Charging pile

Abstract

A charging pile (100), comprising a main circuit (20) and a heating branch circuit (40). A charger cable (10) and a liquid storage tank (21) are provided on the main circuit. The heating branch circuit is connected in series with the main circuit. The charging pile improves the convenience of use in a low-temperature environment.

Description

charging pile

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application No. 202422623676.8, entitled "Charging Pile," filed on October 29, 2024, with the China National Intellectual Property Administration, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of charging pile technology, and in particular to a charging pile. Background Technology

[0004] To address the travel anxiety associated with new energy vehicles, many manufacturers have launched 500kW, 600kW, and 800kW supercharging stations, further improving charging speeds. To address the thermal runaway issue during supercharging, liquid cooling methods are being adopted to dissipate heat from the charging gun and cables.

[0005] In related technologies, when charging piles operate in low-temperature environments, such as -32℃ or lower, the surface of the charging gun wires may freeze in low-temperature rain and snow, causing the wires to become stiff and making it inconvenient for users to unplug the charging gun, resulting in a poor user experience.

[0006] Public content

[0007] This disclosure aims to address at least one of the technical problems existing in the prior art. To this end, one object of this disclosure is to provide a charging station that can achieve low-temperature heating, thereby improving reliability and user experience.

[0008] A charging pile according to an embodiment of the present disclosure includes: a main circuit, on which a charging gun and a liquid storage tank are provided; and a heating branch circuit, which is connected in series with the main circuit.

[0009] Therefore, by setting up a heating branch circuit and connecting it in series with the main circuit, the heating branch circuit can be connected to the main circuit when the charging pile is working in a low-temperature environment. This allows the heating coolant to heat the charging gun wire, melting and softening the wire, making it easier for users to operate.

[0010] In some examples of this disclosure, a pump body is also provided on the trunk line.

[0011] In some examples of this disclosure, the pump body is located between the outlet of the reservoir and the gun line.

[0012] In some examples of this disclosure, a heating element is also provided on the main road.

[0013] In some examples of this disclosure, the heating element is located between the outlet of the liquid storage tank and the gun wire.

[0014] In some examples of this disclosure, the charging station further includes a cooling branch connected in series with the main circuit, the cooling branch being equipped with a radiator, and the heating branch connected in parallel with the cooling branch.

[0015] In some examples of this disclosure, a valve assembly is provided on the heating branch for controlling the heating branch and the cooling branch to be connected in parallel.

[0016] In some examples of this disclosure, the charging station further includes a shunt branch connected in parallel with the charging gun wire for diverting coolant into the charging gun wire.

[0017] In some examples of this disclosure, the first end of the shunt branch is connected between the reservoir and the gun line, and the second end of the shunt branch is connected to the reservoir.

[0018] In some examples of this disclosure, a heating element and a pump body are also provided on the main line, with the heating element disposed between the liquid storage tank and the pump body.

[0019] In some examples of this disclosure, the first end of the shunt branch is connected between the pump body and the gun wire.

[0020] In some examples of this disclosure, there are multiple gun wires connected in parallel.

[0021] In some examples of this disclosure, the trunk line includes a first trunk line and a second trunk line, and the plurality of gun lines include a first gun line and a second gun line. The first trunk line and the second trunk line are connected in parallel. The first trunk line is connected in series with the cooling branch, the heating branch and the liquid storage tank. The second trunk line is connected in series with the cooling branch, the heating branch and the liquid storage tank. The first gun line is located on the first trunk line, and the second gun line is located on the second trunk line.

[0022] In some examples of this disclosure, a diverter is also provided on the main line, the diverter is disposed between the pump body and the gun line, the first end of the diverter branch is connected to the diverter, and the diverter is disposed in the first main line and the second main line.

[0023] In some examples of this disclosure, a combiner is also provided on the trunk line, and the combiner is provided in the first trunk line and the second trunk line.

[0024] In some examples of this disclosure, the second end of the branch is connected to the combiner.

[0025] In some examples of this disclosure, the charging station further includes: a first pressure sensor disposed in the first main circuit and located between the shunt and the first charging gun line; and a second pressure sensor disposed in the second main circuit and located between the shunt and the second charging gun line.

[0026] In some examples of this disclosure, the charging station further includes a third pressure sensor disposed within the shunt.

[0027] In some examples of this disclosure, the charging pile further includes: a first temperature sensor disposed in the first main circuit and located between the first charging gun line and the combiner; and a second temperature sensor disposed in the second main circuit and located between the second charging gun line and the combiner.

[0028] In some examples of this disclosure, the charging pile further includes: a first flow sensor disposed on the first trunk line and located between the first charging port and the combiner; and a second flow sensor disposed on the second trunk line and located between the second charging port and the combiner.

[0029] In some examples of this disclosure, the charging pile further includes: a first one-way valve, which is disposed in the first main circuit and located between the splitter and the first charging line, and the first one-way valve only allows coolant to flow to the first charging line; and a second one-way valve, which is disposed in the second main circuit and located between the splitter and the second charging line, and the second one-way valve only allows coolant to flow to the second charging line.

[0030] In some examples of this disclosure, the charging pile further includes: a third one-way valve disposed on the first main circuit and located between the first charging gun line and the combiner, the third one-way valve allowing coolant to flow only to the combiner; and a fourth one-way valve disposed on the second main circuit and located between the second charging gun line and the combiner, the fourth one-way valve allowing coolant to flow only to the combiner.

[0031] In some examples of this disclosure, a third temperature sensor is also provided inside the reservoir, the third temperature sensor being adapted to detect the temperature of the coolant entering the reservoir.

[0032] In some examples of this disclosure, a level gauge is provided inside the liquid storage tank, the level gauge being adapted to detect the liquid level height of the coolant in the liquid storage tank.

[0033] In some examples of this disclosure, the charging pile further includes a heating element, and a heat exchanger is provided on the main line, through which coolant exchanges heat with the heating element to cool the heating element.

[0034] In some examples of this disclosure, the heat exchanger is spaced apart on the side of the gun wire away from the reservoir.

[0035] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0036] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0037] Figure 1 is a schematic diagram of a charging pile according to an embodiment of the present disclosure;

[0038] Figure 2 is a schematic diagram of a charging pile in a low-temperature start-up state according to an embodiment of the present disclosure;

[0039] Figure 3 is a schematic diagram of a charging pile in a low-temperature heating state according to an embodiment of the present disclosure;

[0040] Figure 4 is a schematic diagram of a charging pile in a single-pump failure state according to an embodiment of the present disclosure;

[0041] Figure 5 is a schematic diagram of a charging pile according to another embodiment of the present disclosure;

[0042] Figure 6 is a schematic diagram of a charging pile according to another embodiment of the present disclosure;

[0043] Figure 7 is a schematic diagram of a charging pile according to yet another embodiment of the present disclosure.

[0044] Reference numerals: 100, Charging pile; 10, Gun line; 11, First gun line; 12, Second gun line; 20, Main circuit; 201, First main circuit; 202, Second main circuit; 21, Storage tank; 2101, Replenishment port; 23, Heating element; 24, Pump body; 241, First pump body; 242, Second pump body; 25, Diverter; 26, Filter element; 261, First filter element; 262, Second filter element; 27, Combiner; 28, Heat exchanger element; 281, First heat exchanger element; 282, Second heat exchanger element; 29. First pressure sensor; 210. Second pressure sensor; 211. Third pressure sensor; 212. First temperature sensor; 213. Second temperature sensor; 214. First flow sensor; 215. Second flow sensor; 216. First check valve; 217. Second check valve; 218. Third check valve; 219. Fourth check valve; 220. Third temperature sensor; 221. Level gauge; 224. First pressure and temperature sensor; 225. Second pressure and temperature sensor; 30. Cooling branch; 31. Radiator; 311. Fan; 312. Drain valve; 40. Heating branch; 41. Valve assembly; 50. Heating element; 51. First heating element; 52. Second heating element; 60. Flow branch; 61. First end; 62. Second end. Detailed Implementation

[0045] The embodiments of this disclosure are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0046] The charging pile 100 according to an embodiment of the present disclosure is described below with reference to Figures 1-7.

[0047] Referring to Figures 1, 3, 5, and 6, the charging pile 100 according to this disclosure mainly includes a main circuit 20 and a heating branch circuit 40. The main circuit 20 is equipped with a charging gun 10 and a liquid storage tank 21, and the heating branch circuit 40 is connected in series with the main circuit 20.

[0048] Specifically, the charging station 100 charges the vehicle via a charging gun, and a charging cable 10 connects the charging gun and the charging station 100. When the charging station 100 operates in low-temperature environments, such as at an ambient temperature of -32°C or lower, the surface of the charging cable 10 may freeze in low-temperature rain and snow, causing the charging cable 10 to become stiff and inconvenient for users to unplug the charging gun.

[0049] By setting up the main circuit 20, the liquid storage tank 21 on the main circuit 20 can be used to store and supply coolant. By setting up the heating branch circuit 40, the heating branch circuit 40 is connected in series with the main circuit 20. In this way, when the charging pile 100 is working in a low-temperature environment, the heating branch circuit 40 can be connected to the main circuit 20, so that the coolant can enter the liquid storage tank 21 through the heating branch circuit 40. Thus, the gun wire 10 can be heated by heating the coolant, which realizes the low-temperature heating function of the charging pile 100, melts the ice on the surface of the gun wire 10 and makes the gun wire 10 soft, making it easier for the user to operate.

[0050] In low-temperature environments, the charging gun line 10 can be pre-melted and softened via the main circuit 20 and heating branch circuit 40 by using pre-arranged charging information or other signals that indicate the user's charging needs. This reduces the user's waiting time, facilitates operation, and improves the user experience.

[0051] Therefore, by setting up a heating branch 40 and connecting it in series with the main circuit 20, the charging pile 100 can connect the heating branch 40 and the main circuit 20 when working in a low-temperature environment. This allows the heating gun wire 10 to be heated at low temperatures. The gun wire 10 can be heated by heating the coolant, which will melt the ice and soften the gun wire 10, making it easier for the user to operate.

[0052] As shown in Figures 1-7, a pump body 24 is also installed on the main circuit 20. Specifically, the circulation of coolant requires a power source. By installing the pump body 24 in the main circuit 20, the pump body 24 can provide circulation power for the coolant in the main circuit 20, allowing the coolant to flow in the main circuit 20 and further flow to the heating branch circuit 40. This achieves the circulation of coolant, ensuring the heat dissipation function of the charging pile 100 and its low-temperature heating function.

[0053] Furthermore, in this embodiment, as shown in Figures 1-7, the pump body 24 is located between the outlet of the storage tank 21 and the charging line 10. In this way, the pump body 24 can pump the coolant flowing from the storage tank 21 to the charging line 10, and further, selectively return it to the storage tank 21 through the heating branch 40, thereby ensuring the circulation of the coolant and guaranteeing the normal operation of the charging pile 100.

[0054] As shown in Figures 1-7, a heating element 23 is also provided on the main circuit 20. Specifically, by providing the heating element 23 on the main circuit 20, the heating element 23 can heat the coolant. On the one hand, it can adjust the viscosity of the coolant and reduce the circulation resistance of the coolant. On the other hand, the heated coolant can enter the gun wire 10 and heat the gun wire 10, which can effectively melt the frost on the surface of the gun wire 10 and soften the gun wire 10, thus making it easier for the user to use.

[0055] Furthermore, in this embodiment, as shown in Figures 1-7, the heating element 23 is located between the outlet of the liquid storage tank 21 and the nozzle 10. Thus, when the heating element 23 needs to be activated, it can heat the coolant flowing from the liquid storage tank 21, allowing the heated coolant to subsequently enter the nozzle 10 and heat it, thereby reducing heat loss during flow, increasing the softening speed of the nozzle 10, and improving the softening effect.

[0056] As shown in Figures 1-7, the charging pile 100 may also include a cooling branch 30, which is connected in series with the main line 20. The cooling branch 30 is equipped with a radiator 31, and the heating branch 40 is connected in parallel with the cooling branch 30.

[0057] Specifically, during the charging process, current flows through the charging cable 10 and the charging gun, causing them to heat up. By setting up a cooling branch 30, the radiator 31 on the cooling branch 30 can exchange heat with the external environment. Furthermore, by connecting the charging cable 10 to the main circuit 20 and connecting the cooling branch 30 in series with the main circuit 20, the low-temperature coolant flowing from the storage tank 21 can flow to the charging cable 10. The low-temperature coolant can exchange heat with the charging cable 10 to form a high-temperature coolant, which then flows into the radiator 31. At the radiator 31, the high-temperature coolant exchanges heat with the external environment to become a low-temperature coolant, and then returns to the storage tank 21.

[0058] In this way, the coolant can circulate in the main circuit 20 and the cooling branch circuit 30, and the coolant can continuously cool the charging gun 10, avoid thermal runaway of the charging gun and the charging gun 10, and ensure the normal operation of the charging pile 100.

[0059] The fan 311 can be positioned to correspond with the radiator 31, thereby accelerating airflow, improving heat dissipation efficiency, and thus enhancing the cooling efficiency of the gun wire 10. Furthermore, the radiator 31 is equipped with a drain valve 312 to drain the coolant from it.

[0060] Furthermore, in this embodiment, because the radiator 31 is exposed to a low-temperature environment, if the coolant flows through the radiator 31, a significant amount of heat will be transferred to the environment, resulting in substantial heat loss. By connecting the heating branch 40 and the cooling branch 30 in parallel, when the charging station 100 operates in a low-temperature environment, the heating branch 40 can be connected to the main circuit 20, allowing the coolant to bypass the radiator 31 and enter the storage tank 21 through the heating branch 40, thereby reducing heat loss. It can also be understood that after softening the charging cable 10, the main circuit 20 can be connected to the cooling branch 30 to ensure the cooling effect on the charging cable 10.

[0061] As shown in Figures 1-6, a valve assembly 41 is provided on the heating branch 40 to control the parallel connection of the heating branch 40 and the cooling branch 30. Specifically, by providing the valve assembly 41 on the heating branch 40, the valve assembly 41 can switch the heating branch 40 on and off, thereby facilitating the control of the operation of the heating branch 40 and the parallel connection of the heating branch 40 and the cooling branch 30, making the charging pile 100 more intelligent and reliable. The valve assembly 41 includes, but is not limited to, a solenoid valve.

[0062] As shown in Figures 1, 2, 5 and 6, the charging pile 100 may also include a shunt branch 60, which is connected in parallel with the charging gun line 10 to divert the coolant entering the charging gun line 10.

[0063] Specifically, considering the low-temperature start-up conditions, the charging pile 100 operates in a low-temperature environment, such as an ambient temperature of -20℃ or lower. During the start-up of the main circuit 20, the high viscosity of the coolant at low temperatures increases flow resistance, and the power provided by the pump body 24 may not be able to directly drive the circulation of the coolant, causing the pump body 24 to have difficulty starting or fail to start. The cooling circuit cannot cool the gun wire 10 in time, which may cause the temperature of the gun wire 10 to be too high.

[0064] By setting up a diversion branch 60, which is connected in parallel with the gun line 10, the diversion branch 60 can be used to divert the coolant entering the gun line 10 in a low-temperature environment. This allows the coolant to bypass the gun line 10, shortens the coolant circulation path, and thus allows the coolant to circulate, making it easier for the pump body 24 to start at low temperatures.

[0065] Referring to Figures 1, 5, and 6, the first end 61 of the diversion branch 60 is connected between the reservoir 21 and the nozzle line 10, and the second end 62 of the diversion branch 60 is connected to the reservoir 21. With this configuration, when the diversion branch 60 is working, the oil in the reservoir 21 can selectively enter the diversion branch 60 through the first end 61 and then return to the reservoir 21, thus avoiding entering the nozzle line 10; or it can selectively enter the nozzle line 10 directly and then return to the reservoir 21. This allows the diversion branch 60 to be connected in parallel with the nozzle line 10, enabling the diversion branch 60 to divert coolant into the nozzle line 10, resulting in a simple and reliable circuit architecture.

[0066] It should be noted that the second end 62 of the branch line 60 can be directly connected to the liquid storage tank 21, or it can be connected to the liquid storage tank 21 through the radiator 31.

[0067] In a specific embodiment of this application, as shown in Figures 1-6, the second end 62 of the diversion branch 60 is connected to the liquid storage tank 21 through the radiator 31. That is, the second end 62 of the diversion branch 60 is first connected to the radiator 31, and the radiator 31 is connected to the liquid storage tank 21. In this way, in a low-temperature environment, the operation of the diversion branch 60 can make the power of the pump body 24 be used to drive the flow of coolant in the radiator 31.

[0068] Furthermore, in this embodiment, the coolant in the charging gun 10 has a low temperature and high flow resistance in the initial stage, and the coolant cannot flow. However, as the charging gun works, the heat of the charging gun 10 is transferred to the coolant in the gun, the viscosity of the coolant gradually decreases, and the flow resistance gradually decreases. Since the pump body 24 has been started at this time, and the coolant in the radiator 31 has been circulated, the flow resistance of the entire circuit also decreases as the coolant temperature rises. At this time, the connection between the branch circuit 60 and the main circuit 20 can be disconnected, so that the coolant can enter the charging gun 10 for circulation and cool the charging gun 10. The charging pile 100 enters the normal cooling state.

[0069] As shown in Figures 1-7, a heating element 23 and a pump body 24 are also provided on the main road 20. The heating element 23 is located between the liquid storage tank 21 and the pump body 24. Specifically, by placing the heating element 23 between the liquid storage tank 21 and the pump body 24, the coolant flowing out of the liquid storage tank 21 can be heated by the heating element 23. The heated coolant then enters the pump body 24. This avoids the coolant entering the pump body 24 having excessive viscosity, which would reduce the working efficiency of the pump body 24. This ensures the good operating condition of the pump body 24 and improves the working performance of the charging pile 100.

[0070] Referring to Figures 1-6, the first end 61 of the branch circuit 60 is connected between the pump body 24 and the nozzle line 10. Specifically, by connecting the first end 61 of the branch circuit 60 between the pump body 24 and the nozzle line 10, the coolant circulates between at least a portion of the main circuit 20 and the branch circuit 60. This portion of the main circuit 20 is equipped with a reservoir 21, a heating element 23, and a pump body 24.

[0071] In this embodiment, the pump body 24 can drive the coolant to circulate between this part of the main circuit 20 and the branch circuit 60. The path of the loop formed by this part of the main circuit 20 and the branch circuit 60 is shorter, the starting resistance of the pump body 24 is smaller, and the starting of the pump body 24 is easier. In addition, in this embodiment, the heating element 23 can be activated based on the viscosity parameters of the coolant. When the heating element 23 needs to be activated, it can heat the coolant. The heated coolant can directly enter the radiator 31 through the branch circuit 60, which can quickly raise the temperature of the coolant in the radiator 31. This not only increases the fluidity of the coolant but also melts frost on the surface of the radiator 31, thereby further assisting the low-temperature start-up of the charging pile 100 and improving the reliability of the charging pile 100.

[0072] As shown in Figures 1-7, the charging pile 100 may also include a filter element 26, which is connected between the reservoir 21 and the heating element 23. Specifically, when the coolant flows in the main line 20 and the branch line 60, it can carry away impurities in the main line 20 and the branch line 60. By connecting the filter element 26 between the reservoir 21 and the heating element 23, the coolant flowing out of the reservoir 21 will first be filtered by the filter element 26 before flowing to the heating element 23 and the pump body 24. This prevents impurities in the coolant from flowing to the heating element 23 and the pump body 24, which could cause damage to them. This ensures the normal operation of the charging pile 100 and improves its reliability.

[0073] As shown in Figures 1-6, the charging pile 100 may also include a heating element 50, and a heat exchanger 28 is also provided on the main road 20. The coolant exchanges heat with the heating element 50 through the heat exchanger 28 to cool the heating element 50.

[0074] Specifically, when the charging pile 100 charges a vehicle, in addition to the charging gun generating heat, there are also heat-generating components 50 such as components and copper busbars. By including a heat exchanger 28 in the main circuit 20, which is arranged adjacent to the heat-generating components 50, the coolant can flow to the heat exchanger 28 and exchange heat with the heat-generating components 50, thereby cooling the heat-generating components 50. This not only ensures the cooling of the charging gun but also simultaneously cools other heat-generating components 50, improving the reliability of the charging pile 100.

[0075] Furthermore, in this embodiment, the heat exchanger 28 is spaced apart on the side of the gun wire 10 away from the liquid storage tank 21. In this way, the coolant can first flow into the gun wire 10 to cool it, and then flow into the heat exchanger 28 to exchange heat with the heat-generating element 50. This optimizes the relative positions of the heat-generating element 50 and the gun wire 10, making full use of the heat difference between the coolant and the gun wire 10 and the heat-generating element 50, and achieving effective heat dissipation for the gun wire 10 and the heat-generating element 50.

[0076] As shown in Figures 1-7, there are multiple charging lines 10 connected in parallel. Specifically, multiple charging guns can be installed in the charging pile 100, with each charging gun containing one charging line 10. The multiple charging lines 10 connected in parallel can meet the charging needs of multiple users.

[0077] In some embodiments of this disclosure, as shown in Figures 1-7, the main circuit 20 may include a first main circuit 201 and a second main circuit 202, and the multiple gun wires 10 may include a first gun wire 11 and a second gun wire 12. The first main circuit 201 and the second main circuit 202 are connected in parallel. The first main circuit 201 is connected in series with the cooling branch 30, the heating branch 40 and the liquid storage tank 21, and the second main circuit 202 is connected in series with the cooling branch 30, the heating branch 40 and the liquid storage tank 21. The first gun wire 11 is located in the first main circuit 201, and the second gun wire 12 is located in the second main circuit 202.

[0078] Thus, in this embodiment, the first charging cable 11 and even the first charging gun can be heated and softened at low temperatures by connecting the first main circuit 201 in series with the heating branch 40 and the liquid storage tank 21. Similarly, the second charging cable 12 and even the second charging gun can be heated and softened at low temperatures by connecting the second main circuit 202 in series with the heating branch 40 and the liquid storage tank 21. Furthermore, in this embodiment, the first charging cable 11 and even the first charging gun can be cooled and reduced by connecting the first main circuit 201 in series with the cooling branch 30 and the liquid storage tank 21. Similarly, the second charging cable 12 and even the second charging gun can be cooled and reduced by connecting the second main circuit 202 in series with the cooling branch 30 and the liquid storage tank 21.

[0079] Correspondingly, two filter elements 26 can be configured, namely a first filter element 261 and a second filter element 262, which are respectively connected to the heating element 23. Also, since there are two gun wires 10, there are also two corresponding heating elements 50, namely a first heating element 51 and a second heating element 52. Therefore, two heat exchange elements 28 can also be configured, namely a first heat exchange element 281 and a second heat exchange element 282. The first heat exchange element 281 is suitable for cooling the first heating element 51, and the second heat exchange element 282 is suitable for cooling the first heating element 51.

[0080] As shown in Figures 1-6, a diverter 25 is also provided on the main line 20. The diverter 25 is located between the pump body 24 and the gun line 10. The first end 61 of the diverter branch 60 is connected to the diverter 25. The diverter 25 is located in the first main line 201 and the second main line 202.

[0081] Specifically, a splitter 25 can be set up, which has multiple channels and functions of switching channels and controlling channel flow.

[0082] By placing the distributor 25 in the first main circuit 201 and the second main circuit 202, connecting the inlet of the distributor 25 to the outlet of the liquid storage tank 21, and connecting the outlet of the distributor 25 to the first end 61 of the branch circuit 60, the first main circuit 201, and the second main circuit 202, the coolant flowing out of the liquid storage tank 21 can selectively enter the branch circuit 60 under the action of the distributor 25 to meet the starting requirements at low temperatures, or selectively enter the first main circuit 201 to meet the cooling requirements of the first gun line 11 at normal or high temperatures, or selectively enter the second main circuit 202 to meet the cooling requirements of the second gun line 12 at normal or high temperatures, thereby making the charging pile 100 more intelligent and controllable.

[0083] As shown in Figures 1-6, a junction box 27 is also provided on the main line 20. The junction box 27 is located in the first main line 201 and the second main line 202. The heating branch 40 is connected in series with the junction box 27, and the cooling branch 30 is connected in series with the junction box 27.

[0084] Specifically, by setting the manifold 27 in the first trunk line 201 and the second trunk line 202, the inlet of the manifold 27 is connected to the first trunk line 201 and the second trunk line 202 respectively, so that the coolant in the first trunk line 201 and the coolant in the second trunk line 202 can be combined at the manifold 27.

[0085] Furthermore, by connecting the heating branch 40 in series with the manifold 27 and the cooling branch 30 in series with the manifold 27, the manifold 27 can serve as the connection point between the main line 20 and the heating branch 40 and the cooling branch 30 respectively. In this way, the coolant of the first main line 201 and the coolant of the second main line 202 can be combined at the manifold 27 and selectively enter the cooling branch 30 or the heating branch 40. This allows the first gun line 11 and the second gun line 12 to share a radiator 31 and a reservoir 21, which simplifies the architecture of the entire circuit and reduces the number of parts.

[0086] In this embodiment, further as shown in Figures 1-6, the second end 62 of the shunt branch 60 is connected to the combiner 27. In this way, the combiner 27 can also serve as the connection point between the main circuit 20 and the shunt branch 60. The coolant in the shunt branch 60 and the coolant in the main circuit 20 can be combined at the combiner 27 and then selectively enter the cooling branch 30 or the heating branch 40. This makes the architecture of the entire circuit simpler and further improves the reliability of the charging pile 100.

[0087] As shown in Figures 1-7, two pump bodies 24 can be configured, and both pump bodies 24 can be connected to the inlet of the distributor 25. This allows for selective driving of several of the two pump bodies 24 to provide power for the coolant in several of the two gun wires 10. The two pump bodies 24 can serve as backups for each other, which not only improves the reliability of the charging pile 100 but also enhances its expandability.

[0088] Thus, the charging pile 100 has dual guns and dual pumps, and can switch to different working states according to actual operating conditions. The working states of the charging pile 100 include, but are not limited to, dual-gun rated power overcharging mode, single-gun boosted power overcharging mode, dual-gun low-power fast charging mode, and single-pump failure mode.

[0089] Dual-gun rated power overcharging mode. Specifically, when the charging gun is operating normally at its rated overcharging power (typically charging current 400A~600A), the pump body 24 operates independently, with single pump tube and single gun cooling. This is achieved by controlling the flow divider 25, allowing the first pump body 241 to provide and control the coolant flow rate of the first gun line 11, and the second pump body 242 to provide and control the coolant flow rate of the second gun line 12. The charging pile 100 operates in a dual-pump, dual-gun cooling state. This allows for independent control of the first gun line 11 and the second gun line 12, resulting in more precise and simpler flow distribution and less mutual interference caused by differences in cooling requirements between the two guns. Furthermore, this reduces the requirements for each pump body 24, allowing for smaller pump body sizes. When operating with a single gun, the pump can operate within its optimal operating range, reducing capacity redundancy of the pump body 24.

[0090] Single-gun overcharging with increased power. Specifically, when the charging gun operates at increased overcharging power (charging current 600A~1000A or above), dual pumps supply cooling for each gun. If the first charging gun is charging at increased power, its cooling demand increases significantly, and the flow provided by a single pump cannot meet this demand. In this case, by controlling the shunt 25, the first pump body 241 and the second pump body 242 simultaneously provide flow to the first gun line 11 for cooling, improving the cooling capacity of the first charging gun and thus meeting the cooling requirements of the increased power charging. Meanwhile, the second charging gun can still achieve conventional fast charging capability through power distribution. At this time, the cooling demand of the second charging gun is very small, and the flow distribution is achieved through the shunt 25 to distribute coolant to the second gun line 12.

[0091] Dual-gun low-power fast charging operation. Specifically, during dual-gun low-power fast charging, the cooling requirement is relatively small. When a single pump provides cooling for a single gun, the cooling flow rate required by pump body 24 is very small. Pump body 24 operates in a low-speed, low-efficiency, non-optimal operating range. Alternatively, if pump body 24 operates at high speed and high flow rate for cooling, the temperature of the charging cable 10 drops rapidly, and then pump body 24 stops rotating. Repeated start-stop cycles, such as the temperature of the charging cable 10 rising and pump body 24 restarting, affect the lifespan of pump body 24. If pump body 24 does not stop and maintains a certain speed, its capacity is wasted. In this case, one of the first pump body 241 and the second pump body 242 can operate to supply cooling for both guns. This satisfies the cooling requirements while allowing the operating pump body 24 to operate at its maximum efficiency within its optimal operating range. Furthermore, the other pump body 24 can remain stationary, saving energy consumption and significantly reducing the operating time of pump body 24 in the low-speed, low-efficiency operating range. This is beneficial for extending the lifespan of pump body 24 and saving energy.

[0092] Single pump failure mode. Specifically, when one pump body 24 fails, such as the second pump body 242, the first pump body 241 can provide power. The coolant flow direction can be adjusted via the distributor 25 to selectively supply coolant to the first charging gun line 11 and the second charging gun line 12. This allows the first pump body 241 to cool both charging guns, or to cool only the first charging gun line 11 or the second charging gun line 12, ensuring that both the first and second charging guns are properly cooled, thus guaranteeing the normal operation of the entire charging pile 100 and increasing its safety and reliability. It is understood that if the first pump body 241 fails, the second pump body 242 can also ensure the normal cooling of both the first and second charging guns. In other words, the two pumps can serve as backups for each other, improving the reliability and compatibility of the charging pile 100.

[0093] In some embodiments of this disclosure, as shown in Figures 1-6, the charging pile 100 may further include a first pressure sensor 29. The first pressure sensor 29 is disposed in the first main circuit 201 and located between the shunt 25 and the first charging cable 11. This allows the first pressure sensor 29 to detect and provide real-time feedback on the coolant pressure at the inlet of the first charging cable 11, protecting the pressure safety of the first main circuit 201. Additionally, the charging pile 100 may further include a second pressure sensor 210. The second pressure sensor 210 is disposed in the second main circuit 202 and located between the shunt 25 and the second charging cable 12. This allows the second pressure sensor 210 to detect and provide real-time feedback on the coolant pressure at the inlet of the second charging cable 12, protecting the pressure safety of the second main circuit 202.

[0094] In another embodiment of this disclosure, as shown in FIG7, the charging pile 100 may further include a third pressure sensor 211, which is disposed within the shunt 25. In this way, the third pressure sensor 211 can detect and provide feedback on the coolant pressure at the inlet of the first charging cable 11 or the inlet of the second charging cable 12 in real time, protecting the pressure safety of the first main circuit 201 and the second main circuit 202.

[0095] As shown in Figures 5 and 6, the charging pile 100 may also include a first temperature sensor 212. The first temperature sensor 212 is disposed in the first main circuit 201 and located between the first charging gun line 11 and the combiner 27. After the coolant flows out from the outlet of the first charging gun line 11, it will first pass through the first temperature sensor 212 and then flow to the combiner 27. In this way, the first temperature sensor 212 can detect the temperature of the coolant at the outlet of the first charging gun line 11. The temperature of the coolant at the outlet of the first charging gun line 11 can reflect the temperature of the first charging gun line 11. Therefore, it can not only adjust the operation of the pump body 24 and the fan 311 in a timely manner according to the detected temperature to meet the cooling requirements of the first charging gun, but also help to determine whether the first charging gun line 11 is blocked based on whether the detected temperature value rises abnormally.

[0096] Furthermore, the charging pile 100 may also include a second temperature sensor 213. The second temperature sensor 213 is disposed in the second main circuit 202 and located between the second charging gun line 12 and the combiner 27. After the coolant flows out from the outlet of the second charging gun line 12, it will first pass through the second temperature sensor 213 and then flow to the combiner 27. In this way, the second temperature sensor 213 can detect the temperature of the coolant at the outlet of the second charging gun line 12. The temperature of the coolant at the outlet of the second charging gun line 12 can reflect the temperature of the second charging gun line 12. Therefore, it can not only adjust the operation of the pump body 24 and the fan 311 in a timely manner according to the detected temperature to meet the cooling requirements of the second charging gun, but also help to determine whether the second charging gun line 12 is blocked according to whether the detected temperature value rises abnormally.

[0097] It should be noted that, in some other embodiments of this disclosure, as shown in Figures 1-4, a first pressure-temperature sensor 224 can be used to replace the first temperature sensor 212. This allows for the detection of both temperature and pressure, and can be used in conjunction with the first pressure sensor 29 to detect the pressure drop in the first main circuit 201 and indicate whether the first main circuit 201 is blocked. Furthermore, a second pressure-temperature sensor 225 can be used to replace the first temperature sensor 212. This allows for the detection of both temperature and pressure, and can be used in conjunction with the second pressure sensor 210 to detect the pressure drop in the second main circuit 202 and indicate whether the second main circuit 202 is blocked.

[0098] As shown in Figures 1, 4, and 6, the charging pile 100 may also include a first flow sensor 214. The first flow sensor 214 is disposed in the first main circuit 201 and located between the first charging line 11 and the combiner 27. After the coolant flows out from the outlet of the first charging line 11, it will first pass through the first flow sensor 214 and then flow to the radiator 31 through the combiner 27. In this way, the first flow sensor 214 can detect and determine whether there is coolant flowing in the first charging line 11, thereby helping to determine whether the first charging line 11 is blocked.

[0099] Additionally, the charging pile 100 may also include a second flow sensor 215. The second flow sensor 215 is disposed in the second main circuit 202 and located between the second gun line 12 and the combiner 27. After the coolant flows out from the outlet of the second gun line 12, it will first pass through the second flow sensor 215 and then flow to the radiator 31 through the combiner 27. In this way, the second flow sensor 215 can detect and determine whether there is coolant flowing in the second gun line 12, thereby assisting in determining whether the second gun line 12 is blocked.

[0100] As shown in Figures 1, 4 and 5, the charging pile 100 may also include a first one-way valve 216. The first one-way valve 216 is disposed in the first main line 201 and located between the distributor 25 and the first gun line 11, so as to allow only the coolant flowing from the distributor 25 to flow to the first gun line 11. This can limit the flow direction of the coolant between the outlet of the distributor 25 and the inlet of the first gun line 11, and prevent the coolant of the first gun line 11 from flowing back to the distributor 25.

[0101] Additionally, the charging pile 100 may also include a second one-way valve 217, which is disposed in the second trunk line 202 and located between the splitter 25 and the second gun line 12, so as to allow only the coolant flowing from the splitter 25 to flow to the second gun line 12. This can limit the flow direction of the coolant between the outlet of the splitter 25 and the inlet of the second gun line 12, and prevent the coolant of the second gun line 12 from flowing back to the splitter 25.

[0102] As shown in Figures 1, 4 and 5, the charging pile 100 may also include a third one-way valve 218. The third one-way valve 218 is disposed in the first main line 201 and located between the first charging line 11 and the junction box 27, so as to allow only the coolant flowing from the first charging line 11 to flow to the junction box 27. This can limit the flow direction of the coolant between the outlet of the first charging line 11 and the inlet of the junction box 27, and prevent the coolant from flowing back from the outlet of the first charging line 11.

[0103] Additionally, the charging pile 100 may also include a fourth one-way valve 219, which is disposed in the second trunk line 202 and located between the second gun line 12 and the manifold 27, so as to allow only the coolant flowing from the second gun line 12 to flow to the manifold 27. This can limit the flow direction of the coolant between the outlet of the second gun line 12 and the inlet of the manifold 27, and prevent the coolant from flowing back from the outlet of the second gun line 12.

[0104] Thus, by setting the first check valve 216, the second check valve 217, the third check valve 218, and the fourth check valve 219, the pressure states of the first trunk line 201 where the first gun line 11 is located and the second trunk line 202 where the second gun line 12 is located can be made to not affect each other.

[0105] Furthermore, in this embodiment, the abnormal pressure values ​​detected by the first pressure sensor 29 and the second pressure sensor 210 are sufficient to quickly locate the fault in the first gun wire 11 or the second gun wire 12. The first temperature sensor 212 and the second temperature sensor 213, or the first flow sensor 214 and the second flow sensor 215, are used to determine whether the gun wire 10 is blocked. Thus, the status of the gun wire 10 can be quickly detected and the fault location of the gun wire 10 can be quickly located.

[0106] For example, assuming that the first gun line 11 is blocked, the pressure value of the first pressure sensor 29 will suddenly increase, while the pressure value of the second pressure sensor 210 will remain basically unchanged. The abnormal pressure value of the first pressure sensor 29 can quickly locate the fault in the first gun line 11. At the same time, by using the flow value of the first flow sensor 214 or the temperature value of the first temperature sensor 212, it can be further determined that the first gun line 11 is blocked, so that the first gun line 11 can be repaired directly.

[0107] The charging pile 100 may include at least one embodiment, another embodiment, yet another embodiment, and yet another embodiment.

[0108] Referring to Figure 1, in one embodiment, a main circuit 20, a cooling branch circuit 30, a diversion branch circuit 60, and a heating branch circuit 40 are provided. Furthermore, in addition to the nozzle line 10, liquid storage tank 21, filter element 26, heating element 23, pump body 24, diverter 25, nozzle line 10, manifold 27, and radiator 31, the main circuit 20 is also equipped with a first heat exchanger 281, a second heat exchanger 282, a first pressure sensor 29, a second pressure sensor 210, a first pressure-temperature sensor 224, a second pressure-temperature sensor 225, a first flow sensor 214, a second flow sensor 215, a first check valve 216, a second check valve 217, a third check valve 218, and a fourth check valve 219.

[0109] Thus, in this embodiment, by setting up the shunt branch 60 and the heating branch 40, the heating and start-up requirements of the charging pile 100 in low-temperature environments can be met, expanding the applicable scenarios of the charging pile 100 and improving the user experience.

[0110] In addition, in this embodiment, the arrangement of the heat sink 31, the first heating element 51 and the second heating element 52 can not only ensure the cooling of the charging gun, but also take into account the simultaneous cooling of other heating elements 50, thereby improving the reliability of the charging pile 100.

[0111] Furthermore, in this embodiment, the configuration of the first one-way valve 216, the second one-way valve 217, the third one-way valve 218, and the fourth one-way valve 219 ensures that the pressure states of the circuit containing the first gun wire 11 and the circuit containing the second gun wire 12 do not affect each other. By simply detecting abnormal pressure values ​​through the first pressure sensor 29 and the second pressure sensor 210, a fault in the first gun wire 11 or the second gun wire 12 can be quickly located. Furthermore, by using the first temperature sensor 212 and the second temperature sensor 213, as well as the first flow sensor 214 and the second flow sensor 215, it can be determined whether the gun wire 10 is blocked. Thus, the status of the gun wire 10 can be quickly detected and the fault location of the gun wire 10 can be quickly located. The reliability and effectiveness of detecting gun wire 10 blockage are both high.

[0112] Referring to Figure 5, compared to one embodiment, in another embodiment, the first flow sensor 214 and the second flow sensor 215 are removed, and the first pressure and temperature sensor 224 is removed at the outlet of the first gun line 11 and a first temperature sensor 212 is installed instead, and the second pressure and temperature sensor 225 is removed at the outlet of the second gun line 12 and a second temperature sensor 213 is installed instead.

[0113] Thus, due to the configuration of the first one-way valve 216, the second one-way valve 217, the third one-way valve 218, and the fourth one-way valve 219, the pressure detected by the first pressure sensor 29 and the pressure detected by the second pressure sensor 210 do not affect each other. When both guns are working simultaneously, the pressure values ​​of the first pressure sensor 29 and the second pressure sensor 210 can be used to quickly determine whether the first gun wire 11 or the second gun wire 12 is blocked. An abnormal increase in the temperature values ​​of the first temperature sensor 212 and the second temperature sensor 213 can help determine whether the first gun wire 11 or the second gun wire 12 is blocked.

[0114] Referring to Figure 6, compared to one embodiment, in another embodiment, the first check valve 216, the second check valve 217, the third check valve 218, and the fourth check valve 219 are omitted, which can reduce flow resistance. In addition, the first pressure and temperature sensor 224 is omitted at the outlet of the first gun line 11 and a first temperature sensor 212 is installed instead, and the second pressure and temperature sensor 225 is omitted at the outlet of the second gun line 12 and a second temperature sensor 213 is installed instead.

[0115] Thus, when both guns are operating simultaneously, the pressure sensors react quickly, allowing for rapid determination of whether gun wire 10 is blocked by the pressure values ​​of the first pressure sensor 29 and the second pressure sensor 210. However, because the pressure values ​​of the first pressure sensor 29 and the second pressure sensor 210 influence each other and are essentially the same, it is impossible to quickly pinpoint whether the blockage is in the first gun wire 11 or the second gun wire 12. The flow rate changes of the first flow sensor 214 and the second flow sensor 215 are used to quickly determine whether the blockage is in the first gun wire 11 or the second gun wire 12. Abnormal increases in the temperature values ​​of the first temperature sensor 212 and the second temperature sensor 213 further assist in determining whether the blockage is in the first gun wire 11 or the second gun wire 12.

[0116] Referring to Figure 7, compared to one embodiment, in another embodiment, the first check valve 216, the second check valve 217, the third check valve 218, and the fourth check valve 219 are eliminated. This reduces flow resistance. Furthermore, the first pressure and temperature sensor 224 is eliminated at the outlet of the first gun line 11 and a first temperature sensor 212 is installed instead. The second pressure and temperature sensor 225 is eliminated at the outlet of the second gun line 12 and a second temperature sensor 213 is installed instead. The first pressure sensor 29 and the second pressure sensor 210 are also eliminated. A third pressure sensor 211 is installed in the flow divider 25. At the same time, the flow divider branch 60 and the heating branch 40 are eliminated.

[0117] Thus, in this embodiment, the cooling of the heat-generating component 50 in the charging pile 100 is not considered, resulting in a simple structure, low cost, and suitability for use in normal or high-temperature environments. Furthermore, in this embodiment, when both charging guns operate simultaneously, the pressure value of the third pressure sensor 211 can indicate whether the charging wire 10 is blocked, but it cannot quickly pinpoint whether the blockage is in the first charging wire 11 or the second charging wire 12. A secondary detection is needed to determine whether the blockage is in the first charging wire 11 or the second charging wire 12 by shutting down the pipeline containing one of them. An abnormal increase in the temperature values ​​of the first temperature sensor 212 and the second temperature sensor 213 can assist in determining whether the first charging wire 11 or the second charging wire 12 is blocked.

[0118] As shown in Figures 1-7, a third temperature sensor 220 is also installed inside the coolant storage tank 21. This third temperature sensor 220 is suitable for detecting the temperature of the coolant entering the coolant storage tank 21. Specifically, by installing the third temperature sensor 220 in the coolant storage tank 21, the third temperature sensor 220 can detect and provide feedback on the temperature of the coolant in the tank 21 in real time. Furthermore, based on the coolant temperature, the speed of the fan 311 can be adjusted in real time, thereby ensuring that the coolant temperature is always controlled within a set range. This guarantees sufficient cooling of the charging gun by the charging pile 100, making the charging pile 100 more intelligent and reliable.

[0119] As shown in Figures 1-7, a level gauge 221 is also installed inside the coolant storage tank 21. The level gauge 221 is suitable for detecting the liquid level of the coolant in the storage tank 21. Specifically, coolant is lost during flow within the charging pile 100. If the coolant flow is insufficient, the cooling performance of the charging pile 100 will be reduced. By installing the level gauge 221 inside the storage tank 21, the level gauge 221 can monitor the liquid level of the coolant in the storage tank 21 in real time. When the liquid level in the storage tank 21 is low, an alarm will be issued to remind staff to replenish the coolant in time, ensuring the normal operation of the charging pile 100. The storage tank 21 may be equipped with a replenishment port 2101, through which staff can replenish the coolant.

[0120] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0122] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A charging pile (100), characterized in that, include: Main line (20), on which a gun wire (10) and a liquid storage tank (21) are provided; and Heating branch (40) is connected in series with the main branch (20).

2. The charging pile (100) according to claim 1, characterized in that, A pump body (24) is also installed on the main road (20).

3. The charging pile (100) according to claim 2, characterized in that, The pump body (24) is located between the outlet of the liquid storage tank (21) and the gun wire (10).

4. The charging pile (100) according to any one of claims 1-3, characterized in that, A heating element (23) is also installed on the trunk road (20).

5. The charging pile (100) according to claim 4, characterized in that, The heating element (23) is located between the outlet of the liquid storage tank (21) and the gun wire (10).

6. The charging pile (100) according to any one of claims 1-5, characterized in that, It also includes a cooling branch (30), which is connected in series with the main line (20), and the cooling branch (30) is equipped with a radiator (31). The heating branch (40) is connected in parallel with the cooling branch (30).

7. The charging pile (100) according to claim 6, characterized in that, A valve assembly (41) is provided on the heating branch (40) for controlling the heating branch (40) and the cooling branch (30) to be connected in parallel.

8. The charging pile (100) according to claim 6 or 7, characterized in that, Also includes: A diversion branch (60) is connected in parallel with the gun wire (10) and is used to divert the coolant entering the gun wire (10).

9. The charging pile (100) according to claim 8, characterized in that, The first end (61) of the diversion branch (60) is connected between the liquid storage tank (21) and the gun line (10), and the second end (62) of the diversion branch (60) is connected to the liquid storage tank (21).

10. The charging pile (100) according to claim 9, characterized in that, The main road (20) is also equipped with a heating element (23) and a pump body (24), with the heating element (23) located between the liquid storage tank (21) and the pump body (24).

11. The charging pile (100) according to claim 10, characterized in that, The first end (61) of the branch line (60) is connected between the pump body (24) and the gun wire (10).

12. The charging pile (100) according to claim 10 or 11, characterized in that, There are multiple gun wires (10), and the multiple gun wires (10) are connected in parallel.

13. The charging pile (100) according to claim 12, characterized in that, The trunk line (20) includes a first trunk line (201) and a second trunk line (202), and the plurality of gun lines (10) include a first gun line (11) and a second gun line (12). The first trunk line (201) and the second trunk line (202) are connected in parallel. The first trunk line (201) is connected in series with the cooling branch (30), the heating branch (40) and the liquid storage tank (21). The second trunk line (202) is connected in series with the cooling branch (30), the heating branch (40) and the liquid storage tank (21). The first gun line (11) is located on the first main road (201), and the second gun line (12) is located on the second main road (202).

14. The charging pile (100) according to claim 13, characterized in that, A diverter (25) is also provided on the main road (20). The diverter (25) is located between the pump body (24) and the gun line (10). The first end (61) of the diverter branch (60) is connected to the diverter (25). The diverter (25) is located in the first main road (201) and the second main road (202).

15. The charging pile (100) according to claim 14, characterized in that, A junction box (27) is also provided on the trunk road (20), and the junction box (27) is provided in the first trunk road (201) and the second trunk road (202).

16. The charging pile (100) according to claim 15, characterized in that, The second end (62) of the branch branch (60) is connected to the combiner (27).

17. The charging pile (100) according to claim 15 or 16, characterized in that, Also includes: The first pressure sensor (29) is disposed in the first trunk line (201) and located between the shunt (25) and the first gun line (11); The second pressure sensor (210) is disposed in the second trunk line (202) and located between the shunt (25) and the second gun line (12).

18. The charging pile (100) according to any one of claims 15-17, characterized in that, Also includes: The third pressure sensor (211) is disposed in the shunt (25).

19. The charging pile (100) according to any one of claims 15-18, characterized in that, Also includes: The first temperature sensor (212) is disposed in the first trunk line (201) and located between the first gun line (11) and the combiner (27); The second temperature sensor (213) is disposed in the second trunk line (202) and located between the second gun line (12) and the combiner (27).

20. The charging pile (100) according to any one of claims 15-19, characterized in that, Also includes: The first flow sensor (214) is disposed on the first trunk line (201) and located between the first gun line (11) and the combiner (27); The second flow sensor (215) is disposed in the second trunk line (202) and located between the second gun line (12) and the combiner (27).

21. The charging pile (100) according to any one of claims 15-20, characterized in that, Also includes: The first check valve (216) is located in the first main line (201) and between the distributor (25) and the first gun line (11). The first check valve (216) only allows coolant to flow to the first gun line (11). The second check valve (217) is located in the second main line (202) and between the distributor (25) and the second gun line (12). The second check valve (217) only allows coolant to flow to the second gun line (12).

22. The charging pile (100) according to any one of claims 15-21, characterized in that, Also includes: The third check valve (218) is located in the first main line (201) and between the first gun line (11) and the manifold (27). The third check valve (218) only allows coolant to flow to the manifold (27). A fourth check valve (219) is provided in the second main line (202) and located between the second gun line (12) and the manifold (27). The fourth check valve (219) only allows coolant to flow to the manifold (27).

23. The charging pile (100) according to any one of claims 1-22, characterized in that, The liquid storage tank (21) is also equipped with a third temperature sensor (220), which is suitable for detecting the temperature of the coolant entering the liquid storage tank (21).

24. The charging pile (100) according to any one of claims 1-23, characterized in that, The liquid storage tank (21) is equipped with a level gauge (221), which is suitable for detecting the liquid level of the coolant in the liquid storage tank (21).

25. The charging pile (100) according to any one of claims 1-24, characterized in that, Also includes: The heating element (50) is provided with a heat exchanger (28) on the main circuit (20). The coolant exchanges heat with the heating element (50) through the heat exchanger (28) to cool the heating element (50).

26. The charging pile (100) according to claim 25, characterized in that, The heat exchanger (28) is spaced apart on the side of the gun wire (10) away from the liquid storage tank (21).

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