CN104079046A - Charging circuit of battery - Google Patents
Charging circuit of battery Download PDFInfo
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- CN104079046A CN104079046A CN201310100784.0A CN201310100784A CN104079046A CN 104079046 A CN104079046 A CN 104079046A CN 201310100784 A CN201310100784 A CN 201310100784A CN 104079046 A CN104079046 A CN 104079046A
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- switching tube
- operational amplifier
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a charging circuit of a battery. In a charging process of the battery, an operational amplifier U1 outputs different levels to a switching tube Q1 by comparing a voltage value provided by a voltage stabilizing circuit D1 with voltage of the battery, and on-off of a relay switch is controlled by switch-on or switch-off of the switching tube Q1. Therefore, automatic charging of the battery and charging stop in case of overcharging are achieved, the damage of the battery is reduced, and the service life of the battery is prolonged.
Description
Technical field
The present invention relates to electronic applications, relate in particular to a kind of battery charger.
Background technology
In prior art, some charging circuit to battery (such as, lithium ion battery) carry out can not realizing automatic charging in charging process, and in charging process, can not well control it and overcharge, and cause battery infringement, reduce its useful life.
Summary of the invention
Technical problem to be solved by this invention is, a kind of battery charger is provided, and can realize the automatic charging of battery and when overcharging, stop charging, to reduce the infringement of battery, extends the life of a cell.
In order to solve the problems of the technologies described above, the battery charger that embodiments of the invention provide, is characterized in that, comprising: voltage conversion circuit P1, operational amplifier U1, charging resistor R3, switching tube Q1, relay K 1 and voltage stabilizing circuit D1, wherein:
The input of described voltage conversion circuit P1 is connected with external power source, the low-voltage needing for the high voltage of described external power source being converted to described battery;
The in-phase input end of described operational amplifier U1 is connected with the first output of described voltage conversion circuit P1, and reverse input end is connected with the positive pole of described battery, and the output of described operational amplifier U1 is connected with the input of described switching tube Q1;
The first end of described charging resistor R3 is connected with the first output of described voltage conversion circuit P1, and the second end is connected with the switch spring of described relay K 1;
The first output of described switching tube Q1 is connected with the first end of the coil of described relay K 1, the second output head grounding of described switching tube Q1;
The second end of the coil of described relay K 1 is connected with the first output of described voltage conversion circuit P1, and the normally-closed contact of described relay K 1 is connected with the reverse input end of described operational amplifier U1;
The first end of described voltage stabilizing circuit D1 is connected with the in-phase input end of described operational amplifier U1, the second end ground connection of described voltage stabilizing circuit D1, the magnitude of voltage that described voltage stabilizing circuit D1 provides to the in-phase input end of described operational amplifier U1 is the magnitude of voltage that described battery presents while being full of electricity;
The second output of described voltage conversion circuit P1 and the minus earth of described battery.
In some feasible execution modes, between the in-phase input end of described operational amplifier U1 and the first output of described voltage conversion circuit P1, be connected with current-limiting resistance R1.
In some feasible execution modes, between the output of described operational amplifier U1 and the input of described switching tube Q1, be connected with current-limiting resistance R2.
In some feasible execution modes, between the first output of described switching tube Q1 and the first output of described voltage conversion circuit P1, be connected with current-limiting resistance R4 and LED light-emitting diode.
In some feasible execution modes, between the negative pole of described battery and the first output of described voltage conversion circuit P1, be connected with filter capacitor C1.
In some feasible execution modes, the described voltage conversion circuit P1 that states comprises transformer T1 and full-bridge rectifier T2, the input of described transformer T1 is connected with external power source, the output of described transformer T1 is connected with the input of described full-bridge rectifier T2, the first output of described full-bridge rectifier T2 respectively with the in-phase input end of described operational amplifier U1, the second end of the coil of the first end of described charging resistor R3 and described relay K 1 be connected.
In some feasible execution modes, described voltage stabilizing circuit D1 comprises and is connected on the in-phase input end of described operational amplifier U1 and the diode D2 between ground and voltage-stabiliser tube D3, and the conduction voltage drop that the puncture voltage of described voltage-stabiliser tube D3 adds the above diode D2 equals battery and is full of electric maximum voltage value.
In some feasible execution modes, described battery is 18650 lithium ion batteries.
In some feasible execution modes, described switching tube Q1 is triode, the base stage of described triode is the input of described switching tube Q1, the first output of the very described switching tube Q1 of the current collection of described triode, the second output of the very described switching tube Q1 of the transmitting of described triode.。
Embodiment of the present invention tool has the following advantages or beneficial effect:
The battery charger of the embodiment of the present invention, in to the process of battery charging, the magnitude of voltage providing by comparison voltage stabilizing circuit D1 and the voltage of battery, so that operational amplifier U1 exports different level to switching tube Q1, and carry out the closed of control relay switch or disconnect (concrete by conducting or the cut-off of switching tube Q1, when the voltage of battery is less than the magnitude of voltage that voltage stabilizing circuit D1 provides, the exportable high level of operational amplifier U1 is to switching tube Q1, switching tube Q1 conducting, and then the switch spring of relay K 1 is allocated to normally-closed contact, resistance R 3 conductings are also charged to battery, and when cell voltage is greater than the magnitude of voltage that voltage stabilizing circuit D1 provides, operational amplifier U1 output low level is to switching tube Q1, switching tube Q1 cut-off, and then the switch spring of relay K 1 is allocated to normally opened contact, resistance R 3 can not conducting be battery charging, and then play the effect that stops charging while overcharging), thus, realization is to the automatic charging of battery and when overcharging, stop charging, to reduce the infringement of battery, extend the life of a cell.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that the modular structure of an embodiment of battery charger of the present invention forms schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
With reference to figure 1, battery charger of the present invention can comprise voltage conversion circuit P1, operational amplifier U1, charging resistor R3, switching tube Q1, relay K 1 and voltage stabilizing circuit D1, wherein: the input of described voltage conversion circuit P1 is connected with external power source, for the high voltage of described external power source being converted to the low-voltage (specific implementation that described battery BT needs, the difference of the battery charging as required to voltage requirements, the difference of external power source, the ratio of voltage conversion circuit P1 conversion is also different.Such as, as shown in Figure 1, suppose, needing the battery of charging is 18650 lithium ion batteries, outer power voltage is 220 volts of alternating currents, voltage conversion circuit P1 need be converted to the alternating current of 220 volts 18 volts of direct currents); The in-phase input end of described operational amplifier U1 is connected with the first output of described voltage conversion circuit P1, and reverse input end is connected with the positive pole of described battery, and the output of described operational amplifier U1 is connected with the input of described switching tube Q1; The first end of described charging resistor R3 is connected with the first output of described voltage conversion circuit P1, and the second end is connected with the switch spring of described relay K 1; The first output of described switching tube Q1 is connected with the first end of the coil of described relay K 1, the second output head grounding of described switching tube Q1; The second end of the coil of described relay K 1 is connected with the first output of described voltage conversion circuit P1, and the normally-closed contact of described relay K 1 is connected with the reverse input end of described operational amplifier U1; The first end of described voltage stabilizing circuit D1 is connected with the in-phase input end of described operational amplifier U1, the second end ground connection of described voltage stabilizing circuit D1, the magnitude of voltage that described voltage stabilizing circuit D1 provides to the in-phase input end of described operational amplifier U1 is the magnitude of voltage that described battery presents while being full of electricity; The second output of described voltage conversion circuit P1 and the minus earth of described battery.
Still, with reference to figure 1, in some feasible execution modes, between the in-phase input end of described operational amplifier U1 and the first output of described voltage conversion circuit P1, be connected with current-limiting resistance R1.
Still, with reference to figure 1, in some feasible execution modes, between the output of described operational amplifier U1 and the input of described switching tube Q1, be connected with current-limiting resistance R2.
Still with reference to figure 1, in some feasible execution modes, between the first output of described switching tube Q1 and the first output of described voltage conversion circuit P1, be connected with current-limiting resistance R4 and LED light-emitting diode, described LED light-emitting diode, for when battery being charged by charging resistor R3, charges to battery by flicker reminding user.
Still, with reference to figure 1, in some feasible execution modes, between the negative pole of described battery and the first output of described voltage conversion circuit P1, be connected with filter capacitor C1.
Still with reference to figure 1, in some feasible execution modes, the described voltage conversion circuit P1 that states can comprise transformer T1 and full-bridge rectifier T2, the input of described transformer T1 (being the input of P1) is connected with external power source, the output of described transformer T1 is connected with the input of described full-bridge rectifier T2, the first output of described full-bridge rectifier T2 (being the first output of P1) respectively with the in-phase input end of described operational amplifier U1, the second end of the coil of the first end of described charging resistor R3 and described relay K 1 be connected.
Still with reference to figure 1, in some feasible execution modes, described voltage stabilizing circuit D1 can comprise and be connected on the in-phase input end of described operational amplifier U1 and the diode D2 between ground and voltage-stabiliser tube D3, and the conduction voltage drop that the puncture voltage of described voltage-stabiliser tube D3 adds the above diode D2 equals battery and is full of electric maximum voltage value.
Still with reference to figure 1, in some feasible execution modes, described switching tube Q1 is triode, the base stage of described triode is the input of described switching tube Q1, the first output of the very described switching tube Q1 of the current collection of described triode, the second output of the very described switching tube Q1 of the transmitting of described triode.
The battery of the needs of take below chargings describes the principle of inventive embodiments as lithium ion battery (be battery BT be lithium ion battery) in Fig. 1 as example.In specific implementation, suppose that the lithium ion battery in Fig. 1 is 4 batteries series connection, when being full of electricity, every batteries is 4.2 volts, when 4 batteries are full of electricity, voltage is about 16.8 volts, therefore, voltage stabilizing circuit D1 can provide to the in-phase input end of operational amplifier U1 the magnitude of voltage that is about 16.8 volts, such as, at voltage stabilizing circuit D1, comprise under the situation of diode D2 and voltage-stabiliser tube D3, can select puncture voltage is the voltage-stabiliser tube of 16 volts, the puncture voltage 16 of voltage-stabiliser tube D3 adds that the conduction voltage drop of diode D2 equals 16.7 like this, thus, when system is normally worked, when battery BT voltage is during lower than 16.7V, operational amplifier U1 exports high level, switching tube Q1 conducting, relay K 1 is charged, switch spring adhesive is to normally-closed contact, at this moment the electric current providing by resistance R 3 charges the battery, now luminous to carry out reminding user be battery BT charging to LED1, when cell voltage is greater than 16.7 volts, operational amplifier U1 output low level, switching tube Q1 cut-off, relay K 1 is not worked, switch spring adhesive is to normally opened contact, now not conducting of charging resistor R3, can not charge for battery, can prevent over-charging of battery like this, with this, increase battery.
Above-described execution mode, does not form the restriction to this technical scheme protection range.The modification of doing within any spirit at above-mentioned execution mode and principle, be equal to and replace and improvement etc., within all should being included in the protection range of this technical scheme.
Claims (9)
1. a battery charger, is characterized in that, comprising: voltage conversion circuit P1, operational amplifier U1, charging resistor R3, switching tube Q1, relay K 1 and voltage stabilizing circuit D1, wherein:
The input of described voltage conversion circuit P1 is connected with external power source, the low-voltage needing for the high voltage of described external power source being converted to described battery;
The in-phase input end of described operational amplifier U1 is connected with the first output of described voltage conversion circuit P1, and reverse input end is connected with the positive pole of described battery, and the output of described operational amplifier U1 is connected with the input of described switching tube Q1;
The first end of described charging resistor R3 is connected with the first output of described voltage conversion circuit P1, and the second end is connected with the switch spring of described relay K 1;
The first output of described switching tube Q1 is connected with the first end of the coil of described relay K 1, the second output head grounding of described switching tube Q1;
The second end of the coil of described relay K 1 is connected with the first output of described voltage conversion circuit P1, and the normally-closed contact of described relay K 1 is connected with the reverse input end of described operational amplifier U1;
The first end of described voltage stabilizing circuit D1 is connected with the in-phase input end of described operational amplifier U1, the second end ground connection of described voltage stabilizing circuit D1, the magnitude of voltage that described voltage stabilizing circuit D1 provides to the in-phase input end of described operational amplifier U1 is the magnitude of voltage that described battery presents while being full of electricity;
The second output of described voltage conversion circuit P1 and the minus earth of described battery.
2. battery charger as claimed in claim 1, is characterized in that, between the in-phase input end of described operational amplifier U1 and the first output of described voltage conversion circuit P1, is connected with current-limiting resistance R1.
3. battery charger as claimed in claim 1, is characterized in that, between the output of described operational amplifier U1 and the input of described switching tube Q1, is connected with current-limiting resistance R2.
