CN103658069B - A kind of screening technique of lithium rechargeable battery - Google Patents
A kind of screening technique of lithium rechargeable battery Download PDFInfo
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- CN103658069B CN103658069B CN201210362609.4A CN201210362609A CN103658069B CN 103658069 B CN103658069 B CN 103658069B CN 201210362609 A CN201210362609 A CN 201210362609A CN 103658069 B CN103658069 B CN 103658069B
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Abstract
The present invention relates to a kind of screening technique of lithium rechargeable battery, comprise the following steps: (1). preliminary filling: (2). survey voltage after preliminary filling and laser incising Quick Response Code: (3). once aging: (4). read Quick Response Code and once aging rear survey voltage: (5). electricity mended by battery: (6). survey voltage and laser incising Quick Response Code after mending electricity: (7). secondary is aging: (8). read Quick Response Code and the aging rear survey voltage of secondary: (9). grouping system: (10).? voltage is surveyed and laser incising Quick Response Code: (11) after detecting. read Quick Response Code before shipment and shipment before measurement voltage.The present invention charges to different blanking voltage by multiple operation in the technological process of production, and after placing certain hour at a certain temperature, battery is screened by the point-to-point pressure drop of cell voltage, avoid bad voltage and micro-short circuit, short circuit hidden danger battery, increase substantially the security of lithium ion battery.
Description
Technical field
The present invention designs a kind of method of production of lithium ion battery, particularly relates to a kind of screening technique of lithium rechargeable battery.
Background technology
Lithium ion battery is the advantages such as energy density is high, output voltage is high, have extended cycle life, environmental pollution is little owing to having, and be applied widely, also have broad application prospects in the field such as electric automobile, Aero-Space in small size digital electronic product.The lithium ion battery safety problem of current report concentrates the small-scale lithium ion cell occurred on digital product, and compared with battery of mobile phone, cells in notebook computer is higher due to capacity, and the probability gone wrong is also relatively high; And electrokinetic cell large-scale on the vehicles or battery pack, its safety problem is more outstanding, and current safety problem has become the bottleneck of restriction lithium ion battery to maximization, energetic future development.
Summary of the invention
Object of the present invention is exactly for prior art Problems existing, provides a kind of screening technique of lithium rechargeable battery.
For achieving the above object, the present invention adopts following technical scheme:
A screening technique for lithium rechargeable battery, is characterized in that comprising the following steps:
(l). preliminary filling: charge on battery in the mode of constant-current charge to preliminary filling machine, by current set range between 0.1C5A-1C5A, blanking voltage is charged between 3.53V-3.90V scope in 60-240min time range, and normal temperature shelf 10-30min;
(2). survey voltage after preliminary filling and laser incising Quick Response Code: adopt the voltage after surveying voltage apparatus measurement preliminary filling, voltage is surveyed after preliminary filling, with 3.50V-3.90V range of voltages for certified products, battery is hidden danger product lower than 3.50V, voltage may cause high-pressure phenomena for electrolyte less higher than 3.90V battery, by underproof battery screening out;
(3). once aging: to be positioned over by battery in special ageing rack or ageing oven, its temperature arranges scope 25 DEG C within the scope of 45 DEG C, shelves 48-240 hour;
(4). read Quick Response Code and once aging rear survey voltage: adopt automatic code reader, to read after each battery preliminary filling after voltage raw value, aging rear survey voltage is carried out once again with survey voltage apparatus, voltage after measuring virtual voltage and preliminary filling also carries out voltage by the software of this code reading device and automatically subtracts each other, and draw voltage phase difference value, i.e. voltage difference, be certified products in 30mV by arranging voltage difference, exceed the part of standard 30mV as low pressure hidden danger battery, by defective battery screening out;
(5). electricity mended by battery: again mend electric preliminary filling by battery to preliminary filling machine, with electric current at 0.2C-0.5C scope constant-current constant-voltage charging to 4.2-4.40V scope, cut-off current is arranged: 0.01C-0.02C scope, shelves the time: 0-10min;
(6). survey voltage and laser incising Quick Response Code after mending electricity: adopt and survey voltage apparatus, measure the voltage after mending electricity, and voltage actual value laser code burner is revealed with the form body carving Quick Response Code, voltage is surveyed with 4.18-4.4V range of voltages for certified products after mending electricity, be voltage hidden danger battery lower than 4.18V, higher than 4.40V for overcharging battery, by defective battery screening out;
(7). secondary is aging: be positioned over by battery in special ageing rack or ageing oven, and its temperature arranges scope 25 DEG C within the scope of 45 DEG C, shelves 48-240 hour;
(8). read Quick Response Code and the aging rear survey voltage of secondary: adopt automatic code reader, after reading the rear voltage raw value of each battery benefit electricity, the aging rear survey voltage of secondary is carried out again with survey voltage apparatus, measure virtual voltage and mend the rear voltage of electricity and carry out voltage by the software of this code reading device and automatically subtract each other, and draw voltage phase difference value, i.e. voltage difference, be certified products in 40mV by arranging voltage difference, exceed the part of standard 40mV as low pressure hidden danger battery, by defective work battery screening out;
(9). grouping system: by battery on preliminary filling machine, with electric current at 0.5C-1C scope constant-current discharge to 2.5V-3.0V scope, shelve 5min, constant-voltage charge is to 4.20-4.40V scope again, cut-off current is arranged: 0.01C-0.02C scope, shelve 5min, then constant-voltage charge is to 3.7-4.0V scope, cut-off current is arranged: 0.01C-0.02C scope, shelves: 10min;
(10). survey voltage and laser incising Quick Response Code after detecting: adopt and survey voltage apparatus, measure the voltage after detecting and voltage actual value is carved ink recorder and reveal with the form body of Quick Response Code;
(11). read Quick Response Code before shipment and shipment before measurement voltage: adopt automatic code reader, to read after each battery detecting after voltage raw value, voltage is surveyed again with surveying voltage apparatus, measure virtual voltage and detect rear voltage and carry out voltage by the software of this code reading device and automatically subtract each other, and draw voltage phase difference value, i.e. voltage difference, be certified products in 20mV by arranging voltage difference, exceed the part of standard 20mV as low pressure hidden danger battery, by defective work battery screening out.
Described automatic code reader, its function is: identify 2 D code information, and by this information transmission to computer, computer can be processed.
Described laser code burner adopts laser to engrave information of voltage on battery surface.
Described preliminary filling machine, namely adopt blue strange BK-3512L/2A detecting box, this cabinet major function is capacity and the platform of sorting battery, separately has to the function of battery charging and discharging.
Described survey voltage apparatus, adopts RBM-200/NZY internal resistance voltage, and the major function of this equipment measures internal resistance and the voltage of battery.
Beneficial effect of the present invention: technical scheme provided by the invention for charge to different blanking voltage by multiple operation in the technological process of production, and after placing certain hour at a certain temperature, battery is screened by the point-to-point pressure drop of cell voltage, avoid bad voltage and micro-short circuit, short circuit hidden danger battery, increase substantially the security of lithium ion battery.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention.
Detailed description of the invention
As shown in Figure 1, the present invention includes the following step:
(1). preliminary filling: charge on battery in the mode of constant-current charge to preliminary filling machine, by current set range between 0.5C5A, charges to blanking voltage between 3.53V-3.90V scope in 120min time range, and normal temperature shelf 20min;
(2). survey voltage after preliminary filling and laser incising Quick Response Code: adopt the voltage after surveying voltage apparatus measurement preliminary filling, voltage is surveyed after preliminary filling, with 3.50V-3.60V range of voltages for certified products, battery is hidden danger product lower than 3.50V, voltage may cause high-pressure phenomena for electrolyte less higher than 3.90V battery, by underproof battery screening out;
(3). once aging: to be positioned over by battery in special ageing rack or ageing oven, its temperature is arranged within the scope of scope 40 DEG C, shelves 100 hours;
(4). read Quick Response Code and once aging rear survey voltage: adopt automatic code reader, to read after each battery preliminary filling after voltage raw value, aging rear survey voltage is carried out once again with survey voltage apparatus, voltage after measuring virtual voltage and preliminary filling also carries out voltage by the software of this code reading device and automatically subtracts each other, and draw voltage phase difference value, i.e. voltage difference, be certified products in 30mV by arranging voltage difference, exceed the part of standard 30mV as low pressure hidden danger battery, by defective battery screening out;
(5). electricity mended by battery: again mend electric preliminary filling by battery to preliminary filling machine, with electric current at 0.5C scope constant-current constant-voltage charging to 4.2-4.40V scope, cut-off current is arranged: 0.01C-0.02C scope, shelves the time: 5min;
(6). survey voltage and laser incising Quick Response Code after mending electricity: adopt and survey voltage apparatus, measure the voltage after mending electricity, and voltage actual value laser code burner is revealed with the form body carving Quick Response Code, voltage is surveyed with 4.18-4.4V range of voltages for certified products after mending electricity, be voltage hidden danger battery lower than 4.18V, higher than 4.40V for overcharging battery, by defective battery screening out;
(7). secondary is aging: be positioned over by battery in special ageing rack or ageing oven, and its temperature is arranged within the scope of scope 40 DEG C, shelves 100 hours;
(8). read Quick Response Code and the aging rear survey voltage of secondary: adopt automatic code reader, after reading the rear voltage raw value of each battery benefit electricity, the aging rear survey voltage of secondary is carried out again with survey voltage apparatus, measure virtual voltage and mend the rear voltage of electricity and carry out voltage by the software of this code reading device and automatically subtract each other, and draw voltage phase difference value, i.e. voltage difference, be certified products in 40mV by arranging voltage difference, exceed the part of standard 40mV as low pressure hidden danger battery, by defective work battery screening out;
(9). grouping system: by battery on preliminary filling machine, with electric current 0.5C scope constant-current discharge to 2.5V-3.0V scope, shelve 5min, constant-voltage charge is to 4.20-4.40V scope again, cut-off current is arranged: 0.02C scope, shelve: 5min, then constant-voltage charge is to 3.7-4.0V scope, cut-off current is arranged: 0.02C scope, shelves: 10min;
(10). survey voltage and laser incising Quick Response Code after detecting: adopt and survey voltage apparatus, measure the voltage after detecting and voltage actual value is carved ink recorder and reveal with the form body of Quick Response Code;
(11). read Quick Response Code before shipment and shipment before measurement voltage: adopt automatic code reader, to read after each battery detecting after voltage raw value, voltage is surveyed again with surveying voltage apparatus, measure virtual voltage and detect rear voltage and carry out voltage by the software of this code reading device and automatically subtract each other, and draw voltage phase difference value, i.e. voltage difference, be certified products in 20mV by arranging voltage difference, exceed the part of standard 20mV as low pressure hidden danger battery, by defective work battery screening out.
Claims (1)
1. a screening technique for lithium rechargeable battery, is characterized in that comprising the following steps:
(l). preliminary filling: charge on battery in the mode of constant-current charge to preliminary filling machine, by current set range between 0.1C5A-1C5A, blanking voltage is charged between 3.53V-3.90V scope in 60-240min time range, and normal temperature shelf 10-30min;
(2). survey voltage after preliminary filling and laser incising Quick Response Code: adopt the voltage after surveying voltage apparatus measurement preliminary filling, voltage is surveyed after preliminary filling, with 3.50V-3.90V range of voltages for certified products, battery is hidden danger product lower than 3.50V, voltage may cause high-pressure phenomena for electrolyte less higher than 3.90V battery, by underproof battery screening out;
(3). once aging: to be positioned over by battery in special ageing rack or ageing oven, its temperature arranges scope 25 DEG C within the scope of 45 DEG C, shelves 48-240 hour;
(4). read Quick Response Code and once aging rear survey voltage: adopt automatic code reader, to read after each battery preliminary filling after voltage raw value, aging rear survey voltage is carried out once again with survey voltage apparatus, voltage after measuring virtual voltage and preliminary filling also carries out voltage by the software of this code reading device and automatically subtracts each other, and draw voltage phase difference value, i.e. voltage difference, be certified products in 30mV by arranging voltage difference, exceed the part of standard 30mV as low pressure hidden danger battery, by defective battery screening out;
(5). electricity mended by battery: again mend electric preliminary filling by battery to preliminary filling machine, with electric current at 0.2C-0.5C scope constant-current constant-voltage charging to 4.2-4.40V scope, cut-off current is arranged: 0.01C-0.02C scope, shelves the time: 0-10min;
(6). survey voltage and laser incising Quick Response Code after mending electricity: adopt and survey voltage apparatus, measure the voltage after mending electricity, and voltage actual value laser code burner is revealed with the form body carving Quick Response Code, voltage is surveyed with 4.18-4.4V range of voltages for certified products after mending electricity, be voltage hidden danger battery lower than 4.18V, higher than 4.40V for overcharging battery, by defective battery screening out;
(7). secondary is aging: be positioned over by battery in special ageing rack or ageing oven, and its temperature arranges scope 25 DEG C within the scope of 45 DEG C, shelves 48-240 hour;
(8). read Quick Response Code and the aging rear survey voltage of secondary: adopt automatic code reader, after reading the rear voltage raw value of each battery benefit electricity, the aging rear survey voltage of secondary is carried out again with survey voltage apparatus, measure virtual voltage and mend the rear voltage of electricity and carry out voltage by the software of this code reading device and automatically subtract each other, and draw voltage phase difference value, i.e. voltage difference, be certified products in 40mV by arranging voltage difference, exceed the part of standard 40mV as low pressure hidden danger battery, by defective work battery screening out;
(9). grouping system: by battery on preliminary filling machine, with electric current at 0.5C-1C scope constant-current discharge to 2.5V-3.0V scope, shelve 5min, constant-voltage charge is to 4.20-4.40V scope again, cut-off current is arranged: 0.01C-0.02C scope, shelve 5min, then constant-voltage charge is to 3.7-4.0V scope, cut-off current is arranged: 0.01C-0.02C scope, shelves: 10min;
(10). survey voltage and laser incising Quick Response Code after detecting: adopt and survey voltage apparatus, measure the voltage after detecting and voltage actual value is carved ink recorder and reveal with the form body of Quick Response Code;
(11). read Quick Response Code before shipment and shipment before measurement voltage: adopt automatic code reader, to read after each battery detecting after voltage raw value, voltage is surveyed again with surveying voltage apparatus, measure virtual voltage and detect rear voltage and carry out voltage by the software of this code reading device and automatically subtract each other, and draw voltage phase difference value, i.e. voltage difference, be certified products in 20mV by arranging voltage difference, exceed the part of standard 20mV as low pressure hidden danger battery, by defective work battery screening out.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104624524B (en) * | 2014-12-26 | 2017-04-26 | 东莞市金源电池科技有限公司 | Screening method for lithium ion battery consistency grouping through voltage recovery difference |
| CN106654420B (en) * | 2015-10-28 | 2019-06-28 | 郑州比克电池有限公司 | Capacity of lithium ion battery method for separating |
| CN105903692B (en) * | 2016-05-19 | 2018-05-25 | 四川长虹电器股份有限公司 | Lithium ion battery conformity classification method |
| CN110867557A (en) * | 2018-08-10 | 2020-03-06 | 中山天贸电池有限公司 | Lithium ion battery two-dimensional code tracing method |
| CN109482521A (en) * | 2018-10-30 | 2019-03-19 | 江苏双登富朗特新能源有限公司 | Improve the self discharge screening technique of lithium ion battery combo consistency |
| CN109270469A (en) * | 2018-11-11 | 2019-01-25 | 湖南安德丰新能源科技有限公司 | A kind of lithium battery pressure drop detection device and detection method |
| CN111167748B (en) * | 2019-11-29 | 2022-05-27 | 荆门亿纬创能锂电池有限公司 | Battery screening method |
| CN112246691B (en) * | 2020-09-24 | 2022-05-31 | 天津普兰能源科技有限公司 | Method for selecting Li (M1-xFex) PO4/Li4Ti5O12 high-capacity battery |
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