CN105811495A - Safety protection apparatus of vehicular lithium battery - Google Patents
Safety protection apparatus of vehicular lithium battery Download PDFInfo
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- CN105811495A CN105811495A CN201610107348.XA CN201610107348A CN105811495A CN 105811495 A CN105811495 A CN 105811495A CN 201610107348 A CN201610107348 A CN 201610107348A CN 105811495 A CN105811495 A CN 105811495A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 78
- 239000000178 monomer Substances 0.000 claims abstract description 46
- 238000007599 discharging Methods 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H02J7/0026—
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a safety protection apparatus of a vehicular lithium battery. The apparatus comprises a monomer cell equalization module, a monomer cell voltage detection module, a current detection module, a power switch driving module, a short-circuit protection module, a power switch module and a current feedback control module. The safety protection apparatus of the vehicular lithium battery can realize such functions as monomer equalization, overvoltage protection, undervotlage protection, overcurrent protection, short-circuit protection and the like on a vehicular starting type lithium battery and solves the conflict of sudden voltage drop caused by undervoltage protection and heavy-current discharge through current feedback control.
Description
Technical field
The present invention relates to the battery protection technical field of lithium battery, especially with regard to the battery protecting apparatus of a kind of automobile-used actuated type lithium battery.
Background technology
In recent years, lithium battery is increasingly being applied to automobile starting battery, replaces traditional lead-acid accumulator.Automobile-used actuated type lithium battery is the power supply of automobile starting motor, is also the power supply of automobile often electricity.High output and big electric current should be to provide at automobile starting, in usually using, provide low output and small area analysis again.For ensure lithium battery safe handling, increase the service life, lithium battery all with protection device, have equilibrium, overvoltage, under-voltage, cross stream, short circuit etc. defencive function.During automobile start, lithium battery heavy-current discharge, generally can arrive 300A-400A, transient current peak value can arrive 1000A, and now, cell voltage can suddenly decline, and after automobile starting, cell voltage can recover again normal.Common li-ion cell protection system produces erroneous judgement because of the suddenly decline of cell voltage, starts under-voltage protection function, so that battery cannot continue electric discharge.This design being lithium cell protecting device proposes a challenge: actuated type lithium battery High-current output causes cell voltage suddenly to decline and there is contradiction between battery under-voltage protection.
At present, most automobile-used actuated type lithium cell protecting device eliminates under-voltage protection function, and this is highly unwanted to the use of lithium battery; in normal use procedure; if the frequent overdischarge of lithium battery and can not get effective protection, can accelerate the aging of lithium battery, reduce service life；The automobile-used actuated type lithium cell protecting device of part have employed battery management system to monitor discharge current, so can improve battery protecting apparatus cost, and meanwhile, battery management system also relatively larger from power consumption, the time one is long, can significantly consume the energy of battery.
Summary of the invention
It is an object of the invention to provide the safety guard of a kind of vehicle lithium battery; automobile-used actuated type lithium battery can be realized the functions such as monomer equilibrium, overvoltage protection, under-voltage protection, overcurrent protection, short-circuit protection by it, solves under-voltage protection and heavy-current discharge by Current Feedback Control and causes the precipitate conflict of voltage.
For achieving the above object; the technical scheme is that the safety guard designing a kind of vehicle lithium battery, including cell balance module, monomer battery voltage detection module, current detection module, power switch drive module, short circuit protection module, power switching modules, Current Feedback Control module；
Each piece of cell of composition battery bag is carried out equilibrium by described cell balance module, battery is made to wrap under fully charged state, keeping less voltage difference between every piece of cell, thus ensureing the concordance of cell in battery bag, increasing the service life；Cell balance module is passive balance module, when in set of cells, the voltage of certain block battery is more than the equalizing voltage threshold value set, monomer battery voltage detection module sends equalization instruction to cell balance module, cell balance module opens the equalizing circuit of correspondence, is consumed the energy of corresponding cell by the mode of resistance heating；
Described monomer battery voltage detection module; the voltage of cell in its monitoring battery bag; when the voltage of cell reaches the entry condition of overvoltage protection, under-voltage protection, monomer equilibrium, monomer battery voltage detection module exports the control signal of corresponding overvoltage protection, under-voltage protection or equalizing voltage；
Described current detection module is furnished with current sensor, current detection module is by the charging and discharging electric current of current sensor monitoring battery bag, when the electric current of battery bag reaches the threshold value of heavy-current discharge, current detection module output heavy-current discharge characteristic signal, with the battery under-voltage signal suppressing monomer battery voltage detection module to export；When the electric current of battery bag reached the threshold value banishing electricity, the control signal of current detection module output overcurrent protection；
Described power switch drive module; it is the driver element of power switching modules; it receives the control signal from monomer battery voltage detection module, current detection module and Current Feedback Control module; power switching modules is controlled, realizes by opening or close power switching modules the overvoltage protection of battery bag, under-voltage protection, overcurrent protection are controlled；
Described short circuit protection module, it passes through the voltage detecting power switching modules two ends to detect the whether short-circuit of battery bag power supply circuits, when battery bag power supply circuits short circuit, to power switching modules output short circuit protection control signal；
Described power switching modules, it receives the control signal from power switch drive module and short circuit protection module, and the break-make of the power supply circuits of battery bag is controlled, thus realizing the overvoltage protection of battery bag, under-voltage protection, overcurrent protection, short-circuit protection；
Described Current Feedback Control module receives the battery under-voltage signal from monomer battery voltage detection module and the heavy-current discharge characteristic signal from current detection module; when receiving heavy-current discharge characteristic signal; suppress battery under-voltage signal; make not start under-voltage protection during set of cells heavy-current discharge; under-voltage protection normal operation during low discharging current, solves under-voltage protection and heavy-current discharge and causes the precipitate conflict of voltage.
Preferably, the voltage of each piece of cell of described monomer battery voltage detection module detection internal battery pack, it is provided with three threshold values inside monomer battery voltage detection module:
1) when in set of cells, the voltage of one piece or several pieces of cells is more than the threshold value of equalizing voltage, monomer battery voltage detection module exports corresponding equalizing voltage control signal to cell balance module, to open and above-mentioned one piece or equalizing circuit corresponding to several pieces of batteries, above-mentioned one piece or several pieces of batteries are discharged；
2) when in set of cells, the voltage of one piece or several pieces of cells is more than the threshold value of overvoltage protection voltage, monomer battery voltage detection module exports corresponding overvoltage protection control signal to power switch drive module；
3) when in set of cells, the voltage of one piece or several pieces of cells is less than the threshold value of under-voltage protection voltage, monomer battery voltage detection module exports corresponding under-voltage protection control signal to Current Feedback Control module.
Preferably, described current detection module is furnished with current sensor, current sensor is for detecting the electric current of battery bag power supply circuits, and convert electrical current into the voltage signal of correspondence, current detection module gathers the voltage signal of current sensor, and current detection module is by the charging and discharging electric current of current sensor monitoring battery bag；Current sensor is inspection leakage resistance or Hall current sensor；Two threshold values it are provided with inside described current detection module:
1) when the electric current of battery bag is more than the Current Feedback Control threshold value set, corresponding heavy-current discharge characteristic signal is exported to Current Feedback Control module, with the battery under-voltage signal suppressing monomer battery voltage detection module to export；
2) when battery pack current controls threshold value more than the output overcurrent set, control instruction is protected to power switch drive module output overcurrent.
Preferably, when current sensor adopts inspection leakage resistance, current detection module also includes signal filtering and amplifying circuit.
Preferably, when current sensor adopts Hall current sensor, current detection module also includes voltage conversion circuit.
Preferably, the safety guard of described vehicle lithium battery, it is powered by battery bag.
Advantages of the present invention and having the beneficial effects that: the safety guard of a kind of vehicle lithium battery is provided; automobile-used actuated type lithium battery can be realized the functions such as monomer equilibrium, overvoltage protection, under-voltage protection, overcurrent protection, short-circuit protection by it, solves under-voltage protection and heavy-current discharge by Current Feedback Control and causes the precipitate conflict of voltage.
The present invention has lower feature:
1, automobile-used actuated type lithium battery can be realized the functions such as monomer equilibrium, overvoltage protection, under-voltage protection, overcurrent protection, short-circuit protection by apparatus of the present invention.
2, apparatus of the present invention Current Feedback Control solves under-voltage protection and heavy-current discharge and causes the precipitate conflict of voltage.
3, present invention can be widely used to various automobile starting type lithium cell protecting device.
Accompanying drawing explanation
Fig. 1It it is the system composition signal of the present inventionFigure；
Fig. 2It it is Current Feedback Control signalFigure。
Detailed description of the invention
Below in conjunction withAccompanying drawingAnd embodiment, the specific embodiment of the present invention is further described.Following example are only for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
The technical scheme that the present invention is embodied as is:
Such as Fig. 1Shown in, the safety guard of vehicle lithium battery of the present invention includes cell balance module 1, monomer battery voltage detection module 2, current detection module 3, power switch drive module 4, power switching modules 5, short circuit protection module 6, Current Feedback Control module 7.Battery system also includes load 8, set of cells 9.The safety guard of vehicle lithium battery of the present invention is powered by battery bag 9.
Each piece of cell of composition battery bag 9 is carried out equilibrium by described cell balance module 1, make battery bag 9 under fully charged state, keeping less voltage difference between every piece of cell, thus ensureing the concordance of cell in battery bag 9, increasing the service life；Cell balance module 1 is passive balance module, when in set of cells 9, the voltage of certain block battery is more than the equalizing voltage threshold value set, monomer battery voltage detection module 2 sends equalization instruction to cell balance module 1, cell balance module 1 opens the equalizing circuit of correspondence, is consumed the energy of corresponding cell by the mode of resistance heating.
Described monomer battery voltage detection module 2 detects the voltage of each piece of cell within set of cells 9, and monomer battery voltage detection module 2 is internal is provided with three threshold values:
1) when in set of cells 9, the voltage of one piece or several pieces of cells is more than the threshold value of equalizing voltage, monomer battery voltage detection module 2 exports corresponding equalizing voltage control signal to cell balance module 1, to open and above-mentioned one piece or equalizing circuit corresponding to several pieces of batteries, above-mentioned one piece or several pieces of batteries are discharged；
2) when in set of cells 9, the voltage of one piece or several pieces of cells is more than the threshold value of overvoltage protection voltage, monomer battery voltage detection module 2 exports corresponding overvoltage protection control signal to power switch drive module 4；
3) when in set of cells 9, the voltage of one piece or several pieces of cells is less than the threshold value of under-voltage protection voltage, monomer battery voltage detection module 2 exports corresponding under-voltage protection control signal to Current Feedback Control module 7.
Described current detection module 3 is furnished with current sensor 31, current sensor 31 is for detecting the electric current of battery bag power supply circuits, and convert electrical current into the voltage signal of correspondence, current detection module 3 gathers the voltage signal of current sensor 31, and current detection module 3 monitors the charging and discharging electric current of battery bag 9 by current sensor 31；Current sensor 31 is inspection leakage resistance or Hall current sensor；When current sensor 31 adopts inspection leakage resistance, current detection module 3 also includes signal filtering and amplifying circuit；When current sensor 31 adopts Hall current sensor, current detection module 3 also includes voltage conversion circuit；Described current detection module 3 is internal is provided with two threshold values:
1) when the electric current of battery bag 9 is more than the Current Feedback Control threshold value set, corresponding heavy-current discharge characteristic signal is exported to Current Feedback Control module 7, with the battery under-voltage signal suppressing monomer battery voltage detection module 2 to export；
2) when battery bag 9 electric current controls threshold value more than the output overcurrent set, control instruction is protected to power switch drive module 4 output overcurrent.
Described power switch drive module 4; it is the driver element of power switching modules 5; it receives the control signal from monomer battery voltage detection module 2, current detection module 3 and Current Feedback Control module 7; power switching modules 5 is controlled, realizes by opening or close power switching modules 5 overvoltage protection of battery bag 9, under-voltage protection, overcurrent protection are controlled.
Described short circuit protection module 6, it passes through the voltage detecting power switching modules 5 two ends to detect the whether short-circuit of battery bag power supply circuits, when battery bag power supply circuits short circuit, to power switching modules 5 output short circuit protection control signal.
Described power switching modules 5, it receives the control signal from power switch drive module 4 and short circuit protection module 6, and the break-make of the power supply circuits of battery bag is controlled, thus realizing the overvoltage protection of battery bag, under-voltage protection, overcurrent protection.
Described Current Feedback Control module 7 receives the battery under-voltage signal from monomer battery voltage detection module 2 and the heavy-current discharge characteristic signal from current detection module 3; when receiving heavy-current discharge characteristic signal; suppress battery under-voltage signal; make not start under-voltage protection during set of cells 9 heavy-current discharge; under-voltage protection normal operation during low discharging current, solves under-voltage protection and heavy-current discharge and causes the precipitate conflict of voltage.
Load 8, set of cells 9 are to cooperate with the essential element of battery protecting apparatus normal operation.
Such as Fig. 2Shown in, Current Feedback Control module 7 has techniques below feature, it is ensured that under-voltage protection energy normal operation:
1) VCC74 is power supply, and generally switch 76 is for normally open, and under-voltage control signal output 75 is low level；
2) when one or a few battery undervoltage of certain in set of cells 9, and set of cells 9 discharge current less than Current Feedback Control threshold value time, monomer battery voltage detection module 2 inputs 72 by under-voltage signal and exports high level to the comparator 71 of Current Feedback Control module 7, now, switch 76 conducting, under-voltage control signal output 75 is high level；
3) when one or a few battery undervoltage of certain in set of cells 9; and set of cells 9 discharge current more than Current Feedback Control threshold value time; monomer battery voltage detection module 2 inputs 72 by under-voltage signal and exports high level to the comparator 71 of Current Feedback Control module 7; simultaneously; current detection module 3 exports high level by High-current output signal input 72 to the comparator 71 of Current Feedback Control module 7; now; switch 76 shutoff; under-voltage control signal output 75 is low level, and under-voltage protection is shielded.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (6)
1. the safety guard of vehicle lithium battery, it is characterised in that include cell balance module, monomer battery voltage detection module, current detection module, power switch drive module, short circuit protection module, power switching modules, Current Feedback Control module；
Each piece of cell of composition battery bag is carried out equilibrium by described cell balance module, battery is made to wrap under fully charged state, keeping less voltage difference between every piece of cell, thus ensureing the concordance of cell in battery bag, increasing the service life；Cell balance module is passive balance module, when in set of cells, the voltage of certain block battery is more than the equalizing voltage threshold value set, monomer battery voltage detection module sends equalization instruction to cell balance module, cell balance module opens the equalizing circuit of correspondence, is consumed the energy of corresponding cell by the mode of resistance heating；
Described monomer battery voltage detection module; the voltage of cell in its monitoring battery bag; when the voltage of cell reaches the entry condition of overvoltage protection, under-voltage protection, monomer equilibrium, monomer battery voltage detection module exports the control signal of corresponding overvoltage protection, under-voltage protection or equalizing voltage；
Described current detection module is furnished with current sensor, current detection module is by the charging and discharging electric current of current sensor monitoring battery bag, when the electric current of battery bag reaches the threshold value of heavy-current discharge, current detection module output heavy-current discharge characteristic signal, with the battery under-voltage signal suppressing monomer battery voltage detection module to export；When the electric current of battery bag reached the threshold value banishing electricity, the control signal of current detection module output overcurrent protection；
Described power switch drive module; it is the driver element of power switching modules; it receives the control signal from monomer battery voltage detection module, current detection module and Current Feedback Control module; power switching modules is controlled, realizes by opening or close power switching modules the overvoltage protection of battery bag, under-voltage protection, overcurrent protection are controlled；
Described short circuit protection module, it passes through the voltage detecting power switching modules two ends to detect the whether short-circuit of battery bag power supply circuits, when battery bag power supply circuits short circuit, to power switching modules output short circuit protection control signal；
Described power switching modules, it receives the control signal from power switch drive module and short circuit protection module, and the break-make of the power supply circuits of battery bag is controlled, thus realizing the overvoltage protection of battery bag, under-voltage protection, overcurrent protection, short-circuit protection；
Described Current Feedback Control module receives the battery under-voltage signal from monomer battery voltage detection module and the heavy-current discharge characteristic signal from current detection module; when receiving heavy-current discharge characteristic signal; suppress battery under-voltage signal; make not start under-voltage protection during set of cells heavy-current discharge, under-voltage protection normal operation during low discharging current.
2. the safety guard of vehicle lithium battery according to claim 1, it is characterised in that the voltage of each piece of cell of described monomer battery voltage detection module detection internal battery pack, is provided with three threshold values inside monomer battery voltage detection module:
1) when in set of cells, the voltage of one piece or several pieces of cells is more than the threshold value of equalizing voltage, monomer battery voltage detection module exports corresponding equalizing voltage control signal to cell balance module, to open and above-mentioned one piece or equalizing circuit corresponding to several pieces of batteries, above-mentioned one piece or several pieces of batteries are discharged；
2) when in set of cells, the voltage of one piece or several pieces of cells is more than the threshold value of overvoltage protection voltage, monomer battery voltage detection module exports corresponding overvoltage protection control signal to power switch drive module；
3) when in set of cells, the voltage of one piece or several pieces of cells is less than the threshold value of under-voltage protection voltage, monomer battery voltage detection module exports corresponding under-voltage protection control signal to Current Feedback Control module.
3. the safety guard of vehicle lithium battery according to claim 2; it is characterized in that; described current detection module is furnished with current sensor; current sensor is for detecting the electric current of battery bag power supply circuits; and convert electrical current into the voltage signal of correspondence; current detection module gathers the voltage signal of current sensor, and current detection module is by the charging and discharging electric current of current sensor monitoring battery bag；Current sensor is inspection leakage resistance or Hall current sensor；Two threshold values it are provided with inside described current detection module:
1) when the electric current of battery bag is more than the Current Feedback Control threshold value set, corresponding heavy-current discharge characteristic signal is exported to Current Feedback Control module, with the battery under-voltage signal suppressing monomer battery voltage detection module to export；
2) when battery pack current controls threshold value more than the output overcurrent set, control instruction is protected to power switch drive module output overcurrent.
4. the safety guard of vehicle lithium battery according to claim 3, it is characterised in that when current sensor adopts inspection leakage resistance, current detection module also includes signal filtering and amplifying circuit.
5. the safety guard of vehicle lithium battery according to claim 3, it is characterised in that when current sensor adopts Hall current sensor, current detection module also includes voltage conversion circuit.
6. the safety guard of the vehicle lithium battery according to claim 4 or 5, it is characterised in that it is powered by battery bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610107348.XA CN105811495A (en) | 2016-02-26 | 2016-02-26 | Safety protection apparatus of vehicular lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610107348.XA CN105811495A (en) | 2016-02-26 | 2016-02-26 | Safety protection apparatus of vehicular lithium battery |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655107A (en) * | 2017-01-20 | 2017-05-10 | 深圳市木村机电有限公司 | High power lithium battery protector |
| CN107248725A (en) * | 2017-05-11 | 2017-10-13 | 南京中感微电子有限公司 | A kind of battery protecting circuit and system |
| CN108666980A (en) * | 2018-04-10 | 2018-10-16 | 上海空间电源研究所 | A kind of discharge fault integration protection circuit |
| CN109347194A (en) * | 2018-12-10 | 2019-02-15 | 湖南亿福照明科技有限公司 | The base station 5G and its power supply system |
| CN110011339A (en) * | 2019-05-07 | 2019-07-12 | 江苏吉意信息技术有限公司 | Accumulation power supply protection and operation control system and method |
| CN110671787A (en) * | 2019-10-18 | 2020-01-10 | 珠海格力电器股份有限公司 | Protection device, air conditioning system and protection method thereof |
| EP3790139A1 (en) | 2019-09-03 | 2021-03-10 | ABB Schweiz AG | Battery management and protection system |
| CN113353010A (en) * | 2021-07-05 | 2021-09-07 | 上海广为美线电源电器有限公司 | System and method capable of recording starting times of emergency starting power supply |
| CN114089651A (en) * | 2021-09-30 | 2022-02-25 | 双登集团股份有限公司 | Voltage type abnormal protection mode |
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| US20090128094A1 (en) * | 2007-11-16 | 2009-05-21 | Tadashi Okuto | Alarm-including protection apparatus for lithium-ion battery and method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655107A (en) * | 2017-01-20 | 2017-05-10 | 深圳市木村机电有限公司 | High power lithium battery protector |
| CN107248725A (en) * | 2017-05-11 | 2017-10-13 | 南京中感微电子有限公司 | A kind of battery protecting circuit and system |
| CN108666980A (en) * | 2018-04-10 | 2018-10-16 | 上海空间电源研究所 | A kind of discharge fault integration protection circuit |
| CN109347194A (en) * | 2018-12-10 | 2019-02-15 | 湖南亿福照明科技有限公司 | The base station 5G and its power supply system |
| CN110011339A (en) * | 2019-05-07 | 2019-07-12 | 江苏吉意信息技术有限公司 | Accumulation power supply protection and operation control system and method |
| EP3790139A1 (en) | 2019-09-03 | 2021-03-10 | ABB Schweiz AG | Battery management and protection system |
| CN110671787A (en) * | 2019-10-18 | 2020-01-10 | 珠海格力电器股份有限公司 | Protection device, air conditioning system and protection method thereof |
| CN113353010A (en) * | 2021-07-05 | 2021-09-07 | 上海广为美线电源电器有限公司 | System and method capable of recording starting times of emergency starting power supply |
| CN114089651A (en) * | 2021-09-30 | 2022-02-25 | 双登集团股份有限公司 | Voltage type abnormal protection mode |
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Application publication date: 20160727 |
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