CN102637850A - Method and battery pole piece for reducing battery self-discharge and improving safety performance - Google Patents
Method and battery pole piece for reducing battery self-discharge and improving safety performance Download PDFInfo
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- CN102637850A CN102637850A CN2012101514395A CN201210151439A CN102637850A CN 102637850 A CN102637850 A CN 102637850A CN 2012101514395 A CN2012101514395 A CN 2012101514395A CN 201210151439 A CN201210151439 A CN 201210151439A CN 102637850 A CN102637850 A CN 102637850A
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- pole piece
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- battery pole
- edge
- utmost point
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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
Abstract
The invention discloses a method for reducing battery self-discharge and improving safety performance. The method comprises the following steps of: (1) shearing a battery pole piece coated with polar powder during the process of producing the battery pole piece; and (2) carrying out protection processing operation on the left side edge and right side edge of the sheared battery pole piece so as to form smooth outer surfaces at the two sides of the battery pole piece. Moreover, the invention further discloses a battery pole piece for reducing the battery self-discharge and improving the safety performance. According to the method and battery pole piece for reducing the battery self-discharge and improving the safety performance, the edge protection treatment can be conveniently and quickly carried out on the battery pole piece after a shearing process, loose polar powder at the edges of the battery pole piece is prevented from falling in a subsequent manufacturing process, so that the battery self-discharge problem caused by falling polar powder is avoided; and the polar powder is prevented from piercing a battery diaphragm, so that the safety performance of a battery is guaranteed, the improvement on the overall production quality of the battery is favored, and the method and the battery pole piece have significant production practical significance.
Description
Technical field
The present invention relates to the battery technology field; Particularly relate to a kind of reduce self-discharge of battery and improving safety can method and battery pole piece, can overcome that coming off appears in battery pole piece edge utmost point powder powder after the shearing in process of production and burr and influence that the self discharge and the security performance of battery caused.
Background technology
Lithium ion battery compare with the battery of other types such as plumbic acid, cadmium nickel have that specific capacity is big, operating voltage is high, charging rate is fast, operating temperature range is wide, have extended cycle life, volume is little, advantage such as in light weight.At present, be widely used in fields such as mobile phone, notebook computer, electric tool, and its range of application more and more widely, is the main direction of present each macrocell producer development.
At present; Lithium ion battery have voltage height, specific energy high, recycle often, advantage such as memory time is long; Not only on portable electric appts, be used widely like mobile phone, DV and laptop computer; And be widely used in big-and-middle-sized electrical equipment aspects such as electric automobile, electric bicycle and electric tool, therefore self discharge and the security performance to lithium ion battery requires increasingly high.
As the battery pole piece of the core component of lithium ion battery, quality requirement is also increasingly high for wherein, and the self discharge of battery and security performance depend on battery pole piece to a great extent.
Current, the dust in the lithium ion battery manufacture process has very big influence to the self discharge and the security performance of battery, therefore must the strict dust of controlling battery in the battery manufacture process.
There is the cutting operation to battery pole piece in electrodes of lithium-ion batteries in manufacture process, when shearing, the coated utmost point powder in battery pole piece edge can receive the effect of cutting knife and become loosening; In view of battery pole piece also will be proceeded follow-up coiling, assembly process; The utmost point powder of battery pole piece edge is easy to come off in these subsequent handling processes becomes dust, and for example the negative pole powder possibly get into the positive plate surface, and positive powder possibly get into the cathode pole piece surface; Therefore can cause the self discharge problem of battery; Also there is the risk that pierces through battery diaphragm in the utmost point powder that comes off simultaneously, thereby causes battery short circuit, influences the security performance of battery; In addition, also there is the risk that causes self-discharge of battery and pierce through battery diaphragm in the utmost point powder burr at battery pole piece edge, thereby causes battery short circuit, influences the security performance of battery.
Therefore; Develop a kind of technology in an urgent demand of battery production field at present; It can be handled after cutting operation battery pole piece quickly and easily; Prevent that the loosening utmost point powder in battery pole piece edge from coming off in subsequent manufacturing processes, thereby avoid because the self-discharge of battery problem that the utmost point powder that comes off is caused and prevent that the utmost point acne from wearing battery diaphragm guarantees the security performance of battery.
Summary of the invention
In view of this; The purpose of this invention is to provide a kind of method and battery pole piece that reduces self-discharge of battery and improving safety ability; It can carry out edge-protected processing to battery pole piece quickly and easily after cutting operation; Prevent that the loosening utmost point powder in battery pole piece edge from coming off in subsequent manufacturing processes, thereby avoid because the self-discharge of battery problem that the utmost point powder that comes off is caused and prevent that the utmost point acne from wearing battery diaphragm guarantees the security performance of battery; Help improving the production quality of battery, be of great practical significance.
For this reason, the invention provides a kind of method that reduces self-discharge of battery and improving safety ability, comprise step:
The first step: in the battery pole piece production process, the battery pole piece that is coated with utmost point powder is carried out shearing manipulation;
Second step: the processing operation is protected at the edge, the battery pole piece left and right sides after shearing, formed smooth battery pole piece two side external surfaces.
Wherein, in second step, the said protection that edge, the battery pole piece left and right sides after shearing is carried out is handled operation and is specially: the edge, the left and right sides to battery pole piece carries out compaction treatment.
Wherein, in second step, the said protection that edge, the battery pole piece left and right sides after shearing is carried out is handled operation and is specially: apply the last layer glue-line in said battery pole piece both sides of the edge respectively or superscribe one layer tape.
In addition, the present invention also provides a kind of battery pole piece that reduces self-discharge of battery and improving safety ability, includes battery pole piece main body 1, and edge, the left and right sides outer surface of said battery pole piece main body 1 has one deck utmost point bisque 3 respectively;
Edge, the left and right sides outer surface of said battery pole piece main body 1 also has one deck edge protection layer 2 respectively, and said edge protection layer 2 is positioned at the outside of said utmost point bisque 3.
Wherein, Said battery pole piece main body 1 front and back middle part includes and applies utmost point powder pole piece part 11; Said coating utmost point powder pole piece part has a blank pole piece foil part 12 respectively in both sides about in the of 11, and said edge protection layer 2 is positioned at the left and right sides outer surface of said coating utmost point powder pole piece part 11.
Wherein, said edge protection layer 2 is one deck glue-line or one layer tape.
Visible by above technical scheme provided by the invention; Compared with prior art; A kind of method and battery pole piece that reduces self-discharge of battery and improving safety ability provided by the invention, it can carry out edge-protected processing to battery pole piece quickly and easily after cutting operation, prevent that the loosening utmost point powder in battery pole piece edge from coming off in subsequent manufacturing processes; Thereby avoid because the self-discharge of battery problem that the utmost point powder that comes off is caused and prevent that the utmost point acne from wearing battery diaphragm; Guarantee the security performance of battery, help improving the production quality of battery, be of great practical significance.
Description of drawings
Fig. 1 is a kind of flow chart that reduces the method for self-discharge of battery and improving safety ability provided by the invention;
Fig. 2 is the front schematic view of the battery pole piece of existing process shearing;
Fig. 3 is a kind of front schematic view of battery pole piece when its side applies last layer thin adhesive layer as edge protection layer that reduces self-discharge of battery and improving safety ability provided by the invention;
Fig. 4 is a kind of front schematic view of battery pole piece when its side is enclosed with one layer tape as edge protection layer that reduces self-discharge of battery and improving safety ability provided by the invention;
Among the figure, 1 is the battery pole piece main body, and 11 for applying utmost point powder pole piece part, and 12 is blank pole piece foil part, and 2 is edge protection layer, and 21 is glue-line, and 22 is adhesive tape, and 3 is utmost point bisque.
Embodiment
In order to make those skilled in the art person understand the present invention program better, the present invention is done further detailed description below in conjunction with accompanying drawing and execution mode.
Referring to Fig. 1, Fig. 2, the invention provides a kind of method that reduces self-discharge of battery and improving safety ability, may further comprise the steps:
Step S101: in the battery pole piece production process, the battery pole piece that is coated with utmost point powder (positive powder or negative pole powder) is carried out shearing manipulation;
Step S102: behind shearing manipulation, the processing operation is protected at the edge, the battery pole piece left and right sides after shearing, formed smooth battery pole piece two side external surfaces;
Step S103: proceed subsequent handling operation (like battery pole piece coiling, battery assembly process) then to battery pole piece.
Need to prove that for step S101, the battery pole piece of existing lithium ion battery is behind the process shearing manipulation; The coated utmost point powder in battery pole piece edge can receive the effect of cutting knife and become loosening, forms the utmost point powder that comes off easily, in view of battery pole piece also will be proceeded follow-up coiling, assembly process; In these subsequent handling processes, the utmost point powder of battery pole piece edge is easy to come off on the one hand becomes dust, and for example the negative pole powder possibly get into the positive plate surface; Positive powder possibly get into the cathode pole piece surface; Promptly cause the both positive and negative polarity batch mixing, therefore can cause the self discharge problem of battery, also there is the risk that pierces through battery diaphragm in the utmost point powder that comes off simultaneously; Thereby cause battery short circuit, influence the security performance of battery; In addition, the utmost point powder of battery pole piece edge also forms burr on the other hand easily, referring to Fig. 2, also exists to cause self-discharge of battery and pierce through the risk of battery diaphragm, thereby causes battery short circuit, influences the security performance of battery.
In the present invention; In view of after step S101 carries out the shearing manipulation of battery pole piece; The utmost point powder burr that battery pole piece comes off on utmost point powder and the battery pole piece edge easily can impact the self discharge and the security performance of battery, and step S102 of the present invention protects the edge, the battery pole piece left and right sides after shearing and handles operation, is specially through eliminating utmost point powder to handle or cover utmost point powder and handle; Form smooth battery pole piece two side external surfaces; Overcome that battery pole piece left and right sides utmost point powder comes off in process of production and the self discharge problem brought, and the utmost point acne that come off wear battery diaphragm and the battery short circuit problem brought, guarantee the security performance of battery; In addition, because the battery pole piece both sides of the edge have formed smooth outer surface, thereby two side external surfaces of battery pole piece do not have the barrier film that utmost point powder burr pierces through battery, avoid the battery short circuit problem brought thus, have further ensured the security performance of battery.
For step S102, the said protection that edge, the battery pole piece left and right sides after shearing is carried out handle operation specifically can for: the edge, the left and right sides to battery pole piece carries out compaction treatment, up to forming smooth battery pole piece two side external surfaces.
In addition; The said protection that edge, the battery pole piece left and right sides after shearing is carried out handle operation can also for: apply last layer glue-line 21 (being preferably thin adhesive layer) in said battery pole piece both sides of the edge respectively or superscribe one layer tape 22, referring to Fig. 3, Fig. 4.
Therefore; On concrete the realization; The present invention can coat it through the coating one deck thin adhesive layer of the battery pole piece both sides of the edge after shearing or with adhesive tape; Make it in processes such as follow-up coiling, battery assembling, the utmost point powder difficult drop-off at battery pole piece edge, the burr that also can avoid fully simultaneously being formed by the battery pole piece shear history is to the influence of battery safety.
Need to prove that the present invention can also be other operations, handle or cover the processing of utmost point powder, make that forming smooth battery pole piece two side external surfaces gets final product as long as the utmost point powder that can become the battery pole piece both sides of the edge after shearing loose is eliminated utmost point powder.The present invention through to shear the back battery pole piece the edge protect processing, greatly the reduction self-discharge of battery of degree and the lifting battery security performance.
Therefore; For the present invention, it is through carrying out smooth treatment to battery pole piece through the edge after shearing, for example; Coat at the edge of battery pole piece coating one deck thin adhesive layer or with adhesive tape; Make to prevent the problem that the negative pole powder gets into positive plate surface and positive powder entering cathode pole piece surface by utmost point powder difficult drop-off in subsequent manufacturing processes that the battery pole piece edge is loosening, effectively reduce self-discharge of battery; Simultaneously, also can thoroughly avoid, avoid because barrier film pierces through to the influence of battery safety the security performance of lifting battery because shearing formed utmost point powder burr comes in contact with battery diaphragm.
Referring to Fig. 3, Fig. 4; Based on the invention described above provide a kind of reduce self-discharge of battery and improving safety can method; The present invention can also provide a kind of battery pole piece that reduces self-discharge of battery and improving safety ability; It includes battery pole piece main body 1, and said battery pole piece main body 1 is for the battery pole piece through cutting operation, in the lump referring to Fig. 2; The same with existing battery pole piece through shearing, edge, the left and right sides outer surface of said battery pole piece main body 1 of the present invention has the utmost point bisque 3 that one deck comes off easily and forms burr easily respectively.
In the present invention, referring to Fig. 3, Fig. 4, edge, the left and right sides outer surface of said battery pole piece main body 1 also has one deck edge protection layer 2 respectively, and said edge protection layer 2 is positioned at the outside of said utmost point bisque 3.
Referring to Fig. 3, Fig. 4; Said battery pole piece main body 1 front and back middle part includes and applies utmost point powder pole piece part 11; Said coating utmost point powder pole piece part has a blank pole piece foil part 12 respectively in both sides about in the of 11; On concrete the realization, said edge protection layer 2 is preferably the left and right sides outer surface that is positioned at said coating utmost point powder pole piece part 11.
In the present invention; Said edge protection layer is one deck glue-line 21 (being preferably thin adhesive layer) or one layer tape 22, is specially edge, said battery pole piece main body 1 left and right sides outer surface and is coated with one deck glue-line 21 (being preferably thin adhesive layer) or is enclosed with one layer tape 22.Certainly, according to user's needs, said edge protection layer can also help covering the material layer of the utmost point bisque at edge, the said battery pole piece left and right sides for other.
In the present invention; Said edge protection layer 2 can improve the loose utmost point powder in edge, the battery pole piece left and right sides; The burr that utmost point powder on the while built-in edge forms; Make battery pole piece follow-up battery pole piece reel and the battery assembling process in the utmost point powder problem that comes off can not take place, reduced the self discharge of battery, promoted the security performance of battery simultaneously.
Need to prove that for the battery pole piece of existing lithium ion battery, battery pole piece is behind the process shearing manipulation; The coated utmost point powder of battery pole piece left and right edges can receive the effect of cutting knife and become loosening, forms the utmost point powder that comes off easily, in view of battery pole piece also will be proceeded follow-up coiling, assembly process; In these subsequent handling processes, the utmost point powder of battery pole piece edge is easy to come off on the one hand becomes dust, and for example the negative pole powder possibly get into the positive plate surface; Positive powder possibly get into the cathode pole piece surface; Promptly cause the both positive and negative polarity batch mixing, therefore can cause the self discharge problem of battery, also there is the risk that pierces through battery diaphragm in the utmost point powder that comes off simultaneously; Thereby cause battery short circuit, influence the security performance of battery; In addition, the utmost point powder of battery pole piece edge also forms burr on the other hand easily, referring to Fig. 2, also exists to cause self-discharge of battery and pierce through the risk of battery diaphragm, thereby causes battery short circuit, influences the security performance of battery.
As stated; The present invention applies one deck thin adhesive layer through the edge, the battery pole piece left and right sides after shearing or with adhesive tape it is coated; Make it in processes such as follow-up coiling, battery assembling; The utmost point powder difficult drop-off at battery pole piece edge prevents the problem that the negative pole powder gets into positive plate surface and positive powder entering cathode pole piece surface, effectively reduces self-discharge of battery; Simultaneously, also can thoroughly avoid, avoid because barrier film pierces through to the influence of battery safety the security performance of lifting battery because shearing formed utmost point powder burr comes in contact with battery diaphragm.
In sum; Compared with prior art; A kind of method and battery pole piece that reduces self-discharge of battery and improving safety ability provided by the invention, it can carry out edge-protected processing to battery pole piece quickly and easily after cutting operation, prevent that the loosening utmost point powder in battery pole piece edge from coming off in subsequent manufacturing processes; Thereby avoid because the self-discharge of battery problem that the utmost point powder that comes off is caused and prevent that the utmost point acne from wearing battery diaphragm; Guarantee the security performance of battery, help improving the production quality of battery, be of great practical significance.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (6)
1. a method that reduces self-discharge of battery and improving safety ability is characterized in that, comprises step:
The first step: in the battery pole piece production process, the battery pole piece that is coated with utmost point powder is carried out shearing manipulation;
Second step: the processing operation is protected at the edge, the battery pole piece left and right sides after shearing, formed smooth battery pole piece two side external surfaces.
2. the method for claim 1 is characterized in that, in second step, the said protection that edge, the battery pole piece left and right sides after shearing is carried out is handled operation and is specially: the edge, the left and right sides to battery pole piece carries out compaction treatment.
3. the method for claim 1; It is characterized in that; In second step, the said protection that edge, the battery pole piece left and right sides after shearing is carried out is handled operation and is specially: apply the last layer glue-line in said battery pole piece both sides of the edge respectively or superscribe one layer tape.
4. a battery pole piece that reduces self-discharge of battery and improving safety ability is characterized in that include battery pole piece main body (1), edge, the left and right sides outer surface of said battery pole piece main body (1) has one deck utmost point bisque (3) respectively;
Edge, the left and right sides outer surface of said battery pole piece main body (1) also has one deck edge protection layer (2) respectively, and said edge protection layer (2) is positioned at the outside of said utmost point bisque (3).
5. battery pole piece as claimed in claim 4; It is characterized in that; Said battery pole piece main body (1) front and back middle part includes and applies utmost point powder pole piece part (11); Said coating utmost point powder pole piece part (11) both sides up and down has a blank pole piece foil part (12) respectively, and said edge protection layer (2) is positioned at the left and right sides outer surface of said coating utmost point powder pole piece part (11).
6. like claim 4 or 5 described battery pole pieces, it is characterized in that said edge protection layer (2) is one deck glue-line or one layer tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101514395A CN102637850A (en) | 2012-05-16 | 2012-05-16 | Method and battery pole piece for reducing battery self-discharge and improving safety performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101514395A CN102637850A (en) | 2012-05-16 | 2012-05-16 | Method and battery pole piece for reducing battery self-discharge and improving safety performance |
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| CN102637850A true CN102637850A (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101514395A Pending CN102637850A (en) | 2012-05-16 | 2012-05-16 | Method and battery pole piece for reducing battery self-discharge and improving safety performance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546432A (en) * | 2016-12-01 | 2018-01-05 | 上海奇谋能源技术开发有限公司 | A kind of method for improving lithium ion battery security |
| CN110370330A (en) * | 2019-07-24 | 2019-10-25 | 苏州安洁科技股份有限公司 | A kind of nanocrystalline die-cutting process |
| CN111180668A (en) * | 2019-12-30 | 2020-05-19 | 广州市广珠电池有限公司 | Section-coated lithium ion battery positive plate and preparation method thereof |
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| CN1212475A (en) * | 1997-09-19 | 1999-03-31 | 中国科学院化学研究所 | Nickel-hydrogen battery negative pole material and preparing method and use |
| 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 |
| JP2011159639A (en) * | 2011-05-23 | 2011-08-18 | Toyota Motor Corp | Electrode body, method for manufacturing the same, and lithium ion secondary battery |
| CN202103128U (en) * | 2011-07-08 | 2012-01-04 | 长沙业翔能源科技有限公司 | Electric core structure of square super capacitor or battery |
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2012
- 2012-05-16 CN CN2012101514395A patent/CN102637850A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212475A (en) * | 1997-09-19 | 1999-03-31 | 中国科学院化学研究所 | Nickel-hydrogen battery negative pole material and preparing method and use |
| 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 |
| JP2011159639A (en) * | 2011-05-23 | 2011-08-18 | Toyota Motor Corp | Electrode body, method for manufacturing the same, and lithium ion secondary battery |
| CN202103128U (en) * | 2011-07-08 | 2012-01-04 | 长沙业翔能源科技有限公司 | Electric core structure of square super capacitor or battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546432A (en) * | 2016-12-01 | 2018-01-05 | 上海奇谋能源技术开发有限公司 | A kind of method for improving lithium ion battery security |
| CN110370330A (en) * | 2019-07-24 | 2019-10-25 | 苏州安洁科技股份有限公司 | A kind of nanocrystalline die-cutting process |
| CN111180668A (en) * | 2019-12-30 | 2020-05-19 | 广州市广珠电池有限公司 | Section-coated lithium ion battery positive plate and preparation method thereof |
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Application publication date: 20120815 |