A charging system for a cable crane
Patent Information
- Application Number
- CN202522200043.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-17
AI Technical Summary
[0004]本实用新型的实施例提供一种履带起重机的充电系统，以通过下车充电盒、车载充电装置及连接二者的电滑环所构成的结构，解决了现有技术中充电系统无法兼容欧标交流充电与工业交流充电、且缺乏安全监测与整车交互能力的问题，实现了两种充电模式的自动识别与切换、充电过程的实时监测与控制、以及充电安全性与整机作业兼容性的显著提升
[0015]本实用新型实施例提供的履带起重机的充电系统通过构建以下车充电盒、电滑环、车载充电装置为核心的物理架构，从结构层面实现了根本性的技术效果。电滑环作为连接回转平台上下车的关键电气通道，其结构设计确保了在起重机进行吊载、回转等作业时，下车充电盒与位于上车平台的车载充电装置之间充电控制信号与反馈信号的持续传输，实现了充电不停工的并行作业能力。下车充电盒集成了充电接口、控制器及操作按钮等结构，形成面向外部充电设备的标准化和本地化操作界面；而车载充电装置作为中央处理单元，通过接收来自下车充电盒的信号，其内部集成的检测与控制电路结构能够自动识别控制引导信号的有无，以此作为物理判据切换充电流程。本系统结构上的紧密配合，从硬件上原生地兼容了两种不同的充电体系，通过结构化的信号传递与反馈路径，将充电确认、模式切换、电子锁控制、安全监测等功能固化为稳定、自动化的物理过程，在根源上解决兼容性、安全性与作业效率的问题。
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Figure CN224796789U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane technology, specifically to a charging system for a crawler crane. Background Technology
[0002] With global energy shortages and increasing environmental awareness, electric crawler cranes have gained widespread recognition and use from customers due to their energy-saving and environmentally friendly characteristics. Currently, electric crawler cranes mainly rely on European standard AC charging piles or industrial AC charging. However, European standard AC charging piles have limited power, with a maximum of only 20kW, which is insufficient to meet high-power charging demands. While industrial AC charging can provide high power, it lacks unified safety standards and cannot achieve real-time temperature monitoring and effective interaction with the vehicle during the charging process.
[0003] In existing technologies, industrial charging methods lack low-voltage connection confirmation signals and charging base temperature detection functions, and are not compatible with European standard AC charging functions, resulting in defects in the charging system in terms of safety and compatibility. Utility Model Content
[0004] This utility model provides a charging system for a crawler crane. The system consists of an undercarriage charging box, an on-board charging device, and an electric slip ring connecting the two. This system solves the problems in the prior art where charging systems are incompatible with European standard AC charging and industrial AC charging, and lack safety monitoring and vehicle interaction capabilities. It achieves automatic identification and switching between the two charging modes, real-time monitoring and control of the charging process, and a significant improvement in charging safety and overall machine operation compatibility.
[0005] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: In a first aspect, this utility model embodiment provides a charging system for a crawler crane, the system comprising: an undercarriage charging box and an on-board charging device, wherein the undercarriage charging box and the on-board charging device are connected by an electric slip ring; The on-board charging device is used to detect whether there is a control guidance signal from the target charging device, obtain the detection result, start the corresponding charging mode according to the detection result, and send a feedback signal to the off-vehicle charging box through the slip ring. The off-vehicle charging box is used to receive feedback signals sent by the on-board charging device and to use the feedback signals to trigger the target charging device to output three-phase AC power.
[0006] Furthermore, the system also includes: The on-board charging device is used to start a first charging mode based on the control guidance signal if the control guidance signal is detected, and to send a first feedback signal to the off-board charging box through the slip ring. The off-vehicle charging box is used to receive the first feedback signal and use the first feedback signal to trigger the target charging device to output three-phase AC power.
[0007] Furthermore, the system also includes: The off-vehicle charging box is used to transmit the three-phase AC power to the on-board charging device through the slip ring; The on-board charging device is used to receive the three-phase AC power, convert the three-phase AC power into DC power according to the first charging parameters corresponding to the first charging mode, and transmit the DC power to the energy storage device.
[0008] Furthermore, the system also includes: The on-board charging device is used to send a second feedback signal to the off-vehicle charging box via the slip ring if the control guidance signal is not detected. The off-vehicle charging box is used to receive the second feedback signal, monitor the user input signal, generate a charging start command based on the user input signal, and send the charging start command to the on-board charging device through the electric slip ring. The on-board charging device is used to receive the charging start command, start the second charging mode based on the charging start command, and send the charging start command to the off-vehicle charging box through the electric slip ring; The off-vehicle charging box is used to receive the charging start command and use the charging start command to trigger the target charging device to output three-phase AC power.
[0009] Furthermore, the system also includes: The off-vehicle charging box is used to transmit the three-phase AC power to the on-board charging device through the slip ring; The on-board charging device is used to receive the three-phase AC power, convert the three-phase AC power into DC power according to the second charging parameters corresponding to the charging start command, and transmit the DC power to the energy storage device.
[0010] Furthermore, the system also includes: The off-vehicle charging box is used to detect connection signals from the charging device and send the connection signals to the on-board charging device via the slip ring. The on-board charging device is used to receive the connection signal and send a locking command to the off-vehicle charging box through the slip ring; The off-vehicle charging box is used to receive the locking command, control the electronic lock in the off-vehicle charging box to perform the locking operation according to the locking command, and send the locking status of the electronic lock to the on-board charging device through the slip ring. The on-board charging device is used to receive the locking status of the electronic lock and determine that the charging device corresponding to the connection signal is the target charging device in a connected state.
[0011] Furthermore, the system also includes an energy storage device, wherein the energy storage device is connected to the on-board charging device; The energy storage device is used to output direct current to the on-board charging device; The on-board charging device is used to invert the DC power into three-phase AC power and transmit the three-phase AC power to the off-board charging box; The off-vehicle charging box is used to transmit the three-phase AC power to the target charging device.
[0012] Furthermore, the system also includes: a circuit breaker box, disposed between the off-vehicle charging box and the slip ring, for providing fault protection for the three-phase line between the circuit breaker box and the on-board charging device.
[0013] Furthermore, the off-vehicle charging box also includes a temperature sensor for monitoring the temperature signal of the target charging device and transmitting the temperature signal to the on-board charging device through the slip ring, so that the on-board charging device can perform corresponding control operations based on the temperature signal.
[0014] Furthermore, the charging box after disembarking also includes an interaction component for monitoring user input signals. If the user input signal is a start signal, the component parses the second charging parameter in the user input signal and uses the second charging parameter to generate a charging start command. Alternatively, if the user input signal is a stop signal, the component converts the stop signal into a charging stop command.
[0015] The charging system for a crawler crane provided in this embodiment of the invention achieves fundamental technical benefits from a structural perspective by constructing a physical architecture centered on an undercarriage charging box, an electric slip ring, and an on-board charging device. The electric slip ring, as a key electrical channel connecting the upper and lower carriages of the slewing platform, is designed to ensure continuous transmission of charging control and feedback signals between the undercarriage charging box and the on-board charging device located on the upper carriage platform during lifting and slewing operations, enabling parallel operation with uninterrupted charging. The undercarriage charging box integrates a charging interface, controller, and operation buttons, forming a standardized and localized operating interface for external charging equipment. The on-board charging device, as a central processing unit, receives signals from the undercarriage charging box, and its integrated detection and control circuitry automatically identifies the presence or absence of control guidance signals, using this as a physical criterion to switch the charging process. The close integration of this system's structure natively enables compatibility with two different charging systems at the hardware level. Through structured signal transmission and feedback paths, functions such as charging confirmation, mode switching, electronic lock control, and safety monitoring are solidified into stable and automated physical processes, fundamentally solving the problems of compatibility, safety, and operational efficiency. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A schematic diagram of the charging system for a tracked crane provided in an embodiment of this utility model; Figure 2 A schematic diagram of the charging system of another crawler crane provided in this embodiment of the present utility model; Figure 3 This is a structural schematic diagram of a charging system for another tracked crane provided in an embodiment of the present utility model. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Figure 1This is a structural schematic diagram of a charging system for a crawler crane provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the system includes: an off-vehicle charging box 100 and an on-vehicle charging device 200, wherein the off-vehicle charging box 100 and the on-vehicle charging device 200 are connected by an electric slip ring 300. The on-board charging device 200 is used to detect whether there is a control guidance signal from the target charging device, obtain the detection result, start the corresponding charging mode according to the detection result, and send a feedback signal to the off-vehicle charging box 100 through the slip ring 300. The off-vehicle charging box 100 is used to receive feedback signals sent by the on-board charging device 200 and to use the feedback signals to trigger the target charging device to output three-phase AC power.
[0020] Specifically, the slip ring 300, as a key electrical rotary connector connecting the upper and lower parts of the crane's slewing platform, establishes a stable signal transmission channel between the lower charging box 100 and the on-board charging device 200 located on the upper platform. After the lower charging box 100 is connected to an external charging gun, the on-board charging device 200 detects the presence or absence of a control guidance signal (CP signal) through this physical channel to automatically identify the type of charging equipment. If a CP signal is detected, the standard European standard charging process is entered; if no signal is detected, the industrial charging process is started, and the corresponding control feedback signal is transmitted back to the lower charging box 100 through the slip ring 300, ultimately triggering the output control of three-phase AC power.
[0021] The special rotating connection structure of the electric slip ring enables the crane to continue rotating during charging, achieving functional compatibility. The distributed layout and signal interaction mechanism between the off-board charging box and the on-board charging device ensure automatic identification and seamless switching between the two charging standards from a physical perspective. The overall structure provides a reliable hardware foundation for the charging system, meeting the requirements of European standard charging, expanding the high-power demand of industrial charging, and ensuring operational safety and system reliability.
[0022] As an optional solution of this utility model, the system further includes: The on-board charging device 200 is used to start a first charging mode based on the control guidance signal if a control guidance signal is detected, and to send a first feedback signal to the off-board charging box 100 through the slip ring 300. The off-vehicle charging box 100 is used to receive the first feedback signal and use the first feedback signal to trigger the target charging device to output three-phase AC power.
[0023] Specifically, when the external European standard charging gun is connected to the charging socket of the off-vehicle charging box 100, the on-board charging device 200 detects the standard control guidance signal (CP signal) through the signal channel passing through the slip ring 300, and then triggers the first charging mode; subsequently, the on-board charging device 200 transmits the first feedback signal back to the off-vehicle charging box 100 through the same key rotating connection structure of the slip ring 300, driving its internal electronic lock to perform locking and finally triggering the target charging device to output three-phase AC power.
[0024] The reliable signal path established by the slip ring 300 enables automatic identification and initiation of the European standard charging process without manual intervention. The distributed layout of the off-vehicle charging box 100 and the on-board charging device 200 ensures both physical isolation between the charging system and the operation of the entire vehicle, and ensures the safety and standardization of the charging process through structured signal interaction. The overall structure provides a highly efficient charging solution for crawler cranes that can meet standard charging protocols while maintaining the continuity of the entire machine's operation.
[0025] As an optional solution of this utility model, the system further includes: The off-vehicle charging box 100 is used to transmit three-phase AC power to the on-board charging device 200 through the slip ring 300. The on-board charging device 200 is used to receive three-phase AC power, convert the three-phase AC power into DC power according to the first charging parameters corresponding to the first charging mode, and transmit the DC power to the energy storage device.
[0026] Specifically, the off-vehicle charging box 100 serves as the input port for three-phase AC power, transmitting the three-phase AC power from the external charging device to the on-board charging device 200 located on the upper part of the rotating platform via a specially designed slip ring 300, a key rotating conductive structure. After receiving this AC power, the on-board charging device 200's internal power conversion module, according to the charging parameters corresponding to the first charging mode (European standard charging), converts the three-phase AC power into DC power suitable for energy storage via a rectifier circuit, and finally delivers it to the energy storage device. Additionally, a heat dissipation structure can be added inside the on-board charging device 200 to ensure thermal stability during high-power conversion.
[0027] The special structure of the electric slip ring 300 enables reliable power transmission from the lower vehicle to the upper vehicle, ensuring that the crane can still rotate freely while charging. The distributed layout of the lower vehicle charging box and the on-board charging device forms a clear energy conversion path, enabling standard AC power to be efficiently and safely converted into DC power required by the energy storage device. The overall structure not only meets the requirements of European standard charging, but also provides a reliable hardware foundation for achieving safe and stable high-power charging.
[0028] As an optional solution of this utility model, the system further includes: The on-board charging device 200 is used to send a second feedback signal to the off-board charging box 100 via an electric slip ring 300 if no control guidance signal is detected. The off-vehicle charging box 100 is used to receive the second feedback signal, monitor the user input signal, generate a charging start command based on the user input signal, and send the charging start command to the on-board charging device 200 through the electric slip ring 300. The on-board charging device 200 is used to receive a charging start command, start a second charging mode based on the charging start command, and send the charging start command to the off-board charging box 100 through the electric slip ring 300. The off-vehicle charging box 100 is used to receive charging start commands and trigger the target charging device to output three-phase AC power using the charging start commands.
[0029] Specifically, when the on-board charging device 200 does not detect a control guidance signal, it sends a second feedback signal to the off-board charging box 100 via the slip ring 300. Upon receiving this signal, the off-board charging box 100 uses its integrated physical interfaces, such as the charging current selection button and the charging start button, to monitor user input, generate a charging start command, and transmit it back to the on-board charging device 200 via the slip ring 300. The on-board charging device 200 then initiates a second charging mode and confirms the start command again via the slip ring 300. Finally, the off-board charging box 100 uses this command to trigger the target charging device to output three-phase AC power. Based on this structure, a local controller can also be added inside the off-board charging box 100 to handle user input and signal conversion.
[0030] As an optional solution of this utility model, the system further includes: The off-vehicle charging box 100 is used to transmit three-phase AC power to the on-board charging device 200 through the slip ring 300. The on-board charging device 200 is used to receive three-phase AC power, convert the three-phase AC power into DC power according to the second charging parameters corresponding to the charging start command, and transmit the DC power to the energy storage device.
[0031] Specifically, the off-vehicle charging box 100 serves as the physical interface for industrial power distribution, transmitting the incoming three-phase AC power through a key rotating conductive structure, the slip ring 300, to the on-board charging device 200 located on the upper part of the rotating platform. Based on the second charging parameters (such as the user-selected charging current) corresponding to the charging start command received previously via the slip ring, the on-board charging device 200 converts the three-phase AC power into DC power suitable for energy storage via its internal power conversion module, and finally delivers it to the energy storage device to complete the charging process. Additionally, heat dissipation structures such as heat sinks or fans can be enhanced inside the on-board charging device 200 to ensure thermal stability during prolonged high-power conversion.
[0032] The special conductive structure of the slip ring 300 enables reliable power transmission from the fixed lower part to the rotating upper part, ensuring that the crane can still perform slewing operations during industrial charging. The distributed layout of the lower charging box and the on-board charging device forms a clear energy management path, enabling non-standard industrial AC power to be safely and efficiently converted into DC power required by the energy storage device according to the parameters set by the user. The overall structure not only meets the high power requirements of industrial charging, but also ensures the reliability of the charging process and the continuity of the whole machine operation through the structured energy transmission path.
[0033] As an optional solution of this utility model, the system further includes: The off-vehicle charging box 100 is used to detect the connection signal from the charging device and send the connection signal to the on-board charging device 200 through the slip ring 300. The on-board charging device 200 is used to receive connection signals and send locking commands to the off-vehicle charging box 100 via the slip ring 300. The off-vehicle charging box 100 is used to receive locking commands, control the electronic lock in the off-vehicle charging box 100 to perform locking operations according to the locking commands, and send the locking status of the electronic lock to the on-board charging device 200 through the electric slip ring 300. The on-board charging device 200 is used to receive the locking status of the electronic lock and determine that the charging device corresponding to the connection signal is the target charging device in the connection state.
[0034] Specifically, the off-vehicle charging box 100 detects physical connection signals (such as PP signals) from external charging devices through its integrated charging interface. This signal is then transmitted to the on-board charging device 200 via a key rotating connection structure called the slip ring 300. Upon receiving the connection signal, the on-board charging device 200 sends an electronic lock command to the off-vehicle charging box 100 through the same slip ring channel. The controller within the off-vehicle charging box 100 receives the command, drives its mechanical electronic lock to perform the locking operation, and sends a lock status confirmation signal back to the on-board charging device 200 via the slip ring 300, thus completing the closed-loop confirmation of the entire charging connection's physical state. Additionally, position detection switches can be added around the electronic lock mechanism to provide more precise lock status feedback.
[0035] As an optional solution of this utility model, such as Figure 2 As shown, the system also includes an energy storage device, wherein the energy storage device is connected to the on-board charging device 200; Energy storage device for outputting DC power to on-board charging device 200; The on-board charging device 200 is used to invert DC power into three-phase AC power and transmit the three-phase AC power to the off-board charging box 100. The off-board charging box 100 is used to transmit three-phase AC power to the target charging device.
[0036] Specifically, the energy storage device outputs direct current (DC) to the on-board charging device 200. The on-board charging device 200 converts the DC to three-phase alternating current (AC) through its internal inverter circuit. Then, the electrical energy is transferred to the off-board charging box 100 via a key rotating conductive structure called the slip ring 300. Finally, the energy is output to external electrical devices through the charging interface of the off-board charging box 100. Additionally, an output control switch and status indicator can be added to the off-board charging box to enhance the controllability and visibility of external power supply.
[0037] As an optional solution of this utility model, such as Figure 3 As shown, the system also includes: a circuit breaker box, which is located between the off-vehicle charging box 100 and the slip ring 300, and is used to provide fault protection for the three-phase line between the circuit breaker box and the on-board charging device 200.
[0038] Specifically, the circuit breaker box integrates physical protection devices such as air switches and residual current devices (RCDs). When a short circuit or leakage fault occurs in the three-phase line, the air switch will quickly cut off the circuit through the electromagnetic tripping mechanism. At the same time, the RCD will trigger a mechanical tripping mechanism after detecting current imbalance, thereby physically interrupting power transmission and preventing the fault from escalating. In addition, overvoltage protectors and arc fault detectors can be added to the circuit breaker box to provide electrical fault protection; status indicator windows and manual test buttons can also be added to facilitate daily maintenance and status monitoring.
[0039] As an independent physical protection unit, the circuit breaker box provides reliable dual protection against short circuits and leakage current for the charging circuit, effectively ensuring the safe operation of the system. Its modular design facilitates installation and maintenance, and its coordinated operation with the off-vehicle charging box and slip rings forms a detection-protection-execution safety chain. This structure not only meets the safety requirements of high-power charging, but also provides a foundation for electrical safety protection of the charging system.
[0040] As an optional solution of this utility model, the off-vehicle charging box 100 further includes: a temperature sensor, used to monitor the temperature signal of the target charging device, and transmit the temperature signal to the on-board charging device 200 through the slip ring 300, so that the on-board charging device 200 performs corresponding control operations according to the temperature signal.
[0041] Specifically, temperature sensors are physically positioned near the charging dock or key electrical connection points to directly monitor the real-time temperature of the charging equipment. The collected temperature signals are transmitted to the on-board charging device 200 via a rotating connection structure called an electric slip ring 300. The on-board charging device 200 analyzes and judges the received temperature signals. When the temperature exceeds a preset safety threshold, it immediately executes corresponding control operations, such as reducing the charging power or cutting off the charging circuit. Based on this basic structure, multiple temperature sensors can be added inside the charging box to achieve distributed monitoring of different heat points. Alternatively, thermally conductive silicone or metal heat-conducting sheets can be added around the sensors to improve the accuracy and response speed of temperature detection, and to enhance the high-temperature resistance and shielding protection of the connection cables between the sensors and the controller.
[0042] The tight physical integration of the temperature sensor and the charging interface enables real-time monitoring of the temperature of key components during the charging process; the stable signal transmission channel established by the slip ring ensures reliable transmission of temperature data from the vehicle to the vehicle platform; this structure forms a closed loop of temperature protection consisting of detection, transmission, judgment, and execution, which prevents charging safety accidents caused by overheating from a physical perspective.
[0043] As an optional solution of this utility model, the off-vehicle charging box 100 further includes: an interactive component for monitoring user input signals; if the user input signal is a start signal, the component parses the second charging parameter in the user input signal and generates a charging start command using the second charging parameter; or, if the user input signal is a stop signal, the component converts the stop signal into a charging termination command.
[0044] Specifically, the interactive component receives input signals from user operations via physical buttons and switches. When a start signal is detected, its internal controller analyzes the second charging parameters (such as charging current value) set by the user through the knob or button and converts these parameters into specific charging start commands. When a stop signal is detected, the circuit directly converts this stop signal into a charging termination command, achieving real-time control of the charging process. Based on this structure, a waterproof and dustproof housing can be added around the interactive component to improve reliability under harsh conditions; status indicator lights and a digital display unit can also be added to provide clear visual feedback on charging parameters; and an emergency stop button can be integrated as an independent hardware circuit to ensure rapid power cut-off in emergencies.
[0045] The interactive components provide users with an intuitive and reliable industrial charging control method through a physical operation interface, making up for the lack of automatic control functions in non-standard charging environments. The close integration of physical buttons and controller circuits ensures accurate response to operation commands and prevents misoperation through structured design. This structure allows users to flexibly set charging parameters according to actual conditions, improving adaptability and operational safety in industrial application scenarios.
[0046] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A charging system for a crawler crane, characterized in that, The system includes: an off-vehicle charging box and an on-board charging device, wherein the off-vehicle charging box and the on-board charging device are connected by an electric slip ring; The on-board charging device is used to detect whether there is a control guidance signal from the target charging device, obtain the detection result, start the corresponding charging mode according to the detection result, and send a feedback signal to the off-vehicle charging box through the slip ring. The off-vehicle charging box is used to receive feedback signals sent by the on-board charging device and to use the feedback signals to trigger the target charging device to output three-phase AC power.
2. The system according to claim 1, characterized in that, The system also includes: The on-board charging device is used to start a first charging mode based on the control guidance signal if the control guidance signal is detected, and to send a first feedback signal to the off-board charging box through the slip ring. The off-vehicle charging box is used to receive the first feedback signal and use the first feedback signal to trigger the target charging device to output three-phase AC power.
3. The system according to claim 2, characterized in that, The system also includes: The off-vehicle charging box is used to transmit the three-phase AC power to the on-board charging device through the slip ring; The on-board charging device is used to receive the three-phase AC power and convert the three-phase AC power into DC power according to the first charging parameters corresponding to the first charging mode, and output it to the energy storage device.
4. The system according to claim 1, characterized in that, The system also includes: The on-board charging device is used to send a second feedback signal to the off-vehicle charging box via the slip ring if the control guidance signal is not detected. The off-vehicle charging box is used to receive the second feedback signal, monitor the user input signal, generate a charging start command based on the user input signal, and send the charging start command to the on-board charging device through the electric slip ring. The on-board charging device is used to receive the charging start command, start the second charging mode based on the charging start command, and send the charging start command to the off-vehicle charging box through the electric slip ring; The off-vehicle charging box is used to receive the charging start command and use the charging start command to trigger the target charging device to output three-phase AC power.
5. The system according to claim 4, characterized in that, The system also includes: The off-vehicle charging box is used to transmit the three-phase AC power to the on-board charging device through the slip ring; The on-board charging device is used to receive the three-phase AC power, convert the three-phase AC power into DC power according to the second charging parameters corresponding to the charging start command, and transmit the DC power to the energy storage device.
6. The system according to claim 1, characterized in that, The system also includes: The off-vehicle charging box is used to detect connection signals from the charging device and send the connection signals to the on-board charging device via the slip ring. The on-board charging device is used to receive the connection signal and send a locking command to the off-vehicle charging box through the slip ring; The off-vehicle charging box is used to receive the locking command, control the electronic lock in the off-vehicle charging box to perform the locking operation according to the locking command, and send the locking status of the electronic lock to the on-board charging device through the slip ring. The on-board charging device is used to receive the locking status of the electronic lock and determine that the charging device corresponding to the connection signal is the target charging device in a connected state.
7. The system according to claim 1, characterized in that, The system further includes an energy storage device, wherein the energy storage device is connected to the on-board charging device; The energy storage device is used to output direct current to the on-board charging device; The on-board charging device is used to invert the DC power into three-phase AC power and transmit the three-phase AC power to the off-board charging box; The off-vehicle charging box is used to transmit the three-phase AC power to the target charging device.
8. The system according to claim 1, characterized in that, The system also includes: a circuit breaker box, disposed between the off-vehicle charging box and the slip ring, for providing fault protection for the three-phase line between the circuit breaker box and the on-board charging device.
9. The system according to claim 1, characterized in that, The off-vehicle charging box further includes a temperature sensor for monitoring the temperature signal of the target charging device and transmitting the temperature signal to the on-board charging device through the slip ring, so that the on-board charging device can perform corresponding control operations based on the temperature signal.
10. The system according to claim 1, characterized in that, The charging box after disembarking also includes an interactive component for monitoring user input signals. If the user input signal is a start signal, the component parses the second charging parameter in the user input signal and uses the second charging parameter to generate a charging start command. Alternatively, if the user input signal is a stop signal, the component converts the stop signal into a charging stop command.