Charging pile system based on immersed liquid cooling technology and waste heat recovery

Abstract

The invention belongs to the field of charging pile energy recovery, and particularly relates to a charging pile system based on an immersed liquid cooling technology and waste heat recovery. A power distribution unit is arranged on the inner side wall of a shell, a liquid cooling box is arranged in the shell, the liquid cooling box is filled with cooling liquid, and a charging module is arranged in the liquid cooling box; the charging module is completely immersed in cooling liquid in the liquid cooling box, two heat exchange assemblies are arranged on one side of the liquid cooling box and located in the shell, a water storage assembly is arranged on one side of the shell, and the liquid cooling box and the two heat exchange assemblies communicate with each other and form circulating heat exchange on the cooling liquid in the liquid cooling box. The two heat exchange assemblies and the water storage assembly communicate with each other, and circulating heat exchange of water in the heat preservation water tank is formed. Through the arrangement of the cooling liquid purity detection module and other assemblies, real-time purity detection can be conducted on cooling liquid flowing back into the liquid cooling box, and when the first plate heat exchanger breaks down, the second plate heat exchanger is switched to guarantee hot water supply.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of charging pile energy recovery, and particularly relates to a charging pile system based on submerged liquid cooling technology and waste heat recovery. BACKGROUND

[0002] In recent years, "oil to electricity" has become the choice of transformation of the transportation industry, and heavy trucks, as the core carrier of road transportation, account for more than 50% of the total carbon emissions of commercial vehicles. Due to high charging power and long charging time, the charging pile will generate high power loss and high heat during charging, which is easy to cause large energy waste, and if it can be utilized, the charging cost can be effectively reduced.

[0003] The patent application number CN202323394868.8 discloses a heat recovery system based on a charging device, applied to the field of micro-nano energy control technology. The system comprises at least one charging device, a liquid cooling heat dissipation module, a liquid cooling circulation system and a heating device. The liquid cooling circulation system comprises a liquid cooling circulation pipeline and a liquid cooling pump. The liquid cooling circulation pipeline is connected with the liquid cooling pump, the liquid cooling heat dissipation module and the heating device. The liquid cooling heat dissipation module is arranged in the charging device. The heat dissipation medium in the liquid cooling circulation pipeline circulates, absorbs and carries away the heat generated by the charging device through the liquid cooling heat dissipation module, flows to the heating device to provide heat for the heating device, and then returns to the liquid cooling pump for heat dissipation and cooling treatment, and the next cycle. The utility model adopts a liquid cooling pump to circulate and cool, can circulate the heat of the charging device along the liquid cooling circulation pipeline to the heating device to provide heat for the heating device, thereby effectively utilizing the heat generated by the charging device and improving the energy utilization rate.

[0004] In the prior art, through the setting of components such as liquid cooling pumps, the charging device can be cooled, and the heat absorbed during cooling can be used for heating, but there are still deficiencies: Firstly, the existing heavy truck charging pile lacks purity detection of the cooling liquid when using liquid cooling heat exchange, so that when the heat exchange component fails, the water required for heat exchange flows into the cooling liquid and returns to the heating module of the charging pile, causing the increase of the conductivity coefficient of the cooling liquid, causing the short circuit of the charging pile, and the quick switching of the standby heat exchange module cannot be realized when the heat exchange component fails, and the normal operation of the charging pile cannot be ensured.

[0005] Secondly, the existing charging pile lacks emergency response to the lack of water required for heat exchange when the cooling liquid is working, so that when the water required for heat exchange is lacking, the cooling of the cooling liquid cannot be continued, and the entire charging pile is damaged due to overheating; Then, the existing charging pile lacks control of the flow rate of the cooling liquid at different charging powers when heat exchange is performed, so that when the charging pile is operated at high power, the cooling liquid cannot form rapid cooling of the heating module of the charging pile due to the low flow rate of the cooling liquid, and when the charging pile is operated at low power, the cooling liquid flows through the inside of the heat exchange assembly for a short time due to the too fast flow rate of the cooling liquid, resulting in low heat exchange efficiency.

[0006] Finally, when the external temperature is low, the temperature of the cooling liquid absorbed by the heating assembly of the charging pile cannot meet the needs of the heat exchange assembly, so that the entire charging pile cannot produce enough hot water for external personnel to use through heat exchange. SUMMARY

[0007] In order to overcome the shortcomings of the prior art, the present application provides a charging pile system based on immersion liquid cooling technology and waste heat recovery. Through the arrangement of the cooling liquid purity detection module and other components, the cooling liquid flowing back to the inside of the liquid cooling tank can be detected in real time for purity, and when a fault occurs in the circuit of the first plate heat exchanger, the circuit of the second plate heat exchanger is switched to ensure normal operation of the charging pile.

[0008] In order to achieve the above purpose, the present application provides the following technical scheme: a charging pile system based on immersion liquid cooling technology and waste heat recovery, comprising a shell, a power distribution unit is arranged on the inner side wall of the shell, a liquid cooling tank is arranged inside the shell, the inside of the liquid cooling tank is filled with cooling liquid, a charging module is arranged inside the liquid cooling tank, the charging module is completely immersed in the cooling liquid inside the liquid cooling tank, two groups of heat exchange assemblies are arranged on one side of the liquid cooling tank inside the shell, a water storage assembly is arranged on one side of the shell, the liquid cooling tank and the two groups of heat exchange assemblies are connected to each other and form a circulating heat exchange of the cooling liquid inside the liquid cooling tank, the two groups of heat exchange assemblies and the water storage assembly are connected to each other and form a circulating heat exchange of the water inside the heat preservation tank, a cooling liquid purity detection module is arranged inside the cooling liquid return pipeline between the two groups of heat exchange assemblies and the liquid cooling tank, and the two groups of heat exchange assemblies can operate simultaneously or individually.

[0009] Preferably, the lower end surface of the liquid cooling tank is uniformly provided with a plurality of flow equalization pipes, the inner side wall of each of the plurality of flow equalization pipes is provided with a plurality of flow distribution holes, and two liquid inlet ports are communicated and arranged on one side of the side wall of the liquid cooling tank.

[0010] Preferably, the heat exchange assembly comprises a first plate heat exchanger arranged in the interior of the shell, a second magnetic force pump is arranged between the first plate heat exchanger and the liquid cooling tank, the second magnetic force pump forms accelerated circulation of the cooling liquid between the liquid cooling tank and the first plate heat exchanger, a first water pump is arranged on one side of the first plate heat exchanger in the interior of the shell, and the first water pump forms speed-controlled circulation of the water between the water storage assembly and the first plate heat exchanger.

[0011] Preferably, the interior of the shell is provided with an intelligent control module, the intelligent control module comprises an edge computing controller, a temperature sensor, a flow meter, a water quality monitoring probe, and an Internet of Things communication module.

[0012] Preferably, the control logic of the intelligent control module is that, according to the charging power (P) and the temperature (T) of the water storage tank, the cooling liquid demand flow is calculated according to the formula Q=0.02P+0.5T; when P>200kW, the second magnetic force pump driving mode is started, and when P≤200kW, the natural convection mode is switched; the heat dissipation efficiency of the charging module is preferentially guaranteed during the charging peak period, and the circulation flow of the cooling liquid in the first plate heat exchanger is reduced during the charging low load period.

[0013] Preferably, the cooling liquid in the liquid cooling tank is a silicon oil-based cooling liquid, and the ignition point of the silicon oil-based cooling liquid is ≥300℃.

[0014] Preferably, the liquid cooling tank is double-layered, the outer layer of the liquid cooling tank is a heat preservation layer, and the inner layer is a corrosion-resistant layer.

[0015] Preferably, the water storage assembly comprises a heat preservation water tank and a water storage tank, the input port of the heat preservation water tank is communicated with the first water pump, the water storage tank is communicated with the first plate heat exchanger, the water storage tank and the heat preservation water tank are communicated with each other through an electric water valve, and the interior of the heat preservation water tank is provided with an electric auxiliary heating module.

[0016] Preferably, the heat exchange assembly further comprises a second plate heat exchanger arranged in the interior of the shell, and the communication and circulation heat exchange mode between the second plate heat exchanger and the liquid cooling tank and the water storage assembly is the same as that of the first plate heat exchanger.

[0017] Preferably, the top of the shell is provided with an air cooling radiator, a plurality of connecting pipes are arranged in communication between the input end and the output end of the air cooling radiator and the liquid cooling tank, and a first magnetic force pump is arranged in the return pipe formed by the air cooling radiator and the plurality of connecting pipes.

[0018] Compared with the prior art, the beneficial effects of the scheme are as follows: (1) The cooling liquid purity detection module, the first plate heat exchanger, the second plate heat exchanger and other components are arranged, the cooling liquid flowing back to the liquid cooling tank from the first plate heat exchanger can be detected in real time, when the cooling liquid purity is reduced due to the fault of the line where the first plate heat exchanger is arranged, the first plate heat exchanger is closed and the second plate heat exchanger is switched to carry out the heat exchange cooling treatment of the cooling liquid, so that the normal operation of the charging pile is ensured; (2) The first magnetic pump, the plurality of connecting pipelines, the air cooling radiator and other components are arranged, the cooling liquid in the liquid cooling tank can be introduced into the air cooling radiator to carry out the air cooling treatment, so that the normal operation of the charging pile in the water shortage state is effectively ensured; (3) The plurality of connecting pipelines and the second magnetic pump and other components are arranged, the flow rate of the cooling liquid flowing through the first plate heat exchanger can be adjusted according to different working powers of the charging pile, when the power is low, the cooling liquid can be squeezed into the first plate heat exchanger to carry out the cooling heat exchange treatment through thermal expansion and contraction of the cooling liquid, when the power is high, the cooling liquid can be accelerated by the second magnetic pump to ensure the rapid circulation of the cooling liquid in the liquid cooling tank, and then the rapid cooling treatment of the charging module is formed, so that the normal operation of the charging pile is ensured; (4) The electric auxiliary heating module and other components are arranged, when the overall heat exchange efficiency of the charging pile cannot meet the continuous output of hot water to the outside in the low temperature environment, the water in the heat preservation water tank can be heated by the electric auxiliary heating, so that the hot water supply in the low temperature environment is met, and then the continuous output of hot water of the charging pile in the whole period is ensured. DRAWINGS

[0019] Figure 1 It is the first perspective view of the present application; Figure 2 It is the second perspective view of the present application; Figure 3 It is the side view of the present application; Figure 4 It is the perspective view of the heat preservation water tank part in the present application; Figure 5 It is the perspective view of the liquid cooling tank part in the present application; Figure 6 It is the first perspective view of the charging module in the present application; Figure 7 It is the second perspective view of the charging module in the present application; Figure 8 It is Figure 7 It is the enlarged view of A in the present application.

[0020] In the figure: shell 10, power distribution unit 11, liquid cooling tank 12, first magnetic pump 13, first plate heat exchanger 14, water storage tank 16, heat preservation water tank 17, electric water valve 18, air-cooled radiator 22, electrical bin 23, second magnetic pump 24, first water pump 25, second plate heat exchanger 26, relay 27, circuit breaker 28, liquid inlet 29, charging module 30, current sharing pipe 31, shunt through hole 32, liquid outlet 33. DETAILED DESCRIPTION

[0021] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application.

[0022] Example one: As shown in Figure 1 , Figure 2 , Figure 3 and Figure 6 , a charging pile system based on immersed liquid cooling technology and waste heat recovery, comprising a shell 10, a power distribution unit 11 is arranged on the inner side wall of the shell 10, the power distribution unit 11 can safely and efficiently distribute power to the entire charging pile and charge the external truck, a power distribution unit 11 is arranged on one side of the shell 10 inside the shell 10, an electrical bin 23, a relay 27 and a circuit breaker 28 are arranged, forming a safety protection for the normal work of the electronic components in the charging pile, a liquid cooling tank 12 is arranged inside the shell 10, a silicon oil-based coolant is arranged in the liquid cooling tank 12, a charging module 30 is arranged inside the silicon oil-based coolant, the charging module 30 includes an IGBT power unit, a DC / DC converter and a cell group, and the charging module 30 is completely immersed in the silicon oil-based coolant inside the liquid cooling tank 12, so that when the power distribution unit 11 of the charging pile is connected to the truck for charging, the charging module 30 performs omnidirectional three-dimensional heat dissipation inside the silicon oil-based coolant, the heat generated by the charging module 30 is absorbed and replaced by the silicon oil-based coolant inside the liquid cooling tank 12, thereby effectively reducing and maintaining the normal operation of the charging module 30, the silicon oil-based coolant has strong heat conduction performance, and has insulation and flame retardant characteristics, which can effectively protect the charging module 30 while ensuring the normal operation of the charging module 30. It should be noted that the silicon oil-based coolant has a fire-fighting function (ignition point ≥ 300℃), and no additional fire-fighting medium is required.

