CN103187754A - Novel capacitance balancing method of battery pack for electric car - Google Patents
Novel capacitance balancing method of battery pack for electric car Download PDFInfo
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- CN103187754A CN103187754A CN2012105638537A CN201210563853A CN103187754A CN 103187754 A CN103187754 A CN 103187754A CN 2012105638537 A CN2012105638537 A CN 2012105638537A CN 201210563853 A CN201210563853 A CN 201210563853A CN 103187754 A CN103187754 A CN 103187754A
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Abstract
The invention relates to a novel capacitance balancing method of a battery pack for an electric car. A specific structure consists of a negative electrode balance selection switch, a positive electrode balance selection switch, an energy transfer capacitance negative electrode selection switch, an auxiliary charging capacitor, an energy transfer capacitor, a tandem switch and an auxiliary charging capacitance selection switch, and is suitable for balancing the battery pack and super-capacitor banks for different electric cars and hybrid power cars, and is characterized by consisting of an energy transfer capacitor 8 and an auxiliary charging capacitor 7, and different circuits can be selected or disconnected through the selection switches.
Description
Technical field
What the present invention relates to is a kind of battery for electric automobile group novel capacitor equalization methods, is applicable to that various electric automobiles, Hybrid Vehicle battery pack and super capacitor group etc. do battery balanced use, is particularly suitable for pure electric automobile and uses.
Background technology
Present electric automobile or hybrid vehicle, cell to discharge and recharge the life-span better, battery life sharply descends in groups, for the life-span that prolongs into Battery pack has proposed cell balancing, this technology is a key technology of electric automobile or hybrid power automobile battery group technology, wherein the electric capacity equalization is a kind of typical method, utilize electric capacity as carrier of energy, energy is transferred on the low monomer of energy from the high monomer of energy, thereby the equilibrium of cell electric weight in the realization battery pack, but existing method exists major defect that length consuming time is arranged, namely from the high cell charging of energy, discharge to the low cell of energy, and voltage difference between the two is not very big, each finite energy that shifts causes electric capacity equalization length consuming time based on this reason.
Summary of the invention
The present invention seeks to provides a kind of battery for electric automobile group novel capacitor equalization methods at above-mentioned weak point, adopt series capacitance to discharge and recharge to cell, switching by switch, improve each quantity that shifts energy, shorten each balanced time, before each battery balanced, at first give the charging of auxiliary charging electric capacity, its magnitude of voltage is the battery pack average voltage, shift the electric capacity charging to energy then, be full of electricity back and disconnect with cell, again with the auxiliary charging capacitances in series, so each energy shifts the energy of electric capacity can big as far as possible transfer; Energy shifts capacitance can be divided into what, poor to adapt to different cells; Auxiliary charging electric capacity can adopt two capacitances in series, to reduce high voltage to the impact of cell; Can design corresponding control chip by this technological transformation, finish becoming effective control of Battery pack; Concrete structure is that anodal balanced selector switch, energy shift electric capacity negative pole selector switch by the balanced selector switch of negative pole, auxiliary charging electric capacity, and energy shifts electric capacity, tandem tap, auxiliary charging electric capacity selector switch is partly formed.
For achieving the above object, the present invention adopts following technical measures:
A kind of battery for electric automobile group novel capacitor equalization methods, when needs are battery balanced, divide energy to shift electric capacity charging and the two kinds of situations of discharging, when energy shifts electric capacity 8 chargings, earlier auxiliary charging electric capacity 7 full charges, be specially and engage auxiliary charging electric capacity selector switch 10, the balanced selector switch 4 of negative pole and anodal balanced selector switch 5, disconnect energy and shift electric capacity negative pole selector switch 6 and tandem tap 9; When shifting electric capacity 8 chargings to energy, engage the balanced selector switch 4 of negative pole, anodal balanced selector switch 5 and energy and shift electric capacity negative pole selector switch 6, disconnect auxiliary charging electric capacity selector switch 10 and tandem tap 9; When energy shifts electric capacity 8 discharges, engage the balanced selector switch 4 of negative pole, anodal balanced selector switch 5 and tandem tap 9, disconnect energy and shift electric capacity negative pole selector switch 6 and auxiliary charging electric capacity selector switch 10; For satisfying the voltage difference that changes between the different monomers battery, add auxiliary energy and shifted control capacittance 12 and auxiliary energy transfer control capacittance switch 13, connect auxiliary energy and shift control capacittance switch 13 when the transfer energy requirement is big, the increase energy shifts the energy value that electric capacity 8 once can shift; Also can be divided into two electric capacity to auxiliary charging electric capacity 7 as required, namely auxiliary electric capacity 11 and the auxiliary electric capacity 14 down gone up is connected auxiliary capacitor earthed switch 15 when energy shifts electric capacity 8 discharges, when charging to reduce the impact to cell.
