CN201360156Y - Charging and discharging management system for improving safety and service life of series-connected battery set - Google Patents

Charging and discharging management system for improving safety and service life of series-connected battery set Download PDF

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Publication number
CN201360156Y
CN201360156Y CNU2008201778867U CN200820177886U CN201360156Y CN 201360156 Y CN201360156 Y CN 201360156Y CN U2008201778867 U CNU2008201778867 U CN U2008201778867U CN 200820177886 U CN200820177886 U CN 200820177886U CN 201360156 Y CN201360156 Y CN 201360156Y
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charging
battery
cell
circuit
chip microcomputer
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CNU2008201778867U
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Chinese (zh)
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赵建和
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赵建和
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

A charging and discharging management system for improving the safety and service life of a series-connected battery set detects and records the parameters of batteries, such as charge quantity, terminal voltage and internal resistance, in the process of charging, calculates the variable quantity and variation rate of each parameter, compares the parameters with the preset initial parameters to judge the variation degree of the charging performance of the batteries, prewarns the possible safety problems of the batteries, and charges each single battery with low terminal voltage by the way of current-compensating equalization in the process of charging in order to reduce the state difference of each single battery and prolong the service life of the battery set. The charging and discharging management system avoids the 'heating' problem of the shunting equalization technology, and is applicable to large-capacity, high-power battery sets.

Description

A kind of management of charging and discharging device that improves series battery fail safe and life-span
Affiliated technical field
The utility model relates to a kind of series battery management of charging and discharging device, particularly adopts a kind of management of charging and discharging device that improves series battery fail safe and life-span of single-chip microcomputer (single chipmicrocomputer) control.
Background technology
Series connection lithium rechargeable batteries group is widely used in electric automobile, electric bicycle, electric tool etc.The rechargeable battery set of series connection, particularly big capacity, powerful series battery, the safety management of charging and discharge process and control are very important, not only are related to the Acceptable life of battery, more are related to the safety of battery supply set and user's personal safety.
CN101039039A has announced a kind of batteries charging balancing management system, its method of work is to the series battery charge that connects the time, detect the terminal voltage of each cell in the battery pack, when the terminal voltage of certain cell is higher, by the equalizing circuit in parallel with this cell to the shunting of charging of this battery, lower the charging rate and the terminal voltage rate of climb of this cell, make each cell terminal voltage be tending towards balanced consistent, avoid life-span because of the differentia influence battery pack of the charge-discharge characteristic of each cell in the series battery with this.Because the equalizing circuit in parallel with cell consumes the part rechargeable electrical energy when the charging shunting, the equalizing circuit heating, the ability of equalization of equalizing circuit is restricted.For big capacity, high power battery, during large current charge, the equalizing circuit ability of equalization can not satisfy actual needs.
In the later stage in life-span of rechargeable battery, the inside battery performance is deterioration gradually, and the internal resistance of cell raises, and battery can seriously generate heat in charging and the discharge process, even blast.Though series battery charge that the crowd knows and discharge administrative skill can be cut off external charging or discharge path when battery temperature raises unusually, but this moment, battery itself was in unsafe condition, cut off the charge or discharge path and can not stop the unusual electrochemical reaction process of inside battery, the danger that battery continues heating even blast still exists.When battery temperature raises unusually, cut off discharge path suddenly, the equipment for needs are powered continuously as electric automobile, may cause the safety problem of equipment operation.
Studies show that, increase with battery charge-discharge cycles number of times, battery capacity descends, the internal resistance of battery increases, the inside battery performance degradation is a process that builds up until the final process that thoroughly lost efficacy, parameters such as internal resistance by measuring battery in each charging process and voltage, electric current, capacity, and variable quantity, the pace of change of each parameter be analyzed, judge the degree of inside battery performance degradation, can give early warning battery life and the safety problem that may occur.
The utility model content
The utility model proposes a kind of management of charging and discharging device that improves series battery fail safe and life-span; this device is the control core with the single-chip microcomputer; detect the various parameters of charging and discharge process; the voltage, electric current and the electric weight that comprise terminal voltage, temperature and the battery pack of each cell in the series battery; the parameter that records is analyzed, control is implemented in charging and discharge process, realize the protection of charging and final discharging voltage according to the result who analyzes; temperature protection, overcurrent protection.In charging process, by the lower cell of terminal voltage being carried out the method for feeder current, make the balanced unanimity of each cell terminal voltage in the series battery, avoid owing to of the life-span influence of each cell property difference battery pack.This device reaches charging and finishes terminal voltage, terminal voltage climbing speed, charging current, charge volume and the internal resistance of cell that each cell in the battery pack was measured and write down in the back before each charging process, in the charging process, and measure when charging before and the parameter of record compares, the variable quantity of the charge volume of analysis battery pack and the internal resistance of each cell, terminal voltage, terminal voltage climbing speed, judge inside battery the performance process and the degree of deterioration gradually, the inefficacy of battery and the safety problem that may occur are given early warning.
The technical scheme that its technical problem that solves the utility model adopts is: be the influence to the battery pack life-span of the property difference that reduces cell, the safety problem that may occur battery pack gives early warning.In memory, store internal resistance initial value and the error permissible value of each cell under different terminal voltages in advance; each cell is at the terminal voltage climbing speed and the error permissible value of different terminal voltage sections in the charging process; accumulative total charge volume predetermined value; charge voltage range; discharge voltage range; charging cut-ff voltage value; the discharge cut-off voltage value; the battery temperature scope; charging current value and battery charging current error permissible value; discharging current protection value; balanced starting resistor value; parameters such as terminal voltage imbalance values.Single-chip microcomputer detects the electrical quantity of each cell in series battery and the series battery in charging process, judges battery status, and the control charging process is implemented the feeder current equalizing charge to the cell that terminal voltage is lower.In the discharge process, detect the discharging current of terminal voltage, temperature and the battery pack of each cell, implement discharge overcurrent protection, discharge temp protection and discharge under-voltage protection.
Single-chip microcomputer is connected with electric quantity metering circuit, photoelectric isolating circuit, indicating circuit, charge switch, discharge switch with selector switch, temperature sensor, memory, A/D change-over circuit, detection gating circuit, balanced gating circuit, current detecting, the A/D change-over circuit is connected with the detection gating circuit, and the input of voltage detecting circuit is connected to the positive and negative electrode of measured cell.Photoelectric isolating circuit is connected with charging control circuit, balancing control circuit.Selector switch uses 3 band switches of duplex, selects the charge or discharge process.
During charging, referring to Fig. 1, selector switch is dialled to " charging ", and single-chip microcomputer works on power, and detects selector switch by the line with selector switch and be in " charging " position, and single-chip microcomputer is carried out charging control program, and the method for charging control is:
1) single-chip microcomputer clear " balanced sign " is 0,
2) single-chip microcomputer is by detecting the terminal voltage that gating circuit, A/D change-over circuit and voltage detecting circuit detect each cell, detect the temperature of each cell by temperature sensor, the terminal voltage of each cell and temperature are all in charge voltage range and battery temperature scope, single-chip microcomputer is carried out next step, otherwise, single-chip microcomputer sends signal to indicating circuit, prompting voltage or temperature anomaly.
3) single-chip microcomputer detects the internal resistance of each cell, and concrete grammar is: single-chip microcomputer detects the terminal voltage U11 of each cell, U12 ... U1N and the electric current I 1 by current detecting and the current battery pack of electric quantity metering electric circuit inspection are stored in the memory.Single-chip microcomputer is according to the terminal voltage sum of each cell, the output voltage of charge power supply is set through photoelectric isolating circuit and charging control circuit, and send " closure " signal to charge switch, detect the terminal voltage U21 of each cell once more, U22 ... after the electric current I 2 of U2N and battery pack, send " disconnection " signal to charge switch, turn-off charging current.Calculate the internal resistance of each cell by following formula.
R i=(U 2i-U 1i)/(I 2-I 1)
In the internal resistance of each cell that single-chip microcomputer will calculate and the memory in advance the internal resistance initial value of each cell of storage compare, difference surpasses predetermined error permissible value, single-chip microcomputer sends signal to indicating circuit, the prompting internal resistance is unusual.Otherwise, the internal resistance value of this each cell that records is stored in the memory, carry out next step.
4) single-chip microcomputer sends " closure " signal to charge switch, opens charging, and when starting chargometer and the charge volume metering, carries out next step.
5) the single-chip microcomputer terminal voltage that detects and store each cell, the terminal voltage of each cell does not all reach the charging cut-ff voltage that presets, and carries out the 8th) step.Otherwise single-chip microcomputer sends " disconnection " signal to charge switch, stops charging.According to the 3rd) go on foot the internal resistance that said method is measured each cell, the result is stored in the memory, compare with the internal resistance initial value of each cell of storing in advance in the memory, difference surpasses setting, carries out the 7th) step, otherwise, carry out next step.
6) internal resistance value of each cell that this is recorded is stored in the memory, single-chip microcomputer reads this charge volume in current detecting and the electric quantity metering circuit, calculate the accumulative total charge volume, be stored in the memory, the accumulative total charge volume reaches accumulative total charge volume predetermined value, then sends " life-span warning " signal to indicating circuit.
7) single-chip microcomputer sends signal to indicating circuit, and the prompting internal resistance is unusual.And send " charging is finished " signal to indicating circuit.
8) single-chip microcomputer calculates the terminal voltage climbing speed of each cell in 10 minutes, read in the charging process that presets in the memory each cell at the terminal voltage climbing speed of different terminal voltage sections, and calculate the difference of the actual terminal voltage climbing speed of each cell and the terminal voltage climbing speed that presets, the difference of each cell terminal voltage climbing speed all in the battery terminal voltage climbing speed error range that presets, is then carried out next step.Otherwise single-chip microcomputer sends " disconnection " signal to charge switch, stops charging, and sends " the terminal voltage climbing speed is unusual " signal to indicating circuit.
9) single-chip microcomputer sorts to the terminal voltage of each cell, calculate the difference of the highest terminal voltage and minimum terminal voltage, this difference is greater than predetermined terminal voltage imbalance values, then single-chip microcomputer sends " disconnection " signal to charge switch, stop charging, and send " voltage mismatch " signal to indicating circuit; Otherwise, carry out next step.
10) single-chip microcomputer detects " balanced sign ", and " balanced sign "=0 carries out the 11st) step, otherwise, carry out the 12nd) step.
11) single-chip microcomputer calculates the difference of the highest terminal voltage and minimum terminal voltage.This difference then carries out the 12nd less than the balanced starting resistor value of regulation) step.Otherwise single-chip microcomputer sends signal through photoelectric isolating circuit to balancing control circuit, the output current of balanced power supply is set, and the numbering of the cell that terminal voltage is minimum sends to balanced gating circuit, balanced gating circuit sends " closure " signal according to the numbering of the cell of receiving to the equalizer switch that links to each other with this numbering cell, and balanced power supply carries out balanced feeder current charging to this numbering cell.The numbering that single-chip microcomputer is provided with " balanced sign "=1 and preserves the cell of balanced gating.Carry out the 13rd) step.
12) single-chip microcomputer calculates balanced gating circuit just in the terminal voltage of the cell of gating and the difference of each cell most significant end voltage.This difference is for just, and then single-chip microcomputer sends " disconnection " signal to balanced gating circuit, and balanced gating circuit is controlled all equalizer switches and disconnected, and stops equalizing charge, and clear " balanced sign "=0; Otherwise, carry out next step.
13) single-chip microcomputer reads the current charging current in current detecting and the electric quantity metering circuit, and compare with the charging current value that presets, difference is greater than the battery charging current error permissible value of regulation, and then single-chip microcomputer is oppositely adjusted the output voltage of charge power supply through photoelectric isolating circuit and charging control circuit.Otherwise carry out next step.
14) single-chip microcomputer detects the temperature of each cell by temperature sensor, the temperature of each cell is in the battery temperature scope that presets, then single-chip microcomputer is carried out next step, otherwise, single-chip microcomputer sends " disconnection " signal to charge switch, and indicating circuit sends " temperature anomaly " signal, and the prompting battery temperature is unusual.
15) return execution the 4th) step.
During discharge, referring to Fig. 1, selector switch is dialled to " discharge ", and single-chip microcomputer works on power, and detects selector switch by the line with selector switch and be in " discharge " position, and single-chip microcomputer is carried out the discharge control program, and the method for discharge process control is:
1) single-chip microcomputer is by detecting the terminal voltage that gating circuit, A/D change-over circuit and voltage detecting circuit detect each cell, and the terminal voltage of each cell is then carried out next step greater than discharge cut-off voltage.Otherwise single-chip microcomputer sends " disconnection " signal to discharge switch, and indicating circuit sends " low-voltage " signal, the prompting brownout.
2) single-chip microcomputer detects the temperature of each cell by temperature sensor, the temperature of each cell is in the battery temperature scope that presets, then single-chip microcomputer is carried out next step, otherwise, single-chip microcomputer sends " disconnection " signal to discharge switch, and indicating circuit sends " temperature anomaly " signal, and the prompting battery temperature is unusual.
3) single-chip microcomputer reads the current discharging current in current detecting and the electric quantity metering circuit, and compares with the discharging current protection value that presets.Current discharging current is greater than discharging current protection value, and then single-chip microcomputer sends " disconnection " signal to discharge switch, stops discharge, and sends " discharge overcurrent protection " signal to indicating circuit, points out current discharging current unusual.Otherwise, return the 1st) and the step.
The beneficial effects of the utility model are, detect and write down parameters such as battery charge amount, terminal voltage, electric current, internal resistance, battery temperature, charging interval in the charging process before each the charging, in the charging process and after the charging end, calculate the variable quantity and the rate of change of each parameter, and compare with the initial parameter that presets, accurately judge the intensity of variation of charging performance of battery, the cell safety problem that may occur is carried out early warning, for the use of rechargeable battery provides the high security guarantee.
In charging process the lower cell of terminal voltage is carried out the feeder current equalizing charge, reducing the state difference of each cell, improve battery pack in the time of useful life, avoided the heating problem of many charging shunting balancing technique equalizing circuits in the charge balancing process of knowing, thereby increased substantially the ability of equalization, the application of big capacity, high power battery group has been had remarkable result.
In charging process, write down parameters such as battery charge amount, terminal voltage, electric current, internal resistance, battery temperature, charging interval in each charging process comprehensively, thereby write down the change procedure of the every electrical quantity of the whole life cycle of rechargeable battery, provide the data basis for carrying out the battery pack failure cause analysis.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is that this management of charging and discharging device circuit connects block diagram.
Fig. 2 is the Single Chip Microcomputer (SCM) program flow chart of this management of charging and discharging device.
Embodiment
Series battery in the present embodiment is an electric bicycle lithium rechargeable batteries group, form by 10 monomer Li-Ion rechargeable batteries. after new cell assembled in series becomes battery pack, carry out once complete discharge-charging process, 5 amperes of charging currents, and terminal voltage, internal resistance, charging interval of each cell in the record charging process, according to the parameter of record, design the preset parameter of this battery pack, and be stored in the memory, comprising:
1) internal resistance initial value and the error permissible value of each cell under different terminal voltages, as table 1:
Table 1: the internal resistance initial value of each cell under different terminal voltages
Internal resistance error permissible value=15 milliohms
2) in the charging process each cell at the terminal voltage climbing speed and the error permissible value of different terminal voltage sections, as table 2:
Table 2:
Voltage climbing speed permissible error=200%
3) accumulative total charge volume predetermined value: 10Ah
4) charge voltage range: 2.5-4.3V
5) discharge voltage range 2.7-4.35
6) charging cut-ff voltage value: 4.2V
7) discharge cut-off voltage value 3.0V
8) battery temperature scope: 10 ℃--55 ℃
9) charging current value: 5A
10) battery charging current error permissible value: 0.5A
11) discharging current protection value 18A
12) euqalizing current value 2A
13) terminal voltage imbalance values: 0.5V
Make circuit with reference to Fig. 1, charge switch and discharge switch adopt irf5210P channel field-effect pipe, make the gate driving of field effect transistor of the 2N5550 triode.The acousto-optic indicating device adopts 7 light-emitting diodes and a 5V buzzer, indicates the different conditions and the safe early warning information of battery in the charging process respectively.Communication interface adopts MAX232 serial communication interface integrated circuit.The AT89S52 microcontroller that single-chip microcomputer adopts atmel corp to produce.Memory adopts 24C256 serial storage chip.Photoelectric isolating circuit adopts TLP521-2 photoelectric coupling circuit chip.Selector switch uses 3 band switches of duplex.The A/D change-over circuit adopts the MAX1236 integrated circuit (IC) chip.Balanced gating circuit adopts MC14067B 16 to select 1 analog switch.Equalizer switch adopts two change over switch contacts electromagnetic relay.Charging control circuit and balancing control circuit select for use the MAX5160 digital regulation resistance to do the control input, and the 2N5551 triode is done control output.Charge power supply adopts the AC/DC Switching Power Supply of 220V input/0-48V Adjustable Output Voltage.The feeder current power supply adopts 220V input/5V2A constant current output AC/DC Switching Power Supply.Temperature sensor adopts the LM175 digital temperature sensor.Detect gating circuit and adopt 2 MC14067B 16 to select 1 analog switch, a slice is used for analog input, connects the analog signal output of each voltage detecting circuit, and another sheet connects the gating input of each voltage detecting circuit.Voltage detecting circuit, the MC34071 proportional amplifier integrated circuit of selecting for use ONSEMI company to produce.Current detecting and metering circuit adopt DS2751 Coulomb meter integrated circuit.Current sensor adopts the divertor of 75mV/20A.
Referring to Fig. 2, the establishment Single Chip Microcomputer (SCM) program.
Connect the each several part circuit referring to Fig. 1, after series battery is connected, connect external AC 220V power supply, select charge or discharge with selector switch.

Claims (3)

1, a kind of management of charging and discharging device that improves series battery fail safe and life-span, comprise single-chip microcomputer, memory, A/D change-over circuit, voltage detecting circuit, electric quantity metering and current detection circuit, balanced gating circuit, equalizer switch harmony optical indicator, it is characterized in that: single-chip microcomputer is connected with balanced gating circuit, balanced gating circuit is connected with equalizer switch, and the input of voltage detecting circuit is connected to the positive and negative electrode of measured cell.
2, a kind of management of charging and discharging device that improves series battery fail safe and life-span according to claim 1, it is characterized in that: said memory can be the independently memory of single-chip microcomputer outside, it also can be the inner integrated memory of single-chip microcomputer, store the preset parameter of battery pack in the memory, comprised internal resistance initial value, accumulative total charge volume predetermined value, charging cut-ff voltage value and the discharge cut-off voltage value of each cell in the series battery.
3, a kind of management of charging and discharging device that improves series battery fail safe and life-span according to claim 1, it is characterized in that: said equalizer switch is the electromagnetic relay of double break.
CNU2008201778867U 2008-11-25 2008-11-25 Charging and discharging management system for improving safety and service life of series-connected battery set CN201360156Y (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917036A (en) * 2010-07-28 2010-12-15 镇江恒驰科技有限公司 Dynamically balanced charging and discharging method for battery management system
CN101931254A (en) * 2010-08-31 2010-12-29 重庆大学 Guasi-static equalizing charge system and method for serially connected lithium battery pack
CN102315492A (en) * 2010-07-07 2012-01-11 上海航天电源技术有限责任公司 Power battery pack maintenance device and working method thereof
CN102340165A (en) * 2010-07-26 2012-02-01 李建国 Electrodynamic force vehicle power supply management system
CN102412616A (en) * 2010-09-26 2012-04-11 苏州益高电动车辆制造有限公司 Battery charging and discharging management device
CN102590752A (en) * 2011-12-02 2012-07-18 毛广甫 Testing method for voltage increasing rate and decreasing rate of battery pack
CN102623760A (en) * 2011-01-26 2012-08-01 上海樟村电子有限公司 Battery management system
CN104535947A (en) * 2014-11-24 2015-04-22 广东欧珀移动通信有限公司 Coulometer test method and device
CN104810893A (en) * 2015-05-07 2015-07-29 李欣彤 Electromagnetic balance type battery protector
CN105226746A (en) * 2015-09-18 2016-01-06 苏州工业园区职业技术学院 A kind of charging controller of battery
WO2016033868A1 (en) * 2014-09-04 2016-03-10 中兴通讯股份有限公司 Method and apparatus for displaying electricity quantity of battery, and electronic device
CN105429249A (en) * 2016-01-19 2016-03-23 宁德新能源科技有限公司 Battery control device and method for controlling battery
CN107147153A (en) * 2016-03-01 2017-09-08 财团法人工业技术研究院 Battery management system and apply its battery system
CN107591579A (en) * 2016-07-08 2018-01-16 王研 A kind of novel power battery group protection board
CN104734214B (en) * 2013-12-18 2018-08-14 比亚迪股份有限公司 Portable device and its charge/discharge control method

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102315492A (en) * 2010-07-07 2012-01-11 上海航天电源技术有限责任公司 Power battery pack maintenance device and working method thereof
CN102315492B (en) * 2010-07-07 2014-03-19 上海航天电源技术有限责任公司 Power battery pack maintenance device and working method thereof
CN102340165A (en) * 2010-07-26 2012-02-01 李建国 Electrodynamic force vehicle power supply management system
CN102340165B (en) * 2010-07-26 2015-02-11 李建国 Electrodynamic force vehicle power supply management system
CN101917036A (en) * 2010-07-28 2010-12-15 镇江恒驰科技有限公司 Dynamically balanced charging and discharging method for battery management system
CN101931254A (en) * 2010-08-31 2010-12-29 重庆大学 Guasi-static equalizing charge system and method for serially connected lithium battery pack
CN101931254B (en) * 2010-08-31 2012-12-26 重庆大学 Guasi-static equalizing charge system and method for serially connected lithium battery pack
CN102412616A (en) * 2010-09-26 2012-04-11 苏州益高电动车辆制造有限公司 Battery charging and discharging management device
CN102623760A (en) * 2011-01-26 2012-08-01 上海樟村电子有限公司 Battery management system
CN102590752A (en) * 2011-12-02 2012-07-18 毛广甫 Testing method for voltage increasing rate and decreasing rate of battery pack
CN104734214B (en) * 2013-12-18 2018-08-14 比亚迪股份有限公司 Portable device and its charge/discharge control method
US10317470B2 (en) 2014-09-04 2019-06-11 Zte Corporation Method and device for displaying SOC of battery, and electronic equipment thereof
WO2016033868A1 (en) * 2014-09-04 2016-03-10 中兴通讯股份有限公司 Method and apparatus for displaying electricity quantity of battery, and electronic device
CN104535947A (en) * 2014-11-24 2015-04-22 广东欧珀移动通信有限公司 Coulometer test method and device
CN104810893A (en) * 2015-05-07 2015-07-29 李欣彤 Electromagnetic balance type battery protector
CN105226746A (en) * 2015-09-18 2016-01-06 苏州工业园区职业技术学院 A kind of charging controller of battery
CN105429249A (en) * 2016-01-19 2016-03-23 宁德新能源科技有限公司 Battery control device and method for controlling battery
CN105429249B (en) * 2016-01-19 2018-08-24 宁德新能源科技有限公司 Battery control device and the method for controlling battery
CN107147153A (en) * 2016-03-01 2017-09-08 财团法人工业技术研究院 Battery management system and apply its battery system
US10700388B2 (en) 2016-03-01 2020-06-30 Industrial Technology Research Institute Battery management system and battery system using the same
CN107147153B (en) * 2016-03-01 2021-01-26 财团法人工业技术研究院 Battery management system and battery system using same
CN107591579A (en) * 2016-07-08 2018-01-16 王研 A kind of novel power battery group protection board

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Address after: 100013, 305, Xinghua Road, Dongcheng District, Beijing, China (room 9)

Patentee after: Zhao Jianhe

Address before: 100013, 311, Xinghua Road, Dongcheng District, Beijing, China (room 9)

Patentee before: Zhao Jianhe

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Granted publication date: 20091209

Termination date: 20131125