CN206340993U - A kind of cell switch tube drive circuit - Google Patents
A kind of cell switch tube drive circuit Download PDFInfo
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- CN206340993U CN206340993U CN201621222439.XU CN201621222439U CN206340993U CN 206340993 U CN206340993 U CN 206340993U CN 201621222439 U CN201621222439 U CN 201621222439U CN 206340993 U CN206340993 U CN 206340993U
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- circuit
- triode
- drive circuit
- voltage
- switch
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Abstract
The utility model discloses a kind of cell switch tube drive circuit; between battery negative terminal and charger negative terminal; including high-speed electronic switch, mu balanced circuit, current-limiting protection circuit; isolated drive circuit; discharge drive circuit, and the high-speed electronic switch is by charge switch pipe, discharge switch pipe; voltage-stabiliser tube and triode composition, for realizing the fast conducting of circuit and disconnection between charger and battery；The isolated drive circuit accurately gives switching tube shutdown signal in voltage drift, realizes that circuit disconnects；The electric discharge drive circuit inputs the break-make that control signal drives high-speed electronic switch pole pipe by controller；The current-limiting protection circuit connects isolated drive circuit, is made up of multiple triodes and resistance, and divided current is carried out to circuit in overvoltage；The mu balanced circuit connects current-limiting protection circuit, is made up of voltage-stabiliser tube and resistance and realizes partial pressure.
Description
Technical field
The utility model is related to cell balancing field, more particularly to a kind of cell switch tube drive circuit.
Background technology
Due to lithium battery characteristic, the problems such as can not occurring overvoltage, under-voltage or excessively stream in use, so using lithium
, it is necessary to add protection circuit to protect battery during battery, it is to avoid battery is damaged.Control battery charge and discharge is used as using battery negative terminal
In electric line.When battery charges to overvoltage protection, charge switch pipe disconnects, if external charging machine also compares battery in the presence of one
When big voltage charges, because positive pole is connected, negative pole disconnects, and causes voltage-to-ground to drift about, disruptive discharge switching tube voltage-stabiliser tube grid
Pole and the voltage-stabiliser tube D67 of source electrode, cause electric current in circuit to increase, there is the risk for damaging component.
Because battery is connected with charger anode, negative terminal disconnects, and causes GND and charger negative pole to there is electrical potential difference,
Cause charge switch tube grid to battery terminal voltage occur abnormal, make the switching tube that should be closed be in turning on shape
State, influence circuit is normally run.
During lithium battery use, charged if there is battery over-pressed, under-voltage, the factor such as excessively stream can give battery and people
Harm is brought, so invention protection circuit is extremely urgent.When battery charges to overvoltage protection, the drift of battery voltage-to-ground is produced
There is voltage-stabiliser tube to puncture, if without current-limiting protection, component can be caused to damage because of excessively stream.And can be due to switching tube false judgment
Voltage makes switching tube turn on again, influences circuit normal work.
Utility model content
To overcome the defect of prior art, the utility model provides a kind of cell switch tube drive circuit, increased limit
When stream protection make it that overvoltage protection occurs in circuit, the normal operation of overcurrent damage circuit is effectively prevented；While isolated drive circuit
Use charger earth signal, it is ensured that switching tube can normally disconnect.
The utility model discloses a kind of cell switch tube drive circuit, installed in battery negative terminal and charger negative terminal it
Between, including high-speed electronic switch, mu balanced circuit, current-limiting protection circuit, isolated drive circuit, discharge drive circuit, wherein：
The high-speed electronic switch is by charge switch pipe, discharge switch pipe, voltage-stabiliser tube and triode composition, for realizing
The fast conducting of circuit and disconnection between charger and battery；
The isolated drive circuit is made up of optocoupler and triode, and its input connection controller, output end connection is quick
The base stage of electronic switching transistor, has controller to input control signal driving optocoupler control, accurate to switch in voltage drift
Pipe shutdown signal, realizes that circuit disconnects；
The electric discharge drive circuit is by FET, triode and resistance composition, its input connection controller, output
The base stage of end connection high-speed electronic switch triode, the logical of control signal driving high-speed electronic switch pole pipe is inputted by controller
It is disconnected；
The current-limiting protection circuit connects isolated drive circuit, is made up of multiple triodes and resistance, in overvoltage to electricity
Road carries out divided current；
The mu balanced circuit connects current-limiting protection circuit, is made up of voltage-stabiliser tube and resistance and realizes partial pressure.
Preferably, the high-speed electronic switch is by charge switch pipe Q15, discharge switch pipe Q33, voltage-stabiliser tube D46, D67,
NPN type triode Q37, Q56, PNP type triode Q57, Q58 composition, wherein voltage-stabiliser tube D46 is connected in parallel on charge switch pipe Q15 grid
Charge switch circuit is constituted between pole and source electrode, voltage-stabiliser tube D67 is connected in parallel between discharge switch pipe Q33 grid and source electrode and constituted
Discharge switching circuit, described triode Q37, Q56, Q57, Q58 constitute switch tube driving circuit.
Preferably, the isolated drive circuit is made up of optocoupler U5-A and resistance R217, R40, optocoupler U5-A inputs
Controller is connected, output end connection high-speed electronic switch triode Q37 and Q57 base stage are driven by controller input control signal
Dynamic optocoupler, switching tube shutdown signal is accurately given in voltage drift, realizes that circuit disconnects.
Preferably, the current-limiting protection circuit by PNP type triode Q49, Q71, Q66, Q62 and resistance R500, R226,
R250 is constituted, wherein triode Q49 base stages connecting triode Q71 colelctor electrodes, triode Q49 emitter stages connection resistance R500, and three
Pole pipe Q71 emitter stage connecting triode Q66 emitter stages, triode Q66 base stage connecting triode Q62 emitter stages, triode Q66 collection
Voltage-stabiliser tube in electrode connecting triode Q62 base stages, triode Q62 colelctor electrodes connection mu balanced circuit.
Compared with prior art, a kind of cell switch tube drive circuit of the present utility model, with following usefulness：Increase
Plus current-limiting protection when make it that overvoltage protection occurs in circuit, effectively prevent the normal operation of overcurrent damage circuit；Isolate simultaneously and drive
Dynamic circuit uses charger earth signal, it is ensured that switching tube can normally disconnect.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the cell switch tube drive circuit disclosed in the utility model.
Embodiment
Below in conjunction with accompanying drawing of the present utility model, the technical scheme progress to the utility model embodiment is clear, complete
Description.
Be as shown in Figure 1 a kind of cell switch tube drive circuit disclosed in the utility model, installed in battery negative terminal and
Between charger negative terminal, including high-speed electronic switch, mu balanced circuit, current-limiting protection circuit, isolated drive circuit, electric discharge driving electricity
Road, wherein：
The high-speed electronic switch is by charge switch pipe Q15, discharge switch pipe Q33, voltage-stabiliser tube D46, D67, the pole of NPN type three
Pipe Q37, Q56, PNP type triode Q57, Q58 and resistance composition, wherein voltage-stabiliser tube D46 be connected in parallel on charge switch pipe Q15 grids and
Charge switch circuit is constituted between source electrode, voltage-stabiliser tube D67, which is connected in parallel between discharge switch pipe Q33 grid and source electrode, constitutes electric discharge
On-off circuit, described triode Q37, Q56, Q57, Q58 constitute switch tube driving circuit.
The electric discharge drive circuit includes FET Q47, triode Q59, and resistance is constituted, wherein FET Q47
Grid connects controller as input, and drain connecting triode Q59 base stages, and triode Q59 colelctor electrodes connect three poles as output
Pipe Q56, Q58 base stage, controller input control signal drive the break-make of high-speed electronic switch pole pipe, in battery discharge to under-voltage
When, low level signal disconnects discharge switch pipe, forbids battery discharge.
The isolated drive circuit includes optocoupler U5-A and resistance R217, R40 are constituted, the connection control of optocoupler U5-A inputs
Device, output end connecting triode Q37 and Q57 base stage is accurate in voltage drift by controller input control signal driving optocoupler
Switching tube shutdown signal is really given, realizes that circuit disconnects.
The current-limiting protection circuit is made up of PNP type triode Q49, Q71, Q66, Q62 and resistance R500, R226, R250,
Wherein triode Q49 base stages connecting triode Q71 colelctor electrodes, triode Q49 emitter stages connection resistance R500, triode Q71 hair
Emitter-base bandgap grading connecting triode Q66 emitter stages, triode Q66 base stage connecting triode Q62 emitter stages, the connection of triode Q66 colelctor electrodes
Voltage-stabiliser tube D83 in triode Q62 base stages, triode Q62 colelctor electrodes connection mu balanced circuit.
The mu balanced circuit connects current-limiting protection circuit, by voltage-stabiliser tube D83, triode Q73 and resistance R221, R251 group
Into wherein resistance R221, R251 realizes partial pressure.
A kind of cell switch tube drive circuit disclosed in the utility model, its operation principle is：
When charging normal, controller output high level driving optocoupler and electric discharge drive circuit lead triode Q37, Q56
It is logical, so that charge switch pipe Q15 and discharge switch pipe Q33 closures, circuit normal work.
When there is over-charging of battery protection, controller output low level driving optocoupler U5-A, so that triode Q37 disconnects, fills
Electric switch pipe Q15 grids do not have control source, disconnect charge switch pipe, are connected due to charger or with battery, work as charging
When electromechanics pressure is higher than cell voltage, using battery positive as reference point, battery becomes big to discharge switch pipe end voltage, when voltage is more than
During the breakdown voltage of the voltage-stabiliser tube D67 between discharge switch tube grid and source electrode, when voltage-stabiliser tube can puncture, the voltage now inputted
Current limliting is carried out by R500, Q71 and R250 and Q66, circuit because excessively stream is effectively prevented and damages component.
When charging protection switch pipe disconnects, optocoupler U5-A has used the ground of charging generator terminal, voltage drift occurs even in battery
During shifting, controller can also give low level signal, disconnect charge switch pipe.
Technology contents and technical characteristic of the present utility model are had revealed that as above, but those of ordinary skill in the art still may be used
A variety of replacements and modification without departing substantially from the utility model spirit can be made based on announcement of the present utility model, therefore, this practicality is new
Type protection domain should be not limited to the content disclosed in embodiment, and should replace and repair without departing substantially from of the present utility model including various
Decorations, and covered by present patent application claim.
Claims (3)
1. a kind of cell switch tube drive circuit, between battery negative terminal and charger negative terminal, it is characterised in that：Including fast
Fast electronic switch, mu balanced circuit, current-limiting protection circuit, isolated drive circuit, discharge drive circuit, wherein：
The high-speed electronic switch is by charge switch pipe, discharge switch pipe, voltage-stabiliser tube and triode composition, for realizing charging
The fast conducting of circuit and disconnection between machine and battery；
The isolated drive circuit is made up of optocoupler and resistance, and its input connection controller, output end connection swift electron is opened
The base stage of triode is closed, it is accurate in voltage drift to be closed to switching tube by controller input control signal driving optocoupler control
Signal, realizes that circuit disconnects；
The electric discharge drive circuit is connected by FET, triode and resistance composition, its input connection controller, output end
The base stage of high-speed electronic switch triode is connect, the break-make that control signal drives high-speed electronic switch pole pipe is inputted by controller；
The current-limiting protection circuit connects isolated drive circuit, is made up of, circuit is entered multiple triodes and resistance in overvoltage
Row divided current；
The mu balanced circuit connects current-limiting protection circuit, is made up of voltage-stabiliser tube and resistance and realizes partial pressure.
2. a kind of cell switch tube drive circuit according to claim 1, it is characterised in that：The high-speed electronic switch by
Charge switch pipe Q15, discharge switch pipe Q33, voltage-stabiliser tube D46, D67, NPN type triode Q37, Q56, PNP type triode Q57,
Q58 is constituted, and wherein voltage-stabiliser tube D46 is connected in parallel between charge switch pipe Q15 grids and source electrode and constitutes charge switch circuit, voltage-stabiliser tube
D67, which is connected in parallel between discharge switch pipe Q33 grid and source electrode, constitutes discharge switching circuit, the triode Q37, Q56, Q57,
Q58 constitutes switch tube driving circuit.
3. a kind of cell switch tube drive circuit according to claim 1, it is characterised in that：The current-limiting protection circuit by
PNP type triode Q49, Q71, Q66, Q62 and resistance R500, R226, R250 composition, wherein triode Q49 base stages connect three poles
Pipe Q71 colelctor electrodes, triode Q49 emitter stages connection resistance R500, triode Q71 emitter stage connecting triode Q66 emitter stages, three
Pole pipe Q66 base stage connecting triode Q62 emitter stages, triode Q66 colelctor electrode connecting triode Q62 base stages, triode Q62 current collections
Voltage-stabiliser tube in pole connection mu balanced circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621222439.XU CN206340993U (en) | 2016-11-14 | 2016-11-14 | A kind of cell switch tube drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621222439.XU CN206340993U (en) | 2016-11-14 | 2016-11-14 | A kind of cell switch tube drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206340993U true CN206340993U (en) | 2017-07-18 |
Family
ID=59300459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621222439.XU Active CN206340993U (en) | 2016-11-14 | 2016-11-14 | A kind of cell switch tube drive circuit |
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|---|---|
| CN (1) | CN206340993U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112265473A (en) * | 2020-10-19 | 2021-01-26 | 珠海格力电器股份有限公司 | Driving device |
-
2016
- 2016-11-14 CN CN201621222439.XU patent/CN206340993U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112265473A (en) * | 2020-10-19 | 2021-01-26 | 珠海格力电器股份有限公司 | Driving device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 226100 No.888, Jiuhua Road, high tech Zone, Nantong City, Jiangsu Province Patentee after: Wotai Energy Co.,Ltd. Address before: 226000 East University Science Park, Nantong High-tech Zone, Jiangsu Province Patentee before: NEOVOLTAIC ENERGY NANTONG Co.,Ltd. |
|
| CP03 | Change of name, title or address |