CN103457325A - Direct-type lithium ion battery lossless equilibration circuit and equilibration control method - Google Patents

Direct-type lithium ion battery lossless equilibration circuit and equilibration control method Download PDF

Info

Publication number
CN103457325A
CN103457325A CN2013103993079A CN201310399307A CN103457325A CN 103457325 A CN103457325 A CN 103457325A CN 2013103993079 A CN2013103993079 A CN 2013103993079A CN 201310399307 A CN201310399307 A CN 201310399307A CN 103457325 A CN103457325 A CN 103457325A
Authority
CN
China
Prior art keywords
battery
balanced
lithium ion
battery cell
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2013103993079A
Other languages
Chinese (zh)
Other versions
CN103457325B (en
Inventor
杨重山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU ALFA BUS CO Ltd
Original Assignee
JIANGSU ALFA BUS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU ALFA BUS CO Ltd filed Critical JIANGSU ALFA BUS CO Ltd
Priority to CN201310399307.9A priority Critical patent/CN103457325B/en
Publication of CN103457325A publication Critical patent/CN103457325A/en
Application granted granted Critical
Publication of CN103457325B publication Critical patent/CN103457325B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses a direct-type lithium ion battery lossless equilibration circuit and an equilibration control method and belongs to the field of battery management systems of electromobiles or large-power energy storage power stations. The circuit comprises a lithium ion battery pack, an equilibration switch control unit, a transformer equilibration unit and an equilibration switch control circuit. The lithium ion battery pack comprises more than one battery cell and controls energy to flow between the battery cells through the transformer equilibration unit controlled by the equilibration switch control unit, and thus the equilibration function is achieved. The direct-type lithium ion battery lossless equilibration circuit and the equilibration control method can make battery energy directly flow to batteries with lower voltage from batteries with high voltage and have the advantages of being high in efficiency, low in cost and simple in control structure.

Description

A kind of direct-type lithium ion battery non-dissipative equalizing circuit and balance control method
Technical field
The invention belongs to electric automobile or large power energy storage power station battery management system technical field, relate to a kind of direct-type lithium ion battery equalizing circuit and balance control method.
Background technology
Electric automobile or large power energy storage system are composed in series by a large amount of battery modules, owing on the lithium-ion battery monomer performance, having inconsistency, when battery set charge/discharge, there will be the inconsistency of monomer voltage.In the process of batteries charging or electric discharge, as long as there is a battery cell to reach the charging/discharging voltage limit of battery, whole battery pack will stop discharging and recharging, otherwise this monomer will be overcharged or mistake is put, have a strong impact on battery life, this phenomenon has seriously restricted the charging and discharging capabilities of battery.
Current balanced way divides two kinds.A kind of is to diminish equilibrium, is called again passive equilibrium, and the method for employing and battery cell parallel resistance, bypass unnecessary electric energy usually.Diminish balanced way electric energy conversion has been become to heat, in the time of inefficiency, the heat changed into brings larger burden to again the heat management of battery pack.Another kind is non-dissipative equalizing, is called again active equalization, usually adopts the method for electric capacity or inductance to carry out the energy transfer.Also useful transformer carries out the way of bottom or top equilibrium, after high monomer energy is emitted by voltage, is charged to whole battery module, and efficiency and portfolio effect are generally not high, and the control switch complex structural designs, and system reliability is not high.
Summary of the invention
The object of the present invention is to provide a kind of novel direct-type lithium ion battery non-dissipative equalizing circuit and balance control method, to overcome the shortcoming of existing equalization methods.
For realizing above purpose, technical solution of the present invention is as follows:
A kind of direct-type lithium ion battery non-dissipative equalizing circuit, wherein this circuit comprises lithium ion battery group, equalizer switch control unit, transformer balanced unit and equalizer switch control circuit, the lithium ion battery group comprises more than one battery cell, the transformer balanced unit that the lithium ion battery group is controlled by the equalizer switch control unit is controlled energy and is flowed between battery cell, completes equalization function.
The corresponding equalizer switch control unit of each battery cell and a transformer balanced unit.
Each equalizer switch control unit comprises two balanced control switchs, and the battery cell that these two balanced control switchs are corresponding with it is connected respectively, in order to control the charging and discharging of this battery cell.
Each transformer balanced unit comprises two balanced winding transformers, these two balanced winding transformer coil-winding opposite directions, and these two balanced winding transformers are connected with two balanced control switchs of corresponding equalizer switch control unit respectively.
The equalizer switch control unit is comprised of N-channel MOS field effect transistor and field effect transistor protective circuit, and field effect transistor drives by low limit, is the actuator of whole balanced action.
The equalizer switch control circuit is comprised of microprocessor and switch drive loop, can produce the low limit drive pulse signal of control switch field effect transistor, and its control logic is integrated in microprocessor.
The present invention provides a kind of balance control method that has adopted above-mentioned direct-type lithium ion battery non-dissipative equalizing circuit simultaneously, as follows:
With the voltage of each battery cell in microprocessor and voltage detecting circuit Real-time Collection lithium ion battery group, and calculate the highest battery cell voltage and the minimum battery cell voltage in battery pack;
Control the discharge switch conducting of the battery cell that voltage is the highest with microprocessor, electric energy is put in balanced winding transformer; Then this battery cell discharge switch disconnects, the charging control switch conducting of the battery cell that voltage is minimum, and the energy in balanced winding transformer is added in this battery cell, completes a charge and discharge process;
Continue to detect battery cell voltage with microprocessor, as meet equilibrium condition, reopen balancing procedure one time; If do not met equilibrium condition, no longer carry out balancing procedure.
Above-mentioned equilibrium condition depends on battery behavior and system equalization ability, and actual is the limit value that considers the unbalanced condition of battery of battery and system factor, and the deterministic process of this equilibrium condition, also comprise certain time delay process.
To sum up, the present invention makes the energy content of battery, and directly by voltage, high battery flows to the battery that voltage is low, has portfolio effect good, and efficiency is high, and cost is low, the simple advantage of control structure.
The accompanying drawing explanation
Fig. 1 is overall structure schematic block diagram of the present invention.
Fig. 2 is the battery cell control structure diagram that voltage is the highest.
Control impuls figure and current waveform figure that Fig. 3 is the balanced control switch that battery cell that voltage is the highest is corresponding.
Fig. 4 is the battery cell control structure diagram that voltage is minimum.
Control impuls figure and current waveform figure that Fig. 5 is the balanced control switch that battery cell that voltage is minimum is corresponding.
Wherein, battery cell C 1-c 6, balanced control switch S 1-s 12, balanced winding transformation L 1-l 12.
Embodiment
As Fig. 1 is overall structure schematic block diagram of the present invention.A kind of direct-type lithium ion battery of the present invention non-dissipative equalizing circuit, comprise lithium ion battery group C, equalizer switch control unit S, transformer balanced unit L and equalizer switch control circuit.
Lithium ion battery group C comprises more than one battery cell C x(as the C in Fig. 1 1-c 6), the transformer balanced unit L that lithium ion battery group C controls by equalizer switch control unit S controls energy at battery cell C xbetween flow, complete equalization function.
Each battery cell C xa corresponding equalizer switch control unit S and a transformer balanced unit L.
Each equalizer switch control unit S comprises two balanced control switch S x(as the S in Fig. 1 1-s 12), these two balanced control switch S xthe battery cell C corresponding with it xbe connected respectively, in order to control this battery cell C xcharging and discharging.
Each transformer balanced unit L comprises two balanced winding transformer L x(as the L in Fig. 1 1-l 12), these two balanced winding transformer L xcoil-winding opposite direction, and these two balanced winding transformer L xrespectively with two balanced control switch S of corresponding equalizer switch control unit S xbe connected.
In Fig. 1 with battery cell C 5and C 2for example, introduced energy at balanced winding transformer L xin flow process.As Fig. 1, battery cell C 5voltage is the highest, battery cell C 2monomer voltage is minimum, C 5energy by balanced control switch S 10and S 3control by energy by battery cell C 5passed to battery cell C 2.
Charge and discharge process is introduced:
As shown in Fig. 2 to Fig. 5, suppose that in lithium ion battery group C, the battery cell that voltage is the highest is numbered C m, the battery cell that voltage is minimum is numbered C n, and the voltage difference scope meets the unbalanced condition limit value of battery, and balancing procedure is activated.
At first, as shown in Figure 2, closed balanced control switch S 2M, as shown in Figure 3, electric current is from battery cell C for control impuls mflow out, and by electrical power storage at balanced winding transformer L 2Min, current waveform is as shown under Fig. 3.
After discharge process finishes, control impuls is closed, balanced control switch S 2Mdisconnect, disconnect balanced control switch S 2Mthe time, the minimum battery cell C by voltage nbalanced control switch S 2N-1closed.Balanced control switch S 2Mdisconnect moment, balanced winding transformer L 2Mcoil current reduces to zero, with balanced winding transformer L 2Mthe balanced winding transformer L that direction of winding is contrary 2N-1produce a larger inverse electromotive force in coil, this inverse electromotive force is by balanced winding transformer L 2N-1energy refunds C in coil nin, complete charging, as shown in Figure 4 and Figure 5.
Balanced control switch S 2N-1after disconnection, complete a complete balance charge/discharge process.Again detect battery cell voltage, if battery cell voltage still meets the unbalanced condition of battery, continue to open new balancing procedure.

Claims (8)

1. a direct-type lithium ion battery non-dissipative equalizing circuit, it is characterized in that: this circuit comprises lithium ion battery group, equalizer switch control unit, transformer balanced unit and equalizer switch control circuit, the lithium ion battery group comprises more than one battery cell, the transformer balanced unit that the lithium ion battery group is controlled by the equalizer switch control unit is controlled energy and is flowed between battery cell, completes equalization function.
2. direct-type lithium ion battery non-dissipative equalizing circuit as claimed in claim 1, is characterized in that: the corresponding equalizer switch control unit of described each battery cell and a transformer balanced unit.
3. direct-type lithium ion battery non-dissipative equalizing circuit as claimed in claim 2, it is characterized in that: described each equalizer switch control unit comprises two balanced control switchs, the battery cell that these two balanced control switchs are corresponding with it is connected respectively, in order to control the charging and discharging of this battery cell, described each transformer balanced unit comprises two balanced winding transformers, these two balanced winding transformer coil-winding opposite directions, and these two balanced winding transformers are connected with two balanced control switchs of corresponding equalizer switch control unit respectively.
4. as claim 1 or 2 or 3 described direct-type lithium ion battery non-dissipative equalizing circuit; it is characterized in that: described equalizer switch control unit is comprised of N-channel MOS field effect transistor and field effect transistor protective circuit; field effect transistor drives by low limit, is the actuator of whole balanced action.
5. as the described direct-type lithium ion battery of arbitrary claim non-dissipative equalizing circuit in claim 4, it is characterized in that: described equalizer switch control circuit is comprised of microprocessor and switch drive loop, can produce the low limit drive pulse signal of control switch field effect transistor, its control logic is integrated in microprocessor.
6. a balance control method that adopts direct-type lithium ion battery non-dissipative equalizing circuit as claimed in claim 1 is characterized in that:
With the voltage of each battery cell in microprocessor and voltage detecting circuit Real-time Collection lithium ion battery group, and calculate the highest battery cell voltage and the minimum battery cell voltage in battery pack;
Control the discharge switch conducting of the battery cell that voltage is the highest with microprocessor, electric energy is put in balanced winding transformer; Then this battery cell discharge switch disconnects, the charging control switch conducting of the battery cell that voltage is minimum, and the energy in balanced winding transformer is added in this battery cell, completes a charge and discharge process;
Continue to detect battery cell voltage with microprocessor, as meet equilibrium condition, reopen balancing procedure one time; If do not met equilibrium condition, no longer carry out balancing procedure.
7. balance control method as claimed in claim 6, it is characterized in that: described equilibrium condition depends on battery behavior and system equalization ability, the actual limit value for the unbalanced condition of battery that considers battery and system factor.
8. balance control method as claimed in claim 6, it is characterized in that: the deterministic process of described equilibrium condition also comprises certain time delay process.
CN201310399307.9A 2013-09-05 2013-09-05 A kind of direct-type lithium ion battery non-dissipative equalizing circuit and balance control method Active CN103457325B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310399307.9A CN103457325B (en) 2013-09-05 2013-09-05 A kind of direct-type lithium ion battery non-dissipative equalizing circuit and balance control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310399307.9A CN103457325B (en) 2013-09-05 2013-09-05 A kind of direct-type lithium ion battery non-dissipative equalizing circuit and balance control method

Publications (2)

Publication Number Publication Date
CN103457325A true CN103457325A (en) 2013-12-18
CN103457325B CN103457325B (en) 2019-01-11

Family

ID=49739411

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310399307.9A Active CN103457325B (en) 2013-09-05 2013-09-05 A kind of direct-type lithium ion battery non-dissipative equalizing circuit and balance control method

Country Status (1)

Country Link
CN (1) CN103457325B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105355990A (en) * 2015-09-29 2016-02-24 中国空间技术研究院 Lithium-ion batteries and management unit integrating system and method
CN106410895A (en) * 2016-09-27 2017-02-15 北京新能源汽车股份有限公司 Battery balancing device, automobile battery balancing system and balancing method
CN107039687A (en) * 2016-02-04 2017-08-11 北京波士顿动力电池有限公司 A kind of non-dissipative equalizing circuit for electric automobile power battery
WO2018161350A1 (en) * 2017-03-10 2018-09-13 深圳中兴力维技术有限公司 Efficient nondestructive equalization method for storage battery and system thereof
CN108598604A (en) * 2018-05-09 2018-09-28 哈尔滨工业大学 Flyback mode series connection accumulation equalizing circuit
CN109120028A (en) * 2018-01-31 2019-01-01 清华大学 Full intercommunication magnetic circuit network type battery automatic equalization compensation system and control method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101467326A (en) * 2006-06-15 2009-06-24 Sk能源株式会社 Charge equalization apparatus with parallel connection of primary windings of multiple transformers
CN102035010A (en) * 2009-09-29 2011-04-27 凹凸电子(武汉)有限公司 Battery unit equalizing circuit and method
CN102163854A (en) * 2011-02-23 2011-08-24 中航锂电(洛阳)有限公司 Charge-discharge equalizing circuit of multi-monomer tandem dynamic lithium battery
CN102522790A (en) * 2011-12-05 2012-06-27 中电普瑞科技有限公司 Equalization device for series battery packs
CN102856954A (en) * 2012-08-22 2013-01-02 杭州杰能动力有限公司 Power battery balancing method, unit, battery management system and electric vehicle
KR20130013108A (en) * 2011-07-27 2013-02-06 현대모비스 주식회사 Balancing apparatus of secondary battery
CN202856386U (en) * 2012-07-31 2013-04-03 刘阶萍 Charge-discharge active equalizing smart battery module and system
CN103280862A (en) * 2013-06-06 2013-09-04 肖兴龙 Series battery pack voltage equalizer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101467326A (en) * 2006-06-15 2009-06-24 Sk能源株式会社 Charge equalization apparatus with parallel connection of primary windings of multiple transformers
CN102035010A (en) * 2009-09-29 2011-04-27 凹凸电子(武汉)有限公司 Battery unit equalizing circuit and method
CN102163854A (en) * 2011-02-23 2011-08-24 中航锂电(洛阳)有限公司 Charge-discharge equalizing circuit of multi-monomer tandem dynamic lithium battery
KR20130013108A (en) * 2011-07-27 2013-02-06 현대모비스 주식회사 Balancing apparatus of secondary battery
CN102522790A (en) * 2011-12-05 2012-06-27 中电普瑞科技有限公司 Equalization device for series battery packs
CN202856386U (en) * 2012-07-31 2013-04-03 刘阶萍 Charge-discharge active equalizing smart battery module and system
CN102856954A (en) * 2012-08-22 2013-01-02 杭州杰能动力有限公司 Power battery balancing method, unit, battery management system and electric vehicle
CN103280862A (en) * 2013-06-06 2013-09-04 肖兴龙 Series battery pack voltage equalizer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105355990A (en) * 2015-09-29 2016-02-24 中国空间技术研究院 Lithium-ion batteries and management unit integrating system and method
CN105355990B (en) * 2015-09-29 2017-12-22 中国空间技术研究院 A kind of lithium-ions battery and administrative unit integrated system and method
CN107039687A (en) * 2016-02-04 2017-08-11 北京波士顿动力电池有限公司 A kind of non-dissipative equalizing circuit for electric automobile power battery
CN106410895A (en) * 2016-09-27 2017-02-15 北京新能源汽车股份有限公司 Battery balancing device, automobile battery balancing system and balancing method
CN106410895B (en) * 2016-09-27 2019-07-09 北京新能源汽车股份有限公司 A kind of battery balanced device, the equal balance system of automobile batteries and equalization methods
WO2018161350A1 (en) * 2017-03-10 2018-09-13 深圳中兴力维技术有限公司 Efficient nondestructive equalization method for storage battery and system thereof
CN109120028A (en) * 2018-01-31 2019-01-01 清华大学 Full intercommunication magnetic circuit network type battery automatic equalization compensation system and control method
CN108598604A (en) * 2018-05-09 2018-09-28 哈尔滨工业大学 Flyback mode series connection accumulation equalizing circuit

Also Published As

Publication number Publication date
CN103457325B (en) 2019-01-11

Similar Documents

Publication Publication Date Title
CN102222957B (en) Automatic battery capacity equalization circuit and implementing method thereof
CN102185159B (en) Basic unit lithium battery pack module, multistage lithium battery pack and charge and discharge equilibrium method
CN103457325A (en) Direct-type lithium ion battery lossless equilibration circuit and equilibration control method
CN203660604U (en) Power battery equalization management system of electric automobile
CN107294174B (en) Battery monomer and battery pack equalization circuit structure and method
CN105140998B (en) The two-way non-dissipative equalizing circuit of series battery based on inductive energy storage
CN104734260A (en) Power battery equalizing charge method and system
CN104201654A (en) Battery pack balance protecting system and method
CN103036277B (en) Equalizer circuit of dynamic and energy storage battery pack
TWM441267U (en) Modular bidirectional flyback cell balancing circuit
CN204615463U (en) A kind of electrokinetic cell active equalization charging device
CN103036256A (en) Transformer scan chain type storage battery equalizing circuit and method
CN204559135U (en) The equalizing system of electricity
CN203827031U (en) Battery group equalization circuit based on multi-secondary transformer
CN203014420U (en) Battery management system with single battery energy balance control function
CN204947672U (en) The two-way non-dissipative equalizing circuit of series battery based on inductive energy storage
CN102270871B (en) Pneumatic-control charging-type electric quantity equalizing system for power battery pack
CN102593916B (en) A kind of lithium battery group initiatively equalizing charge system and method
CN204721043U (en) Lithium battery active equalization module
CN205081508U (en) A balanced device of charge -discharge for group battery
CN205335877U (en) Series battery equalizer circuit based on inductance charge -discharge energy transduction
CN204732920U (en) Lithium battery active equalization control device
CN104734231A (en) Series battery pack equalizing device based on bidirectional direct-current converters and equalizing method
CN107733007A (en) A kind of direct equalizing circuit of battery pack Bi-objective and equalization methods
CN103066642A (en) Energy balance control system among single batteries inside battery pack

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
GR01 Patent grant