CN2227383Y - Charger for accumulator of radio pager - Google Patents
Charger for accumulator of radio pager Download PDFInfo
- Publication number
- CN2227383Y CN2227383Y CN 94247928 CN94247928U CN2227383Y CN 2227383 Y CN2227383 Y CN 2227383Y CN 94247928 CN94247928 CN 94247928 CN 94247928 U CN94247928 U CN 94247928U CN 2227383 Y CN2227383 Y CN 2227383Y
- Authority
- CN
- China
- Prior art keywords
- charging
- pin
- voltage
- resistance
- triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a charger for accumulators of radio pagers, which can carry out safe charging on the accumulators of radio pagers, and comprises a constant current charging circuit, a trickling charging circuit and a control portion composed of a 555 time-base circuit which controls the charging of a constant-current source to automatically switch to trickling charging when the accumulator voltage reaches to a certain value. When the charging capacity reaches to a certain value, the charging mode is automatically switched to trickling charging, which effectively protects the accumulators, avoids the damage to accumulators owing to overcharging, and assures the safety of charging.
Description
The utility model relates to a kind of charger that charges every the column sealed cell batteries of nickel that radio pager is used.
At present the battery that uses of radio pager mostly is every the column sealed cell batteries of nickel, and the charger that this charge in batteries is used is not a undercharge often, overcharges exactly, and overcharging tends to damage battery pole plates, influences battery useful life.
Task of the present utility model provides a kind of charger that the radio pager storage battery is carried out safe charging.
Task of the present utility model is finished as follows, it is the standard-required by the IEC of International Electrotechnical Commission, adopt constant current source charging, it includes the D.C. regulated power supply that civil power is become low-voltage DC, resistance, triode and storage battery to be charged are serially connected between D.C. regulated power supply voltage and the ground, constitute the constant current source charging circuit, another road resistance and triode also and storage battery to be charged be serially connected between D.C. regulated power supply voltage and the ground, constitute trickle charging circuit, it is characterized in that: control constant current source charging automatically switches to the charging of trickle source when battery tension is charged to certain value the control section that constitutes by 555 time-base circuits in addition.When charging reaches certain value, automatically switch to the charging of trickle source, protect storage battery effectively, avoid overcharging and cause battery to damage, guarantee safe charging.
Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.
Fig. 1 be the utility model proposes to the electrical schematic diagram of radio pager every the charger of ickel accumulator charging.
In the accompanying drawings, with the 220V alternating current through transformer T
1Transformation is by rectifying block N
3Rectification, three terminal regulator N
2Output voltage V cc after the voltage stabilizing, capacitor C
4, C
5, C
6And C
7Form filter circuit.Current-limiting resistance R
6With triode V
2Form the constant-current source of charging usefulness and storage battery R to be charged
1Be serially connected between D.C. regulated power supply voltage vcc and the ground wire current-limiting resistance R
8With triode V
3Form the trickle source also with storage battery R to be charged
1Be serially connected between D.C. regulated power supply power supply and the ground wire, control in addition automatically switch to when constant current source charging to battery tension is charged to certain value Vc trickle charge by 555 time-base circuit N
1The control section that constitutes.555 time-base circuits are hereinafter to be referred as N
1, with N
1Meet stabilized voltage power supply voltage vcc and systematically, i.e. N by common mode
14 pin and 8 pin meet Vcc, 7 pin, 1 pin ground connection, the voltage of 5 foot control system voltage ends is by the resistance R that is serially connected between Vcc and the ground
1, potentiometer RP
1Dividing potential drop provides Vc, can and meet a voltage-stabiliser tube V at potentiometer PP1 two ends
7And capacitor C
1, make voltage V
1Stable.Power source voltage Vcc is through resistance R
2With capacitor C
2Earth connection, capacitor C
2And meet a short switch SW
1, contact a meets N
12 pin, promptly descend comparator input terminal, as long as a point voltage is greater than 1/2VC, W
1Output voltage is in by high step-down state to be flipped, and battery tension is that the b point is connected to 6 pin, promptly goes up the input of comparator, when its voltage is higher than Vc, can make N
1Output voltage is overturn by high step-down, N
13 pin, the one tunnel through resistance R
3Be connected to the triode V of trickle source charging
3Base stage, another road is through Light-Emitting Diode V
4, its negative pole C point meets the triode V of constant current source charging
2Base stage, the C point is also and resistance R
5With triode V
1Collector electrode join, its grounded emitter, its base stage is through resistance R
4Be connected on 3 pin.
Click short switch SW during startup
1, capacitor C
2Discharge makes N
12 pin be low level, 3 pin output high level, N
13 pin through resistance R
4Give triode V
1Base flow is provided, makes its conducting.Be connected on triode V
2Resistance R on the base stage
5With triode V
1Be triode V
2Base flow is provided, makes triode V
2Conducting, constant-current source work, power source voltage Vcc is by resistance R
6Through triode V
2Be storage battery R
1Constant current charge, light-emitting diode V
4Conducting shows the constant current charge state, resistance R
2Also constantly to capacitor C
2Charging raises a point current potential, when being increased to 1/2c, and R
1Circuit is in state to be flipped, to storage battery R
1Constantly charging constantly raises its b point current potential, when voltage reaches the Vc value, makes N
1Upset, 3 pin output low levels, triode V
1End triode V
2No bias current also ends, constant current source charging indication light-emitting diode V
4Also end, stop the storage battery constant current charge, 3 pin place electronegative potentials make triode V
3Conducting, power supply passes through resistance R
8, through trickle source charging indication light-emitting diode V
6With triode V
3To storage battery R
1Trickle charge.Diode V on b point place serial connection
5Can prevent battery discharging.Regulator potentiometer RP
1, the magnitude of voltage of scalable Vc, different for No. 5 or No. 7 storage battery constant current source charging with trickle source charging current, the resistance R that can respectively constant-current source and trickle subject string be connect by two double-pole double throw switch S
6, R
8Switch to resistance R
7, R
9
Claims (2)
1, a kind of radio pager battery charger, it includes the D.C. regulated power supply that civil power is become low-voltage DC, current-limiting resistance R
6With triode V
2Form the constant-current source of charging usefulness and storage battery R to be charged
1Be serially connected between D.C. regulated power supply voltage vcc and the ground wire current-limiting resistance R
8With triode V
3Form the trickle source also with storage battery R to be charged
1Be serially connected between D.C. regulated power supply and the ground wire, it is characterized in that: control in addition constant current source charging when battery tension is charged to certain value, automatically switch to trickle source charging by 555 time-base circuit W
1The control section that constitutes.
2, a kind of radio pager battery charger according to claim 1 is characterized in that: the control section that control constant current source charging and the charging of trickle source are switched is 555 time-base circuit N
1Meet stabilized voltage power supply voltage vcc and systematically, i.e. N by common mode
14 pin and 8 pin meet Vcc, 7 pin, 1 pin ground connection, the voltage of 5 foot control system voltage ends is by the resistance R that is serially connected between Vcc and the ground
1, potentiometer RP
1Dividing potential drop provides Vc, at potentiometer RP
1Two ends also meet a voltage-stabiliser tube V
7, power source voltage Vcc is through resistance R
2With capacitor C
2Earth connection, capacitor C
2And meet a short switch SW
1, contact a meets N
12 pin, promptly descend comparator input terminal, as long as a point voltage is greater than 1/2Vc, N
1Be in state to be flipped, battery tension is that the b point is connected to 6 pin, the input of last comparator, N when its voltage is higher than Vc
1Turning, N
13 pin one tunnel through resistance R
3Be connected to the triode V of trickle source charging
3Base stage, another road is through Light-Emitting Diode V
4, its negative pole C point meets the triode V of permanent power source charges
2Base stage, C point connecting resistance R
5With triode V
1Collector electrode join, its grounded emitter, its base stage is through resistance R
4Be connected on 3 pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94247928 CN2227383Y (en) | 1994-12-22 | 1994-12-22 | Charger for accumulator of radio pager |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94247928 CN2227383Y (en) | 1994-12-22 | 1994-12-22 | Charger for accumulator of radio pager |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2227383Y true CN2227383Y (en) | 1996-05-15 |
Family
ID=33853005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94247928 Expired - Fee Related CN2227383Y (en) | 1994-12-22 | 1994-12-22 | Charger for accumulator of radio pager |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2227383Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107912074A (en) * | 2016-02-05 | 2018-04-13 | 广东欧珀移动通信有限公司 | For the charging system of terminal, charging method and terminal |
-
1994
- 1994-12-22 CN CN 94247928 patent/CN2227383Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107912074A (en) * | 2016-02-05 | 2018-04-13 | 广东欧珀移动通信有限公司 | For the charging system of terminal, charging method and terminal |
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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 |