A charging method and charging station of a high-power charging system based on an electric vehicle

Abstract

The application discloses a charging method and charging station of a high-power charging system based on an electric vehicle, which comprises a first charging module arranged at a ground end and used for filtering, rectifying and protecting input alternating current power and converting the alternating current power into stable direct current power; a second charging module connected to a vehicle-mounted end of the first charging module and used for receiving the direct current power converted by the first charging module and adjusting voltage and current to adapt to different charging powers; a battery pack connected to the second charging module; and a charging control unit arranged between the battery pack and the first charging module and the second charging module and used for collecting charging information and then adapting charging; and the battery pack is charged after rectification and adjustment of input current and voltage. Through close cooperation of the charging modules and intelligent management of the charging control unit, the application can accurately rectify and adjust input current and voltage and meet the high-power charging demand of different battery packs.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery chargers, in particular to a charging method and charging station of a high-power charging system based on electric vehicles. BACKGROUND

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

[0003] However, with the continuous progress of battery technology, battery capacity is increasing, which poses higher challenges to chargers. In order to meet the charging needs of larger capacity batteries, the charging current needs to be increased while keeping the charging time unchanged. This change makes the design of the charger more complex, and the requirements for hardware and software are also increased.

[0004] In addition, the increase in charging current also brings another problem: the wire harness connecting the charger and the vehicle needs to be thickened to withstand greater current. This not only increases the inconvenience of use, such as heavier wire harnesses, more difficult to carry and store, but also significantly increases the overall cost of the charging system. Another notable problem 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 use existing charging pile infrastructure, and cannot fully enjoy the convenience and economy of charging infrastructure.

[0005] The deficiencies of the prior art are: the increase in charger design complexity, as the charging current increases, the design difficulty and cost of the charger are increased; the inconvenience and cost increase brought by the thickening of the wire harness, the thickening of the wire 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 between industrial vehicles and national standard charging piles is not matched, which limits the utilization rate and economic benefits of charging infrastructure. SUMMARY

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

[0007] A charging method of a high-power charging system based on electric vehicles, the system comprises:

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

[0009] The second charging module connected to the vehicle-mounted end of the first charging module is used for receiving the DC power converted by the first charging module and adjusting the voltage and current to adapt to different charging power;

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

[0011] The charging control unit arranged between the battery pack and the first charging module and the second charging module collects charging information and adapts charging;

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

[0013] The charging method of the charging system comprises the following steps:

[0014] In step S1, the high-power electric vehicle charging system is started, and the first charging module first filters and protects the input power grid current through an electromagnetic interference filtering and suppression circuit;

[0015] In step S2, the AC power after the electromagnetic interference filtering and suppression circuit enters a rectifier circuit, the first rectifier circuit converts the AC power into DC power and outputs it to a first current output protection circuit; the three-phase PFC correction circuit and the DC output protection circuit of the first current output protection circuit are used to correct and protect the DC power;

[0016] In step S3, the DC power output by the first current output protection circuit enters a 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 a voltage regulation circuit for voltage regulation;

[0017] In step S4, the AC power after the voltage regulation circuit is converted into DC power suitable for charging the current battery pack by a 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 different current or voltage charging requirements. By accurately adjusting the voltage and current, the charging demand of different battery packs is met, and the compatibility and flexibility of charging 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. The accurate control of current and voltage is realized to ensure the stability and safety of the charging process and improve the performance of the overall charging system.

[0018] As a further scheme of the present application: the first charging module comprises an electromagnetic interference filtering suppression circuit connected to the input end of the power grid, a first rectifier circuit, and a first current output protection circuit connected to the output end of the first rectifier circuit. The electromagnetic interference is effectively suppressed, the safety of the power grid and the charging device is protected, and the stable output of the rectified current is ensured.

[0019] As a further scheme of the present application: the second charging module comprises 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 voltage conversion circuit connected to the second rectifier circuit, and a second current output protection circuit connected to the voltage conversion circuit. A multiple protection mechanism is provided to ensure the safety and stability of the current during transmission, and flexible adjustment of the voltage is realized.

[0020] As a further scheme of the present application: the first charging module is connected to a plurality of battery groups through a plurality of second charging modules, and a communication interface for transmitting the charging state, the allowed charging voltage and current of the battery is arranged between the battery group and the first charging module and the second charging module. Independent charging and intelligent management of multiple battery groups are realized, and the flexibility and scalability of the charging system are improved.

[0021] As a further scheme of the present application: the first current output protection circuit comprises a three-phase PFC correction circuit and a direct current output protection circuit. The power factor is improved, the pollution of the power grid is reduced, and the stability and safety of the direct current output are ensured.

[0022] As a further scheme of the present application: the battery group is connected to the output end of the second charging module, and the second charging module has a plurality of voltage ranges. The charging of battery groups with multiple voltage ranges is supported, and the compatibility and application range of 0V-200V of the charging system are improved.

[0023] As a further scheme of the present application: the charging system has three working modes of a basic working mode, an extended working mode and a 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 specific battery groups or specific charging requirements, and the compatible working mode adopts a charging mode compatible with other charging systems and / or devices. Multiple working modes are provided to meet the charging requirements in different scenarios, and the flexibility and compatibility of the charging system are improved.

[0024] As a further scheme of the present application: the specific steps of the system for switching between the basic working mode, the extended working mode or the compatible working mode in real time are as follows:

[0025] Step S41, when the communication interface of the charging control unit detects the charging mode signal, the charging control unit determines the type of the charging mode signal based on the SVM algorithm model, and wakes up the charging control unit to control the first charging module and the second charging module;

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

[0027] Step S43, after receiving the type of customized charging mode signal, the charging control unit enters the extended working mode, and sends specific charging signals according to the specific battery pack or specific charging demand, including the specific battery pack or specific charging standard, the input voltage limit value, and the input current limit value;

[0028] Step S44, after receiving the type of other charging system and / or equipment mode, the charging control unit enters the compatible working mode, and sends mode switching signals through the charging control module, including the charging system and / or equipment identification code, the input voltage limit value, and the input current limit value.

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

[0030] Use the known charging mode data set to train the model based on the SVM algorithm;

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

[0032] Select a suitable kernel function and a penalty coefficient C to control the complexity and fault tolerance of the model, and construct the SVM model;

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

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

[0035] The technical scheme of the second aspect: a charging station, the charging station comprises a charging method of a high-power charging system based on an electric vehicle according to any one of the above.

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

[0037] By means of the technical scheme, the first charging module integrated with the ground end and the second charging module integrated with the vehicle-mounted end are adopted, the first charging module is responsible for converting the AC power into stable DC power after filtering, rectifying and protecting, and the second charging module receives the DC power and finely adjusts the voltage and current to adapt to the charging requirements of different battery packs. In addition, the system is also equipped with a charging control unit which can intelligently collect charging information and adapt charging strategies. This scheme not only supports the basic working modes of standard fast charging or slow charging, but also has extended working modes for specific battery packs or requirements, and compatible working modes with other charging systems, thereby significantly improving the flexibility, efficiency and safety of charging, and being widely applicable to various charging scenes. BRIEF DESCRIPTION OF DRAWINGS

[0038] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings:

[0039] Figure 1 FIG. 1 is a structural schematic diagram of a charging system according to an embodiment of the present application;

[0040] Figure 2 FIG. 2 is a flowchart of a charging method of the charging system according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

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

[0043] A first charging module arranged at the ground end, configured to filter, rectify and protect the input AC power, and convert it into stable DC power;

[0044] A second charging module connected to the vehicle-mounted end of the first charging module, configured 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 arranged between the battery pack and the first charging module and the second charging module, configured to collect charging information and adapt charging after collecting the charging information;

[0047] The first charging module cooperates with the second charging module to rectify and regulate the input current and voltage, and then charges the battery pack.

[0048] Specifically, the first charging module provided at the ground end cooperates with the second charging module connected to the vehicle-mounted end.

[0049] The first charging module at the ground end plays a crucial role, which is responsible for strictly filtering the input alternating current power to eliminate potential electromagnetic interference, and then converting the alternating current into direct current through a rectifier circuit, and ensuring the stability and safety of the current and voltage in this conversion process. In order to protect the circuit from overload or short circuit and other abnormal conditions, the module is also equipped with advanced protection mechanism.

[0050] At the same time, the second charging module at the vehicle-mounted end receives the direct current 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 the battery pack, ensuring 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 the precisely adjusted direct current power. 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, responsible for real-time collection of charging information such as the charging state of the battery pack, the remaining power, etc., and intelligent adaptation of charging strategies according to these 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 and suppression circuit connected to the input end of the power grid, a first rectifier circuit, and a first current output protection circuit connected to the output end of the first rectifier circuit. Effective suppression of electromagnetic interference, protection of the safety of the power grid and charging equipment, and stable output of the rectified current are ensured.

[0054] In this embodiment, the design of the first charging module fully considers the efficiency and safety of electric energy conversion, and its composition is not only fine but also efficient.

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

[0056] In addition, to further enhance the reliability and safety of the system, the first current output protection circuit is ingeniously integrated at the output end of the first rectifier circuit in this embodiment. 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 anomaly is detected, such as excessive current or high temperature, the protection measures will be quickly activated to cut off or limit the current output, effectively preventing the charging equipment and connected devices from being damaged due to abnormal current, and ensuring the safety of users and equipment.

[0057] By integrating the electromagnetic interference filter suppression circuit, the efficient rectifier circuit, and the comprehensive current output protection circuit, the first charging module in this embodiment not only effectively suppresses electromagnetic interference, protecting the power grid and charging equipment from potential harm, but also ensures that the rectified direct current can be output stably and safely, laying a solid foundation for the subsequent charging process. Such 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 state, allowable charging voltage, and current of the battery are provided between the battery packs and the first and second charging modules.

[0059] The first charging module is connected to multiple battery packs through multiple second charging modules as intermediaries. This layout not only optimizes the charging process but also significantly improves the overall efficiency of the charging system. Moreover, each battery pack is connected to the first charging module and the corresponding second charging module through a high-performance communication interface. These interfaces play a crucial role in transmitting real-time and accurate information about the battery's charging status, maximum allowed voltage, and current value, ensuring precise control and safety during the charging process. This way, the system achieves independent charging and intelligent management of multiple battery packs, greatly improving the flexibility and scalability of the charging system, making it easily adapt to different scales and charging needs.

[0060] In this embodiment, the first current output protection circuit includes a three-phase PFC correction circuit and a DC output protection circuit. It improves the power factor, reduces the pollution of the power grid, 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 uses 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 system's energy efficiency. At the same time, the circuit also integrates a precise DC output protection circuit that can monitor and adjust the voltage and current of the DC output in real time, ensuring stable and safe output in any situation, further ensuring the reliability and safety of the charging system.

[0062] In this embodiment, each battery pack is connected to the output of a second charging module, and the second charging module has a voltage range of 0V-200V. This supports charging of battery packs with multiple voltage ranges, improving the compatibility and application range of the charging system.

[0063] In addition, this embodiment also focuses on the compatibility and application range of the charging system. For this purpose, each battery pack is connected to the output of the corresponding second charging module, and these second charging modules have a significant feature - multi-voltage range support. This means that both high-voltage and low-voltage battery packs can find a suitable charging mode in this charging system, 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 standard fast charging or slow charging mode, the extended working mode adopts customized charging mode for specific battery packs or specific charging needs, and the compatible working mode adopts charging mode compatible with other charging systems and / or devices. Providing multiple working modes meets the charging needs in different scenarios and improves the flexibility and compatibility of the charging system.

[0065] In this embodiment, the charging system is designed as a highly flexible and widely compatible solution, which 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 mode, ensuring general support for most electric vehicles or devices, facilitating users to quickly start and use in daily charging scenarios. This mode realizes efficient and safe charging experience through standardized interface protocol and power regulation mechanism.

[0066] It should be noted that the extended working mode provides customized charging solutions for specific battery packs or specific charging needs. This innovative design allows the system to automatically adjust the charging strategy according to the type of battery (such as lithium-ion battery, sodium-ion battery, etc.), capacity, health status, and user's individual preferences (such as fast recovery of partial power, deep charge-discharge cycle management, etc.), to achieve optimal charging effect, prolong battery life, and reduce energy consumption and heat generation during charging. This customization capability enables the charging system to flexibly adapt to various 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 aims to ensure that the charging system can seamlessly interface and charge 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 different brands, different standards of charging interfaces and communication protocols, such as CCS, CHAdeMO, GB / T, etc., thereby realizing universality and interoperability in various 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 development of the electric vehicle industry.

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

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

[0070] In step S1, the high-power electric vehicle charging system is started, and the first charging module first filters and protects the input power grid current through an electromagnetic interference filtering and suppression circuit;

[0071] In step S2, the alternating current after the electromagnetic interference filtering and suppression circuit enters a rectifier circuit, the first rectifier circuit converts the alternating current into direct current and outputs to a first current output protection circuit; the three-phase PFC correction circuit and the direct current output protection circuit of the first current output protection circuit are used to correct and protect the direct current;

[0072] In step S3, the direct current output by the first current output protection circuit enters a second rectifier circuit through the direct current input protection circuit of at least one second charging module; the second rectifier circuit converts the direct current into alternating current again and sends it to a voltage regulation circuit for voltage regulation;

[0073] In step S4, the alternating current after the voltage regulation circuit is converted into direct current suitable for the current battery pack charging by a 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 different current or voltage charging requirements.

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

[0075] As shown in Figure 2 , the figure is a charging method flowchart of the charging system;

[0076] In step S41, when the communication interface of the charging control unit detects the charging mode signal, it constructs a model based on the SVM algorithm to judge 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] The specific steps of constructing a model based on the SVM algorithm are as follows:

[0078] Use the known charging mode dataset to train the model based on the SVM algorithm;

[0079] Divide the dataset into training and test sets and perform feature scaling to normalize the data.

[0080] Select an appropriate kernel function and penalty coefficient C to control the complexity and fault tolerance of the model, and build an 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 type of fast charging or slow charging mode signal, the charging control unit will enter the basic working mode and send a series of signals, including fast charging or slow charging mode, input voltage limit, and input current limit.

[0084] Step S43, after receiving the customized charging mode signal, it will enter the extended working mode, according to the specific battery group or specific charging demand, send specific charging signal, including specific battery group or specific charging standard, input voltage limit, and input current limit; In this mode, the charging control unit will send specific charging signals to the first charging module and the second charging module according to the type, capacity, health status and other parameters of the specific battery group, and the user's personalized charging demand. These signals include the selection of specific battery group or specific charging standard, input voltage limit, and input current limit. This customized charging strategy can maximize the service life of the battery, while improving charging efficiency and safety.

[0085] Step S44, after receiving other charging system and / or equipment mode, it will enter the compatible working mode, through the charging control module sends mode switching signal, including charging system and / or equipment identification code, input voltage limit, and input current limit.

[0086] The charging control unit realizes the recognition and adaptation of other charging system and equipment mode through multiple steps such as communication protocol recognition, device information recognition, intelligent recognition algorithm and compatible mode switching. These technical level interaction and recognition mechanism ensure that the charging system can be seamlessly connected with other charging equipment, realizing the compatibility and interoperability of charging.

[0087] In order to improve the accuracy and efficiency of identification, the charging control unit may use intelligent recognition algorithms.

[0088] These algorithms may include machine learning, deep learning and other technologies for rapid analysis and processing of received data.

[0089] Algorithm optimization:

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

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

[0092] The technical solution of the second aspect: a charging station, the charging station comprises a high-power charging system for electric vehicles based on the charging method of any one of the above.

[0093] Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents, and all should be included within the scope of protection of the present application.

Claims

1. A charging method for a high-power charging system based on an electric vehicle, characterized by, The system comprises: The first charging module arranged at the ground end is used for filtering, rectifying and protecting the input alternating current power and converting it into stable direct current power; The second charging module connected to the vehicle-mounted end of the first charging module is used for receiving the direct current power converted by the first charging module and adjusting the voltage and current to adapt to different charging power; The battery pack connected to the second charging module; and The charging control unit arranged between the battery pack and the first charging module and the second charging module is used for collecting charging information and adapting charging; The first charging module cooperates with the second charging module to rectify and adjust the input current and voltage and charge the battery pack; The charging method of the charging system comprises the following steps: Step S1, starting the high-power electric vehicle charging system, the first charging module first filters and protects the input power grid current through an electromagnetic interference filtering suppression circuit; Step S2, the alternating current after the electromagnetic interference filtering suppression circuit enters a rectifier circuit, the first rectifier circuit converts the alternating current into direct current and outputs it to a first current output protection circuit; the three-phase PFC correction circuit and the direct current output protection circuit of the first current output protection circuit are used to correct and protect the direct current; Step S3, the direct current output by the first current output protection circuit enters a second rectifier circuit through the direct current input protection circuit of at least one second charging module; the second rectifier circuit converts the direct current into alternating current again and sends it to a voltage regulation circuit for voltage regulation; Step S4, the alternating current after the voltage regulation circuit adjusts is converted into direct current suitable for the current battery pack charging by a 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 different current or voltage charging requirements; The charging system has three working modes, i.e., the basic working mode, the extended working mode and the compatible working mode, wherein the basic working mode adopts a standard fast charging or slow charging mode, the extended working mode adopts a customized charging mode for specific battery packs or specific charging demands, and the compatible working mode adopts a charging mode compatible with other charging systems and / or devices; The specific steps that the system switches between the basic working mode, the extended working mode or the compatible working mode in real time are as follows: Step S41, when the communication interface of the charging control unit detects a charging mode signal, it constructs a model based on the SVM algorithm to judge the type of the charging mode signal and wakes up the charging control unit to control the first charging module and the second charging module; Step S42, after receiving the type of fast charging or slow charging mode signal, the charging control unit enters the basic working mode and sends a series of signals, including the fast charging or slow charging mode, the input voltage limit and the input current limit; Step S43, after receiving the signal of the type of customized charging mode, the extended working mode is entered, and the specific charging signal is sent according to the specific battery pack or specific charging demand, including the specific battery pack or specific charging standard, input voltage limit, and input current limit; Step S44, after receiving the signal of the type of other charging system and / or equipment mode, the compatible working mode is entered, and the mode switching signal is sent through the charging control module, including the charging system and / or equipment identification code, input voltage limit, and input current limit; The specific steps of constructing the model based on the SVM algorithm are: Using the known charging mode dataset to train the model based on the SVM algorithm; Divide the dataset into training set and test set, and perform feature scaling to standardize the data; Select a suitable kernel function and penalty coefficient C to control the complexity and fault tolerance of the model, and construct the SVM model; Train the model using the training set, and find the optimal hyperplane by maximizing the interval; Use the trained model to predict the test set to get the final result of the charging mode signal.

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

3. The charging method of a high-power charging system based on an electric vehicle according to claim 2, 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 voltage conversion circuit connected to the second rectifier circuit, and a second current output protection circuit connected to the voltage conversion circuit.

4. The charging method of a high-power charging system based on an electric vehicle according to claim 3, characterized in that, The first charging module is connected to multiple battery packs through multiple second charging modules, and a communication interface for transmitting the charging state, allowed charging voltage and current of the battery is arranged between the battery pack and the first charging module and the second charging module.

5. The charging method of a high-power charging system based on an electric vehicle according to claim 4, characterized in that, The first current output protection circuit includes a three-phase PFC correction circuit and a direct current output protection circuit.

6. The charging method of a high-power charging system based on an electric vehicle according to claim 4, characterized in that, The battery pack is connected to the output end of the second charging module, and the voltage range of the second charging module is 0V~200V.

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