CN204761117U - Storage battery charging circuit - Google Patents

Abstract

The utility model discloses a storage battery charging circuit, including chip U1, resistance R1, electric capacity C1, emitting diode D1, relay J, key switch S1 and key switch S2, chip U1 pin 4 and chip U1 pin 8 VCC2 that all connects, the emitting diode D1 negative pole is connected to chip U1 pin 7, the anodal connecting resistance R1 of emitting diode D1, the resistance R1 other end VCC1 that connects respectively, resistance R5, resistance R6 and resistance R7, it is anodal that emitting diode D3 is connected to the resistance R7 other end, relay J contact J -1 pin an is connected to the emitting diode D3 negative pole, the relay J contact J -1 pin b connecting resistance R6 other end. Utility model storage battery charging circuit simple structure, observation storage battery E's that can be the very convenient electric quantity storage condition is crossed occasionally and is filled the restriction function being full of the electricity, and in addition at battery E both ends shunt capacitance C2, battery E's the safety of charging is guaranteed to the clutter of effectively worrying, and the security is high, still has compulsory charge -discharge function, and application scope is wide.

Description

A kind of battery charging circuit

Technical field

The utility model relates to a kind of charging circuit, specifically a kind of battery charging circuit.

Background technology

Along with science and technology and the development of the Internet, people are more and more stronger for the dependence of the portable equipments such as mobile phone, particularly for the people often needing to go on business, charger is that travelling is indispensable certainly, all volume is larger for existing a lot of charger, internal circuit is complicated, takes up room large, brings very big inconvenience to carrying of people.

Utility model content

The purpose of this utility model is the battery charging circuit providing a kind of volume little, to solve the problem proposed in above-mentioned background technology.

For achieving the above object, the utility model provides following technical scheme:

A kind of battery charging circuit, comprises chip U1, resistance R1, electric capacity C1, light-emitting diode D1, relay J, key switch S1 and key switch S2, described chip U1 pin 4 is all connected power supply VCC2 with chip U1 pin 8, chip U1 pin 7 connecting luminous diode D1 negative pole, light-emitting diode D1 positive pole contact resistance R1, and the resistance R1 other end connects power supply VCC1 respectively, resistance R5, resistance R6 and resistance R7, resistance R7 other end connecting luminous diode D3 positive pole, light-emitting diode D3 negative pole connects relay J contact J-1 pin a, the relay J contact J-1 pin b contact resistance R6 other end, and relay J contact J-1 pin c connects batteries E positive pole respectively, electric capacity C2, key switch S2, potentiometer RP2 and potentiometer RP1, the potentiometer RP2 other end connects batteries E negative pole respectively, the electric capacity C2 other end, the potentiometer RP1 other end, triode VT1 emitter, resistance R4, light-emitting diode D2 negative pole, chip U1 pin 1, electric capacity C1 and key switch S1, the key switch S1 other end connects potentiometer RP1 slide plate and chip U1 pin 2 respectively, described potentiometer RP2 slide plate connects the key switch S2 other end and chip U1 pin 6 respectively, described triode VT1 collector electrode connects diode D4 positive pole and relay J coil respectively, the relay J coil other end is the contact resistance R5 other end and diode D4 negative pole respectively, triode VT1 base stage is contact resistance R3 and the resistance R4 other end respectively, the resistance R3 other end connects chip U1 pin 3 and resistance R2 respectively, resistance R2 other end connecting luminous diode D2 positive pole, described chip U1 model is NE555.

As further program of the utility model: described power supply VCC1 voltage is 16V.

As further program of the utility model: described power supply VCC2 voltage 5V.

As the utility model further scheme: described batteries E rated voltage is 12V.

Compared with prior art, the beneficial effects of the utility model are: the utility model battery charging circuit structure is simple, the electricity storage condition of batteries E can be observed very easily, limitation function is overcharged when being full of electricity, in addition at storage battery E two ends shunt capacitance C2, clutter of effectively worrying, ensure the charging safety of storage battery E, fail safe is high, also has pressure charging/discharging function, applied widely.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of battery charging circuit.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Refer to Fig. 1, in the utility model embodiment, a kind of battery charging circuit, comprises chip U1, resistance R1, electric capacity C1, light-emitting diode D1, relay J, key switch S1 and key switch S2, chip U1 pin 4 is all connected power supply VCC2 with chip U1 pin 8, chip U1 pin 7 connecting luminous diode D1 negative pole, light-emitting diode D1 positive pole contact resistance R1, and the resistance R1 other end connects power supply VCC1 respectively, resistance R5, resistance R6 and resistance R7, resistance R7 other end connecting luminous diode D3 positive pole, light-emitting diode D3 negative pole connects relay J contact J-1 pin a, the relay J contact J-1 pin b contact resistance R6 other end, and relay J contact J-1 pin c connects batteries E positive pole respectively, electric capacity C2, key switch S2, potentiometer RP2 and potentiometer RP1, the potentiometer RP2 other end connects batteries E negative pole respectively, the electric capacity C2 other end, the potentiometer RP1 other end, triode VT1 emitter, resistance R4, light-emitting diode D2 negative pole, chip U1 pin 1, electric capacity C1 and key switch S1, the key switch S1 other end connects potentiometer RP1 slide plate and chip U1 pin 2 respectively, potentiometer RP2 slide plate connects the key switch S2 other end and chip U1 pin 6 respectively, triode VT1 collector electrode connects diode D4 positive pole and relay J coil respectively, the relay J coil other end is the contact resistance R5 other end and diode D4 negative pole respectively, triode VT1 base stage is contact resistance R3 and the resistance R4 other end respectively, the resistance R3 other end connects chip U1 pin 3 and resistance R2 respectively, resistance R2 other end connecting luminous diode D2 positive pole, chip U1 model is NE555.

Power supply VCC1 voltage is 16V.

Power supply VCC2 voltage 5V.

Batteries E rated voltage is 12V.

Operation principle of the present utility model is: refer to Fig. 1, the core of circuit is made up of " hysteresis loop comparator " NE555, RP1 and RP2 forms sample circuit, D1 ~ D3 is charged state instruction, S1, S2 are touch key switch, can be used for Non-follow control charging process, make circuit become more flexible.

This circuit core is chip NE555, when batteries E is under-voltage condition (as 1OV), the lower limit of the hysteresis loop comparator that the voltage that sample circuit exports forms lower than NE555 and peripheral circuit thereof, now, 3 pin of chip NE555 export high level, VT1 conducting, relay J adhesive, relay J contact J-1 gets to b pin, power supply VCC1 charges to batteries E through R6, through certain hour, batteries E voltage raises gradually with charging process, when higher than the magnitude of voltage preset, the voltage that sample circuit exports forms the upper limit of hysteresis loop comparator higher than NE555, now, the 3 pin output low levels of NE555, VT1 ends, relay J discharges, relay J contact J-1 gets to a pin, power supply VCC1 provides faint supplemental current through R7 and D3 to batteries E, if batteries E is discharged, then when batteries E voltage again lower than set lower in limited time, circuit just overturns again as charged state, therefore, there is a return difference in this process, the meaning of this hysteresis just, be in hysteresis at batteries E voltage after sampling, time between lower limit, no matter which kind of state circuit is in, press S1, circuit all can be forced to transfer charged state to, press S2, then compulsory withdrawal charging.This function is supplemented electric to meeting an urgent need and idle is energy-conservation all highly significant.According to operation principle: when D2 lights, represent and charge; When D1 and D3 lights when D2 extinguishes, then represent that batteries E is normal state-of-charge.The number that batteries E is charged can also be judged according to the brightness of D3.

To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.

In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.

Claims (4)

1. a battery charging circuit, comprises chip U1, resistance R1, electric capacity C1, light-emitting diode D1, relay J, key switch S1 and key switch S2, it is characterized in that, described chip U1 pin 4 is all connected power supply VCC2 with chip U1 pin 8, chip U1 pin 7 connecting luminous diode D1 negative pole, light-emitting diode D1 positive pole contact resistance R1, the resistance R1 other end connects power supply VCC1 respectively, resistance R5, resistance R6 and resistance R7, resistance R7 other end connecting luminous diode D3 positive pole, light-emitting diode D3 negative pole connects relay J contact J-1 pin a, the relay J contact J-1 pin b contact resistance R6 other end, and relay J contact J-1 pin c connects batteries E positive pole respectively, electric capacity C2, key switch S2, potentiometer RP2 and potentiometer RP1, the potentiometer RP2 other end connects batteries E negative pole respectively, the electric capacity C2 other end, the potentiometer RP1 other end, triode VT1 emitter, resistance R4, light-emitting diode D2 negative pole, chip U1 pin 1, electric capacity C1 and key switch S1, the key switch S1 other end connects potentiometer RP1 slide plate and chip U1 pin 2 respectively, described potentiometer RP2 slide plate connects the key switch S2 other end and chip U1 pin 6 respectively, described triode VT1 collector electrode connects diode D4 positive pole and relay J coil respectively, the relay J coil other end is the contact resistance R5 other end and diode D4 negative pole respectively, triode VT1 base stage is contact resistance R3 and the resistance R4 other end respectively, the resistance R3 other end connects chip U1 pin 3 and resistance R2 respectively, resistance R2 other end connecting luminous diode D2 positive pole, described chip U1 model is NE555.

2. battery charging circuit according to claim 1, is characterized in that, described power supply VCC1 voltage is 16V.

3. battery charging circuit according to claim 1, is characterized in that, described power supply VCC2 voltage 5V.

4. battery charging circuit according to claim 1, is characterized in that, described batteries E rated voltage is 12V.