Charging pile and liquid cooling equipment

Abstract

The invention provides a charging pile and liquid cooling equipment. The charging pile comprises a charging connector, a liquid storage tank, a first heat exchanger, a liquid discharging channel, a liquid returning channel, a heat dissipation channel and a liquid supplementing channel. The charging connector is used for outputting electric energy to the electric vehicle. The charging pile is used for conducting the heat dissipation channel when the liquid drainage channel and the liquid return channel are communicated with the electric vehicle and a heat dissipation request message sent by the electric vehicle is received. The heat dissipation channel is used for conveying the cooling liquid flowing out of the first heat exchanger to the electric vehicle through the liquid drainage channel and conveying the cooling liquid flowing out of the electric vehicle to the first heat exchanger through the liquid return channel, and therefore heat dissipation of the charging pile on a power battery of the electric vehicle is achieved. The charging pile is further used for conducting the liquid supplementing channel when the liquid discharging channel is communicated with the electric vehicle and a liquid supplementing request message sent by the electric vehicle is received. The liquid supplementing channel is used for conveying the cooling liquid flowing out of the liquid storage tank to the electric vehicle through the liquid discharging channel, and therefore liquid supplementing of the charging pile to the liquid storage tank of the electric vehicle is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of charging, and more particularly, to a charging pile and a liquid cooling device. BACKGROUND

[0002] With the increasing popularity of electric vehicles, more and more cities have begun to build super-charging cities. This has prompted charging devices to develop into high-power super-charging devices in order to achieve a "one-second one-kilometer" fast energy supplement for electric vehicles, thereby pursuing a new charging experience of "a cup of coffee, full power departure".

[0003] However, as the charging device provides a continuously increasing charging power to the power battery of the electric vehicle, the heat generated by the power battery will also increase significantly. This results in a continuously increasing temperature of the power battery during the high-power charging of the electric vehicle, and an excessively high temperature easily causes the efficiency and safety of the power battery to decrease during charging, thereby affecting the normal operation of the high-power fast charging of the electric vehicle. SUMMARY

[0004] The present application provides a charging pile and a liquid cooling device, which not only can provide cooling liquid to the electric vehicle to achieve heat dissipation of the power battery of the electric vehicle when receiving a heat dissipation request message of the electric vehicle, but also can provide cooling liquid to the electric vehicle to achieve liquid supplement of the liquid storage tank of the electric vehicle when receiving a liquid supplement request of the electric vehicle. Furthermore, not only can the heat dissipation demand of the electric vehicle during high-power fast charging be met, the efficiency and safety of the charging pile charging the electric vehicle can be improved, but also the timeliness of the liquid storage tank of the electric vehicle supplementing liquid can be improved, and the liquid storage tank supplementing liquid at a designated place can be reduced, thereby being conducive to improving the user experience.

[0005] In a first aspect, a charging pile is provided, which includes a charging connector, a liquid storage tank, a first heat exchanger, a liquid discharge channel, a liquid return channel, a heat dissipation channel, and a liquid supplement channel. The first heat exchanger includes a cooling liquid channel. The charging connector is configured to output electric energy to an electric vehicle. The liquid discharge channel is configured to be connected to a liquid injection port of the electric vehicle. The liquid return channel is configured to be connected to a liquid outlet port of the electric vehicle. The charging pile is configured to: when the liquid discharge channel is connected to the liquid injection port of the electric vehicle, the liquid return channel is connected to the liquid outlet port of the electric vehicle, and a heat dissipation request message sent by the electric vehicle is received, the heat dissipation channel is turned on. The heat dissipation channel is configured to: send the cooling liquid in the cooling liquid channel to the electric vehicle through the liquid discharge channel, and send the cooling liquid discharged by the electric vehicle to the cooling liquid channel through the liquid return channel. The heat dissipation request message includes at least one of the following messages: a message indicating that the charging pile dissipates heat for the electric vehicle, a message indicating a required flow rate of the cooling liquid of the charging pile for the electric vehicle, and a message indicating a required temperature of the cooling liquid of the charging pile for the electric vehicle. The charging pile is further configured to: when the liquid discharge channel is connected to the liquid injection port of the electric vehicle, and a liquid supplement request message sent by the electric vehicle is received, the liquid supplement channel is turned on. The liquid supplement channel is configured to send the cooling liquid in the liquid storage tank to the electric vehicle through the liquid discharge channel. The liquid supplement request message includes at least one of the following messages: a message indicating that the charging pile supplements the liquid for the electric vehicle, and a message indicating a required capacity of the cooling liquid of the charging pile for the electric vehicle.

[0006] In the charging pile provided in the embodiments of the present application, by connecting the liquid discharge channel and the liquid return channel to the electric vehicle, and turning on the heat dissipation channel when the heat dissipation request message sent by the electric vehicle is received, the cooling liquid in the charging pile can circulate between the cooling liquid channel of the first heat exchanger and the electric vehicle, so that the heat dissipation of the power battery of the electric vehicle by the charging pile is realized. This is beneficial to meet the heat dissipation demand of the power battery during high-power fast charging, improve the efficiency and safety of charging the electric vehicle by the charging pile, and thus ensure the normal high-power fast charging of the electric vehicle by the charging pile.

[0007] In addition, by connecting the liquid discharge channel to the electric vehicle, and turning on the liquid supplement channel when the liquid supplement request message sent by the electric vehicle is received, the cooling liquid in the liquid storage tank of the charging pile can flow into the electric vehicle to supplement the liquid in the liquid storage tank of the electric vehicle. This not only improves the timeliness of supplementing the liquid in the liquid storage tank of the electric vehicle, prevents the situation of insufficient cooling liquid in the liquid storage tank of the electric vehicle, but also reduces the situation of supplementing the liquid in the liquid storage tank of the electric vehicle at a designated place, thereby simplifying the liquid supplement process of the liquid storage tank of the electric vehicle and improving user experience.

[0008] In one embodiment of this application, the outlet of the coolant channel is connected to the drain channel via a reservoir. The inlet of the reservoir is connected to the outlet of the coolant channel, and the outlet of the reservoir is connected to the drain channel to form a replenishment channel. Alternatively, the return channel is connected to the inlet of the coolant channel via a reservoir. The inlet of the reservoir is connected to the return channel, the outlet of the reservoir is connected to the inlet of the coolant channel, and the outlet of the reservoir is connected to the drain channel to form a replenishment channel.

[0009] Based on the above design, the coolant tank can be connected in series to the heat dissipation channel between the drain channel, the coolant channel of the first heat exchanger, and the return channel, so that the coolant tank serves as both the supply and return water tank for the heat dissipation channel. In this way, with the heat dissipation channel open, the coolant stored in the coolant tank can circulate between the coolant tank, the coolant channel, and the electric vehicle through the coolant tank's outlet and inlet, allowing the first heat exchanger to use the coolant provided by the coolant tank to dissipate heat from the power battery.

[0010] Furthermore, the coolant reservoir can directly output coolant to the drain channel via its designated outlet to replenish the coolant in electric vehicles. In other words, a portion of the cooling system can serve as a replenishment channel. This allows the charging station to replenish the coolant in electric vehicles without requiring a separate drain outlet and drain channel connection for the reservoir, thus reducing the complexity of the charging station's channel design.

[0011] In one embodiment of this application, the charging pile includes two two-way valves. When the outlet of the coolant channel is connected to the drain channel via a reservoir, one two-way valve is used to open the channel between the outlet of the reservoir and the drain channel, and the other two-way valve is used to open the channel between the return channel and the inlet of the coolant channel. Alternatively, when the return channel is connected to the inlet of the coolant channel via a reservoir, one two-way valve is used to open the channel between the outlet of the coolant channel and the drain channel, and the other two-way valve is used to open the channel between the return channel and the inlet of the reservoir.

[0012] Based on the above design, the heat dissipation channels between the drain channel, coolant channel, and return channel can be opened by controlling the on / off state between the two valve ports in each two-way valve, or the replenishment channel between the outlet of the reservoir and the drain channel can be opened. This, in turn, helps to meet the heat dissipation or replenishment needs of electric vehicles.

[0013] In one embodiment of this application, the charging pile further includes a compressor, an expansion valve, and a second heat exchanger. The first heat exchanger further includes a refrigerant passage. The outlet of the coolant passage is connected to a drain passage via a storage tank. The compressor, refrigerant passage, expansion valve, and second heat exchanger are connected sequentially. The refrigerant passage is used for heat exchange with the coolant passage. The charging pile is also used to control the compressor to stop operating upon receiving a refrigerant replenishment request message.

[0014] Based on the above design, the refrigerant circuit formed by the compressor, the refrigerant passage of the first heat exchanger, the expansion valve, and the second heat exchanger can be used to cool the coolant in the coolant passage of the first heat exchanger. The cooled coolant can then flow into the reservoir for storage. That is, the reservoir can function as a cold water tank for heat dissipation. When the electric vehicle's battery needs cooling, the coolant stored in the reservoir at a lower temperature can quickly flow into the electric vehicle through the drain passage, thereby improving the charging station's heat dissipation efficiency for the battery. Furthermore, when the charging station receives a coolant replenishment request from the electric vehicle, since the coolant in the reservoir can flow directly into the electric vehicle without passing through the coolant passage, the compressor can be shut off to reduce the charging station's energy consumption.

[0015] In one embodiment of this application, the charging pile further includes a three-way valve, and the drain port of the liquid storage tank is connected to the drain channel through the three-way valve to form a liquid replenishment channel. The three-way valve is used to open the channel between the outlet of the coolant channel and the drain channel, or the three-way valve is used to open the channel between the drain port of the liquid storage tank and the drain channel.

[0016] Based on the above design, the coolant reservoir and the first heat exchanger are each connected to the drain channel via a three-way valve. This ensures that the coolant reservoir replenishes the electric vehicle's fluid and the first heat exchanger cools the electric vehicle independently, thereby improving the reliability of the charging station's cooling and coolant replenishment for the electric vehicle. Furthermore, because the coolant reservoir and the first heat exchanger are independently configured, when the coolant reservoir is replenishing the electric vehicle's fluid, the compressor used to cool the coolant flowing in the first heat exchanger, and the water pump used to drive the coolant flow in the first heat exchanger, can both be shut down, thus reducing the charging station's energy consumption.

[0017] In one embodiment of this application, the charging pile further includes a compressor, an expansion valve, and a second heat exchanger, the first heat exchanger further including a refrigerant passage. The compressor, refrigerant passage, expansion valve, and second heat exchanger are connected sequentially, and the refrigerant passage is used for heat exchange with the coolant passage. The charging pile is also used to: control the compressor to stop operating upon receiving a refrigerant replenishment request message.

[0018] Based on the above design, the refrigerant circuit formed by the compressor, the refrigerant passage of the first heat exchanger, the expansion valve, and the second heat exchanger can be used to cool the coolant in the coolant passage of the first heat exchanger. The cooled coolant can then flow into the electric vehicle through the drain passage, thereby achieving heat dissipation from the electric vehicle's battery by the first heat exchanger. Furthermore, when the charging station receives a coolant replenishment request from the electric vehicle, since the coolant tank can replenish the electric vehicle independently, the compressor can be shut down to reduce the charging station's energy consumption.

[0019] In one embodiment of this application, the charging pile is further used to: output electrical energy to an electric vehicle through a charging connector when the heat dissipation channel is open, and disconnect the heat dissipation channel after the charging connector has finished outputting electrical energy to the electric vehicle.

[0020] In the above technical solution, by charging the electric vehicle's power battery through the heat dissipation channel while the charging connector is connected, the reliability of the charging pile's heat dissipation of the power battery during charging can be improved, thus helping to meet the heat dissipation requirements of the power battery during high-power fast charging. When the charging pile finishes charging the electric vehicle, disconnecting the heat dissipation channel prevents coolant leakage from the drain or return channels when the connection between the drain and return channels and the electric vehicle is broken.

[0021] Secondly, a liquid cooling device is provided, comprising a reservoir, a first heat exchanger, a drain channel, a return channel, a heat dissipation channel, and a replenishment channel. The first heat exchanger includes a coolant channel. The drain channel is connected to the filler port of an electric vehicle, and the return channel is connected to the outlet port of the electric vehicle. The liquid cooling device is configured to activate the heat dissipation channel when the drain channel is connected to the filler port of the electric vehicle, the return channel is connected to the outlet port of the electric vehicle, and a heat dissipation request message is received from the electric vehicle. The heat dissipation channel is used to transport coolant flowing out of the coolant channel to the electric vehicle via the drain channel and to transport coolant flowing out of the electric vehicle back to the coolant channel via the return channel. The heat dissipation request message includes at least one of the following: a message instructing the liquid cooling device to dissipate heat from the electric vehicle; a message instructing the electric vehicle to request a specific flow rate of coolant from the liquid cooling device; and a message instructing the electric vehicle to request a specific temperature of coolant from the liquid cooling device. The liquid cooling system is also used to: connect the drain channel to the electric vehicle's coolant inlet, and activate the replenishment channel upon receiving a replenishment request message from the electric vehicle. The replenishment channel is used to transport coolant flowing from the reservoir to the electric vehicle through the drain channel. The replenishment request message includes at least one of the following: a message instructing the liquid cooling system to replenish coolant in the electric vehicle, and a message indicating the electric vehicle's required coolant capacity from the liquid cooling system.

[0022] In one embodiment of this application, the outlet of the coolant channel is connected to the drain channel via a reservoir. The inlet of the reservoir is connected to the outlet of the coolant channel, and the outlet of the reservoir is connected to the drain channel to form a replenishment channel. Alternatively, the return channel is connected to the inlet of the coolant channel via a reservoir. The inlet of the reservoir is connected to the return channel, the outlet of the reservoir is connected to the inlet of the coolant channel, and the outlet of the reservoir is connected to the drain channel to form a replenishment channel.

[0023] In one embodiment of this application, the liquid cooling device includes two two-way valves. When the outlet of the coolant channel is connected to the drain channel via a storage tank, one two-way valve is used to open the channel between the outlet of the storage tank and the drain channel, and the other two-way valve is used to open the channel between the return channel and the inlet of the coolant channel. Alternatively, when the return channel is connected to the inlet of the coolant channel via a storage tank, one two-way valve is used to open the channel between the outlet of the coolant channel and the drain channel, and the other two-way valve is used to open the channel between the return channel and the inlet of the storage tank.

[0024] In one embodiment of this application, the liquid cooling device further includes a compressor, an expansion valve, and a second heat exchanger. The first heat exchanger also includes a refrigerant passage. The outlet of the coolant passage is connected to a drain passage via a storage tank. The compressor, refrigerant passage, expansion valve, and second heat exchanger are connected sequentially. The refrigerant passage is used for heat exchange with the coolant passage. The liquid cooling device is also used to: control the compressor to stop operating upon receiving a replenishment request message.

[0025] In one embodiment of this application, the liquid cooling device further includes a three-way valve, through which the drain port of the liquid storage tank is connected to the drain channel to form a replenishment channel. The three-way valve is used to open the channel between the outlet of the coolant channel and the drain channel, or the three-way valve is used to open the channel between the drain port of the liquid storage tank and the drain channel.

[0026] In one embodiment of this application, the liquid cooling device further includes a compressor, an expansion valve, and a second heat exchanger, the first heat exchanger further including a refrigerant passage. The compressor, refrigerant passage, expansion valve, and second heat exchanger are connected sequentially, and the refrigerant passage is used for heat exchange with the coolant passage. The liquid cooling device is also used to: control the compressor to stop operating upon receiving a liquid replenishment request message. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a charging system provided in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of a charging system provided in an embodiment of this application.

[0029] Figure 3 This is an example provided in the embodiments of this application. Figure 2 The diagram shows the specific structure of the charging system.

[0030] Figure 4 This is a schematic diagram of another charging system provided in an embodiment of this application.

[0031] Figure 5 This is an example provided in the embodiments of this application. Figure 4 The diagram shows the specific structure of the charging system.

[0032] Figure 6 This is an example provided in the embodiments of this application. Figure 5 The diagram shows the heat dissipation principle of the power battery in an electric vehicle.

[0033] Figure 7 This is another example provided in the embodiments of this application. Figure 5 The diagram shows the heat dissipation principle of the power battery in an electric vehicle.

[0034] Figure 8 This is an example provided in the embodiments of this application. Figure 5 The diagram shows the principle of fluid replenishment in the reservoir of an electric vehicle.

[0035] Figure 9 This is a schematic diagram of another charging system provided in the embodiments of this application. Detailed Implementation

[0036] To facilitate understanding of the embodiments of this application, the following points will be explained before introducing the embodiments of this application.

[0037] In the description of the embodiments of this application, "connection" can refer to either an electrical connection or a pipeline connection used for the flow of coolant, refrigerant, etc. An electrical connection can be understood as the transmission of signals between two electrical components through direct or indirect electrical connections. For example, an electrical connection between A and B can be understood as a direct electrical connection between A and B, or as an indirect electrical connection between A and B through one or more other electrical components.

[0038] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more, and "at least one" and "one or more" refer to one, two, or more than two.

[0039] In the description of the embodiments of this application, unless otherwise stated, "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0040] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0041] First, to facilitate understanding of the technical solutions provided in the embodiments of this application, we will introduce the application scenarios applicable to the embodiments of this application.

[0042] Figure 1 This is a schematic diagram of the structure of a charging system 10 provided in an embodiment of this application.

[0043] Combination Figure 1 In (a) and (b) of the embodiments, the charging system 10 includes a charging device 11 and an electric vehicle 12. The charging device 11 receives alternating current (AC) output from the power grid 20 and converts it into stable direct current (DC) before supplying it to the electric vehicle 12 to charge it. Alternatively, in some other embodiments, the electric vehicle 12 can also output electrical energy back to the power grid 20 via the charging device 11.

[0044] In some embodiments, such as Figure 1 As shown in (a), the charging device 11 is a split-type charging device. Specifically, the charging device 11 includes a charging host 111, one or more charging terminals 112, and one or more charging guns 113. The charging host 111 includes multiple charging modules (not shown in the figure), and the output terminals of the multiple charging modules are connected to the one or more charging terminals 112. Each charging terminal 112 is connected to at least one of the one or more charging guns 113, and each charging gun 113 is used to connect to an electric vehicle 12. Exemplarily, the same electric vehicle 12 can be connected to one charging gun 113, or the same electric vehicle 12 can be connected to multiple charging guns 113.

[0045] In practice, multiple charging modules are used to convert the AC power output from the grid 20 into stable DC power and then deliver it to the charging terminal 112. The charging terminal 112 delivers the received DC power to the electric vehicle 12 through the connected charging gun 113.

[0046] It should be understood that, in the embodiments of this application, the multiple charging modules include, for example, an alternating current-to-direct current (AC-DC) converter and a direct current-to-direct current (DC-DC) converter. The AC-DC converter converts the AC power from the power grid 20 into DC power and outputs it to the DC-DC converter. The DC-DC converter further converts the received DC power into a stable DC power that meets the charging requirements of the electric vehicle 12.

[0047] It should also be understood that, in the embodiments of this application, the charging terminal 112 includes a housing, a human-machine interface, a charging control unit, and a metering and billing unit, etc., for information interaction, energy transmission, and metering and billing with the electric vehicle 12.

[0048] For example, the charging gun 113 includes a charging cable and a charging head. One end of the charging cable is connected to the output terminals of multiple charging modules, and the other end of the charging cable is connected to the charging head, which is used to connect to the charging interface of the electric vehicle 12. Thus, the DC power output from the multiple charging modules is delivered to the electric vehicle 12 through the charging gun 113.

[0049] In this embodiment of the application, the electric vehicle 12 is a means of transportation driven by electric power. The electric vehicle 12 can be a pure electric vehicle (battery electric vehicle, pure EV / batteryEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), or a plug-in hybrid electric vehicle (PHEV), etc.

[0050] In other embodiments, as shown in Figure (1)(b), the charging device 11 is an integrated charging device. Specifically, the human-machine interface, charging control unit, and metering and billing unit in the charging terminal 112 can be disposed together with multiple charging modules in the charging host 111, for example, disposed together in the casing of the charging host 111. Furthermore, the charging gun 113 is also directly connected to the charging host 111. In this way, the charging device 11 may only include the charging host 111 and one or more charging guns 113 connected to the charging host 111, without including the charging terminal 112.

[0051] As described in the background section above, as the charging equipment 11 continues to evolve into a supercharging charging equipment, the charging power output from multiple charging modules to the electric vehicle 12 via the charging gun 113 is continuously increasing, in order to achieve high-power fast charging of the electric vehicle 12's power battery, such as supercharging. However, with the continuous increase in charging power, the heat generated by the electric vehicle 12's power battery will increase significantly.

[0052] Although electric vehicles 12 generally come equipped with onboard thermal management systems to dissipate heat from the power battery, these systems not only need to provide cooling for the power battery but also for other components within the electric vehicle 12, such as the motor, passenger compartment, and air conditioning. Therefore, the cooling capacity provided by the onboard thermal management system for the power battery is quite limited. Relying solely on the onboard thermal management system for battery cooling is insufficient to meet the ever-increasing heat dissipation demands during high-power fast charging. This causes the power battery temperature to rise continuously during high-power fast charging, leading to a decrease in the efficiency and safety of the charging equipment 11 in charging the power battery, and affecting the normal fast charging operation of the electric vehicle 12.

[0053] Therefore, the heat dissipation of the power battery has become a key issue in achieving high-power fast charging for electric vehicles.

[0054] Based on the above, this application provides a charging pile, which includes a charging connector, a coolant tank, a first heat exchanger, a drain channel, a return channel, a heat dissipation channel, and a replenishment channel. The first heat exchanger includes a coolant channel. The charging connector is used to output electrical energy to an electric vehicle. The drain channel is used to connect to the coolant inlet of the electric vehicle, and the return channel is used to connect to the coolant outlet of the electric vehicle. The charging pile is configured to activate the heat dissipation channel when the drain channel is connected to the coolant inlet of the electric vehicle, the return channel is connected to the coolant outlet of the electric vehicle, and a heat dissipation request message is received from the electric vehicle. The heat dissipation channel is used to transport coolant flowing out of the coolant channel to the electric vehicle through the drain channel and to transport coolant flowing out of the electric vehicle back to the coolant channel through the return channel. The heat dissipation request message includes at least one of the following messages: a message instructing the charging pile to dissipate heat from the electric vehicle, a message instructing the electric vehicle to request a certain flow rate of coolant from the charging pile, and a message instructing the electric vehicle to request a certain temperature of coolant from the charging pile. The charging station is also used to: connect the drain channel to the electric vehicle's coolant inlet, and activate the coolant replenishment channel upon receiving a coolant replenishment request message from the electric vehicle. The coolant replenishment channel is used to deliver coolant flowing from the reservoir to the electric vehicle through the drain channel. The coolant replenishment request message includes at least one of the following: a message instructing the charging station to replenish coolant for the electric vehicle, and a message indicating the electric vehicle's required coolant capacity from the charging station.

[0055] In the charging pile provided in this application embodiment, by connecting the drain channel and the return channel to the electric vehicle, and by opening the heat dissipation channel upon receiving a heat dissipation request message from the electric vehicle, the coolant in the charging pile can circulate between the coolant channel of the first heat exchanger and the electric vehicle, thereby achieving heat dissipation of the electric vehicle's power battery by the charging pile. This is beneficial for meeting the heat dissipation requirements of the power battery during high-power fast charging, improving the efficiency and safety of the charging pile for charging electric vehicles, and thus ensuring the normal operation of the charging pile for high-power fast charging of electric vehicles.

[0056] Furthermore, by connecting the drain channel to the electric vehicle and activating it upon receiving a coolant replenishment request from the electric vehicle, coolant from the charging station's reservoir can flow into the electric vehicle to replenish its coolant level. This allows the charging station to simultaneously cool the electric vehicle's battery and replenish its coolant reservoir, improving the timeliness of coolant replenishment, preventing insufficient coolant levels, and reducing the need for designated locations for replenishment. This simplifies the replenishment process and enhances the user experience.

[0057] The charging system used in the charging piles provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0058] Figure 2 This is a schematic diagram of the structure of a charging system 30 provided in an embodiment of this application. It should be noted that, for ease of understanding, Figure 2 In the diagram, dashed lines represent power transmission lines, while solid lines represent pipeline connections used for the flow of coolant, refrigerant, etc.

[0059] See Figure 2 The charging system 30 includes a charging pile 500 and an electric vehicle 400. The charging pile 500 includes a charging connector 511, and the electric vehicle 400 includes a power battery 410, which includes a battery pack 411. The charging connector 511 is used to output electrical energy to the electric vehicle 400, thereby charging the battery pack 411 in the power battery 410.

[0060] Specifically, such as Figure 2As shown, the charging pile 500 includes a charging device 510, which includes multiple charging modules 512 and a charging gun (not shown in the figure). A charging connector 511 is disposed on the charging gun. The positive DC plug DC+ and negative DC plug DC- in the charging connector 511 are connected to the positive and negative output terminals of the multiple charging modules, respectively. Correspondingly, the electric vehicle 400 also includes a charging interface 450. The positive DC socket DC+ and negative DC socket DC- in the charging interface 450 are used to connect to the positive DC plug DC+ and negative DC plug DC- in the charging connector 511, and the positive DC socket DC+ and negative DC socket DC- in the charging interface 450 are also connected to the positive and negative input terminals of the power battery 410, respectively. When the charging connector 511 is connected to the charging interface 450, the DC power output by the multiple charging modules 512 can be transmitted to the battery pack 411 in the power battery 410 through the connected charging connector 511 and charging interface 450.

[0061] It should be understood that, in the embodiments of this application, the charging device 510 can be Figure 1 The separate charging device shown in (a) can also be the integrated charging device shown in (1). For a detailed description of the charging device 510, please refer to [link to documentation]. Figure 1 The embodiments shown are not described in detail here.

[0062] It should also be understood that, in the embodiments of this application, the number of battery packs 411 in the power battery 410 can be one or more, and multiple battery packs 411 can be connected in series and / or in parallel.

[0063] Continue reading Figure 2 The charging pile 500 also includes a first coolant tank 521, a first heat exchanger 522, a drain channel 5231, a return channel 5232, a heat dissipation channel M1, and a replenishment channel M2. The first heat exchanger 522 includes a coolant channel 5221. The drain channel 5231 connects to the electric vehicle's filler port 441, and the return channel 5232 connects to the electric vehicle's outlet port 442. The heat dissipation channel M1 transports the coolant flowing from the coolant channel 5221 to the electric vehicle 400 via the drain channel 5231, and transports the coolant flowing from the electric vehicle 400 back to the coolant channel 5221 via the return channel 5232. The replenishment channel M2 transports the coolant flowing from the first coolant tank 521 to the electric vehicle 400 via the drain channel 5231.

[0064] Specifically, the heat dissipation channel M1 may include a channel connecting the drain channel 5231 and the inlet 52212 of the coolant channel, and a channel connecting the outlet 52211 of the coolant channel and the return channel 5232. Thus, when the drain channel 5231 is connected to the electric vehicle's inlet 441, the return channel 5232 is connected to the electric vehicle's outlet 442, and the heat dissipation channel M1 is open, the coolant output from the outlet 52211 of the coolant channel can flow into the electric vehicle 400 through the drain channel 5231 to absorb the heat generated by the power battery 410. The coolant in the electric vehicle 400, after absorbing heat, can flow back to the coolant channel 5221 through the return channel 5232 for cooling. Furthermore, through the circulation of coolant between the coolant channel 5221 and the electric vehicle 400, the first heat exchanger 522 can dissipate heat from the power battery 410.

[0065] In one example, the first heat exchanger 522 may also include a refrigerant passage 5222 for exchanging heat with the coolant passage 5221 to cool the coolant flowing in the coolant passage 5221.

[0066] The specific process of cooling the coolant channel 5221 via the refrigerant channel 5222 will be described below and will not be repeated here.

[0067] For example, the coolant in the coolant passage 5221 is the same type as the coolant in the electric vehicle 400, such as -35°C antifreeze. This helps reduce the risk of coolant deterioration and coolant line blockage caused by the different types of coolant in the coolant passage 5221 and the electric vehicle 400.

[0068] For the replenishment channel M2, the replenishment channel M2 may include a channel for supplying coolant from the first reservoir 521 to the drain channel 5231.

[0069] For example, in some embodiments, such as Figure 2 As shown, the return channel 5232 is connected to the inlet 52212 of the coolant channel via the first reservoir 521. The inlet 5212 of the first reservoir is connected to the return channel 5232, the outlet 5211 of the first reservoir is connected to the inlet 52212 of the coolant channel, and the first outlet 5211 of the first reservoir is connected to the drain channel 5231 via the coolant channel 5221 to form the replenishment channel M2.

[0070] Therefore, the first liquid storage tank 521 can be connected in series to the heat dissipation channel M1 between the drain channel 5231 and the return channel 5232, so that the liquid storage tank 521 serves as both the supply and return water tank for the heat dissipation channel M1. In this way, when the heat dissipation channel M1 is open, the coolant stored in the first liquid storage tank 521 can circulate between the first liquid storage tank, the coolant channel 5221, and the electric vehicle 400 through the first liquid outlet 5211 and the first liquid inlet 5212 of the first liquid storage tank, allowing the first heat exchanger 522 to use the coolant provided by the first liquid storage tank 521 to dissipate heat from the power battery 410.

[0071] Furthermore, the replenishment channel M2 may include a channel connecting the first outlet 5211 of the first reservoir and the inlet 52212 of the coolant channel, and a channel connecting the outlet 52211 of the coolant channel and the drain channel 5231. That is, a portion of the cooling channel M1 serves as the replenishment channel M2. Thus, when the drain channel 5231 is connected to the electric vehicle's filler port 441 and the replenishment channel M2 is open, the coolant flowing from the first reservoir 521 can flow into the electric vehicle 400 through the coolant channel 5221 and the drain channel 5231 to replenish the reservoir in the electric vehicle 400. This allows the charging pile 500 to replenish the reservoir of the electric vehicle 400 without requiring a separate drain outlet and drain channel 5231 connection for the first reservoir 521, thereby reducing the complexity of the channel design in the charging pile 500.

[0072] For example, the coolant in the first reservoir 521 is the same type as the coolant in the electric vehicle 400, such as -35°C antifreeze. This helps reduce the risk of coolant deterioration and coolant line blockage caused by the different types of coolant in the first reservoir 521 and the electric vehicle 400.

[0073] It should be understood that, in specific implementations, the first liquid storage tank 521 and the first heat exchanger 522 can be installed together in the charging device 510, for example, together in the charging terminal housing of the charging device 510. Or, as... Figure 2 As shown, the charging pile 500 may further include a liquid cooling device 520 located outside the charging equipment 510, with the first liquid storage tank 521 and the first heat exchanger 522 disposed together in the liquid cooling device 520. Furthermore, the drain channel 5231 and the return channel 5232 may be located in the charging gun along with the charging connector 511. Alternatively, the liquid cooling device 520 may also include a liquid cooling gun, with both the drain channel 5231 and the return channel 5232 located within the liquid cooling gun.

[0074] For ease of description and understanding, this embodiment is described with the first liquid storage tank 521 and the first heat exchanger 522 installed in the liquid cooling device 520, and the drain channel 5231 and the return channel 5232 both located in the liquid cooling gun. That is, this embodiment is described with the heat dissipation channel M1 and the replenishment channel M2 both located in the liquid cooling device 520.

[0075] For example, the drain channel 5231 and the return channel 5232 can be channels in a plug with a bidirectional shut-off function.

[0076] Based on the above analysis, in specific implementation, the charging pile 500 can meet the heat dissipation requirements of the power battery 410 in the electric vehicle 400 or the liquid replenishment requirements of the liquid storage tank in the electric vehicle 400 by connecting one of the heat dissipation channel M1 and the liquid replenishment channel M2.

[0077] For example, in some embodiments, the charging pile 500 is used to: activate the cooling channel M1 when the drain channel 5231 is connected to the electric vehicle's inlet 441, the return channel 5232 is connected to the electric vehicle's outlet 442, and a cooling request message is received from the electric vehicle 400. The cooling request message includes at least one of the following messages: a message instructing the charging pile 500 to cool the electric vehicle 400, a message instructing the electric vehicle 400 to provide the required flow rate of coolant to the charging pile 500, and a message instructing the electric vehicle 400 to provide the required temperature of coolant to the charging pile 500.

[0078] It should be understood that, in the embodiments of this application, the required flow rate of coolant refers to the volume of coolant provided by the charging pile 500 to the electric vehicle 400 per unit time.

[0079] Specifically, when the electric vehicle 400 needs to be fast-charged at high power via the charging pile 500, the charging interface 450, the fluid inlet 441, and the fluid return outlet 442 of the electric vehicle 400 are connected to the charging connector 511, the drain channel 5231, and the fluid return channel 5232 of the charging pile 500. Then, the electric vehicle 400 sends a heat dissipation request message to the charging pile 500. In response to receiving this heat dissipation request message, the charging pile 500 activates the heat dissipation channel M1. In this way, the coolant output from the coolant channel 5221 of the first heat exchanger 522 can circulate between the coolant channel 5221 and the electric vehicle 400 through the drain channel 5231 and the fluid return channel 5232, thereby achieving heat dissipation for the power battery 410 by the first heat exchanger 522.

[0080] For example, the electric vehicle 400 can directly send a heat dissipation request message to the charging device 510, which then controls the heat dissipation channel M1 in the liquid cooling device 520 to be activated. Alternatively, the electric vehicle 400 can directly send the heat dissipation request message to the controller in the liquid cooling device 520, which then controls the heat dissipation channel M1 to be activated. Or, the electric vehicle 400 can first send the heat dissipation request message to the charging device 510, which then forwards it to the liquid cooling device 520.

[0081] In the above technical solution, the charging pile 500 can activate the heat dissipation channel M1 upon receiving a heat dissipation request message from the electric vehicle 400. This allows the coolant in the charging pile 500 to circulate between the coolant channel 5221 of the first heat exchanger 522 and the electric vehicle 400 through the heat dissipation channel M1, thereby achieving heat dissipation of the power battery 410 by the first heat exchanger 522. This helps meet the heat dissipation requirements of the power battery 410 during high-power fast charging, improving the efficiency and safety of the charging pile 500 in charging the electric vehicle 400, thus ensuring the normal operation of the charging pile 500 in high-power fast charging of the electric vehicle 400. Furthermore, the charging pile 500 can control the temperature and / or flow rate of the coolant delivered to the electric vehicle 400 through the drain channel 5231 according to the required temperature and / or flow rate of the coolant indicated by the heat dissipation request message, thereby better meeting the heat dissipation requirements of the power battery 410 during high-power fast charging.

[0082] It should be understood that while some solutions address the cooling requirements of the power battery 410 during high-power fast charging by enhancing the cooling capacity of the electric vehicle 400's built-in thermal management system, this necessitates modifications to the entire vehicle's cooling system, leading to increased vehicle weight and size, and higher energy consumption. Furthermore, when the electric vehicle 400 is fast-charging at lower power, the modified portion of the cooling system remains idle, resulting in low system utilization.

[0083] Therefore, in this embodiment of the application, the first heat exchanger 522 in the charging pile 500 is used to dissipate heat from the power battery 410 which is undergoing high-power fast charging. This not only meets the heat dissipation requirements of the power battery 410 during high-power fast charging, but also reduces the extent of modifications to the vehicle cooling system, thereby avoiding excessive increases in the weight and volume of the vehicle and facilitating cost optimization of the electric vehicle 400.

[0084] In other embodiments, the charging pile 500 is further configured to: connect the drain channel 5231 to the fluid inlet 441 of the electric vehicle and, upon receiving a fluid replenishment request message from the electric vehicle 400, activate the fluid replenishment channel M2. The fluid replenishment request message includes at least one of the following: a message instructing the charging pile 500 to replenish the coolant in the electric vehicle 400, and a message instructing the electric vehicle 400 to provide the required coolant capacity to the charging pile 500.

[0085] It should be understood that, in the embodiments of this application, the required capacity of coolant refers to the total volume of coolant supplied by the first reservoir 521 to the electric vehicle 400.

[0086] Specifically, when the coolant tank in the electric vehicle 400 needs to be replenished, the electric vehicle 400 can send a coolant replenishment request message to the charging pile 500, with the inlet 441 and outlet 5231 connected. In response to receiving the coolant replenishment request message, the charging pile 500 controls the coolant replenishment channel M2 to open. Thus, the coolant stored in the first coolant tank 521 can flow out from the first outlet 5211 of the first coolant tank and flow into the electric vehicle 400 through the coolant channel 5221 and outlet 5231, thereby replenishing the coolant tank of the electric vehicle 400.

[0087] It should be understood that the relevant description of the electric vehicle 400 sending a liquid replenishment request message to the charging pile 500 can be found in the relevant description of the heat dissipation request message mentioned above, and will not be repeated here.

[0088] In the above technical solution, the charging pile 500 can activate the coolant replenishment channel M2 upon receiving a coolant replenishment request message from the electric vehicle 400. This allows coolant in the first coolant reservoir 521 to flow into the electric vehicle 400 through the replenishment channel M2, replenishing the coolant in the electric vehicle 400's reservoir and preventing insufficient coolant in the electric vehicle 400's reservoir. Furthermore, the first coolant reservoir 521 can provide the electric vehicle 400 with a corresponding capacity of coolant based on the coolant demand indicated in the replenishment request message, thereby better meeting the coolant replenishment needs of the electric vehicle 400.

[0089] It should be understood that replenishing the fluid reservoir in electric vehicles (400) typically requires visits to designated locations, such as car dealerships or service centers. This necessitates that users periodically check the fluid level in their electric vehicles and, if necessary, visit these locations for replenishment. This fluid replenishment process is rather cumbersome and negatively impacts the user experience.

[0090] Therefore, in this embodiment of the application, the electric vehicle 400 can simultaneously meet the heat dissipation and charging needs of the power battery 410 and the replenishment needs of the liquid tank in the electric vehicle 400 through the charging pile 500. This can not only improve the timeliness of replenishing the liquid tank of the electric vehicle 400, but also reduce the need for replenishing the liquid tank of the electric vehicle 400 at a designated location, thereby simplifying the replenishment process of the liquid tank of the electric vehicle 400 and improving the user experience.

[0091] The charging system 30 provided in the embodiments of this application has been described above. The structure of the charging pile 500 and the electric vehicle 400 in the charging system 30 will be further described in detail below with reference to the accompanying drawings.

[0092] Figure 3 This is an example provided in the embodiments of this application. Figure 2 The diagram shows the specific structure of the charging system 30.

[0093] See Figure 3 In some embodiments, the liquid cooling device 520 in the charging pile 500 further includes a compressor 5241, a second heat exchanger 5242, and an expansion valve 524. The refrigerant passages 5222 of the compressor 5241, the second heat exchanger 5242, the expansion valve 5243, and the first heat exchanger 522 are connected in sequence.

[0094] It should be understood that, in practice, the compressor 5241, the second heat exchanger 5242, the expansion valve 5243, and the refrigerant passage 5222 can be connected via refrigerant piping. Here, refrigerant piping refers to the piping used to circulate refrigerant, which can be, for example, Freon or a liquid cooling compound.

[0095] Based on the above design, the refrigerant can circulate along the compressor 5241, the second heat exchanger 5242, the expansion valve 5243, and the refrigerant passage 5222 to cool the coolant flowing in the coolant passage 5221. Thus, when the heat dissipation passage M1 is open, the coolant output from the first reservoir 521 can be cooled and flow into the electric vehicle 400 after flowing through the coolant passage 5221 to absorb the heat generated by the power battery 410. Afterwards, the coolant carrying heat in the electric vehicle 400 can flow back into the coolant passage 5221 through the return passage 5232 and the first reservoir 521 for further cooling. This allows the first heat exchanger 522 to dissipate heat from the power battery 410. Furthermore, when the replenishment passage M2 is open, the coolant output from the first reservoir 521 can be cooled and flow into the electric vehicle 400 after flowing through the coolant passage 5221 to replenish the coolant in the electric vehicle 400's reservoir. This helps prevent the temperature inside the electric vehicle 400 from rising due to the high temperature of the coolant output from the first reservoir 521 flowing directly into the electric vehicle 400.

[0096] For example, the first heat exchanger 522 is an evaporator and the second heat exchanger 5242 is a condenser.

[0097] Continue reading Figure 3 In some embodiments, the liquid cooling device 520 further includes a water pump 525. The water pump 525 is connected between the first outlet 5211 of the first liquid storage tank and the inlet 52212 of the coolant channel, or the water pump 525 is connected between the outlet 52211 of the coolant channel and the drain channel 5231.

[0098] Based on the above design, the coolant output from the first liquid storage tank 521 can be driven by the water pump 525 to flow into the electric vehicle 400 to cool the power battery 410 of the electric vehicle 400 or to replenish the liquid storage tank of the electric vehicle 400.

[0099] Continue reading Figure 3 In some embodiments, the liquid cooling device 520 further includes two two-way valves, namely two-way valve 526 and two-way valve 527. Specifically, when the return channel 5232 is connected to the inlet 52212 of the coolant channel via the first storage tank 521, the two-way valve 526 is used to open the channel between the outlet 52211 of the coolant channel and the drain channel 5231, and the two-way valve 527 is used to open the channel between the return channel 5232 and the first inlet 5212 of the first storage tank.

[0100] Specifically, in two-way valve 526, the first valve port 5261 is connected to the coolant outlet 52211 of the coolant passage, and the second valve port 5262 is connected to the drain passage 5231. In two-way valve 527, the first valve port 5271 is connected to the first inlet 5212 of the first liquid storage tank, and the second valve port 5272 is connected to the return passage 5232.

[0101] Based on the above design, the charging pile 500 can adjust the on / off state between the two ports of the two-way valves 526 and 527 to open the heat dissipation channel M1 between the drain channel 5231, the coolant channel 5221, and the return channel 5232, or to open the replenishment channel M2 between the first outlet 5211 of the first reservoir and the drain channel 5231. For example, when receiving a heat dissipation request message, the charging pile 500 can open the heat dissipation channel M1 by opening the channels between the two ports of the two-way valve 526 and the two ports of the two-way valve 527. Alternatively, when receiving a replenishment request message, the charging pile 500 can open the replenishment channel M2 by opening the channel between the two ports of the two-way valve 526. This helps to meet the heat dissipation or replenishment needs of electric vehicles.

[0102] For example, two-way valves 526 and 527 may be solenoid valves.

[0103] Figure 4 This is a schematic diagram of another charging system 30 provided in an embodiment of this application. It should be noted that, for ease of understanding, Figure 4 In the diagram, dashed lines represent power transmission lines, while solid lines represent pipeline connections used for the flow of coolant, refrigerant, etc.

[0104] and Figure 2 and Figure 3 The return channel 5232 shown is connected to the inlet 52212 of the coolant channel via the first reservoir 521, which is different from the case shown. Figure 4 In the charging pile 500 shown, the outlet 52211 of the coolant channel is connected to the drain channel 5231 through the first reservoir 521. The first inlet 5212 of the first reservoir is connected to the outlet 52211 of the coolant channel, and the outlet 5211 of the first reservoir is connected to the drain channel 5231 to form a replenishment channel M2.

[0105] Based on the above design, the first liquid storage tank 521 can be connected in series to the heat dissipation channel M1 between the drain channel 5231 and the return channel 5232, so that the liquid storage tank 521 serves as the cold water tank for the heat dissipation channel M1. In this way, the coolant in the coolant channel 5221, after being cooled, can flow into the first liquid storage tank 521 in advance for storage. When the power battery 410 of the electric vehicle 400 needs to dissipate heat, the coolant stored in the first liquid storage tank 521 can quickly flow into the electric vehicle 400 through the drain channel 5231, thereby improving the heat dissipation efficiency of the power battery 410 of the electric vehicle 400.

[0106] Furthermore, the replenishment channel M2 may include a channel connecting the first outlet 5211 of the first liquid storage tank and the drain channel 5231. That is, a portion of the heat dissipation channel M1 serves as the replenishment channel M2. This allows the charging pile 500 to replenish the liquid storage tank of the electric vehicle 400 without requiring a separate drain outlet to be connected to the drain channel 5231 in the first liquid storage tank 521, thereby reducing the complexity of the channel design in the charging pile 500.

[0107] Figure 5 This is an example provided in the embodiments of this application. Figure 4 The diagram shows the specific structure of the charging system 30.

[0108] See Figure 5In some embodiments, when the outlet 52211 of the coolant channel is connected to the drain channel 5231 through the first reservoir 521, the two-way valve 526 is used to open the channel between the first outlet 5211 of the first reservoir and the drain channel 5231, and the two-way valve 527 is used to open the channel between the return channel 5232 and the inlet 52212 of the coolant channel.

[0109] Specifically, in two-way valve 526, the first valve port 5261 is connected to the first outlet 5211 of the first liquid storage tank, and the second valve port 5262 is connected to the drain channel 5231. In two-way valve 527, the first valve port 5271 is connected to the inlet 52212 of the coolant channel, and the second valve port 5272 is connected to the return channel 5232.

[0110] Based on the above design, the charging pile 500 can open the heat dissipation channel M1 or the liquid replenishment channel M2 by adjusting the on / off state between the two valve ports of the two-way valve 526 and the two-way valve 527. For detailed description, please refer to... Figure 3 The relevant descriptions of the embodiments shown will not be repeated here.

[0111] Continue reading Figure 5 In some embodiments, the charging pile 500 is also used to: control the compressor 5241 to stop working upon receiving a liquid replenishment request message.

[0112] Specifically, when the coolant outlet 52211 of the coolant passage is connected to the drain passage 5231 via the first reservoir 521, the coolant flowing out of the first outlet 5211 of the first reservoir can flow directly into the electric vehicle without passing through the coolant passage 5221. Therefore, when the charging station 500 is replenishing the coolant in the reservoir of the electric vehicle 400, the compressor 5241 can be turned off to stop cooling the coolant in the coolant passage 5221. This helps reduce the energy consumption of the charging station 500.

[0113] Continue reading Figure 5 In some embodiments, the second outlet 5213 of the first liquid storage tank is connected to the inlet 52212 of the coolant channel.

[0114] Based on the above design, the first liquid storage tank 521 can form a cooling circulation loop with the coolant channel 5221 through the first liquid inlet 5212 and the second liquid outlet 52211 of the first liquid storage tank. Thus, through the circulation of coolant between the first liquid storage tank 521 and the coolant channel 5221, the first heat exchanger 522 can cool the coolant in the first liquid storage tank 521.

[0115] Specifically, when the first coolant reservoir 521 is not discharging coolant into the drain channel 5231, the coolant in the first coolant reservoir 521 can flow into the coolant channel 5221 through the second outlet 5213 for cooling, and then flow back into the first coolant reservoir 521 through the first inlet 5212. This allows the coolant in the first coolant reservoir 521 to maintain a lower temperature, thereby improving the coolant storage capacity of the first coolant reservoir 521. This is beneficial for improving the timeliness and effectiveness of the charging pile 500 in cooling the power battery 410 of the electric vehicle 400.

[0116] In specific implementations, some embodiments, such as Figure 5 As shown, the liquid cooling device 520 also includes a three-way valve 528. The first valve port 5281 of the three-way valve is connected to the inlet port 52212 of the coolant channel, the second valve port 5282 of the three-way valve is connected to the return channel 5232, and the third valve port 5283 of the three-way valve is connected to the second outlet port 5213 of the first liquid storage tank.

[0117] Based on the above design, the flow path of the coolant can be switched by adjusting the on / off state between different valve ports of the three-way valve 528, so that the refrigerant passage 5222 can exchange heat with the coolant flowing out of the electric vehicle 400, or the refrigerant passage 5222 can exchange heat with the coolant flowing out of the first liquid tank 521.

[0118] For example, in one example, the three-way valve 528 is used to: open the passage between the second outlet 5213 of the first liquid reservoir and the inlet 52212 of the coolant channel when the first outlet 5211 of the first liquid reservoir is not discharging coolant.

[0119] Specifically, when the first coolant reservoir 521 is not supplying coolant to the electric vehicle 400, the charging pile 500 can open the passage between the first valve port 5281 and the third valve port 5283 of the three-way valve, and close the passage between the first valve port 5281 and the second valve port 5282 of the three-way valve. This allows the coolant passage 5221 to cool the coolant in the first coolant reservoir 521, thereby improving the cold storage capacity of the first coolant reservoir 521.

[0120] In another example, the three-way valve 528 is used to: open the passage between the return passage 5232 and the inlet 52212 of the coolant passage when the charging connector 511 outputs electrical energy to the electric vehicle 400 and the first outlet 5211 of the first reservoir outputs coolant.

[0121] Specifically, when the charging station 500 is charging the power battery 410 of the electric vehicle 400, the first coolant tank 521 provides coolant to the electric vehicle 400 to dissipate heat from the power battery 410. In this situation, the charging station 500 can open the passage between the first valve port 5281 and the second valve port 5282 of the three-way valve, and close the passage between the first valve port 5281 and the third valve port 5283 of the three-way valve. This allows the refrigerant passage 5222 to exchange heat only with the coolant flowing out of the electric vehicle 400, thereby improving the efficiency of the first heat exchanger 522 in dissipating heat from the power battery 410 of the electric vehicle 400.

[0122] The above describes the specific structure of the charging pile 500 in the charging system 30. The following describes the specific structure of the electric vehicle 400 in the charging system 30.

[0123] Combination Figures 2 to 5 In some embodiments, the electric vehicle 400 further includes a thermal management system 420, and the power battery 410 further includes a liquid cooling channel 412. The liquid cooling channel 412 is used for heat exchange with the battery pack 411, and the thermal management system 420 is used to cool the coolant flowing out of the liquid cooling channel 412. The outlet of the thermal management system 420 is connected to the inlet 4121 of the liquid cooling channel, and the outlet 4122 of the liquid cooling channel is connected to the inlet of the thermal management system 420.

[0124] Based on the above design, an in-vehicle cooling circuit can be formed between the liquid cooling channel 412 and the thermal management system 420, allowing the coolant to circulate between the liquid cooling channel 412 and the thermal management system 420 through this circuit. In practical applications, after absorbing heat generated by the battery pack 411 in the liquid cooling channel 412, the coolant can flow into the thermal management system 420 for cooling. The cooled coolant can then flow back into the liquid cooling channel 412, thus achieving heat dissipation from the power battery 410 by the thermal management system 420.

[0125] For example, the liquid cooling channel 412 can be a liquid cooling plate with a coolant flow channel, or an immersion heat exchanger. It should be understood that the specific structure of the liquid cooling channel 412 described above is only illustrative. In the embodiments of this application, it is sufficient as long as the liquid cooling channel 412 can circulate coolant and achieve heat exchange with the battery pack 411.

