CN201290020Y - Voltage equalizing charge circuit for lithium battery set - Google Patents
Voltage equalizing charge circuit for lithium battery set Download PDFInfo
- Publication number
- CN201290020Y CN201290020Y CNU2008202162299U CN200820216229U CN201290020Y CN 201290020 Y CN201290020 Y CN 201290020Y CN U2008202162299 U CNU2008202162299 U CN U2008202162299U CN 200820216229 U CN200820216229 U CN 200820216229U CN 201290020 Y CN201290020 Y CN 201290020Y
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- Prior art keywords
- lithium battery
- current
- voltage
- charging
- voltage monitoring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 93
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 238000012544 monitoring process Methods 0.000 claims abstract description 30
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 4
- 150000002641 lithium Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 102220569345 Deoxynucleotidyltransferase terminal-interacting protein 1_Q20A_mutation Human genes 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- YRRKLBAKDXSTNC-WEVVVXLNSA-N Aldoxycarb Chemical compound CNC(=O)O\N=C\C(C)(C)S(C)(=O)=O YRRKLBAKDXSTNC-WEVVVXLNSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
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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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
A voltage-equalizing charging circuit of a lithium battery pack comprises multiple lithium batteries in series, wherein each lithium battery is in parallel connection with a voltage monitoring current shunting network and a single battery voltage monitoring module; and output signals of all single battery voltage monitoring modules are connected to a charging/discharging control circuit. During the charging process of the lithium battery pack, when a single battery which is connected in parallel with the voltage monitoring current shunting network is firstly detected to be charged to be close to full power, the current shunting is performed by the voltage monitoring shunting network, thereby decreasing the charge current of the lithium battery, preventing the overcharge thereof, and remaining the current continuity of a whole serial charge loop and the relative stabilization of the charging current. By adopting the current shunting method to realize the equalizing charge of all batteries, the safety of all batteries when in use is effectively ensured, and the service life thereof is prolonged.
Description
Technical field
The utility model relates to a kind of lithium battery group charging circuit, relates in particular to a kind of lithium battery group electric voltage equalization charging circuit.
Background technology
Based on reasons such as the production technology of lithium battery, battery material, charging methods, make the terminal voltage between each battery of lithium battery group difference occur, respectively save lithium battery priority different time when causing the charging of lithium battery group by full charge, the phenomenon of overcharging appears in the lithium battery elder generation full charge that must cause having, the undercharge problem appears again in full charge behind the lithium battery that has, and this will influence the useful life of lithium battery group.
Certain single battery elder generation full charge in the lithium battery group, will be in the danger of overvoltage charging, rechargeable energy is with surplus, dump energy changes heat energy again into, the inside battery temperature rise improves, and quickens battery electrolyte and decomposes and generation gas vicious circle, in press liter, the lithium battery assembly housing has and produces the danger break.To the lithium battery of undercharge, over-discharge can danger is arranged, cause electrolyte decomposition, battery performance descends, and shortens the life-span.As seen will directly protect the safe in utilization of lithium battery group to lithium battery group electric voltage equalization charging and prolong lithium battery group useful life.
At present; single-unit charging and discharging lithium battery administrative protection circuit is ripe; be illustrated in figure 3 as the block diagram of common single-unit charging and discharging lithium battery administrative protection modular circuit, this protective circuit comprises the lithium battery monitoring and protecting circuit of being made up of the detection comparator 10 that overcharges, overdischarge detection comparator 11, logic determines control circuit 12, charging control switch 16, discharge control switch 15 etc.After detection comparator 10,11 detects the current potential of lithium battery 9, the reference voltage that the current potential 9 of detected lithium battery and detection comparator 10,11 is built-in relatively, then comparative result is exported to logic determines control circuit 12, logic determines control circuit 12 goes to control the break-make in the charge and discharge loop of charge switch 16 and discharge control switch 15 according to the numerical value of prior setting and control program.
During normal charge and discharge loop works: output pin C0, the D0 of single-unit charging and discharging lithium battery administrative protection module all export high level, the equal conducting of charging control switch 16 and discharge control switch 15, and the single-unit lithium battery is by normal charge and discharge work.
If when having detected overcharged voltage or overdischarge pressure; then the output pin C0 of single-unit charging and discharging lithium battery administrative protection module or D0 output low level; charging control switch pipe 16 or discharge control switch pipe 15 are ended; the single-unit lithium battery is stopped charge and discharge; thereby realize charging voltage, discharge voltage, the discharging current of single-unit lithium battery are monitored and controlled, reached the useful life that guarantees the safety in the use of single-unit lithium battery and prolong lithium battery.
At present, for the multisection lithium battery group, pair lithium battery group guard circuit when overvoltage charging and over-discharge can is only arranged, and do not have the electric voltage equalization charging circuit of each battery in the lithium battery group.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of prior art, and a kind of lithium battery group electric voltage equalization charging circuit is provided, guarantee effectively each single-unit lithium battery in using safety and increase the service life.
Above-mentioned purpose of the present utility model is realized by following technical scheme: lithium battery group electric voltage equalization charging circuit, include the lithium battery 2 of series connection multisection lithium battery, described multisection lithium battery is parallel with a voltage monitoring current-dividing network and a single battery voltage monitoring modular separately, and the output of all single battery voltage monitoring modulars 4 is connected to charge-discharge control circuit 5.In lithium battery group charging process, when described voltage monitoring current-dividing network detects the single-unit lithium battery in parallel with it earlier when being full of electricity, shunt by it, reduce the charging current of this joint lithium battery, stop it to overcharge, keep again simultaneously in the whole serial connection charge loop electric current continuously and charging current relatively stable, adopt the method for shunting to realize each batteries equalizing charge.After described all single battery voltage monitoring modulars 4 monitor whole lithium battery full charges, disconnect the charging and discharging circuit of lithium battery group by charge-discharge control circuit 5, thereby finish whole charging process.
Advantage of the present utility model and effect provide and a kind of each single battery in the lithium battery group are realized equalizing charge, guarantee effectively each single-unit lithium battery in using safety and increase the service life.
The utility model circuit adopts the voltage monitoring current-dividing network that each batteries is monitored, and when the approaching abundance of this batteries charging, delays charging rate by the method for shunting, and control overcharges phenomenon, when whole single batteries is full of electricity, i.e. and charging end.Thereby the realization equalizing charge has prolonged useful life of battery.
Description of drawings
Fig. 1 is a line principle block diagram of the present utility model;
Fig. 2 is a voltage monitoring current-dividing network line map of the present utility model;
Fig. 3 is a single-unit charging and discharging lithium battery administrative protection module monitors schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.
Fig. 1 is a line principle block diagram of the present utility model, include lithium battery group 2, they by multisection lithium battery E1, E2 ..., En is composed in series, each saves lithium battery and is parallel with a voltage monitoring current-dividing network and a single battery voltage monitoring modular separately, and the output of all single battery voltage monitoring modulars 4 is connected to charge-discharge control circuit 5.In lithium battery group 2 charging processes, when described voltage monitoring current-dividing network 3 detects the single-unit lithium battery in parallel with it earlier when being full of electricity, shunt by it, reduce the charging current of this joint lithium battery, stop it to overcharge, keep again simultaneously in the whole serial connection charge loop electric current continuously and charging current relatively stable, adopt the method for shunting to realize each batteries equalizing charge.Described all single battery voltage monitoring module monitors disconnect the charging and discharging circuit of lithium battery group by charge-discharge control circuit 5, thereby finish whole charging process behind whole lithium battery full charges.
Each voltage monitoring current-dividing network is formed by equalizing resistance, switch triode, adjustment resistance, three-terminal voltage-stabilizing pipe, current-limiting resistance and shunting triode.
R0, ROA ..., R0n is equalizing resistance;
Q1, Q1A ..., Q1n is switch triode;
R1 and R2, R1A and R2A ..., R1n and R2n be for adjusting resistance;
Q20, Q20A ..., Q20n is the three-terminal voltage-stabilizing pipe;
R3, R3A ..., R3n is current-limiting resistance;
Q3, Q3A ..., Q3n for the shunting triode;
With regard to the voltage monitoring current-dividing network of lithium battery E1 parallel connection, the emitter and collector of shunting triode Q3 links to each other with negative pole with the positive pole of connection lithium battery E1 respectively, its base stage connects the output end vo ut of three-terminal voltage-stabilizing pipe Q20, the earth terminal of three-terminal voltage-stabilizing pipe Q20 connects the negative terminal of lithium battery E1, the control end of three-terminal voltage-stabilizing pipe Q20 connects the intermediate connection point that two serial connections are adjusted resistance R 1 and R2, the output end vo ut of three-terminal voltage-stabilizing pipe Q20 links to each other with the positive pole of lithium battery E1 by current-limiting resistance R3, two serial connections are adjusted resistance R 1 and are linked to each other with the positive pole of lithium battery E1 with R2 one end, the other end links to each other with the collector electrode of switch triode Q1, the emitter of switch triode Q1 links to each other with the negative terminal of lithium battery E1, the base stage of switch triode Q1 links to each other with the branch pressure side of equalizing resistance R0, all equalizing resistance R0, ROA, ..., the R0n series connection, its upper end links to each other with the positive pole of lithium battery group 2, the lower end links to each other with the base stage of last switch triode Q1n, and each tie point links to each other with the base stage of each switch triode for dividing pressure side in the middle of it.The internal structure of other voltage monitoring current-dividing networks is identical with said structure.
Voltage monitoring current-dividing network operation principle: connecting 1 pair of lithium battery group 2 of lithium battery charger when charging, Q1, Q1A ..., Q1n is the equal forward bias of switch triode, and is in dark saturation conduction state, saturation voltage drop UCES＜0.15V.
R1 and R2, R1A and R2A ..., R1n and R2n be provided with the adjustment resistance that equalizing voltage begins to shunt;
Q20, Q20A ... Q20n three-terminal voltage-stabilizing pipe is that the magnitude of voltage that equalizing voltage begins to shunt is set;
Vout＝(1+R1/R2)Vref；Vref＝2.5V；
Regulate R1 or R2 and make Vout=(1+R1/R2) Vref=U shunting setting voltage value
=U detection magnitude of voltage-the 0.01V that overcharges;
I fills=IE1+IRO=I charger setting current value;
The I charger is set current value: be provided with according to the battery specific requirement;
When charging normal work:
IRO * RO+IRO * ROA+ ... + IRO * R0n=U cell voltage-0.7V to be charged;
So: URO=UROA=...=UR0n=U cell voltage-0.7V to be charged.
The electric current I that produces by E+ during charging fill through E1, E2 ..., En and R0, ROA ..., R0n holds to E_;
As seen: distribute to each battery voltage value to be charged during charging and equate that the equilibrium of E+ value is assigned on lithium battery group 2 each lithium batteries.
If arriving set point U earlier, battery E1 voltage to be charged shunts setting voltage value during charging, then Q20 conducting, and unnecessary electric charge is through E+, R3, Q20, E2, E3 ... En gets back to E-, keep in the serial connection charge loop electric current continuously and charging current relatively stable.If need add the large shunt value can be again to triode Q3, Q3A ..., the Q3n circuit suitably adjusts, and divides a flow valuve requirement to satisfy design.
Each lithium battery all has a high accuracy shunting voltage detecting network in the lithium battery group, and shunting in time when detecting certain lithium battery voltage earlier near U cell voltage to be charged prevents the charging of lithium battery overvoltage;
Each lithium battery high accuracy single battery voltage monitoring modular all in parallel in the lithium battery group.If charge and discharge control circuit 5 automatic disconnection loops stop the charge and discharge of lithium battery group when finding to have overvoltage charging, overvoltage discharge or load short circuits.
Claims (2)
1, a kind of lithium battery group electric voltage equalization charging circuit, include the lithium battery group (2) of series connection multisection lithium battery, each lithium battery that it is characterized in that described lithium battery group (2) is parallel with a voltage monitoring current-dividing network and a single battery voltage monitoring modular separately, and the output of all single battery voltage monitoring modulars (4) is connected to charge-discharge control circuit (5);
When described voltage monitoring current-dividing network (3) detects the lithium battery in parallel with it and reaches the magnitude of voltage of setting when being full of electricity earlier, shunt by it, reduce the charging current of this lithium battery, keep simultaneously in the serial connection charge loop electric current continuously and charging current relatively stable, after described all single battery voltage monitoring modulars (4) monitored whole lithium battery full charges, described charge-discharge control circuit (5) disconnected charging and discharging circuit.
2, lithium battery group electric voltage equalization charging circuit according to claim 1 is characterized in that:
The voltage monitoring current-dividing network that is parallel to first segment lithium battery (E1) is made up of equalizing resistance (R0), switch triode (Q1), adjustment resistance (R1, R2), three-terminal voltage-stabilizing pipe (Q20), current-limiting resistance (R3) and shunting triode (Q3);
The emitter and collector of shunting triode (Q3) links to each other with negative pole with the positive pole of connection lithium battery (E1) respectively, its base stage connects the output (Vout) of three-terminal voltage-stabilizing pipe (Q20), the earth terminal of three-terminal voltage-stabilizing pipe (Q20) connects the negative terminal of lithium battery, the control end of three-terminal voltage-stabilizing pipe (Q20) connects two serial connections and adjusts resistance (R1, R2) intermediate connection point, the output (Vout) of three-terminal voltage-stabilizing pipe (Q20) links to each other with the positive pole of lithium battery by current-limiting resistance (R3), two serial connections are adjusted resistance (R1, R2) end links to each other with the positive pole of lithium battery, the other end links to each other with the collector electrode of switch triode (Q1), the emitter of switch triode (Q1) links to each other with the negative terminal of lithium battery, the base stage of switch triode (Q1) links to each other with the branch pressure side of equalizing resistance (R0), all equalizing resistance (RO, ROA, ROB, ..., ROn) series connection, its upper end links to each other with the positive pole of lithium battery group (2), the lower end links to each other with the base stage of last switch triode (Q1n), and each tie point is for dividing pressure side in the middle of it;
All voltage monitoring current-dividing networks have identical circuit structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202162299U CN201290020Y (en) | 2008-11-17 | 2008-11-17 | Voltage equalizing charge circuit for lithium battery set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202162299U CN201290020Y (en) | 2008-11-17 | 2008-11-17 | Voltage equalizing charge circuit for lithium battery set |
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| Publication Number | Publication Date |
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| CN201290020Y true CN201290020Y (en) | 2009-08-12 |
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| CNU2008202162299U Expired - Lifetime CN201290020Y (en) | 2008-11-17 | 2008-11-17 | Voltage equalizing charge circuit for lithium battery set |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826745A (en) * | 2010-05-18 | 2010-09-08 | 郁百超 | Lithium ion power battery lossless charger |
| CN101872991A (en) * | 2010-06-28 | 2010-10-27 | 惠州市亿能电子有限公司 | Balance control method of power battery pack |
| CN102355026A (en) * | 2011-10-12 | 2012-02-15 | 深圳市超思维电子有限公司 | Backup energy-storage power supply managing system of coal mine electronic device |
| CN102916474A (en) * | 2011-08-05 | 2013-02-06 | 苍南电力有限责任公司 | Lithium battery DC (Direct Current) power supply device applied to substation |
| CN103607001A (en) * | 2013-11-04 | 2014-02-26 | 江苏嘉钰新能源技术有限公司 | Battery shunt equalization method |
| CN105071497A (en) * | 2015-08-28 | 2015-11-18 | 中国电子科技集团公司第十八研究所 | Lithium ion storage battery intelligent equalization module |
| CN110544798A (en) * | 2019-09-12 | 2019-12-06 | 浙江齐享科技有限公司 | Battery pack parallel management module, energy storage power station and combined energy storage power station |
| CN116461387A (en) * | 2023-04-04 | 2023-07-21 | 常州汉姆智能科技有限公司 | Unmanned aerial vehicle battery serial connection charge balance circuit |
-
2008
- 2008-11-17 CN CNU2008202162299U patent/CN201290020Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826745A (en) * | 2010-05-18 | 2010-09-08 | 郁百超 | Lithium ion power battery lossless charger |
| WO2011144007A1 (en) * | 2010-05-18 | 2011-11-24 | Yu Baichao | Lossless charger for lithium-ion power battery |
| CN101826745B (en) * | 2010-05-18 | 2014-06-04 | 郁百超 | Lithium ion power battery lossless charger |
| CN101872991A (en) * | 2010-06-28 | 2010-10-27 | 惠州市亿能电子有限公司 | Balance control method of power battery pack |
| CN102916474A (en) * | 2011-08-05 | 2013-02-06 | 苍南电力有限责任公司 | Lithium battery DC (Direct Current) power supply device applied to substation |
| CN102355026A (en) * | 2011-10-12 | 2012-02-15 | 深圳市超思维电子有限公司 | Backup energy-storage power supply managing system of coal mine electronic device |
| CN103607001A (en) * | 2013-11-04 | 2014-02-26 | 江苏嘉钰新能源技术有限公司 | Battery shunt equalization method |
| CN105071497A (en) * | 2015-08-28 | 2015-11-18 | 中国电子科技集团公司第十八研究所 | Lithium ion storage battery intelligent equalization module |
| CN110544798A (en) * | 2019-09-12 | 2019-12-06 | 浙江齐享科技有限公司 | Battery pack parallel management module, energy storage power station and combined energy storage power station |
| CN116461387A (en) * | 2023-04-04 | 2023-07-21 | 常州汉姆智能科技有限公司 | Unmanned aerial vehicle battery serial connection charge balance circuit |
| CN116461387B (en) * | 2023-04-04 | 2023-10-24 | 常州汉姆智能科技有限公司 | Unmanned aerial vehicle battery serial connection charge balance circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090812 |
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| CX01 | Expiry of patent term |