CN203398833U - Battery charging/discharging circuit of uninterruptible power supply - Google Patents
Battery charging/discharging circuit of uninterruptible power supply Download PDFInfo
- Publication number
- CN203398833U CN203398833U CN201320458758.0U CN201320458758U CN203398833U CN 203398833 U CN203398833 U CN 203398833U CN 201320458758 U CN201320458758 U CN 201320458758U CN 203398833 U CN203398833 U CN 203398833U
- Authority
- CN
- China
- Prior art keywords
- power supply
- battery
- charging
- chip microcomputer
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
Provided is a battery charging/discharging circuit of an uninterruptible power supply. The battery charging/discharging circuit comprises a charger, a discharge diode and a charging/discharging control circuit. The charging/discharging control circuit comprises a single-chip microcomputer, a charging relay and a charging MOS transistor. A nickel-metal hydride battery is charged by the charger via a normally-open contact of the charging relay. The charger is connected with an input terminal of a DC booster of the uninterruptible power supply via a normally-closed contact of the charging relay, with a control signal input terminal being connected with an output port of the single-chip microcomputer. The charging MOS transistor controls a control coil of the charging relay, with a grid electrode thereof being connected with the output port of the single-chip microcomputer. The output voltage of the nickel-metal hydride battery is divided via a first resistor and a second resistor, and then is connected with a voltage sampling port of the single-chip microcomputer. A third resistor is serially connected between a negative electrode of the nickel-metal hydride battery and an output terminal of the charger. The output signal is connected with a current sampling port of the single-chip microcomputer. An inverter is powered by the nickel-metal hydride battery via the discharge diode. By means of the battery charging/discharging circuit of the utility model, the charging frequency is greatly reduced, thereby prolonging the service lifetime of the nickel-metal hydride battery and decreasing the operation and maintenance cost of the uninterruptible power supply.
Description
Technical field
The utility model relates to a kind of battery charger that prevents that uninterrupted power supply interior nickel hydrogen battery from frequently discharging and recharging, and belongs to power technique fields.
Background technology
Because lead-acid battery and lithium battery can not be at heavy-current discharges under cryogenic conditions, the uninterrupted power supply therefore working in low temperature environment generally need be selected Ni-MH battery.The charging modes of Ni-MH battery is different from lead-acid battery and lithium battery, and floating charge, can only adopt constant current charge mode for a long time.The constant current charger of existing uninterrupted power supply will quit work after battery is full of to electricity, but for realizing online zero handoff functionality of uninterrupted power supply, Ni-MH battery keeps Hot Spare state always, that is to say that Ni-MH battery is full of after electricity always in low discharging current state, cause the charge cycle of Ni-MH battery to shorten, the charging frequency increases, and greatly reduces the useful life of Ni-MH battery, has improved the operation and maintenance cost of uninterrupted power supply.
Utility model content
The purpose of this utility model is the drawback for prior art, and a kind of battery charging and discharging circuit of uninterrupted power supply is provided, and to extend the useful life of Ni-MH battery, reduces the operation and maintenance cost of uninterrupted power supply.
Problem described in the utility model realizes with following technical proposals:
A kind of battery charging and discharging circuit of uninterrupted power supply, formation comprises charger, discharge diode and charge-discharge control circuit, described charge-discharge control circuit comprises single-chip microcomputer, charge relay, charging metal-oxide-semiconductor and three resistance, described charger is through the normally opened contact of charge relay to Ni-MH battery charging and connect the DC boosting input of uninterrupted power supply through the normally-closed contact of charge relay, and its control signal input connects the output port of single-chip microcomputer; Described charging metal-oxide-semiconductor is controlled charge relay control coil, and its grid connects the output port of single-chip microcomputer; The output voltage of Ni-MH battery connects the voltage sample port of single-chip microcomputer after the first resistance and the second electric resistance partial pressure, and the 3rd resistance is serially connected between nickel-hydrogen battery negative pole and charger output ground, and its output signal connects the current sample port of single-chip microcomputer through amplifier; Ni-MH battery is the DC voltage booster circuit power supply to uninterrupted power supply through discharge diode.
The battery charging and discharging circuit of above-mentioned uninterrupted power supply, in formation, also comprise electric discharge relay, electric discharge metal-oxide-semiconductor and D.C. contactor, the normally opened contact of described electric discharge relay is connected to Ni-MH battery two ends after being connected in series with the control coil of D.C. contactor, the control coil of described electric discharge metal-oxide-semiconductor controlled discharge relay, its grid connects the output port of single-chip microcomputer; The normally opened contact of described D.C. contactor is attempted by discharge diode.
The battery charging and discharging circuit of above-mentioned uninterrupted power supply, described charger comprises rectifier bridge, switching tube, transformer, rectifier diode and PWM isolated drive circuit, after being connected in series, the primary coil of described switching tube and transformer connects the direct voltage of rectifier bridge output, the input of described PWM isolated drive circuit connects the output port of single-chip microcomputer, the grid of its output termination switching tube; Secondary coil one termination charger output Di， one end of described transformer connects the common of charge relay through rectifier diode.
The battery charging and discharging circuit of above-mentioned uninterrupted power supply, described charge-discharge control circuit is powered by DC/DC accessory power supply, the direct-flow input end of the input termination uninterrupted power supply of described accessory power supply.
The battery charging and discharging circuit of above-mentioned uninterrupted power supply, on the control coil of described charge relay and electric discharge relay all and be connected to fly-wheel diode.
The battery charging and discharging circuit of above-mentioned uninterrupted power supply is serially connected with fuse in the discharge loop of Ni-MH battery.
Charge-discharge control circuit of the present utility model can carry out Real-Time Monitoring to the voltage of Ni-MH battery, after battery has charged, charger output is switched to the DC boosting input of uninterrupted power supply, by charger, provides Hot Spare required energy consumption for uninterrupted power supply; When Ni-MH battery causes cell voltage to reduce because of self discharge, capacity reduces thereupon, Single Chip Microcomputer (SCM) program is according to the sampled voltage of Ni-MH battery, calculate battery capacity, when Ni-MH battery capacity drop to rated value 80% time, charge-discharge control circuit switches to Ni-MH battery by charger output again, starts to charge to Ni-MH battery.Because Ni-MH battery need not provide Hot Spare energy after being full of electricity, greatly reduce the velocity of discharge of battery, reduce the charging frequency, thereby extended the useful life of Ni-MH battery, reduced the operation and maintenance cost of uninterrupted power supply.In addition, the utility model also has that circuit structure is simple, with low cost, high reliability.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is electrical schematic diagram of the present utility model.
In figure, each list of reference numerals is: B, Ni-MH battery; U1, single-chip microcomputer; U2, PWM isolation drive; ZQ, rectifier bridge; DC/DC, accessory power supply; T, transformer; NB, uninterrupted power supply DC boosting; K1, electric discharge relay; K2, charge relay; K3, D.C. contactor; D1, the first fly-wheel diode; D2, the second fly-wheel diode; D3, discharge diode; D4, rectifier diode; T1, electric discharge metal-oxide-semiconductor; T2, charging metal-oxide-semiconductor; T3, switching tube; R1～R3, the first resistance～three resistance; FU, fuse.
Embodiment
Referring to Fig. 1, the utility model is comprised of charger, discharge diode, accessory power supply and charge-discharge control circuit.Wherein charger is comprised of PWM isolation drive U2, rectifier bridge ZQ, transformer T, rectifier diode D4 and switch transistor T 3; Charge-discharge control circuit is comprised of single-chip microcomputer U1, electric discharge relay K 1, charge relay K2, D.C. contactor K3, the first sustained diode 1, the second sustained diode 2, discharge diode D3, electric discharge metal-oxide-semiconductor T1, charging metal-oxide-semiconductor T2, the first resistance R 1～three resistance R 3 and fuse FU, and accessory power supply is charge-discharge control circuit power supply.
The operation principle of this circuit is as follows:
The terminal voltage of the bleeder circuit monitoring Ni-MH battery B that single-chip microcomputer U1 consists of the first resistance R 1 and the second resistance R 2, judge whether Ni-MH battery B needs charging, by the 3rd resistance R 3, monitor the charging current of Ni-MH battery B, and control the output current of constant current charger.When Ni-MH battery B is monitored to while being full of electricity, the P1.3 port of single-chip microcomputer U1 provides low level signal, and this signal is delivered to the grid of electric discharge metal-oxide-semiconductor T1, electric discharge metal-oxide-semiconductor T1 cut-off, the relay K 1 that makes to discharge disconnects, and after electric discharge relay K 1 disconnects, D.C. contactor K3 disconnects, meanwhile, the low level signal that the P1.4 port of single-chip microcomputer U1 also provides, this signal is delivered to the grid of charging metal-oxide-semiconductor T2, charging metal-oxide-semiconductor T2 cut-off, the normally opened contact of charge relay K2 disconnects, normally-closed contact is closed, make the output of charger be connected to the input of the DC boosting NB of uninterrupted power supply, simultaneously, control program by the output voltage stabilization of charger on maximum charging voltage, the terminal voltage of charger output voltage >=Ni-MH battery B now, it is cathode voltage >=its anode voltage of discharge diode D3, Ni-MH battery B can outwards not discharge, battery can not be recharged yet.Now, direct current input Hot Spare power demand is provided by charger completely.
