CN106249162A - A kind of method and apparatus testing self-discharge of battery - Google Patents
A kind of method and apparatus testing self-discharge of battery Download PDFInfo
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- CN106249162A CN106249162A CN201610677371.2A CN201610677371A CN106249162A CN 106249162 A CN106249162 A CN 106249162A CN 201610677371 A CN201610677371 A CN 201610677371A CN 106249162 A CN106249162 A CN 106249162A
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- mesuring battary
- resistance
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- battery
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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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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Abstract
The invention discloses a kind of method and apparatus testing self-discharge of battery, this method of testing includes mesuring battary is refrigerated to electrolyte solidification；Measure the resistance of described mesuring battary to obtain measuring resistance value；Judge that whether described measurement resistance value is more than insulation resistance threshold value；If judged result is for being more than, then it is judged as that the self discharge situation of described mesuring battary meets the requirements, is otherwise judged as undesirable.By said method, the present invention can test out the self discharge situation of battery at short notice, significantly shorten the testing time, reaches quickly to test the purpose of self-discharge of battery.
Description
Technical field
The present invention relates to field of batteries, particularly relate to a kind of method and apparatus testing self-discharge of battery.
Background technology
Self discharge is the intrinsic phenomenon of lithium ion battery, and generally, the self discharge of battery is very slow, the shadow to battery
Sound can be ignored.But, when inside battery occurs micro-short circuit due to dust, burr, metallic particles etc., the self discharge of battery is just
Can become big, thus shorten the stand-by time of equipment using this battery, affect user's experience, even result in battery and cross and put,
Tympanites lost efficacy.Therefore, for battery that self discharge is bigger, it is necessary to choose through screening.
The method of detection self discharge at present mainly has K value method and CV method.K value method is that under certain voltage, battery is shelved one
The section time, calculate this voltage drop-out value shelving the unit interval in the time, weigh according to the voltage drop-out value of this unit interval
The size of amount self-discharge of battery.In order to ensure degree of accuracy, the method time of shelving can not be the shortest, typically more than 48 hours, this
Also the method detection cycle is allowed for the longest.CV method refers to, by battery continuous and constant pressure charging under certain voltage, work as charging current
After reaching steady statue, weigh the size of self-discharge of battery according to the size of this charging current value.Compared with K value method, CV value
Method required time is greatly shortened.While it is true, its detection cycle still needs about 2 hours, and to equipment precision requirement very
High.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of method and apparatus testing self-discharge of battery, it is possible to solve
The problem of existing method of testing detection cycle length.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide one test self-discharge of battery
Method, including:
Mesuring battary is refrigerated to electrolyte solidification；
Measure the resistance of described mesuring battary to obtain measuring resistance value；
Judge that whether described measurement resistance value is more than insulation resistance threshold value；
If judged result is for being more than, then it is judged as that the self discharge situation of described mesuring battary meets the requirements, is otherwise judged as
Undesirable.
Wherein, described mesuring battary is refrigerated to electrolyte solidification before, including: by charge or discharge by described to be measured
The Voltage Cortrol of examination battery is in preset range.
Wherein, the resistance of the described mesuring battary of described measurement includes to obtain measurement resistance value:
Confirm whether the voltage of described mesuring battary has dropped down to 0 volt；
If having dropped down to 0 volt, then put on the test voltage less than 50 volts and treat described in the measurement of described mesuring battary both positive and negative polarity
Survey the resistance of battery.
Wherein, the testing time of the resistance of the described mesuring battary of described measurement was set to less than 10 seconds.
Wherein, described insulation resistance threshold value is 1 megaohm.
For solving above-mentioned technical problem, another technical solution used in the present invention is: provide one test battery from putting
The equipment of electricity, including:
Cryoprobe, for being refrigerated to electrolyte solidification by mesuring battary；
Measuring circuit, for measuring the resistance of described mesuring battary to obtain measuring resistance value；
Decision circuitry, is used for judging that whether described measurement resistance value is more than insulation resistance threshold value；
Output circuit, for judged result be more than time, the self discharge situation exporting described mesuring battary meets the requirements
Measurement result, otherwise export the undesirable measurement result of self discharge situation of described mesuring battary.
Wherein, the equipment of described test self-discharge of battery farther includes charge-discharge circuit, for mesuring battary is freezing
Before solidifying to electrolyte, by charge or discharge by the Voltage Cortrol of described battery to be tested to preset range.
Wherein, described measuring circuit specifically for:
Confirm whether the voltage of described mesuring battary has dropped down to 0 volt；
If having dropped down to 0 volt, then put on the test voltage less than 50 volts and treat described in the measurement of described mesuring battary both positive and negative polarity
Survey the resistance of battery.
Wherein, the testing time of the resistance of the described mesuring battary of described measurement was set to less than 10 seconds.
Wherein, described insulation resistance threshold value is 1 megaohm.
The invention has the beneficial effects as follows: be different from the situation of prior art, the present invention provides a kind of test self-discharge of battery
Method and apparatus, measure its resistance value after being solidified by freezing mesuring battary to electrolyte, if described resistance value is more than insulation
Resistance threshold, then be judged to that mesuring battary self discharge situation meets the requirements, otherwise the most undesirable.Owing to electrolyte is solidified
Required time the shortest, resistance test required time is the shortest, and therefore, by this method, the present invention can significantly shorten survey
The examination time, reach quickly to test the purpose of self-discharge of battery.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention tests method one embodiment of self-discharge of battery；
Fig. 2 is the flow chart that the present invention tests another embodiment of method of self-discharge of battery；
Fig. 3 is the schematic diagram that the present invention tests equipment one embodiment of self-discharge of battery；
Fig. 4 is the schematic diagram that the present invention tests another embodiment of equipment of self-discharge of battery.
Detailed description of the invention
For making those skilled in the art be more fully understood that technical scheme, below in conjunction with the accompanying drawings and be embodied as
A kind of method and apparatus testing self-discharge of battery provided by the present invention is described in further detail by mode.
Under normal circumstances, being electronic isolation between positive pole and the negative pole of battery, its insulation resistance is the biggest.When battery just
When there is the positive pole of micro-short circuit, i.e. battery and negative pole between negative pole by conductings such as micropowder dirt, burr or metal impurities, Jiu Huicun
In a certain degree of electronic conduction, its insulation resistance can significantly reduce.Therefore, by the size of insulation resistance it may determine that electricity
Pond self discharge is the most normal.
Referring to Fig. 1, the present invention tests method one embodiment of self-discharge of battery and comprises the following steps:
S101: mesuring battary is refrigerated to electrolyte solidification；
Wherein, the electrolyte of described battery refers to conduct the medium of ion between anode and negative pole；Treat described
Survey the freezing temperature of battery and have to be lower than the freezing point of electrolyte in described mesuring battary, the freezing point of electrolyte in different batteries
It is slightly different, is not specifically limited herein.
Such as, being placed in the low temperature environment of-100 DEG C by mesuring battary, now the electrolyte in mesuring battary can be somewhat
Quick solidification in clock.
S102: measure the resistance of described mesuring battary to obtain measuring resistance value；
Wherein, step S102 farther includes:
S1021: confirm whether the voltage of described mesuring battary has dropped down to 0 volt, if having dropped down to 0 volt, carries out step S1022,
Otherwise return step S101；
S1022: put on described mesuring battary both positive and negative polarity with the test voltage less than 50 volts and measure described mesuring battary
Resistance.
Wherein, if the voltage of described mesuring battary has dropped down to 0 volt, then show that the electrolyte of described mesuring battary has coagulated
Gu, follow-up test result is just accurate, otherwise needs the most described mesuring battary voltage to drop to 0 volt and carries out subsequent step again.
If it addition, test voltage described in present embodiment sets the highest, described mesuring battary can be punctured.Such as, at one
In exemplary test scene, for the mesuring battary used by measurement, find that critical voltage is 50 volts through experiment test, preferably survey
Examination voltage is 20 volts, and the testing time of the resistance of the described mesuring battary of described measurement was set to less than 10 seconds.
For the mesuring battary of the example above, after confirming during test that the voltage of mesuring battary has been reduced to 0 volt, treat described
Surveying battery plus-negative plate and apply the unidirectional current of 20 volts, the testing time is set to 2 seconds, now can record the resistance of described mesuring battary
Value.
Certainly, the critical voltage of different mesuring battaries is different with preferred test voltage, and the present invention is not restricted.
S103: judge that whether described measurement resistance value is more than insulation resistance threshold value；If judged result is for being more than, then walk
Rapid S104, otherwise carries out step S105；
Wherein, described insulation resistance threshold value is to weigh the physical quantity of dielectric insulating properties quality, and it is numerically etc.
In the resistance value that described dielectric is had, unit is megaohm.
Specifically, described insulation resistance threshold value is 1 megaohm.
S104: be judged as that the self discharge situation of described mesuring battary meets the requirements；
S105: be otherwise judged as undesirable.
In the above-described embodiment, utilize the temperature being less than mesuring battary electrolyte freezing point that described mesuring battary is carried out
Freezing processing so that described electrolyte quick solidification, the resistance value of mesuring battary described in re-test, relatively described resistance value with absolutely
Edge resistance threshold, thus judge whether the self discharge situation of described mesuring battary meets the requirements, owing to electrolyte solidification only needs several
Minute, the resistance value testing described testing resistance the most only needs several seconds, and whole test process the most only needs a few minutes, it is possible to notable
Shorten test period, thus reach quickly to test the purpose of self-discharge of battery.
In present embodiment, directly mesuring battary is refrigerated to electrolyte solidification, as it is shown in figure 1, at other embodiments
In, can will first adjust the voltage of described mesuring battary before described mesuring battary freezing, especially need to test same group of electricity
During the self discharge situation in pond, it is necessary to by the Voltage Cortrol of described same Battery pack to same scope, test result just has reference
It is worth.
Referring to Fig. 2, the present invention tests another embodiment of method of self-discharge of battery and comprises the following steps:
S201: by charge or discharge by the Voltage Cortrol of battery to be tested to preset range；
Wherein, described preset range can be adjusted according to different system batteries or different application purpose, Ke Yishe
It it is 3.0～3.6 volts.
Specifically, if the voltage of described mesuring battary is less than 3.0 volts, then described mesuring battary is adjusted by charging modes
In the range of voltage to 3.0～3.6 volts；If the voltage of described mesuring battary is higher than 3.6 volts, then by discharge mode adjust described in treat
In the range of surveying the voltage to 3.0～3.6 volts of battery.
S202: described mesuring battary is refrigerated to electrolyte solidification；
Wherein, the electrolyte of described battery refers to conduct the medium of ion between anode and negative pole；Treat described
Survey the freezing temperature of battery and have to be lower than the freezing point of electrolyte in described mesuring battary, the freezing point of electrolyte in different batteries
It is slightly different, is not specifically limited herein.
Such as, being placed in the low temperature environment of-100 DEG C by mesuring battary, now the electrolyte in mesuring battary can be somewhat
Quick solidification in clock.
S203: measure the resistance of described mesuring battary to obtain measuring resistance value；
Wherein, step S203 farther includes:
S2031: confirm whether the voltage of described mesuring battary has dropped down to 0 volt, if having dropped down to 0 volt, then carries out step
S2032, otherwise returns step S202；
S2032: put on described mesuring battary both positive and negative polarity with the test voltage of no more than 50 volts and measure described mesuring battary
Resistance.
S204: judge that whether described measurement resistance value is more than insulation resistance threshold value；If judged result is for being more than, then walk
Rapid S205, otherwise carries out step S206；
Wherein, described insulation resistance threshold value is to weigh the physical quantity of dielectric insulating properties quality, and it is numerically etc.
In the resistance value that described dielectric is had, unit is megaohm.
Specifically, described insulation resistance threshold value is 1 megaohm.
S205: be judged as that the self discharge situation of described mesuring battary meets the requirements；
S206: be otherwise judged as undesirable.
In the above-described embodiment, utilize the temperature being less than mesuring battary electrolyte freezing point that described mesuring battary is carried out
Freezing processing so that described electrolyte quick solidification, the resistance value of mesuring battary described in re-test, relatively described resistance value with absolutely
Edge resistance threshold, thus judge whether the self discharge situation of described mesuring battary meets the requirements, owing to electrolyte solidification only needs several
Minute, the resistance value testing described testing resistance the most only needs several seconds, and whole test process the most only needs a few minutes, it is possible to notable
Shorten test period, thus reach quickly to test the purpose of self-discharge of battery.
Referring to Fig. 3, Fig. 3 is the schematic diagram that the present invention tests equipment 10 1 embodiment of self-discharge of battery, such as Fig. 3 institute
Showing, the equipment 10 of described test self-discharge of battery includes: cryoprobe 101, measuring circuit 102, it is judged that circuit 103 and output circuit
104。
Cryoprobe 101 for being refrigerated to electrolyte solidification by mesuring battary；Wherein, the temperature of cryoprobe 101 must be provided with
For the freezing point less than described battery electrolyte, the electrolyte freezing point of different batteries is slightly different, and is not specifically limited herein.
Such as, being positioned over by mesuring battary in cryoprobe 101, temperature is set to-100 DEG C, now the electricity in mesuring battary
Solve liquid can within a few minutes quick solidification.
Measuring circuit 102 is for measuring the resistance of described mesuring battary to obtain measuring resistance value；
Specifically, described measuring circuit 102 first confirms that whether the voltage of described mesuring battary has dropped down to 0 volt；If dropping
To 0 volt, then put on described mesuring battary both positive and negative polarity with the test voltage less than 50 volts and measure the resistance of described mesuring battary, institute
The testing time stating the resistance measuring described mesuring battary was set to less than 10 seconds, then test result exports decision circuitry 103.
Wherein, if described test voltage sets the highest, described mesuring battary can be punctured.Such as, an exemplary test
In scene, for the mesuring battary used by measurement, finding that critical voltage is 50 volts through experiment test, preferably test voltage is 20
Volt.
For the mesuring battary of the example above, after confirming during test that the voltage of mesuring battary has been reduced to 0 volt, utilize and measure
Circuit 102 applies the unidirectional current of 20 volts at described mesuring battary both positive and negative polarity, and the testing time is set to 2 seconds, now can record described
The resistance value of mesuring battary.
Certainly, the critical voltage of different mesuring battaries is different with preferred test voltage, and the present invention is not restricted.
Decision circuitry 103 is used for judging that whether described measurement resistance value is more than insulation resistance threshold value；
Specifically, it is judged that circuit 103 receives the measurement result of described measuring circuit 102 output, and measures knot by described
Fruit compares with described insulation resistance threshold value, and comparative result exports output circuit 104；Wherein, described insulation resistance
Threshold value is 1 megaohm.Certainly, for difference or the difference of measurement requirement of practical situation, the insulation resistance threshold value of setting can be
Other numerical value.
Output circuit 104 for judged result be more than time, the self discharge situation exporting described mesuring battary conforms to
The measurement result asked, otherwise exports the undesirable measurement result of self discharge situation of described mesuring battary.
In present embodiment, described mesuring battary is positioned in described cryoprobe 101, and described measuring circuit 102 connects institute
Stating the both positive and negative polarity of mesuring battary, described decision circuitry 103 connects described measuring circuit 102, and described output circuit 104 connects described
Decision circuitry 103.
Specifically, after the electrolyte of described mesuring battary is solidified by described cryoprobe 101, described measuring circuit 102 is utilized
Measure the resistance value of described mesuring battary and measurement result is exported, after described decision circuitry 103 receives described measurement result
Judging whether it is more than insulation resistance threshold value and will determine that result exports, described output circuit 104 receives described judged result
And output it.
In another embodiment, the equipment of described test self-discharge of battery can also increase a charge-discharge circuit
105, test can be particularly suited for by the Voltage Cortrol of mesuring battary in the range of required by described charge-discharge circuit 105
The self discharge situation of one Battery pack.
Referring to Fig. 4, Fig. 4 is the schematic diagram that the present invention tests another embodiment of equipment of self-discharge of battery.Fig. 4 and figure
Structure in 3 is similar, does not repeats them here, and difference is that the equipment of described test self-discharge of battery farther includes charge and discharge
Electricity circuit 105, before described mesuring battary is refrigerated to electrolyte solidification, by charge or discharge by described electricity to be tested
The Voltage Cortrol in pond is in preset range.
Described preset range can be adjusted according to different system batteries or different application purpose, can be set to 3.0
～3.6 volts.
Specifically, if the voltage of described mesuring battary is less than 3.0 volts, then by charging circuit, described mesuring battary is carried out
Charging, in the range of bringing up to 3.0～3.6 volts by the voltage of described mesuring battary；If the voltage of described mesuring battary is higher than 3.6
Volt, then discharged to described mesuring battary by discharge circuit, the voltage of described mesuring battary be reduced to 3.0～3.6 volts
In the range of.
The present invention carries out freezing by being put into by mesuring battary in the temperature cryoprobe less than its electrolyte freezing point, thus
Enable to electrolyte rapid solidification, the most only need a few minutes；Confirm that the voltage of described mesuring battary is measured described after dropping to 0 volt
The resistance value of mesuring battary, by the self discharge feelings of described resistance value with mesuring battary described in the multilevel iudge of insulation resistance threshold value
Whether condition meets the requirements, and the wherein said resistance test time only needs several seconds, and whole test process only needs a few minutes, thus significantly contracts
The short testing time, the problem solving prior art detection cycle length.
The foregoing is only embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every utilization is originally
Equivalent structure or equivalence flow process that description of the invention and accompanying drawing content are made convert, or are directly or indirectly used in what other were correlated with
Technical field, is the most in like manner included in the scope of patent protection of the present invention.
Claims (10)
1. the method testing self-discharge of battery, it is characterised in that including:
Mesuring battary is refrigerated to electrolyte solidification；
Measure the resistance of described mesuring battary to obtain measuring resistance value；
Judge that whether described measurement resistance value is more than insulation resistance threshold value；
If judged result is for being more than, then it is judged as that the self discharge situation of described mesuring battary meets the requirements, is otherwise judged as not being inconsistent
Close requirement.
Method the most according to claim 1, it is characterised in that
Described mesuring battary is refrigerated to electrolyte solidification before, including: by charge or discharge by described battery to be tested
Voltage Cortrol is in preset range.
Method the most according to claim 1, it is characterised in that
The resistance of the described mesuring battary of described measurement includes to obtain measurement resistance value:
Confirm whether the voltage of described mesuring battary has dropped down to 0 volt；
If having dropped down to 0 volt, then put on described mesuring battary both positive and negative polarity with the test voltage less than 50 volts and measure described electricity to be measured
The resistance in pond.
Method the most according to claim 3, it is characterised in that
The testing time of the resistance of the described mesuring battary of described measurement was set to less than 10 seconds.
5. according to the method described in any one of Claims 1-4, it is characterised in that
Described insulation resistance threshold value is 1 megaohm.
6. the equipment testing self-discharge of battery, it is characterised in that including:
Cryoprobe, for being refrigerated to electrolyte solidification by mesuring battary；
Measuring circuit, for measuring the resistance of described mesuring battary to obtain measuring resistance value；
Decision circuitry, is used for judging that whether described measurement resistance value is more than insulation resistance threshold value；
Output circuit, for judged result be more than time, export the satisfactory survey of self discharge situation of described mesuring battary
Amount result, otherwise exports the undesirable measurement result of self discharge situation of described mesuring battary.
Equipment the most according to claim 6, it is characterised in that
Farther include charge-discharge circuit, before mesuring battary is refrigerated to electrolyte solidification, will by charge or discharge
The Voltage Cortrol of described battery to be tested is in preset range.
Equipment the most according to claim 6, it is characterised in that
Described measuring circuit specifically for:
Confirm whether the voltage of described mesuring battary has dropped down to 0 volt；
If having dropped down to 0 volt, then put on described mesuring battary both positive and negative polarity with the test voltage less than 50 volts and measure described electricity to be measured
The resistance in pond.
Equipment the most according to claim 8, it is characterised in that
The testing time of the resistance of the described mesuring battary of described measurement was set to less than 10 seconds.
10. according to the equipment described in any one of claim 6 to 9, it is characterised in that
Described insulation resistance threshold value is 1 megaohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677371.2A CN106249162A (en) | 2016-08-16 | 2016-08-16 | A kind of method and apparatus testing self-discharge of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677371.2A CN106249162A (en) | 2016-08-16 | 2016-08-16 | A kind of method and apparatus testing self-discharge of battery |
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| CN106249162A true CN106249162A (en) | 2016-12-21 |
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ID=57592142
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| CN201610677371.2A Pending CN106249162A (en) | 2016-08-16 | 2016-08-16 | A kind of method and apparatus testing self-discharge of battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108717167A (en) * | 2018-06-04 | 2018-10-30 | 合肥工业大学 | Batteries of electric automobile self discharge fault judgment method based on equivalent short-circuit internal resistance model |
| JP2019160779A (en) * | 2018-03-06 | 2019-09-19 | トヨタ自動車株式会社 | Method for testing all solid state battery, method for producing all solid state battery, and method for producing battery pack |
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| CN101242013A (en) * | 2007-02-06 | 2008-08-13 | 松下电器产业株式会社 | Evaluation method for battery safety in the event of internal short circuit and evaluation apparatus used therefor |
| JP2011069775A (en) * | 2009-09-28 | 2011-04-07 | Nissan Motor Co Ltd | Method of inspecting secondary battery |
| JP2014082121A (en) * | 2012-10-17 | 2014-05-08 | Toyota Motor Corp | Method for manufacturing nonaqueous electrolyte secondary battery |
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| JP2001076752A (en) * | 1999-07-06 | 2001-03-23 | Matsushita Electric Ind Co Ltd | Inspection device for and inspection method of battery element |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2019160779A (en) * | 2018-03-06 | 2019-09-19 | トヨタ自動車株式会社 | Method for testing all solid state battery, method for producing all solid state battery, and method for producing battery pack |
| JP7119925B2 (en) | 2018-03-06 | 2022-08-17 | トヨタ自動車株式会社 | Method for inspecting all-solid-state battery, method for manufacturing all-solid-state battery, and method for manufacturing assembled battery |
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