CN102983556B - There is the battery protecting circuit of self-recovering function after electric discharge overcurrent protection - Google Patents
There is the battery protecting circuit of self-recovering function after electric discharge overcurrent protection Download PDFInfo
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- CN102983556B CN102983556B CN201210478353.3A CN201210478353A CN102983556B CN 102983556 B CN102983556 B CN 102983556B CN 201210478353 A CN201210478353 A CN 201210478353A CN 102983556 B CN102983556 B CN 102983556B
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- battery
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- overcurrent protection
- electric discharge
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Abstract
The invention provides a kind of battery protecting circuit, it comprises control circuit and is connected on the discharge path between battery cathode link and battery battery core negative pole link, this discharge path comprises switching device, diode and resistance R0, after entering electric discharge overcurrent protection state, described control circuit controls described switch device conductive to make the discharge path conducting between battery cathode link and battery battery core negative pole link, described control circuit determines whether to exit electric discharge overcurrent protection state according to the voltage of battery cathode link, after determining to exit electric discharge overcurrent protection state, described control circuit controls the cut-off of described switching device to make the discharge path between battery cathode link and battery battery core negative pole link end.Compared with prior art, the present invention adds electric discharge overcurrent restore circuit in battery protecting circuit, and it can recover automatically from electric discharge overcurrent protection state, and structure is simple, and cost is low.
Description
[technical field]
The present invention relates to circuit design field, particularly a kind of have the battery protecting circuit of self-recovering function after electric discharge overcurrent protection.
[background technology]
Fig. 1 shows a kind of structural representation of battery protecting circuit system.As shown in Figure 1, described battery protecting circuit system comprises battery battery core Bat, resistance R1, electric capacity C1, battery protecting circuit 110, resistance R2, charge power switch 130 and discharge power switch 120.Resistance R1 and electric capacity C1 is series between the positive pole B+ of battery battery core Bat and negative pole B-, discharge power switch 120 and charge power switch 130 are series between the negative pole B-of battery battery core and the negative pole P-of battery, and the positive pole B+ of battery battery core Bat is directly connected with the positive pole P+ of battery.
Described charge power switch 130 comprises NMOS (N-channelMetalOxideSemiconductor) field effect transistor M N2 and parasitizes the diode D2 in its body.Described discharge power switch 120 comprises nmos fet MN1 and parasitizes the diode D1 in its body.The drain electrode of nmos pass transistor MN1 is connected with the drain electrode of nmos pass transistor MN2, and the source electrode of nmos pass transistor MN1 is connected with the negative pole B-of battery battery core, and the source electrode of nmos pass transistor MN2 is connected with the negative pole P-of battery.
Described battery protecting circuit 110 comprises three links (or being called test side) and two control ends, and three links are respectively battery battery core positive pole B+ link 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
oUT.Wherein link VDD is connected between resistance R1 and electric capacity C1, and link VSS is connected with the negative pole B-of battery battery core Bat, and link VM is connected to the negative pole P-of battery by resistance R2, charging control end C
oUTbe connected with the control end of charge power switch 130, be namely connected with the grid of nmos pass transistor MN2, control of discharge end D
oUTbe connected with the control end of discharge power switch 120, be namely connected with the grid of nmos pass transistor MN1.
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 controls nmos pass transistor MN2 conducting, and nmos pass transistor MN1 ends, and charging current flows to nmos pass transistor MN2 from the body diode D1 of nmos pass transistor MN1.When generation of charging abnormal (such as charge overcurrent and charging overvoltage), described battery protecting circuit 110 controls nmos pass transistor MN2 to be ended, thus has cut off charging process.When carrying out regular picture, described battery protecting circuit 110 controls nmos pass transistor MN2 to be ended, and nmos pass transistor MN1 conducting, discharging current flows to nmos pass transistor MN1 from the body diode D2 of nmos pass transistor MN2.When generation of discharging abnormal (such as discharge overcurrent and electric discharge overvoltage), described battery protecting circuit 110 controls nmos pass transistor MN1 to be ended, thus has cut off discharge process.
Described battery protecting circuit 110 judges whether by the pressure reduction between link VM and VSS the overcurrent that discharges, if pressure reduction exceedes predetermined voltage threshold, then thinks that discharging current exceedes predetermined current threshold, then star t-up discharge overcurrent protection function, by 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 existing battery protection system, once enter electric discharge overcurrent protection state, then have to manually go to recover, system cannot be recovered usually automatically, or needs complicated automatic restoring circuit, and design is complicated, and cost is higher.Therefore, be necessary to provide a kind of technical scheme of improvement 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 recover from electric discharge overcurrent protection state, and structure is simple, cost is low.
In order to solve the problem, the invention provides a kind of battery protecting circuit, it comprises the battery cathode link be connected with battery cathode, the battery battery core negative pole link be connected with battery battery core negative pole, the control of discharge end be connected with the control end of discharge power switch and the charging control end be connected with the control end of charge power switch, it also comprises control circuit and is connected on the discharge path between battery cathode link and battery battery core negative pole link, this discharge path comprises switching device, diode and resistance R0, after entering electric discharge overcurrent protection state, described control circuit controls described switch device conductive to make the discharge path conducting between battery cathode link and battery battery core negative pole link, described control circuit determines whether to exit electric discharge overcurrent protection state according to the voltage of battery cathode link, after determining to exit electric discharge overcurrent protection state, described control circuit controls the cut-off of described switching device to make the discharge path between battery cathode link and battery battery core negative pole link end.
Further, the negative electrode of described diode connects a link of described switching device, and the anode of described diode is connected with described battery cathode link, and another link of described switching device is connected with described battery battery core negative pole link.
Further, described discharge path provides milliampere rank and following electric current.
Further, under electric discharge overcurrent protection state, when the voltage of described battery cathode link is lower than predetermined voltage threshold, described control circuit is determined to exit electric discharge overcurrent protection state.
Further, described control circuit determines whether to enter electric discharge overcurrent protection state according to the pressure reduction between battery cathode link and 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 adds electric discharge overcurrent restore circuit in battery protecting circuit; when carrying out electric discharge overcurrent protection state; discharge path is formed between the negative pole and the negative pole of battery battery core of battery; after electric discharge overcurrent reason is eliminated; this discharge path can the voltage of negative pole of drop-down battery, thus can remove electric discharge overcurrent protection state.
[accompanying drawing explanation]
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.Wherein:
Fig. 1 is the structural representation of battery protecting circuit system;
Fig. 2 is the electrical block diagram being arranged at the electric discharge overcurrent restore circuit in battery protecting circuit in one embodiment of the present of invention.
[embodiment]
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Alleged herein " embodiment " or " embodiment " refers to special characteristic, structure or the characteristic that can be contained at least one implementation of the present invention.Different local in this manual " in one embodiment " occurred not all refers to same embodiment, neither be independent or optionally mutually exclusive with other embodiments embodiment.Unless stated otherwise, connection herein, be connected, word that the expression that connects is electrically connected all represents and is directly or indirectly electrical connected.
Please refer to shown in Fig. 1, wherein each part all described in background, no longer repeated description here.When discharging, battery protecting circuit 110 judges whether by the pressure reduction between link VM (i.e. the negative pole P-of battery) and VSS (i.e. the negative pole B-of battery battery core) overcurrent that discharges.The now voltage held higher than VSS of voltage of VM end, and pressure reduction between the two and discharging current proportion relation.If differential pressure exceedes predetermined voltage threshold, then think that discharging current exceedes predetermined current threshold, then star t-up discharge overcurrent protection function, by 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 the overcurrent that discharges is eliminated, wish that described battery protecting circuit 110 can detect automatically, and automatically recover from electric discharge over-current state.
In the present invention; as shown in Figure 2; described battery protecting circuit 110 comprises control circuit and is arranged at the discharge path between link VM and link VSS, and described discharge path comprises the resistance R0, diode D0 and the switching device MN0 that are connected to successively between link VM and link VSS.Described control circuit judges whether according to the pressure reduction between link VM (i.e. the negative pole P-of battery) and VSS (i.e. the negative pole B-of battery battery core) overcurrent that discharges; when electric discharge overcurrent being detected; forbid that discharge power switch 120 discharges; so just enter electric discharge overcurrent protection state; meanwhile; it also controls described switching device MN0 conducting, makes the discharge path conducting between link VM and link VSS like this.
When discharging overcurrent protection, the load between the both positive and negative polarity P+/P-of battery can negative pole P-voltage high to the current potential close to positive pole P+, and the voltage of such VM end can higher than the voltage of VSS end.And in the present invention; be provided with the path between link VM and VSS of a conducting under electric discharge overcurrent protection state; like this under discharge prevention state; link VSS provides a pull-down current to link VM; once the reason of electric discharge overcurrent is eliminated; such as short circuit is eliminated, and the voltage of link VM will be dragged down.Therefore, described control circuit determines whether to exit electric discharge overcurrent protection state according to the voltage of link VM in the present invention.If when under electric discharge overcurrent protection state, the voltage of link VM is lower than predetermined voltage threshold; described control circuit then determines to exit electric discharge overcurrent protection state; control described discharge power switch 120 and recover regular picture, otherwise continue to keep electric discharge overcurrent protection state.After described control circuit 210 determines to exit electric discharge overcurrent protection state, control described switching device MN0 and end, make the discharge path between link VM and link VSS end like this, and prevent electric leakage.
In order to reduce power consumption, under electric discharge overcurrent protection state, from link V
mflow to link V
sSpull-down current very little, be the electric current of milliampere and following rank, the size of described pull-down current can be regulated in the present invention by the size arranging resistance R0.
The negative electrode of described diode D0 connects a link of described switching device MN0, and described anode is connected with link VM, and another link of described switching device MN0 is connected 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 exports conducting and the cut-off that control signal S1 controls described switching device MN0.When entering electric discharge overcurrent protection state, control switch device MN0 conducting, when exiting electric discharge overcurrent protection state, control switch device MN0 ends.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 at VM voltage lower than most pressure drops of bearing VM to VSS during VSS.Resistance R0 also can be positioned between MN0 and diode D0, can also be positioned between MN0 and VSS.
In the present invention, " connection ", " being connected ", " company ", " connecing " etc. represent the word be electrically connected, and if no special instructions, then represent direct or indirect electric connection.
It is pointed out that the scope be familiar with person skilled in art and any change that the specific embodiment of the present invention is done all do not departed to claims of the present invention.Correspondingly, the scope of claim of the present invention is also not limited only to previous embodiment.
Claims (2)
1. a battery protecting circuit; it charging control end comprising the battery cathode link be connected with battery cathode, the battery battery core negative pole link be connected with battery battery core negative pole, the control of discharge end be connected with the control end of discharge power switch and be connected with the control end of charge power switch; it is characterized in that; it also comprises control circuit and is connected on the discharge path between battery cathode link and battery battery core negative pole link; this discharge path comprises switching device, diode and resistance R0
After entering electric discharge overcurrent protection state, described control circuit controls described switch device conductive to make the discharge path conducting between battery cathode link and battery battery core negative pole link,
Described control circuit determines whether to exit electric discharge overcurrent protection state according to the voltage of battery cathode link; after determining to exit electric discharge overcurrent protection state; described control circuit controls the cut-off of described switching device to make the discharge path between battery cathode link and battery battery core negative pole link end
The negative electrode of described diode connects a link of described switching device, and the anode of described diode is connected with described battery cathode link, and another link of described switching device is connected with described battery battery core negative pole link,
Described discharge path provides milliampere rank and following electric current,
Under electric discharge overcurrent protection state, when the voltage of described battery cathode link is lower than predetermined voltage threshold, described control circuit is determined to exit electric discharge overcurrent protection state,
Described control circuit determines whether to enter electric discharge overcurrent protection state according to the pressure reduction between battery cathode link and battery battery core negative pole link.
2. battery protecting circuit according to claim 1, is characterized in that, 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 CN102983556A (en) | 2013-03-20 |
| CN102983556B true CN102983556B (en) | 2016-03-09 |
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| 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 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| US9707855B1 (en) * | 2016-04-15 | 2017-07-18 | Ford Global Technologies, Llc | Battery 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 |
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| CN102983556A (en) | 2013-03-20 |
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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. |