CN200944535Y - Nickel-hydrogen battery charging circuit - Google Patents
Nickel-hydrogen battery charging circuit Download PDFInfo
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- CN200944535Y CN200944535Y CNU200620063855XU CN200620063855U CN200944535Y CN 200944535 Y CN200944535 Y CN 200944535Y CN U200620063855X U CNU200620063855X U CN U200620063855XU CN 200620063855 U CN200620063855 U CN 200620063855U CN 200944535 Y CN200944535 Y CN 200944535Y
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Abstract
A nickel-hydrogen battery charging circuit \ comprises at least one group of nickel hydrogen battery and at least one group of battery group charging managing board, wherein, the battery group charging managing board comprises a port (B+ and B-) connected with a battery and a port (P+ and P-) connected with an adaptor. The port (B+ and B-) is connected with a micro-processor MCU control and managing circuit, a battery voltage inspection circuit and a power source voltage inspection circuit. The port (P+ and P-) is connected with a charging DC-DC main loop. The charging DC-DC main loop is connected with the micro-processor MCU control and managing circuit. The utility model provides the nickel hydrogen battery group charging circuit of low cost, simple circuit, low electricity consumption, reliability, high using efficiency of battery and long life-span.
Description
Technical field
The utility model relates to a kind of battery charger, is meant a kind of Ni-MH battery group charging circuit especially.
Background technology
At present many portable PDVD producer is chosen as the supporting Ni-MH battery with advantages such as cost are low, capacity is big, the life-span is long of its portable PDVD in order to reduce cost.Along with the price of portable PDVD declines to a great extent, cause the cost requirement of battery that portable PDVD is used and charging circuit lower, but, the charging detected parameters of Ni-MH battery is more, the management more complicated, as, the Chinese utility model patent specification of the CN2662518Y that on December 8th, 2004 was announced discloses a kind of " Ni-MH battery quick charger ".During concrete the application, the performance of portable PDVD performance can not be influenced, the service efficiency and the life-span of battery can not be influenced especially in order to reduce this.But there is following problem mostly in the effective scheme that does not influence portable PDVD performance performance at present in order to reduce cost:
If 1 requires to have while filling to put (adapter need be powered to electrical appliance) when charging the battery, must there be the Schottky diode of other MOSFET or big electric current just can finish.
2, most variations charging and discharge control MOSFET adopt the MOSFET pipe of P-CHANNEL raceway groove, because the problem of production technology, the cost of this MOSFET pipe is than higher.
3, discharge and recharge at same end if desired, the cost of increase is higher, and the quiescent current of whole plate is also bigger.
The utility model content
The problem that the utility model need solve be at above-mentioned prior art present situation provide that a kind of cost is low, power consumptive province, reliable, battery service efficiency height, long Ni-MH battery group charging circuit of life-span.
Designed a kind of Ni-MH battery group charging circuit according to the above-mentioned problem that needs to solve, comprise at least one group Ni-MH battery and batteries charging management board, described batteries charging management board comprises the port (B+ that connects with battery, B-), the port (P+ that connects with adapter, P-), with port (B+, B-) the microprocessor MCU control and management circuit of Lian Jieing and the testing circuit of cell voltage and supply voltage, port (P+, P-) connect with charging DC-DC major loop, charging DC-DC major loop connects with microprocessor MCU control and management circuit.
Described charging DC-DC major loop comprises transistor Q1, Q2, Q3, field effect transistor U2A, resistance R 6, R7, R8, R11, the collector electrode of transistor Q1 connects with an end and the port P+ of resistance R 6, the other end of the base stage of transistor Q1 and resistance R 6, one end of the base stage of transistor Q2 and resistance R 8 connects, the grid of the emitter of transistor Q1 and field effect transistor U2A, the emitter of transistor Q2 connects, the drain electrode of the collector electrode of transistor Q2 and field effect transistor U2A, the emitter of transistor Q3 meets port P-after connecting, the collector electrode of transistor Q3 connects with the other end of resistance R 8, and the base stage of transistor Q3 connects with microprocessor MCU control and management circuit by resistance R 7.
Described microprocessor MCU control and management circuit is made up of the electric power management circuit of microprocessor MCU and microprocessor MCU, the electric power management circuit of microprocessor MCU comprises transistor Q4, Q5, Q6, Q7, resistance R 12, R24-R29, three-terminal voltage-stabilizing pipe U4, transistor Q5, Q6 forms mirror image circuit, the collector electrode of transistor Q5 connects with the base stage of transistor Q7 by resistance R 28, the base stage of transistor Q6 is in the same place with the collector electrode short circuit, the emitter of transistor Q6 connects with port B-, the emitter of transistor Q7 connects with port B+, its collector electrode connects with the collector electrode of transistor Q4, the base stage of transistor Q4 is connected to three-terminal voltage-stabilizing pipe U4, the emitter output 5V voltage of transistor Q4, the end of three-terminal voltage-stabilizing pipe U4 connects with the VREF end of microprocessor MCU by resistance R 24.
The utility model Ni-MH battery group charging circuit carries out constant current charge to Ni-MH battery, detect in the charging process supply voltage, cell voltage, charging current ,-parameter such as Δ V, battery temperature, take suitable protection according to the variation of parameter; The electric power management circuit of microprocessor MCU guarantees the normal power supply of microprocessor MCU and consumes minimum quiescent current at non operating state (discharge condition or inactive state) circuit, realizes discharging and recharging with end under the situation of low speed paper tape reader static power disspation.
Description of drawings
Accompanying drawing 1 is the utility model charging current feedback circuit and charging DC-DC major loop schematic diagram; Accompanying drawing 2 is the utility model microprocessor MCU circuit theory diagrams; Accompanying drawing 3 is electric power management circuit schematic diagrams of the utility model microprocessor MCU; Accompanying drawing 4 is testing circuit schematic diagrams of the utility model cell voltage and supply voltage.
Embodiment
The utility model preferred version is the charging circuit at 6～7 joint Ni-MH battery groups, comprise 6～7 joint Ni-MH battery and batteries charging management boards thereof, described batteries charging management board comprises the port (B+ that connects with battery, B-), the port (P+ that connects with adapter, P-), with port (B+, B-) the microprocessor MCU control and management circuit of Lian Jieing and the testing circuit of cell voltage and supply voltage, port (P+, P-) connect with charging DC-DC major loop, charging DC-DC major loop connects with microprocessor MCU control and management circuit.Power supply carries out constant current charge for 6～7 joint Ni-MH batteries through adapter input 9～15V voltage.
Be elaborated below with reference to accompanying drawing:
As shown in Figure 1, the utility model charging current feedback circuit and charging DC-DC major loop schematic diagram, charging DC-DC major loop comprises transistor Q1, Q2, Q3, field effect transistor U2A, resistance R 6, R7, R8, R11, the collector electrode of transistor Q1 connects with an end and the port P+ of resistance R 6, the other end of the base stage of transistor Q1 and resistance R 6, one end of the base stage of transistor Q2 and resistance R 8 connects, the grid of the emitter of transistor Q1 and field effect transistor U2A, the emitter of transistor Q2 connects, the drain electrode of the collector electrode of transistor Q2 and field effect transistor U2A, the emitter of transistor Q3 meets port P-after connecting, the collector electrode of transistor Q3 connects with the other end of resistance R 8, the base stage of transistor Q3 connects with microprocessor MCU control and management circuit by resistance R 7, one end of the source electrode of field effect transistor U2A and inductance L 1, the anode of diode D2 connects, the other end of inductance L 1 connects with the charging current feedback circuit, the negative electrode of diode D2 connects with port P+, and field effect transistor U2A adopts N-CHANNEL channel mosfet field effect transistor to finish the conversion of DC-DC.
The charging current feedback circuit is made up of operational amplifier U1B, resistance R 1-R5, R10, capacitor C 1 and diode D1, resistance R 10 is serially connected with between the L1 in port B-and the charging DC-DC major loop, 5 pin of operational amplifier U1B connect with the end of resistance R 1, R3,6 pin of operational amplifier U1B connect with an end of resistance R 10 by resistance R 4,7 pin of operational amplifier U1B connect with the IAD end of capacitor C 1, diode D1 and microprocessor MCU by resistance R 5, and resistance R 2 is serially connected with between 6 pin and 7 pin of operational amplifier U1B.
As shown in Figure 2, the utility model microprocessor MCU circuit theory diagrams, comprise microprocessor MCU U3 and peripheral circuit thereof, 1 pin of microprocessor MCU U3 is that end is gone in power supply 5V source, 6,9,10,11,13 pin are respectively pulse duration PWM end, VREF end, HVAD end, LVDC end and IAD end, described peripheral circuit comprises indicating circuit and regulating circuit, indicating circuit is serially connected with between 7,8 pin of microprocessor MCU U3, is made up of resistance R 31, LED 1, LED2, resistance R 32 that order links; Regulating circuit connects with 12 pin of microprocessor MCU U3, is made up of adjustable resistance R23, resistance R 22, capacitor C 8.
As shown in Figure 3, the electric power management circuit schematic diagram of the utility model microprocessor MCU, the electric power management circuit of microprocessor MCU comprises transistor Q4, Q5, Q6, Q7, resistance R 12, R24-R29, three-terminal voltage-stabilizing pipe U4, transistor Q5, Q6 forms mirror image circuit, the collector electrode of transistor Q5 connects with the base stage of transistor Q7 by resistance R 28, the base stage of transistor Q6 is in the same place with the collector electrode short circuit, the emitter of transistor Q6 connects with port B-, the emitter of transistor Q7 connects with port B+, its collector electrode connects with the collector electrode of transistor Q4, the base stage of transistor Q4 is connected to three-terminal voltage-stabilizing pipe U4, the emitter output 5V voltage of transistor Q4, the end of three-terminal voltage-stabilizing pipe U4 connects with the VREF end of microprocessor MCU by resistance R 24.
As shown in Figure 4, the testing circuit schematic diagram of the utility model cell voltage and supply voltage, described battery voltage detection circuit is made up of resistance R 16, R17, R18, capacitor C 5, one end of resistance R 16 connects with port B-, its other end connects with resistance R 17, R18 respectively, and resistance R 18 connects with the LV DC end of capacitor C 5 and microprocessor MCU; Described voltage detection circuit is made up of resistance R 13, R14, R15, capacitor C 4, one end of resistance R 13 connects with the DC of the electric power management circuit of microprocessor MCU end, its other end connects with resistance R 14, R15, and resistance R 15 connects with the HVAD end of capacitor C 4 and microprocessor MCU.
Discharge and recharge realization with end and ultralow quiescent dissipation, when at port (P+, when P-) the power supply input being arranged, if supply voltage is than cell voltage height, because port B-is to resistance R 10, inductance L 1 and field effect transistor U2A are arranged between the port P-, the resistance that about 0.15 Ω is arranged is at the voltage Vbp of port B-to port P-direction generation forward.Transistor Q5, Q6 forms mirror image circuit, the base stage B of Q6 is in the same place with collector electrode C short circuit, because the metering function of resistance R 12, the voltage control of transistor Q6 base stage is 0.5～0.6V (can adjust by the resistance of resistance R 12), be the base stage B of transistor Q6 with respect to the voltage of port B-at 0.5～0.6V, because the base stage of transistor Q5 and the base stage short circuit of transistor Q6, under the effect of Vbp, the base stage of transistor Q5 can reach 0.7V with respect to the voltage of port P-, can make transistor Q5 conducting, the voltage of the collector electrode C of transistor Q5 can drop to about 0.2V, the base stage B of transistor Q7 is by resistance R 28 like this, the approximate port P-(port P-is the ground of input power supply) that receives of R29, transistor Q7 conducting (in the actual measurement process after the Q7 conducting in its emitter E, the pressure drop of collector electrode C can think that the voltage that arrives Q4 after the Q7 conducting equals supply voltage between 0.01～0.015V).U4 is that reference voltage is the three-terminal voltage-stabilizing pipe of 2.5V, the voltage of voltage regulation of the feedback generation 5V by resistance R 25, R26 (as long as the voltage that arrives transistor Q4 collector electrode more than 6V, can both guarantee to produce stable 5V output).Microprocessor MCU U3 just can access stable 5V voltage like this, guarantees operate as normal.(P+ inserts power supply between P-) and charges from port in realization.
After power supply was taken away, port B-did not have electric current to port P-, at port (P+, when P-) not inserting load, Vbp=0 is when at port (P+, when P-) inserting load, since the sense of current be P-to B-, Vbp＜0, transistor Q5 can conducting like this, transistor Q7 can conducting yet, microprocessor MCU U3 can not obtain power supply, and this circuitry consumes electric current is minimum, has only about about 10uA.So just realized low quiescent dissipation.
At port (P+, P-) do not have between under the situation of power supply access, microprocessor MCU U3 can not obtain power supply, and the 6th pin level of microprocessor MCU U3 is 0, and transistor Q3 ends, the base stage of transistor Q1 and Q2 is a high voltage, transistor Q1 conducting, transistor Q2 ends, and the grid G of field effect transistor U2A is a high voltage, so the U2 conducting, circuit regular picture.(P+ discharges between P-), has realized discharging and recharging with end to be implemented in port like this
When at port (P+, P-) behind the access power supply, microprocessor MCU U3 normal power supply is when the 6th pin of microprocessor MCU U3 is exported height at ordinary times, transistor Q3 conducting, the base stage level of transistor Q2 and Q1 becomes low, transistor Q1 ends, transistor Q2 conducting, and the grid level of U2 is pulled low to 0, field effect transistor U2A ends, and charge circuit is cut off; On the contrary, when the 6th pin output low level of microprocessor MCUU3, field effect transistor U2A conducting.Like this, when field effect pipe U2A exports high-low level under the driving of the pwm signal of microprocessor MCU U3 output, field effect transistor U2A carries out switch apace, field effect transistor U2A is by the electric current in the charging current feedback circuit detection line, adjust the duty ratio of PWM, realize the control of DC-DC conversion and charging current.
Claims (7)
1, a kind of Ni-MH battery group charging circuit, comprise at least one group Ni-MH battery and batteries charging management board, described batteries charging management board comprises the port (B+ that connects with battery, B-), the port (P+ that connects with adapter, P-), with port (B+, B-) the microprocessor MCU control and management circuit of Lian Jieing and the testing circuit of cell voltage and supply voltage, it is characterized in that: port (P+, P-) connect with charging DC-DC major loop, charging DC-DC major loop connects with microprocessor MCU control and management circuit.
2, Ni-MH battery group charging circuit according to claim 1, it is characterized in that described charging DC-DC major loop comprises transistor Q1, Q2, Q3, field effect transistor U2A, resistance R 6, R7, R8, R11, the collector electrode of transistor Q1 connects with an end and the port (P+) of resistance R 6, the other end of the base stage of transistor Q1 and resistance R 6, one end of the base stage of transistor Q2 and resistance R 8 connects, the grid of the emitter of transistor Q1 and field effect transistor U2A, the emitter of transistor Q2 connects, the drain electrode of the collector electrode of transistor Q2 and field effect transistor U2A, the emitter of transistor Q3 connects port (P-) after connecting, the collector electrode of transistor Q3 connects with the other end of resistance R 8, and the base stage of transistor Q3 connects with microprocessor MCU control and management circuit by resistance R 7.
3, Ni-MH battery group charging circuit according to claim 2, it is characterized in that the source electrode of described field effect transistor U2A connects with an end of inductance L 1, the anode of diode D2, the other end of inductance L 1 connects with port (B-), and the negative electrode of diode D2 connects with port (P+).
4, Ni-MH battery group charging circuit according to claim 2 is characterized in that described field effect transistor U2A adopts N-CHANNEL channel mosfet field effect transistor.
5, Ni-MH battery group charging circuit according to claim 2, it is characterized in that described microprocessor MCU control and management circuit is made up of the electric power management circuit of microprocessor MCU and microprocessor MCU, the electric power management circuit of microprocessor MCU comprises transistor Q4, Q5, Q6, Q7, resistance R 12, R24-R29, three-terminal voltage-stabilizing pipe U4, transistor Q5, Q6 forms mirror image circuit, the collector electrode of transistor Q5 connects with the base stage of transistor Q7 by resistance R 28, the base stage of transistor Q6 is in the same place with the collector electrode short circuit, the emitter of transistor Q6 connects with port (B-), the emitter of transistor Q7 connects with port (B+), its collector electrode connects with the collector electrode of transistor Q4, the base stage of transistor Q4 is connected to three-terminal voltage-stabilizing pipe U4, the emitter output 5V voltage of transistor Q4, the end of three-terminal voltage-stabilizing pipe U4 connects with the VREF end of microprocessor MCU by resistance R 24.
6, Ni-MH battery group charging circuit according to claim 5, it is characterized in that described battery voltage detection circuit is made up of resistance R 16, R17, R18, capacitor C 5, one end of resistance R 16 connects with port (B-), its other end connects with resistance R 17, R18 respectively, and resistance R 18 connects with the LV DC end of capacitor C 5 and microprocessor MCU; Described voltage detection circuit is made up of resistance R 13, R14, R15, capacitor C 4, one end of resistance R 13 connects with the DC of the electric power management circuit of microprocessor MCU end, its other end connects with resistance R 14, R15, and resistance R 15 connects with the HVAD end of capacitor C 4 and microprocessor MCU.
7, Ni-MH battery group charging circuit according to claim 5, it is characterized in that described microprocessor MCU also connects with the charging current feedback circuit, described charging current feedback circuit is by operational amplifier U1B, resistance R 1-R5, R10, capacitor C 1 and diode D1 form, resistance R 10 is serially connected with between the L1 in port (B-) and the charging DC-DC major loop, 5 pin of operational amplifier U1B and resistance R 1, the end of R3 connects, 6 pin of operational amplifier U1B connect with an end of resistance R 10 by resistance R 4,7 pin of operational amplifier U1B are by resistance R 5 and capacitor C 1, the I AD end of diode D1 and microprocessor MCU connects, and resistance R 2 is serially connected with between 6 pin and 7 pin of operational amplifier U1B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620063855XU CN200944535Y (en) | 2006-08-31 | 2006-08-31 | Nickel-hydrogen battery charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620063855XU CN200944535Y (en) | 2006-08-31 | 2006-08-31 | Nickel-hydrogen battery charging circuit |
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| Publication Number | Publication Date |
|---|---|
| CN200944535Y true CN200944535Y (en) | 2007-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620063855XU Expired - Fee Related CN200944535Y (en) | 2006-08-31 | 2006-08-31 | Nickel-hydrogen battery charging circuit |
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| CN (1) | CN200944535Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244934A (en) * | 2015-07-30 | 2016-01-13 | 成都华立达电力信息系统有限公司 | Backup battery charging circuit |
| CN106972557A (en) * | 2017-03-18 | 2017-07-21 | 海汽电子技术芜湖股份有限公司 | Motor vehicle module NI MH battery intelligents charging circuits and charging implementation method |
| CN113675904A (en) * | 2021-01-04 | 2021-11-19 | 青岛鼎信通讯股份有限公司 | A nickel-hydrogen battery charge-discharge management circuit for gathering terminal |
-
2006
- 2006-08-31 CN CNU200620063855XU patent/CN200944535Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244934A (en) * | 2015-07-30 | 2016-01-13 | 成都华立达电力信息系统有限公司 | Backup battery charging circuit |
| CN105244934B (en) * | 2015-07-30 | 2018-04-10 | 成都华立达电力信息系统有限公司 | A kind of charging circuit of stand-by battery |
| CN106972557A (en) * | 2017-03-18 | 2017-07-21 | 海汽电子技术芜湖股份有限公司 | Motor vehicle module NI MH battery intelligents charging circuits and charging implementation method |
| CN106972557B (en) * | 2017-03-18 | 2024-03-15 | 海汽电子技术芜湖股份有限公司 | NI-MH battery intelligent charging circuit for automobile module and charging realization method |
| CN113675904A (en) * | 2021-01-04 | 2021-11-19 | 青岛鼎信通讯股份有限公司 | A nickel-hydrogen battery charge-discharge management circuit for gathering terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070905 Termination date: 20140831 |
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| EXPY | Termination of patent right or utility model |