CN2651946Y - Special balancing protective circuit of lithium ion battery - Google Patents
Special balancing protective circuit of lithium ion battery Download PDFInfo
- Publication number
- CN2651946Y CN2651946Y CN 200320111956 CN200320111956U CN2651946Y CN 2651946 Y CN2651946 Y CN 2651946Y CN 200320111956 CN200320111956 CN 200320111956 CN 200320111956 U CN200320111956 U CN 200320111956U CN 2651946 Y CN2651946 Y CN 2651946Y
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- China
- Prior art keywords
- circuit
- battery
- lithium ion
- ion battery
- resistor
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- Expired - Fee Related
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- Y02E60/12—
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- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model belongs to a special balance protection circuit for lithium ion batteries, which comprises an electronic circuit. The electronic circuit wherein is composed of an integrated circuit, three field effect tubes, a resistor and two and more than two batteries in series. A PACK+ and a PACK- of a special balance protection circuit for lithium ion battery pack are an output terminal of the battery pack. An positive electrode and a negative electrode of the battery in series are connected with pins 5, 6, 7, 8 and 9 of the integrated circuit in sequence. The utility model is characterized in that: a voltage sampling circuit, a reference voltage circuit, a voltage comparison circuit, a delay control circuit, a switch tube and a discharge load are connected in sequence between a positive electrode and a negative electrode of the battery, thus forming a balance circuit. The utility model is capable of realizing short discharge to batteries with higher voltage, restraining unmatched situations between batteries and fully charging each battery of the battery pack; has the advantages of easy operation and reliable product quality and is extensively suitable for a charger or discharger of lithium ion battery packs.
Description
Technical field
The utility model belongs to the lithium ionic battery protection circuit technical field, particularly relates to the special-purpose balance protection circuit of a kind of lithium ion battery.
Background technology
The protective circuit of current lithium ion battery special use adopts application-specific integrated circuit (ASIC) more, carries out overvoltage, under-voltage, the protection of overcurrent usually.Common lithium ion battery privacy protection circuit product model has BQ2058, MAX1666, MC33345 etc.; these products all do not have equalization function; promptly in the batteries charging process; when between cell, occur not matching; when the voltage climbing speed is inconsistent, adopt above-mentioned charging may cause the part battery not to be full of.
Summary of the invention
The utility model provides a kind of lithium ion battery special-purpose balance protection circuit for solving problems of the prior art.
The purpose of this utility model is to solve in the prior art to occur not matching when between cell; when the voltage climbing speed is inconsistent; can cause the part battery can not be full of the problem of electricity; provide a kind of simple in structure; battery to overtension carries out of short duration discharge; the voltage that suppresses between the battery does not match, and makes each battery in the battery pack all can be full of the special-purpose balance protection circuit of lithium ion battery of electricity.
The technical scheme that the special-purpose balance protection circuit of the utility model lithium ion battery is taked is:
The special-purpose balance protection circuit of lithium ion battery; contain integrated circuit (IC); three field effect transistor; the electronic circuit that resistor and two and above Series Sheet batteries constitute; the PACK+ of the special-purpose balance protection circuit of its lithium ion battery; PACK-is the output of battery pack; described Series Sheet batteries just; negative pole connects 5 of described integrated circuit (IC) successively; 6; 7; 8; 9 legs; be characterized in: the also have voltage sampling circuit of described single battery from connecting successively between positive best negative pole; voltage reference circuit; voltage comparator circuit; delay control circuit; switching tube and discharge load constitute equalizing circuit.
The utility model can also adopt following technical measures to realize:
These characteristics is: described integrated circuit (IC) model is MAX1666.
These characteristics is: in described two batteries that link to each other, the positive interpolar lead-out wire of the negative pole of a battery and next battery is a line.
These characteristics is: described each single battery is identical from the circuit that connects successively between positive best negative pole.
Advantage and the good effect that the utlity model has are:
The technical program has mainly solved in the batteries charging process; when between cell, occur not matching; when the voltage climbing speed is inconsistent; cause the part battery can not be full of the problem of electricity; strengthened the function of protective circuit, for the design of simplifying group charger, the useful life of improving batteries charging efficient and prolongation battery is significant; and it is simple in structure, with low cost.
Description of drawings
Fig. 1 is the control flow chart that constitutes the loop in the utility model with cell;
Fig. 2 is the utility model electrical wiring schematic diagram.
Label among the figure among the 1-2 is respectively: N1 is a single battery, N2 is a voltage sampling circuit, N3 is a voltage comparator circuit, N4 is a delay control circuit, and N5 is a voltage reference circuit, and N6 is a switching circuit, N7 is a discharge load, IC is an integrated circuit, and M1-M3 is a field effect transistor, and B1-B4 is a lithium ion battery, PACK+, PACK-are battery pack output plus terminal, negative terminal, U1 is a voltage-stabiliser tube, and OPAMP is an operational amplifier, and C1 is a capacitor, LED is a light-emitting diode, D1 is a rectifier diode, and G1, G2 are triode, and R1-R20 is a resistor.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, enumerate following examples now, and conjunction with figs. is described in detail as follows:
Please refer to Fig. 1-2; the special-purpose balance protection circuit of lithium ion battery; control circuit among the single-unit lithium ion battery B1-B4 of 4 series connection between single battery B4 positive and negative electrode comprises voltage sampling circuit N2; voltage comparator circuit N3; delay control circuit N4; voltage reference circuit N5, switching circuit N6, discharge load N7.Single battery B4 is anodal to connect in the integrated circuit (IC) that model is MAX1666 in 5 legs and control circuit V among field effect transistor M2 drain D, field effect transistor M3 drain D, resistor R 1 one ends, resistor R 3 one ends, the operational amplifier OPAMP
PWith V
OBetween the anode of an end, resistor R 10 1 ends and rectifier diode D1, single battery B4 negative pole connects among the IC in 6 legs and control circuit V among resistor R 2 one ends, voltage-stabiliser tube U1 anode, the operational amplifier OPAMP
NWith V
OBetween an end, LED negative electrode and triode G2 emitter, the negative electrode of triode G2 collector electrode and rectifier diode D1 connects and composes discharge load N7, forms the loop of battery B4 simultaneously; Triode G2 base stage is connected with triode G1 emitter, triode G1 collector electrode is connected with resistor 10, triode G1 base stage and resistor R 8, resistor R 9 and LED anode form series circuit, and triode G1, resistor 10, resistor R 8, resistor R 9 and LED constitute switching circuit N6; Capacitor C1 one end connects resistor R 7, resistor R 8, resistor R 9 simultaneously, and the other end connects resistor R 6, and capacitor C1 and resistor R 7 and resistor R 6 constitute delay control circuit N4; Output V among the operational amplifier OPAMP
OBe connected in-phase input end V with resistor R 7 one ends
PBe connected inverting input V with resistor R 5 one ends
NBe connected with R6 with resistor R 4 simultaneously, operational amplifier OPAMP, resistor R 4 and resistor R 5 constitute voltage comparator circuit N3; Voltage-stabiliser tube U1 negative electrode connects resistor R 3 and resistor R 4 simultaneously, and voltage-stabiliser tube U1 and resistor R 3 constitute voltage reference circuit N5; Resistor R 2 one ends connect resistor R 5 and resistor R 1 simultaneously, and resistor R 1 and resistor R 2 constitute voltage sampling circuit N2.Between single battery B3, B2, the B1 positive and negative electrode between control circuit and the battery B4 positive and negative electrode control circuit identical.Be same lead-out wire between battery B4 negative pole and the battery B3 positive pole; Be same lead-out wire between battery B3 negative pole and the battery B2 positive pole, and be connected with 7 legs in the integrated circuit (IC); Be same lead-out wire between battery B2 negative pole and the battery B1 positive pole, and be connected with 8 legs in the integrated circuit (IC).Battery B1 negative pole is connected the back simultaneously by resistor 14 and is connected with battery pack negative terminal PACK-with 10,11,12,13,14,20 legs in the integrated circuit (IC).Source S among the field effect transistor M1 simultaneously with integrated circuit (IC) in 1 leg, resistor R 13, field effect transistor M2 in source S, resistor R 12 and resistor R 11 be connected, grid G among the field effect transistor M1 is connected with source S, resistor R 12 and the other end of resistor R 11 in 2 legs, field effect transistor M3 in the integrated circuit (IC) simultaneously, and drain D is connected with battery pack anode PACK+ among the field effect transistor M1.Grid G among the field effect transistor M2 simultaneously with integrated circuit (IC) in 4 legs be connected with resistor R 13 other ends, the grid G among the field effect transistor M3 is connected with 3 legs in the integrated circuit (IC).In the integrated circuit (IC) 9,15,16,17,18 legs constitute the three-phase bridge loop with resistor 15,16,17,18,19,20 respectively.
The utility model also can adopt modularized design, can either reduce volume, weight, increases reliability again and reduces cost.In use, only the corresponding pin of corresponding signal and module need be linked to each other gets final product, and does not need to adjust parameter.
Operating principle of the present utility model is:
Resistor R 1, R2 constitutes the resistor potential-divider network, with battery voltage sampling, resistor R 3 and voltage-stabiliser tube U1 set accurate voltage reference 4.05-4.1V for, more than two voltage signals send into operational amplifier and compare, judge, when cell voltage is lower than the magnitude of voltage 4.05-4.1V of setting, control circuit is failure to actuate, when cell voltage surpasses 4.1V, and the duration surpasses output signal C1, during the time-delay control time 2-10S of R6, corresponding battery equalizer switch pipe G1 is activated, promote G2 as discharge load, battery is carried out balanced discharge, when battery reached the magnitude of voltage of setting, switching tube G1 was switched off, and all cell voltage equilibriums are full of between charge period thereby be implemented in.
Claims (4)
1. the special-purpose balance protection circuit of a lithium ion battery; contain integrated circuit (IC); three field effect transistor; the electronic circuit that resistor and two and above Series Sheet batteries constitute; the PACK+ of its lithium ion battery group balance protection circuit; PACK-is the output of battery pack; described Series Sheet batteries just; negative pole connects 5 of described integrated circuit (IC) successively; 6; 7; 8; 9 legs; it is characterized in that: the also have voltage sampling circuit of described single battery from connecting successively between positive best negative pole; voltage reference circuit; voltage comparator circuit; delay control circuit; switching tube and discharge load constitute equalizing circuit.
2. the special-purpose balance protection circuit of a kind of lithium ion battery according to claim 1, it is characterized in that: described integrated circuit (IC) model is MAX1666.
3. the special-purpose balance protection circuit of a kind of lithium ion battery according to claim 1 is characterized in that: in described two batteries that link to each other, the positive interpolar lead-out wire of the negative pole of a battery and next battery is a line.
4. the special-purpose balance protection circuit of a kind of lithium ion battery according to claim 1, it is characterized in that: described each single battery is identical from the circuit that connects successively between positive best negative pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320111956 CN2651946Y (en) | 2003-10-16 | 2003-10-16 | Special balancing protective circuit of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320111956 CN2651946Y (en) | 2003-10-16 | 2003-10-16 | Special balancing protective circuit of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2651946Y true CN2651946Y (en) | 2004-10-27 |
Family
ID=34344467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320111956 Expired - Fee Related CN2651946Y (en) | 2003-10-16 | 2003-10-16 | Special balancing protective circuit of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2651946Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007065362A1 (en) * | 2005-12-07 | 2007-06-14 | Byd Company Limited | Protective circuits for secondary battery packs |
| CN102195067A (en) * | 2010-03-11 | 2011-09-21 | 苏州宝时得电动工具有限公司 | Battery pack |
| CN108172912A (en) * | 2017-11-30 | 2018-06-15 | 宁德时代新能源科技股份有限公司 | Electricity core sampling circuit |
-
2003
- 2003-10-16 CN CN 200320111956 patent/CN2651946Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007065362A1 (en) * | 2005-12-07 | 2007-06-14 | Byd Company Limited | Protective circuits for secondary battery packs |
| US8129948B2 (en) | 2005-12-07 | 2012-03-06 | Byd Company Limited | Protective circuits for secondary battery packs |
| CN102195067A (en) * | 2010-03-11 | 2011-09-21 | 苏州宝时得电动工具有限公司 | Battery pack |
| CN102195067B (en) * | 2010-03-11 | 2014-10-08 | 苏州宝时得电动工具有限公司 | Battery pack |
| CN108172912A (en) * | 2017-11-30 | 2018-06-15 | 宁德时代新能源科技股份有限公司 | Electricity core sampling circuit |
| CN108172912B (en) * | 2017-11-30 | 2020-09-29 | 宁德时代新能源科技股份有限公司 | Electricity core sampling circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |