CN205377371U - Lead acid battery undervoltage protection automatic control circuit - Google Patents
Lead acid battery undervoltage protection automatic control circuit Download PDFInfo
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- CN205377371U CN205377371U CN201620049141.7U CN201620049141U CN205377371U CN 205377371 U CN205377371 U CN 205377371U CN 201620049141 U CN201620049141 U CN 201620049141U CN 205377371 U CN205377371 U CN 205377371U
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Abstract
The utility model discloses a lead acid battery undervoltage protection automatic control circuit, including button K, battery E, virtual earth generator T and triode V1, button K, relay J's contact J -1, resistance R3, triode V1's collecting electrode, MOS pipe Q1's drain electrode and error amplifier IC1's pin 8 are connected to virtual earth generator T's pin 1, and relay J's contact J -1's the other end and battery E's positive pole are connected to button K's the other end. The utility model discloses circuit structure is simple, components and parts are few, has used MOS pipe and virtual earth generator to combine together and has realized low voltage difference linear steady voltage function. It can accomplish to isolate the voltage that nearly ripple is very little from the current accumulator output voltage that the ripple is very big, and guarantees that fairly high output restraines the ability to the input ripple, and the circuit has the function of overdischarge automatic protection simultaneously, has consequently that the function is various, stable performance and an advantage with low costs.
Description
Technical field
This utility model relates to a kind of battery circuit, specifically a kind of lead-acid accumulator under-voltage protection automatic control circuit.
Background technology
In portable type electronic product, will using the multiple accumulator varied in size, therefore, power management chip is widely used in electronic product.Power management chip is of a great variety, such as step-down conversion circuit chip Buck, low pressure difference linear voltage regulator LDO, boost conversion circuit chip Boost, buck-boost type translation circuit chip Buck-Boost, Cook translation circuit chip etc..Wherein low pressure difference linear voltage regulator LDO, owing to power consumption is relatively low, therefore, is widely used in DC-DC power source managing chip.The LDO of prior art, most structure is complicated, voltage regulation performance is poor, and especially the situation to the input of accumulator low-voltage, affects the stability of output voltage due to the impact of ripple, and existing storage battery power supply circuit function is single, it is easy to cause service life reduction because of accumulator under-voltage.
Utility model content
The purpose of this utility model is in that to provide a kind of lead-acid accumulator under-voltage protection automatic control circuit, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, this utility model provides following technical scheme:
A kind of lead-acid accumulator under-voltage protection automatic control circuit, including button K, accumulator E, virtual earth generator T and audion V1；nullThe pin 1 of described virtual earth generator T connects button K、The contact J-1 of relay J、Resistance R3、The colelctor electrode of audion V1、The drain electrode of metal-oxide-semiconductor Q1 and the pin 8 of error amplifier IC1，The other end of button K connects the other end of the contact J-1 of relay J and the positive pole of accumulator E，The other end of resistance R3 connects the negative electrode of diode D1，The base stage of the anode connecting triode V1 of diode D1，The emitter stage of audion V1 connects relay J，The pin 2 of virtual earth generator T connects the pin 3 of error amplifier IC1，The pin 2 of error amplifier IC1 connects resistance R1 and resistance R2，The other end of resistance R2 connects electric capacity C1、Load RL、Relay J、The negative pole of accumulator E、The pin 3 of virtual earth generator T and the pin 4 also ground connection of chip IC 1，The pin 1 of error amplifier IC1 connects the grid of metal-oxide-semiconductor Q1，The other end of resistance R1 connects the other end of electric capacity C1、The other end of load RL and the source electrode of metal-oxide-semiconductor Q1，The model of described virtual earth generator T is TLE2425，The model of described error amplifier IC1 is LM321.
As preferred version of the present utility model: described relay J is normally opened contact relay.
As preferred version of the present utility model: described accumulator E is lead-acid accumulator.
Compared with prior art, the beneficial effects of the utility model are: this utility model circuit structure is simple, components and parts are few, employ metal-oxide-semiconductor and virtual earth generator combines and realizes low pressure difference linearity voltage stabilizing function.It can accomplish to isolate, from the accumulator output voltage that existing ripple is very big, the voltage that nearly ripple is only small; and ensure that at a relatively high output is to input Ripple Suppression ability; circuit has the function that overdischarge is protected automatically simultaneously, therefore has the advantage that diverse in function, stable performance and cost are low.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of lead-acid accumulator under-voltage protection automatic control circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.
Referring to Fig. 1, a kind of lead-acid accumulator under-voltage protection automatic control circuit, including button K, accumulator E, virtual earth generator T and audion V1；nullThe pin 1 of described virtual earth generator T connects button K、The contact J-1 of relay J、Resistance R3、The colelctor electrode of audion V1、The drain electrode of metal-oxide-semiconductor Q1 and the pin 8 of error amplifier IC1，The other end of button K connects the other end of the contact J-1 of relay J and the positive pole of accumulator E，The other end of resistance R3 connects the negative electrode of diode D1，The base stage of the anode connecting triode V1 of diode D1，The emitter stage of audion V1 connects relay J，The pin 2 of virtual earth generator T connects the pin 3 of error amplifier IC1，The pin 2 of error amplifier IC1 connects resistance R1 and resistance R2，The other end of resistance R2 connects electric capacity C1、Load RL、Relay J、The negative pole of accumulator E、The pin 3 of virtual earth generator T and the pin 4 also ground connection of chip IC 1，The pin 1 of error amplifier IC1 connects the grid of metal-oxide-semiconductor Q1，The other end of resistance R1 connects the other end of electric capacity C1、The other end of load RL and the source electrode of metal-oxide-semiconductor Q1，The model of described virtual earth generator T is TLE2425，The model of described error amplifier IC1 is LM321.
Relay J is normally opened contact relay.Accumulator E is lead-acid accumulator.
nullOperation principle of the present utility model is: the button K in circuit、Relay J、Diode D1 and audion V1 forms storage battery under-voltage automatic protection module，During use，Push button K，Under normal circumstances，The voltage of accumulator E is by breakdown diode D1 after resistance R3，The base stage making audion V1 obtains electric，Audion V1 turns on，Relay J adhesive，Circuit self-locking，Virtual earth generator TLE24125 in circuit provides 2.5V precision offset for error amplifier IC1，System powers up，Circuit starts to start，Constant-current source circuit provides biasing to whole circuit，IC1 a reference source voltage is quickly set up，The voltage exported to load RL constantly rises along with input voltage，When namely the voltage in output to load RL be up to setting (4.55V)，By resistance R1、The output feedack voltage obtained is delivered to 2 feet of IC2 by the feedback network of R2 composition，Now error amplifier IC2 is by output feedack voltage (2 foot voltages，Error small-signal 2.5V) and between reference voltage (3 foot) is amplified，It is adjusted then through metal-oxide-semiconductor Q1，Input signal < VT (raceway groove pinch-off voltage) when metal-oxide-semiconductor Q1 source electrode，Pinch off resistance between its drain electrode and source electrode will be continually changing，Thus forming negative feedback，Ensure that output voltage stabilization is on setting.The Main Function of electric capacity C1 is to filter alternating component, and therefore, if input voltage change or output curent change, this closed loop remains unchanged making the output voltage to load RL.Along with the work of accumulator E, its output voltage constantly reduces, when its voltage is lower than under-voltage marginal value; its undertension makes audion V1 turn on breakdown diode D1; therefore relay J dead electricity, its contact J-1 disconnects, and effectively protection accumulator E is from under-voltage damage.
Claims (3)
1. a lead-acid accumulator under-voltage protection automatic control circuit, including button K, accumulator E, virtual earth generator T and audion V1；nullIt is characterized in that，The pin 1 of described virtual earth generator T connects button K、The contact J-1 of relay J、Resistance R3、The colelctor electrode of audion V1、The drain electrode of metal-oxide-semiconductor Q1 and the pin 8 of error amplifier IC1，The other end of button K connects the other end of the contact J-1 of relay J and the positive pole of accumulator E，The other end of resistance R3 connects the negative electrode of diode D1，The base stage of the anode connecting triode V1 of diode D1，The emitter stage of audion V1 connects relay J，The pin 2 of virtual earth generator T connects the pin 3 of error amplifier IC1，The pin 2 of error amplifier IC1 connects resistance R1 and resistance R2，The other end of resistance R2 connects electric capacity C1、Load RL、Relay J、The negative pole of accumulator E、The pin 3 of virtual earth generator T and the pin 4 also ground connection of chip IC 1，The pin 1 of error amplifier IC1 connects the grid of metal-oxide-semiconductor Q1，The other end of resistance R1 connects the other end of electric capacity C1、The other end of load RL and the source electrode of metal-oxide-semiconductor Q1，The model of described virtual earth generator T is TLE2425，The model of described error amplifier IC1 is LM321.
2. a kind of lead-acid accumulator under-voltage protection automatic control circuit according to claim 1, it is characterised in that described relay J is normally opened contact relay.
3. a kind of lead-acid accumulator under-voltage protection automatic control circuit according to claim 1, it is characterised in that described accumulator E is lead-acid accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620049141.7U CN205377371U (en) | 2016-01-20 | 2016-01-20 | Lead acid battery undervoltage protection automatic control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620049141.7U CN205377371U (en) | 2016-01-20 | 2016-01-20 | Lead acid battery undervoltage protection automatic control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205377371U true CN205377371U (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620049141.7U Expired - Fee Related CN205377371U (en) | 2016-01-20 | 2016-01-20 | Lead acid battery undervoltage protection automatic control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205377371U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221913A (en) * | 2017-06-19 | 2017-09-29 | 江苏理工学院 | A kind of low-power dissipation protection circuit based on Ni-MH battery |
| CN109049020A (en) * | 2018-10-22 | 2018-12-21 | 浙江亚尚智能科技有限公司 | The control circuit of electric shaver |
| US11043723B2 (en) | 2016-11-24 | 2021-06-22 | R & WJ Enterprises Pty Ltd | Low voltage protector for systems battery |
-
2016
- 2016-01-20 CN CN201620049141.7U patent/CN205377371U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11043723B2 (en) | 2016-11-24 | 2021-06-22 | R & WJ Enterprises Pty Ltd | Low voltage protector for systems battery |
| CN107221913A (en) * | 2017-06-19 | 2017-09-29 | 江苏理工学院 | A kind of low-power dissipation protection circuit based on Ni-MH battery |
| CN109049020A (en) * | 2018-10-22 | 2018-12-21 | 浙江亚尚智能科技有限公司 | The control circuit of electric shaver |
| CN109049020B (en) * | 2018-10-22 | 2023-09-05 | 浙江亚尚智能科技有限公司 | Control circuit of electric shaver |
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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: 20160706 Termination date: 20190120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |