Anti-interference charging system

Abstract

The utility model provides an anti-interference charging system, and belongs to the technical field of charging. The anti-interference charging system comprises a transformer module, a voltage detection module, a current detection module, a charging switching module and a control module. And a plurality of output ends of the transformer module are connected with a plurality of input ends of the charging switching module one by one. The control module is connected with the voltage detection module, the current detection module and the charging switching module. And the output end of the charging switching module is connected with load equipment. And the transformer module supplies power to load equipment through the charging switching module. The voltage detection module is configured to detect voltages of a plurality of output ends of the transformer module, and the current detection module is configured to detect currents of the plurality of output ends of the transformer module so as to judge whether each output end is occupied or not. And the charging switching module is configured to switch to the unoccupied output end for power supply when the voltage of the actual power supply output end of the transformer module is abnormal. The anti-interference capability of the charging system can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of charging technology, and in particular to an anti-interference charging system. Background Technology

[0002] New energy vehicles have once again become a hot topic. Currently, my country's new energy vehicle industry is showing a booming trend with strong supply and demand in both passenger and commercial applications. With the acceleration of urbanization and the development of the logistics industry, the demand for truck transportation is constantly increasing, and heavy-duty truck battery swapping can meet the needs of urban logistics transportation. At the same time, heavy-duty truck battery swapping has advantages such as long driving range and high operating efficiency, and has broad application prospects in urban logistics, construction transportation, and other fields.

[0003] With the technological development of battery swapping projects for new energy heavy-duty trucks, it is becoming increasingly common for 10kV charging and swapping equipment to charge multiple high-power battery packs simultaneously. However, there is a problem of mutual interference when charging multiple high-power battery packs using traditional 10kV step-down transformers. In particular, the secondary low-voltage winding of traditional transformers only has one output coil. When the insulation performance of each battery pack is tested in the charging system, since each battery pack shares the power supply of a single transformer low-voltage winding, the insulation resistance value detected is the resistance data of multiple parallel battery packs in the system. This leads to problems such as the system detecting low insulation resistance values, alarms, or displaying faults that prevent charging, thus affecting the overall system's operational quality and efficiency, and causing an increasing number of safety accidents.

[0004] If traditional solutions are used to address issues such as insulation testing of the charging system and mutual influence and interference between battery packs, the charging and swapping equipment would require multiple independent 10kV traditional step-down transformers and matching 10kV transformer outgoing line cabinets to control and protect the transformers. The existing 50-foot container size cannot meet the space requirements for the arrangement of multiple transformers and high-voltage cabinets, which would necessitate increasing the container size and investment. This would require a larger space at the site, and the addition of high-voltage cabinets, transformers, primary and secondary cables would significantly increase the cost of the charging and swapping equipment.

[0005] In summary, society urgently needs an anti-interference charging system that can effectively promote the battery swapping process for heavy-duty trucks. Utility Model Content

[0006] This disclosure provides an anti-interference charging system to improve the anti-interference capability of the charging system.

[0007] This disclosure provides an anti-interference charging system, including: a transformer module, a voltage detection module, a current detection module, a charging switching module, and a control module;

[0008] The transformer module includes multiple output terminals, each of which can be powered independently; the charging switching module includes multiple input terminals, and the multiple output terminals of the transformer module are connected to the multiple input terminals of the charging switching module one by one.

[0009] The control module is connected to the voltage detection module, the current detection module, and the charging switching module respectively; the output terminal of the charging switching module is used to connect to the load device.

[0010] The transformer module supplies power to the load device through the charging switching module;

[0011] The voltage detection module is configured to detect the voltage at multiple output terminals of the transformer module, and the current detection module is configured to detect the current at multiple output terminals of the transformer module to determine whether each output terminal is occupied; the charging switching module is configured to switch to an unoccupied output terminal for power supply when the voltage at the output terminal actually supplied by the transformer module is abnormal.

[0012] In one exemplary embodiment of this disclosure, the transformer module includes:

[0013] Multiple independent windings;

[0014] The multiple independent windings include a high-voltage primary winding and multiple low-voltage secondary windings, with each low-voltage secondary winding corresponding to an output terminal;

[0015] The high-voltage primary winding is disposed inside the plurality of low-voltage secondary windings, and the high-voltage primary winding is isolated from the plurality of low-voltage secondary windings, and the plurality of low-voltage secondary windings are isolated from each other.

[0016] In one exemplary embodiment of this disclosure, the voltage detection module includes:

[0017] Multiple voltage sensors;

[0018] A voltage sensor is installed at the output terminal of each low-voltage secondary winding in the transformer module.

[0019] All of the voltage sensors are connected to the control module.

[0020] In one exemplary embodiment of this disclosure, the current detection module includes:

[0021] Multiple current sensors;

[0022] A current sensor is installed at the output terminal of each low-voltage secondary winding in the transformer module.

[0023] All of the current sensors are connected to the control module.

[0024] In one exemplary embodiment of this disclosure, the anti-interference charging system further includes an anti-interference charging module, the anti-interference charging module comprising:

[0025] Optocoupler isolation unit and relay isolation unit;

[0026] The optocoupler isolation unit is connected to the relay isolation unit;

[0027] The relay isolation unit is used to connect the load device.

[0028] In one exemplary embodiment of this disclosure, the charging switching module includes:

[0029] Multiple relays; the multiple relays are connected to the output terminal of the transformer module;

[0030] A relay is connected to the output terminal of each low-voltage secondary winding in the transformer module.

[0031] In one exemplary embodiment of this disclosure, the anti-interference charging system further includes:

[0032] Voltage compensation module;

[0033] The voltage compensation module is connected to the output terminal of the charging switching module;

[0034] The voltage compensation module is also used to connect to the load device;

[0035] The voltage compensation module is configured to compensate the voltage output by the transformer module.

[0036] In one exemplary embodiment of this disclosure, the anti-interference charging system further includes:

[0037] Alarm module and indicator light module;

[0038] The alarm module is connected to the control module;

[0039] The indicator light module is connected to the current detection module;

[0040] The indicator light module is located at the output terminal of the transformer module, and the indicator light module is configured to indicate whether the output terminal of the transformer module is occupied.

[0041] The beneficial effects of the anti-interference charging system provided in this embodiment are as follows:

[0042] This embodiment exhibits high stability and anti-interference capabilities. Through real-time monitoring by voltage and current detection modules, the charging switching module can quickly switch the load device to the normal output power supply upon detecting an abnormal voltage, preventing equipment damage or charging interruption due to voltage anomalies and ensuring stable operation of the load device. The transformer module in this embodiment allows multiple outputs to be powered independently, effectively solving the problem of mutual interference between multiple transformer windings when multiple loads are powered simultaneously, thus improving the anti-interference capability of the charging system and making it applicable to a wide range of scenarios. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this disclosure, 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 disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of an anti-interference charging system provided in an embodiment of this disclosure;

[0045] Figure 2 This is a schematic diagram of another anti-interference charging system provided in this embodiment;

[0046] Figure 3 This is a schematic diagram of another anti-interference charging system provided in the embodiments of this disclosure. Detailed Implementation

[0047] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.

[0048] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.

[0049] The implementation of this disclosure will be described in detail below with reference to the specific accompanying drawings:

[0050] Figure 1 This is a schematic diagram of an anti-interference charging system provided in an embodiment of this disclosure. (Refer to...) Figure 1The anti-interference charging system includes: a transformer module, a voltage detection module, a current detection module, a charging switching module, and a control module.

[0051] The transformer module has multiple output terminals, each of which can be powered independently. The charging switching module has multiple input terminals, and the multiple output terminals of the transformer module are connected one by one to the multiple input terminals of the charging switching module.

[0052] The control module is connected to the voltage detection module, current detection module, and charging switching module, respectively. The output of the charging switching module is used to connect to the load device.

[0053] The transformer module supplies power to the load device through the charging switching module.

[0054] The voltage detection module is configured to detect the voltage at multiple output terminals of the transformer module, and the current detection module is configured to detect the current at multiple output terminals of the transformer module, in order to determine whether each output terminal is occupied. The charging switching module is configured to switch to an unoccupied output terminal for power supply when the voltage at the output terminal actually supplied by the transformer module is abnormal.

[0055] In this embodiment, the transformer module consists of multiple windings, capable of converting the input voltage into multiple supply voltages suitable for the load. The transformer module is used to connect to the input power supply and provides multiple independent power supplies to the load through its internal multi-winding structure. The voltage detection module may include a voltage sensor for real-time monitoring of the transformer output voltage, installed near the transformer output.

[0056] The current detection module may include a current sensor for real-time monitoring of the transformer output current to determine whether the output is occupied; it is installed near the transformer output. The charging switching module may include a relay to switch the power supply output to the load when the voltage is abnormal; it is positioned between the transformer and the load.

[0057] The control module includes a microcontroller, which receives voltage detection signals and current detection signals, and controls the switching state of the relays in the charging switching module according to the voltage detection signals and current detection signals to realize the switching of the power supply line.

[0058] For example, the transformer module may include three output terminals, outputting three voltage channels. After the anti-interference charging system is started, it supplies power to multiple load devices. The voltage detection module detects the voltage at each output terminal of the transformer module, and the current detection module detects the current at each output terminal of the transformer module. When the voltage detection module detects an abnormal voltage at one of the output terminals, and there is an unused output terminal of the transformer (i.e., the current at one output terminal is 0), the control module will control the relay of the charging switching module to operate, disconnecting the initially connected output terminal and connecting to the unused output terminal, thereby switching the power supply lines and ensuring continuous and stable charging of the load devices. If the current at the other two transformer output terminals is not 0, i.e., both are occupied, the initially connected output terminals will be disconnected, and an alarm will be issued.

[0059] As can be seen from the above, this embodiment possesses high stability and anti-interference capabilities. Through real-time monitoring by the voltage and current detection modules, once an abnormal voltage is detected, the charging switching module can quickly switch the load device to the normal output power supply, preventing equipment damage or charging interruption due to voltage anomalies and ensuring the stable operation of the load device. The multiple outputs of the transformer module in this embodiment can be independently powered, effectively solving the problem of mutual interference between multiple transformer windings when multiple loads are powered simultaneously, improving the anti-interference capability of the charging system, and making it applicable to a wide range of scenarios.

[0060] like Figure 2 As shown, in one embodiment of this disclosure, the transformer module includes:

[0061] Multiple independent windings.

[0062] Multiple independent windings include a high-voltage primary winding and multiple low-voltage secondary windings, with each low-voltage secondary winding corresponding to an output terminal.

[0063] The high-voltage primary winding is located inside multiple low-voltage secondary windings. The high-voltage primary winding is isolated from the multiple low-voltage secondary windings, and the multiple low-voltage secondary windings are also isolated from each other.

[0064] In this embodiment, multiple independent windings are made of copper foil and cast with epoxy resin. The high-voltage coil of the high-voltage primary winding adopts an upper and lower double-split structure. Multiple low-voltage secondary windings are arranged vertically. The output terminal of each low-voltage secondary winding includes 4 copper busbar terminals.

[0065] For example, charging six battery packs is performed. The transformer module includes a 10kV step-down low-voltage multi-winding isolation transformer. Based on the charging requirements of the six independent battery packs, the 10kV step-down low-voltage multi-winding isolation transformer has six independent low-voltage windings. The 10kV high-voltage primary winding is isolated from the 0.4kV low-voltage secondary winding, and the 0.4kV low-voltage secondary windings are also isolated from each other. This 10kV step-down low-voltage multi-winding isolation transformer can simultaneously meet the charging needs of up to six independent battery packs.

[0066] The 10kV step-down low-voltage multi-winding isolation transformer can adopt an axial six-split structure, with the output terminals arranged sequentially from top to bottom, which can minimize mutual interference between multiple windings during charging.

[0067] Due to the large output capacity, power, and current of the rechargeable battery pack, copper busbars can be used to lead out the six independent low-voltage windings of the 10kV step-down multi-winding isolation transformer. The transformer requires a large number of copper busbar terminals for each of the six low-voltage secondary windings, with four terminals (A, B, C, N) needed for each winding, totaling 24 terminals. Traditional transformers have the 10kV high-voltage primary winding on the outside and the 0.4kV low-voltage secondary winding on the inside; however, the requirement of 24 copper busbars for the low-voltage secondary winding is not feasible using traditional manufacturing processes.

[0068] Therefore, the 10kV step-down low-voltage multi-winding isolation transformer can be designed with the 10kV high-voltage coil (i.e., the high-voltage primary winding) inside and the 0.4kV low-voltage secondary winding outside, ensuring that the 24 copper busbars of the low-voltage secondary winding are exposed, and the 6 sets of low-voltage secondary windings are arranged vertically to avoid mutual interference between the external leads.

[0069] To balance electromagnetic distribution, the high-voltage coil of the high-voltage primary winding can adopt a double-split structure. When the number of external output lines of the transformer is small, the upper and lower double-split structure of the high-voltage primary winding can automatically and reasonably distribute the electromagnetic flux according to the external connection position of the output lines, thereby minimizing transformer leakage flux, ensuring transformer temperature distribution, reducing losses, and effectively improving the overall performance of the transformer.

[0070] The low-voltage secondary winding is made of copper foil and cast with epoxy resin, which reduces eddy current losses and increases short-circuit and overload resistance. Traditional multi-split structures often use wire winding and open structures, which are more sensitive to dust and ambient humidity, resulting in a higher failure rate. The transformer in this embodiment adopts a double-split structure, effectively avoiding the drawbacks of open structures, and the use of copper foil winding further reduces eddy current losses.

[0071] Transformers can be designed using a combination of high-permeability silicon steel sheets and 99.99% copper conductors. By reducing magnetic and electrical density, the overall reliability of the transformer is improved, while losses are reduced. The selection of high-permeability silicon steel can effectively reduce the transformer's no-load loss and noise level. Using 99.99% soft copper conductors can effectively reduce electrical density, reduce resistive losses, and improve the transformer's short-circuit withstand capability.

[0072] The isolation transformer also has step-up and step-down functions. Firstly, it can convert 10KV voltage into 400VAC, which, through the PCS bidirectional converter, adapts to the battery voltage platform to charge the power battery, thus replenishing its power. Secondly, under the condition of meeting power requirements, the battery pack can feed power back to the grid through an anti-interference charging system, requiring the battery pack to have a discharge function (converting 400VAC to 10KV voltage through the PCS bidirectional converter transformer).

[0073] As can be seen from the above, the output end (low-voltage secondary winding) and input end (high-voltage primary winding) of the transformer module in this embodiment are completely "open circuit". The transformer module has only magnetic connection in the circuit and no direct electrical connection, which can play an isolation role. After the isolation transformer with Y / Δ connection, it can prevent the transmission of some harmonics. When a single-phase grounding occurs on the load side of the transformer module, it will not cause a single-phase grounding problem in the entire system (the part above the transformer module). [1] When a short circuit accident occurs on the load side, the transformer module in this embodiment can limit the short circuit current of the system. There is no electrical connection between the primary (high-voltage primary winding) and the secondary (low-voltage secondary winding) of the transformer module in this embodiment. Neither of the two wires of the secondary is grounded. There is no potential difference between either wire of the secondary and the ground. Therefore, a person will not be electrocuted by touching either wire, which plays a safety protection role.

[0074] In one embodiment of this disclosure, the voltage detection module includes:

[0075] Multiple voltage sensors.

[0076] A voltage sensor is installed at the output terminal of each low-voltage secondary winding in the transformer module.

[0077] Multiple voltage sensors are connected to the control module.

[0078] In this embodiment, each voltage sensor corresponds to a low-voltage secondary winding output terminal, and the voltage signal at the output terminal is acquired in real time. These voltage signals are converted into electrical signals and transmitted to the control module. Upon receiving the electrical signals, the control module compares them with a preset reference voltage range using its internal logic comparison unit. If the detected voltage exceeds the reference voltage range, the control module determines that the output terminal voltage is abnormal and, based on this result, controls the charging switching module to perform the corresponding power supply switching operation.

[0079] This embodiment can monitor the output voltage of each low-voltage secondary winding of the transformer in real time and accurately. By comparing it with the preset range, it can quickly detect voltage anomalies. Once an anomaly occurs, the control module promptly controls the charging switching module to switch power supplies, ensuring the stable operation of the load equipment, avoiding damage to the equipment due to voltage anomalies, and improving the reliability and safety of the charging system.

[0080] In one embodiment of this disclosure, the current detection module includes:

[0081] Multiple current sensors.

[0082] A current sensor is installed at the output terminal of each low-voltage secondary winding in the transformer module.

[0083] Multiple current sensors are connected to the control module.

[0084] In this embodiment, each current sensor is installed at the output terminal of a low-voltage secondary winding of the transformer module. During operation, the current sensor monitors the current at the corresponding output terminal in real time and transmits the current signal to the control module. The control module determines whether current flows through the output terminal based on the received electrical signal, thereby determining whether the output terminal is occupied. When the output terminal current is zero, it indicates that this output terminal is not connected to a load device. If there is a certain amount of current, it indicates that the output terminal is connected to a load device and is in a working state.

[0085] For example, when the voltage value at one of the output terminals of a transformer module is abnormal and a power supply switch is required, the control module can control the current detection module to detect the current at multiple output terminals of the remaining transformer modules and find an unoccupied output terminal to switch the power supply line. If all other output terminals are occupied, the original power supply output terminal is disconnected to prevent damage to the equipment caused by undervoltage or overvoltage power supply.

[0086] The current detection module in this embodiment can monitor the current at each output terminal in real time and accurately determine its occupancy status. When the voltage is abnormal and a power supply switch is required, it can assist the control module in quickly finding an available output terminal to ensure stable power supply. If no switchable output terminal is available, the original power supply is disconnected in time to avoid damage to the equipment due to undervoltage or overvoltage, effectively improving the reliability and safety of the charging system.

[0087] like Figure 2 As shown, in one embodiment of this disclosure, the anti-interference charging system further includes an anti-interference charging module, which includes:

[0088] Optocoupler isolation unit and relay isolation unit;

[0089] The optocoupler isolation unit is connected to the relay isolation unit;

[0090] Relay isolation units are used to connect load devices.

[0091] In this embodiment, the optocoupler isolation unit consists of a transformer module whose output voltage is connected to the anode of the LED on the input side of the optocoupler (e.g., PC817) via a current-limiting resistor R1, while the cathode of the LED is grounded. When a voltage signal is input, the LED emits light, turning on the phototransistor on the output side of the optocoupler. The collector of the phototransistor is connected to the power supply Vcc (e.g., 5V) via a pull-up resistor R2, and the emitter outputs a signal.

[0092] Relay isolation unit: The signal output from the optocoupler is connected to the base of transistor Q1. The emitter of transistor Q1 is grounded, and the collector is connected to one end of the relay coil. The other end of the coil is connected to the power supply Vcc. When the optocoupler output signal turns on transistor Q1, the relay coil is energized, the relay contacts close, and the isolated power supply is connected to the load device. Simultaneously, to prevent the back electromotive force generated when the relay coil is de-energized from damaging transistor Q1, a freewheeling diode D1 can be connected in parallel across the coil.

[0093] This embodiment can use optocouplers to achieve electrical isolation of signals and relays to achieve power transmission isolation, effectively isolating interference between load devices and the charging system and improving the performance of the entire anti-interference charging module.

[0094] In one embodiment of this disclosure, the charging switching module includes:

[0095] Multiple relays. These relays are connected to the output terminals of the transformer module.

[0096] A relay is connected to the output terminal of each low-voltage secondary winding in the transformer module.

[0097] In this embodiment, each relay has two states: closed and open. When closed, the corresponding output terminal is connected to the load device to provide power; when open, the connection between the output terminal and the load device is disconnected.

[0098] For example, the control module determines the operating status of each output terminal based on information provided by the voltage detection module and the current detection module. When an abnormal voltage is detected at a power-supplying output terminal and there is an unused output terminal, the control module sends a control signal to control the corresponding relay to operate, opening the relay corresponding to the abnormal output terminal and closing the relay corresponding to the unused output terminal, thereby completing the switching of the power supply line.

[0099] For example, the charging switching module also includes a transistor-based relay drive circuit: when the control module outputs a high level, the transistor conducts, the relay coil is energized, the contacts close, and the output terminal of the transformer module is connected to the load; when the control module outputs a low level, the transistor is cut off, the relay coil is de-energized, and the contacts open. A freewheeling diode can be placed between the transistor and the relay to prevent the back electromotive force generated when the relay coil is de-energized from damaging the transistor.

[0100] This embodiment utilizes relays to achieve flexible switching of power supply lines. When an abnormal output voltage is detected, it can quickly switch to the normal output, ensuring continuous and stable charging of the load equipment. The transistor-based drive circuit, in conjunction with a freewheeling diode, ensures reliable relay operation and effectively protects circuit components, improving the reliability and stability of the charging system.

[0101] like Figure 3 As shown, in one embodiment of this disclosure, the anti-interference charging system further includes:

[0102] Voltage compensation module.

[0103] The voltage compensation module is connected to the output of the charging switching module.

[0104] The voltage compensation module is also used to connect to load devices.

[0105] The voltage compensation module is configured to compensate for the voltage output by the transformer module.

[0106] In this embodiment, when the voltage output by the transformer module deviates due to various reasons such as load changes and power grid fluctuations, the voltage compensation module will detect this deviation and generate a compensation voltage through its internal circuit mechanism. This compensation voltage will be added to or subtracted from the transformer output voltage, thereby restoring the voltage finally output to the load device to a stable value.

[0107] For example, the voltage compensation module can be a linear voltage regulator circuit, which includes a filter capacitor, an error amplifier, a regulating transistor, and a sampling resistor network. The linear voltage regulator circuit samples the transformer output voltage Vin by dividing it using the sampling resistor network composed of sampling resistors R1 and R2, obtaining a sampled voltage Vs proportional to the output voltage. The sampled voltage Vs is then fed to one input of the error amplifier.

[0108] The other input of the error amplifier is connected to a voltage reference source Vref. The error amplifier compares the sampled voltage Vs with the voltage reference source Vref to obtain an error signal. If the sampled voltage Vs is higher than Vref, it indicates that the output voltage is too high; conversely, it indicates that the output voltage is too low.

[0109] The error amplifier amplifies the error signal and outputs a control signal to drive the regulating transistor Q. When the output voltage is too high, the control signal output by the error amplifier reduces the conduction level of the regulating transistor Q, thereby lowering the output voltage; when the output voltage is too low, the control signal increases the conduction level of the regulating transistor Q, thereby raising the output voltage.

[0110] A filter capacitor C is connected to the output terminal of the transformer module to smooth the output voltage and reduce voltage fluctuations and ripple.

[0111] The voltage compensation module in this embodiment can monitor the changes in the transformer output voltage in real time and perform corresponding compensation to ensure that the voltage supplied to the load device is stable and reliable, and improve the anti-interference capability of the charging circuit.

[0112] like Figure 2 As shown, in one embodiment of this disclosure, the anti-interference charging system further includes:

[0113] Alarm module and indicator light module.

[0114] The alarm module is connected to the control module.

[0115] The indicator light module is connected to the current detection module.

[0116] The indicator light module is located at the output end of the transformer module and is configured to indicate whether the output end of the transformer module is occupied.

[0117] In this embodiment, the alarm module may include a sound-generating device (such as a buzzer) and a light-emitting device (such as a light-emitting diode, LED). The control module determines whether an abnormality has occurred in the system based on data fed back from the voltage detection module, current detection module, etc. When an abnormality is detected (such as abnormal output voltage, excessive current, etc.), the control module sends a trigger signal to the alarm module, causing the buzzer to sound and the LED to light up, thereby realizing an audible and visual alarm.

[0118] The indicator module can consist of multiple light-emitting diodes (LEDs) and current-limiting resistors, with each LED corresponding to one output terminal of the transformer module. The current-limiting resistors limit the current flowing through the LEDs to prevent damage due to excessive current. The indicator module can be placed near the output terminals of the transformer module, allowing operators to visually observe the status of each output terminal.

[0119] For example, the current detection module monitors the current at each output terminal of the transformer module in real time. When current flows through a certain output terminal, it indicates that the output terminal is occupied by the load device, and the current detection module sends a signal to the corresponding indicator light to make the indicator light light up; when no current flows through the output terminal, the indicator light goes out, thus indicating whether the output terminal is occupied.

[0120] In this embodiment, the alarm module provides audible and visual alarms via a buzzer and LEDs when abnormal output voltage or excessive current occurs, allowing operators to promptly detect and address the issue, preventing the fault from escalating. The indicator light module is located near the transformer output terminals, using LEDs to visually display the occupancy status of each output terminal, facilitating efficient scheduling of equipment charging and improving the management efficiency and reliability of the charging system.

[0121] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. An interference-resistant charging system, characterized by, include: Transformer module, voltage detection module, current detection module, charging switching module, and control module; The transformer module includes multiple output terminals, each of which can be powered independently. The charging switching module includes multiple input terminals, and the multiple output terminals of the transformer module are connected to the multiple input terminals of the charging switching module one by one. The control module is connected to the voltage detection module, the current detection module, and the charging switching module respectively; the output terminal of the charging switching module is used to connect to the load device. The transformer module supplies power to the load device through the charging switching module; The voltage detection module is configured to detect the voltage at multiple output terminals of the transformer module, and the current detection module is configured to detect the current at multiple output terminals of the transformer module to determine whether each output terminal is occupied; the charging switching module is configured to switch to an unoccupied output terminal for power supply when the voltage at the output terminal actually supplied by the transformer module is abnormal.

2. The interference-resistant charging system of claim 1, wherein, The transformer module includes: Multiple independent windings; The multiple independent windings include a high-voltage primary winding and multiple low-voltage secondary windings, with each low-voltage secondary winding corresponding to an output terminal; The high-voltage primary winding is disposed inside the plurality of low-voltage secondary windings, and the high-voltage primary winding is isolated from the plurality of low-voltage secondary windings, and the plurality of low-voltage secondary windings are isolated from each other.

3. The interference-immune charging system of claim 2, wherein, The voltage detection module includes: Multiple voltage sensors; A voltage sensor is installed at the output terminal of each low-voltage secondary winding in the transformer module. All of the voltage sensors are connected to the control module.

4. The interference-resistant charging system of claim 2, wherein, The current detection module includes: Multiple current sensors; A current sensor is installed at the output terminal of each low-voltage secondary winding in the transformer module. All of the current sensors are connected to the control module.

5. The interference-resistant charging system of claim 1, wherein, It also includes an anti-interference charging module, which includes: Optocoupler isolation unit and relay isolation unit; The optocoupler isolation unit is connected to the relay isolation unit; The relay isolation unit is used to connect the load device.

6. The tamper-resistant charging system of claim 2, wherein, The charging switching module includes: Multiple relays; the multiple relays are connected to the output terminal of the transformer module; A relay is connected to the output terminal of each low-voltage secondary winding in the transformer module.

7. The interference-resistant charging system of claim 1, wherein, Also includes: Voltage compensation module; The voltage compensation module is connected to the output terminal of the charging switching module; The voltage compensation module is also used to connect to the load device; The voltage compensation module is configured to compensate the voltage output by the transformer module.

8. The interference-resistant charging system of claim 1, wherein, Also includes: Alarm module and indicator light module; The alarm module is connected to the control module; The indicator light module is connected to the current detection module; The indicator light module is located at the output terminal of the transformer module, and the indicator light module is configured to indicate whether the output terminal of the transformer module is occupied.

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