Charging terminal

Abstract

A charging terminal comprises a charging pile and a liquid cooling charging gun connected with the charging pile. The charging pile comprises a first heating device and a cooling liquid distribution unit. A flow channel is arranged in the first heating device. The cooling liquid distribution unit comprises a liquid outlet port and a liquid return port. The liquid cooling charging gun is provided with a liquid cooling channel, and the liquid cooling channel comprises an input port and an output port. The cooling liquid distribution unit is used for providing cooling liquid for the flow channel and the liquid cooling channel. The flow channel and the liquid cooling channel are communicated in series. The liquid outlet port is communicated with the flow channel so as to supply cooling liquid to the flow channel, and the liquid return port is communicated with the output port of the liquid cooling channel so as to recover the cooling liquid. According to the charging terminal provided by the invention, the effective heat dissipation of the charging terminal can be realized under the conditions of lower cost and smaller size.

Description

Technical Field

[0001] This application relates to a charging terminal, and particularly to a liquid-cooled charging terminal. Background Art

[0002] When the charging terminal is working, devices such as relays, shunt resistors, and terminal posts arranged inside the charging pile usually generate heat. As the charging power of the charging terminal continuously increases, the total power of the heat-generating devices inside the charging pile also increases, and the amount of heat generated increases significantly. This poses higher requirements for the heat dissipation of the charging terminal. How to improve the heat dissipation efficiency of the charging terminal at a lower cost has always been the focus of research. Summary of the Invention

[0003] An embodiment of this application provides a charging terminal, including a charging pile and a liquid-cooled charging gun. The charging pile includes a first heat-generating device and a coolant distribution unit. A flow channel is provided in the first heat-generating device. The coolant distribution unit includes an outlet port and a return port. The liquid-cooled charging gun is connected to the charging pile, and the liquid-cooled charging gun is provided with a liquid-cooled channel, and the liquid-cooled channel includes an input port and an output port. The coolant distribution unit is used to supply coolant to the flow channel and the liquid-cooled channel. The flow channel and the liquid-cooled channel are connected in series. The outlet port is connected to the flow channel to supply coolant to the flow channel, and the return port is connected to the output port of the liquid-cooled channel to recover the coolant.

[0004] In the charging terminal of the embodiment of this application, through the built-in coolant distribution unit in the charging pile, coolant is not only provided for the liquid-cooled channel of the liquid-cooled charging gun, but also for the flow channel of the first heat-generating device inside the charging pile. In this way, there is no need to additionally set up a fan for air-cooling the first heat-generating device, which can reduce the power cost for powering the fan, and then reduce the cost of the entire charging terminal. Further, due to the need not to additionally set up air-cooling with a fan, the housing of the charging terminal does not need to be enlarged in size to assist the natural convection heat dissipation of the fan. At the same charging power, the size of the charging terminal is smaller, which can improve the deployment efficiency of the charging terminals in charging stations or parking lots.

[0005] In some embodiments of this application, the inner diameter of the flow channel of the first heat-generating device is larger than the inner diameter of the liquid-cooled channel.

[0006] With such a setting, the overall flow resistance of the liquid channels in the charging terminal can be made smaller, ensuring that sufficient coolant can flow into the liquid-cooled charging gun. In this case, the charging terminal can directly reuse the coolant distribution unit in the charging pile to dissipate heat for the first heat-generating device and the liquid-cooled charging gun without modifying the coolant distribution unit, which can save the development cost of the charging terminal.

[0007] In some embodiments of the present application, the first heating device is provided with a first connection end and a second connection end. The two ends of the flow channel are respectively communicated with the first connection end and the second connection end. The coolant can flow into the flow channel through the first connection end and flow out of the flow channel through the second connection end. The charging pile includes at least two first heating devices. The flow channels of the at least two first heating devices are connected in series. The first connection end of one of the first heating devices is connected to the liquid outlet port, and the second connection end of another first heating device is connected to the input port of the liquid cooling channel.

[0008] By connecting the flow channels of at least two first heating devices in series and then connecting to the liquid cooling channel, the coolant of the coolant distribution unit sequentially passes through the flow channels of at least two first heating devices, then enters the liquid cooling channel, and finally returns to the coolant distribution unit. In this way, the coolant distribution unit can simultaneously supply coolant to at least two first heating devices and the liquid cooling charging gun.

[0009] In some embodiments of the present application, the first heating device is a copper busbar.

[0010] There are usually many copper busbars arranged inside the charging pile of the charging terminal. In some examples, appropriate thickening treatment can be performed on the copper busbar to provide sufficient space in the copper busbar to set the flow channel, and the increase in the thickness of the copper busbar will not affect the current transmission ability of the copper busbar.

[0011] In some embodiments of the present application, the coolant used in the coolant distribution unit is a non-conductive liquid.

[0012] For the case where the first heating device is made of a conductive material, setting the coolant as a non-conductive liquid can avoid potential safety hazards. For example, the coolant can be a non-conductive synthetic oil or fluorinated liquid.

[0013] In some embodiments of the present application, the first heating device is provided with a first connection end and a second connection end. The two ends of the flow channel are respectively communicated with the first connection end and the second connection end. The coolant can flow into the flow channel from the first connection end and flow out of the flow channel through the second connection end; the first connection end and the second connection end are arranged on different sides of the first heating device. The flow channel of the first heating device branches into at least two sub-flow channels near the first connection end, and the at least two sub-flow channels respectively extend and merge at a position near the second connection end.

[0014] With the flow channel arranged in this way, the sub-flow channels can more conveniently match the edge contour of the first heating device while ensuring the extension length of the flow channel.

[0015] In some embodiments of the present application, the charging pile further includes a second heating device. The second heating device is connected with a heat dissipation cold plate, and a flow channel is arranged in the heat dissipation cold plate; the flow channel of the heat dissipation cold plate is connected in series with the flow channel of the first heating device.

[0016] In some examples, the second heating device may include a relay, a shunt, a terminal post, etc. A heat dissipation cold plate may be connected to the surface of the second heating device, and a flow channel for the coolant to pass through is provided in the heat dissipation cold plate, so as to dissipate heat from the second heating device.

[0017] In some embodiments of the present application, the inner diameter of the flow channel of the heat dissipation cold plate is greater than the inner diameter of the liquid cooling channel.

[0018] With such a setting, the overall flow resistance of the liquid channel in the charging terminal can be made smaller, ensuring that sufficient coolant can flow into the liquid-cooled charging gun. In this case, the charging terminal can directly reuse the coolant distribution unit in the charging pile to dissipate heat from the first heating device and the liquid-cooled charging gun, without modifying the coolant distribution unit, which can save the development cost of the charging terminal.

[0019] In some embodiments of the present application, an insulating thermal conductive material is provided between the second heating device and the heat dissipation cold plate.

[0020] Through the setting of the insulating thermal conductive material, it is effectively avoided that there is an air gap between the second heating device and the heat dissipation cold plate, which affects the heat transfer effect between the heat dissipation cold plate and the second heating device. In this way, the heat from the second heating device is transferred to the heat dissipation cold plate through the thermal conductive material, and the coolant flows through the flow channel of the heat dissipation cold plate, thereby taking away the heat of the second heating device.

[0021] In some embodiments of the present application, the charging pile includes at least two second heating devices, and the heat dissipation cold plate is connected to at least two second heating devices. The heat dissipation cold plate is connected to at least two second heating devices, so as to perform liquid cooling on at least two second heating devices. In this way, the number of heat dissipation cold plates used can be reduced, and the installation difficulty and the cost of the charging terminal can be further reduced. Description of the Drawings

[0022] Figure 1 is a schematic diagram of a charging terminal according to an embodiment of the present application.

[0023] Figure 2 is a cross-sectional schematic diagram of a heating device of a charging terminal according to an embodiment of the present application.

[0024] Figure 3 is a module schematic diagram of a coolant distribution unit according to an embodiment of the present application.

[0025] Figure 4 is a cross-sectional schematic diagram of a liquid-cooled charging gun according to an embodiment of the present application.

[0026] Figure 5 is a three-dimensional schematic diagram of the combination of a heat dissipation cold plate and a heating device according to an embodiment of the present application.

[0027] Figure 6 It is a schematic diagram of a heat dissipation cold plate according to an embodiment of the present application.

[0028] Description of main component symbols Charging terminal 100, charging pile 110, housing 40, liquid-cooled charging gun 10, liquid-cooled channel 11, Input port 112, output port 114, coolant distribution unit 30, accommodation cavity 41, liquid outlet port 310, Liquid return port 320, first heating device 50a, second heating device 50b, connecting pipe 55, heat dissipation cold plate 60, Liquid storage tank 31, pump 33, heat exchange unit 35, control and management unit 37, outer shell 39, flow channels 51, 61, First connection end 52, second connection end 54, first port 62, second port 64, Pipes 20a, 20b, 20c, main body plate 63, flow channel pipe 65, first cable 111, Second cable 113, protective sleeve 115, sub-flow channel 511. Detailed implementation manners

[0029] The charging terminal of the embodiment of the present application can be set in various places such as public parking lots, dedicated parking lots, charging stations, etc., and is used to transmit electric energy to the electric vehicle battery. The charging terminal is usually set on the ground of the parking lot or charging station.

[0030] In the embodiment of the present application, the charging terminal refers to a charging device provided with a charging gun and capable of charging an electric vehicle. The charging terminal can be a fast charging or ultra-fast charging terminal, but is not limited thereto. Due to the large charging power, the charging gun adopts a liquid-cooled heat dissipation method, which is called a liquid-cooled charging gun. The fast charging in the embodiment of the present application can refer to a charging power reaching about 50kW - 350kW. The ultra-fast charging in the embodiment of the present application can refer to a charging power greater than about 360kW, and common powers can be, for example, about 480kW, 600kW, 640kW, and 800kW, etc.

[0031] As Figure 1 shown, the charging terminal 100 of the first embodiment of the present application includes a charging pile 110 and a liquid-cooled charging gun 10 connected to the charging pile 110. The charging pile 110 includes a power supply component (not shown in the figure). The liquid-cooled charging gun 10 is electrically connected to the power supply component. The charging pile 110 includes a housing 40. The housing 40 forms an accommodation cavity 41. The charging pile 110 further includes a coolant distribution unit 30 arranged in the accommodation cavity 41. The liquid-cooled charging gun 10 is partially located in the charging pile 110 and partially located outside the charging pile 110. The liquid-cooled charging gun 10 extends from the accommodation cavity 41 through the housing 40 to the outside of the housing 40.

[0032] The coolant distribution unit 30 is the core device of the liquid cooling solution, responsible for providing cold coolant fluid and recycling the heated coolant for heat exchange, so as to keep the coolant recycled. The coolant distribution unit 30 includes an outlet port 310 and a return port 320. The outlet port 310 is used to output the coolant, and the return port 320 is used to recycle the coolant.

[0033] Please refer to Figure 1 , the charging pile 110 further includes a heating device disposed in the accommodation cavity 41. The heating device can be, for example, a shunt, a circuit breaker, a fuse, a relay, a copper busbar, etc. Referring to Figure 2 , in the embodiment of the present application, the heating device includes at least one first heating device 50a, and a flow channel 51 is provided in the first heating device 50a. In the embodiment of the present application, the first heating device 50a being a copper busbar will be taken as an example for illustration.

[0034] The copper busbar, also known as copper bus, copper busbar or copper busbar for grounding, is made of copper material and is a long conductor with a rectangular or chamfered (rounded) rectangular cross-section, which plays the role of transporting current and connecting electrical equipment in the circuit. The copper busbar is an electrical connection component. In the charging terminal 100, the copper busbar can be connected to at least one of a shunt, a circuit breaker, a fuse, and a relay. When the copper busbar is energized, a large amount of heat will be generated, so it is very necessary to dissipate heat from it.

[0035] As Figure 1 shown, a liquid cooling channel 11 is provided inside the liquid cooling charging gun 10. The liquid cooling channel 11 includes an input port 112 and an output port 114. The coolant enters the liquid cooling channel 11 from the input port 112 and flows out of the liquid cooling channel 11 from the output port 114. The liquid cooling channel 111 can be realized by arranging a liquid cooling pipe. In some embodiments, the liquid cooling charging gun 10 does not need to be provided with a liquid cooling pipe, but a channel for the coolant to flow through can be directly formed inside the liquid cooling charging gun 10.

[0036] In the embodiment of the present application, the coolant distribution unit 30 not only provides coolant for the liquid cooling channel 11 of the liquid cooling charging gun 10, but also provides coolant for the flow channel 51 of the first heating device 50a. In this way, there is no need to additionally provide a fan for air cooling the first heating device 50a, which can reduce the power cost for powering the fan, and then reduce the cost of the entire charging terminal 100. Further, since there is no need to additionally provide air cooling by a fan, the housing 40 of the charging terminal 100 does not need to be enlarged in size to assist the natural convection heat dissipation of the fan. Under the same charging power, the size of the charging terminal is smaller, which can improve the deployment efficiency of the charging terminals in the charging station or parking lot.

[0037] In the embodiment of the present application, the flow channel 51 of the first heating device 50a is in series communication with the liquid cooling channel 11 of the liquid cooling charging gun 10. Moreover, the coolant from the coolant distribution unit 30 first flows into the flow channel 51 of the first heating device 50a, then flows out of the flow channel 51 and enters the liquid cooling channel 11 of the liquid cooling charging gun 10, and finally returns to the coolant distribution unit 30.

[0038] When the charging terminal 100 is working, the liquid cooling charging gun 10 generates more heat. Compared with the liquid cooling charging gun 10, the first heating device 50a generates less heat. After the coolant passes through the flow channel 51 of the first heating device 50a, the temperature of the coolant does not rise much, which will not affect the subsequent cooling effect of the coolant entering the liquid cooling charging gun 10. Therefore, the coolant output by the coolant distribution unit 30 needs to enter the first heating device 50a first and then enter the liquid cooling charging gun 10 to ensure that both the liquid cooling charging gun 10 and the first heating device 50a can be cooled. If the coolant output by the coolant distribution unit 30 is first entered into the liquid cooling charging gun 10, the coolant itself has already risen to a relatively high temperature after flowing out of the liquid cooling charging gun 10. Then, when it enters the flow channel of the first heating device 50a, it cannot effectively cool the first heating device 50a, and may even cause the temperature of the first heating device 50a to rise.

[0039] Please refer to Figure 1 and Figure 2 Figure, the first heating device 50a is further provided with a first connection end 52 and a second connection end 54. The two ends of the flow channel 51 of the first heating device 50a are respectively communicated with the first connection end 52 and the second connection end 54. The flow channel 51 extends from the first connection end 52 towards the second connection end 54.

[0040] When a first heating device 50a is provided with a flow channel 51, the liquid outlet port 310 of the coolant distribution unit 30 is connected to the first connection end 52 through a pipeline, the second connection end 54 is connected to the input port 112 of the liquid cooling channel 11 of the liquid cooling charging gun 10 through a pipeline, and the output port 114 of the liquid cooling channel 11 is connected to the liquid return port 320 of the coolant distribution unit 30 through a pipeline. In this case, the coolant of the coolant distribution unit 30 flows into the flow channel 51 from the first connection end 52, flows out of the flow channel 51 and enters the second connection end 54, enters the liquid cooling channel 11 through the input port 112, flows out of the liquid cooling channel 11 from the output port 114, and finally returns to the coolant distribution unit 30. That is, the coolant from the coolant distribution unit 30 sequentially passes through the flow channel 51 of the first heating device 50a and the liquid cooling channel 11 of the liquid cooling charging gun 10, and finally returns to the coolant distribution unit 30.

[0041] In this way, the coolant flows through the flow channel 51 and the liquid cooling channel 111 in sequence to carry away heat. Finally, the coolant returns to the coolant distribution unit 30, and the heat is dissipated outward through the coolant distribution unit 30.

[0042] In order to ensure that the coolant distribution unit 30 can supply liquid to the first heating device 50a and the liquid cooling charging gun 10 in sequence, in some implementation manners, the inner diameter of the flow channel 51 of the first heating device 50a is larger than the inner diameter of the liquid cooling channel 11 of the liquid cooling charging gun 10. With such a setting, it can be ensured that the flow resistance of the overall liquid channel in the charging terminal 100 increases slightly or does not increase, ensuring that sufficient coolant can flow into the liquid cooling charging gun 10. In this case, the coolant distribution unit 30 can adopt the coolant distribution unit built in the conventional charging pile 110, and there is no need to replace it with a higher-configured coolant distribution unit at all.

[0043] In addition, in order to ensure that there is enough space inside the first heating device 50a to set the flow channel 51, the first heating device 50a in the embodiment of the present application can be thickened on the basis of the conventional heating device, for example, the thickness is increased by 1 cm. For the first heating device 50a being a copper busbar, the increase in thickness will not affect the current transmission ability of the copper busbar.

[0044] It can be understood that the first heating device 50a provided with the flow channel 51 is not limited to the copper busbar, and can also be other electronic devices in the charging pile 110 that can be provided with the flow channel. In this case, the electronic device also needs to be appropriately thickened on the basis of the conventional device to ensure that there is enough space to set the flow channel.

[0045] There are usually many copper busbars arranged inside the charging pile 110 of the charging terminal 100. As Figure 1 shown, in the embodiment of the present application, flow channels 51 are respectively provided in two first heating devices 50a (copper busbars), and the two first heating devices 50a (copper busbars) are spaced apart from each other. The flow channels 51 of the two first heating devices 50a (copper busbars) are connected by a connecting pipe 55, so that the flow channels 51 of the two first heating devices 50a (copper busbars) are connected in series. That is, the first connection end 52 of one of the first heating devices 50a is connected to the liquid outlet port 310 of the coolant distribution unit 30 through a pipe 20a, the second connection end 54 is connected to the first connection end 52 of the other first heating device 50a through a connecting pipe 55, and the second connection end 54 of the other first heating device 50a is connected to the input port 112 of the liquid cooling channel 11 through a pipe 20b.

[0046] In this way, the coolant of the coolant distribution unit 30 sequentially passes through the flow channels 51 of the two first heating devices 50a (copper busbars), then enters the liquid cooling channel 11, and finally returns to the coolant distribution unit 30.

[0047] It can be understood that the number of the first heating devices 50a provided with the flow channels 51 is not limited to one or two, and can also be more than two. The flow channels 51 of different first heating devices 50a are sequentially connected in series through the connecting pipes 55. The first connection end 52 of the first first heating device 50a is connected to the liquid outlet port 310, and the second connection end 54 of the last first heating device 50a is connected to the input port 112 of the liquid cooling channel 11.

[0048] For the first heating device 50a (copper row) that is itself a conductive material, if the coolant is a conductive material, it will inevitably bring great potential safety hazards. Therefore, for the first heating device 50a provided with the flow channel 51, the coolant used by the coolant distribution unit 30 is a non-conductive liquid. For example, the coolant can be a non-conductive synthetic oil or a fluorinated liquid.

[0049] The larger the area occupied by the flow channel 51 in the first heating device 50a, the better the corresponding heat dissipation effect. The positions of the first connection end 52 and the second connection end 54 connecting the flow channel 51 are reasonably set according to the position of the first heating device 50a inside the charging pile 110. Usually, the first connection end 52 and the second connection end 54 are arranged beside / near the components to be lapped, so as to avoid the need to set too long connecting pipes. The shape of the flow channel 51 can be adjusted and designed according to the actual first heating device 50a. In order to ensure that the setting of the flow channel 51 does not affect the function of the first heating device 50a itself, when setting the flow channel 51 in the first heating device 50a, it is necessary to consider matching the shape of the first heating device 50a, such as avoiding holes in the first heating device 50a, and trying to extend the length of the flow channel 51. Figure 2 The figure shows a schematic diagram of the flow channel 51 of the first heating device 50a, but it is not limited thereto. Figure 2 In the figure, the first connection end 52 and the second connection end 54 are located on different sides of the first heating device 50a. The flow channel 51 in the first heating device 50a can branch into at least two sub-flow channels 511 near the first connection end 52, and the two sub-flow channels 511 respectively extend and merge at a position near the second connection end 54. In the embodiment of the present application, setting the sub-flow channels 511 can more conveniently match the edge contour of the first heating device 50a and ensure the extension length of the flow channel 51. It can be understood that the shape of the flow channel 51 in the first heating device 50a in the present application is not limited and can be adjusted and designed according to actual needs.

[0050] The charging terminal 100 according to the embodiment of the present application can, by arranging a flow channel 51 in the first heating device 50a and enabling the coolant of the coolant distribution unit 30 to flow through the flow channel 51 of the first heating device 50a and the liquid cooling channel 11 of the liquid cooling charging gun 10 in sequence, simultaneously meet the liquid cooling heat dissipation requirements of the first heating device 50a and the liquid cooling charging gun 10 on the basis of using a conventional coolant distribution unit 30. The first heating device 50a does not need to be additionally provided with a fan for air cooling heat dissipation, which can reduce the cost of the entire charging terminal 100 to a certain extent, without adding a power module and without expanding the cabinet size of the charging pile 110.

[0051] A partition (not shown in the figure) is usually arranged in the accommodation cavity 41 of the charging pile 110. The partition divides the accommodation cavity 41 into two parts, the upper part and the lower part. The partition can prevent the liquid of the coolant distribution unit 30 from volatilizing and diffusing to the upper part. The coolant distribution unit 30 is usually arranged in the lower part of the accommodation cavity 41. One end of the liquid cooling charging gun 10 is connected to the upper part of the accommodation cavity 41 and passes through the housing 40 and is partially located outside the charging pile 110. The first heating device 50a is located in the upper part of the accommodation cavity 41.

[0052] As Figure 3 shown, in one embodiment, the coolant distribution unit 30 adopts an integrated design, including components such as a liquid storage tank 31, a pump 33 connected to the liquid storage tank 31, a heat exchange unit 35, and a control and management unit 37. The liquid storage tank 31 contains coolant, and the pump 33 is used to extract the coolant in the liquid storage tank 31 to the liquid outlet port 310 and the flow channel. The heat exchange unit 35 includes components such as a heat exchanger and a fan, so as to cool the coolant to the required temperature. The heat exchanger is used to cool the coolant in the liquid storage tank 31, and the fan is used to assist in dissipating heat from the heat exchanger. The control and management unit 37 is used to control each component in the coolant distribution unit 30, such as controlling the liquid storage tank 31, the pump 33, and the heat exchange unit 35.

[0053] As Figure 3 shown, the coolant distribution unit 30 may further include a housing 39, so as to accommodate components such as the liquid storage tank 31, the pump 33, the heat exchange unit 35, and the control and management unit 37 inside the housing 39, playing a role in protecting components such as the liquid storage tank 31, the pump 33, the heat exchange unit 35, and the control and management unit 37.

[0054] In some embodiments, with reference to Figure 1 and Figure 4As shown, the liquid-cooled charging gun 10 further includes a first cable 111 and a second cable 113 with opposite polarities. The first cable 111, the second cable 113, and the liquid-cooling channel 11 are parallel to each other and extend as a bundle, and the accommodation cavity 41 also extends through the housing 40 to the outside of the housing 40. The first cable 111, the second cable 113, and the liquid-cooling channel 11 are wrapped by a protective sleeve 115, and the liquid-cooling channel 11 is closely arranged in contact with the first cable 111 and the second cable 113. Both ends of the first cable 111 and the second cable 113 are respectively connected to terminals (not shown in the figure). In addition, the liquid-cooling channel 11 includes an incoming pipe and a return pipe that extend parallel to the first cable 111, and the flow directions of the coolant in the incoming pipe and the return pipe are opposite. The liquid-cooled charging gun 10 further includes other signal lines wrapped by the protective sleeve 115. Figure 4 Only as a schematic illustration of the internal structure of the liquid-cooled charging gun 10, the internal structure of the liquid-cooled charging gun 10 in this application is not limited to Figure 4 shown.

[0055] Generally, the heat generation of a cable is proportional to the square value of the current. The larger the charging current, the greater the heat generation of the cable. To reduce the heat generation of the cable and avoid overheating, it is necessary to increase the cross-sectional area of the cable, but this will cause the cable to become heavier. The coolant (such as ethylene glycol, oil, etc.) flows through the liquid-cooling channel 11, directly taking away the heat generated by the first cable 111, the second cable 113, and the terminals connected thereto. This method not only has a high heat dissipation efficiency, can enable a small cross-sectional cable to carry a large current and maintain a low temperature rise, greatly improving the safety of charging. Moreover, since the cable diameter is thinner, the weight is also reduced, which not only makes it more convenient to use, but also reduces the safety hazard caused by excessive weight.

[0056] For some heat-generating components inside the charging pile 110, such as relays, shunts, and poles, it is not very suitable to set flow channels inside them. In some implementation manners, as Figure 5 shown, a heat dissipation cold plate 60 can be connected / covered on one surface of the second heat-generating component 50b where it is not suitable to set a flow channel, and a flow channel for the coolant to pass through is provided in the heat dissipation cold plate 60. Although not shown in the figure, the flow channel of the heat dissipation cold plate 60 is in series communication with the flow channel 51 of the first heat-generating component 50a.

[0057] Figure 6 A schematic diagram of the internal flow channel 61 of the heat dissipation cold plate 60. As Figure 6 shown, the heat dissipation cold plate 60 is provided with a first port 62 and a second port 64. Both ends of the flow channel 61 of the heat dissipation cold plate 60 are respectively communicated with the first port 62 and the second port 64, and the flow channel 61 extends from the first port 62 towards the second port 64. The coolant flows into the flow channel from the first port 62 and flows out of the flow channel 61 to the second port 64. In order to increase the length and occupied area of the flow channel 61, the flow channel 61 can be set to Figure 6 the shape of a meandering extension as shown.

[0058] For the case where a heat dissipation cold plate 60 is further provided inside the charging pile 110, the flow channel 51 of the first heating device 50a, the flow channel 61 of the heat dissipation cold plate 60 and the liquid cooling channel 11 of the liquid cooling charging gun 10 are connected in series, and the output port 114 of the liquid cooling channel 11 of the liquid cooling charging gun 10 is connected to the liquid return port 320 of the coolant distribution unit 30. That is, the coolant output by the coolant distribution unit 30 finally enters the liquid cooling channel 11 of the liquid cooling charging gun 10 and returns to the coolant distribution unit 30 from the liquid cooling channel 11.

[0059] In this way, the coolant distribution unit 30 not only provides coolant to the liquid cooling channel 11 of the liquid cooling charging gun 10, but also provides coolant to the flow channel 51 of the first heating device 50a and the flow channel 61 of the heat dissipation cold plate 60 at the same time. The application does not limit the order in which the coolant flows through the flow channel 51 of the first heating device 50a and the flow channel 61 of the heat dissipation cold plate 60. It can first enter the flow channel 51 of the first heating device 50a and then enter the flow channel 61 of the heat dissipation cold plate 60, or first enter the flow channel 61 of the heat dissipation cold plate 60 and then enter the flow channel 51 of the first heating device 50a; but the last one to flow through should be the liquid cooling channel 11 of the liquid cooling charging gun 10.

[0060] When the charging terminal 100 is working, compared with the liquid cooling charging gun 10, the heat generated by the first heating device 50a and the second heating device 50b is less. After the coolant passes through the flow channel 51 of the first heating device 50a and the flow channel 61 of the heat dissipation cold plate 60, the temperature rise of the coolant is not large, which will not affect the subsequent cooling effect of the coolant entering the liquid cooling charging gun 10. Therefore, the coolant output by the coolant distribution unit 30 needs to enter the first heating device 50a and the heat dissipation cold plate 60 first, and finally enter the liquid cooling charging gun 10, so as to ensure that the liquid cooling charging gun 10, the first heating device 50a and the second heating device 50b can all be cooled.

[0061] In this way, the coolant at the liquid outlet port 310 of the coolant distribution unit 30 passes through the flow channel 61 of the heat dissipation cold plate 60, takes away the heat of the second heating device 50b connected to the heat dissipation cold plate 60, then enters the flow channel 51 of the first heating device 50a, takes away the heat of the first heating device 50a, and finally accesses the liquid cooling channel 11, takes away the heat of the liquid cooling charging gun 10, and finally enters the coolant distribution unit 30 through the liquid return port 320. The coolant distribution unit 30 cools down and cools the recycled coolant and then outputs it.

[0062] Alternatively, the coolant from the liquid outlet port 310 of the coolant distribution unit 30 flows through the flow channel 51 of the first heating device 50a, taking away the heat of the first heating device 50a, and then enters the flow channel 61 of the heat dissipation cold plate 60, taking away the heat of the heat dissipation cold plate 60 and the second heating device 50b connected thereto. Finally, it is connected to the liquid cooling channel 11 to take away the heat of the liquid cooling charging gun 10, and then enters the coolant distribution unit 30 through the liquid return port 320. The coolant distribution unit 30 cools down the recycled coolant and then outputs it.

[0063] In some implementation manners, the inner diameter of the flow channel 61 of the heat dissipation cold plate 60 is larger than the inner diameter of the liquid cooling channel 11 of the liquid cooling charging gun 10. With such a setting, it can be ensured that the overall flow resistance of the liquid channels inside the charging terminal 100 slightly increases or does not increase, ensuring that sufficient coolant can flow into the liquid cooling charging gun 10. In this case, the coolant distribution unit 30 can adopt a conventional coolant distribution unit built in the charging pile, and there is no need to replace it with a higher - configuration coolant distribution unit at all.

[0064] In some implementation manners, at least two heat dissipation cold plates 60 can be provided in the charging terminal 100. The flow channels 61 of the at least two heat dissipation cold plates 60 are in series connection with the flow channels 51 of at least one first heating device 50a. There is no requirement for the sequence of connection between the flow channels 61 of the heat dissipation cold plates 60 and the flow channels 51 of the first heating device 50a, as long as it is ensured that the coolant finally enters the liquid cooling channel 11 and returns to the coolant distribution unit 30 from the liquid cooling channel 11.

[0065] In some implementation manners, a shared heat dissipation cold plate 60 can be covered / connected on at least two second heating devices 50b. That is, one heat dissipation cold plate 60 covers / connects at least two second heating devices 50b, thereby performing liquid cooling on the at least two second heating devices 50b. In this way, the number of heat dissipation cold plates 60 used can be reduced.

[0066] In the embodiment of the present application, as Figure 5 shown, the second heating device 50b is provided with screw holes, and correspondingly, the heat dissipation cold plate 60 is also provided with screw holes. By screwing into the screw holes of the heat dissipation cold plate 60 and the second heating device 50b, the heat dissipation cold plate 60 is fixed on the first heating device 50a. The screw holes of the heat dissipation cold plate 60 can be provided at the part of the heat dissipation cold plate 60 close to the edge, and the screw holes of the second heating device 50b can also be provided at the part of the second heating device 50b close to the edge. It can be understood that the fixing manner of the heat dissipation cold plate 60 and the second heating device 50b is not limited to the screw - locking manner, and can also be various fixing manners used in the art, such as the fixing manner of bonding with thermal conductive adhesive.

[0067] In some implementations, the heat dissipation cold plate 60 directly contacts and covers the second heat generating device 50b to achieve better reception of heat from the second heat generating device 50b.

[0068] In some implementations, a thermally conductive and electrically insulating material (not shown in the figure) is provided between the second heat generating device 50b and the heat dissipation cold plate 60 to avoid an air gap between the second heat generating device 50b and the heat dissipation cold plate 60, which may affect the heat transfer effect between the heat dissipation cold plate 60 and the second heat generating device 50b. In this way, the heat from the second heat generating device 50b is transferred to the heat dissipation cold plate 60 through the thermally conductive material, and the coolant flows through the flow channel of the heat dissipation cold plate 60, thereby taking away the heat of the second heat generating device 50b.

[0069] As Figure 6 shown, the flow channel 61 meanders and extends in the heat dissipation cold plate 60 from the first port 62 towards the second port 64 to extend the length of the flow channel 61, thereby increasing the contact area between the coolant and the second heat generating device 50b, and further enhancing the liquid cooling heat dissipation effect of the coolant. Generally, within an effective area, the greater the extended length of the flow channel, the better the heat dissipation effect brought by the flow channel.

[0070] As Figure 5 shown, the heat dissipation cold plate 60 includes a main body plate 63 and a flow channel pipe 65 embedded in the main body plate 63, and the flow channel 61 is formed by the flow channel pipe 65. Generally, both the main body plate 63 and the flow channel pipe 65 are made of thermally conductive materials. A groove (not shown in the figure) can be provided on the surface of the main body plate 63 facing the first heat generating device 50a, and the flow channel pipe 65 is arranged in the groove, and the surface of the heat dissipation cold plate 60 provided with the pipe is a flat surface as a whole to better achieve contact connection with the second heat generating device 50b.

[0071] The charging terminal 100 of the present application, through the coolant distribution unit 30 built in the charging pile 110, not only provides coolant for the liquid cooling channel 11 of the liquid cooling charging gun 10, but also can at least provide coolant for the flow channels 51 of other first heat generating devices 50a inside the charging pile 110. In this way, there is no need to set up a fan for air cooling the first heat generating device 50a, which can reduce the cost of the entire charging terminal 100 to a certain extent, and does not increase the power module and does not need to expand the cabinet size of the charging pile 110. In addition, the external output capacity of the charging terminal 100 can also be improved, for example, evolving from the current 600kW to 1000kW and higher.

[0072] It should be noted that the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application; without conflict, the implementation manners of the present application and the features in the implementation manners can be combined with each other. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A charging terminal, characterized in that, Comprising: A charging pile, the charging pile comprising: A first heating device, a flow channel being provided in the first heating device; and A coolant distribution unit, comprising a liquid outlet port and a liquid return port; and A liquid-cooled charging gun, connected to the charging pile, the liquid-cooled charging gun being provided with a liquid-cooled channel, the liquid-cooled channel comprising an input port and an output port; Wherein, the coolant distribution unit is used to supply coolant to the flow channel and the liquid-cooled channel, the flow channel and the liquid-cooled channel are connected in series, the liquid outlet port is communicated with the flow channel to supply coolant to the flow channel, and the liquid return port is communicated with the output port of the liquid-cooled channel to recover coolant.

2. The charging terminal according to claim 1, wherein The inner diameter of the flow channel of the first heating device is larger than the inner diameter of the liquid-cooled channel.

3. The charging terminal according to claim 1 or 2, characterized in that, The first heating device is provided with a first connection end and a second connection end, both ends of the flow channel are respectively communicated with the first connection end and the second connection end, and coolant can flow into the flow channel through the first connection end and flow out of the flow channel through the second connection end; The charging pile comprises at least two of the first heating devices, the flow channels of the at least two first heating devices are connected in series, the first connection end of one of the first heating devices is connected to the liquid outlet port, and the second connection end of another first heating device is connected to the input port of the liquid-cooled channel.

4. The charging terminal according to any one of claims 1 to 3, characterized in that The first heating device is a copper row.

5. The charging terminal according to any one of claims 1 to 4, characterized in that The coolant used by the coolant distribution unit is a non-conductive liquid.

6. The charging terminal according to any one of claims 1 to 5, characterized in that, The first heating device is provided with a first connection end and a second connection end, both ends of the flow channel are respectively communicated with the first connection end and the second connection end, and coolant can flow into the flow channel through the first connection end and flow out of the flow channel through the second connection end; The first connection end and the second connection end are arranged on different sides of the first heating device, the flow channel of the first heating device branches into at least two sub-flow channels at a position close to the first connection end, and the at least two sub-flow channels respectively extend and merge at a position close to the second connection end.

7. The charging terminal according to any one of claims 1 to 6, characterized in that The charging pile further comprises a second heating device, the second heating device is connected with a heat dissipation cold plate, and a flow channel is provided in the heat dissipation cold plate; the flow channel of the heat dissipation cold plate is connected in series with the flow channel of the first heating device.

8. The charging terminal according to claim 7, characterized in that, The inner diameter of the flow channel of the heat dissipation cold plate is larger than the inner diameter of the liquid-cooled channel.

9. The charging terminal according to claim 7, wherein An insulating thermal conductive material is provided between the second heating device and the heat dissipation cold plate.

10. The charging terminal according to claim 7, characterized in that, The charging pile comprises at least two of the second heating devices, and the heat dissipation cold plate is connected to at least two of the second heating devices.

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