This method specifically may further comprise the steps:
1) when the needs battery pack balancing, mains switch 2 disconnects, at first give auxiliary charging electric capacity 7 chargings, move to engaging auxiliary charging electric capacity selector switch 10, the balanced selector switch 4 of negative pole and anodal balanced selector switch 5, disconnect energy and shift electric capacity negative pole selector switch 6 and tandem tap 9;
2) behind auxiliary charging electric capacity 7 full charges, shift electric capacity 8 chargings to energy, switch motion disconnects auxiliary charging electric capacity selector switch 10 and tandem tap 9 for the balanced selector switch 4 of the negative pole that engages corresponding cell, anodal balanced selector switch 5 and energy shift electric capacity negative pole selector switch 6;
3) when energy shifts electric capacity 8 discharges, disconnect energy and shift electric capacity negative pole selector switch 6 and auxiliary charging electric capacity selector switch 10, engage the balanced selector switch 4 of negative pole, anodal balanced selector switch 5 and tandem tap 9;
4) for satisfying the voltage difference that changes between the different monomers battery, add auxiliary energy and shifted control capacittance 12 and auxiliary energy transfer control capacittance switch 13, connect auxiliary energy and shift control capacittance switch 13 when the transfer energy requirement is big, the increase energy shifts the energy value that electric capacity 8 once can shift;
5) also can be divided into two electric capacity to auxiliary charging electric capacity 7 as required, namely auxiliary electric capacity 11 and the auxiliary electric capacity 14 down gone up is connected auxiliary capacitor earthed switch 15 when energy shifts electric capacity 8 discharges, when charging to reduce the impact to cell.
A kind of battery for electric automobile group novel capacitor equalization methods is to take following scheme to realize: a kind of battery for electric automobile group novel capacitor equalization methods concrete structure is by the balanced selector switch of negative pole, anodal balanced selector switch, energy shifts electric capacity negative pole selector switch, auxiliary charging electric capacity, energy shifts electric capacity, tandem tap, auxiliary charging electric capacity selector switch is partly formed; It is characterized in that charge power supply (1) connects mains switch (2) and links to each other with battery pack, batteries monomer battery (3) (or super capacitor group monomer electric capacity (3)) negative pole connects an end of the balanced selector switch of negative pole (4), the anodal end that connects anodal balanced selector switch (5) of described batteries monomer battery (3), the other end of the balanced selector switch of described negative pole (4) connects the end that energy shifts electric capacity negative pole selector switch (6), described energy shifts electric capacity negative pole selector switch (6) other end and connects the negative pole that energy shifts electric capacity (8), the other end of the balanced selector switch of described positive pole (5) connects the positive pole that described energy shifts electric capacity (8), the negative pole of described energy transfer electric capacity (8) connects an end of tandem tap (9) simultaneously, the other end of described tandem tap (9) is connected with the positive pole of auxiliary charging electric capacity (7), described auxiliary charging electric capacity (7) shifts electric capacity negative pole selector switch (6) other end with described energy and is connected, be that described energy shifts electric capacity negative pole selector switch (6) and described auxiliary charging electric capacity (7), described tandem tap (9) parallel connection, one end of auxiliary charging electric capacity selector switch (10) connects the positive pole that described energy shifts electric capacity (8), and the other end of described auxiliary charging electric capacity selector switch (10) connects the positive pole of described auxiliary charging electric capacity (7); Cause the difference that shifts energy for satisfying the voltage difference that changes between the balanced different monomers battery, the end that auxiliary energy shifts control capacittance switch (13) connects the positive pole that described energy shifts electric capacity (8), the other end that described auxiliary energy shifts control capacittance switch (13) connects the positive pole that auxiliary energy shifts control capacittance (12), and the negative pole that described auxiliary energy shifts control capacittance (12) connects the negative pole that described energy shifts electric capacity (8); For reducing the impact to cell, the voltage that applies when suitably reducing equilibrium, described auxiliary charging electric capacity (7) is set to auxiliary electric capacity (11) and the auxiliary electric capacity (14) down gone up, the described auxiliary positive pole of going up electric capacity (11) connects the negative pole that described energy shifts electric capacity (8), the described auxiliary negative pole of going up electric capacity (11) connects the described auxiliary positive pole of electric capacity (14) down, the described auxiliary negative pole of electric capacity (14) down connects described energy and shifts electric capacity negative pole selector switch (6) other end, the described auxiliary negative pole of going up electric capacity (11) connects auxiliary capacitor earthed switch (15), and described negative pole connects the described energy of auxiliary capacitor earthed switch (15) connection and shifts electric capacity negative pole selector switch (6) other end.
The present invention's " a kind of battery for electric automobile group novel capacitor equalization methods " is the combining structure that energy shifts electric capacity and auxiliary charging electric capacity, through well-designed back a kind of battery pack balancing method is proposed, be applicable to fields such as various electric automobiles, Hybrid Vehicle battery pack or super capacitor group, can effectively shorten battery pack or capacitance group time for balance.
The characteristics of a kind of battery for electric automobile group of the present invention novel capacitor equalization methods:
1, the present invention adopts energy to shift the way of electric capacity and auxiliary charging capacitances in series, and reaching each can most ofly shift the energy that energy shifts capacitance stores, makes the efficient that shifts energy improve greatly, has shortened the time of battery pack balancing; And only adopted 1 energy to shift electric capacity originally, and little to the voltage difference between the low-yield battery of monomer of the high-energy cell of its charging and its discharge, so the energy of each transfer is very little, cause that time for balance is longer;
2, be divided into the different capabilities rank by energy is shifted electric capacity, adapted to the complex situations of capacity volume variance between cell, the faster battery pack balancing state that reaches of energy;
3, the present invention is divided into two electric capacity of series connection to auxiliary charging electric capacity, can be fit to the needs of low capacity cell, when being reduced in battery pack balancing to the impact of battery;
4, the present invention has added more control switch, and these switches by special control chip control, make that the peripheral components of battery pack balancing system is few after adopting electronic switch, be fit to embedded system control;
5, shift the energy of electric capacity owing to can effectively release energy, so can adopt the little electric capacity of capacitance, reduced system cost and system bulk.
What the present invention relates to is a kind of battery for electric automobile group novel capacitor equalization methods, be to adopt energy to shift the combining structure of electric capacity and auxiliary charging electric capacity, additional corresponding control switch, shift the uneven energy between battery cell when realizing battery pack balancing fast, prolong the useful life and the service behaviour of improving battery pack of battery pack, be applicable to that various electric automobiles, Hybrid Vehicle battery pack etc. are made battery pack or the capacitance group equilibrium is used, be particularly suitable for pure electric automobile and use.
Description of drawings
The invention will be further described below with reference to accompanying drawing.
Accompanying drawing 1～accompanying drawing 2 is a kind of battery for electric automobile group novel capacitor equalization methods embodiments, and actual use the of the present invention is not limited to embodiment.
Embodiment
With reference to accompanying drawing 1～accompanying drawing 2, a kind of battery for electric automobile group novel capacitor equalization methods architectural feature is (as accompanying drawing 1～accompanying drawing 2): when battery pack balancing, adopt the lithium battery group as control object, its voltage range is 2.7V-4.2V, the parameter that energy shifts electric capacity 8 is 47 μ F/10V, auxiliary charging electric capacity 7 parameters are 47 μ F/10V, and all switches all adopt metal-oxide-semiconductor, make that the control energy is very little; Satisfying the voltage difference that changes between the different monomers battery, the parameter that additional auxiliary energy shifts control capacittance 12 is 22 μ F/10V, and namely the auxiliary electric capacity 11 of going up is 47 μ F/10V with the auxiliary parameter of electric capacity 14 down.
Claims (3)
1. battery for electric automobile group novel capacitor equalization methods, circuit structure with fast uniform battery pack or super capacitor group, it is characterized in that structure is an end that is connected the balanced selector switch of negative pole (4) by batteries monomer battery (3) negative pole, the anodal end that connects anodal balanced selector switch (5) of described batteries monomer battery (3), the other end of the balanced selector switch of described negative pole (4) connects the end that energy shifts electric capacity negative pole selector switch (6), described energy shifts electric capacity negative pole selector switch (6) other end and connects the negative pole that energy shifts electric capacity (8), the other end of the balanced selector switch of described positive pole (5) connects the positive pole that described energy shifts electric capacity (8), the negative pole of described energy transfer electric capacity (8) connects an end of tandem tap (9) simultaneously, the other end of described tandem tap (9) is connected with the positive pole of auxiliary charging electric capacity (7), described auxiliary charging electric capacity (7) shifts electric capacity negative pole selector switch (6) other end with described energy and is connected, be that described energy shifts electric capacity negative pole selector switch (6) and described auxiliary charging electric capacity (7), described tandem tap (9) parallel connection, one end of auxiliary charging electric capacity selector switch (10) connects the positive pole that described energy shifts electric capacity (8), and the other end of described auxiliary charging electric capacity selector switch (10) connects the positive pole of described auxiliary charging electric capacity (7).
2. a kind of battery for electric automobile group novel capacitor equalization methods according to claim 1, it is characterized in that: the end that auxiliary energy shifts control capacittance switch (13) connects the positive pole that described energy shifts electric capacity (8), the other end that described auxiliary energy shifts control capacittance switch (13) connects the positive pole that auxiliary energy shifts control capacittance (12), and the negative pole that described auxiliary energy shifts control capacittance (12) connects the negative pole that described energy shifts electric capacity (8).
3. a kind of battery for electric automobile group novel capacitor equalization methods according to claim 1, it is characterized in that: described auxiliary charging electric capacity (7) is divided into auxiliary electric capacity (11) and the auxiliary electric capacity (14) down gone up, the described auxiliary positive pole of going up electric capacity (11) connects the negative pole that described energy shifts electric capacity (8), the described auxiliary negative pole of going up electric capacity (11) connects the described auxiliary positive pole of electric capacity (14) down, the described auxiliary negative pole of electric capacity (14) down connects described energy and shifts electric capacity negative pole selector switch (6) other end, the described auxiliary negative pole of going up electric capacity (11) connects an end of auxiliary capacitor earthed switch (15), and the other end that described negative pole connects auxiliary capacitor earthed switch (15) connects described energy transfer electric capacity negative pole selector switch (6) other end.
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| CN2012105638537A CN103187754A (en) | 2012-12-24 | 2012-12-24 | Novel capacitance balancing method of battery pack for electric car |
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| CN2012105638537A CN103187754A (en) | 2012-12-24 | 2012-12-24 | Novel capacitance balancing method of battery pack for electric car |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110850A (en) * | 2018-01-12 | 2018-06-01 | 青岛大学 | A kind of isolated battery group system of series load and control method |
| CN111490572A (en) * | 2020-04-22 | 2020-08-04 | 杭州元色科技有限公司 | Equalizing device and method adopting voltage-multiplying switch energy storage element and battery management system |
| CN111976538A (en) * | 2019-12-27 | 2020-11-24 | 中北大学 | Equalizing structure and equalizing method of vehicle-mounted composite power supply system |
| CN112350407A (en) * | 2020-11-08 | 2021-02-09 | 马东林 | Voltage-sharing circuit of battery pack and control method thereof |
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| CN85100641A (en) * | 1985-04-01 | 1986-07-16 | 周仕元 | Capacitive power supply |
| US5821007A (en) * | 1996-08-19 | 1998-10-13 | Motorola, Inc. | Power source for an electrical device |
| CN201063444Y (en) * | 2007-07-04 | 2008-05-21 | 福州高贝嵌入式技术有限公司 | Total charging circuit of secondary battery pack |
| CN101677189A (en) * | 2008-09-18 | 2010-03-24 | 光宝科技股份有限公司 | Power source balance module and method thereof and power source module |
| CN202206153U (en) * | 2011-08-25 | 2012-04-25 | 上海新进芯微电子有限公司 | Battery module balance circuit |
-
2012
- 2012-12-24 CN CN2012105638537A patent/CN103187754A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100641A (en) * | 1985-04-01 | 1986-07-16 | 周仕元 | Capacitive power supply |
| US5821007A (en) * | 1996-08-19 | 1998-10-13 | Motorola, Inc. | Power source for an electrical device |
| CN201063444Y (en) * | 2007-07-04 | 2008-05-21 | 福州高贝嵌入式技术有限公司 | Total charging circuit of secondary battery pack |
| CN101677189A (en) * | 2008-09-18 | 2010-03-24 | 光宝科技股份有限公司 | Power source balance module and method thereof and power source module |
| CN202206153U (en) * | 2011-08-25 | 2012-04-25 | 上海新进芯微电子有限公司 | Battery module balance circuit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110850A (en) * | 2018-01-12 | 2018-06-01 | 青岛大学 | A kind of isolated battery group system of series load and control method |
| CN111976538A (en) * | 2019-12-27 | 2020-11-24 | 中北大学 | Equalizing structure and equalizing method of vehicle-mounted composite power supply system |
| CN111490572A (en) * | 2020-04-22 | 2020-08-04 | 杭州元色科技有限公司 | Equalizing device and method adopting voltage-multiplying switch energy storage element and battery management system |
| CN111490572B (en) * | 2020-04-22 | 2021-09-28 | 杭州元色科技有限公司 | Equalizing device and method adopting voltage-multiplying switch energy storage element and battery management system |
| WO2021213368A1 (en) * | 2020-04-22 | 2021-10-28 | 杭州元色科技有限公司 | Equalization apparatus utilizing voltage multiplying switch energy storage element, method, and battery management system |
| CN112350407A (en) * | 2020-11-08 | 2021-02-09 | 马东林 | Voltage-sharing circuit of battery pack and control method thereof |
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Application publication date: 20130703 |