CN100426620C - Resistance calibrating method for lithium charge cell equalizing circuit - Google Patents
Resistance calibrating method for lithium charge cell equalizing circuit Download PDFInfo
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- CN100426620C CN100426620C CNB2005100385838A CN200510038583A CN100426620C CN 100426620 C CN100426620 C CN 100426620C CN B2005100385838 A CNB2005100385838 A CN B2005100385838A CN 200510038583 A CN200510038583 A CN 200510038583A CN 100426620 C CN100426620 C CN 100426620C
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- 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
Abstract
The present invention a resistance calibration method for an equalization circuit of a lithium charging battery, which is characterized in that a group of reference voltage corresponding to lithium charging batteries connected in series is provided, a calibration software prearranged in the equalization circuit is utilized to control a sampling circuit in the equalization circuit to sample, and voltage values of the corresponding nodes are respectively measured. Compared with the value of the reference voltage, the calibration parameter of each voltage division resistor is obtained, the group of calibration parameters are stored, and the resistance is calibrated by utilizing the calibration parameters when the equalization circuit collects the voltage. An ordinary resistor is used as a sampling voltage division resistor of the equalization circuit of the lithium charging battery by adopting the technical scheme of the present invention to calibrate, and thereby, the cost of the product is reduced, and the workload is greatly reduced in the process of maintenance.
Description
Technical field
The present invention relates to a kind of resistance calibrating method, the divider resistance group that is specifically related to a kind of sample circuit of the equalizing circuit that is used for lithium rechargeable batteries that series connection is used is carried out Calibration Method.
Background technology
Lithium rechargeable batteries is owing to have advantages such as in light weight, that volume is little, capacitance is big, charging rate is very fast, is widely used on all kinds of numbers, the communication product such as notebook computer.Present common cobalt acid lithium battery, the voltage maximum can not be above 4.3 volts, when surpassing 4.3 volts, very likely produce blast, on fire, the phenomenon of smoldering, because the difference between the battery, during the multiple batteries series connection, can produce unbalanced phenomena, make each batteries voltage difference, when being connected in series for seven, eight, ten batteries, unbalanced problem is just more outstanding.Therefore, abroad, for the sake of security, the connection of regulation cobalt acid lithium battery does not allow to surpass more than four joints, thereby has limited the range of application of lithium rechargeable batteries.
Lithium manganate battery is the emphasis of people's research and development in recent years, its security performance is better, can carry out the series connection of multiple batteries uses, yet, because still there is certain difference in the restriction of process conditions between the monomer electricity core, though can solve by the method for combo, but after repeatedly circulating, still can there be bigger voltage difference between the battery, influences battery serviceability and life-span.Address this problem, the height consistency that relies on battery simply is extremely to expend cost.
Be directed to this, the applicant has proposed the equalizing circuit that a kind of lithium rechargeable batteries discharges and recharges in another application, the lithium rechargeable batteries that respectively saves to series connection carries out voltage sample, and according to the rule that sets in advance, lithium rechargeable batteries to overtension discharges, and makes the battery of series connection lithium rechargeable batteries obtain equilibrium.In this scheme, need carry out battery voltage sampling, for simplifying sample circuit, adopted a component piezoresistance, with the correspondence anode voltage dividing potential drop over the ground of sampling, when making each the measurement, the range of voltage sensor is close, improves certainty of measurement.In this process, the resistance accuracy of divider resistance will influence actual measured value.
In measuring instrument, adopt the mode of choosing precision resistance to improve certainty of measurement to resistor network, but because lithium charge cell equalizing circuit need be configured in the lithium rechargeable batteries of each group series connection use, adopt the precision resistance cost too high, and the employing conventional, electric-resistance, there is certain difference in the resistance of resistance, matches to select on the one hand that workload is big, on the other hand, in the maintenance after the use, detection, all have difficulties.Therefore, if utilize conventional, electric-resistance to improve voltage dividing potential drop certainty of measurement, be urgent problem when reducing the lithium charge cell equalizing circuit cost.
Summary of the invention
The object of the invention provides a kind of resistance calibrating method that is used for lithium charge cell equalizing circuit, thereby can use conventional, electric-resistance as divider resistance, the precision that needs when reaching voltage sample.
For achieving the above object, the technical solution used in the present invention is: a kind of resistance calibrating method that is used for lithium charge cell equalizing circuit, one group of reference voltage corresponding to the series connection lithium rechargeable batteries is provided, utilize the sample circuit in the calibration software control equalizing circuit of inserting in advance in the equalizing circuit to sample, measure the magnitude of voltage of each corresponding node respectively, compare with reference voltage value, obtain the correction parameter of each divider resistance, store this group correction parameter, when equalizing circuit is gathered voltage, utilize correction parameter to proofread and correct.
Further technical scheme, described one group of reference voltage is provided by the voltage reference plate, and each the corresponding voltage point on the voltage reference plate is connected to lithium rechargeable batteries electrode incoming end corresponding in the equalizing circuit.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1. because the present invention utilizes the sampling function of the equalizing circuit one group of reference voltage of having sampled respectively, thereby can utilize the resistance of calculation correction divider resistance, guarantee the accuracy of voltage sample;
2. adopt technical scheme of the present invention to proofread and correct, can use the sampling divider resistance of conventional, electric-resistance, thereby reduce product cost as lithium charge cell equalizing circuit;
3. owing in the control circuit of equalizing circuit, be provided with calibration software, keep in repair at equalizing circuit, when detecting, only need provide the reference voltage plate, can proofread and correct again the circuit that overhauled, guarantee the operate as normal of equalizing circuit, thereby greatly reduce the workload when overhauling.
Description of drawings
Accompanying drawing 1 is the voltage sample part-structure schematic diagram of equalizing circuit.
Embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment one: a kind of resistance calibrating method that is used for lithium charge cell equalizing circuit, one group of reference voltage corresponding to the series connection lithium rechargeable batteries is provided, utilize the sample circuit in the calibration software control equalizing circuit of inserting in advance in the equalizing circuit to sample, measure the magnitude of voltage of each corresponding node respectively, compare with reference voltage value, obtain the correction parameter of each divider resistance, store this group correction parameter, when equalizing circuit is gathered voltage, utilize correction parameter to proofread and correct.
In the present embodiment, described one group of reference voltage is provided by the voltage reference plate, and each the corresponding voltage point on the voltage reference plate is connected to lithium rechargeable batteries electrode incoming end corresponding in the equalizing circuit.
Claims (2)
1. resistance calibrating method that is used for lithium charge cell equalizing circuit, it is characterized in that: one group of reference voltage corresponding to the series connection lithium rechargeable batteries is provided, utilize the sample circuit in the calibration software control equalizing circuit of inserting in advance in the equalizing circuit to sample, measure the magnitude of voltage of each corresponding node respectively, compare with reference voltage value, obtain the correction parameter of each divider resistance, the correction parameter of described each divider resistance of storage utilizes correction parameter to proofread and correct when equalizing circuit is gathered voltage.
2. the resistance calibrating method that is used for lithium charge cell equalizing circuit according to claim 1, it is characterized in that: described one group of reference voltage is provided by the voltage reference plate, and each the corresponding voltage point on the voltage reference plate is connected to lithium rechargeable batteries electrode incoming end corresponding in the equalizing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100385838A CN100426620C (en) | 2005-03-25 | 2005-03-25 | Resistance calibrating method for lithium charge cell equalizing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100385838A CN100426620C (en) | 2005-03-25 | 2005-03-25 | Resistance calibrating method for lithium charge cell equalizing circuit |
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| Publication Number | Publication Date |
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| CN1688074A CN1688074A (en) | 2005-10-26 |
| CN100426620C true CN100426620C (en) | 2008-10-15 |
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| CNB2005100385838A Active CN100426620C (en) | 2005-03-25 | 2005-03-25 | Resistance calibrating method for lithium charge cell equalizing circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101662051B (en) * | 2008-08-26 | 2011-09-07 | 比亚迪股份有限公司 | Method and device for charging battery pack in an equalizing way |
| CN101938156B (en) * | 2010-09-07 | 2013-05-15 | 惠州Tcl移动通信有限公司 | Charging circuit for use in the calibration and test of mobile terminal and implementation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5352968A (en) * | 1992-05-28 | 1994-10-04 | Apple Computer, Inc. | Battery charge state determination |
| JPH10312829A (en) * | 1997-03-11 | 1998-11-24 | Nippon Soken Inc | Monitor for battery voltage |
| CN1291724A (en) * | 1999-10-07 | 2001-04-18 | 广州擎天实业有限公司电工分公司 | Automatic sampling correction method for voltage of battery |
| CN1367565A (en) * | 2002-01-07 | 2002-09-04 | 北京航空航天大学 | Automatic equalizing charging device for series-connected battery set |
| CN2554813Y (en) * | 2002-06-21 | 2003-06-04 | 骏泰阳软件科技（深圳）有限公司 | Series battery monitoring protective module |
| JP2003274568A (en) * | 2002-03-18 | 2003-09-26 | Shin Kobe Electric Mach Co Ltd | Control circuit |
-
2005
- 2005-03-25 CN CNB2005100385838A patent/CN100426620C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5352968A (en) * | 1992-05-28 | 1994-10-04 | Apple Computer, Inc. | Battery charge state determination |
| JPH10312829A (en) * | 1997-03-11 | 1998-11-24 | Nippon Soken Inc | Monitor for battery voltage |
| CN1291724A (en) * | 1999-10-07 | 2001-04-18 | 广州擎天实业有限公司电工分公司 | Automatic sampling correction method for voltage of battery |
| CN1367565A (en) * | 2002-01-07 | 2002-09-04 | 北京航空航天大学 | Automatic equalizing charging device for series-connected battery set |
| JP2003274568A (en) * | 2002-03-18 | 2003-09-26 | Shin Kobe Electric Mach Co Ltd | Control circuit |
| CN2554813Y (en) * | 2002-06-21 | 2003-06-04 | 骏泰阳软件科技（深圳）有限公司 | Series battery monitoring protective module |
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| CN1688074A (en) | 2005-10-26 |
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Address after: 215153 Suzhou high tech Zone, Jiangsu City, science and technology zone, Jinsha River Road, No. 181 Patentee after: Phylion battery Limited by Share Ltd Address before: 215011 Xiangyang Road, New District, Jiangsu, Suzhou, No. 81 Patentee before: Suzhou Phylion Battery Co., Ltd. |
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