CN86206342U - Portable automatic electricity charger - Google Patents
Portable automatic electricity charger Download PDFInfo
- Publication number
- CN86206342U CN86206342U CN 86206342 CN86206342U CN86206342U CN 86206342 U CN86206342 U CN 86206342U CN 86206342 CN86206342 CN 86206342 CN 86206342 U CN86206342 U CN 86206342U CN 86206342 U CN86206342 U CN 86206342U
- Authority
- CN
- China
- Prior art keywords
- protection
- diode
- portable automatic
- electricity charger
- automatic electricity
- 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 - Lifetime
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a portable automatic electricity charger, providing an automatic charging device which has over-charging protection, reverse connecting protection, short circuit protection and overcurrent protection. The utility model is characterized in that an overcurrent protection device comprising a sampling resistor R4, a diode D6 and an electric condenser C2 is added.
Description
The utility model belongs to the storage battery automatic charge device.
The charger of prior art has and overcharges as shown in Figure 1, short circuit and reverse connecting protection effect.This device has preferable performance price ratio.Its weak point can not be protected for the controllable silicon overcurrent that reasons such as mains fluctuations cause, China (particularly rural area) power-supply fluctuation at present is also relatively more serious, and influence is promoted the use of.
The existing useful current-limiting resistance restriction of the way maximum current that solves overcurrent; The employing constant-current transistor is arranged; The monostable flipflop of employing control silicon controlled trigger signal etc. is arranged.These ways or energy utilization rate are low, and caloric value is big; Or complex circuit, the cost height.
Task of the present utility model is to solve silicon controlled overcurrent protection problem under cost increase condition seldom.
The utility model such as Fig. 2 are by increasing sampling resistor R
4, diode D
6, capacitor C
2The realization above-mentioned purpose.
Below in conjunction with accompanying drawing 1, the course of work of accompanying drawing 2 explanation circuit.
Power transformer T among Fig. 1
1With diode D
1To D
4Form step-down rectifying circuit, ammeter A and voltmeter V indicate charging current and cell voltage respectively, and remainder is finished the automatic control of charging process.Unijunction transistor UJT, resistance R
1, R
2, R
3With capacitor C
1Form pulse-generating circuit, utilize transformer T
2The control board that pulse is exported to controllable silicon SCR is in order to trigger SCR.SCR is subjected to conduct electricity from the pulse-triggered of pulse generator when cell voltage is low, and beginning is to battery charge.Unijunction transistor UJT emitter-base bandgap grading is connected to voltage stabilizing didoe D
5, when battery is charged to the needed excitation voltage V of UJT
PGreater than D
5Zener voltage V
ZThe time UJT failure of oscillations, SCR is disconnected, stop charging.This current potential can be by R
2Select.When circuit output end was short-circuited, unijunction transistor did not have operating voltage, and controllable silicon SCR is not switched on, if battery polar connects instead, the charging effect can not take place because of UJT has operating voltage yet.
Essential characteristic of the present utility model is to increase sampling resistor R
4, diode D
6, capacitor C
2Form circuit overcurrent protection such as Fig. 2, charging current is at sampling resistor R
4Last generation voltage drop, this voltage and cell voltage superposition are by diode D
6To capacitor C
2Charging.Electric current is big more, capacitor C
2On voltage also high more, C
2On voltage raise and to cause the unijunction transistor UJT failure of oscillations, controllable silicon SCR is turn-offed.C
2On voltage pass through resistance R
2R
3Discharge reduces gradually, low to a certain degree the time vibration restart, so circulation, charging process is intermittently state, makes average current decline, has protected controllable silicon.
Claims (1)
- A kind of by power transformer T 1, diode D 1To D 4, reverse-blocking tetrode thyristor SCR triggers controller, and the automatic charge device that ammeter A and voltmeter V form is characterized in that having increased by sampling resistor R 4, diode D 6With capacitor C 2The overcurrent protective device of forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206342 CN86206342U (en) | 1986-08-28 | 1986-08-28 | Portable automatic electricity charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206342 CN86206342U (en) | 1986-08-28 | 1986-08-28 | Portable automatic electricity charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86206342U true CN86206342U (en) | 1987-12-12 |
Family
ID=4809001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86206342 Expired - Lifetime CN86206342U (en) | 1986-08-28 | 1986-08-28 | Portable automatic electricity charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86206342U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790348A (en) * | 2015-01-13 | 2016-07-20 | 英特希尔美国公司 | Overcurrent protection in a battery charger |
| CN111157928A (en) * | 2020-01-07 | 2020-05-15 | 吉林大学 | Material magnetic on-line rapid detection system and detection method thereof |
-
1986
- 1986-08-28 CN CN 86206342 patent/CN86206342U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790348A (en) * | 2015-01-13 | 2016-07-20 | 英特希尔美国公司 | Overcurrent protection in a battery charger |
| CN111157928A (en) * | 2020-01-07 | 2020-05-15 | 吉林大学 | Material magnetic on-line rapid detection system and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |