CN104347895A - Test method of lithium battery short circuit protection - Google Patents
Test method of lithium battery short circuit protection Download PDFInfo
- Publication number
- CN104347895A CN104347895A CN201310310949.7A CN201310310949A CN104347895A CN 104347895 A CN104347895 A CN 104347895A CN 201310310949 A CN201310310949 A CN 201310310949A CN 104347895 A CN104347895 A CN 104347895A
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- Prior art keywords
- oscilloscope
- lithium battery
- voltage
- passage
- current
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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]
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
Abstract
The invention provides a test method of lithium battery short circuit protection. The method comprises the following steps: providing an oscilloscope, an oscilloscope voltage probe, an oscilloscope current probe, and a lithium battery with a positive electrode lead wire and a negative electrode lead wire; peeling off the insulation layers of the positive electrode lead wire and the negative electrode lead wire to a preset length so as to form exposed parts, removing the single-strand burr wires on the exposed parts, starting and correcting the oscilloscope, collecting single waveforms, connecting the positive electrode lead wire and the negative electrode lead wire to the oscilloscope voltage probe and the oscilloscope current probe respectively; resetting the oscilloscope to the single sequence mode, and connecting the positive electrode lead wire and the negative electrode lead wire to obtain the short circuit protection time of the lithium battery and the short circuit current peak value of the lithium battery. The test method utilizes an oscilloscope to obtain the voltage curve and current curve of a lithium battery in short circuit so as to obtain the data of the short circuit protection time and the short circuit current peak value of the lithium battery, thus a reference can be provided for the safety use of the lithium battery, and the test efficiency is also improved.
Description
Technical field
The present invention relates to a kind of method of testing, particularly relate to a kind of method of testing of lithium battery short-circuit protection.
Background technology
Lithium ion battery is third generation small battery.As a kind of novel chemical power source, it is high that it has voltage, specific energy is large, discharge potential curve is steady, and self discharge is little, has extended cycle life, the advantage that memoryless grade is outstanding, can meet people to the battery smart lightweight requirements required for portable electronics, be widely used in the miniaturized electronics such as mobile communication, notebook computer, be also the ideal source that following electric vehicle uses.
But along with the use of lithium ion battery, also there is many security incidents in lithium ion battery, as exploded, catching fire.In order to better, safer uses lithium battery in life; each producer all can add a baffle when lithium battery encapsulation at the electrode place of battery core; in case the output of battery or input are opened when battery uses under abnormal state of affairs; prevent from continuing when abnormality to use, thus occur security incident.The safety protection function of lithium battery protection board mainly contains overcurrent protection, over, overcurrent protection and short-circuit protection etc.Often only with voltage or only obtain battery short circuit guard time or short-circuit protection peak current by voltage individual event test result in prior art; for providing data accurately with the matching used baffle of lithium battery, thus the safety and reliability of lithium battery use cannot be reduced.
Summary of the invention
The object of the present invention is to provide a kind of method of testing can testing lithium battery lithium battery short-circuit protection when short circuit.
In order to solve the problems of the technologies described above, the invention provides a kind of method of testing of lithium battery short-circuit protection, the method comprises the following steps:
There is provided oscilloscope, oscilloscope voltage probe, oscilloscope current pop one's head in, lithium battery, described lithium battery with positive wire and negative wire,
Respectively the insulating barrier strip off preset length on the positive wire of described lithium battery and negative wire is formed each exposed part,
Remove the sub-thread burr line on each described exposed part,
Open and corrected described oscilloscope,
Described oscilloscope voltage probe and described oscilloscope current are popped one's head in and is connected on the default passage of first on described oscilloscope and the second default passage; described first gear presetting passage is adjusted to the gear matched with the voltage of described lithium battery; described second gear presetting passage is adjusted to default gear; the very first time scope that described oscillographic time style extremely matches with theoretical guard time scope during described lithium battery short circuit; then open described first respectively and preset passage and the described second default passage; select single sequence pattern
Described positive wire and described negative wire are connected on described oscilloscope voltage probe and described oscilloscope current probe, described oscilloscope are reset to described single sequence pattern,
Described positive wire is connected with described negative wire,
When the voltage and current gathering line on described oscilloscope suddenlys change a voltage curve and a current curve respectively, open oscillographic time shaft, by very first time axis location in described original position, then the second time axis is positioned at described end position, read the time layout between described very first time axis and described second time axis, obtain the short-circuit protection time of described lithium battery, wherein, described original position is the position that described current curve and the sudden change of described voltage curve start, described end position is the position that described current curve and the sudden change of described voltage curve terminate,
Open oscillographic voltage axis, first voltage axis is positioned at described original position, then described second voltage axis is positioned at described first peak, read the voltage between described first voltage axis and described second voltage axis, the peak value of short of described lithium battery is calculated according to described default gear, wherein, described first peak is the peak of the electric current of described current curve sudden change.
Wherein, provide that oscilloscope, oscilloscope voltage probe, oscilloscope current are popped one's head in, lithium battery described, described lithium battery is with in the step of positive wire and negative wire, and the multiple of described oscilloscope voltage probe is 1 times.
Wherein, provide that oscilloscope, oscilloscope voltage probe, oscilloscope current are popped one's head in, lithium battery described, described lithium battery is with in the step of positive wire and negative wire, and described lithium battery is mounted with the electricity of 95% ~ 100%.
Wherein, formed in the step of each exposed part by the insulating barrier strip off preset length on the positive wire of described lithium battery and negative wire respectively described, described preset length is 0.5 ~ 1.5mm.
Wherein, described preset length is 1mm.
Wherein, in the step of the sub-thread burr line on each described exposed part of described removal, by removing the sub-thread burr line on each described exposed part with scolding tin tin on each described exposed part.
Wherein, be connected to first on described oscilloscope and preset passage and second described described oscilloscope voltage probe and described oscilloscope current popped one's head in and preset on passage, described first gear presetting passage is adjusted to the gear matched with the voltage of described lithium battery, described second gear presetting passage is adjusted to default gear, the very first time scope that described oscillographic time style extremely matches with guard time scope during described lithium battery short circuit, then open described first respectively and preset passage and the described second default passage, select in the step of single sequence pattern, described first default passage and described second is preset passage and is disposed adjacent on described oscilloscope.
Wherein, described, described positive wire and described negative wire are connected on described oscilloscope voltage probe and described oscilloscope current probe, described oscilloscope is reset in the step of described single sequence pattern, described positive wire and described negative wire are folded in described oscilloscope voltage probe, by the sensing hole of described negative wire through described oscilloscope current probe.
Voltage curve when method of testing provided by the invention is by utilizing oscilloscope to capture lithium battery short circuit simultaneously and current curve; short-circuit protection time when obtaining lithium battery short circuit and the data of peak value of short; thus provide foundation for the reliable use of lithium battery; also for providing data accurately for the protection of the baffle of described lithium battery, make product more safe and reliable.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in execution mode below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the method for testing of lithium battery short-circuit protection provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is clearly and completely described.
Refer to Fig. 1, the method for testing of a kind of lithium battery short-circuit protection that embodiment of the present invention provides.The method comprises the following steps:
Step 101: provide oscilloscope, oscilloscope voltage probe, oscilloscope current to pop one's head in and lithium battery, described lithium battery is with positive wire and negative wire.In present embodiment, the multiple of described oscilloscope voltage probe is 1 times, because the voltage compare of described lithium battery is little, therefore selects the described oscilloscope voltage probe of 1 times more to tally with the actual situation.Described lithium battery is mounted with the electricity of 95% ~ 100%, concrete, and the electricity of described lithium battery is 100%, can provide larger energy for the method for testing of lithium battery short-circuit protection, thus obtains data more accurately.
Step 103: respectively the insulating barrier strip off preset length on the positive wire of described lithium battery and negative wire is formed each exposed part.In present embodiment, described preset length is 0.5 ~ 1.5mm.Concrete, described preset length is 1mm.
Step 105: remove the sub-thread burr line on each described exposed part.This step, for ensureing that described lithium battery is when utilizing oscilloscope to carry out short-circuit test, there will not be burr spike to affect the accuracy of test.In present embodiment, by removing the sub-thread burr line on each described exposed part with scolding tin tin on each described exposed part, thus when making described lithium battery carry out short-circuit test, burr spike is there will not be to affect test result.
Step 107: open and corrected described oscilloscope.For guaranteeing that described oscilloscope can work in testing normally in this step.
Step 109: described oscilloscope voltage probe and described oscilloscope current are popped one's head in and is connected on the default passage of first on described oscilloscope and the second default passage; described first gear presetting passage is adjusted to the gear matched with the voltage of described lithium battery; described second gear presetting passage is adjusted to default gear; the very first time scope that described oscillographic time style extremely matches with theoretical guard time scope during described lithium battery short circuit; then open described first respectively and preset passage and the described second default passage, select single sequence pattern.This step guarantees that described lithium battery there will not be distortion when capturing voltage, current curve with described oscilloscope.In present embodiment, in order to the cabling making described oscilloscope voltage probe and described oscilloscope current pop one's head in is the shortest, the described first default passage and described second is preset passage and is disposed adjacent on described oscilloscope.Concrete, select corresponding gear and scope according to described lithium battery, described oscilloscope voltage probe is connected to described first and presets on passage, and the described first gear presetting passage is adjusted to 2V; Described oscilloscope current probe is connected to described second and presets on passage; and the described second gear presetting passage is adjusted to 200mV/A; because theoretical guard time scope during described lithium battery short circuit is 380us; on described oscilloscope time layout closest to described 380us and the time range being greater than described 380us is 500us; therefore described very first time scope is 500us; by adjust above-mentioned corresponding gear and time layout; gather single waveform; thus guarantee that described lithium battery is when using described oscilloscope to capture voltage, current curve, there will not be distortion phenomenon.
Step 111: described positive wire and described negative wire are connected on described oscilloscope voltage probe and described oscilloscope current probe, described oscilloscope is reset to described single sequence pattern.In present embodiment, described positive wire and described negative wire are folded in described oscilloscope voltage probe, by the sensing hole of described negative wire through described oscilloscope current probe, described current curve and described voltage curve can not be superimposed together, facilitate reading.Certainly, in other embodiments, described positive wire and described negative wire are folded in described oscilloscope voltage probe, by the sensing hole of described positive wire through described oscilloscope current probe.
Step 113: described positive wire is connected with described negative wire.This step is used for described lithium battery short circuit.
Step 115: when the voltage and current gathering line on described oscilloscope suddenlys change a voltage curve and a current curve respectively, open oscillographic time shaft, by very first time axis location in described original position, then the second time axis is positioned at described end position, read the time layout between described very first time axis and described second time axis, obtain the short-circuit protection time of described lithium battery, wherein, described original position is the position that described current curve and the sudden change of described voltage curve start, described end position is the position that described current curve and the sudden change of described voltage curve terminate.In the present embodiment; time layout between described very first time axis and described second time axis is 350us; therefore short-circuit protection time when can learn described lithium battery short circuit is 350us; thus can, for providing data accurately for the protection of the baffle of described lithium battery, make product more safe and reliable.
Step 117: open oscillographic voltage axis, first voltage axis is positioned at described original position, then described second voltage axis is positioned at described first peak, read the voltage between described first voltage axis and described second voltage axis, the peak value of short of described lithium battery is calculated according to described default gear, wherein, described first peak is the peak of electric current of described electric current, voltage curve sudden change.In present embodiment; voltage between described first voltage axis and described second voltage axis is 180mV/A; due in step 109; described default gear is 200mV/A; therefore the peak value of short that can calculate described lithium battery is 0.9A; thus can, for providing data accurately for the protection of the baffle of described lithium battery, make product more safe and reliable.
Voltage curve when method of testing provided by the invention is by utilizing oscilloscope to capture lithium battery short circuit simultaneously and current curve; short-circuit protection time when obtaining lithium battery short circuit and the data of peak value of short; thus provide foundation for the reliable use of lithium battery; also for providing data accurately for the protection of the baffle of described lithium battery, make product more safe and reliable.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (8)
1. a method of testing for lithium battery short-circuit protection, is characterized in that, the method comprises the following steps:
There is provided oscilloscope, oscilloscope voltage probe, oscilloscope current pop one's head in and lithium battery, described lithium battery with positive wire and negative wire,
Respectively the insulating barrier strip off preset length on the positive wire of described lithium battery and negative wire is formed each exposed part,
Remove the sub-thread burr line on each described exposed part,
Open and corrected described oscilloscope,
Described oscilloscope voltage probe and described oscilloscope current are popped one's head in and is connected on the default passage of first on described oscilloscope and the second default passage; described first gear presetting passage is adjusted to the gear matched with the voltage of described lithium battery; described second gear presetting passage is adjusted to default gear; the very first time scope that described oscillographic time style extremely matches with theoretical guard time scope during described lithium battery short circuit; then open described first respectively and preset passage and the described second default passage; select single sequence pattern
Described positive wire and described negative wire are connected on described oscilloscope voltage probe and described oscilloscope current probe, described oscilloscope are reset to described single sequence pattern,
Described positive wire is connected with described negative wire,
When the voltage and current gathering line on described oscilloscope suddenlys change a voltage curve and a current curve respectively, open oscillographic time shaft, by very first time axis location in described original position, then the second time axis is positioned at described end position, read the time layout between described very first time axis and described second time axis, obtain the short-circuit protection time of described lithium battery, wherein, described original position is the position that described current curve and the sudden change of described voltage curve start, described end position is the position that described current curve and the sudden change of described voltage curve terminate,
Open oscillographic voltage axis, first voltage axis is positioned at described original position, then described second voltage axis is positioned at described first peak, read the voltage between described first voltage axis and described second voltage axis, the peak value of short of described lithium battery is calculated according to described default gear, wherein, described first peak is the peak of the electric current of described current curve sudden change.
2. the method for testing of lithium battery short-circuit protection according to claim 1; it is characterized in that; oscilloscope, oscilloscope voltage probe, oscilloscope current probe, lithium battery is provided described; described lithium battery is with in the step of positive wire and negative wire, and the multiple of described oscilloscope voltage probe is 1 times.
3. the method for testing of lithium battery short-circuit protection according to claim 1; it is characterized in that; oscilloscope, oscilloscope voltage probe, oscilloscope current probe, lithium battery is provided described; described lithium battery is with in the step of positive wire and negative wire, and described lithium battery is mounted with the electricity of 95% ~ 100%.
4. the method for testing of lithium battery short-circuit protection according to claim 1; it is characterized in that; formed in the step of each exposed part by the insulating barrier strip off preset length on the positive wire of described lithium battery and negative wire respectively described, described preset length is 0.5 ~ 1.5mm.
5. the method for testing of lithium battery short-circuit protection according to claim 4, is characterized in that, described preset length is 1mm.
6. the method for testing of lithium battery short-circuit protection according to claim 1; it is characterized in that; in the step of the sub-thread burr line on each described exposed part of described removal, by removing the sub-thread burr line on each described exposed part with scolding tin tin on each described exposed part.
7. the method for testing of lithium battery short-circuit protection according to claim 1, it is characterized in that, be connected to first on described oscilloscope and preset passage and second described described oscilloscope voltage probe and described oscilloscope current popped one's head in and preset on passage, described first gear presetting passage is adjusted to the gear matched with the voltage of described lithium battery, described second gear presetting passage is adjusted to default gear, the very first time scope that described oscillographic time style extremely matches with guard time scope during described lithium battery short circuit, then open described first respectively and preset passage and the described second default passage, select in the step of single sequence pattern, described first default passage and described second is preset passage and is disposed adjacent on described oscilloscope.
8. the method for testing of lithium battery short-circuit protection according to claim 1; it is characterized in that; described, described positive wire and described negative wire are connected on described oscilloscope voltage probe and described oscilloscope current probe; described oscilloscope is reset in the step of described single sequence pattern; described positive wire and described negative wire are folded in described oscilloscope voltage probe, by the sensing hole of described negative wire through described oscilloscope current probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310310949.7A CN104347895A (en) | 2013-07-23 | 2013-07-23 | Test method of lithium battery short circuit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310310949.7A CN104347895A (en) | 2013-07-23 | 2013-07-23 | Test method of lithium battery short circuit protection |
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| Publication Number | Publication Date |
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| CN104347895A true CN104347895A (en) | 2015-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310310949.7A Pending CN104347895A (en) | 2013-07-23 | 2013-07-23 | Test method of lithium battery short circuit protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772069A (en) * | 2016-11-30 | 2017-05-31 | 宁德时代新能源科技股份有限公司 | Method and device for detecting battery short circuit |
| CN108957338A (en) * | 2018-06-25 | 2018-12-07 | 清华大学 | The extracting method of power battery internal short-circuit electric current |
-
2013
- 2013-07-23 CN CN201310310949.7A patent/CN104347895A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772069A (en) * | 2016-11-30 | 2017-05-31 | 宁德时代新能源科技股份有限公司 | Method and device for detecting battery short circuit |
| CN108957338A (en) * | 2018-06-25 | 2018-12-07 | 清华大学 | The extracting method of power battery internal short-circuit electric current |
| CN108957338B (en) * | 2018-06-25 | 2019-11-22 | 清华大学 | The extracting method of power battery internal short-circuit electric current |
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Application publication date: 20150211 |