CN109581232A - A method of determining that can battery core repetition measurement - Google Patents
A method of determining that can battery core repetition measurement Download PDFInfo
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- CN109581232A CN109581232A CN201811517814.7A CN201811517814A CN109581232A CN 109581232 A CN109581232 A CN 109581232A CN 201811517814 A CN201811517814 A CN 201811517814A CN 109581232 A CN109581232 A CN 109581232A
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Abstract
The invention discloses it is a kind of judgement battery core can repetition measurement method, contain in the step of method: S1: according to judgement battery core, SOC-OCV characteristic curve in conjunction with battery core and the SOC drop-out value in permission time t according to SOC drop-out value and combine SOC-OCV characteristic curve, confirm voltage drop-out value Δ V；S2: when battery core chemical conversion abends, battery core voltage V1 at this time is recorded；S3: acquisition battery core is melted into the battery core voltage V2 to abend the 1st minute, calculates first pressure difference V12=V1-V2, when the first pressure difference V12 is more than the first pressure difference specification Δ V1, then showing can not repetition measurement；Δ V1=(Δ V/t) * t1, t1=1min；S4: it when the first pressure difference V12 is in the first pressure difference specification Δ V1, then acquires battery core and is melted into the battery core voltage V3 to abend the 4th minute, calculate second pressure difference V23=V2-V3, when the second pressure difference V23 is more than the second pressure difference specification Δ V2, then showing can not repetition measurement；Δ V2=(Δ V/t) * t2, t2=3min.The present invention can carry out preliminary judgement to the security performance of battery core, reduce battery core erroneous judgement, reduce chemical conversion repetition measurement risk.
Description
Technical field
The present invention relates to it is a kind of judgement battery core can repetition measurement method.
Background technique
Currently, chemical conversion is a step important in lithium ion battery production technology, predominantly activated batteries, formed stable
SEI film excludes to produce gas, guarantees the process of subsequent stable chemical property, and chemical conversion repetition measurement in formation process for generating
The means that bad product is melted into again, tying up disk is the process for binding each battery core and pallet one by one.Currently formation process is bad
In product, only occur " voltage jump ", " overtemperature ", " abnormal point number is exceeded " problem battery core can through judgement after repetition measurement, occur
There is certain erroneous judgement without determining or manually determining, will lead in the battery core of other problems without determining with regard to directly carrying out repetition measurement
There are some potential safety problemss for repetition measurement, and bracing wire is higher to Personnel Dependence degree, and bad product needs artificial discharge, and need artificial
Disk is tied up manually and carries out repetition measurement, and there are many battery core quantity that daily equipment discharge need to manually tie up disk.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, can provide a kind of judgement battery core repetition measurement
Method, it can to the security performance of battery core carry out preliminary judgement, reduce battery core erroneous judgement, reduce chemical conversion repetition measurement risk.
In order to solve the above-mentioned technical problem, the technical scheme is that it is a kind of determine battery core can repetition measurement method, side
Contain in the step of method:
S1: according to judgement battery core, the SOC-OCV characteristic curve in conjunction with battery core and the SOC drop-out value in permission time t, according to
SOC drop-out value simultaneously combines SOC-OCV characteristic curve, confirms voltage drop-out value Δ V；
S2: in battery core formation process, when battery core chemical conversion abends, battery core voltage V1 at this time is recorded；
S3: then acquiring battery core and be melted into the battery core voltage V2 that abends the 1st minute, calculate first pressure difference V12=V1-V2, when the
When one pressure difference V12 is more than the first pressure difference specification Δ V1, then showing can not repetition measurement；Wherein, Δ V1=(Δ V/t) * t1, t1=1min；
S4: when the first pressure difference V12 is in the first pressure difference specification Δ V1, then then the chemical conversion of acquisition battery core abends the 4th minute
Battery core voltage V3, calculate second pressure difference V23=V2-V3 then show when the second pressure difference V23 is more than the second pressure difference specification Δ V2
It can not repetition measurement；Wherein, Δ V2=(Δ V/t) * t2, t2=3min.
Further, in step S3 and/or step S4, battery core is determined can not be after repetition measurement, and need to manually determine whether can be multiple
It surveys, it is artificial to determine energy repetition measurement, then disk repetition measurement is tied up again.
Using above-mentioned technical proposal, equipment can determine whether there is security risk, no safety wind using this method to battery core
The battery core of danger will carry out repetition measurement automatically, have security risk battery core to will be unable to repetition measurement, determine again after discharge to engineer, reduce electricity
Core erroneous judgement reduces chemical conversion repetition measurement risk.And due to battery core can with automatic retesting, need employee tie up manually the battery core quantity of disk from
300EA/ bracing wire/day before is reduced to 20EA/ bracing wire/day, and the degree of automation improves, and reduces human cost and artificial accidentally behaviour
Battery core caused by work is scrapped.
Detailed description of the invention
Fig. 1 is that normal battery core of the invention stops the voltage curve after chemical conversion；
Fig. 2 is that risk battery core of the invention stops the voltage curve after chemical conversion；
Fig. 3 is the SOC-OCV performance diagram of battery core.
Specific embodiment
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail.
After stopping chemical conversion, there are larger differences, normal battery core to stop for voltage drop-out value between normal battery core and risk battery core
After chemical conversion, due to unpolarizing, voltage has to be declined to a certain degree, but decrease speed is slower, as shown in Figure 1；Risk battery core is stopped
After being only melted into, voltage can be continued to decline, and decrease speed is significantly faster than that normal battery core, as shown in Fig. 2, being proposed according to this logic
It is a kind of determine battery core can repetition measurement method, the step of method in contain:
S1: according to judgement battery core, the SOC-OCV characteristic curve (as shown in Figure 3) in conjunction with battery core and the SOC in permission time t
Drop-out value according to SOC drop-out value and combines SOC-OCV characteristic curve, confirms voltage drop-out value Δ V；Wherein, the SOC- of battery core
OCV characteristic curve and the SOC drop-out value in permission time t are the performance data for the battery core that client provides；
S2: in battery core formation process, when battery core chemical conversion abends, battery core voltage V1 at this time is recorded；
S3: then acquiring battery core and be melted into the battery core voltage V2 that abends the 1st minute, calculate first pressure difference V12=V1-V2, when the
When one pressure difference V12 is more than the first pressure difference specification Δ V1, then show can not repetition measurement, battery core be risk battery core；Wherein, Δ V1=(Δ V/
T) * t1, t1=1min；
S4: when the first pressure difference V12 is in the first pressure difference specification Δ V1, then then the chemical conversion of acquisition battery core abends the 4th minute
Battery core voltage V3, calculate second pressure difference V23=V2-V3 then show when the second pressure difference V23 is more than the second pressure difference specification Δ V2
Can not repetition measurement, battery core be risk battery core；Wherein, Δ V2=(Δ V/t) * t2, t2=3min；If the second pressure difference V23 is in the second pressure difference
When in specification Δ V2, then can automatic retesting, to determine whether battery core has a security risk automatically, the battery core of no security risk incite somebody to action from
It is dynamic to carry out repetition measurement, there is security risk battery core to will be unable to repetition measurement.
In step S3 and/or step S4, battery core be determined can not after repetition measurement, need to manually determine whether can repetition measurement, manually
Determine energy repetition measurement, then ties up disk repetition measurement again, reduce battery core caused by human cost and artificial incorrect operation and scrap.
In the present embodiment, battery core voltage V1, chemical conversion when equipment can abend chemical conversion abend the 1st minute
The battery core voltage V3 that battery core voltage V2 and chemical conversion abend the 4th minute is uploaded to MES, and MES is according to the method in the present embodiment
Determine whether battery core has security risk.
In the present embodiment, chemical conversion, repetition measurement and to tie up disk be the proprietary term in lithium ion battery production process, change
It at predominantly activated batteries, is formed stable SEI film (solid electrolyte interface film), excludes to produce gas, guarantee subsequent stable electricity
The process of chemical property, repetition measurement are the means being melted into again for the bad product generated in formation process, tie up disk be will be each
The process that battery core and pallet are bound one by one.
Working principle of the present invention is as follows:
The battery core voltage V2 and chemical conversion that battery core voltage V1, chemical conversion when being abended by acquiring chemical conversion abend the 1st minute
The battery core voltage V3 to abend the 4th minute, calculates the first pressure difference V12 and the second pressure difference V23, the first pressure difference V12 of comparison and
First pressure difference specification Δ V1, the second pressure difference V23 and the second pressure difference specification Δ V2, when the first pressure difference V12 is in the first pressure difference specification Δ
In V1 and the second pressure difference V23 is in the second pressure difference specification Δ V2, then can automatic retesting, conversely, by manually determine whether can repetition measurement,
It is artificial to determine energy repetition measurement, then disk repetition measurement is tied up again.
Particular embodiments described above, pair present invention solves the technical problem that, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this
Invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection scope.
Claims (2)
1. it is a kind of determine battery core can repetition measurement method, it is characterised in that: contain in the step of method:
S1: according to judgement battery core, the SOC-OCV characteristic curve in conjunction with battery core and the SOC drop-out value in permission time t, according to
SOC drop-out value simultaneously combines SOC-OCV characteristic curve, confirms voltage drop-out value Δ V；
S2: in battery core formation process, when battery core chemical conversion abends, battery core voltage V1 at this time is recorded；
S3: then acquiring battery core and be melted into the battery core voltage V2 that abends the 1st minute, calculate first pressure difference V12=V1-V2, when the
When one pressure difference V12 is more than the first pressure difference specification Δ V1, then showing can not repetition measurement；Wherein, Δ V1=(Δ V/t) * t1, t1=1min；
S4: when the first pressure difference V12 is in the first pressure difference specification Δ V1, then then the chemical conversion of acquisition battery core abends the 4th minute
Battery core voltage V3, calculate second pressure difference V23=V2-V3 then show when the second pressure difference V23 is more than the second pressure difference specification Δ V2
It can not repetition measurement；Wherein, Δ V2=(Δ V/t) * t2, t2=3min.
2. 1 method according to claim, it is characterised in that: in step S3 and/or step S4, judgement can not repetition measurement
Afterwards, it need to manually determine whether energy repetition measurement, it is artificial to determine energy repetition measurement, then disk repetition measurement is tied up again.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517814.7A CN109581232B (en) | 2018-12-12 | 2018-12-12 | Method for judging whether battery cell can be retested or not |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517814.7A CN109581232B (en) | 2018-12-12 | 2018-12-12 | Method for judging whether battery cell can be retested or not |
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| Publication Number | Publication Date |
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| CN109581232A true CN109581232A (en) | 2019-04-05 |
| CN109581232B CN109581232B (en) | 2020-12-22 |
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Citations (6)
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| US20090171601A1 (en) * | 2007-12-29 | 2009-07-02 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Battery detection device and method thereof |
| CN201464622U (en) * | 2009-06-26 | 2010-05-12 | 天津力神电池股份有限公司 | IROCV on-line retest system |
| CN201548668U (en) * | 2009-11-10 | 2010-08-11 | 天津力神电池股份有限公司 | Retest-free high-efficiency voltage/internal resistance testing system of battery |
| CN108279386A (en) * | 2018-02-05 | 2018-07-13 | 惠州亿纬锂能股份有限公司 | A kind of battery core screening technique |
| CN108490355A (en) * | 2018-03-06 | 2018-09-04 | 北京智行鸿远汽车有限公司 | A method of SOC acknowledging times are initialized according to OCV |
| CN108614221A (en) * | 2018-05-24 | 2018-10-02 | 河南电池研究院有限公司 | A kind of evaluation method of lithium ion battery formation process |
-
2018
- 2018-12-12 CN CN201811517814.7A patent/CN109581232B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090171601A1 (en) * | 2007-12-29 | 2009-07-02 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Battery detection device and method thereof |
| CN201464622U (en) * | 2009-06-26 | 2010-05-12 | 天津力神电池股份有限公司 | IROCV on-line retest system |
| CN201548668U (en) * | 2009-11-10 | 2010-08-11 | 天津力神电池股份有限公司 | Retest-free high-efficiency voltage/internal resistance testing system of battery |
| CN108279386A (en) * | 2018-02-05 | 2018-07-13 | 惠州亿纬锂能股份有限公司 | A kind of battery core screening technique |
| CN108490355A (en) * | 2018-03-06 | 2018-09-04 | 北京智行鸿远汽车有限公司 | A method of SOC acknowledging times are initialized according to OCV |
| CN108614221A (en) * | 2018-05-24 | 2018-10-02 | 河南电池研究院有限公司 | A kind of evaluation method of lithium ion battery formation process |
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