CN202535574U - Charging indication lamp circuit - Google Patents
Charging indication lamp circuit Download PDFInfo
- Publication number
- CN202535574U CN202535574U CN201220127553XU CN201220127553U CN202535574U CN 202535574 U CN202535574 U CN 202535574U CN 201220127553X U CN201220127553X U CN 201220127553XU CN 201220127553 U CN201220127553 U CN 201220127553U CN 202535574 U CN202535574 U CN 202535574U
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- CN
- China
- Prior art keywords
- emitting diode
- resistance
- light
- circuit
- charging
- 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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Disclosed in the utility model is a charging indication lamp circuit, which is connected between a charging power supply and a power storage circuit. The charging indication lamp circuit comprises a first resistor, a light emitting diode and a second resistor. The anode of the light emitting diode is connected with the charging power supply by the first resistor and the cathode thereof is connected with the power storage circuit; and the second resistor is connected in parallel with the light emitting diode. According to the utility model, when a reverse charging situation occurs at the power storage circuit, the indication lamp does not emit lights, thereby avoiding false indication.
Description
Technical field
The utility model relates to a kind of charging indicator light circuit.
Background technology
At present, simple charging indicator light circuit mostly just is serially connected in indicator light between charge power supply and the accumulate circuit, and the accumulate circuit is generally storage battery or by built-up circuits such as storage battery, diode and resistance.During charging, indicator light is bright; When stopping to charge, indicator light should not work.Yet the diode reverse impedance ratio of sometimes selecting is less, and at this moment, the accumulate circuit fills circuit is counter, causes indicator light still can send faint light, thereby causes wrong indication.
Summary of the invention
The purpose of the utility model is to overcome the defective of prior art and a kind of charging indicator light circuit is provided, and makes that indicator light was not luminous, has avoided wrong indication when the accumulate circuit took place by counter filling.
The technical scheme that realizes above-mentioned purpose is:
A kind of charging indicator light circuit is connected between charge power supply and the accumulate circuit, and this charging indicator light circuit comprises first resistance, light-emitting diode and second resistance, wherein:
Light-emitting diode, its positive pole connects said charge power supply through first resistance, and its negative pole connects said accumulate circuit;
Said second resistance is parallelly connected with light-emitting diode.
Above-mentioned charging indicator light circuit, wherein, the resistance of said second resistance is greater than the conduction impedance of said light-emitting diode, and less than the shutoff impedance of said light-emitting diode.
The beneficial effect of the utility model is:
The utility model makes when stopping to charge that through resistance of parallel connection on light-emitting diode the accumulate circuit passes through this resistance because of the anti-electric current of exporting that fills, and no current has been avoided wrong indication through not luminous on the light-emitting diode.Simultaneously, the utility model is simple in structure and be easy to realize.
Description of drawings
Fig. 1 is the circuit diagram of the charging indicator light circuit of the utility model.
Embodiment
To combine accompanying drawing that the utility model is described further below.
See also Fig. 1, the charging indicator light circuit of the utility model is connected between charge power supply 1 and the accumulate circuit 2, and this charging indicator light circuit comprises first resistance R 1, light-emitting diode D and second resistance R 2, wherein:
The positive pole of light-emitting diode D connects charge power supply 1 through first resistance R 1, and negative pole connects accumulate circuit 2;
Second resistance R 2 is parallelly connected with light-emitting diode D, and the resistance of second resistance R 2 is much larger than the conduction impedance of light-emitting diode D, and much smaller than the shutoff impedance of light-emitting diode D.
In the present embodiment, accumulate circuit 2 is composed in series by storage battery and diode.
When charge power supply 1 charging, light-emitting diode D conducting is luminous, the indication charging.First resistance R, 1 restriction conducting electric current is because the resistance of second resistance R 2 is much larger than the conduction impedance of light-emitting diode D, so flow through the work that the electric current of second resistance R 2 does not influence light-emitting diode D; When charge power supply 1 stopped to charge, because the resistance of second resistance R 2 is much smaller than the shutoff impedance of light-emitting diode D, the electric current of output flow through second resistance R 2 when accumulate circuit 2 took place by counter filling, and did not have electric current to flow through on the light-emitting diode D, so not luminous.
Above embodiment only supplies to explain the usefulness of the utility model; But not to the restriction of the utility model; The technical staff in relevant technologies field under the situation of spirit that does not break away from the utility model and scope, can also make various conversion or modification; Therefore all technical schemes that are equal to also should belong to the category of the utility model, should be limited each claim.
Claims (2)
1. a charging indicator light circuit is connected between charge power supply and the accumulate circuit, it is characterized in that, this charging indicator light circuit comprises first resistance, light-emitting diode and second resistance, wherein:
Light-emitting diode, its positive pole connects said charge power supply through first resistance, and its negative pole connects said accumulate circuit;
Said second resistance is parallelly connected with light-emitting diode.
2. charging indicator light circuit according to claim 1 is characterized in that, the resistance of said second resistance is greater than the conduction impedance of said light-emitting diode, and less than the shutoff impedance of said light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220127553XU CN202535574U (en) | 2012-03-30 | 2012-03-30 | Charging indication lamp circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220127553XU CN202535574U (en) | 2012-03-30 | 2012-03-30 | Charging indication lamp circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202535574U true CN202535574U (en) | 2012-11-14 |
Family
ID=47136723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220127553XU Expired - Fee Related CN202535574U (en) | 2012-03-30 | 2012-03-30 | Charging indication lamp circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202535574U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151818A (en) * | 2013-03-21 | 2013-06-12 | 上海斐讯数据通信技术有限公司 | Charging indicating system |
-
2012
- 2012-03-30 CN CN201220127553XU patent/CN202535574U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151818A (en) * | 2013-03-21 | 2013-06-12 | 上海斐讯数据通信技术有限公司 | Charging indicating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20200330 |