CN103149488A - Battery defect test method and battery defect test device - Google Patents
Battery defect test method and battery defect test device Download PDFInfo
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- CN103149488A CN103149488A CN2011103990048A CN201110399004A CN103149488A CN 103149488 A CN103149488 A CN 103149488A CN 2011103990048 A CN2011103990048 A CN 2011103990048A CN 201110399004 A CN201110399004 A CN 201110399004A CN 103149488 A CN103149488 A CN 103149488A
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Abstract
The invention relates to a battery defect test method and a battery defect test device which comprises a controller C, a current source D, a sampling circuit L and a battery B. The controller C controls the current source D to charge the battery B. A voltage and current of the battery B are acquired through the sampling circuit L. A battery charged capacity is computed according to the current and a charging time. The charged battery capacity is recorded as a battery constant flow stage capacity when the battery voltage is detected to reach a rated voltage, namely that the battery current starts declining. Charging is performed continuously, and a total charged capacity is recorded when the current declines to be 10% of initial current. The fact that whether the battery has defect is evaluated according to the battery constant flow stage capacity and the total charged capacity with the battery defect test method.
Description
Technical field
The present invention relates to a kind of battery defect method of testing and device, belong to battery detecting and application.
Background technology
Popularization and application along with battery, some defectives of battery are also recognized by people gradually, a large amount of serious consequences that cause due to the battery self problem, make people begin to pay attention to the judgement in advance of battery defect, how earlier, know more accurately the defective of battery, take corresponding measure, avoiding causing damage to property and personal injury, is the thing that battery industry is extremely paid close attention to.
We know, it is easily to cause serious consequence that battery has two defectives, and one is the battery micro-short circuit, and another is that the internal resistance of cell is too high, and these two defectives just may cause battery-heating in careless situation, even blast.
It is large that the battery micro-short circuit just can show as self-discharge of battery in the early stage, capacity is low, if but after long-time the use, micro-short circuit may form more large-area short trouble, the rapid overcurrent of inside battery, it is the space of a sealing due to battery, overcurrent produces a large amount of chemical gas rapidly, the battery temperature fast lifting, very easily blast, now the method for conventional detection battery micro-short circuit is to detect by the pressure drop of shelving after month, yet that this method implements is very difficult, and test also only is confined in theory.
cause the reason of the high internal resistance of lithium ion battery a lot, concrete reason has: negative plate and lug rosin joint, positive plate and lug rosin joint, anode ear and block rosin joint, negative electrode lug and shell rosin joint, rivet contacts internal resistance with pressing plate large etc., the internal resistance of cell no matter which kind of reason produces is too high, when an important consequence is all the work of battery, when electric current flows through from battery, can produce heat energy in internal resistance, high internal resistance certainly leads to high heat energy, result causes the battery temperature rise too fast, inner pressure of battery raises, easily blast, the detection of lithium ion battery internal resistance can be tested in the production phase, if also can cause high internal resistance yet some battery in the later stage, super-charge super-discharge occurs, at present general user can not prepare the equipment of a detection internal resistance of cell.
The present invention pays close attention to the defective of lithium ion battery just, proposes a kind of method of testing of battery defect, recommends simultaneously a kind of battery defect proving installation.
Summary of the invention
Key in herein summary of the invention and describe paragraph.The present invention is intended to invent a kind of battery defect method of testing and device, by the monitoring to the lithium ion cell charging process, and a kind of method of judgement lithium ion battery defective.
For realizing above-mentioned purpose, the present invention adopts following scheme:
The present invention proposes a kind of proving installation of battery defect, comprises controller C, current source D, sample circuit L, battery B; See accompanying drawing 1.
At first test philosophy of the present invention below is described, and then introduces the course of work of the present invention:
The standard charging curve of lithium ion battery such as accompanying drawing 2, generally be divided into constant-current phase charging and constant-voltage phase charging, in these two charging stages, early stage, electric current was larger, and voltage rises, after cell voltage reaches specified charging voltage, change constant-voltage charge into, keep voltage constant, electric current begins to descend, when electric current drops to 10% left and right of electric current in early stage, can think that the battery charging is complete.
confirm through a large amount of scientific experiments and theoretical research, the lithium ion battery of same process is roughly the same in the battery capacity that the constant-current phase charging obtains, but when there is defective in this battery, performance is just different, wherein, when there is the micro-short circuit defective in battery, the self discharge that causes due to micro-short circuit is larger, battery could be charged to rated voltage with cell voltage in the needs longer time in constant-current charge stage, result causes the constant-current phase capacity bigger than normal, and when there is the high defective of internal resistance in battery, the pressure drop that causes due to battery self internal resistance is larger, still less the time just can be charged to rated voltage with cell voltage to the needs of battery in the charging stage, result causes the constant-current phase capacity less than normal, comprehensive above the analysis, we propose the method for test battery defective of the present invention, judge with the ratio of charging total volume whether battery exists the method for defective according to the capacity of battery charging process constant-current phase.
According to the situation of reality, also can according to battery reach rated voltage time and the charging judge whether battery exists defective T.T..
According to the condition of reality, also can replace current source D in accompanying drawing 1 of the present invention with daily battery charger.
Below in conjunction with accompanying drawing 1, the course of work of the present invention is described:
Controller C controls current source D, B charges to battery, and gather the voltage and current of battery B by sample circuit L, be filled with capacity according to electric current and duration of charging calculating battery, detect cell voltage and arrive rated voltage, when namely battery current begins to descend, the battery capacity that has been filled with is recorded as battery constant-current phase capacity, continue charging, when electric current drop to initial current 10% the time, record total charging capacity, according to battery constant-current phase capacity and total charging capacity, according to determination methods provided by the invention, whether battery is existed defective evaluation.
Method of the present invention also can be in the process of daily observation charger to the battery charging, and the time and the charger indication complete time of charging that arrive rated voltage by monitoring and record cell voltage judge whether battery exists defective.
Beneficial effect of the present invention:
(1) major defect that battery is existed is measured in advance, is conducive to timely processing, avoids causing major accident.
(2) method of testing is simply effective, and Fast Practical is fit to battery production enterprise and uses, and also is fit to battery user and uses.
Description of drawings:
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is lithium ion battery standard charging curve synoptic diagrams.
Embodiment:
In order to make technical scheme of the present invention clearer, below in conjunction with drawings and Examples, the present invention is described in more detail, and instantiation described herein only in order to explain the present invention, is not limited to the present invention.
Embodiment 1:
(1) prepare the battery of a collection of identical production technology, the device that the present invention proposes;
(2) battery is placed on device charges, and pen recorder the constant-current charge capacity and the total volume that show;
(3) according to statistical Normal Distribution Theory, count the constant-current charge capacity of this batch technique battery and the standard proportional of total volume;
(4) will not be inconsistent battery according to standard proportional and pick out, and can select wherein to do to dissect and decompose, with problem identificatioin and solution.
Embodiment 2:
(1) prepare battery of mobile phone and the charger for mobile phone of " without an electricity " state, multimeter, above " without electricity " state refers to the mobile phone pilot cell without electricity, rather than cell voltage is 0 state;
(2) battery is placed on charger for mobile phone, the voltage test pencil of multimeter is connect positive pole and the negative pole of battery;
(3) charger for mobile phone is received on power supply, begun charging, the record start duration of charging;
(4) when multimeter pilot cell voltage arrives 4.2V, in the time interval of record and initiation of charge time, be the constant-current phase duration of charging;
(5) when the charging of charger for mobile phone pilot cell is complete, in the time interval of record and initiation of charge time, be charging T.T.;
(6) can with reference to initial state of charge, judge whether battery exists extremely.
Claims (3)
1. a battery defect method of testing and device, comprise controller C, current source D, sample circuit L, battery B, it is characterized in that: controller C controls current source D, B charges to battery, and gather the voltage and current of battery B by sample circuit L, be filled with capacity according to electric current and duration of charging calculating battery, detect cell voltage and arrive rated voltage, when namely battery current begins to descend, the battery capacity that has been filled with is recorded as battery constant-current phase capacity, continue charging, when electric current drop to initial current 10% the time, record total charging capacity, according to battery constant-current phase capacity and total charging capacity, whether the determination methods that provides according to the utility model exists defective evaluation to battery.
2. a kind of battery defect method of testing according to claim 1 and device, is characterized in that: propose a kind of method that judges battery defect, judge according to capacity and the ratio of charging total volume of battery charging process constant-current phase whether battery exists defective.
3. a kind of battery defect method of testing according to claim 1 and device is characterized in that: can judge whether battery exists defective T.T. according to time and the charging that battery reach rated voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103990048A CN103149488A (en) | 2011-12-06 | 2011-12-06 | Battery defect test method and battery defect test device |
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| CN2011103990048A CN103149488A (en) | 2011-12-06 | 2011-12-06 | Battery defect test method and battery defect test device |
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| CN103149488A true CN103149488A (en) | 2013-06-12 |
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| CN2011103990048A Pending CN103149488A (en) | 2011-12-06 | 2011-12-06 | Battery defect test method and battery defect test device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837581A (en) * | 2014-03-17 | 2014-06-04 | 中国科学院电工研究所 | Detection device for lithium ion battery |
| CN108008313A (en) * | 2017-11-29 | 2018-05-08 | 东莞市创明电池技术有限公司 | The screening technique of lithium ion battery self discharge |
| CN108020788A (en) * | 2017-10-27 | 2018-05-11 | 合肥国轩高科动力能源有限公司 | Method for rapidly screening internal resistance of lithium ion battery |
| CN111722129A (en) * | 2020-06-01 | 2020-09-29 | 国联汽车动力电池研究院有限责任公司 | Battery micro short circuit detection method and system |
| CN115178501A (en) * | 2022-07-12 | 2022-10-14 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Screening method of high-reliability solid electrolyte tantalum capacitor |
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| CN102231548A (en) * | 2011-07-04 | 2011-11-02 | 上海工程技术大学 | Battery charging device with dynamic capacity-display and charge countdown functions and application thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837581A (en) * | 2014-03-17 | 2014-06-04 | 中国科学院电工研究所 | Detection device for lithium ion battery |
| CN103837581B (en) * | 2014-03-17 | 2016-03-23 | 中国科学院电工研究所 | A kind of lithium ion battery pick-up unit |
| CN108020788A (en) * | 2017-10-27 | 2018-05-11 | 合肥国轩高科动力能源有限公司 | Method for rapidly screening internal resistance of lithium ion battery |
| CN108008313A (en) * | 2017-11-29 | 2018-05-08 | 东莞市创明电池技术有限公司 | The screening technique of lithium ion battery self discharge |
| CN111722129A (en) * | 2020-06-01 | 2020-09-29 | 国联汽车动力电池研究院有限责任公司 | Battery micro short circuit detection method and system |
| CN111722129B (en) * | 2020-06-01 | 2023-08-15 | 国联汽车动力电池研究院有限责任公司 | Battery micro-short circuit detection method and system |
| CN115178501A (en) * | 2022-07-12 | 2022-10-14 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Screening method of high-reliability solid electrolyte tantalum capacitor |
| CN115178501B (en) * | 2022-07-12 | 2024-08-27 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Screening method of high-reliability solid electrolyte tantalum capacitor |
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Application publication date: 20130612 |