CN105244850A - Battery protection circuit and control method therefor - Google Patents
Battery protection circuit and control method therefor Download PDFInfo
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- CN105244850A CN105244850A CN201510648939.3A CN201510648939A CN105244850A CN 105244850 A CN105244850 A CN 105244850A CN 201510648939 A CN201510648939 A CN 201510648939A CN 105244850 A CN105244850 A CN 105244850A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 230000001351 cycling effect Effects 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 14
- 230000008030 elimination Effects 0.000 claims description 6
- 238000003379 elimination reaction Methods 0.000 claims description 6
- 230000002441 reversible effect Effects 0.000 claims description 3
- 238000007600 charging Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000012790 confirmation Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 2
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- 239000004065 semiconductor Substances 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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Abstract
The invention discloses a battery protection circuit and a control method therefor. The circuit comprises a switch apparatus connected between a battery and a load, a detection apparatus used for detecting the current between the battery and the switch apparatus and converting the current into a corresponding first voltage value, and a control apparatus connected with the switch apparatus and the detection apparatus separately; the control apparatus is used for controlling the detection apparatus to compare the detected first voltage value with a reference voltage value, controlling the switch apparatus to be kept in an on state when the first voltage value is less than or equal to the reference voltage value, controlling the switch apparatus to be switched off for a preset time and then to be switched on when the first voltage value is greater than the reference voltage value, controlling the detection apparatus to perform circulation operation when the switch apparatus is switched on, and controlling the switch apparatus to be kept in an off state when the circulation operation times of the detection apparatus is greater than a preset circulation times. The problem of false triggering for short circuit protection of the battery protection circuit can be avoided, and the accuracy in short circuit protection is improved.
Description
Technical field
The present invention relates to battery protection technical field, particularly relate to a kind of battery protecting circuit and control method thereof.
Background technology
Current electric bicycle, balance car, back-up source etc. adopt the electronic equipment of electrokinetic cell, generally can configure battery protecting circuit in order to when short trouble appears in the circuit of equipment, prevent battery from sustaining damage.
Short-circuit protection of the prior art be generally by detect cell output current size and compare with given current protection value; if the current value detected is greater than given current protection value; then control switch turns off, and with the output of cutting off the electricity supply, thus protects.
But, when this battery protecting circuit is used in capacitive load (load of voltage delay current characteristics), just there will be the action of protection by mistake.This is because, when the switch is opened, battery can carry out charging energy-storing to capacitive load, and capacitive load is when the initial stage of charging, and the quantity of electric charge of storage is less, and electric current is comparatively large, and along with charging interval growth, when the quantity of electric charge of storage is more, electric current is less on the contrary.Therefore; when this battery protecting circuit is used for capacitive load; when battery protecting circuit detects the electric current that battery exports, just there will be load when just powering on, detect electric current comparatively large and make battery protecting circuit trigger protection; and then cut off the power supply that battery exports load to; but now, might not be that load occurs short circuit and causes electric current excessive, be likely the impact of capacitive load; therefore, existing this battery protecting circuit is adopted to there is the problem of protection by mistake.
Summary of the invention
Main purpose of the present invention is to provide a kind of battery protecting circuit, is intended to the problem avoiding battery protecting circuit false triggering, battery can accurately be protected injury-free when short circuit really appears in load simultaneously.
For achieving the above object, the battery protecting circuit that the present invention proposes comprises control device, switching device and checkout gear, the input of described switching device is connected with battery, and the output of described switching device is connected with load, and the controlled end of described switching device is connected with described control device; The input of described checkout gear is connected between described battery and switching device, and the output of described checkout gear is connected with described control device; Wherein, described control device comprises:
Control unit, detects for controlling described checkout gear the electric current that described battery exports load to, and compares with reference voltage level after being converted to the first corresponding magnitude of voltage; Also carry out cycling for controlling described checkout gear when switching device is opened;
First performance element, for when described first magnitude of voltage is greater than described reference voltage level, controls to open again after described switching device turns off Preset Time, then detect the first magnitude of voltage, control described switching device again when being greater than described reference voltage level and judge Preset Time, and this process that circulates; Also for when the cycling number of times of described checkout gear is greater than preset loop number of times, control described switching device and keep off state;
Second performance element, for when described first magnitude of voltage is less than or equal to described reference voltage level, controls described switching device and is held open state.
Preferably, described control unit, also for carrying out in the process of cycle detection at described checkout gear, if detect the magnitude of voltage that the current voltage value obtained is less than setting, and when the time that described checkout gear carries out cycling reaches Preset Time, control described switching device and open and be held open state.
Preferably, described control unit, also for carrying out in the process of cycle detection at the described checkout gear of control, detects the magnitude of voltage adjustment current reference magnitude of voltage obtained according to the last time.
Preferably; described battery protecting circuit also comprises the Failure elimination checkout gear being connected in parallel on described load two ends; described Failure elimination checkout gear is also electrically connected with the control unit of described control device; for detecting the impedance at described load two ends under the control of described control unit; and when the resistance value detected is greater than default resistance value; feed back a triggering signal, control described switching device to make described control unit and reopen.
Preferably, described checkout gear comprises sampling resistor and voltage comparator, and the first end of described sampling resistor is connected with described battery and described control unit, and the second end of described sampling resistor is connected with the input of described switching device; The positive input of described voltage comparator is connected with the second end of described sampling resistor, the reverse input end of described voltage comparator is connected with an output of described control device, and the output of described voltage comparator is connected with an input of described control device.
Preferably, described switching device comprises switching tube and switch driving circuit, the grid of described switching tube is connected with described control device through described switch driving circuit, and the source electrode of described switching tube is the input of described switching device, and the drain electrode of described switching tube is the output of described switching device.
The present invention also provides a kind of control method of battery protecting circuit, described battery protecting circuit comprises control device, switching device and checkout gear, the input of described switching device is connected with battery, the output of described switching device is connected with load, and the controlled end of described switching device is connected with described control device; The input of described checkout gear is connected between described battery and switching device, and the output of described checkout gear is connected with described control device; Wherein, the control method of described battery protecting circuit comprises:
Steps A, described control device controls described checkout gear and detects the electric current that described battery exports load to, and compares with reference voltage level after being converted to the first corresponding magnitude of voltage;
Step B, described control device is when described first magnitude of voltage is greater than described reference voltage level, control to open again after described switching device turns off Preset Time, and return the described steps A of execution, until when the cycling number of times of described checkout gear is greater than preset loop number of times, controls described switching device and keep off state;
Step C, described control device, when described first magnitude of voltage is less than or equal to described reference voltage level, controls described switching device and is held open state, and returns the described steps A of execution.
Preferably, described control device performs in the process of described steps A in circulation, if described checkout gear detects the magnitude of voltage that the current voltage value obtained is less than setting, and when the time that described checkout gear carries out cycling reaches Preset Time, control described switching device and open and be held open state.
Preferably, described steps A also comprises described control device and carries out at described checkout gear in the process of cycle detection, detects the magnitude of voltage adjustment current reference magnitude of voltage obtained according to the last time.
The present invention by arranging battery protecting circuit, and arranges the electric current that control unit control checkout gear detection battery exports load in the control device of this battery protecting circuit, and compares with reference voltage level after being converted to the first corresponding magnitude of voltage, and by arranging the first performance element when this first magnitude of voltage is greater than reference voltage level, control to open again after described switching device turns off Preset Time, and then control checkout gear by repeatedly cycle detection with after comparing confirmation, judge the whether real short circuit of load circuit, if repeatedly after cycle detection, first magnitude of voltage is still greater than reference voltage level, then can determine that short circuit appears in load circuit, if and the first magnitude of voltage is less than or equal to reference voltage level, then can determine that load circuit makes initial current larger, it is not the real short circuit of load circuit, like this, just achieve and judge the whether real short circuit of load circuit accurately, thus avoid this battery protecting circuit and occur the problem that false triggering is protected.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of battery protecting circuit preferred embodiment of the present invention;
Fig. 2 is the high-level schematic functional block diagram of the control device shown in Fig. 1 of the present invention;
Fig. 3 is the schematic flow sheet of control method one embodiment of battery protecting circuit of the present invention;
Fig. 4 is the schematic flow sheet of another embodiment of control method of battery protecting circuit of the present invention.
Drawing reference numeral illustrates:
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of battery protecting circuit, be applicable to various use battery as in the electronic equipment of power supply, when avoiding load short circuits, power supply continues powering load, and causes battery or load damage or safety problem.
With reference to Fig. 1, in one embodiment, this battery protecting circuit comprises control device 100, switching device 200 and checkout gear 300, the input of described switching device 200 is connected with battery 400, the output of described switching device 200 is connected with load 500, the controlled end of described switching device 200 is connected with described control device 100, described switching device 200 is when opening, control battery 400 output supply voltage to load 500, described switching device 200, when turning off, cuts off the supply voltage that described battery 400 exports load 500 to; The input of described checkout gear 300 is connected between described battery 400 and switching device 200, and the output of described checkout gear 300 is connected with described control device 100.
In the present embodiment, the bleeder circuit that described checkout gear 300 can adopt resistance to form and voltage comparator realize, or the current detecting chip of sampling specialty realizes, and in this preferred embodiment, the electric current that described checkout gear 300 realizes exporting to battery 400 load 500 by a sampling resistor R1 and voltage comparator U1 detects, wherein, the first end of described sampling resistor R1 is connected with described battery 400 and described control device 100, and second end of described sampling resistor R1 is connected with the input of described switching device; The supply voltage that this sampling resistor R1 is used for exporting to battery 400 load 500 carries out current sample; The positive input of described voltage comparator U1 is connected with second end of described sampling resistor R1, for input sample signal, the reverse input end of described voltage comparator U1 is connected with an output of described control device 100, in order to input described reference voltage, the output of described voltage comparator U1 is connected with an input of described control device 100, for exporting comparative result to control device 100.Understandablely be, when voltage comparator U1 exports high level signal, expression sampled voltage is greater than reference voltage, and (this reference voltage is not construed as limiting, can any value according to actual needs), represent that load 500 electric current is excessive, may there is short circuit in load circuit, need shutdown switch device 200, damages because electric current is excessive to avoid load 500 and battery 400.
In the present embodiment, described switching device 200 can adopt various electronic switch to realize, the switching circuit of such as triode composition or the switching circuit of metal-oxide-semiconductor composition, in preferably implementing one, described switching device 200 comprises switching tube M1 and switch driving circuit 201, the grid of described switching tube M1 is connected with described control device 100 through described switch driving circuit 201, the source electrode of described switching tube M1 is the input of described switching device 200, and the drain electrode of described switching tube M1 is the output of described switching device 200.Wherein, switching tube M1 is metal-oxide-semiconductor, improves the unlatching of switch and turns off efficiency.
With reference to Fig. 2, in the present embodiment, in order to avoid capacitive load 500 impact and this battery protecting circuit false triggering is protected, described control device 100 comprises control unit 101, first performance element 102 and the second performance element 103, particularly:
Described control unit 101, detects for controlling described checkout gear 300 electric current that described battery 400 exports load 500 to, and compares with reference voltage level after being converted to the first corresponding magnitude of voltage; Also carry out cycling for controlling described checkout gear 300 when switching device 200 is opened.
Described first performance element 102, for when described first magnitude of voltage is greater than described reference voltage level, controls to open again after described switching device 200 turns off Preset Time, then detect the first magnitude of voltage, when being greater than reference voltage level, control switch device judges Preset Time again, and this process that circulates; Also for when the cycling number of times of described checkout gear 300 is greater than preset loop number of times, control described switching device 200 and keep off state.
