CN202111497U - Program-controlled charging circuit for nickel-metal hydride battery - Google Patents
Program-controlled charging circuit for nickel-metal hydride battery Download PDFInfo
- Publication number
- CN202111497U CN202111497U CN2011202147727U CN201120214772U CN202111497U CN 202111497 U CN202111497 U CN 202111497U CN 2011202147727 U CN2011202147727 U CN 2011202147727U CN 201120214772 U CN201120214772 U CN 201120214772U CN 202111497 U CN202111497 U CN 202111497U
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- battery
- triode
- charge
- switch
- mode control
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Abstract
The utility model provides a program-controlled charging circuit for a nickel-metal hydride battery. The program-controlled charging circuit comprises a charging power supply, a battery to be charged, a charging switch, a charging mode control module and a singlechip, wherein the charging mode control module is used for charging the battery to be charged through a diode; the charging switch comprises a switch triode of which a base electrode is connected with the singlechip through a first divider resistor; the charging mode control module comprises a voltage stabilizing chip, and the voltage stabilizing chip is connected with an MOS (Metal Oxide Semiconductor) tube and is also connected with a first current limiting resistor and a mode control triode; the base electrode of the mode control triode is connected with the singlechip, and a third current limiting resistor is arranged between the base electrode and an emitting electrode of the mode control triode; and both the first current limiting resistor and a second current limiting resistor are connected with an anode of the diode, and a shunt resistor is also arranged between a G electrode of the MOS tube and the anode of the diode. The program-controlled charging circuit has the advantage of capability of charging the battery by the charging power supply in case of insufficient voltage of the battery and selecting different currents to charge the battery according to electric quantity of the battery so as to prevent the battery from being overcharged.
Description
Technical field
The utility model relates to a kind of program control charging circuit that is used for Ni-MH battery.
Background technology
Ni-MH battery is to have hydrogen ion and metallic nickel to synthesize, and the electric weight deposit is more than nickel-cadmium cell, and is lighter than nickel-cadmium cell, and useful life is also longer, and environmentally safe.The shortcoming of Ni-MH battery is that price is expensive more a lot of than nickel-cadmium cell, and performance is than lithium battery difference.What Ni-MH battery was used in productive life also comes the moon extensively.As a kind of rechargeable battery, often be applied in some independent intelligent equipment.Therefore the design of charging circuit is relatively more crucial.
Summary of the invention
The purpose of the utility model is to provide a kind of and when cell voltage is not enough, through charge power supply battery is charged, and can select different electric currents to battery charge according to battery electric quantity, guarantees the program control charging circuit that is used for Ni-MH battery that battery is not overcharged.
Be used for the program control charging circuit of Ni-MH battery, comprise charge power supply, battery to be charged, the charge switch that is connected with charge power supply, the charge mode control module of connection charge switch and battery to be charged, and the single-chip microcomputer of judging the virtual voltage of battery to be charged;
Described charge switch and charge mode control module are controlled by described single-chip microcomputer, and described charge mode control module is passed through diode to battery charge to be charged;
Described charge switch comprises metal-oxide-semiconductor that is connected with charge power supply and the switch triode that is connected with the G utmost point of metal-oxide-semiconductor; The collector electrode of described switch triode is connected with the described metal-oxide-semiconductor G utmost point; The base stage of described switch triode is connected with first pulse output end of single-chip microcomputer through first divider resistance; When described single-chip microcomputer is exported high level, described switch triode conducting;
Described charge mode control module comprises the voltage stabilizing chip that is connected with the metal-oxide-semiconductor G utmost point; The input of described voltage stabilizing chip is connected with the described metal-oxide-semiconductor G utmost point; First output of described voltage stabilizing chip is connected with first current-limiting resistance; Be provided with second current-limiting resistance between second output of described voltage stabilizing chip and described first current-limiting resistance, described voltage stabilizing chip second output is connected with the collector electrode of pattern control triode;
The grounded emitter of described pattern control triode; The base stage of described pattern control triode is connected with second pulse output end of described single-chip microcomputer through second divider resistance, is provided with the 3rd current-limiting resistance between the base stage of described pattern control triode and the emitter;
Described first current-limiting resistance all is connected with the positive pole of described diode with second current-limiting resistance, also is provided with shunt resistance between the described metal-oxide-semiconductor G utmost point and the diode cathode.
The technical conceive of the utility model is: when single-chip microcomputer detects the brownout of battery to be charged; Single-chip microcomputer sends high level to the base stage of switch triode; Thereby the switch triode conducting drags down the level of the metal-oxide-semiconductor G utmost point; The metal-oxide-semiconductor conducting, this moment, the power supply one tunnel of charge power supply was delivered to diode through shunt resistance, and another road gets into the voltage stabilizing chip.
Get into one road electric current of voltage stabilizing chip; When the base stage of pattern control triode is low level; Pattern control triode ends, this moment electric current from first output, flow into diode through first current-limiting resistance, diode current flow, treat rechargeable battery and carry out large current charge.
When the base stage when pattern control triode is high level; The conducting of pattern control triode; The road electric current that gets into the voltage stabilizing chip this moment is controlled triode to the ground earial drainage through pattern, and the road electric current that has only the process shunt resistance this moment is through diode pair battery charge to be charged.And the resistance of shunt resistance is very big, then treats the rechargeable battery charging with little electric current this moment.
When the voltage that detects battery to be charged when single-chip microcomputer has arrived threshold voltage, send low level to the base stage of switch triode, this moment, switch triode ended, and metal-oxide-semiconductor ends, and stops to treat each other the rechargeable battery charging.
The utlity model has when cell voltage is not enough and battery is charged, and can select different electric currents to battery charge, guarantee the advantage that battery is not overcharged according to battery electric quantity through charge power supply.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Embodiment
With reference to accompanying drawing, further specify the utility model:
The program control charging circuit that is used for Ni-MH battery; Comprise charge power supply POWER, battery J1 to be charged, the charge switch that is connected with charge power supply POWER; The charge mode control module that connects charge switch and battery to be charged, and the single-chip microcomputer of judging the virtual voltage of battery to be charged;
Described charge switch and charge mode control module are controlled by described single-chip microcomputer, and described charge mode control module is passed through diode to battery charge to be charged;
Described charge switch comprises metal-oxide-semiconductor Q1 that is connected with charge power supply and the switch triode Q2 that is connected with the G utmost point of metal-oxide-semiconductor; The collector electrode of described switch triode Q2 is connected with the described metal-oxide-semiconductor G utmost point; The base stage of described switch triode Q2 is connected with first pulse output end of single-chip microcomputer through the first divider resistance R2; When described single-chip microcomputer is exported high level, described switch triode Q2 conducting;
Described charge mode control module comprises the voltage stabilizing chip LM317 that is connected with the metal-oxide-semiconductor G utmost point; The input Vin of described voltage stabilizing chip LM317 is connected with the described metal-oxide-semiconductor G utmost point; The first output end vo ut of described voltage stabilizing chip LM317 is connected with the first current-limiting resistance R5; Be provided with the second current-limiting resistance R8 between the second output terminals A DJ of described voltage stabilizing chip LM317 and the described first current-limiting resistance R5, the described voltage stabilizing chip LM317 second output terminals A DJ is connected with the collector electrode of pattern control triode Q3;
The grounded emitter of described pattern control triode Q3; The base stage of described pattern control triode Q3 is connected with second pulse output end of described single-chip microcomputer through the second divider resistance R4, is provided with the 3rd current-limiting resistance R7 between the base stage of described pattern control triode Q3 and the emitter;
The described first current-limiting resistance R5 all is connected with the positive pole of described diode D1 with the second current-limiting resistance R8, also is provided with shunt resistance R1 between the described metal-oxide-semiconductor G utmost point and the diode D1 positive pole.
The technical conceive of the utility model is: when single-chip microcomputer detects the brownout of battery to be charged; Single-chip microcomputer sends high level to the base stage of switch triode; Thereby the switch triode conducting drags down the level of the metal-oxide-semiconductor G utmost point; The metal-oxide-semiconductor conducting, this moment, the power supply one tunnel of charge power supply was delivered to diode through shunt resistance, and another road gets into the voltage stabilizing chip.
Get into one road electric current of voltage stabilizing chip; When the base stage of pattern control triode is low level; Pattern control triode ends, this moment electric current from first output, flow into diode through first current-limiting resistance, diode current flow, treat rechargeable battery and carry out large current charge.
When the base stage when pattern control triode is high level; The conducting of pattern control triode; The road electric current that gets into the voltage stabilizing chip this moment is controlled triode to the ground earial drainage through pattern, and the road electric current that has only the process shunt resistance this moment is through diode pair battery charge to be charged.And the resistance of shunt resistance is very big, then treats the rechargeable battery charging with little electric current this moment.
When the voltage that detects battery to be charged when single-chip microcomputer has arrived threshold voltage, send low level to the base stage of switch triode, this moment, switch triode ended, and metal-oxide-semiconductor ends, and stops to treat each other the rechargeable battery charging.
The utlity model has when cell voltage is not enough and battery is charged, and can select different electric currents to battery charge, guarantee the advantage that battery is not overcharged according to battery electric quantity through charge power supply.
The described content of this specification embodiment only is enumerating the way of realization of utility model design; The protection range of the utility model should not be regarded as and only limit to the concrete form that embodiment states, the protection range of the utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (1)
1. the program control charging circuit that is used for Ni-MH battery; It is characterized in that: comprise charge power supply, battery to be charged, the charge switch that is connected with charge power supply; The charge mode control module that connects charge switch and battery to be charged, and the single-chip microcomputer of judging the virtual voltage of battery to be charged;
Described charge switch and charge mode control module are controlled by described single-chip microcomputer, and described charge mode control module is passed through diode to battery charge to be charged;
Described charge switch comprises metal-oxide-semiconductor that is connected with charge power supply and the switch triode that is connected with the G utmost point of metal-oxide-semiconductor; The collector electrode of described switch triode is connected with the described metal-oxide-semiconductor G utmost point; The base stage of described switch triode is connected with first pulse output end of single-chip microcomputer through first divider resistance; When described single-chip microcomputer is exported high level, described switch triode conducting;
Described charge mode control module comprises the voltage stabilizing chip that is connected with the metal-oxide-semiconductor G utmost point; The input of described voltage stabilizing chip is connected with the described metal-oxide-semiconductor G utmost point; First output of described voltage stabilizing chip is connected with first current-limiting resistance; Be provided with second current-limiting resistance between second output of described voltage stabilizing chip and described first current-limiting resistance, described voltage stabilizing chip second output is connected with the collector electrode of pattern control triode;
The grounded emitter of described pattern control triode; The base stage of described pattern control triode is connected with second pulse output end of described single-chip microcomputer through second divider resistance, is provided with the 3rd current-limiting resistance between the base stage of described pattern control triode and the emitter;
Described first current-limiting resistance all is connected with the positive pole of described diode with second current-limiting resistance, also is provided with shunt resistance between the described metal-oxide-semiconductor G utmost point and the diode cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202147727U CN202111497U (en) | 2011-06-22 | 2011-06-22 | Program-controlled charging circuit for nickel-metal hydride battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202147727U CN202111497U (en) | 2011-06-22 | 2011-06-22 | Program-controlled charging circuit for nickel-metal hydride battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202111497U true CN202111497U (en) | 2012-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202147727U Expired - Lifetime CN202111497U (en) | 2011-06-22 | 2011-06-22 | Program-controlled charging circuit for nickel-metal hydride battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202111497U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332735A (en) * | 2011-06-22 | 2012-01-25 | 杭州炬华科技股份有限公司 | Program controlled charging circuit for nickel-hydrogen battery |
-
2011
- 2011-06-22 CN CN2011202147727U patent/CN202111497U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332735A (en) * | 2011-06-22 | 2012-01-25 | 杭州炬华科技股份有限公司 | Program controlled charging circuit for nickel-hydrogen battery |
| CN102332735B (en) * | 2011-06-22 | 2013-06-05 | 杭州炬华科技股份有限公司 | Program controlled charging circuit for nickel-hydrogen battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120111 Effective date of abandoning: 20130605 |
|
| RGAV | Abandon patent right to avoid regrant |