CN101969216A - Method for balancing serial electric quantity energy storage system - Google Patents
Method for balancing serial electric quantity energy storage system Download PDFInfo
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- CN101969216A CN101969216A CN 201010512460 CN201010512460A CN101969216A CN 101969216 A CN101969216 A CN 101969216A CN 201010512460 CN201010512460 CN 201010512460 CN 201010512460 A CN201010512460 A CN 201010512460A CN 101969216 A CN101969216 A CN 101969216A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000178 monomer Substances 0.000 claims abstract description 109
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000009825 accumulation Methods 0.000 claims description 8
- 230000005059 dormancy Effects 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000005183 dynamical system Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a method for balancing serial electric quantity energy storage. The method comprises the following steps: performing voltage sampling on each energy storage monomer in a serial electric quantity energy storage system to obtain the actual voltage value of each energy storage monomer; dynamically calculating a current voltage average value that each energy storage monomer of the energy storage system is expected to have to obtain a limit value of the current voltage average value; comparing the actual voltage value of each energy storage monomer with the limit value of the current voltage average value; after finding monomers of which the actual voltage values are lower than the limit value of the current voltage average value, starting a switch power supply to charge the energy storage monomers of which the actual voltage values are lower than the limit value of the current voltage average value one by one; dynamically monitoring the actual voltage value of each energy storage monomer during the charge, dynamically updating and calculating the current voltage average value that each energy storage monomer of the energy storage system is expected to have in real time, and obtaining the limit value of current voltage average value at the same time; and when the actual voltage value of the charged monomer reaches the current voltage average value, stopping charging the monomer.
Description
Technical field
The present invention relates to a kind of series connection electric weight energy-storage system equalization methods, belong to energy storage monomer balanced management technical field.
Background technology
Lithium-ions battery, super capacitor develop rapidly in each application of new forms of energy in recent years, but in use spill an outstanding problem cruelly---balancing energy problem between each monomer in the module.Because lithium-ions battery, the restriction of super capacitor manufacturing process principle, the monomer whose ceiling voltage has only 4.2V respectively, 2.7V, some aqueous super electric capacity monomer ceiling voltage is lower, has only 1.2V, therefore these energy storage devices module of forming certain voltage that must at first be together in series could use as dynamical system, common module voltage is 24V, 36V, 48V etc., module in groups in use, because the difference of monomer characteristic, especially the difference of capacity and self-discharge characteristics, make interior each monomer of module fill, discharge and leave standstill (stock, system does not work) etc. state can to show with voltage down be that the electric weight of representative is inconsistent, the inconsistent meeting that adds up gradually makes the voltage between each monomer reach the degree that system is difficult to operate as normal, such as a battery pack or super capacitor module, because wherein other monomer is big in certain monomer self discharge current ratio group, because whenever self discharge all exists, no matter this serial module structure is charging, the discharge or leave standstill, this monomer voltage is got off in long-term accumulation can be lower than other monomer, this has just had a strong impact on the charging and discharging capabilities of entire module, especially for the super capacitor module, because it is zero that super-capacitor module allows the discharge of module global voltage in some use occasions, this just causes the interior monomer electric weight of module not put, some monomers form the result of negative pressure.
In order to solve the equalization problem between the monomer in the module, domestic, foreign technology personnel have carried out a large amount of technical research work, and relevant patented technology is also a lot, mainly is divided into two classes:
1) equalization discharge: the major technique thinking is paralleling switch pipe and a power resistor between each monomer both positive and negative polarity in module, detect monomer voltage in the module charging process, when certain monomer voltage reaches in limited time, the conducting of control switch pipe, make power resistor in parallel to this monomer discharge, module system still charges, and reaches the effect of certain peak load shifting;
2) shift equilibrium: Deutsche Bundespatent technology that on behalf of China research institute, its typical case introduce, each Switching Power Supply conversion module in parallel of each monomer both positive and negative polarity in the module, when certain monomer took the lead in reaching upper voltage limit, the starting switch power module was transferred to the electric weight of this monomer on other module of module in the charging process.
The subject matter of above-mentioned first kind of scheme, the discharge resistance heating is serious, cause waste of energy simultaneously, and the equalizing system volume is bigger.The subject matter of above-mentioned second kind of scheme is in order to reach portfolio effect preferably in charging process, plays the switch power supply current of electric weight transferance and will try one's best greatly, and in actual the realization, this system's heating seriously.
Summary of the invention
The purpose of this invention is to provide a kind of series connection electric weight energy storage equalization methods, discharge resistance generates heat seriously in the balanced management process of discharging between the series connection electric weight energy-storage system monomer to solve, the problem of waste of energy.
For achieving the above object, a kind of series connection electric weight energy-storage system equalization methods of the present invention, this method step is as follows:
(1) equalizing system is regularly carried out voltage sample to obtain the actual voltage value of each energy storage monomer to each the energy storage monomer in the series connection electric weight energy-storage system;
(2) the single energy storage monomer of the dynamic calculation energy-storage system current average voltage that should have, and obtain current average voltage limit value;
(3) relatively with the actual voltage value of each energy storage monomer and current average voltage limit value, if when not finding that any monomer actual voltage value is lower than current average voltage limit value, the equalizing system dormancy;
When (4) having actual voltage value to be lower than the monomer of current average voltage limit value as if discovery, the starting switch power supply charges one by one to the energy storage monomer that is lower than current average voltage limit value, the actual voltage value of each energy storage monomer of dynamic monitoring and dynamically update the current average voltage that the single energy storage monomer that calculates energy-storage system should have in real time and obtain current average voltage limit value simultaneously in charging process, when being recharged the monomer actual voltage value and reaching current average voltage, stop its charging;
(5) when being lower than current average voltage limit value without any the monomer actual voltage value, the off switch power supply stops to each monomer voltage sampling the equalizing system dormancy.
Equalizing system is divided into park mode and timing wake mode in the described step (1), when regularly reviving each the energy storage monomer in the series connection electric weight energy-storage system is carried out voltage sample.
The interval of regularly reviving in the described step (1) is adjusted according to the different user modes of series connection accumulation system.
Average voltage is to obtain according to the actual voltage value of each the energy storage monomer that records in real time and the number dynamic calculation of energy storage monomer in the described step (2).
The average voltage limit value is to obtain according to the definite value that average voltage deducts setting in the described step (2).
When certain energy storage monomer voltage was lower than the average voltage limit value, the Switching Power Supply conversion module charged to reach current average voltage to this energy storage monomer by switchable relay in the described step (4).
The input voltage range of Switching Power Supply conversion module should be fit to the permission change in voltage scope of series connection accumulation entire system in the described step (4), and its output should be fit to by the monomer voltage of equilibrium, and output voltage is controlled, and input and output should be isolated.
This method is applied to connect in the electric weight energy-storage system life-cycle process.
A kind of series connection electric weight energy storage equalization methods of the present invention, revise and average voltage limit value energy storage monomer devious by replenishing one by one, whole series connection electric weight energy-storage system is reached in a kind of controlled balanced scope, owing to be to carry out equilibrium, can not occur therefore that the discharge resistance heating is serious, the problem of waste of energy by the mode that electric weight efficiently shifts.And the series connection electric weight energy-storage system long-term work at any time of use the inventive method, the output current of switching voltage conversion module can be very big, during the equipment rest of working power module, balanced operation between the energy storage monomer is still in work, and less charging current can remedy unbalanced between the module that energy storage monomer difference causes in the module fully.
Embodiment
Series connection electric weight energy-storage system equalization methods of the present invention, this method step is as follows:
(1) equalizing system is regularly carried out voltage sample to obtain the actual voltage value of each energy storage monomer to each the energy storage monomer in the series connection electric weight energy-storage system;
(2) the single energy storage monomer of the dynamic calculation energy-storage system current average voltage that should have, and obtain current average voltage limit value;
(3) relatively with the actual voltage value of each energy storage monomer and current average voltage limit value, if when not finding that any monomer actual voltage value is lower than current average voltage limit value, the equalizing system dormancy;
When (4) having actual voltage value to be lower than the monomer of current average voltage limit value as if discovery, the starting switch power supply charges one by one to the energy storage monomer that is lower than current average voltage limit value, the actual voltage value of each energy storage monomer of dynamic monitoring and dynamically update the current average voltage that the single energy storage monomer that calculates energy-storage system should have in real time and obtain current average voltage limit value simultaneously in charging process, when being recharged the monomer actual voltage value and reaching current average voltage, stop its charging;
(5) when being lower than current average voltage limit value without any the monomer actual voltage value, the off switch power supply stops to each monomer voltage sampling the equalizing system dormancy.
Equalizing system is divided into park mode and timing wake mode in the step (1), when regularly reviving each the energy storage monomer in the series connection electric weight energy-storage system is carried out voltage sample.Regularly the interval of reviving is adjusted according to the different user modes of series connection accumulation system.Average voltage is to obtain according to the actual voltage value of each the energy storage monomer that records in real time and the number dynamic calculation of energy storage monomer in the described step (2).The average voltage limit value is to obtain according to the definite value that average voltage deducts setting.When certain energy storage monomer voltage was lower than the average voltage limit value, the Switching Power Supply conversion module charged to reach current average voltage to this energy storage monomer by switchable relay in the step (4).The input voltage range of Switching Power Supply conversion module should be fit to the permission change in voltage scope of series connection accumulation entire system, and its output should be fit to by the monomer voltage of equilibrium, and output voltage is controlled, and input and output should be isolated.This method is applied to connect in the electric weight energy-storage system life-cycle process.
Specifically, the series connection electric weight energy-storage system of a kind of electric weight energy storage equalization methods of connecting of the present invention is in series by n energy storage monomer Ri, wherein
,
, m Switching Power Supply conversion module (
) input is connected between the both positive and negative polarity of series connection electric weight energy storage group, one balanced control board links to each other with each energy storage monomer both positive and negative polarity respectively by resistor network or isolation voltage transducer, be used for detecting in real time the voltage of each energy storage monomer, this equilibrium control board can be controlled above-mentioned m Switching Power Supply conversion module startup respectively or close, and corresponding n the relay control of the output of this m Switching Power Supply conversion module is to realize the charging to each energy storage monomer.Balanced control board regularly detects the voltage of each energy storage monomer in the series connection electric weight energy-storage system, when detecting certain monomer voltage and be lower than the limit value of current average monomer voltage, the control switching conversion module is this energy storage monomer charging by switchable relay (electronics or machinery), makes this energy storage monomer voltage reach average voltage level.
The input and output of Switching Power Supply conversion module are isolated by pulse transformer, input range adapts to series connection electric weight energy-storage system minimum and maximum voltage, if energy storage monomer super capacitor, then corresponding super-capacitor module can be set its minimum input voltage half (or lower) for series connection electric weight energy-storage system ceiling voltage; Output voltage adapts to the monomer voltage requirement.Balanced control board mode of operation is divided into dormancy and regularly revives, fixed time interval can be adjusted according to the different user modes of serial power energy-storage module, when leaving standstill, module can adopt the long time interval, power consumption with further minimizing balanced management system, in case the unnecessary power consumption that causes when the module long period leaves standstill, comparatively fast the way of frequency even continuous monitoring equilibrium remedies between the series connection accumulation monomer because the voltage differences that property differences such as capacity cause when the module charge and discharge.
When detecting certain energy storage monomer voltage and be lower than the average voltage limit value, the control switching conversion module is this monomer charging by switchable relay (electronics or machinery), make this monomer voltage reach module average monomer magnitude of voltage, because this system long-term work at any time, the output current of Switching Power Supply conversion module can be very big (being defined as 1A gets final product, efficient can be accomplished more than 90%), during the equipment rest of working power module, this balanced management system still can be worked, and less charging current can remedy in the module that monomer difference causes in the module unbalanced between each monomer fully.Revise monomer devious by replenishing one by one like this, whole system is reached in a kind of controlled balanced scope.
Above-mentioned at series connection electric weight energy-storage system; be not limited only to monomer series-connected battery, the capacitor system of discharging and recharging; also can for the group be unit series connection discharge and recharge equilibrium between the balanced and group in battery pack, the capacitance group group; as long as the equalization methods that has used the present invention to propose all should belong to protection scope of the present invention.
Claims (8)
1. series connection electric weight energy-storage system equalization methods is characterized in that this method step is as follows:
(1) equalizing system is regularly carried out voltage sample to obtain the actual voltage value of each energy storage monomer to each the energy storage monomer in the series connection electric weight energy-storage system;
(2) the single energy storage monomer of the dynamic calculation energy-storage system current average voltage that should have, and obtain current average voltage limit value;
(3) relatively with the actual voltage value of each energy storage monomer and current average voltage limit value, if when not finding that any monomer actual voltage value is lower than current average voltage limit value, the equalizing system dormancy;
When (4) having actual voltage value to be lower than the monomer of current average voltage limit value as if discovery, the starting switch power supply charges one by one to the energy storage monomer that is lower than current average voltage limit value, the actual voltage value of each energy storage monomer of dynamic monitoring and dynamically update the current average voltage that the single energy storage monomer that calculates energy-storage system should have in real time and obtain current average voltage limit value simultaneously in charging process, when being recharged the monomer actual voltage value and reaching current average voltage, stop its charging;
(5) when being lower than current average voltage limit value without any the monomer actual voltage value, the off switch power supply stops to each monomer voltage sampling the equalizing system dormancy.
2. method according to claim 1 is characterized in that: equalizing system is divided into park mode and timing wake mode in the described step (1), when regularly reviving each the energy storage monomer in the series connection electric weight energy-storage system is carried out voltage sample.
3. method according to claim 2 is characterized in that: the interval of regularly reviving in the described step (1) is adjusted according to the different user modes of series connection accumulation system.
4. method according to claim 1 is characterized in that: average voltage is to obtain according to the actual voltage value of each the energy storage monomer that records in real time and the number dynamic calculation of energy storage monomer in the described step (2).
5. method according to claim 4 is characterized in that: the average voltage limit value is to obtain according to the definite value that average voltage deducts setting in the described step (2).
6. method according to claim 1, it is characterized in that: when certain energy storage monomer voltage was lower than the average voltage limit value, the Switching Power Supply conversion module charged to reach current average voltage to this energy storage monomer by switchable relay in the described step (4).
7. method according to claim 6, it is characterized in that: the input voltage range of Switching Power Supply conversion module should be fit to the permission change in voltage scope of series connection accumulation entire system in the described step (4), its output should be fit to by the monomer voltage of equilibrium, output voltage is controlled, and input and output should be isolated.
8. according to each described method among the claim 1-7, it is characterized in that: this method is applied to connect in the electric weight energy-storage system life-cycle process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010512460 CN101969216B (en) | 2010-10-20 | 2010-10-20 | Method for balancing serial electric quantity energy storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010512460 CN101969216B (en) | 2010-10-20 | 2010-10-20 | Method for balancing serial electric quantity energy storage system |
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| Publication Number | Publication Date |
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| CN101969216A true CN101969216A (en) | 2011-02-09 |
| CN101969216B CN101969216B (en) | 2013-07-17 |
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| CN 201010512460 Expired - Fee Related CN101969216B (en) | 2010-10-20 | 2010-10-20 | Method for balancing serial electric quantity energy storage system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298119A (en) * | 2011-05-24 | 2011-12-28 | 惠州Tcl移动通信有限公司 | Device and method for displaying battery power |
| CN103499728A (en) * | 2013-07-19 | 2014-01-08 | 上海磁浮交通工程技术研究中心 | Method and system for detecting voltage unbalance of series capacitor bank |
| CN105471010A (en) * | 2014-09-05 | 2016-04-06 | 湖南南车时代电动汽车股份有限公司 | Voltage balancing method and system for super capacitor module |
| CN114742447A (en) * | 2022-04-26 | 2022-07-12 | 哈尔滨理工大学 | Estimation method and device for echelon utilization evaluation index of single battery and energy storage battery system |
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| JP2003134675A (en) * | 2001-10-16 | 2003-05-09 | Nissan Motor Co Ltd | Voltage detector for battery pack |
| WO2009078136A1 (en) * | 2007-12-18 | 2009-06-25 | Panasonic Corporation | Voltage equalization circuit |
| CN101606299A (en) * | 2007-02-09 | 2009-12-16 | Sk能源株式会社 | Equalizing charging equipment |
| CN201478865U (en) * | 2009-08-14 | 2010-05-19 | 天津力神特种电源科技有限公司 | Improved charging balanced circuit |
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2010
- 2010-10-20 CN CN 201010512460 patent/CN101969216B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003134675A (en) * | 2001-10-16 | 2003-05-09 | Nissan Motor Co Ltd | Voltage detector for battery pack |
| CN101606299A (en) * | 2007-02-09 | 2009-12-16 | Sk能源株式会社 | Equalizing charging equipment |
| WO2009078136A1 (en) * | 2007-12-18 | 2009-06-25 | Panasonic Corporation | Voltage equalization circuit |
| CN201478865U (en) * | 2009-08-14 | 2010-05-19 | 天津力神特种电源科技有限公司 | Improved charging balanced circuit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298119A (en) * | 2011-05-24 | 2011-12-28 | 惠州Tcl移动通信有限公司 | Device and method for displaying battery power |
| CN102298119B (en) * | 2011-05-24 | 2015-12-02 | 惠州Tcl移动通信有限公司 | Battery electric quantity display device and method |
| CN103499728A (en) * | 2013-07-19 | 2014-01-08 | 上海磁浮交通工程技术研究中心 | Method and system for detecting voltage unbalance of series capacitor bank |
| CN105471010A (en) * | 2014-09-05 | 2016-04-06 | 湖南南车时代电动汽车股份有限公司 | Voltage balancing method and system for super capacitor module |
| CN105471010B (en) * | 2014-09-05 | 2018-05-29 | 湖南南车时代电动汽车股份有限公司 | The voltage balancing method and system of super capacitor module |
| CN114742447A (en) * | 2022-04-26 | 2022-07-12 | 哈尔滨理工大学 | Estimation method and device for echelon utilization evaluation index of single battery and energy storage battery system |
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| Publication number | Publication date |
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| CN101969216B (en) | 2013-07-17 |
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