CN112751115A - Novel packaging structure, button battery and packaging method thereof - Google Patents

Novel packaging structure, button battery and packaging method thereof Download PDF

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Publication number
CN112751115A
CN112751115A CN202110109587.XA CN202110109587A CN112751115A CN 112751115 A CN112751115 A CN 112751115A CN 202110109587 A CN202110109587 A CN 202110109587A CN 112751115 A CN112751115 A CN 112751115A
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CN
China
Prior art keywords
cap
steel shell
cylinder
explosion
welding
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.)
Pending
Application number
CN202110109587.XA
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Chinese (zh)
Inventor
李泽荣
李念
沈立强
刘志伟
朱剑峰
田洪
卢志伟
梁家辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huizhou De Neng Battery Co ltd
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Huizhou De Neng Battery Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huizhou De Neng Battery Co ltd filed Critical Huizhou De Neng Battery Co ltd
Priority to CN202110109587.XA priority Critical patent/CN112751115A/en
Publication of CN112751115A publication Critical patent/CN112751115A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0422Cells or battery with cylindrical casing
    • H01M10/0427Button cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0431Cells with wound or folded electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/30Batteries in portable systems, e.g. mobile phone, laptop
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

The invention provides a button battery with a novel structure and a packaging method thereof. A lug and a winding core are arranged in the novel packaging structure, and the lug is connected with the upper end and the lower end of the winding core respectively; the pole ear at the upper end of the roll core is connected with the cover cap, and the pole ear at the lower end of the roll core is connected with the steel shell. The button cell adopts aluminum plastic film gluing or plastic part heat sealing, has reliable sealing, high yield, good reliability, small packaging deformation, high volume utilization rate and improved capacity and specific energy density. The explosion-proof technology adopted by the invention is an explosion-proof sheet which is a stamping part, when the air pressure in the battery is overlarge, an etching groove of the explosion-proof sheet is invalid, the battery is not sealed any more, the pressure is released, and the safety accidents of the rise of the internal pressure of the shell, the explosion generated by the expansion of the shell and the like can be effectively prevented.

Description

Novel packaging structure, button battery and packaging method thereof
Technical Field
The invention belongs to the technical field of battery materials and battery preparation, and particularly relates to a novel packaging structure, a button battery and a packaging method thereof.
Background
Most of button batteries on various common low-price electronic products in daily life are in a traditional disposable (non-rechargeable) type, and the button batteries are low in price and simple in processing technology. Nowadays, in order to meet the requirements of consumers on high endurance, high safety and individuality of electronic products, various large battery manufacturers gradually manufacture and produce novel rechargeable button batteries with higher energy density, various specifications and various materials. Due to the fact that the processing difficulty and technology of the novel button cell are continuously upgraded, the traditional processing technology touches the pain point of the upgrading of the novel button cell processing technology.
The traditional button cell processing technology is resistance welding which forms welding by thermally fusing a soldering lug and a cell shell by using the heat effect of resistance. Although the welding technology is convenient and low in cost, the defects are obvious, for example, the welding technology can only be used for welding of a single material, welding marks are not attractive, welding spots are not accurate in size and are prone to being oxidized and blackened, burrs are large, and the safety problem is easily influenced by large influence factors of equipment and personnel operation in the operation process, soldering lug falling, welding leg battery voltage reduction and the like. The novel button cell is generally applied to a circuit board in the processing process, and pins are required to be welded on the surface of the novel button cell. To the needs of different circuit boards, the form of welding pin is often various, and simultaneously, novel button cell leg is comparatively complicated.
In addition, when the button battery is abnormally charged and discharged or the positive electrode and the negative electrode are in short circuit, the temperature in the shell can be rapidly increased, the pressure in the shell can be increased and the shell can be expanded due to gas generated by the battery body, and finally the button battery can explode to cause safety accidents.
Therefore, in order to meet the market of the button cell with a large demand due to the rapid development of the electronic products, a new packaging structure and a new packaging process are urgently needed.
Disclosure of Invention
In view of the above, the present invention provides a novel package structure, a button cell and a package method thereof.
The technical scheme of the invention is as follows:
a novel packaging structure is characterized by comprising a steel shell, a cap, an explosion-proof sheet, a cylinder and sealant, wherein the cap is arranged at the upper end inside the cylinder; the block is equipped with annotates the liquid mouth, it is equipped with the explosion-proof piece to annotate liquid mouth top.
Furthermore, the explosion-proof sheet is symmetrically provided with etching grooves, the etching grooves are arranged on the explosion-proof sheet and are weak points of the structure, when the battery structure fails, the explosion-proof sheet structure fails, and gas is sprayed out from the weak points to release pressure.
Furthermore, the cylinder is a plastic cylinder or an aluminum-plastic film cylinder.
In the invention, the sealant needs to have the following characteristics: 1. high temperature resistance, and the creep temperature is more than or equal to 130 ℃; 2. the adhesive has stronger viscosity in a hot melting state and can play a role of a structural adhesive; 3. gas production can not occur or can be almost ignored under the hot melting state; 4. the injection molding shrinkage is small, the injection molding coating is attached to the surface of the steel shell cap, and the injection molding coating cannot be separated from the steel shell cap when cooled and shrunk; 5. has certain flame retardance.
A button battery is characterized by comprising the novel packaging structure, wherein a tab and a winding core are arranged in the novel packaging structure, and the tab is connected with the upper end and the lower end of the winding core respectively; the pole ear at the upper end of the roll core is connected with the cover cap, and the pole ear at the lower end of the roll core is connected with the steel shell.
A packaging method of a button cell is characterized by comprising the following steps:
s1, respectively packaging a cylinder with a steel shell and a cap;
s2, placing a roll core into a shell, and performing spot bottom welding;
s3, spot welding of a lug and a cap;
s4, sealing the cover cap and the plastic cylinder or the aluminum-plastic film through gluing or heat sealing;
s5, vacuumizing and injecting liquid under negative pressure, and injecting liquid through a liquid injection hole of the cap;
s6, welding and sealing the explosion-proof sheet and the cap through laser welding;
and S7, forming and grading to obtain the product.
Further, in step S1, the packaging method includes: taking a cylinder, coating glue on the inner wall, extruding a steel shell and a cap through a fixture tool, and curing sealant to complete the sealing among the steel shell, the cap and the cylinder;
further, in step S1, the packaging method includes: taking a hard plastic cylinder, extruding a steel shell and a cap through a fixture tool, and thermally melting the hard plastic through heat sealing to be adhered with the steel shell and the cap;
further, in step S1, the packaging method includes: and the steel shell cap is subjected to injection molding and glue coating, the steel shell and the cap are assembled with the hard plastic cylinder through the fixture tool, the glue coating on the surface of the steel shell cap is hot-melted through heat sealing, and the steel shell and the cap are adhered to complete sealing.
Further, in step S2, the spot-bottom welding method is any one of pin spot welding, resistance pressure welding, and laser spot welding.
Further, in step S3, the processing method includes any one of the following: resistance pressure welding is adopted from the inside, and laser welding is adopted from the outside.
The invention provides a novel-structure button battery and a core component thereof, wherein the novel-structure button battery does not adopt the traditional packaging mode (press rivet welding and physical extrusion sealing), and the novel-structure button battery adopts aluminum plastic film gluing or plastic piece heat sealing, which is a process route of the next-generation button battery. The button cell manufactured by the invention has the advantages of reliable sealing, high yield, good reliability, small packaging deformation, high volume utilization rate and capability of improving the capacity and the specific energy density.
The invention provides a button cell with a novel structure, a core component of the button cell and a novel material adopted by the core component, wherein the raw material part of the cell structure consists of a steel shell, a cover cap, an explosion-proof sheet, a cylinder and sealant, the steel shell cover cap, the cylinder and the sealant are sealed in a gluing or heat sealing mode, and the explosion-proof sheet is connected and sealed with the cover cap in a laser welding mode.
The core technology of the button cell with the novel structure is to seal the steel shell, the cap and the cylinder by gluing or heat sealing.
The liquid injection method adopted by the invention is liquid injection through the liquid injection hole, and negative pressure vacuumizing liquid injection is adopted during liquid injection.
The explosion-proof technology adopted by the invention is an explosion-proof sheet which is a stamping part, when the air pressure in the battery is overlarge, an etching groove of the explosion-proof sheet is invalid, the battery is not sealed any more, and the pressure is released.
The explosion-proof piece and the cap in the button cell with the novel structure are connected in a laser welding mode and matched to complete sealing.
The battery pile adopted by the invention is a winding core with a winding structure.
The button cell adopts aluminum plastic film gluing or plastic part heat sealing, has reliable sealing, high yield, good reliability, small packaging deformation, high volume utilization rate and improved capacity and specific energy density. The explosion-proof technology adopted by the invention is an explosion-proof sheet which is a stamping part, when the air pressure in the battery is overlarge, an etching groove of the explosion-proof sheet is invalid, the battery is not sealed any more, the pressure is released, and the safety accidents of the rise of the internal pressure of the shell, the explosion generated by the expansion of the shell and the like can be effectively prevented.
Drawings
FIG. 1 is a schematic structural diagram of the novel package structure of the present invention;
FIG. 2 is a schematic structural diagram of the rupture disk of the present invention;
fig. 3 is a schematic structural diagram of a button cell of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A novel packaging structure 10 is characterized by comprising a steel shell 1, a cap 2, an explosion-proof sheet 3, a cylinder 4 and a sealant 5, wherein the cap is arranged at the upper end inside the cylinder, the steel shell is arranged at the lower end inside the cylinder, the sealant is arranged by being clung to the inner wall of the cylinder, the sealant is arranged between the cap and the cylinder, and the sealant is arranged between the steel shell and the cylinder; the cap is provided with a liquid injection port 21, and an explosion-proof sheet 3 is arranged above the liquid injection port.
Furthermore, the explosion-proof sheet is symmetrically provided with etching grooves 31, the etching grooves are arranged on the explosion-proof sheet and are weak points of the structure, when the battery structure fails, the explosion-proof sheet structure fails, and gas is sprayed out from the weak points to release pressure.
Further, the cylinder is a plastic cylinder.
In the invention, the sealant needs to have the following characteristics: 1. high temperature resistance, and the creep temperature is more than or equal to 130 ℃; 2. the adhesive has stronger viscosity in a hot melting state and can play a role of a structural adhesive; 3. gas production can not occur or can be almost ignored under the hot melting state; 4. the injection molding shrinkage is small, the injection molding coating is attached to the surface of the steel shell cap, and the injection molding coating cannot be separated from the steel shell cap when cooled and shrunk; 5. has certain flame retardance.
Example 2
This embodiment provides a novel package structure 10 having the same structure as that of embodiment 1, except that the cylinder is an aluminum-plastic film cylinder.
Example 3
A button battery is characterized by comprising a novel packaging structure of embodiment 1 or embodiment 2, wherein a tab 7 and a winding core 8 are arranged in the novel packaging structure, and the tab is connected with the upper end and the lower end of the winding core respectively; the pole ear at the upper end of the roll core is connected with the cover cap, and the pole ear at the lower end of the roll core is connected with the steel shell.
Example 4
An embodiment 3 is a method for encapsulating a button cell, comprising the steps of:
s1, respectively packaging a cylinder with a steel shell and a cap;
s2, placing a roll core into a shell, and performing spot bottom welding;
s3, spot welding of a lug and a cap;
s4, sealing the cover cap and the plastic cylinder or the aluminum-plastic film through gluing or heat sealing;
s5, vacuumizing and injecting liquid under negative pressure, and injecting liquid through a liquid injection hole of the cap;
s6, welding and sealing the explosion-proof sheet and the cap through laser welding;
and S7, forming and grading to obtain the product.
Further, in step S1, the packaging method includes: and (3) taking the cylinder, coating the inner wall with glue, extruding the steel shell and the cap through a fixture tool, and curing the sealant to complete the sealing among the steel shell, the cap and the cylinder.
Further, in step S2, the method of spot-bottom welding is pin spot welding.
Further, in step S3, resistance pressure welding is used from the inside.
Example 5
This embodiment provides a method for packaging a button cell, which is the same as that in embodiment 3, except that in step S1, the method for packaging is as follows: and taking the hard plastic cylinder, extruding the steel shell and the cap through a fixture tool, and thermally melting the hard plastic through heat sealing to be adhered with the steel shell and the cap.
Further, in step S2, the spot-bottom welding method is resistance pressure welding.
Further, in step S3, resistance pressure welding is used from the inside.
Example 6
This embodiment provides a method for packaging a button cell, which is the same as that in embodiment 3, except that in step S1, the method for packaging is as follows: and the steel shell cap is subjected to injection molding and glue coating, the steel shell and the cap are assembled with the hard plastic cylinder through the fixture tool, the glue coating on the surface of the steel shell cap is hot-melted through heat sealing, and the steel shell and the cap are adhered to complete sealing.
Further, in step S2, the spot bottom welding method is laser spot welding.
Further, in step S3, the processing method is to use laser welding from the outside.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art. It should be noted that the technical features not described in detail in the present invention can be implemented by any prior art.

Claims (10)

1. A novel packaging structure is characterized by comprising a steel shell, a cap, an explosion-proof sheet, a cylinder and sealant, wherein the cap is arranged at the upper end inside the cylinder; the block is equipped with annotates the liquid mouth, it is equipped with the explosion-proof piece to annotate liquid mouth top.
2. The novel packaging structure of claim 1, wherein the explosion-proof sheet is symmetrically provided with etched grooves.
3. The novel packaging structure of claim 1, wherein the cylinder is a plastic cylinder or an aluminum-plastic film cylinder.
4. A button battery is characterized by comprising the novel packaging structure of any one of claims 1-3, wherein a tab and a winding core are arranged in the novel packaging structure, and the tab is connected with the upper end and the lower end of the winding core respectively; the pole ear at the upper end of the roll core is connected with the cover cap, and the pole ear at the lower end of the roll core is connected with the steel shell.
5. A packaging method of a button cell in claim 4, which is characterized by comprising the following steps:
s1, respectively packaging a cylinder with a steel shell and a cap;
s2, placing a roll core into a shell, and performing spot bottom welding;
s3, spot welding of a lug and a cap;
s4, sealing the cover cap and the plastic cylinder or the aluminum-plastic film through gluing or heat sealing;
s5, vacuumizing and injecting liquid under negative pressure, and injecting liquid through a liquid injection hole of the cap;
s6, welding and sealing the explosion-proof sheet and the cap through laser welding;
and S7, forming and grading to obtain the product.
6. The method for encapsulating a button cell according to claim 5, wherein in step S1, the method for encapsulating is as follows: and (3) taking the cylinder, coating the inner wall with glue, extruding the steel shell and the cap through a fixture tool, and curing the sealant to complete the sealing among the steel shell, the cap and the cylinder.
7. The method for encapsulating a button cell according to claim 5, wherein in step S1, the method for encapsulating is as follows: and taking the hard plastic cylinder, extruding the steel shell and the cap through a fixture tool, and thermally melting the hard plastic through heat sealing to be adhered with the steel shell and the cap.
8. The method for encapsulating a button cell according to claim 5, wherein in step S1, the method for encapsulating is as follows: and the steel shell cap is subjected to injection molding and glue coating, the steel shell and the cap are assembled with the hard plastic cylinder through the fixture tool, the glue coating on the surface of the steel shell cap is hot-melted through heat sealing, and the steel shell and the cap are adhered to complete sealing.
9. The method for encapsulating a button cell according to claim 5, wherein in step S2, the spot-bottom welding method is any one of pin spot welding, resistance pressure welding and laser spot welding.
10. The method for encapsulating a button cell according to claim 5, wherein in step S3, the processing method includes any one of the following: resistance pressure welding is adopted from the inside, and laser welding is adopted from the outside.
CN202110109587.XA 2021-01-27 2021-01-27 Novel packaging structure, button battery and packaging method thereof Pending CN112751115A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110109587.XA CN112751115A (en) 2021-01-27 2021-01-27 Novel packaging structure, button battery and packaging method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110109587.XA CN112751115A (en) 2021-01-27 2021-01-27 Novel packaging structure, button battery and packaging method thereof

Publications (1)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201789006U (en) * 2010-07-30 2011-04-06 关玉叶 Seal structure of cylindrical lithium battery
CN203589112U (en) * 2013-11-27 2014-05-07 浙江正电新能源有限公司 Explosion-proof valve device of battery cell
CN108461660A (en) * 2017-02-21 2018-08-28 斯沃奇集团研究和开发有限公司 The method of battery, particularly button cell and this battery of manufacture
CN109755421A (en) * 2019-03-12 2019-05-14 四川福来威新能源科技有限公司 Button cell and button cell closing lid method
CN109860445A (en) * 2019-01-10 2019-06-07 金能电池(东莞)有限公司 A kind of novel aluminum plastic film button cell
CN110993838A (en) * 2019-12-31 2020-04-10 广东微电新能源有限公司 Heat-sealing battery
CN111180616A (en) * 2020-01-19 2020-05-19 惠州市恒泰科技股份有限公司 Button battery and preparation process thereof
CN211088318U (en) * 2019-10-08 2020-07-24 重庆市紫建电子有限公司 Semimetal shell button cell
CN211480089U (en) * 2020-01-15 2020-09-11 广东中科瑞龙精密技术有限公司 Do benefit to button cell packaging structure who promotes assembly stability

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201789006U (en) * 2010-07-30 2011-04-06 关玉叶 Seal structure of cylindrical lithium battery
CN203589112U (en) * 2013-11-27 2014-05-07 浙江正电新能源有限公司 Explosion-proof valve device of battery cell
CN108461660A (en) * 2017-02-21 2018-08-28 斯沃奇集团研究和开发有限公司 The method of battery, particularly button cell and this battery of manufacture
CN109860445A (en) * 2019-01-10 2019-06-07 金能电池(东莞)有限公司 A kind of novel aluminum plastic film button cell
CN109755421A (en) * 2019-03-12 2019-05-14 四川福来威新能源科技有限公司 Button cell and button cell closing lid method
CN211088318U (en) * 2019-10-08 2020-07-24 重庆市紫建电子有限公司 Semimetal shell button cell
CN110993838A (en) * 2019-12-31 2020-04-10 广东微电新能源有限公司 Heat-sealing battery
CN211480089U (en) * 2020-01-15 2020-09-11 广东中科瑞龙精密技术有限公司 Do benefit to button cell packaging structure who promotes assembly stability
CN111180616A (en) * 2020-01-19 2020-05-19 惠州市恒泰科技股份有限公司 Button battery and preparation process thereof

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Application publication date: 20210504

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