Charging module and charging post

Abstract

A charging module includes a housing, a rectifier plate, and a DC converter plate. The housing consists of a top and bottom section coupled together. An air inlet and outlet are located on either side of the housing. The rectifier plate is attached to the top of the housing. The DC converter plate is attached to the bottom of the housing. Several power switching transistors are arranged on both the rectifier plate and the DC converter plate. There is a gap between the power switching transistors. The power switching transistors are located at one end of the rectifier plate. The power switching transistors on the DC converter plate are also located at one end of the plate.An air duct is located between the rectifier plate and the DC converter plate. The air duct runs parallel to both plates. The two ends of the air duct are connected to the air inlet and outlet, respectively. The airflow in the air duct follows a straight path. Based on this application, during operation, the air resistance in the charging module's air duct is low, heat dissipation is efficient, the noise level is low, reliability is high, and costs are reduced.

Description

Charging module and charging post Technical field This application relates to the technical field of electric vehicle charging stations and, in particular, to a charging module and a charging station. Background With the development of the electric vehicle charging industry, users are demanding faster charging times. To improve the user experience and meet the need for rapid charging, the power output of charging stations will continue to increase. Consequently, the cost and power density of charging modules are also constantly rising. As power density increases, the noise generated during charging module operation is also expected to decrease. This places greater demands on the design of the charging module layout. Typically, a power switching transistor and a capacitor on the rectification side are placed separately. A power switching transistor and a magnetic device on the conversion side of a DC-DC converter (DC-DC converter) are arranged in series in a straight line within an air duct. The distance between the power switching transistor and the capacitor on a rectifier plate is considerable. The capacitor has a poor absorption effect on the voltage and current spikes generated when the power switching transistor is operating, and consequently, the current or voltage spike in the power conversion circuit is high. A large rate of change of current (di / dt) and a large rate of change of voltage (dv / dt) also occur during the operation of the power switching transistor.All of the factors mentioned above cause problems such as electromagnetic interference (EMI) and, consequently, poor electromagnetic compatibility (EMC), which also reduces the device's reliability. In the air duct, the heatsink for the power switching transistor and the magnetic device of a DC-CC board are connected in series in a straight line. This further increases air resistance and directly affects the actual heat dissipation effect of the power switching transistor's heatsink. The device remains in a high-temperature operating state for extended periods and, consequently, is easily damaged, thus increasing costs. Patent CN 110936841 A discloses a cooling component that has a heat sink with one or more slots and heat dissipation fins forming one or more heat dissipation channels. High-heat-generating components are placed inside these channels and are isolated from low-heat-generating components by separator plates. US patent 2016 / 165716 A1 discloses a power conversion apparatus comprising a cooling body that uses liquid cooling to cool both an AC / DC converter and a DC / DC converter. US patent 2018 / 191183 A1 discloses a battery charging module that defines a straight forced-air cooling flow path from one side of the module housing to the other. Summary The products described in this application include a charging module and a charging post. During charging, current and voltage spikes are minimal, and electromagnetic interference is low. Furthermore, the air resistance of the module's air duct is low, heat dissipation is efficient, noise is low, and reliability is high, thus reducing costs. According to a first aspect, a charging module is provided that includes: a housing, comprising an upper housing and a lower housing fitted together, where an air inlet and an air outlet are arranged respectively on two opposite sides of the housing; a rectifier plate, fixedly arranged in the upper housing, where a first power conversion circuit including a plurality of first power switching transistors is arranged on the rectifier plate, the rectifier plate including a first end portion and a second end portion, and the plurality of first power switching transistors are arranged on the first end portion; and a DC conversion plate, fixedly arranged in the lower housing,Where a second power conversion circuit, comprising a plurality of second power switching transistors, is arranged on the DC conversion plate, and the plurality of second power switching transistors are all arranged at one end of the DC conversion plate and are close to the first power switching transistors. An air duct is arranged between the rectifier plate and the DC conversion plate. The air duct is parallel to the rectifier plate and the DC conversion plate. The two ends of the air duct are connected respectively to the air inlet and outlet. The airflow path in the air duct is a straight line. In this implementation of this application,The power switching transistors, which generate a large amount of heat, are located at one end of the rectifier or DC converter board, aiding in air-cooled heat dissipation. Furthermore, there is spacing between the devices located in the air duct, which also facilitates airflow. No devices that would create significant air resistance are placed in the air duct. The air duct is relatively independent. There are no devices connected in series within the air duct, so air flows smoothly and heat dissipation is effective. In one possible implementation, the first end part is positioned at the air inlet and the second end part is positioned at the air outlet. In this implementation of the application, the first end section, where the plurality of power switching transistors are arranged, is located at the air inlet. The second end section is located at the air outlet. Because the air inlet is on the opposite side from the air outlet, forming a direct ventilation duct, the airflow circulates from the first end section to the second end section. This direct ventilation helps to quickly expel hot air from the housing, thus improving the heat dissipation effect. The first power conversion circuit further includes a plurality of first capacitors and a plurality of first electromagnetic devices. The plurality of first capacitors are arranged between adjacent first power switching transistors. There is a space between each first capacitor and the first power switching transistor. The plurality of first electromagnetic devices are located between the first end portion and the second end portion. There is a space between the plurality of first electromagnetic devices. The multiple capacitors are arranged close to the power switching transistors, helping to absorb the current and voltage spikes generated when the transistors operate. This prevents electromagnetic interference and improves the stability of the power conversion circuit. Space is provided between the multiple electromagnetic devices, which generate a large amount of heat, to facilitate airflow and improve heat dissipation efficiency. In one possible implementation, the second power conversion circuit further includes a plurality of second capacitors and a plurality of second electromagnetic devices. The plurality of second capacitors are arranged between adjacent power switching transistors. There is a space between each second capacitor and the second power switching transistor. The plurality of second electromagnetic devices are located on both sides of the air duct. There is a space between the plurality of second electromagnetic devices. The multiple capacitors are arranged close to the power switching transistors, helping to absorb the current and voltage spikes generated when the transistors operate. This prevents electromagnetic interference and improves the stability of the power conversion circuit. Space is provided between the multiple electromagnetic devices, which generate a large amount of heat, to facilitate airflow and improve heat dissipation efficiency. In one possible implementation, in the housing, there is a space between the devices on the rectifier board and the devices on the DC conversion board. The rectifier plate is attached to the upper housing. The DC converter plate is attached to the lower housing. Once the upper and lower housings are installed, the rectifier plate and DC converter plate components are positioned opposite each other. In this position, a gap exists between the rectifier plate and DC converter plate components, which helps reduce air resistance in the air duct. Furthermore, the rectifier plate components are not in contact with the DC converter plate components, thus minimizing electromagnetic interference. The fact that the components are not in contact with each other also reduces damage from collisions, resulting in cost savings. The load module further includes: a plurality of first heat sinks, permanently attached to the first power switching transistors. Each first heat sink corresponds to at least one first power switching transistor. Each of the first heat sinks includes a plurality of heat dissipation fins arranged in parallel. All heat dissipation fins are arranged in one direction from the air inlet to the air outlet. Multiple heat sinks are used for heat dissipation. The fins of the heat sinks are arranged in the air duct. The fins are oriented in the same direction as the airflow. The space between the fins can be used as part of the air duct. Because the fins are oriented in the same direction as the airflow, when air flows through the space between the fins, the air resistance is lower and the heat dissipation effect is improved. In one possible implementation, the load module further includes: a plurality of second heat sinks, permanently attached to the second power switching transistors. Each second heat sink corresponds to at least one second power switching transistor. Each of the plurality of second heat sinks includes a plurality of heat dissipation fins arranged in parallel. All heat dissipation fins are oriented from the air inlet to the air outlet. Multiple heat sinks are used for heat dissipation. The fins of the heat sinks are arranged in the air duct. The fins are oriented in the same direction as the airflow. The space between the fins can be used as part of the air duct. Because the fins are oriented in the same direction as the airflow, when air flows through the space between the fins, the air resistance is lower and the heat dissipation effect is better. In one possible implementation, the shapes of the plurality of heat sinks are rectangular. The rectifier plate is further provided with: a protective cover, fixed to the second end of the rectifier plate. An electromagnetic compatibility circuit comprising a plurality of magnetic first devices is arranged within the protective cover. The protective cover is used to protect against electromagnetic interference that may be generated by the electromagnetic compatibility circuit, which helps to improve the stability of the power conversion circuit. In one possible implementation, a plurality of ventilation holes are arranged in the protective cover. The protective cover is located at one end of the air duct, near the air outlet. This cover has multiple ventilation holes to reduce air resistance at the outlet. Air flows easily and quickly through the outlet, improving the cooling effect. The mounting heights of the plurality of first heat sinks, the plurality of first electromagnetic devices, and the protective cover are uniform. The fact that the heights of components such as heat sinks and electromagnetic devices are uniformly distributed on the rectifier plate helps optimize space utilization within the enclosure. This allows for the power conversion circuit to be arranged in a small space, thus minimizing the overall footprint. Furthermore, the uniform height of these components on the rectifier plate reduces air resistance and noise during airflow. In one possible implementation, the mounting heights of the plurality of second heat sinks and the plurality of second electromagnetic devices are uniform. The fact that the heights of components such as heat sinks and electromagnetic devices are uniformly distributed on the rectifier board helps optimize space utilization within the enclosure. This allows for the power conversion circuit to be arranged in a small space, thus minimizing the overall footprint. Furthermore, the uniform height of these components on the DC converter board reduces air resistance and noise as airflow passes through. In one possible implementation, the housing further includes: a panel, located at the air inlet and fixedly connected to the upper and lower housings, wherein a plurality of ventilation holes are arranged in the panel; and at least one fan, arranged in the panel, mounted in the housing, and configured to introduce air into the housing. Multiple ventilation holes are arranged in the panel for air intake. The fan located in the panel draws in outside air, which then exits through the air duct at the other end. Air resistance in a straight duct is low, resulting in high heat dissipation efficiency. In another aspect, a charging station is provided, configured to charge a vehicle's power battery and including at least one of the charging modules mentioned above. Rectification and conversion to direct current are performed in an alternating current power supply using the charging module. In this implementation of the application, the rectification and conversion of direct current (DC) into alternating current (AC) is performed using the aforementioned charging module. This converts the external AC into DC that meets the charging requirements of the vehicle's battery. During the charging process, current and voltage spikes are small, electromagnetic interference is minimal, air resistance in the air duct is low, heat dissipation in the module is effective, noise is low, and reliability is high. Furthermore, the charging module has a small volume, allowing for a proportional reduction in the size of the charging station and lower manufacturing costs. According to another aspect, a charging station is provided, configured to charge a vehicle's power battery, and includes a charging station housing, a main control board, and at least one charging module. The main control board and the charging module are located within the charging station housing. The main control board is connected to the charging module and is configured to control its operation. The charging module includes a rectifier board and a DC-DC converter board. The rectifier board and the DC-DC converter board are fitted together. The rectifier board and the DC-DC converter board share a single air duct for heat dissipation.At the ends of the rectifier plate and the DC conversion plate are arranged, respectively, an air inlet and an air outlet of the air duct. The direct-ventilated charging module is used to charge the vehicle's power battery. During the charging process, current and voltage spikes are small, electromagnetic interference is minimal, air resistance in the air duct is low, heat dissipation in the module is effective, noise is low, and reliability is high. In one possible implementation, the charging module further includes a housing. The housing comprises an upper and a lower compartment. The rectifier plate is fixedly arranged in the upper compartment. A first power conversion circuit, comprising a plurality of power switching transistors, is arranged on the rectifier plate and configured to convert an external input alternating current into direct current. The DC conversion plate is fixedly arranged in the lower compartment. A second power conversion circuit, comprising a plurality of second power switching transistors, is arranged on the DC conversion plate and configured to convert a voltage from the DC current. The first power conversion circuit includes a plurality of first power switching transistors, a plurality of first capacitors, a plurality of first electromagnetic devices, and a plurality of first heat sinks. The plurality of first capacitors are arranged between adjacent first power switching transistors. There is a space between each first capacitor and the first power switching transistor. The plurality of first electromagnetic devices are located in the center of the rectifier plate. There is a space between the plurality of first electromagnetic devices. The plurality of first heat sinks are permanently attached to the first power switching transistors. Each first heat sink corresponds to at least one first power switching transistor.Any of the first heat sinks includes a plurality of heat dissipation fins that are arranged in parallel. All the heat dissipation fins are arranged in one direction from the air inlet to the air outlet. In one possible implementation, the second power conversion circuit includes a plurality of second power switching transistors, a plurality of second capacitors, a plurality of second electromagnetic devices, and a plurality of second heat sinks. The plurality of second capacitors are arranged between adjacent power switching transistors. There is a gap between each second capacitor and the second power switching transistor. The plurality of second electromagnetic devices are located on either side of the air duct. There is a gap between the plurality of second electromagnetic devices. The plurality of second heat sinks are permanently attached to the second power switching transistors. Each second heat sink corresponds to at least one second power switching transistor.Each of the plurality of second heat sinks includes a plurality of heat dissipation fins that are arranged in parallel. All the heat dissipation fins are arranged in the direction from the air inlet to the air outlet. In one possible implementation, the charging module also includes at least one fan, arranged at the air inlet and configured to introduce air into the housing. Brief description of the drawings FIG.1 is a schematic diagram of a structure of a load-bearing post system; FIG.2 is an ordered exploded view diagram of a load module structure; FIG. 3 is a schematic diagram of a module arrangement structure of a rectifier plate; and FIG.4 is a schematic diagram of a module arrangement structure of a DC converter board. Description of the achievements New energy vehicle charging stations typically convert alternating current (AC) to direct current (DC) that meets the requirements for DC rectification and conversion, and then charge the vehicle's battery. This conversion process is usually implemented using a charging module. When the charging module is operating, heat dissipation is necessary. Heat dissipation through air cooling is a common technical method used today. With the development of fast-charging technologies, the power output of charging stations is constantly increasing. The current and voltage of a power circuit fluctuate considerably. Current and voltage spikes frequently occur, often resulting in electromagnetic interference. This leads to an unstable power conversion circuit.Furthermore, the amount of heat generated by a power conversion module is constantly increasing. A conventional design solution for the load module cannot meet the stable operation and heat dissipation requirements of a high-power module. This creates a technical bottleneck. Charging stations function similarly to fuel pumps at gas stations. They can be fixed to the ground or walls, installed in commercial buildings (e.g., retail stores, shopping malls, and public parking garages) and in underground parking garages, and can charge batteries of various types of electric vehicles according to their different voltage ratings. The input ends of the charging stations connect directly to the AC power grid, and the output ends are equipped with a plug for charging the electric vehicle batteries. These charging stations offer users the option of basic or fast charging. They are equipped with a display that can show relevant information such as the amount of charge, costs, and battery charging time. Figure 1 is a schematic diagram of a charging station system. As shown in Figure 1, this application provides a charging station. The charging station is configured to charge a vehicle battery and includes a charging station housing, a main control board 101, and a charging module 102. The main control board 101 and the charging module 102 are arranged in the charging station housing. The main control board 101 is connected to the charging module 102 and is configured to control the operation of the charging module 102. The charging module 102 includes a rectifier and a DC converter. The rectifier and the DC converter are arranged in a snap-fit ​​configuration. The rectifier and the DC converter share a single air duct for heat dissipation.An air inlet and an air outlet are located at the two ends of the rectifier and the DC converter, respectively. The load post also includes an input power distribution end 103 and an output power distribution end 104. Both the input power distribution end 103 and the output power distribution end 104 include switches, such as a contactor and a circuit breaker, and serve as input and output ports for the load post. The main control board 101 and the load module 102 are located between the input power distribution end 103 and the output power distribution end 104.The main control board 101 controls the alternating current from the input power distribution end 103, converts it through the charging module 102, and finally outputs it from the output power distribution end 104 to charge the battery of an electric vehicle. The input power distribution end 103 can be understood to be connected to an external AC power supply. A charging module housing 102 includes an upper housing and a lower housing. A rectifier is fixedly arranged in the upper housing. A first power conversion circuit, including a plurality of first power switching transistors, is arranged in the rectifier and is configured to convert an