, an expansion valve and a heat exchanger which are connected in sequence through a liquid cooling pipe, and the optical storage, charging and detection module performs heat exchange through the heat exchanger.

[0016] The beneficial effects of the present invention are: providing a liquid cooling thermal management method and system, which determines whether the compressor in the liquid cooling device needs to be started according to the different operating states of the battery cluster, thereby accurately controlling the temperature, reducing unnecessary cooling, and reducing system heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a liquid cooling thermal management method according to an embodiment of the present invention;

[0018] Figure 2 A specific flow chart of a battery cluster in a standby state according to a liquid cooling thermal management method according to an embodiment of the present invention;

[0019] Figure 3 A specific flow chart of a battery cluster in a working state according to a liquid cooling thermal management method according to an embodiment of the present invention;

[0020] Figure 4 A topological diagram of a liquid cooling thermal management system according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of power consumption in valley power state of a liquid cooling thermal management system according to one embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of power consumption during peak power consumption of a liquid cooling thermal management system according to one embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the liquid cooling flow of a battery cluster in a light storage charging and testing module of a liquid cooling thermal management system according to an embodiment of the present invention in a working state;

[0024] Figure 8 A schematic diagram of the liquid cooling flow of a battery cluster in a standby state of a light-storage-charge-test module of a liquid-cooled thermal management system according to one embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the architecture of a condensation water prevention solution for a battery cluster operating state of a light-storage-charging-detection module of a liquid-cooled thermal management system according to one embodiment of the present invention;

[0026] Figure 10 The figure is a schematic diagram of the architecture of a condensation water prevention solution for a battery cluster in standby mode of a light-storage-charge-detection module of a liquid-cooled thermal management system according to one embodiment of the present invention. DETAILED DESCRIPTION

[0027] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0028] Please refer to Figures 1 to 3 A liquid cooling thermal management method is applied to an optical storage charging and testing module, comprising the following steps:

[0029] S1. Obtain the operating status of the battery cluster;

[0030] S2. If it is detected that the current battery cluster is in the standby state, then go to step S3; if it is detected that the battery cluster is in the working state, then go to step S4;

[0031] S3, controlling the condensing fan and the natural cooling condenser to cool the solar storage charging and testing module;

[0032] S4. Control the condensing fan, condenser and compressor to cool the solar storage charging and testing module.

[0033] As can be seen from the above description, the beneficial effects of the present invention are: providing a liquid cooling thermal management method and system, which determines whether the compressor in the liquid cooling device needs to be started according to the different operating states of the battery cluster, thereby accurately controlling the temperature, reducing unnecessary cooling, and reducing system heat loss.

[0034] Furthermore, the step S3 is specifically as follows:

[0035] S31, when it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than a first preset temperature, adjusting the condensing fan to operate at a first preset power;

[0036] S32. When it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than an nth preset temperature, adjusting the condensing fan to operate at an nth preset power; the nth preset temperature is greater than the n-1th preset temperature, and the nth preset power is greater than the n-1th preset power, where n is a positive integer greater than or equal to 2;

[0037] S33. In any step of S31-S32, if it is detected that the actual cooling rate of the coolant outlet temperature within the preset time is less than the preset cooling rate, the operating power of the condensing fan is increased.

[0038] From the above description, it can be seen that the difference between the coolant outlet temperature and the ambient temperature is used as the basis for judgment. The principle is that if the ambient temperature is close to the coolant temperature, the condensing fan only needs to operate at part of the power to achieve the cooling effect. As the difference between the ambient temperature and the coolant temperature gradually increases, the operating power of the condensing fan needs to be increased to meet the cooling requirements of the natural cooling condenser; wherein, in steps S31-32, the system presets the 1st preset temperature, the 2nd preset temperature...the n-1th preset temperature and the nth preset temperature as well as the 1st preset power, the 2nd preset power...the n-1th preset power and the nth preset power, and at the same time, the presets satisfy: the n-1th preset temperature is greater than the nth preset temperature, the n-1th preset power is less than the nth preset power, and n is a positive integer greater than or equal to 2.

[0039] That is, in a certain embodiment of the present invention, when it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than the first preset temperature, the condensing fan cools the natural cooling condenser according to the first preset power; when it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than the second preset temperature, the condensing fan cools the natural cooling condenser according to the second preset power… When it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than the nth preset temperature, the condensing fan cools the natural cooling condenser according to the nth preset power, that is, each preset temperature has a corresponding preset power, and when it is lower than the preset temperature, the condensing fan operates according to the preset power corresponding to the preset temperature that is lower than the preset temperature.

[0040] In addition, when it is detected that the actual cooling rate of the coolant outlet temperature within the preset time is less than the preset cooling rate (that is, the cooling effect cannot reach the preset standard), the condensing fan will be operated at the original power and the power will be increased.

[0041] Preferably, the n value is 3, the first preset temperature is 3°C, and the first preset power is for the condensing fan to operate at a 30% duty cycle; the second preset temperature is 6°C, and the second preset power is for the condensing fan to operate at a 50% duty cycle; the third preset temperature is 10°C, and the third preset power is for the condensing fan to operate at a 70% duty cycle; the preset cooling rate is 0.3°C / min, and the preset time is 3 minutes, that is, the cooling rate should be greater than 0.3°C / min within 3 minutes, otherwise the fan operation duty cycle is increased. In a certain embodiment of the present invention, the operation duty cycle is increased by 10% each time.

[0042] Furthermore, the step S33 further includes a step S34:

[0043] S34. When it is detected that the condensing fan has reached the maximum power operation and the actual cooling rate of the coolant outlet temperature within the preset time period is less than the preset cooling rate, the condensing fan is controlled to enter the standby state.

[0044] From the above description, it can be seen that when it is detected that the condensing fan is outputting at a 100% duty cycle and still cannot achieve cooling, it means that there is an operating problem in the photovoltaic storage charging and inspection module. Relying solely on the liquid cooling system for cooling is no longer enough to achieve the cooling effect, and the photovoltaic storage charging and inspection module needs to be put into standby and shutdown.

[0045] Furthermore, the step S4 is specifically as follows:

[0046] S41, controlling the condensing fan to operate at maximum power;

[0047] S42, when it is detected that the device temperature of the battery cluster is lower than the first preset load rate and greater than the first preset temperature, adjusting the compressor to operate according to the first preset power;

[0048] S43. When it is detected that the device temperature of the battery cluster is lower than an nth preset load rate and greater than an nth preset temperature, adjusting the compressor to operate at an nth preset power; the nth preset load rate is greater than the n-1th preset load rate, the nth preset power is greater than the n-1th preset power, and the nth preset temperature is greater than the n-1th preset temperature, where n is a positive integer greater than or equal to 2;

[0049] S44. In any step of S42-S43, if it is detected that the actual cooling rate of the device temperature of the battery cluster within the preset time period is less than the preset cooling rate, the operating power of the compressor is increased.

[0050] From the above description, it can be seen that since the battery cluster is in working state at this time, the compressor needs to be started to meet the cooling demand of the battery cluster, so the device temperature of the battery cluster is used as the judgment basis; among them, in steps S42-43, the system presets the 1st preset temperature, the 2nd preset temperature...the n-1th preset temperature and the nth preset temperature as well as the 1st preset power, the 2nd preset power...the n-1th preset power and the nth preset power, and at the same time, the presets satisfy: the n-1th preset temperature is greater than the nth preset temperature, the n-1th preset power is less than the nth preset power, and n is a positive integer greater than or equal to 2.

[0051] That is, in a certain embodiment of the present invention, when it is detected that the device temperature of the battery cluster is higher than the first preset temperature and the system load rate is lower than the first preset load rate, the compressor increases the coolant pressure according to the first preset power; when it is detected that the device temperature of the battery cluster is higher than the second preset temperature and the system load rate is lower than the second preset load rate, the compressor increases the coolant pressure according to the second preset power... When it is detected that the device temperature of the battery cluster is higher than the nth preset temperature and the system load rate is lower than the nth preset load rate, the compressor increases the coolant pressure according to the nth preset power, that is, each preset temperature and each preset load rate has a corresponding preset power, and when it is lower than the preset temperature, the compressor operates according to the preset power corresponding to the preset temperature that is lower than the preset temperature.

[0052] In addition, when the actual cooling rate of the device detecting the battery cluster within the preset time is less than the preset cooling rate (that is, the cooling effect cannot reach the preset standard), the condensing fan will be operated at an increased power on the basis of the original power.

[0053] Preferably, the n value is 3, the first preset temperature is 0°C, and the first preset power is that the compressor runs at 30% frequency; the second preset temperature is 30°C, and the second preset power is that the compressor runs at 50% frequency; the third preset temperature is 60°C, and the third preset power is that the compressor runs at 70% frequency; the preset cooling rate is 0.5°C / min, and the preset time is 3 minutes, that is, the cooling rate should be greater than 0.5°C / min within 3 minutes, otherwise the fan operation duty cycle is increased. In a certain embodiment of the present invention, the operation duty cycle is increased by 10% each time.

[0054] Furthermore, the step S44 further includes a step S45:

[0055] S45 , when it is detected that the compressor reaches the maximum power and the actual cooling rate of the device temperature of the battery cluster within the preset time period is less than the preset cooling rate, control the compressor to enter the standby state.

[0056] From the above description, it can be seen that when the detection compressor outputs at 100% frequency and still cannot achieve cooling, it means that there is an operating problem in the photovoltaic storage charging and inspection module. Relying solely on the liquid cooling system for cooling is no longer enough to achieve the cooling effect, and the photovoltaic storage charging and inspection module needs to be put into standby and shutdown.

[0057] Please refer to Figures 4 to 8 , a liquid cooling thermal management system, which implements the above-mentioned liquid cooling thermal management method, includes an optical storage charging and testing module, a natural cooling module, a compressor module and a liquid cooling pipeline;

[0058] The natural cooling module includes a natural cooling condenser and a condensing fan, the condensing fan dissipates heat from the natural cooling condenser, and the natural cooling condenser is connected to the solar storage, charging and detection module through a pipeline;

[0059] The compressor module includes a compressor, a condenser, an expansion valve and a heat exchanger which are connected in sequence through a liquid cooling pipe, and the optical storage, charging and detection module performs heat exchange through the heat exchanger.

[0060] From the above description, it can be seen that a system for executing the above method is provided, including an optical storage charging and inspection system module, a natural cooling module, a compressor module and a liquid cooling pipe connecting the modules; wherein the natural cooling module is directly connected to the optical storage charging and inspection module through the liquid cooling pipe, and the compressor module performs heat exchange with the optical storage charging and inspection module through a heat exchanger, rather than being directly connected to the optical storage charging and inspection module through the liquid cooling pipe.

[0061] Furthermore, it also includes a first three-way valve, the liquid outlet of the first three-way valve is connected to the optical storage, charging and detection module; the two liquid inlets of the first three-way valve are respectively connected to the natural cooling condenser and the heat exchanger through liquid cooling pipes.

[0062] As can be seen from the above description, the first three-way valve is provided to switch between the natural cooling module and the compressor module to cool the optical storage, charging and testing module.

[0063] Furthermore, the optical storage charging and testing module includes a DC converter, an energy storage converter and a battery cluster, and the liquid cooling pipe is connected to the DC converter, the energy storage converter and the battery cluster.

[0064] From the above description, it can be seen that the photovoltaic storage charging and detection module includes a DC converter (DCDC), a power storage converter (PCS) and a battery cluster. That is, the photovoltaic storage charging and detection module can be connected to the external power grid through the PCS, or directly powered by the battery cluster. At the same time, several components are connected to the liquid cooling pipe.

[0065] Furthermore, the optical storage charging and inspection module also includes a second three-way valve and a third three-way valve, one valve port of the second three-way valve is the coolant inlet of the optical storage charging and inspection module, and the other valve ports of the second three-way valve are respectively connected to the liquid inlet of the energy storage inverter and the liquid inlet of the battery cluster; one valve port of the third three-way valve is connected to the liquid inlet of the DC converter, and the other valve ports of the three-way valve are respectively connected to the liquid outlet of the energy storage inverter and the liquid outlet of the battery cluster; the liquid outlet of the DC converter is the coolant outlet of the optical storage charging and inspection module.

[0066] From the above description, it can be seen that the liquid cooling pipe inside the optical storage charging and testing module is divided into two branches through the second three-way valve and the third three-way valve, one of which passes through the DCDC and PCS, and the other passes through the battery cluster and DCDC. Figure 8 As shown, when the battery cluster is in standby mode, the second three-way valve controls the liquid cooling pipe to be connected to the PCS (position 1), and the third three-way valve controls the liquid cooling pipe to be connected to the PCS (position 1), thereby completing the cooling of the DCDC and PCS; Figure 7 As shown, when the battery cluster is in operation, the second three-way valve controls the liquid cooling pipe to flow to the battery cluster (position 2), and the third three-way valve controls the liquid cooling pipe to flow to the battery cluster (position 2), thereby completing the cooling of the battery cluster and the DC-DC. Furthermore, the three-way valve is a solenoid three-way valve.

[0067] It can be seen from the above description that in order to facilitate the control of the switching of the three-way valve, the three-way valve is selected to be an electromagnetic three-way valve.

[0068] The present invention provides a liquid cooling thermal management method and system, which are mainly applied to the thermal management of an optical storage charging and testing module, and are described below with reference to specific embodiments.

[0069] Please refer to Figures 1 to 3 The first embodiment of the present invention is a liquid cooling heat management method applied to an optical storage charging and testing module, comprising the following steps:

[0070] S1. Obtain the operating status of the battery cluster;

[0071] S2. If it is detected that the current battery cluster is in the standby state, then go to step S3; if it is detected that the battery cluster is in the working state, then go to step S4;

[0072] S3, controlling the condensing fan and the natural cooling condenser to cool the solar storage charging and testing module;

[0073] S4. Control the condensing fan, condenser and compressor to cool the solar storage charging and testing module.

[0074] That is, in this embodiment, different cooling methods are adopted for the light storage charging and testing module based on the operating status of the battery cluster; specifically, Figure 5 As shown in the figure, when the mains power is scheduled as valley power, if there is external demand for charging, the mains power will pass through the PCS to the DCDC and then to the external output, such as the electric vehicle demand charging, to complete the charging; if the external demand is met, the mains power will pass through the PCS to the battery cluster to complete the charging of the battery cluster; Figure 6 As shown in the figure, when the mains is scheduled for peak power, the battery cluster has sufficient energy storage, so no mains power is required. Power flows from the battery cluster to the DCDC, which then supplies power to external needs, thus saving electricity costs. This allows the battery cluster's operating status during off-peak and peak power periods to be determined, and further determines whether the compressor in the liquid cooling system needs to be activated. This allows for precise temperature control, reduces unnecessary cooling, and reduces system heat loss.

[0075] Please refer to Figures 1 to 3, the second embodiment of the present invention is: based on the first embodiment, step S3 is specifically as follows:

[0076] S31, when it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than a first preset temperature, adjusting the condensing fan to operate at a first preset power;

[0077] S32. When it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than an nth preset temperature, adjusting the condensing fan to operate at an nth preset power; the nth preset temperature is greater than an n-1th preset temperature, and the nth preset power is greater than an n-1th preset power, where n is a positive integer greater than or equal to 2;

[0078] S33. In any step of S31-S32, if it is detected that the actual cooling rate of the coolant outlet temperature within the preset time is less than the preset cooling rate, the operating power of the condensing fan is increased.

[0079] Step S33 is followed by step S34:

[0080] S34. When it is detected that the condensing fan has reached the maximum power and the actual cooling rate of the coolant outlet temperature within the preset time is less than the preset cooling rate, the condensing fan is controlled to enter the standby state.

[0081] That is, in this embodiment, the difference between the coolant outlet temperature and the ambient temperature is used as the basis for judgment. The principle is that if the ambient temperature is close to the coolant temperature, the condensing fan only needs to operate at part of its power to achieve the cooling effect. As the difference between the ambient temperature and the coolant temperature gradually increases, the operating power of the condensing fan needs to be increased to meet the cooling requirements of the natural cooling condenser.

[0082] Specifically, when it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than the first preset temperature, the condensing fan cools the natural cooling condenser according to the first preset power; when it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than the second preset temperature, the condensing fan cools the natural cooling condenser according to the second preset power… When it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than the nth preset temperature, the condensing fan cools the natural cooling condenser according to the nth preset power, that is, each preset temperature has a corresponding preset power. When it is lower than the preset temperature, the condensing fan operates according to the preset power corresponding to the preset temperature that is lower than the preset temperature.

[0083] Preferably, the n value is 3, the first preset temperature is 3°C, and the first preset power is for the condensing fan to operate at a 30% duty cycle; the second preset temperature is 6°C, and the second preset power is for the condensing fan to operate at a 50% duty cycle; the third preset temperature is 10°C, and the third preset power is for the condensing fan to operate at a 70% duty cycle; the preset cooling rate is 0.3°C / min, and the preset time is 3 minutes, that is, the cooling rate should be greater than 0.3°C / min within 3 minutes, otherwise the fan operation duty cycle is increased. In a certain embodiment of the present invention, the operation duty cycle is increased by 10% each time.

[0084] In addition, if the actual cooling rate of the coolant outlet temperature within the preset time period is detected to be less than the preset cooling rate (i.e., the cooling effect cannot meet the preset standard), the condensing fan will be operated at the original power but the power will be increased. If the condensing fan output is detected to be at a 100% duty cycle and still cannot achieve cooling, it indicates that there is an operational problem in the solar storage charging and inspection module. Relying solely on the liquid cooling system to cool the system is no longer sufficient, and the solar storage charging and inspection module needs to be shut down.

[0085] Please refer to Figures 1 to 3 , the third embodiment of the present invention is: based on the first embodiment, step S4 is specifically as follows:

[0086] S41, controlling the condensing fan to operate at maximum power;

[0087] S42, when it is detected that the device temperature of the battery cluster is higher than the first preset temperature, adjusting the compressor to operate according to the first preset power;

[0088] S43. When it is detected that the device temperature of the battery cluster is higher than an nth preset temperature, the compressor is adjusted to operate at an nth preset power; the nth preset temperature is greater than an n-1th preset temperature, and the nth preset power is greater than an n-1th preset power, where n is a positive integer greater than or equal to 2;

[0089] S44. In any step of S42-S43, if it is detected that the actual cooling rate of the device temperature of the battery cluster within the preset time period is less than the preset cooling rate, the operating power of the compressor is increased.

[0090] Step S44 is followed by step S45:

[0091] S45 , when it is detected that the compressor reaches the maximum power and the actual cooling rate of the device temperature of the battery cluster within the preset time period is less than the preset cooling rate, the compressor is controlled to enter the standby state.

[0092] That is, in this embodiment, since the battery cluster is in a working state at this time, the compressor needs to be started to meet the cooling demand of the battery cluster, so the device temperature of the battery cluster is used as the judgment basis.

