CN202121344U - Chargeable battery device and charging switching circuit - Google Patents
Chargeable battery device and charging switching circuit Download PDFInfo
- Publication number
- CN202121344U CN202121344U CN2011201971090U CN201120197109U CN202121344U CN 202121344 U CN202121344 U CN 202121344U CN 2011201971090 U CN2011201971090 U CN 2011201971090U CN 201120197109 U CN201120197109 U CN 201120197109U CN 202121344 U CN202121344 U CN 202121344U
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- circuit
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- supply circuit
- lithium battery
- charging
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Abstract
The utility model provides a chargeable battery device and a charging switching circuit. The chargeable battery device comprises the charging switching circuit, a charging circuit, a DC power supply circuit and a lithium battery, the charging switching circuit is connected with the lithium battery and the DC power supply circuit separately, and comprises a P-channel type power MOS tube, a capacitor, a pulldown resistor and a diode. A drain D of the P-channel type power MOS tube is connected with the anode of the lithium battery, a grid G is connected with the anode of the DC power supply circuit, and a source electrode S is connected with a rear end circuit. In the utility model, firstly, the anode of the DC power supply circuit is connected with the pulldown resistor, and is connected with the grid G of the P-channel power MOS tube, and then is in series with the diode, and finally is connected with the rear end circuit.
Description
Technical field
The utility model is a kind of rechargeable battery equipment and charging commutation circuit about field of portable electronic apparatus concretely.
Background technology
Portable electric appts is because its portable, applied range receives a large amount of consumers' welcomes.In order to satisfy the function that it is carried, this kind equipment generally need be equipped with rechargeable battery as power supply, like chargeable lithium cell.
For the bigger portable set of power consumption, the charge ratio of lithium battery is crucial.Especially under the specific occasion, must guarantee system's operate as normal in the time of charging, lithium battery power supply is separated with DC power-supply circuit, does not interfere with one another.Simultaneously, after DC power-supply circuit broke off, lithium battery power supply must normal, the steady operation of assurance equipment.Existing way is at charging circuit and DC power-supply circuit front end polyphone diode, and is as shown in Figure 1, and charging circuit voltage is set is lower than DC power-supply circuit voltage.Because diode has unidirectional conduction, when being connected to DC power-supply circuit, with regard to the electric current of ability automatic disconnection lithium battery circuit and operating circuit.
But this charging modes existing problems, this be because: the tube voltage drop of diode is directly proportional with the electric current that flows through within the specific limits, and tube voltage drop is just very big when device current is big, can reach about 0.3V, thereby cause the loss of unnecessary battery power.
The utility model content
The purpose of the utility model is the deficiency that overcomes existing charging modes, reduces the front end loss of rechargeable battery equipment, and a kind of rechargeable battery equipment and charging commutation circuit are provided.
One of purpose of the utility model is, a kind of rechargeable battery equipment is provided, and comprises charging commutation circuit, charging circuit, DC power-supply circuit, lithium battery, and is as shown in Figure 2.The charging commutation circuit is connected respectively to lithium battery and DC power-supply circuit.
One of purpose of the utility model is, a kind of charging commutation circuit is provided, and comprises 1 P channel-type power mos pipe 102,1 pull down resistor 103 of 101,1 electric capacity and a diode 104, and is as shown in Figure 3; The drain D of P channel-type power mos pipe 101 links to each other with lithium battery anode, and grid G links to each other with DC power-supply circuit is anodal, and source S connects back-end circuit.The DC power-supply circuit positive pole connects pull down resistor 103 backs and is connected with P channel-type power mos tube grid G, and serial connection diode 104 backs connect back-end circuit.
After DC power-supply circuit was connected to charger, lithium battery voltage was 3.0V-4.2V, and DC power-supply circuit voltage is 4.8V-5.0V; Drop to more than the 4.5V through behind the diode 104; Be high potential at this moment because mos manages 101 grid G, so mos pipe 101 ends inner not conducting of PN junction diode.Simultaneously, in the front end charging circuit, DC power-supply circuit charges to lithium battery.This moment, DC power-supply circuit was the back-end circuit power supply.