externally input alternating current into a direct current. The direct current converter is fixedly arranged in the lower housing. A second power conversion circuit, including a plurality of second power switching transistors, is arranged on a direct current converter plate and is configured to convert a voltage from the direct current. The first power conversion circuit includes a plurality of first power switching transistors, a plurality of first capacitors, a plurality of first electromagnetic devices, and a plurality of first heat sinks. The plurality of first capacitors are arranged between adjacent first power switching transistors. There is a space between each first capacitor and the first power switching transistor. The plurality of first electromagnetic devices are located in the center of the rectifier. There is a space between the plurality of first electromagnetic devices. The plurality of first heat sinks are permanently attached to the first power switching transistors. Each first heat sink corresponds to at least one first power switching transistor.Any of the first heat sinks includes a plurality of heat dissipation fins that are arranged in parallel. All the heat dissipation fins are arranged in one direction from the air inlet to the air outlet. The second power conversion circuit also includes a plurality of second power switching transistors, a plurality of second capacitors, a plurality of second electromagnetic devices, and a plurality of second heat sinks. The plurality of second capacitors are arranged between adjacent power switching transistors. There is a gap between each second capacitor and the second power switching transistor. The plurality of second electromagnetic devices are located on either side of the air duct. There is a gap between the plurality of second electromagnetic devices. The plurality of second heat sinks are permanently attached to the second power switching transistors. Each second heat sink corresponds to at least one second power switching transistor.Each of the plurality of second heat sinks includes a plurality of heat dissipation fins that are arranged in parallel. All the heat dissipation fins are arranged in the direction from the air inlet to the air outlet. In one possible implementation, the 102 charging module also includes at least one fan, arranged at the air inlet and configured to introduce air into the housing. In the load module used in this implementation of this application, the rectifier and DC converter are mounted in a snap-fit ​​configuration. They share an air duct for heat dissipation. A fan is positioned at the air inlet of the air duct to control airflow from the inlet to the outlet and vice versa. A specific gap is provided between the rectifier and DC converter to ensure proper airflow. Furthermore, no devices that would create excessively high air resistance are located in the air duct, thus minimizing air resistance in the direct ventilation duct. This aids in heat dissipation.When airflow passes through the air duct, excessive noise is not generated, due to the low air resistance. This application also provides a design solution for a load module. Figure 2 is an exploded view diagram of a load module structure. As shown in Figure 2, the load module includes a housing 200, a panel 210, a fan 211, a rectifier, and a DC converter. The housing 200 includes an upper housing 201 and a lower housing 202 that are coupled together. In addition, an air inlet 203 and an air outlet 204 can be arranged on either side of the housing for ventilation, in order to implement heat dissipation by air cooling. Housing 200 may further include: a panel 210, wherein the panel 210 is located at the air inlet 203 and is fixedly connected to the upper housing 201 and the lower housing 202, and a plurality of ventilation holes are arranged in the panel 210; and at least one fan 211, arranged in the panel 210, mounted in the housing 200 and configured to draw air into the housing 200. The plurality of ventilation holes are arranged in the panel 210 for air intake. External air can be drawn into the housing 200 by means of the fan 211 arranged in the panel 210, and then exhausted from the other end of the housing 200 through an air duct. The air resistance in a straight-lined air duct is small, and the heat dissipation efficiency is high. A rectifier plate 205 and a DC converter plate 208 are arranged in housing 200 for AC-to-DC and DC-to-DC conversion. Each rectifier plate 205 and DC converter plate 208 is equipped with a power conversion circuit and incorporates a plurality of power switching transistors 13, capacitors, and a plurality of magnetic elements (such as a transformer and an inductor). The capacitors are configured to filter a current or voltage spike generated when the power conversion circuit operates, thereby reducing electromagnetic interference in the circuit. The power conversion circuit of the rectifier plate 205 is configured to convert AC to DC.The power conversion circuit of the DC converter board 208 is configured to change the DC voltage to meet an output voltage requirement. It should be understood that the load module first converts an input AC current to DC current using the rectifier board 205, and then converts the DC voltage using the DC converter board 208. The air duct is located between the rectifier plate 205 and the DC converter plate 208, and serves as a channel for heat dissipation via air cooling. The air duct is positioned in a straight line with the air inlet 203 and the air outlet 204, enabling direct ventilation and providing effective heat dissipation. Additionally, the housing may be equipped with an LED display 212 or a control button to display information such as temperature, current, and voltage. The control button may control the fan 211's power on / off function, input user instructions, and similar functions. Figure 3 is a schematic diagram of a rectifier plate module arrangement. With reference to Figures 2 and 3, a rectifier includes a rectifier plate 205, a plurality of power switching transistors 213, a plurality of capacitors 214, and magnetic devices. The power conversion circuit, which includes a plurality of power switching transistors 213, a plurality of capacitors 214, and a plurality of electromagnetic devices 215, is configured to convert an external alternating current (AC) to direct current (DC). The rectifier plate 205 is fixedly arranged in the upper housing 201 and includes a first end portion 206 and a second end portion 207. The first end portion 206 is located at an air inlet 203. The second end portion 207 is located at an air outlet 204.The plurality of power switching transistors 213 and the plurality of capacitors 214 are arranged on the first end portion 206 of the rectifier plate 205 and are close to the air inlet 203. The plurality of capacitors 214 are arranged between adjacent power switching transistors 213. There is a gap between the capacitors 214 and the power switching transistors 213, so that air resistance can be reduced, airflow facilitated, and heat dissipation efficiency improved. The plurality of electromagnetic devices 215 are arranged in the center of the rectifier plate 205, and can be positioned between the first end portion 206 and the second end portion 207. There is also a gap between the plurality of electromagnetic devices 215, in order to reduce air resistance and improve heat dissipation efficiency.Magnetic devices include, but are not limited to, an inductor, a transformer, and the like. Figure 4 is a schematic diagram of a module arrangement for a DC converter board. With reference to Figures 2 and 4, the DC converter board 208 is fixedly mounted in a lower housing 202. A power conversion circuit, comprising a plurality of power switching transistors 213, a plurality of capacitors 214, and a plurality of magnetic devices, is included in the DC converter board 208 and is configured to convert a rectified DC voltage so that the output load voltage meets the load voltage of a vehicle battery. The plurality of power switching transistors 213 are centrally arranged at one end of the DC converter board 208 and are positioned in an air inlet 203.The plurality of capacitors 214 are also arranged near the power switching transistors 213 and are configured to absorb the current and voltage spikes generated by the power conversion circuit, thereby reducing voltage fluctuations and improving the stability of the power conversion circuit. Furthermore, the plurality of magnetic devices may be arranged along the edges of two sides of an air duct. A space exists between the plurality of electromagnetic devices 215. Air can circulate through this space, reducing air resistance and improving heat dissipation efficiency. In some embodiments, in the air duct, in particular, a path from the air inlet 203 to an air outlet 204 is a path through which primarily an airflow passes. No device that offers significant air resistance is arranged in the path, nor is any device, such as a horizontal plate, that obstructs the direction of the airflow. This can significantly reduce the airflow resistance in the air duct, so that the airflow after heat exchange can exit quickly through the air outlet 204, and the heat is rapidly discharged from the housing 202, thus significantly improving the heat dissipation efficiency. In this implementation of the application, the multiple capacitors 214 are arranged near the power switching transistors 213. This helps absorb current and voltage spikes generated when the power switching transistors 213 operate, reducing voltage fluctuations and thus preventing electromagnetic interference problems and improving the stability of the power conversion circuit. Furthermore, the power switching transistors 213, which generate a significant amount of heat, are located at the air inlet 203. A gap exists between the devices in the air duct, facilitating airflow. No devices that would create high air resistance are placed in the air duct. The air duct is relatively independent.There are no devices connected in series in the air duct, so the air resistance is small and the heat dissipation effect is good. In another possible embodiment, the plurality of power switching transistors 213 and the plurality of capacitors 214 arranged on the rectifier plate 205 in the previous embodiment may be further arranged in a second end portion 207, i.e., a location near the air outlet. The plurality of power switching transistors 213 and the plurality of magnetic devices arranged on the DC converter plate 208 in the previous embodiment are arranged at the other end of the DC converter plate, i.e., a location near the air outlet. A space is provided between the devices. The devices are arranged sequentially in the air duct. No device that generates high air resistance is provided. The air duct is relatively independent. No devices are connected in series.Implementing this application can also reduce air resistance and improve heat dissipation efficiency. In the housing, the rectifier board 205 is secured in the upper housing 201, and the DC converter board 208 is secured in the lower housing 202. The components on the rectifier board 205 are close to the components on the DC converter board 208. However, there is a gap between them. This gap helps reduce air resistance in the air duct, facilitates airflow, and improves heat dissipation. Furthermore, the components on the rectifier board 205 and the components on the DC converter board 208 are not in contact with each other, thus preventing electromagnetic interference.The fact that the devices are not in contact with each other also reduces damage caused by mutual collisions between devices, thus saving costs. Furthermore, a plurality of heat sinks 216 can be arranged on a plurality of power switching transistors 213. The heat sinks 216 are permanently attached to the power switching transistors 213 by means of silicone grease, ceramic substrates, or screws. Each heat sink 216 corresponds to at least one power switching transistor 213 and is used for heat dissipation of at least one power switching transistor 213. Any of the plurality of heat sinks 216 includes a plurality of heat dissipation fins arranged in parallel. All the heat dissipation fins are arranged in one direction from the air inlet 203 to the air outlet 204. In this embodiment of the application, the plurality of heat sinks 216 are used for heat dissipation. The fins of the heat sinks 216 are arranged in the air duct.The fins of the 216 heat sinks are oriented in the same direction as the airflow. The space between the fins of the 216 heat sinks can be used as part of the air duct. Because the fins of the 216 heat sinks are oriented in the same direction as the airflow, when air flows through the space between the fins, the air resistance is lower and the heat dissipation effect is better. In one possible embodiment, the shapes of the plurality of heat sinks 216 can be rectangular. The use of regularly shaped rectangular heat sinks 216 simplifies the design of the rectifier board 205 and the DC converter board 208, makes the most of the board space, and improves the board's power density. A protective cover 209 is arranged on the rectifier plate 205 and is configured to shield a portion of an electromagnetic wave. The protective cover 209 is attached to the second end portion 207 of the rectifier plate 205. An electromagnetic compatibility circuit comprising a plurality of magnetic devices may be arranged on the protective cover 209. Furthermore, a plurality of ventilation holes may be arranged in the protective cover 209 to allow airflow. Because the protective cover 209 is arranged on the second end portion 207 of the rectifier plate 205, it is close to the air outlet 204. To reduce air resistance in the air duct, additional ventilation holes may be provided in the protective cover 209.In one example, multiple ventilation holes are arranged on all the side plates of the protective cover 209, allowing airflow from the air duct to easily exit through the air outlet 204, thus improving the air cooling effect. Furthermore, the protective cover 209 is used to shield against electromagnetic interference that may be generated by the electromagnetic compatibility circuit, thereby helping to improve the stability of the power conversion circuit. The mounting heights of the multiple heat sinks 216, the multiple electromagnetic devices 215, and the protective cover 209, which are arranged on the rectifier plate 205, are uniform. The mounting heights of the heat sinks 216 and the electromagnetic devices 215 arranged on the DC converter plate 208 are also uniform. The fact that the heights of the devices, such as the heat sinks 216 and the electromagnetic devices 215, on the rectifier plate 205 and the DC converter plate 208 are uniform helps optimize space utilization within the housing and allows for the power conversion circuits to be arranged in a small space, thus minimizing the overall footprint.Furthermore, the uniformly high devices on the rectifier plate 205 can reduce air resistance and noise when airflow passes through them. For the sake of distinction, the power switching transistors 213 arranged on the rectifier plate 205 can be referred to as first power switching transistors. The power switching transistors 213 arranged on the DC converter plate 208 can be referred to as second power switching transistors. The capacitors 214 arranged on the rectifier plate 205 can be referred to as first capacitors. The capacitors 214 arranged on the DC converter plate 208 can be referred to as second capacitors. The electromagnetic devices 215 arranged on the rectifier plate 205 can be referred to as first magnetic devices.The electromagnetic devices 215 arranged on the DC converter board 208 may be referred to as second magnetic devices. The heat sinks 216 arranged on the rectifier board 205 may be referred to as first heat sinks. The heat sinks 216 arranged on the DC converter board 208 may be referred to as second heat sinks. An implementation of this application further provides a charging station that includes at least one of the aforementioned charging modules and is configured to charge a vehicle's power battery. The charging station rectifies and converts an alternating current (AC) power supply to direct current (DC) using the charging module and then converts the AC power supply back into DC that meets the vehicle's battery requirements for charging. During charging, the charging station experiences small current and voltage peaks, minimal electromagnetic interference, good heat dissipation in the module, low noise, and high reliability.Thanks to the miniaturization of the volume of the loading module, the volume of the loading post can be reduced proportionally, which allows for a decrease in the surface area occupied by said tank and, in turn, a further reduction in manufacturing costs. The scope of protection of this application shall be subject to the scope of protection of the claims.

Claims

1. A charging module, comprising: a housing (200), comprising an upper housing (201) and a lower housing (202) fitted together, wherein an air inlet (203) and an air outlet (204) are arranged respectively on two opposite sides of the housing (200); a rectifier plate (205), fixedly arranged in the upper housing (201), in which a first power conversion circuit comprising a plurality of first power switching transistors (213) is arranged in the rectifier plate (205), the rectifier plate (205) comprising a first end part (206) and a second end part (207), and the plurality of first power switching transistors (213) are arranged in the first end part (206);the first power conversion circuit further comprises a plurality of first capacitors (214) and a plurality of first electromagnetic devices (215), wherein the plurality of first capacitors (214) are arranged between adjacent power switching transistors (213), and there is a space between each first capacitor and the power switching transistor (213); and the plurality of first electromagnetic devices (215) are located between the first end part and the second end part, and there is a space between the plurality of first electromagnetic devices (215);the first power conversion circuit further comprises a plurality of first heat sinks (216), fixedly attached to the first power switching transistors (213), wherein each first heat sink (216) corresponds to at least one first power switching transistor (213), and any one of the first heat sinks (216) comprises a plurality of heat dissipation fins arranged in parallel, and all the heat dissipation fins are arranged in one direction from the air inlet (203) to the air outlet (204); wherein the rectifier plate (205) is further provided with: a protective cover (209), attached to the second end portion of the rectifier plate (205), and an electromagnetic compatibility circuit comprising a plurality of first magnetic devices is arranged in the protective cover;wherein the mounting heights of the plurality of first heat sinks (216), the plurality of first electromagnetic devices (215) and the protective cover (209) are uniform; a DC conversion plate (208), fixedly arranged in the lower housing (202), wherein a second power conversion circuit comprising a plurality of second power switching transistors (213) arranged on the DC conversion plate (208) is arranged, and the plurality of second power switching transistors (213) are all arranged at one end of the DC conversion plate (208) and are close to the first power switching transistors (213);and an air duct is arranged between the rectifier plate (205) and the DC conversion plate (208), the air duct being parallel to the rectifier plate and the DC conversion plate (208), the two ends of the air duct being connected respectively to the air inlet (203) and the air outlet (204).

2. The charging module according to claim 1, wherein the first end portion (206) is arranged at the air inlet (203) and the second end portion (207) is arranged at the air outlet (204).

3. The charging module according to claim 1, wherein the second power conversion circuit further comprises a plurality of second capacitors (214) and a plurality of second electromagnetic devices (215);The plurality of second capacitors (214) are arranged between adjacent power switching transistors (213), and there is a space between each second capacitor (214) and the second power switching transistor (213);and the plurality of second electromagnetic devices (215) are located on both sides of the air duct, and there is a space between the plurality of second electromagnetic devices (215).

4. The charging module, according to any one of claims 1 to 3, wherein in the housing (200) there is a space between the rectifier plate (205) and the DC conversion plate (208).

5. The charging module, according to any one of claims 1 to 4, further comprising: a plurality of second heat sinks (216), fixedly attached to the second power switching transistors (213), wherein each second heat sink (216) corresponds to at least one second power switching transistor (213);and any one of the plurality of second heat sinks (216) comprises a plurality of heat dissipation fins arranged in parallel, and all the heat dissipation fins are arranged in one direction from the air inlet (203) to the air outlet (204).

6. The charging module, according to any one of claims 1 to 5, wherein the housing (200) further comprises: a panel (210), located at the air inlet (203) and fixedly connected to the upper housing (201) and the lower housing (202), wherein a plurality of ventilation holes are arranged in the panel (210);and at least one fan (211), is disposed on the panel (210), mounted in the housing (200) and configured to introduce air into the housing (200).

7. A charging post, configured to charge a vehicle power battery, comprising a charging post housing, a main control board (101) and at least one charging module (102), according to any one of the preceding claims, wherein the main control board (101) and the charging module (102) are disposed in the charging post housing (200).

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