CN107607875A - Lithium battery SOH methods of estimation based on cycle-index statistics - Google Patents
Lithium battery SOH methods of estimation based on cycle-index statistics Download PDFInfo
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- CN107607875A CN107607875A CN201710695388.5A CN201710695388A CN107607875A CN 107607875 A CN107607875 A CN 107607875A CN 201710695388 A CN201710695388 A CN 201710695388A CN 107607875 A CN107607875 A CN 107607875A
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Abstract
The invention discloses a kind of lithium battery SOH methods of estimation based on cycle-index statistics, including：S1. the ampere-hour number B of each charge or discharge is recorded, then cycle-index N=B/A*0.5, wherein A is the rated capacity ampere-hour number of battery；S2. the health status SOH of battery=(L ∑ N)/L*100%, wherein L is the nominal cycle number of battery, and ∑ N represents accumulated cycles；Further, the circulation is completely filled with battery, completely puts and be once designated as one cycle；Further, the ampere-hour number to be discharged every time by battery management system software records battery.Beneficial effects of the present invention：1. circulating battery number is calculated by capacity method, it is easy to accomplish, reliability is high；2. because battery is integrally fixed on electric automobile, circulating battery number can be counted by normal discharge and recharge, the method need not dismantle battery bag, and without expensive experimental facilities, reduce cost.
Description
Technical field
The present invention relates to cell art, it particularly relates to which a kind of lithium battery SOH based on cycle-index statistics estimates
Meter method.
Background technology
For battery technology as new energy source technology, development is swift and violent, wherein, lithium battery because have small volume, energy density greatly,
The advantages that environmental pollution is small, and then be used widely.
In order to ensure that lithium battery is capable of the work of highly effective and safe, it is necessary to an effective battery management system, wherein on
Lithium battery SOH（State Of Health, cell health state）Research be technical field of lithium batteries key subject, accurately
The health status of prediction lithium battery has very great meaning for the practical application of lithium battery.
At present, mainly there are electric discharge, internal driving method, electrochemical credit to battery health SOH methods of estimation both at home and abroad
Analysis and modelling.Above method, tested more based on laboratory, or even need expensive experimental facilities or destroy battery structure, led
It is unavailable to send a telegraph pond.
The problem of in correlation technique, effective solution is not yet proposed at present.
The content of the invention
For the above-mentioned technical problem in correlation technique, the present invention proposes a kind of lithium battery based on cycle-index statistics
SOH methods of estimation, it can simply and effectively realize that cell health state is estimated.
To realize above-mentioned technical purpose, the technical proposal of the invention is realized in this way：
A kind of lithium battery SOH methods of estimation based on cycle-index statistics, including：
S1 records the ampere-hour number B of each charge or discharge, then cycle-index N=B/A*0.5, and wherein A is the rated capacity of battery
Ampere-hour number；
The health status SOH of S2 batteries=(L- ∑ N)/L*100%, wherein L is the nominal cycle number of battery, and ∑ N represents accumulative
Cycle-index.
Further, the circulation is completely filled with battery, completely puts and be once designated as one cycle.
Further, the ampere-hour number to be discharged every time by battery management system software records battery.
Beneficial effects of the present invention：1. circulating battery number is calculated by capacity method, it is easy to accomplish, reliability is high；2.
Because battery is integrally fixed on electric automobile, circulating battery number can be counted by normal discharge and recharge, the method need not be torn open
Battery bag is unloaded, and without expensive experimental facilities, reduces cost.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described reality
It is only part of the embodiment of the present invention to apply example, rather than whole embodiments.Based on the embodiment in the present invention, this area
The every other embodiment that those of ordinary skill is obtained, belongs to the scope of protection of the invention.
Described a kind of lithium battery SOH methods of estimation based on cycle-index statistics according to embodiments of the present invention, including：
S1 records the ampere-hour number B of each charge or discharge, then cycle-index N=B/A*0.5, and wherein A is the rated capacity of battery
Ampere-hour number；
The health status SOH of S2 batteries=(L- ∑ N)/L*100%, wherein L is the nominal cycle number of battery, and ∑ N represents accumulative
Cycle-index.
Further, the circulation is completely filled with battery, completely puts and be once designated as one cycle.
Further, the ampere-hour number to be discharged every time by battery management system software records battery.
In order to facilitate understand the present invention above-mentioned technical proposal, below by way of in specifically used mode to the present invention it is above-mentioned
Technical scheme is described in detail.
