A charging pile and a thermal management method

Abstract

The application provides a charging pile and a heat management method. The charging pile comprises a driving unit, a charging gun, a first heat dissipation unit, a semiconductor temperature control unit, a liquid storage unit and a control unit connected to the driving unit. The driving unit, the charging gun, the first heat dissipation unit and the liquid storage unit are connected to form a closed first circulation loop. The driving unit, the semiconductor temperature control unit, the first heat dissipation unit and the liquid storage unit are connected to form a closed second circulation loop. The driving unit drives the cooling liquid to flow in the first circulation loop. The first heat dissipation unit exchanges heat between the cooling liquid and the outside. The control unit controls the circulation of the cooling liquid in the second circulation loop. When the cooling liquid circulates in the second circulation loop, the driving unit also drives the cooling liquid to flow in the second circulation loop, and the semiconductor temperature control unit adjusts the temperature of the cooling liquid. The charging efficiency of the charging pile is effectively improved, and the service life of the charging pile is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat management, and particularly relates to a charging pile and a heat management method. BACKGROUND

[0002] With the popularization of new energy vehicles in various regions, the heat management of charging piles in outdoor environments has been a great challenge. In the heat dissipation scheme of traditional charging piles, the cooling liquid flows through the charging gun, various heat generating components inside the charging pile and the heat sink, and then the cooling liquid is forced to flow through the fan of the heat sink for cooling, so as to transfer the heat of the cooling liquid to the outside.

[0003] However, since the charging pile is in an outdoor environment for a long time, the working environments of charging piles in different regions are quite different, and low temperature, high temperature or high humidity can seriously affect the working efficiency and service life of the charging pile. Therefore, the traditional charging pile has been difficult to meet the working requirements in various outdoor environments. Therefore, there is an urgent need for a charging pile that can effectively manage heat in various environments. SUMMARY

[0004] The technical problem to be solved by the application is to provide a charging pile and a heat management method, aiming to solve the problem that the traditional charging pile has been difficult to meet the working requirements in various outdoor environments.

[0005] The application provides a charging pile, which comprises a driving unit, a charging gun, a first heat dissipation unit, a semiconductor temperature control unit, a liquid storage unit and a control unit connected to the driving unit.

[0006] The driving unit, the charging gun, the first heat dissipation unit and the liquid storage unit are connected to form a closed first circulation loop.

[0007] The driving unit, the semiconductor temperature control unit, the first heat dissipation unit and the liquid storage unit are connected to form a closed second circulation loop.

[0008] The driving unit is used to drive the cooling liquid to flow in the first circulation loop.

[0009] The first heat dissipation unit is used to exchange heat between the cooling liquid and the outside world.

[0010] The control unit is used to control the circulation of the cooling liquid in the second circulation loop. When the cooling liquid circulates in the second circulation loop, the driving unit is also used to drive the cooling liquid to flow in the second circulation loop, and the semiconductor temperature control unit is used to adjust the temperature of the cooling liquid.

[0011] Further, the semiconductor temperature control unit comprises a liquid cooling module, a semiconductor refrigeration module and a second heat dissipation unit.

[0012] The liquid cooling module and the second heat dissipation unit are connected to the refrigeration end and the heating end of the semiconductor refrigeration module respectively, and the liquid cooling module is internally used for circulating the cooling liquid in the second circulating loop.

[0013] Further, the charging pile comprises a first chamber and a second chamber, the first heat dissipation unit is arranged in the first chamber, and the second heat dissipation unit and the semiconductor temperature control unit are arranged in the second chamber.

[0014] The application further provides a heat management method of the charging pile as described above, comprising:

[0015] obtaining the working state of the charging pile;

[0016] detecting the temperature information and / or humidity information of the corresponding position of the charging pile according to the working state of the charging pile;

[0017] analyzing the temperature information and humidity information of the corresponding position in the charging pile, and confirming the heat generation category of the charging pile according to the analysis result;

[0018] executing the corresponding working mode according to the heat generation category, wherein in the corresponding working mode, the first heat dissipation unit is arranged in the corresponding switch state, the cooling liquid of the second circulating loop has the corresponding flow, and the semiconductor temperature control unit performs corresponding temperature regulation on the cooling liquid.

[0019] Further, the detection of the temperature information and / or humidity information of the corresponding position of the charging pile according to the working state of the charging pile comprises:

[0020] when the working state of the charging pile is the charging state, detecting the temperature of the tail of the charging gun to obtain a first temperature;

[0021] the analysis of the temperature information and humidity information of the corresponding position in the charging pile, and the confirmation of the heat generation category of the charging pile according to the analysis result, comprise:

[0022] comparing the first temperature with a first preset temperature, and confirming the heat generation category of the charging pile according to the comparison result;

[0023] when the first temperature is less than the first preset temperature, the charging pile is of a first heat generation category, and when the first temperature is greater than or equal to the first preset temperature, the charging pile is of a second heat generation category.

[0024] Further, the execution of the corresponding working mode according to the heat generation category comprises:

[0025] According to the first heat category, a heat dissipation mode is executed, in which the driving unit is opened, the cooling liquid is driven to flow in the first circulation loop, the first heat dissipation unit is opened, the first heat dissipation unit exchanges heat between the cooling liquid and the outside world, the second circulation loop is cut off, and the semiconductor temperature control unit is closed;

[0026] According to the second heat category, an auxiliary refrigeration mode is executed, in which the driving unit is opened, the cooling liquid is driven to flow in the first circulation loop, the first heat dissipation unit is opened, the first heat dissipation unit exchanges heat between the cooling liquid and the outside world, the second circulation loop is in circulation, and the semiconductor temperature control unit heats the cooling liquid.

[0027] Further, the temperature information and / or humidity information of the corresponding position of the charging pile are detected according to the working state of the charging pile, including:

[0028] When the working state of the charging pile is the standby state, the real-time humidity of the air inside the charging pile is detected to obtain the real-time humidity;

[0029] The temperature information and humidity information of the corresponding position of the charging pile are analyzed, and the heat category of the charging pile is confirmed according to the analysis result, including:

[0030] When the real-time humidity is greater than the preset humidity, the heat category of the charging pile is confirmed as the third heat category;

[0031] According to the heat category, a corresponding working mode is executed, including:

[0032] According to the third heat category, a dehumidification mode is executed, in which the driving unit is opened, the cooling liquid is driven to flow in the first circulation loop, the first heat dissipation unit is opened, the first heat dissipation unit exchanges heat between the cooling liquid and the outside world, the second circulation loop is in circulation, and the semiconductor temperature control unit heats the cooling liquid.

[0033] Further, the temperature information and / or humidity information of the corresponding position of the charging pile are detected according to the working state of the charging pile, including:

[0034] When the working state of the charging pile is the standby state, the temperature of the cooling liquid in the liquid storage unit and the cooling liquid temperature of the charging gun are detected to obtain the second temperature and the third temperature, respectively;

[0035] The temperature information and humidity information of the corresponding position of the charging pile are analyzed, and the heat category of the charging pile is confirmed according to the analysis result, including:

[0036] comparing the second temperature with a second preset temperature and the third temperature with a third preset temperature, and determining the heat generation category of the charging pile according to comparison results;

[0037] when the second temperature is less than the second preset temperature, determining the heat generation category of the charging pile as a fourth heat generation category;

[0038] when the third temperature is less than the third preset temperature, determining the heat generation category of the charging pile as a fifth heat generation category;

[0039] the corresponding working mode is executed according to the heat generation category, including:

[0040] a preheating mode is executed according to the fourth heat generation category, in which the driving unit is turned on to drive the coolant to flow in the first circulation loop, the first heat dissipation unit is turned off, the second circulation loop is in circulation, and the semiconductor temperature control unit heats the coolant;

[0041] a heating mode is executed according to the fifth heat generation category, in which the driving unit is turned on to drive the coolant to flow in the first circulation loop, the first heat dissipation unit is turned off, the second circulation loop is in circulation, and the semiconductor temperature control unit heats the coolant, and the flow rate of the second circulation loop in the heating mode is less than that in the preheating mode.

[0042] Further, the temperature information and / or humidity information of the corresponding position of the charging pile is detected according to the working state of the charging pile, including:

[0043] when the working state of the charging pile is the standby state, the ambient temperature is detected to obtain a fourth temperature;

[0044] the temperature information and humidity information of the corresponding position of the charging pile are analyzed, and the heat generation category of the charging pile is determined according to analysis results, including:

[0045] the second temperature is compared with a second preset temperature, and the fourth temperature is compared with a fourth preset temperature, and the heat generation category of the charging pile is determined according to comparison results;

[0046] when the second temperature is greater than the second preset temperature and the fourth temperature is greater than the fourth preset temperature, the heat generation category of the charging pile is determined as a sixth heat generation category;

[0047] the corresponding working mode is executed according to the heat generation category, including:

[0048] According to the sixth heat category, a pre-cooling mode is executed, in which the driving unit is turned on, the cooling liquid flows in the first circulation loop, the first heat dissipation unit is turned off, the second circulation loop is circulated, the semiconductor temperature control unit cools the cooling liquid, and the second circulation loop is set to the maximum circulation.

[0049] Further, the execution of the corresponding working mode according to the heat category includes:

[0050] determining the number of heat categories to which the charging pile conforms;

[0051] when it is confirmed that the charging pile conforms to only one heat category, executing the corresponding working mode according to the heat category;

[0052] when it is confirmed that the charging pile conforms to multiple heat categories, selecting one heat category from the multiple heat categories as a target heat category according to a rule, and executing the corresponding working mode according to the target heat category.

[0053] Compared with the prior art, the charging pile and the heat management method of the charging pile have the following beneficial effects:

[0054] Compared with the conventional charging pile, the charging pile in the application is provided with a first circulation loop and a second circulation loop, the control unit can control the circulation of the second circulation loop, and the semiconductor working unit in the second circulation loop can heat or cool the cooling liquid, so that the charging pile can heat, dissipate heat and dehumidify under different environmental temperature and humidity to enter the best working state, effectively improving the charging efficiency of the charging pile and prolonging the service life of the charging pile. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 is a block diagram of the first circulation loop and the second circulation loop of the charging pile in the embodiment of the application;

[0056] Figure 2 is a schematic diagram of the first circulation loop and the second circulation loop of the charging pile in some embodiments of the application;

[0057] Figure 3 is an exploded view of the structure of the semiconductor temperature control unit in the embodiment of the application;

[0058] Figure 4 is a schematic diagram of the first circulation loop and the second circulation loop of the charging pile in some embodiments of the application;

[0059] Figure 5 is a schematic diagram of the internal structure of the charging gun in some embodiments of the application;

[0060] Figure 6is a structural schematic diagram of a charging pile in some embodiments of the present application;

[0061] Figure 7 is a flow chart of a heat management method of a charging pile in some embodiments of the present application.

[0062] In the drawings, various reference signs represent:

[0063] 100, charging pile; 100a, first chamber; 100b, second chamber;

[0064] 1, drive unit; 2, water outlet water separator; 3, charging gun; 31, positive copper plate; 32, negative copper plate; 33, positive gun tail terminal; 34, negative gun tail terminal; 35, positive lead; 36, negative lead; 37, positive cooling pipe; 38, negative cooling pipe; 4, water return water separator; 5, first heat dissipation unit; 51, first radiator; 52, first fan; 6, semiconductor temperature control unit; 61, liquid cooling module; 62, semiconductor refrigeration module; 63, second heat dissipation unit; 631, heat dissipation profile; 632, second fan; 64, heat insulation assembly; 7, liquid storage unit; 8, valve assembly; 9, partition. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0066] With the popularization of new energy vehicles in various regions, the heat management of charging piles in outdoor environments has been a great challenge. In the heat dissipation scheme of traditional charging piles, the cooling liquid flows through the charging gun, the internal heating components of the charging pile and the radiator, and then the cooling liquid is forced to flow through the fan of the radiator to cool the cooling liquid, so as to transfer the heat of the cooling liquid to the outside.

[0067] However, since the charging pile is in an outdoor environment for a long time, the working environments of charging piles in different regions differ greatly, and low temperature, high temperature or high humidity can seriously affect the working efficiency and service life of the charging pile. The heat dissipation scheme of the traditional charging pile has certain limitations, that is, whether it is an air-cooled charging pile or a liquid-cooled charging pile, the temperature inside the traditional charging pile on the market is often higher than the ambient temperature, and in a high humidity or high temperature difference environment, dew will gather inside the charging pile to trigger a short circuit failure of the internal components of the charging pile.

[0068] In the technical field, the dehumidification of the charging pile usually includes two schemes. The core idea of the first scheme is to dehumidify by heating, but on the one hand, heating dehumidification may increase the energy consumption of the charging pile, the charging pile overheats, and the moisture cannot be effectively removed, which affects the long-term stability and service life of the charging pile. On the other hand, heating dehumidification is difficult to dehumidify fundamentally. When the heating of the charging pile ends, the temperature inside the charging pile gradually decreases. If the ambient temperature drops suddenly at this time, the condensate water will be re-adsorbed into the charging pile under the alternating cold and hot conditions, which will affect the internal devices of the charging pile.

[0069] The core idea of the second scheme is to dehumidify by refrigeration, so that the temperature inside the charging pile is lower than the ambient temperature, the water vapor inside the charging pile is changed into condensate water and discharged, so as to reduce the humidity inside the charging pile. Common refrigeration methods include compressor refrigeration and semiconductor refrigeration. The structure of compressor refrigeration is complex, the cost is high, and the volume of the compressor is often large, which is difficult to miniaturize. It is difficult to install a compressor, a condenser and an evaporator in the charging pile. Therefore, few charging pile products on the market use compressor refrigeration. Semiconductor refrigeration does not have moving parts such as compressors, pumps or fans, has a small size and high reliability, can quickly change the direction of refrigeration or heating by changing the direction of the input current, and is suitable for solving the thermal management problem of the charging pile. However, semiconductor refrigeration also has obvious shortcomings. The refrigeration capacity of the semiconductor is small. In the working condition of 35℃, the refrigeration capacity of the semiconductor refrigeration air conditioner is 200W, which is much larger than the volume of the gun head of the charging gun. The heat dissipation of the common liquid-cooled charging gun is usually greater than 2kW or 3kW. Due to the above reasons, the charging pile in the related art rarely uses semiconductor refrigeration.

[0070] Therefore, if a charging pile using semiconductor refrigeration installs semiconductor refrigeration pieces and liquid cooling plates and other components inside the gun head of the charging gun, and absorbs the heat generated by the charging gun during operation through semiconductor refrigeration, the semiconductor refrigeration pieces must be installed in the charging gun, which inevitably sacrifices the refrigeration capacity of the semiconductor, making it difficult to achieve effective refrigeration while the gun head of the charging gun is difficult to be lightweight. Moreover, the utilization rate of the semiconductor refrigeration plate installed inside the gun head of the charging gun is low, and the cold energy generated by refrigeration is not evenly distributed in the charging pile.

[0071] In this embodiment, a charging pile is designed to effectively solve the above problems and keep the charging pile in the best working condition.

[0072] Please refer to Figures 1 to 4 A charging pile, the charging pile comprising a driving unit 1, a charging gun 3, a first heat dissipation unit 5, a semiconductor temperature control unit 6, a liquid storage unit 7, and a control unit connected to the driving unit 1;

[0073] The driving unit 1, the charging gun 3, the first heat dissipation unit 5 and the liquid storage unit 7 are connected to form a closed first circulation loop;

[0074] The driving unit 1, the semiconductor temperature control unit 6, the first heat dissipation unit 5 and the liquid storage unit 7 are connected to form a closed second circulation loop;

[0075] The driving unit 1 is configured to drive the cooling liquid to flow in the first circulation loop;

[0076] The first heat dissipation unit 5 is configured to exchange heat between the cooling liquid and the outside;

[0077] The control unit is configured to control the circulation of the cooling liquid in the second circulation loop, when the cooling liquid circulates in the second circulation loop, the driving unit 1 is further configured to drive the cooling liquid to flow in the second circulation loop, and the semiconductor temperature control unit 6 is configured to adjust the temperature of the cooling liquid.

[0078] In this embodiment, compared with the traditional charging pile, the charging pile in this embodiment is provided with a first circulation loop and a second circulation loop at the same time, the control unit can control the circulation of the second circulation loop, and the semiconductor working unit in the second circulation loop is used to heat or cool the cooling liquid, so that the charging pile can be heated, cooled and dehumidified to enter the best working state under different environmental temperature and humidity, thereby effectively improving the charging efficiency of the charging pile and prolonging the service life of the charging pile.

[0079] Preferably, as shown in Figure 3 and 4 The semiconductor temperature control unit 6 comprises a liquid cooling module 61, a semiconductor refrigeration module 62 and a second heat dissipation unit 63;

[0080] The liquid cooling module 61 and the second heat dissipation unit 63 are respectively connected to the refrigeration end and the heating end of the semiconductor refrigeration module 62, the inside of the liquid cooling module 61 is used to circulate the cooling liquid in the second circulation loop, and the semiconductor refrigeration module 62 can switch the refrigeration end and the heating end according to the change of the current direction.

[0081] The semiconductor refrigeration module 62 is a semiconductor sheet, as known, the semiconductor sheet is alternately arranged by p-type and n-type semiconductor materials, when the current passes through the junction of the two different semiconductor materials, heat transfer will occur, so that one end of the semiconductor sheet relatively arranged absorbs heat as the refrigeration end, and the other end releases heat as the heating end. When the current direction flowing into the semiconductor sheet is reversed, the refrigeration end and the heating end of the semiconductor refrigeration module 62 can be exchanged.

[0082] The inside of the liquid cooling module 61 has a cooling liquid flow channel, in the second circulation loop, the cooling liquid circulates along the cooling liquid flow channel. Preferably, the cooling liquid flow channel is continuously bent, the extension length of the cooling liquid flow channel is increased by bending, thereby increasing the contact surface area between the cooling liquid and the liquid cooling module 61, and the speed of heat transfer from the liquid cooling module 61 to the cooling liquid is improved.

[0083] As shown in Figure 3 Preferably, the semiconductor temperature control unit 6 further comprises a heat insulation assembly 64, the second heat dissipation unit 63 comprises a heat dissipation profile 631 and a second fan 632, the liquid cooling module 61 and the heat dissipation profile 631 are connected to the refrigeration end and the heating end of the semiconductor refrigeration module 62 respectively, and the second fan 632 is arranged on the side of the heat dissipation profile 631 away from the semiconductor refrigeration module 62.

[0084] The side of the heat dissipation profile 631 away from the semiconductor refrigeration module 62 is in a fin structure, the heat dissipation profile 631 is used for guiding the heat generated by the heating end of the semiconductor refrigeration module 62 out, and through forced convection of the second fan 632, the heat of the heat dissipation profile 631 can be quickly spread to the charging pile. It can be understood that, since the refrigeration end and the heating end of the semiconductor refrigeration module 62 can be switched according to the direction of power-on, when the end of the semiconductor refrigeration module 62 connected to the heat dissipation profile 631 changes from the heating end to the refrigeration end, the heat dissipation profile 631 can also transfer the cold generated by the semiconductor refrigeration module 62, and the second fan 632 can blow the cold transferred by the heat dissipation profile 631 to the charging pile.

[0085] Preferably, as shown in Figure 3 In the direction from the refrigeration end to the heating end of the semiconductor refrigeration module 62, the semiconductor refrigeration module 62 is within the projection of the liquid cooling module 61 and the heat dissipation profile 631. The semiconductor refrigeration module 62 is a plurality of semiconductor refrigeration pieces, the heat insulation assembly 64 is arranged between the liquid cooling module 61 and the heat dissipation profile 631, and the heat insulation assembly 64 surrounds the side wall of the semiconductor refrigeration module 62.

[0086] The heat insulation assembly 64 and the side wall of the semiconductor refrigeration module 62 are filled with a silicon-based heat conductor, such as heat-conducting silicone, heat-conducting silicone grease, etc., which can effectively reduce the thermal resistance between the semiconductor refrigeration module 62 and the heat dissipation profile 631, and realize efficient heat transfer between the semiconductor refrigeration module 62 and the heat dissipation profile 631. The heat dissipation profile 631 is made of metal or metal alloy material, and in this embodiment, the heat dissipation profile 631 is made of aluminum profile.

[0087] The charging piles on the market often pay more attention to the thermal runaway of the gun head of the charging gun 3 and ignore the thermal runaway of the gun tail of the charging gun 3. The present application focuses on the thermal runaway problem of the gun tail of the copper-coated liquid charging gun, as shown in Figure 5As shown in the internal structure diagram of the copper-coated liquid charging gun, the charging gun 3 includes a positive electrode part and a negative electrode part, wherein the positive electrode part includes a positive electrode copper plate 31, a positive electrode tail end terminal 33 and a positive electrode wire 35 connected in sequence, and further includes a positive electrode cooling pipe 37 stripped from the positive electrode wire 35, which is connected to the liquid cooling circulation loop of the charging pile. It can be understood that the positive electrode cooling pipe 37 and the positive electrode wire 35 are jointly wrapped in an insulating material to form part of the cable of the charging pile. In this embodiment, only the positive electrode part is exemplified, and the negative electrode part of the charging gun 3 is the same as the positive electrode part, which will not be described here. According to Figure 5 It can be seen that the positive electrode copper plate 31, the positive electrode tail end terminal 33 and part of the positive electrode wire 35 connected to the positive electrode tail end terminal 33 are lack of cooling pipes. This is because in the related art, the connection between the tail of the charging gun and the copper plate is narrow in space, and most of the charging gun wires can only pass through, the cooling pipe inside the charging gun needs to be stripped from the charging gun wire, and the cooling pipe will be drawn out from the tail of the charging gun and connected to the first circulation loop. The wire at the connection between the tail of the charging gun and the copper plate inevitably lacks cooling liquid cooling. In order to avoid the overlength of the wire lacking cooling liquid cooling, the cooling pipe stripped in the related art is relatively short, so that the bending radius of the connection between the cooling pipe and the first circulation loop is very small, and the stress is concentrated at the bending part. If the installation angle of the cooling pipe deviates slightly during the installation of the charging pile, the charging pile is easy to expose the cooling pipe, or the pipe is folded, which seriously affects the durability and reliability of the pipe of the circulation loop and increases the flow resistance of the cooling liquid.

[0088] In summary, in the thermal management of the traditional charging pile, the wire at the tail of the charging gun 3 is not only one of the most overheated parts, but also the installation of the cooling pipe at the tail of the charging gun 3 is relatively complex, which directly affects the durability of the pipe of the circulation loop. The commonly used technical means in the art is to load a forced air cooling device at the tail of the charging gun 3, and to blow away the heat at the tail of the charging gun 3, the copper plate and the shunt through forced convection cooling of the air cooling device. However, this design has a high risk, and has high design requirements for the direction of air flow and the stacking of heat generating devices. The tail of the charging gun 3 is often wrapped with metal wires through an insulating layer, and the insulating layer will melt and fail under high temperature. Therefore, the heat dissipation problem of the tail of the charging gun 3 needs to be solved urgently.

[0089] Preferably, a cold air pipe is arranged in the charging pile, the air outlet of the second heat dissipation unit 63 is connected to the air inlet of the cold air pipe, and the air outlet of the cold air pipe faces the connection between the tail of the charging gun 3 and the copper plate; the second heat dissipation unit 63 is used to generate air flow, the air flow passes through the cold air pipe, carries the cooling capacity conducted by the heat dissipation profile 631, and makes the connection between the tail of the charging gun 3 and the copper plate achieve heat dissipation.

[0090] Furthermore, the charging station is also equipped with multiple temperature detection units, which are used to detect at least the temperature of the charging gun's tail.

[0091] Preferably, a first temperature sensor is provided at the tail of the charging gun 3;

[0092] The first temperature sensor is used to detect the first temperature at the tail of the charging gun 3;

[0093] The control unit is used to compare the first temperature with the first preset temperature, and control the flow of coolant in the second circulation loop according to the comparison result and the working status of the charging pile.

[0094] When the charging station is in operation and the first temperature is lower than the first preset temperature, the coolant does not circulate in the second circulation loop.

[0095] When the charging pile is in operation and the first temperature is greater than or equal to the first preset temperature, or when the charging pile is in standby mode, coolant flows in the second circulation loop.

[0096] like Figure 2 As shown, in this embodiment, the first sensor is set at the tail of the charging gun 3 to detect the first temperature of the tail of the charging gun 3; the control unit can control the flow of coolant in the second circulation loop according to the temperature of the tail of the charging gun 3. Compared with the thermal management of traditional charging piles, this setting can detect the temperature of the tail of the charging gun 3, solve the heat dissipation problem of the tail of the charging gun 3, and effectively prevent the tail of the charging gun 3 from overheating.

[0097] Specifically, when the charging pile is in the charging state (the state in which the charging pile supplies power to external devices), the charging pile includes two working modes: heat dissipation mode and auxiliary cooling mode.

[0098] A. Cooling Mode

[0099] When the charging station is in operation and its initial temperature is lower than a first preset temperature, the charging station falls under the first heat generation category and enters a heat dissipation mode. Specifically, the charging station's operation in heat dissipation mode is as follows:

[0100] like Figure 2 As shown, drive unit 1 is turned on, drive unit 1 drives coolant to flow in the first circulation loop, and first heat dissipation unit 5 is turned on, first heat dissipation unit 5 makes coolant exchange heat with the outside.

[0101] The control module controls the second circulation loop to be cut off, the semiconductor temperature control unit 6 is turned off, and the second heat dissipation module is turned off.

[0102] B. Auxiliary Cooling Mode

[0103] When the charging station is in operation and the first temperature is greater than or equal to the first preset temperature, the charging station falls under the second heat generation category and executes the auxiliary cooling mode. Specifically, the operation process of the charging station in auxiliary cooling mode is as follows:

[0104] like Figure 2 As shown, drive unit 1 is turned on, drive unit 1 drives coolant to flow in the first circulation loop, and first heat dissipation unit 5 is turned on, first heat dissipation unit 5 enables coolant to exchange heat with the outside.

[0105] The control module controls the flow of coolant in the second circulation loop, and the drive unit 1 also drives the coolant to flow in the second circulation loop. The control module controls the semiconductor temperature control unit 6 to heat the coolant, and the second heat dissipation unit 63 is turned on, which dissipates the cold energy at the cooling end of the semiconductor temperature control unit 6.

[0106] Furthermore, the charging station also includes a humidity detection unit whose signal is connected to the control unit;

[0107] The humidity detection unit is used to detect the real-time humidity of the air inside the charging pile;

[0108] Specifically, in the standby state of the charging pile, the charging pile includes multiple working modes, one of which is the dehumidification mode.

[0109] C. Dehumidification mode

[0110] When the charging station is in standby mode, the real-time humidity is greater than the preset humidity, and the time interval between the last dehumidification is greater than or equal to the preset interval, the charging station's heat generation category is the third heat generation category, and the charging station executes dehumidification mode. Specifically, the working process of the charging station in dehumidification mode is as follows:

[0111] like Figure 2 As shown, drive unit 1 is turned on, drive unit 1 drives coolant to flow in the first circulation loop, and first heat dissipation unit 5 is turned on, first heat dissipation unit 5 enables coolant to exchange heat with the outside.

[0112] The control module controls the flow of coolant in the second circulation loop, and the drive unit 1 also drives the coolant to flow in the second circulation loop. The control module controls the semiconductor temperature control unit 6 to heat the coolant, and the second heat dissipation unit 63 is turned on. The second heat dissipation unit 63 diffuses the cold energy from the cooling end of the semiconductor temperature control unit 6 to the tail of the charging gun 3 or the inside of the charging pile.

[0113] At this time, the surface temperature of the cooling end of the semiconductor temperature control unit 6 is lower than the dew point temperature of the external environment (i.e., the temperature at which water vapor in the air begins to condense). The moisture in the air condenses on the cold surface of the semiconductor temperature control unit 6 to form condensate. The condensate is discharged to the outside of the charging pile, thereby achieving dehumidification of the charging pile.

[0114] Further, as shown in Figure 6 the charging pile 100 includes a first chamber 100a and a second chamber 100b, the first heat dissipation unit 5 is arranged in the first chamber 100a, and the second heat dissipation unit 63 and the semiconductor temperature control unit 6 are arranged in the second chamber 100b.

[0115] In the embodiment, Figure 6 is a schematic view of the structure of the charging pile when the door of the charging pile is opened, wherein the inside of the charging pile 100 is divided into a first chamber 100a and a second chamber 100b by a partition 9, the first chamber 100a is provided with a ventilation hole, the ventilation hole allows the first chamber 100a to communicate with the atmosphere outside the charging pile, and the first heat dissipation unit 5 can enhance the heat exchange efficiency through natural convection or a fan, thereby more effectively dissipating the heat generated by the high-power charging pile.

[0116] The first heat dissipation unit 5 includes a first radiator 51 and a first fan 52, the cooling liquid flows through the first radiator 51, and the first fan 52 forcibly convects the heat of the first radiator 51 to the outside. It can be understood that in each working mode of the charging pile, the opening or closing of the first heat dissipation unit 5 refers to the opening or closing of the first fan 52, for example, in the preheating mode, the first heat dissipation unit 5 is closed, and the specific process is that the cooling liquid flows through the first radiator 51, and the first fan 52 is closed to stop the forced convection cooling of the cooling liquid in the first radiator 51.

[0117] The second chamber 100b is a closed chamber. On the one hand, the second chamber 100b is isolated from the outside, and the second chamber 100b can be sealed by moisture-proof mud or sealant to isolate the condensed water from entering the inside of the charging pile; on the other hand, the second chamber 100b is separated from the first chamber 100a to reduce the mutual interference of heat between the two chambers, so that the semiconductor temperature control unit 6 can efficiently cool or heat; in addition, the closed arrangement of the second chamber 100b can also reduce the entry of dust and impurities into the inside of the charging pile, reduce the risk of damage to the charging pile, and improve the service life of the charging pile.

[0118] In other embodiments, under suitable circumstances, the second chamber 100b can be communicated with the first chamber 100a or directly with the atmosphere according to different use requirements. It can be understood that the closed chamber of the second chamber 100b is a preferred embodiment which can isolate the condensed water from entering the charging pile,

[0119] The phenomenon of condensate water generated inside the charging pile usually occurs in an environment with high humidity or large temperature fluctuation. When the internal temperature of the charging pile is higher than the dew point temperature of the external environment (i.e. the temperature at which water vapor in the air begins to condense), the moisture in the air may condense on the cold surface inside the charging pile, forming condensate water. For example, when the charging pile is working, the internal temperature rises, but the external environment has high humidity, and condensate water may form on the surface of the heat sink or the circulating loop which has a lower temperature.

[0120] From the working process of the dehumidification mode of the charging pile, it can be known that the power-on makes the one end of the semiconductor refrigeration module 62 towards the liquid cooling module 61 as the heating end, and the one end of the semiconductor refrigeration module 62 close to the second heat dissipation unit 63 as the refrigeration end. The heating end of the semiconductor refrigeration module 62 transfers heat to the cooling liquid in the liquid cooling module 61, and through the circulating flow of the cooling liquid in the second circulating loop, the cooling liquid with a higher temperature flows through the first heat dissipation unit 5, and the first heat dissipation unit 5 forcibly convects and cools, so that the heat transferred to the first heat dissipation unit 5 is diffused to the air. The refrigeration end of the semiconductor refrigeration module 62 transfers cold to the second heat dissipation unit 63, and the second heat dissipation unit 63 diffuses the cold to the air, so that the moisture in the air condenses on the surface of the second heat dissipation unit 63 to form condensate water.

[0121] Preferably, a water collecting device and a drainage channel connected to the water collecting device are arranged in the second chamber. The condensate water can be collected into the water collecting device and then discharged to the outside of the charging pile through the drainage channel.

[0122] The charging pile is placed in an outdoor environment, and in addition to high humidity and large temperature difference environments, it will also face different outdoor environments. In addition to the heat dissipation mode, the auxiliary refrigeration mode and the dehumidification mode of the charging pile in the embodiment, it can also be used to deal with various complex environments.

[0123] Generally speaking, the lower the temperature of the cooling liquid, the greater the heat dissipation temperature difference Δt, which is more conducive to the heat dissipation of the charging gun 3 and the cable of the charging gun 3. However, when using insulating oil such as silicone oil as the cooling liquid, the viscosity of the cooling liquid will greatly increase at low temperature, and the flow resistance of the cooling liquid in each circulating loop will greatly increase. In the case that the pump pressure of the driving unit 1 applied to the cooling liquid remains unchanged, the flow rate m of the insulating oil such as silicone oil as the cooling liquid will greatly decrease at low temperature.

[0124] According to the formula Q = C * m * Δt, although the heat dissipation temperature difference Δt is improved, the flow rate m decreases more obviously, and the specific heat capacity C remains unchanged. Therefore, when using insulating oil such as silicone oil as the cooling liquid in a low temperature environment, the overall heat dissipation efficiency of the charging pile decreases instead. At this time, the temperature of the cooling liquid needs to be raised to the optimal temperature range through heating, so as to ensure the heat dissipation effect of the charging gun 3 and the cable.

[0125] Therefore, further, the liquid storage unit 7 is provided with a second temperature sensor, the second temperature sensor is used for detecting the temperature of the cooling liquid in the liquid storage unit 7, and a second temperature is obtained;

[0126] The control unit is used for comparing the second temperature with a second preset temperature, and controlling the working state of the first heat dissipation unit 5, the flow of the cooling liquid in the second circulating loop, and the temperature of the cooling liquid adjusted by the semiconductor temperature control unit 6 according to the comparison result, wherein the second preset temperature is an optimal working temperature of the cooling liquid determined through experiments.

[0127] Preferably, the second circulating loop further comprises a valve assembly 8, and the valve assembly 8 and the semiconductor temperature control unit 6 are arranged in sequence along the flow direction of the cooling liquid.

[0128] The control unit is used for controlling the opening degree of the valve assembly 8 to change the flow of the cooling liquid in the second circulating loop.

[0129] Preferably, as shown in Figure 2 the valve assembly 8 is an electromagnetic valve with adjustable opening degree, and the control unit can control the opening degree of the valve assembly 8 to open or close the valve assembly 8, and the valve assembly 8 can be opened to a preset opening degree, so as to control the flow of the cooling liquid in the second circulating loop.

[0130] It should be understood that the valve assembly 8 using the electromagnetic valve with adjustable opening degree is only a preferred solution, and in another embodiment, as shown in Figure 4 the electromagnetic valve with full opening or full closing can also be used as a lower alternative of the preferred solution, the valve assembly 8 comprises a first electromagnetic valve and a second electromagnetic valve, the first electromagnetic valve is connected in series with the semiconductor temperature control unit 6 and connected in parallel with the charging gun 3, and the second electromagnetic valve is connected in parallel with the semiconductor temperature control unit 6 and connected in series with the charging gun 3, so that the cost of the valve assembly 8 can be saved.

[0131] Specifically, in the charging pile standby state, one of the various working modes of the charging pile is a preheating mode.

[0132] D. Preheating mode

[0133] When the charging pile is in the standby state and the second temperature is lower than the second preset temperature, the charging pile is in the fourth heating category, and the charging pile executes the preheating mode. Specifically, the working process of the charging pile in the preheating mode is as follows:

[0134] As shown in Figure 2 the driving unit 1 is opened, the driving unit 1 drives the cooling liquid to flow in the first circulating loop, and the control module controls the first heat dissipation unit 5 to be closed;

[0135] The control module controls the valve assembly 8 to be opened to a first preset opening degree, so that the cooling liquid in the second circulating loop flows.

[0136] The driving unit 1 also drives the cooling liquid to flow in the second circulation loop, the control module controls the semiconductor temperature control unit 6 to heat the cooling liquid, and the second heat dissipation unit 63 is turned on. The second heat dissipation unit 63 diffuses the cold energy of the refrigeration end of the semiconductor temperature control unit 6 to the gun tail of the charging gun 3 or the inside of the charging pile.

[0137] The preheating mode of the charging pile in the embodiment is safe and reliable. In the related art, the charging pile is preheated by a heating tube. Since the temperature of the core of the heating tube is very high, even if it is a PTC ceramic heating tube, the temperature of the core of the heating tube is greater than 200℃, which is higher than the flash point of most cooling liquids such as silicon oil. When the silicon oil does not completely immerse the heating tube, the silicon oil and air are mixed together, and the electric heating greatly increases the risk of spontaneous combustion of the silicon oil. In the present application, the semiconductor heating is adopted. When the air inlet of the refrigeration end of the semiconductor temperature control unit 6 is about 0℃, even if the cooling liquid does not flow, the temperature of the cooling liquid of the heating end of the semiconductor temperature control unit 6 is usually not higher than 60℃, which is much lower than the flash point of the silicon oil, thereby eliminating the risk of spontaneous combustion.

[0138] Compared with electric heating, the heating efficiency of the semiconductor temperature control unit 6 is higher. The efficiency of high-efficiency electric heating is usually only 0.95-0.98, while the efficiency of semiconductor heating, which belongs to a kind of heat pump, is always greater than 1. Although the heating power of semiconductor heating is only a few hundred watts, in severe cold regions, the charging pile may be in a preheating state for 24 hours, and a large amount of power consumption is required. The adoption of semiconductor preheating can greatly improve the heating efficiency and reduce the operating cost of the charging pile.

[0139] In the embodiment, the second heat dissipation unit 63 preferably diffuses the cold energy of the refrigeration end of the semiconductor temperature control unit 6 to the gun tail of the charging gun 3. That is, the second heat dissipation unit 63 transmits the airflow carrying the cold energy to the gun tail of the charging gun 3 through the cold air pipeline arranged in the charging pile. In this way, the cold energy is prevented from diffusing to the inside of the charging pile or the cable of the charging gun 3, effectively solving the adverse effects of the semiconductor temperature control module on the cooling liquid caused by the refrigeration at one end and the heating at the other end. The cooling liquid is not disturbed by the cold energy while being heated, thereby ensuring the heat dissipation efficiency of the charging pile.

[0140] As shown in Figure 2 Since the driving unit 1, the charging gun 3, the first heat dissipation unit 5, and the liquid storage unit 7 are connected to form a closed first circulation loop, and the driving unit 1, the semiconductor temperature control unit 6, the first heat dissipation unit 5, and the liquid storage unit 7 are connected to form a closed second circulation loop, it can be known that the semiconductor temperature control unit 6 is connected in parallel with the charging gun 3, and the semiconductor temperature control unit 6 is a branch.

[0141] The cable of the charging gun 3 is connected between the charging gun 3 and other units in the first circulating loop, and the length of the cable of the charging gun 3 is much longer than the length of the cooling liquid pipeline between other units in the first circulating loop or the second circulating loop. Therefore, it can be understood that, for the entire first circulating loop, the branch in which the semiconductor temperature control unit 6 is located is relatively short, that is, the cooling liquid flow channel inside the liquid cooling module 61 is also relatively short. Therefore, the flow resistance of the cooling liquid in the cooling liquid flow channel inside the liquid cooling module 61 is obviously smaller than the flow resistance of the cooling liquid inside the charging gun 3 and the cable of the charging gun 3, and the cooling liquid flow in the liquid cooling module 61 is much larger than the cooling liquid flow in the charging gun 3 and the cable of the charging gun 3, which is equivalent to that most of the cooling liquid in the first circulating loop and the second circulating loop only circulates in the second circulating loop. The circulating loop thus arranged can ensure that the heat loss of the cooling liquid is minimized. Preferably, in the embodiment, the first preset opening degree is full opening of the valve assembly 8, which further increases the cooling liquid flow in the liquid cooling module 61.

[0142] Further, since the sheath of the cable of the charging gun 3 is usually made of rubber material, the rubber will harden at low temperature and become difficult to bend, which makes it difficult to pull, bend and plug the charging gun 3 and the cable, greatly affecting the user experience. In general, the critical temperature at which the sheath of the cable of the charging gun 3 hardens at low temperature is lower than the critical temperature at which the insulating oil such as silicone oil as the cooling liquid becomes viscous. For example, at an ambient temperature of 0°C, the sheath of the charging gun 3 can still be bent to a certain extent, while the viscosity of the silicone oil has already seriously affected the cooling liquid flow in the circulating loop. As described above, the conditions for starting the preheating mode of the charging pile include that the second temperature is lower than the second preset temperature, wherein the second preset temperature is the best working temperature of the cooling liquid determined through experiments. The critical temperature at which the cable of the charging gun 3 hardens at low temperature is the third preset temperature, which is usually lower than the second preset temperature. When it is detected that the temperature of the cable of the charging pile is lower than the third preset temperature, since the cooling liquid flow in the liquid cooling module 61 is much larger than the cooling liquid flow in the charging gun 3 and the cable of the charging gun 3 in the preheating mode of the charging pile, the preheating mode of the charging pile cannot meet the demand for heating the cable of the charging pile.

[0143] To meet the demand for heating the cable of the charging pile, further, the third temperature sensor is arranged at the gun head of the charging gun 3 and / or the liquid return port of the charging gun 3 and / or the liquid outlet port of the charging gun 3, and the third temperature sensor is used to detect the temperature of the gun head of the charging gun 3 and / or the liquid return port of the charging gun 3 and / or the liquid outlet port of the charging gun 3, to obtain the third temperature.

[0144] The control unit is configured to compare the third temperature with a third preset temperature, and control the working state of the first heat dissipation unit 5, the flow of the cooling liquid in the second circulation loop, and the temperature of the cooling liquid adjusted by the semiconductor temperature control unit 6 according to the comparison result, wherein the third preset temperature is less than the second preset temperature, and the third preset temperature is the critical temperature of the cable low-temperature hardening of the charging gun 3 after testing.

[0145] Preferably, as shown in Figure 2 The charging pile further comprises a water outlet water separator 2 and a water return water separator 4, the driving unit 1, the water outlet water separator 2, the charging gun 3, the water return water separator 4, the first heat dissipation unit 5 and the liquid storage unit 7 are connected to form a closed first circulation loop, and the third temperature sensor is arranged on the water outlet water separator 2 of the charging gun 3 and / or the water return water separator 4 of the charging gun 3.

[0146] Specifically, in the standby state of the charging pile, one of the plurality of working modes is a heating mode.

[0147] E. Heating mode

[0148] When the charging pile is in the standby state and the third temperature is lower than the third preset temperature, the charging pile is in the fifth heating category, and the charging pile executes the heating mode. Specifically, the working process of the charging pile in the heating mode is as follows:

[0149] As shown in Figure 2 The driving unit 1 is turned on, the driving unit 1 drives the cooling liquid to flow in the first circulation loop, and the control module controls the first heat dissipation unit 5 to be closed;

[0150] The control module controls the valve assembly 8 to be opened to a second preset opening degree, so that the cooling liquid in the second circulation loop flows, wherein the second preset opening degree is less than the first preset opening degree;

[0151] The driving unit 1 also drives the cooling liquid to flow in the second circulation loop, the control module controls the semiconductor temperature control unit 6 to heat the cooling liquid, the second heat dissipation unit 63 is turned on, and the second heat dissipation unit 63 diffuses the cold energy of the refrigeration end of the semiconductor temperature control unit 6 to the gun tail of the charging gun 3 or the inside of the charging pile.

[0152] The difference between the heating mode and the preheating mode is that the opening degree of the valve assembly 8 is different, the first preset opening degree of the valve assembly 8 in the preheating mode is full opening, the second preset opening degree of the valve assembly 8 in the heating mode is less than the first preset opening degree, and the flow of the cooling liquid in the branch where the semiconductor temperature control unit 6 is located in the heating mode is less than that in the preheating mode., which means that most of the cooling liquid in the first circulation loop and the second circulation loop circulates in the first circulation loop, and the heated cooling liquid passes through the charging gun 3 and the cable of the charging gun 3, which can effectively solve the low-temperature hardening of the cable of the charging gun 3.

[0153] Further, asFigure 2 As shown, the air inlet of the first heat dissipation unit 5 is equipped with a fourth temperature sensor, which is used to detect the ambient temperature and obtain a fourth temperature.

[0154] The control unit is used to control the working state of the first heat dissipation unit 5, the flow rate of the coolant in the second circulation loop, and the temperature of the coolant by the semiconductor temperature control unit 6 based on the comparison results of the second temperature and the second preset temperature, and the comparison results of the fourth temperature and the fourth preset temperature, wherein the fourth preset temperature is greater than the second preset temperature.

[0155] F. Pre-cooling mode

[0156] When the charging station is in standby mode, and the second temperature exceeds the second preset temperature, and the fourth temperature exceeds the fourth preset temperature, the charging station enters the sixth heating mode and executes the pre-cooling mode. Specifically, the working process of the charging station in pre-cooling mode is as follows:

[0157] like Figure 2 As shown, drive unit 1 is turned on, and drive unit 1 drives the coolant to flow in the first circulation loop, while the control module controls the first heat dissipation unit 5 to be turned off.

[0158] The control module controls the valve assembly 8 to open to the first preset opening degree, so that the coolant in the second circulation loop flows at the maximum flow rate;

[0159] The drive unit 1 also drives the coolant to flow in the second circulation loop. The control module controls the semiconductor temperature control unit 6 to cool the coolant. The second heat dissipation unit 63 is turned on and the second heat dissipation unit 63 convectively cools the heat from the heating end of the semiconductor temperature control unit 6.

[0160] In the first few minutes after a charging station begins supplying power to a new energy vehicle, it often needs to provide a charging current much larger than its rated current for a short period to enable ultra-high-power fast charging. However, due to thermal management limitations of charging stations, most charging stations cannot maintain ultra-high-power fast charging for more than 10 minutes. The output power of the charging station gradually decreases over time, causing the supply current to gradually decay. In this embodiment, the pre-cooling mode of the charging station enables the charging station to store cold water in standby mode. This ensures that once the charging station enters charging mode, the stored low-temperature coolant prevents the charging gun cables from overheating rapidly, thereby extending the ultra-high-power fast charging time and greatly improving the user experience.

[0161] Taking an actual application scenario as an example, the charging pile can continuously maintain 500A charging for more than 30 minutes without overheating when supplying power to a new energy vehicle, but it is difficult to maintain 600A super-power charging for 10 minutes. Usually, the charging pile enters a power reduction state after about 6 minutes of super-power charging of the new energy vehicle, and the charging current is continuously reduced from 600A, 500A to 300A. After the pre-cooling mode of the charging pile in the embodiment is adopted, the charging pile accumulates cold in the standby state, and the stored low-temperature coolant can prevent the cable of the charging gun from rapidly heating up after the charging pile enters the charging state. The time of the charging pile for super-power charging of the new energy vehicle can be extended from 6 minutes to 10 minutes, greatly improving the user experience and increasing the charging efficiency and heat dissipation efficiency of the charging pile. It should be noted that the above actual application scenario is only an example of the charging pile supplying power to a new energy vehicle, and the charging pile in the present application is not limited to supplying power to a new energy vehicle, nor is it limited to providing the charging current in the example.

[0162] Preferably, the first preset opening degree is the maximum opening degree of the valve assembly 8. Since the branch in which the semiconductor temperature control unit 6 is located is short, the internal cooling liquid flow channel of the liquid cooling module 61 is also short, and the first preset opening degree is the maximum opening degree of the valve assembly 8, the cooling liquid flow in the liquid cooling module 61 is much larger than the cooling liquid flow in the charging gun 3 and the cable of the charging gun 3, which is equivalent to that most of the cooling liquid in the first circulating loop and the second circulating loop only circulates in the second circulating loop, ensuring that the cooling liquid has minimal loss of cold energy.

[0163] It should be noted that the charging pile can be simultaneously provided with a humidity detection unit, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor, or only one or more of them, and the control module controls the charging pile to be in the corresponding working mode according to the information detected by the humidity detection unit, the second temperature sensor, the third temperature sensor, and the fourth temperature sensor. Each working mode has a different application scenario, and the opening conditions of each mode are usually not interfered with each other in most geographical areas and different natural environments.

[0164] For example, the application scenario of the dehumidification mode of the charging pile is a high-humidity environment. Generally, when the ambient temperature is less than 30°C, the real-time humidity is greater than the preset humidity, and the dehumidification mode of the charging pile can be triggered. The fourth preset temperature is preferably set to 35°C. When the ambient temperature is greater than 35°C, the pre-cooling mode of the charging pile is triggered, and the dehumidification mode also needs to meet the condition that the time from the last dehumidification is greater than the preset interval to be started. Therefore, the triggering conditions of the pre-cooling mode and the dehumidification mode in actual application usually do not conflict. In special working conditions, if the working conditions of the pre-cooling mode and the dehumidification mode are met at the same time, the charging pile preferentially performs the dehumidification mode to preferentially ensure the safety of the internal devices of the charging pile. The special working condition is that the charging pile has just completed high-current fast charging for a short time and the ambient temperature has dropped sharply.

[0165] In the embodiment, the second preset temperature is greater than the third preset temperature, which is only an example. In most cases, in order to ensure the normal operation of the charging pile, the person skilled in the art has a better choice for the material of the cooling liquid and the cable of the charging gun 3, wherein the optimal working temperature of the cooling liquid is greater than the critical temperature of the low-temperature hardening of the cable of the charging gun 3. The present application does not limit the size between the second preset temperature and the third preset temperature. If there is a conflict between the second preset temperature and the third preset temperature, such as the third preset temperature being greater than or equal to the second preset temperature, the control module preferentially makes the charging pile operate in the preheating mode. This is because the heating mode is mainly for heating the cable of the charging gun 3, and the gun tail of the charging gun 3 is one of the components of the charging pile that is most prone to overheating, and the heat dissipation of the charging gun 3 needs to be preferentially ensured. The heating mode and the preheating mode of the charging pile do not conflict.

[0166] It should be further pointed out that, as shown in Figure 2 In the embodiment, in the direction of the cooling liquid flowing through the first circulation loop: the driving unit 1, the water outlet water separator 2, the charging gun 3, the water return water separator 4, the first heat dissipation unit 5 and the liquid storage unit 7 are connected in sequence. It can be understood that in other embodiments, in the direction of the cooling liquid flowing through the first circulation loop, the liquid storage unit 7, the driving unit 1 and the first heat dissipation module can be exchanged in order, for example, in the direction of the cooling liquid flowing through the first circulation loop: the liquid storage unit 7, the water outlet water separator 2, the charging gun 3, the water return water separator 4, the first heat dissipation unit 5 and the driving unit 1 are connected in sequence, or the liquid storage unit 7, the water outlet water separator 2, the charging gun 3, the water return water separator 4, the driving unit 1 and the first heat dissipation unit 5 are connected in sequence.

[0167] In addition, the charging pile in the embodiment can be an integrated charging pile or a split charging pile. The integrated charging pile has a charging module integrated inside, and a plurality of split charging piles are externally connected to a charging module.

[0168] As shown in Figure 7As shown, the embodiment also provides a heat management method applied to the charging pile, comprising:

[0169] Step 701, obtaining the working state of the charging pile;

[0170] Step 702, detecting the temperature information and / or humidity information of the corresponding position of the charging pile according to the working state of the charging pile;

[0171] Step 703, analyzing the temperature information and humidity information of the corresponding position in the charging pile, and confirming the heat category of the charging pile according to the analysis result;

[0172] Step 704, executing the corresponding working mode according to the heat category, wherein in the corresponding working mode, the first heat dissipation unit sets the corresponding switch state, the second circulating loop cooling liquid has the corresponding flow, and the semiconductor temperature control unit adjusts the temperature of the cooling liquid.

[0173] Preferably, the flow of the second circulating loop cooling liquid is controlled by a valve assembly, and the valve assembly is opened or closed, and the valve assembly can also be opened to a preset opening degree.

[0174] Further, according to the working state of the charging pile, the temperature information and / or humidity information of the corresponding position of the charging pile are detected, comprising:

[0175] When the working state of the charging pile is the charging state, the temperature of the tail of the charging gun is detected to obtain the first temperature;

[0176] Analyzing the temperature information and humidity information of the corresponding position in the charging pile, and confirming the heat category of the charging pile according to the analysis result, comprising:

[0177] Comparing the first temperature with the first preset temperature, and confirming the heat category of the charging pile according to the comparison result;

[0178] When the first temperature is less than the first preset temperature, the charging pile is of the first heat category, and when the first temperature is greater than or equal to the first preset temperature, the charging pile is of the second heat category.

[0179] According to the heat category, the corresponding working mode is executed, comprising:

[0180] According to the first heat category, the heat dissipation mode is executed, in which the driving unit is opened, the cooling liquid flows in the first circulating loop, the first heat dissipation unit is opened, the first heat dissipation unit exchanges heat between the cooling liquid and the outside, the second circulating loop is cut off, and the semiconductor temperature control unit is closed;

[0181] The auxiliary refrigeration mode is executed according to the second heat generation category, in the auxiliary refrigeration mode, the driving unit is opened, the cooling liquid is driven to flow in the first circulation loop, the first heat dissipation unit is opened, the first heat dissipation unit exchanges heat between the cooling liquid and the outside world, the second circulation loop is circulated, and the semiconductor temperature control unit heats the cooling liquid.

[0182] Further, according to the working state of the charging pile, the temperature information and / or humidity information of the corresponding position of the charging pile are detected, including:

[0183] When the working state of the charging pile is the standby state, the real-time humidity of the air inside the charging pile is detected to obtain the real-time humidity;

[0184] The temperature information and humidity information of the corresponding position of the charging pile are analyzed, and the heat generation category of the charging pile is confirmed according to the analysis result, including:

[0185] When the real-time humidity is greater than the preset humidity, the heat generation category of the charging pile is confirmed as the third heat generation category;

[0186] According to the heat generation category, a corresponding working mode is executed, including:

[0187] The dehumidification mode is executed according to the third heat generation category, in the dehumidification mode, the driving unit is opened, the cooling liquid is driven to flow in the first circulation loop, the first heat dissipation unit is opened, the first heat dissipation unit exchanges heat between the cooling liquid and the outside world, the second circulation loop is circulated, and the semiconductor temperature control unit heats the cooling liquid.

[0188] Preferably, the dehumidification mode is executed according to the third heat generation category, including:

[0189] According to the third heat generation category, it is judged whether the charging pile satisfies the dehumidification condition, if the charging pile satisfies the dehumidification condition, the dehumidification mode is executed, otherwise the dehumidification mode is not executed;

[0190] The dehumidification condition is that the time interval from the last execution of the dehumidification mode of the charging pile is greater than the preset interval duration.

[0191] Further, according to the working state of the charging pile, the temperature information and / or humidity information of the corresponding position of the charging pile are detected, including:

[0192] When the working state of the charging pile is the standby state, the temperature of the cooling liquid in the liquid storage unit and the cooling liquid temperature of the charging gun are detected to obtain the second temperature and the third temperature respectively;

[0193] The temperature information and humidity information of the corresponding position of the charging pile are analyzed, and the heat generation category of the charging pile is confirmed according to the analysis result, including:

[0194] The second temperature is compared with the second preset temperature, and the third temperature is compared with the third preset temperature, and the heat generation category of the charging pile is confirmed according to the comparison result;

[0195] confirming that the heat generation category of the charging pile is a fourth heat generation category when the second temperature is less than a second preset temperature;

[0196] confirming that the heat generation category of the charging pile is a fifth heat generation category when the third temperature is less than a third preset temperature;

[0197] executing a corresponding working mode according to the heat generation category, including:

[0198] executing a preheating mode according to the fourth heat generation category, in the preheating mode, the driving unit is turned on to drive the coolant to flow in the first circulation loop, the first heat dissipation unit is turned off, the second circulation loop is in circulation, and the semiconductor temperature control unit heats the coolant;

[0199] executing a heating mode according to the fifth heat generation category, in the heating mode, the driving unit is turned on to drive the coolant to flow in the first circulation loop, the first heat dissipation unit is turned off, the second circulation loop is in circulation, the semiconductor temperature control unit heats the coolant, and the flow rate of the second circulation loop in the heating mode is less than that in the preheating mode.

[0200] Specifically, the coolant temperature of the charging gun is detected to obtain the third temperature, wherein the coolant temperature of the charging gun is the temperature of the coolant passing through the gun head of the charging gun 3, the liquid return port of the charging gun 3, or the liquid outlet port of the charging gun 3. According to the corresponding description of the charging pile in the first part of the embodiment, it can be known that the coolant temperature of the liquid return port of the charging gun 3 can be obtained by detecting the coolant temperature passing through the water return distributor, and the coolant temperature of the liquid outlet port of the charging gun 3 can be obtained by detecting the coolant temperature passing through the water outlet distributor.

[0201] Further, according to the working state of the charging pile, the temperature information and / or humidity information of the corresponding position of the charging pile are detected, including:

[0202] When the working state of the charging pile is the standby state, the ambient temperature is detected to obtain the fourth temperature;

[0203] The temperature information and humidity information of the corresponding position of the charging pile are analyzed, and the heat generation category of the charging pile is confirmed according to the analysis result, including:

[0204] The second temperature is compared with the second preset temperature, and the fourth temperature is compared with the fourth preset temperature, and the heat generation category of the charging pile is confirmed according to the comparison result;

[0205] When the second temperature is greater than the second preset temperature and the fourth temperature is greater than the fourth preset temperature, it is confirmed that the heat generation category of the charging pile is a sixth heat generation category;

[0206] A corresponding working mode is executed according to the heat generation category, including:

[0207] The pre-cooling mode is executed according to the sixth heating category, in the pre-cooling mode, the driving unit is turned on, the cooling liquid flows in the first circulation loop, the first heat dissipation unit is turned off, the second circulation loop is circulated, the semiconductor temperature control unit cools the cooling liquid, and the second circulation loop is set to the maximum circulation.

[0208] Further, the corresponding working mode is executed according to the heating category, including:

[0209] The number of heating categories that the charging pile meets is determined.

[0210] When it is confirmed that the charging pile meets only one heating category, the corresponding working mode is executed according to the heating category.

[0211] When it is confirmed that the charging pile meets multiple heating categories, one heating category is selected as a target heating category from the multiple heating categories according to a heating category execution rule, and the corresponding working mode is executed according to the target heating category.

[0212] The heating category execution rule is a category ordering rule of the heating categories, and one heating category is selected as a target heating category from the multiple heating categories according to the heating category execution rule, including:

[0213] When it is confirmed that the charging pile meets at least a third heating category and a sixth heating category from the multiple heating categories at the same time, or meets at least a fourth heating category and a fifth heating category at the same time, the third heating category or the fourth heating category is selected as the target heating category.

[0214] The reason for such setting is that in special working conditions, if the working conditions of the pre-cooling mode and the dehumidification mode are met at the same time, the dehumidification mode is preferred for the charging pile, and the safety of the devices inside the charging pile is preferentially guaranteed. The heating mode is mainly to heat the cable of the charging gun 3, and the tail of the charging gun 3 is one of the components of the charging pile that is most prone to overheating, and the heat dissipation of the charging gun 3 needs to be preferentially guaranteed, so the preheating mode is preferentially selected, and the heating mode and the preheating mode of the charging pile do not conflict.

[0215] Further, after the dehumidification mode is executed according to the third heating category, it further includes:

[0216] The working state of the charging pile and the working duration of the dehumidification mode are detected.

[0217] The working state of the charging pile and the working duration of the dehumidification mode are analyzed, and whether to exit the dehumidification mode is determined according to the analysis result.

[0218] When the working state of the charging pile is a charging state, and / or the working duration of the dehumidification mode is greater than or equal to a preset dehumidification duration, the charging pile exits the dehumidification mode.

[0219] Further, after executing the preheating mode according to the fourth heating category, the method further comprises:

[0220] detecting a real-time temperature of the cooling liquid in the liquid storage unit to obtain a first real-time temperature;

[0221] detecting a working state of the charging pile;

[0222] analyzing the working state of the charging pile and the first real-time temperature, and determining whether to exit the preheating mode according to an analysis result;

[0223] when the working state of the charging pile is a charging state, and / or the first real-time temperature is greater than or equal to a fifth preset temperature, the charging pile exits the preheating mode, wherein the fifth preset temperature is a sum of the second preset temperature and a first hysteresis temperature.

[0224] Setting the first hysteresis temperature can avoid frequent preheating mode and save operation cost.

[0225] Further, after executing the heating mode according to the fifth heating category, the method further comprises:

[0226] detecting a real-time temperature of the cooling liquid in the liquid storage unit to obtain a first real-time temperature;

[0227] detecting a working state of the charging pile;

[0228] analyzing the working state of the charging pile and the first real-time temperature, and determining whether to exit the preheating mode according to an analysis result;

[0229] when the working state of the charging pile is a charging state, and / or the first real-time temperature is greater than or equal to a fifth preset temperature, the charging pile exits the preheating mode, wherein the fifth preset temperature is a sum of the second preset temperature and a first hysteresis temperature.

[0230] Setting the first hysteresis temperature can avoid frequent preheating mode and save operation cost.

