Energy storage start-up circuit and device

Abstract

The application relates to an energy storage starting circuit and equipment, a positive pole of a manual switch circuit and a high-voltage power supply are connected, when the manual switch circuit is turned on, the positive pole of the high-voltage power supply is connected to a driving circuit through the manual switch circuit, the driving circuit is turned on, the energy of an energy storage circuit is sent to an electronic switch driving pole, and the electronic switch is quickly turned on. The auxiliary power supply is successfully started, a control circuit is powered, an isolating switch circuit is turned on, the manual switch circuit is locked, the positive pole of the high-voltage power supply is continuously connected to the driving circuit, the electronic switch is kept in a conducting state, and the manual switch is released. When the system needs to be turned off, the control circuit can send a closing signal to the isolating switch, the connection between the positive pole of the high-voltage power supply and the driving circuit is disconnected, only the energy storage circuit consumes power, and the power consumption for maintaining the conducting state is extremely low. The switch is automatically reset, the connection between the energy storage circuit and the auxiliary power supply cannot be disconnected, and the energy storage circuit is damaged due to power loss.

Description

Technical Field

[0001] This invention relates to the field of power electronics technology, and in particular to an energy storage start-up circuit and device. Background Technology

[0002] In the field of energy storage technology, energy storage system startup refers to the process by which an auxiliary power source, powered by energy storage batteries or the AC grid, starts the control system to ensure the automatic operation of energy storage equipment or its connection to a remote control system. The circuit that assists the auxiliary power system in obtaining DC or AC power is called the startup circuit.

[0003] The design of the startup circuit needs to solve two core problems: First, it should have automatic and manual startup functions. When the energy storage system is off-grid, it should be able to manually start the auxiliary power supply and then the system should be able to maintain its own power supply. When the grid is present, it should be able to automatically start the auxiliary power supply. Second, when the battery voltage is low, the system should be able to cut off the DC power supply to the battery to ensure battery safety.

[0004] In existing energy storage start-up circuits, the battery is connected to the system via a DC switch. After the DC switch is closed, the auxiliary power supply automatically obtains power. This design is relatively simple, but when the battery voltage is low, a tripping circuit is required to disconnect the DC switch. This is costly, and after the switch trips, it must be manually closed, resulting in high maintenance costs and low intelligence.

[0005] Some starting circuits use a high-voltage DC rotary switch, which is directly connected in parallel with the electronic switch. On the one hand, the cost is relatively high, and on the other hand, the DC rotary switch needs to be manually reset after the system starts. If it is not reset, the energy storage unit will continue to supply power to the auxiliary power source. When the low voltage protection is activated, the system cannot disconnect the connection between the energy storage unit and the auxiliary power source, resulting in the energy storage unit being depleted and damaged. Summary of the Invention

[0006] Therefore, it is necessary to provide an energy storage start-up circuit to address the problem of poor washing performance of traditional dryers. This circuit includes a control circuit, an isolation switch circuit, a manual switch circuit, an energy storage circuit, a drive circuit, an electronic switch, and an auxiliary power supply. The first terminal of the control circuit is connected to the first terminal of the isolating switch circuit, and the second terminal is connected to the first terminal of the auxiliary power supply. The second terminal of the isolating switch circuit is connected to the first terminal of the manual switch circuit; the second terminal of the manual switch circuit is connected to the first terminal of the energy storage circuit and is used to connect to the positive terminal of the high voltage source; the third terminal is connected to the first terminal of the drive circuit. The second end of the drive circuit is connected to the second end of the energy storage circuit, the third end is connected to the first end of the electronic switch, and the fourth end is connected to the third end of the energy storage circuit and is used to connect to the negative terminal of the high voltage source. The second terminal of the electronic switch is connected to the second terminal of the auxiliary power supply, and the third terminal is used to connect to the negative terminal of the high voltage source; the third terminal of the auxiliary power supply is connected to the positive terminal of the high voltage source.

[0007] In one embodiment, after the energy storage start-up circuit is manually started, the control circuit checks the minimum cell voltage of the energy storage circuit. If the minimum cell voltage is less than or equal to the first voltage, the control circuit shuts off the auxiliary power supply through the isolation switch circuit. If the lowest cell voltage is greater than the first voltage but lower than the second voltage, the control circuit maintains the current state. If the lowest cell voltage is greater than the second voltage, the control circuit will activate the auxiliary power supply.

[0008] In one embodiment, the disconnect switch circuit includes an disconnect control unit and a disconnect switch; The first terminal of the isolation control unit is connected to the first terminal of the control circuit, and the second terminal is connected to the first terminal of the isolation switch; the second terminal of the isolation switch is connected to the first terminal of the manual switch circuit.

[0009] In one embodiment, the isolation control unit includes resistors R1, R2, R3, R4, and R5, capacitors C1, C2, C3, and C4, transistor Q1, MOSFET Q2, and diode D1. The first end of resistor R1 is connected to the first end of the control circuit, and the second end is connected to the first end of resistor R2, the first end of capacitor C1, and the base of transistor Q1 respectively; the collector of transistor Q1 is connected to the first end of resistor R3 and the first end of resistor R4 respectively. The second end of resistor R3 is connected to the auxiliary power supply; the second end of resistor R4 is connected to the first end of resistor R5, the first end of capacitor C4, and the gate of MOSFET Q2; the second end of resistor R2, the second end of capacitor C1, the emitter of transistor Q1, the second end of resistor R5, the second end of capacitor C4, and the source of MOSFET Q2 are grounded; the isolating switch includes a relay RLY; The drain of MOSFET Q2 is connected to the anode of diode D1 and pin 2 of relay RLY, respectively; the first terminals of capacitor C2 and C3 are grounded; the second terminals of capacitor C2 and C3 and the cathode of diode D1 are connected to the auxiliary power supply; the cathode of diode D1 is also connected to pin 1 of relay RLY.

[0010] In one embodiment, the manual switch circuit includes resistors R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, and a manual switch SW. Resistors R6, R7, R8, R9, R10, and R11 are connected in sequence; the first end of resistor R6 is connected to the first end of the energy storage circuit, the positive terminal of the high voltage source, and the third end of the auxiliary power supply; the first end of resistor R11 is connected to the first end of manual switch SW; the first end of manual switch SW is connected to the isolating switch. Resistors R12, R13, R14, R15, R16, and R17 are connected in sequence; the first end of resistor R12 is connected to the second end of manual switch SW; the second end of manual switch SW is connected to the isolating switch; the first end of resistor R17 is used to connect to the first end of the drive circuit.

[0011] In one embodiment, the driving circuit includes resistors R18, R19, R20, and R21, MOSFET Q3, MOSFET Q4, capacitor C5, and capacitor C6. The source of MOSFET Q3 is connected to the first terminal of resistor R18, the first terminal of resistor R19, the first terminal of capacitor C5, and the third terminal of the manual switch circuit. The gate is connected to the collector of MOSFET Q4. The source is connected to the first terminal of resistor R20 and the first terminal of resistor R21. The second terminal of resistor R20 is connected to the first terminal of capacitor C6 and the first terminal of the electronic switch. The base of MOSFET Q4 is connected to the first terminal of resistor R18 and the first terminal of capacitor C5, respectively. The emitter is connected to the second terminal of capacitor C5, the second terminal of resistor R18, the second terminal of resistor R21 and the second terminal of capacitor C6, respectively, and is used to connect to the negative terminal of the high voltage source.

[0012] In one embodiment, the electronic switch includes an insulated gate bipolar transistor Q5; The gate of the insulated gate bipolar transistor Q5 is connected to the second end of resistor R20 and the first end of capacitor C6, respectively. The emitter is used to connect to the negative terminal of the high voltage source, and the collector is connected to the auxiliary power supply.

[0013] In one embodiment, the energy storage circuit includes resistors R22, R23, R24, R25, R26, R27, and R28, a Zener diode Z1, a capacitor C7, and a capacitor C8. Resistors R22, R23, R24, R25, R26, and R27 are connected in sequence. The first end of resistor R22 is used to connect to the positive terminal of the high-voltage source. The first end of resistor R27 is connected to the first end of resistor R28, the cathode of Zener diode Z1, the first end of capacitor C7, the first end of capacitor C8, and the second terminal of the drive circuit. The second end of resistor R28, the anode of Zener diode Z1, the second end of capacitor C7, and the second end of capacitor C8 are connected to each other and connected to the fourth terminal of the drive circuit, and are used to connect to the negative terminal of the high-voltage source.

[0014] An energy storage starting device includes the aforementioned energy storage starting circuit.

[0015] One of the above technical solutions has the following advantages and beneficial effects: The energy storage startup circuits provided in the embodiments of this application include a control circuit, an isolating switch circuit, a manual switch circuit, an energy storage circuit, a drive circuit, an electronic switch, and an auxiliary power supply. The energy storage circuit is directly connected to the high-voltage power supply to store energy from the drive circuit. The manual switch circuit is connected to the positive terminal of the high-voltage power supply. When the manual switch circuit is turned on, the positive terminal of the high-voltage power supply is connected to the drive circuit through the manual switch circuit, opening the drive circuit and sending the energy from the energy storage circuit to the drive terminal of the electronic switch, quickly opening the electronic switch. Subsequently, the auxiliary power supply successfully starts, the control circuit is energized, and the isolating switch circuit is turned on, thereby locking the manual switch circuit and continuously connecting the positive terminal of the high-voltage power supply to the drive circuit, keeping the electronic switch in a conducting state. At this time, the manual switch can be released. Therefore, the power consumption of the energy storage circuit is very low. When the system needs to be shut down, the control circuit can send a shutdown signal to the isolating switch, disconnecting the connection between the positive terminal of the high-voltage power supply and the drive circuit. At this time, only the energy storage circuit consumes power. Because the electronic switch is a voltage-driven device, the power consumption to maintain conduction is extremely low, so the power consumption of the energy storage circuit is very small when the system is in standby mode. It also enables automatic switch reset, avoiding the inability to disconnect the energy storage circuit from the auxiliary power supply, which could lead to power loss and damage to the energy storage circuit. In addition, this application does not require a high-voltage switch, making it cheaper to implement than existing technologies. Attached Figure Description

[0016] The above and other objects, features, and advantages of this application will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the main points of this application.

[0017] Figure 1 This is a schematic diagram of the energy storage start-up circuit in an embodiment of this application.

[0018] Figure 2 This is a circuit diagram of the energy storage startup circuit in an embodiment of this application.

[0019] Figure 3 This is a control logic diagram of the auxiliary power supply in an embodiment of this application. Detailed Implementation

[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate preferred embodiments of the application. However, this application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0021] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "set up," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] An energy storage startup circuit is a circuit that uses energy storage components (such as capacitors or inductors) to provide a large initial current at the moment the device is powered on. Its core function is to solve the problem of power supply voltage drops or device failure to start due to excessively high instantaneous power demand during device startup. The circuit stores energy through pre-charging before power-on and rapidly releases this energy during startup, forming a "current buffer" that meets the device's startup requirements while avoiding impact on the main power supply. To address the issue of traditional startup circuits not being able to automatically reset, in one embodiment, such as... Figure 1 As shown, an energy storage start-up circuit is provided, including a control circuit 11, an isolating switch circuit 13, a manual switch circuit 15, an energy storage circuit 19, a drive circuit 17, an electronic switch 21, and an auxiliary power supply 23.

[0024] The specific connection relationships of the energy storage start-up circuit are as follows: the first terminal of the control circuit 11 is connected to the first terminal of the isolating switch circuit 13, and the second terminal is connected to the first terminal of the auxiliary power supply 23; the second terminal of the isolating switch circuit 13 is connected to the first terminal of the manual switch circuit 15; the second terminal of the manual switch circuit 15 is connected to the first terminal of the energy storage circuit 19 and is used to connect to the positive terminal of the high voltage source, and the third terminal is connected to the first terminal of the drive circuit 17; the second terminal of the drive circuit 17 is connected to the second terminal of the energy storage circuit 19, the third terminal is connected to the first terminal of the electronic switch 21, the fourth terminal is connected to the third terminal of the energy storage circuit 19 and is used to connect to the negative terminal of the high voltage source; the second terminal of the electronic switch 21 is connected to the second terminal of the auxiliary power supply 23, and the third terminal is used to connect to the negative terminal of the high voltage source; the third terminal of the auxiliary power supply 23 is connected to the positive terminal of the high voltage source.

[0025] The control circuit 11 provides control signals to the isolating switch circuit 13, so that the isolating switch circuit 13 controls the manual switch circuit 15 to lock in the on state, or controls the manual switch circuit 15 to switch from the on state to the off state. For example, the control circuit 11 can be implemented using an MCU (Microcontroller Unit), but other methods besides MCU are not excluded from implementing the control circuit 11.

[0026] The main function of the disconnecting switch circuit 13 is to isolate the power supply from the energy storage system, ensuring a clear disconnection point during maintenance or repair, preventing accidental live operation, and ensuring the safety of personnel and equipment. In one example, the disconnecting switch circuit 13 includes an isolation control unit and a disconnecting switch; the first terminal of the isolation control unit is connected to the first terminal of the control circuit 11, and the second terminal is connected to the first terminal of the disconnecting switch; the second terminal of the disconnecting switch is connected to the first terminal of the manual switch circuit 15.

[0027] There are various ways to implement isolation control units, such as... Figure 2 As shown, in one example, a feasible approach is provided whereby the isolation control unit includes resistors R1, R2, R3, R4, and R5, capacitors C1, C2, C3, and C4, transistor Q1, MOSFET Q2, and diode D1; the isolation switch includes a relay RLY. The first terminal of resistor R1 is connected to the first terminal of control circuit 11, and its second terminal is connected to the first terminal of resistor R2, the first terminal of capacitor C1, and the base of transistor Q1, respectively; the collector of transistor Q1 is connected to the first terminals of resistors R3 and R4, respectively.

[0028] The second end of resistor R3 is connected to auxiliary power supply 23; the second end of resistor R4 is connected to the first end of resistor R5, the first end of capacitor C4, and the gate of MOSFET Q2; the second end of resistor R2, the second end of capacitor C1, the emitter of transistor Q1, the second end of resistor R5, the second end of capacitor C4, and the source of MOSFET Q2 are grounded.

[0029] The drain of MOSFET Q2 is connected to the anode of diode D1 and pin 2 of relay RLY, respectively; the first terminals of capacitor C2 and C3 are grounded; the second terminals of capacitor C2 and C3 and the cathode of diode D1 are connected to auxiliary power supply 23; the cathode of diode D1 is also connected to pin 1 of relay RLY.

[0030] The manual switch circuit 15 is mainly used to manually complete the energy storage preparation when the energy storage start-up circuit needs to be started, ensuring that the energy storage start-up circuit can start normally. The manual switch circuit 15 can be implemented in various ways, such as... Figure 2As shown, in one example, a feasible approach is provided whereby the manual switch circuit 15 includes resistors R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, and a manual switch SW.

[0031] Resistors R6, R7, R8, R9, R10, and R11 are connected in sequence; the first end of resistor R6 is connected to the first end of energy storage circuit 19, the positive terminal of high voltage source, and the third end of auxiliary power supply 23; the first end of resistor R11 is connected to the first end of manual switch SW; the first end of manual switch SW is connected to disconnect switch.

[0032] Resistors R12, R13, R14, R15, R16, and R17 are connected in sequence; the first end of resistor R12 is connected to the second end of manual switch SW; the second end of manual switch SW is connected to the isolating switch; the first end of resistor R17 is used to connect to the first end of drive circuit 17.

[0033] The core function of the drive circuit 17 is to amplify control signals (such as pulses) and convert them into the voltage and current required by power devices (such as IGBTs and MOSFETs), ensuring their rapid and reliable turn-on and turn-off. Simultaneously, the drive circuit 17 reduces switching losses and improves system stability through electrical isolation and signal shaping, and possesses overcurrent and overvoltage protection functions to ensure the safety of the energy storage system during high-power operation. Essentially, it serves as the interface connecting the control circuit 11 and the power devices, achieving efficient and reliable energy conversion and control. The drive circuit 17 can be implemented in various ways, such as... Figure 2 As shown, in one example, a feasible approach is provided, in which the drive circuit 17 includes resistors R18, R19, R20, and R21, MOSFETs Q3 and Q4, capacitor C5, and capacitor C6.

[0034] The source of MOSFET Q3 is connected to the first terminal of resistor R18, the first terminal of resistor R19, the first terminal of capacitor C5 and the third terminal of manual switch circuit 15, respectively. The gate is connected to the collector of MOSFET Q4, and the source is connected to the first terminal of resistor R20 and the first terminal of resistor R21, respectively. The second terminal of resistor R20 is connected to the first terminal of capacitor C6 and the first terminal of electronic switch 21, respectively.

[0035] The base of MOSFET Q4 is connected to the first terminal of resistor R18 and the first terminal of capacitor C5, respectively. The emitter is connected to the second terminal of capacitor C5, the second terminal of resistor R18, the second terminal of resistor R21 and the second terminal of capacitor C6, respectively, and is used to connect to the negative terminal of the high voltage source.

[0036] The core function of the electronic switch 21 is to quickly connect or disconnect the circuit via electronic control signals, thereby achieving precise control of the energy storage device. Its working principle is typically based on electromagnetic induction or semiconductor technology. For example, an electromagnetic switch drives contact action through a magnetic field generated by a coil, or a relay / thyristor controlled by a microcontroller achieves circuit switching. The electronic switch 21 closes the circuit upon startup, charging the energy storage system (such as a battery or capacitor); after startup, it disconnects the circuit to prevent overload and releases the stored energy through intelligent control when needed (such as the high-voltage discharge system in an electric vehicle). Furthermore, it can quickly cut off the power supply in case of faults or power outages, ensuring system safety. This rapid response and controllability make it an indispensable key component in modern energy storage systems. The electronic switch 21 can be implemented in various ways, such as... Figure 2 As shown, in one example, a feasible approach is provided whereby electronic switch 21 includes an insulated-gate bipolar transistor (IGBT) Q5; the gate of the IGBT Q5 is connected to the second terminal of resistor R20 and the first terminal of capacitor C6, respectively, the emitter is used to connect to the negative terminal of a high-voltage source, and the collector is connected to an auxiliary power supply 23.

[0037] The core function of the energy storage circuit 19 is to store energy and release it on demand to support the circuit's startup or maintenance. For example, in a circuit breaker, the energy storage device stores energy through a spring or capacitor to power the closing operation; in a switching power supply, inductors and capacitors work together to achieve continuous energy supply; in a sensor power supply system, the energy storage circuit 19 maintains short-term power supply through capacitor discharge or achieves energy dispatch through a DC-DC converter. Essentially, it buffers, regulates, or switches energy through energy storage elements (such as capacitors, inductors, and batteries) to ensure stable circuit operation under transient or abnormal conditions. The energy storage circuit 19 can be implemented in various ways, such as... Figure 2 As shown, in one example, a feasible approach is provided whereby the energy storage circuit 19 includes resistors R22, R23, R24, R25, R26, R27, and R28, a Zener diode Z1, and capacitors C7 and C8. Resistors R22, R23, R24, R25, R26, and R27 are connected in sequence. The first end of resistor R22 is used to connect to the positive terminal of the high-voltage source. The first end of resistor R27 is connected to the first end of resistor R28, the cathode of Zener diode Z1, the first end of capacitor C7, the first end of capacitor C8, and the second end of the drive circuit 17. The second end of resistor R28, the anode of Zener diode Z1, the second end of capacitor C7, and the second end of capacitor C8 are interconnected and connected to the fourth end of the drive circuit 17, and are used to connect to the negative terminal of the high-voltage source.

[0038] The operating logic of the energy storage startup circuit is as follows: When the manual switch circuit is activated, the positive terminal of the high-voltage source is connected to the drive circuit through the manual switch circuit, turning on the drive circuit and sending energy from the energy storage circuit to the electronic switch driver to open the electronic switch. When the auxiliary power supply starts, the control circuit is energized and closes the isolating switch to lock the manual switch circuit, continuously connecting the positive terminal of the high-voltage source to the drive circuit to keep the electronic switch in a conducting state. At this point, the manual switch can be released. When the energy storage startup circuit needs to be shut down, the control circuit can send a shutdown signal to the isolating switch, disconnecting the connection between the positive terminal of the high-voltage source and the drive circuit.

[0039] In the above steps, the auxiliary power supply can be controlled to start and stop based on the following steps: In one example, such as Figure 3 As shown, after manually starting the energy storage start-up circuit, the control circuit checks the minimum cell voltage of the energy storage circuit. If the minimum cell voltage is less than or equal to the first voltage, the control circuit shuts off the auxiliary power supply through the isolating switch circuit. If the minimum cell voltage is greater than the first voltage but lower than the second voltage, the control circuit maintains the current state. If the minimum cell voltage is greater than the second voltage, the control circuit controls the auxiliary power supply to start. It should be noted that the first voltage is less than the second voltage.

[0040] By utilizing the aforementioned control of the auxiliary power supply, a stable, safe, and isolated low-voltage power supply is provided to the entire energy storage system. This ensures that the system can obtain energy and begin the startup process during cold starts. It precisely manages the complex timing and safety constraints of the startup process. During system operation and standby, it efficiently and reliably supplies power to low-voltage loads.

[0041] In a specific example, such as Figure 2 As shown, an energy storage start-up circuit is provided, including a control circuit 11, an isolating switch circuit 13, a manual switch circuit 15, an energy storage circuit 19, a drive circuit 17, an electronic switch 21, and an auxiliary power supply 23.

[0042] The isolating switch circuit 13 includes an isolating control unit and an isolating switch; the first end of the isolating control unit is connected to the first end of the control circuit 11, and the second end is connected to the first end of the isolating switch; the second end of the isolating switch is connected to the first end of the manual switch circuit 15.

[0043] The isolation control unit includes resistors R1, R2, R3, R4, and R5, capacitors C1, C2, C3, and C4, transistor Q1, MOSFET Q2, and diode D1.

[0044] The manual switch circuit 15 includes resistors R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, and R17, as well as a manual switch SW.

[0045] The drive circuit 17 includes resistors R18, R19, R20, and R21, MOSFETs Q3 and Q4, capacitors C5 and C6. The electronic switch 21 includes an insulated-gate bipolar transistor Q5.

[0046] The energy storage circuit 19 includes resistors R22, R23, R24, R25, R26, R27, and R28, a Zener diode Z1, and capacitors C7 and C8.

[0047] The first end of resistor R1 is connected to the first end of control circuit 11, and the second end is connected to the first end of resistor R2, the first end of capacitor C1 and the base of transistor Q1 respectively; the collector of transistor Q1 is connected to the first end of resistor R3 and the first end of resistor R4 respectively.

[0048] The second end of resistor R3 is connected to auxiliary power supply 23; the second end of resistor R4 is connected to the first end of resistor R5, the first end of capacitor C4, and the gate of MOSFET Q2; the second end of resistor R2, the second end of capacitor C1, the emitter of transistor Q1, the second end of resistor R5, the second end of capacitor C4, and the source of MOSFET Q2 are grounded.

[0049] The drain of MOSFET Q2 is connected to the anode of diode D1 and the isolating switch, respectively; the first terminals of capacitor C2 and C3 are grounded; the second terminals of capacitor C2 and C3 and the cathode of diode D1 are connected to auxiliary power supply 23; the cathode of diode D1 is also connected to the isolating switch.

[0050] Resistors R6, R7, R8, R9, R10, and R11 are connected in sequence; the first end of resistor R6 is connected to the first end of resistor R22, the positive terminal of the high voltage source, and the third end of auxiliary power supply 23; the first end of resistor R11 is connected to the first end of manual switch SW; the first end of manual switch SW is connected to the isolating switch (i.e., connected to pin 3 of relay RLY).

[0051] Resistors R12, R13, R14, R15, R16, and R17 are connected in sequence; the first end of resistor R12 is connected to the second end of manual switch SW; the second end of manual switch SW is connected to disconnect switch (i.e., connected to pin 4 of relay RLY); the first end of resistor R17 is connected to the first end of capacitor C5 and the first end of resistor R18.

[0052] The source of MOSFET Q3 is connected to the first terminals of resistors R18, R19, C5, and R17, respectively. The gate is connected to the collector of MOSFET Q4, and the source is connected to the first terminals of resistors R20 and R21, respectively. The second terminal of resistor R20 is connected to the first terminal of capacitor C6 and the gate of insulated gate bipolar transistor Q5, respectively.

[0053] The base of MOSFET Q4 is connected to the first terminal of resistor R18 and the first terminal of capacitor C5, respectively. The emitter is connected to the second terminal of capacitor C5, the second terminal of resistor R18, the second terminal of resistor R21 and the second terminal of capacitor C6, respectively, and is used to connect to the negative terminal of the high voltage source.

[0054] The gate of the insulated gate bipolar transistor Q5 is connected to the second end of resistor R20 and the first end of capacitor C6, respectively. The emitter is used to connect to the negative terminal of the high voltage source, and the collector is connected to the auxiliary power supply 23.

[0055] Resistors R22, R23, R24, R25, R26, and R27 are connected in sequence. The first end of resistor R22 is used to connect to the positive terminal of the high-voltage source. The first end of resistor R27 is connected to the first end of resistor R28, the cathode of Zener diode Z1, the first end of capacitor C7, the first end of capacitor C8, and the second end of drive circuit 17. The second end of resistor R28, the anode of Zener diode Z1, the second end of capacitor C7, and the second end of capacitor C8 are connected to each other and connected to the source of MOSFET Q3 and the first end of resistor R19, and are used to connect to the negative terminal of the high-voltage source.

[0056] The energy storage startup circuit of this application includes a control circuit 11, an isolating switch circuit 13, a manual switch circuit 15, an energy storage circuit 19, a drive circuit 17, an electronic switch 21, and an auxiliary power supply 23. The energy storage startup circuit is connected to the high-voltage power supply via the manual switch circuit 15. When the manual switch circuit 15 is turned on, the positive terminal of the high-voltage power supply is connected to the energy storage circuit 19 through the manual switch circuit 15. When the voltage of the energy storage circuit 19 reaches threshold 1, the shut-off circuit is blocked; when the voltage of the energy storage circuit 19 reaches threshold 2, the turn-on circuit is quickly opened, driving the electronic switch 21 to conduct. Subsequently, the auxiliary power supply 23 is successfully started, the control circuit 11 is energized, and the isolating switch is turned on, thereby locking the manual switch circuit 15, continuously connecting the positive terminal of the high-voltage power supply to the energy storage circuit 19, keeping the electronic switch 21 in a conducting state. At this time, the manual switch can be released. When the system needs to be shut down, the control circuit 11 can send a shutdown signal to the isolating switch, disconnecting the connection between the positive terminal of the high-voltage power supply and the energy storage circuit 19. The voltage of the isolating circuit drops rapidly below threshold 1, causing the shutdown circuit to quickly conduct, thereby turning off the electronic switch 21. Therefore, the startup circuit consumes zero power when the system is in standby mode. This achieves automatic switch reset, avoiding the inability to disconnect the connection between the energy storage circuit 19 and the auxiliary power supply 23, which could lead to the energy storage circuit 19 being damaged by power depletion. In addition, this application does not require a high-voltage switch, making its implementation less expensive than existing technologies.

[0057] In one embodiment, an energy storage starting device is provided, including the aforementioned energy storage starting circuit. For example, the device can be an electrode driving device, a high-power electronic device, a switching power supply, etc. In addition to the energy storage starting circuit, the device also includes other corresponding components. Because the energy storage starting circuit of this application achieves automatic switch reset, it avoids the inability to disconnect the connection between the energy storage circuit 19 and the auxiliary power supply 23, preventing the energy storage circuit 19 from being damaged by power depletion. Furthermore, this application does not require a high-voltage switch, making its implementation lower in cost than existing technologies, resulting in higher safety performance, longer lifespan, and lower manufacturing costs.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An energy storage start-up circuit, characterized in that, It includes control circuits, disconnector circuits, manual switch circuits, energy storage circuits, drive circuits, electronic switches, and auxiliary power supplies; The first terminal of the control circuit is connected to the first terminal of the isolating switch circuit, and the second terminal is connected to the first terminal of the auxiliary power supply. The second terminal of the isolating switch circuit is connected to the first terminal of the manual switch circuit; the second terminal of the manual switch circuit is connected to the first terminal of the energy storage circuit and is used to connect to the positive terminal of the high voltage source; the third terminal is connected to the first terminal of the drive circuit. The second end of the drive circuit is connected to the second end of the energy storage circuit, the third end is connected to the first end of the electronic switch, the fourth end is connected to the third end of the energy storage circuit, and is used to connect to the negative terminal of the high voltage source. The second end of the electronic switch is connected to the second end of the auxiliary power supply, and the third end is used to connect to the negative terminal of the high voltage source; the third end of the auxiliary power supply is connected to the positive terminal of the high voltage source.

2. The energy storage start-up circuit according to claim 1, characterized in that, After the energy storage start-up circuit is manually started, the control circuit checks the minimum cell voltage of the energy storage circuit. If the minimum cell voltage is less than or equal to the first voltage, the control circuit shuts off the auxiliary power supply through the isolation switch circuit. If the minimum cell voltage is greater than the first voltage but lower than the second voltage, the control circuit maintains the current state; If the minimum cell voltage is greater than the second voltage, the control circuit controls the auxiliary power supply to be turned on.

3. The energy storage start-up circuit according to claim 1 or 2, characterized in that, The isolating switch circuit includes an isolating control unit and an isolating switch; The first end of the isolation control unit is connected to the first end of the control circuit, and the second end is connected to the first end of the isolation switch; the second end of the isolation switch is connected to the first end of the manual switch circuit.

4. The energy storage start-up circuit according to claim 3, characterized in that, The isolation control unit includes resistors R1, R2, R3, R4, and R5; capacitors C1, C2, C3, and C4; transistor Q1; MOSFET Q2; and diode D1; the isolation switch includes a relay RLY. The first end of resistor R1 is connected to the first end of the control circuit, and the second end is connected to the first end of resistor R2, the first end of capacitor C1, and the base of transistor Q1; the collector of transistor Q1 is connected to the first end of resistor R3 and the first end of resistor R4. The second end of resistor R3 is connected to the auxiliary power supply; the second end of resistor R4 is connected to the first end of resistor R5, the first end of capacitor C4, and the gate of MOSFET Q2; the second end of resistor R2, the second end of capacitor C1, the emitter of transistor Q1, the second end of resistor R5, the second end of capacitor C4, and the source of MOSFET Q2 are grounded. The drain of the MOSFET Q2 is connected to the anode of the diode D1 and pin 2 of the relay RLY, respectively; the first terminals of the capacitor C2 and the first terminals of the capacitor C3 are grounded; the second terminals of the capacitor C2 and the second terminals of the capacitor C3 and the cathode of the diode D1 are connected to the auxiliary power supply; the cathode of the diode D1 is also connected to pin 1 of the relay RLY.

5. The energy storage start-up circuit according to claim 1 or 2, characterized in that, The manual switch circuit includes resistors R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, and R17, as well as a manual switch SW. The resistors R6, R7, R8, R9, R10, and R11 are connected in sequence; the first end of the resistor R6 is connected to the first end of the energy storage circuit, the positive terminal of the high voltage source, and the third end of the auxiliary power supply; the first end of the resistor R11 is connected to the first end of the manual switch SW; the first end of the manual switch SW is connected to the isolating switch. Resistors R12, R13, R14, R15, R16, and R17 are connected in sequence; the first end of resistor R12 is connected to the second end of manual switch SW; the second end of manual switch SW is connected to the isolating switch; the first end of resistor R17 is used to connect to the first end of the drive circuit.

6. The energy storage start-up circuit according to claim 1 or 2, characterized in that, The driving circuit includes resistors R18, R19, R20, and R21, MOSFETs Q3 and Q4, capacitor C5, and capacitor C6. The source of the MOS transistor Q3 is connected to the first terminal of the resistor R18, the first terminal of the resistor R19, the first terminal of the capacitor C5, and the third terminal of the manual switch circuit. The gate is connected to the collector of the MOS transistor Q4, and the source is connected to the first terminal of the resistor R20 and the first terminal of the resistor R21. The second terminal of the resistor R20 is connected to the first terminal of the capacitor C6 and the first terminal of the electronic switch. The base of the MOS transistor Q4 is connected to the first terminal of the resistor R18 and the first terminal of the capacitor C5, respectively. The emitter is connected to the second terminal of the capacitor C5, the second terminal of the resistor R18, the second terminal of the resistor R21 and the second terminal of the capacitor C6, respectively, and is used to connect to the negative terminal of the high voltage source.

7. The energy storage start-up circuit according to claim 6, characterized in that, The electronic switch includes an insulated gate bipolar transistor Q5; The gate of the insulated gate bipolar transistor Q5 is connected to the second terminal of the resistor R20 and the first terminal of the capacitor C6, respectively. The emitter is used to connect to the negative terminal of the high voltage source, and the collector is connected to the auxiliary power supply.

8. The energy storage start-up circuit according to claim 1 or 2, characterized in that, The energy storage circuit includes resistors R22, R23, R24, R25, R26, R27, and R28, a Zener diode Z1, capacitors C7 and C8. Resistors R22, R23, R24, R25, R26, and R27 are connected in sequence. The first end of resistor R22 is used to connect to the positive terminal of the high-voltage source. The first end of resistor R27 is connected to the first end of resistor R28, the cathode of Zener diode Z1, the first end of capacitor C7, the first end of capacitor C8, and the second end of the driving circuit. The second end of resistor R28, the anode of Zener diode Z1, the second end of capacitor C7, and the second end of capacitor C8 are interconnected and connected to the fourth end of the driving circuit, and are used to connect to the negative terminal of the high-voltage source.

9. An energy storage start-up device, characterized in that, Includes the energy storage start-up circuit as described in any one of claims 1 to 8.

Images