[0093] That is, in a certain embodiment of the present invention, when it is detected that the device temperature of the battery cluster is higher than the first preset temperature and the system load rate is lower than the first preset load rate, the compressor increases the coolant pressure according to the first preset power; when it is detected that the device temperature of the battery cluster is higher than the second preset temperature and the system load rate is lower than the second preset load rate, the compressor increases the coolant pressure according to the second preset power... When it is detected that the device temperature of the battery cluster is higher than the nth preset temperature and the system load rate is lower than the nth preset load rate, the compressor increases the coolant pressure according to the nth preset power, that is, each preset temperature and each preset load rate has a corresponding preset power, and when it is lower than the preset temperature, the compressor operates according to the preset power corresponding to the preset temperature that is lower than the preset temperature.

[0094] Preferably, the value of n is 3, the first preset load rate is 30% of the system rated load rate, the first preset temperature is 0°C, and the first preset power is that the compressor runs at a frequency of 30%; the second preset load rate is 60% of the system rated load rate, the second preset temperature is 30°C, and the second preset power is that the compressor runs at a frequency of 50%; the third preset load rate is 100% of the system rated load rate, the third preset temperature is 60°C, and the third preset power is that the compressor runs at a frequency of 70%; the preset cooling rate is 0.5°C / min, and the preset time is 3min, that is, the cooling rate should be greater than 0.5°C / min within 3min, otherwise the fan operating duty cycle is increased. In a certain embodiment of the present invention, the operating duty cycle is increased by 10% each time.

[0095] Additionally, if the actual cooling rate of the battery cluster's temperature within a preset timeframe is less than the preset cooling rate (i.e., the cooling effect fails to meet the preset criteria), the condensing fan will be operated at a higher power level, while maintaining its original power. If the compressor output is at 100% frequency and still fails to achieve cooling, this indicates an operational issue within the solar-storage-charge-and-test module, and relying solely on the liquid cooling system is insufficient, requiring the module to be placed into standby mode.

[0096] Please refer to Figure 4 , Embodiment 4 of the present invention is: a liquid cooling thermal management system, which implements a liquid cooling thermal management method of any one of the above embodiments 1 to 3, including an optical storage charging and detection module, a natural cooling module, a compressor module and a liquid cooling pipeline;

[0097] The natural cooling module includes a natural cooling condenser and a condensing fan. The condensing fan dissipates heat from the natural cooling condenser. The natural cooling condenser is connected to the solar storage and charging module through a pipeline.

[0098] The compressor module includes a compressor, a condenser, an expansion valve and a heat exchanger which are connected in sequence through a liquid cooling pipe, and the optical storage, charging and inspection module performs heat exchange through the heat exchanger.

[0099] That is, in this embodiment, a system for executing the above method is provided, including an optical storage charging and inspection system module, a natural cooling module, a compressor module, and a liquid cooling pipe connecting the modules; wherein the natural cooling module is directly connected to the optical storage charging and inspection module through the liquid cooling pipe, and the compressor module performs heat exchange with the optical storage charging and inspection module through a heat exchanger, rather than being directly connected to the optical storage charging and inspection module through the liquid cooling pipe.

[0100] Please refer to Figures 4 to 8 The fifth embodiment of the present invention is as follows: Based on the fourth embodiment, it further includes a first three-way valve, the liquid outlet of the first three-way valve being connected to the photovoltaic storage charging and inspection module; the two liquid inlets of the first three-way valve being connected to the natural cooling condenser and the heat exchanger respectively through liquid cooling pipes; based on the operating status of the battery cluster during valley power and peak power phases, the first three-way valve is used to cool the photovoltaic storage charging and inspection module during valley power phases via the condensing fan and the natural cooling condenser; and during peak power phases, the photovoltaic storage charging and inspection module is cooled via the condensing fan, condenser, and compressor, thereby achieving precise temperature control, reducing unnecessary cooling, and lowering system heat loss. That is, in this embodiment, the first three-way valve is provided to switch between the natural cooling module and the compressor module for cooling the photovoltaic storage charging and inspection module.

[0101] The solar-storage charging and inspection module also includes a second three-way valve and a third three-way valve. One valve port of the second three-way valve serves as the coolant inlet for the solar-storage charging and inspection module, while the remaining valve ports connect to the liquid inlet of the energy storage converter and the liquid inlet of the battery cluster, respectively. One valve port of the third three-way valve connects to the liquid inlet of the DC converter, while the remaining valve ports connect to the liquid outlet of the energy storage converter and the liquid outlet of the battery cluster, respectively. The liquid outlet of the DC converter serves as the coolant outlet for the solar-storage charging and inspection module. Specifically, the three-way valve is an electromagnetic three-way valve.

[0102] At the same time, the photovoltaic storage charging and inspection module includes a DC converter (DCDC), a power storage converter (PCS) and a battery cluster, that is, the photovoltaic storage charging and inspection module can be connected to the external power grid through the PCS, or directly powered by the battery cluster, and several components are connected to the liquid cooling pipe. In addition, the liquid cooling pipe inside the photovoltaic storage charging and inspection module is divided into two branches through the second three-way valve and the third three-way valve, one of which passes through the DCDC and PCS, and the other passes through the battery cluster and DCDC. In this embodiment, Figure 8 As shown, when the battery cluster is in standby mode, the second three-way valve controls the liquid cooling pipe to be connected to the PCS (position 1), and the third three-way valve controls the liquid cooling pipe to be connected to the PCS (position 1), thereby completing the cooling of the DCDC and PCS; Figure 7 As shown, when the battery cluster is in working state, the second three-way valve controls the liquid cooling pipeline to conduct the battery cluster (position 2), and the third three-way valve controls the liquid cooling pipeline to conduct the battery cluster (position 2), thereby completing the cooling of the battery cluster and DCDC.

[0103] Preferably, in this embodiment, Figures 9 and 10 Plate heat exchangers are connected in parallel to the PCS and DCDC liquid cooling pipelines, and the flow of coolant through the PCS and DCDC is regulated by a pump body. The purpose is to prevent the formation of condensation water. The specific principle is as follows: Under high temperature and high humidity conditions, the cooling water temperature flowing through the PCS and DCDC can be raised by a preset threshold, so that the water temperature is higher than the ambient air temperature, thereby avoiding the formation of condensation water. At the same time, due to the function of the plate heat exchanger, the PCS and DCDC adopt independent coolant circulation and are treated separately from the coolant of the battery cluster. Even if the coolant flowing through the PCS and DCDC modules is heated separately, it will not affect the coolant flowing through the battery cluster, that is, it will not affect the cooling effect of the coolant; specifically, the preset threshold is 8°C.

[0104] In summary, the present invention provides a liquid cooling thermal management method and system that determines whether the compressor in the liquid cooling device needs to be started based on the different operating states of the battery cluster, thereby accurately controlling the temperature, reducing unnecessary cooling, and lowering system heat loss.

[0105] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid cooling thermal management system for an optical storage and charging inspection station, characterized by: It includes optical storage, charging and inspection module, natural cooling module, compressor module and liquid cooling pipeline; The natural cooling module includes a natural cooling condenser and a condensing fan, the condensing fan dissipates heat from the natural cooling condenser, and the natural cooling condenser is connected to the solar storage, charging and detection module through a pipeline; The compressor module includes a compressor, a condenser, an expansion valve and a heat exchanger connected in sequence through a liquid cooling pipe, and the optical storage, charging and detection module performs heat exchange through the heat exchanger; The optical storage charging and testing module includes a DC converter, an energy storage converter and a battery cluster, and the liquid cooling pipe is connected to the DC converter, the energy storage converter and the battery cluster; The optical storage charging and inspection module further includes a second three-way valve and a third three-way valve. One valve port of the second three-way valve serves as the coolant inlet of the optical storage charging and inspection module, and the remaining valve ports of the second three-way valve are respectively connected to the liquid inlet of the energy storage converter and the liquid inlet of the battery cluster; one valve port of the third three-way valve is connected to the liquid inlet of the DC converter, and the remaining valve ports of the third three-way valve are respectively connected to the liquid outlet of the energy storage converter and the liquid outlet of the battery cluster; the liquid outlet of the DC converter serves as the coolant outlet of the optical storage charging and inspection module; When the battery cluster is in a standby state, the second three-way valve is connected to the energy storage converter, and the third three-way valve is connected to the energy storage converter to cool the energy storage converter and the DC converter; When the battery cluster is in operation, the second three-way valve is connected to the battery cluster, and the third three-way valve is connected to the battery cluster to cool the battery cluster and the DCDC; Plate heat exchangers are respectively connected in parallel on the liquid cooling pipelines of the energy storage converter and the DC converter.

2. The liquid cooling thermal management system for an optical storage and charging inspection station according to claim 1, characterized in that: The system implements a liquid cooling thermal management method, the method comprising the steps of: S1. Obtain the operating status of the battery cluster; S2. If it is detected that the current battery cluster is in the standby state, then go to step S3; if it is detected that the battery cluster is in the working state, then go to step S4; S3, controlling the condensing fan and the natural cooling condenser to cool the solar storage charging and testing module; S4. Control the condensing fan, condenser and compressor to cool the solar storage charging and testing module.

3. The liquid cooling thermal management system for an optical storage and charging inspection station according to claim 2, characterized in that: In the method, step S3 is specifically: S31, when it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than a first preset temperature, adjusting the condensing fan to operate at a first preset power; S32. When it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than an nth preset temperature, adjusting the condensing fan to operate at an nth preset power; the nth preset temperature is greater than an n-1th preset temperature, and the nth preset power is greater than an n-1th preset power, where n is a positive integer greater than or equal to 2; S33. In any step of S31-S32, if it is detected that the actual cooling rate of the coolant outlet temperature within the preset time is less than the preset cooling rate, the operating power of the condensing fan is increased.

4. The liquid cooling thermal management system for an optical storage and charging inspection station according to claim 3, characterized in that: The step S33 further includes a step S34: S34: When it is detected that the condensing fan has reached the maximum power and the actual cooling rate of the coolant outlet temperature within the preset time is less than the preset cooling rate, the solar storage charging and detection module is controlled to enter the standby state.

5. The liquid cooling thermal management system for an optical storage, charging, and inspection station according to claim 2, characterized in that: In the method, step S4 is specifically: S41, controlling the condensing fan to operate at maximum power; S42, when it is detected that the device temperature of the battery cluster is lower than the first preset load rate and greater than the first preset temperature, adjusting the compressor to operate according to the first preset power; S43. When it is detected that the device temperature of the battery cluster is lower than an nth preset load rate and greater than an nth preset temperature, adjusting the compressor to operate at an nth preset power; the nth preset load rate is greater than an n-1th preset load rate, the nth preset power is greater than an n-1th preset power, and the nth preset temperature is greater than an n-1th preset temperature, where n is a positive integer greater than or equal to 2; S44. In any step of S42-S43, if it is detected that the actual cooling rate of the device temperature of the battery cluster within the preset time period is less than the preset cooling rate, the operating power of the compressor is increased.

6. The liquid cooling thermal management system for an optical storage and charging inspection station according to claim 5, characterized in that: The step S44 further includes a step S45: S45 , when it is detected that the compressor has reached the maximum power and the actual cooling rate of the battery cluster device temperature within the preset time period is less than the preset cooling rate, the solar storage charging and testing module is controlled to enter the standby state.

7. The liquid cooling thermal management system for an optical storage, charging, and inspection station according to claim 1, characterized in that: The liquid cooling thermal management system also includes a first three-way valve, the liquid outlet of the first three-way valve is connected to the optical storage charging and detection module; the two liquid inlets of the first three-way valve are respectively connected to the natural cooling condenser and the heat exchanger through liquid cooling pipes.

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