[0231] Further, after executing the preheating mode according to the fourth heating category, the method further comprises:

[0232] detecting a real-time temperature of the cooling liquid in the liquid storage unit to obtain a first real-time temperature;

[0233] detecting a working state of the charging pile;

[0234] analyzing the working state of the charging pile and the first real-time temperature, and determining whether to exit the preheating mode according to an analysis result;

[0235] when the working state of the charging pile is a charging state, and / or the first real-time temperature is greater than or equal to a fifth preset temperature, the charging pile exits the preheating mode, wherein the fifth preset temperature is a sum of the second preset temperature and a first hysteresis temperature.

[0236] The charging pile and the heat management method provided by the application have at least the following advantages:

[0237] (1) The heat management of the tail of the charging gun 3 can control the temperature of the tail of the charging gun 3 within a reasonable range, avoiding the risk of overheating of the tail of the charging gun 3;

[0238] (2) The cooling pipe at the tail of the charging gun 3 can be avoided from being collapsed, effectively improving the durability and reliability of the cooling pipe;

[0239] (3) By adjusting the flow of the semiconductor temperature control unit 6 and the second circulating loop, the energy efficiency ratio of heating or refrigeration is high, and the operation cost of the charging pile is reduced;

[0240] (4) The charging pile has a dehumidification function, and the charging pile is divided into multiple cavities, part of which is sealed, which can reduce the risk of short circuit of the internal devices of the charging pile;

[0241] (5) The charging pile has the ability of heat dissipation and cooling in the working state and standby state, especially the pre-cooling mode of the charging pile can cope with the risk of thermal runaway caused by short-time large-current power supply, effectively increasing the maximum charging power of the charging pile.

[0242] It should be understood that the heat management method of the charging pile in the embodiment is applied to the charging pile described in the embodiment, and the specific steps of the method are described in the charging pile part of the embodiment. The method and other parts of the embodiment are corresponding and can produce similar technical effects. Herein, no further description is given.

[0243] The above only describes the preferred embodiments of the application, and does not limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A method of thermal management of a charging station, characterized in that, The charging pile comprises a driving unit, a charging gun, a first heat dissipation unit, a semiconductor temperature control unit, a liquid storage unit and a control unit connected to the driving unit; the driving unit, the charging gun, the first heat dissipation unit and the liquid storage unit are connected to form a closed first circulation loop; the driving unit, the semiconductor temperature control unit, the first heat dissipation unit and the liquid storage unit are connected to form a closed second circulation loop; the driving unit is used to drive the cooling liquid to flow in the first circulation loop; the first heat dissipation unit is used to exchange heat between the cooling liquid and the outside world; the control unit is used to control the circulation of the cooling liquid in the second circulation loop, when the cooling liquid circulates in the second circulation loop, the driving unit is also used to drive the cooling liquid to flow in the second circulation loop, and the semiconductor temperature control unit is used to adjust the temperature of the cooling liquid; the heat management method comprises: obtaining the working state of the charging pile; when the working state of the charging pile is in standby state, detecting the real-time humidity of the air inside the charging pile to obtain the real-time humidity; analyzing the temperature information and humidity information of the corresponding positions in the charging pile, and confirming the heat category of the charging pile according to the analysis result, including: when the real-time humidity is greater than the preset humidity, confirming that the heat category of the charging pile is the third heat category; according to the heat category, a corresponding working mode is executed, wherein in the corresponding working mode, the first heat dissipation unit sets a corresponding switch state, the second circulation loop cooling liquid sets a corresponding flow, and the semiconductor temperature control unit adjusts the temperature of the cooling liquid accordingly; the third heat category, in the dehumidification mode, the driving unit is turned on to drive the cooling liquid to flow in the first circulation loop, the first heat dissipation unit is turned on, the first heat dissipation unit exchanges heat between the cooling liquid and the outside world, the second circulation loop circulates, and the semiconductor temperature control unit heats the cooling liquid.

2. The method of thermal management of a charging station of claim 1, wherein, The semiconductor temperature control unit comprises a liquid cooling module, a semiconductor refrigeration module and a second heat dissipation unit; The liquid cooling module and the second heat dissipation unit are connected to the refrigeration end and the heating end of the semiconductor refrigeration module respectively, the liquid cooling module is used to circulate the cooling liquid in the second circulation loop, and the semiconductor refrigeration module can switch the refrigeration end and the heating end according to the change of the power supply direction.

3. The method of thermal management of a charging station of claim 2, wherein, The charging pile comprises a first chamber and a second chamber, the first heat dissipation unit is arranged in the first chamber, and the second heat dissipation unit and the semiconductor temperature control unit are arranged in the second chamber.

4. The method of thermal management of a charging station of claim 1, wherein, According to the working state of the charging pile, the temperature information and humidity information of the corresponding positions in the charging pile are detected, including: when the working state of the charging pile is in charging state, the temperature of the tail of the charging gun is detected to obtain the first temperature; the analysis of the temperature information and humidity information of the corresponding positions in the charging pile, and the confirmation of the heat category of the charging pile according to the analysis result, including: comparing the first temperature with a first preset temperature, and determining the heat category of the charging pile according to a comparison result; when the first temperature is less than the first preset temperature, the charging pile is of a first heat category; and when the first temperature is greater than or equal to the first preset temperature, the charging pile is of a second heat category.

5. The method of thermal management of a charging station of claim 4, wherein, the corresponding working mode is executed according to the heat category, including: a heat dissipation mode is executed according to the first heat category, in which the driving unit is turned on to drive the cooling liquid to flow in the first circulation loop, the first heat dissipation unit is turned on to exchange heat between the cooling liquid and the outside, the second circulation loop is cut off, and the semiconductor temperature control unit is turned off; an auxiliary refrigeration mode is executed according to the second heat category, in which the driving unit is turned on to drive the cooling liquid to flow in the first circulation loop, the first heat dissipation unit is turned on to exchange heat between the cooling liquid and the outside, the second circulation loop is in communication, and the semiconductor temperature control unit heats the cooling liquid.

6. The method of thermal management of a charging station of claim 5, wherein, the temperature information and the humidity information of the corresponding positions in the charging pile are detected according to the working state of the charging pile, including: when the working state of the charging pile is the standby state, the temperature of the cooling liquid in the liquid storage unit and the cooling liquid temperature of the charging gun are detected to obtain a second temperature and a third temperature respectively; the temperature information and the humidity information of the corresponding positions in the charging pile are analyzed, and the heat category of the charging pile is determined according to an analysis result, including: the second temperature is compared with a second preset temperature, and the third temperature is compared with a third preset temperature, and the heat category of the charging pile is determined according to a comparison result; when the second temperature is less than the second preset temperature, the heat category of the charging pile is determined to be a fourth heat category; when the third temperature is less than the third preset temperature, the heat category of the charging pile is determined to be a fifth heat category; the corresponding working mode is executed according to the heat category, including: a preheating mode is executed according to the fourth heat category, in which the driving unit is turned on to drive the cooling liquid to flow in the first circulation loop, the first heat dissipation unit is turned off, the second circulation loop is in communication, and the semiconductor temperature control unit heats the cooling liquid; a heating mode is executed according to the fifth heat category, in which the driving unit is turned on to drive the cooling liquid to flow in the first circulation loop, the first heat dissipation unit is turned off, the second circulation loop is in communication, and the semiconductor temperature control unit heats the cooling liquid, and the flow of the second circulation loop in the heating mode is less than that in the preheating mode.

7. The method of thermal management of a charging station of claim 6, wherein, the temperature information and the humidity information of the corresponding positions in the charging pile are detected according to the working state of the charging pile, including: when the working state of the charging pile is the standby state, an ambient temperature is detected to obtain a fourth temperature; the temperature information and the humidity information of the corresponding positions in the charging pile are analyzed, and the heat category of the charging pile is determined according to an analysis result, including: The second temperature is compared with a second preset temperature, the fourth temperature is compared with a fourth preset temperature, and a heat generation category of the charging pile is determined according to a comparison result; When the second temperature is greater than the second preset temperature and the fourth temperature is greater than the fourth preset temperature, it is determined that the heat generation category of the charging pile is a sixth heat generation category; The corresponding working mode is executed according to the heat generation category, including: According to the sixth heat generation category, a pre-cooling mode is executed, in which the driving unit is turned on to drive the coolant to flow in the first circulation loop, the first heat dissipation unit is closed, the second circulation loop is in circulation, the semiconductor temperature control unit cools the coolant, and the second circulation loop is set to the maximum flow capacity.

8. The method of thermal management of a charging station of claim 1, wherein, The corresponding working mode is executed according to the heat generation category, including: The number of heat generation categories to which the charging pile conforms is determined; When it is determined that the charging pile conforms to only one heat generation category, the corresponding working mode is executed according to the heat generation category; When it is determined that the charging pile conforms to multiple heat generation categories, one heat generation category is selected as a target heat generation category from the multiple heat generation categories according to a heat generation category execution rule, and the corresponding working mode is executed according to the target heat generation category.

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