CN101188284A - A method for improving the short circuit and micro short circuit resistance of battery - Google Patents
A method for improving the short circuit and micro short circuit resistance of battery Download PDFInfo
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- CN101188284A CN101188284A CNA2007101347122A CN200710134712A CN101188284A CN 101188284 A CN101188284 A CN 101188284A CN A2007101347122 A CNA2007101347122 A CN A2007101347122A CN 200710134712 A CN200710134712 A CN 200710134712A CN 101188284 A CN101188284 A CN 101188284A
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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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Abstract
The invention discloses a method which can enhance the capabilities of anti short circuit and anti micro short circuit. Gum is dipped at the edge of a pole group, the edge of membranes or the edge of a membrane bag. The gum forms a solid particle through drying, and blocks off pores of the membranes which are used to dip the gum, so that the membranes which are arranged at the surroundings of a position where burrs are provided become compact, and the burrs appear at the edge of an electrode. The burrs can not penetrate the membranes for avoiding the short circuit or the micro short circuit of a battery caused by that the burrs which appear at the edge of the electrode penetrate the membranes, thereby lowering phenomena that self discharging is increased, the capable of keeping charged electricity is lowered, ect. caused by the burrs of the electrode in the battery. For the gum is only impregnated at the edge of the membranes, the performance of most membranes in the middle are not changed, so that the performance of the battery can not be influenced. The invention has the advantage of simple processing technology, and can eliminate the short circuit or the micro short circuit of the battery caused by the burrs effectively.
Description
Technical field
The present invention relates to a kind of method that improves battery Short Circuit withstand and micro-short circuit ability.
Background technology
In battery manufacturing process, owing to the difference of the material of selecting, electrode manufacture craft, electrode parameter etc., burr phenomena can appear in electrode edge inevitably.As at MH-Ni, Cd-Ni, in the batteries such as Zn-Ni, nickel electrode matrix generally adopts nickel foam etc., electrode cut with circular flow in, many burrs that caused by the nickel foam fiber can appear in the edge, electrode such as adhered electrode in other types, in the sintered type electrode, the edge also can be owing to cutting, the slag phenomenon appears falling in turnover etc., also can make electrode edge burr occur, these electrodes that have burr are assembled in the battery, change at battery, in the immersion process of detection and electrolyte, these burrs penetrate barrier film, cause the battery micro-short circuit, thereby add the self discharge of macrocell, influence the normal use of battery.
For avoiding this phenomenon, in the production and design of battery, the method that adds thick skirt/dividing plate or adopt the good barrier film/dividing plate of compactness is adopted in general document introduction, but such method influences the power-performance and the capacity of battery on the one hand, and on the other hand, it is fine and close that barrier film becomes, gas permeability is variation relatively, thereby inner pressure of battery is raise, cause battery leakage, influence the normal use of battery.1994 24 (6) (24 volume the 6th phase) " battery " periodical 253-254 pages or leaves disclose " research of Ni/MH self-discharge of battery " literary composition of Wang Suqin etc., have introduced modify on the nickel electrode surface self discharge of reduction battery with polymeric coating layer and film.1993 " power technology " 17 (4) 25-27 disclose " research of metal hydride-nickel cell " literary composition of the auspicious clear grade of model, have introduced at electrode surface to be coated with pellicle reduction self discharge.More than two kinds of methods all be by suppressing the reaction speed of hydrogen, reduce the self discharge of Ni/MH battery, can not eliminating the micro-short circuit phenomenon that the battery burr causes on the nickel electrode surface, and complex process, cost is higher, is not suitable for producing in batches, also can other performances of battery be impacted.At present general battery production merchant adopts the method at electrode edge album leave adhesive tape, avoid burr to penetrate barrier film, but the method technology is loaded down with trivial details, and material cost and technology cost are higher.
Summary of the invention
The invention provides a kind of method that improves battery Short Circuit withstand and micro-short circuit ability, its treatment process is simple, can effectively avoid burr to penetrate barrier film, has thoroughly eliminated battery short circuit or micro-short circuit phenomenon that the battery burr causes.
The present invention has adopted following technical scheme: a kind of method that improves battery Short Circuit withstand and micro-short circuit ability, it is before the battery assembling, by at pole piece edge impregnation, utmost point group edge impregnation, the diaphragm edge of jacketed electrode is carried out impregnation, perhaps to the diaphragm bag edge impregnation of hold electrodes, make the barrier film of battery utmost point group or electrode edge form compacted zone, assembling after drying.
Describedly select according to battery variety with glue, variety classes is selected the glue of different qualities for use.In alkaline battery, describedly select PTFE emulsion, PVA solution, HPMC solution, CMC solution or PVDF solution for use with glue.
The present invention by at utmost point group edge, diaphragm edge or diaphragm bag edge impregnation, drying blocks the hole of glue formation solid particle dipping part separation membrane again, make electrode edge burr place barrier film on every side occur and become fine and close, burr can't penetrate barrier film, avoid the electrode edge burr to penetrate barrier film and cause battery short circuit or micro-short circuit, thereby reduce in the battery because phenomenons such as the self discharge increase that the electrode burr causes, retention of charge reductions.Owing to, do not change the performance of part barrier film broad in the middle, so can the performance of battery not impacted only at the diaphragm edge impregnation.Treatment process of the present invention is simple, can effectively eliminate battery short circuit or micro-short circuit phenomenon that the battery burr causes.
Embodiment
A kind of method that improves battery Short Circuit withstand and micro-short circuit ability of the present invention, it is before the battery assembling, by at pole piece edge impregnation, perhaps utmost point group edge impregnation, perhaps the diaphragm edge to jacketed electrode carries out impregnation, perhaps, make the barrier film of battery utmost point group or electrode edge form compacted zone, assembling after drying to the diaphragm bag edge impregnation of hold electrodes.Burr can't penetrate barrier film like this, thereby improves the retention of charge of battery.In the method, at first be the selection of glue, should select glue according to the character of battery, as batteries such as MH-Ni, Cd-Ni, Zn-Ni, be alkaline battery, so the glue of selecting is must alkaline resistance properties good, and can not generally select for use glue commonly used in the battery manufacturing process to get final product in the dissolving of alkaline solution the inside.Such glue has PTFE (polytetrafluoroethylene), PVA (polyvinyl alcohol), PVDF (Kynoar), HPMC (hydroxypropyl methylcellulose), CMC solution etc., and these glue can not produce big influence to the electrical property of battery.Corresponding acid cell need select acid resistance strong, does not dissolve in acid, battery performance is not had the glue of big influence.Because it is all relatively good generally to be used for the moisture absorption of battery diaphragm/dividing plate, get final product so utmost point group edge soaked in glue slightly, select the time and the pickup that flood according to the size of the size of battery or electrode surface area.Secondly, behind the utmost point group edge impregnation, carry out drying, the solid particle that produces after the glue drying is blocked the hole of requirement part barrier film, thereby stop up the passage that burr causes short circuit.Just the assembling of battery can have been carried out afterwards.
Battery utmost point groups such as MH-Ni, Cd-Ni, Zn-Ni have identical character, so the method all is suitable for these batteries.
Embodiment one:
Make 100 on a collection of MH-Ni45Ah storage battery, adopt identical pole plate, barrier film (surface density 58g/m
2) and assembly technology.50 PTFE emulsions that battery soaks solid content 60% at utmost point group edge wherein, the dipping width of utmost point group edge barrier film is 3～5mm, dries 2h then in 70 ℃ of baking ovens.Then two class batteries are assembled together, change into and performance test.Comparative result sees Table 1.
Table 1 utmost point group is handled the performance comparison with the battery that is untreated
| Battery is untreated | Treatment of battery | |
| Battery 0 is pressed, low pressure (only) | 3 | 0 |
| The discharge above average size of 1.2V (Ah) | 27.8 | 26.9 |
| Average discharge capacity (Ah) | 48.9 | 48.5 |
| Press (MPa) in battery charge is average | 0.25 | 0.25 |
Data after treatment, change in the testing process that 0 pressing does not appear in battery, the low pressure phenomenon as can be seen from table 1, and untreated battery then reaches 6%.Discharge capacity and the discharge platform of handling the back battery slightly reduce.There is not influence to pressing in the battery charge before and after handling.
Embodiment two:
Make the MH-Ni battery of a collection of 45Ah, divide 3 classes to handle and make, every class battery is made 50.The first kind adopts compactness barrier film (surface density 73g/m
2), utmost point group is not carried out impregnation and is handled; Second class adopts the lower barrier film (58g/m of surface density
2), soak 60% PTFE emulsion at utmost point group edge, carry out drying, assembling then; The 3rd class adopts the lower barrier film (58g/m of surface density
2), but whole barrier film all soaks 60% PTFE emulsion, carries out drying, assembling then; 3 class batteries adopt identical positive/negative plate, and the barrier film of employing is the barrier film of the same material making of same manufacturer production.Adopt identical system to change into, detect to this 3 class battery then, and detect inner pressure of battery, the results are shown in Table 2.
Table 2 adopts the battery performance contrast of different barrier films, different disposal method
| Classification | 1 | 2 | 3 |
| Barrier film surface density (g/m2) | 73 | 58 | 58 |
| Disposition | Be untreated | Utmost point group edge treated | Barrier film is all handled |
| The number of batteries (only) of 0 pressure, low pressure | 2 | 0 | 0 |
| Leakage number of batteries (only) | 0 | 0 | 4 0 |
| 1.2V above discharge average size (Ah) | 26.5 | 26.9 | 15.0 |
| Average discharge capacity (Ah) | 48.4 | 48.5 | 39.5 |
| Press (MPa) in battery charge is average | 0.35 | 0.25 | 1.25 |
Data by table 2 see, after barrier film was all handled, the number of batteries of leaking electrolyte reached 80%, and battery capacity obviously descends, and can not reach the capacity requirement of battery, press up to 1.25MPa in the battery charge, and be the main cause of revealing.After barrier film being carried out whole impregnations processing, the hole of barrier film is all stopped up, the gas that nickel electrode produces in the charging process can't arrive hydrogen storage electrode and carry out compound, cause inner pressure of battery to rise, and the systemic electrolyte content of barrier film reduces greatly, cause the internal resistance of cell to raise, discharge platform and discharge capacity descend.Adopt the interior pressure of the high barrier film of surface density slightly higher, but can not avoid fully in the battery because 0 pressure, low pressure phenomenon that burr causes.
Embodiment three:
A few class batteries with embodiment one, embodiment two mades, after discharging into final voltage 1.0V with 0.2C respectively, open circuit is stored 3 months (because the battery that barrier film is handled entirely is defective, not comparing) under identical environment, measures the voltage of storing the back battery.See Table 3.
All kinds of battery storage situation contrasts of table 3
| Classification | 1 | 2 | 3 |
| Barrier film surface density (g/m 2) | 73 | 58 | 58 |
| Disposition | Be untreated | Utmost point group edge treated | Be untreated |
| Store back 0 piezoelectricity pond quantity (only) | 3 | 0 | 8 |
| Store the back average voltage (except the 0 piezoelectricity pond, V) | 1.190 | 1.215 | 1.154 |
See that by table 3 the battery storage performance after the utmost point group edge treated is significantly better than battery untreated and that adopt the compactness barrier film.
Because batteries such as MH-Ni, Cd-Ni, Zn-Ni all adopt thin pole plate to make battery, in the battery production process inevitably burr phenomena can appear, the diaphragm type that adopts, performance requirement etc. are also identical or approaching, so this method all is suitable for this class battery.
Claims (3)
1. method that improves battery Short Circuit withstand and micro-short circuit ability, it is before the battery assembling, by at pole piece edge impregnation, utmost point group edge impregnation, the diaphragm edge of jacketed electrode is carried out impregnation, perhaps to the diaphragm bag edge impregnation of hold electrodes, make the barrier film of battery utmost point group or electrode edge form compacted zone, assembling after drying.