[0126] In some embodiments, the liquid inlet 4121 of the liquid cooling channel is also connected to the liquid injection port 441 of the electric vehicle, and the liquid outlet 4122 of the liquid cooling channel is also connected to the liquid outlet 442 of the electric vehicle.

[0127] Based on the above design, with the electric vehicle's inlet 441 connected to the outlet 5231 and the outlet 442 connected to the return 5232, the liquid cooling channel 412 can be connected to the coolant channel 5221 of the first heat exchanger 522 in the charging pile 500 to form an external cooling circuit. This allows the coolant in the charging pile 500 to circulate between the coolant channel 5221 and the liquid cooling channel 412 via the external cooling circuit. In practical applications, the coolant output from the coolant channel 5221 can flow into the liquid cooling channel 412 through the electric vehicle's inlet 441 to absorb heat from the battery pack 411. The cooled coolant, after absorbing heat, can flow out of the liquid cooling channel 412 and return to the coolant channel 5221 through the electric vehicle's outlet 442. This achieves heat dissipation for the power battery 410 by the first heat exchanger 522 in the charging pile 500.

[0128] Continue to combine Figures 2 to 5 In some embodiments, the electric vehicle 400 also includes a second coolant reservoir 430 for supplying coolant to in-vehicle passages within the electric vehicle 400, such as for supplying coolant to the in-vehicle cooling circuit between the liquid cooling channel 412 and the thermal management system 420. Furthermore, the second coolant reservoir 430 is also used to receive coolant from the charging station 500 through an outlet 442.

[0129] For example, such as Figure 2 and Figure 4 As shown, the outlet of the thermal management system 420 is connected to the inlet 4121 of the liquid cooling channel via a second liquid storage tank 430. Specifically, the inlet 431 of the second liquid storage tank is connected to the outlet of the thermal management system 420, and the outlet 432 of the second liquid storage tank is connected to the inlet 4121 of the liquid cooling channel.

[0130] Based on the above design, the second coolant reservoir 430 can be connected in series to the in-vehicle cooling circuit between the liquid cooling channel 412 and the thermal management system 420, so that the second coolant reservoir 430 serves as both the supply and return water tank for the in-vehicle cooling circuit. In this way, with the in-vehicle cooling circuit between the liquid cooling channel 412 and the thermal management system 420 connected, the coolant in the second coolant reservoir 430 can circulate among the second coolant reservoir 430, the liquid cooling channel 412, and the thermal management system 420, allowing the thermal management system 420 to utilize the coolant provided by the second coolant reservoir 430 to dissipate heat from the power battery 410.

[0131] Furthermore, since the inlet 4121 of the liquid cooling channel is also connected to the liquid filling port 441 of the electric vehicle, the inlet 431 of the second liquid storage tank can be connected to the liquid filling port 441 of the electric vehicle through the thermal management system 420 and the liquid cooling channel 412, thereby forming an external liquid replenishment channel for the second liquid storage tank 430. In this way, when the liquid filling port 441 of the electric vehicle is connected to the drain channel 5231, the coolant output from the first liquid storage tank 521 in the charging pile 500 can be transported to the inlet 431 of the first liquid storage tank through the liquid filling port 441 of the electric vehicle, the liquid cooling channel 412 and the thermal management system 420, thereby realizing the replenishment of the second liquid storage tank 430 of the electric vehicle by the first liquid storage tank 521 in the charging pile 500.

[0132] It should be understood that the connection between the liquid outlet of the thermal management system 420 and the liquid inlet 4121 of the liquid cooling channel via the second liquid storage tank 430 is merely an example and not a limitation of this application. For example, in some other embodiments, the liquid outlet 4122 of the liquid cooling channel is connected to the liquid inlet of the thermal management system 420 via the second liquid storage tank 430. Specifically, the liquid inlet 431 of the second liquid storage tank is connected to the liquid outlet 4122 of the liquid cooling channel, and the liquid outlet 432 of the second liquid storage tank is connected to the liquid inlet of the thermal management system 420. Furthermore, the liquid inlet 431 of the second liquid storage tank is connected to the liquid filling port 441 of the electric vehicle via the liquid cooling channel 412 to form an external liquid replenishment channel for the second liquid storage tank 430.

[0133] The specific structure of the thermal management system 420 in the electric vehicle 400 will be further described below.

[0134] Combination Figure 3 and Figure 5 In some embodiments, the thermal management system 420 includes a compressor 421, a heat exchanger 422, an expansion valve 423, and a heat exchanger 424 connected in sequence. The heat exchanger 424 includes a coolant passage 4241 and a refrigerant passage 4242, the refrigerant passage 4242 being used for heat exchange with the coolant passage 4241. The refrigerant passage 4242 is connected between the compressor 421 and the expansion valve 423.

[0135] Furthermore, the outlet of the coolant passage 4241 serves as the outlet of the thermal management system 420 and is connected to the inlet 431 of the second reservoir. The inlet of the coolant passage 4241 serves as the inlet of the thermal management system 420 and is connected to the outlet 4122 of the liquid cooling passage. That is, an in-vehicle cooling circuit is formed between the liquid cooling passage 412 and the coolant passage 4241.

[0136] Based on the above design, the refrigerant can circulate along the compressor 421, heat exchanger 422, expansion valve 423 and refrigerant passage 4242 to cool the coolant flowing in the coolant passage 4241, thereby realizing the heat dissipation of the power battery 410 by the thermal management system 420.

[0137] For a detailed description of the thermal management system 420, please refer to the relevant descriptions of the compressor 5241, the second heat exchanger 5242, the expansion valve 5243, and the first heat exchanger 522 in the charging pile 500, which will not be repeated here.

[0138] Continue to combine Figure 3 and Figure 5 In some embodiments, the electric vehicle 400 also includes a water pump 480. The water pump 480 is connected between the outlet of the coolant passage 4241 and the inlet 4121 of the liquid cooling passage, or between the inlet of the coolant passage 4241 and the outlet 4122 of the liquid cooling passage. Thus, the water pump 480 can drive the coolant output from the second reservoir 430 to circulate in the vehicle's cooling circuit between the liquid cooling passage 412 and the coolant passage 4241, thereby enabling the thermal management system 420 to dissipate heat from the power battery 410.

[0139] Continue to combine Figure 3 and Figure 5 In some embodiments, the electric vehicle 400 further includes two three-way valves, namely three-way valve 460 and three-way valve 470. Specifically, for three-way valve 460, the first valve port 461 is connected to the liquid inlet 4121 of the liquid cooling channel, the second valve port 462 is connected to the liquid filling port 441 of the electric vehicle, and the third valve port 463 is connected to the liquid outlet 432 of the second liquid reservoir. For three-way valve 470, the first valve port 471 is connected to the liquid outlet 4122 of the liquid cooling channel, the second valve port 472 is connected to the liquid outlet 442 of the electric vehicle, and the third valve port 473 is connected to the liquid inlet of the coolant channel 4241.

[0140] Based on the above design, by adjusting the on / off state between different ports of each of the three-way valves in the three-way valves 460 and 470, it is possible not only to switch the flow channel of the coolant in the liquid cooling channel 412 to make the in-vehicle cooling circuit between the liquid cooling channel 412 and the coolant channel 4241 connected, or to connect the liquid cooling channel 412 to the electric vehicle's inlet 441 and outlet 442 to make the external cooling circuit between the liquid cooling channel 412 and the first heat exchanger 522 connected, but also to adjust the on / off state of the external replenishment channel between the first inlet 431 of the second reservoir and the electric vehicle's inlet 441, thereby meeting the different needs of the electric vehicle 400.

[0141] The following is based onFigure 5 Taking the charging system 30 shown as an example, the specific process of adjusting the on / off state between different valve ports in the three-way valve 460 and three-way valve 470 mentioned above will be explained.

[0142] Figure 6 This is an example provided in the embodiments of this application. Figure 5 The diagram shows the heat dissipation principle of the power battery 410 of the electric vehicle 400.

[0143] See Figure 6 In some embodiments, when the liquid inlet 441 and return outlet 442 of the electric vehicle 400 are not connected to the charging pile 500, for example, when the electric vehicle 400 is in normal driving, the three-way valve 460 is used to open the channel between the liquid inlet 4121 of the liquid cooling channel and the liquid outlet 432 of the second reservoir, and the three-way valve 470 is used to open the channel between the liquid outlet 4122 of the liquid cooling channel and the liquid inlet of the coolant channel 4241, so that the electric vehicle 400 uses the in-vehicle cooling circuit formed by the liquid cooling channel 412 and the coolant channel 4241 to dissipate heat from the power battery 410.

[0144] Specifically, the electric vehicle 400 can control the passage between the first valve port 461 and the third valve port 463 of the three-way valve 460 to be open, and the passage between the first valve port 461 and the second valve port 462 of the three-way valve to be closed. It also controls the passage between the first valve port 471 and the third valve port 473 of the three-way valve 470 to be open, and the passage between the first valve port 471 and the second valve port 472 of the three-way valve to be closed. Thus, the liquid inlet 4121 of the liquid cooling passage is connected to the liquid inlet of the coolant passage 4241 through the three-way valve 460.

[0145] Based on the above design, the coolant can circulate between the liquid cooling channel 412 and the coolant channel 4241, thereby realizing the heat dissipation of the power battery 410 by the thermal management system 420.

[0146] When the thermal management system 420 dissipates heat from the power battery 410, the flow direction of the coolant and refrigerant in the electric vehicle 400 is as follows: Figure 6 As shown by the thick arrow in the image.

[0147] Figure 7 This is another example provided in the embodiments of this application. Figure 5 The diagram shows the heat dissipation principle of the power battery 410 of the electric vehicle 400.

[0148] See Figure 7In some embodiments, the liquid inlet 441 of the electric vehicle is connected to the drain channel 5231 of the charging pile 500, and the liquid outlet 442 of the electric vehicle is connected to the return channel 5232 of the charging pile 500. Before the power battery 410 starts charging, the three-way valve 460 is used to open the channel between the liquid inlet 4121 of the liquid cooling channel and the liquid inlet 441 of the electric vehicle, and the three-way valve 470 is used to open the channel between the liquid outlet 4122 of the liquid cooling channel and the liquid outlet 442 of the electric vehicle. This allows the electric vehicle 400 to use the external cooling circuit formed by the liquid cooling channel 412 and the coolant channel 5221 of the first heat exchanger 522 to dissipate heat from the power battery 410 during the subsequent charging process of the power battery 410.

[0149] Specifically, before the charging pile 500 starts charging the power battery 410, the electric vehicle 400 can, after confirming that the electric vehicle's inlet 441 is connected to the charging pile 500's drain channel 5231 and the electric vehicle's outlet 442 is connected to the charging pile 500's return channel 5232, control the passage between the first valve port 461 and the second valve port 462 of the three-way valve 460 to be open, and the passage between the first valve port 461 and the third valve port 463 of the three-way valve to be closed. It also controls the passage between the first valve port 471 and the second valve port 472 of the three-way valve 470 to be open, and the passage between the first valve port 471 and the third valve port 473 of the three-way valve to be closed, thereby opening the external cooling circuit between the liquid cooling channel 412 and the coolant channel 5221.

[0150] Based on the above design, when the power battery 410 begins high-power fast charging through the charging pile 500, the coolant provided by the coolant channel 5221 can circulate between the coolant channel 5221 and the liquid cooling channel 412 through the external cooling circuit, thereby achieving heat dissipation of the power battery 410 by the first heat exchanger 522 in the charging pile 500. This helps meet the heat dissipation requirements of the power battery 410 during high-power fast charging, thus improving the efficiency and safety of the charging pile 500 in charging the electric vehicle 400.

[0151] In specific implementations, in some embodiments, the electric vehicle 400 is used to send a heat dissipation request message to the charging pile 500 when the external cooling circuit between the liquid cooling channel 412 and the coolant channel 5221 is already connected. Correspondingly, upon receiving the heat dissipation request message sent by the electric vehicle 400, the charging pile 500 connects the heat dissipation channel M1. For a detailed description, please refer to the above. Figures 2 to 5 The relevant descriptions shown will not be repeated here.

[0152] When the first heat exchanger 522 in the charging pile 500 dissipates heat from the power battery 410, the flow direction of the coolant and refrigerant in the charging pile 500 and the electric vehicle 400 is as follows: Figure 7 As shown by the thick arrow in the image.

[0153] In some embodiments, the charging pile 500 is also used to: output electrical energy to the electric vehicle 400 through the charging connector 511 when the heat dissipation channel M1 is connected, and disconnect the heat dissipation channel M1 after the charging connector 511 has finished outputting electrical energy to the electric vehicle 400.

[0154] Specifically, such as Figure 7 As shown, after receiving a heat dissipation request message from the electric vehicle 400, the charging pile 500 first controls the passage between the two valve ports of the two-way valve 526 and the passage between the two valve ports of the two-way valve 527 to open the heat dissipation passage M1. Then, the charging pile 500 controls multiple charging modules 512 to output electrical energy to the electric vehicle 400 through the charging connector 511. This improves the reliability of the charging pile 500 in dissipating heat from the power battery 410 during charging through the heat dissipation passage M1, thus helping to meet the heat dissipation requirements of the power battery 410 during high-power fast charging.

[0155] When the charging pile 500 finishes charging the electric vehicle 400, the charging pile 500 controls the passage between the two valve ports of the two-way valve 526 and the passage between the two valve ports of the two-way valve 527 to disconnect, thereby preventing the coolant in the heat dissipation passage M1 from leaking from the drain passage 5231 and the return passage 5232 when the connection between the drain passage 5231 and the return passage 5232 and the electric vehicle 400 is disconnected.

[0156] Figure 8 This is an example provided in the embodiments of this application. Figure 5 The diagram shows the replenishment principle of the second liquid storage tank 430 of the electric vehicle 400.

[0157] See Figure 8 In some embodiments, the liquid inlet 441 of the electric vehicle is connected to the drain channel 5231 of the charging pile 500, and after the power battery 410 is charged, the three-way valve 460 is used to open the channel between the liquid inlet 4121 of the liquid cooling channel and the liquid inlet 441 of the electric vehicle, and the three-way valve 470 is used to open the channel between the liquid outlet 4122 of the liquid cooling channel and the liquid inlet of the coolant channel 4241, thereby opening the external liquid replenishment channel between the liquid inlet 441 of the electric vehicle and the liquid inlet 431 of the second reservoir.

[0158] Specifically, after the power battery 410 has finished charging, the electric vehicle 400 can control the passage between the first valve port 461 and the second valve port 462 of the three-way valve 460 to be opened and the passage between the first valve port 461 and the third valve port 463 of the three-way valve to be closed when it detects that the second reservoir 430 needs to be replenished. It can also control the passage between the first valve port 471 and the third valve port 473 of the three-way valve 470 to be opened and the passage between the first valve port 471 and the second valve port 472 of the three-way valve to be closed.

[0159] Based on the above design, the coolant provided by the first liquid storage tank 521 in the charging pile 500 can be transported to the inlet 431 of the second liquid storage tank through the liquid injection port 441 of the electric vehicle, the three-way valve 460, the liquid cooling channel 412 and the coolant channel 4241, thereby realizing the replenishment of the second liquid storage tank 430 by the charging pile 500.

[0160] In specific implementations, in some embodiments, the electric vehicle 400 is also used to send a replenishment request message to the charging pile 500 when the external replenishment channel between the electric vehicle's fluid inlet 441 and the second fluid reservoir's inlet 431 is already open. Correspondingly, upon receiving the replenishment request message from the electric vehicle 400, the charging pile 500 opens the replenishment channel M2. For example, after receiving the replenishment request message, the charging pile 500 can control the channel between the two ports of the two-way valve 526 to open the replenishment channel M2. For a more detailed description, please refer to the above. Figures 2 to 5 The relevant descriptions shown will not be repeated here.

[0161] When the first coolant reservoir 521 of the charging pile 500 replenishes the second coolant reservoir 430 of the electric vehicle 400, the flow direction of the coolant in the charging pile 500 and the electric vehicle 400 is as follows: Figure 8 As shown by the thick arrow in the image.

[0162] Furthermore, in one example, if the coolant replenishment request message sent by the electric vehicle 400 includes a message indicating the coolant capacity required by the electric vehicle 400 for the charging station 500, the charging station 500 can disconnect the coolant replenishment channel M2 after outputting the coolant capacity indicated in the message, thereby stopping the replenishment of the second reservoir 430.

[0163] The other structures in the charging system 30 will be further described below.

[0164] Figure 9 This is a schematic diagram of another charging system 30 provided in the embodiments of this application.

[0165] and Figures 2 to 8The first liquid storage tank 521 in the charging pile 500 shown is connected in series with the coolant passage 5221 of the first heat exchanger 522, which is different from the case where... Figure 9 In the embodiment shown, the first liquid storage tank 521 and the first heat exchanger 522 are each set independently.

[0166] Specifically, in some embodiments, such as Figure 9 As shown, the liquid cooling device 520 also includes a three-way valve 529. The drain port 5214 of the first liquid storage tank is connected to the drain channel 5231 via the three-way valve 529 to form a replenishment channel M2. The three-way valve 529 is used to open the channel between the coolant outlet 52211 and the drain channel 5231, or to open the channel between the drain port 5214 of the first liquid storage tank and the drain channel 5231.

[0167] The three-way valve has its first port 5291 connected to the drain channel 5231, its second port 5292 connected to the coolant outlet 52211, and its third port 52212 connected to the drain outlet 5214 of the first reservoir. In other words, the replenishment channel M2 includes a channel connecting the drain outlet 5214 of the first reservoir and the third port 5293 of the three-way valve, as well as a channel connecting the first port 5291 of the three-way valve and the drain channel 5231.

[0168] Based on the above design, the drain port 5214 of the first liquid storage tank and the outlet port 52211 of the coolant passage of the first heat exchanger 522 are each connected to the drain channel 5231 via a three-way valve 529. In practical applications, by adjusting the on / off state of different ports of the three-way valve 529, the drain channel 5231 can either deliver the coolant flowing from the drain port 5214 of the first liquid storage tank to the electric vehicle 400, or deliver the coolant flowing from the coolant passage 5221 to the electric vehicle 400. This helps ensure that the first liquid storage tank 521 replenishes the second liquid storage tank 430 of the electric vehicle, and the first heat exchanger 522 cools the power battery 410 of the electric vehicle 400 independently, thereby improving the reliability of the charging pile 500 in cooling and replenishing the electric vehicle 400.

[0169] Furthermore, since the first liquid storage tank 521 and the first heat exchanger 522 are each set independently, when the first liquid storage tank 521 is replenishing the coolant for the electric vehicle 400, the compressor in the charging pile 500 used to cool the coolant flowing in the first heat exchanger 522, as well as the water pump used to drive the coolant to flow in the first heat exchanger 522, can all be shut down, which helps to reduce the energy consumption of the charging pile 500.

[0170] For example, in some embodiments, combined with Figure 3 and Figure 9When the drain port 5214 of the first liquid storage tank is connected to the drain channel 5231 via the three-way valve 529 to form the replenishment channel M2, the charging pile 500 is also used to: control the compressor 5241 to stop working when a replenishment request message is received. This helps to reduce the energy consumption of the charging pile 500.

[0171] It should be understood that, regarding Figure 9 For details regarding the charging system 30 shown, please refer to [link / reference needed]. Figures 2 to 8 The relevant descriptions of the embodiments shown will not be repeated here.

[0172] This application embodiment also provides a liquid cooling device, which includes a liquid storage tank, a first heat exchanger, a drain channel, a return channel, a heat dissipation channel, and a replenishment channel. The first heat exchanger includes a coolant channel. The drain channel is used to connect to the filler port of an electric vehicle, and the return channel is used to connect to the outlet port of the electric vehicle. The liquid cooling device is configured to: activate the heat dissipation channel when the drain channel is connected to the filler port of the electric vehicle, the return channel is connected to the outlet port of the electric vehicle, and a heat dissipation request message is received from the electric vehicle. The heat dissipation channel is used to transport coolant flowing out of the coolant channel to the electric vehicle through the drain channel and to transport coolant flowing out of the electric vehicle back to the coolant channel through the return channel. The heat dissipation request message includes at least one of the following messages: a message instructing the liquid cooling device to dissipate heat from the electric vehicle, a message instructing the electric vehicle to request a specific flow rate of coolant from the liquid cooling device, and a message instructing the electric vehicle to request a specific temperature of coolant from the liquid cooling device. The liquid cooling system is also used to: connect the drain channel to the electric vehicle's coolant inlet, and activate the replenishment channel upon receiving a replenishment request message from the electric vehicle. The replenishment channel is used to transport coolant flowing from the reservoir to the electric vehicle through the drain channel. The replenishment request message includes at least one of the following: a message instructing the liquid cooling system to replenish coolant in the electric vehicle, and a message indicating the electric vehicle's required coolant capacity from the liquid cooling system.

