CN203233151U - A charging protection circuit - Google Patents
A charging protection circuit Download PDFInfo
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- CN203233151U CN203233151U CN201320165871XU CN201320165871U CN203233151U CN 203233151 U CN203233151 U CN 203233151U CN 201320165871X U CN201320165871X U CN 201320165871XU CN 201320165871 U CN201320165871 U CN 201320165871U CN 203233151 U CN203233151 U CN 203233151U
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Abstract
Provided is a charging protection circuit which comprises a battery, a charging protection part, a discharging protection part, a charging circuit, and a discharging circuit. The charging circuit, the charging protection part, the battery, the discharging protection part, and the discharging circuit are connected successively. The charging circuit is connected with an external power supply. The charging protection circuit has a beneficial effect that acquiring and analyzing the information of charging current and discharging current, the charging protection circuit effectively judges the charging case of the battery and protects the battery and a charging device.
Description
Technical field
The utility model relates to electronic applications, particularly a kind of charge protector.
Background technology
The extensive use of rechargeable battery has solved problems such as short, waste resource in disposable battery useful life, waste battery be difficult, but still can occur 2 problems when rechargeable battery charged: the one, and the charging device complex structure, circuit is loaded down with trivial details, power consumption is big; The 2nd, long-time charging can cause battery and charging device heating, causes potential safety hazard.
Summary of the invention
For overcoming the above problems, the utility model designs a kind of secondary battery protective circuit.
The technical scheme that the utility model adopts is: a kind of charge protector, comprise battery, charge protection part, discharge prevention part, charging circuit, discharge circuit, and described charging circuit is connected with external power supply
Described charging circuit, charge protection part, battery, discharge prevention part, discharge circuit link to each other successively.
In the described charging circuit, 3,4 pin of the sub-J1 of power access end link to each other and insert the positive pole of power supply, the continuous negative pole of power supply that inserts of 1,2 pin of J1 is as the reference ground of entire circuit, one of the positive pole of electrochemical capacitor C1, patch capacitor C2 terminates to 3,4 pin of J1 as the input VIN of charging circuit, another termination of the negative pole of C1, C2 is with reference to ground, the D utmost point of N-channel MOS pipe Q1 meets VIN, the S utmost point links to each other with an end of inductance L 1, the negative pole of diode D1, and the G utmost point inserts the switch that pwm signal is controlled metal-oxide-semiconductor; The positive pole of D1 is received with reference to ground; The other end of L1 links to each other with the end of patch capacitor C3, as the cathode output end of charging circuit; Another termination of C3 is with reference to ground.
In the described charge protection part, an end of resistance R 1 links to each other with the S utmost point, the charging circuit cathode output end of P channel MOS tube Q2, and the other end of R1 links to each other with resistance R 2; The other end of R2 is received the collector electrode of NPN triode Q4; The G utmost point of Q2 is received R1, the R2 end that is connected, and the D utmost point links to each other with the end of R3, the positive pole of battery; Another termination of R3 is with reference to ground; The emitter of Q4 connects with reference to ground, the base stage of Q4 is received the I/O port RC0 of governor circuit MCU, sampling resistor RS1 one terminates to battery cathode, another termination is with reference to ground, the voltage signal VI that collects from battery cathode inserts the positive input OPA1+ of the operational amplifier 1 of governor circuit MCU, through amplification, the RC filtering of operational amplifier, read in the A/D input AN0 of MCU.
In the described discharge prevention part, the S of an end of the negative pole of diode D2, resistance R 4, P channel MOS tube Q3 is extremely continuous; The other end of R4 links to each other with resistance R 5; The other end of R5 connects the collector electrode of NPN triode Q5; The emitter of Q5 connects with reference to ground, and base stage is linked the I/O port RC1 of governor circuit MCU; The G utmost point of Q3 is linked the link of R4, R5, and the D utmost point of Q3, an end of resistance R 6 are linked the end of discharge load resistance R L; Another termination of R6 is with reference to ground, the end of the termination load resistance RL of sampling resistor RS2, the negative pole of another termination battery of RS2, the voltage signal VO that gathers from load resistance RL and sampling resistor RS2 junction inserts the positive input OPA2+ of the operational amplifier 2 of governor circuit MCU, through reading in the A/D input AN12 of MCU after the amplification of operational amplifier, the RC filtering.
In the described discharge circuit, the positive pole of diode D2 is linked the positive pole of battery, and the negative pole of D2 is received an end of the resistance R 4 of discharge control switch circuit; Through charge/discharge control circuit, the end of the terminating resistor R6 of discharge load resistance R L, the end of the other end connecting resistance RS2 of RL.
The utility model charge protector is effectively judged the charge condition of battery by adopting information gathering and the analysis to charging and discharging current, and battery and charging device are protected.
Description of drawings
Fig. 1 is theory structure block diagram of the present utility model;
Fig. 2 is charging circuit described in the utility model, the circuit theory diagrams of laying special stress on protecting circuit;
Fig. 3 is discharge circuit described in the utility model, put the circuit theory diagrams of point protection circuit;
Fig. 4 is the circuit theory diagrams of charge protection part described in the utility model;
Fig. 5 is the circuit theory diagrams of discharge prevention part described in the utility model.
Embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further specify the utility model and how to realize.
As shown in Figure 1, a kind of charge protector comprises battery, charge protection part, discharge prevention part, charging circuit, puts dot circuit.Described charging circuit, charge protection part, battery, discharge prevention part, put dot circuit and link to each other successively, described charging circuit is connected with external power supply.
As Fig. 2, shown in Figure 4, in the described charging circuit, 3,4 pin of the sub-J1 of power access end link to each other and insert the positive pole of power supply, and the continuous negative pole of power supply that inserts of 1,2 pin of J1 is as the reference ground of entire circuit.One of the positive pole of electrochemical capacitor C1, patch capacitor C2 terminates to 3,4 pin of J1 as the input VIN of charging circuit, another termination of the negative pole of C1, C2 is with reference to ground, the D utmost point of N-channel MOS pipe Q1 meets VIN, the S utmost point links to each other with an end of inductance L 1, the negative pole of diode D1, and the G utmost point inserts the switch that pwm signal is controlled metal-oxide-semiconductor; The positive pole of D1 is received with reference to ground; The other end of L1 links to each other with the end of patch capacitor C3, as the cathode output end of charging circuit; Another termination of C3 is with reference to ground.
In the described charge protection part, an end of resistance R 1 links to each other with the S utmost point, the charging circuit cathode output end of P channel MOS tube Q2, and the other end of R1 links to each other with resistance R 2; The other end of R2 is received the collector electrode of NPN triode Q4; The G utmost point of Q2 is received R1, the R2 end that is connected, and the D utmost point links to each other with the end of R3, the positive pole of battery; Another termination of R3 is with reference to ground; The emitter of Q4 connects with reference to ground, the base stage of Q4 is received the I/O port RC0 of governor circuit MCU, sampling resistor RS1 one terminates to battery cathode, another termination is with reference to ground, the voltage signal VI that collects from battery cathode inserts the positive input OPA1+ of the operational amplifier 1 of governor circuit MCU, through amplification, the RC filtering of operational amplifier, read in the A/D input AN0 of MCU.
As Fig. 3, shown in Figure 5, in the described discharge prevention part, the S of an end of the negative pole of diode D2, resistance R 4, P channel MOS tube Q3 is extremely continuous; The other end of R4 links to each other with resistance R 5; The other end of R5 connects the collector electrode of NPN triode Q5; The emitter of Q5 connects with reference to ground, and base stage is linked the I/O port RC1 of governor circuit MCU; The G utmost point of Q3 is linked the link of R4, R5, and the D utmost point of Q3, an end of resistance R 6 are linked the end of discharge load resistance R L; Another termination of R6 is with reference to ground, the end of the termination load resistance RL of sampling resistor RS2, the negative pole of another termination battery of RS2, the voltage signal VO that gathers from load resistance RL and sampling resistor RS2 junction inserts the positive input OPA2+ of the operational amplifier 2 of governor circuit MCU, through reading in the A/D input AN12 of MCU after the amplification of operational amplifier, the RC filtering.
In the described discharge circuit, the positive pole of diode D2 is linked the positive pole of battery, and the negative pole of D2 is received an end of the resistance R 4 of discharge control switch circuit; Through charge/discharge control circuit, the end of the terminating resistor R6 of discharge load resistance R L, the end of the other end connecting resistance RS2 of RL.
Technique scheme has only embodied the optimal technical scheme of technical solutions of the utility model; those skilled in the art to some part wherein some changes that may make all embodied principle of the present utility model, belong within the protection range of the present utility model.
Claims (5)
1. charge protector; comprise battery, charge protection part, discharge prevention part, charging circuit, discharge circuit; it is characterized in that; described charging circuit, charge protection part, battery, discharge prevention part, discharge circuit link to each other successively, and described charging circuit is connected with external power supply.
2. charge protector according to claim 1, it is characterized in that, in the described charging circuit, 3 of the sub-J1 of power access end, 4 pin link to each other and insert the positive pole of power supply, 1 of J1, the continuous negative pole of power supply that inserts of 2 pin is as the reference ground of entire circuit, the positive pole of electrochemical capacitor C1, one of patch capacitor C2 terminates to 3 of J1,4 pin are as the input VIN of charging circuit, the negative pole of C1, another termination of C2 is with reference to ground, the D utmost point of N-channel MOS pipe Q1 meets VIN, one end of the S utmost point and inductance L 1, the negative pole of diode D1 links to each other, and the G utmost point inserts the switch that pwm signal is controlled metal-oxide-semiconductor; The positive pole of D1 is received with reference to ground; The other end of L1 links to each other with the end of patch capacitor C3, as the cathode output end of charging circuit; Another termination of C3 is with reference to ground.
3. charge protector according to claim 1 is characterized in that, in the described charge protection part, an end of resistance R 1 links to each other with the S utmost point, the charging circuit cathode output end of P channel MOS tube Q2, and the other end of R1 links to each other with resistance R 2; The other end of R2 is received the collector electrode of NPN triode Q4; The G utmost point of Q2 is received R1, the R2 end that is connected, and the D utmost point links to each other with the end of R3, the positive pole of battery; Another termination of R3 is with reference to ground; The emitter of Q4 connects with reference to ground, the base stage of Q4 is received the I/O port RC0 of governor circuit MCU, sampling resistor RS1 one terminates to battery cathode, another termination is with reference to ground, the voltage signal VI that collects from battery cathode inserts the positive input OPA1+ of the operational amplifier 1 of governor circuit MCU, through amplification, the RC filtering of operational amplifier, read in the A/D input AN0 of MCU.
4. charge protector according to claim 1 is characterized in that, in the described discharge prevention part, the S of an end of the negative pole of diode D2, resistance R 4, P channel MOS tube Q3 is extremely continuous; The other end of R4 links to each other with resistance R 5; The other end of R5 connects the collector electrode of NPN triode Q5; The emitter of Q5 connects with reference to ground, and base stage is linked the I/O port RC1 of governor circuit MCU; The G utmost point of Q3 is linked the link of R4, R5, and the D utmost point of Q3, an end of resistance R 6 are linked the end of discharge load resistance R L; Another termination of R6 is with reference to ground, the end of the termination load resistance RL of sampling resistor RS2, the negative pole of another termination battery of RS2, the voltage signal VO that gathers from load resistance RL and sampling resistor RS2 junction inserts the positive input OPA2+ of the operational amplifier 2 of governor circuit MCU, through reading in the A/D input AN12 of MCU after the amplification of operational amplifier, the RC filtering.
5. charge protector according to claim 1 is characterized in that, in the described discharge circuit, the positive pole of diode D2 is linked the positive pole of battery, and the negative pole of D2 is received an end of the resistance R 4 of discharge control switch circuit; Through charge/discharge control circuit, the end of the terminating resistor R6 of discharge load resistance R L, the end of the other end connecting resistance RS2 of RL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320165871XU CN203233151U (en) | 2013-04-03 | 2013-04-03 | A charging protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320165871XU CN203233151U (en) | 2013-04-03 | 2013-04-03 | A charging protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203233151U true CN203233151U (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320165871XU Expired - Fee Related CN203233151U (en) | 2013-04-03 | 2013-04-03 | A charging protection circuit |
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| CN (1) | CN203233151U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020181437A1 (en) * | 2019-03-08 | 2020-09-17 | Oppo广东移动通信有限公司 | Cell protection circuit and electronic device |
-
2013
- 2013-04-03 CN CN201320165871XU patent/CN203233151U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020181437A1 (en) * | 2019-03-08 | 2020-09-17 | Oppo广东移动通信有限公司 | Cell protection circuit and electronic device |
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| Date | Code | Title | Description |
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| DD01 | Delivery of document by public notice |
Addressee: Tianjin Shangzhou Technology Co., Ltd. Document name: Notification to Go Through Formalities of Registration |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Tianjin Shangzhou Technology Co., Ltd. Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice |
Addressee: Tianjin Shangzhou Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20150403 |
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| EXPY | Termination of patent right or utility model |