2. the method for raising battery Short Circuit withstand according to claim 1 and micro-short circuit ability is characterized in that describedly selecting according to battery variety with glue, and variety classes is selected the glue of different qualities for use.
3. the method for raising battery Short Circuit withstand according to claim 2 and micro-short circuit ability is characterized in that in alkaline battery, describedly selects PTFE emulsion, PVA solution, HPMC solution, CMC solution or PVDF solution for use with glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101347122A CN101188284A (en) | 2007-10-15 | 2007-10-15 | A method for improving the short circuit and micro short circuit resistance of battery |
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| CNA2007101347122A CN101188284A (en) | 2007-10-15 | 2007-10-15 | A method for improving the short circuit and micro short circuit resistance of battery |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005568A (en) * | 2010-10-20 | 2011-04-06 | 深圳市豪鹏科技有限公司 | Battery positive plate and manufacturing method thereof |
| CN102130320A (en) * | 2010-01-15 | 2011-07-20 | 三星Sdi株式会社 | Electrode assembly and secondary battery including the same |
| CN102272998A (en) * | 2008-11-27 | 2011-12-07 | 艾姆普罗斯株式会社 | Method for manufacturing secondary cell, and secondary cell |
| CN102299293A (en) * | 2011-07-22 | 2011-12-28 | 深圳市崧鼎科技有限公司 | Manufacturing method for battery electrode plates and battery manufactured by method |
| CN104538593A (en) * | 2014-12-11 | 2015-04-22 | 张家港智电芳华蓄电研究所有限公司 | Laminating nickel electrode for alkaline storage battery and preparation method of laminating nickel electrode |
| CN106654180A (en) * | 2016-12-29 | 2017-05-10 | 成都国珈星际固态锂电科技有限公司 | Battery pole piece and preparation method thereof and lithium-ion battery |
| CN111722129A (en) * | 2020-06-01 | 2020-09-29 | 国联汽车动力电池研究院有限责任公司 | Battery micro short circuit detection method and system |
| WO2021047505A1 (en) * | 2019-09-12 | 2021-03-18 | 比亚迪股份有限公司 | Battery separator, battery, and battery pack |
-
2007
- 2007-10-15 CN CNA2007101347122A patent/CN101188284A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102272998A (en) * | 2008-11-27 | 2011-12-07 | 艾姆普罗斯株式会社 | Method for manufacturing secondary cell, and secondary cell |
| CN102130320A (en) * | 2010-01-15 | 2011-07-20 | 三星Sdi株式会社 | Electrode assembly and secondary battery including the same |
| CN102130320B (en) * | 2010-01-15 | 2015-04-01 | 三星Sdi株式会社 | Electrode assembly and secondary battery including the same |
| CN102005568A (en) * | 2010-10-20 | 2011-04-06 | 深圳市豪鹏科技有限公司 | Battery positive plate and manufacturing method thereof |
| CN102299293A (en) * | 2011-07-22 | 2011-12-28 | 深圳市崧鼎科技有限公司 | Manufacturing method for battery electrode plates and battery manufactured by method |
| CN104538593A (en) * | 2014-12-11 | 2015-04-22 | 张家港智电芳华蓄电研究所有限公司 | Laminating nickel electrode for alkaline storage battery and preparation method of laminating nickel electrode |
| CN106654180A (en) * | 2016-12-29 | 2017-05-10 | 成都国珈星际固态锂电科技有限公司 | Battery pole piece and preparation method thereof and lithium-ion battery |
| WO2021047505A1 (en) * | 2019-09-12 | 2021-03-18 | 比亚迪股份有限公司 | Battery separator, battery, and battery pack |
| CN112582753A (en) * | 2019-09-12 | 2021-03-30 | 比亚迪股份有限公司 | Battery diaphragm, battery module, battery package and car |
| CN111722129A (en) * | 2020-06-01 | 2020-09-29 | 国联汽车动力电池研究院有限责任公司 | Battery micro short circuit detection method and system |
| CN111722129B (en) * | 2020-06-01 | 2023-08-15 | 国联汽车动力电池研究院有限责任公司 | Battery micro-short circuit detection method and system |
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Open date: 20080528 |