When the interchange input of uninterrupted power supply occurs when abnormal, charger output voltage V+reduce rapidly, when conduction voltage drop+charger output voltage V+time of terminal voltage >=discharge diode D3 of Ni-MH battery B, the input of uninterrupted power supply DC boosting NB is powered by discharge diode D3 by Ni-MH battery B, realizes uninterrupted power supply zero handoff functionality.Meanwhile, the P1.3 port of single-chip microcomputer U1 provides high level signal, this signal is delivered to the grid of electric discharge metal-oxide-semiconductor T1, electric discharge metal-oxide-semiconductor T1 conducting, and then 1 adhesive of guiding discharge relay K, after 1 adhesive of electric discharge relay K, D.C. contactor K3 adhesive, discharge diode D3, by D.C. contactor K3 short circuit, guarantees that discharge diode D3 does not work long hours, and has reduced the loss of energy.In whole process, Vin+ can be lower than battery undervoltage voltage, and accessory power supply working stability is normal.
When the voltage of Ni-MH battery B is detected when too low, uninterrupted power supply DC boosting NB under-voltage protection, no longer consuming cells electric weight.When interchange input recovers normal, single-chip microcomputer U1 is adjusted into high level by the output signal of its P1.4 port, and this level is delivered to charging metal-oxide-semiconductor T2 grid, charging metal-oxide-semiconductor T2 conducting, charge relay K2 adhesive, makes V+ be connected to the positive pole of Ni-MH battery B, starts to charge to Ni-MH battery B.Now the P1.3 port of single-chip microcomputer U1 is low level, and D.C. contactor K3 disconnects, and when charger charges for battery, by diode D3, provides Hot Spare DC power supply for uninterrupted power supply DC boosting NB.
The effect of fuse FU in circuit is protection Ni-MH battery B and DC circuit; Acting as of the first sustained diode 1 and the second sustained diode 2 slows down surge voltage disturbance.
Claims (6)
1. the battery charging and discharging circuit of a uninterrupted power supply, it is characterized in that, described circuit comprises charger, discharge diode (D3) and charge-discharge control circuit, described charge-discharge control circuit comprises single-chip microcomputer (U1), charge relay (K2) and charging metal-oxide-semiconductor (T2), described charger through the normally opened contact of charge relay (K2) to Ni-MH battery (B) charging and connect the input of uninterrupted power supply DC boosting (NB) through the normally-closed contact of charge relay (K2); Described charging metal-oxide-semiconductor (T2) is controlled charge relay (K2) control coil, and its grid connects the output port of single-chip microcomputer (U1); The output voltage of Ni-MH battery (B) connects the voltage sample port of single-chip microcomputer (U1) after the first resistance (R1) and the second resistance (R2) dividing potential drop, the 3rd resistance (R3) is serially connected between Ni-MH battery (B) negative pole and charger output ground, and its output signal connects the current sample port of single-chip microcomputer (U1); Ni-MH battery (B) is given DC boosting (NB) power supply of uninterrupted power supply through discharge diode (D3).
2. the battery charging and discharging circuit of a kind of uninterrupted power supply according to claim 1, it is characterized in that, in formation, also comprise electric discharge relay (K1), electric discharge metal-oxide-semiconductor (T1) and D.C. contactor (K3), the normally opened contact of described electric discharge relay (K1) is connected to Ni-MH battery (B) two ends after being connected in series with the control coil of D.C. contactor (K3), the control coil of described electric discharge metal-oxide-semiconductor (T1) controlled discharge relay (K1), its grid connects the output port of single-chip microcomputer (U1); The normally opened contact of described D.C. contactor (K3) is attempted by discharge diode (D3).
3. the battery charging and discharging circuit of a kind of uninterrupted power supply according to claim 1 and 2, it is characterized in that, described charger comprises rectifier bridge (ZQ), switching tube (T3), transformer (T), rectifier diode (D4) and PWM isolated drive circuit (U2), after being connected in series, the primary coil of described switching tube (T3) and transformer (T) connects the direct voltage of rectifier bridge (ZQ) output, the input of described PWM isolated drive circuit (U2) connects the output port of single-chip microcomputer (U1), the grid of its output termination switching tube (T3); Secondary coil one termination charger output Di， one end of described transformer (T) connects the common of charge relay (K2) through rectifier diode (D4).
4. the battery charging and discharging circuit of a kind of uninterrupted power supply according to claim 3, is characterized in that, described charge-discharge control circuit is powered by DC/DC accessory power supply, the input of the input termination uninterrupted power supply DC boosting (NB) of described accessory power supply.
5. the battery charging and discharging circuit of a kind of uninterrupted power supply according to claim 4, is characterized in that, on the control coil of described charge relay (K2) and electric discharge relay (K1) all and be connected to fly-wheel diode.
6. the battery charging and discharging circuit of a kind of uninterrupted power supply according to claim 5, is characterized in that, is serially connected with fuse (FU) in the discharge loop of Ni-MH battery (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320458758.0U CN203398833U (en) | 2013-07-30 | 2013-07-30 | Battery charging/discharging circuit of uninterruptible power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320458758.0U CN203398833U (en) | 2013-07-30 | 2013-07-30 | Battery charging/discharging circuit of uninterruptible power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203398833U true CN203398833U (en) | 2014-01-15 |
Family
ID=49910331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320458758.0U Expired - Lifetime CN203398833U (en) | 2013-07-30 | 2013-07-30 | Battery charging/discharging circuit of uninterruptible power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203398833U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022554A (en) * | 2014-06-23 | 2014-09-03 | 苏州塔可盛电子科技有限公司 | Battery charging and discharging circuit based on AT89C2051 single chip microcomputer and UC3842 chip |
| CN112201865A (en) * | 2020-09-28 | 2021-01-08 | 山东精工电源科技有限公司 | Automatic intelligent lithium battery capable of arbitrarily controlling charging and discharging time and displaying fault reason based on PLC |
-
2013
- 2013-07-30 CN CN201320458758.0U patent/CN203398833U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022554A (en) * | 2014-06-23 | 2014-09-03 | 苏州塔可盛电子科技有限公司 | Battery charging and discharging circuit based on AT89C2051 single chip microcomputer and UC3842 chip |
| CN112201865A (en) * | 2020-09-28 | 2021-01-08 | 山东精工电源科技有限公司 | Automatic intelligent lithium battery capable of arbitrarily controlling charging and discharging time and displaying fault reason based on PLC |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102664454B (en) | Non-floating charging type substation direct current power supply system based on iron lithium battery | |
| CN102290856B (en) | Double-power device and power supplying method thereof | |
| CN106787045B (en) | Direct current power supply system and control method thereof | |
| WO2017212815A1 (en) | Trickle charging power supply system | |
| CN102842945A (en) | Intelligent charger for storage battery | |
| CN209056972U (en) | Nickel-metal hydride battery UPS control system | |
| CN103368235B (en) | Nickel-metal hydride battery charge-discharge circuit in uninterruptible power supply | |
| CN104882936B (en) | Communication energy storage power supply system | |
| CN202455097U (en) | Battery management system of energy storage station | |
| CN111092471B (en) | Using method of overcharge and overdischarge protection circuit for energy storage battery pack | |
| CN203398833U (en) | Battery charging/discharging circuit of uninterruptible power supply | |
| CN202678988U (en) | Intelligent power supply control system | |
| CN203690903U (en) | Battery under-voltage protection circuit | |
| CN111181224A (en) | Charging system for multi-section series battery pack and charging method thereof | |
| CN202550664U (en) | Direct current power supply system of non-floating charge type transformer substation based on lithium iron battery | |
| CN203289174U (en) | Full-automatic large-power LED lamp power supply circuit | |
| CN202084913U (en) | Automatic switching device for overdischarging of battery in direct current power supply system | |
| CN104917253A (en) | Charge-discharge control circuit of BMS | |
| CN104124723A (en) | Circuit for preventing cell from overcharging/overdischarging | |
| CN103312025A (en) | Intelligent power supply control system | |
| CN102545274B (en) | Lead-acid battery charger and charging method thereof | |
| CN101794985A (en) | High-voltage direct-current (HVDC) system battery charging protecting circuit structure | |
| CN105743188A (en) | Plumbic acid battery pack protection system | |
| CN211061602U (en) | Weak current over-current detection circuit of battery management system | |
| CN214707295U (en) | Intelligent power storage device and electronic toll collection equipment without stopping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151104 Address after: 050035 No. 56, 3 Kunlun street, Shijiazhuang Development Zone, Hebei, China Patentee after: Shijiazhuang Guoyao Eletronic Co.,Ltd. Address before: 050035 No. 56, 3 Kunlun street, Shijiazhuang Development Zone, Hebei, China Patentee before: Shijiazhuang Guoyao Eletronic Co.,Ltd. Patentee before: Shenzhen Guoyao Electronic Technology Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |