A discharge circuit and an energy storage circuit

Abstract

The application provides a discharge circuit and an energy storage circuit, relates to the technical field of energy storage and discharge, and the circuit comprises a slow power-on control unit, an energy storage unit, a start-stop control unit, a first switching device and a first electric control device; the start-stop control unit is connected with the control end of the slow power-on control unit and the control end of the first switching device; the first port of the slow power-on control unit is connected with the first port of the first electric control device; the second port of the slow power-on control unit is connected with the energy storage unit; the second port of the first electric control device is grounded; and the control end of the first electric control device is connected with the output end of the switching unit. The application only discharges when the start-stop control unit sends a high-level signal to the slow power-on control unit and the first switching device, thereby avoiding the situation of randomly discharging the energy storage device, reducing the damage of the circuit, and improving the reliability of the discharge circuit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage discharge, in particular to a discharge circuit and an energy storage circuit. BACKGROUND

[0002] With the continuous development of science and technology, more and more energy storage devices are applied in the industrial field. In order to ensure the safe use of these energy storage devices, it is necessary to regularly overhaul and maintain these energy storage devices. Before the overhaul and maintenance, the energy storage devices need to be discharged first to avoid the situation that the maintenance personnel is electrically shocked. When the existing discharge circuit is used to discharge the energy storage device, since the existing discharge circuit does not have a discharge start-stop identification function, only by connecting the discharge circuit to the energy storage device to realize the discharge, the existing discharge circuit is easy to discharge the energy storage device when the energy storage device does not need to be discharged, which causes safety hazards in the discharge process and easily causes circuit damage, thereby seriously reducing the reliability of the discharge circuit. SUMMARY

[0003] The present application provides a discharge circuit and an energy storage circuit to solve the technical problem that the existing discharge circuit does not have a discharge start-stop identification function, which causes safety hazards in the discharge process, easily causes circuit damage, and reduces the reliability of the discharge circuit.

[0004] In order to achieve the above purpose, the technical scheme adopted by the embodiments of the present application is as follows:

[0005] In a first aspect, the present application provides a discharge circuit, comprising: a slow power-on control unit, an energy storage unit, a start-stop control unit, a switching unit and a main loop control unit; wherein the switching unit comprises a first switching device; the main loop control unit comprises a first electric control device;

[0006] The start-stop control unit is connected with the control end of the slow power-on control unit and the control end of the first switching device, the first port of the slow power-on control unit is connected with the first port of the controlled system of the first electric control device, the second port of the slow power-on control unit is connected with the energy storage unit, the second port of the controlled system of the first electric control device is grounded, the control end of the first electric control device is connected with the output end of the first switching device; the first port of the first switching device is externally connected with a direct current power supply;

[0007] The start-stop control unit is configured to output a high-level signal to a control end of the slow power-on control unit to control the first port and the second port of the slow power-on control unit to be conductive when a signal of starting discharge is received; the start-stop control unit is configured to output a high-level signal to a control end of the first switch device to make the first switch device in an open state and make the first switch device output a low-level signal to a control system of the first electric control device when the signal of starting discharge is received; and the first electric control device is configured to control the first port and the second port of the controlled system to be conductive when the control system receives the low-level signal, so that the energy storage unit is discharged through the slow power-on control unit and the main loop control unit.

[0008] Further, the embodiment of the present application provides a first possible implementation manner of the first aspect, wherein the discharge circuit further comprises: a shutdown discharge unit.

[0009] A connection line between the first port of the slow power-on control unit and the first port of the controlled system in the first electric control device is provided with the shutdown discharge unit; and the shutdown discharge unit is configured to limit current.

[0010] The embodiment of the present application provides a discharge circuit, which comprises a slow power-on control unit, an energy storage unit, a start-stop control unit, a switching unit and a main loop control unit; wherein the switching unit comprises a first switching device; the main loop control unit comprises a first electric control device; the start-stop control unit is connected with the control end of the slow power-on control unit and the control end of the first switching device; the first port of the slow power-on control unit is connected with the first port of the controlled system of the first electric control device; the second port of the slow power-on control unit is connected with the energy storage unit; the second port of the controlled system of the first electric control device is grounded; the control end of the first electric control device is connected with the output end of the first switching device; the first port of the first switching device is externally connected with a direct current power supply; the start-stop control unit is used for outputting a high level signal to the control end of the slow power-on control unit when a signal of starting discharge is received, so as to control the first port and the second port of the slow power-on control unit to be turned on; the start-stop control unit is used for outputting a high level signal to the control end of the first switching device when the signal of starting discharge is received, so as to make the first switching device be in an off state and make the first switching device output a low level signal to the control system of the first electric control device; the first electric control device is used for controlling the first port and the second port of the controlled system to be turned on when the control system receives the low level signal, so as to make the energy storage unit discharge through the slow power-on control unit and the main loop control unit. The high level signal is outputted to the control end of the slow power-on control unit and the control end of the first switching device by the start-stop control unit, the discharge circuit starts to discharge the energy storage unit, the control end of the slow power-on control unit controls the first port and the second port of the slow power-on control unit to be turned on when the high level signal is received; the first switching device is used for being in the off state when the control end receives the high level signal, the first switching device outputs a low level signal to the control end of the first electric control device when the first switching device is in the off state, so as to make the first port and the second port of the controlled system of the first electric control device be turned on, the energy storage unit discharges through the slow power-on control unit and the first electric control device, the discharge circuit provided by the embodiment of the present application only discharges when the high level signal is outputted by the start-stop control unit, and only discharges when the first port and the second port of the slow power-on control unit and the first port and the second port of the first electric control device are all turned on, so that the situation that the discharge circuit randomly discharges the energy storage device is avoided, the safety hidden danger in the discharge process is reduced, the circuit damage situation is reduced, and the reliability of the discharge circuit is improved.

[0011] In the second aspect, the embodiment of the present application also provides an energy storage circuit, which comprises a power supply input interface, a slow power-on unit, an output interface and the above discharge circuit.

[0012] The power supply input interface is connected with an input end of the slow boot unit, an output end of the slow boot unit is connected with a third port of the slow boot control unit; an output end of the energy storage unit is connected with the output interface; wherein the slow boot unit is used for current limiting;

[0013] The start-stop control unit is used for outputting a low level signal to a control end of the slow boot control unit when receiving a signal of stopping discharging and starting charging, so as to control the second port and the third port of the slow boot control unit to be conductive, so that the power supply input interface charges the energy storage unit through the slow boot unit and the slow boot control unit.

[0014] Further, the embodiment of the present application provides a first possible implementation manner of the second aspect, wherein the switch unit further comprises: a first optoelectronic coupler;

[0015] An anode of a light emitting diode in the first optoelectronic coupler is connected with the energy storage unit, a cathode of the light emitting diode in the first optoelectronic coupler is connected with a third port of the controlled system of the first electric control device, an emitter of a photo triode in the first optoelectronic coupler is connected with a direct current power supply, and a collector of the photo triode in the first optoelectronic coupler is grounded;

[0016] The start-stop control unit is used for outputting a low level signal to a control end of the first switch device when receiving a signal of stopping discharging and starting charging, so as to make the first switch device in a conductive state and make the first switch device output a high level signal to the control system of the first electric control device; the first electric control device is used for controlling the second port and the third port of the controlled system to be conductive when the control system receives the high level signal, so as to make the light emitting diode in the first optoelectronic coupler have current flowing through, and trigger the photo triode in the first optoelectronic coupler to be conductive.

[0017] Further, the embodiment of the present application provides a second possible implementation manner of the second aspect, wherein the slow boot control unit comprises: a second switch device and a second electric control device;

[0018] A control end of the second switch device is connected with the start-stop control unit, a first port of the second switch device is connected with a direct current power supply, and an output end of the second switch device is connected with a control system of the second electric control device;

[0019] The second switch device is used for being in an open state when the control end receives a high level signal, and outputting a low level signal to the control system of the second electric control device; the second switch device is used for being in a closed state when the control end receives a low level signal, and outputting a high level signal to the control system of the second electric control device;

[0020] The first port of the controlled system of the second electric control device is connected with the first port of the controlled system of the first electric control device, the second port of the controlled system of the second electric control device is connected with the port of the energy storage unit, and the third port of the controlled system of the second electric control device is connected with the output end of the slow boot unit.

[0021] The second electric control device is configured to control the first port and the second port of the controlled system to be conductive when the control system receives a low-level signal, and the second electric control device is configured to control the second port and the third port of the controlled system to be conductive when the control system receives a high-level signal.

[0022] Further, the embodiment of the present application provides a third possible implementation manner of the second aspect, wherein the energy storage circuit further comprises a protection unit.

[0023] The input end of the protection unit is connected with the power supply input interface, and the output end of the protection unit is connected with the input end of the slow boot unit.

[0024] Further, the embodiment of the present application provides a fourth possible implementation manner of the second aspect, wherein the energy storage circuit further comprises a filter unit.

[0025] The input end of the filter unit is connected with the power supply input interface, the output end of the filter unit is connected with the input end of the slow boot unit, and the filter unit is connected with the protection unit in parallel.

[0026] Further, the embodiment of the present application provides a fifth possible implementation manner of the second aspect, wherein the energy storage circuit further comprises a power-down holding unit.

[0027] The power-down holding unit is connected with the power supply input interface and the port of the energy storage unit.

[0028] The power-down holding unit is configured to store voltage when the energy storage unit is charging.

[0029] Further, the embodiment of the present application provides a sixth possible implementation manner of the second aspect, wherein the energy storage circuit further comprises an auxiliary power supply output interface.

[0030] One end of the auxiliary power supply output interface is connected with the power-down holding unit, and the other end of the auxiliary power supply output interface is configured to be connected with an external auxiliary power supply.

[0031] The power-down holding unit is further configured to provide delay power supply for the external auxiliary power supply through the auxiliary power supply output interface when the energy storage unit releases electric energy.

[0032] Further, the embodiment of the present application provides a seventh possible implementation manner of the second aspect, wherein the energy storage circuit further comprises a state output unit;

[0033] The control end of the state output unit is connected with the output end of the switch unit.

[0034] The switch unit is configured to output a high level signal to the state output unit after the energy storage unit completes energy storage; and the state output unit is configured to output a signal indicating that the energy storage unit completes energy storage when the control end receives the high level signal.

[0035] The embodiment of the present application further provides an energy storage circuit, comprising a power supply input interface, a slow power-on unit, an output interface and the above-mentioned discharge circuit; the power supply input interface is connected with the input end of the slow power-on unit; the output end of the slow power-on unit is connected with the third port of the slow power-on control unit; the output end of the energy storage unit is connected with the output interface; wherein the slow power-on unit is configured to limit current; the start-stop control unit is configured to output a low level signal to the control end of the slow power-on control unit when receiving a signal indicating that the discharge of the energy storage assembly is stopped and the charging is started, so as to control the first port and the third port of the slow power-on control unit to be conductive, so that the power supply input interface charges the energy storage unit through the slow power-on unit and the slow power-on control unit. The energy storage circuit provided by the present application outputs a low level signal to the control end of the slow power-on control unit through the start-stop control unit when the energy storage assembly stops discharging and starts charging, so as to make the second port and the third port of the slow power-on control unit conductive, thereby making the power supply input interface charge the energy storage unit through the slow power-on unit and the slow power-on control unit. Only when the start-stop control unit outputs a low level signal can the energy storage unit be charged, so that the starting time of charging can be accurately controlled. By setting the slow power-on unit to limit the current size in the charging circuit, the situation of sudden change of voltage across the energy storage unit during charging is avoided, the capacitor in the energy storage unit is prevented from being damaged, and the reliability of the energy storage circuit is improved. For details, refer to the beneficial effects of the above-mentioned discharge circuit, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0037] Figure 1 A circuit module schematic diagram of a discharge circuit provided by the embodiment of the present application;

[0038] Figure 2 A circuit schematic diagram of a discharge circuit and an energy storage circuit provided by the embodiment of the present application;

[0039] Figure 3 A unit schematic diagram of a discharge circuit and an energy storage circuit provided by an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described below with reference to the drawings. Obviously, the described embodiments are some but not all of the embodiments of the present application.

[0041] The present embodiment provides a discharge circuit, referring to Figure 1 a circuit module schematic diagram of a discharge circuit, the discharge circuit mainly comprises a slow power-on control unit 13, an energy storage unit 14, a start-stop control unit 15, a switching unit 21 and a main loop control unit 22; wherein the switching unit 21 comprises a first switching device; the main loop control unit 22 comprises a first electric control device;

[0042] The control end of the start-stop control unit 15 and the control end of the slow power-on control unit 13 are connected, the first port of the slow power-on control unit 13 is connected with the controlled system of the first electric control device, the second port of the slow power-on control unit 13 is connected with the energy storage unit 14, the second port of the controlled system of the first electric control device is grounded, the control end of the first electric control device is connected with the output end of the first switching device; the first port of the first switching device is externally connected with a direct current power supply;

[0043] The start-stop control unit 15 is used for outputting a high level signal to the control end of the slow power-on control unit 13 and the control end of the switching unit 21 to control the first port and the second port of the slow power-on control unit 13 to be conductive when receiving a signal of starting discharge; the start-stop control unit 15 is used for outputting a high level signal to the control end of the first switching device to make the first switching device in an open state and make the first switching device output a low level signal to the control system of the first electric control device when receiving the signal of starting discharge; the first electric control device is used for controlling the first port and the second port of the controlled system to be conductive to make the energy storage unit 14 discharge through the slow power-on control unit 13 and the main loop control unit 22 when the control system receives the low level signal.

[0044] The start-stop control unit 15 is configured to receive a start-stop signal from an external control system board and output a level signal to the control end of the slow power-on control unit 13 and the switch unit 21 (i.e. the control end of the first switch device) according to the received start-stop signal. When the external control system board sends a signal to control the discharge of the energy storage unit 14, the start-stop control unit 15 outputs a high level signal to the control end of the slow power-on control unit 13 to control the first port and the second port of the slow power-on control unit 13 to be conductive. The start-stop control unit 15 outputs a high level signal to the control end of the switch unit 21 to control the switch unit 21 to be in an open state. When the switch unit 21 is in the open state, the switch unit 21 is configured to output a low level signal to the main circuit control unit 22 (i.e. the control system of the first electric control device) to make the first port and the second port of the main circuit control unit 22 (i.e. the first port and the second port of the controlled system of the first electric control device) conductive, so that the energy storage unit 14 directly discharges through the slow power-on control unit 13 and the main circuit control unit 22;

[0045] Referring to Figure 2 The first switch device is a PNP transistor Q201, and the first electric control device is a relay K201. The start-stop control unit 15 can receive a start-stop signal from an external control system board through the start-stop control transmission device JP202 and output a level signal to the control end of the slow power-on control unit 13 and the first switch device according to the received start-stop signal. When the external control system board sends a signal to control the discharge of the energy storage unit 14, the start-stop control transmission device JP202 outputs a high level signal to the control end of the slow power-on control unit 13 to control the first port and the second port of the slow power-on control unit 13 to be conductive.

[0046] The control system in the first electric control device is a coil formed by connecting the pin 1 and the pin 2 of the relay K201. The control end of the first switch device is the base B of the PNP transistor Q201. The first port of the first switch device is the emitter E of the PNP transistor Q201. The output end of the first switch device is the collector C of the PNP transistor Q201. The base of the PNP transistor Q201 is connected to the start-stop control unit 15. The emitter of the PNP transistor Q201 is connected to a DC power supply VCC. The collector of the PNP transistor Q201 is connected to the pin 2 of the relay K201. The pin 1 of the relay K201 is grounded.

[0047] When the control end of the first switch device (i.e. the base B of the PNP transistor Q201) receives a high level signal, the first switch device will be in an open state. At this time, the output end of the first switch device (i.e. the collector C of the PNP transistor Q201) will output a low level signal to the control system of the first electric control device.

[0048] The first port of the controlled system of the first electric control device is pin 3 of the relay K201, and the second port of the controlled system of the first electric control device is pin 5 of the relay K201; the first electric control device is used to control the first port and the second port of the controlled system to be conductive (i.e., control pin 3 and pin 5 of the relay K201 to be conductive) when the control system receives a low-level signal;

[0049] The main loop control unit 22 further comprises a diode D203 and a resistor R217, one end of the resistor R217 is grounded, the other end is connected with pin 5, pin 1 of the relay K201 and the anode of the diode D203, the cathode of the diode D203 is connected with pin 2 of the relay K201, wherein the diode D203 and the resistor R217 play a role in noise reduction and current limiting;

[0050] When the energy storage unit 14 needs to be discharged, the start-stop control transmission device JP202 transmits a high-level signal to the base of the PNP transistor Q201, the PNP transistor Q201 is cut off, and the PNP transistor Q201 will not send any level signal (i.e., a low-level signal) to pin 2 of the relay K201, at this time, the control system in the relay K201 (i.e., no current flows through the coil composed of pin 1 and pin 2), the pin 3 and pin 5 of the controlled system in the relay are conductive, so that the energy storage unit 14 can be discharged through the pin 3 and pin 5 of the relay;

[0051] The first port (pin 1) of the start-stop control transmission device JP202 is connected with the control end of the slow power-on control unit 13 and the base of the PNP transistor Q201, and the second port (pin 2) of the start-stop control transmission device JP202 is grounded; the start-stop control unit 15 further comprises a resistor R204, one end of the resistor R204 is connected with the first port (pin 1) of the start-stop control transmission device JP202, and the other end is connected with the direct current power supply VCC, and the resistor R204 is used to clamp the output signal of the start-stop control transmission device JP202.

[0052] The discharge circuit provided in this embodiment of the invention outputs a high-level signal to the control terminal of the slow-on control unit and the control terminal of the first switching device (the control terminal of the switching unit) through the start-stop control unit, thereby controlling the discharge circuit to start discharging the energy storage unit. When the control terminal of the slow-on control unit receives the high-level signal, it controls the first port and the second port of the slow-on control unit to be turned on. The first switching device is used to be in the off state when the control terminal receives the high-level signal. When the first switching device is in the off state, it outputs a low-level signal to the control terminal of the first electrical control device (i.e., the main circuit control unit), so that the first port and the second port of the controlled system of the first electrical control device are turned on. The energy storage unit discharges through the slow-on control unit and the main circuit control unit of the first electrical control device. The discharge circuit provided in this embodiment of the invention will only discharge when the start-stop control unit sends a high-level signal, and will only discharge when the first port and the second port of the slow-on control unit and the first port and the second port of the first electrical control device are both turned on. This avoids the situation where the discharge circuit discharges randomly to the energy storage device, reduces the safety hazards in the discharge process, reduces the possibility of circuit damage, and improves the reliability of the discharge circuit.

[0053] In one embodiment, see Figure 3 The diagram shows a discharge circuit and an energy storage circuit. The discharge circuit provided in this embodiment further includes a discharge shutdown unit 20.

[0054] A discharge unit 20 is provided on the connection line between the first port of the power-on control unit 13 and the first port of the controlled system in the first electrical controller; the discharge unit 20 is used for current limiting.

[0055] like Figure 2 As shown, the shutdown discharge unit 20 includes resistors R209, R210 and R211 connected in series. One end of resistor R209 is connected to the first port of the power-on control unit 13, and one end of resistor R211 is connected to the first port of the controlled system in the first electrical control device (i.e., the first port of the main circuit control unit 22). By setting resistors R209, R210 and R211 to limit the current in the circuit, the current in the circuit is limited to avoid the situation where the current in the circuit is too large during the discharge process, which may cause the device to be damaged.

[0056] This invention also provides an energy storage circuit, such as... Figure 3 As shown, the energy storage circuit includes: a power supply input interface 11, a soft power-on unit 12, an output interface 19, and the aforementioned discharge circuit;

[0057] The power supply input interface 11 is connected with the input end of the slow boot unit 12, the output end of the slow boot unit 12 is connected with the third port of the slow boot control unit 13; the output end of the energy storage unit 14 is connected with the output interface 19; wherein, the slow boot unit 12 is used for current limiting;

[0058] The start-stop control unit 15 is used for outputting a low-level signal to the control end of the slow boot control unit 13 when receiving a signal of stopping discharging and starting charging, so as to control the second port and the third port of the slow boot control unit 13 to be conductive, so that the power supply input interface 11 charges the energy storage unit 14 through the slow boot unit 12 and the slow boot control unit 13;

[0059] As shown in Figure 2 The power supply input interface 11 can supply power to the energy storage discharge circuit by connecting the power supply JP201, and the power supply JP201 is usually a direct current power supply, and the power supply voltage value can be 24V, and the positive electrode (pin 1) of the power supply JP201 is connected with the power supply input interface 11, and the negative electrode (pin 2) is grounded; the power supply JP201 can supply power to the energy storage unit 14 through the power supply input interface 11 and the slow boot unit 12, in order to avoid the problem of damage of the energy storage unit 14 caused by voltage mutation of the energy storage unit 14 in the stage of stopping discharging and starting charging of the energy storage circuit, the slow boot unit 12 is arranged in the energy storage circuit, specifically, the slow boot unit 12 includes resistors R201, R202 and R203 connected in series, one end of the resistor R201 is connected with the power supply input interface 11, and one end of the resistor R203 is connected with the first port of the slow boot control unit 13, the resistors R201, R202 and R203 are arranged to limit the current, so as to avoid the burning of the energy storage unit 14 caused by excessive current; first, the start-stop control unit 15 outputs a low-level signal to the control end of the slow boot unit 12.

[0060] The energy storage circuit provided by the embodiment of the application outputs a low-level signal to the control end of the slow boot control unit through the start-stop control unit when the energy storage assembly stops discharging and starts charging, so as to make the second port and the third port of the slow boot control unit conductive, so that the power supply input interface charges the energy storage unit through the slow boot unit and the slow boot control unit, and only when the start-stop control unit outputs a low-level signal can the energy storage unit be charged, so as to accurately control the starting time of charging, and by arranging the slow boot unit to limit the current size in the charging circuit, the situation of voltage mutation of the energy storage unit is avoided in the process of charging, the damage of the capacitor in the energy storage unit is avoided, the reliability of the energy storage circuit is improved, and the beneficial effects of the above-mentioned discharge circuit are specifically described and will not be repeated here.

[0061] In one embodiment, as shown in Figure 2 The switch unit provided by the embodiment further includes: a first optoelectronic coupler U202;

[0062] Anode of the light emitting diode in the first optocoupler U202 is connected with the energy storage unit 14, cathode of the light emitting diode in the first optocoupler U202 is connected with the third port of the controlled system of the first electric control device, emitter of the photo triode in the first optocoupler U202 is connected with the DC power supply, collector of the photo triode in the first optocoupler U202 is grounded;

[0063] The start-stop control unit 15 is configured to output a low-level signal to the control end of the first switching device when receiving a signal of stopping discharging and starting charging, so that the first switching device is in a conductive state, and the first switching device outputs a high-level signal to the control system of the first electric control device; the first electric control device is configured to control the second port and the third port of the controlled system to be conductive when the control system receives the high-level signal, so that the light emitting diode in the first optocoupler U202 has current flowing through, and the photo triode in the first optocoupler U202 is triggered to be conductive;

[0064] The anode of the light emitting diode in the first optocoupler U202 (i.e. pin 1 of the first optocoupler U202) is connected with the second port of the slow power-on control unit 13 (i.e. pin 5 of the relay K202), the cathode of the light emitting diode in the first optocoupler U202 (i.e. pin 2 of the first optocoupler U202) is connected with the third port of the main loop control unit 22 (i.e. pin 4 of the relay K201), the emitter of the photo triode in the first optocoupler U202 (i.e. pin 4 of the first optocoupler U202) is connected with the DC power supply, and the collector of the photo triode in the first optocoupler U202 (i.e. pin 3 of the first optocoupler U202) is grounded; the light emitting diode in the first optocoupler U202 emits light when current flows through, and the photo triode in the first optocoupler U202 is conductive when the light source irradiates the photo triode in the first optocoupler U202.

[0065] In one embodiment, the slow power-on control unit 13 includes a second switching device and a second electric control device.

[0066] As shown in Figure 2 , the second switching device is a PNP triode Q203, and the second electric control device is a relay K202.

[0067] The control end of the second switching device is connected with the start-stop control unit 15, the first port of the second switching device is connected with the DC power supply, and the output end of the second switching device is connected with the control system of the second electric control device;

[0068] The control system in the second electric control device is a coil composed of pin 1 and pin 2 of the relay K202;

[0069] The control end of the second switching device (i.e. the base B of the PNP transistor Q203) is connected with the pin 1 of the start-stop control transmission device JP202 in the start-stop control unit 15, the first port of the second switching device (i.e. the emitter E of the PNP transistor Q203) is externally connected with the direct current power supply, and the output end of the second switching device (i.e. the collector C of the PNP transistor Q203) is connected with the control system of the second electric control device (i.e. the pin 2 of the relay K202), and the pin 1 of the relay K202 is grounded.

[0070] The slow power-on control unit 13 further comprises a stabilizing diode D204, a diode 205, a resistor R220, a resistor R221, a resistor R222 and a capacitor C204. The anode of the stabilizing diode D204 is connected with the pin 1 of the start-stop control transmission device JP202 in the start-stop control unit 15, the cathode of the stabilizing diode D204 is connected with one end of the resistor R220 and one end of the capacitor C204, the other end of the capacitor C204 is connected with the emitter of the PNP transistor Q203, the other end of the resistor R220 is connected with one end of the resistor R221 and the base of the PNP transistor Q203, the other end of the resistor R221 is connected with the emitter of the PNP transistor Q203, one end of the resistor R222 is grounded, and the other end is connected with the pin 2 of the relay K202 and the anode of the diode 205, and the cathode of the diode 205 is connected with the pin 1 of the relay K202. The stabilizing diode D204, the diode 205, the resistor R220, the resistor R221, the resistor R222 and the capacitor C204 have the functions of stabilizing voltage, limiting current, filtering, reducing noise and the like.

[0071] The second switching device is in an open state when the control end receives a high-level signal, and outputs a low-level signal to the control system of the second electric control device; the second switching device is in a closed state when the control end receives a low-level signal, and outputs a high-level signal to the control system of the second electric control device.

[0072] When the base of the PNP transistor Q203 receives a high-level signal, the emitter voltage is not greater than the base voltage due to the external connection of the direct current voltage, so the PNP transistor Q203 is cut off, and the collector of the PNP transistor Q203 outputs a 0 voltage signal (i.e. a low-level signal) to the control system of the second electric control device (i.e. the pin 1 of the relay K202); when the base of the PNP transistor Q203 receives a low-level signal, the emitter voltage of the PNP transistor Q203 is greater than the base voltage due to the external connection of the direct current voltage, so the PNP transistor Q203 is turned on, and the collector of the PNP transistor Q203 outputs a high-level signal to the pin 1 of the relay K202.

[0073] The first port of the controlled system of the second electric control device is connected with the first port of the controlled system of the first electric control device of the main circuit control unit 22, the second port of the controlled system of the second electric control device is connected with the port of the energy storage unit 14, and the third port of the controlled system of the second electric control device is connected with the output end of the slow power-on unit 12.

[0074] The second electric control device is used for controlling the first port and the second port of the controlled system to be conductive when the control system receives a low-level signal; and the second electric control device is used for controlling the second port and the third port of the controlled system to be conductive when the control system receives a high-level signal.

[0075] The first port of the controlled system in the second electric control device (i.e. the pin 3 of the relay K202) is connected with the first port of the main circuit control unit 22, specifically, the first port of the controlled system in the second electric control device (i.e. the pin 3 of the relay K202) is connected with the first port of the controlled system of the first electric control device (i.e. the pin 3 of the relay K201), and the second port of the controlled system in the second electric control device (i.e. the pin 5 of the relay K202) is connected with the port of the energy storage unit 14; the third port of the controlled system of the second electric control device (i.e. the pin 4 of the relay K202) is connected with the output end (i.e. one end of the resistor R203) of the slow power-on unit 12.

[0076] The control system (i.e. the coil composed of the pin 1 and the pin 2 in the relay K202) in the relay K202 has no current flowing therethrough when receiving a low-level signal of the second switch device, the pin 3 and the pin 5 of the relay K202 are attracted, so that the first port and the second port of the second electric control device are conductive; the control system (i.e. the coil composed of the pin 1 and the pin 2 in the relay K202) in the relay K202 has current flowing therethrough when receiving a high-level signal of the second switch device, so that the pin 4 of the relay K202 is attracted to the pin 5, so that the second port and the third port of the second electric control device are conductive.

[0077] The energy storage circuit provided by the embodiment of the application further comprises a sampling unit 16, a detection unit 17 and a main circuit switch unit 18.

[0078] The sampling unit 16 is connected with the input end of the detection unit 17, the output end of the detection unit 17 is connected with the control end of the switch unit 21, the control end of the main circuit switch unit 18 is connected with the output end of the main circuit control unit 22, the input end of the main circuit switch unit 18 is connected with the power supply input interface 11, and the output end of the main circuit switch unit 18 is connected with the port of the energy storage unit 14; wherein, the main circuit switch unit 18 is in a disconnected state.

[0079] The sampling unit 16 is used for detecting the voltage of the energy storage unit 14; the detection unit 17 is used for outputting a low-level signal to the switch unit 21 when the voltage of the energy storage unit 14 is greater than a preset voltage threshold; the switch unit 21 is used for triggering the main loop switch unit 18 to conduct when the low-level signal is received, so that the power supply input interface 11 directly charges the energy storage unit 14 through the main loop switch unit 18; specifically, the sampling unit 16 collects the storage voltage of the energy storage unit 14 in real time, and delivers the voltage to the input end of the detection unit 17, and only when the voltage of the energy storage unit 14 received by the detection unit 17 is greater than the preset voltage threshold, a low-level signal is output, thereby triggering the main loop switch unit 18 to conduct, so that the power supply input interface 11 charges the energy storage unit 14 through the main loop switch unit 18; that is, in the energy storage starting stage, the power supply cannot directly supply power to the energy storage unit 14, and needs to be charged to the energy storage unit 14 through the slow charging unit 12 and the slow charging control unit 13; when the voltage of the energy storage unit 14 is greater than the preset voltage threshold, the main loop switch unit 18 is controlled to conduct, so that the power supply directly supplies power to the energy storage unit 14;

[0080] The energy storage circuit provided by the embodiment of the application charges the energy storage unit 14 through the slow charging unit 12 when the voltage of the energy storage unit 14 is low, avoids the voltage of the energy storage unit 14 from being suddenly changed and damaged, and has the function of slow charging. The voltage stored in the energy storage unit 14 is collected in real time based on the collection unit, and when the voltage of the energy storage unit 14 is greater than a preset voltage threshold (the preset voltage threshold can be determined according to the voltage of the semiconductor load connected to the output interface 19 and the voltage of the power supply, specifically, the preset voltage threshold is less than the voltage of the power supply and greater than the voltage of the semiconductor load, for example, the voltage of the semiconductor load is 20V, the voltage of the power supply is 24V, and the preset voltage threshold can be set to 22V), the main loop switch unit 18 is controlled to conduct, so that the power supply input interface 11 directly charges the energy storage unit 14 through the main loop switch unit 18. During the charging process of the energy storage unit 14, the main loop switch unit 18 can only be conducted when the start-stop control unit 15 outputs a low-level signal and the detection unit 17 also outputs a low-level signal. Double protection is provided when the main loop is switched, the start-stop control unit 15 and the detection unit 17 realize the "and" control of the main loop switch unit 18, the problem of "misoperation" protection of the power supply caused by the large switching voltage difference in the process of switching the main loop is avoided, and the reliability of the energy storage circuit is improved.

[0081] As Figure 2As shown, the sampling unit 16 includes resistors R205, R206, R207, R208, and capacitor C201; the detection unit 17 includes voltage comparator U201, diode D201, resistor R212, resistor R213, resistor R214, capacitor C202, and voltage stabilizing chip IC201; the main circuit switch unit 18 includes third switch device (i.e., N-type field effect transistor M201), second optocoupler U203, resistor R223, and capacitor C205; the switch unit 21 further includes voltage stabilizing diode D202, resistor R215, resistor R216, resistor R224, and capacitor C203;

[0082] One end of the sampling unit 16 is connected with the port of the energy storage unit 14, and the other end is connected with the input end of the detection unit 17 (i.e., V in), the sampling unit 16 is used for collecting the voltage stored by the energy storage unit 14 in real time, and transmitting the collected voltage of the energy storage unit 14 to the detection unit 17, one end of the resistor R205 in the sampling unit 16 is connected with the port of the energy storage unit 14, and the other end is connected with one end of the resistor R206, the other end of the resistor R206 is connected with one end of the resistor R207, one end of the resistor R208, and one end of the capacitor C201, the other ends of the resistor R204 and the capacitor C201 are grounded, and the other end of the resistor R208 is connected with the inverting input end (i.e., pin 2) of the voltage comparator U201, wherein the resistor R205, the resistor R206, and the resistor R208 play a current limiting role, the resistor R207 is used for voltage stabilization, and the capacitor C201 is used for filtering;

[0083] One end of the diode D201 in the detection unit 17 is connected with the pin 1 of the start-stop control transmission device JP202 in the start-stop control unit 15, and the other end is connected with the non-inverting input end (i.e., pin 3) of the voltage comparator U201 and one end of the resistor R212, the other end of the resistor R212 is connected with one end of the resistor R213, one end of the resistor R214, one end of the capacitor C202, pin 1 and pin 2 of the voltage stabilizing chip IC201, the other end of the resistor R213, the other end of the capacitor C202, and pin 3 of the voltage stabilizing chip IC201 are grounded, and the other end of the resistor R214 is connected with the pin 4 of the voltage comparator U201, wherein the voltage stabilizing chip IC201 plays a role of stabilizing the input voltage of the non-inverting input end of the voltage comparator U201, wherein the diode D201, the resistor R212, the resistor R213, the resistor R214, and the capacitor C202 play roles of current limiting, filtering, noise reduction, etc.; the output end (pin 1) of the voltage comparator U201 is connected with the control end (i.e., base B of PNP triode Q201) of the first switch device in the switch unit 21;

[0084] The voltage comparator U201 outputs a low level signal when the voltage received at the inverting input is greater than the voltage received at the non-inverting input, and outputs a high level signal when the voltage received at the inverting input is less than or equal to the voltage received at the non-inverting input, and the voltage comparator U201 turns on the main circuit switch unit 18 when outputting a low level signal, the pin 4 of the voltage comparator U201 is connected to a direct current voltage VCC, the pin 5 of the voltage comparator U201 is grounded, and the pin 4 and the pin 5 of the voltage comparator U201 form a loop to supply power to the voltage comparator U201;

[0085] The cathode of the voltage stabilizing diode D202 in the switch unit 21 is connected to the output (i.e. pin 1) of the voltage comparator U201, the anode of the voltage stabilizing diode D202 is connected to one end of the resistor R215 and one end of the capacitor C203, the other end of the capacitor C203 is connected to the emitter of the PNP triode Q201, the other end of the resistor R215 is connected to one end of the resistor R216 and the base of the PNP triode Q201, the other end of the resistor R216 is connected to the emitter of the PNP triode Q201, one end of the resistor R224 is connected to the positive electrode of the light emitting diode in the first optoelectronic coupler U202, and the other end is connected to the second port of the slow power-on control unit 13, the negative electrode (i.e. pin 2 of the optoelectronic coupler) of the light emitting diode in the first optoelectronic coupler U202 is connected to the third port (i.e. pin 4 of the relay K201) of the controlled system in the first electrical control device, and a resistor R225 is arranged on the connection line, the positive electrode (i.e. pin 1 of the first optoelectronic coupler U202) of the light emitting diode in the first optoelectronic coupler U202 is connected to the second port of the slow power-on control unit 13, the emitter (i.e. pin 4 of the first optoelectronic coupler U202) of the photosensitive triode in the first optoelectronic coupler U202 is connected to a direct current power supply VCC, and the collector (i.e. pin 3 of the first optoelectronic coupler U202) of the photosensitive triode in the first optoelectronic coupler U202 is connected to the control end of the main circuit switch unit 18; wherein the voltage stabilizing diode D202, the resistor R215, the resistor R216, the resistor R224 and the capacitor C203 have the functions of voltage stabilization, current limiting and filtering, etc.

[0086] When the output of voltage comparator U201 outputs a high-level signal to the control terminal of PNP transistor Q201, it proves that the voltage stored in energy storage unit 14 is not yet greater than the preset voltage threshold (i.e., the low-level signal issued by start / stop control unit 15). PNP transistor Q201 is in the off state and cannot trigger the main circuit switch unit 18 to turn on. However, when the voltage stored in energy storage unit 14 is greater than the preset voltage threshold, the output of voltage comparator U201 outputs a low-level signal to the control terminal of PNP transistor Q201. At this time, since the emitter of PNP transistor Q201 is connected to an external DC voltage, the emitter voltage of PNP transistor Q201 is greater than the base voltage. PNP transistor Q201 is in the on state, thereby triggering the main circuit switch unit 18 to turn on. This allows the power supply to directly charge energy storage unit 14 through the main circuit switch unit 18. Since energy storage unit 14 has already stored an appropriate amount of voltage, directly charging energy storage unit 14 at this time will not cause a voltage change in energy storage unit 14.

[0087] When no current flows through the control system coil in relay K201, pins 3 and 5 are connected. However, when the control system of the first electrical control device receives a high-level signal, current flows through the coil in relay K201, which causes pin 4 of relay K201 to be attracted to pin 5, making the first port and the second port of the first electrical control device connected, so that the light-emitting diode of the first optocoupler U202 is turned on.

[0088] When the light-emitting diode of the first optocoupler U202 is turned on, the light-emitting diode will generate light energy. When the light energy shines on the phototransistor of the first optocoupler U202, the phototransistor will be turned on. The collector of the phototransistor will transmit a high-level signal to the main circuit switching unit 18, so that the main circuit switching unit 18 is turned on.

[0089] The cathode of the light-emitting diode in the second optoelectronic coupler U203 in the main loop switching unit 18, i.e. pin 2 of the second optoelectronic coupler U203, is grounded, the anode of the light-emitting diode in the second optoelectronic coupler U203, i.e. pin 1 of the second optoelectronic coupler U203, is connected to one end of the resistor R223, the other end of the resistor R223 is connected to pin 3 of the first optoelectronic coupler U202 and one end of the capacitor C205, the other end of the capacitor C205 is connected to pin 2 of the second optoelectronic coupler U203, the emitter of the phototriode in the second optoelectronic coupler U203, i.e. pin 4 of the second optoelectronic coupler U203, is connected to the control end of the third switching device, i.e. the gate of the N-type field effect transistor M201, the collector of the phototriode in the second optoelectronic coupler U203, i.e. pin 3 of the second optoelectronic coupler U203, is connected to the port of the energy storage unit 14 and the output end of the third switching device, i.e. the drain of the N-type field effect transistor M201, the input end of the third switching device, i.e. the source of the N-type field effect transistor M201, is connected to the power supply input interface 11, and the light-emitting diode in the second optoelectronic coupler U203 generates a light source when a current flows through it, and when the light source irradiates the phototriode of the second optoelectronic coupler U203, the phototriode is turned on, so that the source and drain of the N-type field effect transistor M201 are turned on, so that the power supply input interface 11 can directly supply power to the energy storage unit 14.

[0090] In one embodiment, as shown in Figure 3 the energy storage circuit provided by the embodiment further comprises a protection unit 27;

[0091] The input end of the protection unit 27 is connected to the power supply input interface 11, and the output end of the protection unit 27 is connected to the input end of the slow boot unit 12.

[0092] As shown in Figure 2 the protection unit 27 comprises a fuse F202 and a voltage-dependent resistor R226, one end of the fuse F202 is connected to pin 1 of the power supply JP201, the other end is connected to one end of the voltage-dependent resistor R226, the other end of the voltage-dependent resistor R226 is connected to pin 2 of the power supply JP201; the fuse F202 is used to fuse when the current in the power supply line is too large, and the voltage-dependent resistor R226 is used to clamp the voltage when the voltage in the power supply line is too large, and the fuse F202 and the voltage-dependent resistor R226 together provide voltage and current protection for the energy storage circuit.

[0093] In one embodiment, as shown in Figure 3 the energy storage circuit provided by the embodiment further comprises a filter unit 26;

[0094] The input end of the filtering unit 26 is connected with the power supply input interface 11, the output end of the filtering unit 26 is connected with the input end of the buffer power-on unit 12, and the filtering unit 26 is connected with the protection unit 27 in parallel;

[0095] As shown in Figure 2 , the filtering unit 26 comprises a capacitor C229, one end of the capacitor C229 is connected with the pin 1 of the power supply JP201, the other end is connected with the pin 2 of the power supply JP201, and the capacitor C229 is connected with the protection unit 27 in parallel, and the filtering unit 26 is used for filtering the current in the main loop circuit.

[0096] In one embodiment, as shown in Figure 3 , the energy storage circuit provided by the embodiment further comprises a power-off holding unit 24.

[0097] The power-off holding unit 24 is connected with the power supply input interface 11 and the port of the energy storage unit 14.

[0098] The power-off holding unit 24 is used for storing voltage when the energy storage unit 14 is charging.

[0099] As shown in Figure 2 , the power-off holding unit 24 comprises a diode D206, a diode D207, a capacitor C206 and a capacitor C207, the anode of the diode D206 is connected with the pin 1 of the power supply JP201, the cathode is connected with one end of the capacitor C206, one end of the capacitor C207 and the cathode of the diode D207, the other end of the capacitor C206 and the other end of the capacitor C207 are both grounded, and the anode of the diode D207 is connected with the port of the energy storage unit 14.

[0100] The capacitor C206 in the power-off holding unit 24 is a polarized capacitor, which stores the voltage provided by the power supply when the energy storage unit 14 is charging, and when the energy storage unit 14 releases the electric energy, the electric energy stored by the power-off holding unit 24 can still power the external control system board, avoiding the damage of the external control system board.

[0101] In one embodiment, as shown in Figure 3 , the energy storage circuit provided by the embodiment further comprises an auxiliary power supply output interface 25.

[0102] One end of the auxiliary power supply output interface 25 is connected with the power-off holding unit 24, and the other end of the auxiliary power supply output interface 25 is used for externally connecting an auxiliary power supply.

[0103] The power-off holding unit 24 is further used for providing delay power supply for the externally connected auxiliary power supply through the auxiliary power supply output interface 25 when the energy storage unit 14 releases the electric energy.

[0104] As shown in Figure 2As shown, the auxiliary power output interface 25 can be connected to an external auxiliary power supply JP204 to power the external control system board. Pin 1 of the auxiliary power supply JP204 is connected to one end of the fuse F201, and the other end of the fuse F201 is connected to the anode of the capacitor C206 in the power-down retention unit 24. Pin 2 of the auxiliary power supply JP204 is grounded. When the energy storage unit 14 releases electrical energy, the capacitor C206 in the power-down retention unit 24 provides delayed power to the auxiliary power supply JP204 through the auxiliary power output interface 25. The auxiliary power supply JP204 powers the external control system board, ensuring that the external control system board can still be used normally.

[0105] In one embodiment, such as Figure 3 As shown, the energy storage circuit provided in this embodiment further includes: a status output unit 23;

[0106] The control terminal of the status output unit 23 is connected to the output terminal of the switch unit 21;

[0107] Switching unit 21 is used to output a high-level signal to status output unit 23 after energy storage unit 14 has completed energy storage; status output unit 23 is used to output a signal that energy storage unit 14 has completed energy storage when the control terminal receives a high-level signal.

[0108] like Figure 2 As shown, the status output unit 23 includes: a status output interface, resistors R218 and R219, and an NPN transistor Q202. The status output interface can transmit the energy storage status of the energy storage unit 14 to an external control system board by connecting to the status transmission device JP203. Pin 1 of the status transmission device JP203 is connected to the collector C of the NPN transistor Q202. The emitter E of the NPN transistor Q202 is grounded. The base B of the NPN transistor Q202 is connected to one end of resistor R218 and one end of resistor R219. The other end of resistor R218 is connected to the emitter of the NPN transistor Q202. The other end of resistor R218 is connected to the collector of the phototransistor in the first optocoupler U202.

[0109] When the collector of the phototransistor in the first optocoupler U202 outputs a high-level signal, it proves that the energy storage unit 14 has met the energy storage requirements, and the status output unit 23 will output a signal that the energy storage unit 14 has completed energy storage to the external control system board.

[0110] In embodiments of the present invention, such as Figure 2As shown, the energy storage unit 14 can be composed of a plurality of polarized capacitors. The energy storage unit 14 composed of the capacitors can store 81.6Mf of electric charge. The energy storage unit 14 includes: the anodes of the capacitors C208, C209, C210, C211, C212, C213, C214, C215, C216, C217, C218 and C219 connected in parallel together as the port of the energy storage unit 14, the cathodes of the capacitors C208, C209, C210, C211, C212, C213, C214, C215, C216, C217, C218 and C219 connected in parallel together to ground, and the energy storage unit 14 is provided with a plurality of output interfaces 19, connected with the load JP205, the load JP206 and the load JP207. The pin 1 of the load JP205 is connected with the anode of the capacitor C208, the pin 2 of the load JP205 is grounded, and the anode of the capacitor C209 is connected with the capacitor C220. The pin 1 of the load JP206 is connected with the anode of the capacitor C212, the pin 2 of the load JP206 is grounded, and the anode of the capacitor C213 is connected with the capacitor C221. The pin 1 of the load JP207 is connected with the anode of the capacitor C216, the pin 2 of the load JP207 is grounded, and the anode of the capacitor C217 is connected with the capacitor C222. The anode of the capacitor C210 is connected with the capacitor C223 and then grounded. The anode of the capacitor C211 is connected with the capacitor C224 and then grounded. The anode of the capacitor C214 is connected with the capacitor C225 and then grounded. The anode of the capacitor C215 is connected with the capacitor C226 and then grounded. The anode of the capacitor C218 is connected with the capacitor C227 and then grounded. The anode of the capacitor C219 is connected with the capacitor C228 and then grounded. The capacitors C220, C221, C222, C223, C224, C225, C226, C227 and C228 serve as filters.

[0111] In the embodiment of the present application, a specific implementation of the energy storage and discharge by the discharge circuit and the energy storage circuit is provided as follows.

[0112] When the discharge circuit and the energy storage circuit need to store energy, the start-stop control unit 15 receives the start charging signal of the external control system board, outputs a low-level signal to the same-phase input end of the buffer power-on control unit 13 and the detection unit 17, and accesses the 24V DC power supply at the power supply input interface 11. At this time, the PNP transistor Q203 in the buffer power-on control unit 13 is turned on, the coil of the relay K202 has current flowing through it, the pin 4 and the pin 5 of the relay K202 are turned on, the power supply JP201 supplies power to the energy storage unit 14 through the buffer power-on unit 12, and the purpose of buffer power-on is achieved. When the voltage received by the anti-phase input end of the detection unit 17 is greater than the low-level signal output by the start-stop control unit 15 (i.e., the voltage of the energy storage unit 14 reaches 22V), it indicates that the voltage stored in the energy storage unit 14 reaches the requirement. At this time, the power supply of the energy storage unit 14 to the load is 20V, the detection unit 17 outputs a low-level signal to the switch unit 21, at this time the PNP transistor Q201 in the switch unit 21 is turned on, so that the coil of the relay K201 has current flowing through it, the pin 4 and the pin 5 of the relay K201 are turned on, the light-emitting diode of the first optocoupler U202 is turned on, and the photo-sensitive triode is turned on. At this time, the source and the drain of the N-type field effect transistor M201 in the main loop switch unit 18 are also turned on, so that the power supply JP201 can directly supply power to the energy storage unit 14, and the NPN transistor Q202 in the state output unit 23 outputs an energy storage completion signal to the external control system board. The power supply during the energy storage process changes from the original traditional multi-path power supply to single-path power supply, the number and size of the power supply are reduced, the device wiring is more simple, and the interference source is also reduced accordingly.

[0113] When the discharge circuit and energy storage circuit need to discharge, the start / stop control unit 15 receives a stop charging signal from the external control system board and outputs a high-level signal to the non-inverting input terminals of the soft-on control unit 13 and the detection unit 17. At this time, the PNP transistor Q203 in the soft-on control unit 13 is cut off, no current flows through the coil of the relay K202, and pins 3 and 5 of the relay K202 are connected. The voltage at the inverting input terminal of the detection unit 17 is less than the voltage at the non-inverting input terminal of the detection unit 17, and the detection unit 17 outputs a high-level signal to the PNP transistor Q201 in the switching unit 21. At this time, the PNP transistor Q201 is cut off, no current flows through the coil of the relay K201, and pins 3 and 5 of the relay K201 are connected. The light-emitting diode of the first optocoupler U202 is cut off, and the discharge unit 20 is turned off. The "OR" control between the power-on control unit 13 and the main circuit control unit 22 allows the power supply unit to directly release energy through the shutdown discharge unit 20 during the discharge process, greatly shortening the discharge time and enhancing the safety and reliability of the discharge circuit and energy storage circuit after power failure. When the voltage in the energy storage unit 14 drops to 20V, the load is shut off. At this time, the power-off retention unit 24 supplies power to the auxiliary power supply through the auxiliary power output interface 25 to maintain the delayed power supply of the external control system board and keep it in normal condition. When the voltage in the energy storage unit 14 drops to 9V, if the external control system board sends a signal to control the power failure, the power supply of the external control system board will not be affected by the presence of the power-off retention unit 24. If the power supply JP201 is cut off, the load has already been shut off, and the entire discharge circuit, energy storage circuit, and external control system board have been safely shut down.

[0114] In this embodiment of the invention, the slow power-on control unit 13 in the discharge circuit and energy storage circuit can also be replaced by using multiplex control to implement combinational logic or timing circuit control of the slow power-on control unit such as "AND, OR, NOR".

[0115] The output signal of the power-on control unit 13 and the output signal of the main circuit control unit 22 are used to perform "OR" control on the power-off discharge unit 20. Alternatively, multiplex control can be used to implement combination logic or timing circuit control of "AND, NAND, OR" for the power-off discharge unit.

[0116] The provided "OR NOT" control of the shutdown discharge unit by the output signal of the power-on control unit and the output signal of the main circuit control unit 22 can also be replaced by using multiple control to realize the combination logic or timing circuit control of the shutdown discharge unit by "AND, NAND, OR" or other combinations.

[0117] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or device must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0118] In the description of the present application, it should be noted that unless otherwise specified and limited, the term "mounting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two devices. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0119] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A discharge circuit, characterized in that, include: The system includes a power-on control unit, an energy storage unit, a start / stop control unit, a switching unit, and a main circuit control unit; wherein the switching unit includes a first switching device; and the main circuit control unit includes a first electrical control device. The start / stop control unit is connected to the control terminal of the soft power-on control unit and the control terminal of the first switching device. The first port of the soft power-on control unit is connected to the first port of the controlled system of the first electrical control device. The second port of the soft power-on control unit is connected to the energy storage unit. The second port of the controlled system of the first electrical control device is grounded. The control terminal of the first electrical control device is connected to the output terminal of the first switching device. The first port of the first switching device is connected to an external DC power supply. The start-stop control unit is used to output a high-level signal to the control terminal of the slow-on control unit when it receives a signal to start discharging, so as to control the first port and the second port of the slow-on control unit to be turned on; the start-stop control unit is used to output a high-level signal to the control terminal of the first switching device when it receives a signal to start discharging, so as to put the first switching device in an off state, and to make the first switching device output a low-level signal to the control system of the first electrical control device; the first electrical control device is used to control the first port and the second port of the controlled system to be turned on when the control system receives a low-level signal, so as to enable the energy storage unit to discharge through the slow-on control unit and the main circuit control unit.

2. The discharge circuit according to claim 1, characterized in that, Also includes: Shut down the discharge unit; The shutdown discharge unit is provided on the connection line between the first port of the power-on control unit and the first port of the controlled system in the first electrical controller; the shutdown discharge unit is used for current limiting.

3. An energy storage circuit, characterized in that, The energy storage circuit includes: a power supply input interface, a soft power-on unit, an output interface, and a discharge circuit as described in any one of claims 1-2; The power supply input interface is connected to the input terminal of the slow power-on unit, and the output terminal of the slow power-on unit is connected to the third port of the slow power-on control unit; the output terminal of the energy storage unit is connected to the output interface; wherein, the slow power-on unit is used for current limiting; The start / stop control unit is used to output a low-level signal to the control terminal of the slow power-on control unit when it receives a signal to stop discharging and start charging, so as to control the second port and the third port of the slow power-on control unit to be turned on, so that the power supply input interface charges the energy storage unit through the slow power-on unit and the slow power-on control unit.

4. The energy storage circuit according to claim 3, characterized in that, The switching unit further includes: a first optocoupler; The anode of the light-emitting diode in the first optocoupler is connected to the energy storage unit, the cathode of the light-emitting diode in the first optocoupler is connected to the third port of the controlled system of the first electrical control device, the emitter of the phototransistor in the first optocoupler is connected to an external DC power supply, and the collector of the phototransistor in the first optocoupler is grounded. The start / stop control unit is used to output a low-level signal to the control terminal of the first switching device when it receives a signal to stop discharging and start charging, so that the first switching device is in the conducting state, and to make the first switching device output a high-level signal to the control system of the first electrical control device; the first electrical control device is used to control the second port and the third port of the controlled system to be turned on when the control system receives the high-level signal, so that current flows through the light-emitting diode in the first optocoupler, triggering the phototransistor in the first optocoupler to be turned on.

5. The energy storage circuit according to claim 3, characterized in that, The power-on control unit includes: a second switching device and a second electrical control device; The control terminal of the second switching device is connected to the start / stop control unit, the first port of the second switching device is connected to an external DC power supply, and the output terminal of the second switching device is connected to the control system of the second electrical control device. The second switching device is configured to be in an open state when a high-level signal is received at the control terminal, and to output a low-level signal to the control system of the second electrical control device; the second switching device is configured to be in a closed state when a low-level signal is received at the control terminal, and to output a high-level signal to the control system of the second electrical control device. The first port of the controlled system of the second electrical control device is connected to the first port of the controlled system of the first electrical control device, the second port of the controlled system of the second electrical control device is connected to the port of the energy storage unit, and the third port of the controlled system of the second electrical control device is connected to the output terminal of the power-on unit. The second electrical control device is used to control the second port of the controlled system to be turned on when the control system receives a low-level signal; the second electrical control device is used to control the second port of the controlled system to be turned on when the control system receives a high-level signal.

6. The energy storage circuit according to claim 3, characterized in that, Also includes: Protection unit; The input terminal of the protection unit is connected to the power supply input interface, and the output terminal of the protection unit is connected to the input terminal of the power-on buffer unit.

7. The energy storage circuit according to claim 6, characterized in that, Also includes: Filtering unit; The input terminal of the filtering unit is connected to the power supply input interface, the output terminal of the filtering unit is connected to the input terminal of the power-on buffer unit, and the filtering unit is connected in parallel with the protection unit.

8. The energy storage circuit according to claim 6, characterized in that, Also includes: Power-off retention unit; The power-off retention unit is connected to the power input interface and the port of the energy storage unit; The power-down retention unit is used to store voltage when the energy storage unit is charging.

9. The energy storage circuit according to claim 8, characterized in that, Also includes: Auxiliary power output interface; One end of the auxiliary power output interface is connected to the power-off retention unit; the other end of the auxiliary power output interface is used to connect an external auxiliary power supply. The power-off retention unit is also used to provide delayed power supply to the external auxiliary power supply through the auxiliary power output interface when the energy storage unit releases electrical energy.

10. The energy storage circuit according to claim 6, characterized in that, It also includes: a status output unit; The control terminal of the status output unit is connected to the output terminal of the switch unit; The switching unit is used to output a high-level signal to the status output unit after the energy storage unit has completed energy storage; the status output unit is used to output a signal that the energy storage unit has completed energy storage when the control terminal receives a high-level signal.

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