CN101262138A - Monocase balanced system for lithium ion dynamic battery - Google Patents

Monocase balanced system for lithium ion dynamic battery Download PDF

Info

Publication number
CN101262138A
CN101262138A CNA2008100937413A CN200810093741A CN101262138A CN 101262138 A CN101262138 A CN 101262138A CN A2008100937413 A CNA2008100937413 A CN A2008100937413A CN 200810093741 A CN200810093741 A CN 200810093741A CN 101262138 A CN101262138 A CN 101262138A
Authority
CN
China
Prior art keywords
battery cell
battery
voltage
equalization
cell
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.)
Pending
Application number
CNA2008100937413A
Other languages
Chinese (zh)
Inventor
马建新
张维鑫
邱林
戴润义
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.)
Chery Automobile Co Ltd
Original Assignee
Chery Automobile 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
Priority to CN200710191213.7 priority Critical
Priority to CN200710191213 priority
Application filed by Chery Automobile Co Ltd filed Critical Chery Automobile Co Ltd
Priority to CNA2008100937413A priority patent/CN101262138A/en
Publication of CN101262138A publication Critical patent/CN101262138A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

The invention relates to a monomer equalization system of lithium-ion batteries, which comprises at least two battery monomers B connected in series. Every two adjacent battery monomers B are connected with a controllable switch K in parallel respectively, a capacitor C is connected in series between two controllable switches K and two controllable switches K are in two electric connection statuses, either connected or disconnected with any battery monomer B thereinto; a voltage acquisition control module collects the data of voltage, which are processed and outputs control signals to drive corresponding controllable switches K and ensure that the capacitor C is communicated with the battery monomer B to be treated. The monomer equalization system provided by the invention ensures the battery monomers B charge or discharge the capacitor C by controlling the connection and disconnection between the controllable switches K and the battery monomers B, successfully transfers charge from the battery monomers B of high voltage to the battery monomers B of low voltage, thereby improving the performance of the battery, prolonging the service life of battery and being not only suitable to static equalization management but also to dynamic equalization management.

Description

The monomer equalization system of lithium-ion-power cell
Technical field
The present invention relates to the electrokinetic cell of hybrid vehicle, especially a kind of monomer equalization system of lithium-ion-power cell.
Background technology
The electrokinetic cell of hybrid vehicle is by a plurality of monomer series-connected compositions, and the type of electrokinetic cell has lead-acid battery, Ni-MH battery, lithium ion battery etc.But lithium-ion-power cell has plurality of advantages such as energy density height high current charge-discharge, memory-less effect, the cost of raw material be low, will replace lead-acid battery, Ni-MH battery, becomes the winner of electrokinetic cell.
The principal element that influences electrokinetic cell performance and life-span comprises battery temperature, the internal resistance of cell, cell consistency etc., battery cell is because the otherness of manufacturing and environment for use, in the use of battery, the otherness of battery cell will progressively worsen, the inconsistency of lithium-ion battery monomer not only influences the performance and the life-span of battery, and influence the safety of battery, lithium-ion battery systems always has the high battery of monomer voltage, other battery enters overcharge condition earlier in the group relatively, the battery cell that overcharges is along with charging constantly carries out, polarization is strengthened, heat up and aggravate, follow irreversible gassing reaction, battery capacity reduces, and might in the short time after charging finishes, make the inside battery substance combustion, cause battery to be scrapped.
For the reliability that improves lithium-ion-power cell and the fail safe of system, prolong the life-span of battery lithium-ion-power cell, management system should have the function of battery cell equalization.Prior art adopts the equalization management of the principle realization battery cell B of energy consumption, as shown in Figure 1, and discharge resistance R 1, R 2R nRespectively by controllable switch S W 1, SW 2SW n, SW N+1With battery cell B 1, B 2B nParallel connection, control module 1 is judged battery cell B 1, B 2B nIn the monomer of otherness appears, controlling corresponding discharge resistance is connected with battery cell, method by discharge, reduce the capacity of the higher battery cell of voltage, realize the monomer equalization, prior art can only realize in the battery static process, and the equalization process follows heat to produce, the energy of consuming cells not only, and produced a large amount of heats, increased the difficulty of heat management design.In addition, the energy consumption in the equalization process has not only reduced the energy efficiency of battery, and the heat that discharge resistance produces has also increased the difficulty that battery thermal management designs.
Summary of the invention
The object of the present invention is to provide a kind of monomer equalization system that shifts the lithium-ion-power cell of realizing the monomer equalization by energy.
For achieving the above object, the monomer equalization system of a kind of lithium-ion-power cell provided by the invention, comprise at least two battery cell B of polyphone mutually, gate-controlled switch K in parallel separately on any two adjacent battery cell B, capacitor C of series connection between two gate-controlled switch K, two gate-controlled switch K are in two kinds of status of electrically connecting that are switched on or switched off with wherein any one battery cell B, the voltage acquisition control module is gathered the voltage of battery and is exported control signal after treatment and drives corresponding gate-controlled switch K, and capacitor C is communicated with pending battery cell B.
The present invention makes battery cell B charge to capacitor C by the break-make of controlling gate-controlled switch K and battery cell B or makes the capacitor C discharge, realized that successfully electric charge is from the transfer of the high battery cell B of voltage to voltage low battery cell B, improved the performance of battery, prolonged the life-span of battery, both be applicable to the static equilibrium management, also be applicable to the dynamic equalization management, simultaneously, both avoid reducing the energy efficiency of battery, also avoided increasing the difficulty of battery thermal management design.
Description of drawings
Fig. 1 is the control circuit figure of prior art;
Fig. 2 is a circuit diagram of the present invention;
Fig. 3 is control circuit figure of the present invention;
Control flow chart of the present invention during Fig. 4.
Embodiment
A kind of monomer equalization system of lithium-ion-power cell, comprise at least two battery cell B of polyphone mutually, gate-controlled switch K in parallel separately on any two adjacent battery cell B, capacitor C of series connection between two gate-controlled switch K, two gate-controlled switch K are in two kinds of status of electrically connecting that are switched on or switched off with wherein any one battery cell B, voltage acquisition control module 10 is gathered the voltage of battery and is exported control signal after treatment and drives corresponding gate-controlled switch K, capacitor C is communicated with pending battery cell B, and pending battery cell B is to the capacitor C charging or make capacitor C to pending battery cell B discharge.
Two or more pending battery cell B are directly or indirectly adjacent, promptly can be adjacent, and also can be non-conterminous.Direct neighbor is meant that the positive and negative electrode of two or more pending battery cell B joins, and indirect neighbor is separated with one or more battery cell B between being meant between two or more pending battery cell B.Pending battery cell B can be one, also can be two or more, during two or more battery cell B apart from each other, voltage acquisition control module 10 is controlled gate-controlled switch K continually and is switched between battery cell B, realize the transfer of energy by the transmission of energy, in this case, realize that the monomer needed time of equalization will be higher than the equalization of two battery cell B that close on.
Described gate-controlled switch K adopts relay J, and its moving contact links to each other with capacitor C, and two fixed contact links to each other with the both positive and negative polarity of battery cell B respectively, as shown in Figure 2, selects electromagnetic relay J among the embodiment for use.
Described voltage acquisition control module 10 is gathered the voltage U at power brick two ends and the voltage of each battery cell B, and the average voltage U of counting cell monomers B Ave, U Ave=U/n, n are the number of battery cell, calculate voltage and the average voltage U of each battery cell B then AveDifference DELTA U n, if Δ U nThe absolute value threshold value Δ U that need carry out equalization management greater than battery cell B, if this battery cell of mark B then is Δ U nFor on the occasion of, then this battery cell of mark B need carry out the equalization discharge management, if Δ U nBe negative value, then this battery cell of mark B need carry out the charge balancing management.
Described voltage acquisition control module 10 comprises single-chip microcomputer 11, the output of single-chip microcomputer 11 links to each other with resistance R, the resistance of resistance R is between 1K Ω and 2K Ω, resistance R links to each other with the grid of the metal-oxide-semiconductor field effect transistor Q of N raceway groove, the source ground of metal-oxide-semiconductor field effect transistor Q, the coil of electromagnetic relay J links to each other with the drain electrode of metal-oxide-semiconductor field effect transistor Q, the positive pole of 12V power supply VCC respectively, power supply VCC provides power supply for control circuit, single-chip microcomputer 11 can drive a plurality of relay J by a plurality of metal-oxide-semiconductor field effect transistor Q, as shown in Figure 3.When voltage acquisition control module 10 executes all judgements, and mark is after all need the battery cell B of equalization management, and single-chip microcomputer 11 output control signal corresponding are boosted through resistance R, drive the relay J action through metal-oxide-semiconductor field effect transistor Q again.
Be further described in conjunction with Fig. 2,4 pairs of native systems.
By the characteristic decision of lithium battery, the voltage difference between each battery cell B can not surpass 0.1V, wherein U AveBe the monomer average voltage, the voltage U that voltage acquisition control module 10 is gathered each battery cell B n, after treated device is handled, if judge U 1-U Ave>0.1V and U 3-U Ave<-0.1V, mark battery monomers B 1Need discharge, mark battery monomers B 3Need charging, single-chip microcomputer 11 output control signals drive relay J 1, its moving contact 1a and fixed contact 1b closure drive relay J 2, make its moving contact 2a and fixed contact 2b closure, battery cell B 1With capacitor C 1Be communicated with battery cell B 1Give capacitor C 1Charging is when judging capacitor C 1After being full of electricity, single-chip microcomputer 11 output control signals drive relay J 1, its moving contact 1a and fixed contact 1c closure drive relay J 2, its moving contact 2a and fixed contact 2c closure drive relay J 3, its moving contact 3a and fixed contact 3b closure drive relay J 4, its moving contact 4a and fixed contact 4b closure, capacitor C 1To capacitor C 2Capacitor C is worked as in charging 2Be full of electricity, single-chip microcomputer 11 output control signals drive relay J 3, its moving contact 3a and fixed contact 3c closure drive relay J 4, its moving contact 4a and fixed contact 4c closure, capacitor C 2With battery cell B 3Be communicated with capacitor C 2To battery cell B 3Charging by this process, realizes that electric charge is from the low battery cell B of voltage 3Transfer, realize the management of monomer balancing energy.The present invention can be used for the equalization management in battery static state or the dynamic process, and the equalization process had both been avoided consume battery power, also avoids at the inner heat that produces of power brick.
Core of the present invention is to utilize energy transfer principles, by control relay J and pending battery cell B connection, the high battery cell B of voltage is charged to capacitor C, make the battery cell B discharge low of this capacitor C again to voltage, realize that energy shifts between the low battery cell B of the high battery cell B of voltage and voltage, thereby realize the equalization of monomer.

Claims (5)

1, a kind of monomer equalization system of lithium-ion-power cell, comprise at least two battery cell B of polyphone mutually, it is characterized in that: gate-controlled switch K in parallel separately on any two adjacent battery cell B, capacitor C of series connection between two gate-controlled switch K, two gate-controlled switch K are in two kinds of status of electrically connecting that are switched on or switched off with wherein any one battery cell B, voltage acquisition control module (10) is gathered the voltage of battery and is exported control signal after treatment and drives corresponding gate-controlled switch K, and capacitor C is communicated with pending battery cell B.
2, the monomer equalization system of lithium-ion-power cell according to claim 1 is characterized in that: two or more pending battery cell B are directly or indirectly adjacent.
3, the monomer equalization system of lithium-ion-power cell according to claim 1 is characterized in that: described gate-controlled switch K adopts relay J, and its moving contact links to each other with capacitor C, and its fixed contact links to each other with the both positive and negative polarity of battery cell B respectively.
4, the monomer equalization system of lithium-ion-power cell according to claim 1 and 2, it is characterized in that: described voltage acquisition control module (10) is gathered the voltage U at power brick two ends and the voltage of each battery cell B, and the average voltage U of counting cell monomers B Ave, calculate voltage and the average voltage U of each battery cell B then AveDifference DELTA U n, if Δ U nThe absolute value threshold value Δ U that need carry out equalization management greater than battery cell B, if this battery cell of mark B then is Δ U nFor on the occasion of, then this battery cell of mark B need carry out the equalization discharge management, if Δ U nBe negative value, then this battery cell of mark B need carry out the charge balancing management.
5, the monomer equalization system of lithium-ion-power cell according to claim 1 and 2, it is characterized in that: described voltage acquisition control module (10) comprises single-chip microcomputer (11), the output of single-chip microcomputer (11) links to each other with resistance R, resistance R links to each other with the grid of the metal-oxide-semiconductor field effect transistor Q of N raceway groove, the source ground of metal-oxide-semiconductor field effect transistor Q, relay J link to each other with the drain electrode of metal-oxide-semiconductor field effect transistor Q, the positive pole of 12V power supply VCC respectively.
CNA2008100937413A 2007-12-05 2008-04-18 Monocase balanced system for lithium ion dynamic battery Pending CN101262138A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN200710191213.7 2007-12-05
CN200710191213 2007-12-05
CNA2008100937413A CN101262138A (en) 2007-12-05 2008-04-18 Monocase balanced system for lithium ion dynamic battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100937413A CN101262138A (en) 2007-12-05 2008-04-18 Monocase balanced system for lithium ion dynamic battery

Publications (1)

Publication Number Publication Date
CN101262138A true CN101262138A (en) 2008-09-10

Family

ID=39962421

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2008100937413A Pending CN101262138A (en) 2007-12-05 2008-04-18 Monocase balanced system for lithium ion dynamic battery

Country Status (1)

Country Link
CN (1) CN101262138A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101976866A (en) * 2010-10-17 2011-02-16 中国船舶重工集团公司第七一二研究所 Balanced judgment and supplementary device of energy transfer type battery pack and method thereof
CN102055224A (en) * 2010-12-21 2011-05-11 深圳市佳华利道新技术开发有限公司 Battery voltage balancing circuit and method thereof
CN102074748A (en) * 2009-11-23 2011-05-25 登丰微电子股份有限公司 Battery voltage balancing device and battery charging device
CN102170145A (en) * 2010-02-27 2011-08-31 比亚迪股份有限公司 A discharge balancing device for a battery pack and a working method of the device
CN102332619A (en) * 2011-09-28 2012-01-25 上海交通大学 Controllable battery module
CN102901931A (en) * 2012-09-24 2013-01-30 合肥国轩高科动力能源有限公司 Method for screening lithium batteries with abnormal self discharge
CN103107565A (en) * 2011-11-15 2013-05-15 赵俊义 Static balanced method of battery management system of electric vehicle
CN103151815A (en) * 2013-03-18 2013-06-12 天津大学 Method for controlling equalizing charge of elementary cell of battery pack
CN103532204A (en) * 2013-10-31 2014-01-22 上海电动工具研究所 Switched capacitor-based power lithium ion battery pack electric quantity balancing chip circuit
CN103683341A (en) * 2012-08-31 2014-03-26 中信国安盟固利动力科技有限公司 On-line two-way balancing device for energy storage system battery modules
CN105083037A (en) * 2014-05-08 2015-11-25 福特全球技术公司 Battery cell state of charge estimation
CN106340931A (en) * 2016-10-15 2017-01-18 山东泰汽新能源工程研究院有限公司 Lithium battery pack management method employing single-battery voltage lower limit equalization
CN107895983A (en) * 2017-11-30 2018-04-10 宁德时代新能源科技股份有限公司 Battery equalization method and device, computer-readable recording medium, cell managing device and delivery vehicle
CN108550926A (en) * 2018-04-26 2018-09-18 奇瑞汽车股份有限公司 battery system and electric vehicle
CN110994748A (en) * 2019-12-31 2020-04-10 联动天翼新能源有限公司 Lithium battery passive balance control method

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102074748A (en) * 2009-11-23 2011-05-25 登丰微电子股份有限公司 Battery voltage balancing device and battery charging device
CN102170145A (en) * 2010-02-27 2011-08-31 比亚迪股份有限公司 A discharge balancing device for a battery pack and a working method of the device
CN101976866A (en) * 2010-10-17 2011-02-16 中国船舶重工集团公司第七一二研究所 Balanced judgment and supplementary device of energy transfer type battery pack and method thereof
CN102055224A (en) * 2010-12-21 2011-05-11 深圳市佳华利道新技术开发有限公司 Battery voltage balancing circuit and method thereof
CN102332619B (en) * 2011-09-28 2015-01-14 上海交通大学 Controllable battery module
CN102332619A (en) * 2011-09-28 2012-01-25 上海交通大学 Controllable battery module
CN103107565A (en) * 2011-11-15 2013-05-15 赵俊义 Static balanced method of battery management system of electric vehicle
CN103683341B (en) * 2012-08-31 2017-06-13 中信国安盟固利动力科技有限公司 A kind of on-line automatic bidirectional equalization device of energy storage system storage battery module
CN103683341A (en) * 2012-08-31 2014-03-26 中信国安盟固利动力科技有限公司 On-line two-way balancing device for energy storage system battery modules
CN102901931A (en) * 2012-09-24 2013-01-30 合肥国轩高科动力能源有限公司 Method for screening lithium batteries with abnormal self discharge
CN102901931B (en) * 2012-09-24 2015-01-07 合肥国轩高科动力能源股份公司 Method for screening lithium batteries with abnormal self discharge
CN103151815A (en) * 2013-03-18 2013-06-12 天津大学 Method for controlling equalizing charge of elementary cell of battery pack
CN103151815B (en) * 2013-03-18 2014-10-22 天津大学 Method for controlling equalizing charge of elementary cell of battery pack
CN103532204A (en) * 2013-10-31 2014-01-22 上海电动工具研究所 Switched capacitor-based power lithium ion battery pack electric quantity balancing chip circuit
CN105083037A (en) * 2014-05-08 2015-11-25 福特全球技术公司 Battery cell state of charge estimation
CN105083037B (en) * 2014-05-08 2019-06-28 福特全球技术公司 The estimation of battery unit state-of-charge
CN106340931A (en) * 2016-10-15 2017-01-18 山东泰汽新能源工程研究院有限公司 Lithium battery pack management method employing single-battery voltage lower limit equalization
CN107895983A (en) * 2017-11-30 2018-04-10 宁德时代新能源科技股份有限公司 Battery equalization method and device, computer-readable recording medium, cell managing device and delivery vehicle
CN107895983B (en) * 2017-11-30 2019-12-24 宁德时代新能源科技股份有限公司 Battery equalization method and device, computer readable storage medium, battery management device and vehicle
CN108550926A (en) * 2018-04-26 2018-09-18 奇瑞汽车股份有限公司 battery system and electric vehicle
CN110994748A (en) * 2019-12-31 2020-04-10 联动天翼新能源有限公司 Lithium battery passive balance control method

Similar Documents

Publication Publication Date Title
CN101262138A (en) Monocase balanced system for lithium ion dynamic battery
JP5571129B2 (en) Hybrid power system
CN103051019A (en) Battery pack series-parallel switching control system and charge and discharge control method thereof
CN102005794B (en) Battery pack charging management system and method
CN203166556U (en) Multipath cell series-parallel automatic conversion circuit
CN102593893A (en) System for realizing balanced discharging of battery sets
CN111009703A (en) Heating control device and heating control method for battery
CN102832667A (en) Charge-discharge equalizer circuit based on inductive energy storage for series battery pack
CN201204476Y (en) Voltage equalization circuit for multiple series-connected batteries
CN105186628A (en) Intelligent charging pile system for electric automobile
CN103192731A (en) Solar energy compensated electric vehicle battery vehicle-mounted charging heating device
CN103036256A (en) Transformer scan chain type storage battery equalizing circuit and method
CN201854071U (en) Battery pack charging management system
CN102088200B (en) Solar active equalization storage battery device of electrocar
CN1332490C (en) Semiconductor refrigerating type equalizing charging method and device
CN108879006B (en) Battery pack heating control strategy
CN203536996U (en) Device for charging battery cells in serial lithium battery
CN102832666A (en) Inductive energy storage based series battery pack discharging balancing circuit
CN202749869U (en) Series battery discharge equalization circuit based on inductive energy storage
CN201985564U (en) Solar active equalized storage battery device for electromobile and electromobile
CN108232344B (en) Battery low-temperature heating system and method coupled with non-dissipative equalization system
CN105375599A (en) Electric automobile direct-current charging pile system
CN105162210A (en) Electric automobile direct-current charging pile system
CN105375555A (en) Electric automobile intelligent charging pile system
CN208352470U (en) Electrokinetic cell system

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
RJ01 Rejection of invention patent application after publication

Open date: 20080910

C12 Rejection of a patent application after its publication