CN103219767A - Device and method for automatically adjusting charging and discharging of battery pack - Google Patents

Device and method for automatically adjusting charging and discharging of battery pack Download PDF

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CN103219767A
CN103219767A CN2013101214499A CN201310121449A CN103219767A CN 103219767 A CN103219767 A CN 103219767A CN 2013101214499 A CN2013101214499 A CN 2013101214499A CN 201310121449 A CN201310121449 A CN 201310121449A CN 103219767 A CN103219767 A CN 103219767A
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battery pack
battery
cell
sigma
external loading
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慈松
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Abstract

The invention provides a technical scheme of a device and a method for automatically adjusting charging and discharging of a battery pack. In the scheme, the device comprises a plurality of single batteries, a controllable switch array connected with the single batteries and a configuration processor for controlling the switch array, wherein the configuration processor is used for measuring the residual power of the single batteries in the battery pack, loading an external load for the battery pack by controlling the switch array, configuring the battery pack according to the external load and supplying power to the external load after determining the connection relation of the single batteries. In the scheme, the connection relation of the battery pack can be adjusted in time according to the external load, so that the optimal battery configuration is realized and the cruise duration of the battery pack is prolonged.

Description

The device and method that automatic regulating cell group discharges and recharges
The application is that application number is 201010593068.7 divides an application.
Technical field
What the present invention relates to is a kind of battery system, the device and method that especially a kind of automatic regulating cell group discharges and recharges.
Background technology
Each charging cruising time and useful life are one of most important performance parameters of battery pack system.The system of use multi cell battery group comprises the communication network device of various suitable standby battery groups, electric automobile and hybrid vehicle, regenerative resource memory device, and other all use battery supply sets.Battery energy storage system has crucial effects to the utilization of regenerative resource.In addition, under some crucial task scenes, as emergency relief, law enforcement, fire-fighting and battlefield, the battery life an of the best can be saved more life.In addition, annual all have millions of various chargeable multi cell battery groups owing to the otherness and the unreasonable battery pack that causes of existing system design of battery self go out of use, this has not only caused because of handling the great expense incurred that these batteries produce, and has brought the misgivings of environmental problem simultaneously.Therefore, there are far reaching significance in the cruising time and the life-span of raising battery to socio-economic development.
Summary of the invention
Purpose of the present invention is exactly at the existing in prior technology deficiency, and provide the technical scheme of the device and method that a kind of automatic regulating cell group discharges and recharges, this scheme can be according to the load of outside, adjust the annexation of battery pack timely, realize optimum cell arrangement, improve the cruising time of battery pack.
This programme is realized by following technical measures: the device that a kind of automatic regulating cell group discharges and recharges, the characteristics of this programme are: comprise a plurality of cells, but the switch arrays in modern age that are connected with cell also have a configuration processor with the control switch array.
Configuration processor is measured the dump energy of battery in the battery pack earlier,
Load external loading to battery pack,
Configuration processor is according to external loading setting battery group,
If the electric weight that external loading need or provide satisfies,
RC scries ( i 1 , i 2 , . . . i n , v 1 , v 2 . . . v n ) = Σ j = 1 n RC j ( i j , v ′ j ) , - - - ( 1 )
Then with n cell configured in series, RC in the formula j(i j, v ' j) be the dump energy of j cell, v ' jBe the charging/discharging voltage of each cell, to a cell, if different current i LjAnd i 2jElectrode voltage v 1jAnd v 2jBe known, so discharging current i when moment t, the charging/discharging voltage v ' of each battery jCan calculate by following formula
v ′ j = v 2 j - v 1 j i 2 j - i 1 j i + v 2 j - - - ( 2 )
RC j ( i j . v ′ j ) = { 1 - exp ( r nj · I - ( v ini - v cutoff ) λ ) b 1 j } 1 b 2 j - { 1 - exp ( r nj · I - ( v ini - v ′ j ) λ ) b 1 j } 1 b 2 j - - - ( 3 )
Then RC scries ( i 1 , i 2 , . . . i n , v 1 , v 2 . . . v n )
= Σ j = 1 n { 1 - exp ( v nj · I - ( v ini - v cutoff ) λ ) b 1 j } 1 b 2 j - { 1 - exp [ r nj · I - ( v ini - v 2 j - v 1 j i 2 j - i 1 j i - v ) λ ] b 1 j } 1 b 2 j - - - ( 4 )
