CN105911410A - Detection method for micro short circuit between positive electrode and negative electrode of battery - Google Patents
Detection method for micro short circuit between positive electrode and negative electrode of battery Download PDFInfo
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- CN105911410A CN105911410A CN201610234736.4A CN201610234736A CN105911410A CN 105911410 A CN105911410 A CN 105911410A CN 201610234736 A CN201610234736 A CN 201610234736A CN 105911410 A CN105911410 A CN 105911410A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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Abstract
The invention relates to a detection method for a micro short circuit between a positive electrode and a negative electrode of a battery. The method comprises: a battery that has a certain nominal capacity, has been welded and has not been processed by electrolyte injection is selected; a threshold value in a normal capacitance range between a positive electrode and a negative electrode is determined; a capacitance value between the positive electrode and the negative electrode of the battery is tested and whether the capacitance value is in a threshold value range is determined; if so, the following steps are executed for testing; and if not, the battery is determined to be a short-circuit battery; and if the capacitance value is in the threshold value range, charging testing is carried out between the positive electrode and the negative electrode of the battery; if the capacitance value between the positive electrode and the negative electrode of the single battery is in a fluctuating range, the battery is determined as a qualified battery; and if the capacitance value is beyond the fluctuating range, the battery is determined to be a short-circuit battery. According to the invention, the capacitance change during the charging process is detected and thus an instantaneous abnormal phenomenon of the battery in an internal micro short-circuit mode during the testing process can be captured effectively, thereby improving the detection number of batteries with micro short-circuit between the positive and negative electrodes substantially.
Description
Technical field
The present invention relates to battery detecting technical field, be specifically related to the detection method of micro-short circuit between a kind of battery plus-negative plate.
Background technology
The detection of battery micro-short circuit always restricts the key factor of battery, diversity and complexity due to battery pole piece and membrane contacts mode, cause a lot of barrier film that micro-damage occurs to be difficult to effectively detect by traditional voltage-withstand test or pulse test, the amplitude of leakage rate and voltage decline that the most conventional means of testing mainly investigates electric current in charging process converts, the insulating capacity of battery is investigated with this, the change that inside battery in test process is occurred by said method cannot catch immediately, the most substantially belonging to a kind of relies on static parameter to judge the process dynamically changed, it is difficult to having occurred and that the battery of the internal micro-short circuit condition of instant error in test process effectively catches.
Battery is carrying out between injecting electrolytic solution, substantially belong to a kind of capacitive load, possessing certain capacitance, its capacitance is to be directly proportional to by the dielectric constant of the dielectric between both positive and negative polarity pole piece and the area of both positive and negative polarity pole piece, and the distance between both positive and negative polarity pole piece is inversely proportional to.Owing to for the battery of certain model, the area of pole piece is fixing, therefore affect electric capacity is dielectric constant and the distance of pole piece of barrier film, when having micro-damage or pole piece jagged on barrier film, battery capacitor can be caused significantly to differ from the most normal battery, in the electric current moment by inside battery, once puncture barrier film or burn the situation of burr, dielectric constant and pole piece distance change can be immediately leaded to, in turn result in the fluctuation of electric capacity, therefore electric capacity uniformity in test process between battery plus-negative plate is investigated, the recall rate of micro-short circuit battery can be greatly improved.
Summary of the invention
It is an object of the invention to provide the detection method of micro-short circuit between a kind of battery plus-negative plate, the method judges the micro-short circuit situation occurred between battery plus-negative plate by detection electric capacity uniformity, the recall rate of micro-short circuit battery can be improve to having occurred and that the battery of the internal micro-short circuit condition of instant error in test process effectively catches.
For achieving the above object, present invention employs techniques below scheme:
The detection method of micro-short circuit between a kind of battery plus-negative plate, comprises the following steps:
(1) choose have certain nominal capacity and be complete welding but not yet carry out the battery of injecting electrolytic solution；
(2) threshold values of electric capacity normal range (NR) between battery plus-negative plate corresponding under described nominal capacity is determined；
(3) capacitance between test battery plus-negative plate, it is judged that whether this capacitance is in described threshold values；
(4) if described capacitance is in threshold values, then follow the steps below test, if described capacitance is in outside threshold values, the most directly judge that battery is short circuit battery；
(5) if described capacitance is in threshold values, then with certain voltage, within the testing time to be charged between battery plus-negative plate test: in charging interval section at regular intervals interval test battery plus-negative plate between capacitance；
(6) if the capacitance between single battery both positive and negative polarity is in fluctuation range, then battery is spec battery, if described capacitance is outside fluctuation range, then battery is short circuit battery.
The detection method of micro-short circuit between described battery plus-negative plate, in step (1), described nominal capacity is 13～22Ah.
The detection method of micro-short circuit between described battery plus-negative plate, in step (2), described threshold values is 220～550nF.
The detection method of micro-short circuit between described battery plus-negative plate, in step (5), described voltage is 50～250V, and the described testing time is 1～10 wonderful, and described time interval is 10～100 milliseconds.
The detection method of micro-short circuit between described battery plus-negative plate, in step (6), described fluctuation range is between ± 5%～± 10%.
As shown from the above technical solution, the present invention is by the change of electric capacity in detection charging process, can be to having occurred and that the battery of the internal micro-short circuit condition of instant error in test process effectively catches, substantially increase the detection quantity of the battery that micro-short circuit occurs between both positive and negative polarity, obtain a kind of parameter that can evaluate battery dynamic changing process in charging process simultaneously.
Accompanying drawing explanation
Fig. 1 be short circuit battery of the present invention both positive and negative polarity between electric capacity wave pattern in 1 second；
Fig. 2 be normal battery of the present invention both positive and negative polarity between electric capacity wave pattern in 1 second.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings:
Embodiment 1
(1) choosing 100, the battery that nominal capacity is 13Ah, laser welding is molded；
(2) determine that the capacitance threshold value between the both positive and negative polarity of normal range (NR) is 220～250nF；
(3) capacitance between test battery plus-negative plate, it is judged that whether this capacitance is in described threshold values；(4) if described capacitance is in threshold values, then follow the steps below test, if described capacitance is in outside threshold values, the most directly judge that battery is short circuit battery；
(5) if described capacitance is in threshold values, then under 50V voltage, it is charged test, 1 second testing time, in 1 second, tests capacitance between both positive and negative polarity every 10 milliseconds；
(6) if the capacitance fluctuation range between the both positive and negative polarity in single battery test process within ± 10% for test passes battery, be otherwise short circuit battery.
Embodiment 2
(1) choosing 100, the battery that nominal capacity is 22Ah, laser welding is molded；
(2) determine that the capacitance threshold value between the both positive and negative polarity of normal range (NR) is 450～550nF；
(3) capacitance between test battery plus-negative plate, it is judged that whether this capacitance is in described threshold values；(4) if described capacitance is in threshold values, then follow the steps below test, if described capacitance is in outside threshold values, the most directly judge that battery is short circuit battery；
(5) if described capacitance is in threshold values, then under 250V voltage, it is charged test, 10 seconds testing times, in 10 seconds, tests capacitance between both positive and negative polarity every 100 milliseconds；
(6) if the capacitance fluctuation range between the both positive and negative polarity in single battery test process within ± 5% for test passes battery, be otherwise short circuit battery.
Embodiment 3
(1) choosing 100, the battery that nominal capacity is 21Ah, laser welding is molded；
(2) determine that the capacitance threshold value between the both positive and negative polarity of normal range (NR) is 350～400nF；
(3) capacitance between test battery plus-negative plate, it is judged that whether this capacitance is in described threshold values；(4) if described capacitance is in threshold values, then follow the steps below test, if described capacitance is in outside threshold values, the most directly judge that battery is short circuit battery；
(5) if described capacitance is in threshold values, then under 175V voltage, it is charged test, 6 seconds testing times, in 6 seconds, tests capacitance between both positive and negative polarity every 50 milliseconds；
(6) if the capacitance fluctuation range between the both positive and negative polarity in single battery test process within ± 7% for test passes battery, be otherwise short circuit battery.
Fig. 1, Fig. 2 are respectively in embodiment 1 electric capacity wave pattern in 1 second between micro-short circuit battery and the both positive and negative polarity of normal battery.
Fig. 1 shows the battery for occurring micro-short circuit between inside battery both positive and negative polarity, in the middle of the process of charging measurement, carries out capacity measurement every certain time interval, and electric capacity is unstable, occurs in that fluctuation clearly.
Fig. 2 shows the battery for not occurring micro-short circuit between inside battery both positive and negative polarity, in the middle of the process of charging measurement, carries out capacity measurement every certain time interval, and electric capacity is stable, does not the most fluctuate.
Embodiment described above is only to be described the preferred embodiment of the present invention; not the scope of the present invention is defined; on the premise of designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (7)
1. the detection method of micro-short circuit between a battery plus-negative plate, it is characterised in that comprise the following steps:
(1) choose have certain nominal capacity and be complete welding but not yet carry out the battery of injecting electrolytic solution；
(2) threshold values of electric capacity normal range (NR) between battery plus-negative plate corresponding under described nominal capacity is determined；
(3) capacitance between test battery plus-negative plate, it is judged that whether this capacitance is in described threshold values；
(4) if described capacitance is in threshold values, then follow the steps below test, if described capacitance is in outside threshold values, the most directly judge that battery is short circuit battery；
(5) if described capacitance is in threshold values, then with certain voltage, within the testing time to be charged between battery plus-negative plate test: in charging interval section at regular intervals interval test battery plus-negative plate between capacitance；
(6) if the capacitance between single battery both positive and negative polarity is in fluctuation range, then battery is spec battery, if described capacitance is outside fluctuation range, then battery is short circuit battery.
The detection method of micro-short circuit between battery plus-negative plate the most according to claim 1, it is characterised in that in step (1), described nominal capacity is 13～22Ah.
The detection method of micro-short circuit between battery plus-negative plate the most according to claim 1, it is characterised in that in step (2), described threshold values is 220～550nF.
The detection method of micro-short circuit between battery plus-negative plate the most according to claim 1, it is characterised in that in step (5), described voltage is 50～250V.
The detection method of micro-short circuit between battery plus-negative plate the most according to claim 1, it is characterised in that in step (5), the described testing time is 1～10 wonderful.
The detection method of micro-short circuit between battery plus-negative plate the most according to claim 1, it is characterised in that in step (5), described time interval is 10～100 milliseconds.
The detection method of micro-short circuit between battery plus-negative plate the most according to claim 1, it is characterised in that in step (6), described fluctuation range is between ± 5%～± 10%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610234736.4A CN105911410A (en) | 2016-04-14 | 2016-04-14 | Detection method for micro short circuit between positive electrode and negative electrode of battery |
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| CN201610234736.4A CN105911410A (en) | 2016-04-14 | 2016-04-14 | Detection method for micro short circuit between positive electrode and negative electrode of battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924873A (en) * | 2021-02-04 | 2021-06-08 | 上海玫克生储能科技有限公司 | Online diagnosis method and system for micro short circuit of battery pack |
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| JPH07333303A (en) * | 1994-06-07 | 1995-12-22 | Sony Corp | Method and device for inspecting short-circuit of battery element |
| CN201623512U (en) * | 2010-01-26 | 2010-11-03 | 深圳市倍特力电池有限公司 | Battery micro-short circuit repair device |
| CN102243284A (en) * | 2011-04-07 | 2011-11-16 | 深圳市量能科技有限公司 | Method for detecting micro-short-circuit of wound type battery |
| JP2014041834A (en) * | 2008-02-27 | 2014-03-06 | Nec Corp | Internal short circuit detection device and internal short circuit detection method for secondary battery |
| CN104617330A (en) * | 2015-01-19 | 2015-05-13 | 清华大学 | Recognition method of micro-short circuiting of batteries |
-
2016
- 2016-04-14 CN CN201610234736.4A patent/CN105911410A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07333303A (en) * | 1994-06-07 | 1995-12-22 | Sony Corp | Method and device for inspecting short-circuit of battery element |
| JP2014041834A (en) * | 2008-02-27 | 2014-03-06 | Nec Corp | Internal short circuit detection device and internal short circuit detection method for secondary battery |
| CN201623512U (en) * | 2010-01-26 | 2010-11-03 | 深圳市倍特力电池有限公司 | Battery micro-short circuit repair device |
| CN102243284A (en) * | 2011-04-07 | 2011-11-16 | 深圳市量能科技有限公司 | Method for detecting micro-short-circuit of wound type battery |
| CN104617330A (en) * | 2015-01-19 | 2015-05-13 | 清华大学 | Recognition method of micro-short circuiting of batteries |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924873A (en) * | 2021-02-04 | 2021-06-08 | 上海玫克生储能科技有限公司 | Online diagnosis method and system for micro short circuit of battery pack |
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