Standby zero-power-loss circuit of charging pile module
By designing a standby zero-power-loss circuit for the charging pile module and utilizing the linkage control of the charging detection module and the control module, the problem of reactive power loss in the standby state of the charging module is solved, thus realizing a charging pile system with zero power loss and low cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICON CHAT UNION ELECTRIC CO LTD
- Filing Date
- 2025-03-25
- Publication Date
- 2026-04-21
AI Technical Summary
The charging module suffers from reactive power loss in standby mode, especially due to the presence of inductors and capacitors in the input filter circuit, which increases the charging cost.
A standby zero-power-loss circuit for a charging pile module was designed, including a charging detection module, a first charging control module, a voltage correction module, an auxiliary power supply module, and a control module. By accurately detecting the connection status between the charging gun head and the charging port of the electric vehicle, the control module is linked to disconnect the connection between the power grid and the voltage correction module, thereby achieving zero power loss.
It achieves zero power loss in the standby state of the charging pile, reduces the energy consumption and cost of the charging system, and ensures the stability and safety of charging.
Smart Images
Figure CN224154009U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of charging technology, and in particular to a standby zero-power-loss circuit for a charging pile module. Background Technology
[0002] With the rapid development of new energy vehicles, the demand for charging piles is expanding rapidly. Given the cost of charging, the standby power loss of charging piles when not in use is receiving increasing attention. Because charging modules must meet EMC requirements, they are equipped with input filtering circuits, which include inductors and capacitors, increasing the reactive power loss of the charging module during standby. Utility Model Content
[0003] This disclosure provides a standby zero-power loss circuit for a charging pile module to reduce reactive power loss when the charging module is in standby mode.
[0004] This disclosure provides a standby zero-power-loss circuit for a charging pile module, including:
[0005] The system includes a charging detection module, a first charging control module, a voltage correction module, an auxiliary power supply module, and a control module.
[0006] The input terminal of the first charging control module is used to connect to the power grid, the output terminal of the first charging control module is connected to the input terminal of the voltage correction module, and the output terminal of the voltage correction module is used to output the charging voltage.
[0007] The input terminal of the auxiliary power module is connected to the output terminal of the voltage correction module, the first output terminal of the auxiliary power module is connected to the power terminals of the charging detection module and the first charging control module respectively, and the second output terminal of the auxiliary power module is connected to the power terminal of the control module.
[0008] The output terminal of the charging detection module is connected to the control terminal of the first charging control module, and the control terminal of the first charging control module is connected to the first output terminal of the control module.
[0009] The charging detection module is configured to detect whether the charging gun head is connected to the charging port of the electric vehicle.
[0010] In one exemplary embodiment of this disclosure, the first charging control module includes: a transistor Q1, a relay K1, and a relay K2;
[0011] The base of transistor Q1 is connected to the first output terminal of the control module, the emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to the first power supply terminals of relay K1 and relay K2 respectively, and the second power supply terminals of relay K1 and relay K2 are both connected to the first output terminal of the auxiliary power supply module.
[0012] The first terminal of relay K1 is used to connect to phase A power, the second terminal of relay K1 is connected to the first input terminal of the voltage correction module, the first terminal of relay K2 is used to connect to phase B power, the second terminal of relay K2 is connected to the second input terminal of the voltage correction module, and the third input terminal of the voltage correction module is used to connect to phase C power.
[0013] The first output terminal of the voltage correction module serves as the positive bus, the second output terminal of the voltage correction module serves as the neutral line, and the third output terminal of the voltage correction module serves as the negative bus.
[0014] In one exemplary embodiment of this disclosure, the first charging control module further includes: an optocoupler U1;
[0015] The first input terminal of the optocoupler U1 is connected to the first output terminal of the control module, the second input terminal of the optocoupler U1 is grounded, the first output terminal of the optocoupler U1 is connected to the first output terminal of the auxiliary power supply module, and the second output terminal of the optocoupler U1 is connected to the base of the transistor Q1.
[0016] In one exemplary embodiment of this disclosure, the charging detection module includes: a diode D3, a capacitor C1, a contact switch KEY1, a resistor R5, and a transistor Q3;
[0017] The anode of diode D3 is connected to the first output terminal of the auxiliary power module, the cathode of diode D3 is connected to the positive terminal of capacitor C1, the negative terminal of capacitor C1 is grounded, the positive terminal of capacitor C1 is connected to the first terminal of resistor R5 through contact switch KEY1, the first terminal of resistor R5 is connected to the collector of transistor Q3, the second terminal of resistor R5 is connected to the base of transistor Q3, and the emitter of transistor Q3 is connected to the base of transistor Q1.
[0018] In one exemplary embodiment of this disclosure, the charging detection module further includes: a capacitor C2 and a resistor R3;
[0019] The first terminal of capacitor C2 is connected to the emitter of transistor Q3, the second terminal of capacitor C2 is grounded, and resistor R3 is connected in parallel with capacitor C2.
[0020] In one exemplary embodiment of this disclosure, it further includes: a second charging control module;
[0021] The input terminal of the second charging control module is used to connect to the power grid, the output terminal of the second charging control module is connected to the input terminal of the voltage correction module, the power supply terminal of the second charging control module is connected to the first output terminal of the auxiliary power supply module, and the control terminal of the second charging control module is connected to the second output terminal of the control module.
[0022] In one exemplary embodiment of this disclosure, the second charging control module includes: transistor Q2, relay K3, relay K4, resistor R1, and resistor R2;
[0023] The base of transistor Q2 is connected to the second output terminal of the control module, the emitter of transistor Q2 is grounded, the collector of transistor Q2 is connected to the first power supply terminals of relay K3 and relay K4 respectively, and the second power supply terminals of relay K3 and relay K4 are connected to the first output terminal of the auxiliary power supply module.
[0024] The first terminal of relay K3 is used to connect to phase A power, and the second terminal of relay K3 is connected to the first input terminal of the voltage correction module through resistor R1. The first terminal of relay K4 is used to connect to phase B power, and the second terminal of relay K4 is connected to the second input terminal of the voltage correction module through resistor R2. The third input terminal of the voltage correction module is used to connect to phase C power.
[0025] The first output terminal of the voltage correction module serves as the positive bus, the second output terminal of the voltage correction module serves as the neutral line, and the third output terminal of the voltage correction module serves as the negative bus.
[0026] In one exemplary embodiment of this disclosure, the second charging control module further includes: an optocoupler U2;
[0027] The first input terminal of the optocoupler U2 is connected to the second output terminal of the control module, the second input terminal of the optocoupler U2 is grounded, the first output terminal of the optocoupler U2 is connected to the first output terminal of the auxiliary power supply module, and the second output terminal of the optocoupler U2 is connected to the base of the transistor Q2.
[0028] The beneficial effects of the standby zero-power-loss circuit for a charging pile module provided in this embodiment are as follows: The charging detection module of this embodiment can accurately detect the connection status between the charging gun and the charging port of the electric vehicle. The first charging control module and the voltage correction module work together to convert the AC power from the power grid into a suitable charging voltage, ensuring the stability and safety of charging. The auxiliary power supply module provides suitable operating power to each module to ensure the normal operation of the system. When the electric vehicle is fully charged, the control module can promptly control the first charging control module to stop working, disconnect the connection between the power grid and the voltage correction module, and put the charging pile into standby mode, achieving zero power loss. Moreover, there is no need to increase the power input contactor, effectively reducing the cost of the charging pile system. Attached Figure Description
[0029] 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.
[0030] Figure 1 This is a schematic diagram of the standby zero-power loss circuit of a charging pile module provided in an embodiment of this disclosure;
[0031] Figure 2 This is a schematic diagram of the standby zero-power-loss circuit of a charging pile module provided in an embodiment of this disclosure. Detailed Implementation
[0032] 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.
[0033] 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.
[0034] The implementation of this disclosure will be described in detail below with reference to the specific accompanying drawings:
[0035] Figure 1This is a schematic diagram of a standby zero-power-loss circuit for a charging pile module provided in an embodiment of this disclosure. (Refer to...) Figure 1 The standby zero-power-loss circuit of this charging pile module includes:
[0036] The system includes a charging detection module, a first charging control module, a voltage correction module, an auxiliary power supply module, and a control module.
[0037] The input terminal of the first charging control module is used to connect to the power grid, and the output terminal of the first charging control module is connected to the input terminal of the voltage correction module. The output terminal of the voltage correction module is used to output the charging voltage.
[0038] The input terminal of the auxiliary power module is connected to the output terminal of the voltage correction module. The first output terminal of the auxiliary power module is connected to the power terminals of the charging detection module and the first charging control module, respectively. The second output terminal of the auxiliary power module is connected to the power terminal of the control module.
[0039] The output terminal of the charging detection module is connected to the control terminal of the first charging control module, and the control terminal of the first charging control module is connected to the first output terminal of the control module.
[0040] The charging detection module is configured to detect whether the charging gun head is connected to the charging port of the electric vehicle.
[0041] In this embodiment, the charging detection module is equipped with an energy storage element (such as a battery or energy storage capacitor) to power itself using the electrical energy stored in the energy storage element. The charging detection module can detect in real time whether the charging gun is connected to the electric vehicle's charging port. When the charging gun is successfully connected to the electric vehicle's charging port, the charging detection module can detect the corresponding connection status change and thus output a control signal to the control terminal of the first charging control module.
[0042] The first charging control module receives AC power from the power grid. Initially, it waits for a control signal from the charging detection module. Upon receiving the control signal from the charging detection module, the first charging control module is activated, allowing AC power from the grid to enter from its input terminal, exit from its output terminal, and be sent to the input terminal of the voltage correction module, thereby initiating the charging preparation process for the electric vehicle.
[0043] The voltage correction module can consist of a filter circuit, a power factor correction circuit, etc. It receives AC power from the first charging control module, processes the input voltage through the filter circuit and the power factor correction circuit, corrects it to a voltage suitable for charging electric vehicles, and outputs this charging voltage from the output terminal to provide a stable and suitable charging power supply for electric vehicles.
[0044] The auxiliary power supply module is used to acquire the voltage after voltage correction. It can perform step-down and filtering processes on the input voltage, converting it into a DC voltage signal suitable for the operation of the control module, the first charging control module, and the charging detection module. The first output terminal of the auxiliary power supply module is connected to the power supply terminals of the charging detection module and the first charging control module, respectively, providing the DC power required for the operation of these two modules; the second output terminal is connected to the power supply terminal of the control module, providing power to the control module and ensuring that all modules can operate normally and stably.
[0045] When the auxiliary power module supplies power to the control module, the control module begins operation. Its first output terminal sends a control signal to the control terminal of the first charging control module. At this time, the charging detection module stops working, while the first charging control module remains operational, continuing to charge the electric vehicle. When the electric vehicle is fully charged, the control module outputs a corresponding control signal to the control terminal of the first charging control module, causing the first charging control module to stop working. This, in turn, disconnects the connection between the power grid and the voltage correction module, stopping the entire charging station. At this point, there are no internal conductive loops within the charging station; only external AC power is supplied. The module enters standby mode, achieving zero power loss during standby.
[0046] As can be seen from the above, the charging detection module in this embodiment can accurately detect the connection between the charging gun and the electric vehicle's charging port. The first charging control module and the voltage correction module work together to convert the AC power from the grid into a suitable charging voltage, ensuring the stability and safety of charging. The auxiliary power supply module provides suitable operating power to each module, ensuring the normal operation of the system. When the electric vehicle is fully charged, the control module can promptly control the first charging control module to stop working, disconnecting the grid from the voltage correction module, putting the charging pile into standby mode and achieving zero power loss. Moreover, there is no need to increase the power input contactor, effectively reducing the cost of the charging pile system.
[0047] like Figure 2 As shown, in one embodiment of this disclosure, the first charging control module includes: transistor Q1, relay K1, and relay K2;
[0048] The base of transistor Q1 is connected to the first output terminal of the control module, the emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to the first power supply terminals of relays K1 and K2 respectively, and the second power supply terminals of relays K1 and K2 are both connected to the first output terminal of the auxiliary power supply module.
[0049] The first terminal of relay K1 is used to connect to phase A power, the second terminal of relay K1 is connected to the first input terminal of the voltage correction module, the first terminal of relay K2 is used to connect to phase B power, the second terminal of relay K2 is connected to the second input terminal of the voltage correction module, and the third input terminal of the voltage correction module is used to connect to phase C power.
[0050] The first output terminal of the voltage correction module serves as the positive bus, the second output terminal serves as the neutral line, and the third output terminal serves as the negative bus.
[0051] In this embodiment, when the charging gun head is successfully connected to the charging port of the electric vehicle, the charging detection module outputs a high level to the base of transistor Q1, turning on transistor Q1. At this time, VCC is the internal starting power supply of the charging pile, which can be a battery. Simultaneously, the coils of relays K1 and K2 are energized. Figure 2 In the diagram, K1_A and K2_A, the corresponding operating contacts of relays K1 and K2 are respectively... Figure 2 When the coils of relays K1 and K2 are energized, contacts K1_B and K2_B close respectively. The three-phase AC power supplied by the grid is applied to the three input terminals of the voltage correction module. After processing by the voltage correction module, a suitable electrical signal is output. The auxiliary power supply module is used to process the electrical signal output by the voltage correction module to obtain a suitable voltage signal. At this time, the power supply inside the charging pile can be suspended, and the auxiliary power supply module will supply power to the first charging control module. The control module starts to work, and the first output terminal of the control module can output a high-level signal applied to the base of transistor Q1, thereby keeping contacts K1_B and K2_B energized.
[0052] When the electric vehicle finishes charging, the control module can output a low-level signal to the base of transistor Q1. When transistor Q1 is powered on, the coils of relays K1 and K2 are de-energized, and contacts K1_B and K2_B are opened, thus entering a zero-power state.
[0053] As can be seen from the above, during the charging start-up phase, the charging detection module accurately triggers transistor Q1 to conduct, causing relays K1 and K2 to operate, quickly introducing three-phase AC power into the voltage correction module and ensuring efficient charging startup. The auxiliary power module converts the corrected electrical signal into a suitable voltage, providing timely power to the first charging control module, while simultaneously pausing internal power supply to optimize power efficiency. After the control module operates, it keeps the relay contacts engaged, ensuring stable charging. When charging ends, the control module cuts off the transistor, opens the relay contacts, and the charging pile enters a zero-power state, significantly reducing standby power loss, minimizing energy waste, and improving the overall energy-saving performance of the charging pile.
[0054] like Figure 2 As shown, in one embodiment of this disclosure, the first charging control module further includes: an optocoupler U1;
[0055] The first input terminal of optocoupler U1 is connected to the first output terminal of the control module, the second input terminal of optocoupler U1 is grounded, the first output terminal of optocoupler U1 is connected to the first output terminal of the auxiliary power supply module, and the second output terminal of optocoupler U1 is connected to the base of transistor Q1.
[0056] In this embodiment, when the control module outputs a signal, the LED on the input side of the optocoupler U1 is turned on and emits light. Through photoelectric conversion, the electrical signal on the input side is transmitted to the output side in the form of an optical signal, and then converted back to an electrical signal. This avoids direct electrical connection between the control module and the transistor Q1, effectively isolates electrical interference between the control module and subsequent circuits, and improves the circuit's anti-interference capability and stability.
[0057] like Figure 2 As shown, in one embodiment of this disclosure, the charging detection module includes: diode D3, capacitor C1, contact switch KEY1, resistor R5 and transistor Q3;
[0058] The anode of diode D3 is connected to the first output terminal of the auxiliary power module, the cathode of diode D3 is connected to the positive terminal of capacitor C1, the negative terminal of capacitor C1 is grounded, the positive terminal of capacitor C1 is connected to the first terminal of resistor R5 through contact switch KEY1, the first terminal of resistor R5 is connected to the collector of transistor Q3, the second terminal of resistor R5 is connected to the base of transistor Q3, and the emitter of transistor Q3 is connected to the base of transistor Q1.
[0059] like Figure 2 As shown, in one embodiment of this disclosure, the charging detection module further includes: a capacitor C2 and a resistor R3;
[0060] The first terminal of capacitor C2 is connected to the emitter of transistor Q3, the second terminal of capacitor C2 is grounded, and resistor R3 is connected in parallel with capacitor C2.
[0061] In this embodiment, the contact switch KEY1 can be located inside the charging gun. When the charging gun is inserted into the charging port of the electric vehicle, the contact switch KEY1 closes. The capacitor C1 has stored electrical energy beforehand. When the contact switch KEY1 closes, the capacitor C1 discharges, and the base of the transistor Q3 is energized and conducts. Therefore, the transistor Q1 also conducts, thereby energizing the coils K1_A and K2_A of the relays K1 and K2, and causing the contacts K1_B and K2_B to close.
[0062] Once the charging phase begins, the voltage signal output from the first output terminal of the auxiliary power module charges capacitor C1 through diode D3 until the voltage across diode D3 is less than 0.7V, at which point diode D3 is cut off, and the capacitor charging ends.
[0063] After transistor Q3 is turned on, capacitor C2 also begins to charge. As the voltage on capacitor C2 increases, the voltage between the base and emitter of transistor Q3 becomes less than 0.7V, at which point transistor Q3 is turned off.
[0064] When the charging gun is unplugged, the contact switch KEY1 closes and opens, and the control module outputs a low level. The voltage on capacitor C2 is released through resistor R3, the base of transistor Q1 becomes low, transistor Q1 is cut off, the coils K1_A and K2_A of relays K1 and K2 are de-energized, and contacts K1_B and K2_B are opened, thus entering a zero-power state.
[0065] As can be seen from the above, the settings of capacitor C2 and resistor R3 in the charging detection module, in conjunction with contact switch KEY1, achieve precise control of the charging process. When the charging gun is inserted, the relay is triggered promptly, initiating the charging process. During the charging phase, the auxiliary power supply charges capacitor C1, ensuring continuous and stable system operation. After the charging gun is removed, capacitor C2 discharges through resistor R3, causing the relay to disconnect promptly, and the charging pile enters a zero-power state, effectively avoiding unnecessary energy consumption and improving the energy-saving performance and utilization efficiency of the charging pile.
[0066] like Figure 1 As shown, in one embodiment of this disclosure, it further includes: a second charging control module;
[0067] The input terminal of the second charging control module is used to connect to the power grid, the output terminal of the second charging control module is connected to the input terminal of the voltage correction module, the power supply terminal of the second charging control module is connected to the first output terminal of the auxiliary power supply module, and the control terminal of the second charging control module is connected to the second output terminal of the control module.
[0068] like Figure 2 As shown, in one embodiment of this disclosure, the second charging control module includes: transistor Q2, relay K3, relay K4, resistor R1, and resistor R2;
[0069] The base of transistor Q2 is connected to the second output terminal of the control module, the emitter of transistor Q2 is grounded, the collector of transistor Q2 is connected to the first power supply terminals of relays K3 and K4 respectively, and the second power supply terminals of relays K3 and K4 are connected to the first output terminal of the auxiliary power supply module.
[0070] The first terminal of relay K3 is used to connect to phase A power, and the second terminal of relay K3 is connected to the first input terminal of the voltage correction module through resistor R1. The first terminal of relay K4 is used to connect to phase B power, and the second terminal of relay K4 is connected to the second input terminal of the voltage correction module through resistor R2. The third input terminal of the voltage correction module is used to connect to phase C power.
[0071] The first output terminal of the voltage correction module serves as the positive bus, the second output terminal serves as the neutral line, and the third output terminal serves as the negative bus.
[0072] In this embodiment, the coils of relay K3 and relay K4 are respectively Figure 2 In the diagram, K3_A and K4_A, the corresponding operating contacts of relays K3 and K4 are respectively... Figure 2 K3_B and K4_B in the example.
[0073] Contacts K3_B and K4_B are connected in parallel with contacts K1_B and K2_B, respectively. Resistors R1 and R2 are pre-charging resistors. During charging, the second output of the control module can first send a high-level signal to the base of transistor Q2, energizing the coils K3_A and K4_A of relays K3 and K4, respectively, closing contacts K3_B and K4_B. This reduces the inrush current during startup through resistors R1 and R2. Then, the control module sends a high-level signal to the base of transistor Q1. Therefore, [the following text is incomplete and requires further context: "for this purpose, can..."] Figure 2 Relays K3 and K4 are interchanged with relays K1 and K2. Relays K3 and K4 are controlled by transistor Q1, and relays K1 and K2 are controlled by transistor Q3.
[0074] In this embodiment, the second charging control module works on the same principle as the first charging control module, and will not be described in detail here.
[0075] like Figure 2 As shown, in one embodiment of this disclosure, the second charging control module further includes: an optocoupler U2;
[0076] The first input terminal of optocoupler U2 is connected to the second output terminal of the control module, the second input terminal of optocoupler U2 is grounded, the first output terminal of optocoupler U2 is connected to the first output terminal of the auxiliary power supply module, and the second output terminal of optocoupler U2 is connected to the base of transistor Q2.
[0077] In this embodiment, the optocoupler U2 also serves to isolate electrical interference between the control module and subsequent circuits, thereby improving the circuit's anti-interference capability and stability.
[0078] 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. Such 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. A stand-by zero power loss circuit for a charging station module, characterized by, include: The system includes a charging detection module, a first charging control module, a voltage correction module, an auxiliary power supply module, and a control module. The input terminal of the first charging control module is used to connect to the power grid, the output terminal of the first charging control module is connected to the input terminal of the voltage correction module, and the output terminal of the voltage correction module is used to output the charging voltage. The input terminal of the auxiliary power module is connected to the output terminal of the voltage correction module, the first output terminal of the auxiliary power module is connected to the power terminals of the charging detection module and the first charging control module respectively, and the second output terminal of the auxiliary power module is connected to the power terminal of the control module. The output terminal of the charging detection module is connected to the control terminal of the first charging control module, and the control terminal of the first charging control module is connected to the first output terminal of the control module. The charging detection module is configured to detect whether the charging gun head is connected to the charging port of the electric vehicle.
2. A stand-by zero power loss circuit for a charging station module as defined in claim 1, characterized in that, The first charging control module includes: transistor Q1, relay K1, and relay K2; The base of transistor Q1 is connected to the first output terminal of the control module, the emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to the first power supply terminals of relay K1 and relay K2 respectively, and the second power supply terminals of relay K1 and relay K2 are both connected to the first output terminal of the auxiliary power supply module. The first terminal of relay K1 is used to connect to phase A power, the second terminal of relay K1 is connected to the first input terminal of the voltage correction module, the first terminal of relay K2 is used to connect to phase B power, the second terminal of relay K2 is connected to the second input terminal of the voltage correction module, and the third input terminal of the voltage correction module is used to connect to phase C power. The first output terminal of the voltage correction module serves as the positive bus, the second output terminal of the voltage correction module serves as the neutral line, and the third output terminal of the voltage correction module serves as the negative bus.
3. A stand-by zero power loss circuit for a charging station module as defined in claim 2, characterized in that The first charging control module further includes: an optocoupler U1; The first input terminal of the optocoupler U1 is connected to the first output terminal of the control module, the second input terminal of the optocoupler U1 is grounded, the first output terminal of the optocoupler U1 is connected to the first output terminal of the auxiliary power supply module, and the second output terminal of the optocoupler U1 is connected to the base of the transistor Q1.
4. A stand-by zero power loss circuit for a charging station module as defined in claim 3, characterized in that, The charging detection module includes: diode D3, capacitor C1, contact switch KEY1, resistor R5 and transistor Q3; The anode of diode D3 is connected to the first output terminal of the auxiliary power module, the cathode of diode D3 is connected to the positive terminal of capacitor C1, the negative terminal of capacitor C1 is grounded, the positive terminal of capacitor C1 is connected to the first terminal of resistor R5 through contact switch KEY1, the first terminal of resistor R5 is connected to the collector of transistor Q3, the second terminal of resistor R5 is connected to the base of transistor Q3, and the emitter of transistor Q3 is connected to the base of transistor Q1.
5. A stand-by zero power loss circuit for a charging station module as defined in claim 4, characterized in that, The charging detection module also includes: capacitor C2 and resistor R3; The first terminal of capacitor C2 is connected to the emitter of transistor Q3, the second terminal of capacitor C2 is grounded, and resistor R3 is connected in parallel with capacitor C2.
6. A stand-by zero power loss circuit for a charging station module as defined in claim 1, wherein, Also includes: Second charging control module; The input terminal of the second charging control module is used to connect to the power grid, the output terminal of the second charging control module is connected to the input terminal of the voltage correction module, the power supply terminal of the second charging control module is connected to the first output terminal of the auxiliary power supply module, and the control terminal of the second charging control module is connected to the second output terminal of the control module.
7. A stand-by zero power loss circuit for a charging station module as defined in claim 6, characterized in that, The second charging control module includes: transistor Q2, relay K3, relay K4, resistor R1, and resistor R2; The base of transistor Q2 is connected to the second output terminal of the control module, the emitter of transistor Q2 is grounded, the collector of transistor Q2 is connected to the first power supply terminals of relay K3 and relay K4 respectively, and the second power supply terminals of relay K3 and relay K4 are connected to the first output terminal of the auxiliary power supply module. The first terminal of relay K3 is used to connect to phase A power, and the second terminal of relay K3 is connected to the first input terminal of the voltage correction module through resistor R1. The first terminal of relay K4 is used to connect to phase B power, and the second terminal of relay K4 is connected to the second input terminal of the voltage correction module through resistor R2. The third input terminal of the voltage correction module is used to connect to phase C power. The first output terminal of the voltage correction module serves as the positive bus, the second output terminal of the voltage correction module serves as the neutral line, and the third output terminal of the voltage correction module serves as the negative bus.
8. A stand-by zero power loss circuit for a charging station module as defined in claim 7, characterized in that, The second charging control module also includes: optocoupler U2; The first input terminal of the optocoupler U2 is connected to the second output terminal of the control module, the second input terminal of the optocoupler U2 is grounded, the first output terminal of the optocoupler U2 is connected to the first output terminal of the auxiliary power supply module, and the second output terminal of the optocoupler U2 is connected to the base of the transistor Q2.