CN102983556A - Battery protection circuit with self-recovery function after discharge over-current protection - Google Patents
Battery protection circuit with self-recovery function after discharge over-current protection Download PDFInfo
- Publication number
- CN102983556A CN102983556A CN2012104783533A CN201210478353A CN102983556A CN 102983556 A CN102983556 A CN 102983556A CN 2012104783533 A CN2012104783533 A CN 2012104783533A CN 201210478353 A CN201210478353 A CN 201210478353A CN 102983556 A CN102983556 A CN 102983556A
- Authority
- CN
- China
- Prior art keywords
- battery
- link
- discharge
- negative pole
- control circuit
- 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.)
- Granted
Links
- 238000011084 recovery Methods 0.000 title abstract 2
- 238000007599 discharging Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a battery protection circuit which comprises a control circuit and a discharge path which is connected in series between a battery cathode connection end and a battery core cathode connection end. A switching element, a diode and a resistor R0 are arranged on the discharge path. After the circuit is in a discharge over-current protection state, the control circuit controls the switching element to be conducted to enable the discharge path between the battery cathode connection end and the battery core cathode connection end to be conducted; the control circuit determines whether to exit the discharge over-current protection state according to the voltage at the battery cathode connection end; and after exit of the discharge over-current protection state is determined, the control circuit controls the switching element to be cut off, so that the discharge path between the battery cathode connection end and the battery core cathode connection end is cut off. Compared with the prior art, the battery protection circuit can recover from the discharge over-current protection state automatically as a discharge over-current recovery circuit is added in the battery protection circuit; and the structure is simple, and the cost is low.
Description
[technical field]
The present invention relates to circuit design field, particularly a kind of have a battery protecting circuit of self-recovering function after the discharge overcurrent protection.
[background technology]
Fig. 1 shows the structural representation of a kind of battery protecting circuit system.As shown in Figure 1, described battery protecting circuit system comprises battery battery core Bat, resistance R 1, capacitor C 1, battery protecting circuit 110, resistance R 2, charge power switch 130 and discharge power switch 120.Resistance R 1 and capacitor C 1 are series between the anodal B+ and negative pole B-of battery battery core Bat, discharge power switch 120 and charge power switch 130 are series between the negative pole P-of the negative pole B-of battery battery core and battery, and the anodal B+ of battery battery core Bat directly links to each other with the anodal P+ of battery.
Described charge power switch 130 comprises NMOS (N-channel Metal Oxide Semiconductor) field effect transistor M N2 and parasitizes the interior diode D2 of its body.Described discharge power switch 120 comprises nmos fet MN1 and parasitizes the interior diode D1 of its body.The drain electrode of nmos pass transistor MN1 links to each other with the drain electrode of nmos pass transistor MN2, and the source electrode of nmos pass transistor MN1 links to each other with the negative pole B-of battery battery core, and the source electrode of nmos pass transistor MN2 links to each other with the negative pole P-of battery.
Described battery protecting circuit 110 comprises three links (or being called the test side) and two control ends, and three links are respectively the anodal B+ link of battery battery core VDD, battery battery core negative pole B-link VSS and battery cathode P-link V
M, two control ends are respectively charging control end C
OUTWith control of discharge end D
OUTWherein link VDD is connected between resistance R 1 and the capacitor C 1, and link VSS links to each other with the negative pole B-of battery battery core Bat, and link VM is connected in the negative pole P-of battery by resistance R 2, charging control end C
OUTLink to each other with the control end of charge power switch 130, namely the grid with nmos pass transistor MN2 links to each other, control of discharge end D
OUTLink to each other with the control end of discharge power switch 120, namely the grid with nmos pass transistor MN1 links to each other.
Described battery protecting circuit 110 can carry out charge protection and discharge prevention to battery battery core Bat.When charging normal, described battery protecting circuit 110 control nmos pass transistor MN2 conductings, nmos pass transistor MN1 cut-off, charging current flows to nmos pass transistor MN2 from the body diode D1 of nmos pass transistor MN1.When charging abnormal (such as charging overcurrent and charging overvoltage), described battery protecting circuit 110 control nmos pass transistor MN2 cut-offs, thus cut off charging process.When carrying out regular picture, described battery protecting circuit 110 control nmos pass transistor MN2 cut-offs, nmos pass transistor MN1 conducting, discharging current flows to nmos pass transistor MN1 from the body diode D2 of nmos pass transistor MN2.When discharge abnormal (such as discharge overcurrent and discharge overvoltage), described battery protecting circuit 110 control nmos pass transistor MN1 cut-offs, thus cut off discharge process.
Described battery protecting circuit 110 judges whether the overcurrent that discharges by the pressure reduction between link VM and the VSS, if pressure reduction surpasses predetermined voltage threshold, thinks that then discharging current surpasses predetermined current threshold, then starts the discharge overcurrent protection function, with control of discharge end D
OUTBe pulled down to the negative pole B-current potential of battery battery core, forbid that described discharge power switch 120 discharges.
In the existing battery protection system, in case enter discharge overcurrent protection state, then have to manually go to recover, system can't recover usually automatically, perhaps needs complicated automatic restoring circuit, and design is complicated, and cost is higher.Therefore, be necessary to provide a kind of improved technical scheme to overcome the problems referred to above.
[summary of the invention]
The object of the present invention is to provide a kind of battery protecting circuit, can automatically under discharge overcurrent protection state, recover, and simple in structure, and cost is low.
In order to address the above problem; the invention provides a kind of battery protecting circuit; it comprises the battery cathode link that is connected with battery cathode; the battery battery core negative pole link that is connected with the battery battery core negative pole; the charging control end that the control of discharge end that is connected with the control end of discharge power switch is connected with the control end with the charge power switch; its also comprise control circuit and be connected on the battery cathode link and battery battery core negative pole link between discharge path; comprise switching device on this discharge path; diode and resistance R 0; after entering discharge overcurrent protection state; described switching device conducting controlled by described control circuit so that the discharge path conducting between battery cathode link and the battery battery core negative pole link; described control circuit determines whether to withdraw from discharge overcurrent protection state according to the voltage of battery cathode link; after determining to withdraw from discharge overcurrent protection state, described switching device cut-off controlled by described control circuit so that the cut-off of the discharge path between battery cathode link and the battery battery core negative pole link.
Further, the negative electrode of described diode connects a link of described switching device, and the anode of described diode links to each other with described battery cathode link, and another link of described switching device links to each other with described battery battery core negative pole link.
Further, described discharge path provides milliampere rank and following electric current.
Further, under discharge overcurrent protection state, when the voltage of described battery cathode link was lower than predetermined voltage threshold, described control circuit determined to withdraw from discharge overcurrent protection state.
Further, described control circuit determines whether to enter discharge overcurrent protection state according to the pressure reduction between battery cathode link and the battery battery core negative pole link.
Further, described switching device is nmos fet, and described control circuit outputs control signals to the grid of described nmos fet
Compared with prior art; the present invention has increased discharge overcurrent restore circuit in battery protecting circuit; when discharging the overcurrent protection state; between the negative pole of the negative pole of battery and battery battery core, form discharge path; after discharge overcurrent reason is eliminated; this discharge path can drop-down battery the voltage of negative pole, thereby can remove discharge overcurrent protection state.
[description of drawings]
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.Wherein:
Fig. 1 is the structural representation of battery protecting circuit system;
Fig. 2 is the electrical block diagram that is arranged at the discharge overcurrent restore circuit in the battery protecting circuit in one embodiment of the present of invention.
[embodiment]
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Alleged " embodiment " or " embodiment " refer to be contained in special characteristic, structure or the characteristic at least one implementation of the present invention herein.Different local in this manual " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or the embodiment mutually exclusive with other embodiment optionally.Unless stated otherwise, herein connection, the word that the expression that links to each other, join is electrically connected all represents directly or indirectly to be electrical connected.
Please refer to shown in Figure 1ly, wherein each part was all described in background, no longer was repeated in this description here.When discharge, battery protecting circuit 110 judges whether the overcurrent that discharges by the pressure reduction between link VM (being the negative pole P-of battery) and the VSS (being the negative pole B-of battery battery core).This moment, the voltage of VM end was higher than the voltage that VSS holds, and pressure reduction between the two and discharging current proportion relation.If differential pressure surpasses predetermined voltage threshold, think that then discharging current surpasses predetermined current threshold, then start the discharge overcurrent protection function, with control of discharge end D
OUTBe pulled down to the negative pole B-current potential of battery battery core, forbid that described discharge power switch 120 discharges.When the reason of discharge overcurrent is eliminated, wish that described battery protecting circuit 110 can detect automatically, and automatically from the discharge over-current state, recover.
In the present invention; as shown in Figure 2; comprise control circuit in the described battery protecting circuit 110 and be arranged at link VM and link VSS between discharge path, described discharge path comprises resistance R 0, diode D0 and the switching device MN0 that is connected in successively between link VM and the link VSS.Described control circuit judges whether the overcurrent that discharges according to the pressure reduction between link VM (being the negative pole P-of battery) and the VSS (being the negative pole B-of battery battery core); when detecting the discharge overcurrent; forbid 120 discharges of discharge power switch; so just entered discharge overcurrent protection state; meanwhile; it also controls described switching device MN0 conducting, like this so that the discharge path conducting between link VM and the link VSS.
In discharge during overcurrent protection, the load meeting between the both positive and negative polarity P+/P-of battery is drawn high current potential near anodal P+ to negative pole P-voltage, and the voltage held of VM can be higher than the voltage that VSS holds like this.And in the present invention; be provided with the path between link VM and VSS of a conducting under discharge overcurrent protection state; like this under the discharge prevention state; link VSS provides a pull-down current to link VM; in case the reason of discharge overcurrent is eliminated; eliminate such as short circuit, the voltage of link VM will be dragged down.Therefore, described control circuit determines whether to withdraw from discharge overcurrent protection state according to the voltage of link VM in the present invention.When if the voltage of link VM is lower than predetermined voltage threshold under discharge overcurrent protection state; described control circuit then determines to withdraw from discharge overcurrent protection state; control described discharge power switch 120 and recover regular picture, otherwise continue to keep discharge overcurrent protection state.After described control circuit 210 determines to withdraw from discharge overcurrent protection state, control described switching device MN0 cut-off, like this so that the cut-off of the discharge path between link VM and the link VSS, and prevent from leaking electricity.
In order to reduce power consumption, under discharge overcurrent protection state, from link V
MFlow to link V
SSPull-down current very little, be milliampere and following other electric current of level, the size that can regulate by the size that resistance R 0 is set in the present invention described pull-down current.
The negative electrode of described diode D0 connects the link of described switching device MN0, and described anode links to each other with link VM, and another link of described switching device MN0 links to each other with link VSS.
In one embodiment, as shown in Figure 2, described switching device MN0 is nmos fet, and its grid connects described control circuit, and described control circuit output control signal S1 controls conducting and the cut-off of described switching device MN0.When entering discharge overcurrent protection state, control switch device MN0 conducting, when withdrawing from discharge overcurrent protection state, control switch device MN0 cut-off.Diode D0 is used for allowing link VM unidirectional by electric current to link VSS, stops VSS to leak electricity to VM, and utilizes the reverse voltage endurance capability of diode D0 to bear VM to most pressure drops of VSS when VM voltage is lower than VSS.Resistance R 0 also can be positioned between MN0 and the diode D0, can also be positioned between MN0 and the VSS.
In the present invention, the word that the expression such as " connection ", " linking to each other ", " company ", " connecing " is electrically connected if no special instructions, then represents direct or indirect electric connection.
It is pointed out that and be familiar with the scope that any change that the person skilled in art does the specific embodiment of the present invention does not all break away from claims of the present invention.Correspondingly, the scope of claim of the present invention also is not limited only to previous embodiment.
Claims (6)
1. battery protecting circuit; it comprises the battery cathode link that is connected with battery cathode; the battery battery core negative pole link that is connected with the battery battery core negative pole; the charging control end that the control of discharge end that is connected with the control end of discharge power switch is connected with the control end with the charge power switch; it is characterized in that; its also comprise control circuit and be connected on the battery cathode link and battery battery core negative pole link between discharge path; comprise switching device on this discharge path; diode and resistance R 0
After entering discharge overcurrent protection state, described switching device conducting controlled by described control circuit so that the discharge path conducting between battery cathode link and the battery battery core negative pole link,
Described control circuit determines whether to withdraw from discharge overcurrent protection state according to the voltage of battery cathode link; after determining to withdraw from discharge overcurrent protection state, described switching device cut-off controlled by described control circuit so that the cut-off of the discharge path between battery cathode link and the battery battery core negative pole link.
2. battery protecting circuit according to claim 1; it is characterized in that; the negative electrode of described diode connects a link of described switching device; the anode of described diode links to each other with described battery cathode link, and another link of described switching device links to each other with described battery battery core negative pole link.
3. battery protecting circuit according to claim 1 is characterized in that, described discharge path provides milliampere rank and following electric current.
4. battery protecting circuit according to claim 1 is characterized in that, under discharge overcurrent protection state, when the voltage of described battery cathode link was lower than predetermined voltage threshold, described control circuit determined to withdraw from discharge overcurrent protection state.
5. battery protecting circuit according to claim 1 is characterized in that, described control circuit determines whether to enter discharge overcurrent protection state according to the pressure reduction between battery cathode link and the battery battery core negative pole link.
6. arbitrary described battery protecting circuit is characterized in that according to claim 1-5, and described switching device is nmos fet, and described control circuit outputs control signals to the grid of described nmos fet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210478353.3A CN102983556B (en) | 2012-11-22 | 2012-11-22 | There is the battery protecting circuit of self-recovering function after electric discharge overcurrent protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210478353.3A CN102983556B (en) | 2012-11-22 | 2012-11-22 | There is the battery protecting circuit of self-recovering function after electric discharge overcurrent protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102983556A true CN102983556A (en) | 2013-03-20 |
| CN102983556B CN102983556B (en) | 2016-03-09 |
Family
ID=47857377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210478353.3A Active CN102983556B (en) | 2012-11-22 | 2012-11-22 | There is the battery protecting circuit of self-recovering function after electric discharge overcurrent protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102983556B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490474A (en) * | 2013-09-26 | 2014-01-01 | 无锡中星微电子有限公司 | Power management circuit |
| CN104319742A (en) * | 2014-10-28 | 2015-01-28 | 无锡中星微电子有限公司 | Battery protection circuit |
| CN104682355A (en) * | 2015-02-13 | 2015-06-03 | 深圳市富满电子集团股份有限公司 | Lithium battery protective circuit |
| CN104967156A (en) * | 2015-06-08 | 2015-10-07 | 惠州Tcl移动通信有限公司 | System capable of releasing overcurrent protection state of battery |
| CN105680422A (en) * | 2016-04-07 | 2016-06-15 | 无锡中感微电子股份有限公司 | Improved battery protection circuit and system |
| CN107300673A (en) * | 2016-04-15 | 2017-10-27 | 福特全球技术公司 | Battery from overcurrent diagnostic system |
| CN107992377A (en) * | 2017-12-14 | 2018-05-04 | Tcl移动通信科技（宁波）有限公司 | Release method, system and the storage medium of the screen protection locking of mobile terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5705911A (en) * | 1995-11-30 | 1998-01-06 | Sanyo Electric Co., Ltd. | Charging circuit |
| CN101340084A (en) * | 2008-08-12 | 2009-01-07 | 北京中星微电子有限公司 | Driving circuit for discharge over-current protection and recovery, battery protection circuit and system |
| CN102761161A (en) * | 2012-06-19 | 2012-10-31 | 无锡中星微电子有限公司 | Mobile power supply |
| 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 |
-
2012
- 2012-11-22 CN CN201210478353.3A patent/CN102983556B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5705911A (en) * | 1995-11-30 | 1998-01-06 | Sanyo Electric Co., Ltd. | Charging circuit |
| CN101340084A (en) * | 2008-08-12 | 2009-01-07 | 北京中星微电子有限公司 | Driving circuit for discharge over-current protection and recovery, battery protection circuit and system |
| CN102761161A (en) * | 2012-06-19 | 2012-10-31 | 无锡中星微电子有限公司 | Mobile power supply |
| 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 |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490474A (en) * | 2013-09-26 | 2014-01-01 | 无锡中星微电子有限公司 | Power management circuit |
| CN103490474B (en) * | 2013-09-26 | 2016-03-23 | 无锡中感微电子股份有限公司 | A kind of electric power management circuit |
| CN104319742B (en) * | 2014-10-28 | 2017-07-07 | 无锡中感微电子股份有限公司 | Battery protecting circuit |
| CN104319742A (en) * | 2014-10-28 | 2015-01-28 | 无锡中星微电子有限公司 | Battery protection circuit |
| CN104682355A (en) * | 2015-02-13 | 2015-06-03 | 深圳市富满电子集团股份有限公司 | Lithium battery protective circuit |
| CN104682355B (en) * | 2015-02-13 | 2018-03-30 | 深圳市富满电子集团股份有限公司 | A kind of lithium battery protection circuit |
| CN104967156A (en) * | 2015-06-08 | 2015-10-07 | 惠州Tcl移动通信有限公司 | System capable of releasing overcurrent protection state of battery |
| CN104967156B (en) * | 2015-06-08 | 2019-08-09 | 惠州Tcl移动通信有限公司 | The system that the overcurrent protection state of battery can be released |
| CN105680422A (en) * | 2016-04-07 | 2016-06-15 | 无锡中感微电子股份有限公司 | Improved battery protection circuit and system |
| CN105680422B (en) * | 2016-04-07 | 2018-06-15 | 无锡中感微电子股份有限公司 | Improved battery protects circuit and system |
| CN107300673A (en) * | 2016-04-15 | 2017-10-27 | 福特全球技术公司 | Battery from overcurrent diagnostic system |
| CN107300673B (en) * | 2016-04-15 | 2021-03-19 | 福特全球技术公司 | Battery overcurrent diagnosis system |
| CN107992377A (en) * | 2017-12-14 | 2018-05-04 | Tcl移动通信科技（宁波）有限公司 | Release method, system and the storage medium of the screen protection locking of mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102983556B (en) | 2016-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203205845U (en) | Battery protection circuit with post-discharge overcurrent protection self-recovery function | |
| CN110380474B (en) | Battery protection controller and battery charge-discharge protection circuit | |
| TWI710190B (en) | Secondary battery protection semiconductor, secondary battery protection device and battery pack | |
| CN102983556B (en) | There is the battery protecting circuit of self-recovering function after electric discharge overcurrent protection | |
| CN107422257B (en) | Relay detection circuit and unit | |
| TWI580154B (en) | Charge/discharge control circuit and battery device | |
| EP2190100A2 (en) | Overcurrent protection circuit of a rechargeable battery | |
| TWI610513B (en) | Charge and discharge control circuit and battery device | |
| CN104319742B (en) | Battery protecting circuit | |
| CN201398070Y (en) | Circuit to prevent reverse battery polarity | |
| CN103532104A (en) | Battery protection circuit | |
| CN102403756A (en) | Charge/discharge control circuit and battery device | |
| CN1988315A (en) | Battery device | |
| KR102439642B1 (en) | battery device | |
| CN102270867A (en) | Battery state monitoring circuit and battery device | |
| CN103036196A (en) | Device for overvoltage protection and method thereof | |
| CN106100008A (en) | Cell apparatus | |
| CN102983557B (en) | Battery protective circuit and charging power switch control signal producing circuit thereof | |
| CN108365276B (en) | Activation circuit and activation method thereof, battery protection circuit and battery | |
| TWI738686B (en) | Charging/discharging control circuit and battery apparatus | |
| CN209119865U (en) | A kind of multi-series lithium battery hardware short-circuit protection circuit | |
| CN102005788B (en) | Battery state monitoring circuit and battery apparatus | |
| CN103490474A (en) | Power management circuit | |
| CN203522159U (en) | Cell protection circuit | |
| CN204144922U (en) | Battery protecting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 214028 Jiangsu Province, Wuxi City District Qingyuan Road No. 18 Taihu International Science Park sensor network university science and Technology Park 530 building A1001 Patentee after: WUXI ZHONGGAN MICROELECTRONIC CO., LTD. Address before: A 530 Taihu international science and Technology Park building 214135 Qingyuan Road in Jiangsu province Wuxi City District 10 layer Patentee before: Wuxi Vimicro Co., Ltd. |