CN104518527A - Battery charging circuit and battery charger - Google Patents
Battery charging circuit and battery charger Download PDFInfo
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- CN104518527A CN104518527A CN201310443436.3A CN201310443436A CN104518527A CN 104518527 A CN104518527 A CN 104518527A CN 201310443436 A CN201310443436 A CN 201310443436A CN 104518527 A CN104518527 A CN 104518527A
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- charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiments of the invention disclose a battery charging circuit and a battery charger. The battery charging circuit comprises a charging circuit, a protective circuit, a relay K1 and a contact of the relay K1, wherein the charging circuit is connected with the contact of the relay K1, the relay K1 is connected with the protective circuit, the charging circuit is used for charging a battery, and the protective circuit is used for controlling the contact of the relay K1 to act so as to enable the charging circuit to be opened. By using the battery charging circuit and the battery charger, no requirements are applied to polarity connection of the battery, the battery is charged, and overvoltage protection is carried out.
Description
Technical field
The present invention relates to electronic circuit technology field, particularly relate to a kind of battery charger and battery charger.
Background technology
Charger typically refers to and alternating current is converted to galvanic equipment, and this equipment is widely used in every field, and such as in field of household appliances or take storage battery as the electricity consumption occasion of working power, charger is with a wide range of applications.But existing charger, when charging, need illustrate the both positive and negative polarity of exact connect ion battery, otherwise will produce accident, and when cell voltage is too high, can not protect the safety of charger and rechargeable battery timely according to the charging of battery.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of battery charger and battery charger, to battery charging, and carries out overvoltage protection.
In order to solve the problems of the technologies described above, embodiments provide a kind of battery charger, comprise: the contact of charging circuit, protective circuit, relay K 1 and relay K 1, described charging circuit is connected with the contact of described relay K 1, and described relay K 1 is connected with described protective circuit;
Wherein, described charging circuit is used for for battery charging, and described protective circuit makes charging circuit open a way for the contact action controlling described relay K 1.
Wherein, described charging circuit comprises resistance R1, resistance R2, resistance R3, resistance R4, triode Q1, triode Q2, triode Q3, triode Q4 and power supply VCC;
One end of described resistance R1 is connected with the base stage of described triode Q3, the emitter of described triode Q3 is connected with the emitter of described triode Q4 and the contact of described relay K 1 respectively, the collector electrode of described triode Q3 is connected with one end of described resistance R3, the other end of described resistance R3 is connected with the base stage of described triode Q4, the collector electrode of described triode Q3 is connected with one end of described resistance R4, the other end of described resistance R4 is connected with the base stage of described triode Q1, the collector electrode of described triode Q4 is connected with the collector electrode of described triode Q1, the grounded emitter of described triode Q1, the collector electrode of described triode Q2 is connected with the collector electrode of described triode Q3, the grounded emitter of described triode Q2, and the base stage of described triode Q2 is connected with one end of described resistance R2, and the other end of described resistance R2 is connected with the other end of described resistance R1,
Wherein, charging contact element B+ is drawn from the collector electrode of described triode Q3, for the connection of the one end with battery, draw charging contact element B-, for being connected with the other end of battery from the collector electrode of described triode Q4 and the other end of described resistance R1 and described resistance R2.
Wherein, described protective circuit comprises operational amplifier U1A, operational amplifier U1B, voltage-stabiliser tube U2, voltage-stabiliser tube U3, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, power supply VS and power supply VE;
The in-phase input end of described operational amplifier U1A is connected with one end of described resistance R6 and described resistance R7 respectively, the other end ground connection of described resistance R6; The inverting input of described operational amplifier U1A is connected with the reference edge of described voltage-stabiliser tube U2, the plus earth of described voltage-stabiliser tube U2, and the negative electrode of described voltage-stabiliser tube U2 is connected with described power supply VS; The positive power source terminal of described operational amplifier U1A is connected with described power supply VE, the negative power end ground connection of described operational amplifier U1A; After the output of described operational amplifier U1A is connected with the output of described operational amplifier U1B, be all connected with one end of described resistance R5, the other end of described resistance R5 is connected with described relay K 1, the other end ground connection of described relay K 1; The in-phase input end of described operational amplifier U1B is connected with one end of described resistance R8 and described resistance R9 respectively, the other end ground connection of described resistance R9; The inverting input of described operational amplifier U1B is connected with the reference edge of described voltage-stabiliser tube U3, the plus earth of described voltage-stabiliser tube U3, and the negative electrode of described voltage-stabiliser tube U3 is connected with described power supply VE; The other end of described resistance R7 connects described charging contact element B+, and the other end of described resistance R8 connects described charging contact element B-.
Wherein, described relay K 1 is electromagnetic relay.
Wherein, described resistance R1, resistance R2, resistance R3, resistance R4 and resistance R5 are current-limiting resistance.
Wherein, described resistance R6, resistance R7, resistance R8 and resistance R9 are divider resistance.
Wherein, the model of described operational amplifier U1A and described operational amplifier U1B is LM324.
Wherein, the model of described voltage-stabiliser tube U2 and described voltage-stabiliser tube U3 is TL431.
Correspondingly, the embodiment of the present invention additionally provides a kind of battery charger, comprising: charging cavity and battery charger, and described charging cavity is used for placing battery, and the two ends of described charging cavity are connected with described battery charger respectively;
Wherein, described battery charger comprises: the contact of charging circuit, protective circuit, relay K 1 and relay K 1, and described charging circuit is connected with the contact of described relay K 1, and described relay K 1 is connected with described protective circuit; Described charging circuit is used for for battery charging, and described protective circuit makes charging circuit open a way for the contact action controlling described relay K 1, protection battery.
Wherein, described charging circuit comprises resistance R1, resistance R2, resistance R3, resistance R4, triode Q1 and Q2, triode Q3 and Q4 and power supply VCC, one end of described resistance R1 is connected with the base stage of described triode Q3, the emitter of described triode Q3 is connected with the emitter of described triode Q4 and the contact of described relay K 1 respectively, the collector electrode of described triode Q3 is connected with one end of described resistance R3, the other end of described resistance R3 is connected with the base stage of described triode Q4, the collector electrode of described triode Q3 is also connected with one end of described resistance R4, the other end of described resistance R4 is connected with the base stage of described triode Q1, the collector electrode of described triode Q4 is connected with the collector electrode of described triode Q1, the grounded emitter of described triode Q1, the collector electrode of described triode Q2 is connected with the collector electrode of described triode Q3, the grounded emitter of described triode Q2, and the base stage of described triode Q2 is connected with one end of described resistance R2, and the other end of described resistance R2 is connected with the other end of described resistance R1, wherein, charging contact element B+ is drawn from the collector electrode of described triode Q3, for being connected with one end of described charging cavity, from the collector electrode of described triode Q4 and the collector electrode of described triode Q1, and the other end of described resistance R1 and described resistance R2 draws charging contact element B-, for being connected with the other end of described charging cavity,
Described protective circuit comprises operational amplifier U1A, operational amplifier U1B, voltage-stabiliser tube U2, voltage-stabiliser tube U3, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, power supply VS and power supply VE; The in-phase input end of described operational amplifier U1A is connected with one end of described resistance R6 and described resistance R7 respectively, the other end ground connection of described resistance R6; The inverting input of described operational amplifier U1A is connected with the reference edge of described voltage-stabiliser tube U2, the plus earth of described voltage-stabiliser tube U2, and the negative electrode of described voltage-stabiliser tube U2 is connected with described power supply VS; The positive power source terminal of described operational amplifier U1A is connected with described power supply VE, the negative power end ground connection of described operational amplifier U1A; After the output of described operational amplifier U1A is connected with the output of described operational amplifier U1B, be connected with one end of described resistance R5, the other end of described resistance R5 is connected with described relay K 1, the other end ground connection of described relay K 1; The in-phase input end of described operational amplifier U1B is connected with one end of described resistance R8 and described resistance R9 respectively, the other end ground connection of described resistance R9; The inverting input of described operational amplifier U1B is connected with the reference edge of described voltage-stabiliser tube U3, the plus earth of described voltage-stabiliser tube U3, and the negative electrode of described voltage-stabiliser tube U3 is connected with described power supply VE; The other end of described resistance R7 connects described charging contact element B+, and the other end of described resistance R8 connects described charging contact element B-.
Implement the embodiment of the present invention, there is following beneficial effect:
The embodiment of the present invention proposes a kind of battery charger, controls charging circuit by the work of protective circuit control relay contact, thus can when charging; when battery overvoltage; make open circuit to protect battery, reach charging safety, circuit is easy to the effect realized.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of battery charger structural representation of the embodiment of the present invention;
Fig. 2 is a kind of battery charger figure of the embodiment of the present invention;
Fig. 3 is a kind of battery charger structure schematic diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one:
Refer to Fig. 1, be a kind of battery charger structural representation of the embodiment of the present invention, this battery charger comprises:
The contact of charging circuit 1, protective circuit 2, relay K 1 and relay K 1, described charging circuit 1 is connected with the contact of described relay K 1, and described relay K 1 is connected with described protective circuit 2;
Wherein, described charging circuit 1 is for being battery charging, and described protective circuit 2 makes charging circuit 1 open a way for the contact action controlling described relay K 1, protection battery.
The charging contact element B+ that charging circuit 1 in the present embodiment is drawn and charging contact element B-, does not do requirement to rechargeable battery polarity; When the cell voltage between contact element B+ and charging contact element B-that charges is too high, described protective circuit 2 exports high level and relay K 1 is worked, and makes the contact adhesive of relay K 1, i.e. charging circuit open circuit, protection battery.
Implement the beneficial effect of this inventive embodiments:
The embodiment of the present invention proposes a kind of structure of battery charger; control charging circuit by the work of protective circuit control relay contact, thus can, when rechargeable battery overvoltage, make open circuit to protect battery; reach charging safety, circuit is easy to the object realized.
Embodiment two:
Refer to Fig. 2, be a kind of battery charger figure of the embodiment of the present invention, comprise the contact of the charging circuit 1 in above-described embodiment, protective circuit 2, relay K 1 and relay K 1, concrete further, the embodiment of the present invention comprises:
Described charging circuit 1 comprises resistance R1, resistance R2, resistance R3, resistance R4, triode Q1, triode Q2, triode Q3, triode Q4 and power supply VCC;
One end of described resistance R1 is connected with the base stage of described triode Q3, the emitter of described triode Q3 is connected with the emitter of described triode Q4 and the contact of described relay K 1 respectively, the collector electrode of described triode Q3 is connected with one end of described resistance R3, the other end of described resistance R3 is connected with the base stage of described triode Q4, the collector electrode of described triode Q3 is connected with one end of described resistance R4, the other end of described resistance R4 is connected with the base stage of described triode Q1, the collector electrode of described triode Q4 is connected with the collector electrode of described triode Q1, the grounded emitter of described triode Q1, the collector electrode of described triode Q2 is connected with the collector electrode of described triode Q3, the grounded emitter of described triode Q2, and the base stage of described triode Q2 is connected with one end of described resistance R2, and the other end of described resistance R2 is connected with the other end of described resistance R1,
Wherein, charging contact element B+ is drawn from the collector electrode of described triode Q3, for the connection of the one end with battery, draw charging contact element B-, for being connected with the other end of battery from the collector electrode of described triode Q4 and the other end of described resistance R1 and described resistance R2.
Wherein, described triode Q1 and described triode Q2 is NPN type switching tube, and described triode Q3 and described triode Q4 is positive-negative-positive switching tube, all plays driving effect.
Wherein, described protective circuit comprises operational amplifier U1A, operational amplifier U1B, voltage-stabiliser tube U2, voltage-stabiliser tube U3, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, power supply VS and power supply VE;
The in-phase input end of described operational amplifier U1A is connected with one end of described resistance R6 and described resistance R7 respectively, the other end ground connection of described resistance R6; The inverting input of described operational amplifier U1A is connected with the reference edge of described voltage-stabiliser tube U2, the plus earth of described voltage-stabiliser tube U2, and the negative electrode of described voltage-stabiliser tube U2 is connected with described power supply VS; The positive power source terminal of described operational amplifier U1A is connected with described power supply VE, the negative power end ground connection of described operational amplifier U1A; After the output of described operational amplifier U1A is connected with the output of described operational amplifier U1B, be all connected with one end of described resistance R5, the other end of described resistance R5 is connected with described relay K 1, the other end ground connection of described relay K 1; The in-phase input end of described operational amplifier U1B is connected with one end of described resistance R8 and described resistance R9 respectively, the other end ground connection of described resistance R9; The inverting input of described operational amplifier U1B is connected with the reference edge of described voltage-stabiliser tube U3, the plus earth of described voltage-stabiliser tube U3, and the negative electrode of described voltage-stabiliser tube U3 is connected with described power supply VE; The other end of described resistance R7 connects described charging contact element B+, and the other end of described resistance R8 connects described charging contact element B-.
Wherein, described relay K 1 is electromagnetic relay, described resistance R1, resistance R2, resistance R3, resistance R4 and resistance R5 are current-limiting resistance, described resistance R6, resistance R7, resistance R8 and resistance R9 are divider resistance, the model of described operational amplifier U1A and described operational amplifier U1B is LM324, the model of described voltage-stabiliser tube U2 and described voltage-stabiliser tube U3 is TL431, provides 2.5V reference voltage, and operational amplifier U1 and U2, U3 form comparator respectively.
The specific works principle of the battery charger of the embodiment of the present invention is:
(1) the contact element B+ that charges connects the positive pole of battery, and charging contact element B-connects the negative pole of battery, described NPN type switching tube Q1 and described positive-negative-positive switching tube Q3 conducting, and form loop with the contact of power supply VCC, relay K 1 and ground, is that battery charges;
(2) the contact element B+ that charges connects the negative pole of battery, and charging contact element B-connects the positive pole of battery, described NPN type switching tube Q2 and described positive-negative-positive switching tube Q4 conducting, and forms loop with the contact of power supply VCC, relay K 1 with ground, is battery charging;
(3) during overtension between described charging contact element B+ and described charging contact element B-; described operational amplifier U1A or described operational amplifier U1B exports high level; then described relay K 1 works; make the contact of described relay K 1 to left side adhesive; described charging circuit open circuit, protection battery.
Implement the beneficial effect of the embodiment of the present invention:
A kind of battery charger that the embodiment of the present invention proposes, by the mating reaction of four switching tubes, polarity connection when charging circuit is charged to battery does not do requirement; By the work of protective circuit control relay, ensure the safety of the battery when cell voltage is too high; And circuit is simple, be easy to realize.
Embodiment three:
Refer to Fig. 3, a kind of structural representation of battery charger disclosed in the embodiment of the present invention, described battery charger comprises: charging cavity 1 and battery charger 2, and described charging cavity 1 is for placing battery, and the two ends of described charging cavity 1 are connected with described battery charger 2 respectively;
Wherein, described battery charger 2 comprises: the contact of charging circuit, protective circuit, relay K 1 and relay K 1, and described charging circuit is connected with the contact of described relay K 1, and described relay K 1 is connected with described protective circuit; Described charging circuit is used for for battery charging, and described protective circuit makes charging circuit open a way for the contact action controlling described relay K 1, protection battery.
Wherein, described charging circuit comprises resistance R1, resistance R2, resistance R3, resistance R4, triode Q1 and Q2, triode Q3 and Q4 and power supply VCC, one end of described resistance R1 is connected with the base stage of described triode Q3, the emitter of described triode Q3 is connected with the emitter of described triode Q4 and the contact of described relay K 1 respectively, the collector electrode of described triode Q3 is connected with one end of described resistance R3, the other end of described resistance R3 is connected with the base stage of described triode Q4, the collector electrode of described triode Q3 is also connected with one end of described resistance R4, the other end of described resistance R4 is connected with the base stage of described triode Q1, the collector electrode of described triode Q4 is connected with the collector electrode of described triode Q1, the grounded emitter of described triode Q1, the collector electrode of described triode Q2 is connected with the collector electrode of described triode Q3, the grounded emitter of described triode Q2, and the base stage of described triode Q2 is connected with one end of described resistance R2, and the other end of described resistance R2 is connected with the other end of described resistance R1, wherein, charging contact element B+ is drawn from the collector electrode of described triode Q3, for being connected with one end of described charging cavity, from the collector electrode of described triode Q4 and the collector electrode of described triode Q1, and the other end of described resistance R1 and described resistance R2 draws charging contact element B-, for being connected with the other end of described charging cavity,
Described protective circuit comprises operational amplifier U1A, operational amplifier U1B, voltage-stabiliser tube U2, voltage-stabiliser tube U3, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, power supply VS and power supply VE; The in-phase input end of described operational amplifier U1A is connected with one end of described resistance R6 and described resistance R7 respectively, the other end ground connection of described resistance R6; The inverting input of described operational amplifier U1A is connected with the reference edge of described voltage-stabiliser tube U2, the plus earth of described voltage-stabiliser tube U2, and the negative electrode of described voltage-stabiliser tube U2 is connected with described power supply VS; The positive power source terminal of described operational amplifier U1A is connected with described power supply VE, the negative power end ground connection of described operational amplifier U1A; After the output of described operational amplifier U1A is connected with the output of described operational amplifier U1B, be connected with one end of described resistance R5, the other end of described resistance R5 is connected with described relay K 1, the other end ground connection of described relay K 1; The in-phase input end of described operational amplifier U1B is connected with one end of described resistance R8 and described resistance R9 respectively, the other end ground connection of described resistance R9; The inverting input of described operational amplifier U1B is connected with the reference edge of described voltage-stabiliser tube U3, the plus earth of described voltage-stabiliser tube U3, and the negative electrode of described voltage-stabiliser tube U3 is connected with described power supply VE; The other end of described resistance R7 connects described charging contact element B+, and the other end of described resistance R8 connects described charging contact element B-.
Wherein, described triode Q1 and described triode Q2 is NPN type switching tube, and described triode Q3 and described triode Q4 is positive-negative-positive switching tube, all plays driving effect.Wherein, described relay K 1 is electromagnetic relay, described resistance R1, resistance R2, resistance R3, resistance R4 and resistance R5 are current-limiting resistance, described resistance R6, resistance R7, resistance R8 and resistance R9 are divider resistance, the model of described operational amplifier U1A and described operational amplifier U1B is LM324, the model of described voltage-stabiliser tube U2 and described voltage-stabiliser tube U3 is TL431, provides 2.5V reference voltage, and operational amplifier U1 and U2, U3 form comparator respectively.
The specific works principle of the battery charger of the embodiment of the present invention is:
Battery to be charged is put into described charging cavity, requirement is not done to the connection of battery polar, the charging contact element B+ be connected with described charging cavity when the positive pole of battery connects, the charging contact element B-that the negative pole of battery is connected with described charging cavity connects, described triode Q1 and described triode Q3 conducting; Otherwise, described triode Q2 and described triode Q4 conducting, the connection of two kinds of battery polars all forms loop with the contact of power supply VCC, relay K 1 and ground, is that battery charges;
The cell voltage to be charged placed when described charging cavity is too high, and described operational amplifier U1A or described operational amplifier U1B exports high level, and relay K 1 is worked, and the contact of described relay K 1 is to left side adhesive, and described charging circuit is opened a way.
Implement the beneficial effect of the embodiment of the present invention:
A kind of battery charger that the embodiment of the present invention proposes, by the mating reaction of four switching tubes, polarity connection when charging circuit is charged to battery does not do requirement; By the work of protective circuit control relay, ensure the safety of the battery when cell voltage is too high; And circuit is simple, be easy to realize.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. a battery charger, is characterized in that, comprising:
The contact of charging circuit, protective circuit, relay K 1 and relay K 1, described charging circuit is connected with the contact of described relay K 1, and described relay K 1 is connected with described protective circuit;
Wherein, described charging circuit is used for for battery charging, and described protective circuit makes charging circuit open a way for the contact action controlling described relay K 1.
2. circuit as claimed in claim 1, it is characterized in that, described charging circuit comprises resistance R1, resistance R2, resistance R3, resistance R4, triode Q1, triode Q2, triode Q3, triode Q4 and power supply VCC;
One end of described resistance R1 is connected with the base stage of described triode Q3, the emitter of described triode Q3 is connected with the emitter of described triode Q4 and the contact of described relay K 1 respectively, the collector electrode of described triode Q3 is connected with one end of described resistance R3, the other end of described resistance R3 is connected with the base stage of described triode Q4, the collector electrode of described triode Q3 is connected with one end of described resistance R4, the other end of described resistance R4 is connected with the base stage of described triode Q1, the collector electrode of described triode Q4 is connected with the collector electrode of described triode Q1, the grounded emitter of described triode Q1, the collector electrode of described triode Q2 is connected with the collector electrode of described triode Q3, the grounded emitter of described triode Q2, and the base stage of described triode Q2 is connected with one end of described resistance R2, and the other end of described resistance R2 is connected with the other end of described resistance R1,
Wherein, charging contact element B+ is drawn from the collector electrode of described triode Q3, for the connection of the one end with battery, draw charging contact element B-, for being connected with the other end of battery from the collector electrode of described triode Q4 and the other end of described resistance R1 and described resistance R2.
3. circuit as claimed in claim 1, it is characterized in that, described protective circuit comprises operational amplifier U1A, operational amplifier U1B, voltage-stabiliser tube U2, voltage-stabiliser tube U3, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, power supply VS and power supply VE;
The in-phase input end of described operational amplifier U1A is connected with one end of described resistance R6 and described resistance R7 respectively, the other end ground connection of described resistance R6; The inverting input of described operational amplifier U1A is connected with the reference edge of described voltage-stabiliser tube U2, the plus earth of described voltage-stabiliser tube U2, and the negative electrode of described voltage-stabiliser tube U2 is connected with described power supply VS; The positive power source terminal of described operational amplifier U1A is connected with described power supply VE, the negative power end ground connection of described operational amplifier U1A; After the output of described operational amplifier U1A is connected with the output of described operational amplifier U1B, be all connected with one end of described resistance R5, the other end of described resistance R5 is connected with described relay K 1, the other end ground connection of described relay K 1; The in-phase input end of described operational amplifier U1B is connected with one end of described resistance R8 and described resistance R9 respectively, the other end ground connection of described resistance R9; The inverting input of described operational amplifier U1B is connected with the reference edge of described voltage-stabiliser tube U3, the plus earth of described voltage-stabiliser tube U3, and the negative electrode of described voltage-stabiliser tube U3 is connected with described power supply VE; The other end of described resistance R7 connects described charging contact element B+, and the other end of described resistance R8 connects described charging contact element B-.
4. circuit as claimed in claim 1, it is characterized in that, described relay K 1 is electromagnetic relay.
5. circuit as claimed in claim 2 or claim 3, it is characterized in that, described resistance R1, resistance R2, resistance R3, resistance R4 and resistance R5 are current-limiting resistance.
6. circuit as claimed in claim 3, it is characterized in that, described resistance R6, resistance R7, resistance R8 and resistance R9 are divider resistance.
7. circuit as claimed in claim 3, it is characterized in that, the model of described operational amplifier U1A and described operational amplifier U1B is LM324.
8. circuit as claimed in claim 3, it is characterized in that, the model of described voltage-stabiliser tube U2 and described voltage-stabiliser tube U3 is TL431.
9. a battery charger, is characterized in that, comprising: charging cavity and battery charger, and described charging cavity is used for placing battery, and the two ends of described charging cavity are connected with described battery charger respectively;
Wherein, described battery charger comprises: the contact of charging circuit, protective circuit, relay K 1 and relay K 1, and described charging circuit is connected with the contact of described relay K 1, and described relay K 1 is connected with described protective circuit; Described charging circuit is used for for battery charging, and described protective circuit makes charging circuit open a way for the contact action controlling described relay K 1, protection battery.
10. battery charger as claimed in claim 9, it is characterized in that, described charging circuit comprises resistance R1, resistance R2, resistance R3, resistance R4, triode Q1 and Q2, triode Q3 and Q4 and power supply VCC, one end of described resistance R1 is connected with the base stage of described triode Q3, the emitter of described triode Q3 is connected with the emitter of described triode Q4 and the contact of described relay K 1 respectively, the collector electrode of described triode Q3 is connected with one end of described resistance R3, the other end of described resistance R3 is connected with the base stage of described triode Q4, the collector electrode of described triode Q3 is also connected with one end of described resistance R4, the other end of described resistance R4 is connected with the base stage of described triode Q1, the collector electrode of described triode Q4 is connected with the collector electrode of described triode Q1, the grounded emitter of described triode Q1, the collector electrode of described triode Q2 is connected with the collector electrode of described triode Q3, the grounded emitter of described triode Q2, and the base stage of described triode Q2 is connected with one end of described resistance R2, and the other end of described resistance R2 is connected with the other end of described resistance R1, wherein, charging contact element B+ is drawn from the collector electrode of described triode Q3, for being connected with one end of described charging cavity, from the collector electrode of described triode Q4 and the collector electrode of described triode Q1, and the other end of described resistance R1 and described resistance R2 draws charging contact element B-, for being connected with the other end of described charging cavity,
Described protective circuit comprises operational amplifier U1A, operational amplifier U1B, voltage-stabiliser tube U2, voltage-stabiliser tube U3, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, power supply VS and power supply VE; The in-phase input end of described operational amplifier U1A is connected with one end of described resistance R6 and described resistance R7 respectively, the other end ground connection of described resistance R6; The inverting input of described operational amplifier U1A is connected with the reference edge of described voltage-stabiliser tube U2, the plus earth of described voltage-stabiliser tube U2, and the negative electrode of described voltage-stabiliser tube U2 is connected with described power supply VS; The positive power source terminal of described operational amplifier U1A is connected with described power supply VE, the negative power end ground connection of described operational amplifier U1A; After the output of described operational amplifier U1A is connected with the output of described operational amplifier U1B, be connected with one end of described resistance R5, the other end of described resistance R5 is connected with described relay K 1, the other end ground connection of described relay K 1; The in-phase input end of described operational amplifier U1B is connected with one end of described resistance R8 and described resistance R9 respectively, the other end ground connection of described resistance R9; The inverting input of described operational amplifier U1B is connected with the reference edge of described voltage-stabiliser tube U3, the plus earth of described voltage-stabiliser tube U3, and the negative electrode of described voltage-stabiliser tube U3 is connected with described power supply VE; The other end of described resistance R7 connects described charging contact element B+, and the other end of described resistance R8 connects described charging contact element B-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310443436.3A CN104518527A (en) | 2013-09-26 | 2013-09-26 | Battery charging circuit and battery charger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310443436.3A CN104518527A (en) | 2013-09-26 | 2013-09-26 | Battery charging circuit and battery charger |
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| CN104518527A true CN104518527A (en) | 2015-04-15 |
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| CN201310443436.3A Pending CN104518527A (en) | 2013-09-26 | 2013-09-26 | Battery charging circuit and battery charger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107719273A (en) * | 2017-09-15 | 2018-02-23 | 六安市同心畅能电子科技有限公司 | Charging battery of electric vehicle protection circuit |
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| CN101425697A (en) * | 2008-08-06 | 2009-05-06 | 深圳和而泰智能控制股份有限公司 | Charging circuit |
| CN101604282A (en) * | 2008-06-13 | 2009-12-16 | 鸿富锦精密工业（深圳）有限公司 | Voltage detection alarm device |
| US20120200968A1 (en) * | 2011-02-07 | 2012-08-09 | George Altemose | Battery Charge Protection System |
| CN202602326U (en) * | 2012-05-09 | 2012-12-12 | 杭州勇华车业有限公司 | Charger with over-voltage protection |
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| CN101604282A (en) * | 2008-06-13 | 2009-12-16 | 鸿富锦精密工业（深圳）有限公司 | Voltage detection alarm device |
| CN101425697A (en) * | 2008-08-06 | 2009-05-06 | 深圳和而泰智能控制股份有限公司 | Charging circuit |
| US20120200968A1 (en) * | 2011-02-07 | 2012-08-09 | George Altemose | Battery Charge Protection System |
| CN202602326U (en) * | 2012-05-09 | 2012-12-12 | 杭州勇华车业有限公司 | Charger with over-voltage protection |
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| CN107719273A (en) * | 2017-09-15 | 2018-02-23 | 六安市同心畅能电子科技有限公司 | Charging battery of electric vehicle protection circuit |
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Application publication date: 20150415 |