4. battery charger as claimed in claim 1, is characterized in that, between the first output of described switching tube Q1 and the first output of described voltage conversion circuit P1, is connected with current-limiting resistance R4 and LED light-emitting diode.
5. battery charger as claimed in claim 1, is characterized in that, between the negative pole of described battery and the first output of described voltage conversion circuit P1, is connected with filter capacitor C1.
6. the battery charger as described in any one in claim 1-5, it is characterized in that, the described voltage conversion circuit P1 that states comprises transformer T1 and full-bridge rectifier T2, the input of described transformer T1 is connected with external power source, the output of described transformer T1 is connected with the input of described full-bridge rectifier T2, the first output of described full-bridge rectifier T2 respectively with the in-phase input end of described operational amplifier U1, the second end of the coil of the first end of described charging resistor R3 and described relay K 1 be connected.
7. the battery charger as described in any one in claim 1-5, it is characterized in that, described voltage stabilizing circuit D1 comprises and is connected on the in-phase input end of described operational amplifier U1 and the diode D2 between ground and voltage-stabiliser tube D3, and the conduction voltage drop that the puncture voltage of described voltage-stabiliser tube D3 adds the above diode D2 equals battery and is full of electric maximum voltage value.
8. the battery charger as described in any one in claim 1-5, is characterized in that, described battery is 18650 lithium ion batteries.
9. the battery charger as described in any one in claim 1-5, it is characterized in that, described switching tube Q1 is triode, the base stage of described triode is the input of described switching tube Q1, the first output of the very described switching tube Q1 of the current collection of described triode, the second output of the very described switching tube Q1 of the transmitting of described triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310100784.0A CN104079046B (en) | 2013-03-26 | 2013-03-26 | A kind of battery charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310100784.0A CN104079046B (en) | 2013-03-26 | 2013-03-26 | A kind of battery charger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104079046A true CN104079046A (en) | 2014-10-01 |
| CN104079046B CN104079046B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310100784.0A Expired - Fee Related CN104079046B (en) | 2013-03-26 | 2013-03-26 | A kind of battery charger |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2859831Y (en) * | 2006-01-16 | 2007-01-17 | 房庆东 | Pole plates cleaning device for lead-acid storage battery |
| EP1950862A2 (en) * | 2007-01-29 | 2008-07-30 | Hitachi Koki Co., Ltd. | Charging device |
| CN201985591U (en) * | 2011-05-03 | 2011-09-21 | 刘海龙 | Solar energy three-segment smart charger |
| CN202524151U (en) * | 2012-02-29 | 2012-11-07 | 河北元道通信技术有限公司 | Supplementary power supply of remote base station power supply system |
| CN102810899A (en) * | 2011-05-30 | 2012-12-05 | 海洋王照明科技股份有限公司 | Charging circuit with short circuit protecting function and charger |
| CN102810897A (en) * | 2011-05-30 | 2012-12-05 | 海洋王照明科技股份有限公司 | Charging circuit with short-circuit protection and charger |
-
2013
- 2013-03-26 CN CN201310100784.0A patent/CN104079046B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2859831Y (en) * | 2006-01-16 | 2007-01-17 | 房庆东 | Pole plates cleaning device for lead-acid storage battery |
| EP1950862A2 (en) * | 2007-01-29 | 2008-07-30 | Hitachi Koki Co., Ltd. | Charging device |
| CN201985591U (en) * | 2011-05-03 | 2011-09-21 | 刘海龙 | Solar energy three-segment smart charger |
| CN102810899A (en) * | 2011-05-30 | 2012-12-05 | 海洋王照明科技股份有限公司 | Charging circuit with short circuit protecting function and charger |
| CN102810897A (en) * | 2011-05-30 | 2012-12-05 | 海洋王照明科技股份有限公司 | Charging circuit with short-circuit protection and charger |
| CN202524151U (en) * | 2012-02-29 | 2012-11-07 | 河北元道通信技术有限公司 | Supplementary power supply of remote base station power supply system |
Non-Patent Citations (1)
| Title |
|---|
| 李子莹等: "太阳能路灯自动跟踪***的研制", 《光源与照明》, no. 3, 30 September 2008 (2008-09-30) * |
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| CN104079046B (en) | 2016-05-11 |
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Granted publication date: 20160511 Termination date: 20190326 |
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