CN2153897Y - Automatic constant current charger for ni battery - Google Patents
Automatic constant current charger for ni battery Download PDFInfo
- Publication number
- CN2153897Y CN2153897Y CN 92227977 CN92227977U CN2153897Y CN 2153897 Y CN2153897 Y CN 2153897Y CN 92227977 CN92227977 CN 92227977 CN 92227977 U CN92227977 U CN 92227977U CN 2153897 Y CN2153897 Y CN 2153897Y
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- China
- Prior art keywords
- resistance
- charging
- battery
- circuit
- constant current
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- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an automatic constant current charger for a Ni-Cd battery, comprising a piece of time-base circuit, a one crystal triode, a resistance-capacitor element, a rectifying element and a luminous diode, wherein, the time-base circuit and a resistance sampling network can automatically access a battery and carry out the detecting for deciding to charge whether or not; the constant current charge can be automatically control; after the charging is finished, the charging is automatically convert into the trickle charging status; the indication for charging finish can be given. The battery can not be damaged for the long-term charging; the utility model is in particular suitable for the occasion that the emergency backup battery in the status of charging finish is required; simultaneously, the utility model has the advantages of simple circuit, low cost and high reliability.
Description
The invention discloses a kind of ickel-cadmium cell automatic constant current charger.
Adopt circuit control a lot of to the method for ickel-cadmium cell charging at present, whether the method for control is the voltage that is recharged battery to be detected with the decision current switch connect mostly." electronics newspaper " the 39th phase in 1991 that publish in Chengdu had once opened up the circuit for charging machine special edition specially and had been introduced, the method of carrying out automatic charge control with discrete component introduced in " automatic charger " literary composition wherein, its shortcoming is that the discrete component gain is low, adopt multistage amplification, relay self-insurance etc. has just increased the complex circuit degree, reliability reduces, and increased cost, especially because there is not the bypass charging circuit, holding function because of circuit, can not recover automatic charging even make charging finish back battery capacity decline yet, like this, if rechargeable battery end to be charged back is untimely taking away, will battery capacity be descended so that most of the forfeiture can not be used as the battery charge of dc standby power because of the loss of self-discharge of battery and charging circuit access increase, can not realize the Automatic Control of charging process.
The purpose of this invention is to provide a kind of constant current charge to ickel-cadmium cell and realize Automatic Control, the charged state indication is clear and definite, is applicable to the battery charger of general ickel-cadmium cell charging and emergent dc standby power.
Automatic control circuit and charging indication that the present invention is made up of time-base circuit ［ 555 ］ and corresponding resistance, electric capacity, potentiometer, voltage stabilizing didoe, light-emitting diode, the DC power supply circuit that rectifier diode ［ D1～D4 ］ and electric capacity ［ C1 ］ are formed, transistor ［ BG ］ is formed with five parts such as bypass boost charge circuit that respective diode is formed with constant-current circuit and resistance ［ R11 ］ that corresponding resistor, voltage stabilizing didoe are formed.
Fig. 1 is a line map of the present invention, and operation principle is explained as follows:
The truth table of time-base circuit ［ 555 ］ is as follows:
| S | R | MR | Q | Q |
| ≤1/2Vvc | ＊ | High | High | Turn-off |
| ≥1/2Vvc | ≥Vvc | High | Low | Open-minded |
| ＊ | ＊ | Low | Low | Open-minded |
Annotate: * is a free position
Alternating current pressuring meridian rectification circuit ［ D1～D4 ］ rectification, electric capacity ［ C1 ］ filtering through step-down obtain level and smooth direct voltage, and this voltage is supplied with fixing direct voltage Vvc of time-base circuit ［ 555 ］ 5 pin ［ Vc ］ through resistance ［ R1 ］, voltage stabilizing didoe ［ D5 ］.4 pin ［ MR ］ of time-base circuit connect high level, and 3 pin ［ Q ］ of time-base circuit connect the constant-current circuit of being made up of resistance ［ R4 ］, transistor ［ BG ］ and voltage stabilizing didoe ［ D6 ］, resistance ［ R5 ］.This circuit makes transistor ［ BG ］ base stage be fixed the position because the reverse step-down of voltage stabilizing didoe ［ D6 ］ is constant through resistance ［ R4 ］, makes charging current be always a constant.Constant current output is through diode in series ［ D7 ］, ［ D8 ］ is added to and is recharged on the battery, resistance ［ R6 ］, ［ R7 ］, potentiometer ［ W ］ is taken a sample to the voltage that is recharged battery, sampling voltage is sent into time-base circuit 6 pin ［ R ］, resistance ［ R8 ］, ［ R9 ］ is again to the voltage sampling of time-base circuit 6 pin, send into time-base circuit 2 pin ［ S ］, resistance ［ R8 ］, the selection of ［ R9 ］ makes the voltage on the resistance ［ R9 ］ be slightly larger than half a certain value of voltage on time-base circuit 6 pin, like this, from the truth table of time-base circuit as can be seen, make it when charging voltage reaches threshold voltage (the expression battery is full of) as long as set up potentiometer ［ W ］, voltage on time-base circuit 6 pin ［ R ］ is just shortly past Vvc, and at this moment time-base circuit 2 pin ［ S ］ are gone up voltage greater than 1/2Vvc, at this moment Q=0, charging stops.Light-emitting diode ［ LED2 ］ (red) extinguishes, and the Q conducting, light-emitting diode ［ LED1 ］ (green) is bright, and the expression charging finishes, and battery is in full state.When the cell voltage deficiency, make sampling voltage on time-base circuit 6 pin ［ R ］ less than a certain value of Vvc, and when at this moment the sampling voltage on time-base circuit 2 pin ［ S ］ is just less than 1/2Vvc, from the truth table of time-base circuit as can be seen, Q=1 at this moment, charging beginning, light-emitting diode ［ LED2 ］ (red) is bright, and Q is in off state, and light-emitting diode ［ LED1 ］ (green) extinguishes, and the expression charging is carried out.Electric capacity ［ C2 ］ is to turn-off in advance in order to prevent external interference from making the time-base circuit false triggering to make the battery charge deficiency.
Resistance ［ R11 ］ is bypass boost charge resistance, make when charging finishes, when time-base circuit 3 pin turn-off Q=0, power supply carries out boost charge by this resistance to being recharged battery, it is very little to replenish electric current, battery can be maintained be full of electricity condition, can offset the self discharge of battery just, diode ［ D7 ］, ［ D8 ］ influence the operate as normal of constant-current circuit and time-base circuit for preventing to be recharged battery by resistance ［ R11 ］ to time-base circuit and commutating circuit discharge and power supply.
Press when K switch, make charging be in fast state, can shorten the charging interval.
Claims (2)
1, a kind of ickel-cadmium cell automatic constant current charger, general battery automatic charger is made up of DC power supply, current-limiting circuit, voltage detecting, current switch and indicating circuit.Of the present utility model being characterised in that: current detection section is made up of time-base circuit [555], resistance [R1], voltage stabilizing didoe [D5], resistance [R6], [R7], [R8], [R9] and potentiometer [W].Constant Electric Current routing resistance [R4], voltage stabilizing didoe [D6], transistor [BG], resistance [R5] are formed, constant current output is added to through diode [D7], [D8] and is recharged the pond positive pole, and resistance [R11] is connected across rectified current positive output end and diode [D7], [D8] common ends.
2, ickel-cadmium cell automatic constant current charger as claimed in claim 1 is characterized in that: the bypass boost charge circuit that diode in series ［ D7 ］, ［ D8 ］ and resistance ［ R11 ］ are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92227977 CN2153897Y (en) | 1992-07-14 | 1992-07-14 | Automatic constant current charger for ni battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92227977 CN2153897Y (en) | 1992-07-14 | 1992-07-14 | Automatic constant current charger for ni battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2153897Y true CN2153897Y (en) | 1994-01-19 |
Family
ID=33771780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92227977 Expired - Fee Related CN2153897Y (en) | 1992-07-14 | 1992-07-14 | Automatic constant current charger for ni battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2153897Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664442A (en) * | 2012-05-19 | 2012-09-12 | 韩春龙 | General charger for nickel-cadmium and nickel-hydrogen rechargeable batteries |
| CN106469921A (en) * | 2015-08-22 | 2017-03-01 | 重庆宁来科贸有限公司 | A kind of constant current time controlled charger |
| CN106469922A (en) * | 2015-08-22 | 2017-03-01 | 重庆宁来科贸有限公司 | Constant-current type innovates SCR type charging device |
| CN106786819A (en) * | 2015-11-22 | 2017-05-31 | 重庆宁来科贸有限公司 | Constant-current charge equipment with acousto-optic hint |
| CN107887964A (en) * | 2017-11-29 | 2018-04-06 | 国网河南省电力公司社旗县供电公司 | A kind of adjustable charger circuit of voltage |
| CN107979123A (en) * | 2017-08-08 | 2018-05-01 | 上海裕芯电子科技有限公司 | A kind of supply self adaptation lithium battery charging management circuit |
-
1992
- 1992-07-14 CN CN 92227977 patent/CN2153897Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664442A (en) * | 2012-05-19 | 2012-09-12 | 韩春龙 | General charger for nickel-cadmium and nickel-hydrogen rechargeable batteries |
| CN106469921A (en) * | 2015-08-22 | 2017-03-01 | 重庆宁来科贸有限公司 | A kind of constant current time controlled charger |
| CN106469922A (en) * | 2015-08-22 | 2017-03-01 | 重庆宁来科贸有限公司 | Constant-current type innovates SCR type charging device |
| CN106786819A (en) * | 2015-11-22 | 2017-05-31 | 重庆宁来科贸有限公司 | Constant-current charge equipment with acousto-optic hint |
| CN107979123A (en) * | 2017-08-08 | 2018-05-01 | 上海裕芯电子科技有限公司 | A kind of supply self adaptation lithium battery charging management circuit |
| CN107979123B (en) * | 2017-08-08 | 2024-03-22 | 上海裕芯电子科技有限公司 | Power supply self-adaptive lithium battery charging management circuit |
| CN107887964A (en) * | 2017-11-29 | 2018-04-06 | 国网河南省电力公司社旗县供电公司 | A kind of adjustable charger circuit of voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |