CN100465654C - Method for detecting short circuit of non-aqueous electrolyte secondary batteries - Google Patents
Method for detecting short circuit of non-aqueous electrolyte secondary batteries Download PDFInfo
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- CN100465654C CN100465654C CNB2006100156778A CN200610015677A CN100465654C CN 100465654 C CN100465654 C CN 100465654C CN B2006100156778 A CNB2006100156778 A CN B2006100156778A CN 200610015677 A CN200610015677 A CN 200610015677A CN 100465654 C CN100465654 C CN 100465654C
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Abstract
This invention discloses one non-aqueous electrolyte secondary battery short circuit test method, which comprises the following steps: adopting high voltage direct current inside resistance to make electrolyte and fro drying and cooling to the normal secondary battery set and testing the voltage between 100 to 500V and regarding the resistance lower 1Gomega for removing and doing waste; for the good secondary batter electrode set through alternating current through voltage meter with voltage set as 100 to 300V and with alarm current set as 0.01to 10mA and regarding the batter outside this range as short circuit.
Description
Technical field
The present invention relates to the nonaqueous electrolyte secondary rechargeable battery, particularly relate to a kind of method for detecting short circuit of non-aqueous electrolyte secondary batteries.
Background technology
For non-aqueous electrolyte secondary batteries, safety is the problem that always merits attention most, and in the project of influence safety, especially the most thorny with short circuit problem, because short-circuit condition directly causes the inside battery heat to increase severely, and nonaqueous electrolyte is because substantially based on the organic carbonate class, burning-point is very low, very easily in the process that battery temperature increases suddenly, produce oxidation reaction, and cause burning and blast.
Cause the reason of battery short circuit to have a lot, can reduce three aspects, one, battery material and chemical factor, with the lithium rechargeable battery is example, lithium is separated out and is deposited on accumulation and may cause barrier film to pierce through more for a long time and cause short circuit negative terminal surface, and battery diaphragm breaks and damage the short circuit that also can cause battery in addition; Two, mechanical factor, the stress damage to barrier film owing to cut the projection of process and the mechanical stress of lug outshot, may be caused in the ending of positive/negative plate and lug zone in the charging expansion process, finally cause battery short circuit; Three, quality factor since the utmost point powder on positive/negative plate surface comes off or battery manufacturing process in dust and the winding process introducing of mechanical residue all can cause possible battery short circuit.
In present actual production, above-mentioned preceding two aspects all can solve by optimizing battery design, improvement manufacture craft and production equipment, and the utmost point group short circuit that these reasons cause is apparent in view, can detect with common multimeter basically and sort out.So the most difficult in the actual battery production also is the most dangerous problem battery micro-short circuit that influence caused of quality just.For example in lithium battery client standard, there are high requirement in notebook and cell phone manufacturer to lithium battery safety.Battery short circuit after the basic demand shipment causes the blast proportional control in 0.3ppm.This also just requires battery production producer in process of production the battery that may cause battery short circuit to be sorted out as much as possible.
So non-aqueous secondary cell must be sorted out the battery sorting of short circuit and potential short circuit before charging, the selecting of short circuit battery before generally adopting multimeter to charge on producing at present, this under the low-voltage condition method of test DC internal resistance should not pick out the micro-short circuit battery.Main cause is under non-strong response stimulates, and is the battery that can't detect the solid impurity that contains the barrier film micropore that might cause short circuit and membrane surface.
Because safety problem is non-aqueous secondary cell key issue in application problem, so effective detection of short circuit battery is the target of secondary cell manufacturer effort for a long time.
Summary of the invention
The method for detecting short circuit that the purpose of this invention is to provide a kind of non-aqueous electrolyte secondary batteries, by improving the testing process of existing secondary cell, reach the purpose of effective rejecting short circuit and potential short circuit battery, farthest solved the short circuit explosion safety hidden danger of secondary cell.
The method for detecting short circuit of a kind of non-aqueous electrolyte secondary batteries of the present invention, it may further comprise the steps:
That (1) adopts that the test of high voltage direct current internal resistance test device made does not annotate electrolytic solution and fully is cooled to the secondary battery pole group of normal temperature after the oven dry, and test voltage is set in 100～500V, internal resistance is lower than 1G Ω is considered as short circuit, rejects, and transfers waste product to;
(2) test through the ac voltage withstanding tester for the qualified secondary battery pole group after detecting through step (1), test voltage is set at 100～300V, and alarm current is set at 0.01-10mA again, and the battery beyond this scope is considered as short circuit, rejects, and transfers waste product to.
Adopt the inventive method can effectively reject short circuit and potential short circuit battery, and can farthest solve the short circuit explosion safety hidden danger (shown in table 1,2) of secondary cell.
Table 1 is the present invention and traditional detection method (multimeter) five lot data for The data power god LP0403AG battery in the contrast table of short circuit battery recall rate
| Batch number | No.1 | No.2 | No.3 | No.4 | No.5 |
| Classic method | 0.167％ | 0.183％ | 0.162％ | 0.150％ | 0.129％ |
| The inventive method | 0.353％ | 0.349％ | 0.331％ | 0.326％ | 0.334％ |
Table 2 adopts the quick-fried spray comparison diagram of characterization processes front and back battery of the present invention
In the table 1,2, March is for using after the traditional technique in measuring quick-fried spray ratio in the battery charge and discharge process, 4,5, June the quick-fried spray ratio of battery for adopting the inventive method to detect.
| January | February | March | |
| Quick-fried spray ratio (ppm) | 18 | 18 | 19 |
| April | May | June | |
| Quick-fried spray ratio (ppm) | 8 | 8 | 6 |
Embodiment
The method for detecting short circuit of a kind of non-aqueous electrolyte secondary batteries of the present invention, it may further comprise the steps: that adopts that the test of high voltage direct current internal resistance test device made does not annotate electrolytic solution and fully is cooled to the secondary battery pole group of normal temperature after the oven dry, test voltage is set in 100～500V, internal resistance is lower than 1G Ω is considered as short circuit, reject, transfer waste product to; Again the qualified secondary battery pole group after the rapid detection of previous step is adopted the test of ac voltage withstanding tester again, test voltage is set at 100～300V, alarm current is set at 0.01-10mA, battery beyond this scope is considered as short circuit, reject, transfer waste product to, carry out battery pre-charging at last, the finished product battery is made in charging and aftertreatment.Preferred alarm current is set at 0.2-1mA, makes detection more accurate like this.
Ultimate principle of the present invention is to quicken the formation that inside battery micropore and particle pierce through by the mode of reinforcing stimulus, thus the sort out short circuit battery.
In the DC break down voltage experiment, the Electric Field Distribution of each medium of inside battery is the specific insulation distribution by medium, and when ac voltage withstanding was tested, the electric field of medium was the specific inductive capacity distribution by medium.And concentrate on battery phase border contact interface impurity and adhere to the place, these places often are difficult for puncturing in the high direct voltage process; Be in and can not puncture under the interchange condition and dc breakdown takes place, in the test of direct current high resistance, the weak defect area ＂ of the ＂ of battery diaphragm part becomes ＂ conductive region ＂ easily rapidly, and under ac voltage withstanding, can also keep suitable withstand voltage and continue for some time, when its reason is high direct voltage, have electronics and flow into polymeric media inside, form space charge, make this place easily breakdown.For above-mentioned reasons, high direct voltage resistance detects to detect with ac voltage withstanding and combines and could more all sidedly short circuit battery be detected.The present invention has used for reference the means of testing of safety detection in the electromagnetism engineering science, has proposed the secondary cell short circuit test method that adopts test of high voltage direct current resistance and the test of AC ac voltage withstanding to combine.
High voltage direct current internal resistance method of testing of the present invention, can adopt following model device (including, but are not limited to): TH2681, TH2683, Metrel MI2123, Japan stand 3313. altogether
Ac voltage withstanding method of testing of the present invention can adopt following model device (including, but are not limited to): Ai Nuo AN9601, Ai Nuo AN9632H, JK2671A, HIOKI3158.
Embodiment 1 implements by following process for one group of liquid square 043048AH (capacity is 700mAh) battery:
That adopts at first that high voltage direct current internal resistance test device test made does not annotate electrolytic solution and fully is cooled to the secondary battery pole group of normal temperature after the oven dry, and test voltage is set in 200V, internal resistance is lower than 1G Ω is considered as short circuit, rejects, and transfers waste product to; Carry out the test of ac voltage withstanding tester, test voltage is set at 100V, and the upper limit current of reporting to the police is set at 2mA, and lower current is set at 0.1mA, and the battery beyond this scope is considered as short circuit, rejects, and transfers waste product to; Carry out battery pre-charging, the finished product battery is made in charging and aftertreatment.Detecting short circuit number percent is 0.48%.
Embodiment 2 implements by following process for one group of liquid square 053450AD (capacity is 910mAh) battery:
That adopts at first that high voltage direct current internal resistance test device test made does not annotate electrolytic solution and fully is cooled to the secondary battery pole group of normal temperature after the oven dry, and test voltage is set in 500V, internal resistance is lower than 1G Ω is considered as short circuit, rejects, and transfers waste product to; Carry out the test of ac voltage withstanding tester, test voltage is set at 200V, and the upper limit current of reporting to the police is set at 10mA, and lower current is set at 0.2mA, and the battery beyond this scope is considered as short circuit, rejects, and transfers waste product to; Carry out battery pre-charging, the finished product battery is made in charging and aftertreatment.Detecting short circuit number percent is 0.42%.
Embodiment 3 implements by following process for one group of liquid square 383450AC (capacity is 660mAh) battery:
That adopts at first that high voltage direct current internal resistance test device test made does not annotate electrolytic solution and fully is cooled to the secondary battery pole group of normal temperature after the oven dry, and test voltage is set in 100V, internal resistance is lower than 1G Ω is considered as short circuit, rejects, and transfers waste product to; Carry out the test of ac voltage withstanding tester, test voltage is set at 300V, and the upper limit current of reporting to the police is set at 1mA, and lower current is set at 0.01mA, and the battery beyond this scope is considered as short circuit, rejects, and transfers waste product to; Carry out battery pre-charging, the finished product battery is made in charging and aftertreatment.Detecting short circuit number percent is 0.39%.
Claims (2)
1. the method for detecting short circuit of a non-aqueous electrolyte secondary batteries is characterized in that it may further comprise the steps:
That (1) adopts that the test of high voltage direct current internal resistance test device made does not annotate electrolytic solution and fully is cooled to the secondary battery pole group of normal temperature after the oven dry, and test voltage is set in 100～500V, internal resistance is lower than 1G Ω is considered as short circuit, rejects, and transfers waste product to;
(2) test through the ac voltage withstanding tester for the qualified secondary battery pole group after detecting through step (1), test voltage is set at 100～300V, and alarm current is set at 0.01-10mA again, and the battery beyond this scope is considered as short circuit, rejects, and transfers waste product to.
2. the method for detecting short circuit of non-aqueous electrolyte secondary batteries according to claim 1 is characterized in that the alarm current in the described step (2) is set at 0.2-1mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100156778A CN100465654C (en) | 2006-09-15 | 2006-09-15 | Method for detecting short circuit of non-aqueous electrolyte secondary batteries |
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| CNB2006100156778A CN100465654C (en) | 2006-09-15 | 2006-09-15 | Method for detecting short circuit of non-aqueous electrolyte secondary batteries |
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| CN1924598A CN1924598A (en) | 2007-03-07 |
| CN100465654C true CN100465654C (en) | 2009-03-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108196155A (en) * | 2017-12-25 | 2018-06-22 | 桑德集团有限公司 | It is a kind of for detect battery roll core whether short circuit method |
| 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 |
| CN110729516B (en) * | 2019-11-12 | 2020-10-27 | 昆山聚创新能源科技有限公司 | Micro-short circuit test method of lithium ion battery |
| CN112462218B (en) * | 2020-11-10 | 2023-06-02 | 珠海冠宇电池股份有限公司 | Cell pressurization tool, cell withstand voltage test device and withstand voltage test method |
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| US4678998A (en) * | 1985-01-25 | 1987-07-07 | Nissan Motor Company, Limited | Battery condition monitor and monitoring method |
| CN1203368A (en) * | 1997-06-24 | 1998-12-30 | 松下电器产业株式会社 | Method for detecting working condition of non-aqueous electrolyte secondary batterles |
| JP2000030763A (en) * | 1998-07-13 | 2000-01-28 | Mitsubishi Chemicals Corp | Short circuit inspecting method for secondary battery and manufacture of secondary battery including same inspecting method |
| JP2000223164A (en) * | 1999-01-29 | 2000-08-11 | Ntt Docomo Inc | Battery pack, and method and device for diagnosing capacity deterioration of same battery pack |
| JP2000294292A (en) * | 1999-04-06 | 2000-10-20 | Japan Storage Battery Co Ltd | Nonaqueous electrolyte battery and design method therefor |
| JP3196071B2 (en) * | 1997-07-18 | 2001-08-06 | 古河電池株式会社 | Short-circuit inspection method for alkaline secondary batteries |
| CN1340874A (en) * | 2000-05-23 | 2002-03-20 | 佳能株式会社 | Detecting method for internal state of rechargeable battery, device and equipment with said device |
| JP2003045500A (en) * | 2001-07-26 | 2003-02-14 | Matsushita Electric Ind Co Ltd | Method and device for inspecting battery |
| JP2003317810A (en) * | 2002-04-18 | 2003-11-07 | Toyota Motor Corp | Battery characteristics estimation method |
| JP2004087412A (en) * | 2002-08-29 | 2004-03-18 | Shin Kobe Electric Mach Co Ltd | Inspection method and inspection device of lead storage battery |
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2006
- 2006-09-15 CN CNB2006100156778A patent/CN100465654C/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4678998A (en) * | 1985-01-25 | 1987-07-07 | Nissan Motor Company, Limited | Battery condition monitor and monitoring method |
| CN1203368A (en) * | 1997-06-24 | 1998-12-30 | 松下电器产业株式会社 | Method for detecting working condition of non-aqueous electrolyte secondary batterles |
| JP3196071B2 (en) * | 1997-07-18 | 2001-08-06 | 古河電池株式会社 | Short-circuit inspection method for alkaline secondary batteries |
| JP2000030763A (en) * | 1998-07-13 | 2000-01-28 | Mitsubishi Chemicals Corp | Short circuit inspecting method for secondary battery and manufacture of secondary battery including same inspecting method |
| JP2000223164A (en) * | 1999-01-29 | 2000-08-11 | Ntt Docomo Inc | Battery pack, and method and device for diagnosing capacity deterioration of same battery pack |
| JP2000294292A (en) * | 1999-04-06 | 2000-10-20 | Japan Storage Battery Co Ltd | Nonaqueous electrolyte battery and design method therefor |
| CN1340874A (en) * | 2000-05-23 | 2002-03-20 | 佳能株式会社 | Detecting method for internal state of rechargeable battery, device and equipment with said device |
| JP2003045500A (en) * | 2001-07-26 | 2003-02-14 | Matsushita Electric Ind Co Ltd | Method and device for inspecting battery |
| JP2003317810A (en) * | 2002-04-18 | 2003-11-07 | Toyota Motor Corp | Battery characteristics estimation method |
| JP2004087412A (en) * | 2002-08-29 | 2004-03-18 | Shin Kobe Electric Mach Co Ltd | Inspection method and inspection device of lead storage battery |
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