Charging method and charging station of high-power charging system based on electric vehicle

Abstract

The invention discloses a charging method and a charging station for a high-power charging system based on an electric vehicle, and the charging station comprises a first charging module which is disposed at a ground end and is used for carrying out the filtering, rectification and protection of an inputted AC power supply, and converting the AC power supply into a stable DC power supply; the second charging module is connected to the vehicle-mounted end of the first charging module and used for receiving the direct-current power source converted by the first charging module and adjusting the voltage and the current so as to adapt to different charging powers; the battery pack is connected to the second charging module; the charging control unit is arranged among the battery pack, the first charging module and the second charging module, acquires charging information and then performs adaptive charging; after the input current and voltage are rectified and adjusted, the battery pack is charged. According to the invention, close cooperation of the charging module and intelligent management of the charging control unit are realized. Accurate rectification adjustment can be carried out on input current and voltage, and high-power charging requirements of different battery packs are met.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery chargers, and in particular to a charging method and a charging station based on a high-power charging system of an electric vehicle. Background Art

[0002] Globally, the rapid development of the electric vehicle industry is profoundly driving changes in the field of industrial vehicles. In order to meet this trend, charger technology is also rapidly advancing and has become an important support for the popularization of electric vehicles. Depending on the installation location, chargers are mainly divided into two types: on-board and off-board. Their core function is to convert the input AC power into DC power, thereby charging the battery pack of the electric vehicle.

[0003] However, with the continuous advancement of battery technology, battery capacity is increasing, which poses a higher challenge to chargers. Under the premise of keeping the charging time unchanged, the charging current needs to be increased to meet the charging needs of larger capacity batteries. This change makes the design of chargers more complex, and the requirements for both hardware and software have increased.

[0004] In addition, the increase in charging current also brings another problem: the wiring harness connecting the charger and the vehicle needs to be thickened to withstand the larger current. This not only increases the inconvenience of use, such as the wiring harness is heavier and more difficult to carry and store, but also significantly increases the overall cost of the charging system. Another noteworthy issue is that the voltage platform currently used by industrial vehicles is lower than 200V, which is incompatible with the national standard charging pile voltage platform. This limits the ability of industrial vehicles to utilize the existing charging pile infrastructure and cannot fully enjoy the convenience and economy of the charging infrastructure.

[0005] The shortcomings of the existing technology: the increasing complexity of the charger design. As the charging current increases, the design difficulty and cost of the charger increase; the inconvenience and cost increase caused by the thickening of the wiring harness. The thickening of the wiring harness not only increases the difficulty of use, but also significantly increases the overall cost of the system; the voltage platform incompatibility problem. The voltage platform mismatch between industrial vehicles and national standard charging piles limits the utilization rate and economic benefits of the charging infrastructure. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art. To achieve the above purpose, a charging method and a charging station based on a high-power charging system for electric vehicles are used to solve the problems raised in the above background technology.

[0007] A charging method based on a high-power charging system for an electric vehicle, the system comprising:

[0008] The first charging module disposed at the ground end is responsible for filtering, rectifying and protecting the input AC power supply and converting it into a stable DC power supply;

[0009] A second charging module connected to the vehicle-mounted end of the first charging module is used to receive the DC power converted by the first charging module and adjust the voltage and current to adapt to different charging powers;

[0010] a battery pack connected to the second charging module; and

[0011] A charging control unit disposed between the battery pack and the first charging module and the second charging module for collecting charging information and then adapting charging;

[0012] The first charging module cooperates with the second charging module to rectify and adjust the input current and voltage, and then charges the battery pack;

[0013] The charging method steps of the charging system are as follows:

[0014] Step S1, starting the high-power electric vehicle charging system, the first charging module firstly filters and protects the input mains grid current through the electromagnetic interference filtering suppression circuit;

[0015] Step S2, the alternating current after passing through the electromagnetic interference filtering and suppressing circuit enters the rectifying circuit, the first rectifying circuit converts the alternating current into direct current, and outputs it to the first current output protection circuit; the direct current is corrected and protected by the three-phase PFC correction circuit and the direct current output protection circuit of the first current output protection circuit;

[0016] Step S3, the DC power output by the first current output protection circuit enters the second rectifier circuit through the DC input protection circuit of at least one second charging module; the second rectifier circuit converts the DC power into AC power again and sends it to the transformer circuit for voltage regulation;

[0017] Step S4: The alternating current regulated by the transformer circuit is converted into direct current adapted to the current battery pack charging through the second current output protection circuit, and connected to the input end of the battery pack for charging; at the same time, according to the actual charging demand, the system switches between the basic working mode, the extended working mode or the compatible working mode in real time to adapt to the charging requirements of different currents or voltages. By accurately adjusting the voltage and current, the charging requirements of different battery packs are met, and the charging compatibility and flexibility are improved. By collecting charging information in real time and intelligently adapting the charging strategy, the charging process is optimized, and the charging efficiency and battery health are improved. Accurate control of current and voltage is achieved to ensure the stability and safety of the charging process and improve the performance of the overall charging system.

[0018] As a further solution of the present invention: the first charging module includes an electromagnetic interference filtering suppression circuit connected to the input end of the mains power grid, a first rectifier circuit, and a first current output protection circuit connected to the output end of the first rectifier circuit. It effectively suppresses electromagnetic interference, protects the safety of the power grid and the charging equipment, and ensures stable output of the rectified current.

[0019] As a further solution of the present invention: the second charging module includes a current input protection circuit connected to the first current output protection circuit, a second rectifier circuit connected to the current input protection circuit, a transformer circuit connected to the second rectifier circuit, and a second current output protection circuit connected to the transformer circuit. Multiple protection mechanisms are provided to ensure the safety and stability of the current during transmission, while achieving flexible voltage regulation.

[0020] As a further solution of the present invention: the first charging module is connected to multiple battery packs through multiple second charging modules, and communication interfaces for transmitting the charging status, allowed charging voltage and current of the battery are provided between the battery pack and the first charging module and the second charging module. Independent charging and intelligent management of multiple battery packs are achieved, and the flexibility and scalability of the charging system are improved.

[0021] As a further solution of the present invention: the first current output protection circuit includes a three-phase PFC correction circuit and a DC output protection circuit, thereby improving the power factor, reducing grid pollution, and ensuring the stability and safety of the DC output.

[0022] As a further solution of the present invention: the battery packs are respectively connected to the output end of the second charging module, and the multi-voltage range of the second charging module supports charging of battery packs with multiple voltage ranges, thereby improving the compatibility and applicable range of the charging system from 0V to 200V.

[0023] As a further solution of the present invention: the charging system has three working modes: basic working mode, extended working mode, and compatible working mode, and the basic working mode adopts a standard fast charging or slow charging mode, the extended working mode adopts a customized charging mode for a specific battery pack or specific charging requirements, and the compatible working mode adopts a charging mode compatible with other charging systems and / or devices. Provide multiple working modes to meet charging requirements in different scenarios and improve the flexibility and compatibility of the charging system.

[0024] As a further solution of the present invention: the specific steps of switching the system between the basic working mode, the extended working mode or the compatible working mode in real time are:

[0025] Step S41: When the communication interface of the charging control unit detects the charging mode signal, it builds a model based on the SVM algorithm to determine the type of the charging mode signal, and at the same time wakes up the charging control unit to control the first charging module and the second charging module;

[0026] Step S42: After receiving the fast charge or slow charge mode signal, the charging control unit enters the basic working mode and sends a series of signals, including the fast charge or slow charge mode, the input voltage limit, and the input current limit;

[0027] Step S43: After receiving the customized charging mode signal, the extended working mode is entered, and a specific charging signal is sent according to the specific battery pack or specific charging requirements, including the specific battery pack or specific charging standard, input voltage limit, and input current limit;

[0028] Step S44: After receiving the other charging system and / or device mode, the compatible working mode is entered, and a mode switching signal including a charging system and / or device identification code, an input voltage limit, and an input current limit is sent through the charging control module.

[0029] As a further solution of the present invention: the specific steps of constructing the model based on the SVM algorithm are:

[0030] Use a dataset with known charging patterns to build a model based on the SVM algorithm for training;

[0031] Divide the data set into training set and test set, perform feature scaling, and standardize the data;

[0032] Select appropriate kernel function and penalty coefficient C to control the complexity and fault tolerance of the model and build the SVM model;

[0033] Use the training set to train the model and find the optimal hyperplane by maximizing the margin;

[0034] Use the trained model to predict the test set and get the final result of the charging mode signal.

[0035] The technical solution of the second aspect: a charging station, comprising a charging method based on a high-power charging system for an electric vehicle as described in any one of the above items.

[0036] Compared with the prior art, the present invention has the following technical effects:

[0037] The above-mentioned technical solution is adopted, by integrating the first charging module on the ground side and the second charging module on the vehicle side. The first charging module is responsible for filtering, rectifying and protecting the AC power supply and converting it into a stable DC power supply, while the second charging module receives this DC power supply and performs fine adjustment of the voltage and current to meet the charging needs of different battery packs. In addition, the system is also equipped with a charging control unit that can intelligently collect charging information and adapt the charging strategy. This solution not only supports the basic working mode of standard fast charging or slow charging, but also has an extended working mode for specific battery packs or needs, as well as a compatible working mode compatible with other charging systems, thereby significantly improving the flexibility, efficiency and safety of charging, and is widely applicable to a variety of charging scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:

[0039] Figure 1 A schematic diagram of the structure of a charging system according to an embodiment disclosed in the present application;

[0040] Figure 2 The figure is a flow chart of a charging method of a charging system according to an embodiment disclosed in the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Please refer to Figure 1 and Figure 2 In an embodiment of the present invention, a charging method based on a high-power charging system for an electric vehicle, the system includes:

[0043] The first charging module disposed at the ground end is responsible for filtering, rectifying and protecting the input AC power supply and converting it into a stable DC power supply;

[0044] A second charging module connected to the vehicle-mounted end of the first charging module is used to receive the DC power converted by the first charging module and adjust the voltage and current to adapt to different charging powers;

[0045] a battery pack connected to the second charging module; and

[0046] A charging control unit disposed between the battery pack and the first charging module and the second charging module for collecting charging information and then adapting charging;

[0047] The first charging module cooperates with the second charging module to charge the battery pack after rectifying and regulating the input current and voltage.

[0048] Specifically, the first charging module provided at the ground end and the second charging module connected to the vehicle end work in coordination.

[0049] The first charging module on the ground side plays a vital role. It is responsible for strictly filtering the input AC power to eliminate potential electromagnetic interference, and then converting the AC power into DC power through the rectifier circuit, and ensuring that the current and voltage in this conversion process are stable and safe. To protect the circuit from abnormal conditions such as overload or short circuit, the module is also equipped with an advanced protection mechanism.

[0050] At the same time, the second charging module on the vehicle receives the DC power from the first charging module and finely adjusts the voltage and current according to the charging requirements of different battery packs. The design of this module fully considers the diversity and charging efficiency of battery packs to ensure that each battery can get the most suitable charging conditions.

[0051] The battery pack is directly connected to the output end of the second charging module and is charged by receiving a precisely regulated DC power supply. In this process, the safety and charging efficiency of the battery pack are greatly guaranteed.

[0052] The system also introduces a charging control unit. This unit is located between the battery pack and the first charging module and the second charging module. It is responsible for real-time collection of charging information, such as the charging status and remaining power of the battery pack, and intelligently adapts the charging strategy based on this information. This not only ensures the efficiency of the charging process, but also greatly improves the service life and safety of the battery.

[0053] In this embodiment, the first charging module includes an electromagnetic interference filtering suppression circuit connected to the input end of the mains power grid, a first rectifier circuit, and a first current output protection circuit connected to the output end of the first rectifier circuit. It effectively suppresses electromagnetic interference, protects the safety of the power grid and the charging equipment, and ensures stable output of the rectified current.

[0054] In this embodiment, the design of the first charging module fully considers the efficiency and safety of power conversion, and its structure is not only sophisticated but also efficient.

[0055] Specifically, the module first includes an electromagnetic interference filtering and suppression circuit connected to the input end of the mains power grid. The role of this circuit is crucial. It can effectively filter out high-frequency noise and harmonic interference introduced from the mains power grid, thereby significantly reducing electromagnetic pollution and protecting the normal operation of surrounding electronic equipment, while also avoiding potential damage to the grid itself. Next, the first rectifier circuit is set in the module, which is responsible for converting alternating current (AC) into direct current (DC), which is an indispensable step in the charging process. The design of the rectifier circuit ensures that the energy loss during the conversion process is as small as possible, improving the overall energy utilization efficiency.

[0056] In addition, in order to further enhance the reliability and safety of the system, the present embodiment also cleverly integrates a first current output protection circuit at the output end of the first rectifier circuit. This circuit has multiple protection functions, including but not limited to overcurrent protection, short circuit protection, and overtemperature protection, and can monitor the state of the output current in real time. Once an abnormality is detected, such as excessive current or excessive temperature, it will quickly start protection measures to cut off or limit the current output, thereby effectively preventing the charging device and the connected device from being damaged due to abnormal current, and ensuring the safety of users and devices.

[0057] By integrating the electromagnetic interference filtering suppression circuit, the efficient rectification circuit and the comprehensive current output protection circuit, the first charging module in this embodiment can not only effectively suppress electromagnetic interference and protect the power grid and charging equipment from potential hazards, but also ensure that the rectified DC current can be output stably and safely, laying a solid foundation for the subsequent charging process. Such a design not only improves the charging efficiency, but also greatly enhances the safety and stability of the system.

[0058] In this embodiment, the first charging module is connected to multiple battery packs through multiple second charging modules, and communication interfaces for transmitting the charging status, allowed charging voltage and current of the battery are provided between the battery pack and the first charging module and the second charging module.

[0059] The first charging module uses a carefully designed architecture and cleverly uses multiple second charging modules as intermediaries to independently connect to multiple battery packs. This layout not only optimizes the charging process, but also significantly improves the overall efficiency of the charging system. What is more advanced is that high-performance communication interfaces are carefully set up between each battery pack and the first charging module and the corresponding second charging module. These interfaces undertake crucial tasks. They can transmit the battery's charging status information, the maximum allowable charging voltage and current value in real time and accurately, thereby ensuring the precise control and safe progress of the charging process. In this way, the system realizes independent charging and intelligent management of multiple battery packs, greatly improving the flexibility and scalability of the charging system, enabling it to easily cope with charging tasks of different scales and needs.

[0060] In this embodiment, the first current output protection circuit includes a three-phase PFC correction circuit and a DC output protection circuit, which improves the power factor, reduces grid pollution, and ensures the stability and safety of the DC output.

[0061] In terms of current output protection, the first current output protection circuit in this embodiment adopts an advanced three-phase power factor correction (PFC) circuit. This innovative design not only effectively improves the power factor and reduces harmonic pollution to the power grid, but also significantly enhances the energy efficiency of the system. At the same time, a precise DC output protection circuit is also integrated in the circuit, which can monitor and adjust the voltage and current of the DC output in real time to ensure that it can maintain a stable and safe output state under any circumstances, further ensuring the reliability and safety of the charging system.

[0062] In this embodiment, the battery packs are respectively connected to the output terminals of the second charging module, and the second charging module has a multi-voltage range of 0 V to 200 V. The charging of battery packs with multiple voltage ranges is supported, thereby improving the compatibility and application scope of the charging system.

[0063] In addition, this embodiment also pays special attention to the compatibility and scope of application of the charging system. To this end, each battery pack is cleverly connected to the output end of the corresponding second charging module, and these second charging modules have a significant feature-multi-voltage range support. This feature means that whether it is a high-voltage battery pack or a low-voltage battery pack, it can find a charging mode suitable for itself in this charging system, thereby achieving wide support for battery packs with multiple voltage ranges. This innovative design not only broadens the application field of the charging system, but also greatly improves its market competitiveness and user satisfaction.

[0064] In this embodiment, the charging system has three working modes: basic working mode, extended working mode, and compatible working mode. The basic working mode adopts a standard fast charging or slow charging mode, the extended working mode adopts a customized charging mode for a specific battery pack or specific charging requirements, and the compatible working mode adopts a charging mode compatible with other charging systems and / or devices. A variety of working modes are provided to meet charging requirements in different scenarios and improve the flexibility and compatibility of the charging system.

[0065] In this embodiment, the charging system is designed as a solution with high flexibility and wide compatibility, which is specifically manifested in that it integrates three working modes: basic working mode, extended working mode, and compatible working mode. In the basic working mode, the system follows widely recognized industry standards and adopts standard fast charging or slow charging modes to ensure universal support for most electric vehicles or devices, making it easy for users to quickly get started and use them in daily charging scenarios. This mode achieves an efficient and safe charging experience through standardized interface protocols and power regulation mechanisms.

[0066] It should be noted that the extended working mode provides a customized charging solution for specific battery packs or specific charging needs. This innovative design allows the system to automatically adjust the charging strategy according to the battery type (such as lithium-ion batteries, sodium-ion batteries, etc.), capacity, health status, and user's personalized preferences (such as rapid recovery of partial power, deep charge and discharge cycle management, etc.) to achieve the best charging effect, extend battery life, and reduce energy consumption and heat generation during charging. This customization capability enables the charging system to flexibly adapt to a variety of application scenarios, including but not limited to high-end electric vehicles, special-purpose vehicles, and battery management in scientific research experiments.

[0067] The compatible working mode is another highlight of the system, which is designed to ensure that the charging system can seamlessly connect and charge compatibly with other charging systems and / or devices. By integrating advanced communication protocol conversion technology and intelligent recognition algorithms, the system can automatically identify and adapt to charging interfaces and communication protocols of different brands and standards, such as CCS, CHAdeMO, GB / T, etc., to achieve versatility and interoperability in a variety of charging environments. This feature is of great significance for promoting the interconnection of charging infrastructure, improving the utilization rate of public charging stations, and promoting the standardization of the electric vehicle industry.

[0068] Therefore, by providing three complementary working modes, namely, basic working mode, extended working mode and compatible working mode, the charging system in this embodiment not only meets the charging needs in different scenarios, but also significantly improves the flexibility and compatibility of the system, bringing electric vehicle users a more convenient, efficient and personalized charging experience, but also provides strong technical support for the construction and upgrading of charging infrastructure.

[0069] In this embodiment, the steps of the charging method of the charging system are:

[0070] Step S1, starting the high-power electric vehicle charging system, the first charging module firstly filters and protects the input mains grid current through the electromagnetic interference filtering suppression circuit;

[0071] Step S2, the alternating current after passing through the electromagnetic interference filtering and suppressing circuit enters the rectifying circuit, the first rectifying circuit converts the alternating current into direct current, and outputs it to the first current output protection circuit; the direct current is corrected and protected by the three-phase PFC correction circuit and the direct current output protection circuit of the first current output protection circuit;

[0072] Step S3, the DC power output by the first current output protection circuit enters the second rectifier circuit through the DC input protection circuit of at least one second charging module; the second rectifier circuit converts the DC power into AC power again and sends it to the transformer circuit for voltage regulation;

[0073] Step S4: The alternating current regulated by the transformer circuit is converted into direct current suitable for charging the current battery pack through the second current output protection circuit, and connected to the input end of the battery pack for charging; at the same time, according to the actual charging needs, the system switches between the basic working mode, the extended working mode or the compatible working mode in real time to adapt to the charging requirements of different currents or voltages.

[0074] In this embodiment, the specific steps of switching the charging mode are:

[0075] like Figure 2 As shown, the figure is a schematic diagram of the charging method flow of the charging system;

[0076] Step S41: When the communication interface of the charging control unit detects the charging mode signal, it builds a model based on the SVM algorithm to determine the type of the charging mode signal, and at the same time wakes up the charging control unit to control the first charging module and the second charging module;

[0077] Among them, the specific steps of building a model based on the SVM algorithm are:

[0078] Use a dataset with known charging patterns to build a model based on the SVM algorithm for training;

[0079] Divide the data set into training set and test set, perform feature scaling, and standardize the data;

[0080] Select appropriate kernel function and penalty coefficient C to control the complexity and fault tolerance of the model and build the SVM model;

[0081] Use the training set to train the model and find the optimal hyperplane by maximizing the margin;

[0082] Use the trained model to predict the test set and get the final result of the charging mode signal.

[0083] Step S42: After receiving the fast charge or slow charge mode signal, the charging control unit enters the basic working mode and sends a series of signals, including the fast charge or slow charge mode, the input voltage limit, and the input current limit;

[0084] Step S43, after receiving the customized charging mode signal, it will enter the extended working mode, and send a specific charging signal based on the use of a specific battery pack or a specific charging requirement, including a specific battery pack or a specific charging standard, an input voltage limit, and an input current limit; in this mode, the charging control unit will send a specific charging signal to the first charging module and the second charging module based on the type, capacity, health status and other parameters of the specific battery pack, as well as the user's personalized charging needs. These signals include the selection of a specific battery pack or a specific charging standard, the input voltage limit, and the input current limit. This customized charging strategy can maximize the battery life while improving charging efficiency and safety.

[0085] Step S44: After receiving other charging system and / or device modes, the compatible working mode is entered, and a mode switching signal including a charging system and / or device identification code, an input voltage limit, and an input current limit is sent through the charging control module.

[0086] The charging control unit realizes the recognition and adaptation of other charging systems and equipment modes through multiple steps such as communication protocol recognition, equipment information recognition, intelligent recognition algorithm, and compatible mode switching. These technical-level interaction and recognition mechanisms ensure that the charging system can seamlessly connect with other charging equipment to achieve charging compatibility and interoperability.

[0087] In order to improve the accuracy and efficiency of recognition, the charging control unit may adopt an intelligent recognition algorithm.

[0088] These algorithms may include techniques such as machine learning and deep learning to quickly analyze and process the received data.

[0089] Algorithm optimization:

[0090] In actual applications, the charging control unit may continuously optimize its identification algorithms and strategies based on the interaction experience with other charging systems or devices.

[0091] This helps the charging control unit better adapt to charging devices of different brands and models, improving charging compatibility and interoperability.

[0092] The technical solution of the second aspect: a charging station, comprising a charging method based on a high-power charging system for an electric vehicle as described in any one of the above items.

[0093] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents, and all should be included within the scope of protection of the present invention.

Claims

1. A charging method based on a high-power charging system for an electric vehicle, characterized in that: The system comprises: The first charging module disposed at the ground end is responsible for filtering, rectifying and protecting the input AC power supply and converting it into a stable DC power supply; A second charging module connected to the vehicle-mounted end of the first charging module is used to receive the DC power converted by the first charging module and adjust the voltage and current to adapt to different charging powers; a battery pack connected to the second charging module; and A charging control unit disposed between the battery pack and the first charging module and the second charging module for collecting charging information and then adapting charging; The first charging module cooperates with the second charging module to rectify and adjust the input current and voltage, and then charges the battery pack; The charging method steps of the charging system are as follows: Step S1, starting the high-power electric vehicle charging system, the first charging module firstly filters and protects the input mains grid current through the electromagnetic interference filtering suppression circuit; Step S2, the alternating current after passing through the electromagnetic interference filtering and suppressing circuit enters the rectifying circuit, the first rectifying circuit converts the alternating current into direct current, and outputs it to the first current output protection circuit; the direct current is corrected and protected by the three-phase PFC correction circuit and the direct current output protection circuit of the first current output protection circuit; Step S3, the DC power output by the first current output protection circuit enters the second rectifier circuit through the DC input protection circuit of at least one second charging module; the second rectifier circuit converts the DC power into AC power again and sends it to the transformer circuit for voltage regulation; Step S4: The alternating current regulated by the transformer circuit is converted into direct current suitable for charging the current battery pack through the second current output protection circuit, and connected to the input end of the battery pack for charging; at the same time, according to the actual charging needs, the system switches between the basic working mode, the extended working mode or the compatible working mode in real time to adapt to the charging requirements of different currents or voltages.

2. According to claim 1, a charging method based on a high-power charging system for an electric vehicle is characterized in that: The first charging module includes an electromagnetic interference filtering suppression circuit connected to the input end of the mains power grid, a first rectifier circuit, and a first current output protection circuit connected to the output end of the first rectifier circuit.

3. According to claim 2, a charging method based on a high-power charging system for an electric vehicle is characterized in that: The second charging module includes a current input protection circuit connected to the first current output protection circuit, a second rectifier circuit connected to the current input protection circuit, a transformer circuit connected to the second rectifier circuit, and a second current output protection circuit connected to the transformer circuit.

4. According to claim 3, a charging method based on a high-power charging system for an electric vehicle is characterized in that: The first charging module is connected to a plurality of battery packs through a plurality of second charging modules, and communication interfaces for transmitting the charging status, allowed charging voltage and current of the battery are provided between the battery pack and the first charging module and the second charging module.

5. According to claim 4, a charging method based on a high-power charging system for electric vehicles is characterized in that: The first current output protection circuit includes a three-phase PFC correction circuit and a DC output protection circuit.

6. According to claim 4, a charging method based on a high-power charging system for electric vehicles is characterized in that: The battery packs are respectively connected to the output terminals of the second charging module, and the multi-voltage range of the second charging module is 0V to 200V.

7. A charging method based on a high-power charging system for electric vehicles according to claim 6, characterized in that: The charging system has three working modes: basic working mode, extended working mode, and compatible working mode. The basic working mode adopts a standard fast charging or slow charging mode, the extended working mode adopts a customized charging mode for a specific battery pack or specific charging requirements, and the compatible working mode adopts a charging mode that is compatible with other charging systems and / or devices.

8. A charging method based on a high-power charging system for electric vehicles according to claim 7, characterized in that: The specific steps of the system switching between the basic working mode, the extended working mode or the compatible working mode in real time are: Step S41: When the communication interface of the charging control unit detects the charging mode signal, it builds a model based on the SVM algorithm to determine the type of the charging mode signal, and at the same time wakes up the charging control unit to control the first charging module and the second charging module; Step S42: After receiving the fast charge or slow charge mode signal, the charging control unit enters the basic working mode and sends a series of signals, including the fast charge or slow charge mode, the input voltage limit, and the input current limit; Step S43: After receiving the customized charging mode signal, the extended working mode is entered, and a specific charging signal is sent according to the specific battery pack or specific charging requirements, including the specific battery pack or specific charging standard, input voltage limit, and input current limit; Step S44: After receiving the other charging system and / or device mode, the compatible working mode is entered, and a mode switching signal including a charging system and / or device identification code, an input voltage limit, and an input current limit is sent through the charging control module.

9. A charging method based on a high-power charging system for electric vehicles according to claim 8, characterized in that: The specific steps of constructing the model based on the SVM algorithm are: Use a dataset with known charging patterns to build a model based on the SVM algorithm for training; Divide the data set into training set and test set, perform feature scaling, and standardize the data; Select appropriate kernel function and penalty coefficient C to control the complexity and fault tolerance of the model and build the SVM model; Use the training set to train the model and find the optimal hyperplane by maximizing the margin; Use the trained model to predict the test set and get the final result of the charging mode signal.

10. A charging station, characterized in that: The charging station includes a charging method for an ultra-high power multi-voltage range charging system as described in any one of claims 1 to 8.

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