If the electric weight that external loading need or provide satisfies
RC parallel ( i 1 , i 2 , . . . i n , v 1 , v 2 . . . v n ) = Σ j = 1 n RC j ( i j , v ′ j ) , - - - ( 5 )
Then with n cell configured in series, RC in the formula j(i j, v ' j) be the dump energy of j cell, v ' jBe the charging/discharging voltage of each cell, to a cell, if know different current i 1pAnd i 2pElectrode voltage v 1pAnd v 2p, and batteries in parallel connection charging/discharging voltage v Parallel, discharging current i is at the electric current of moment t so
i = i 2 p - i 1 p v 1 p - v 2 p v parallel - - - ( 6 )
In formula (6) substitution formula (2), just can obtain v ' j, in the substitution (5) then
RC parallel ( i 1 , i 2 , . . . i n , v 1 , v 2 . . . v n ) =
Σ j = 1 n { 1 - exp ( r nj · I - ( v ini - v cutoff ) λ ) b 1 j } 1 b 2 j - { 1 - exp [ r nj · I - ( V ini - v 21 - v 1 j i 2 j - i 1 j * i 2 p - i 1 p v 1 p - v 2 p v parallel - v ) λ ] b 1 j } 1 b 2 j - - - ( 7 )
Then with the configuration in parallel of n cell, RC in the formula j(i j, v ' j) be the dump energy of j battery; If the electric weight that external loading need or provide satisfies
RC s , s - p = RC s - p ( i 11 , i 12 , . . . i nm , v 11 , v 12 , . . . v nm ) + RC series ( i 1 , i 2 , . . . i n , v 1 , v 1 , . . . v n ) =
Σ i = 1 n Σ j = 1 m RC ij ( i ij , v ′ ij ) + Σ k = 1 p RC k ( i k , v ′ k ) = Σ i = 1 n m * RC ( i m , v i ) + Σ k = 1 p RC k ( i , v k ) - - - ( 8 )
After then m being organized n battery pack parallel connection, again with p battery series connection.In the above-mentioned formula
1.
Figure BDA00003026809800044
F is Faraday constant 96485Cmol -1R is a gas constant, is 8.3144JK -1Mol -1N is the electron number that transmits.T is a temperature.
v IniBe initial voltage, v CotoffIt is cut-ff voltage.
2.r computing formula be
r(i,T,n c,T)=r o(i,T)+r f(n c,T),
In above-mentioned formula, r o(i, T) resistance overpotential and surperficial superpotential effect during battery discharge procedure, and can express by following equation
r o ( i , T ) = a 1 ( T ) + a 2 ( T ) ln i i + a 3 ( T ) i
Wherein
a 1 ( T ) = A ( 0 ) k ∫ O L dx A ( x ) = a 11 · exp ( a 12 T ) + a 13
A (x) is the cross-section region apart from the x place at the distance negative pole, and L is two distance between electrodes.
a 2 ( T ) = RT F ( 1 α a + α c ) = α 21 T + α 22
a aAnd a cBe respectively the carry-over factor of anode and negative pole,
a 3 ( T ) = RT F ( ln i o , a α a + ln i o , c α c ) = a 31 T 2 + a 32 T = a 33
i 0, aAnd i 0, cBe respectively the exchange power density at anode and negative pole place;
r f ( n c , T ′ ) = k · n c · exp ( - e T ′ + φ )
n cBe to discharge and recharge periodicity.T ' is the temperature in previous cycle.K is a constant, e=Ea, and φ=(Ea)/(T ' ref), Ea enlivens energy.
3. the b in the above-mentioned formula can be calculated b by following formula 1(I, T) and b 2(I, T) relevant with battery the inside electrolytical change in concentration during discharge process, and can calculate by following equation.
b 1 ( i , T ) = d 11 exp ( d 12 T ) + d 13
b 2 ( i , T ) = ( d 21 T + d 22 ) + d 23
Wherein
Figure BDA00003026809800057
J=1,2, k=1,2,3 and m (d Jk) be the coefficient of fixing.
The beneficial effect of this programme can be learnt according to the narration to such scheme, because configuration processor can be adjusted the annexation of battery pack timely in this scheme, make when no matter battery pack is charging or discharge, can both realize optimum configuration, the longest service time that can realize battery pack.This shows that the present invention compared with prior art has outstanding substantive distinguishing features and obvious improvement, the beneficial effect of its enforcement also is conspicuous.
Description of drawings
Fig. 1 is the structural representation of the specific embodiment of the invention.
Fig. 2 is a setting battery group flow chart of the present invention.
Among the figure, 1 is cell, and 2 is controllable switching array, and 3 is configuration processor.
Embodiment
For clearly demonstrating the technical characterstic of this programme, below by an embodiment, and in conjunction with its accompanying drawing, the device and method that the automatic regulating cell group of this programme discharges and recharges is set forth.
By accompanying drawing as can be seen, the device of this programme comprises a plurality of cells 1, and the controllable switching array 2 that is connected with cell 1 also has a configuration processor 3 with control switch array 2.
Configuration processor 3 is measured the dump energy of cell 1 in the battery pack earlier, load external loading by control switch array 2 to battery pack then, configuration processor 3 is according to external loading setting battery group, after determining the annexation of cell 1, to the external loading power supply or to a plurality of cells 1 chargings.
The present invention is not limited in above-mentioned embodiment, and the variation that those of ordinary skills make in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.

Claims (1)

1. method that automatic regulating cell group discharges and recharges is characterized in that: use the device of this method to comprise a plurality of cells, the controllable switching array that is connected with cell also has a configuration processor with the control switch array, and concrete method is:
One group of cell with both positive and negative polarity is provided,
Configuration processor is measured the dump energy of cell,
Load external loading to battery pack,
Configuration processor is according to external loading setting battery group,
If the electric weight that external loading need or provide satisfies
Figure FDA00003026809700011
Figure FDA00003026809700012
Then with n cell configured in series, RC in the formula j(i j, v ' j) be the dump energy of j cell; If the electric weight that external loading need or provide satisfies RC parallel ( i 1 , i 2 , . . . i n , v 1 , v 2 , . . . v n ) = Σ j = 1 n RC j ( i j , v ′ j ) , Then with the configuration in parallel of n cell, RC in the formula j(i j, v ' j) be the first dump energy of j battery;
If the electric weight that external loading need or provide satisfies
RC s , s - p = RC s - p ( i 11 , i 12 , . . . i nm , v 11 , v 12 , . . . v nm ) + RC series ( i 1 , i 2 , . . . i n , v 1 , v 1 , . . . v n ) =
Σ i = 1 n Σ j = 1 m RC ij ( i ij , v ′ ij ) + Σ k = 1 p RC k ( i k , v ′ k ) = Σ i = 1 n m * RC ( i m , v i ) + Σ k = 1 p RC k ( i , v k ) ,
After then m being organized the parallel connection of n battery series battery, again with p battery series connection.
CN2013101214499A 2010-12-17 2010-12-17 Device and method for automatically adjusting charging and discharging of battery pack Pending CN103219767A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107171387A (en) * 2017-06-07 2017-09-15 国网山东省电力公司 It is a kind of can dynamic restructuring battery energy storage system and method
CN115360798A (en) * 2022-10-19 2022-11-18 中安芯界控股集团有限公司 Online balancing method for battery clusters in battery energy storage system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101359837A (en) * 2008-09-19 2009-02-04 哈尔滨工业大学 Charging discharging fast equalizing apparatus for accumulator set or capacitor set

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101359837A (en) * 2008-09-19 2009-02-04 哈尔滨工业大学 Charging discharging fast equalizing apparatus for accumulator set or capacitor set

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SONG CI ; JIUCAI ZHANG ; SHARIF, H. ; ALAHMAD, M.: "A Novel Design of Adaptive Reconfigurable Multicell Battery for Power-Aware Embedded Networked Sensing Systems", 《GLOBAL TELECOMMUNICATIONS CONFERENCE, 2007. GLOBECOM "07. IEEE 》, 31 December 2007 (2007-12-31), pages 1043 - 1047 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107171387A (en) * 2017-06-07 2017-09-15 国网山东省电力公司 It is a kind of can dynamic restructuring battery energy storage system and method
CN115360798A (en) * 2022-10-19 2022-11-18 中安芯界控股集团有限公司 Online balancing method for battery clusters in battery energy storage system
CN115360798B (en) * 2022-10-19 2023-02-28 中安芯界控股集团有限公司 Online balancing method for battery clusters in battery energy storage system

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Application publication date: 20130724