When specifically used, according to a kind of lithium battery SOH methods of estimation counted based on cycle-index of the present invention,
By taking certain brand battery as an example, battery pack rated capacity ampere-hour number A is 210Ah, and nominal cycle number L when battery just dispatches from the factory is
1500。
By battery management system software records, it is 168Ah that certain, which puts ampere-hour number B, according to formula N=B/A*
0.5, then this cycle-index N=168/210*0.5=0.4.
The rest may be inferred, it is assumed that by 100 charge and discharge cycles, number is cumulative and is 50, then is estimated that by formula
The now health status SOH of battery
Finally, the health status SOH of battery can be calculated：
SOH=（1500-50）/1500 * 100%=96.7%
In summary, circulating battery number is calculated by capacity method by means of the above-mentioned technical proposal of the present invention, 1., is easy to real
Existing, reliability is high；2. because battery is integrally fixed on electric automobile, circulating battery can be counted by normal discharge and recharge
Number, the method need not dismantle battery bag, and without expensive experimental facilities, reduce cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (3)
- A kind of 1. lithium battery SOH methods of estimation based on cycle-index statistics, it is characterised in that including：S1 records the ampere-hour number B of each charge or discharge, then cycle-index N=B/A*0.5, and wherein A is the rated capacity of battery Ampere-hour number；The health status SOH of S2 batteries=(L- ∑ N)/L*100%, wherein L is the nominal cycle number of battery, and ∑ N represents accumulative Cycle-index.
- 2. the lithium battery SOH methods of estimation according to claim 1 based on cycle-index statistics, it is characterised in that described Circulation is completely filled with battery, completely puts and be once designated as one cycle.
- 3. the lithium battery SOH methods of estimation according to claim 1 based on cycle-index statistics, it is characterised in that pass through The ampere-hour number that battery management system software records battery discharges every time.
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| CN201710695388.5A CN107607875A (en) | 2017-08-15 | 2017-08-15 | Lithium battery SOH methods of estimation based on cycle-index statistics |
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| CN201710695388.5A CN107607875A (en) | 2017-08-15 | 2017-08-15 | Lithium battery SOH methods of estimation based on cycle-index statistics |
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Cited By (7)
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|---|---|---|---|---|
| CN109613445A (en) * | 2018-12-28 | 2019-04-12 | 蜂巢能源科技有限公司 | A kind of method and apparatus of the health status of estimated driving force battery |
| CN111366865A (en) * | 2020-03-25 | 2020-07-03 | 松下电器机电（中国）有限公司 | Method for calculating health degree of battery |
| CN112180280A (en) * | 2020-09-27 | 2021-01-05 | 吉林大学 | Hybrid electric vehicle battery life optimization method considering battery health state |
| CN112557909A (en) * | 2020-12-17 | 2021-03-26 | 四川虹微技术有限公司 | Lithium battery service life detection system and method based on internal resistance |
| CN113030739A (en) * | 2021-02-22 | 2021-06-25 | 福建星云电子股份有限公司 | Method for estimating battery performance index in charging process |
| CN113655397A (en) * | 2020-05-12 | 2021-11-16 | 北京京东乾石科技有限公司 | Method, device and storage medium for determining full charge and discharge frequency of battery |
| CN114791993A (en) * | 2022-05-16 | 2022-07-26 | 江苏大学 | SOH prediction method and system for power battery pack |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613445A (en) * | 2018-12-28 | 2019-04-12 | 蜂巢能源科技有限公司 | A kind of method and apparatus of the health status of estimated driving force battery |
| CN109613445B (en) * | 2018-12-28 | 2021-05-25 | 蜂巢能源科技有限公司 | Method and device for estimating state of health of power battery |
| CN111366865A (en) * | 2020-03-25 | 2020-07-03 | 松下电器机电（中国）有限公司 | Method for calculating health degree of battery |
| CN113655397A (en) * | 2020-05-12 | 2021-11-16 | 北京京东乾石科技有限公司 | Method, device and storage medium for determining full charge and discharge frequency of battery |
| CN112180280A (en) * | 2020-09-27 | 2021-01-05 | 吉林大学 | Hybrid electric vehicle battery life optimization method considering battery health state |
| CN112557909A (en) * | 2020-12-17 | 2021-03-26 | 四川虹微技术有限公司 | Lithium battery service life detection system and method based on internal resistance |
| CN112557909B (en) * | 2020-12-17 | 2023-08-04 | 四川虹微技术有限公司 | Lithium battery life detection system and method based on internal resistance |
| CN113030739A (en) * | 2021-02-22 | 2021-06-25 | 福建星云电子股份有限公司 | Method for estimating battery performance index in charging process |
| CN114791993A (en) * | 2022-05-16 | 2022-07-26 | 江苏大学 | SOH prediction method and system for power battery pack |
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Application publication date: 20180119 |