CN104935042A - Detection and protection circuit used between uninterruptible power supply (UPS) and external accumulation battery - Google Patents
Detection and protection circuit used between uninterruptible power supply (UPS) and external accumulation battery Download PDFInfo
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- CN104935042A CN104935042A CN201510336987.9A CN201510336987A CN104935042A CN 104935042 A CN104935042 A CN 104935042A CN 201510336987 A CN201510336987 A CN 201510336987A CN 104935042 A CN104935042 A CN 104935042A
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Abstract
The invention discloses a detection and protection circuit used between an uninterruptible power supply (UPS) and an external accumulation battery. The circuit is simultaneously provided a circuit for detecting whether connection between the UPS and the external accumulation battery is normal, a circuit for controlling charging and discharging and a circuit for preventing inversed connection of the accumulation battery. The invention particularly relates to a detection and protection circuit used between the UPS and the external accumulation battery.
Description
Technical field
The present invention relates to protective circuit field between UPS and external storage battery, specifically a kind of for the detection between UPS and external storage battery and protective circuit.
Background technology
Along with the requirement of all kinds of power consumption equipment to the Performance And Reliability of power supply is more and more higher, UPS is widely used.UPS is when civil power input is normal, and civil power provides electric energy to power consumption equipment after UPS voltage stabilizing, simultaneously through overcharge circuit to charge in batteries; When civil power causes input abnormal because of maintenance, fault etc., UPS provides alternating current by after the DC inverter of storage battery to power consumption equipment.If when civil power is normal, UPS does not detect and is connected unexpected open circuit, short-circuit conditions with storage battery, and so when city's electrical anomaly, gently then UPS can not realize uninterrupted power supply, heavy then can to can not the equipment of interruptedly supplying power cause damage.This situation is even more important for the long-acting type UPS of external storage battery.
At present, detect between UPS and external storage battery and connect whether normal method mainly contains: current detecting mode and voltage detecting mode.For current detecting mode, when civil power is normal, to charge in batteries while UPS powers to power consumption equipment, when batteries to store energy is few, charging current is comparatively large, is generally several amperes; Along with the increase in charging interval, final floating current generally maintains a small value, only has tens milliamperes even several milliamperes; When UPS proceeds to storage battery power supply, electric current now can reach tens amperes even higher, and current detection range is wide, to the scope of circuit or transducer and required precision very high, difficulty is large, cost is high.For voltage detecting mode, because the charging port of UPS is directly connected with storage battery, the voltage of storage battery self or the voltage of UPS charging port during detection, cannot be distinguished.No matter whether some UPS start shooting, as long as civil power input is normal, namely charging port has charging voltage, as the MT series UPS of mountain spy.So just need ceaselessly to disconnect civil power input or charge closing circuit to detect battery tension, if patent publication No. is that CN103176100B " detects storage battery and whether connect normal method " by controlling charging panel in a kind of UPS, not to detect rapidly during charge in batteries battery tension judge whether to connect normal after, closed charging panel relay charging again, this detection mode is high to rate request, there is the risk of certain power failure.Or employing patent publication No. is the mode of CN102901903A and CN202815145U " UPS storage battery disconnection detection device ", if it is larger to detect electric current, then think there is no open circuit, when electric current is less, then interval disconnects UPS to the charging circuit of storage battery, detects voltage and judges whether storage battery normally connects.Although reduce current detecting requirement like this, need to detect voltage and current simultaneously, and also need when detecting voltage to disconnect charging circuit.No matter be when adopting current detecting mode or voltage detecting mode, all do not prevent the function causing UPS to damage during the reversal connection of storage battery accident, there is potential safety hazard.
summary of the inventionthe object of this invention is to provide a kind of for the detection between UPS and external storage battery and protective circuit, to connect whether normal detection method and protection Problems existing between prior art UPS and external storage battery to solve.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of for the detection between UPS and external storage battery and protective circuit, it is characterized in that: comprise single-chip microcomputer governor circuit, voltage sampling circuit, charge-discharge control circuit, storage battery reverse-connection preventing circuit, telecommunication circuit, wherein single-chip microcomputer governor circuit is connected with charge-discharge control circuit, realizes UPS and controls charge in batteries and battery discharging; Single-chip microcomputer governor circuit is connected with voltage sampling circuit, realizes judging state according to the detected value of voltage sampling circuit and controlling charge-discharge control circuit with this; Single-chip microcomputer governor circuit is connected with telecommunication circuit, completes and receives host computer order, sends status function; Described charge-discharge control circuit is connected with outside ups power, and is connected with storage battery reverse-connection preventing circuit, realizes storage battery and connects the charge and discharge control correctly; Storage battery reverse-connection preventing circuit is connected with outside storage battery, and is connected with charge-discharge control circuit, realizes preventing reverse connection of accumulator; Voltage sampling circuit is also connected with charge-discharge control circuit front end, storage battery reverse-connection preventing circuit front end respectively, completes the detection of UPS end and accumulator voltage.
Single-chip microcomputer governor circuit comprises the single-chip microcomputer D1 that model is STC12C2052AD, the VCC interface of single-chip microcomputer D1 connects voltage VCC, the VCC interface of single-chip microcomputer D1 is also by electric capacity C3 ground connection, the GND interfacing ground of single-chip microcomputer D1, the X1 of single-chip microcomputer D1, crystal oscillating circuit is connected with between X2 interface, described crystal oscillating circuit comprises crystal oscillator G1, crystal oscillator G1 one end is connected with electric capacity C4, the other end is connected with ground connection after electric capacity C5, the X1 of single-chip microcomputer D1 is also accessed at the two ends of crystal oscillator G1 respectively, X2 interface, the RST interface of single-chip microcomputer D1, EC1/T0/P3.4 interface is connected with watchdog circuit, described watchdog circuit comprises the watchdog chip D2 that model is MAX706CSA, the MR interface of watchdog chip D2 is by electric capacity C7 ground connection, the GND pin of watchdog chip D2, PFI pin ground connection altogether, the resistance R9 of WDO pin by connecting successively of watchdog chip D2, electric capacity C6 ground connection, and resistance R9, draw wire between electric capacity C6 and be connected to voltage VCC, the VCC pin of watchdog chip D2 is connected to resistance R9, between electric capacity C6, the RST pin of watchdog chip D2 is connected to the base stage of a triode V6 by resistance R11, the WDI pin of watchdog chip D2 passes through the EC1/T0/P3.4 interface of jumper wire device X1 and single-chip microcomputer D1, the collector electrode of described triode V6 is by resistance R8 ground connection, the RST interface of single-chip microcomputer D1 is connected to the collector electrode of triode V6, the emitter access voltage VCC of triode V6, and be connected with resistance R10 between the base stage of triode V6 and emitter.
Charge-discharge control circuit comprises triode V3, P channel power pipe V2, the base stage of triode V3 is connected to the P3.7/PCA0/PWM0 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by resistance R3, the emitter of triode V3 connects battery terminal negative, the collector electrode of triode V3 is connected with the grid of power tube V2 by resistance R2, the grid of power tube V2 is also connected to the anode of a voltage stabilizing didoe V1, the negative electrode of voltage stabilizing didoe V1 is connected with the source electrode of power tube V2, and voltage stabilizing didoe is parallel with resistance R1, the source electrode of power tube V2 is connected to outside ups power, the drain electrode of power tube V2 is connected to storage battery reverse-connection preventing circuit, described voltage sampling circuit comprises resistance R4-R7, wherein resistance R4 and resistance R5 series arm one in series, series arm one one end is connected with the source electrode of power tube V2, series arm one other end is connected with the emitter of triode V3, be connected with the P1.2/ADC2 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by wire between resistance R4 and R5, resistance R6 and resistance R7 series arm two in series, series arm two one end is connected with the drain electrode of power tube V2, series arm two other end is connected with the emitter of triode V3, be connected with the P1.3/ADC3 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by wire between resistance R6 and R7.
Storage battery reverse-connection preventing circuit comprises twin coil one group of normally opened contact magnetic latching relay K1, electrochemical capacitor C1 and C2, diode V4 and V5, the wherein actuation coil of electrochemical capacitor C1 and relay K 1 RC circuit one in series, the involution coils connected in series of electrochemical capacitor C2 and relay K 1 forms RC circuit two, in RC circuit one, electrochemical capacitor C1 end is connected with the negative electrode of a diode V4, in RC circuit two, electrochemical capacitor C2 end is connected with the negative electrode of a diode V5, in the anode of diode V4 and RC circuit two, involution coil-end is connected to outside battery positive voltage after connecing altogether, in the anode of diode V5 and RC circuit one, actuation coil end is connected to outside battery terminal negative after connecing altogether, and also connect battery terminal negative by wire between actuation coil and diode V5 anode, described relay K 1 one end is connected with the drain electrode of power tube V2 in charge-discharge control circuit, the other end of relay K 1 and the anode of diode V4, in RC circuit two, involution coil-end connects the outside battery positive voltage of rear connection altogether.
Telecommunication circuit comprises the serial ports transceiving chip D3 that model is MAX202CSE, the C1+ of serial ports transceiving chip D3, electric capacity C11 is connected with between C1-interface, the C2+ of serial ports transceiving chip D3, electric capacity C10 is connected with between C2-interface, the VCC of serial ports transceiving chip D3, electric capacity C8 is connected with between V+ interface, the GND of serial ports transceiving chip D3, electric capacity C9 is connected with between V-interface, the charge pump circuit of serial ports transceiving chip D3 is made up of electric capacity C8-C11, the VCC interface access+5V voltage of serial ports transceiving chip D3, the VCC interface of serial ports transceiving chip D3 is also by electric capacity C14 ground connection, the GND interface of serial ports transceiving chip D3, T2IN interface, R2IN interface is ground connection respectively, the R1IN interface of serial ports transceiving chip D3, R2IN interface, T1OUT interface is connected to a DB9 interface X4 respectively, the R1OUT interface of serial ports transceiving chip D3 is connected to the pin 2 of optocoupler N2 by resistance R16, the pin 1 of optocoupler N2 connects+5V voltage, the pin 3 of optocoupler N2 connects battery terminal negative, the pin 4 of optocoupler N2 meets power supply VCC by pull-up resistor R18, the pin 4 of optocoupler N2 is also connected with the RXD/P3.0 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit, the T1IN interface of serial ports transceiving chip D3 is connected with the pin 4 of an optocoupler N3, the pin 4 of optocoupler N3 also connects+5V voltage by pull-up resistor R19, pin 3 ground connection of optocoupler N3, the pin 1 of optocoupler N3 meets power supply VCC, the pin 2 of optocoupler N3 is connected with the TXD/P3.1 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by resistance R17.
The present invention provides between UPS with external storage battery whether be connected normal detection, charge and discharge control and storage battery reverse-connection preventing circuit simultaneously.This circuit is without the need to detection line electric current, and on-line checkingi UPS terminal voltage and accumulator voltage, can differentiate charging, electric discharge, storage battery low-voltage and malfunction, and can prevent reverse connection of accumulator, have volume little, and circuit is simple, the features such as applied range.
The present invention is that between UPS and outside storage battery, whether line normally provides a kind of state-detection and reverse connection prevention protection circuit, has the advantages such as detection and protective circuit is simple, volume is little, cost is low, applied range.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention.
Fig. 2 is single-chip microcomputer governor circuit figure of the present invention.
Fig. 3 is charge-discharge control circuit of the present invention and voltage sampling circuit figure.
Fig. 4 is storage battery reverse-connection preventing circuit figure of the present invention.
Fig. 5 is telecommunication circuit figure of the present invention.
Embodiment
As shown in Figure 1, a kind of for the detection between UPS and external storage battery and protective circuit, comprise single-chip microcomputer governor circuit, voltage sampling circuit, charge-discharge control circuit, storage battery reverse-connection preventing circuit, telecommunication circuit, wherein single-chip microcomputer governor circuit is connected with charge-discharge control circuit, realizes UPS and controls charge in batteries and battery discharging; Single-chip microcomputer governor circuit is connected with voltage sampling circuit, realizes judging state according to the detected value of voltage sampling circuit and controlling charge-discharge control circuit with this; Single-chip microcomputer governor circuit is connected with telecommunication circuit, completes and receives host computer order, sends status function; Described charge-discharge control circuit is connected with outside ups power, and is connected with storage battery reverse-connection preventing circuit, realizes storage battery and connects the charge and discharge control correctly; Storage battery reverse-connection preventing circuit is connected with outside storage battery, and is connected with charge-discharge control circuit, realizes preventing reverse connection of accumulator; Voltage sampling circuit is also connected with charge-discharge control circuit front end, storage battery reverse-connection preventing circuit front end respectively, completes the detection of UPS end and accumulator voltage.
Single-chip microcomputer governor circuit comprises the single-chip microcomputer D1 that model is STC12C2052AD, the VCC interface of single-chip microcomputer D1 connects voltage VCC, the VCC interface of single-chip microcomputer D1 is also by electric capacity C3 ground connection, the GND interfacing ground of single-chip microcomputer D1, the X1 of single-chip microcomputer D1, crystal oscillating circuit is connected with between X2 interface, described crystal oscillating circuit comprises crystal oscillator G1, crystal oscillator G1 one end is connected with electric capacity C4, the other end is connected with ground connection after electric capacity C5, the X1 of single-chip microcomputer D1 is also accessed at the two ends of crystal oscillator G1 respectively, X2 interface, the RST interface of single-chip microcomputer D1, EC1/T0/P3.4 interface is connected with watchdog circuit, described watchdog circuit comprises the watchdog chip D2 that model is MAX706CSA, the MR interface of watchdog chip D2 is by electric capacity C7 ground connection, the GND pin of watchdog chip D2, PFI pin ground connection altogether, the resistance R9 of WDO pin by connecting successively of watchdog chip D2, electric capacity C6 ground connection, and resistance R9, draw wire between electric capacity C6 and be connected to voltage VCC, the VCC pin of watchdog chip D2 is connected to resistance R9, between electric capacity C6, the RST pin of watchdog chip D2 is connected to the base stage of a triode V6 by resistance R11, the WDI pin of watchdog chip D2 passes through the EC1/T0/P3.4 interface of jumper wire device X1 and single-chip microcomputer D1, the collector electrode of described triode V6 is by resistance R8 ground connection, the RST interface of single-chip microcomputer D1 is connected to the collector electrode of triode V6, the emitter access voltage VCC of triode V6, and be connected with resistance R10 between the base stage of triode V6 and emitter.
Charge-discharge control circuit comprises triode V3, P channel power pipe V2, the base stage of triode V3 is connected to the P3.7/PCA0/PWM0 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by resistance R3, the emitter of triode V3 connects battery terminal negative, the collector electrode of triode V3 is connected with the grid of power tube V2 by resistance R2, the grid of power tube V2 is also connected to the anode of a voltage stabilizing didoe V1, the negative electrode of voltage stabilizing didoe V1 is connected with the source electrode of power tube V2, and voltage stabilizing didoe is parallel with resistance R1, the source electrode of power tube V2 is connected to outside ups power, the drain electrode of power tube V2 is connected to storage battery reverse-connection preventing circuit, described voltage sampling circuit comprises resistance R4-R7, wherein resistance R4 and resistance R5 series arm one in series, series arm one one end is connected with the source electrode of power tube V2, series arm one other end is connected with the emitter of triode V3, be connected with the P1.2/ADC2 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by wire between resistance R4 and R5, resistance R6 and resistance R7 series arm two in series, series arm two one end is connected with the drain electrode of power tube V2, series arm two other end is connected with the emitter of triode V3, be connected with the P1.3/ADC3 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by wire between resistance R6 and R7.
Storage battery reverse-connection preventing circuit comprises twin coil one group of normally opened contact magnetic latching relay K1, electrochemical capacitor C1 and C2, diode V4 and V5, the wherein actuation coil of electrochemical capacitor C1 and relay K 1 RC circuit one in series, the involution coils connected in series of electrochemical capacitor C2 and relay K 1 forms RC circuit two, in RC circuit one, electrochemical capacitor C1 end is connected with the negative electrode of a diode V4, in RC circuit two, electrochemical capacitor C2 end is connected with the negative electrode of a diode V5, in the anode of diode V4 and RC circuit two, involution coil-end is connected to outside battery positive voltage after connecing altogether, in the anode of diode V5 and RC circuit one, actuation coil end is connected to outside battery terminal negative after connecing altogether, and also connect battery terminal negative by wire between actuation coil and diode V5 anode, described relay K 1 one end is connected with the drain electrode of power tube V2 in charge-discharge control circuit, the other end of relay K 1 and the anode of diode V4, in RC circuit two, involution coil-end connects the outside battery positive voltage of rear connection altogether.
Telecommunication circuit comprises the serial ports transceiving chip D3 that model is MAX202CSE, the C1+ of serial ports transceiving chip D3, electric capacity C11 is connected with between C1-interface, the C2+ of serial ports transceiving chip D3, electric capacity C10 is connected with between C2-interface, the VCC of serial ports transceiving chip D3, electric capacity C8 is connected with between V+ interface, the GND of serial ports transceiving chip D3, electric capacity C9 is connected with between V-interface, the charge pump circuit of serial ports transceiving chip D3 is made up of electric capacity C8-C11, the VCC interface access+5V voltage of serial ports transceiving chip D3, the VCC interface of serial ports transceiving chip D3 is also by electric capacity C14 ground connection, the GND interface of serial ports transceiving chip D3, T2IN interface, R2IN interface is ground connection respectively, the R1IN interface of serial ports transceiving chip D3, R2IN interface, T1OUT interface is connected to a DB9 interface X4 respectively, the R1OUT interface of serial ports transceiving chip D3 is connected to the pin 2 of optocoupler N2 by resistance R16, the pin 1 of optocoupler N2 connects+5V voltage, the pin 3 of optocoupler N2 connects battery terminal negative, the pin 4 of optocoupler N2 meets power supply VCC by pull-up resistor R18, the pin 4 of optocoupler N2 is also connected with the RXD/P3.0 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit, the T1IN interface of serial ports transceiving chip D3 is connected with the pin 4 of an optocoupler N3, the pin 4 of optocoupler N3 also connects+5V voltage by pull-up resistor R19, pin 3 ground connection of optocoupler N3, the pin 1 of optocoupler N3 meets power supply VCC, the pin 2 of optocoupler N3 is connected with the TXD/P3.1 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by resistance R17.
The present invention includes single-chip microcomputer governor circuit, voltage sampling circuit, charge-discharge control circuit, storage battery reverse-connection preventing circuit, telecommunication circuit.Single-chip microcomputer governor circuit is connected with charge and discharge control circuit, realizes UPS and controls charge in batteries and battery discharging; Single-chip microcomputer governor circuit is connected with voltage sampling circuit, realizes judging state according to the magnitude of voltage of voltage sampling circuit and controlling charge-discharge control circuit with this; Single-chip microcomputer governor circuit is connected with telecommunication circuit, completes and receives host computer order, sends status function; Charge and discharge control circuit provides the interface be connected with UPS, and is connected with storage battery reverse-connection preventing circuit, completes storage battery and connects the charge and discharge control correctly; Storage battery reverse-connection preventing circuit provides the interface be connected with storage battery, and is connected with charge and discharge control circuit, and realization prevents reverse connection of accumulator and damages the defencive function of UPS; Voltage sampling circuit is connected with charge-discharge control circuit front end, storage battery reverse-connection preventing circuit front end, completes the sampling of UPS end and accumulator voltage.Described single-chip microcomputer governor circuit by single-chip microcomputer and with the use of crystal oscillator, resistance, electric capacity, PNP triode, jumper wire device, " house dog " chip composition (or single-chip microcomputer has inner house dog, outer watchdog chip also can not use), described voltage sampling circuit is made up of resistance, described charge-discharge control circuit by P channel power MOS FET and with the use of resistance, voltage stabilizing didoe, the drive circuit composition that triode is formed, described storage battery reverse-connection preventing circuit by magnetic latching relay and with the use of diode, the drive circuit composition that electric capacity is formed, described telecommunication circuit is by serial port chip, optocoupler, resistance, electric capacity forms.
Shown in Figure 2, single-chip microcomputer governor circuit of the present invention is made up of single-chip microcomputer D1, watchdog chip D2, crystal oscillator G1, electric capacity C3 ~ C7, resistance R8 ~ R11, PNP type triode V6, jumper wire device X1.Electric capacity C3 provides power filter for single-chip microcomputer D1; Crystal oscillator G1 and electric capacity C4, C5 form a clock oscillation circuit, for single-chip microcomputer D1 provides external timing signal; Watchdog chip D2, resistance R8 ~ R11, triode V6, electric capacity C6 ~ C7, jumper wire device X1 form watchdog circuit, when powering on for single-chip microcomputer provides a high level reset signal, and can produce reset signal when operation exception, improve the reliability of single-chip microcomputer; 11 pin of single-chip microcomputer are configured to recommend output by force, and for controlling charge-discharge control circuit, when detecting that UPS terminal voltage is greater than accumulator voltage, single-chip microcomputer 11 pin exports high level, allows UPS to charge in batteries; When discharge condition being detected, single-chip microcomputer 11 pin output low level, carrys out charge closing passage; 14,15 pin of single-chip microcomputer D1 are configured to out leak and export or input (high-impedance state) as AD, the magnitude of voltage of sampling UPS end and accumulator terminal; 2,3 pin of single-chip microcomputer D1 are connected with telecommunication circuit, are used for receiving the order of host computer and the state of transtation mission circuit.
Shown in Figure 3, voltage sampling circuit of the present invention is made up of resistance R4 ~ R7.Resistance R4, R5 form pressure sampling circuit, and the voltage held by UPS is divided to the magnitude of voltage being less than 5V and being applicable to single-chip microcomputer D1 sampling through R5, deliver to 14 pin of single-chip microcomputer; Resistance R6, R7 form pressure sampling circuit, the voltage of accumulator terminal are divided to the magnitude of voltage being less than 5V and being applicable to single-chip microcomputer D1 sampling by R7, deliver to 15 pin of single-chip microcomputer.Two-way sample circuit sample simultaneously UPS end and accumulator voltage, thus completion status judge.
Shown in Figure 3, charge and discharge control circuit of the present invention is made up of resistance R1 ~ R3, voltage stabilizing didoe V1, P channel power MOS FETV2, triode V3.Resistance R1, R2 and triode V3 form the drive circuit of V2, resistance R1, R2 the base stage of triode V3 be high level and saturation conduction time form bleeder circuit and be used for driving V2 conducting to complete the charging process of UPS to storage battery; When storage battery is discharged by the body diode of V2, single-chip microcomputer governor circuit 11 pin output low level makes triode V3 turn off charge closing passage; Voltage stabilizing didoe V1 is connected in parallel between the grid of V2 and source electrode, and the source gate voltage for the protection of V2 is unlikely to too high and punch through damage V2; Resistance R3 is the base stage current-limiting resistance of NPN type triode V3; P channel power MOS FETV2 is the core devices of charge-discharge control circuit, provides UPS to charge a battery passage, when V2 turns off, provide storage battery to the discharge channel of UPS by the inverse parallel body diode of V2 self when V2 conducting.
Shown in Figure 4, storage battery reverse-connection preventing circuit of the present invention is made up of twin coil one group of normally opened contact magnetic latching relay K1, electrochemical capacitor C1 ~ C2, diode V4 ~ V5.The coil resistance of the actuation coil of electrochemical capacitor C1 and magnetic latching relay K1 forms RC circuit, when accumulator polarity exact connect ion, provides drive pulse signal to the actuation coil of K1, and the normally opened contact of K1 is closed; The coil resistance of the involution coil of electrochemical capacitor C2 and magnetic latching relay K1 forms RC circuit, when the polarity of storage battery connects on the contrary, pulse drive signal is provided to the involution coil of K1, the normally opened contact involution of K1 is disconnected, now storage battery does not have place in circuit because relay K 1 contact disconnects, thus prevents reverse connection of accumulator from damaging UPS; Diode V4, V5 make two of magnetic latching relay groups of coils only have a group of access circuit, avoid two groups of coils to access simultaneously and cause abnormal operation and abnormal wear, and can prevent electrochemical capacitor from damaging because of accumulator polarity reversal connection.
Shown in Figure 5, telecommunication circuit of the present invention is made up of electric capacity C8 ~ C11 and C14, serial ports transceiving chip D3, DB9 interface X2, optocoupler N2 and N3, resistance R16 ~ R19.Electric capacity C8 ~ C11 forms the charge pump circuit of serial ports transceiving chip D3, and optocoupler N2 and N3 realizes the serial ports isolation of host computer serial ports and single-chip microcomputer D1, coordinates serial ports transceiving chip D3 to complete the transmitting-receiving of level conversion and serial data.
The workflow of circuit: single-chip microcomputer governor circuit by telecommunication circuit and the order of host computer communications reception, send state.Single-chip microcomputer governor circuit constantly detects the voltage sample value of UPS end and accumulator terminal, and when storage battery does not access, voltage sampling circuit can't detect accumulator voltage and is judged as malfunction; When storage battery is accessed by storage battery reverse-connection preventing circuit, if polarity is correct, the magnetic latching relay closing of contact, now voltage sampling circuit can detect that battery tension is not less than setting threshold, then judge that storage battery normally connects; If polarity is contrary, the involution of magnetic latching relay contact disconnects, and now voltage sampling circuit can't detect battery tension, is judged as malfunction; If when storage battery does not access, when generation storage battery reverse-connection preventing circuit is supplied to the interface short circuit of storage battery access, voltage sampling circuit can't detect magnitude of voltage, is judged as malfunction.When storage battery normally connects, suppose that the input of UPS civil power is normal, then voltage sampling circuit can sample UPS charging port and accumulator voltage value, now single-chip microcomputer governor circuit exports high level control V3 conducting thus controls charge-discharge circuit V2 conducting to charge in batteries, because the conduction voltage drop of V2 exists, the voltage that UPS is held is higher than accumulator voltage, and therefore single-chip microcomputer governor circuit judges charged state by the size of two sampled values.When the input of UPS civil power needs to proceed to storage battery power supply extremely, the charging port of UPS does not have voltage, owing to judging that storage battery normally connects, now storage battery drops into electric discharge immediately by the antiparallel body diode of the V2 of charge-discharge control circuit, because there is conduction voltage drop equally in body diode, voltage sampling circuit can sample battery terminal voltage and be greater than UPS terminal voltage, is judged as battery discharging state and is controlled to turn off V3 by single-chip microcomputer governor circuit; When detect storage battery be in discharge condition and magnitude of voltage reach setting low voltage threshold time, judge battery discharging low-voltage state.
Claims (5)
1. one kind for the detection between UPS and external storage battery and protective circuit, it is characterized in that: comprise single-chip microcomputer governor circuit, voltage sampling circuit, charge-discharge control circuit, storage battery reverse-connection preventing circuit, telecommunication circuit, wherein single-chip microcomputer governor circuit is connected with charge-discharge control circuit, realizes UPS and controls charge in batteries and battery discharging; Single-chip microcomputer governor circuit is connected with voltage sampling circuit, realizes judging state according to the detected value of voltage sampling circuit and controlling charge-discharge control circuit with this; Single-chip microcomputer governor circuit is connected with telecommunication circuit, completes and receives host computer order, sends status function; Described charge-discharge control circuit is connected with outside ups power, and is connected with storage battery reverse-connection preventing circuit, realizes storage battery and connects the charge and discharge control correctly; Storage battery reverse-connection preventing circuit is connected with outside storage battery, and is connected with charge-discharge control circuit, realizes preventing reverse connection of accumulator; Voltage sampling circuit is also connected with charge-discharge control circuit front end, storage battery reverse-connection preventing circuit front end respectively, completes the detection of UPS end and accumulator voltage.
2. according to claim 1 a kind of for the detection between UPS and external storage battery and protective circuit, it is characterized in that: described single-chip microcomputer governor circuit comprises the single-chip microcomputer D1 that model is STC12C2052AD, the VCC interface of single-chip microcomputer D1 connects voltage VCC, the VCC interface of single-chip microcomputer D1 is also by electric capacity C3 ground connection, the GND interfacing ground of single-chip microcomputer D1, the X1 of single-chip microcomputer D1, crystal oscillating circuit is connected with between X2 interface, described crystal oscillating circuit comprises crystal oscillator G1, crystal oscillator G1 one end is connected with electric capacity C4, the other end is connected with ground connection after electric capacity C5, the X1 of single-chip microcomputer D1 is also accessed at the two ends of crystal oscillator G1 respectively, X2 interface, the RST interface of single-chip microcomputer D1, EC1/T0/P3.4 interface is connected with watchdog circuit, described watchdog circuit comprises the watchdog chip D2 that model is MAX706CSA, the MR interface of watchdog chip D2 is by electric capacity C7 ground connection, the GND pin of watchdog chip D2, PFI pin ground connection altogether, the resistance R9 of WDO pin by connecting successively of watchdog chip D2, electric capacity C6 ground connection, and resistance R9, draw wire between electric capacity C6 and be connected to voltage VCC, the VCC pin of watchdog chip D2 is connected to resistance R9, between electric capacity C6, the RST pin of watchdog chip D2 is connected to the base stage of a triode V6 by resistance R11, the WDI pin of watchdog chip D2 passes through the EC1/T0/P3.4 interface of jumper wire device X1 and single-chip microcomputer D1, the collector electrode of described triode V6 is by resistance R8 ground connection, the RST interface of single-chip microcomputer D1 is connected to the collector electrode of triode V6, the emitter access voltage VCC of triode V6, and be connected with resistance R10 between the base stage of triode V6 and emitter.
3. according to claim 1 a kind of for the detection between UPS and external storage battery and protective circuit, it is characterized in that: described charge-discharge control circuit comprises triode V3, P channel power pipe V2, the base stage of triode V3 is connected to the P3.7/PCA0/PWM0 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by resistance R3, the emitter of triode V3 connects battery terminal negative, the collector electrode of triode V3 is connected with the grid of power tube V2 by resistance R2, the grid of power tube V2 is also connected to the anode of a voltage stabilizing didoe V1, the negative electrode of voltage stabilizing didoe V1 is connected with the source electrode of power tube V2, and voltage stabilizing didoe is parallel with resistance R1, the source electrode of power tube V2 is connected to outside ups power, the drain electrode of power tube V2 is connected to storage battery reverse-connection preventing circuit, described voltage sampling circuit comprises resistance R4-R7, wherein resistance R4 and resistance R5 series arm one in series, series arm one one end is connected with the source electrode of power tube V2, series arm one other end is connected with the emitter of triode V3, be connected with the P1.2/ADC2 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by wire between resistance R4 and R5, resistance R6 and resistance R7 series arm two in series, series arm two one end is connected with the drain electrode of power tube V2, series arm two other end is connected with the emitter of triode V3, be connected with the P1.3/ADC3 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by wire between resistance R6 and R7.
4. according to claim 1 a kind of for the detection between UPS and external storage battery and protective circuit, it is characterized in that: described storage battery reverse-connection preventing circuit comprises twin coil one group of normally opened contact magnetic latching relay K1, electrochemical capacitor C1 and C2, diode V4 and V5, the wherein actuation coil of electrochemical capacitor C1 and relay K 1 RC circuit one in series, the involution coils connected in series of electrochemical capacitor C2 and relay K 1 forms RC circuit two, in RC circuit one, electrochemical capacitor C1 end is connected with the negative electrode of a diode V4, in RC circuit two, electrochemical capacitor C2 end is connected with the negative electrode of a diode V5, in the anode of diode V4 and RC circuit two, involution coil-end is connected to outside battery positive voltage after connecing altogether, in the anode of diode V5 and RC circuit one, actuation coil end is connected to outside battery terminal negative after connecing altogether, and also connect battery terminal negative by wire between actuation coil and diode V5 anode, described relay K 1 one end is connected with the drain electrode of power tube V2 in charge-discharge control circuit, the other end of relay K 1 and the anode of diode V4, in RC circuit two, involution coil-end connects the outside battery positive voltage of rear connection altogether.
5. according to claim 1 a kind of for the detection between UPS and external storage battery and protective circuit, it is characterized in that: described telecommunication circuit comprises the serial ports transceiving chip D3 that model is MAX202CSE, the C1+ of serial ports transceiving chip D3, electric capacity C11 is connected with between C1-interface, the C2+ of serial ports transceiving chip D3, electric capacity C10 is connected with between C2-interface, the VCC of serial ports transceiving chip D3, electric capacity C8 is connected with between V+ interface, the GND of serial ports transceiving chip D3, electric capacity C9 is connected with between V-interface, the charge pump circuit of serial ports transceiving chip D3 is made up of electric capacity C8-C11, the VCC interface access+5V voltage of serial ports transceiving chip D3, the VCC interface of serial ports transceiving chip D3 is also by electric capacity C14 ground connection, the GND interface of serial ports transceiving chip D3, T2IN interface, R2IN interface is ground connection respectively, the R1IN interface of serial ports transceiving chip D3, R2IN interface, T1OUT interface is connected to a DB9 interface X4 respectively, the R1OUT interface of serial ports transceiving chip D3 is connected to the pin 2 of optocoupler N2 by resistance R16, the pin 1 of optocoupler N2 connects+5V voltage, the pin 3 of optocoupler N2 connects battery terminal negative, the pin 4 of optocoupler N2 meets power supply VCC by pull-up resistor R18, the pin 4 of optocoupler N2 is also connected with the RXD/P3.0 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit, the T1IN interface of serial ports transceiving chip D3 is connected with the pin 4 of an optocoupler N3, the pin 4 of optocoupler N3 also connects+5V voltage by pull-up resistor R19, pin 3 ground connection of optocoupler N3, the pin 1 of optocoupler N3 meets power supply VCC, the pin 2 of optocoupler N3 is connected with the TXD/P3.1 interface of single-chip microcomputer D1 in single-chip microcomputer governor circuit by resistance R17.
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| CN105676054A (en) * | 2016-03-17 | 2016-06-15 | 杭州普安科技有限公司 | Cable reversal connection and short-circuit detection circuit |
| CN108802622A (en) * | 2018-05-24 | 2018-11-13 | 武汉工程大学 | A kind of accumulator monitoring activation apparatus and system |
| CN108832686A (en) * | 2018-06-28 | 2018-11-16 | 苏州格远电气有限公司 | Charge circuit and charge circuit detection method |
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| CN114640163A (en) * | 2022-05-18 | 2022-06-17 | 广东高斯宝电气技术有限公司 | Interface circuit for parallel operation of direct-current power supply and battery |
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