Automobile charging pile

Abstract

The utility model relates to an automobile charging pile, which comprises a plurality of AC-DC (alternating current-direct current) modules which are respectively connected with independent direct current buses and can convert mains supply into direct current to be output. The charging distribution module is respectively connected with the direct current buses, the switch component is used for respectively controlling the access of each bus, the charging pile is used for being butted with an automobile charging port so as to obtain charging parameters required by an automobile, the charging parameters are sent to the power management module, and the power management module selects and controls the plurality of AC-DC modules to output proper direct current to the direct current buses. And the charging distribution module is controlled to receive the direct current on the direct-current bus and transmit the direct current to the charging pile in parallel as the charging current of the automobile. According to the scheme, each AC-DC module can be flexibly dispatched to supply power to each charging pile according to the requirements of the automobile, and the equipment utilization rate is improved. An energy storage battery stack and a DC-DC module can be arranged, the battery stack can store electricity in idle time and discharge electricity in busy time, and direct current is transmitted to the charging pile through the DC-DC module to serve as charging current. And the overall charging capability of the charging pile can be enhanced.

Description

Technical Field

[0001] This utility model relates to a car charging stack for charging electric vehicles. Background Technology

[0002] Currently, electric vehicles utilize rechargeable batteries to store energy and use electric motors to power the vehicle. Car charging stations are devices for charging electric vehicles. To achieve fast charging, high-power charging stations, i.e., fast charging, are a development direction suitable for installation in specialized car charging stations.

[0003] Existing fast-charging stations have a charging gun for connecting to the car's charging port and a control circuit for communicating with the car to obtain the required charging voltage and current. Each charging station is equipped with a high-power power supply to convert AC power into DC power suitable for the car. The DC power is then delivered to the car's battery pack via the charging gun to achieve charging.

[0004] With this implementation method, a car charging station needs to purchase multiple sets of fast charging piles, which has a high equipment cost. However, the maximum charging power that each car can support is different. If a car charging slowly occupies a fast charging pile, the charging pile will only perform low-power charging, which is equivalent to reducing the utilization efficiency of the charging equipment and is a waste of resources. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an automobile charging pile that can uniformly schedule and allocate several AC-DC modules to provide charging current to the corresponding charging pile according to the charging power required by the automobile, thereby improving the utilization rate of the equipment.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] The vehicle charging pile includes a charging station, a charging distribution module, a power management module, and at least two AC-DC modules;

[0008] The input terminal of the AC-DC module is used to connect to the AC power supply terminal to obtain mains power. The output terminal of the AC-DC module is connected to a DC bus to convert the mains power into preset DC power and supply it to the DC bus. The output terminal of each AC-DC module is connected to an independent DC bus.

[0009] The charging distribution module includes multiple charging bus terminals, and each charging bus terminal is connected to one of the DC buses.

[0010] The charging distribution module also includes a charging control module and a charging pile terminal. The charging pile terminal is connected to the charging pile and is used to transmit charging current to the charging pile.

[0011] Each of the charging bus terminals is connected to the charging pile terminal, and a switch component is provided on the connection path. The charging control module is connected to each switch component to control the switch component.

[0012] The charging control module is connected to the power management module and is used to obtain the charging command from the power management module and control the connection according to the charging command. The connection path between the N charging bus terminals and the charging pile terminals is also provided.

[0013] The charging pile is used to connect to the charging port of the electric vehicle to obtain the charging parameters required by the electric vehicle and to charge the electric vehicle. The power management module is connected to the charging pile for communication between the power management module and the charging pile to obtain the charging parameters.

[0014] The power management module is also connected to the AC-DC module and is used to control the X AC-DC modules to output DC power with an appropriate voltage according to the charging parameters. The DC bus connected to the output terminals of the X AC-DC modules corresponds to the DC bus connected to the terminals of the N connected charging buses.

[0015] The power module input terminal is used to connect to the AC power supply terminal to obtain mains power. The power module output terminal is connected to the power management module and the charging distribution module respectively, and is used to convert the mains power into DC power to power the power management module and the charging distribution module. The power module output terminal is also connected to the charging pile to provide DC power to the control circuit of the charging pile.

[0016] Furthermore, it also includes a battery stack, an energy distribution module, and at least one DC-DC module;

[0017] The battery stack is used to store electrical energy. The input terminal of the DC-DC module is connected to the battery stack, and the output terminal of the DC-DC module is also connected to the DC bus. The DC-DC module receives the stored power from the battery stack, converts it into preset DC power after DC transformation, and supplies it to the DC bus. The output terminal of each DC-DC module is connected to an independent DC bus.

[0018] The energy storage distribution module includes multiple energy storage bus terminals, and each energy storage bus terminal is connected to a DC bus connected to the AC-DC module to obtain the DC power output by the AC-DC module.

[0019] The energy storage distribution module also includes an energy storage control module and a battery stack terminal. The battery stack terminal is connected to the battery stack and is used to supply charging current to the battery stack.

[0020] Each of the energy storage bus terminals is connected to the battery stack terminal, and a switch component is provided on the connection path. The energy storage control module is connected to each switch component to control the switch component.

[0021] The energy storage control module is connected to the power management module and is used to obtain the energy storage command from the power management module and control the connection according to the energy storage command. The connection path between the L energy storage bus terminals and the battery stack terminals.

[0022] The power management module is connected to the battery stack and is used for communication between the power management module and the battery stack to obtain the battery parameters of the battery stack. According to the battery parameters, the power management module controls L AC-DC modules to output DC power with an appropriate voltage. The DC bus connected to the output terminals of the L AC-DC modules corresponds to the DC bus connected to the terminals of the L connected charging buses.

[0023] The power management module is also connected to the DC-DC module and is used to control the Y DC-DC modules to output DC power with an appropriate voltage according to the charging parameters. The DC bus connected to the output terminals of the Y DC-DC modules and / or the DC bus connected to the output terminals of the X AC-DC modules corresponds to the DC bus connected to the terminals of the N connected charging buses.

[0024] The output terminal of the power module is also connected to the energy storage distribution module, which is used to convert the mains power into DC power to power the energy storage distribution module.

[0025] Furthermore, it includes at least three AC-DC modules, at least two of the charging distribution modules, and each charging distribution module is connected to one of the charging piles.

[0026] Furthermore, the power management module is also equipped with a storage module for recording the cumulative operating time of each AC-DC module.

[0027] The beneficial effects of this utility model are as follows: This car charging pile uses multiple AC-DC modules to convert AC mains power into DC power. A charging pile connects to the car's charging port and acquires the required charging parameters. These parameters are sent to the power management module, which selects and controls several AC-DC modules to output appropriate DC power to the DC bus based on the charging parameters. The power management module also controls the charging distribution module to receive the DC power from the aforementioned DC bus and supply it in parallel to the charging pile as the car's charging current. Each AC-DC module can be flexibly scheduled to supply power to each charging pile according to the car's required charging power, improving equipment utilization. In a preferred embodiment, an energy storage battery stack and a DC-DC module are also included. The battery stack can store electrical energy when idle and release it when busy, supplying it to the charging pile via the DC-DC module as the car's charging current. This enhances the overall charging capacity of the charging pile. Attached Figure Description

[0028] Figure 1 This is a functional module diagram of one embodiment of the vehicle charging pile of this solution;

[0029] Figure 2 This is a schematic diagram of one embodiment of the charging distribution module of the vehicle charging pile in this solution;

[0030] Figure 3 This is a schematic diagram of one embodiment of the energy storage and distribution module of the vehicle charging pile in this solution; Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, which typically include:

[0032] The vehicle charging pile includes a charging station, a charging distribution module, a power management module, and at least two AC-DC modules;

[0033] The input terminal of the AC-DC module is used to connect to the AC power supply terminal to obtain mains power. The output terminal of the AC-DC module is connected to a DC bus to convert the mains power into preset DC power and supply it to the DC bus. The output terminal of each AC-DC module is connected to an independent DC bus.

[0034] The charging distribution module includes multiple charging bus terminals, and each charging bus terminal is connected to one of the DC buses.

[0035] The charging distribution module also includes a charging control module and a charging pile terminal. The charging pile terminal is connected to the charging pile and is used to transmit charging current to the charging pile.

[0036] Each of the charging bus terminals is connected to the charging pile terminal, and a switch component is provided on the connection path. The charging control module is connected to each switch component to control the switch component.

[0037] The charging control module is connected to the power management module and is used to obtain the charging command from the power management module and control the connection according to the charging command. The connection path between the N charging bus terminals and the charging pile terminals is also provided.

[0038] The charging pile is used to connect to the charging port of the electric vehicle to obtain the charging parameters required by the electric vehicle and to charge the electric vehicle. The power management module is connected to the charging pile for communication between the power management module and the charging pile to obtain the charging parameters.

[0039] The power management module is also connected to the AC-DC module and is used to control the X AC-DC modules to output DC power with an appropriate voltage according to the charging parameters. The DC bus connected to the output terminals of the X AC-DC modules corresponds to the DC bus connected to the terminals of the N connected charging buses.

[0040] The power module input terminal is used to connect to the AC power supply terminal to obtain mains power. The power module output terminal is connected to the power management module and the charging distribution module respectively, and is used to convert the mains power into DC power to power the power management module and the charging distribution module. The power module output terminal is also connected to the charging pile to provide DC power to the control circuit of the charging pile.

[0041] The basic principle of this car charging pile solution is that multiple AC-DC modules serve as the power source for all charging piles. The charging piles are used to connect to the car. A power management module selects and controls several AC-DC modules to output DC power to charge the car based on the charging parameters required by each charging pile.

[0042] Specifically, such as Figure 1 As shown, the charging pile in this solution includes at least two AC-DC modules. If the AC power supply is sufficient, the more AC-DC modules there are, the stronger the external charging capability and the more charging piles can be supported. More AC-DC modules also facilitate better coordination and scheduling by the power management module, allowing it to select and allocate charging power to each charging pile.

[0043] The AC-DC module converts AC power to DC power, essentially acting as the power supply for a traditional charging station, providing charging current. Existing AC-DC conversion circuits can be referenced for the AC-DC module design.

[0044] like Figure 1As shown, the input terminal of the AC-DC module is used to connect to the AC power supply terminal to obtain mains power. The output terminal of each AC-DC module is connected to an independent DC bus, which converts the mains power into preset DC power and supplies it to the DC bus. The charging distribution module draws power from multiple DC buses and supplies it in parallel to the charging pile to charge the car.

[0045] like Figure 1 , 2 As shown, the charging distribution module includes multiple charging bus terminals, each of which is connected to a DC bus.

[0046] The charging control module is connected to the power management module and is used to receive charging commands from the power management module. Based on the charging commands, the charging control module controls the connection to the appropriate DC bus.

[0047] like Figure 2 As shown, there are switch components K on the connection path from the charging bus terminal to the charging pile terminal. When the charging control module controls the connection of a certain switch component K, the corresponding DC bus is connected to the charging pile terminal. The DC power output by the AC-DC module corresponding to the DC bus will be supplied to the charging pile as the charging current for the vehicle.

[0048] If the charging control module controls the connection path between N charging bus terminals and the charging pile terminals, then the output power of N AC-DC modules will be transmitted in parallel to the charging pile.

[0049] The switching component K can be a relay, contactor, or other switching component, and the charging control module can be implemented using a microcontroller or other control circuits.

[0050] The power management module is also connected to the AC-DC module to control the AC-DC module to output appropriate DC power.

[0051] Specifically, the charging station has a charging gun for connecting to the charging port of the electric vehicle. The control circuit inside the charging station communicates with the vehicle to obtain the charging parameters required by the electric vehicle. The above can be referenced from the handshake process between the existing charging station and the vehicle during charging.

[0052] The power management module connects to the charging station, specifically to the charging station's control circuitry, to obtain the charging parameters required by the vehicle. Then, the power management module controls the AC-DC module to output appropriate DC power.

[0053] For example, if a car requires a charging current of 750 volts and 200 amps, and assuming that each AC-DC module supports an output current of 750 volts and 50 amps, then the power management module can control the four AC-DC modules numbered 1 to 4 to output a current of 750 volts and 50 amps respectively. These four DC currents are then delivered to the four DC buses numbered 1 to 4 respectively.

[0054] When the power management module is activated, the connection path between the four charging bus terminals (numbered 1-4) and the charging pile terminals is established. This results in four 750V 50A currents being delivered to the charging pile terminals, which are then connected in parallel to form a 750V 200A current, which is then delivered to the charging pile and further supplied to the vehicle to provide 750V 200A charging.

[0055] For example, if a car requires a charging current of 500 volts and 100 amps, the power management module can control two AC-DC modules, each outputting 500 volts and 50 amps of DC power, which can be connected in parallel to provide a charging current of 500 volts and 100 amps. The remaining AC-DC modules are in standby mode and can be allocated to other cars for charging when they connect later.

[0056] The power management module can use a microcontroller or other circuits with control functions. The control technology for the output voltage of the AC-DC module can refer to the control principle of existing switching power supplies.

[0057] The charging pile of this solution can be configured with an appropriate number of AC-DC modules and charging piles according to the user's actual needs. For example, it can include at least 3 AC-DC modules and at least 2 charging distribution modules, with each charging distribution module connected to one of the charging piles.

[0058] The more charging stations there are, the more cars can be charged at the same time, and the more AC-DC modules there are, the more flexibly charging power can be allocated and scheduled.

[0059] like Figure 1 As shown, the power module provides low-voltage DC power to various circuit board controllers. The power module input is connected to the AC power supply to obtain mains power. The power module output is connected to the power management module and the charging distribution module, respectively, converting and outputting low-voltage DC power such as 5V or 12V to power their circuits. It also provides 12V DC power to the switching components of the charging distribution module, such as relays.

[0060] The power module output is also connected to the charging pile, specifically to the charging pile's control circuit, providing DC power to the charging pile's control circuit. The power module can refer to various power circuits in existing technology.

[0061] In this scheme, the more AC-DC modules a charging pile has, the more flexible the allocation and scheduling of the AC-DC modules will be. However, the total output power of the entire charging pile is limited by the power supply capacity of the AC power supply end.

[0062] More preferably, a battery stack for energy storage can be configured in the charging pile, allowing the battery stack to store electrical energy during idle periods and release the electrical energy of the battery stack to charge the vehicle during peak charging periods, which can temporarily increase the total output capacity of the charging pile.

[0063] For example, it may also include a battery stack, an energy distribution module, and at least one DC-DC module;

[0064] The battery stack is used to store electrical energy. The input terminal of the DC-DC module is connected to the battery stack, and the output terminal of the DC-DC module is also connected to the DC bus. The DC-DC module receives the stored power from the battery stack, converts it into preset DC power after DC transformation, and supplies it to the DC bus. The output terminal of each DC-DC module is connected to an independent DC bus.

[0065] The energy storage distribution module includes multiple energy storage bus terminals, and each energy storage bus terminal is connected to a DC bus connected to the AC-DC module to obtain the DC power output by the AC-DC module.

[0066] The energy storage distribution module also includes an energy storage control module and a battery stack terminal. The battery stack terminal is connected to the battery stack and is used to supply charging current to the battery stack.

[0067] Each of the energy storage bus terminals is connected to the battery stack terminal, and a switch component is provided on the connection path. The energy storage control module is connected to each switch component to control the switch component.

[0068] The energy storage control module is connected to the power management module and is used to obtain the energy storage command from the power management module and control the connection according to the energy storage command. The connection path between the L energy storage bus terminals and the battery stack terminals.

[0069] The power management module is connected to the battery stack and is used for communication between the power management module and the battery stack to obtain the battery parameters of the battery stack. According to the battery parameters, the power management module controls L AC-DC modules to output DC power with an appropriate voltage. The DC bus connected to the output terminals of the L AC-DC modules corresponds to the DC bus connected to the terminals of the L connected charging buses.

[0070] The power management module is also connected to the DC-DC module and is used to control the Y DC-DC modules to output DC power with an appropriate voltage according to the charging parameters. The DC bus connected to the output terminals of the Y DC-DC modules and / or the DC bus connected to the output terminals of the X AC-DC modules corresponds to the DC bus connected to the terminals of the N connected charging buses.

[0071] The output terminal of the power module is also connected to the energy storage distribution module, which is used to convert the mains power into DC power to power the energy storage distribution module.

[0072] This preferred embodiment adds a battery stack, an energy distribution module, and at least one DC-DC module to the original charging stack.

[0073] A battery stack can be formed by connecting multiple rechargeable batteries in series and parallel, allowing for the storage of a large amount of electrical energy, and can also be based on existing commercial energy storage devices. The battery stack is also equipped with a Battery Management System (BMS) to monitor battery parameters and manage the charging and discharging of the battery stack.

[0074] The DC-DC module is used for DC-DC voltage conversion, and existing DC-DC voltage conversion technologies can be referenced. Its input is connected to the battery stack, and its output is also connected to the DC bus. The DC-DC module converts the stored power in the battery stack into preset DC power and supplies it to the DC bus, which is similar to how the AC-DC module supplies power to the DC bus.

[0075] like Figure 1 As shown, this embodiment has 2 DC-DC modules and 4 AC-DC modules. The output of each module is connected to a DC bus, for a total of 6 DC buses. The DC-DC and AC-DC modules can output DC power to their respective DC buses. In this scheme, the charging bus terminals of the charging distribution module are also connected to the DC buses connected to the DC-DC modules, for example... Figure 1 In this embodiment, the charging bus terminals of the charging distribution module are connected to all six DC buses, so that the DC power output from the DC-DC module and the AC-DC module can be delivered to the charging pile via the charging distribution module.

[0076] like Figure 3 As shown, the energy storage distribution module and the charging distribution module operate on similar principles. The energy storage bus terminals are connected to the DC bus of the AC-DC module to receive the DC power output from the AC-DC module. The battery stack terminals are connected to the battery stack, thus transmitting the DC power output from the AC-DC module to the battery stack, effectively charging it.

[0077] Similar to the charging distribution module, there is a power storage control module that controls the switching components on the connection path between each power storage bus terminal and the battery stack terminal.

[0078] The energy storage control module is connected to the power management module to obtain energy storage commands from the power management module. The purpose of the energy storage commands is to allow the DC power output from several AC-DC modules to be delivered to the battery stack through the energy storage distribution module, so as to store electrical energy in the battery stack.

[0079] The power management module is also connected to the battery stack to obtain battery parameters, typically by connecting to the battery stack's BMS to obtain battery parameters such as voltage and temperature.

[0080] Based on battery parameters, the power management module controls the AC-DC modules to output an appropriate voltage. For example, if the battery stack voltage is detected to be lower than a preset value, indicating a low-charge state requiring charging, the power management module controls L idle AC-DC modules to output DC power according to the battery stack's charging voltage. This DC power is then delivered to the corresponding DC bus.

[0081] The power management module sends a power storage command to the power storage control module, which turns on the switching components of the corresponding L charging bus terminals. Then, the DC power output by the L AC-DC modules is delivered to the battery stack via the power storage distribution module to charge the battery stack.

[0082] The above describes the charging scenario of the battery stack. When the voltage of the battery stack is higher than the preset value, it indicates that the battery stack has sufficient power, and the battery stack can discharge to provide charging current for the car.

[0083] For example, when the charging pile detects that a car is connected, the charging pile communicates with the car to obtain the required charging parameters, and the power management module communicates with the charging pile to obtain the required charging parameters.

[0084] The power management module selects and controls X idle AC-DC modules to output adapted DC power according to the charging parameters.

[0085] The power management module obtains the battery parameters of the battery stack. If the battery parameters meet the preset values ​​and there are idle DC-DC modules connected to the battery stack, the battery stack meets the discharge conditions. Then, the power management module controls Y idle DC-DC modules to output DC power with the appropriate voltage according to the charging parameters.

[0086] The power management module sends a charging command to the charging distribution module, causing the charging distribution module to connect the connection paths between the N charging bus terminals and the charging pile terminals. The DC bus connected to the output terminals of the Y DC-DC modules and the X AC-DC modules correspond to the DC bus connected to the connected N charging bus terminals.

[0087] by Figure 1 For example, in the implementation example, assuming the power management module obtains the charging parameters required by the car as 750 volts 300 amps, the total power is 225 kilowatts, but the maximum power supported by the AC power supply is 150 kilowatts. At this time, the battery stack and DC-DC module can provide the power that is insufficient at the mains power supply.

[0088] like Figure 1 As shown, two DC-DC modules convert and output 750V 50A DC power respectively, and four AC-DC modules convert and output 750V 50A DC power respectively.

[0089] The power management module controls the charging distribution module, connecting the switching components corresponding to the six charging bus terminals. This allows six 750V 50A DC currents to be supplied in parallel to the charging pile, providing the vehicle with a 750V 300A charging current. At this point, the charging power exceeds the maximum power output of the AC power supply, effectively increasing the total output capacity of the charging pile temporarily with the help of the battery stack and DC-DC module to meet the demands of high-power fast charging.

[0090] In this scheme, the DC bus connected to the output terminals of the Y DC-DC modules and / or the DC bus connected to the output terminals of the X AC-DC modules correspond to the DC bus connected to the terminals of the N connected charging buses.

[0091] This refers to the DC bus connected to the output terminals of Y DC-DC modules, plus the DC bus connected to the output terminals of X AC-DC modules, and the corresponding DC bus connected to the terminals of N charging buses.

[0092] Alternatively, the DC bus connected to the output terminals of Y DC-DC modules belongs to the DC bus connected to the terminals of N charging buses.

[0093] Alternatively, the DC bus connected to the output terminals of X AC-DC modules belongs to the DC bus connected to the terminals of N charging buses.

[0094] This allows the DC power output from the DC-DC module and AC-DC module to be delivered to the required charging station via the charging distribution module.

[0095] In this preferred embodiment, the power module also provides low-voltage DC power to the energy storage distribution module, which is similar to the power supply of the aforementioned charging distribution module.

[0096] Furthermore, the power management module can determine when to charge the battery stack based on tiered electricity pricing periods, and can also determine which AC-DC modules to operate or standby based on other preset conditions, such as selecting AC-DC modules to operate based on their cumulative operating time. Its power management module needs to be equipped with a storage module, such as a memory card, to record the cumulative operating time of each AC-DC module.

[0097] The operation of this charging pile can be as follows:

[0098] The charging pile detects that a car is connected, and the charging pile communicates with the car to obtain the required charging parameters. The power management module also communicates with the charging pile to obtain the required charging parameters.

[0099] The power management module reads the cumulative operating time of each AC-DC module recorded in the storage module, selects and controls X idle AC-DC modules to output adapted DC power according to the charging parameters, and the cumulative operating time of the X AC-DC modules is ranked last among all idle AC-DC modules.

[0100] The power management module obtains the battery parameters of the battery stack. If the battery parameters meet the preset values ​​and there are idle DC-DC modules connected to the battery stack, the battery stack meets the discharge conditions. Then, the power management module controls Y idle DC-DC modules to output DC power with the appropriate voltage according to the charging parameters.

[0101] The power management module sends a charging command to the charging distribution module, causing the charging distribution module to connect the connection paths between the N charging bus terminals and the charging pile terminals. The DC bus connected to the output terminals of the Y DC-DC modules and the X AC-DC modules correspond to the DC bus connected to the connected N charging bus terminals.

[0102] The charging operation principle of the charging pile is basically the same as that described above. When selecting idle AC-DC modules, the cumulative working time of the AC-DC modules will be considered, and the modules with the lowest cumulative working time among the idle AC-DC modules will be selected for operation and output.

[0103] This ensures that the cumulative usage time of all AC-DC modules is roughly the same, preventing some modules from being overused and prematurely damaged.

Claims

1. A car charging stack, characterized in that, Includes charging pile, charging distribution module, power management module, and at least two AC-DC modules; The input terminal of the AC-DC module is used to connect to the AC power supply terminal to obtain mains power. The output terminal of the AC-DC module is connected to a DC bus to convert the mains power into preset DC power and supply it to the DC bus. The output terminal of each AC-DC module is connected to an independent DC bus. The charging distribution module includes multiple charging bus terminals, and each charging bus terminal is connected to one of the DC buses. The charging distribution module also includes a charging control module and a charging pile terminal. The charging pile terminal is connected to the charging pile and is used to transmit charging current to the charging pile. Each of the charging bus terminals is connected to the charging pile terminal, and a switch component is provided on the connection path. The charging control module is connected to each switch component to control the switch component. The charging control module is connected to the power management module and is used to obtain the charging command from the power management module and control the connection according to the charging command. The connection path between the N charging bus terminals and the charging pile terminals is also provided. The charging pile is used to connect to the charging port of the electric vehicle to obtain the charging parameters required by the electric vehicle and to charge the electric vehicle. The power management module is connected to the charging pile for communication between the power management module and the charging pile to obtain the charging parameters. The power management module is also connected to the AC-DC module and is used to control the X AC-DC modules to output DC power with an appropriate voltage according to the charging parameters. The DC bus connected to the output terminals of the X AC-DC modules corresponds to the DC bus connected to the terminals of the N connected charging buses. The power module input terminal is used to connect to the AC power supply terminal to obtain mains power. The power module output terminal is connected to the power management module and the charging distribution module respectively, and is used to convert the mains power into DC power to power the power management module and the charging distribution module. The power module output terminal is also connected to the charging pile to provide DC power to the control circuit of the charging pile.

2. The vehicle charging stack as described in claim 1, characterized in that, It also includes a battery stack, an energy storage distribution module, and at least one DC-DC module; The battery stack is used to store electrical energy. The input terminal of the DC-DC module is connected to the battery stack, and the output terminal of the DC-DC module is also connected to the DC bus. The DC-DC module receives the stored power from the battery stack, converts it into preset DC power after DC transformation, and supplies it to the DC bus. The output terminal of each DC-DC module is connected to an independent DC bus. The energy storage distribution module includes multiple energy storage bus terminals, and each energy storage bus terminal is connected to a DC bus connected to the AC-DC module to obtain the DC power output by the AC-DC module. The energy storage distribution module also includes an energy storage control module and a battery stack terminal. The battery stack terminal is connected to the battery stack and is used to supply charging current to the battery stack. Each of the energy storage bus terminals is connected to the battery stack terminal, and a switch component is provided on the connection path. The energy storage control module is connected to each switch component to control the switch component. The energy storage control module is connected to the power management module and is used to obtain the energy storage command from the power management module and control the connection according to the energy storage command. The connection path between the L energy storage bus terminals and the battery stack terminals. The power management module is connected to the battery stack and is used for communication between the power management module and the battery stack to obtain the battery parameters of the battery stack. According to the battery parameters, the power management module controls L AC-DC modules to output DC power with an appropriate voltage. The DC bus connected to the output terminals of the L AC-DC modules corresponds to the DC bus connected to the terminals of the L connected charging buses. The power management module is also connected to the DC-DC module and is used to control the Y DC-DC modules to output DC power with an appropriate voltage according to the charging parameters. The DC bus connected to the output terminals of the Y DC-DC modules and / or the DC bus connected to the output terminals of the X AC-DC modules corresponds to the DC bus connected to the terminals of the N connected charging buses. The output terminal of the power module is also connected to the energy storage distribution module, which is used to convert the mains power into DC power to power the energy storage distribution module.

3. The vehicle charging stack as described in claim 2, characterized in that, It includes at least three AC-DC modules, at least two charging distribution modules, and each charging distribution module is connected to one of the charging piles.

4. The vehicle charging stack as described in claim 3, characterized in that, The power management module is also equipped with a storage module for recording the cumulative operating time of each AC-DC module.

Images