CN106786399B - A kind of storage battery under-voltage automatically shuts down lock-in circuit - Google Patents
A kind of storage battery under-voltage automatically shuts down lock-in circuit Download PDFInfo
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- CN106786399B CN106786399B CN201611076372.8A CN201611076372A CN106786399B CN 106786399 B CN106786399 B CN 106786399B CN 201611076372 A CN201611076372 A CN 201611076372A CN 106786399 B CN106786399 B CN 106786399B
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- photoelectrical coupler
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a kind of storage battery under-voltages to automatically shut down lock-in circuit, including voltage detecting circuit, undervoltage turnoff state self-locking control circuit, major loop switch and driving circuit；Voltage detecting circuit includes first resistor R1, second resistance R2,3rd resistor R3, first diode V1, first capacitor C1, the second capacitor C2, the second diode V2；The undervoltage turnoff state self-locking control circuit includes photoelectrical coupler E1, photoelectrical coupler E2, the first triode Q1, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, third capacitor C3 and the 4th capacitor C4；Major loop switch includes the 9th resistance R9, third diode V3, the second triode Q2 and switching tube Q3 with driving circuit；The present invention uses pure electronic device, does not need to increase more driving circuits, and circuit reliability can be high, and shock resistance is strong, and when battery input undervoltage, storage battery power supply output is automatically closed in circuit, locks guard mode.
Description
Technical field
The invention belongs to technical field of circuit control, and in particular to a kind of storage battery under-voltage automatically shuts down lock-in circuit.
Background technique
Currently, user, which would generally forget to close after people leaves, to be used in using system of the battery as power supply
Electric equipment switch, prolonged power consumption will cause the damage of battery irrecoverability.
Previous battery under-voltage protection is using Hysteresis control, and the setting of under-voltage protection threshold values and return difference will affect battery
The stability of the primary input actuating of relay.
The previous common device for opening and closing storage battery power supply is relay, and the coil of relay and contact are machinery
Component is easy to produce malfunction under the occasions such as vehicle-mounted vibration.
Summary of the invention
Output can be automatically shut down in storage battery under-voltage the purpose of the present invention is to propose to one kind and lock off state
Protection circuit, particular by following technical scheme realize.
A kind of storage battery under-voltage automatically shuts down lock-in circuit, including voltage detecting circuit, undervoltage turnoff state are from lock control
Circuit, major loop switch and driving circuit；
The voltage detecting circuit includes first resistor R1, second resistance R2,3rd resistor R3, three ends are adjustable voltage-stabiliser tube
V1, first capacitor C1, the second capacitor C2, the second diode V2；
The undervoltage turnoff state self-locking control circuit includes photoelectrical coupler E1, photoelectrical coupler E2, the first triode
Q1, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the electricity of third capacitor C3 and the 4th
Hold C4；
The major loop switch includes the 9th resistance R9, third diode V3, the second triode Q2 with driving circuit and opens
Close pipe Q3；
The first resistor R1 and second resistance R2 are connected in series to the circuit, 3rd resistor R3 and the adjustable voltage-stabiliser tube V1's in three ends
The connection of 1 foot, 2 feet of three ends are adjustable voltage-stabiliser tube V1 are connected between concatenated first resistor R1 and second resistance R2, and the second electricity
It is parallel with first capacitor C1 on resistance R2, is parallel with the second capacitor C2 between 1 foot and 3 feet of three ends are adjustable voltage-stabiliser tube V1；Described
The cathode of two diode V2 is connected on the circuit of the second capacitor C2；
The first port of the photoelectrical coupler E1 is connected to the anode of the second diode V2, photoelectrical coupler E1's
Second port is connected to the first port of photoelectrical coupler E2, and the third port of photoelectrical coupler E1 is connected to the 4th resistance R4's
One end；
The third port of the photoelectrical coupler E2 is connected to one end of the 5th resistance R5；The other end of 5th resistance R5 and
The other end of 4th resistance R4 is connect with one end of the 8th resistance R8, and the 4th capacitor C4 is connected in parallel on the 8th resistance R8；
The 4th port of the photoelectrical coupler E1 connects one end of the 7th resistance R7, the other end connection of the 7th resistance R7
The base stage of first triode Q1, the collector of the first triode Q1 are connected to the 8th resistance R8, the emitter of the first triode Q1
It is connected on circuit；
The other end of 9th resistance R9 is connected with the cathode of voltage-stabiliser tube V3, and the 4th port of photoelectrical coupler E2 is connected to
On the circuit of 9th resistance R9, the cathode of third diode V3 connects 1 foot of the second triode Q2, and the anode of third diode V3 connects
The output end of 3 feet of second triode Q2, the second triode Q2 is connect with the input terminal for the switching tube Q3 being connected on circuit.
The fifth port of the photoelectrical coupler E1 and the fifth port of photoelectrical coupler E2 are grounded.
The another of third capacitor C3 is also connected on the 4th port of photoelectrical coupler E1 and the connection circuit of the 7th resistance R7
One end.
The 6th resistance R6 is parallel on third capacitor C3.
The cathode of the third diode V3 is connected to one end of the 9th resistance R9.
Advantageous effects of the invention:
(1), circuit uses pure electronic device, compares and there are the protection circuit of the mechanical switch such as relay, does not need
Increase more driving circuits, circuit reliability can be high, and shock resistance is strong, and small in size, low in energy consumption.
(2), it is total ground in chip all in circuit and switching tube use process, does not need additionally to increase auxiliary electricity
Source directly takes electric use from battery.
(3), when battery input undervoltage, storage battery power supply output is automatically closed in circuit, and locks guard mode.
Detailed description of the invention
Attached drawing 1 is the circuit diagram of invention.
Specific embodiment
Referring to Fig. 1, a kind of storage battery under-voltage automatically shuts down lock-in circuit, including voltage detecting circuit, undervoltage turnoff state
Self-locking control circuit, major loop switch and driving circuit；
The voltage detecting circuit includes first resistor R1, second resistance R2,3rd resistor R3, three ends are adjustable voltage-stabiliser tube
V1, first capacitor C1, the second capacitor C2, the second diode V2；
The undervoltage turnoff state self-locking control circuit includes photoelectrical coupler E1, photoelectrical coupler E2, the first triode
Q1, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the electricity of third capacitor C3 and the 4th
Hold C4；
The major loop switch includes the 9th resistance R9, third diode V3, the second triode Q2 with driving circuit and opens
Close pipe Q3；
The first resistor R1 and second resistance R2 are connected in series to the circuit, 3rd resistor R3 and the adjustable voltage-stabiliser tube V1's in three ends
The connection of 1 foot, 2 feet of three ends are adjustable voltage-stabiliser tube V1 are connected between concatenated first resistor R1 and second resistance R2, and the second electricity
It is parallel with first capacitor C1 on resistance R2, is parallel with the second capacitor C2 between 1 foot and 3 feet of three ends are adjustable voltage-stabiliser tube V1；Described
The cathode of two diode V2 is connected on the circuit of the second capacitor C2；
The first port of the photoelectrical coupler E1 is connected to the anode of the second diode V2, photoelectrical coupler E1's
Second port is connected to the first port of photoelectrical coupler E2, and the third port of photoelectrical coupler E1 is connected to the 4th resistance R4's
One end；
The third port of the photoelectrical coupler E2 is connected to one end of the 5th electricity R5；The other end of 5th resistance R5 and
The other end of four resistance R4 is connect with one end of the 8th resistance R8, and the 4th capacitor C4 is connected in parallel on the 8th resistance R8；
The 4th port of the photoelectrical coupler E1 connects one end of the 7th resistance R7, the other end connection of the 7th resistance R7
The base stage of first triode Q1, the collector of the first triode Q1 are connected to the 8th resistance R8, the emitter of the first triode Q1
It is connected on circuit；
The other end of 9th resistance R9 is connected with the cathode of voltage-stabiliser tube V3, and the 4th port of photoelectrical coupler E2 is connected to
On the circuit of 9th resistance R9, the cathode of third diode V3 connects 1 foot of the second triode Q2, and the anode of third diode V3 connects
The output end of 3 feet of second triode Q2, the second triode Q2 is connect with the input terminal for the switching tube Q3 being connected on circuit.
The fifth port of the photoelectrical coupler E1 and the fifth port of photoelectrical coupler E2 are grounded.
The another of third capacitor C3 is also connected on the 4th port of photoelectrical coupler E1 and the connection circuit of the 7th resistance R7
One end.
The 6th resistance R6 is parallel on third capacitor C3.
The cathode of the third diode V3 is connected to one end of the 9th resistance R9.
When the invention works:
(1) when battery voltage is normal, in accumulator voltage detecting circuit, setting R2 pressure drop is higher than DC2.5V, V1 pipe
It is on state, there are about 2V for capacitor C2 pressure drop, by the place of optocoupler E1 and E2 primary side series voltage stabilizing diode V2, E1 and E2
In not on-state.Resistance R9 and zener diode V3 branch provide stable driving voltage to MOSFET pipe Q2, and Q2 is persistently led
Logical, the pin 3 of switching tube Q3 is connected to ground, and Q3 can be connected, and battery output is normal.Capacitor C2 can be to avoid in battery voltage
When establishing, output is locked in power up.
(2) when battery voltage is under-voltage, R2 pressure drop is lower than DC2.5V in undervoltage detection circuit, and V1 pipe ends, then capacitor
C2 both end voltage increases, so that optocoupler E1 and E2 are connected.The conducting of E2 pair side directly by near short circuit between the grid of Q2 and source electrode,
The shutdown of Q2 pipe, and then battery output switching tube Q3 is also switched off, battery stops output power supply；Meanwhile after the conducting of E1 pair side,
Q1 base potential drags down, and Q1 conducting is applied to pressure drop on R8 on E1 by resistance R4, is held on E1 pair side and Q1, together
Sample is applied to voltage on resistance R8 on E2 using resistance R5, E2 pair side can be allowed to maintain on state, and then keep battery
The state of switching tube shutdown is exported, realizes the function of storage battery under-voltage shutdown locking.
After circuit output locking, need to cut off input side battery, it can be again after cell voltage is normal
It works on power.
Claims (5)
1. a kind of storage battery under-voltage automatically shuts down lock-in circuit, it is characterised in that: including voltage detecting circuit, undervoltage turnoff state
Self-locking control circuit, major loop switch and driving circuit；
The voltage detecting circuit includes first resistor R1, second resistance R2,3rd resistor R3, three ends are adjustable voltage-stabiliser tube V1,
One capacitor C1, the second capacitor C2, the second diode V2；
The undervoltage turnoff state self-locking control circuit includes photoelectrical coupler E1, photoelectrical coupler E2, the first triode Q1,
Four resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, third capacitor C3 and the 4th capacitor C4；
The major loop switch and driving circuit include the 9th resistance R9, third diode V3, the second triode Q2 and switching tube
Q3；
The first resistor R1 and second resistance R2 are connected in series to the circuit, 1 foot of 3rd resistor R3 and the adjustable voltage-stabiliser tube V1 in three ends
2 feet of connection, three ends are adjustable voltage-stabiliser tube V1 are connected between concatenated first resistor R1 and second resistance R2, and second resistance R2
On be parallel with first capacitor C1, be parallel with the second capacitor C2 between 1 foot and 3 feet of three ends are adjustable voltage-stabiliser tube V1；Described 2nd 2
The cathode of pole pipe V2 is connected on the circuit of the second capacitor C2；
The first port of the photoelectrical coupler E1 is connected to the anode of the second diode V2, and the second of photoelectrical coupler E1
Port is connected to the first port of photoelectrical coupler E2, and the third port of photoelectrical coupler E1 is connected to the one of the 4th resistance R4
End；
The third port of the photoelectrical coupler E2 is connected to one end of the 5th resistance R5；The other end and the 4th of 5th resistance R5
The other end of resistance R4 is connect with one end of the 8th resistance R8, and the 4th capacitor C4 is connected in parallel on the 8th resistance R8；
The 4th port of the photoelectrical coupler E1 connects one end of the 7th resistance R7, the other end connection first of the 7th resistance R7
The base stage of triode Q1, the collector of the first triode Q1 are connected to the 8th resistance R8, the emitter connection of the first triode Q1
On circuit；
The other end of 9th resistance R9 is connected with the cathode of voltage-stabiliser tube V3, and the 4th port of photoelectrical coupler E2 is connected to the 9th
On the circuit of resistance R9, the cathode of third diode V3 connects 1 foot of the second triode Q2, and the anode of third diode V3 connects second
The output end of 3 feet of triode Q2, the second triode Q2 is connect with the input terminal for the switching tube Q3 being connected on circuit.
2. a kind of storage battery under-voltage according to claim 1 automatically shuts down lock-in circuit, it is characterised in that: the photoelectricity coupling
The fifth port of clutch E1 and the fifth port of photoelectrical coupler E2 are grounded.
3. a kind of storage battery under-voltage according to claim 1 automatically shuts down lock-in circuit, it is characterised in that: photoelectrical coupler
Also the other end of third capacitor C3 is connected on the 4th port of E1 and the connection circuit of the 7th resistance R7.
4. a kind of storage battery under-voltage according to claim 1 or 3 automatically shuts down lock-in circuit, it is characterised in that: in third
The 6th resistance R6 is parallel on capacitor C3.
5. a kind of storage battery under-voltage according to claim 1 or 3 automatically shuts down lock-in circuit, it is characterised in that: described
The cathode of three diode V3 is connected to one end of the 9th resistance R9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611076372.8A CN106786399B (en) | 2016-11-30 | 2016-11-30 | A kind of storage battery under-voltage automatically shuts down lock-in circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611076372.8A CN106786399B (en) | 2016-11-30 | 2016-11-30 | A kind of storage battery under-voltage automatically shuts down lock-in circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106786399A CN106786399A (en) | 2017-05-31 |
| CN106786399B true CN106786399B (en) | 2018-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611076372.8A Active CN106786399B (en) | 2016-11-30 | 2016-11-30 | A kind of storage battery under-voltage automatically shuts down lock-in circuit |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3397031B2 (en) * | 1996-01-25 | 2003-04-14 | エフ・ディ−・ケイ株式会社 | Overdischarge prevention device |
| CN101814726B (en) * | 2010-04-14 | 2012-07-18 | 罗康林 | Battery discharge prevention circuit |
| CN203761032U (en) * | 2014-03-26 | 2014-08-06 | 重庆大学 | Lithium battery low-voltage self-locking circuit |
| CN204538671U (en) * | 2015-05-14 | 2015-08-05 | 哈尔滨冠拓电源设备有限公司 | A kind of electric automobile lithium battery hardware protection circuit |
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2016
- 2016-11-30 CN CN201611076372.8A patent/CN106786399B/en active Active
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| CN106786399A (en) | 2017-05-31 |
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