Energy storage start-up circuit and device

Abstract

The utility model relates to a kind of energy storage starting circuit and equipment.When the manual switch circuit is connected in energy storage starting circuit, the voltage of energy storage circuit reaches threshold 1, and the shutdown circuit is blocked;When the voltage of energy storage circuit reaches threshold 2, the on circuit is quickly opened, and the drive electronic switch is turned on, then, the auxiliary power supply is successfully started, the control circuit is powered, the isolating switch circuit is connected, so as to lock the manual switch circuit, the positive pole of high-voltage power supply is continuously connected with energy storage circuit, and the electronic switch is kept in the on state, at this time, the manual switch circuit can be released.When the system needs to be closed, the control circuit can send a closing signal to the isolating switch, disconnect the positive pole of high-voltage power supply from energy storage circuit, and the circuit voltage drops rapidly below threshold 1, the shutdown circuit is quickly turned on, and the electronic switch is turned off.So, the system is on standby, and the starting circuit has zero power consumption.Thus, the switch is automatically reset, and the energy storage circuit is prevented from being damaged by power loss.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and in particular to an energy storage starting 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. Utility Model Content

[0006] Therefore, it is necessary to provide an energy storage starting circuit to address the problem that traditional starting circuits cannot automatically reset. This circuit includes a control circuit, an isolating switch circuit, a manual switch circuit, an isolation circuit, a turn-on circuit, an energy storage circuit, a turn-off circuit, an electronic switch, and an auxiliary power supply.

[0007] 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.

[0008] 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 blocking circuit and the first terminal of the shut-off circuit respectively, and the third terminal is used to connect to the positive terminal of the high voltage source; the second terminal of the blocking circuit is connected to the first terminal of the energy storage circuit.

[0009] The first end of the turn-on circuit is connected to the second end of the energy storage circuit. The second end is connected to the first end of the electronic switch and the second end of the turn-off circuit. The third end is connected to the third end of the turn-off circuit, the second end of the electronic switch, and the third end of the energy storage circuit, and is used to connect to the negative terminal of the high-voltage source.

[0010] The third terminal of the electronic switch is connected to the second terminal of the auxiliary power supply; the third terminal of the auxiliary power supply is connected to the positive terminal of the high voltage source.

[0011] In one embodiment, the disconnect switch circuit includes an disconnect control unit and a disconnect switch;

[0012] 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.

[0013] 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 isolation switch includes a relay RLY.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] Resistors R6, R7, R8, R9, R10, and R11 are connected in sequence; the first end of resistor R6 is connected to the positive terminal of the high-voltage source and the third terminal of the auxiliary power supply, and 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.

[0019] 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; the first end of resistor R17 is used to connect the first end of the blocking circuit and the first end of the shut-off circuit.

[0020] In one embodiment, the blocking circuit includes a diode D2; the anode of the diode D2 is connected to the first terminal of the resistor R17 and the first terminal of the turn-off circuit, respectively, and the cathode is connected to the first terminal of the energy storage circuit.

[0021] In one embodiment, the turn-on circuit includes resistors R18, R19, R20, and R21, MOSFET Q3, capacitor C5, and Zener diode Z1.

[0022] The source of MOSFET Q3 is connected to the first terminal of resistor R18 and the second terminal of the energy storage circuit, respectively; the gate of MOSFET Q3 is connected to the second terminal of resistor R18 and the cathode of Zener diode Z1, respectively, and the drain is connected to the first terminal of resistor R19.

[0023] The first end of resistor R20 is connected to the second end of resistor R19 and the second end of the circuit cutoff. The second end is connected to the first end of capacitor C5, the first end of resistor R21 and the first end of electronic switch respectively.

[0024] The anode of Zener diode Z1, the second terminal of capacitor C5, the second terminal of resistor R21, the third terminal of the turn-off circuit, and the third terminal of the energy storage circuit are connected together and used to connect to the negative terminal of the high-voltage source.

[0025] In one embodiment, the shutdown circuit includes a transistor Q4; the base of transistor Q4 is connected to the second terminal of the manual switch circuit and the first terminal of the blocking circuit, the collector is connected to the second terminal of resistor R19 and the first terminal of resistor R20, and the emitter is connected to the anode of Zener diode Z1, the second terminal of capacitor C5, the second terminal of resistor R21 and the third terminal of the energy storage circuit.

[0026] In one embodiment, the electronic switch includes an insulated gate bipolar transistor Q5;

[0027] The gate of the insulated gate bipolar transistor Q5 is connected to the turn-on circuit, 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.

[0028] In one embodiment, the energy storage circuit includes a Zener diode Z2 and a capacitor C6;

[0029] The cathode of Zener diode Z2 is connected to the first terminal of capacitor C6, the second terminal of the blocking circuit, and the first terminal of the turn-on circuit, respectively; the anode of Zener diode Z2 is connected to the second terminal of capacitor C6 and the third terminal of the turn-on circuit, respectively, and is used as the negative terminal of the high voltage source.

[0030] A device comprising the aforementioned energy storage start-up circuit.

[0031] One of the above technical solutions has the following advantages and beneficial effects:

[0032] The energy storage startup circuits provided in the embodiments of this application include a control circuit, an isolating switch circuit, a manual switch circuit, a blocking circuit, a turn-on circuit, an energy storage circuit, a turn-off circuit, an electronic switch, and an auxiliary power supply. The energy storage startup circuit of this application is connected to the high-voltage power supply via the manual switch circuit. When the manual switch circuit is turned on, the positive terminal of the high-voltage power supply is connected to the energy storage circuit through the manual switch circuit. When the voltage of the energy storage circuit reaches threshold 1, the turn-off circuit is blocked; when the voltage of the energy storage circuit reaches threshold 2, the turn-on circuit quickly opens, driving the electronic switch to conduct. 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 energy storage circuit, keeping the electronic switch in a conducting state. At this time, the manual switch circuit can be released. 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 energy storage circuit. The voltage of the blocking circuit quickly drops below threshold 1, causing the turn-off circuit to quickly conduct, thereby turning off the electronic switch. Therefore, the startup circuit consumes zero power when the system is in standby mode. This enables automatic switch reset, preventing the failure 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

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the energy storage start-up circuit in an embodiment of this application.

[0035] Figure 2 This is a circuit diagram of the energy storage start-up circuit in an embodiment of this application. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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.

[0039] An energy storage startup circuit is a circuit that uses energy storage components (such as capacitors or inductors) to provide an initial large 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 normally due to excessive instantaneous power demand during device startup. The circuit stores energy through pre-charging before power-on and rapidly releases energy during startup, forming a "current buffer" that meets the device startup requirements while avoiding impact on the main power supply. To address the problem 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 isolation circuit 25, an on-circuit circuit 19, an energy storage circuit 17, an off-circuit circuit 27, an electronic switch 21, and an auxiliary power supply 23.

[0040] The specific connection relationship of the energy storage start-up circuit is as follows: the first end of the control circuit 11 is connected to the first end of the isolating switch circuit 13, and the second end is connected to the first end of the auxiliary power supply 23; the second end of the isolating switch circuit 13 is connected to the first end of the manual switch circuit 15; the second end of the manual switch circuit 15 is connected to the first end of the blocking circuit 25 and the first end of the shut-off circuit 27 respectively, and the third end is used to connect to the positive terminal of the high voltage source; the second end of the blocking circuit 25 is connected to the first end of the energy storage circuit 17; the first end of the turn-on circuit 19 is connected to the second end of the energy storage circuit 17, the second end is connected to the first end of the electronic switch 21 and the second end of the shut-off circuit 27 respectively, the third end is connected to the third end of the shut-off circuit 27, the second end of the electronic switch 21 and the third end of the energy storage circuit 17 respectively, and is used to connect to the negative terminal of the high voltage source; the third end of the electronic switch 21 is connected to the second end of the auxiliary power supply 23; the third end of the auxiliary power supply 23 is connected to the positive terminal of the high voltage source.

[0041] The control circuit 11 provides control signals to the isolating switch circuit 13, enabling the isolating switch circuit 13 to control the manual switch circuit 15 to lock in the on state, or to control 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 MCUs are not excluded from implementing the control circuit 11.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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 2 As 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.

[0048] Resistors R6, R7, R8, R9, R10, and R11 are connected in sequence; the first end of resistor R6 is connected to the positive terminal of the high voltage source and the third terminal of auxiliary power supply 23, and 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).

[0049] 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., pin 4 of relay RLY); the first end of resistor R17 is used to connect the first end of blocking circuit 25 and the first end of shut-off circuit 27.

[0050] The primary function of the blocking circuit 25 is to limit sudden current surges, prevent overvoltage and overcurrent, and ensure smooth circuit startup. For example, through combinations of components such as resistors, capacitors, or diodes, the blocking circuit 25 can slow down the current rise rate (e.g., RC time constant control), absorb energy when the switching transistor is turned off (e.g., clamping circuits), or block AC signal interference (e.g., capacitors blocking DC). Its core function is to protect sensitive components from transient shocks and prevent equipment damage caused by large current surges, thereby improving system reliability and safety. The blocking circuit 25 can be implemented in various ways, such as... Figure 2As shown, in one example, a feasible approach is provided where the blocking circuit 25 includes a diode D2; the anode of the diode D2 is connected to the first terminal of the resistor R17 and the first terminal of the shutdown circuit 27, respectively, and the cathode is connected to the first terminal of the energy storage circuit 17.

[0051] The main function of the turn-on circuit 19 is to provide the initial startup voltage to the system and control the on / off state of circuit 11 to ensure a smooth system startup. Its functions include: 1) limiting the startup current through high-value resistors or capacitors to prevent overcurrent surges; 2) gradually building up the voltage using the energy storage characteristics of capacitors to avoid the switching devices being subjected to instantaneous high voltage; and 3) determining whether the system is turned on through control signals (such as enable signals) to achieve precise control. The turn-on circuit 19 can be implemented in various ways, such as... Figure 2 As shown, in one example, a feasible approach is provided whereby the turn-on circuit 19 includes resistors R18, R19, R20, R21, MOSFET Q3, capacitor C5, and Zener diode Z1.

[0052] The source of MOSFET Q3 is connected to the first terminal of resistor R18 and the second terminal of energy storage circuit 17, respectively; the gate of MOSFET Q3 is connected to the second terminal of resistor R18 and the cathode of Zener diode Z1, respectively, and the drain is connected to the first terminal of resistor R19.

[0053] The first end of resistor R20 is connected to the second end of resistor R19 and the second end of the shut-off circuit 27. The second end is connected to the first end of capacitor C5, the first end of resistor R21 and the first end of electronic switch 21.

[0054] The anode of Zener diode Z1, the second terminal of capacitor C5, the second terminal of resistor R21, the third terminal of turn-off circuit 27, and the third terminal of energy storage circuit 17 are connected and used to connect to the negative terminal of high voltage source.

[0055] The shutdown circuit 27 is mainly used to protect the system from abnormal effects such as overvoltage and overcurrent when the circuit is disconnected. The shutdown circuit 27 can be implemented in various ways, such as... Figure 2 As shown, in one example, a feasible approach is provided where the shutdown circuit 27 includes a transistor Q4; the base of the transistor Q4 is connected to the second terminal of the manual switch circuit 15 and the first terminal of the blocking circuit 25, the collector is connected to the second terminal of the resistor R19 and the first terminal of the resistor R20, and the emitter is connected to the anode of the Zener diode Z1, the second terminal of the capacitor C5, the second terminal of the resistor R21, and the third terminal of the energy storage circuit 17.

[0056] 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 the electronic switch 21 includes an insulated-gate bipolar transistor (IGBT) Q5; the gate of the IGBT Q5 is connected to an on-circuit 19, the emitter is connected to the negative terminal of a high-voltage source, and the collector is connected to an auxiliary power supply 23.

[0057] The core function of the energy storage circuit 17 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 17 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 17 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 17 includes a Zener diode Z2 and a capacitor C6; the cathode of the Zener diode Z2 is connected to the first terminal of the capacitor C6, the second terminal of the blocking circuit 25, and the first terminal of the turn-on circuit 19, respectively; the anode of the Zener diode Z2 is connected to the second terminal of the capacitor C6 and the third terminal of the turn-on circuit 19, respectively, and is used as the negative terminal of the high-voltage source.

[0058] 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 isolation circuit 25, an on-circuit circuit 19, an energy storage circuit 17, an off-circuit circuit 27, an electronic switch 21, and an auxiliary power supply 23.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] The blocking circuit 25 includes diode D2; the turning-on circuit 19 includes resistors R18, R19, R20, and R21, MOSFET Q3, capacitor C5, and Zener diode Z1. The turning-off circuit 27 includes transistor Q4; the electronic switch 21 includes insulated-gate bipolar transistor Q5; and the energy storage circuit 17 includes Zener diode Z2 and capacitor C6.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Resistors R6, R7, R8, R9, R10, and R11 are connected in sequence; the first end of resistor R6 is connected to the positive terminal of the high-voltage source and the third terminal of the auxiliary power supply 23, and 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 disconnect switch.

[0067] 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; the first end of resistor R17 is connected to the anode of diode D2.

[0068] The anode of diode D2 is connected to the first terminal of resistor R17 and the base of MOSFET Q3, while the cathode is connected to the cathode of Zener diode Z2 and the first terminal of capacitor C6.

[0069] The source of MOSFET Q3 is connected to the first terminal of resistor R18, the cathode of Zener diode Z1, and the first terminal of capacitor C6, respectively; the gate of MOSFET Q3 is connected to the second terminal of resistor R18 and the cathode of Zener diode Z1, respectively, and the drain is connected to the first terminal of resistor R19.

[0070] The first end of resistor R20 is connected to the second end of resistor R19 and the collector of MOSFET Q3. The second end is connected to the first end of capacitor C5, the first end of resistor R21 and the base of insulated gate bipolar transistor Q5.

[0071] The anode of Zener diode Z1, the second terminal of capacitor C5 and the second terminal of resistor R21, the emitter of insulated gate bipolar transistor Q5, the anode of Zener diode Z2 and the second terminal of capacitor C6 are used to connect to the negative terminal of the high voltage source.

[0072] The base of transistor Q4 is connected to the first terminal of resistor R17 and the anode of diode D2, respectively. The collector is connected to the second terminal of resistor R19 and the first terminal of resistor R20, respectively. The emitter is connected to the anode of Zener diode Z1, the second terminal of capacitor C5, the second terminal of resistor R21, the anode of Zener diode Z2, and the second terminal of capacitor C6, respectively.

[0073] The gate of the insulated gate bipolar transistor Q5 is connected to the second terminal of resistor R20, the first terminal of capacitor C5, and the first terminal of resistor R21, 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.

[0074] The cathode of Zener diode Z2 is connected to the first terminal of capacitor C6, the cathode of diode D2, the first terminal of resistor R18, and the source of MOSFET Q3, respectively; the anode of Zener diode Z2 is connected to the second terminal of capacitor C6, the anode of Zener diode Z1, the emitter of transistor Q4, the second terminal of capacitor C5, and the second terminal of resistor R21, and is used as the negative terminal of the high voltage source.

[0075] The energy storage start-up circuit of this application includes a control circuit 11, an isolating switch circuit 13, a manual switch circuit 15, a blocking circuit 25, a turn-on circuit 19, an energy storage circuit 17, a turn-off circuit 27, an electronic switch 21, and an auxiliary power supply 23. The energy storage start-up circuit of this application 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 17 through the manual switch circuit 15. When the voltage of the energy storage circuit 17 reaches threshold 1, the turn-off circuit 27 is blocked; when the voltage of the energy storage circuit 17 reaches threshold 2, the turn-on circuit 19 is quickly turned on, 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 circuit 13 is turned on, thereby locking the manual switch circuit 15 and continuously connecting the positive terminal of the high-voltage power supply to the energy storage circuit 17, keeping the electronic switch 21 in a conducting state. At this time, the manual switch circuit 15 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 17. The voltage of the blocking circuit 25 drops rapidly below the threshold 1, causing the shutdown circuit 27 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 17 and the auxiliary power supply 23, which could lead to the energy storage circuit 17 being damaged by power depletion. In addition, this application does not require a high-voltage switch, making its implementation less expensive than existing technologies.

[0076] In one embodiment, a device is provided, including the aforementioned energy storage startup 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 startup circuit, the device also includes other corresponding components. Because the energy storage startup circuit of this application achieves automatic switch reset, it avoids the inability to disconnect the connection between the energy storage circuit 17 and the auxiliary power supply 23, preventing the energy storage circuit 17 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.

[0077] 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.

[0078] 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, isolating switch circuits, manual switch circuits, blocking circuits, turning-on circuits, energy storage circuits, turning-off 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 blocking circuit and the first terminal of the shutdown circuit respectively, and the third terminal is used to connect to the positive terminal of the high voltage source; the second terminal of the blocking circuit is connected to the first terminal of the energy storage circuit. The first end of the turn-on circuit is connected to the second end of the energy storage circuit, the second end is connected to the first end of the electronic switch and the second end of the turn-off circuit, and the third end is connected to the third end of the turn-off circuit, the second end of the electronic switch and the third end of the energy storage circuit, and is used to connect to the negative terminal of the high-voltage source. The third terminal of the electronic switch is connected to the second terminal of the auxiliary power supply; the third terminal 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, 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.

3. The energy storage start-up circuit according to claim 2, 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.

4. The energy storage start-up circuit according to claim 1, characterized in that, The manual switch circuit includes resistors R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, and 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 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 disconnect switch. The resistors R12, R13, R14, R15, R16, and R17 are connected in sequence; the first end of the resistor R12 is connected to the second end of the manual switch SW; the second end of the manual switch SW is connected to the isolating switch; the first end of the resistor R17 is used to connect the first end of the blocking circuit and the first end of the shut-off circuit.

5. The energy storage start-up circuit according to claim 4, characterized in that, The blocking circuit includes a diode D2; the anode of the diode D2 is connected to the first terminal of the resistor R17 and the first terminal of the shutdown circuit, respectively, and the cathode is connected to the first terminal of the energy storage circuit.

6. The energy storage start-up circuit according to claim 1, characterized in that, The turn-on circuit includes resistors R18, R19, R20, and R21, MOSFET Q3, capacitor C5, and Zener diode Z1. The source of the MOSFET Q3 is connected to the first terminal of the resistor R18 and the second terminal of the energy storage circuit, respectively; the gate of the MOSFET Q3 is connected to the second terminal of the resistor R18 and the cathode of the Zener diode Z1, respectively; and the drain is connected to the first terminal of the resistor R19 and the second terminal of the turn-off circuit. The first end of the resistor R20 is connected to the second end of the resistor R19 and the second end of the shutdown circuit, and the second end is connected to the first end of the capacitor C5, the first end of the resistor R21 and the first end of the electronic switch respectively. The anode of the Zener diode Z1, the second terminal of the capacitor C5, the second terminal of the resistor R21, the third terminal of the shutdown circuit, and the third terminal of the energy storage circuit are connected and 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 shutdown circuit includes a transistor Q4; the base of the transistor Q4 is connected to the second terminal of the manual switch circuit and the first terminal of the blocking circuit, the collector is connected to the second terminal of the resistor R19 and the first terminal of the resistor R20, and the emitter is connected to the anode of the Zener diode Z1, the second terminal of the capacitor C5, the second terminal of the resistor R21 and the third terminal of the energy storage circuit.

8. The energy storage start-up circuit according to claim 1, 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 turn-on circuit, 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.

9. The energy storage start-up circuit according to claim 1, characterized in that, The energy storage circuit includes a Zener diode Z2 and a capacitor C6; The cathode of the Zener diode Z2 is connected to the first terminal of the capacitor C6, the second terminal of the blocking circuit, and the first terminal of the turn-on circuit, respectively; the anode of the Zener diode Z2 is connected to the second terminal of the capacitor C6 and the third terminal of the turn-on circuit, respectively, and is used as the negative terminal of the high voltage source.

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

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