[0023] Further, as shown in Figure 5 and Figure 7As shown, the upper end side wall of the liquid cooling box 12 is provided with two liquid inlets 33, and the lower end surface of the liquid cooling box 12 is uniformly provided with a plurality of flow equalization channels 31. One side of the plurality of flow equalization channels 31 is communicated with the two liquid inlets 29 on the side wall of the liquid cooling box 12, and the inner side wall of the plurality of flow equalization channels 31 is provided with a plurality of flow distribution holes 32. When the cooling liquid flows back to the inside of the liquid cooling box 12, a large amount of cooling liquid that has been cooled or heat exchanged will enter through the liquid inlet 29, and then be distributed through the flow equalization channel 31 and the divergent backflow of the flow distribution hole 32. When the cooling liquid enters the inside of the liquid cooling box 12, it gradually fills the lower end surface of the liquid cooling box 12, and uniformly backflows through the flow distribution hole 32 in the above process, thereby forming a uniform, comprehensive and three-dimensional cooling effect on the charging module 30 inside the liquid cooling box 12 after the cooled cooling liquid enters the inside of the liquid cooling box 12.

[0024] Further, as shown in Figure 2 and Figure 4 , one side of the liquid cooling box 12 is provided with a first plate heat exchanger 14 inside the shell 10. It should be noted that the plate heat exchanger in this application is an asymmetric channel plate heat exchanger with an internal corrugation angle of 30° and 60° alternately, which can effectively increase the heat exchange efficiency. Each plate heat exchanger 14 has two water cavities due to the need for heat exchange, one of which flows through the cooling liquid, and the other of which flows through the domestic water. The inlet and outlet of the cavity are defined as the first inlet port and the first outlet port in this application, and the inlet and outlet of the cavity flowing through the domestic water are defined as the second inlet port and the second outlet port.

[0025] A second magnetic drive pump 24 is arranged between the first plate heat exchanger 14 and the liquid cooling box 12. The input port of the second magnetic drive pump 24 and the first output port of the first plate heat exchanger 14 are connected by a first connecting pipe, the output port of the second magnetic drive pump 24 and the liquid inlet 29 below the liquid cooling box 12 are connected by a second connecting pipe, and the first liquid inlet of the first plate heat exchanger 14 and the liquid outlet at the top of the liquid cooling box 12 are connected by a third connecting pipe. The third connecting pipe is mainly used to discharge the cooling liquid in the liquid cooling box 12 to the first heat exchanger 14 for cooling treatment. One side of the shell 10 is provided with a heat preservation water tank 17, and the upper side of the heat preservation water tank 17 is provided with a water storage tank 16. The water storage tank 16 and the heat preservation water tank 17 are connected by an electric water valve 18. When the hot water stored in the heat preservation water tank 17 exceeds its capacity, the electric water valve 18 can be opened, so that the excess hot water in the heat preservation water tank 17 can be poured into the water storage tank 16 for storage. It should be noted that the water storage tank 16 only stores cold water inside, and the mixture of cold water and a small amount of hot water will not affect the water temperature in the water storage tank 16.

[0026] The input port of the heat preservation water tank 17 is provided with a first water pump 25, the input port of the first water pump 25 is communicated with the second output port of the first plate heat exchanger 14 through a fourth connecting pipe, the output port of the first water pump 25 is communicated with the water inlet of the heat preservation water tank 17 through a fifth connecting pipe, and the drain port of the water storage tank 16 is connected with the second water inlet port of the first plate heat exchanger 14 through a sixth connecting pipe. It should be noted that the plurality of connecting pipes are only used for liquid transmission between the plurality of liquid driving members and the heat exchange device, and the pipeline structure is more, and only a brief description is made, and the number and diameter of the pipes can be selected by the person skilled in the art according to the actual situation.

