Liquid cooling heat management system of optical storage charging inspection station

Abstract

A liquid cooling heat management method and system are applied to an optical storage charging detection module, and the method comprises the following steps: obtaining the operation state of a battery cluster; if it is detected that the current battery cluster is in the standby state, a condensate fan and a natural cooling condenser are controlled to cool an optical storage charging detection module; and if it is detected that the battery cluster is in the working state, a condensation fan, a condenser and a compressor are controlled to cool the optical storage charging detection module. According to the liquid cooling heat management method and system provided by the invention, whether the compressor in the liquid cooling device needs to be started or not is judged according to different running states of the battery cluster, so that the temperature is accurately controlled, unnecessary cooling is reduced, and the heat loss of the system is reduced.

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 because of their 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] At present, air cooling and liquid cooling are the main cooling methods for the integration of photovoltaic storage charging and inspection systems. Among them, air cooling has low cost, controllable battery cell temperature during the cooling process, and convenient operation and maintenance, so it is the main cooling method. However, air cooling has high power consumption and occupies a large area, especially for photovoltaic storage charging and 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 liquid cooling thermal management strategy currently adapted to photovoltaic storage charging and inspection systems cannot accurately control the temperature, resulting in a large amount of unnecessary cooling during the working process, which increases the 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, obtaining 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 light storage charging and testing module;

[0011] S4, control the condensing fan, condenser and compressor to cool the optical 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, which implements a liquid cooling thermal management method, includes 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 for the natural cooling condenser, and the natural cooling condenser is connected to the solar storage charging and testing 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 inspection 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 A 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 in 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 in 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 A schematic diagram of power consumption in a valley power state of a liquid cooling thermal management system according to an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of power consumption in a peak power state of a liquid cooling thermal management system according to an embodiment of the present invention;

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

[0024] Figure 8 A schematic diagram of the liquid cooling flow direction of a battery cluster in a standby state of a light storage charging and testing module of a liquid cooling thermal management system according to an embodiment of the present invention;

[0025] Fig. 9 It is a schematic diagram of the architecture of a condensation water prevention solution for a battery cluster working state of a light storage charging and testing module of a liquid cooling thermal management system according to an embodiment of the present invention;

[0026] Fig.10 The present invention is a schematic diagram of the architecture of a condensation water prevention solution for a battery cluster in a standby state of a light storage charging and testing module of a liquid cooling thermal management system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

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

[0029] S1, obtaining 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 light storage charging and testing module;

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

[0033] From the above description, it can be seen that the beneficial effects of the present invention are: providing a liquid cooling thermal management method and system, according to the different operating states of the battery cluster, judging whether the compressor in the liquid cooling device needs to be started, so as to accurately control the temperature, reduce unnecessary cooling, and reduce 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 the nth preset temperature, adjusting the condensing fan to operate at the nth preset power; the nth preset temperature is greater than the n-1th preset temperature, the nth preset power is greater than the n-1th preset power, and 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 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; 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 at 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 value of n is 3, the first preset temperature is 3°C, and the first preset power is 30% duty cycle operation of the condensing fan; the second preset temperature is 6°C, and the second preset power is 50% duty cycle operation of the condensing fan; the third preset temperature is 10°C, and the third preset power is 70% duty cycle operation of the condensing fan; the preset cooling rate is 0.3°C / min, and the preset time is 3min, that is, the cooling rate should be greater than 0.3°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.

[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 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, and relying solely on the liquid cooling system to cool down is no longer able 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 the nth preset load rate and greater than the nth preset temperature, adjusting the compressor to operate according to the 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-1st 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 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 equipment temperature of the battery cluster is used as the basis for judgment; wherein, 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 and 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 pressure of the coolant 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 pressure of the coolant 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 pressure of the coolant 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 is operated at the original power and the power is increased.

[0053] Preferably, the value of n is 3, 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 temperature is 30°C, and the second preset power is that the compressor runs at a frequency of 50%; 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.

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

[0055] S45: When it is detected that the compressor reaches the maximum power operation 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.

[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 optical storage charging and inspection module, and relying solely on the liquid cooling system to cool down is no longer enough to achieve the cooling effect, and the optical 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, comprises 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 for the natural cooling condenser, and the natural cooling condenser is connected to the solar storage charging and testing 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 inspection 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 a 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 a 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] It can be seen from the above description that 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 pipeline 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, wherein a valve port of the second three-way valve is a 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 inverter and the liquid inlet of the battery cluster; a 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 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 pipeline 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 pipeline to conduct to the PCS (position 1), and the third three-way valve controls the liquid cooling pipeline to conduct 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. Further, the three-way valve is an electromagnetic 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 as an electromagnetic three-way valve.

[0068] The present invention provides a liquid cooling thermal management method and system, which are mainly used for thermal management of an optical storage charging and testing module, and are described below in conjunction with 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, obtaining 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 light storage charging and testing module;

[0073] S4, control the condensing fan, condenser and compressor to cool the optical 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 city power is scheduled as valley power, if there is external demand for charging, the city power is sent from PCS to DCDC and then to the external output, such as electric vehicle charging, to complete the charging; if the external demand is met, the city power is sent from PCS to the battery cluster to complete the charging of the battery cluster; Figure 6 As shown in the figure, when the city power is dispatched to peak power, the battery cluster has sufficient energy storage, and no city power is needed. The power is supplied from the battery cluster to the DCDC, and the DCDC completes the power supply to the external demand, so as to save electricity costs. Therefore, the operating status of the battery cluster in the valley power and peak power stages can be judged, and then it can be judged whether the compressor in the liquid cooling device needs to be started, so as to accurately control the temperature, reduce unnecessary cooling, and reduce system heat loss.

[0075] Please refer to Figures 1 to 3, Embodiment 2 of the present invention is: Based on Embodiment 1, 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 the first preset temperature, adjusting the condensing fan to operate according to the first preset power;

[0077] S32, when it is detected that the difference between the coolant outlet temperature and the ambient temperature is lower than the nth preset temperature, adjusting the condensing fan to operate at the nth preset power; the nth preset temperature is greater than the n-1th preset temperature, the nth preset power is greater than the n-1th preset power, and 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 further includes 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 partial 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 at the preset power corresponding to the preset temperature that is lower than the preset temperature.

[0083] Preferably, the value of n is 3, the first preset temperature is 3°C, and the first preset power is 30% duty cycle operation of the condensing fan; the second preset temperature is 6°C, and the second preset power is 50% duty cycle operation of the condensing fan; the third preset temperature is 10°C, and the third preset power is 70% duty cycle operation of the condensing fan; the preset cooling rate is 0.3°C / min, and the preset time is 3min, that is, the cooling rate should be greater than 0.3°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.

[0084] 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. When it is detected that the condensing fan outputs at a 100% duty cycle and still cannot achieve cooling, it means that there is an operating problem in the solar storage charging and inspection module, and the cooling effect can no longer be achieved by relying solely on the liquid cooling system, and the solar storage charging and inspection module needs to be shut down.

[0085] Please refer to Figures 1 to 3 , Embodiment 3 of the present invention is: Based on Embodiment 1, 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 the nth preset temperature, adjusting the compressor to operate according to the nth preset power; the nth preset temperature is greater than the n-1th preset temperature, the nth preset power is greater than the n-1th preset power, and 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 is less than the preset cooling rate, the operating power of the compressor is increased.

[0090] Step S44 further includes 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 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 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 pressure of the coolant 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 pressure of the coolant 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 pressure of the coolant 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] In addition, when the actual cooling rate of the device temperature of 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 the original power and the power will be increased. 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 to cool down can no longer meet the cooling effect, and the photovoltaic storage charging and inspection module needs to be shut down.

[0096] Please refer to Figure 4 , Embodiment 4 of the present invention is: a liquid cooling thermal management system, executing a liquid cooling thermal management method of any one of Embodiments 1 to 3 above, comprising an optical storage charging and testing 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 charging and testing 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: on the basis of the fourth embodiment, it also includes a first three-way valve, the liquid outlet of the first three-way valve is connected to the light storage charging and inspection 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; according to the judgment of the operating status of the battery cluster in the valley power and peak power stages, the first three-way valve is used to cool the light storage charging and inspection module through the condensing fan and the natural cooling condenser during valley power; during peak power, the light storage charging and inspection module is cooled through the condensing fan, condenser and compressor, so as to accurately control the temperature, reduce unnecessary cooling, and reduce system heat loss. That is, in this embodiment, the first three-way valve is set to switch the natural cooling module or the compressor module to cool the light storage charging and inspection module.

[0101] The optical storage charging and inspection module also includes a second three-way valve and a third three-way valve, one of the valve ports 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 converter and the liquid inlet of the battery cluster; one of the valve ports of the third three-way valve is connected to the liquid inlet of the DC converter, and the other 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 is the coolant outlet of the optical 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 pipeline to conduct to the PCS (position 1), and the third three-way valve controls the liquid cooling pipeline to conduct 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 respectively, and the flow of coolant flowing through the PCS and DCDC is regulated by a pump body. The purpose is to prevent the generation of condensed 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 increased by a preset threshold, so that the water temperature is higher than the ambient air temperature to avoid the generation of condensed water. At the same time, due to the effect of the plate heat exchanger, PCS and DCDC adopt separate coolant circulation, which is 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, 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.

[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 specification 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 in that: It includes a light storage charging and testing module, a natural cooling module, a compressor module and a liquid cooling pipeline; The natural cooling module includes a natural cooling condenser and a condensing fan, the condensing fan dissipates heat for the natural cooling condenser, and the natural cooling condenser is connected to the solar storage charging and testing module through a pipeline; The compressor module comprises 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 testing 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 pipeline is connected with 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, wherein a valve port of the second three-way valve is a 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 a liquid inlet of the energy storage converter and a liquid inlet of the battery cluster; a valve port of the third three-way valve is connected to a liquid inlet of the DC converter, and the remaining valve ports of the third three-way valve are respectively connected to a liquid outlet of the energy storage converter and a liquid outlet of the battery cluster; the liquid outlet of the DC converter is a 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 working state, 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 DCDC; The liquid cooling pipelines of the energy storage converter and the DC converter are respectively connected in parallel with plate heat exchangers.

2. According to claim 1, a liquid cooling thermal management system for an optical storage, charging and inspection station is characterized in that: The system implements a liquid cooling thermal management method, the method comprising the steps of: S1, obtaining 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 light storage charging and testing module; S4, control the condensing fan, condenser and compressor to cool the optical storage charging and testing module.

3. The liquid cooling thermal management system of the optical storage charging and inspection station according to claim 2 is 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 the nth preset temperature, adjusting the condensing fan to operate at the nth preset power; the nth preset temperature is greater than the n-1th preset temperature, the nth preset power is greater than the n-1th preset power, and 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 of the optical storage charging and inspection station according to claim 3 is characterized in that: The step S33 also includes a step S34: S34: When it is detected that the condensing fan reaches 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 light storage charging and testing module is controlled to enter the standby state.

5. The liquid cooling thermal management system of the optical storage charging and inspection station according to claim 2 is 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 the nth preset load rate and greater than the nth preset temperature, adjusting the compressor to operate according to the 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; 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 is less than the preset cooling rate, the operating power of the compressor is increased.

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

7. The liquid cooling thermal management system of the optical storage charging and inspection station according to claim 1 is characterized in that: The liquid-cooled thermal management system also includes a first three-way valve, a liquid outlet of the first three-way valve is connected to the optical storage charging and detection module; 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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