GB1252006A - - Google Patents
Info
- Publication number
- GB1252006A GB1252006A GB1225568A GB1252006DA GB1252006A GB 1252006 A GB1252006 A GB 1252006A GB 1225568 A GB1225568 A GB 1225568A GB 1252006D A GB1252006D A GB 1252006DA GB 1252006 A GB1252006 A GB 1252006A
- Authority
- GB
- United Kingdom
- Prior art keywords
- battery
- voltage
- transistor
- current
- zener diode
- 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
Links
Classifications
-
- H02J7/96—
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
1,252,006. Battery charging circuits. N.V. TOOLS Ltd. 12 Feb., 1969 [13 March, 1968], No. 12255/68. Heading H2H. [Also in Division G3] A battery charging circuit only delivers an appreciable charging current when the voltage across its output terminals is greater than a first non-zero value below the completely discharged battery voltage, and less than a value below the fully charged voltage of the battery. The charging current in a part of this range is substantially constant. As shown in Fig. 2, the battery B is connected in series with a first transistor TR1, the base of which is supplied from a second transistor TR2 only when the battery voltage is sufficient to break down a Zener diode ZD2. This arrangement prevents current flow if the output terminals of the circuit are shorted together. Initially, a further Zener diode ZD1 will be blocked, and the current will rise rapidly as the battery is charged until a voltage is reached at which the Zener diode ZD1 breaks down. The charging current will now remain substantially constant with increasing voltage until the fully-charged voltage is almost reached, whereupon the current will rapidly decrease owing to the emitter potential of transistor TR2 approaching the base potential of the same transistor and thus reducing the drive to transistor TR1. A diode D1 prevents any current flow if the battery is connected the wrong way round.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1225568 | 1968-03-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1252006A true GB1252006A (en) | 1971-11-03 |
Family
ID=10001211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1225568A Expired GB1252006A (en) | 1968-03-13 | 1968-03-13 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1252006A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2524790A1 (en) * | 1974-06-10 | 1975-12-11 | Gates Rubber Co | CIRCUIT ARRANGEMENT FOR A BATTERY CHARGER |
| US3997830A (en) * | 1974-11-27 | 1976-12-14 | Rca Corporation | Satellite battery reconditioning system and method |
| US4458195A (en) * | 1982-03-02 | 1984-07-03 | R. E. Phelon Company, Inc. | Electronic regulator for alternator battery charging system |
| GB2178608A (en) * | 1985-06-14 | 1987-02-11 | Yu Zhiwei | Recharging dry cell batteries |
-
1968
- 1968-03-13 GB GB1225568A patent/GB1252006A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2524790A1 (en) * | 1974-06-10 | 1975-12-11 | Gates Rubber Co | CIRCUIT ARRANGEMENT FOR A BATTERY CHARGER |
| US3997830A (en) * | 1974-11-27 | 1976-12-14 | Rca Corporation | Satellite battery reconditioning system and method |
| US4458195A (en) * | 1982-03-02 | 1984-07-03 | R. E. Phelon Company, Inc. | Electronic regulator for alternator battery charging system |
| GB2178608A (en) * | 1985-06-14 | 1987-02-11 | Yu Zhiwei | Recharging dry cell batteries |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PE20 | Patent expired after termination of 20 years |