CN203504205U - Self-discharge equalization circuit of lithium ion storage battery - Google Patents
Self-discharge equalization circuit of lithium ion storage battery Download PDFInfo
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- CN203504205U CN203504205U CN201320348008.8U CN201320348008U CN203504205U CN 203504205 U CN203504205 U CN 203504205U CN 201320348008 U CN201320348008 U CN 201320348008U CN 203504205 U CN203504205 U CN 203504205U
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Abstract
The utility model relates to a self-discharge equalization circuit of a lithium ion storage battery. The circuit comprises a plurality of lithium ion cells which are in series connection to form a battery, a voltage sampling network equivalent resistor and a voltage sampling module are in series connection between the anode of each lithium ion cell and a single-chip microcomputer processing module storing work program, and a power equalization resistor and an equalization switch in series with the power equalization resistor are in parallel between the anode and cathode of each cell. The circuit is characterized in that a matching resistor is in parallel with two ends of each cell to enable the self-discharge current of each cell to be consistent. The matching resistor is in parallel between two ends of each cell from the first cell to the last but one, the voltage of each cell in the lithium ion battery is consistent, the self-discharge current of each cell is consistent with the self-discharge current of the last cell, all cells have the same self-discharge current, and the service life of the lithium ion battery is effectively raised.
Description
Technical field
The utility model belongs to lithium-ions battery technical group field, particularly relates to a kind of lithium-ions battery group self discharge equalizing circuit.
Background technology
Lithium-ions battery has that specific energy is high, average discharge volt is high, self discharge is little, memory-less effect, the advantage such as have extended cycle life.In actual applications, mostly a plurality of cells are connected into lithium-ions battery group and carry out work, because lithium-ions battery group is through repeatedly circulating after charge and discharge, make in lithium ion battery group each monomer battery voltage inconsistent.Balanced for guaranteeing each monomer battery voltage of lithium-ions battery group, conventionally on each cell, additionally introduce monomer battery voltage sample circuit, and be parallel with power resistor at each cell two ends, by power ratio control resistance, reach the consistent effect of each monomer battery voltage turn-on time.Owing to additionally having introduced monomer voltage sample circuit, as shown in Figure 1, according to formula: In=I (n-1)+Vc/Rn, make I1 ﹤ I2...In-1 ﹤ In, cause each cell self discharge electric current cannot be consistent, finally affect the useful life of battery pack.
Summary of the invention
The utility model provides between each cell in a kind of lithium ion battery group voltage consistent for solving the technical problem existing in known technology, and the consistent lithium-ions battery group self discharge equalizing circuit of each cell self discharge electric current.
The technical scheme that the utility model adopts is: be characterized in:
Lithium-ions battery group self discharge equalizing circuit, comprise the plural number joint lithium ion single battery that is connected into battery pack, between the single chip processing module that the positive pole of each joint lithium ion single battery and storage have working procedure, be all in series with voltage sample network equivalent resistance and voltage sample module, each joint cell positive and negative end is parallel with equal power resistance and is connected on the ohmically equalizer switch of equal power, is characterized in: cell positive and negative end is parallel with and makes the consistent build-out resistor of each cell self discharge electric current.
The utility model can also adopt following technical scheme:
Described equalizer switch is relay.
Advantage and the good effect that the utlity model has are:
The utility model due to first segment cell to joint cell positive and negative end second from the bottom in parallel respectively build-out resistor, between each cell in lithium ion battery group voltage consistent in, guaranteed that each cell self discharge electric current is all consistent with the self discharge electric current of final section cell, make respectively to save cell self discharge electric current identical, effectively improved the useful life of lithium ion battery group.
Accompanying drawing explanation
Fig. 1 is cell equalizing circuit schematic diagram in traditional lithium ion battery group;
Fig. 2 is the utility model lithium-ions battery group self discharge equalizing circuit schematic diagram.
Fig. 3 is the lithium-ions battery group self discharge equalizing circuit schematic diagram of the utility model embodiment.
Symbol description in figure:
E1: first segment cell
E2: second section cell
E3: the 3rd joint cell
E4: the 4th joint cell
En-1: joint cell second from the bottom
En: final section cell
J1: the equalizer switch of first segment cell
J2: the equalizer switch of second section cell
J3: the equalizer switch of the 3rd joint cell
J4: the equalizer switch of the 4th joint cell
Jn-1: the equalizer switch of joint cell second from the bottom
Jn: the equalizer switch of final section cell
R: equal power resistance
In: cell self discharge electric current
R1: the voltage sample network equivalent resistance of first segment cell
R2: the voltage sample network equivalent resistance of second section cell
R3: the voltage sample network equivalent resistance of the 3rd joint cell
R4: the voltage sample network equivalent resistance of the 4th joint cell
R n-1: the voltage sample network equivalent resistance of joint cell second from the bottom
R n: the voltage sample network equivalent resistance of final section cell
B1: the voltage sample module of first segment cell
B2: the voltage sample module of second section cell
B3: the voltage sample module of the 3rd joint cell
B4: the voltage sample module of the 4th joint cell
Bn-1: the voltage sample module of joint cell second from the bottom
Bn: the voltage sample module of final section cell
A: single chip processing module
Rm1: the build-out resistor of first segment cell
Rm2: the build-out resistor of second section cell
Rm3: the build-out resistor of the 3rd joint cell
Rm (n-1): the build-out resistor of joint cell second from the bottom
Vc: monomer voltage
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing 2 to be described in detail as follows:
Lithium-ions battery group self discharge equalizing circuit, be included in be connected into battery pack from top to bottom for the n joint lithium ion single battery of E1-En (has only drawn first segment cell E1 in Fig. 2, second section cell E2, joint cell En-1 second from the bottom and final section cell En) anodal between the single chip processing module A that has working procedure, be all in series with successively voltage sample network equivalent resistance and voltage sample module (that is: is in series with the voltage sample network equivalent resistance R 1 of first segment cell and the voltage sample module B1 of first segment cell between first segment cell and single chip processing module with being connected to store, the voltage sample network equivalent resistance R 2 of second section cell and the voltage sample module B2 of second section cell, the voltage sample network equivalent resistance R n-1 of joint cell second from the bottom and the voltage sample module Bn-1 of joint cell second from the bottom, the voltage sample network equivalent resistance R n of final section cell and the voltage sample module Bn of final section cell, in Fig. 2, the four joint cell modes that draw in the voltage sample network equivalent resistance of connecting between the cell dispensing between second section cell and joint cell second from the bottom and single chip processing module and voltage sample module and Fig. 2 are identical), each joint cell positive and negative end is parallel with the equal power resistance of serial connection equalizer switch, and (that is: the positive and negative end of first segment cell is parallel with the equal power resistance R of the equalizer switch J1 of serial connection first segment cell, the positive and negative end of second section cell is parallel with the equal power resistance R of the equalizer switch J2 of serial connection second section cell, the positive and negative end of joint cell second from the bottom is parallel with the equal power resistance R of the equalizer switch Jn-1 of serial connection joint cell second from the bottom, the positive and negative end of final section cell is parallel with the equal power resistance R of the equalizer switch Jn of serial connection final section cell, in Fig. 2, the equal power resistance that the cell positive and negative end dispensing between second section cell and joint cell second from the bottom is parallel with serial connection equalizer switch is identical with the four joint cell modes that draw in Fig. 2).
Innovative point of the present utility model is:
Cell positive and negative end is parallel with the build-out resistor that makes each cell self discharge electric current I n consistent, and (that is: the positive and negative end of first segment cell is parallel with the build-out resistor Rm1 that makes the first segment cell self discharge electric current first segment cell consistent with final section cell self discharge electric current, the positive and negative end of second section cell is parallel with the build-out resistor Rm2 that makes the second section cell self discharge electric current second section cell consistent with final section cell self discharge electric current, the positive and negative end of joint cell second from the bottom is parallel with the build-out resistor Rm (n-1) that makes the joint cell self discharge electric current second from the bottom second from the bottom joint cell consistent with final section cell self discharge electric current, in Fig. 2, the build-out resistor of the cell positive and negative end parallel connection dispensing between second section cell and joint cell second from the bottom is identical with the four joint cell modes that draw in Fig. 2).
Innovative point of the present utility model also comprises:
Described equalizer switch is relay.
Embodiment:
As shown in Figure 3, by the lithium-ions battery group being unified into for first segment cell E1, second section cell E2, the 3rd joint cell E3, the 4th joint cell E4 tetra-joint lithium ion single battery strings from top to bottom, its self discharge equalizing circuit comprises:
The positive pole of first segment cell E1 and storage are had between the single chip processing module A of working procedure, connect the voltage sample network equivalent resistance R 1 of first segment cell and the voltage sample module B1 of first segment cell, the voltage sample network equivalent resistance R 2 of second section cell and the voltage sample module B2 of second section cell connect between the positive pole of second section cell E2 and single chip processing module A, the voltage sample network equivalent resistance R 3 and the 3rd of the 3rd joint cell of connecting between the positive pole of the 3rd joint cell E3 and single chip processing module A saves the voltage sample module B3 of cell, the voltage sample network equivalent resistance R 4 and the 4th of the 4th joint cell of connecting between the positive pole of the 4th joint cell E4 and single chip processing module A saves the voltage sample module B4 of cell,
Select relay as equalizer switch, the positive and negative end of first segment cell is parallel with the equal power resistance R of equalizer switch J1 of serial connection first segment cell, the positive and negative end of second section cell is parallel with the equal power resistance R of equalizer switch J2 of serial connection second section cell, the positive and negative end of the 3rd joint cell is parallel with the equal power resistance R of equalizer switch J3 of serial connection the 3rd joint cell, the positive and negative end of the 4th joint cell is parallel with the equal power resistance R of the equalizer switch J4 of serial connection the 4th joint cell;
The monomer voltage Vc of four joint cells is identical, and the 4th joint cell self discharge electric current is In; By the software interpretation in single chip processing module A, the build-out resistor Rm1 at the positive and negative end of first segment cell first segment cell in parallel, makes first segment cell self discharge electric current reach In, identical with the 4th joint cell self discharge electric current; Build-out resistor Rm2 at the positive and negative end of second section cell second section cell in parallel, makes second section cell self discharge electric current reach In, identical with the 4th joint cell self discharge electric current; At the positive and negative end the in parallel the 3rd of the 3rd joint cell, save the build-out resistor Rm3 of cell, make the 3rd joint cell self discharge electric current reach In, identical with the 4th joint cell self discharge electric current; So far, realized and respectively saved cell self discharge current balance state, reached the consistent object of each cell self discharge electric current in lithium ion battery group, the useful life of having improved battery.
Although by reference to the accompanying drawings preferred embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not departing from the scope situation that the utility model aim and claim protect, can also make a lot of forms.Within these structures all belong to protection range of the present utility model.
Claims (2)
1. lithium-ions battery group self discharge equalizing circuit, comprise the plural number joint lithium ion single battery that is connected into battery pack, between the single chip processing module that the positive pole of each joint lithium ion single battery and storage have working procedure, be all in series with voltage sample network equivalent resistance and voltage sample module, each joint cell positive and negative end is parallel with equal power resistance and is connected on the ohmically equalizer switch of equal power, it is characterized in that: cell positive and negative end is parallel with and makes the consistent build-out resistor of each cell self discharge electric current.
2. lithium-ions battery group self discharge equalizing circuit according to claim 1, is characterized in that: described equalizer switch is relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320348008.8U CN203504205U (en) | 2013-06-18 | 2013-06-18 | Self-discharge equalization circuit of lithium ion storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320348008.8U CN203504205U (en) | 2013-06-18 | 2013-06-18 | Self-discharge equalization circuit of lithium ion storage battery |
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| Publication Number | Publication Date |
|---|---|
| CN203504205U true CN203504205U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320348008.8U Expired - Fee Related CN203504205U (en) | 2013-06-18 | 2013-06-18 | Self-discharge equalization circuit of lithium ion storage battery |
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| CN (1) | CN203504205U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492916A (en) * | 2016-07-14 | 2017-12-19 | 宝沃汽车（中国）有限公司 | Battery equalization method and device |
| CN108199439A (en) * | 2018-01-24 | 2018-06-22 | 浙江正电信息科技股份有限公司 | A kind of lithium ion battery balanced device |
| US10797499B2 (en) | 2014-12-17 | 2020-10-06 | SZ DJI Technology Co., Ltd. | Battery management system |
-
2013
- 2013-06-18 CN CN201320348008.8U patent/CN203504205U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10797499B2 (en) | 2014-12-17 | 2020-10-06 | SZ DJI Technology Co., Ltd. | Battery management system |
| US11721995B2 (en) | 2014-12-17 | 2023-08-08 | SZ DJI Technology Co., Ltd. | Battery management system |
| CN107492916A (en) * | 2016-07-14 | 2017-12-19 | 宝沃汽车（中国）有限公司 | Battery equalization method and device |
| CN108199439A (en) * | 2018-01-24 | 2018-06-22 | 浙江正电信息科技股份有限公司 | A kind of lithium ion battery balanced device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20170618 |