[0027] When the charging pile is in low-power operation, the charging module 30 generates heat, so that the temperature of the silicon oil-based coolant in the liquid cooling tank 12 rises to 60-80℃, and then the coolant with a higher temperature flows into the first plate heat exchanger 14 through the third connecting pipe according to the principle of thermal expansion and contraction of the silicon oil-based coolant and the hot liquid floating. Subsequently, the first water pump 25 sucks the cold water in the water storage tank 16 into the first plate heat exchanger 14, and exchanges heat with the high-temperature silicon oil-based coolant flowing into the first plate heat exchanger 14 from the liquid cooling tank 12, so that the water temperature in the first plate heat exchanger 14 rises to 45-60℃ and the coolant temperature drops to 40-50℃. Then the second magnetic pump 24 starts to work, and the second magnetic pump 24 sucks the cooled coolant into the pump body through the first connecting pipe and then discharges the coolant back into the liquid cooling tank 12 through the second connecting pipe, so that the liquid cooling tank 12 can continuously supply coolant and discharge the coolant after absorbing heat, forming a cycle. At this time, the first water pump 25 also works, and the first water pump 25 discharges the water heated in the first plate heat exchanger 14 from the second water outlet to the outside through the fourth connecting pipe, and then circulates to the inside of the heat preservation water tank 17 through the fifth connecting pipe on the output port of the first water pump 25.

[0028] Bathing water: a constant temperature mixing valve is arranged on one side of the heat preservation water tank 17, and the constant temperature mixing valve can be a household bathing mixing valve, wherein the hot water end is connected with the heat preservation water tank 17, the cold water end is connected with the water storage tank 16, the output is adjustable at 45-60℃, and the constant temperature mixing valve supports immediate use; Drinking water: the other side of the heat preservation water tank 17 is provided with an RO reverse osmosis purification module (desalination rate ≥ 99%), a UV sterilization unit and a TDS real-time monitor (threshold value ≤ 50ppm), the water in the heat preservation water tank 17 is purified, the water temperature is kept at 40-45℃, and the purified water is supplied to an external direct drinking machine through an independent pipe, so that the driver of the truck can have bathing and drinking water.

[0029] And the thickness of the heat preservation layer of the heat preservation water tank 17 is greater than or equal to 50 mm, which can ensure that the water temperature fluctuation is less than or equal to ±2℃, and the inside of the heat preservation water tank 17 is provided with an electric auxiliary heating module. When the heating of the charging module 30 is low in winter, the temperature of the silicon oil-based cooling liquid is low, and the overall water temperature of the domestic water in the heat preservation water tank 17 is still low after being converted by the first plate heat exchanger 14, which cannot meet the standard of bathing and drinking, the electric auxiliary heating module will start to heat and supplement the domestic water, which can effectively ensure the water temperature in the heat preservation water tank 17, and further meet the hot water supply demand in low temperature environment.

[0030] Further, as shown in Figure 2 and Figure 4 , the inside of the shell 10 is provided with a second plate heat exchanger 26, and the connection mode of the input end and the output end of the second plate heat exchanger 26 is referred to the communication mode of the first plate heat exchanger 14 and the liquid cooling tank 12 and the heat preservation water tank 17; It should be noted that the first plate heat exchanger 14 and the second plate heat exchanger 26 form two cooling liquid heat exchange circulation systems, which can work independently or synchronously, and can be set according to the charging and cooling demand of the charging pile. During the process of returning the cooling liquid to the inside of the liquid cooling tank 12 through the two plate heat exchangers, the inside and outside of the second connecting pipeline through which the cooling liquid flows is provided with a cooling liquid purity detection module, which can monitor the water quality (TDS, residual chlorine), water temperature and energy consumption data of the cooling liquid. When the cooling liquid purity detection module detects that the cooling liquid purity or other abnormalities, it means that the substances in the battery module may leak and pollute the cooling liquid or other abnormal conditions at this time, so the heat exchange work of the plate heat exchanger in the corresponding system will be stopped at this time, and the second magnetic drive pump 24 on the return branch will also stop working to prevent the cooling liquid diluted by water from flowing back to the inside of the liquid cooling tank 12, causing the short circuit problem of the internal charging module 30. At this time, another set of plate heat exchanger cooling power will be started or increased to exchange heat between the other cooling liquid in the liquid cooling tank 12 and the water in the heat preservation water tank 17, so as to continuously cool the charging module 30 while ensuring that the operator can maintain and replace the damaged heat exchange system under normal operation of the equipment, which can ensure the work efficiency and effectively reduce the short circuit failure of the charging module caused by the purity of the cooling liquid. After the subsequent maintenance personnel repair and replace the corresponding plate heat exchanger and the corresponding branch, the heat exchange work can continue.

[0031] Further, as shown in Figure 2 and Figure 5As shown, the liquid cooling tank 12 is double-layered, the outer layer is a heat preservation layer, and the inner layer is a corrosion-resistant layer, which can effectively form heat preservation effect on the silicon oil-based coolant after absorbing the heat generated by the charging module 30, thereby ensuring that the heat of the silicon oil-based coolant flowing into the first plate heat exchanger 14 will not be quickly dissipated when the external temperature is low.

[0032] Further, the inside of the shell 10 is provided with an intelligent control module, including an edge computing controller, a temperature sensor (PT100), a flow meter (precision ±1%), a water quality monitoring probe, and an Internet of Things communication module (4G / 5G, LoRa). The control logic of the support control module: according to the charging power (P) and the water tank temperature (T), calculate the cooling liquid demand flow according to the formula Q=0.02P+0.5T; when P>200kW, start the second magnetic drive mode, and when P≤200kW, switch to natural convection mode; during the charging peak period, the heat dissipation efficiency of the charging module 30 is preferentially guaranteed, and during the charging low load period, the circulation flow of the cooling liquid in the first plate heat exchanger 14 is reduced, thereby maximizing the heat energy storage of the water in the heat preservation water tank 17, and based on the real-time adjustment of the cooling liquid flow and the water tank temperature by the control module, the dynamic balance between the charging efficiency and the hot water supply is ensured.

[0033] The charging pile system operation process is as follows: Charging and heat dissipation stage: after the heavy truck accesses the charging pile, the charging module 30 starts to work, and the silicon oil-based coolant in the liquid cooling tank 12 absorbs the heat generated during the working process of the charging module 30. When the coolant temperature rises to 60-80℃, if the coolant temperature is high, the coolant itself has the characteristics of thermal expansion and cold contraction, and will expand and then enter the first plate heat exchanger 14 through the third connecting pipeline for heat exchange and cooling. If the expansion and floating of the coolant is limited, the second magnetic drive pump 24 will work, and since the input end of the second magnetic drive pump 24 is in communication with the first output port of the first plate heat exchanger 14, the liquid in the first plate heat exchanger 14 will flow, so that the coolant can be sucked into the plate heat exchanger.

[0034] Heat energy recovery stage: the cold water stored in the water storage tank 16 is transported to the inside of the first plate heat exchanger 14 through the sixth connecting pipeline for heat exchange, and in this process, the first water pump 25 also works continuously, so that the domestic water in the first plate heat exchanger 14 that has been heat exchanged is washed and discharged into the heat preservation water tank 17, and then the hot coolant in the liquid cooling tank 12 is also pumped into the first plate heat exchanger 14 for heat exchange, and the cooled coolant is circulated back to the inside of the liquid cooling tank 12, and the heated water is circulated back to the inside of the heat preservation water tank 17.

[0035] Hot water supply stage: bath water is stored in the heat preservation water tank 17, the driver can use it by scanning the code or APP reservation, among which, according to the specific temperature of the recycled domestic water, for example, if the domestic water is between 60-80℃, it can be used for bathing hot water, without additional heating energy consumption, if the domestic water is only between 40-50℃, it can be used for direct drinking after RO reverse osmosis purification, the drinking water is supplied in real time after flowing out of the heat preservation water tank 17 and purification, the water quality data is uploaded to the cloud monitoring platform, which meets the GB5749 standard. The waste heat is classified and utilized according to the temperature gradient, that is, the high-temperature section is used for bathing, and the medium and low-temperature sections are used for drinking, so that the energy recovery efficiency is maximized, and the opening of the internal electric auxiliary heating module of the heat preservation water tank 17 can be reduced when the hot water temperature is insufficient, which can further reduce energy waste.

[0036] System self-checking and maintenance: the control system automatically performs cooling liquid purity detection (conductivity ≤ 10 μS / cm) every 24 hours; the system detects that the cooling liquid purity is out of standard or the flow is abnormal, triggers an alarm and switches to the second plate heat exchanger 26 to cool the cooling liquid and generate and supply hot water.

[0037] Example two: On the basis of example one, further examples are made, as shown in Figure 2 The top of the shell 10 is provided with an air-cooled radiator 22, which includes a plurality of fans, and a plurality of pipes for liquid flow are arranged on one side of the fan and inside the body, the plurality of pipes can flow hot water, the fan can blow air to the outside of the pipe, so as to perform heat dissipation treatment on the pipe and the hot water inside it, which belongs to the prior art, and will not be described in detail herein, and the input end and the output end are formed outside the pipe.

[0038] A first magnetic drive pump 13 is arranged inside the shell 10 between the air-cooled radiator 22 and the liquid-cooled tank 12, a seventh connecting pipe is arranged in communication between the input end of the first magnetic drive pump 13 and the liquid-cooled tank 12, an eighth connecting pipe is arranged in communication between the output end of the first magnetic drive pump 13 and the input end of the air-cooled radiator 22, and a ninth connecting pipe is arranged in communication between the output end of the air-cooled radiator 22 and the liquid-cooled tank 12. When the water storage tank 16 and the heat preservation water tank 17 have a water shortage problem, the first plate heat exchanger 14 cannot exchange heat between the cooling liquid and the water supplied by the heat preservation water tank 17 at this time, the second magnetic drive pump 24 can be closed and the first magnetic drive pump 13 can be opened, the first magnetic drive pump 13 can suck the high-temperature cooling liquid in the liquid-cooled tank 12 through the seventh connecting pipe, then discharge it into the internal pipe of the air-cooled radiator 22 through the eighth connecting pipe, and the air-cooled radiator 22 can perform heat dissipation treatment on the cooling liquid through the fan, and the cooled cooling liquid can flow back to the inside of the liquid-cooled tank 12 through the output end of the air-cooled radiator 22 and the ninth connecting pipe, so as to ensure the effective cooling treatment of the charging module 30 by the cooling liquid in the liquid-cooled tank 12.

[0039] Finally, it needs to be explained that in the charging pile system based on the immersed liquid cooling technology and waste heat recovery in the present application, the electric water valve, magnetic pump, air-cooled radiator and plate heat exchanger are all purchased on the market, and the technical personnel in the industry only need to install and operate according to the attached instruction manual, without the need for technical personnel in the field to exert creative labor.

[0040] It should be noted that the terms "comprising", "including", or any other variation thereof are intended to cover non-exclusive inclusions, so that the goods or systems including a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such goods or systems. Without more limitations, the element defined by the statement "including a" does not exclude the existence of other identical elements in the goods or systems including the element.

[0041] The above description shows and describes several preferred embodiments of the present application, but as previously described, it should be understood that the present application is not limited to the forms disclosed herein, should not be considered as excluding other embodiments, and can be used in various other combinations, modifications and environments, and can be modified within the scope of the application conceived herein, by the above-mentioned teaching or related technical or knowledge. The modifications and changes made by those skilled in the art without departing from the spirit and scope of the present application shall fall within the scope of protection of the appended claims of the present application.

Claims

1. A charging pile system based on immersion liquid cooling technology and waste heat recovery, comprising a housing (10), wherein a power distribution unit (11) is provided on the inner wall of the housing (10), characterized in that, The housing (10) is equipped with a liquid cooling box (12) filled with coolant. The liquid cooling box (12) is equipped with a charging module (30) which is completely submerged in the coolant inside the liquid cooling box (12). Two sets of heat exchange components are provided on one side of the liquid cooling box (12) inside the housing (10). A water storage component is provided on one side of the housing (10). The liquid cooling box (12) and the two sets of heat exchange components are interconnected to form a circulating heat exchange for the coolant inside the liquid cooling box (12). The two sets of heat exchange components and the water storage component are interconnected to form a circulating heat exchange for the water inside the insulated water tank (17). A coolant purity detection module is provided inside the coolant return pipeline between the two sets of heat exchange components and the liquid cooling box (12). The two sets of heat exchange components can operate simultaneously or independently.

2. The charging pile system based on immersion liquid cooling technology and waste heat recovery according to claim 1, characterized in that, The lower end face of the liquid cooling box (12) is uniformly provided with a plurality of flow equalization pipes (31), and a plurality of flow distribution holes (32) are provided on the inner side wall of the plurality of flow equalization pipes (31). Two liquid inlets (29) are connected to one side of the plurality of flow equalization pipes (31) on the side wall of the liquid cooling box (12), and a liquid outlet (33) is provided above each liquid inlet (29) on the side wall of the shell (10).

3. A charging pile system based on immersion liquid cooling technology and waste heat recovery according to claim 1, characterized in that, The heat exchange assembly includes a first plate heat exchanger (14) disposed inside the housing (10), a second magnetic pump (24) disposed between the first plate heat exchanger (14) and the liquid cooling tank (12), the second magnetic pump (24) forming an accelerated circulation of coolant between the liquid cooling tank (12) and the first plate heat exchanger (14), and a first water pump (25) disposed inside the housing (10) on one side of the first plate heat exchanger (14), the first water pump (25) forming a controlled-speed circulation of water between the water storage assembly and the first plate heat exchanger (14).

4. A charging pile system based on immersion liquid cooling technology and waste heat recovery according to claim 3, characterized in that, The housing (10) is equipped with an intelligent control module, which includes an edge computing controller; a temperature sensor, a flow meter, a water quality monitoring probe; and an Internet of Things communication module.

5. A charging pile system based on immersion liquid cooling technology and waste heat recovery according to claim 4, characterized in that, The control logic of the intelligent control module is as follows: based on the charging power (P) and the water tank temperature (T), the required flow rate of coolant is calculated according to the formula Q=0.02P+0.5T; when P>200kW, the second magnetic pump (24) drive mode is started, and when P≤200kW, the natural convection mode is switched; during the peak charging period, the heat dissipation efficiency of the charging module (30) is prioritized, and during the low-load charging period, the circulation flow of coolant inside the first plate heat exchanger (14) is reduced.

6. A charging pile system based on immersion liquid cooling technology and waste heat recovery according to claim 1, characterized in that, The coolant inside the liquid cooling box (12) is a silicone oil-based coolant with a flash point ≥300℃.

7. A charging pile system based on immersion liquid cooling technology and waste heat recovery according to claim 1, characterized in that, The liquid cooling box (12) is double-layered, with the outer layer being an insulation layer and the inner layer being a corrosion-resistant layer.

8. A charging pile system based on immersion liquid cooling technology and waste heat recovery according to claim 1, characterized in that, The water storage assembly includes an insulated water tank (17) and a water storage tank (16). The input port of the insulated water tank (17) is connected to the first water pump (25), and the water storage tank (16) is connected to the first plate heat exchanger (14). The water storage tank (16) and the insulated water tank (17) are connected to each other through an electric water valve (18). An electric auxiliary heating module is installed inside the insulated water tank (17).

9. A charging pile system based on immersion liquid cooling technology and waste heat recovery according to claim 3, characterized in that, The heat exchange assembly also includes a second plate heat exchanger (26) disposed inside the shell (10). The communication and circulation heat exchange method between the second plate heat exchanger (26), the liquid cooling box (12), and the water storage assembly is the same as that of the first plate heat exchanger (14).

10. A charging pile system based on immersion liquid cooling technology and waste heat recovery according to claim 1, characterized in that, The top of the housing (10) is provided with an air-cooled radiator (22). The input and output ends of the air-cooled radiator (22) are connected to the liquid cooling box (12) by multiple connecting pipes. The return pipe composed of the air-cooled radiator (22) and multiple connecting pipes is provided with a first magnetic pump (13).

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