CN201307771Y - Large-capacity lithium-ion battery serially-connected combination protection balance module - Google Patents
Large-capacity lithium-ion battery serially-connected combination protection balance module Download PDFInfo
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- CN201307771Y CN201307771Y CNU2007201573218U CN200720157321U CN201307771Y CN 201307771 Y CN201307771 Y CN 201307771Y CN U2007201573218 U CNU2007201573218 U CN U2007201573218U CN 200720157321 U CN200720157321 U CN 200720157321U CN 201307771 Y CN201307771 Y CN 201307771Y
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Abstract
The utility model relates to a large-capacity lithium-ion battery serially-connected combination protection balance module; a special micro-power-consumption integrated circuit for a single lithium-ion battery is adopted as a detection controller of the voltage of a single battery, thereby reducing the self-consumed electric current and obtaining high-precise detection voltage. Each optical coupler is driven by an MOSFET, thereby realizing the logic integration and electric level moving of charging and discharging protection control signals of each single battery, and a Schmidt toggle circuit is adopted to shape the general discharging control signal; an MOSFET source follower circuit is utilized to realize the sampling and the voltage limit of the electric current value of a load circuit, and the multi-level current and the short-circuit detection function of the special integrated circuit is utilized to realize the current protection and the short-circuit protection as well as the status maintaining; a grouping voltage picking way is utilized to realize the power supply of the control circuit, thereby ensuring the balance of the self-consumption electric current of each battery; the lag return difference of the voltage for starting up the charging protection and for releasing the control signal is utilized to realize the intermittence balanced control mode.
Description
Affiliated technical field:
The utility model relates to a kind of charge and discharge protecting of high-capacity lithium-ion series battery and modular device of charge balancing of being used for, and the charging saturation of each battery cell is consistent in the time of can guaranteeing the safe in utilization of charge and discharge process with the charging end when the high capacity lithium ion battery series connection is used.
Background technology:
As everyone knows, lithium ion battery is at aspects such as energy density, specific energy, memory effect, cycle life and environmental protection, other battery incomparable advantage is all arranged, use the portable product that lithium ion battery is made, in light weight, volume is little, long service life, particularly environment is not polluted, be subjected to people's extensive attention.In recent years, in the portable electronic information product of mobile communication terminal, notebook computer, obtained widespread usage.But because the safe handling condition that discharges and recharges of the desired harshness of lithium ion battery, and when series connection is used because the pool-size that monomer capacity and charge-discharge characteristic imbalance cause descends the degradation problem significantly, make it in needing high-energy-density, high-energy-density and jumbo motive use field especially, be subjected to greatly restriction.Caused some to need the product of battery, be restricted such as the development of products such as electric bicycle as power source.
In recent years, because the novel electrode material and the improvement of manufacture craft, the lithium ion battery of big capacity and high rate discharge has been obtained breakthrough progress, the battery cell of making can satisfy some application as power source fully, particularly after the multiple batteries combination, gone for such as application at aspects such as electric bicycle and even hybrid vehicles, this makes lithium ion battery have unusual wide prospect in new field, simultaneously also to its application product---and the development such as products such as electric bicycle and hybrid vehicles has good facilitation.
Need to use a plurality of battery cells to be together in series during these are used and form a battery pack use, the charging saturation of each battery cell reached consistent when this just needed an electronic installation to guarantee the safe in utilization of charge and discharge process with the charging end, with the safe handling of assurance battery pack and the maximum performance of battery combination capacity.At present, existing multiple scheme realizes these functions, and the employing comparator exclusive disjunction amplifier that has makes comparing with multistage a reference source of every batteries voltage, and with after the comprehensive computing of the comparative result of each joint, is discharged and recharged and the equalizer switch control signal; The lithium ion privacy protection integrated circuit of the employing 3-4 that has joint, that makes up that it discharges and recharges that control signal obtains battery pack always discharges and recharges control signal, obtains balanced control signal with comparator exclusive disjunction amplifier and a reference source and every batteries voltage ratio again; Employing comparator exclusive disjunction amplifier that has and multistage a reference source and every batteries voltage ratio after, after adopting comprehensive its comparative result of single-chip microcomputer, control total charge and discharge switch of balanced loop of each batteries and battery pack, realize the charge balancing of battery and the security control that discharges and recharges.In these schemes; one or more pieces comparator exclusive disjunction amplifiers and a reference source and other control circuit have all inevitably been used; ubiquity consumable electric current big (several mA-tens mA), protection and balanced operation voltage precision is low, interference free performance is poor, shortcoming such as big, the failure rate height of caloric value when balanced, causes that its safety effect lost efficacy, fatal problem such as self damage when battery was placed in the long period.
Summary of the invention:
In order to overcome consumable electric current big (several mA-tens mA), protection and the shortcomings such as balanced operation voltage precision is low, interference free performance is poor, balanced caloric value is big, failure rate height that existing product exists, the utility model provides a kind of, cascade combined protection equilibrium module for large-capacity lithium ion battery that reliability high little from low, the balanced caloric value of power consumption electric current.
The scheme that the utility model adopts is: the micropower integrated circuit that adopts the special use of single-unit lithium ion battery is as the detection of battery cell voltage and the controller of charge and discharge protecting control logic signal, the lagging voltage return difference of utilizing its charge protection to start and discharge realizes the balanced control model of batch (-type); Adopt optical coupler to realize the comprehensive and current potential translation that discharges and recharges control signal of each battery cell; Adopt the sampling and the voltage limit of the source follower realization load circuit current value of metal-oxide-semiconductor, utilize the micropower integrated circuit electric current of single-unit lithium ion battery special use and function of short circuit detection to realize overcurrent and short-circuit protection; The source follower of employing metal-oxide-semiconductor is realized the whole battery group power taking supply of total drive circuit.
The beneficial effects of the utility model are:
1, reduced effectively module from power consumption electric current (less than 1mA), and the consumable electric current of each monomer keep to be equated;
2, voltage detecting precision height is reliable and stable;
3, reduced the caloric value of equalizing circuit, quickened the switching speed of total discharge prevention metal-oxide-semiconductor, the dynamic power consumption when having reduced its action has been realized keeping at the state of overload and short-circuit protection, avoid the action of concussion repeatedly of discharge prevention metal-oxide-semiconductor, improved the reliability of module;
4, whole group power taking guarantees that the consumable electric current of each battery cell keeps balance;
5, can set the protection threshold values of overload current arbitrarily.
Description of drawings:
Accompanying drawing 1 is the micropower integrated circuit that adopt to adopt the special use of single-unit lithium ion battery as the circuit theory diagrams of the controller of the detection of battery cell voltage and charge and discharge protecting control logic signal;
Accompanying drawing 2 is to adopt Schmidt circuit charging control signal to be carried out the principle explanation of shaping;
Accompanying drawing 3 is to utilize the micropower integrated circuit charge protection of single-unit lithium ion battery special use to start and release lagging voltage return difference, realizes the principle explanation of the balanced control model of batch (-type);
Embodiment:
As shown in Figure 1; i joint lithium ion battery privacy protection circuit (the integrated circuit model of use is: the S-8261 that NSK electronics corporation produces or R-5400 or R-5402 or R-5421 or the R-5422 or the R-5426 series of S-8241 series or Japan Ricoh electron production) UAi is connected the two ends of each cell; connect into battery pack with each battery cell with the form of connecting; UAi detects a battery cell voltage; produce the monomer over-charge protective CO of overvoltage (when generally occurring in charging) and under voltage (when generally occurring in discharge or static the placement) and cross and put protection DO control signal; after metal-oxide-semiconductor (TBi and TAi) amplifies respectively, import optical coupler (UBi and UCi) respectively.The over-charge protective CO that each cell produces and cross put the optical coupler (UB1-UBn and UC1-UCn) of protection DO control signal by the output triode series connection after; finish over-charge protective CO respectively and cross the AND operation of putting protection DO; when wherein some battery cells are detected overvoltage or under voltage; corresponding optical coupler series loop is turned off; at total over-charge protective CO with cross on the load resistance R4 put protection DO output loop or the R3 and obtain low level, so just finished each battery cell battery control signal comprehensively and electrical level transfer.
Adopt the usefulness of the special-purpose integrated protective circuit of single-unit lithium ion battery to be: can reduce the consumable electric current of testing circuit, realize the little consumption detection of cell voltage, and the accuracy of detection height, good stability.
Quilt is comprehensive and move to the grid that low level total charging control signal CO is connected to charging control metal-oxide-semiconductor T3, is used to control the break-make of charge circuit; And by comprehensive and move to the input that low level total discharge control signal DO is connected to the CMOS gate circuit (integrated circuit that relates to is CD4093 or CD40106) of schmidt trigger input characteristics, and be connected on the grid of metal-oxide-semiconductor T2 of discharge control usefulness the break-make in control battery power discharge loop after a plurality of schmidt door circuit are connected in parallel.
Adopt the cmos schmitt gate circuit and adopt the usefulness of a plurality of output-parallels to be: the switching speed (as shown in Figure 2) that improves discharge control signal, increase driving force, quicken the switching speed of discharge control metal-oxide-semiconductor, reduce the failure rate of metal-oxide-semiconductor, improve the reliability of complete machine.
The over-charge protective CO end that each cell connects privacy protection integrated circuit UAi is connected to the grid of TCi and the light-emitting diode of UCi after metal-oxide-semiconductor TBi is anti-phase, when UAi detects overvoltage signal, CO holds output low level, pass through the comprehensive and electrical level transfer circuit of the CO control signal of forming by optical coupler, charging control metal-oxide-semiconductor T3 is turn-offed, cut off charge circuit; Make simultaneously the TCi conducting after TBi is anti-phase, the positive pole of battery BATi will play balanced effect by RBiA-RBim and metal-oxide-semiconductor TCi output current.When dropping to the following threshold values of overvoltage protection under the effect of cell voltage at discharging current, the over-charge protective CO end output high level of UAi, pass through the comprehensive and electrical level transfer circuit of the CO control signal of forming by optical coupler, make charging control metal-oxide-semiconductor T3 conducting, connect charge circuit, get back to charged state; Simultaneously TCi is ended, cut off the electric current of equalizing resistance RBiA-RBim, close balanced loop.In the whole battery group, reach earlier and be full of electricity condition and will make whole battery group be in the batch (-type) state of charging-equilibrium-charging, as shown in Figure 3, all reach the state that is full of up to all batteries.
Adopt the usefulness of the over-charge protective CO signal controlling equalizing circuit of privacy protection integrated circuit UAi to be: to make balanced loop be in the service intermittent state; reduce the balanced circuit heating that causes; make battery pack can be in charged state for a long time, improve the reliability of complete machine.
The source electrode of metal-oxide-semiconductor T1 is received the VM end that is positioned at the privacy protection integrated circuit UA1 on the minimum single-unit lithium ion battery BAT1 of current potential, and grid is received the positive pole of BAT1, and the negative output terminal PACK-of battery pack is received in its drain electrode.Because T1 has been connected into the form of source follower; during operate as normal; the voltage of its grid always is higher than the threshold voltage of source electrode; therefore the source electrode of T1 and drain electrode are connected; the negative terminal voltage of battery pack output by R2 and R1 dividing potential drop after, be connected to the current detecting pin VM end of UA1, be used for detecting overload and short circuit current; by regulating the ratio of R2 and R1, can change the protection operating value of overload current.When external circuit overload or short circuit, the metal-oxide-semiconductor of discharge control turn-offs, the voltage of the negative output terminal PACK-of battery pack raises until the voltage near the battery pack anode, hang down behind the grid source open valve threshold voltage of a metal-oxide-semiconductor promptly by clamper because T1 effect is increased to than the positive terminal voltage of BAT1 the voltage of the current detecting pin DM of UA1, guaranteed the safety of its work; Owing to drawing effect on the external loading, make it remain on this state when external loading is disconnected simultaneously, could under the drop-down effect of R1 and DM internal resistance, get back to low level, reclosing discharge control metal-oxide-semiconductor.
Adopt the current detecting pin VM of single-unit lithium ion battery privacy protection integrated circuit UA1 and usefulness that metal-oxide-semiconductor T1 detects electric current to be: 1. need not to adopt independent a reference source, comparator exclusive disjunction amplifier to make up current detection circuit, reduce complete machine from the power consumption electric current; 2. make full use of the multistage current sense function of single-unit lithium ion battery privacy protection integrated circuit, adapting to unequally loaded uses, and overload or short-circuit condition are kept, avoid producing concussive protection and damage discharge control metal-oxide-semiconductor, improve the reliability of complete machine; 3. use R1 and R2 dividing potential drop to obtain the needed detection voltage of current detecting pin VM, can set the detected value of overload current arbitrarily.
Constituted reference voltage source by R6 and Z1, be used for providing reference voltage to the grid of metal-oxide-semiconductor T4, the drain electrode of T4 is connected to the positive output end of battery pack by resistance R 5, source electrode is connected to the collector electrode of the output triode of input of CMOS gate circuit power supply and optical coupler, and the formation source follower circuit is used for providing power supply to the series loop of the output triode of CMOS gate circuit and optical coupler.
The usefulness of the power-supply circuit that is made of R6, Z1 and T4 is: the electric current of supply comes from all battery cells, can guarantee that the consumable electric current of each battery cell is consistent.
Claims (3)
1; a kind of cascade combined protection equilibrium module for large-capacity lithium ion battery; form by battery detection circuit unit and public control section that some joint structures are identical; wherein i batteries testing circuit unit is by single-unit lithium ion privacy protection circuit UAi; metal-oxide-semiconductor TAi; TBi; TCi; photoelectrical coupler UBi; UCi and equalizing resistance RBia～RBim forms; public control section comprises by T1; R1; the current detection circuit that R2 forms; T4; Z1; R5; the power supply circuit that R6 forms; Schmidt's plastic drive circuit U1 and by T2; the master switch circuit that T3 constitutes; it is characterized in that: some joint lithium ion batteries and detection thereof and equalizing circuit link together in the mode of series connection; the i batteries just; negative pole is connected to V and the G end of single-unit lithium ion privacy protection circuit UAi; the DO output of UAi is connected to the negative electrode of the light-emitting diode of optical coupler UCi after metal-oxide-semiconductor TAi is anti-phase; the photoelectric yield pipe of optical coupler UC1～UCn is cascaded; the total DO control signal of emitter output from UC1; the input that is connected to Schmidt circuit U1 and connects together; the output of Schmidt circuit U1 also connects together; be connected to the grid of metal-oxide-semiconductor T2; the CO output of UAi is after metal-oxide-semiconductor TBi is anti-phase; one the tunnel is connected to the source electrode of TCi; its drain electrode output is connected to equalizing resistance RBia～RBim as balanced control signal; another road is connected to the negative electrode of the light-emitting diode of optical coupler UBi; the photoelectric yield pipe of optical coupler UB1～UBn is cascaded; produce total CO control signal; be connected to the grid of metal-oxide-semiconductor T3 by D1; the drain electrode of metal-oxide-semiconductor T1 and T3 also is attached to the negative defeated end PACK-of battery pack; the grid of T1 links to each other with the anode of BAT1; source electrode output is through R1; after the R2 dividing potential drop; be connected to the VM end of UA1; the anode of Z1 is with after the grid of T4 links to each other; be connected to the positive pole of battery BATn by R5; the drain electrode of T4 is connected to the positive pole of BATn by R5, and the source electrode of T4 is connected to power end and the optical coupler UBn of U1; the collector electrode of UCn.
2, cascade combined protection equilibrium module for large-capacity lithium ion battery according to claim 1; it is characterized in that: the testing circuit of each batteries monomer has adopted the micropower integrated circuit of single-unit lithium ion battery special use; required integrated circuit model is S-8261 or the S-8241 series that NSK electronics corporation produces, or the R-5400 of Japan Ricoh electron production or R-5402 or R-5421 or R-5422 or R-5426 series.
3, cascade combined protection equilibrium module for large-capacity lithium ion battery according to claim 1 is characterized in that: the model that is used to drive the schmidt door circuit of T2 grid is CD4093 or CD40106.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201573218U CN201307771Y (en) | 2007-11-22 | 2007-11-22 | Large-capacity lithium-ion battery serially-connected combination protection balance module |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201573218U CN201307771Y (en) | 2007-11-22 | 2007-11-22 | Large-capacity lithium-ion battery serially-connected combination protection balance module |
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| CN201307771Y true CN201307771Y (en) | 2009-09-09 |
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| CNU2007201573218U Expired - Fee Related CN201307771Y (en) | 2007-11-22 | 2007-11-22 | Large-capacity lithium-ion battery serially-connected combination protection balance module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102273045A (en) * | 2009-01-30 | 2011-12-07 | Sk新技术 | Charge equalization apparatus for series-connected battery string using regulated voltage source |
| CN102520360A (en) * | 2011-12-02 | 2012-06-27 | 苏州冠硕新能源有限公司 | Battery voltage detection system in battery pack and method for detecting voltage and correcting error by employing system |
| CN108702005A (en) * | 2017-04-06 | 2018-10-23 | 深圳中兴力维技术有限公司 | A kind of online equalization methods of accumulator group and its system |
| CN108711899A (en) * | 2018-05-03 | 2018-10-26 | 自贡同发荣实业有限公司 | A kind of lithium battery group |
-
2007
- 2007-11-22 CN CNU2007201573218U patent/CN201307771Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102273045A (en) * | 2009-01-30 | 2011-12-07 | Sk新技术 | Charge equalization apparatus for series-connected battery string using regulated voltage source |
| CN102273045B (en) * | 2009-01-30 | 2014-04-16 | Sk新技术 | Charge equalization apparatus for series-connected battery string using regulated voltage source |
| CN102520360A (en) * | 2011-12-02 | 2012-06-27 | 苏州冠硕新能源有限公司 | Battery voltage detection system in battery pack and method for detecting voltage and correcting error by employing system |
| CN102520360B (en) * | 2011-12-02 | 2014-10-15 | 苏州和钧新能源有限公司 | Battery voltage detection system in battery pack and method for detecting voltage and correcting error by employing system |
| CN108702005A (en) * | 2017-04-06 | 2018-10-23 | 深圳中兴力维技术有限公司 | A kind of online equalization methods of accumulator group and its system |
| CN108711899A (en) * | 2018-05-03 | 2018-10-26 | 自贡同发荣实业有限公司 | A kind of lithium battery group |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20101122 |