CN204465093U - The device of lead-acid battery flashlight charge protection LED - Google Patents
The device of lead-acid battery flashlight charge protection LED Download PDFInfo
- Publication number
- CN204465093U CN204465093U CN201520206017.2U CN201520206017U CN204465093U CN 204465093 U CN204465093 U CN 204465093U CN 201520206017 U CN201520206017 U CN 201520206017U CN 204465093 U CN204465093 U CN 204465093U
- Authority
- CN
- China
- Prior art keywords
- lead
- acid battery
- led
- switch
- flashlight
- 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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses the device of a kind of lead-acid battery flashlight charge protection LED; powered to lead-acid battery E after step-down, bridge rectifier by AC power; lead-acid battery E is connected LED2 through resistance R3 with resistance R4 respectively by a third gear switch; realize strong, weak illumination, the positive terminal that the utility model bridge rectifier exports is connected to the positive terminal of lead-acid battery E through switch.The utility model without stable-pressure device, and protects the LED of lead-acid battery flashlight with third gear switch, structure is simple, cheap, durable in use, safe and reliable, is converted by simple circuit junction, achieves the object greatly extending life of product.Through repeatedly control experiment inspection, effect is very satisfactory, and permanence operation is fine.Be subject to the praise of the old people often using flashlight in daily life.
Description
one, technical field
The utility model relates to the circuit arrangement of lead-acid battery LED flashlight, is to improve the one of battery charger.
two, background technology
The lead-acid battery LED flashlight of universal use on the market now, because it is small and exquisite, attractive in appearance, variation in moulding is multifarious, and cost is low, long service life, the features such as power saving environmental protection, have almost won the accreditation in market with absolute advantage, but low owing to producing with the threshold of manufacture, circuit design has problems, and charging improperly will puncture LED.Can not be luminous after LED is breakdown, but by current discharge, if now switch is in "on" position, of long duration will make battery over-discharge and cause cell damage.Ordinary consumer is difficult to judge really, naturally will in the face of damaging the situation of maintenance.
three, summary of the invention
The purpose of this utility model is to provide a kind of device can protecting the lead-acid battery flashlight charge protection LED of LED in charging process, can avoid, not when charging to the damage of LED, allowing the advantage of LED flashlight bring into play more fully.
The technical solution adopted in the utility model is: the device of lead-acid battery flashlight charge protection LED is powered to lead-acid battery E after step-down, bridge rectifier by AC power; lead-acid battery E is connected LED2 through resistance R3 with resistance R4 respectively by a third gear switch; realize strong, weak illumination, the positive terminal that the utility model bridge rectifier exports is connected to the positive terminal of lead-acid battery E through switch.Rectification in primary circuit is exported the mode being fixedly connected with lead-acid battery E positive and negative terminal and changes into rectification output cathode end by switch connection lead-acid battery positive terminal by the utility model, and namely lead-acid battery E is connected with charging circuit, low-light level lighting circuit and highlight illumination circuit respectively by three position switch.Misoperation during as charged, the comparatively high charge voltage that LED can be caused to damage, be not loaded on LED, LED would not damage.
The utility model without stable-pressure device, and protects the LED of lead-acid battery flashlight with third gear switch, structure is simple, cheap, durable in use, safe and reliable, is converted by simple circuit junction, achieves the object greatly extending life of product.Through repeatedly control experiment inspection, effect is very satisfactory, and permanence operation is fine.Be subject to the praise of the old people often using flashlight in daily life.
four, accompanying drawing explanation
Fig. 1 is existing lead-acid battery electric torch circuit schematic diagram;
Fig. 2 is that the utility model does not throw light on the circuit theory diagrams of chargeable state;
Fig. 3 is that the utility model low-light level illumination can not the circuit theory diagrams of charged state;
Fig. 4 is that the utility model highlight illumination can not the circuit theory diagrams of charged state.
five, embodiment
The device circuit of lead-acid battery flashlight charge protection LED is divided into three parts: 1, step-down, rectification and indicating section, and 2, battery and switch sections, 3, illuminating circuit part.
1, step-down, rectification and indicating section: by AC power, resistance R
1, electric capacity C
1, diode D
1-D
4, resistance R
2and charging indicator light LED
1composition.220VAC power supply obtains the alternating voltage of about 6V after resistance R1, electric capacity C1 dividing potential drop, through diode D
1-D
4the direct voltage of about 4.2V is obtained after bridge rectifier.Resistance R
2and indicator light LED
1only utilize the half-wave of the alternating voltage of 6V to complete and light instruction; Battery discharge can not be given.
2, battery and switch sections: be made up of lead-acid battery and three position switch, its operating state has three kinds.(1) not throw light on chargeable state: now charging plug connects AC power, can charge, but can not puncture LED to lead-acid battery E
2.(2) low-light level illumination can not charged state: now charging plug connects AC power, can not charge, also would not puncture LED to lead-acid battery E
2.(3) highlight illumination can not charged state: now charging plug connects AC power, can not charge, can not puncture LED equally to lead-acid battery E
2.As long as lead-acid battery is to LED
2power supply, charging circuit will disconnect, and guarantee can not allow LED
2breakdown.
3, illuminating circuit part is by larger resistance R
3, less resistive R
4and high-brightness LED
2composition.Its operating state has two kinds.(1) low-light level illumination condition: now lead-acid battery E is by larger resistance R
3to high-brightness LED
2power supply, brightness is lower.(2) highlight illumination state: now lead-acid battery is by less resistive R
4to high-brightness LED
2power supply, brightness is higher.The utility model can be used for the transformation to existing LED flashlight circuit, utilizes the third gear switch K in circuit, the positive terminal that bridge rectifier exports is connected to the vacant point of third gear switch left end, circuit only just can be charged the battery when switch is beaten in left side.And now LED is open circuit, so just can LED be effectively protected not punctured by charging voltage.
Claims (2)
1. the device of a lead-acid battery flashlight charge protection LED; powered to lead-acid battery E after step-down, bridge rectifier by AC power; lead-acid battery E is connected LED2 through resistance R3 with resistance R4 respectively by a third gear switch; realize strong, weak illumination, it is characterized in that: the positive terminal that bridge rectifier exports is connected to the positive terminal of lead-acid battery E through switch.
2. the device of lead-acid battery flashlight charge protection LED according to claim 1; it is characterized in that: said switch is third gear switch K; the positive terminal that bridge rectifier exports is connected to the vacant point of third gear switch left end, circuit only just can be charged the battery when switch is beaten in left side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520206017.2U CN204465093U (en) | 2015-04-08 | 2015-04-08 | The device of lead-acid battery flashlight charge protection LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520206017.2U CN204465093U (en) | 2015-04-08 | 2015-04-08 | The device of lead-acid battery flashlight charge protection LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204465093U true CN204465093U (en) | 2015-07-08 |
Family
ID=53671920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520206017.2U Expired - Fee Related CN204465093U (en) | 2015-04-08 | 2015-04-08 | The device of lead-acid battery flashlight charge protection LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204465093U (en) |
-
2015
- 2015-04-08 CN CN201520206017.2U patent/CN204465093U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20150708 Termination date: 20160408 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |