CN105319516A - A battery set-making and screening method - Google Patents
A battery set-making and screening method Download PDFInfo
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- CN105319516A CN105319516A CN201510821352.8A CN201510821352A CN105319516A CN 105319516 A CN105319516 A CN 105319516A CN 201510821352 A CN201510821352 A CN 201510821352A CN 105319516 A CN105319516 A CN 105319516A
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Abstract
The invention provides a battery set-making and screening method. The method comprises a step of charging and discharging batteries, obtaining the discharge capacities of the batteries and exporting the discharge capacity data; a step of using a voltage internal resistance tester to test the voltage internal resistance in set time and exporting the data; a step of using the voltage internal resistance tester to test the voltage internal resistance after set-time standing and exporting the data; a step of voltage difference calculation and capacity conversion; a step of equal-grade assembly in which the batteries of the same grade are collected for assembly after capacity conversion. Through the capacity conversion method, the problem that the environmental factors such as standing and temperature influence the battery capacity is solved and it is guaranteed that batteries put in storage all have the standard capacity; the complicated operation of set making is simplified, so that the cost can be reduced and the production efficiency is increased; the accuracy in the battery assembly process is improved and the service life of the batteries is greatly prolonged.
Description
Technical field
The invention belongs to field of lithium, relate more specifically to a kind of battery group gas-mixing screening method.
Background technology
The battery of different batches, because the time of classification warehouse-in is different, has some differences, wherein also comprises ambient temperature effect between batch.The capacity temperature influence of lithium ion battery, Four seasons change, the capacity that temperature difference obtains is also different, and the capacity that when environment temperature is low, (winter) equipment is derived is on the low side, and the capacity that during environment temperature height, (summer) equipment is derived is higher.The battery actual capacity in such 2 periods is mutually far short of what is expected, cannot directly combo use.
Because the difference of the some position of equipment and holder contacts actual situation, also have the resistance difference of battery itself, the voltage causing battery virtual voltage and equipment to show is inconsistent, if judged with a magnitude of voltage, has percentage of batteries to judge degradation by accident.The information of self-discharge of battery just can be obtained by screening process.
In existing patent, CN103823191A discloses a kind of Li-ion batteries piles that calculates by the method for residual capacity, can detect the voltage that battery is current and the relative change rate of present battery residual capacity and voltage when charging.According to the relative change rate of battery capacity during the different life-span and voltage, can obtain lithium ion battery be converted to normal conditions under equivalent charging times n, thus draw the access times of current lithium ion battery according to equivalent charging times n.By the one-to-one relationship of residual capacity, the available residual capacity of battery can be obtained again according to access times and battery.This patent is that the dump energy measurement after frequently using battery is forbidden and the method for employing.
CN103399274A the invention discloses a kind of method of testing of capacity of accumulator monolithic pole plate, the capacity of every block monolithic pole plate can be tested, battery terminal negative capacity forms by the capacity of all monolithic negative plates is accumulative, positive electrode capacity is added up by the capacity of all monolithic positive plates and obtains, again checking accumulator capacity can be completed by the capacity measuring monolithic pole plate, find out the minimum factor of constraint accumulator capacity, to revise the parameter error in battery designs between Theoretical Design and actual design, for battery designs provides reference.This invention solves in prior art cannot judge that positive electrode capacity or capacity of negative plates affect the technical matters of accumulator whole volume,
To sum up, also do not find that the voltage capacity how solving battery cell under different temperatures or environment in cell assembling processes is different at present and cause assembling process cannot the way to solve the problem of combo.
Summary of the invention
1, object of the present invention.
The present invention is different and cause assembling process cannot the problem of combo in order to solve the voltage capacity of battery cell under different temperatures in prior art or environment, and proposes a kind of battery group gas-mixing screening method.
2, the technical solution adopted in the present invention.
Battery group gas-mixing screening method, carry out in accordance with the following steps:
Step 1, partial volume
By the discharge and recharge to battery, obtain the discharge capacity of battery, and derive discharge capacity data;
Step 2, the internal resistance of survey voltage
Voltage internal resistance test device test voltage internal resistance is used and derived data in the stipulated time;
Step 3, test the internal resistance after straight
After shelving official hour, use voltage internal resistance test device test voltage internal resistance and derived data in the stipulated time;
Step 4, pressure reduction calculate and capacity conversion carries out according to following formula:
Pressure reduction reduction formula:
△V=V
1-V
2
△ V in formula: pressure reduction, V
1: shelve front voltage, V
2: shelve rear voltage;
Capacity conversion formula:
C
25=0.0014T
2+ 0.114T+0.875+C or C
25=0.0014T
c 2+ 0.107T
c+ C
C in formula
25: 25 DEG C of capacity, T: real time temperature, T
c: the temperature difference, C: equipment draws capacity;
Step 5, classification warehouse-in is carried out to the battery of different capabilities.
Further, described real time temperature T is being more than or equal to 15 DEG C, is less than or equal to 45 DEG C.
Further, also comprise step 6, same level assembling, rear assembling is got to the battery peer after carrying out capacity conversion.
Further, before described step 6, also comprise battery screening get rid of step, will brownout be chosen or high cell row is removed.
3, beneficial effect of the present invention.
The factor of the environment such as the present invention solves shelving by the conversion method of capacity, temperature affects the problem of the internal resistance of cell, makes warehouse-in battery be all normal capacity, simplifies the complex operations of combo, be conducive to reducing costs and enhancing productivity; The accuracy in battery assembling process can be improved, the serviceable life of the battery greatly improved.
Accompanying drawing explanation
Fig. 1 process flow diagram of the present invention.
Embodiment
In order to enable the auditor of Patent Office especially the public clearly understand technical spirit of the present invention and beneficial effect, applicant will elaborate below by way of example, but be not all the restriction to the present invention program to the description of embodiment, any conceive according to the present invention done be only pro forma but not substantial equivalent transformation and all should be considered as technical scheme category of the present invention.
Embodiment 1
Concrete battery group gas-mixing screening method comprises the steps:
1. partial volume, by the discharge and recharge to battery, obtain the discharge capacity of battery, data can export to Microsoft Excel.
2. survey voltage internal resistance, after lower cabinet, use the test of voltage internal resistance test device in the stipulated time, statistical conversion Microsoft Excel.
3. survey the voltage internal resistance after shelving, the voltage internal resistance after the stipulated time uses the test of voltage internal resistance test device to shelve, statistical conversion Microsoft Excel.
4. pressure reduction calculates and capacity conversion, in Microsoft Excel, carries out data preparation.
5. the data arranged, according to grade scale, are pressed different brackets separately rear warehouse-in by classification.
6. shipment is got, and gets the battery of same grade, surveys voltage internal resistance, chooses the battery of brownout (or high).
7. sort, according to combo requirement, after getting rid of the underproof battery of voltage, remaining power uses arbitrarily.
8.PACK, assembling
Wherein reduction formula:
Pressure reduction reduction formula:
△V=V
1-V
2
1. formula △ V: pressure reduction,
2. formula V
1: shelve front voltage,
3. formula V
2: shelve rear voltage
Capacity conversion formula:
C
25=0.0014T
2+0.114T+0.875+C
Or
C
25=0.0014T
C 2+0.107T
C+C
4. formula C
25: 25 DEG C of capacity
5. formula T: real time temperature
6. formula T
c: the temperature difference
The formula scope of application 15 DEG C≤T≤45 DEG C.
Battery partial volume of the present invention is complete, can obtain the capacity data of battery, through surveying voltage internal resistance, obtains magnitude of voltage and internal resistance value.Again through surveying voltage internal resistance after shelving, according to capacity, pressure reduction, these 3 conditions of internal resistance, divide cell grade according to grade scale mark, then by respective level warehouse-in.When shipment combo, the battery of some can be led out to screen, namely survey voltage internal resistance, by artificial or software, carry out combo according to the condition of combo.With the partial volume equipment of monitoring temperature, can Real-time Collection battery partial volume time temperature.Reduction formula, the capacity under different temperatures can be converted to the normal temperature capacity of 25 DEG C by this formula.Shelve, draw voltage difference by the voltage tester before and after shelving, judge the self discharge situation of battery.Classification, capacity shelves and the combo of cell grade require to be connected, as long as same grade is got in shipment.Screening, only need by surveying voltage internal resistance, chooses brownout (or high).
Embodiment 2
Battery group gas-mixing screening method comprises the steps:
1. partial volume equipment belt monitoring temperature, often propping up battery temperature all derives in tables of data.
2. the capacity under different temperatures can be converted to the normal temperature capacity of 25 DEG C by formula.
3. data processing needs partial volume software, computer and office software.
4. partial volume software has statistical conversion function.
5. voltage internal resistance test device is connected with computer, uses the software of customization to transform and exports to Microsoft Excel.
6. grade scale is the standard that enterprises judges certified products, will seek unification with according to combo.
7. the battery of same grade necessarily meets combo requirement, saves consideration capacity difference.
8. magnitude of voltage and inventory time have corresponding relation, just can determine scope by chart contrast.
Claims (4)
1. a battery group gas-mixing screening method, is characterized in that carrying out in accordance with the following steps:
Step 1, partial volume
By the discharge and recharge to battery, obtain the discharge capacity of battery, and derive discharge capacity data;
Step 2, the internal resistance of survey voltage
Voltage internal resistance test device test voltage internal resistance is used and derived data in the stipulated time;
Step 3, test shelve after voltage internal resistance
After shelving official hour, use voltage internal resistance test device test voltage internal resistance and derived data in the stipulated time;
Step 4, pressure reduction calculate and capacity conversion carries out according to following formula:
Pressure reduction reduction formula:
△V=V
1-V
2
△ V in formula: pressure reduction, V
1: shelve front voltage, V
2: shelve rear voltage;
Capacity conversion formula:
C
25=0.0014T
2+ 0.114T+0.875+C or C
25=0.0014T
c 2+ 0.107T
c+ C
C in formula
25: 25 DEG C of capacity, T: real time temperature, T
c: the temperature difference, C: equipment draws capacity;
Step 5, classification warehouse-in is carried out to the battery of different capabilities.
2. battery group gas-mixing screening method according to claim 1, is characterized in that: described real time temperature T is being more than or equal to 15 DEG C, is less than or equal to 45 DEG C.
3. battery group gas-mixing screening method according to claim 1 and 2, is characterized in that: also comprise step 6, same level assembling, get rear assembling to the battery peer after carrying out capacity conversion.
4. battery group gas-mixing screening method according to claim 3, is characterized in that: before described step 6, also comprise battery screening get rid of step, will choose brownout or high cell row is removed.
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| CN201510821352.8A CN105319516A (en) | 2015-11-24 | 2015-11-24 | A battery set-making and screening method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911477A (en) * | 2016-04-14 | 2016-08-31 | 合肥国轩高科动力能源有限公司 | Screening method of self discharging of power lithium ion battery |
| CN107271901A (en) * | 2016-04-08 | 2017-10-20 | 深圳市沃特玛电池有限公司 | A kind of lithium battery matches somebody with somebody shelves method |
| CN107450028A (en) * | 2017-07-20 | 2017-12-08 | 合肥国轩高科动力能源有限公司 | A kind of computational methods of lithium ion battery thermal power density |
| CN110031769A (en) * | 2019-04-24 | 2019-07-19 | 合肥国轩高科动力能源有限公司 | The battery pack capacity measurement method of lithium battery |
| CN110542863A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Power battery self-discharge rate detection method |
| CN110542864A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Thermodynamic detection method for self-discharge rate of lithium ion battery |
| CN112958487A (en) * | 2021-02-01 | 2021-06-15 | 中国电子科技集团公司第十八研究所 | Primary lithium primary battery screening and matching method |
| CN113571784A (en) * | 2021-07-23 | 2021-10-29 | 珠海冠宇电源有限公司 | Battery grouping method, battery grouping device and computer readable storage medium |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271901A (en) * | 2016-04-08 | 2017-10-20 | 深圳市沃特玛电池有限公司 | A kind of lithium battery matches somebody with somebody shelves method |
| CN105911477A (en) * | 2016-04-14 | 2016-08-31 | 合肥国轩高科动力能源有限公司 | Screening method of self discharging of power lithium ion battery |
| CN105911477B (en) * | 2016-04-14 | 2019-01-22 | 合肥国轩高科动力能源有限公司 | A kind of screening technique of power lithium-ion battery self discharge |
| CN107450028A (en) * | 2017-07-20 | 2017-12-08 | 合肥国轩高科动力能源有限公司 | A kind of computational methods of lithium ion battery thermal power density |
| CN110031769A (en) * | 2019-04-24 | 2019-07-19 | 合肥国轩高科动力能源有限公司 | The battery pack capacity measurement method of lithium battery |
| CN110031769B (en) * | 2019-04-24 | 2021-10-15 | 合肥国轩高科动力能源有限公司 | Method for calculating battery capacity of lithium battery |
| CN110542863A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Power battery self-discharge rate detection method |
| CN110542864A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Thermodynamic detection method for self-discharge rate of lithium ion battery |
| CN112958487A (en) * | 2021-02-01 | 2021-06-15 | 中国电子科技集团公司第十八研究所 | Primary lithium primary battery screening and matching method |
| CN113571784A (en) * | 2021-07-23 | 2021-10-29 | 珠海冠宇电源有限公司 | Battery grouping method, battery grouping device and computer readable storage medium |
| CN113571784B (en) * | 2021-07-23 | 2023-03-14 | 珠海冠宇电源有限公司 | Battery grouping method, battery grouping device and computer readable storage medium |
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Application publication date: 20160210 |