[0173] It should be understood that a detailed description of the liquid cooling equipment can be found in [reference needed]. Figures 2 to 9 The description of the liquid cooling device 520 in the illustrated embodiment will not be repeated here.

[0174] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A charging pile, characterized in that, The charging pile comprises a charging connector, a liquid storage tank, a first heat exchanger, a liquid discharge channel, a liquid return channel, a heat dissipation channel and a liquid supplement channel, the first heat exchanger comprises a cooling liquid channel, the charging connector is used for outputting electric energy to an electric vehicle, the liquid discharge channel is used for connecting a liquid injection port of the electric vehicle, and the liquid return channel is used for connecting a liquid outlet port of the electric vehicle; The charging pile is used for: when the liquid discharge channel connects the liquid injection port of the electric vehicle, the liquid return channel connects the liquid outlet port of the electric vehicle, and a heat dissipation request message sent by the electric vehicle is received, the heat dissipation channel is turned on, the heat dissipation channel is used for conveying the cooling liquid flowing out of the cooling liquid channel to the electric vehicle through the liquid discharge channel and conveying the cooling liquid flowing out of the electric vehicle to the cooling liquid channel through the liquid return channel, and the heat dissipation request message comprises at least one of the following messages: a message used for indicating that the charging pile dissipates heat for the electric vehicle, a message used for indicating a required flow of the cooling liquid of the electric vehicle for the charging pile, and a message used for indicating a required temperature of the cooling liquid of the electric vehicle for the charging pile; or The charging pile is further used for: when the liquid discharge channel connects the liquid injection port of the electric vehicle and a liquid supplement request message sent by the electric vehicle is received, the liquid supplement channel is turned on, the liquid supplement channel is used for conveying the cooling liquid flowing out of the liquid storage tank to the electric vehicle through the liquid discharge channel, and the liquid supplement request message comprises at least one of the following messages: a message used for indicating that the charging pile supplements liquid for the electric vehicle, and a message used for indicating a required capacity of the cooling liquid of the electric vehicle for the charging pile.

2. The charging post of claim 1, wherein, The liquid outlet port of the cooling liquid channel is connected to the liquid discharge channel through the liquid storage tank, wherein the liquid inlet port of the liquid storage tank is connected to the liquid outlet port of the cooling liquid channel, the liquid outlet port of the liquid storage tank is connected to the liquid discharge channel to form the liquid supplement channel; or The liquid return channel is connected to the liquid inlet port of the cooling liquid channel through the liquid storage tank, wherein the liquid inlet port of the liquid storage tank is connected to the liquid return channel, the liquid outlet port of the liquid storage tank is connected to the liquid inlet port of the cooling liquid channel, and the liquid outlet port of the liquid storage tank is connected to the liquid discharge channel through the cooling liquid channel to form the liquid supplement channel.

3. The charging post of claim 2, wherein, The charging pile comprises two two-way valves; In the case that the liquid outlet port of the cooling liquid channel is connected to the liquid discharge channel through the liquid storage tank, one of the two-way valves is used for turning on the channel between the liquid outlet port of the liquid storage tank and the liquid discharge channel, and the other of the two-way valves is used for turning on the channel between the liquid return channel and the liquid inlet port of the cooling liquid channel; or In the case that the liquid return channel is connected to the liquid inlet port of the cooling liquid channel through the liquid storage tank, the one of the two-way valves is used for turning on the channel between the liquid outlet port of the cooling liquid channel and the liquid discharge channel, and the other of the two-way valves is used for turning on the channel between the liquid return channel and the liquid inlet port of the liquid storage tank.

4. The charging post according to claim 2 or 3, characterized in that, The charging pile further comprises a compressor, an expansion valve and a second heat exchanger, and the first heat exchanger further comprises a refrigerant channel; wherein The outlet of the cooling liquid channel is connected to the liquid discharge channel through the liquid storage tank, and the compressor, the refrigerant channel, the expansion valve and the second heat exchanger are sequentially connected, and the refrigerant channel is used for heat exchange with the cooling liquid channel; The charging pile is further configured to: control the compressor to stop working when the liquid supplement request message is received.

5. The charging station of claim 1, wherein, The charging pile further comprises a three-way valve, and the liquid discharge outlet of the liquid storage tank is connected to the liquid discharge channel through the three-way valve to form the liquid supplement channel; The three-way valve is used for conducting the channel between the outlet of the cooling liquid channel and the liquid discharge channel, or the three-way valve is used for conducting the channel between the liquid discharge outlet of the liquid storage tank and the liquid discharge channel.

6. The charging post of claim 5, wherein, The charging pile further comprises a compressor, an expansion valve and a second heat exchanger, and the first heat exchanger further comprises a refrigerant channel; wherein, The compressor, the refrigerant channel, the expansion valve and the second heat exchanger are sequentially connected, and the refrigerant channel is used for heat exchange with the cooling liquid channel; The charging pile is further configured to: control the compressor to stop working when the liquid supplement request message is received.

7. The charging post according to any one of claims 1 to 6, characterized in that, The charging pile is further configured to: When the heat dissipation channel is conducted, the charging connector is used for outputting electric energy to the electric vehicle; After the charging connector stops outputting electric energy to the electric vehicle, the heat dissipation channel is disconnected.

8. A liquid cooling device, characterized by, The liquid cooling device comprises a liquid storage tank, a first heat exchanger, a liquid discharge channel, a liquid return channel, a heat dissipation channel and a liquid supplement channel, the first heat exchanger comprises a cooling liquid channel, the liquid discharge channel is used for connecting the liquid injection port of the electric vehicle, and the liquid return channel is used for connecting the liquid outlet port of the electric vehicle; The liquid cooling device is configured to: when the liquid discharge channel connects the liquid injection port of the electric vehicle, the liquid return channel connects the liquid outlet port of the electric vehicle, and a heat dissipation request message sent by the electric vehicle is received, the heat dissipation channel is conducted, the heat dissipation channel is used for conveying the cooling liquid flowing out of the cooling liquid channel to the electric vehicle through the liquid discharge channel, and conveying the cooling liquid flowing out of the electric vehicle to the cooling liquid channel through the liquid return channel, and the heat dissipation request message comprises at least one of the following messages: A message for indicating that the liquid cooling device cools the electric vehicle, a message for indicating the required flow of the cooling liquid of the electric vehicle to the liquid cooling device, and a message for indicating the required temperature of the cooling liquid of the electric vehicle to the liquid cooling device; The liquid cooling device is further configured to: when the liquid discharge channel connects the liquid injection port of the electric vehicle, and a liquid supplement request message sent by the electric vehicle is received, the liquid supplement channel is conducted, the liquid supplement channel is used for conveying the cooling liquid flowing out of the liquid storage tank to the electric vehicle through the liquid discharge channel, and the liquid supplement request message comprises at least one of the following messages: A message for indicating that the liquid cooling device supplements the liquid of the electric vehicle, and a message for indicating the required capacity of the cooling liquid of the electric vehicle to the liquid cooling device.

9. The liquid cooling device of claim 8, wherein, The outlet of the cooling liquid channel is connected to the liquid discharge channel through the liquid storage tank, wherein the inlet of the liquid storage tank is connected to the outlet of the cooling liquid channel, the outlet of the liquid storage tank is connected to the liquid discharge channel to form the liquid supplement channel; or The liquid return channel is connected to the inlet of the cooling liquid channel through the liquid storage tank, wherein the inlet of the liquid storage tank is connected to the liquid return channel, the outlet of the liquid storage tank is connected to the inlet of the cooling liquid channel, and the outlet of the liquid storage tank is connected to the liquid discharge channel through the cooling liquid channel to form the liquid supplement channel.

10. The liquid cooling device of claim 9, wherein, The liquid cooling device comprises two two-way valves; In the case that the outlet of the cooling liquid channel is connected to the liquid discharge channel through the liquid storage tank, one of the two-way valves is used to conduct the channel between the outlet of the liquid storage tank and the liquid discharge channel, and the other of the two-way valves is used to conduct the channel between the liquid return channel and the inlet of the cooling liquid channel; or In the case that the liquid return channel is connected to the inlet of the cooling liquid channel through the liquid storage tank, the one of the two-way valves is used to conduct the channel between the outlet of the cooling liquid channel and the liquid discharge channel, and the other of the two-way valves is used to conduct the channel between the liquid return channel and the inlet of the liquid storage tank.

11. The liquid cooling device according to claim 9 or 10, characterized in that, The liquid cooling device further comprises a compressor, an expansion valve and a second heat exchanger, and the first heat exchanger further comprises a refrigerant channel; The outlet of the cooling liquid channel is connected to the liquid discharge channel through the liquid storage tank, the compressor, the refrigerant channel, the expansion valve and the second heat exchanger are sequentially connected, and the refrigerant channel is used to exchange heat with the cooling liquid channel; The liquid cooling device is further used to control the compressor to stop working when the liquid supplement request message is received.

12. The liquid cooling device of claim 8, wherein, The liquid cooling device further comprises a three-way valve, and the liquid discharge outlet of the liquid storage tank is connected to the liquid discharge channel through the three-way valve to form the liquid supplement channel; The three-way valve is used to conduct the channel between the outlet of the cooling liquid channel and the liquid discharge channel, or the three-way valve is used to conduct the channel between the liquid discharge outlet of the liquid storage tank and the liquid discharge channel.

13. The liquid cooling device of claim 12, wherein, The liquid cooling device further comprises a compressor, an expansion valve and a second heat exchanger, and the first heat exchanger further comprises a refrigerant channel; wherein The compressor, the refrigerant channel, the expansion valve and the second heat exchanger are sequentially connected, and the refrigerant channel is used to exchange heat with the cooling liquid channel; The liquid cooling device is further used to control the compressor to stop working when the liquid supplement request message is received.

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