CN103235267A - Method for quickly and effectively comparing self-discharge rates of batteries - Google Patents
Method for quickly and effectively comparing self-discharge rates of batteries Download PDFInfo
- Publication number
- CN103235267A CN103235267A CN201310112268XA CN201310112268A CN103235267A CN 103235267 A CN103235267 A CN 103235267A CN 201310112268X A CN201310112268X A CN 201310112268XA CN 201310112268 A CN201310112268 A CN 201310112268A CN 103235267 A CN103235267 A CN 103235267A
- Authority
- CN
- China
- Prior art keywords
- battery
- self
- batteries
- discharge
- open
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a method for quickly and effectively comparing self-discharge rates of batteries. The method includes steps of 1), continuing charging the batteries in a constant-voltage and current-limiting manner when the batteries are in normal fully charged states, and stopping charging the batteries when charging currents are reduced to extremely low states or jump up and down at certain current values for a long time; 2), laying the batteries processed in the step 1) aside for a certain duration shorter than or equal to 7 days; 3), measuring open-circuit voltages of the batteries after the batteries are laid aside for the certain duration; and 4), comparing the open-circuit voltages measured in the step 3) to a standard value, determining that self-discharge of the batteries is abnormal if the open-circuit voltages are lower than the standard value, and determining that the self-discharge of the batteries are normal if the open-circuit voltages are higher than the standard value. The charging currents in the extremely low states are lower than or equal to 0.001C, and the long time is longer than or equal to 1 hour. Compared with the traditional method, the method for quickly and effectively comparing the self-discharge rates of the batteries has the advantages that the effectiveness for selecting the self-discharge rates of the batteries is obviously improved, and the method is applicable to large-scale selection, is high in selection efficiency and is effective.
Description
Technical field
The present invention relates to a kind of quick effective ratio than the method for self-discharge of battery rate size.
Background technology
Along with country to the pay attention to day by day of environmental protection and the progressively enhancing of people's environmental consciousness, lithium ion battery not only is used for traditional digital product, and is applied to electric tool, electric bicycle even electric automobile and large-scale energy storage device more and more widely.When lithium ion battery applications during in mobile phone or this class digital product of camera, owing to be single connection in series-parallel that need not between battery of only using separately, therefore the overall performance of battery is required lowlyer, only need capacity and cycle performance is qualified gets final product.But when being applied to the higher field of operating voltage such as electric bicycle, electric automobile, need many batteries to connect in order to reach required voltage.When the battery series connection is used, even if this moment, single the qualified performance of integral battery door group that but do not guarantee of battery capacity cycle performance met the requirements, also need the consistance coupling to battery, i.e. said battery sorting pairing.When battery being carried out the consistance coupling, there be parameter and the matching process of oneself in each producer, as mating by multiparameters such as curve degree of fitting coupling, comprehensive discharge capacity, constant current capacity, middle threshold voltage, internal resistances, no matter which kind of matching process all is indispensable to selecting of self-discharge of battery.Why so important to the performance of electric battery be selecting of self-discharge of battery? illustrate: a 36V10Ah electric bicycle battery group is to be in series by 12 3.2V10Ah ferric phosphate lithium cells, the capacity of dispatching from the factory of supposing every cell is 10Ah, the self-discharge rate unanimity that 11 batteries are arranged in 12 cells, and remaining 1 exceed 24mAh/ days than other self-discharge of battery rate, then the battery capacity of self discharge high rate will reduce 24*30=720mAh (0.72Ah) than other battery remaining power after battery dispatched from the factory one month, the whole discharge capacity of electric battery this moment just has only 9.28Ah, and the capacitance loss rate reaches 7.2%.If single battery uses, this moment, the capacity of loss can replenish by charging next time, did not influence later discharge performance; But when using in groups, it is discharged at first during the high battery discharge of self-discharge rate, and this moment, other battery capacity was not put yet, when charging, can not be full of by the high battery of restriction self-discharge rate of other battery charge capacity, and self discharge difference is accompanied by the entire cell life cycle, so As time goes on, the battery that self-discharge rate is high can fill capacity compare fewer and feweri with other battery, cause the entire cell pool-size defective at last, if therefore do not have balanced measure or carry out only additional electricity of list, this loss will remedy.At present, to the following several thinkings of selecting of self-discharge of battery difference: the one, measure the self discharge size of current of every battery, to mate by the self discharge electric current then, this method is to measure the absolute self-discharge rate of battery; The 2nd, measure self discharge capacity in a period of time according to the definition of self discharge, the concrete operations step is to setting voltage with constant-current charging of battery, change constant-voltage charge subsequently and after electric current is down to a certain value (being not less than 0.01C usually), stop charging, shelve, arrival is shelved the time (reaching 28 days usually) back battery is discharged, the capacitance loss of battery before and after relatively shelving, thereby the self discharge capacity during calculating it and shelving; The 3rd, the relative self-discharge rate of mensuration battery, the same method two of its charging process of the method, difference is that it shelves the time shorter (usually in 14 days), arrive the open-circuit voltage that battery is measured in the back in the time of shelving, be used as judging a foundation of the relative self-discharge rate of battery with the voltage drop of battery.Have the instrumentation that utilizes method one and make at present, but its price height, a battery was measured the cycle more than 12 hours, and once can only survey a battery, even if so this kind mode test result accurate, but its testing cost is too high, be not suitable for large-scale production, only be applicable to experiment usefulness at present; Method two is that general lithium ion battery is to the standard method of test of self-discharge rate, but its shortcoming is that the mensuration cycle is oversize, three test periods of method are relatively short and can test in batches, it also is the selection method that present most producer adopts aborning, therefore can be described as a kind of classic method of selecting comparison self-discharge of battery rate size, but it is unsatisfactory to experimental results show that it selects effect.
Therefore, need a kind of quick effective ratio than the method for self-discharge of battery rate size to address the above problem.
Summary of the invention
Goal of the invention: compare the defective of the method for self-discharge of battery rate size in the present invention is directed in the prior art, the method for a kind of quick effective ratio than self-discharge of battery rate size is provided.
Technical scheme: for solving the problems of the technologies described above, quick effective ratio of the present invention adopts following technical scheme than the method for self-discharge of battery rate size:
A kind of quick effective ratio may further comprise the steps than the method for self-discharge of battery rate size:
1), normally is full of under the state of electricity at battery, continuation is carried out modified constant-voltage charge to battery, be down to extremely low state or stop charging during for a long time at a certain current value bob until charging current, wherein, described extremely low state be charging current smaller or equal to 0.001C, described is more than or equal to 1 hour for a long time;
2), will shelve through the battery that step 1) is handled, the time of shelving was smaller or equal to 7 days;
3), shelve end after, measure the open-circuit voltage of battery;
4), open-circuit voltage and standard value that step 3) is recorded compare, open-circuit voltage be lower than standard value to be judged to be self discharge unusual, open-circuit voltage be higher than standard value to be judged to be self discharge normal.
Further, the time of shelving step 2) is 5 days.
Beneficial effect: the present invention is the improvement to classic method, by dwindling the difference between charging cut-off current and normal battery self discharge electric current, make that self-discharge of battery becomes the principal element that causes cell voltage to descend after charging stops, strengthen the matching relationship between voltage drop and self discharge, thereby judge relatively self discharge difference between battery.Quick effective ratio of the present invention is than the relative classic method of method of self-discharge of battery rate size, and the validity that the self-discharge of battery rate is selected is significantly increased, and this method is applicable to that scale selects, and it is higher to select efficient, more effective.
Description of drawings
Fig. 1 is battery simple equivalent circuit figure;
Fig. 2 shelves voltage for the battery of shelving voltage method mensuration by tradition and it shelves corresponding relation figure between the capacitance loss rate of back;
Fig. 3 shelves voltage for the battery that adopts quick effective ratio of the present invention to measure than the method for self-discharge of battery rate size and it shelves corresponding relation figure between the capacitance loss rate of back.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment only is used for explanation the present invention and is not used in and limits the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
See also Fig. 1, Fig. 2 and shown in Figure 3, quick effective ratio of the present invention may further comprise the steps than the method for self-discharge of battery rate size:
1), normally is full of under the state of electricity at battery, continuation is carried out modified constant-voltage charge to battery, be down to extremely low state or stop charging during for a long time at a certain current value bob until charging current, wherein, extremely low state be charging current smaller or equal to 0.001C, is more than or equal to 1 hour for a long time;
2), will shelve through the battery that step 1) is handled, the time of shelving was smaller or equal to 7 days; When scale is selected, all batteries of handling through step 1) are placed under the identical environment, shelve;
3), shelve end after, measure the open-circuit voltage of battery;
4), open-circuit voltage and standard value that step 3) is recorded compare, open-circuit voltage be lower than standard value to be judged to be self discharge unusual, open-circuit voltage be higher than standard value to be judged to be self discharge normal.Wherein, standard value can provide by experiment, and this standard value is applicable to the battery of the same manufacturer production of same recipe same process.
When the performance of research battery, generally the simple equivalence of battery can be become as shown in Figure 1 electric capacity and the circuit diagram of resistance.Self-discharge of battery can regard that electric capacity pair and its parallel resistor discharge cause as.After stopping charging, the voltage of battery descends thereupon.But this moment, the decline of cell voltage was caused by self discharge on the one hand, then was because the voltage falling that fades away and cause of battery polarization after stopping to charge on the other hand.Be example with the ferric phosphate lithium cell, its self discharge electric current is generally less than 0.0001C, and the general low 0.01C of the charging cut-off current in when charging tradition, when stopping to charge, the voltage falling that is caused by polarization will be far longer than the voltage decline that is caused by self discharge, and the latter is flooded fully by the former, unless therefore self discharge is unusual especially, otherwise be difficult to the voltage differences that discovery causes because of self discharge, this point is confirmed by Fig. 2.The present invention is the improvement to classic method, by dwindling the difference between charging cut-off current and normal battery self discharge electric current, make that self-discharge of battery becomes the principal element that causes cell voltage to descend after charging stops, strengthen the matching relationship between voltage drop and self discharge, thereby judge relatively self discharge difference between battery.In order to contrast classic method and actual effect of the present invention, choose 20 3.2V10Ah batteries and test, normally full electric charging process is: to 3.65V, change constant-voltage charge with the 0.2C constant-current charge, charging finishes when charging current reaches 0.01C.The voltage of shelving among Fig. 2 is to record in a traditional way, and the voltage of shelving among Fig. 3 is that then the present invention measures, namely normally be full of the electricity back continue with constant-voltage charge to electric current less than 0.001C, shelved subsequently in 10 hours in limited time, the time of shelving is 5 days.Two kinds of methods to after the shelving voltage determination and finish of battery, by the mode of charging normal Experimental cell is full of, shelve (shelving 1 year) then for a long time, discharge at last, mensuration is shelved the battery remaining power after a year, compares with shelving preceding capacity, calculates the capacitance loss rate, again the capacitance loss rate of each Experimental cell is shelved voltage with the corresponding battery that two kinds of methods record and compare, obtain Fig. 2 and Fig. 3 respectively.From the contrast of two figure as can be seen, relatively the voltage differences (9mV) that records of classic method is obvious for the voltage differences (37mV) of shelving of 20 batteries that the present invention records, and to the Experimental cell of doing, when shelving voltage and be lower than 3420mV, its self discharge capacitance loss rate substantially all is higher than 6%, shelve voltage and classic method is measured, except its correspondence of battery of capacitance loss rate maximum shelve voltage low, other battery does not all have corresponding evident regularity with its capacitance loss rate.The relative classic method of the present invention, the validity that the self-discharge of battery rate is selected is significantly increased.
Quick effective ratio of the present invention is than the relative classic method of method of self-discharge of battery rate size, and the validity that the self-discharge of battery rate is selected is significantly increased, and this method is applicable to that scale selects, and it is higher to select efficient, more effective.