After DC power-supply circuit was not connected to charger, lithium battery voltage was 3.0V-4.2V, and DC power-supply circuit voltage is 0; Because the PN junction diode current flow of mos pipe 101 inside; Thereby the source S current potential rises, and mos manages 101 conductings, and this moment, lithium battery was the back-end circuit power supply.
The beneficial effect of the utility model is: after the charging commutation circuit that employing the utility model provides, the mos tube voltage drop greatly reduces line loss in 0.05V.
Description of drawings
Fig. 1 is that sketch map is switched in the charging of existing rechargeable battery equipment;
Fig. 2 is the rechargeable battery device systems block diagram of the utility model;
Fig. 3 is the charging commutation circuit sketch map of the utility model.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment will be carried out clear, intactly description.
The rechargeable battery equipment of present embodiment comprises charging commutation circuit, charging circuit, DC power-supply circuit, lithium battery, and is as shown in Figure 2.The charging commutation circuit is connected respectively to lithium battery and DC power-supply circuit.
The charging commutation circuit of present embodiment comprises 1 P channel-type power mos pipe 102,1 pull down resistor 103 of 101,1 electric capacity and a diode 104; The drain D of P channel-type power mos pipe 101 links to each other with lithium battery anode, and grid G links to each other with DC power-supply circuit is anodal, and source S connects back-end circuit.The DC power-supply circuit positive pole connects pull down resistor 103 backs and is connected with P channel-type power mos tube grid G, and serial connection diode 104 backs connect back-end circuit.
After DC power-supply circuit was connected to charger, lithium battery voltage was 3.0V-4.2V, and DC power-supply circuit voltage is 4.8V-5.0V; Drop to more than the 4.5V through behind the diode 104; Be high potential at this moment because mos manages 101 grid G, so mos pipe 101 ends inner not conducting of PN junction diode.Simultaneously, in the front end charging circuit, DC power-supply circuit charges to lithium battery.This moment, DC power-supply circuit was the back-end circuit power supply.
After DC power-supply circuit was not connected to charger, lithium battery voltage was 3.0V-4.2V, and DC power-supply circuit voltage is 0; Because the PN junction diode current flow of mos pipe 101 inside; Thereby the source S current potential rises, and mos manages 101 conductings, and this moment, lithium battery was the back-end circuit power supply.Therefore mos pipe tube voltage drop greatly reduces line loss in 0.05V.
Above embodiment only is used to explain the utility model, but not is used to limit the utility model.
Claims (2)
1. a rechargeable battery equipment is characterized in that, described rechargeable battery equipment comprises charging commutation circuit, charging circuit, DC power-supply circuit, lithium battery, and described charging commutation circuit is connected respectively to lithium battery and DC power-supply circuit.
2. a charging commutation circuit is characterized in that described charging commutation circuit comprises 1 P channel-type power mos pipe, 1 electric capacity, 1 pull down resistor and a diode;
The drain D of described P channel-type power mos pipe links to each other with lithium battery anode, and grid G links to each other with DC power-supply circuit is anodal, and source S connects back-end circuit;
Described DC power-supply circuit positive pole is connected with P channel-type power mos tube grid G after connecing pull down resistor, connects back-end circuit behind the serial connection diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201971090U CN202121344U (en) | 2011-06-13 | 2011-06-13 | Chargeable battery device and charging switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201971090U CN202121344U (en) | 2011-06-13 | 2011-06-13 | Chargeable battery device and charging switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202121344U true CN202121344U (en) | 2012-01-18 |
Family
ID=45462381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201971090U Expired - Lifetime CN202121344U (en) | 2011-06-13 | 2011-06-13 | Chargeable battery device and charging switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202121344U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245214A (en) * | 2015-11-12 | 2016-01-13 | 郑州雅晨生物科技有限公司 | Battery switching circuit |
| CN106786869A (en) * | 2016-12-16 | 2017-05-31 | 深圳市亿道数码技术有限公司 | A kind of charging automatic identification switching circuit |
-
2011
- 2011-06-13 CN CN2011201971090U patent/CN202121344U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245214A (en) * | 2015-11-12 | 2016-01-13 | 郑州雅晨生物科技有限公司 | Battery switching circuit |
| CN106786869A (en) * | 2016-12-16 | 2017-05-31 | 深圳市亿道数码技术有限公司 | A kind of charging automatic identification switching circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |
|
| CX01 | Expiry of patent term |