CN201290017Y - Equilibrium device for charging and discharging power lithium ion battery set - Google Patents
Equilibrium device for charging and discharging power lithium ion battery set Download PDFInfo
- Publication number
- CN201290017Y CN201290017Y CNU2008201871442U CN200820187144U CN201290017Y CN 201290017 Y CN201290017 Y CN 201290017Y CN U2008201871442 U CNU2008201871442 U CN U2008201871442U CN 200820187144 U CN200820187144 U CN 200820187144U CN 201290017 Y CN201290017 Y CN 201290017Y
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- positive
- negative
- resistor
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- ring
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 46
- 238000007600 charging Methods 0.000 title claims abstract description 25
- 238000007599 discharging Methods 0.000 title claims abstract description 14
- 239000000178 monomer Substances 0.000 description 31
- 239000003990 capacitor Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
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Classifications
-
- 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)
Abstract
一种动力锂离子电池组充放电均衡装置，包括充放电模块和串联在一起的多个单体锂离子电池，还包括单片机、正极环、负极环、电机、均衡电池以及连接每个单体电池正、负极的固定触点，每个单体锂离子电池的正、负极均与单片机的输入端连接，单片机的输出端分别与充放电模块和电机连接，电机的主轴上固定有旋转块，旋转块上分别固定有与正极环电连接的正极动触点以及与负极环电连接的负极动触点，且正极动触点和负极动触点分别与相邻的两个固定触点电连接，均衡电池的正极与正极环连接，均衡电池的负极与负极环电连接。也可以将均衡电池换成超级电容。本实用新型电路结构简单，成本低，安全可靠，并能提高动力锂离子电池组的使用寿命。
A charge-discharge equalization device for a power lithium-ion battery pack, including a charge-discharge module and a plurality of single-cell lithium-ion batteries connected in series, and also includes a single-chip microcomputer, a positive electrode ring, a negative electrode ring, a motor, a balancing battery, and connections to each single battery The fixed contacts of the positive and negative poles, the positive and negative poles of each single lithium-ion battery are connected to the input terminal of the single-chip microcomputer, and the output terminals of the single-chip microcomputer are respectively connected to the charging and discharging module and the motor, and the rotating block is fixed on the main shaft of the motor. A positive movable contact electrically connected to the positive ring and a negative movable contact electrically connected to the negative ring are respectively fixed on the block, and the positive movable contact and the negative movable contact are respectively electrically connected to two adjacent fixed contacts, The positive pole of the balanced battery is connected to the positive pole ring, and the negative pole of the balanced battery is electrically connected to the negative pole ring. It is also possible to replace the balance battery with a supercapacitor. The utility model has the advantages of simple circuit structure, low cost, safety and reliability, and can improve the service life of the power lithium ion battery pack.
Description
Technical field
The utility model relates to the power lithium-ion battery field, specifically, relates to a kind of charging and discharging balance device for lithium ion power battery group.
Background technology
The voltage of power lithium-ion battery group is by the cell quantity decision of series connection, and capacity then is the cell quantity decision by parallel connection.The voltage range of each cell just can obtain needed voltage 2V～5V (relevant with the positive electrode of dynamic lithium battery) so the power lithium-ion battery series connection need be used.During perfect condition, each cell performance should be consistent, the voltage that is each cell is certain, but because foozle, self-discharge rate, the factors such as discreteness of attenuation degree between cell in the use, voltage capacity between the cell can be discrepant, in manufacture process and the entire product life cycle, the distribution of the variation of cell capacity and self discharge leakage contribution cell voltage, so working power lithium ion battery management circuit improves the performance and the life-span of the power lithium-ion battery of series connection use, is the method for the most effective management cell.A good equalizing circuit can be reacted rapidly to unusual cell.Existing conventional cell equalization has two kinds, promptly passive equalization and active equalization.
Three kinds of passive equalizations, passive equalization has three kinds: 1) the direct structure in parallel with cell of resistance, 2) structure of the resistance parallel connection of switch control, 3) structure of employing zener diode, now structures that adopt with the resistance parallel connection of switch control more, with resistance of switching circuit series connection, when monomer voltage is higher than predefined magnitude of voltage, switch connection.When monomer voltage was lower than predefined magnitude of voltage, switch cut out.This structure need be measured monomer voltage, can increase cost, and the very big power loss of generation on the resistance that is increased in owing to bleeder resistance, this loss is relevant with resistance value and size of current, there is time enough to finish balancing procedure, can cause overvoltage when high-capacity dynamical lithium-ion battery is charged with peak power, particularly evident to lithium iron phosphate dynamic battery especially, this usual manner prevents that overvoltage is powerless.
The active equalizing circuit
The passive balanced time that needs of the time ratio that the active equalizing circuit is wanted is short, and the voltage distribution precision equates, and parasitic loss is little.If reach capacity voltage, circuit carries out equilibrium by a bypass effect that is connected in parallel on the small-power resistance on the cell.The effect of this resistance is identical with passive balance-type.But because euqalizing current is big, balanced time course can be very short.When being lower than limiting voltage, resistance is inoperative.Charging current can be very big, and when bypass segment worked, electric current can be higher, but will be subjected to the restriction (general upper limit current 100mA) of parallel resistance, so this circuit can not be used in electric motor car.Because during car brakeing, the charging current that feedback braking produces is much larger than 100mA, and this can damage entire circuit, and the charging of electric motor car feedback braking is with ineffective and meaning will to reach several amperes (when looking regenerative braking the speed of a motor vehicle and determine).
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of circuit structure simple, and cost is low, safe and reliable charging and discharging balance device for lithium ion power battery group.
The technical scheme that realizes above-mentioned purpose is: a kind of charging and discharging balance device for lithium ion power battery group, comprise charge-discharge modules and a plurality of monomer lithium ion batteries that are cascaded, also comprise single-chip microcomputer, anode ring, the negative pole ring, motor, balancing battery and just connect each cell, the fixed contact of negative pole, each monomer lithium ion battery just, negative pole all is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is electrically connected with charge-discharge modules and motor respectively, be fixed with spill spin block on the main shaft of motor, be fixed with anodal moving contact that is electrically connected with anode ring and the negative pole moving contact that is electrically connected with the negative pole ring on the spill spin block respectively, and anodal moving contact and negative pole moving contact are electrically connected with adjacent two fixed contacts respectively, the positive pole of balancing battery is electrically connected with anode ring, and the negative pole of balancing battery is electrically connected with the negative pole ring.
Further, be parallel with a switch equalizing circuit on the balancing battery.
After adopting technique scheme, the positive pole of balancing battery is electrically connected with anodal moving contact on the spill spin block by anode ring, the negative pole of balancing battery is electrically connected with negative pole moving contact on the spill spin block by the negative pole ring, during charging, spill spin block rotates under the drive of motor, and drive anodal moving contact and negative pole moving contact and be electrically connected with the both positive and negative polarity of each cell in the power lithium-ion battery group circularly respectively, when power lithium-ion battery reaches each preset lower limit, balancing battery begins initiatively balanced operation, when if the voltage of a certain cell is higher than balancing battery, balancing battery is stored in energy storage in the balancing battery with absorption current, the monomer electric current that is equivalent to release in the internal resistance equalization plays the bypass effect and carries out balanced function, when touching a certain monomer battery voltage and be lower than balancing battery, balancing battery will fill the electric energy rapid release that stores to this cell, the voltage of this cell raises rapidly, and the like the periodic duty equilibrium between each cell.
In power ion battery group discharge process, because the variation of the various operating modes of each monomer, voltage between each monomer and capacity will produce notable difference, at this moment balancing battery will be to each cell balanced discharge, if the voltage of a certain cell that moving contact touches is lower than balancing battery, balancing battery will be to this cell complementary energy of charging rapidly, until with the balancing battery balance of voltage.When touching a certain monomer battery voltage and be higher than balancing battery, promptly charging releases energy this cell to balancing battery, the energy between balanced each monomer of work that the rest may be inferred.
In a word, when discharging and recharging, the utility model can each cell is too high voltage absorb and to be stored in the balancing battery, and also can the cell of brownout be charged rapidly, thereby the cell that keeps making series connection charges, is in all the time when discharging balanced consistent state, make each cell life-saving, can not influence the available capacity and the life-span of entire lithium ion battery group because of the capacity attenuation of a certain cell.
The another kind of technical scheme that realizes above-mentioned purpose is: a kind of charging and discharging balance device for lithium ion power battery group, comprise charge-discharge modules and a plurality of monomer lithium ion batteries that are cascaded, also comprise single-chip microcomputer, anode ring, the negative pole ring, motor, super capacitor and just connect each cell, the fixed contact of negative pole, each monomer lithium ion battery just, negative pole all is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with motor, be fixed with spill spin block on the main shaft of motor, be fixed with anodal moving contact that is electrically connected with anode ring and the negative pole moving contact that is electrically connected with the negative pole ring on the spill spin block respectively, and anodal moving contact and negative pole moving contact are electrically connected with adjacent two fixed contacts respectively, the positive pole of super capacitor is connected with anode ring, and the negative pole of super capacitor is electrically connected with the negative pole ring.
By paralleling switch equalizing circuit in equilibrium, make that the switch equalizing circuit can be forced big electric current release voltage, can not overcharge with absolute assurance cell when overcharging especially unusually appearred in charging system.
Another kind of technical scheme of the present utility model is: a kind of charging and discharging balance device for lithium ion power battery group, comprise charge-discharge modules and a plurality of monomer lithium ion batteries that are cascaded, also comprise single-chip microcomputer, anode ring, the negative pole ring, motor, super capacitor and just connect each cell, the fixed contact of negative pole, each monomer lithium ion battery just, negative pole all is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with motor with charge-discharge modules respectively, be fixed with spill spin block on the main shaft of motor, be fixed with anodal moving contact that is electrically connected with anode ring and the negative pole moving contact that is electrically connected with the negative pole ring on the spill spin block respectively, and anodal moving contact and negative pole moving contact are electrically connected with adjacent two fixed contacts respectively, the positive pole of super capacitor is electrically connected with anode ring, and the negative pole of super capacitor is electrically connected with the negative pole ring.
This scheme is compared with first kind of technical scheme, has just changed balancing battery into super capacitor.Its operation principle is the same with first kind of scheme, can reach the purpose and the technique effect of foregoing first kind of scheme equally.
Description of drawings
Fig. 1 is the circuit theory diagrams of first kind of technical scheme of the present utility model;
Fig. 2 is the winding diagram of first kind of technical scheme of the utility model;
Fig. 3 is the circuit theory diagrams of switch equalizing circuit of the present utility model;
Fig. 4 is the circuit theory diagrams of second kind of technical scheme of the present utility model;
Fig. 5 is the winding diagram of second kind of technical scheme of the utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Embodiment one
As Fig. 1, shown in 2, a kind of charging and discharging balance device for lithium ion power battery group, comprise charge-discharge modules 1 and a plurality of monomer lithium ion batteries that are cascaded, also comprise single-chip microcomputer 2, anode ring 3, negative pole ring 4, motor 5, balancing battery 6 and just connect each cell, the fixed contact 7 of negative pole, each monomer lithium ion battery just, negative pole all is connected with the input of single-chip microcomputer 2, the output of single-chip microcomputer 2 is electrically connected with charge-discharge modules 1 and motor 5 respectively, be fixed with spill spin block 8 on the main shaft of motor 5, be fixed with anodal moving contact 9 that is electrically connected with anode ring 3 and the negative pole moving contact 10 that is electrically connected with negative pole ring 4 on the spill spin block 8 respectively, and anodal moving contact 9 and negative pole moving contact 10 are electrically connected with adjacent two fixed contacts 7 respectively, the positive pole of balancing battery 6 is electrically connected with anode ring 3, and the negative pole of balancing battery 6 is electrically connected with negative pole ring 4.Single-chip microcomputer 2 adopts 890 chips.Motor 5 adopts stepping motor or reducing motor.
As shown in Figure 1, 2, be parallel with a switch equalizing circuit 11 on the balancing battery 6.
As shown in Figure 3, switch equalizing circuit 11 is made up of resistance R 1, resistance R 2, resistance R W, voltage-stabiliser tube DW and triode BG1, the positive pole of resistance R 1 is connected with the positive pole of balancing battery 6, resistance R 1 is connected with the negative pole of voltage-stabiliser tube DW, the positive pole of voltage-stabiliser tube DW is connected with the base stage of triode BG1, resistance R W is connected the collector electrode of triode BG1, and the positive pole of resistance R 2 is connected with the negative pole of resistance R 1, and the negative pole of resistance R 2 is connected with the negative pole of balancing battery 6.
The operation principle of embodiment one is as follows: during charging, spill spin block 8 rotates under the drive of motor 5, and drive anodal moving contact 9 and negative pole moving contact 10 and be electrically connected with the both positive and negative polarity of each cell in the power lithium-ion battery group circularly respectively, when power lithium-ion battery reaches each preset lower limit, balancing battery 6 beginnings are balanced operation initiatively, when if the voltage of a certain cell is higher than balancing battery 6, balancing battery 6 is stored in energy storage in the balancing battery 6 with absorption current, the monomer electric current that is equivalent to release in the internal resistance equalization plays the bypass effect and carries out balanced function, when touching a certain monomer battery voltage and be lower than balancing battery 6, balancing battery 6 will fill the electric energy rapid release that stores to this cell, the voltage of this cell raises rapidly, and the like the periodic duty equilibrium between each cell.
In power ion battery group discharge process, because the variation of the various operating modes of each monomer, voltage between each monomer and capacity will produce notable difference, at this moment balancing battery 6 will be to each cell balanced discharge, if the voltage of a certain cell that moving contact touches is lower than balancing battery 6, balancing battery 6 will be to this cell complementary energy of charging rapidly, until with balancing battery 6 balances of voltage.When touching a certain monomer battery voltage and be higher than balancing battery 6, promptly 6 chargings release energy this cell to balancing battery, the energy between balanced each monomer of work that the rest may be inferred.
Embodiment two
As Fig. 4, shown in 5, a kind of charging and discharging balance device for lithium ion power battery group, comprise charge-discharge modules (1) and a plurality of monomer lithium ion batteries that are cascaded, also comprise single-chip microcomputer 2, anode ring 3, negative pole ring 4, motor 5, balancing battery 6 and just connect each cell, the fixed contact 7 of negative pole, each monomer lithium ion battery just, negative pole all is connected with the input of single-chip microcomputer 2, the output of single-chip microcomputer 2 is electrically connected with charge-discharge modules 1 and motor 5 respectively, be fixed with spill spin block 8 on the main shaft of motor 5, be fixed with anodal moving contact 9 that is electrically connected with anode ring 3 and the negative pole moving contact 10 that is electrically connected with negative pole ring 4 on the spill spin block 8 respectively, and anodal moving contact 9 and negative pole moving contact 10 are electrically connected with adjacent two fixed contacts 7 respectively, the positive pole of balancing battery 6 is electrically connected with anode ring 3, and the negative pole of balancing battery 6 is electrically connected with negative pole ring 4.Shell fragment machine 2 adopts 890 chips.Motor 5 adopts stepping motor or reducing motor.
Shown in Fig. 4,5, be parallel with a switch equalizing circuit 11 on the balancing battery 6.Circuit theory diagrams shown in Figure 3 among the circuit theory diagrams of this switch equalizing circuit and the embodiment one are identical.
The operation principle of embodiment two is as follows: during charging, spill spin block 8 rotates under the drive of motor 5, and drive anodal moving contact 9 and negative pole moving contact 10 and be electrically connected with the both positive and negative polarity of each cell in the power lithium-ion battery group circularly respectively, when power lithium-ion battery reaches each preset lower limit, super capacitor 12 beginnings are balanced operation initiatively, when if the voltage of a certain cell is higher than super capacitor 12, super capacitor 12 is stored in energy storage in the super capacitor 12 with absorption current, the monomer electric current that is equivalent to release in the internal resistance equalization plays the bypass effect and carries out balanced function, when touching a certain monomer battery voltage and be lower than super capacitor 12, super capacitor 12 will fill the electric energy rapid release that stores to this cell, the voltage of this cell raises rapidly, and the like the periodic duty equilibrium between each cell.
In power ion battery group discharge process, because the variation of the various operating modes of each monomer, voltage between each monomer and capacity will produce notable difference, at this moment super capacitor 12 will be to each cell balanced discharge, if the voltage of a certain cell that moving contact touches is lower than super capacitor 12, super capacitor 12 will be to this cell complementary energy of charging rapidly, until with super capacitor 12 balances of voltage.When touching a certain monomer battery voltage and be higher than super capacitor 12, promptly 12 chargings release energy this cell to super capacitor, the energy between balanced each monomer of work that the rest may be inferred.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201871442U CN201290017Y (en) | 2008-09-25 | 2008-09-25 | Equilibrium device for charging and discharging power lithium ion battery set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201871442U CN201290017Y (en) | 2008-09-25 | 2008-09-25 | Equilibrium device for charging and discharging power lithium ion battery set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201290017Y true CN201290017Y (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201871442U Expired - Lifetime CN201290017Y (en) | 2008-09-25 | 2008-09-25 | Equilibrium device for charging and discharging power lithium ion battery set |
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| CN (1) | CN201290017Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882803A (en) * | 2010-06-11 | 2010-11-10 | 李小平 | Balanced management system of series battery pack on basis of capacitance and management method thereof |
| CN101888106A (en) * | 2010-06-11 | 2010-11-17 | 李小平 | Equalization management system and method of series connected battery pack |
| CN101895135A (en) * | 2010-06-11 | 2010-11-24 | 李小平 | Balanced management system for series connected battery pack based on auxiliary battery and management method thereof |
| CN106532846A (en) * | 2016-12-13 | 2017-03-22 | 高玮 | Battery equalization system |
-
2008
- 2008-09-25 CN CNU2008201871442U patent/CN201290017Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882803A (en) * | 2010-06-11 | 2010-11-10 | 李小平 | Balanced management system of series battery pack on basis of capacitance and management method thereof |
| CN101888106A (en) * | 2010-06-11 | 2010-11-17 | 李小平 | Equalization management system and method of series connected battery pack |
| CN101895135A (en) * | 2010-06-11 | 2010-11-24 | 李小平 | Balanced management system for series connected battery pack based on auxiliary battery and management method thereof |
| CN101895135B (en) * | 2010-06-11 | 2013-01-02 | 李小平 | Balanced management system for series connected battery pack based on auxiliary battery and management method thereof |
| CN106532846A (en) * | 2016-12-13 | 2017-03-22 | 高玮 | Battery equalization system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090812 Effective date of abandoning: 20080925 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20090812 Effective date of abandoning: 20080925 |