Described second performance element 103, for when described first magnitude of voltage is less than or equal to described reference voltage level, controls described switching device 200 and is held open state.
In this control device 100, when control unit 101 control switch device 200 is opened, checkout gear 300 will detect the electric current that battery 400 exports load 500 to, and is compare the current conversion detected with reference voltage level after corresponding the first magnitude of voltage, when described first magnitude of voltage is less than or equal to described reference voltage level, represents that short circuit does not appear in load circuit, control described switching device 200 and be held open state, load 500 is normally worked, and when described first magnitude of voltage is greater than described reference voltage level, represent that load circuit may occur short circuit, now control described switching device 200 to turn off, to protect battery 400, and open again after Preset Time, continue to power to load 500, and again detect, if the real short circuit of load circuit, no matter be then capacitive load 500 be also non-capacitive load 500, following cycle repeated detection to electric current substantially can not change, such current detecting result out necessarily the first magnitude of voltage is greater than reference voltage level, namely the real short circuit of circuit can be determined, at this time this battery protecting circuit triggers to protect battery, and this is effective protection.And if the inreal short circuit of load circuit, the electric current then detected for the first time is excessive is the impact being subject to capacitive load 500, and along with the growth in charging interval, the charge capacity of capacitive load 500 rises, namely the electric current detected also will gradually change along with the rising of capacitive load 500 charge capacity, and in reducing trend gradually, until capacitive load 500 is full of electricity, electric current tends towards stability, at this moment the voltage detected will lower than reference voltage, and then confirm that circuit does not have short circuit, maintained switch device 200 is opened, load 500 is normally worked, circuit protection circuit is trigger protection not, like this, the whether real short circuit of load circuit has been judged accurately by cycle detection and confirmation, this battery protecting circuit is made to there will not be false triggering.
It should be noted that, described control unit 101, also for carrying out in the process of cycling at described checkout gear 300, detecting the magnitude of voltage adjustment current reference magnitude of voltage obtained according to the last time.For the battery 400 of different inner core, because the internal resistance of battery 400 is different, also different on the impact of output current, the voltage and relative set reference value that obtain can be detected, to improve the fail safe of circuit protection by first time.
Be understandable that, battery protecting circuit of the present invention controls checkout gear 300 and detects by arranging control unit 101 in control device 100 electric current that battery 400 exports load 500 to, and compares with reference voltage level after being converted to the first corresponding magnitude of voltage, and by arranging the first performance element 102 when this first magnitude of voltage is greater than reference voltage level, control to open again after described switching device 200 turns off Preset Time, and then control checkout gear 300 by repeatedly cycle detection with after comparing confirmation, judge the whether real short circuit of load circuit, if repeatedly after cycle detection, first magnitude of voltage is still greater than reference voltage level, then can determine that short circuit appears in load circuit, if and the first magnitude of voltage is less than or equal to reference voltage level, then can determine that load circuit affects by capacitive load 500 and make initial current larger, it is not the real short circuit of load circuit, like this, circuit of the present invention just achieves judges the whether real short circuit of load circuit accurately, thus avoid this battery protecting circuit false triggering to protect.
Based on above-described embodiment, in a further embodiment, the efficiency of control is also improved by temporal judgement, particularly, described control unit 101, also for carrying out in the process of cycle detection at described checkout gear 300, if the current voltage value detecting acquisition is less than the magnitude of voltage of setting, and when the time that described checkout gear 300 carries out detecting reaches Preset Time, control described switching device 200 and open and be held open state.Be understandable that, for load 500, when not being real short circuit, circulation minority several times after, described checkout gear 300 would not detect the magnitude of voltage being greater than setting again, and needs to enter normal pattern, and is no longer in short-circuit detecting state; And in fact, as long as load circuit short circuit, short circuit current can be understood invariable, therefore, as long as find that the trend reduced appears in the electric current detected, just can determine load 500 and not occur short circuit, load 500 can power on and work always, opens without the need to removing loop control switch device 200 again and turns off and waste resource.
Further; described battery protecting circuit also comprises the Failure elimination checkout gear 600 being connected in parallel on described load 500 two ends; described Failure elimination checkout gear 600 is also electrically connected with the control unit 101 of described control device 100; for detecting the impedance at described load 500 two ends under the control of described control unit 101; and when the resistance value detected is greater than default resistance value; feed back a triggering signal, control described switching device 200 to make described control unit 101 and reopen.It should be noted that, after trouble hunting is good, disconnecting consumers, the impedance at now load 500 two ends levels off to infinity, when again opening, can normally work.When load circuit short circuit, the impedance at load 500 two ends is very little, therefore, by detecting the impedance variation at load 500 two ends, can determine load circuit and whether being in short trouble guard mode.
The present invention also provides a kind of control method of battery protecting circuit, and this control method realizes based on above-mentioned battery protecting circuit, and the particular circuit configurations of this battery protecting circuit and function, with reference to above-described embodiment, repeat no more herein.
With reference to Fig. 3, in one embodiment, the control method of described battery protecting circuit comprises:
Step S10, controls described checkout gear 300 and detects the electric current that described battery exports load 500 to, and is converted to the first corresponding magnitude of voltage;
Step S20, judges whether described first magnitude of voltage is greater than reference voltage level; If so, to performing step S30, if not, then step S40 is performed;
Described step S30, controls described switching device 200 and turns off;
Described step S31, judges whether the cycling number of times of described checkout gear 300 is greater than preset loop number of times; If so, to performing step S311, if not, then step S312 is performed;
Described step S311, controls described switching device 200 and keeps off state;
Described step S312, controls described switching device 200 and opens after Preset Time again, and returns the described step S10 of execution;
Step S40, when described first magnitude of voltage is less than or equal to described reference voltage level, controls described switching device 200 and is held open state, and returns the described step S10 of execution.
When control switch device 200 is opened, checkout gear 300 will detect the electric current that battery 400 exports load 500 to, and is compare the current conversion detected with reference voltage level after corresponding the first magnitude of voltage, when described first magnitude of voltage is less than or equal to described reference voltage level, represents that short circuit does not appear in load circuit, control described switching device 200 and be held open state, load 500 is normally worked, and when described first magnitude of voltage is greater than described reference voltage level, represent that load circuit may occur short circuit, now control described switching device 200 to turn off, to protect load 500 and battery 400, and open again after Preset Time, continue to power to load 500, and again detect, if the real short circuit of load circuit, no matter be then capacitive load 500 be also non-capacitive load 500, following cycle repeated detection to electric current substantially can not change, the result detected so necessarily the first magnitude of voltage is greater than reference voltage level, namely the real short circuit of circuit can be determined, at this time this battery protecting circuit triggers to protect battery, and this is effective protection.And if the inreal short circuit of load circuit, the electric current then detected for the first time is excessive is the impact being subject to capacitive load 500, and along with the growth in charging interval, the charge capacity of capacitive load 500 rises, namely the electric current detected also will gradually change along with the rising of capacitive load 500 charge capacity, and in reducing trend gradually, until capacitive load 500 is full of electricity, electric current tends towards stability, at this moment the voltage detected will lower than reference voltage, and then confirm that circuit does not have short circuit, maintained switch device 200 is opened, load 500 is normally worked, circuit protection circuit is trigger protection not, like this, the whether real short circuit of load circuit has been judged accurately by cycle detection and confirmation, this battery protecting circuit is made to there will not be false triggering.
It should be noted that, described step S10 also can be included in described checkout gear 300 and carry out in the process of cycle detection, detects the magnitude of voltage adjustment current reference magnitude of voltage obtained according to the last time.For the battery 400 of different inner cores, because the internal resistance of battery 400 is different, also different on the impact of output current, the voltage and relative set reference value that obtain can be detected, to improve the fail safe of circuit protection by first time.
Be understandable that, the control method of battery protecting circuit of the present invention by detecting at control checkout gear 300 electric current that battery 400 exports load 500 to, and compares with reference voltage level after being converted to the first corresponding magnitude of voltage, and when this first magnitude of voltage is greater than reference voltage level, control to open again after described switching device 200 turns off Preset Time, and then control checkout gear 300 by repeatedly cycle detection with after comparing confirmation, judge the whether real short circuit of load circuit, if repeatedly after cycle detection, first magnitude of voltage is still greater than reference voltage level, then can determine that short circuit appears in load circuit, if and the first magnitude of voltage is less than or equal to reference voltage level, then can determine that load circuit affects by capacitive load 500 and make initial current larger, it is not the real short circuit of load circuit, like this, just achieve and judge the whether real short circuit of load circuit accurately, thus avoid this battery protecting circuit false triggering to protect.
Based on above-described embodiment, in a further embodiment, also improved the efficiency of control by temporal judgement, particularly, with reference to Fig. 4, also comprise between execution described step S30 and step S31:
Step S32, judges whether the first magnitude of voltage that current detection obtains is less than last the first magnitude of voltage detecting acquisition; If so, then to performing step S33, if not, then returning and performing described step S10;
Described step S33, judges whether the time that described checkout gear 300 carries out cycling reaches Preset Time; If so, then to performing step S40, if not, then described step S31 is performed.
Be understandable that, for the capacitive load 500 that some chargings are slower, its whether real short circuit detected, the time of cost is also relatively long, because the speed that electric current declines slowly, after repeatedly cycle detection, electric current just may have significantly change and reach the reference voltage level of setting, so obvious waste resource; And in fact, as long as load circuit short circuit, short circuit current is invariable, therefore, as long as find that the trend reduced appears in the electric current detected, just can determine load 500 and not occur short circuit, load 500 can power on and work always, opens without the need to removing loop control switch device 200 again and turns off and waste resource.
Should be noted that; the technical scheme of each embodiment of the present invention can be combined with each other; but must be can be embodied as basis with those skilled in the art; when technical scheme combination occur conflicting maybe cannot realize time will be understood that the combination of this technical scheme does not exist, also not within the protection range of application claims.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a battery protecting circuit, it is characterized in that, comprise control device, switching device and checkout gear, the input of described switching device is connected with battery, the output of described switching device is connected with load, and the controlled end of described switching device is connected with described control device; The input of described checkout gear is connected between described battery and switching device, and the output of described checkout gear is connected with described control device; Wherein, described control device comprises:
Control unit, detects for controlling described checkout gear the electric current that described battery exports load to, and compares with reference voltage level after being converted to the first corresponding magnitude of voltage; Also carry out cycling for controlling described checkout gear when switching device is opened;
First performance element, for when described first magnitude of voltage is greater than described reference voltage level, controls to open again after described switching device turns off Preset Time, then detect the first magnitude of voltage, control described switching device again when being greater than described reference voltage level and judge Preset Time, and this process that circulates; Also for when the cycling number of times of described checkout gear is greater than preset loop number of times, control described switching device and keep off state;
Second performance element, for when described first magnitude of voltage is less than or equal to described reference voltage level, controls described switching device and is held open state.
2. battery protecting circuit as claimed in claim 1; it is characterized in that; described control unit; also for carrying out in the process of cycle detection at described checkout gear; if detect the magnitude of voltage that the current voltage value obtained is less than setting; and when the time that described checkout gear carries out cycling reaches Preset Time, control described switching device and open and be held open state.
3. battery protecting circuit as claimed in claim 1, is characterized in that, described control unit, also for carrying out in the process of cycle detection at the described checkout gear of control, detects the magnitude of voltage adjustment current reference magnitude of voltage obtained according to the last time.
4. battery protecting circuit as claimed in claim 1; it is characterized in that; described battery protecting circuit also comprises the Failure elimination checkout gear being connected in parallel on described load two ends; described Failure elimination checkout gear is also electrically connected with the control unit of described control device; for detecting the impedance at described load two ends under the control of described control unit; and when the resistance value detected is greater than default resistance value, feed back a triggering signal, control described switching device to make described control unit and reopen.
5. the battery protecting circuit as described in Claims 1-4 any one, it is characterized in that, described checkout gear comprises sampling resistor and voltage comparator, the first end of described sampling resistor is connected with described battery and described control unit, and the second end of described sampling resistor is connected with the input of described switching device; The positive input of described voltage comparator is connected with the second end of described sampling resistor, the reverse input end of described voltage comparator is connected with an output of described control device, and the output of described voltage comparator is connected with an input of described control device.
6. battery protecting circuit as claimed in claim 5; it is characterized in that; described switching device comprises switching tube and switch driving circuit; the grid of described switching tube is connected with described control device through described switch driving circuit; the source electrode of described switching tube is the input of described switching device, and the drain electrode of described switching tube is the output of described switching device.
7. the control method of a battery protecting circuit, it is characterized in that, described battery protecting circuit comprises control device, switching device and checkout gear, the input of described switching device is connected with battery, the output of described switching device is connected with load, and the controlled end of described switching device is connected with described control device; The input of described checkout gear is connected between described battery and switching device, and the output of described checkout gear is connected with described control device; Wherein, the control method of described battery protecting circuit comprises:
Steps A, described control device controls described checkout gear and detects the electric current that described battery exports load to, and compares with reference voltage level after being converted to the first corresponding magnitude of voltage;
Step B, described control device is when described first magnitude of voltage is greater than described reference voltage level, control to open again after described switching device turns off Preset Time, and return the described steps A of execution, until when the cycling number of times of described checkout gear is greater than preset loop number of times, controls described switching device and keep off state;
Step C, described control device, when described first magnitude of voltage is less than or equal to described reference voltage level, controls described switching device and is held open state, and returns the described steps A of execution.
8. the control method of battery protecting circuit as claimed in claim 7; it is characterized in that; described control device performs in the process of described steps A in circulation; if described checkout gear detects the magnitude of voltage that the current voltage value obtained is less than setting; and when the time that described checkout gear carries out cycling reaches Preset Time, control described switching device and open and be held open state.
9. the control method of battery protecting circuit as claimed in claim 7; it is characterized in that; described steps A also comprises described control device and carries out at described checkout gear in the process of cycle detection, detects the magnitude of voltage adjustment current reference magnitude of voltage obtained according to the last time.
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| CN201510648939.3A CN105244850B (en) | 2015-10-09 | 2015-10-09 | Battery protecting circuit and its control method |
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| CN106655101A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Household electrical appliance and over-current protection device and method of power factor corrector |
| CN106655102A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Power factor corrector over-current protection device and home appliance |
| CN107785968A (en) * | 2017-12-05 | 2018-03-09 | 广州金升阳科技有限公司 | The battery short circuit protection circuit of charge power supply |
| CN108051683A (en) * | 2017-12-26 | 2018-05-18 | 四川福润得数码科技有限责任公司 | A kind of load is switched in or out detection circuit and power supply power-supplying circuit and control method |
| CN108418197A (en) * | 2017-02-09 | 2018-08-17 | 埃伦贝格尔及珀恩斯根有限公司 | Method for running electric protection switch and electric protection switch |
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| CN109787314A (en) * | 2019-02-19 | 2019-05-21 | 惠州拓邦电气技术有限公司 | A kind of method, apparatus and product of BMS short-circuit protection |
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| CN112467814A (en) * | 2019-09-09 | 2021-03-09 | 宁波拓邦智能控制有限公司 | Battery pack discharge management method and system |
| CN114362092A (en) * | 2021-12-14 | 2022-04-15 | 深圳拓邦股份有限公司 | Load short-circuit protection circuit and electronic equipment |
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| CN106099838A (en) * | 2016-07-25 | 2016-11-09 | 贝兹维仪器(苏州)有限公司 | Connector for logging while drilling protection device based on sampling resistor |
| CN106655101A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Household electrical appliance and over-current protection device and method of power factor corrector |
| CN106655102A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Power factor corrector over-current protection device and home appliance |
| US10656215B2 (en) | 2016-11-07 | 2020-05-19 | Nissan Motor Co., Ltd. | Short circuit detection device |
| CN109863416A (en) * | 2016-11-07 | 2019-06-07 | 日产自动车株式会社 | Short-circuit detecting device |
| CN108418197A (en) * | 2017-02-09 | 2018-08-17 | 埃伦贝格尔及珀恩斯根有限公司 | Method for running electric protection switch and electric protection switch |
| CN108418197B (en) * | 2017-02-09 | 2019-09-03 | 埃伦贝格尔及珀恩斯根有限公司 | For running the method and electric protection switch of electric protection switch |
| CN108572319A (en) * | 2017-03-09 | 2018-09-25 | 深圳市三诺声智联股份有限公司 | Batteries in parallel connection set detecting device and method |
| CN107785968B (en) * | 2017-12-05 | 2024-02-13 | 广州金升阳科技有限公司 | Battery short-circuit protection circuit of charging power supply |
| CN107785968A (en) * | 2017-12-05 | 2018-03-09 | 广州金升阳科技有限公司 | The battery short circuit protection circuit of charge power supply |
| CN108051683A (en) * | 2017-12-26 | 2018-05-18 | 四川福润得数码科技有限责任公司 | A kind of load is switched in or out detection circuit and power supply power-supplying circuit and control method |
| WO2019132820A3 (en) * | 2017-12-26 | 2019-09-19 | Arcelik Anonim Sirketi | A battery control circuit |
| CN108051683B (en) * | 2017-12-26 | 2020-01-24 | 四川福润得数码科技有限责任公司 | Load connection or disconnection detection circuit, power supply control circuit and control method |
| CN109787314A (en) * | 2019-02-19 | 2019-05-21 | 惠州拓邦电气技术有限公司 | A kind of method, apparatus and product of BMS short-circuit protection |
| CN112467814B (en) * | 2019-09-09 | 2022-07-26 | 宁波拓邦智能控制有限公司 | Battery pack discharge management method and system |
| CN112467814A (en) * | 2019-09-09 | 2021-03-09 | 宁波拓邦智能控制有限公司 | Battery pack discharge management method and system |
| CN114362092A (en) * | 2021-12-14 | 2022-04-15 | 深圳拓邦股份有限公司 | Load short-circuit protection circuit and electronic equipment |
| CN114362092B (en) * | 2021-12-14 | 2024-06-07 | 深圳拓邦股份有限公司 | Load short-circuit protection circuit and electronic equipment |
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Denomination of invention: Battery protection circuit and control method thereof Effective date of registration: 20220829 Granted publication date: 20181026 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: SHENZHEN PACE ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2022440020179 |
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Address after: Room 758, 7th Floor, Block A and B, Xinghua Building, No. 2018 Shennan Middle Road, Fuqiang Community, Huaqiang North Street, Futian District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Peicheng Electronic Technology Co.,Ltd. Address before: 518000 Chegongmiao Tian'an Innovation Technology Plaza B1407-01, Futian District, Shenzhen City, Guangdong Province (office only) Patentee before: SHENZHEN PACE ELECTRONIC TECHNOLOGY CO.,LTD. |
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Date of cancellation: 20231127 Granted publication date: 20181026 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: SHENZHEN PACE ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2022440020179 |