CN112952979A - Low-voltage direct-current redundant power supply control system - Google Patents
Low-voltage direct-current redundant power supply control system Download PDFInfo
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- CN112952979A CN112952979A CN202011634223.5A CN202011634223A CN112952979A CN 112952979 A CN112952979 A CN 112952979A CN 202011634223 A CN202011634223 A CN 202011634223A CN 112952979 A CN112952979 A CN 112952979A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
Abstract
The invention provides a low-voltage direct-current redundant power supply control system which comprises a transformer T1, a rectifying circuit Z1, a main power supply circuit, a storage battery BAT, a storage battery charging management circuit, a storage battery switching control circuit, a first relay, a second relay and a storage battery reverse connection detection control circuit, wherein the transformer T1 is connected with the rectifying circuit Z1; the normally closed switch K1 of the first relay is arranged in an electrifying loop of a primary winding of the transformer T1, the normally closed switch K2 of the second relay is arranged between a secondary winding of the transformer T1 and the ground, and the storage battery reverse connection detection control circuit is used for detecting whether the storage battery is reversely connected and controlling the first relay and the second relay to be disconnected; the positive output end of the secondary winding of the transformer T1 is connected with the input end of a rectifying circuit Z1, the output end of the rectifying circuit Z1 is connected with the input end of a main power supply circuit, and the output end of the main power supply circuit supplies power to a load; the input end of the storage battery switching control circuit is connected to the anode of the storage battery BAT, the output end of the storage battery switching control circuit supplies power to the load, and the control input end of the storage battery switching control circuit is connected with the detection output end of the main power supply circuit.
Description
Technical Field
The invention relates to a power supply control system, in particular to a low-voltage direct-current redundant power supply control system.
Background
In the direct current power supply, a transformer is generally adopted to step down and rectify the mains supply and then supply the voltage to a subsequent load, in the case of mains supply, however, there are unstable conditions, such as overvoltage, power failure, etc., during the supply, in which case overvoltage protection is required to switch the supply of mains supply, however, after the power is cut off, continuous data needs to be acquired in real time during the period of sensors in the internet of things, and once the power supply is interrupted, the data is interrupted, thereby influencing the monitoring and control of the Internet of things, in the prior art, the storage battery and the commercial power are often adopted to form redundant power supply, however, the existing redundant power supply control system based on the storage battery is often complex in circuit structure, has the phenomenon of switching and locking, cannot automatically complete the conversion between the storage battery and the commercial power, although there are circuits capable of switching, these circuits often depend on a control chip, and the circuit structure is complicated.
On the other hand, the storage battery is used as a part of a redundant power supply system, and the storage battery is often in a reverse connection risk, the reverse connection of the storage battery cannot enable the whole system to work normally, and the high voltage generated when the storage battery is electrified can impact the secondary winding of the transformer in a reverse direction, so that high self-induced electromotive force is generated on the secondary winding, the secondary winding is burnt, even a subsequent circuit is endangered, and the whole system is damaged and crashed.
Disclosure of Invention
In view of the above, the low-voltage dc redundant power supply control system provided by the invention can be switched to the storage battery for power supply in real time when the mains supply fails in the low-voltage dc power supply process, and is automatically switched to the mains supply for power supply after the mains supply is recovered, so that the power supply stability of the low-voltage dc electric device can be ensured, and accurate detection and immediate protection can be performed when the storage battery is reversely connected, thereby effectively ensuring the safety of the whole system.
The invention provides a low-voltage direct-current redundant power supply control system which comprises a transformer T1, a rectifying circuit Z1, a main power supply circuit, a storage battery BAT, a storage battery charging management circuit, a storage battery switching control circuit, a first relay, a second relay and a storage battery reverse connection detection control circuit, wherein the transformer T1 is connected with the rectifying circuit Z1;
the first relay and the second relay are normally closed relays;
the normally closed switch K1 of the first relay is arranged in an electrifying loop of a primary winding of the transformer T1, the normally closed switch K2 of the second relay is arranged between a secondary winding of the transformer T1 and the ground, and the storage battery reverse connection detection control circuit is used for detecting whether the storage battery is reversely connected and controlling the first relay and the second relay to be disconnected;
the positive output end of the secondary winding of the transformer T1 is connected with the input end of a rectifying circuit Z1, the output end of the rectifying circuit Z1 is connected with the input end of a main power supply circuit, and the output end of the main power supply circuit supplies power to a load;
the input end of the storage battery charging management circuit is connected with the output end of the rectifying circuit, and the charging output end of the storage battery charging management circuit is connected with the anode of the storage battery BAT;
the input end of the storage battery switching control circuit is connected to the anode of the storage battery BAT, the output end of the storage battery switching control circuit supplies power to the load, and the control input end of the storage battery switching control circuit is connected with the detection output end of the main power supply circuit.
Further, the main power supply circuit comprises an overvoltage detection circuit, a PMOS tube Q3 and a first MOS tube control circuit;
the drain electrode of PMOS pipe Q3 passes through electric capacity C5 ground connection, and PMOS pipe Q3 drain electrode is as main power supply circuit's output, and PMOS pipe Q3's source electrode is as main power supply circuit's input, and PMOS pipe Q3's grid is connected in first MOS pipe control circuit's control output, and first MOS pipe control circuit's detection output end is connected with battery switching control circuit's control input, overvoltage detection circuit's detection input end is connected in PMOS pipe Q3's source electrode, and overvoltage detection circuit's control output end is connected in first MOS pipe control circuit's control input end.
Further, the first MOS transistor control circuit includes a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a transistor Q5, a transistor Q4, and a capacitor C4;
one end of the resistor R9 is connected to the source of the PMOS transistor Q3, the other end of the resistor R9 is connected in parallel with the capacitor C4 through a resistor R10 and then grounded, a common connection point of the resistor R9 and the resistor R10 is connected to the base of the triode Q5 through a resistor R6, the emitter of the triode Q5 is grounded, the collector of the triode Q5 is connected in series with the source of the PMOS transistor Q3 through a resistor R7 and a resistor R8, the common connection point of the resistor R7 and the resistor R8 serves as a control output end of the first MOS transistor control circuit, the collector of the triode Q4 is connected to the common connection point of the resistor R9 and the resistor R10, the emitter of the triode Q4 is grounded, the base of the triode Q4 serves as a control input end of the first MOS transistor control circuit, and the common connection point of the resistor R9 and the resistor R10.
Further, the overvoltage detection circuit comprises a resistor R4, a resistor R5, a capacitor C3, a capacitor C6, a voltage regulator tube D1 and a voltage regulator tube D2;
one end of a resistor R4 is connected to the output end of the direct-current power supply, the other end of the resistor R4 is grounded through a resistor R5, a common connection point between a resistor R4 and the output end of the direct-current power supply is grounded through a capacitor C3, a common connection point between a resistor R4 and a resistor R5 is connected with the negative electrode of a voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is connected with the positive electrode of a voltage regulator tube D2, the negative electrode of the voltage regulator tube D2 serves as the control output end of the overvoltage detection circuit, and the positive electrode of the voltage regulator tube D1 is grounded through a capacitor.
Further, the storage battery switching control circuit comprises a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a PMOS tube Q1 and a PMOS tube Q2;
the source of the PMOS transistor Q1 is connected to the positive electrode of the battery BAT as the input terminal of the battery switching control circuit, the drain of the PMOS transistor Q1 is connected to the load as the output terminal of the battery switching control circuit, the source of the PMOS transistor Q1 is grounded through a capacitor C1, the source of the PMOS transistor Q1 is connected to the gate of the PMOS transistor Q1 through a resistor R1, the gate of the PMOS transistor Q1 is grounded through a capacitor C2, the gate of the PMOS transistor Q1 is connected to the emitter of the transistor Q2 through a resistor R2, the collector of the transistor Q2 is grounded, the base of the transistor Q2 is connected to one end of the resistor R3, and the other end of the resistor R3 is used as the control input terminal of the battery switching control circuit.
Further, the storage battery reverse connection detection control circuit comprises a resistor R11, a resistor R12, a resistor R13, a triode Q6, a triode Q7, a light emitting diode LED, a voltage regulator tube D3 and a voltage regulator tube D4;
the negative electrode of the voltage regulator tube D3 is connected to the source electrode of the PMOS tube Q1, the positive electrode of the voltage regulator tube D3 is connected to the negative electrode of the LED, and the positive electrode of the LED is grounded through a resistor R11;
the positive pole of the light emitting diode LED is connected with the base electrodes of a triode Q6 and a triode Q7, the collector electrodes of a triode Q6 and a triode Q7 are grounded, the emitter electrode of a triode Q6 is connected with one end of a magnet exciting coil L1 of a first relay through a resistor R13, the other end of the magnet exciting coil L1 of the first relay is connected with the positive pole of a voltage regulator tube D4, the negative pole of a voltage regulator tube D4 is connected with the negative pole of a voltage regulator tube D3, the emitter electrode of a triode Q7 is connected with one end of a magnet exciting coil L2 of a second relay through a resistor R12, and the other end of the magnet exciting coil L2 of the second relay is connected with the positive.
Further, the storage battery charging management circuit is a CN3763 chip and peripheral circuits thereof.
The invention has the beneficial effects that: according to the invention, the power supply can be switched to the storage battery in real time under the condition that the mains supply fails in the low-voltage direct-current power supply process, and the power supply can be automatically switched to the mains supply after the mains supply is recovered, so that the power supply stability of the low-voltage direct-current power utilization device can be ensured, and the accurate detection and immediate protection can be carried out when the storage battery is reversely connected, thereby effectively ensuring the safety of the whole system.
Drawings
The invention is further described below with reference to the following figures and examples:
fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a circuit schematic of an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings of the specification:
the invention provides a low-voltage direct-current redundant power supply control system which comprises a transformer T1, a rectifying circuit Z1, a main power supply circuit, a storage battery BAT, a storage battery charging management circuit, a storage battery switching control circuit, a first relay, a second relay and a storage battery reverse connection detection control circuit, wherein the transformer T1 is connected with the rectifying circuit Z1;
the first relay and the second relay are normally closed relays;
the normally closed switch K1 of the first relay is arranged in an electrifying loop of a primary winding of the transformer T1, the normally closed switch K2 of the second relay is arranged between a secondary winding of the transformer T1 and the ground, and the storage battery reverse connection detection control circuit is used for detecting whether the storage battery is reversely connected and controlling the first relay and the second relay to be disconnected;
the positive output end of the secondary winding of the transformer T1 is connected with the input end of a rectifying circuit Z1, the output end of the rectifying circuit Z1 is connected with the input end of a main power supply circuit, and the output end of the main power supply circuit supplies power to a load; the positive output end of the rectifying circuit Z1 is also grounded through a capacitor C7 and is used for filtering, and the rectifying circuit adopts a full-bridge rectifying circuit formed by the conventional diodes;
the input end of the storage battery charging management circuit is connected with the output end of the rectifying circuit, and the charging output end of the storage battery charging management circuit is connected with the anode of the storage battery BAT;
the input end of the storage battery switching control circuit is connected to the anode of the storage battery BAT, the output end of the storage battery switching control circuit supplies power to the load, and the control input end of the storage battery switching control circuit is connected with the detection output end of the main power supply circuit. Through the structure, the power supply to the storage battery can be switched in real time under the condition that the commercial power fails in the low-voltage direct-current power supply process, and the power supply to the commercial power supply is automatically switched after the commercial power is recovered, so that the power supply stability of a low-voltage direct-current power utilization device can be ensured, and the storage battery can be accurately detected and immediately protected when reversely connected, so that the safety of the whole system is effectively ensured. The system is also provided with an RC filter circuit and a voltage stabilizing circuit, wherein after the direct current output by the main power supply circuit is filtered through the RC filter circuit, the voltage is stabilized through the voltage stabilizing circuit, and the voltage stabilizing circuit adopts the existing voltage stabilizing chips, such as LM7809, LM7805, AMS1117-3.3 and the like; the rated working voltage of the electric appliance in the actual working condition is achieved, and therefore the safety of the electric appliance is ensured.
In this embodiment, the main power supply circuit includes an overvoltage detection circuit, a PMOS transistor Q3, and a first MOS transistor control circuit;
the drain electrode of PMOS pipe Q3 passes through electric capacity C5 ground connection, and PMOS pipe Q3 drain electrode is as main power supply circuit's output, and PMOS pipe Q3's source electrode is as main power supply circuit's input, and PMOS pipe Q3's grid is connected in first MOS pipe control circuit's control output, and first MOS pipe control circuit's detection output end is connected with battery switching control circuit's control input, overvoltage detection circuit's detection input end is connected in PMOS pipe Q3's source electrode, and overvoltage detection circuit's control output end is connected in first MOS pipe control circuit's control input end.
Specifically, the method comprises the following steps:
the first MOS tube control circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a triode Q5, a triode Q4 and a capacitor C4;
one end of the resistor R9 is connected to the source of the PMOS transistor Q3, the other end of the resistor R9 is connected in parallel with the capacitor C4 through a resistor R10 and then grounded, a common connection point of the resistor R9 and the resistor R10 is connected to the base of the triode Q5 through a resistor R6, the emitter of the triode Q5 is grounded, the collector of the triode Q5 is connected in series with the source of the PMOS transistor Q3 through a resistor R7 and a resistor R8, the common connection point of the resistor R7 and the resistor R8 serves as a control output end of the first MOS transistor control circuit, the collector of the triode Q4 is connected to the common connection point of the resistor R9 and the resistor R10, the emitter of the triode Q4 is grounded, the base of the triode Q4 serves as a control input end of the first MOS transistor control circuit, and the common connection point of the resistor R9 and the resistor R10.
The overvoltage detection circuit comprises a resistor R4, a resistor R5, a capacitor C3, a capacitor C6, a voltage regulator tube D1 and a voltage regulator tube D2;
one end of a resistor R4 is connected to the output end of the direct-current power supply, the other end of the resistor R4 is grounded through a resistor R5, a common connection point between a resistor R4 and the output end of the direct-current power supply is grounded through a capacitor C3, a common connection point between a resistor R4 and a resistor R5 is connected with the negative electrode of a voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is connected with the positive electrode of a voltage regulator tube D2, the negative electrode of the voltage regulator tube D2 serves as the control output end of the overvoltage detection circuit, and the positive electrode of the voltage regulator tube D1 is grounded through a capacitor.
The storage battery switching control circuit comprises a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a PMOS (P-channel metal oxide semiconductor) transistor Q1 and a PMOS transistor Q2;
the source of the PMOS transistor Q1 is connected to the positive electrode of the battery BAT as the input terminal of the battery switching control circuit, the drain of the PMOS transistor Q1 is connected to the load as the output terminal of the battery switching control circuit, the source of the PMOS transistor Q1 is grounded through a capacitor C1, the source of the PMOS transistor Q1 is connected to the gate of the PMOS transistor Q1 through a resistor R1, the gate of the PMOS transistor Q1 is grounded through a capacitor C2, the gate of the PMOS transistor Q1 is connected to the emitter of the transistor Q2 through a resistor R2, the collector of the transistor Q2 is grounded, the base of the transistor Q2 is connected to one end of the resistor R3, and the other end of the resistor R3 is used as the control input terminal of the battery switching control circuit. Under the structure, the power supply between the commercial power and the storage battery can be stably controlled to be freely switched without other chip control, and the circuit structure is stable and reliable.
When the mains supply is normal, the base of the triode Q5 is divided by the resistor R9 and the resistor R10 to supply power, the triode Q5 is switched on, so that the PMOS tube Q3 is switched on, the main power supply circuit supplies power, meanwhile, as the voltage is applied to the base of the triode Q2, the voltage of the emitter of the triode Q2 is smaller than the voltage of the base under the parameter control of the resistor R3, the resistor R2 and the resistor R1, the triode Q2 is cut off, so that the PMOS tube Q1 is cut off, and the storage battery switching control circuit does not supply power to the load;
when the mains supply is interrupted, the common connection point of the resistor R9 and the resistor R10 has no output; when the mains supply has overvoltage, the diode D1 is conducted, the capacitor C6 filters the overvoltage and then applies the overvoltage to the triode Q4, the triode Q4 is conducted, the potential of the common connection point of the resistor R9 and the resistor R10 is pulled low, the base voltage of the triode Q2 is set to be 0 due to the two states, the triode Q2 is conducted, the PMOS tube Q1 is conducted, the storage battery supplies power to the load, and after the mains supply is recovered, the triode Q2 is cut off again, the PMOS tube Q1 is cut off, and therefore automatic switching is completed.
In this embodiment, the storage battery reverse connection detection control circuit includes a resistor R11, a resistor R12, a resistor R13, a triode Q6, a triode Q7, a light emitting diode LED, a voltage regulator tube D3, and a voltage regulator tube D4;
the negative electrode of the voltage regulator tube D3 is connected to the source electrode of the PMOS tube Q1, the positive electrode of the voltage regulator tube D3 is connected to the negative electrode of the LED, and the positive electrode of the LED is grounded through a resistor R11;
the positive pole of the LED is connected with the base electrodes of a triode Q6 and a triode Q7, the collector electrodes of the triode Q6 and the triode Q7 are grounded, the emitter electrode of the triode Q6 is connected with one end of an excitation coil L1 of a first relay through a resistor R13, the other end of the excitation coil L1 of the first relay is connected with the positive pole of a voltage regulator tube D4, the negative pole of the voltage regulator tube D4 is connected with the negative pole of the voltage regulator tube D3, the emitter electrode of the triode Q7 is connected with one end of an excitation coil L2 of a second relay through the resistor R12, and the other end of the excitation coil L2 of the second relay is connected with the positive pole of the voltage regulator tube D4; when the storage battery is reversely connected, the grounding end is changed into high level, at the moment, the anode of the storage battery, the resistor R11, the light emitting diode LED, the voltage regulator tube D3 and the cathode of the storage battery form a loop, and at the moment, the light emitting diode LED emits light for performing reverse connection alarm; on the other hand, the triode Q6 and the triode Q7 are switched on, the excitation coils of the first relay and the second relay are both electrified, the normally closed switch K1 of the first relay and the normally closed switch K2 of the second relay are switched off under the action of electromagnetic force, the voltage of the storage battery cannot be loaded to the secondary winding of the transformer T1, and the primary winding of the transformer T1 is also switched off from the mains supply connection, so that a good protection effect is achieved.
In this embodiment, the battery charging management circuit is a CN3763 chip and its peripheral circuit, and of course, other battery charging management circuits, such as a TP5400 chip and its peripheral circuit, may also be used, and the battery is an existing lithium battery.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. A low-voltage direct-current redundant power supply control system is characterized in that: the device comprises a transformer T1, a rectifying circuit Z1, a main power supply circuit, a storage battery BAT, a storage battery charging management circuit, a storage battery switching control circuit, a first relay, a second relay and a storage battery reverse connection detection control circuit;
the first relay and the second relay are normally closed relays;
the normally closed switch K1 of the first relay is arranged in an electrifying loop of a primary winding of the transformer T1, the normally closed switch K2 of the second relay is arranged between a secondary winding of the transformer T1 and the ground, and the storage battery reverse connection detection control circuit is used for detecting whether the storage battery is reversely connected and controlling the first relay and the second relay to be disconnected;
the positive output end of the secondary winding of the transformer T1 is connected with the input end of a rectifying circuit Z1, the output end of the rectifying circuit Z1 is connected with the input end of a main power supply circuit, and the output end of the main power supply circuit supplies power to a load;
the input end of the storage battery charging management circuit is connected with the output end of the rectifying circuit, and the charging output end of the storage battery charging management circuit is connected with the anode of the storage battery BAT;
the input end of the storage battery switching control circuit is connected to the anode of the storage battery BAT, the output end of the storage battery switching control circuit supplies power to the load, and the control input end of the storage battery switching control circuit is connected with the detection output end of the main power supply circuit.
2. The low-voltage direct-current redundant power supply control system according to claim 1, wherein: the main power supply circuit comprises an overvoltage detection circuit, a PMOS (P-channel metal oxide semiconductor) tube Q3 and a first MOS (metal oxide semiconductor) tube control circuit;
the drain electrode of PMOS pipe Q3 passes through electric capacity C5 ground connection, and PMOS pipe Q3 drain electrode is as main power supply circuit's output, and PMOS pipe Q3's source electrode is as main power supply circuit's input, and PMOS pipe Q3's grid is connected in first MOS pipe control circuit's control output, and first MOS pipe control circuit's detection output end is connected with battery switching control circuit's control input, overvoltage detection circuit's detection input end is connected in PMOS pipe Q3's source electrode, and overvoltage detection circuit's control output end is connected in first MOS pipe control circuit's control input end.
3. The low-voltage direct-current redundant power supply control system according to claim 2, wherein: the first MOS tube control circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a triode Q5, a triode Q4 and a capacitor C4;
one end of the resistor R9 is connected to the source of the PMOS transistor Q3, the other end of the resistor R9 is connected in parallel with the capacitor C4 through a resistor R10 and then grounded, a common connection point of the resistor R9 and the resistor R10 is connected to the base of the triode Q5 through a resistor R6, the emitter of the triode Q5 is grounded, the collector of the triode Q5 is connected in series with the source of the PMOS transistor Q3 through a resistor R7 and a resistor R8, the common connection point of the resistor R7 and the resistor R8 serves as a control output end of the first MOS transistor control circuit, the collector of the triode Q4 is connected to the common connection point of the resistor R9 and the resistor R10, the emitter of the triode Q4 is grounded, the base of the triode Q4 serves as a control input end of the first MOS transistor control circuit, and the common connection point of the resistor R9 and the resistor R10.
4. The low-voltage direct-current redundant power supply control system according to claim 2, wherein: the overvoltage detection circuit comprises a resistor R4, a resistor R5, a capacitor C3, a capacitor C6, a voltage regulator tube D1 and a voltage regulator tube D2;
one end of a resistor R4 is connected to the output end of the direct-current power supply, the other end of the resistor R4 is grounded through a resistor R5, a common connection point between a resistor R4 and the output end of the direct-current power supply is grounded through a capacitor C3, a common connection point between a resistor R4 and a resistor R5 is connected with the negative electrode of a voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is connected with the positive electrode of a voltage regulator tube D2, the negative electrode of the voltage regulator tube D2 serves as the control output end of the overvoltage detection circuit, and the positive electrode of the voltage regulator tube D1 is grounded through a capacitor.
5. The low-voltage direct-current redundant power supply control system according to claim 1, wherein: the storage battery switching control circuit comprises a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a PMOS (P-channel metal oxide semiconductor) transistor Q1 and a PMOS transistor Q2;
the source of the PMOS transistor Q1 is connected to the positive electrode of the battery BAT as the input terminal of the battery switching control circuit, the drain of the PMOS transistor Q1 is connected to the load as the output terminal of the battery switching control circuit, the source of the PMOS transistor Q1 is grounded through a capacitor C1, the source of the PMOS transistor Q1 is connected to the gate of the PMOS transistor Q1 through a resistor R1, the gate of the PMOS transistor Q1 is grounded through a capacitor C2, the gate of the PMOS transistor Q1 is connected to the emitter of the transistor Q2 through a resistor R2, the collector of the transistor Q2 is grounded, the base of the transistor Q2 is connected to one end of the resistor R3, and the other end of the resistor R3 is used as the control input terminal of the battery switching control circuit.
6. The low voltage dc redundant power supply control system of claim 4, wherein: the storage battery reverse connection detection control circuit comprises a resistor R11, a resistor R12, a resistor R13, a triode Q6, a triode Q7, a light emitting diode LED, a voltage regulator tube D3 and a voltage regulator tube D4;
the negative electrode of the voltage regulator tube D3 is connected to the source electrode of the PMOS tube Q1, the positive electrode of the voltage regulator tube D3 is connected to the negative electrode of the LED, and the positive electrode of the LED is grounded through a resistor R11;
the positive pole of the light emitting diode LED is connected with the base electrodes of a triode Q6 and a triode Q7, the collector electrodes of a triode Q6 and a triode Q7 are grounded, the emitter electrode of a triode Q6 is connected with one end of a magnet exciting coil L1 of a first relay through a resistor R13, the other end of the magnet exciting coil L1 of the first relay is connected with the positive pole of a voltage regulator tube D4, the negative pole of a voltage regulator tube D4 is connected with the negative pole of a voltage regulator tube D3, the emitter electrode of a triode Q7 is connected with one end of a magnet exciting coil L2 of a second relay through a resistor R12, and the other end of the magnet exciting coil L2 of the second relay is connected with the positive.
7. The battery-based redundant power supply system according to claim 1, wherein: the storage battery charging management circuit is a CN3763 chip and a peripheral circuit thereof.
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| CN202011634223.5A CN112952979A (en) | 2020-12-31 | 2020-12-31 | Low-voltage direct-current redundant power supply control system |
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| CN202011634223.5A CN112952979A (en) | 2020-12-31 | 2020-12-31 | Low-voltage direct-current redundant power supply control system |
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| CN114069825A (en) * | 2021-10-28 | 2022-02-18 | 国家电网有限公司 | Multi-output power direct current system |
| CN114069829A (en) * | 2021-11-22 | 2022-02-18 | 北京计算机技术及应用研究所 | Double-circuit redundant power supply auto-switch and recovery circuit |
| CN115372574A (en) * | 2022-08-17 | 2022-11-22 | 重庆亿森动力环境科技有限公司 | Water quality monitoring system based on Internet of things |
| CN117394507A (en) * | 2023-12-12 | 2024-01-12 | 广州伟仕达电子科技有限公司 | Intelligent charger for optimizing service life of battery and control circuit thereof |
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2020
- 2020-12-31 CN CN202011634223.5A patent/CN112952979A/en active Pending
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| CN113890172A (en) * | 2021-09-29 | 2022-01-04 | 国家电网有限公司 | UPS power supply system |
| CN113890172B (en) * | 2021-09-29 | 2024-01-12 | 国家电网有限公司 | UPS power supply system |
| CN114069825A (en) * | 2021-10-28 | 2022-02-18 | 国家电网有限公司 | Multi-output power direct current system |
| CN114069829A (en) * | 2021-11-22 | 2022-02-18 | 北京计算机技术及应用研究所 | Double-circuit redundant power supply auto-switch and recovery circuit |
| CN114069829B (en) * | 2021-11-22 | 2023-09-26 | 北京计算机技术及应用研究所 | Dual-path redundant power supply self-cutting and recovering circuit |
| CN115372574A (en) * | 2022-08-17 | 2022-11-22 | 重庆亿森动力环境科技有限公司 | Water quality monitoring system based on Internet of things |
| CN117394507A (en) * | 2023-12-12 | 2024-01-12 | 广州伟仕达电子科技有限公司 | Intelligent charger for optimizing service life of battery and control circuit thereof |
| CN117394507B (en) * | 2023-12-12 | 2024-02-20 | 广州伟仕达电子科技有限公司 | Intelligent charger for optimizing service life of battery and control circuit thereof |
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