CN101162846A - Series battery charge up circuit with charge compensate function - Google Patents
Series battery charge up circuit with charge compensate function Download PDFInfo
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- CN101162846A CN101162846A CNA200710163230XA CN200710163230A CN101162846A CN 101162846 A CN101162846 A CN 101162846A CN A200710163230X A CNA200710163230X A CN A200710163230XA CN 200710163230 A CN200710163230 A CN 200710163230A CN 101162846 A CN101162846 A CN 101162846A
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- 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
Abstract
The present invention provides a charging control circuit which can compensate the charging for battery with lower voltage in series battery set during charging and enables the terminal voltage of independent battery in series battery set to tend to uniform. The charging control circuit can detect the terminal voltage of the independent battery in series battery set in real time during charging and compensate charging for the battery with lower terminal voltages through a compensation charging circuit, thereby making up the differences of the initial state and the charging/discharging characteristics for independent battery in the battery set, unleashing the loading capability of the independent battery while making sure the independent battery has no over-charging and improving charging and discharging efficacy of the power battery.
Description
Affiliated technical field
The present invention relates to a kind of circuit that series battery charge is controlled, particularly control, belong to the electrical equipment control class for the charging of great-capacity power battery.
Background technology
Electrokinetic cell is the power supply with electric loading such as electric tool, electric automobile, electric bicycle, emergency lighting.Electrokinetic cell is the battery pack that is in series by a plurality of cells, and the cell quantity of the high more required series connection of voltage is many more.Owing to the control precision reason of production process, the various electrochemical parameters of each cell there are differences, and make capacity, charge-discharge characteristic, the initial condition of cell be difficult to accomplish in full accord.Adopt many methods of knowing that a plurality of cells are connected into battery pack, after making electrokinetic cell, the characteristic of each battery and the difference of initial condition just are retained in the battery pack, in charging and discharge process, the electric current that each cell passed through in the battery pack is identical, because the existence of the characteristic of each battery and the difference of initial condition, the charged ability of each battery can not be not fully exerted, the charging and the discharging efficiency of battery pack or electrokinetic cell have been reduced, more serious situation is, in use with the continuous increase of charging-discharge time, the state of forming each battery of battery pack, the difference of charge and charged ability can increase gradually, the part battery " overcharges " when causing charging, and part battery during discharge " is crossed and put "." overcharge " and " cross put " all can cause the irreversible damage of battery, the battery of damage is heating in a large number in follow-up charging and discharge process, has a strong impact on the whole discharging efficiency and the useful life of electrokinetic cell, returns charge and discharge process and brings potential safety hazard.
Chinese patent ZL00137155.X discloses and a kind of series battery charge and discharge has been carried out the control circuit scheme; after this scheme will be formed each battery series connection of battery pack; detect the voltage of battery in real time in charging and discharge process; the electric current of temperature and battery pack; the way of taking to reduce charge power or discharge power is protected each battery in the battery pack; can avoid battery " to overcharge " effectively; " cross and put "; " overheated "; but can not compensate the difference of initial condition of each battery of forming series battery and the difference of charge; the charged ability of each battery can not be not fully exerted, and has reduced the charging and the discharging efficiency of battery pack or electrokinetic cell.
Known another kind is each battery two ends controllable discharge circuit in parallel of the battery pack after series connection with the series-connected cell Managed Solution of equalizing circuit.In the discharge process, when the difference of the voltage of each battery in the series battery acquires a certain degree, the discharge circuit that battery connected that the equalizing circuit starting resistor is higher, the higher battery of voltage is emitted more electric weight by the discharge circuit that is attached thereto, and this cell voltage reduces quickly.In the charging process; when the difference of the voltage of each battery in the series battery acquires a certain degree; the discharge circuit that battery connected that the equalizing circuit starting resistor is higher; the higher battery of voltage disperses a part of charging current by the discharge circuit that is attached thereto; this battery charging rate is reduced; rate of voltage rise slows down, and each cell voltage reaches unanimity in the battery pack thereby make, and reaches the purpose of each battery terminal voltage in protection battery and the balanced series battery.When equalizing circuit was worked in this scheme, the discharge circuit that is connected with battery discharged electric energy and generates heat.For jumbo power battery pack, charging current is big, effectively works for making equalizing circuit, must strengthen its dissipation power, causes a large amount of heatings, causes energy waste, and charge efficiency is low.For satisfying the heat radiation needs, control appliance is huge.
Summary of the invention
For bringing into play the charged ability of each battery in the battery pack to greatest extent, avoid the energy loss of equalizing circuit in the aforementioned equalizing circuit charging scheme, improve energy conversion efficiency in charging and the discharge process, the invention provides and a kind ofly in charging process, the lower battery of terminal voltage in the series battery is compensated charging, make the charging control circuit that each cell voltage reaches unanimity in the series battery.This charging control circuit detects the terminal voltage of each battery in the series battery in real time in charging process, by the compensating charge circuit the lower battery of terminal voltage is carried out charge compensate, remedy the difference of initial condition, charge and the charged ability of each battery in the battery pack, guaranteeing when each battery does not overcharge the charged ability of each battery to be not fully exerted, thereby improving the charging and the discharging efficiency of electrokinetic cell.
The technical scheme that technical solution problem of the present invention is adopted is: in basic 2 pairs of series batteries of charging circuit, 8 chargings, the terminal voltage of each battery in 9 pairs of series batteries 8 of microcontroller 11 control voltage detecting circuits is carried out cycle detection, A/D change-over circuit 10 converts the terminal voltage of each battery to digital signal and send microcontroller 11, microcontroller 11 compares the terminal voltage of each battery and the maximum of each battery terminal voltage, when the terminal voltage of certain battery is lower than maximum voltage and difference and surpasses setting, microcontroller 11 is to isolated from power change-over circuit 3, compensating charge circuit 4 and change over switch 5 transmit control signal, isolated from power change-over circuit 3 will be converted to the low-voltage dc power supply of suspension from the charge power supply of electric power source distribution device 1, compensating charge control circuit 4 compensates charging current control, carries out charge compensate through the lower battery of 5 pairs of terminal voltages of change over switch.The charging current of battery of carrying out charge compensate is greater than the charging current of other battery, and the terminal voltage rate of climb of this battery is higher than other battery.When the terminal voltage of this battery reached the terminal voltage maximum of battery, microcontroller 11 transmitted control signal to change over switch 5, closed the compensating charge path of this battery, stopped the compensating charge to this battery.The terminal voltage of microcontroller 11 each batteries of cycle detection is calculated the terminal voltage of each battery and the difference of current maximum voltage, when the difference of the terminal voltage of certain battery and maximum voltage surpasses setting, starts compensating charge once more.
In whole charging process, compensating charge control circuit 4 always compensates charging to the lower battery of terminal voltage in the series battery, thereby the terminal voltage of each battery in the series battery is reached unanimity in charging process, when charging finishes, make the difference minimum of the terminal voltage of each battery in the series battery.Guaranteeing when each battery does not overcharge the charged ability of each battery to be not fully exerted, thereby improving the charging and the discharging efficiency of electrokinetic cell.
Compensating charge circuit 4 is subjected to the control of microcontroller 11, can be according to the amplitude of the difference of battery terminal voltage and maximum voltage, and the compensating charge electric current of control compensation charging circuit 4 is regulated compensating charge speed, has improved the efficient of charge compensate.
After the terminal voltage of certain battery in the series battery reached charging deboost 4.25V, microcontroller 11 cut out basic charging circuit 2 by protective circuit 6.
After basic charging circuit 2 cuts out, when the extreme difference of the terminal voltage of each battery (Vmax-Vmin) surpasses setting in the series battery 8, compensating charge circuit 4 can be under the situation that basic charging circuit 2 cuts out, continuation compensates charging to the low battery of terminal voltage, further reduce the terminal voltage difference of each battery in the series battery 8, the state of battery is reached unanimity, and the charged ability of each battery is not fully exerted.
The invention has the beneficial effects as follows: the invention solves the charged capability problems that traditional charging circuit can not be given full play to each battery in the series battery, when each battery does not overcharge in guaranteeing series battery, the charged ability of each battery is not fully exerted, thereby improves the charging and the discharging efficiency of electrokinetic cell.
The present invention adopts the method that in charging process each battery in the series battery is compensated, solved electric energy loss, heating, the ability of equalization low problem of current known charge-discharge control circuit, improved the energy conversion efficiency in the charging process equalizing circuit in the series battery charge process with balanced controlled function.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is 10 joint lithium charging circuit of series-connection battery pack connection layouts with charge compensate function.
Fig. 2 is the Single-chip Controlling program flow diagram of microcontroller 11.
Among the figure, 1, electric power source distribution device, 2, basic charging control circuit; 3, isolated from power change-over circuit, 4, the compensating charge control circuit, 5, change over switch; 6, protective circuit, 7, the electric quantity metering circuit, 8, series battery; 9, voltage detecting circuit, 10, the A/D change-over circuit, 11, microcontroller; 12, charge/discharge switch; 13, control power circuit, 14, charge connector, 15, channel selection circuit.
Embodiment
Present embodiment is to have the charge compensate function charging circuit of series-connection battery pack, and battery pack claims the 3.7V50AH lithium battery to be in series by 10 feast-brand marks, and the basic parameter of charging control is as follows:
External charge power supply AC220V
Basic charging current 10A, basic charging termination condition is any battery terminal voltage 4.25V
Compensating charge electric current 2A, the compensating charge entry condition is: the maximum-0.1V of battery terminal voltage≤each battery terminal voltage
The compensating charge termination condition is: the maximum of battery terminal voltage 〉=each battery terminal voltage.
Implementation method is as follows, referring to Fig. 1 and Fig. 2:
(1) electric power source distribution device 1 adopts the copper binding post of capacity 5A, will import power supply and supply with basic charging control circuit 2 and isolated from power change-over circuit 3 respectively.
(2) basic charging control circuit 2 constitutes constant-current control circuit by AC/DC transducer and the high-power FET MTB30P06 of AC220V/DC48V15A, provides 10A basic charging current to series battery 8.
(3) isolated from power change-over circuit 3 adopts the power isolation transformer of AC200V/5V20W, the DC5V DC power supply that 5A electric bridge full-wave rectifying circuit is converted to the charge power supply of AC220V suspension.
(4) compensating charge control circuit 4 adopts field effect transistor NTMS10P02 as the constant current control element, and output current is constant to be 2A.
(5) change over switch 5 is made up of the hermetically sealed electromagnetic relay of 10 coil voltage 5V contact capacity 28V3A, carries out logic switch control by microcontroller 11.
(6) channel selection circuit 15 adopts HC4066 analog switch and 4n35 to isolate the light lotus root, is subjected to microcontroller 11 controls, the terminal voltage sense channel of the battery that gating will detect.
(7) after voltage detecting circuit 9 uses linear light lotus root HCNR200 that the terminal voltage of each battery is isolated sampling, do the signal processing and amplifying with operational amplifier OP07.
(8) A/D change-over circuit 10 adopts 12 analog/digital converter MAX1238 of 12 passages, and each cell voltage is converted to digital signal, send microcontroller 11.
(9) microcontroller 11 adopts AT89S52PI single-chip microcomputer integrated circuit, referring to Fig. 2, and establishment Single-chip Controlling program.
(10) charge/discharge switch 12 adopts hand switch, links to each other with control power circuit 13.
(11) control power circuit 13 adopts DC/DC convertor ic MAX5035, converts battery voltage to 5VDC, for microcontroller 11 and other control circuit provide working power.
(12) protective circuit 6 adopts 2 high-power FET MTB30P06V, does charge protection and discharge prevention respectively, and protective circuit 6 is subjected to microcontroller 11 controls.
(13) electric quantity metering circuit 7 adopts DS2751 battery detection integrated circuit, carries out current detecting and charge/discharge electric quantity metering, and DS2751 battery detection integrated circuit is connected with microcontroller 11 by 1 line system communication interface.
Claims (3)
1. charging circuit of series-connection battery pack with charge compensate function, comprise basic charging control circuit (2), isolated from power change-over circuit (3), compensating charge control circuit (4), change over switch (5), series battery (8), voltage detecting circuit (9), A/D change-over circuit (10), microcontroller (11), it is characterized in that: have at least an isolated from power change-over circuit (3) that external power source is converted to the low-voltage DC that at least one road suspends, link to each other with each battery in the series battery (8) through compensating charge control circuit (4) and change over switch (5), compensating charge control circuit (4) and change over switch (5) are controlled by microcontroller (11).
2. a kind of charging circuit of series-connection battery pack according to claim 1 with charge compensate function, it is characterized in that: described microcontroller (11) is by A/D change-over circuit (10) and voltage detecting circuit (9), detect the terminal voltage of each battery in the series battery (8) in real time, and control compensation charging control circuit (4) and change over switch (5), the battery that terminal voltage in the low-voltage DC of the suspension of isolated from power change-over circuit (3) output and the series battery is lower is connected, and the battery lower to terminal voltage in the series battery compensates charging.
3. a kind of charging circuit of series-connection battery pack according to claim 1 with charge compensate function, it is characterized in that: isolate mutually between the low-voltage DC of the suspension of described isolated from power change-over circuit (3) output and the basic charging circuit, not altogether, can when charging control circuit (2) charges to battery pack (8) substantially, compensate charging any one battery in the battery pack (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710163230XA CN101162846A (en) | 2007-10-22 | 2007-10-22 | Series battery charge up circuit with charge compensate function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710163230XA CN101162846A (en) | 2007-10-22 | 2007-10-22 | Series battery charge up circuit with charge compensate function |
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| CN101162846A true CN101162846A (en) | 2008-04-16 |
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| CNA200710163230XA Pending CN101162846A (en) | 2007-10-22 | 2007-10-22 | Series battery charge up circuit with charge compensate function |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924388A (en) * | 2010-07-12 | 2010-12-22 | 无锡晶磊电子有限公司 | Full automatic balance type battery pack charger device |
| WO2011011931A1 (en) * | 2009-07-31 | 2011-02-03 | Tian Yu | Secondary battery pack and charger for secondary battery pack including series secondary batteries |
| CN102013722A (en) * | 2010-07-14 | 2011-04-13 | 陈赖容 | Charging optimization manager of lead-acid storage battery |
| CN102237701A (en) * | 2010-04-30 | 2011-11-09 | 欣旺达电子股份有限公司 | Method and system for adjusting difference between single batteries of battery pack |
| CN102593916A (en) * | 2012-03-07 | 2012-07-18 | 德龙伟创科技(深圳)有限公司 | Active charge equalizing system and method of lithium battery pack |
| CN103312011A (en) * | 2012-03-06 | 2013-09-18 | 苏州能斯特新能源有限公司 | Power device for energy storage of lithium battery |
| CN101609994B (en) * | 2008-06-17 | 2016-01-20 | 比亚迪股份有限公司 | Balanced charging device and balanced charging method |
| CN106130123A (en) * | 2016-07-28 | 2016-11-16 | 北京精密机电控制设备研究所 | A kind of servo power power supply |
| CN109638926A (en) * | 2019-01-21 | 2019-04-16 | 珠海格力电器股份有限公司 | For the compensation circuit of energy-storage system, energy-storage system and control method |
| CN112349982A (en) * | 2019-08-07 | 2021-02-09 | 北京小米移动软件有限公司 | Battery, charging method and charging device |
| CN112768793A (en) * | 2020-07-22 | 2021-05-07 | 青岛瑰宝电子科技有限公司 | Active equalization compensation method, device and system for battery pack and electronic equipment |
-
2007
- 2007-10-22 CN CNA200710163230XA patent/CN101162846A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609994B (en) * | 2008-06-17 | 2016-01-20 | 比亚迪股份有限公司 | Balanced charging device and balanced charging method |
| WO2011011931A1 (en) * | 2009-07-31 | 2011-02-03 | Tian Yu | Secondary battery pack and charger for secondary battery pack including series secondary batteries |
| CN102237701B (en) * | 2010-04-30 | 2015-09-02 | 欣旺达电子股份有限公司 | The method and system of adjustment batteries monomer battery difference |
| CN102237701A (en) * | 2010-04-30 | 2011-11-09 | 欣旺达电子股份有限公司 | Method and system for adjusting difference between single batteries of battery pack |
| CN101924388A (en) * | 2010-07-12 | 2010-12-22 | 无锡晶磊电子有限公司 | Full automatic balance type battery pack charger device |
| CN102013722A (en) * | 2010-07-14 | 2011-04-13 | 陈赖容 | Charging optimization manager of lead-acid storage battery |
| CN103312011A (en) * | 2012-03-06 | 2013-09-18 | 苏州能斯特新能源有限公司 | Power device for energy storage of lithium battery |
| CN102593916A (en) * | 2012-03-07 | 2012-07-18 | 德龙伟创科技(深圳)有限公司 | Active charge equalizing system and method of lithium battery pack |
| CN102593916B (en) * | 2012-03-07 | 2015-12-23 | 德龙伟创科技(深圳)有限公司 | A kind of lithium battery group initiatively equalizing charge system and method |
| CN106130123A (en) * | 2016-07-28 | 2016-11-16 | 北京精密机电控制设备研究所 | A kind of servo power power supply |
| CN106130123B (en) * | 2016-07-28 | 2018-12-21 | 北京精密机电控制设备研究所 | A kind of servo power power supply |
| CN109638926A (en) * | 2019-01-21 | 2019-04-16 | 珠海格力电器股份有限公司 | For the compensation circuit of energy-storage system, energy-storage system and control method |
| CN112349982A (en) * | 2019-08-07 | 2021-02-09 | 北京小米移动软件有限公司 | Battery, charging method and charging device |
| CN112768793A (en) * | 2020-07-22 | 2021-05-07 | 青岛瑰宝电子科技有限公司 | Active equalization compensation method, device and system for battery pack and electronic equipment |
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Open date: 20080416 |