CN205160169U - Charging and discharging circuit and chargeable IC -card - Google Patents
Charging and discharging circuit and chargeable IC -card Download PDFInfo
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- CN205160169U CN205160169U CN201521010408.3U CN201521010408U CN205160169U CN 205160169 U CN205160169 U CN 205160169U CN 201521010408 U CN201521010408 U CN 201521010408U CN 205160169 U CN205160169 U CN 205160169U
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Abstract
The utility model discloses a charging and discharging circuit and chargeable IC -card, a serial communication port, include: DC power supply, switching voltae regulator, electric current adjusting module and electric core, the input of switching voltae regulator with DC power supply connects, electric current adjusting module sets up enhancement mode PMOS pipe, electric current adjusting module's input with the output of switching voltae regulator is connected, the electricity core the input with electric current adjusting module's output is connected. The utility model discloses an enhancement mode PMOS pipe does not have the trickle charge stage, and electric core charges with ending promptly to specified peak voltage and charges, has simplified the circuit like this, has reduced the cost of IC -card.
Description
Technical field
The utility model relates to technical field of electricity, especially relates to a kind of charge-discharge circuit and chargeable IC-card.
Background technology
The charge-discharge circuit of general portable rechargeable equipment is formed by three parts: DC power supply, charge management circuit, charge-discharge protection circuit; wherein DC power supply is independent of outside rechargeable devices; can be AC-DC adapter or charger baby; require that the output voltage of adapter or charger baby must higher than battery core rated voltage; when adapter or charger baby output voltage are lower than battery core rated voltage, charging can not be realized.The function of charge management circuit is the accurate control of charging curve realization to charging current by battery core, generally comprises pre-charging stage, the quick charge stage, the trickle charge stage.Precharge and quick charge stage are CC charge mode, but charging current is different, and the trickle charge stage is CV charge mode.Battery core is charged to safe voltage with a certain small electric stream by pre-charging stage, then enters the quick charge stage.Some new formula battery core can skip over pre-charging stage, directly enters the quick charge stage.The trickle charge stage with battery core rated maximum voltage to battery core constant voltage charge until charging current is less than a certain set point, charge cutoff, after trickle charge terminates, battery core is filled full completely.
Current adjustment in charge management circuit is generally adopt special charge management circuit, and possess accurate charging current management function, pre-charge current, fast charging current, constant voltage charge electric current all pre-set adjustment by resistance.But the Charge Management IC category in the market for low capacity lithium cell is few, and on the high side, for the case of cost sensitivity, which is not suitable for.
Utility model content
The technical problem that the utility model mainly solves is to provide a kind of charge-discharge circuit and chargeable IC-card, the utility model adopts enhancement mode PMOS, and do not have the trickle charge stage, battery core is charged to rated maximum voltage and namely ends charging, which simplify circuit, reduce the cost of IC-card.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of charge-discharge circuit, is characterized in that, comprising: DC power supply, switching regulator, current regulating module and battery core; The input of described switching regulator is connected with described DC power supply; Described current regulating module arranges enhancement mode PMOS, and the input of described current regulating module is connected with the output of described switching regulator; The input of described battery core is connected with the output of described current regulating module.
Wherein, described enhancement mode PMOS is provided with S pole, G pole and D pole.
Wherein, described current regulating module also comprises diode, and the input of described diode is connected with described switching regulator, and the output of described diode is connected with described S pole.
Wherein, described current regulating module also comprises resistance, and the two ends of described resistance are connected with described S pole and G pole respectively.
Wherein, the output of the very described enhancement mode PMOS of described D, described D pole is connected with the input of described battery core.
Wherein, described charge-discharge circuit also comprises detection module, and described detection module is connected with described battery core, for detecting voltage or the electric current of described battery core.
Wherein, described charge-discharge circuit also comprises overdischarge and short circuit protection module, and described overdischarge and short circuit protection module are connected with described detection module.
Wherein, described charge-discharge circuit also comprises additives for overcharge protection module, and described additives for overcharge protection module is connected with described detection module.
Wherein, described overdischarge and short circuit protection module and additives for overcharge protection module are respectively arranged with NMOS tube.
For solving the problem, the utility model also provides chargeable IC-card, and described chargeable IC-card comprises the charge-discharge circuit described in above-mentioned utility model content.
The beneficial effects of the utility model are: the situation being different from prior art, and adopt enhancement mode PMOS, do not have the trickle charge stage, battery core is charged to rated maximum voltage and namely ends charging, which simplify circuit, reduces the cost of IC-card.
Accompanying drawing explanation
Fig. 1 is the block diagram of charge-discharge circuit in the utility model execution mode;
Fig. 2 is the circuit diagram of enhancement mode PMOS in the utility model execution mode.
Description of reference numerals: 11, DC power supply; 12, switching regulator; 13, current regulating module; 131, enhancement mode PMOS; 1311, S pole; 1312, G pole; 1313, D pole; 132, diode; 133, resistance; 14, battery core; 15, detection module; 16, overdischarge and short circuit protection module; 17, additives for overcharge protection module; 18, earth terminal; 19, NMOS tube.
Embodiment
For the ease of understanding the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in detail.It should be noted that, when element is stated " being fixed on " another element, it can directly on another element or can there is one or more element placed in the middle therebetween.When an element is stated " connection " another element, it can be directly connected to another element or can there is one or more element placed in the middle therebetween.The term " vertical " that this specification uses, " level ", "left", "right" and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology of using of this specification and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in specification of the present utility model in this specification just in order to describe concrete execution mode is not for limiting the utility model.The term "and/or" that this specification uses comprises arbitrary and all combinations of one or more relevant Listed Items.
Consult Fig. 1, a kind of charge-discharge circuit, is characterized in that, comprising: DC power supply 11, switching regulator 12, current regulating module 13 and battery core 14; The input of switching regulator 12 is connected with DC power supply 11; Current regulating module 13 arranges enhancement mode PMOS, and the input of current regulating module 13 is connected with the output of switching regulator 12; The input of battery core 14 is connected with the output of current regulating module 13.
As shown in Figure 2, enhancement mode PMOS 131 is provided with S pole 1311, G pole 1312 and D pole 1313.When adopting enhancement mode PMOS, do not have the trickle charge stage, battery core 14 is charged to rated maximum voltage and namely ends charging, and the advantage done like this to simplify circuit, reduces the cost of charge-discharge circuit, realizes simple current management function.
Consult Fig. 2, current regulating module 13 also comprises diode 132, and the input of diode 132 is connected with switching regulator 12, and the output of diode 13 is connected with S pole 1311, and in figure, diode 13 to be put upside down electricity for preventing battery core.
In the utility model, current regulating module 13 also comprises resistance 133, and the two ends of resistance 133 are connected with S pole 1311 and G pole 1312 respectively.Regulated the voltage at S pole 1311 and two ends, G pole by the resistance changing resistance 133, and then regulate pre-charge current and the fast charging current of battery core.
In the utility model, D pole 1313 is the output of enhancement mode PMOS 131, and D pole 1313 is connected with the input of battery core 14.By G pole 1312 current potential of resistance 133 dividing potential drop adjustment enhancement mode PMOS, the electric current flowing through enhancement mode PMOS 131 is different and different with the voltage between G pole 1312 with S pole 1311, when voltage when between G pole 1312 and S pole 1311 is fixed, the electric current flowed out from the D pole of enhancement mode PMOS 131 is constant when the voltage between S pole 1311 and D pole 1313 is larger substantially, when voltage between S pole 1311 and D pole 1313 is less, the electric current flowed out from the D pole of enhancement mode PMOS 131 reduces with the reduction of the voltage between S pole 1311 and D pole 1313, form I-V characteristic curve thus, substantially identical with the charging curve of battery core, can be well battery core charging.
In the utility model, charge-discharge circuit also comprises detection module 15, and detection module 15 is connected with battery core 14, for detecting voltage or the electric current of battery core 14, sends corresponding control signal according to battery core state.When charging overvoltage or overcurrent, make the G very low level overcharging control NMOS, otherwise be high level; When discharge overvoltage or overcurrent time, made to put and the G very low level of short-circuit protection control NMOS, otherwise be high level.
In the utility model, charge-discharge circuit also comprises overdischarge and short circuit protection module 16, and overdischarge and short circuit protection module 16 are connected with detection module 15.Overdischarge and short circuit protection module inside arrange the power NMOS tube 19 of body diode; control its switching by the G electrode potential of NMOS tube 19, when described NMOS tube 19 G very high level time, NMOS tube 19 conducting; when NMOS tube 19 G very low level time, NMOS tube 19 is ended.
In the utility model, charge-discharge circuit also comprises additives for overcharge protection module 17, and additives for overcharge protection module 17 is connected with detection module 15.The power NMOS tube 19 of additives for overcharge protection inside modules band body diode, controls its switching by the G electrode potential of NMOS tube 19, when NMOS tube 19 G very high level time, NMOS tube 19 conducting, when NMOS tube 19 G very low level time, NMOS tube 19 is ended.
As described in Figure 1, a kind of charge-discharge circuit yet can comprise earth terminal 18, and earth terminal 18 is connected with overdischarge and short circuit protection module 16 and additives for overcharge protection module 17 respectively, and earth terminal 18 disturbs for preventing electromagnetic coupled.
For solving the problem, the utility model also provides chargeable IC-card, and chargeable IC-card comprises the charge-discharge circuit in above-mentioned utility model content.
The technical problem that the utility model mainly solves is to provide a kind of charge-discharge circuit and chargeable IC-card, adopt enhancement mode PMOS, there is no the trickle charge stage, battery core is charged to rated maximum voltage and namely ends charging, which simplify circuit, reduce the cost of IC-card, adopt diode, prevent the electricity of putting upside down of battery core.The control signal action that overdischarge and short circuit protection module, additives for overcharge protection module send according to battery core state according to detection module, when charging overvoltage or charge over-current, additives for overcharge protection module disconnects, and now charging current cannot get back to input power ground, and battery core is not charged; When battery core electric discharge overvoltage or discharge over-current, overdischarge and short circuit protection module disconnect, and battery core cannot supplying power for outside, has good charge protection and discharge prevention function.
It should be noted that, preferably execution mode of the present utility model is given in specification of the present utility model and accompanying drawing thereof, but, the utility model can be realized by many different forms, be not limited to the execution mode described by this specification, these execution modes not as the extra restriction to the utility model content, provide the object of these execution modes be make the understanding of disclosure of the present utility model more comprehensively thorough.Further, above-mentioned each technical characteristic continues combination mutually, is formed not at above-named various execution mode, is all considered as the scope that the utility model specification is recorded; Further, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to the utility model claims.
Claims (10)
1. a charge-discharge circuit, is characterized in that, comprising: DC power supply, switching regulator, current regulating module and battery core;
The input of described switching regulator is connected with described DC power supply;
Described current regulating module arranges enhancement mode PMOS, and the input of described current regulating module is connected with the output of described switching regulator;
The input of described battery core is connected with the output of described current regulating module.
2. charge-discharge circuit according to claim 1, is characterized in that, described enhancement mode PMOS is provided with S pole, G pole and D pole.
3. charge-discharge circuit according to claim 2, is characterized in that, described current regulating module also comprises diode, and the input of described diode is connected with described switching regulator, and the output of described diode is connected with the S pole of described PMOS.
4. charge-discharge circuit according to claim 3, is characterized in that, described current regulating module also comprises resistance, and the two ends of described resistance are connected with the S pole of described PMOS and the G pole of PMOS respectively.
5. charge-discharge circuit according to claim 4, is characterized in that, the output of the very described enhancement mode PMOS of described D, the D pole of described PMOS is connected with the input of described battery core.
6. charge-discharge circuit according to claim 5, is characterized in that, described charge-discharge circuit also comprises detection module, and described detection module is connected with described battery core, for detecting voltage or the electric current of described battery core.
7. charge-discharge circuit according to claim 6, is characterized in that, described charge-discharge circuit also comprises overdischarge and short circuit protection module, and described overdischarge and short circuit protection module are connected with described detection module.
8. charge-discharge circuit according to claim 7, is characterized in that, described charge-discharge circuit also comprises additives for overcharge protection module, and described additives for overcharge protection module is connected with described detection module.
9. charge-discharge circuit according to claim 8, is characterized in that, described overdischarge and short circuit protection module and additives for overcharge protection module are respectively arranged with NMOS tube.
10. a chargeable IC-card, is characterized in that, comprises the charge-discharge circuit described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521010408.3U CN205160169U (en) | 2015-12-08 | 2015-12-08 | Charging and discharging circuit and chargeable IC -card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521010408.3U CN205160169U (en) | 2015-12-08 | 2015-12-08 | Charging and discharging circuit and chargeable IC -card |
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| Publication Number | Publication Date |
|---|---|
| CN205160169U true CN205160169U (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521010408.3U Active CN205160169U (en) | 2015-12-08 | 2015-12-08 | Charging and discharging circuit and chargeable IC -card |
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| Country | Link |
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| CN (1) | CN205160169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355854A (en) * | 2020-03-16 | 2020-06-30 | 青岛中加特电气股份有限公司 | Voice transmission device, system and use method thereof |
-
2015
- 2015-12-08 CN CN201521010408.3U patent/CN205160169U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355854A (en) * | 2020-03-16 | 2020-06-30 | 青岛中加特电气股份有限公司 | Voice transmission device, system and use method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518055 1407 floor, 14 floor, Fuguang business building, 1 Nanshan District Road, Taoyuan, Shenzhen, Guangdong Patentee after: Shenzhen Bureau of Polytron Technologies Inc Address before: 301, building six, building B, No.1 building, No.1 Industrial Road, Nanshan District, Guangdong, Shenzhen, 518067 Patentee before: Shenzhen Zhongke Xunlian Technology Co., Ltd |
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| CP03 | Change of name, title or address |