CN206807093U - A kind of battery pack protective circuit - Google Patents
A kind of battery pack protective circuit Download PDFInfo
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- CN206807093U CN206807093U CN201720701478.6U CN201720701478U CN206807093U CN 206807093 U CN206807093 U CN 206807093U CN 201720701478 U CN201720701478 U CN 201720701478U CN 206807093 U CN206807093 U CN 206807093U
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Abstract
The utility model discloses a kind of battery pack protective circuit.The utility model uses two field-effect transistors and voltage detecting and controling circuit; when battery pack, voltage sets magnitude of voltage higher than additives for overcharge protection in charging; or in electric discharge voltage less than over set magnitude of voltage when; turn off the second field-effect transistor; turn on the first field-effect transistor; by-path turn-on state is presented between the output end of battery pack; no longer to battery pack charge or discharge; now; because output end is conducting state, other battery packs in series battery continue charge or discharge；And field-effect transistor need not bear high voltage, therefore the utility model can realize the series connection application of multiple battery packs, and the design of battery pack can be with modularization, normalization with production, and battery pack is allowd to realize the series stack application as building block system, improve the scalability of battery pack application, additionally it is possible to greatly improve the security of battery system.
Description
Technical field
It the utility model is related to power management techniques, and in particular to a kind of battery pack protective circuit for the application that can connect.
Background technology
Commercially in existing battery management system, for multiple batteries battery pack in series, its overcharge is protected
Shield mode is protected in a manner of disconnecting charge circuit, and over mode is entered in a manner of disconnecting discharge loop
Row protection, this kind of battery pack be used alone when have no problem, can play a good protection, but this kind of battery pack without
Method is used in series, and the combination application of battery pack has certain limitation.The existing high-tension battery group of in the market, such as 240V
The communication standby electricity automobile-used Li-ion batteries piles of electric bus of HVDC battery group and more than 500V, although by battery pack mould
Block is formed, but battery module does not all have defencive function, and high-voltage DC contactor is only provided with total charging and discharging circuit
For protection control switch.
The guard method of existing battery management system, for additives for overcharge protection mode entered in a manner of disconnecting charge circuit
Row protection, over mode is protected in a manner of disconnecting discharge loop, and this causes battery pack not connect again
Use, because the total voltage that battery pack is used in series rear battery system is very high, such as 5 48V battery packs have been connected into 240V electricity
Pond group, and each 48V battery pack generally uses is that the pressure-resistant MOSFET of 80V are protection switch, and it is pressure-resistant more than 150V's
MOSFET is seldom and internal resistance can be very more greatly, and caloric value is very big during use, after 5 battery packs series connection are applied, if its
In a battery pack protection control action, 240V high pressure will be born in its MOSFET protection switch, more than 80V pressure voltages
Puncture the MOSFET, battery pack is lost protective effect completely.This causes the Li-ion batteries piles of high voltage applications, such as electronic
Automobile batteries group, electric bus battery pack, power energy storage battery pack etc., can only be in total series loop using high pressure resistant
D.C. contactor (i.e. relay for automobile) realize first class of protection, and can not realize for the only of each battery pack or battery module
Vertical protection, only plays monitoring to each battery pack or battery module, can not play a protective role.
Utility model content
For above problems of the prior art, the utility model proposes a kind of battery pack protection for application of connecting
Circuit, it is possible to achieve the protection of battery pack, in battery pack protection control action, the output end of battery pack is rendered as by-path turn-on
State, it is allowed to which electric current flows through, and the technology causes battery pack can be used alone, and multiple battery packs, which can also be connected, turns into high pressure
Battery pack uses, and after being used in series, each battery pack or battery module still have independent protective effect, have no effect on series connection
The input and output of other battery packs in loop, the security and extended application of battery pack can be greatly improved.
Battery pack protective circuit of the present utility model, battery pack can be used alone, and can be connected again with multiple battery packs
Used as high-voltage battery group.
Battery pack protective circuit of the present utility model, battery pack are used alone, and battery pack protective circuit includes：First and
Two field-effect transistors and voltage detecting and controling circuit；Wherein, voltage detecting and controling circuit has positive input terminal, negative input
End, the first control terminal and the second control terminal；The positive input terminal of voltage detecting and controling circuit and the positive pole of battery pack, the first field-effect
The drain electrode of transistor and output cathode are connected；The negative input end of voltage detecting and controling circuit and the negative pole of battery pack and second
The source electrode of field-effect transistor is connected；First control terminal of voltage detecting and controling circuit and the grid of the first field-effect transistor
It is connected；Second control terminal of voltage detecting and controling circuit is connected with the grid of the second field-effect transistor；First field-effect
The drain electrode of the source electrode of transistor and the second field-effect transistor is connected with output negative pole；Battery pack remains static, charged
State or discharge condition；Battery pack remains static, and output cathode and output negative pole are located at Light Condition；Battery pack, which is in, fills
Electricity condition, output cathode and the externally connected charger of output negative pole；Battery pack is in discharge condition, output cathode and output
Negative pole is connected to load.
Battery pack protective circuit of the present utility model, multiple battery pack series connection turn into high-voltage battery group and used, each
Battery pack connects a battery pack protective circuit；Each battery pack protective circuit includes：First and second field-effect transistors
And voltage detecting and controling circuit；Wherein, voltage detecting and controling circuit have positive input terminal, negative input end, the first control terminal and
Second control terminal；The positive input terminal of voltage detecting and controling circuit and the positive pole of battery pack, the first field-effect transistor drain electrode with
And output cathode is connected；The negative input end of voltage detecting and controling circuit and the negative pole of battery pack and the second field-effect transistor
Source electrode is connected；First control terminal of voltage detecting and controling circuit is connected with the grid of the first field-effect transistor；Voltage is examined
The second control terminal for surveying control circuit is connected with the grid of the second field-effect transistor；The source electrode of first field-effect transistor and
The drain electrode of second field-effect transistor is connected with output negative pole；The output cathode of two adjacent battery packs is connected with output negative pole
Connect, total output of the output cathode of first battery pack with the output negative pole of last battery pack respectively as series battery
Positive pole and total output negative pole；Battery pack remains static, charged state or discharge condition；Series battery is in static shape
State, total output cathode and total output negative pole are located at Light Condition；Series battery is in charged state, total output cathode and total defeated
Go out the externally connected charger of negative pole；Series battery is in discharge condition, and total output cathode and total output negative pole are connected to negative
Carry.
Further, the positive input terminal of voltage detecting and controling circuit and the positive pole of battery pack are in series with fuse, if first
With the second field effect transistor tube short circuit, then fuse blows, so as to be shielded to battery pack.
Field-effect transistor can use N-channel field-effect transistor, can also use P-channel field-effect transistor (PEFT) transistor.
In the case of equally pressure-resistant, the internal resistance of P-channel field-effect transistor (PEFT) transistor is bigger, and price is more expensive, therefore the utility model is adopted
With N-channel field-effect transistor.
Voltage detecting and controling circuit includes voltage detecting circuit, the battery undervoltage overvoltage decision circuitry and defeated being sequentially connected
Go out control circuit；Wherein, voltage detecting circuit is detected to cell voltage, and the battery voltage value that detection obtains is inputted to electricity
Pond is under-voltage, and over-pressed decision circuitry is compared and judged, will compare and is inputted with judged result to output control circuit, output control
Circuit is controlled according to voltage judged result to the first and second output ends；First and second inputs of voltage detecting circuit
As the positive input terminal and negative input end of voltage detecting and controling circuit, the first and second output ends of output control circuit are as electricity
The pressure detection control terminal of control circuit first and the second control terminal.
When battery pack remains static, in each battery pack protective circuit, the of voltage detecting and controling circuit
One control terminal exports low level so that the first field-effect transistor is off state, while the of voltage detecting and controling circuit
Two control terminals export high level so that the second field-effect transistor is in the conduction state.
When battery pack is in charged state, each voltage detecting and controling circuit detects battery pack protective circuit where it
Battery pack voltage：
A. if when the voltage of battery pack sets voltage less than additives for overcharge protection, the first control of voltage detecting and controling circuit
End output low level so that the first field-effect transistor is off state, while the second control of voltage detecting and controling circuit
End output high level so that the second field-effect transistor is in the conduction state, and battery pack charges normal；
B. if when the voltage of battery pack sets voltage higher than additives for overcharge protection, voltage detecting and controling circuit is first by the second control
End processed exports low level, turns off the second field-effect transistor, then the first output end is exported into high level so that the first field-effect is brilliant
Body pipe turns on, and by-path turn-on state is at this moment presented between the output cathode and output negative pole of this battery pack, and charging current is from first
Field-effect transistor is flowed through, and no longer battery pack is charged；Now, due to being conducting state between output cathode and output negative pole,
If battery is connected in multiple battery packs, charger continues to charge to other battery packs in series battery；Saved for N
Li-ion batteries piles in series, its additives for overcharge protection set voltage between N × 3.6~N × 4.4；
C. when external charger is removed or the voltage of battery pack recovers voltage less than additives for overcharge protection, voltage detecting control
First control terminal is first exported low level by circuit so that and the first field-effect transistor is off state, then by the second control terminal
Export high level so that the second field-effect transistor is in the conduction state, and at this moment battery pack recovers normal charging condition, overcharge
Protection recovers voltage between N × 3.6~N × 4.4, but additives for overcharge protection recovers voltage and is less than additives for overcharge protection setting voltage.
When battery pack is in discharge condition, each voltage detecting and controling circuit detects battery pack protective circuit where it
Battery pack voltage：
A. if when the voltage of battery pack sets voltage higher than over, the first control of voltage detecting and controling circuit
End output low level so that the first field-effect transistor is off state, while the second control of voltage detecting and controling circuit
End output high level so that the second field-effect transistor is in the conduction state, battery pack regular picture；
B. if when the voltage of battery pack sets voltage less than over, voltage detecting and controling circuit is first by the second control
End processed exports low level, turns off the second field-effect transistor, then the first output end is exported into high level so that the first field-effect is brilliant
Body pipe turns on, and by-path turn-on state is at this moment presented between the output cathode and output negative pole of this battery pack, and discharge current is from first
Field-effect transistor flows through, no longer to load discharge；Now, due to being conducting state between output cathode and output negative pole, such as
Fruit battery is connected in multiple battery packs, and other battery packs in series battery continue to load discharge, over
Voltage is set between N × 2.0~N × 3.0；
C. when the load of outside is removed or the voltage of battery pack recovers voltage higher than over, voltage detecting control
First control terminal is first exported low level by circuit so that and the first field-effect transistor is off state, then by the second control terminal
Export high level so that the second field-effect transistor is in the conduction state, and at this moment battery pack recovers regular picture state, overdischarge
Return voltage is protected between N × 2.0~N × 3.0, but over return voltage is more than over and sets voltage, N
For >=2 natural number.
The advantages of the utility model：
The utility model uses two field-effect transistors and voltage detecting and controling circuit, when battery pack voltage in charging
Higher than additives for overcharge protection set voltage, or in discharge process voltage less than over set voltage when, voltage detecting
Control circuit turns off the second field-effect transistor, turns on the first field-effect transistor, bypass is presented between the output end of battery pack
Conducting state, no longer to battery pack charge or discharge, now, and because output end is conducting state, other in series battery
Battery pack continues charge or discharge；And only need to bear battery pack in itself to the field-effect transistor of battery pack protection control
Voltage, it is not necessary to bear high voltage, therefore the utility model can realize the series connection application of multiple battery packs, and battery system
Each battery pack in system has independent defencive function, and the design and production for making battery pack can be with modularization, normalization, and make
Battery pack can realize series stack application as building block system, the scalability of battery pack application is improved, due to each electricity
Pond group has independent protection control, additionally it is possible to greatly improves the security of battery system.
Brief description of the drawings
Fig. 1 is the circuit diagram of one embodiment of a battery pack protective circuit of the present utility model；
Fig. 2 is the structural frames of voltage detecting and controling circuit one embodiment of battery pack protective circuit of the present utility model
Figure；
Fig. 3 is the circuit diagram of one embodiment of the battery pack protective circuit of multiple battery pack series connection of the present utility model.
Embodiment
Below in conjunction with the accompanying drawings, by specific embodiment, the utility model is expanded on further.
Embodiment one
In the present embodiment, battery pack is used alone.
As shown in figure 1, the battery pack protective circuit of the present embodiment includes：First and second N-channel field-effect transistor N-
MOSFET1 and N-MOSFET2 and voltage detecting and controling circuit；Wherein, voltage detecting and controling circuit have positive input terminal IN+,
Negative input end IN-, the first control terminal CTRL1 and the second control terminal CTRL2；The positive input terminal IN+ of voltage detecting and controling circuit with
It is in series with drain electrode and the output cathode of the positive pole, the first N-channel field-effect transistor N-MOSFET1 of fuse F1 battery pack
OUT+ is connected；The negative input end IN- of voltage detecting and controling circuit and the negative pole of battery pack and the second N-channel field-effect transistor
N-MOSFET2 source electrode is connected；The the first control terminal CTRL1 and the first N-channel field effect transistor of voltage detecting and controling circuit
Pipe N-MOSFET1 grid is connected；Second control terminal CTRL2 of voltage detecting and controling circuit and the second N-channel field-effect are brilliant
Body pipe N-MOSFET2 grid is connected；First N-channel field-effect transistor N-MOSFET1 source electrode and the second N-channel field
Effect transistor N-MOSFET2 drain electrode is connected with output negative pole OUT-.
Battery pack remains static, charged state or discharge condition；When battery pack remains static, output cathode
OUT+ and output negative pole OUT- is located at Light Condition, when battery pack is in charged state, output cathode OUT+ and output negative pole
Charger externally connected OUT-, when battery pack is in discharge condition, output cathode OUT+ and output negative pole OUT- are connected to negative
Carry.
As shown in Fig. 2 voltage detecting and controling circuit be sequentially connected voltage detecting circuit, battery undervoltage overvoltage decision circuitry
And output control circuit；Wherein, voltage detecting circuit detects to cell voltage, and the battery voltage value that detection is obtained is defeated
Enter to battery undervoltage overvoltage decision circuitry and be compared and judge, will compare and inputted with judged result to output control circuit, it is defeated
Go out control circuit to be controlled the first and second output ends according to voltage judged result；The first and second of voltage detecting circuit
Positive input terminal IN+s and negative input end IN- of the input IN1 and IN2 as voltage detecting and controling circuit, the of output control circuit
One and second output end OUT1 and OUT2 as voltage detecting and controling circuit the first control terminal CTRL1 and the second control terminal CTRL2.
Embodiment two
In the present embodiment, 10 battery packs are used in series.
As shown in figure 3, in the present embodiment, 10 battery pack series connection, the output cathode of two adjacent battery packs and output are negative
Pole is connected, and the output cathode of first battery pack is with the output negative pole of last battery pack respectively as series battery
Total output cathode and total output negative pole；Each battery pack connects a battery pack protective circuit, a battery pack protective circuit
With embodiment one.
In the present embodiment, it is 42.8V that additives for overcharge protection, which sets voltage,；It is 28V that over, which sets voltage,；Overcharge
It is 41V that protection, which recovers voltage,；It is 32V that over, which recovers voltage,.
When series battery remains static, total output cathode and total output negative pole are located at Light Condition, work as series electrical
Pond group is in charged state, total output cathode and the externally connected charger of total output negative pole, is put when series battery is in
Electricity condition, total output cathode and total output negative pole are connected to load.
When battery pack remains static, total output cathode and total output negative pole are located at Light Condition, voltage detecting control
The first control terminal output low level of circuit processed so that the first field-effect transistor is off state, while voltage detecting control
The second control terminal output high level of circuit processed so that the second field-effect transistor is in the conduction state.
When battery pack is in charged state, total output cathode and the externally connected charger of total output negative pole are each
The voltage of the battery pack of battery pack protective circuit where individual voltage detecting and controling circuit detects it：
A. if when the voltage of battery pack sets voltage less than additives for overcharge protection, the first control of voltage detecting and controling circuit
End output low level so that the first field-effect transistor is off state, while the second control of voltage detecting and controling circuit
End output high level so that the second field-effect transistor is in the conduction state, and battery pack charges normal；
B. if when the voltage of battery pack sets voltage higher than additives for overcharge protection, voltage detecting and controling circuit is first by the second control
End processed exports low level, turns off the second field-effect transistor, then the first output end is exported into high level so that the first field-effect is brilliant
Body pipe turns on, and by-path turn-on state is at this moment presented between the output cathode and output negative pole of this battery pack, and charging current is from first
Field-effect transistor is flowed through, and no longer battery pack is charged；Now, because output end is conducting state, charger is to series-connected cell
Other battery packs in group continue to charge；
C. when external charger is removed or the voltage of battery pack recovers voltage less than additives for overcharge protection, voltage detecting control
First control terminal is first exported low level by circuit so that and the first field-effect transistor is off state, then by the second control terminal
Export high level so that the second field-effect transistor is in the conduction state, and at this moment battery pack recovers normal charging condition.
When battery pack is in discharge condition, total output cathode and the externally connected load of total output negative pole, each
The voltage of the battery pack of battery pack protective circuit where voltage detecting and controling circuit detects it：
A. if when the voltage of battery pack sets voltage higher than over, the first control of voltage detecting and controling circuit
End output low level so that the first field-effect transistor is off state, while the second control of voltage detecting and controling circuit
End output high level so that the second field-effect transistor is in the conduction state, battery pack regular picture；
B. if when the voltage of battery pack sets voltage less than over, voltage detecting and controling circuit is first by the second control
End processed exports low level, turns off the second field-effect transistor, then the first output end is exported into high level so that the first field-effect is brilliant
Body pipe turns on, and by-path turn-on state is at this moment presented between the output cathode and output negative pole of this battery pack, and discharge current is from first
Field-effect transistor flows through, no longer to load discharge；Now, because output end is conducting state, other in series battery
Battery pack continue to load discharge；
C. when the load of outside is removed or the voltage of battery pack recovers voltage higher than over, voltage detecting control
First control terminal is first exported low level by circuit so that and the first field-effect transistor is off state, then by the second control terminal
Export high level so that the second field-effect transistor is in the conduction state, and at this moment battery pack recovers regular picture state.
It is finally noted that the purpose for publicizing and implementing example is that help further understands the utility model, but originally
The technical staff in field is appreciated that：Do not departing from the utility model and appended spirit and scope by the claims, it is various
Substitutions and modifications are all possible.Therefore, the utility model should not be limited to embodiment disclosure of that, and the utility model will
The scope of protection is asked to be defined by the scope that claims define.
Claims (10)
1. a kind of battery pack protective circuit, it is characterised in that battery pack is used alone, and the battery pack protective circuit includes：The
One and second field-effect transistor and voltage detecting and controling circuit；Wherein, voltage detecting and controling circuit has positive input terminal, born
Input, the first control terminal and the second control terminal；The positive input terminal of voltage detecting and controling circuit and the positive pole of battery pack, first
The drain electrode of effect transistor and output cathode are connected；The negative input end of voltage detecting and controling circuit and the negative pole of battery pack and
The source electrode of second field-effect transistor is connected；First control terminal of voltage detecting and controling circuit and the first field-effect transistor
Grid is connected；Second control terminal of voltage detecting and controling circuit is connected with the grid of the second field-effect transistor；First
The drain electrode of the source electrode of effect transistor and the second field-effect transistor is connected with output negative pole；Battery pack remains static,
Charged state or discharge condition；Battery pack remains static, and output cathode and output negative pole are located at Light Condition；At battery pack
In charged state, output cathode and the externally connected charger of output negative pole；Battery pack is in discharge condition, output cathode and
Output negative pole is connected to load.
2. battery pack protective circuit as claimed in claim 1, it is characterised in that the positive input of the voltage detecting and controling circuit
End and the positive pole of battery pack are in series with fuse.
3. battery pack protective circuit as claimed in claim 1, it is characterised in that first and second field-effect transistor is adopted
With N-channel field-effect transistor.
4. battery pack protective circuit as claimed in claim 1, it is characterised in that the voltage detecting and controling circuit is included successively
Voltage detecting circuit, battery undervoltage overvoltage decision circuitry and the output control circuit of connection；Wherein, the voltage detecting circuit
Cell voltage is detected, will detect obtained battery voltage value input to battery undervoltage overvoltage decision circuitry be compared and
Judge, will compare and inputted with judged result to output control circuit, output control circuit is according to voltage judged result to the first He
Second output end is controlled；First and second inputs of the voltage detecting circuit as voltage detecting and controling circuit just
Input and negative input end, the first and second output ends of output control circuit are as the control terminal of voltage detecting and controling circuit first
With the second control terminal.
A kind of 5. battery pack protective circuit, it is characterised in that multiple battery pack series connection turn into high-voltage battery group and used, each
Battery pack connects a battery pack protective circuit；Each battery pack protective circuit includes：First and second field-effect transistors
And voltage detecting and controling circuit；Wherein, voltage detecting and controling circuit have positive input terminal, negative input end, the first control terminal and
Second control terminal；The positive input terminal of voltage detecting and controling circuit and the positive pole of battery pack, the first field-effect transistor drain electrode with
And output cathode is connected；The negative input end of voltage detecting and controling circuit and the negative pole of battery pack and the second field-effect transistor
Source electrode is connected；First control terminal of voltage detecting and controling circuit is connected with the grid of the first field-effect transistor；Voltage is examined
The second control terminal for surveying control circuit is connected with the grid of the second field-effect transistor；The source electrode of first field-effect transistor and
The drain electrode of second field-effect transistor is connected with output negative pole；The output cathode of two adjacent battery packs is connected with output negative pole
Connect, total output of the output cathode of first battery pack with the output negative pole of last battery pack respectively as series battery
Positive pole and total output negative pole；Battery pack remains static, charged state or discharge condition；Series battery is in static shape
State, total output cathode and total output negative pole are located at Light Condition；Series battery is in charged state, total output cathode and total defeated
Go out the externally connected charger of negative pole；Series battery is in discharge condition, and total output cathode and total output negative pole are connected to negative
Carry.
6. battery pack protective circuit as claimed in claim 5, it is characterised in that the positive input of the voltage detecting and controling circuit
End and the positive pole of battery pack are in series with fuse.
7. battery pack protective circuit as claimed in claim 5, it is characterised in that first and second field-effect transistor is adopted
With N-channel field-effect transistor.
8. battery pack protective circuit as claimed in claim 5, it is characterised in that the voltage detecting and controling circuit is included successively
Voltage detecting circuit, battery undervoltage overvoltage decision circuitry and the output control circuit of connection；Wherein, the voltage detecting circuit
Cell voltage is detected, will detect obtained battery voltage value input to battery undervoltage overvoltage decision circuitry be compared and
Judge, will compare and inputted with judged result to output control circuit, output control circuit is according to voltage judged result to the first He
Second output end is controlled；First and second inputs of the voltage detecting circuit as voltage detecting and controling circuit just
Input and negative input end, the first and second output ends of output control circuit are as the control terminal of voltage detecting and controling circuit first
With the second control terminal.
9. battery pack protective circuit as claimed in claim 5, it is characterised in that when battery pack is in charged state, if
When the voltage of battery pack sets voltage higher than additives for overcharge protection, the second control terminal is first exported low electricity by voltage detecting and controling circuit
It is flat, the second field-effect transistor is turned off, then the first output end is exported into high level so that and the first field-effect transistor turns on, this
When this battery pack output cathode and output negative pole between by-path turn-on state is presented, charging current is from the first field-effect transistor
Flow through, no longer battery pack is charged；Now, due to being conducting state between output cathode and output negative pole, charger is to series connection
Other battery packs in battery pack continue to charge；Li-ion batteries piles in series are saved for N, its additives for overcharge protection is set
Voltage is between N × 3.6~N × 4.4；When external charger remove or the voltage of battery pack less than additives for overcharge protection recover voltage
When, the first control terminal is first exported low level by voltage detecting and controling circuit so that and the first field-effect transistor is off state,
The second control terminal is exported into high level again so that the second field-effect transistor is in the conduction state, and at this moment battery pack recovers normal
Charged state, additives for overcharge protection recover voltage between N × 3.6~N × 4.4, but additives for overcharge protection recover voltage be less than overcharge
Electric protection sets voltage, and N is >=2 natural number.
10. battery pack protective circuit as claimed in claim 5, it is characterised in that when battery pack is in discharge condition, if
When the voltage of battery pack sets voltage less than over, the second control terminal is first exported low electricity by voltage detecting and controling circuit
It is flat, the second field-effect transistor is turned off, then the first output end is exported into high level so that and the first field-effect transistor turns on, this
When this battery pack output cathode and output negative pole between by-path turn-on state is presented, discharge current is from the first field-effect transistor
Flow through, no longer to load discharge；Now, due to being conducting state between output cathode and output negative pole, in series battery
Other battery packs continue to load discharge, and over sets voltage between N × 2.0~N × 3.0；When bearing for outside
When load is removed or the voltage of battery pack recovers voltage higher than over, voltage detecting and controling circuit is first defeated by the first control terminal
Go out low level so that the first field-effect transistor is off state, then the second control terminal is exported into high level so that second
Effect transistor is in the conduction state, and at this moment battery pack recovers regular picture state, and over return voltage is in N × 2.0
Between~N × 3.0, but over return voltage is more than over and sets voltage, and N is >=2 natural number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720701478.6U CN206807093U (en) | 2017-06-16 | 2017-06-16 | A kind of battery pack protective circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720701478.6U CN206807093U (en) | 2017-06-16 | 2017-06-16 | A kind of battery pack protective circuit |
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| Publication Number | Publication Date |
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| CN206807093U true CN206807093U (en) | 2017-12-26 |
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| CN201720701478.6U Active CN206807093U (en) | 2017-06-16 | 2017-06-16 | A kind of battery pack protective circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321909A (en) * | 2018-04-04 | 2018-07-24 | 中国科学院上海高等研究院 | Intelligent battery administrative unit, the over-pressed self recoverable system of battery charging and self-recovery method |
| CN108448679A (en) * | 2018-04-04 | 2018-08-24 | 中国科学院上海高等研究院 | Intelligent battery administrative unit, battery discharge overcurrent self recoverable system and self-recovery method |
-
2017
- 2017-06-16 CN CN201720701478.6U patent/CN206807093U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321909A (en) * | 2018-04-04 | 2018-07-24 | 中国科学院上海高等研究院 | Intelligent battery administrative unit, the over-pressed self recoverable system of battery charging and self-recovery method |
| CN108448679A (en) * | 2018-04-04 | 2018-08-24 | 中国科学院上海高等研究院 | Intelligent battery administrative unit, battery discharge overcurrent self recoverable system and self-recovery method |
| CN108448679B (en) * | 2018-04-04 | 2020-09-04 | 中国科学院上海高等研究院 | Intelligent battery management unit, battery discharging overcurrent self-recovery system and self-recovery method |
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