CN102593882A - Energy balancing device for batteries in battery pack - Google Patents
Energy balancing device for batteries in battery pack Download PDFInfo
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- CN102593882A CN102593882A CN2011103609075A CN201110360907A CN102593882A CN 102593882 A CN102593882 A CN 102593882A CN 2011103609075 A CN2011103609075 A CN 2011103609075A CN 201110360907 A CN201110360907 A CN 201110360907A CN 102593882 A CN102593882 A CN 102593882A
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Abstract
The invention discloses an energy balancing device for batteries in a batter pack, which comprises an energy balancing capacitor, a plurality of metal oxide semiconductor (MOS) tube switch circuits, a plurality of driving circuits, a capacitor voltage detection circuit and a main control circuit. Each MOS tube switch circuit is connected between a corresponding battery and the energy balancing capacitor; each output end of the plurality of driving circuits is connected with a corresponding MOS tube switch circuit; and the voltage of each battery is detected by the main control circuit through the capacitor voltage detection circuit. When a battery with an over high voltage is monitored, the main control circuit controls a corresponding MOS tube switch circuit to be closed to charge the energy balancing capacitor, after the charging is finished, the MOS tube switch circuit is opened, a MOS tube switch circuit corresponding to a battery with a low voltage is closed, the energy balancing capacity charges the single battery, so repeats, the energy is intactly transmitted from a battery with a high voltage to a battery with a low voltage, and the energy is balanced among batteries. According to the energy balancing device, intact energy balance among single batteries is fast achieved, and the defect of prior unbalanced energy among lithium batteries is overcome.
Description
[technical field]
The present invention relates to a kind of batteries in battery set balancing energy device.
[background technology]
Lithium battery is in the series connection use, and cell voltage equals single battery voltage sum.But the parameter of each cell is understood some mismatch in manufacturing or the use, if do not carry out the cell equilibrium, one or more batteries can be owed charging or overcharge, and cause shorter battery life.
The balanced main mode of lithium battery has at present: resistance shunt method, switching capacity method and DC-DC converter method.
The resistance shunt method capacity usage ratio is low, and shunt resistance has produced loss; The switching capacity method utilizes switch and electric capacity combination to realize the NE BY ENERGY TRANSFER between adjacent cell, but reliability is not high, and balancing speed is slow;
The balanced secondary winding of centralized transformer in the DC-DC converter technique is difficult to coupling, and the voltage difference that leakage inductance caused of transformer also is difficult to compensation, and there is the not high problem of efficient in the distribution transformer equalization.
Therefore be necessary to improve, study a kind of can the efficient height, fireballing equalization methods.
[summary of the invention]
The present invention has overcome the deficiency of above-mentioned technology, and a kind of batteries in battery set balancing energy device is provided, and this device can be realized the harmless balancing energy between cell more fast, has overcome the unbalanced defective of existing lithium battery.
For realizing above-mentioned purpose, the present invention has adopted following technical proposal:
A kind of batteries in battery set balancing energy device includes
One balancing energy is with capacitor 1;
A plurality of metal-oxide-semiconductor switching circuits 2, each metal-oxide-semiconductor switching circuit 2 are connected corresponding battery and said balancing energy with between the capacitor 1;
A plurality of drive circuits 3, the output of each a plurality of drive circuit 3 connects with corresponding metal-oxide-semiconductor switching circuit 2;
One condenser voltage testing circuit 4, its two inputs are connected with the two ends of balancing energy with capacitor 1 respectively;
One governor circuit 5; This governor circuit 5 is through condenser voltage testing circuit 4 each cell voltage of monitoring, and when monitoring a certain cell voltage when too high, the corresponding metal-oxide-semiconductor switching circuit conducting of control is charged with capacitor 1 to balancing energy; After accomplishing, charging turn-offs this road metal-oxide-semiconductor switching circuit; And open the low metal-oxide-semiconductor switching circuit of cell voltage, balancing energy charges to this cell with capacitor, so repeatedly; Make energy by the high battery of voltage harmless transfer to the low battery of voltage, make balancing energy between battery.
Said metal-oxide-semiconductor switching circuit 2 comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, and the drain electrode of the drain electrode of the first metal-oxide-semiconductor Q1, the 3rd metal-oxide-semiconductor Q3 is connected with the positive pole of battery, the negative pole of battery respectively; The drain electrode of the drain electrode of the second metal-oxide-semiconductor Q2, the 4th metal-oxide-semiconductor Q4 is connected with the negative pole of capacitor 1 with positive pole, the balancing energy of balancing energy with capacitor 1 respectively; The source electrode of the first metal-oxide-semiconductor Q1 is connected with the source electrode of the second metal-oxide-semiconductor Q2, and the grid of the first metal-oxide-semiconductor Q1 is connected the back and is connected with the output of drive circuit 3 with the grid of the second metal-oxide-semiconductor Q2; The source electrode of the 3rd metal-oxide-semiconductor Q3 is connected with the source electrode of the 4th metal-oxide-semiconductor Q4, and the grid of the 3rd metal-oxide-semiconductor Q3 is connected the back and is connected with the output of drive circuit 3 with the grid of the 4th metal-oxide-semiconductor Q4.
Said condenser voltage testing circuit 4 comprises the series connection first detection resistance R 1 and the second testing circuit R2 together; The connected node of the first detection resistance R 1 and the second testing circuit R2 is connected with governor circuit 5; The other end of the first detection resistance R 1 is connected with the positive pole of balancing energy with capacitor 1 through behind the metal-oxide-semiconductor of two series connection; The other end of the second testing circuit R2 is connected with the negative pole of balancing energy with capacitor 1 through behind the metal-oxide-semiconductor of two other series connection, between these four metal-oxide-semiconductor grids and governor circuit 5, is connected with to detect with drive circuit 6.
Said governor circuit 5 adopts microprocessor.
The invention has the beneficial effects as follows: gather the monomer battery voltage in the battery pack; According to the difference of each monomer battery voltage, carry out equilibrium, adopt metal-oxide-semiconductor to reduce the energy loss in the balancing procedure as switch; Jumbo electric capacity is adopted in the transfer of energy, has improved balancing speed greatly.
[description of drawings]
Fig. 1 is a block diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
[embodiment]
The present invention is a kind of batteries in battery set balancing energy device, includes
One balancing energy is with capacitor 1;
The joint number of the battery in a plurality of metal-oxide-semiconductor switching circuits 2, the quantity of metal-oxide-semiconductor switching circuit 2 and battery pack is identical, and battery that a plurality of metal-oxide-semiconductor switching circuits 2 respectively will corresponding connection with it and balancing energy are with capacitor 1 parallel connection;
A plurality of drive circuits 3, its quantity is identical with metal-oxide-semiconductor switching circuit 2, the output of a plurality of drive circuits 3 respectively with a plurality of metal-oxide-semiconductor switching circuit 2 corresponding connections;
One condenser voltage testing circuit 4, its two inputs are connected with the two ends of balancing energy with capacitor 1 respectively;
One controls a plurality of metal-oxide-semiconductor switching circuits 2 governor circuit 5 of conductings respectively respectively through a plurality of drive circuits 3; Said governor circuit 5 adopts microprocessor STM32.
The output of said condenser voltage testing circuit 4 is connected with governor circuit 5.
Said metal-oxide-semiconductor switching circuit 2 comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, and the drain electrode of the drain electrode of the first metal-oxide-semiconductor Q1, the 3rd metal-oxide-semiconductor Q3 is connected with the positive pole of battery, the negative pole of battery respectively; The drain electrode of the drain electrode of the second metal-oxide-semiconductor Q2, the 4th metal-oxide-semiconductor Q4 is connected with the negative pole of capacitor 1 with positive pole, the balancing energy of balancing energy with capacitor 1 respectively; The source electrode of the first metal-oxide-semiconductor Q1 is connected with the source electrode of the second metal-oxide-semiconductor Q2, and the grid of the first metal-oxide-semiconductor Q1 is connected the back and is connected with the output of drive circuit 3 with the grid of the second metal-oxide-semiconductor Q2; The source electrode of the 3rd metal-oxide-semiconductor Q3 is connected with the source electrode of the 4th metal-oxide-semiconductor Q4, and the grid of the 3rd metal-oxide-semiconductor Q3 is connected the back and is connected with the output of drive circuit 3 with the grid of the 4th metal-oxide-semiconductor Q4.The structure of drive circuit 3 here is not described in detail referring to accompanying drawing 2.
Said condenser voltage testing circuit 4 comprises the series connection first detection resistance R 1 and the second testing circuit R2 together; The connected node of the first detection resistance R 1 and the second testing circuit R2 is connected with governor circuit 5; The other end of the first detection resistance R 1 is connected with the positive pole of balancing energy with capacitor 1 through behind the metal-oxide-semiconductor of two series connection; The other end of the second testing circuit R2 is connected with the negative pole of balancing energy with capacitor 1 through behind the metal-oxide-semiconductor of two other series connection, between these four metal-oxide-semiconductor grids and governor circuit 5, is connected with to detect with drive circuit 6.Detect and have identical circuit structure with said drive circuit 3 with drive circuit 6.
Operation principle of the present invention is following:
1, single battery and balancing energy are with conducting between the capacitor and disconnection
When the PWM of microprocessor STM32 port produces pwm signal; Drive corresponding drive circuit works; The output resistance R3 of drive circuit; The R4 two ends produce the voltage difference of several volts respectively, thereby control its corresponding 4 metal-oxide-semiconductor Q1, Q2, Q3, Q4 conducting, the cell that metal-oxide-semiconductor connects to balancing energy with capacitor 1 charge or discharge; When the port of microprocessor STM32 did not produce pwm signal, the drive circuit output voltage was 0, and 4 metal-oxide-semiconductors of its control turn-off, no longer to balancing energy with capacitor 1 charge or discharge.
2, the voltage acquisition of single battery
Microprocessor is through detecting the conducting with 4 metal-oxide-semiconductor Q5 of drive circuit 6 controls, Q6, Q7, Q8; Detect resistance R 1 and the balanced voltage (also being monomer battery voltage) with capacitor of the second testing circuit R2 collecting energy through first then, the ADC port that is sent to microprocessor STM32 carries out the AD conversion.Other cell of series connection also is an as above working method.
3, battery balanced process
Microprocessor is through each monomer battery voltage of AD conversion monitoring; When monitoring a certain monomer battery voltage when too high; This cell is passed through the conducting of control metal-oxide-semiconductor switching circuit to balancing energy electricity consumption condenser charge; Turn-off this road metal-oxide-semiconductor switching circuit after charging is accomplished, and open the low metal-oxide-semiconductor switching circuit of monomer battery voltage, balancing energy charges to this cell with capacitor.Process so repeatedly, make energy by the high battery of voltage harmless transfer to the low battery of voltage, realized the balancing energy between cell.
Through above series of voltage monitoring and battery balanced process; Monitor each monomer battery voltage in real time, low or too high if a certain monomer battery voltage is crossed, this balancing procedure will start; The cell electric charge that voltage is high is transferred to the low cell of voltage, has realized the harmless transfer of energy.
Claims (4)
1. a batteries in battery set balancing energy device is characterized in that including
One balancing energy is with capacitor (1);
A plurality of metal-oxide-semiconductor switching circuits (2), each metal-oxide-semiconductor switching circuit (2) are connected corresponding battery and said balancing energy with between the capacitor (1);
A plurality of drive circuits (3), the output of each a plurality of drive circuit (3) connects with corresponding metal-oxide-semiconductor switching circuit (2);
One condenser voltage testing circuit (4), its two inputs are connected with the two ends of balancing energy with capacitor (1) respectively;
One governor circuit (5); This governor circuit (5) is monitored each cell voltage through condenser voltage testing circuit (4), and when monitoring a certain cell voltage when too high, the corresponding metal-oxide-semiconductor switching circuit conducting of control is charged with capacitor (1) to balancing energy; After accomplishing, charging turn-offs this road metal-oxide-semiconductor switching circuit; And open the low metal-oxide-semiconductor switching circuit of cell voltage, balancing energy charges to this cell with capacitor, so repeatedly; Make energy by the high battery of voltage harmless transfer to the low battery of voltage, make balancing energy between battery.
2. a kind of batteries in battery set balancing energy device according to claim 1; It is characterized in that said metal-oxide-semiconductor switching circuit (2) comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, the drain electrode of the drain electrode of the first metal-oxide-semiconductor Q1, the 3rd metal-oxide-semiconductor Q3 is connected with the positive pole of battery, the negative pole of battery respectively; The drain electrode of the drain electrode of the second metal-oxide-semiconductor Q2, the 4th metal-oxide-semiconductor Q4 is connected with the negative pole of capacitor (1) with positive pole, the balancing energy of balancing energy with capacitor (1) respectively; The source electrode of the first metal-oxide-semiconductor Q1 is connected with the source electrode of the second metal-oxide-semiconductor Q2, and the grid of the first metal-oxide-semiconductor Q1 is connected the back and is connected with the output of drive circuit (3) with the grid of the second metal-oxide-semiconductor Q2; The source electrode of the 3rd metal-oxide-semiconductor Q3 is connected with the source electrode of the 4th metal-oxide-semiconductor Q4, and the grid of the 3rd metal-oxide-semiconductor Q3 is connected the back and is connected with the output of drive circuit (3) with the grid of the 4th metal-oxide-semiconductor Q4.
3. a kind of batteries in battery set balancing energy device according to claim 1; It is characterized in that said condenser voltage testing circuit (4) comprises the series connection first detection resistance R 1 and the second testing circuit R2 together; The connected node of the first detection resistance R 1 and the second testing circuit R2 is connected with governor circuit (5); The other end of the first detection resistance R 1 is connected with the positive pole of balancing energy with capacitor (1) through behind the metal-oxide-semiconductor of two series connection; The other end of the second testing circuit R2 is connected with the negative pole of balancing energy with capacitor (1) through behind the metal-oxide-semiconductor of two other series connection, between these four metal-oxide-semiconductor grids and governor circuit (5), is connected with to detect with drive circuit (6).
4. a kind of batteries in battery set balancing energy device according to claim 1 is characterized in that said governor circuit (5) adopts microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103609075A CN102593882A (en) | 2011-11-15 | 2011-11-15 | Energy balancing device for batteries in battery pack |
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| CN2011103609075A CN102593882A (en) | 2011-11-15 | 2011-11-15 | Energy balancing device for batteries in battery pack |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103010042A (en) * | 2012-11-21 | 2013-04-03 | 中山普润斯电源设备技术有限公司 | Cell management system capable of supporting network operation |
| CN103066642A (en) * | 2012-11-30 | 2013-04-24 | 王奉瑾 | Energy balance control system among single batteries inside battery pack |
| CN104917255A (en) * | 2015-07-06 | 2015-09-16 | 深圳东科半导体有限公司 | Equalizing charge and discharge and protection circuit for battery pack |
| CN104935045A (en) * | 2015-06-24 | 2015-09-23 | 深圳先进储能材料国家工程研究中心有限公司 | Battery pack equalization method for energy storage system adopting nickel-series storage batteries |
| CN105553010A (en) * | 2015-12-26 | 2016-05-04 | 惠州市蓝微新源技术有限公司 | Equalization circuit employing boost energy transfer and control method for equalization circuit |
| CN105656142A (en) * | 2016-03-10 | 2016-06-08 | 北京航空航天大学 | Charge and discharge active equalization circuit of lithium-ion power battery pack |
| WO2017000739A1 (en) * | 2015-06-30 | 2017-01-05 | 华为技术有限公司 | Energy balancing method and apparatus |
| CN107895976A (en) * | 2017-10-11 | 2018-04-10 | 惠州市和京新能源科技有限公司 | A kind of lithium battery equalization charging circuit |
| CN110808624A (en) * | 2019-12-10 | 2020-02-18 | 周天文 | Lithium battery balancing circuit |
| CN110932363A (en) * | 2019-12-26 | 2020-03-27 | 上海派能能源科技股份有限公司 | Balanced drive circuit and electronic equipment |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103010042A (en) * | 2012-11-21 | 2013-04-03 | 中山普润斯电源设备技术有限公司 | Cell management system capable of supporting network operation |
| CN103066642A (en) * | 2012-11-30 | 2013-04-24 | 王奉瑾 | Energy balance control system among single batteries inside battery pack |
| CN104935045B (en) * | 2015-06-24 | 2017-04-19 | 深圳先进储能材料国家工程研究中心有限公司 | Battery pack equalization method for energy storage system adopting nickel-series storage batteries |
| CN104935045A (en) * | 2015-06-24 | 2015-09-23 | 深圳先进储能材料国家工程研究中心有限公司 | Battery pack equalization method for energy storage system adopting nickel-series storage batteries |
| US10361568B2 (en) | 2015-06-30 | 2019-07-23 | Huawei Technologies Co., Ltd. | Energy balancing method and apparatus |
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| CN106329592B (en) * | 2015-06-30 | 2019-05-28 | 华为技术有限公司 | A kind of method and device of balancing energy |
| CN104917255A (en) * | 2015-07-06 | 2015-09-16 | 深圳东科半导体有限公司 | Equalizing charge and discharge and protection circuit for battery pack |
| CN105553010A (en) * | 2015-12-26 | 2016-05-04 | 惠州市蓝微新源技术有限公司 | Equalization circuit employing boost energy transfer and control method for equalization circuit |
| CN105656142A (en) * | 2016-03-10 | 2016-06-08 | 北京航空航天大学 | Charge and discharge active equalization circuit of lithium-ion power battery pack |
| CN105656142B (en) * | 2016-03-10 | 2018-02-23 | 北京航空航天大学 | A kind of charging/discharging active equalization circuit for lithium ion power battery pack |
| CN107895976A (en) * | 2017-10-11 | 2018-04-10 | 惠州市和京新能源科技有限公司 | A kind of lithium battery equalization charging circuit |
| CN110808624A (en) * | 2019-12-10 | 2020-02-18 | 周天文 | Lithium battery balancing circuit |
| CN110808624B (en) * | 2019-12-10 | 2023-10-10 | 周天文 | Lithium battery balance circuit |
| CN110932363A (en) * | 2019-12-26 | 2020-03-27 | 上海派能能源科技股份有限公司 | Balanced drive circuit and electronic equipment |
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Application publication date: 20120718 |