CN103208827A - Balance control system and method for high-capacity serial connected battery packs - Google Patents
Balance control system and method for high-capacity serial connected battery packs Download PDFInfo
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- CN103208827A CN103208827A CN2012100164816A CN201210016481A CN103208827A CN 103208827 A CN103208827 A CN 103208827A CN 2012100164816 A CN2012100164816 A CN 2012100164816A CN 201210016481 A CN201210016481 A CN 201210016481A CN 103208827 A CN103208827 A CN 103208827A
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Abstract
The invention relates to a balance control system combining electricity compensation with resistance dissipation in an energy storage system. The balance control system comprises battery packs, an electricity compensation balance control portion and a dissipation balance control portion. The balance scheme and the control mode include that each unit battery corresponds to an electricity compensation balance circuit, and the electricity compensation balance is started when the voltage of each unit battery is low; and simultaneously, each unit battery is connected in parallel with a dissipation resistor, and when the voltage of the individual battery is high during charging, dissipation control switches are started to enable the batteries to discharge through serial connected resistors, so that the battery packs and a compensation power supply are protected. Compared with a pure resistor dissipative balance scheme, the balance control system has the advantages that only the balance resistors of the individual batteries with high voltages work, so that the heat can be ignored, and heat management loads can be added. Energy of the compensation power supply is fully used, thermal losses are small, the energy conversion efficiency of a management system is improved greatly, a plurality of batteries can be balanced simultaneously, the balancing speed is increased, and the balancing time is shortened.
Description
Technical field
The present invention relates to a kind of big capacity series battery equalizing system and control mode, be applied to lithium ion battery and lead-acid battery etc. as grid-connected power generation system, intelligent grid, microgrid electricity generation system, bank ATM machine and the UPS etc. of energy-accumulating medium.
Background technology
Battery balancing technique in groups is one of key technology that ensures the normal operation of energy-storage system.Extensive energy storage need get up to obtain bigger stored energy capacitance and higher power output with a plurality of cell connection in series-parallel, and the energy storage size of battery pack depends on the charge-discharge characteristic that differs from a batteries most.Because the battery manufacture process itself has certain discrete feature, and along with the battery growth of service time, the mutual difference of battery performance is more outstanding.If battery is not carried out balanced management, along with charge and discharge cycles is carried out, the inconsistency between cell can cause and owe charging, overcharge and overdischarge, has a strong impact on serviceability and the life-span of battery pack, and can cause serious potential safety hazard.So, need judge monomer and battery pack state by battery management system, optimize the outside batteries parameter, increase battery life, the protection battery.
Balance module is the important component part of battery management system, and equalization scheme commonly used is divided into energy dissipation type and energy non-dissipative type.The energy dissipation type the most normal use be the shunt resistance equalization, as shown in Figure 1, with each battery parallel resistance, by control equalizer switch control shunt current, the method circuit is simple, and control realizes easily, but shunt resistance can produce big calorimetric, strengthens the difficulty of heat management, causes energy dissipation.What energy non-dissipative type was commonly used has inductance and power switch pipe method, transformer energy transfer method and mend the electrical equalization method: inductance and power switch pipe method are applicable to little current applications; The transformer energy transfer method transfers energy in the low battery of voltage by transformer, and this scheme energy content of battery is fully utilized, balanced efficient height, but secondary winding is difficult to coupling, and transformer leakage inductance is difficult to control, is unfavorable for modularization; As shown in Figure 2, mending the electrical equalization scheme adopts the insulating power supply module to realize that energy shifts, realize that by control insulating power supply module energy flows, this balanced way efficient height, control realizes easily, but suppose that certain cell lost efficacy, be filled very soon during charging, voltage is higher, according to control strategy, other monomer all will be opened equalizing circuit, and the long-term overload operation of balanced power supply can cause power supply to damage.
Summary of the invention
The invention provides a kind of battery pack balancing control system that is applicable to generation of electricity by new energy and microgrid electrification energy storage system, in energy-storage system, adopt a kind of battery pack balancing scheme that electricity combines with the resistance dissipation of mending.
For achieving the above object, the present invention takes following technical scheme:
A kind of big capacity series battery balance control system, comprise battery pack, balanced control unit, voltage acquisition unit, microcontroller, mend the electrical equalization control section and the balanced control section that dissipates, mend the electrical equalization control section and comprise DC-DC insulating power supply module, mend electric control switch and mend power supply, electric control switch and in parallel with the benefit power supply is mended in the input series connection of DC-DC insulating power supply module, output series connection counnter attack diode and the current-limiting resistance of DC-DC insulating power supply module, and in parallel with each cell in the battery pack, mend electric control switch and be electrically connected with balanced control unit; The balanced control section that dissipates comprises resistance for dissipation and dissipative control switch, dissipative control switch series connection resistance for dissipation and in parallel with each cell in the battery pack, the dissipative control switch also respectively with balanced control unit, the corresponding electrical connection of voltage acquisition unit; Balanced control unit is electrically connected with microcontroller, and voltage acquisition unit is connected with the microcontroller bus communication, and voltage acquisition unit and the corresponding electrical connection of each cell in the battery pack.Described voltage acquisition unit is made up of voltage signal acquisition chip and filter circuit, and described benefit power supply is battery pack or outside independent current source, and described dissipative control switch is started by microprocessor controls or started by the balanced acquisition chip control of controlling function of band.
Above-mentioned balanced control unit refers to corresponding one tunnel benefit electrical equalization control channel of each cell, and the balanced control unit in every road is formed with the balanced control section that dissipates by mending the electrical equalization control section.Balanced control principle of the present invention is as follows: charge and when leaving standstill, when certain battery cell voltage is lower than battery pack average voltage (average voltage=battery pack terminal voltage/battery number) 0.05V, open the benefit electric control switch of the balanced control unit of this monomer, mending power supply mends for this cell by DC-DC insulating power supply module, cell voltage raises fast, when near average voltage, turn-off and mend electric control switch.During charging, suppose that certain cell is filled electricity very soon, voltage is higher, is higher than average voltage 0.05V, opens the dissipative control switch of the balanced control unit of this monomer, and the portion of energy of battery reduces the voltage of battery by resistance for dissipation consumption.During discharge; if monomer battery voltage is lower than battery pack average voltage 0.05V; open the benefit electric control switch of the balanced control unit of this cell; make and mend electric power supply energy by DC-DC insulating power supply module participation discharge; alleviate the burden of battery, play the effect of protection battery, make the energy of mending power supply be fully utilized; thermal losses is little, has greatly improved the energy conversion efficiency of management system.
The balanced control flow of realizing above-mentioned big capacity series battery balance control system is as follows: charge and when leaving standstill, voltage acquisition unit is gathered battery voltage signal, arrive microcontroller by bus transfer, the monomer voltage signal and the average voltage that collect are compared, if certain monomer battery voltage is lower than average voltage 0.05V, start and mend the electrical equalization control section, the corresponding I/O mouth of microcontroller output low level, DC-DC insulating power supply module startup work, by current-limiting resistance and counnter attack diode, give this cell charging; Suppose that certain cell voltage rising speed in charging process is fast, when its voltage is higher than average voltage 0.05V, start this cell balanced control section that dissipates, the corresponding I/O mouth of microcontroller output low level, open the dissipative control switch, reach balanced control purpose by resistance for dissipation, make that the monomer battery voltage maximum differential pressure maintains in the 0.1V in the battery pack.
Balanced control scheme of the present invention is applicable to intermediate size and big capacity series battery energy-storage system.To mend electrical equalization and the resistance balanced control mode that dissipates and combine, corresponding one of each cell is mended the electrical equalization circuit, starts when monomer battery voltage is low and mends electrical equalization; Simultaneously, each cell resistance for dissipation in parallel individual cell voltage occurs when higher when charging, start the dissipative control switch and discharge by parallel resistance by these batteries, the effect of playing the protection battery pack and mending power supply.Mend electricity and also can produce certain heat in actual applications with the equalization scheme that the resistance dissipation combines, but compare with pure resistance dissipative type equalization scheme, only be the equalizing resistance work of the higher battery of individual voltages, heat can be ignored, and can not increase the weight of the burden of battery thermal management.The energy of mending power supply is fully utilized, and thermal losses is little, has greatly improved the energy conversion efficiency of management system, and a plurality of batteries can be balanced simultaneously, improved balancing speed, shortened time for balance.
Description of drawings
Fig. 1 is resistance dissipative type equalizing circuit schematic diagram;
Fig. 2 mends the electrical equalization circuit diagram;
Fig. 3 is balance control system structure chart of the present invention;
Fig. 4 is the balanced control of the present invention software flow pattern.
Embodiment
Below in conjunction with drawings and Examples content of the present invention is described further.
As shown in Figure 3, a kind of big capacity series battery balance control system, comprise battery pack, balanced control unit, voltage acquisition unit, microcontroller, mend the electrical equalization control section and the balanced control section that dissipates, mend the electrical equalization control section and comprise DC-DC insulating power supply module, mend electric control switch and mend power supply, electric control switch and in parallel with the benefit power supply is mended in the input series connection of DC-DC insulating power supply module, output series connection counnter attack diode and the current-limiting resistance of DC-DC insulating power supply module, and in parallel with each cell in the battery pack, mend electric control switch and be electrically connected with balanced control unit; The balanced control section that dissipates comprises resistance for dissipation and dissipative control switch, dissipative control switch series connection resistance for dissipation and in parallel with each cell in the battery pack, the dissipative control switch also respectively with balanced control unit, the corresponding electrical connection of voltage acquisition unit; Balanced control unit is electrically connected with microcontroller, and voltage acquisition unit is connected with the microcontroller bus communication, and voltage acquisition unit and the corresponding electrical connection of each cell in the battery pack.Described voltage acquisition unit is made up of voltage signal acquisition chip and filter circuit, and described benefit power supply is battery pack or outside independent current source, and described dissipative control switch is started by microprocessor controls or started by the balanced acquisition chip control of controlling function of band.
As shown in Figure 4, the balanced control flow of realizing above-mentioned big capacity series battery balance control system is as follows: charge and when leaving standstill, voltage acquisition unit is gathered battery voltage signal, arrive microcontroller by bus transfer, the monomer voltage signal and the average voltage that collect are compared, if certain monomer battery voltage is lower than average voltage 0.05V, start and mend the electrical equalization control section, the corresponding I/O mouth of microcontroller output low level, DC-DC insulating power supply module startup work, by current-limiting resistance and counnter attack diode, give this cell charging; Suppose that certain cell voltage rising speed in charging process is fast, when its voltage is higher than average voltage 0.05V, start this cell balanced control section that dissipates, the corresponding I/O mouth of microcontroller output low level, open the dissipative control switch, reach balanced control purpose by resistance for dissipation, make that the monomer battery voltage maximum differential pressure maintains in the 0.1V in the battery pack.
Battery balanced control is the important component part of battery management, can carry out the cascade expansion according to practical situations.Mounting, commissioning and maintenance for convenience is divided into battery pack several parts usually, forms the standard cell bag with battery management unit, manages respectively, and each standard cell bag is managed concentratedly by central control unit again.Obviously; above-mentioned embodiment of the present invention only is for example of the present invention clearly is described; and be not to be restriction to embodiment of the present invention; for those of ordinary skill in the field; can also be easy to make other pro forma variation on the basis of the above description or substitute, and these changes or substitute also will be included within the protection range that the present invention determines.
Claims (5)
1. one kind big capacity series battery balance control system, comprise battery pack, it is characterized in that: also comprise balanced control unit, voltage acquisition unit, microcontroller, mend the electrical equalization control section and the balanced control section that dissipates, mend the electrical equalization control section and comprise DC-DC insulating power supply module, mend electric control switch and mend power supply, electric control switch and in parallel with the benefit power supply is mended in the input series connection of DC-DC insulating power supply module, output series connection counnter attack diode and the current-limiting resistance of DC-DC insulating power supply module, and in parallel with each cell in the battery pack, mend electric control switch and be electrically connected with balanced control unit; The balanced control section that dissipates comprises resistance for dissipation and dissipative control switch, dissipative control switch series connection resistance for dissipation and in parallel with each cell in the battery pack, the dissipative control switch also respectively with balanced control unit, the corresponding electrical connection of voltage acquisition unit; Balanced control unit is electrically connected with microcontroller, and voltage acquisition unit is connected with the microcontroller bus communication, and voltage acquisition unit and the corresponding electrical connection of each cell in the battery pack.
2. big capacity series battery balance control system as claimed in claim 1, it is characterized in that: described voltage acquisition unit is made up of voltage signal acquisition chip and filter circuit.
3. big capacity series battery balance control system as claimed in claim 1, it is characterized in that: described benefit power supply is battery pack or outside independent current source.
4. big capacity series battery balance control system as claimed in claim 1 is characterized in that: described dissipative control switch is started by microprocessor controls or by the acquisition chip control startup of the balanced control function of band.
5. realize the balanced control mode of the described big capacity series battery balance control system of claim 1, it is characterized in that: charge and when leaving standstill, voltage acquisition unit is gathered battery voltage signal, arrive microcontroller by bus transfer, the monomer voltage signal and the average voltage that collect are compared, if certain monomer battery voltage is lower than average voltage 0.05V, start and mend the electrical equalization control section, the corresponding I/O mouth of microcontroller output low level, DC-DC insulating power supply module startup work, by current-limiting resistance and counnter attack diode, give this cell charging; Suppose that certain cell voltage rising speed in charging process is fast, when its voltage is higher than average voltage 0.05V, start this cell balanced control section that dissipates, the corresponding I/O mouth of microcontroller output low level, open the dissipative control switch, reach balanced control purpose by resistance for dissipation, make that the monomer battery voltage maximum differential pressure maintains in the 0.1V in the battery pack.
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| CN2012100164816A CN103208827A (en) | 2012-01-17 | 2012-01-17 | Balance control system and method for high-capacity serial connected battery packs |
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| CN2012100164816A CN103208827A (en) | 2012-01-17 | 2012-01-17 | Balance control system and method for high-capacity serial connected battery packs |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762626A (en) * | 2013-12-31 | 2014-04-30 | 江苏嘉钰新能源技术有限公司 | Equalizing charge control circuit |
| CN106026256A (en) * | 2016-06-23 | 2016-10-12 | 北京理工大学 | Bidirectional balance system and method for storage battery |
| CN106532151A (en) * | 2016-12-07 | 2017-03-22 | 上海空间电源研究所 | Balance execution apparatus for single lithium ion storage battery |
| CN107251272A (en) * | 2015-01-26 | 2017-10-13 | 罗伯特·博世有限公司 | The device of switch and thermal insulation structure with heat insulation |
| WO2017197631A1 (en) * | 2016-05-20 | 2017-11-23 | 深圳市道通智能航空技术有限公司 | Battery pack balancing circuit |
| CN108242831A (en) * | 2016-12-27 | 2018-07-03 | 财团法人船舶暨海洋产业研发中心 | battery management system control method |
| CN108288868A (en) * | 2018-03-30 | 2018-07-17 | 北京国能电池科技股份有限公司 | Active equalization device, battery management system and electric vehicle |
| WO2019099213A1 (en) * | 2017-11-15 | 2019-05-23 | Nova Semiconductor, Inc. | Methods and systems for managing multi-cell batteries |
| CN109904885A (en) * | 2017-12-08 | 2019-06-18 | 神讯电脑(昆山)有限公司 | Battery pack pressure difference automatic balancing arrangement |
| CN111313117A (en) * | 2020-03-27 | 2020-06-19 | 华霆（合肥）动力技术有限公司 | Lossless passive equalization method and device for battery module and battery system |
| CN112865205A (en) * | 2019-11-12 | 2021-05-28 | 中国科学院沈阳自动化研究所 | System and method for controlling dissipation balance of starting power supply of unmanned helicopter engine |
| CN113725977A (en) * | 2021-09-06 | 2021-11-30 | 吴才荣 | Charging and recharging circuit for series storage battery pack |
| CN113954693A (en) * | 2021-10-11 | 2022-01-21 | 暨南大学 | Lithium battery balance control method, system and storage medium |
| CN114069749A (en) * | 2020-08-07 | 2022-02-18 | 明创能源股份有限公司 | Rechargeable battery system with multiple-stage battery core and alternative power supply device |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762626A (en) * | 2013-12-31 | 2014-04-30 | 江苏嘉钰新能源技术有限公司 | Equalizing charge control circuit |
| CN107251272B (en) * | 2015-01-26 | 2020-06-16 | 罗伯特·博世有限公司 | Device with thermally insulated switch and thermally insulated structure |
| CN107251272A (en) * | 2015-01-26 | 2017-10-13 | 罗伯特·博世有限公司 | The device of switch and thermal insulation structure with heat insulation |
| WO2017197631A1 (en) * | 2016-05-20 | 2017-11-23 | 深圳市道通智能航空技术有限公司 | Battery pack balancing circuit |
| CN106026256A (en) * | 2016-06-23 | 2016-10-12 | 北京理工大学 | Bidirectional balance system and method for storage battery |
| CN106532151A (en) * | 2016-12-07 | 2017-03-22 | 上海空间电源研究所 | Balance execution apparatus for single lithium ion storage battery |
| CN108242831B (en) * | 2016-12-27 | 2021-08-03 | 财团法人船舶暨海洋产业研发中心 | Battery management system control method |
| CN108242831A (en) * | 2016-12-27 | 2018-07-03 | 财团法人船舶暨海洋产业研发中心 | battery management system control method |
| WO2019099213A1 (en) * | 2017-11-15 | 2019-05-23 | Nova Semiconductor, Inc. | Methods and systems for managing multi-cell batteries |
| CN109904885A (en) * | 2017-12-08 | 2019-06-18 | 神讯电脑(昆山)有限公司 | Battery pack pressure difference automatic balancing arrangement |
| CN108288868A (en) * | 2018-03-30 | 2018-07-17 | 北京国能电池科技股份有限公司 | Active equalization device, battery management system and electric vehicle |
| CN112865205A (en) * | 2019-11-12 | 2021-05-28 | 中国科学院沈阳自动化研究所 | System and method for controlling dissipation balance of starting power supply of unmanned helicopter engine |
| CN111313117A (en) * | 2020-03-27 | 2020-06-19 | 华霆（合肥）动力技术有限公司 | Lossless passive equalization method and device for battery module and battery system |
| CN114069749A (en) * | 2020-08-07 | 2022-02-18 | 明创能源股份有限公司 | Rechargeable battery system with multiple-stage battery core and alternative power supply device |
| CN113725977A (en) * | 2021-09-06 | 2021-11-30 | 吴才荣 | Charging and recharging circuit for series storage battery pack |
| CN113954693A (en) * | 2021-10-11 | 2022-01-21 | 暨南大学 | Lithium battery balance control method, system and storage medium |
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Application publication date: 20130717 |