Claims (2)
1. a quick effective ratio is characterized in that than the method for self-discharge of battery rate size, may further comprise the steps:
1), normally is full of under the state of electricity at battery, continuation is carried out modified constant-voltage charge to battery, be down to extremely low state or stop charging during for a long time at a certain current value bob until charging current, wherein, described extremely low state be charging current smaller or equal to 0.001C, described is more than or equal to 1 hour for a long time;
2), will shelve through the battery that step 1) is handled, the time of shelving was smaller or equal to 7 days;
3), shelve end after, measure the open-circuit voltage of battery;
4), open-circuit voltage and standard value that step 3) is recorded compare, open-circuit voltage be lower than standard value to be judged to be self discharge unusual, open-circuit voltage be higher than standard value to be judged to be self discharge normal.
2. quick effective ratio as claimed in claim 1 is characterized in that step 2 than the method for self-discharge of battery rate size) described in the time of shelving be 5 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310112268.XA CN103235267B (en) | 2013-04-02 | 2013-04-02 | A kind of quick effective ratio is compared with the method for battery self discharge rate size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310112268.XA CN103235267B (en) | 2013-04-02 | 2013-04-02 | A kind of quick effective ratio is compared with the method for battery self discharge rate size |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103235267A true CN103235267A (en) | 2013-08-07 |
| CN103235267B CN103235267B (en) | 2015-10-21 |
Family
ID=48883318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310112268.XA Active CN103235267B (en) | 2013-04-02 | 2013-04-02 | A kind of quick effective ratio is compared with the method for battery self discharge rate size |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103235267B (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683439A (en) * | 2014-01-09 | 2014-03-26 | 北京沃特优科技有限公司 | System and method for controlling charge of lithium battery pack |
| CN104714178A (en) * | 2013-12-13 | 2015-06-17 | 北汽福田汽车股份有限公司 | Testing method for boundary conditions of battery charge-discharge |
| CN104979597A (en) * | 2015-06-26 | 2015-10-14 | 桐乡市众胜能源科技有限公司 | Lithium ion battery self-discharge method |
| CN106054086A (en) * | 2016-07-11 | 2016-10-26 | 深圳天珑无线科技有限公司 | Battery self-discharge detection method and apparatus |
| CN106918785A (en) * | 2015-12-27 | 2017-07-04 | 深圳市沃特玛电池有限公司 | One kind detection self discharge of lithium iron phosphate battery method |
| CN106935890A (en) * | 2015-12-29 | 2017-07-07 | 中国电力科学研究院 | A kind of self-discharge characteristics evaluation method of flow battery system |
| 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 |
| CN108061861A (en) * | 2017-11-29 | 2018-05-22 | 东莞市创明电池技术有限公司 | The screening technique of lithium ion battery self discharge |
| CN110488201A (en) * | 2019-07-03 | 2019-11-22 | 浙江锋锂新能源科技有限公司 | A kind of charge states of lithium ion battery electric discharge screening technique, system, storage medium |
| CN111103482A (en) * | 2019-12-16 | 2020-05-05 | 肇庆绿宝石电子科技股份有限公司 | Full-automatic test method and system for super capacitor |
| CN111923780A (en) * | 2020-07-06 | 2020-11-13 | 宝能(广州)汽车研究院有限公司 | Battery management method, battery system for vehicle and vehicle |
| CN112924874A (en) * | 2021-01-26 | 2021-06-08 | 同济大学 | Battery overcharge degree diagnosis method based on relaxation voltage curve |
| CN113296005A (en) * | 2021-04-25 | 2021-08-24 | 浙江超威创元实业有限公司 | Method for testing voltage drop of battery |
| CN113655390A (en) * | 2021-08-09 | 2021-11-16 | 湖北亿纬动力有限公司 | Analysis method for differential pressure fault of battery system |
| CN113848489A (en) * | 2021-09-10 | 2021-12-28 | 欣旺达电动汽车电池有限公司 | Battery short circuit identification method and device and storage medium |
| CN114355212A (en) * | 2021-12-31 | 2022-04-15 | 珠海冠宇电池股份有限公司 | Battery self-discharge detection method and device, computer equipment and storage medium |
| CN114184969B (en) * | 2021-12-08 | 2023-11-28 | 蜂巢能源科技(无锡)有限公司 | Method and device for testing reversible self-discharge capacity loss of battery cell |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000316235A (en) * | 1999-04-28 | 2000-11-14 | Japan Storage Battery Co Ltd | Method for restoring capacity of alkaline storage battery and charger for the alkaline storage battery |
| JP2003123851A (en) * | 2001-10-11 | 2003-04-25 | Japan Storage Battery Co Ltd | Residual capacity estimation method for lead-acid battery |
| CN102109580A (en) * | 2011-01-30 | 2011-06-29 | 白科 | Process for detecting self discharge of lithium iron phosphate battery |
| CN102117937A (en) * | 2011-01-12 | 2011-07-06 | 合肥国轩高科动力能源有限公司 | Self-discharge screening method for lithium ion phosphate battery |
| CN102508165A (en) * | 2011-10-20 | 2012-06-20 | 合肥国轩高科动力能源有限公司 | Method for evaluating self-discharge consistency of lithium iron phosphate battery |
-
2013
- 2013-04-02 CN CN201310112268.XA patent/CN103235267B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000316235A (en) * | 1999-04-28 | 2000-11-14 | Japan Storage Battery Co Ltd | Method for restoring capacity of alkaline storage battery and charger for the alkaline storage battery |
| JP2003123851A (en) * | 2001-10-11 | 2003-04-25 | Japan Storage Battery Co Ltd | Residual capacity estimation method for lead-acid battery |
| CN102117937A (en) * | 2011-01-12 | 2011-07-06 | 合肥国轩高科动力能源有限公司 | Self-discharge screening method for lithium ion phosphate battery |
| CN102109580A (en) * | 2011-01-30 | 2011-06-29 | 白科 | Process for detecting self discharge of lithium iron phosphate battery |
| CN102508165A (en) * | 2011-10-20 | 2012-06-20 | 合肥国轩高科动力能源有限公司 | Method for evaluating self-discharge consistency of lithium iron phosphate battery |
Non-Patent Citations (1)
| Title |
|---|
| 283334352QQ: "自放电原因分析", 《百度文库》 * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104714178A (en) * | 2013-12-13 | 2015-06-17 | 北汽福田汽车股份有限公司 | Testing method for boundary conditions of battery charge-discharge |
| CN104714178B (en) * | 2013-12-13 | 2017-10-10 | 北汽福田汽车股份有限公司 | The method of testing of battery charging and discharging boundary condition |
| CN103683439A (en) * | 2014-01-09 | 2014-03-26 | 北京沃特优科技有限公司 | System and method for controlling charge of lithium battery pack |
| CN104979597A (en) * | 2015-06-26 | 2015-10-14 | 桐乡市众胜能源科技有限公司 | Lithium ion battery self-discharge method |
| CN106918785A (en) * | 2015-12-27 | 2017-07-04 | 深圳市沃特玛电池有限公司 | One kind detection self discharge of lithium iron phosphate battery method |
| CN106935890A (en) * | 2015-12-29 | 2017-07-07 | 中国电力科学研究院 | A kind of self-discharge characteristics evaluation method of flow battery system |
| CN106054086A (en) * | 2016-07-11 | 2016-10-26 | 深圳天珑无线科技有限公司 | Battery self-discharge detection method and apparatus |
| CN108061861B (en) * | 2017-11-29 | 2020-07-17 | 东莞市创明电池技术有限公司 | Screening method for self-discharge 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 |
| CN108061861A (en) * | 2017-11-29 | 2018-05-22 | 东莞市创明电池技术有限公司 | The screening technique of lithium ion battery self discharge |
| CN110488201A (en) * | 2019-07-03 | 2019-11-22 | 浙江锋锂新能源科技有限公司 | A kind of charge states of lithium ion battery electric discharge screening technique, system, storage medium |
| CN111103482A (en) * | 2019-12-16 | 2020-05-05 | 肇庆绿宝石电子科技股份有限公司 | Full-automatic test method and system for super capacitor |
| CN111923780A (en) * | 2020-07-06 | 2020-11-13 | 宝能(广州)汽车研究院有限公司 | Battery management method, battery system for vehicle and vehicle |
| CN112924874A (en) * | 2021-01-26 | 2021-06-08 | 同济大学 | Battery overcharge degree diagnosis method based on relaxation voltage curve |
| CN113296005A (en) * | 2021-04-25 | 2021-08-24 | 浙江超威创元实业有限公司 | Method for testing voltage drop of battery |
| CN113655390A (en) * | 2021-08-09 | 2021-11-16 | 湖北亿纬动力有限公司 | Analysis method for differential pressure fault of battery system |
| CN113655390B (en) * | 2021-08-09 | 2023-10-03 | 湖北亿纬动力有限公司 | Analysis method for differential pressure fault of battery system |
| CN113848489A (en) * | 2021-09-10 | 2021-12-28 | 欣旺达电动汽车电池有限公司 | Battery short circuit identification method and device and storage medium |
| CN113848489B (en) * | 2021-09-10 | 2024-03-19 | 欣旺达动力科技股份有限公司 | Short circuit identification method and device for battery and storage medium |
| CN114184969B (en) * | 2021-12-08 | 2023-11-28 | 蜂巢能源科技(无锡)有限公司 | Method and device for testing reversible self-discharge capacity loss of battery cell |
| CN114355212A (en) * | 2021-12-31 | 2022-04-15 | 珠海冠宇电池股份有限公司 | Battery self-discharge detection method and device, computer equipment and storage medium |
| CN114355212B (en) * | 2021-12-31 | 2023-10-31 | 珠海冠宇电池股份有限公司 | Battery self-discharge detection method, device, computer equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103235267B (en) | 2015-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103235267A (en) | Method for quickly and effectively comparing self-discharge rates of batteries | |
| CN102861726B (en) | Lithium secondary battery consistency screening method | |
| CN103178306B (en) | Equilibrium assembling method and equilibrium assembling system for lithium secondary battery | |
| CN104316877B (en) | A kind of self discharge detection method of ferric phosphate lithium cell | |
| CN104617339B (en) | Lithium ion battery group matching method | |
| CN107511340B (en) | A kind of lithium-ion-power cell sorting method for group matching | |
| CN102303023B (en) | Method for detecting and sorting self-discharge performance of lithium iron phosphate battery | |
| CN105510847B (en) | The screening technique of lithium ion battery consistency | |
| CN107275690B (en) | A kind of battery self discharge rapid detection method | |
| CN102508165B (en) | Method for evaluating self-discharge consistency of lithium iron phosphate battery | |
| CN101764259B (en) | Method for group matching of power lithium-ion rechargeable battery | |
| CN102901931B (en) | Method for screening lithium batteries with abnormal self discharge | |
| CN104269574B (en) | A kind of set of cells method for separating | |
| CN104218267B (en) | A kind of lithium ion battery divides appearance method for group matching | |
| CN104459558A (en) | Lithium ion battery screening method | |
| CN103008261A (en) | Method for sorting degrees of self-discharging of lithium ion batteries | |
| CN104084383A (en) | Self-discharge sorting process for lithium iron phosphate batteries | |
| CN103611692A (en) | Lithium iron phosphate power battery consistency matching screening method | |
| CN103293481A (en) | Lithium ion battery self-discharging quick detecting method | |
| CN102944849A (en) | Rapid battery capacity detecting method for lithium ion batteries | |
| CN103487758B (en) | A kind of lithium ion battery grouping method | |
| CN106054086A (en) | Battery self-discharge detection method and apparatus | |
| CN107377422B (en) | A kind of method for separating of single battery | |
| CN111190114B (en) | Accelerated testing method for long-cycle lithium iron phosphate battery for energy storage | |
| CN102901932B (en) | Process for detecting self-discharge of lithium batteries |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |