CN105789715A - Battery sampling and equalization circuits sharing switch array - Google Patents
Battery sampling and equalization circuits sharing switch array Download PDFInfo
- Publication number
- CN105789715A CN105789715A CN201610104589.9A CN201610104589A CN105789715A CN 105789715 A CN105789715 A CN 105789715A CN 201610104589 A CN201610104589 A CN 201610104589A CN 105789715 A CN105789715 A CN 105789715A
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- Prior art keywords
- switch
- sampling
- circuit
- battery
- equalizing circuit
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention provides battery sampling and equalization circuits sharing a switch array. The battery sampling and equalization circuits comprise a battery pack, a flying capacitor sampling circuit, a fly-back type equalization circuit and the switch array, wherein the dotted terminal of the primary side of the flyback type equalization circuit is connected with the high voltage terminal of the battery pack while the non-dotted terminal is grounded through an MOS transistor; the secondary side of the flyback type equalization circuit is connected to the switch array through switches S3 and S4; and one end of a capacitor C1 of the flying capacitor sampling circuit is connected to the switch array while the other end is connected with an ADC through switches S1 and S2. According to the battery sampling and equalization circuits, the time division multiplex access of the switch array can be realized for the flying capacitor sampling circuit and the flyback type equalization circuit, so that the number of the circuit switches is reduced, and the control logic complexity and the manufacturing cost are lowered.
Description
Technical field
Type of the present invention relates to battery management system field, particularly relate to the battery sampling equalizing circuit of a kind of common switch array, achieve and fly capacitor sampling circuit and inverse-excitation type equalizing circuit switch arrays time-sharing multiplex, decrease contactor quantity and manufacturing cost, reduce control logical complexity.
Background technology
Developing rapidly the raising day by day with living standards of the people along with World Economics, whole world automobile pollution is just increasing, and sharply increasing of automobile quantity brings serious environmental problem；Research shows, in recent years in atmosphere pollution, the Hydrocarbon of 73.5%, the carbon monoxide of 63.4% and 46% oxynitride come from vehicle exhaust.
In view of serious environmental problem and energy crisis, readjust the energy structure energetically in countries in the world, one of field that new-energy automobile Energy restructuring just is important.The development of New-energy electric vehicle is faced with three big key technology difficult problems: entire car controller, electric machine controller and battery management system；Voltage detecting and battery balanced be two research fields important in battery management system, but universal solution is at present, employing flies electric capacity sampling and realizes voltage acquisition function, adopting active equalization to realize battery balanced, the LTC3300 chip such as Linear Er Te company is capable of set of cells and carries out the two-way active charge balancing based on transformator.
Although these schemes can solve the problem that set of cells sampling equalization function, but these chips and peripheral circuit are costly, sample circuit and equalizing circuit switch arrays substantial amounts simultaneously, are unfavorable for that low cost realizes and controls.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides the battery sampling equalizing circuit of a kind of common switch array, decrease battery management system number of switches, reduce manufacturing cost.
For reaching object above, the present invention adopts following technical proposals:
The battery sampling equalizing circuit of a kind of common switch array, including set of cells, flies capacitor sampling circuit, inverse-excitation type equalizing circuit and switch arrays, the former limit of inverse-excitation type equalizing circuit termination set of cells high voltage end of the same name, and different name end passes through metal-oxide-semiconductor Q ground connection；Inverse-excitation type equalizing circuit secondary is connected on switch arrays by switching S3, S4；Flying capacitor sampling circuit electric capacity C1 one end and be connected on switch arrays, the other end is connected on ADC by switching S1, S2.
Further, described switch arrays include switch K1--K2n, switch arrays breaker in middle K2m-1, K2m；Being connected on battery unit Bm on the left of m≤n, right side is connected on sampling capacitance C1；Switch arrays are exported signal by MCU and control.
Further, the described capacitor sampling circuit electric capacity C1 one end that flies is connected on switch S1, and the other end is connected on switch S2；The switch S1 other end is connected to ADC negative pole, and the switch S2 other end is connected to ADC positive pole.
Further, described inverse-excitation type equalizing circuit transformator M secondary different name end is connected to diode D1 one end, and the diode D1 other end is connected to balanced electric capacity C2 one end, and the balanced electric capacity C2 other end is connected on transformator M secondary Same Name of Ends；Balanced electric capacity C2 one end is connected on equalizer switch S3, and the other end is connected on equalizer switch S4；Equalizer switch S3, S4 other end is connected on switch arrays.Metal-oxide-semiconductor Q drain electrode in inverse-excitation type equalizing circuit former limit is received on the Same Name of Ends of transformator M former limit, source ground, and grid connects the input of PWM ripple.
Owing to battery is in balancing procedure, some battery unit has compensation electric current and flows through, and other batteries do not have, if carry out voltage sample when equilibrium, compensate electric current voltage on the internal resistance of cell and will have a strong impact on sampling precision, therefore, in battery management system work process, battery sampling and battery balanced in time must be separately performed.The present invention utilizes battery sampling, the battery balanced feature that can not simultaneously carry out, and uses switch arrays timesharing to the two.
Compared with prior art, the invention has the beneficial effects as follows:
By the multiplexing of switch arrays, fly electric capacity sampling and battery balanced shared one group of switch arrays, greatly reduce number of switches, alleviate software and control complexity, reduce circuit area and manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the switch arrays circuit diagram of every batteries biswitch of the battery sampling equalizing circuit of a kind of common switch array that the present invention uses；Fig. 2 is every batteries Single switch and the polar selecting switch array circuit figure of the battery sampling equalizing circuit of a kind of common switch array that the present invention uses.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are illustrated.
Embodiment one:
Referring to Fig. 1, the battery sampling equalizing circuit of a kind of common switch array, including set of cells 1, fly capacitor sampling circuit 2, inverse-excitation type equalizing circuit 3 and switch arrays 4, the described former limit of inverse-excitation type equalizing circuit 3 termination set of cells 1 of the same name high voltage end, different name end passes through metal-oxide-semiconductor Q ground connection；Inverse-excitation type equalizing circuit 3 secondary is connected on switch arrays 4 by switching S3, S4；The described capacitor sampling circuit 2 electric capacity C1 one end that flies is connected on switch arrays 4, and the other end is connected on ADC by switching S1, S2.
Embodiment two:
The present embodiment is essentially identical with embodiment one, and special feature is:
Described switch arrays 4 include switch K1--K2n, switch arrays 4 breaker in middle K2m-1And K2m, m≤n, left side is connected on battery unit Bm, and right side is connected on sampling capacitance C1.
Embodiment three:
The present embodiment is essentially identical with embodiment one, and special feature is:
The described capacitor sampling circuit 2 electric capacity C1 one end that flies is connected on switch S1, and the other end is connected on switch S2；The switch S1 other end is connected to ADC negative pole, and the switch S2 other end is connected to ADC positive pole.
Embodiment four:
The present embodiment is essentially identical with embodiment one, and special feature is:
Described inverse-excitation type equalizing circuit 3 transformator M secondary different name end is connected to diode D1 one end, and the diode D1 other end is connected to balanced electric capacity C2 one end, and the balanced electric capacity C2 other end is connected on transformator M secondary Same Name of Ends；Balanced electric capacity C2 one end is connected on equalizer switch S3, and the other end is connected on equalizer switch S4；Equalizer switch S3, S4 other end is connected on switch arrays 4；Metal-oxide-semiconductor Q drain electrode in inverse-excitation type equalizing circuit 3 former limit is received on the Same Name of Ends of transformator M former limit, source ground, and grid connects the input of PWM ripple.
Embodiment five:
The present embodiment is essentially identical with embodiment two, and special feature is:
Referring to Fig. 1, it is shown that the battery sampling equalizing circuit of a kind of common switch array；When carrying out battery voltage sampling, first, disconnect equalizer switch S3, S4, disconnect switch arrays all switches K1--K2n, disconnect sampling switch S1, S2；Secondly, Guan Bi switch K1、K2A period of time T1 (T1 is the electric capacity C1 charging interval)；Again, sampling switch K is disconnected1、K2, Guan Bi switch S1, S2；Finally, drive ADC that electric capacity C1 carries out sampling and calculate, complete the voltage sample of battery unit B1；Repeat above step, complete the voltage sample to all battery units.When carrying out battery balanced, first, disconnect sampling switch S1, S2, disconnect switch arrays all switches K1--K2n, disconnect equalizer switch S3, S4；Secondly, according to voltage sample result, the minimum battery Bi of voltage is carried out energy supplement, Guan Bi switch K2i-1, K2i, close equalizer switch S3, S4；Finally, start inverse-excitation type equalizing circuit, keep above-mentioned on off state a period of time T2 (T2 is time for balance), complete battery balanced operation.
Referring to Fig. 1, it is shown that a kind of every batteries Single switch polar selecting switch array circuit figure；Comparing Fig. 1, in switch arrays 4, battery selector switch is K1--Kn+1；S1--S4 is voltage sample polar selecting switch, when being used for keeping battery that electric capacity is charged, keeps just lower negative on voltage；S5--S8 is battery balanced polar selecting switch, is used for ensureing that euqalizing current flows into from battery forward.When battery carries out voltage sample, first, all switch (K of switch arrays are disconnected1--Kn+1, S1--S8)；Secondly, battery selector switch K is closed1, K2, voltage sample polarity switch S2, S3, allow battery unit B1 to sampling capacitance C1 charging interval T1 (T1 is to the content C1 charging interval)；Finally, drive ADC that electric capacity C1 carries out sampling to calculate；Repeat above step, complete the voltage sample to all battery units.When carrying out battery balanced, first, all switches of switch arrays are disconnected；Secondly, according to voltage sample result, the minimum battery Bi of voltage is carried out energy supplement, Guan Bi switch Ki, Ki+1And the balanced polarity switch of correspondence (odd number batteries Guan Bi S6 and S7, even number batteries Guan Bi S5 and S8)；Finally, start inverse-excitation type equalizing circuit, keep above-mentioned on off state a period of time T2 (T2 is time for balance), complete battery balanced operation.
Embodiment six:
The present embodiment is essentially identical with embodiment three, and special feature is:
The described capacitor sampling circuit 2 that flies uses sampling capacitance C1 to carry out high_voltage isolation sampling, in order to ensure sampling precision, it is necessary to calculate capacitor charging time T1, it is assumed that sampling precision require ten thousand/, T1 calculate as shown in formula (1):
T1≥(ln104) τ=9.3 τ,
τ=2RC (1)
Wherein: UcRepresenting the voltage on electric capacity, τ represents charge circuit time constant, UBiThe voltage of the i-th batteries, R is for flying electric capacity charge circuit all-in resistance, and C represents and flies electric capacity C1 value.
Claims (4)
1. the battery sampling equalizing circuit of a common switch array, including set of cells (1), fly capacitor sampling circuit (2), inverse-excitation type equalizing circuit (3) and switch arrays (4), it is characterized in that: the former limit of described inverse-excitation type equalizing circuit (3) termination set of cells (1) of the same name high voltage end, different name end passes through metal-oxide-semiconductor Q ground connection；Inverse-excitation type equalizing circuit (3) secondary is connected on switch arrays (4) by switching S3, S4；Described capacitor sampling circuit (2) the electric capacity C1 one end that flies is connected on switch arrays (4), and the other end is connected on ADC by switching S1, S2.
2. the battery sampling equalizing circuit of common switch array according to claim 1, it is characterised in that: described switch arrays (4) include switch K1--K2n, switch arrays (4) breaker in middle K2m-1And K2m, m≤n, left side is connected on battery unit Bm, and right side is connected on sampling capacitance C1.
3. the battery sampling equalizing circuit of common switch array according to claim 1, it is characterised in that: described capacitor sampling circuit (2) the electric capacity C1 one end that flies is connected on switch S1, and the other end is connected on switch S2；The switch S1 other end is connected to ADC negative pole, and the switch S2 other end is connected to ADC positive pole.
4. the battery sampling equalizing circuit of common switch array according to claim 1, it is characterized in that: described inverse-excitation type equalizing circuit (3) transformator M secondary different name end is connected to diode D1 one end, the diode D1 other end is connected to balanced electric capacity C2 one end, and the balanced electric capacity C2 other end is connected on transformator M secondary Same Name of Ends；Balanced electric capacity C2 one end is connected on equalizer switch S3, and the other end is connected on equalizer switch S4；Equalizer switch S3, S4 other end is connected on switch arrays (4)；Metal-oxide-semiconductor Q drain electrode in inverse-excitation type equalizing circuit (3) former limit is received on the Same Name of Ends of transformator M former limit, source ground, and grid connects the input of PWM ripple.
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| CN201610104589.9A CN105789715A (en) | 2016-02-25 | 2016-02-25 | Battery sampling and equalization circuits sharing switch array |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610104589.9A CN105789715A (en) | 2016-02-25 | 2016-02-25 | Battery sampling and equalization circuits sharing switch array |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106549454A (en) * | 2016-12-15 | 2017-03-29 | 深圳晶福源科技股份有限公司 | A kind of voltage sample and the conllinear battery management system of electric quantity balancing and management method |
| CN107658935A (en) * | 2017-10-20 | 2018-02-02 | 广州金升阳科技有限公司 | A kind of battery detection and equalizing system and its control method |
| CN107658936A (en) * | 2017-10-20 | 2018-02-02 | 广州金升阳科技有限公司 | A kind of battery detection and equalizing system and its control method |
| CN108134428A (en) * | 2018-01-18 | 2018-06-08 | 杭州电子科技大学 | A kind of master passively combines booster battery equalizing circuit |
| CN108134429A (en) * | 2018-01-18 | 2018-06-08 | 杭州电子科技大学 | A kind of master passively mixes decompression equalizing circuit |
| CN108306349A (en) * | 2017-01-13 | 2018-07-20 | 宁德时代新能源科技股份有限公司 | Battery equalization sampling method |
| CN109004709A (en) * | 2018-08-01 | 2018-12-14 | 乐普医学电子仪器股份有限公司 | A kind of high voltage charge circuit of variable connector switching control |
| CN110015130A (en) * | 2017-08-31 | 2019-07-16 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method and storage medium |
| CN110729789A (en) * | 2019-10-24 | 2020-01-24 | 河南理工大学 | Series battery pack equalization circuit and equalization method based on flyback converter |
| CN111030619A (en) * | 2019-12-19 | 2020-04-17 | 上海傅硅电子科技有限公司 | Audio power amplifier and method for controlling output voltage thereof |
| CN112485683A (en) * | 2020-11-18 | 2021-03-12 | 深圳芯典半导体科技有限公司 | Voltage sampling circuit of multi-lithium battery pack |
| CN112736999A (en) * | 2020-11-30 | 2021-04-30 | 浙江大有实业有限公司杭州科技发展分公司 | Series battery equalization device with multiple flyback converters |
| CN113783273A (en) * | 2021-11-15 | 2021-12-10 | 湖南九州节能科技有限公司 | Battery string rapid self-balancing charge-discharge protection circuit and control method |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106549454A (en) * | 2016-12-15 | 2017-03-29 | 深圳晶福源科技股份有限公司 | A kind of voltage sample and the conllinear battery management system of electric quantity balancing and management method |
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| CN110015130B (en) * | 2017-08-31 | 2021-01-19 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method, and storage medium |
| CN110015130A (en) * | 2017-08-31 | 2019-07-16 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method and storage medium |
| CN107658935A (en) * | 2017-10-20 | 2018-02-02 | 广州金升阳科技有限公司 | A kind of battery detection and equalizing system and its control method |
| CN107658936A (en) * | 2017-10-20 | 2018-02-02 | 广州金升阳科技有限公司 | A kind of battery detection and equalizing system and its control method |
| CN108134428A (en) * | 2018-01-18 | 2018-06-08 | 杭州电子科技大学 | A kind of master passively combines booster battery equalizing circuit |
| CN108134429A (en) * | 2018-01-18 | 2018-06-08 | 杭州电子科技大学 | A kind of master passively mixes decompression equalizing circuit |
| CN109004709A (en) * | 2018-08-01 | 2018-12-14 | 乐普医学电子仪器股份有限公司 | A kind of high voltage charge circuit of variable connector switching control |
| CN110729789A (en) * | 2019-10-24 | 2020-01-24 | 河南理工大学 | Series battery pack equalization circuit and equalization method based on flyback converter |
| CN111030619A (en) * | 2019-12-19 | 2020-04-17 | 上海傅硅电子科技有限公司 | Audio power amplifier and method for controlling output voltage thereof |
| CN112485683A (en) * | 2020-11-18 | 2021-03-12 | 深圳芯典半导体科技有限公司 | Voltage sampling circuit of multi-lithium battery pack |
| CN112736999A (en) * | 2020-11-30 | 2021-04-30 | 浙江大有实业有限公司杭州科技发展分公司 | Series battery equalization device with multiple flyback converters |
| CN113783273A (en) * | 2021-11-15 | 2021-12-10 | 湖南九州节能科技有限公司 | Battery string rapid self-balancing charge-discharge protection circuit and control method |
| CN113783273B (en) * | 2021-11-15 | 2022-04-15 | 湖南九州节能科技有限公司 | Battery string rapid self-balancing charge-discharge protection circuit and control method |
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Application publication date: 20160720 |