CN109794439A - A kind of lithium battery performance screening technique - Google Patents
A kind of lithium battery performance screening technique Download PDFInfo
- Publication number
- CN109794439A CN109794439A CN201710823166.7A CN201710823166A CN109794439A CN 109794439 A CN109794439 A CN 109794439A CN 201710823166 A CN201710823166 A CN 201710823166A CN 109794439 A CN109794439 A CN 109794439A
- Authority
- CN
- China
- Prior art keywords
- battery
- discharge
- screening technique
- lithium battery
- preset time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of lithium battery performance screening technique, belong to field of batteries, step include: by battery under the first preset temperature, shelve the first preset time；The charging operations and discharge operation for repeating the last time or more, obtain the discharge capacity of each battery；The discharge platform curve of battery and the consistent battery of charging platform curve are classified as a gear；Filter out qualified battery.This kind of lithium battery performance screening technique, can filter out the single battery of similar performance, guarantee the capacity and service life of battery pack.
Description
Technical field
The present invention relates to field of batteries, more particularly to a kind of lithium battery performance screening technique.
Background technique
Lithium ion battery is high with energy density, power density is high, has extended cycle life, good reliability, highly-safe, volume
The advantages that small, light-weight, becomes electric car first choice electrical source of power.Lithium battery method is more and more mature at present, each producer, enterprise
Compete more and more fierce, the consistency quality of battery combination is even more important for improving product quality, reducing production cost, still
Since single battery is influenced by material property, working condition, equipment precision, method level etc., its capacity, voltage, interior is caused
The parameters such as resistance have differences, and there are inconsistencies between single lithium battery, influence the capacity and service life of battery pack.
Summary of the invention
To solve the problem above-mentioned, the present invention provides a kind of lithium battery performance screening techniques, can filter out performance phase
Close single battery guarantees the capacity and service life of battery pack.
The technical solution used in the present invention is: a kind of lithium battery performance screening technique, step include:
S1, by least more than one battery under the first preset temperature, shelve the first preset time；
S2, charging operations: to shelving the battery after the first preset time with the first predetermined current constant-current charge to first section
Only voltage, and with the first blanking voltage constant-voltage charge to the first cut-off current；
Discharge operation: after battery is shelved the second preset time again, to battery with the second predetermined current constant-current discharge to
Two blanking voltages test out the discharge time of each battery, and with the second blanking voltage constant voltage discharge third preset time；
Charging operations and discharge operation more than being repeated at least once more obtain average discharge times, the electric discharge of each battery
Platform curve and charging platform curve, calculate the discharge capacity of each battery；
S3, it filters out discharge capacity and goes out discharge platform curve in the battery of same grade, then by the battery testing filtered out
It is compared with charging platform curve, discharge platform curve and the consistent battery of charging platform curve is classified as a gear；
S4, above-mentioned same gear battery under the second preset temperature, shelve the 4th preset time；It is same to all batteries again
The test of Shi Jinhang open-circuit voltage and internal resistance, to filter out qualified battery, every money battery criterion of acceptability is advised according to national standard
Fixed open-circuit voltage and internal resistance is screened.
In the above-mentioned methods, the calculation formula of the discharge capacity of each battery are as follows: discharge capacity=second predetermined current is permanent
Stream × average discharge times.
In the above-mentioned methods, charging operations and discharge operation are operated on battery detecting cabinet, are obtained with direct test every
Average discharge times, discharge platform curve and the charging platform curve of a battery.
In the above-mentioned methods, the first preset temperature is 22-28 DEG C, reduces influence of the environment temperature to battery.
In the above-mentioned methods, the first preset time is 5-30min, and ensure that can investigate self-discharge of battery situation.
In the above-mentioned methods, the first predetermined current is 1-2C, and the first blanking voltage is 2.6-3.0V, and the first cut-off current is
6-10A guarantees battery constant charge.
In the above-mentioned methods, the second predetermined current is 1-2C, and the second blanking voltage is 1.4-1.8V, and the second preset time is
5-10min, third preset time are 60-120min, guarantee battery stable discharging.
In the above-mentioned methods, charging operations and discharge operation number of repetition are 2-6 times, can reach screening effect, also not
The service life of battery can be influenced because of excessive charging and discharging.
In the above-mentioned methods, second preset temperature is 45-60 DEG C, and the 4th preset time is 1-5 days, be ensure that
The self discharge situation of battery high-temperature can be investigated.
A kind of lithium battery performance screening technique of the present invention, has the beneficial effect that:
1. method parameter setting is rationally, is recycled by charging operations more than once and discharge operation, improve battery capacity
Consistency；
2. the battery of the same grade of pair discharge capacity carries out discharge platform curve and charging platform curve comparison and certain item
The screening of voltage and internal resistance, allows battery consistency to be optimal under part；
3. being suitable for batch production, guarantee to provide foundation to the inspection of single battery method while product quality requires.
Detailed description of the invention
Fig. 1 is a kind of lithium battery performance screening technique flow chart of the invention；
Fig. 2 is that the battery of common performance screening technique carries out performance and consistency comparative analysis figure；
Fig. 3 is that a kind of battery of lithium battery performance screening technique of the invention carries out performance and consistency analysis figure.
Specific embodiment
The invention will now be described in further detail with reference to the accompanying drawings.
Fig. 1 schematically shows a kind of a kind of lithium battery performance screening technique of embodiment according to the present invention.
Embodiment one:
This kind of lithium battery performance screening technique, the lithium battery of required screening are to be by positive electrode and lithium titanate of LiMn2O4
The aluminum shell column lithium battery of negative electrode material, step include:
S1,50 batteries are placed on grading system, are arranged at 25 DEG C of the first preset temperature and shelve the first preset time
5min；
S2, charging operations: to shelving the battery after the first preset time with the first predetermined current 2C constant-current charge to first
Blanking voltage 2.6V, and with the first blanking voltage constant-voltage charge to the first cut-off current 6A.
Discharge operation: after battery is shelved the second preset time 10min again, battery is put with the second predetermined current 1C constant current
Electricity is to the second blanking voltage 1.5V, and with the second blanking voltage constant voltage discharge third preset time 120min, then shelves 10min；
Upper 3 charging operations and discharge operation are repeated, charging operations and discharge operation are operated on battery detecting cabinet, directly to survey
Examination obtains the average discharge times, discharge platform curve and charging platform curve of each battery, the default electricity of discharge capacity=the second
Constant current × average discharge times are flowed, the discharge capacity of each battery is calculated；
S3, filter out discharge capacity in the battery of same grade, then by the battery filtered out carry out discharge platform curve and
Charging platform curve compares, and discharge platform curve and the consistent battery of charging platform curve are classified as a gear；
S4, above-mentioned same gear battery at 45 DEG C of the second preset temperature, shelve the 4th preset time 1 day；Again to all
Battery carry out the test of open-circuit voltage and internal resistance simultaneously, to filter out qualified battery, every money battery criterion of acceptability is according to state
Open-circuit voltage as defined in family's standard and internal resistance are screened.
In order to be better understood by the difference of this kind of lithium battery performance screening technique Yu common performance screening technique, using implementation
The battery that battery that this kind of lithium battery performance screening technique of example one obtains and common performance screening technique obtain carry out performance and
Consistency comparison.Common selective mechanisms method is: be charged to the electric current constant current of 1C by voltage, then with the electric current of 1C put to by
Voltage, partial volume finish.As shown in Fig. 2, being decayed to after 2000 circulations using the 2EA battery of common method for testing performance
49.0%, 47.3% and consistency it is poor, as shown in figure 3, and the battery warp that is obtained using this kind of lithium battery performance screening technique
Go through 2000 times circulation after, capacity retention ratio still 100% or more and consistency it is good.
Embodiment two:
This kind of lithium battery performance screening technique, the lithium battery of required screening are that nickle cobalt lithium manganate is positive electrode and lithium titanate
For the aluminum shell column lithium battery of negative electrode material, step includes:
S1,50 batteries are placed on grading system, are arranged at 30 DEG C of the first preset temperature and shelve the first preset time
30min；
S2, charging operations: to shelving the battery after the first preset time with the first predetermined current 1C constant-current charge to first
Blanking voltage 3.0V, and with the first blanking voltage constant-voltage charge to the first cut-off current 10A；Discharge operation: battery is shelved again
After second preset time 5min, to battery with the second predetermined current 1C constant-current discharge to the second blanking voltage 1.8V, and with second
Blanking voltage constant voltage discharge third preset time 60min, then shelve 5min；Upper 5 charging operations and discharge operation are repeated, is filled
Electrically operated and discharge operation is operated on battery detecting cabinet, is obtained the average discharge times of each battery with direct test, is put
Level platform curve and charging platform curve, discharge capacity=the second predetermined current constant current × average discharge times, calculate each
The discharge capacity of battery；
S3, filter out discharge capacity in the battery of same grade, then by the battery filtered out carry out discharge platform curve and
Charging platform curve compares, and discharge platform curve and the consistent battery of charging platform curve are classified as a gear；
S4, above-mentioned same gear battery at 60 DEG C of the second preset temperature, shelve the 4th preset time 5 days；Again to all
Battery carry out the test of open-circuit voltage and internal resistance simultaneously, to filter out qualified battery, every money battery criterion of acceptability is according to state
Open-circuit voltage as defined in family's standard and internal resistance are screened.
The above embodiments are merely illustrative and not limiting of the invention, therefore all according to described in present patent application range
The equivalent change or modification done of method, be included in the scope of the patent application of the present invention.
Claims (9)
1. a kind of lithium battery performance screening technique, which is characterized in that its step includes:
S1, by least more than one battery under the first preset temperature, shelve the first preset time；
S2, charging operations: to shelving the battery after the first preset time with the first predetermined current constant-current charge to the first cut-off electricity
Pressure, and with the first blanking voltage constant-voltage charge to the first cut-off current；
Discharge operation: after battery is shelved the second preset time again, to battery with the second predetermined current constant-current discharge to second section
Only voltage tests out the discharge time of each battery, and with the second blanking voltage constant voltage discharge third preset time；
Charging operations and discharge operation more than being repeated at least once more obtain average discharge times, the discharge platform of each battery
Curve and charging platform curve, calculate the discharge capacity of each battery；
S3, discharge capacity is filtered out in the battery of same grade, then the battery testing filtered out is gone out into discharge platform curve and is filled
Level platform curve compares, and discharge platform curve and the consistent battery of charging platform curve are classified as a gear；
S4, above-mentioned same gear battery under the second preset temperature, shelve the 4th preset time；Again to all batteries simultaneously into
The test of row open-circuit voltage and internal resistance, to filter out qualified battery.
2. a kind of lithium battery performance screening technique according to claim 1, it is characterised in that: the discharge capacity of each battery
Calculation formula are as follows: discharge capacity=the second predetermined current constant current × average discharge times.
3. a kind of lithium battery performance screening technique according to claim 1 or 2, it is characterised in that: charging operations and electric discharge
Operation is operated on battery detecting cabinet, with it is direct test obtain the average discharge times of each battery, discharge platform curve and
Charging platform curve.
4. a kind of lithium battery performance screening technique according to claim 1, it is characterised in that: first preset temperature is
22-28℃。
5. a kind of lithium battery performance screening technique according to claim 1 or 4, it is characterised in that: it is described first it is default when
Between be 5-30min.
6. a kind of lithium battery performance screening technique according to claim 1, it is characterised in that: first predetermined current is
1-2C, the first blanking voltage are 2.6-3.0V, and the first cut-off current is 6-10A.
7. a kind of lithium battery performance screening technique according to claim 1 or 6, it is characterised in that: two predetermined current
For 1-2C, the second blanking voltage is 1.4-1.8V, and the second preset time is 5-10min, and third preset time is 60-120min.
8. a kind of lithium battery performance screening technique according to claim 1 or 6, it is characterised in that: the charging operations and
Discharge operation number of repetition is 2-6 times.
9. a kind of according to claim 1, lithium battery performance screening technique described in 4 or 6, it is characterised in that: described second is default
Temperature is 45-60 DEG C, and the 4th preset time is 1-5 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823166.7A CN109794439A (en) | 2017-11-16 | 2017-11-16 | A kind of lithium battery performance screening technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823166.7A CN109794439A (en) | 2017-11-16 | 2017-11-16 | A kind of lithium battery performance screening technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109794439A true CN109794439A (en) | 2019-05-24 |
Family
ID=66554567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710823166.7A Pending CN109794439A (en) | 2017-11-16 | 2017-11-16 | A kind of lithium battery performance screening technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109794439A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496799A (en) * | 2019-07-26 | 2019-11-26 | 浙江锋锂新能源科技有限公司 | High efficiency is at the method for differentiating abnormal battery core |
| CN110639844A (en) * | 2019-08-26 | 2020-01-03 | 上海空间电源研究所 | Lithium ion storage battery consistency screening method for space aircraft |
| CN110694946A (en) * | 2019-09-16 | 2020-01-17 | 合肥鸿叶紫新能源有限公司 | Method for rapidly sorting lithium ion batteries |
| CN111092265A (en) * | 2019-12-04 | 2020-05-01 | 昆明理工大学 | Preparation method of positive electrode support type all-solid-state lithium ion battery |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101323A (en) * | 2007-07-23 | 2008-01-09 | 周汉文 | Lithium battery capacity quick detection method |
| CN103178307A (en) * | 2013-03-26 | 2013-06-26 | 奇瑞汽车股份有限公司 | Power battery assembling method |
| CN103464388A (en) * | 2013-09-26 | 2013-12-25 | 上海动力储能电池系统工程技术有限公司 | Lithium ion battery screening method |
| CN103515644A (en) * | 2012-06-25 | 2014-01-15 | 哈尔滨智木科技有限公司 | Production process for realization of consistency of power battery pack |
| CN103545567A (en) * | 2013-10-16 | 2014-01-29 | 宁波世捷新能源科技有限公司 | Method used for rapid sorting of lithium ion batteries |
| CN104409780A (en) * | 2014-12-12 | 2015-03-11 | 河北银隆新能源有限公司 | Forming method of lithium titanate battery |
| CN106684475A (en) * | 2017-01-16 | 2017-05-17 | 哈尔滨理工大学 | Method for sorting lithium iron phosphate batteries |
| CN106824831A (en) * | 2016-12-19 | 2017-06-13 | 金同林 | A kind of manufacture method of the motive-power battery for improving lithium ion battery uniformity |
| JP6210552B2 (en) * | 2014-03-04 | 2017-10-11 | 古河電気工業株式会社 | Secondary battery state detection device and secondary battery state detection method |
-
2017
- 2017-11-16 CN CN201710823166.7A patent/CN109794439A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101323A (en) * | 2007-07-23 | 2008-01-09 | 周汉文 | Lithium battery capacity quick detection method |
| CN103515644A (en) * | 2012-06-25 | 2014-01-15 | 哈尔滨智木科技有限公司 | Production process for realization of consistency of power battery pack |
| CN103178307A (en) * | 2013-03-26 | 2013-06-26 | 奇瑞汽车股份有限公司 | Power battery assembling method |
| CN103464388A (en) * | 2013-09-26 | 2013-12-25 | 上海动力储能电池系统工程技术有限公司 | Lithium ion battery screening method |
| CN103545567A (en) * | 2013-10-16 | 2014-01-29 | 宁波世捷新能源科技有限公司 | Method used for rapid sorting of lithium ion batteries |
| JP6210552B2 (en) * | 2014-03-04 | 2017-10-11 | 古河電気工業株式会社 | Secondary battery state detection device and secondary battery state detection method |
| CN104409780A (en) * | 2014-12-12 | 2015-03-11 | 河北银隆新能源有限公司 | Forming method of lithium titanate battery |
| CN106824831A (en) * | 2016-12-19 | 2017-06-13 | 金同林 | A kind of manufacture method of the motive-power battery for improving lithium ion battery uniformity |
| CN106684475A (en) * | 2017-01-16 | 2017-05-17 | 哈尔滨理工大学 | Method for sorting lithium iron phosphate batteries |
Non-Patent Citations (2)
| Title |
|---|
| 姜久春: "《电动汽车充电设施运行与维护技术》", 28 February 2016 * |
| 邓宏彬，王超，赵娜，徐远清: "《中小型智能弹药舵机系统设计与应用技术》", 30 April 2016, 北京：国防工业出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496799A (en) * | 2019-07-26 | 2019-11-26 | 浙江锋锂新能源科技有限公司 | High efficiency is at the method for differentiating abnormal battery core |
| CN110496799B (en) * | 2019-07-26 | 2021-05-07 | 浙江锋锂新能源科技有限公司 | Method for distinguishing abnormal cell by formation |
| CN110639844A (en) * | 2019-08-26 | 2020-01-03 | 上海空间电源研究所 | Lithium ion storage battery consistency screening method for space aircraft |
| CN110639844B (en) * | 2019-08-26 | 2022-02-01 | 上海空间电源研究所 | Lithium ion storage battery consistency screening method for space aircraft |
| CN110694946A (en) * | 2019-09-16 | 2020-01-17 | 合肥鸿叶紫新能源有限公司 | Method for rapidly sorting lithium ion batteries |
| CN111092265A (en) * | 2019-12-04 | 2020-05-01 | 昆明理工大学 | Preparation method of positive electrode support type all-solid-state lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104502859B (en) | The detection of battery charge amount and cell health state, diagnostic method | |
| CN109794439A (en) | A kind of lithium battery performance screening technique | |
| CN106824831A (en) | A kind of manufacture method of the motive-power battery for improving lithium ion battery uniformity | |
| CN109663756B (en) | Battery core screening method and medium based on self-discharge rate | |
| CN107607881A (en) | A kind of evaluation method of lithium-ion-power cell self discharge uniformity | |
| Swierczynski et al. | Field tests experience from 1.6 MW/400kWh Li-ion battery energy storage system providing primary frequency regulation service | |
| CN102394315B (en) | Cell characteristic vector based lithium ion cell configuration method | |
| CN110165319A (en) | A kind of method for separating of high-capacity lithium battery self-discharge performance | |
| CN109494412B (en) | LFP lithium ion battery cell capacity grading screening method | |
| KR20220052924A (en) | How to test endurance for battery pulse heating and how to create system and data table | |
| CN107290668A (en) | The screening method for group matching that a kind of batteries of electric automobile echelon is utilized | |
| CN107579298A (en) | Lithium ion battery grouping method | |
| CN103894350B (en) | The partial volume screening method for group matching of cylindrical lithium battery | |
| CN107991615A (en) | Method for representing performance of battery cathode material by lithium content | |
| Kim et al. | Screening process of Li-Ion series battery pack for improved voltage/SOC balancing | |
| CN111063951A (en) | Method for screening and matching self-discharge of lithium ion battery | |
| CN106707179A (en) | Method and device for predicting capacity of battery | |
| CN103956513A (en) | Matching method of high-capacity lithium power batteries | |
| CN112397788A (en) | Novel battery capacity grading and grouping method | |
| Pérez et al. | Guidelines for the characterization of the internal impedance of lithium-ion batteries in PHM algorithms | |
| CN108008313A (en) | The screening technique of lithium ion battery self discharge | |
| CN113552494B (en) | Low-temperature step charging method and testing method for lithium ion battery | |
| Aizpuru et al. | Battery pack tests to detect unbalancing effects in series connected Li-ion cells | |
| CN206558637U (en) | A kind of lithium ion battery self discharge screening plant | |
| CN114675196A (en) | Battery cell state detection method and device and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190524 |
|
| RJ01 | Rejection of invention patent application after publication |