CN107039951A - Battery protecting circuit and lithium battery - Google Patents
Battery protecting circuit and lithium battery Download PDFInfo
- Publication number
- CN107039951A CN107039951A CN201710158955.3A CN201710158955A CN107039951A CN 107039951 A CN107039951 A CN 107039951A CN 201710158955 A CN201710158955 A CN 201710158955A CN 107039951 A CN107039951 A CN 107039951A
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- CN
- China
- Prior art keywords
- circuit
- battery
- voltage
- overdischarge
- battery protecting
- 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.)
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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
Abstract
This application provides a kind of battery protecting circuit and lithium battery, including：Overdischarge voltage detecting circuit, overdischarge current detection circuit, control circuit, excessively stream restoring circuit and electrification reset circuit; detecting during electrification reset, the VCC voltages to battery protecting circuit rise to predeterminated voltage, the validity of the output signal of the electrification reset circuit changes；When the output signal of electrification reset circuit is the first validity, battery protecting circuit is forced to overdischarge voltage protection state, and when the output signal of electrification reset circuit is the second validity, it is overdischarge voltage protection state no longer to force battery protecting circuit.Present application addresses the problem of being locked in electric discharge overcurrent protection state is electrocuted on battery protection chip bringing onto load in the prior art.
Description
Technical field
The application is related to power-supply battery technical field, more particularly to a kind of battery protecting circuit and lithium battery.
Background technology
Fig. 1 shows the structural representation of lithium battery in the prior art, as illustrated, lithium battery is generally by battery core and battery
Protection circuit is constituted, and battery protecting circuit includes battery protection chip (IC) and two power MOS (Metal Oxide Semiconductor) devices (MD and MC).Each electricity
Pond protection chip includes overcharge voltage detection circuit, overdischarge voltage detecting circuit, overcharge current detection circuit, overdischarge
When there is not abnormality after current detection circuit, excessively stream restoring circuit and control circuit, lithium battery connection load or charger,
Two power MOS pipe conductings, lithium batteries are normally carried out discharge and recharge, and power MOS conductings have conducting resistance, so as BP+ and BP-
Between exist load when discharge current pressure drop can be formed on metal-oxide-semiconductor, discharge current is bigger, and the voltage drop on metal-oxide-semiconductor is bigger, i.e.,
Node VM is bigger relative to node VSS voltage difference.Overdischarge current detection circuit is examined by detecting voltages of the VM higher than VSS
Survey whether there is electric discharge overcurrent condition, when detect discharge current it is excessive when, chip can enter electric discharge overcurrent protection state
(EDI), control circuit closes power tube MD to forbid electric discharge.
Under electric discharge overcurrent protection state, in order that battery can return to regular picture state when load lightens,
There is an excessively stream restoring circuit in protection circuit.Because when in electric discharge overcurrent protection state, power tube MD is turned off,
The voltage of BP- nodes can be supported the voltage drawn high close to BP+, and the voltage of corresponding protection chip VM nodes similarly can be very
It is high.If not having excessively stream restoring circuit, even if load lightens, VM nodes remain at very high voltage, overdischarge current detecting
Circuit can still judge to be currently at electric discharge over-current state, make whole system deadlock in electric discharge overcurrent protection state, it is impossible to recover.
So needing to introduce excessively stream restoring circuit, its operation principle is：After electric discharge overcurrent protection state is entered, it can open and be arrived in VM
Drop-down path between VSS, it is intended to drag down VM, if now load it is still larger, VM voltages still can be more than electric discharge excessively stream
Rotection thresholds, once load lightens, VM can be pulled down to less than electric discharge overcurrent protection threshold value, and such system can just be reentered
Regular picture state.
In some specific system applications, battery protection chip and power MOS pipe are not placed in battery core, and are placed on system
On application circuit board, when battery core so being installed, electricity on system circuit board, battery protection chip is equivalent in the case of loaded
Upper electricity, it is possible to which electricity is put into electric discharge overcurrent protection state in appearance, and due to there is load to connect always, in battery protection chip
The pull-down capability of excessively stream restoring circuit is weaker, even if load is not very big, VM nodes can not be pulled down to electric discharge overcurrent protection
, can only be by adding charger activation system so that chip lock is in electric discharge overcurrent protection state, it is impossible to regular picture below threshold value.
Prior art deficiency is：
When battery protection chip and power MOS pipe are placed on system application circuit board, on battery protection chip bringing onto load
Electrocute and be locked in electric discharge overcurrent protection state.
The content of the invention
The embodiment of the present application proposes a kind of battery protecting circuit and lithium battery, to solve battery protection core in the prior art
The technical problem for being locked in electric discharge overcurrent protection state is electrocuted on piece bringing onto load.
One side, the embodiment of the present application provides a kind of battery protecting circuit, including：Overdischarge voltage detecting electricity
Road, overdischarge current detection circuit, control circuit, excessively stream restoring circuit and electrification reset circuit, wherein, the overdischarge voltage
Detection circuit, overdischarge current detection circuit are connected with the control circuit, the overdischarge voltage detecting circuit and described
Electrification reset circuit is connected and is connected to the first feeder ear VCC, and the overdischarge current detection circuit and the excessively stream recover electricity
Road is connected and is connected to voltage detecting end VM,
When detecting electrification reset, the electrification reset circuit exports useful signal, and the useful signal is used to force institute
State battery protecting circuit and be in overdischarge voltage protection state；
When the voltage for detecting the first feeder ear VCC reaches default first voltage value, the electrification reset circuit exports nothing
Imitate signal.
Second aspect, the embodiment of the present application provides a kind of lithium battery, including above-mentioned battery protecting circuit and battery core,
The first end of the battery core is connected with the first feeder ear VCC of the battery protecting circuit, the second end and the battery protection are electric
The second feeder ear VSS on road is connected, the first power MOS pipe MD for being connected with the first output end of the control circuit, with it is described
The second connected power MOS pipe MC of second output end of control circuit connects and is connected to the second end of the battery core.
Have the beneficial effect that：
Battery protecting circuit and lithium battery that the embodiment of the present application is provided, by increasing electrification reset circuit, work as electricity
On pond protection chip during electricity, force chip to return to regular picture state from overdischarge voltage protection state, prevent on bringing onto load
Electrocute the problem of being locked in electric discharge overcurrent protection state.
Brief description of the drawings
The specific embodiment of the application is described below with reference to accompanying drawings, wherein：
Fig. 1 shows the structural representation of lithium battery in the prior art；
Fig. 2 shows the structural representation of battery protecting circuit in the embodiment of the present application；
Fig. 3 shows the structural representation of lithium battery in the embodiment of the present application.
Embodiment
In order that the technical scheme and advantage of the application are more clearly understood, below in conjunction with accompanying drawing to the exemplary of the application
Embodiment is described in more detail, it is clear that described embodiment is only a part of embodiment of the application, rather than
The exhaustion of all embodiments.And in the case where not conflicting, the feature in embodiment and embodiment in this explanation can be mutual
It is combined.
In view of the shortcomings of the prior art, the embodiment of the present application proposes a kind of battery protecting circuit and lithium battery, enters below
Row explanation.
Fig. 2 shows the structural representation of battery protecting circuit in the embodiment of the present application, as illustrated, the battery protection
Circuit, it is characterised in that including：Overdischarge voltage detecting circuit, overdischarge current detection circuit, control circuit, excessively stream are recovered
Circuit and electrification reset circuit, wherein, the overdischarge voltage detecting circuit, overdischarge current detection circuit with the control
Circuit is connected, and the overdischarge voltage detecting circuit is connected with the electrification reset circuit and is connected to the first feeder ear VCC, institute
Overdischarge current detection circuit is stated with the excessively stream restoring circuit to be connected and be connected to voltage detecting end VM, wherein,
When detecting electrification reset, the electrification reset circuit exports useful signal, and the useful signal is used to force institute
State battery protecting circuit and be in overdischarge voltage protection state；
When the voltage for detecting the first feeder ear VCC reaches default first voltage value, the electrification reset circuit exports nothing
Imitate signal.
When it is implemented, it can be low level that the useful signal, which can be high level, the invalid signals,；Or, institute
It can be that low level, the invalid signals can be high level to state useful signal.
When the electrification reset circuit exports invalid signals, the electrification reset circuit no longer forces the battery protection
Circuit is in overdischarge voltage protection state.
In the specific implementation, it is generally the case that although now electrification reset circuit no longer forces the battery protecting circuit
In overdischarge voltage protection state, but now recover magnitude of voltage, electrification reset because VCC voltage is also not reaching to overdischarge
Circuit may can still be in overdischarge voltage protection state.
In implementation, when the first feeder ear VCC voltage is higher than, default overdischarge recovers voltage VODR and the duration is super
When crossing default overdischarge recovery time delay TODR, the battery protecting circuit recovers normal operating conditions；Wherein, it is described pre-
If overdischarge recover voltage VODR and be higher than the default first voltage value.
In implementation, the battery protecting circuit may further include：Overcharge voltage detects circuit and overcharge current
Circuit is detected, wherein, overcharge voltage detection circuit on one side is connected with electrification reset circuit and is connected to the first feeder ear
VCC, the other end are connected with the control circuit；The overcharge current detection circuit on one side is connected with the excessively stream restoring circuit
And be connected to voltage detecting end VM, the other end with it is described control circuit be connected.
In implementation, when the battery protecting circuit is forced to overdischarge voltage protection state, the control circuit output control
Signal processed controls the first power MOS pipe MD to disconnect；When the battery protecting circuit recovers normal operating conditions, the control circuit
Output control signal controls the first power MOS pipe MD conductings.
In implementation, when the battery protecting circuit is in overdischarge voltage protection state, the electricity of the voltage detecting end VM
Crimping is bordering on anode voltage, and the battery protecting circuit is in low-power consumption mode.
In implementation, when the battery protecting circuit is in low-power consumption mode, detection is described in real time for the electrification reset circuit
First feeder ear VCC voltage.
In implementation, the battery protecting circuit is located on system application circuit board.
If because battery protection chip and power MOS pipe are placed on system application circuit board, on system circuit board
Electricity, battery protection chip is equivalent to electricity in the case of loaded, and using prior art, the battery protection chip has
It is likely to occur electricity and is put into electric discharge overcurrent protection state, and due to there is load to connect always, excessively stream is extensive in battery protection chip
The pull-down capability of compound circuit is weaker, and chip lock is in electric discharge overcurrent protection state, it is impossible to regular picture；And use provided herein
Scheme, due to adding electrification reset circuit, when detecting electrification reset electrification reset circuit output useful signal be used for
The battery protecting circuit is forced to be in overdischarge voltage protection state, so as to avoid chip lock in electric discharge overcurrent protection state.
Fig. 3 shows the structural representation of lithium battery in the embodiment of the present application, as illustrated, the lithium battery is including above-mentioned
Battery protecting circuit and battery core, the first end of the battery core is connected with the first feeder ear VCC of the battery protecting circuit,
Two ends are connected with the second feeder ear VSS of the battery protecting circuit, the be connected with the first output end of the control circuit
One power MOS pipe MD, the second power MOS pipe MC being connected with the second output end of the control circuit connect and are connected to described
Second end of battery core.
In implementation, the grid of the first power MOS pipe MD is connected with the control circuit, the of source electrode and the battery core
Two ends be connected, drain electrode be connected with the drain electrode of the second power MOS pipe MC, the grid of the second power MOS pipe MC with it is described
Control circuit is connected, source electrode is connected with the voltage detecting end VM.
In implementation, the first end of the battery core and the second power MOS pipe MC source electrode connect load respectively.
The embodiment of the present application adds electrification reset circuit on the basis of existing technology, is opened from electrification reset is detected
During beginning, the power supply to battery protection chip (battery protection ic) rise to predeterminated voltage, electrification reset circuit output letter
Number from being effectively changed into invalid.
When power-on reset signal is effective, battery protection chip is forced in overdischarge voltage protection state, chip is forbidden
Electric discharge, VM can be pulled high to close to BP+ voltages, and now, chip can be in low-power consumption mode.Meanwhile, the embodiment of the present application will
Battery protection chip is set to self recovery under low-power consumption mode, and (that is, chip detects battery core electricity under low-power consumption mode, still
Pressure), rise with the supply voltage of battery protection chip, power-on reset signal can be changed into invalid, no longer force chip to be in
Discharge voltage guard mode, once protection chip power voltage recovers voltage (VODR) higher than overdischarge, and the duration is big
Recover time delay (TODR) in overdischarge, then return to normal condition from low power consumpting state, power MOS pipe MD is opened, this
Sample, VM can rapidly be dragged down by power MOS pipe, and now the power supply of battery protection chip is also at normal working voltage state, from
And can be loaded with driven, it is to avoid system deadlock is the problem of overcurrent protection state is discharged.
Wherein, the electrification reset circuit described in the embodiment of the present application can have a variety of implementations, as long as ensure that electricity
Source voltage when low and high output two states, while being in overdischarge voltage protection shape when making battery protection chip initial power-on
State, those skilled in the art can designed, designed, concrete structure of the application to electrification reset circuit according to actual needs
It is not limited.
The battery protecting circuit that the embodiment of the present application is provided, by increasing electrification reset circuit, works as battery protection chip
When upper electric, force chip to return to regular picture state from overdischarge voltage protection state, prevent from electrocuting to be locked on bringing onto load putting
The problem of electric overcurrent protection state.
Although having been described for the preferred embodiment of the application, those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the application scope.
Claims (10)
1. a kind of battery protecting circuit, it is characterised in that including：Overdischarge voltage detecting circuit, overdischarge current detection circuit,
Circuit, excessively stream restoring circuit and electrification reset circuit are controlled, wherein, the overdischarge voltage detecting circuit, the inspection of overdischarge electric current
Slowdown monitoring circuit is connected with the control circuit, and the overdischarge voltage detecting circuit is connected and connected with the electrification reset circuit
To the first feeder ear VCC, the overdischarge current detection circuit is connected with the excessively stream restoring circuit and is connected to voltage detecting
Hold VM,
When detecting electrification reset, the electrification reset circuit exports useful signal, and the useful signal is used to force the electricity
Pond protection circuit is in overdischarge voltage protection state；
When the voltage for detecting the first feeder ear VCC reaches default first voltage value, the electrification reset circuit exports invalid letter
Number.
2. battery protecting circuit as claimed in claim 1, it is characterised in that when the first feeder ear VCC voltage is higher than default
Overdischarge when recovering voltage VODR and duration and exceeding default overdischarge and recover time delay TODR, the battery protection
Circuit recovers normal operating conditions；Wherein, the default overdischarge recovers voltage VODR higher than the default first voltage value.
3. battery protecting circuit as claimed in claim 1, it is characterised in that further comprise：Overcharge voltage detects circuit
Circuit is detected with overcharge current, wherein, the overcharge voltage detection circuit on one side is connected and is connected with electrification reset circuit
It is connected to the first feeder ear VCC, the other end with the control circuit；The overcharge current detection circuit on one side and the excessively stream
Restoring circuit is connected and is connected to voltage detecting end VM, the other end and is connected with the control circuit.
4. battery protecting circuit as claimed in claim 1, it is characterised in that the battery protecting circuit is forced to overdischarge electricity
When pressing guard mode, the control circuit output control signal controls the first power MOS pipe MD to disconnect；The battery protecting circuit
When recovering normal operating conditions, the control circuit output control signal controls the first power MOS pipe MD conductings.
5. battery protecting circuit as claimed in claim 1, it is characterised in that the battery protecting circuit is in overdischarge voltage
During guard mode, the voltage of the voltage detecting end VM is close to anode voltage, and the battery protecting circuit is in low work(
Consumption pattern.
6. battery protecting circuit as claimed in claim 5, it is characterised in that the battery protecting circuit is in low-power consumption mode
When, the electrification reset circuit detects the voltage of the first feeder ear VCC in real time.
7. battery protecting circuit as claimed in claim 1, it is characterised in that the battery protecting circuit is located at system application electricity
On the plate of road.
8. a kind of lithium battery, it is characterised in that including the battery protecting circuit and battery core as described in claim 1 to 7 is any,
The first end of the battery core is connected with the first feeder ear VCC of the battery protecting circuit, the second end and the battery protection are electric
The second feeder ear VSS on road is connected, the first power MOS pipe MD for being connected with the first output end of the control circuit, with it is described
The second connected power MOS pipe MC of second output end of control circuit connects and is connected to the second end of the battery core.
9. lithium battery as claimed in claim 8, it is characterised in that the grid of the first power MOS pipe MD and the control
Circuit is connected, source electrode is connected with the second end of the battery core, drain is connected with the drain electrode of the second power MOS pipe MC, described
Circuit is connected second power MOS pipe MC grid, source electrode is connected with the voltage detecting end VM with the control.
10. lithium battery as claimed in claim 9, it is characterised in that the first end of the battery core and second work(
Rate metal-oxide-semiconductor MC source electrode connects load respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710158955.3A CN107039951B (en) | 2017-03-17 | 2017-03-17 | Battery protecting circuit and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710158955.3A CN107039951B (en) | 2017-03-17 | 2017-03-17 | Battery protecting circuit and lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107039951A true CN107039951A (en) | 2017-08-11 |
| CN107039951B CN107039951B (en) | 2019-04-16 |
Family
ID=59533318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710158955.3A Active CN107039951B (en) | 2017-03-17 | 2017-03-17 | Battery protecting circuit and lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107039951B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425508A (en) * | 2017-08-14 | 2017-12-01 | 惠州市德赛电池有限公司 | A kind of multiple current foldback circuit of battery |
| CN108923489A (en) * | 2018-07-25 | 2018-11-30 | 南京中感微电子有限公司 | Battery protecting circuit |
| CN110198025A (en) * | 2019-06-26 | 2019-09-03 | 南京中感微电子有限公司 | Battery protection system with temperature sensing circuit |
| WO2019184386A1 (en) * | 2018-03-29 | 2019-10-03 | 深圳市道通智能航空技术有限公司 | Safety protection method for battery of unmanned aerial vehicle and device thereof |
| CN112117799A (en) * | 2020-09-15 | 2020-12-22 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electronic device |
| WO2022057596A1 (en) * | 2020-09-15 | 2022-03-24 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery assembly and electronic device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050182987A1 (en) * | 2004-02-16 | 2005-08-18 | Atsushi Sakurai | Battery state monitoring circuit and battery device |
| CN203205845U (en) * | 2012-11-22 | 2013-09-18 | 无锡中星微电子有限公司 | Battery protection circuit with post-discharge overcurrent protection self-recovery function |
| CN103474967A (en) * | 2012-06-07 | 2013-12-25 | 苏州赛芯电子科技有限公司 | Highly-integrated battery protection circuit |
| CN103532104A (en) * | 2013-10-17 | 2014-01-22 | 无锡中星微电子有限公司 | Battery protection circuit |
| CN203660517U (en) * | 2014-01-09 | 2014-06-18 | 上海长园维安电子线路保护有限公司 | Additional automatic recovery device of lithium battery protection circuit |
| CN104319742A (en) * | 2014-10-28 | 2015-01-28 | 无锡中星微电子有限公司 | Battery protection circuit |
-
2017
- 2017-03-17 CN CN201710158955.3A patent/CN107039951B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050182987A1 (en) * | 2004-02-16 | 2005-08-18 | Atsushi Sakurai | Battery state monitoring circuit and battery device |
| CN103474967A (en) * | 2012-06-07 | 2013-12-25 | 苏州赛芯电子科技有限公司 | Highly-integrated battery protection circuit |
| CN203205845U (en) * | 2012-11-22 | 2013-09-18 | 无锡中星微电子有限公司 | Battery protection circuit with post-discharge overcurrent protection self-recovery function |
| CN103532104A (en) * | 2013-10-17 | 2014-01-22 | 无锡中星微电子有限公司 | Battery protection circuit |
| CN203660517U (en) * | 2014-01-09 | 2014-06-18 | 上海长园维安电子线路保护有限公司 | Additional automatic recovery device of lithium battery protection circuit |
| CN104319742A (en) * | 2014-10-28 | 2015-01-28 | 无锡中星微电子有限公司 | Battery protection circuit |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425508A (en) * | 2017-08-14 | 2017-12-01 | 惠州市德赛电池有限公司 | A kind of multiple current foldback circuit of battery |
| WO2019184386A1 (en) * | 2018-03-29 | 2019-10-03 | 深圳市道通智能航空技术有限公司 | Safety protection method for battery of unmanned aerial vehicle and device thereof |
| CN108923489A (en) * | 2018-07-25 | 2018-11-30 | 南京中感微电子有限公司 | Battery protecting circuit |
| CN108923489B (en) * | 2018-07-25 | 2020-10-27 | 南京中感微电子有限公司 | Battery protection circuit |
| CN110198025A (en) * | 2019-06-26 | 2019-09-03 | 南京中感微电子有限公司 | Battery protection system with temperature sensing circuit |
| CN110198025B (en) * | 2019-06-26 | 2021-05-07 | 南京中感微电子有限公司 | Battery protection system with temperature detection circuit |
| CN112117799A (en) * | 2020-09-15 | 2020-12-22 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electronic device |
| WO2022057596A1 (en) * | 2020-09-15 | 2022-03-24 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery assembly and electronic device |
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|---|---|
| CN107039951B (en) | 2019-04-16 |
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