CN111554836A - Button cell - Google Patents

Button cell Download PDF

Info

Publication number
CN111554836A
CN111554836A CN202010454561.4A CN202010454561A CN111554836A CN 111554836 A CN111554836 A CN 111554836A CN 202010454561 A CN202010454561 A CN 202010454561A CN 111554836 A CN111554836 A CN 111554836A
Authority
CN
China
Prior art keywords
shell
battery
insulating layer
battery body
polar
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
CN202010454561.4A
Other languages
Chinese (zh)
Inventor
曾涛
涂健
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.)
Hunan Lifang New Energy Science and Technology Co Ltd
Original Assignee
Hunan Lifang New Energy Science and Technology 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 Hunan Lifang New Energy Science and Technology Co Ltd filed Critical Hunan Lifang New Energy Science and Technology Co Ltd
Priority to CN202010454561.4A priority Critical patent/CN111554836A/en
Publication of CN111554836A publication Critical patent/CN111554836A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/545—Terminals formed by the casing of the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention belongs to the technical field of batteries, and particularly relates to a button battery which comprises a first pole shell and a second pole shell, wherein the first pole shell and the second pole shell are connected to form a battery body, the first pole shell comprises a first metal layer and a first insulating layer, the first metal layer is arranged outside the battery body, the first insulating layer is contained in the battery body, a battery cell is arranged in the battery body, a reserved area is arranged on the first insulating layer, a first electrode leading-out end of the battery cell penetrates through the reserved area to be connected with the first metal layer, and a second electrode leading-out end of the battery cell is connected with the second pole shell. The invention obviously improves the energy density of the battery core, and when the battery core is heated or expands, the sealing position can be opened to release pressure, thereby avoiding the safety problems of explosion and the like of the battery, further improving the problem of high air pressure in the battery core, and effectively ensuring the safety performance of the battery because the shell of the battery does not deform or fold.

Description

Button cell
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a button battery.
Background
Lithium ion batteries are widely used in people's daily lives because of their advantages of long cycle life, high voltage, high energy density, small self-discharge, no memory effect, and wide working range. Moreover, with the coming of the 5G era and the rapid development of small-sized terminals in the market, such as TWS earphones, smart bracelets, smart watches and other electronic devices, people have increasingly demanded lithium ion batteries with small size, high safety performance and high energy density.
However, after a lot of design and research, the inventor finds that the existing button cell has at least the following defects: 1) the assembly structure of button cell of production in the industry at present is mostly nested each other by two metal casing, then uses mechanical external force extrusion or riveted mode to form the encapsulation, and such encapsulated mode reliability is low, and water proof effect is poor, very easily causes the risk of weeping, like the button cell who "a has mass flow ring carrier" that chinese patent discloses (the publication number is: CN206639838U), which adopts a packaging mode of pressing a pole shell and a sealing ring, and can not ensure the use safety of the battery; 2) the battery can not be ensured to pass safety tests specified by national standards such as combustion injection, thermal shock, overcharge and the like by being packaged in a mechanical external force extrusion or riveting mode, and when the battery cell is subjected to conditions such as high temperature, overcharge and the like, the internal gas production of the battery is severe, and the gas in the battery cell can not be discharged in time to greatly improve the internal pressure of the battery cell, so that the electronic terminal has the risk of explosion in the use process; 3) the cell energy density of the conventional button battery is not high, so that the long-time cruising ability of the electronic terminal is seriously influenced; 4) the existing button battery cannot effectively coordinate the relationship between the battery appearance and the cell energy density, the good matching performance of the button battery and electronic equipment is seriously influenced, and the universality of the button battery is reduced; 5) the conventional button battery cannot effectively protect an electrode leading-out end of a battery core, so that the risk of battery damage is increased, and the safety of the battery is greatly reduced.
Therefore, a new button cell is needed to solve the above problems.
Disclosure of Invention
The invention aims to: aiming at the defects of the prior art, the button cell is high in reliability, good in stability, strong in universality, compact in structure, high in energy density and good in safety performance, the problem of high air pressure in the cell is solved, the relation between the appearance of the cell and the energy density of the cell is effectively coordinated, and the electrode leading-out end of the cell is effectively protected.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a button cell, includes first polar shell and second polar shell, first polar shell with the second polar shell is connected and is formed battery body, first polar shell includes first metal level and first insulation layer, first metal level set up in battery body's outside, first insulation layer accept in battery body's inside, battery body's inside is provided with electric core, first insulation layer is provided with the dead zone, the first electrode of electric core is drawn forth the end and is passed the dead zone with first metal layer is connected, the second electrode of electric core draw forth the end with the second polar shell is connected. Because first polar shell includes first metal level and first insulation layer, first metal level sets up outside the battery body, the shell of battery can not produce the problem of deformation or fold has been ensured, first insulation layer sets up within the battery body, the problem of avoiding leading to the fact the short circuit between first polar shell and the second polar shell has been played, and, the first insulation layer of first polar shell can form the encapsulation through the mode such as hot melt is sealed or the rubber coating is sealed with the second polar shell, when electric core is heated or take place flatulence scheduling problem, the seal position can strut and carry out the pressure release, be unlikely to make the battery take place safety problem such as explosion, thereby the inside problem of high atmospheric pressure that appears of electric core has been improved effectively. In addition, directly set up electric core and electrolyte in battery body's inside, can greatly strengthen the energy density of electric core. And the hollow area that the first insulating layer set up is used for switching on first electrode leading-out terminal and first metal level, and first electrode leading-out terminal and second electrode leading-out terminal all hold in the battery body, and the first insulating layer of hollow area week side has played the insulating protection effect to first metal level, and foretell design has protected the electrode leading-out terminal of electric core effectively, has guaranteed the outward appearance of battery level and smooth to the commonality and the security of battery have been improved remarkably.
Further, first metal level forms has arc chamfer, arc chamfer can reduce the roughness of first utmost point shell and improve the smoothness of first utmost point shell, first metal level forms through modes such as punching press or bending arc chamfer.
Further, the first pole shell is provided with a first accommodating cavity, the second pole shell is provided with a second accommodating cavity, the first accommodating cavity is communicated with the second accommodating cavity, the battery core is accommodated in the first accommodating cavity and the second accommodating cavity, and the first accommodating cavity and the second accommodating cavity can effectively increase the volume for accommodating the bare battery core, so that the energy density of the battery core and the capacity of the battery are greatly enhanced.
Further, the volume of the first metal layer is V1The volume of the first insulating layer is V2The volume of a reserved space arranged on the first insulating layer is V3Respectively satisfy the relational expressions: v is more than or equal to 1.21/V2≤3；5≤V2/V3Less than or equal to 10, thereby effectively ensuring the rigidity of the first pole shell.
Further, the battery cell comprises a positive plate, a negative plate and a diaphragm, the positive plate, the diaphragm and the negative plate are sequentially stacked and wound in the same direction to form a winding battery cell, and the battery cell is designed to be the winding battery cell, so that the energy density of the battery cell can be remarkably improved.
Further, the first pole piece is made of a steel-plastic film, the second pole piece is made of a steel-plastic film or a metal, when the first pole piece is made of a steel-plastic film, the first pole piece is only provided with a first metal layer and a first insulating layer, the first metal layer and the first insulating layer are tightly combined, the first metal layer is made of a metal foil and can be a pure metal foil or an alloy foil, and the first insulating layer is made of one or a combination of more of polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyphenylene oxide and polysulfone. When the material of first polar shell is the plastic film of steel, the plastic film not only can improve the problem of the inside high atmospheric pressure that appears of electric core, improves the security of battery, can also make first polar shell more frivolous to the energy density of reinforcing electric core.
Further, the first pole piece and the second pole piece can be formed by stamping through a shell stamping die.
Furthermore, the thickness of the first polar shell is 10-150 μm, and the thickness of the second polar shell is 10-1500 μm, so that the rigidity of the first polar shell and the second polar shell is effectively guaranteed.
The second pole shell is made of a steel-plastic film and comprises a second metal layer and a second insulating layer, the first insulating layer and the second insulating layer are connected in a hot melting mode to form the battery body, the second metal layer is made of a pure metal foil or an alloy foil, the second insulating layer is made of one or a combination of multiple materials of polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyphenyl ether and polysulfone, the second insulating layer is provided with a reserved area for enabling the leading-out end of the second electrode to be connected and conducted with the second pole shell, the second insulating layer is contained in the battery body, sealing positions of the first insulating layer and the second insulating layer can be unfolded to release pressure, the phenomenon that the battery explodes is avoided, and the problem of high air pressure inside the battery core is effectively solved.
Further, when the material of the second polar shell is a steel plastic film, the thickness of the second polar shell is 10-150 μm.
Furthermore, the first pole shell is provided with a first flange, the second pole shell is provided with a second flange, the first flange and the second flange are connected to form the battery body, the first pole shell can be formed by stamping or bending and the like, the second pole shell can be formed by stamping or bending and the like, the first flange and the second flange can reduce the packaging difficulty of the button battery, enhance the energy density of the battery core, and reduce the occupied space of the first pole shell and the second pole shell.
Further, a plane packaging area is formed when the first flanging and the second flanging are connected, and the plane packaging area is parallel to the horizontal plane.
Further, the first flange and the second flange may be bent toward the first pole case together or bent toward the second pole case together.
Further, the material of second utmost point shell is the metal, the outer wall of second utmost point shell is provided with the viscose layer, first insulation layer with the viscose layer is connected and is formed battery body, first utmost point shell part surrounds the second utmost point shell, wherein, the viscose layer has insulating nature, and the viscose layer is acceptd in battery body's inside, and the seal position on first insulation layer and viscose layer can strut and carry out the pressure release, has avoided the phenomenon that the battery explodes to the problem of the inside high atmospheric pressure that appears of electric core has been improved effectively.
Further, when the material of the second polar shell is metal, the thickness of the second polar shell is 10-1500 μm.
Further, when the material of the second polar shell is metal, an insulating pad is arranged on the inner wall of the second polar shell.
Further, when the material of the second polar shell is metal, a surface insulating layer may be disposed on the outer wall of the second polar shell, the material of the surface insulating layer is one or a combination of more of polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyphenylene oxide, and polysulfone, and the first insulating layer and the surface insulating layer are thermally fused to form the battery body.
Further, the material of the second polar shell is a material with the density of more than or equal to 2.7g/cm3The pure metal of (2).
Further, the second pole shell is made of a material with the density of more than 2.7g/cm3The alloy of (1).
Further, the thickness of the first pole shell is H, the thickness of the second pole shell is K, and the relation is satisfied: K/H is more than or equal to 2 and less than or equal to 10, so that the rigidity of the first polar shell and the second polar shell is effectively guaranteed.
Further, the first pole piece is formed with a first plane and a first inclined plane, the second pole piece is formed with a second plane and a second inclined plane, the first inclined plane and the second inclined plane are connected to form the battery body, the first plane and the second plane are parallel to each other, and the first inclined plane and the second inclined plane are used for enabling the first pole piece and the second pole piece to abut against each other during assembly, so that the packaging sealing performance of the battery body and the appearance smoothness of the battery body are improved, and wrinkles are prevented from being formed on the surface of the first pole piece.
Further, the first pole piece can be formed through modes such as punching press or bending the first plane with first inclined plane, the second pole piece can be formed through modes such as punching press or bending the second plane with the second inclined plane, the first plane with the contained angle on first inclined plane is A, the second plane with the contained angle on second inclined plane is B, satisfies the relational expression respectively: 90 degrees < A < 120 degrees; b is more than or equal to 60 degrees and less than 90 degrees; and the A + B is 180 degrees, so that the packaging sealing performance of the battery body and the rigidity of the first pole shell and the second pole shell are effectively guaranteed.
The invention has the beneficial effects that: 1) the battery comprises a first pole shell and a second pole shell, wherein the first pole shell and the second pole shell are connected to form a battery body; 2) the first insulating layer is arranged in the battery body, when the battery core is heated or expands and the like, the sealing position of the first insulating layer can be spread to release pressure, so that the safety problems of battery explosion and the like are avoided, and the problem of high air pressure in the battery core is effectively solved; 3) the battery core and the electrolyte are directly arranged in the battery body, so that the energy density of the battery core can be greatly enhanced, and the long-time cruising ability of the electronic terminal is ensured; 4) the first insulating layer is provided with the dead zone, the first electrode of electricity core is drawn forth the end and is passed the dead zone and be connected with first metal layer, the second electrode of electricity core is drawn forth the end and is connected with the second pole shell, the dead zone that the first insulating layer set up is used for switching on first electrode and draws forth end and first metal level, first electrode is drawn forth end and second electrode and is drawn forth the end and all hold within the battery body, the first insulating layer of dead zone week side has played the insulation protection effect to first metal level, the battery body has not only protected the electrode of electricity core effectively and has drawn forth the end, the outward appearance of battery is guaranteed to level and smooth, can also make button cell and electronic equipment well match, thereby the commonality and the security of battery have been showing and have been improved.
Drawings
Fig. 1 is one of front views of embodiment 1 of the present invention.
Fig. 2 is a second front view of embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 5 is a schematic structural diagram of a first pole case according to embodiment 3 of the present invention.
Fig. 6 is a schematic structural diagram of a second pole piece in embodiment 3 of the invention.
Wherein: 1-a first pole shell; 2-a second pole shell; 3-a battery body; 4-electric core; 11-a first metal layer; 12-a first insulating layer; 13-leaving a vacant area; 14-a first flange; 15-a first plane; 16-a first bevel; 21-a second metal layer; 22-a second insulating layer; 23-second flanging; 24-a second plane; 25-a second bevel; 41-first electrode lead-out; 42-second electrode lead-out.
Detailed Description
As used in this specification and the appended claims, certain terms are used to refer to particular components, and it will be appreciated by those skilled in the art that a manufacturer may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail with reference to the accompanying drawings 1 to 6 and specific examples, but the present invention is not limited thereto.
Example 1
The utility model provides a button cell, including first polar shell 1 and second polar shell 2, first polar shell 1 and second polar shell 2 are connected and are formed battery body 3, first polar shell 1 includes first metal level 11 and first insulation layer 12, first metal level 11 sets up in the outside of battery body 3, first insulation layer 12 is acceptd in the inside of battery body 3, the inside of battery body 3 is provided with electric core 4, first insulation layer 12 is provided with stays the district 13, the first electrode of electric core 4 is drawn forth end 41 and is passed and stays the district 13 and be connected with first metal level 11, the second electrode of electric core 4 is drawn forth end 42 and is connected with second polar shell 2.
Wherein, the first electrode shell 1 is a positive electrode shell, the second electrode shell 2 is a negative electrode shell, the first electrode leading-out end 41 is a positive electrode leading-out end, the second electrode leading-out end 42 is a negative electrode leading-out end, the first goldThe material of the metal layer 11 has the conductivity of more than or equal to 3.78 × 107S/m pure metal foil, the material of the first insulating layer 12 is one of polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyphenylene oxide and polysulfone.
Specifically, the first pole shell 1 is formed with a first accommodating cavity, the electric core 4 and the electrolyte are accommodated in the first accommodating cavity, the electric core 4 comprises a positive plate, a negative plate and a diaphragm, the first electrode leading-out end 41 is connected with the positive plate and the first metal layer 11 respectively, and the second electrode leading-out end 42 is connected with the negative plate and the second pole shell 2 respectively.
Preferably, the positive plate, the diaphragm and the negative plate are sequentially stacked and wound in the same direction to form a winding battery cell, the winding battery cell and the electrolyte are accommodated in the first accommodating cavity, and the energy density of the battery cell can be greatly improved by the winding battery cell.
Preferably, the volume of the first metal layer 11 is V1The volume of the first insulating layer 12 is V2The volume of the empty space 13 is V3Respectively satisfy the relational expressions: v is more than or equal to 21/V2≤3；8≤V2/V3Less than or equal to 9, thereby effectively ensuring the rigidity of the first pole shell 1.
Preferably, the first electrode shell 1 and the second electrode shell are made of a steel plastic film, the first electrode shell 1 only has a first metal layer 11 and a first insulating layer 12, the second electrode shell 2 only has a second metal layer 21 and a second insulating layer 22, the first metal layer 11 and the second metal layer 21 are made of the same material, the first insulating layer 12 and the second insulating layer 22 are thermally fused to form the battery body 3, the second insulating layer 22 is provided with a void region having the same volume as the void region 13 for connecting and conducting the second electrode lead-out end 42 and the second electrode shell 2, the first insulating layer 12 and the second insulating layer 22 are accommodated in the battery body, because the first insulating layer 12 and the second insulating layer 22 are thermally fused, when the battery core 4 is subjected to high temperature, overcharge and other conditions, the internal gas generation of the battery is likely to be serious, the sealing positions of the first insulating layer 12 and the second insulating layer 22 can be spread, the phenomenon of battery explosion is avoided, and the problem of high air pressure in the battery core 4 is effectively solved.
Preferably, the thickness of the first pole shell 1 is 10-100 μm, the thickness of the second pole shell 2 is 10-100 μm, and the first pole shell 1 and the second pole shell 2 are relatively light and thin, so that the ratio of the battery cell 4 to the battery can be improved, and the energy density of the battery cell is greatly enhanced.
Preferably, the first pole shell 1 is formed with a first flanging 14, the second pole shell 2 is formed with a second flanging 23, the first flanging 14 and the second flanging 23 are connected to form the battery body 3, wherein the first flanging 14 and the second flanging 23 can reduce the packaging difficulty of the button battery.
Example 2
The difference between this embodiment and embodiment 1 is, second pole shell 2 is formed with the second and holds the chamber, first chamber intercommunication that holds in the second holds the chamber, electric core 4 holding holds the chamber in first chamber and the second of holding, first chamber and the second of holding holds the chamber and can increase the volume of placing naked electric core effectively, make electric core 4's volume want the bulky than electric core 4 of embodiment 1, thereby greatly strengthened the energy density of electric core and the capacity of battery, and simultaneously, first turn-ups 14 and second turn-ups 23 are formed with the plane encapsulation district, the plane encapsulation of battery is more stable than the side encapsulation.
Preferably, the first flanging 14 and the second flanging 23 are both folded by 90 degrees, and the first flanging 14 and the second flanging 23 are bent towards the second pole piece housing 2 together, so that the occupied space of the first pole piece housing 1 and the occupied space of the second pole piece housing 2 are reduced, and the energy density of the battery cell is enhanced.
Preferably, first metal level 11 and second metal level 21 all are formed with the arc chamfer, and the roughness of first polar shell 1 and second polar shell 2 can be reduced to the arc chamfer, improves the smoothness of first polar shell 1 and second polar shell 2, has ensured the security of battery outward appearance.
The other structures of this embodiment are the same as those of embodiment 1, and are not described herein again.
Example 3
The utility model provides a button cell, including first polar shell 1 and second polar shell 2, first polar shell 1 and second polar shell 2 are connected and are formed battery body 3, first polar shell 1 includes first metal level 11 and first insulation layer 12, first metal level 11 sets up in the outside of battery body 3, first insulation layer 12 is acceptd in the inside of battery body 3, the inside of battery body 3 is provided with electric core 4, first insulation layer 12 is provided with stays the district 13, the first electrode of electric core 4 is drawn forth end 41 and is passed and is stayed district 13 and be connected with first metal level 11, the second electrode of electric core 4 is drawn forth end 42 and is connected with second polar shell 2, the material of second polar shell 2 is the metal.
Wherein the first electrode shell 1 is a positive electrode shell, the second electrode shell 2 is a negative electrode shell, the first electrode leading-out terminal 41 is a positive electrode leading-out terminal, the second electrode leading-out terminal 42 is a negative electrode leading-out terminal, and the material of the first metal layer 11 has an electric conductivity greater than or equal to 3.78 × 107The S/m pure metal foil is made of a pure metal foil, the first insulating layer 12 is made of one of polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyphenyl ether and polysulfone, and the second pole piece 2 is made of copper metal or copper alloy.
Preferably, the battery cell 4 includes a positive plate, a negative plate and a diaphragm, the positive plate, the diaphragm and the negative plate are sequentially stacked and wound in the same direction to form a wound battery cell, the first electrode leading-out end 41 is respectively connected with the positive plate and the first metal layer 11, and the second electrode leading-out end 42 is respectively connected with the negative plate and the second electrode shell 2.
Preferably, the thickness of the first pole piece shell 1 is 10-100 μm, the thickness of the second pole piece shell 2 is 40-800 μm, the thickness of the first pole piece shell 1 is H, and the thickness of the second pole piece shell 2 is K, which satisfy the relation: K/H is more than or equal to 4 and is less than or equal to 8, thereby the rigidity of first utmost point shell 1 and second utmost point shell 2 has been ensured effectively, the outer wall of second utmost point shell 2 is provided with the viscose layer, first insulating layer 12 is connected with the viscose layer and is formed battery body 3, first utmost point shell 1 part surrounds second utmost point shell 2, wherein, the viscose layer has insulating nature, the hot melt adhesive can be chooseed for use to the material on viscose layer, the viscose layer is acceptd in battery body 3's inside, the seal position on first insulating layer 12 and viscose layer can strut and carry out the pressure release, the phenomenon that the battery took place the explosion has been avoided, thereby the problem of the inside high atmospheric pressure that appears of electricity core 4.
Preferably, the first pole case 1 is formed with a first plane 15 and a first inclined plane 16, the second pole case 2 is formed with a second plane 24 and a second inclined plane 25, the first insulating layer 12 is formed with a first plane 15 and a first inclined plane 16, the second inclined plane 25 is provided with an adhesive layer, the first inclined plane 16 and the second inclined plane 25 are connected to form the battery body 3, and the first plane 15 and the second plane 24 are parallel to each other, and the first inclined plane 16 and the second inclined plane 25 are used for enabling the first pole case 1 and the second pole case 2 to abut against each other during assembly, so that not only is the situation that the surface of the first pole case 1 is wrinkled effectively avoided, but also the situation that a large tolerance occurs between the first pole case 1 and the second pole case 2 is avoided, and therefore the packaging sealing performance of the battery body 3 and the appearance smoothness of the battery body 3 are improved.
Preferably, the included angle between the first plane 15 and the first inclined plane 16 is a, and the included angle between the second plane 24 and the second inclined plane 25 is B, which satisfy the following relations: a is more than or equal to 95 degrees and less than or equal to 110 degrees; b is more than or equal to 70 degrees and less than or equal to 85 degrees; a + B is 180 °, so that the sealing property and the appearance flatness of the battery body 3 are effectively ensured and the rigidity of the first and second pole cases 1 and 2 is ensured.
Example 4
The difference between this embodiment and embodiment 3 is that the adhesive layer disposed on the outer wall of the second electrode shell 2 is changed to a surface insulating layer, the second inclined plane 25 is provided with a surface insulating layer, the material of the surface insulating layer is one of polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyphenylene oxide and polysulfone, the first insulating layer 12 and the surface insulating layer are connected by hot melting to form the battery body 3, the first insulating layer 12 and the surface insulating layer are both accommodated inside the battery body 3, because the first insulating layer 12 and the surface insulating layer are connected by hot melting, when the battery core 4 is subjected to high temperature and overcharge, etc., the internal gas generation of the battery is serious, the sealing positions of the first insulating layer 12 and the surface insulating layer can be spread to release pressure, thereby avoiding the phenomenon of battery explosion, and effectively improving the problem of high gas pressure inside the battery core 4.
The other structures of this embodiment are the same as those of embodiment 3, and are not described again here.
Example 5
The difference between this embodiment and embodiment 1 is that the first electrode case 1 is a negative electrode case, the second electrode case 2 is a positive electrode case, the first electrode leading end 41 is a negative electrode leading end, the second electrode leading end 42 is a positive electrode leading end, the first electrode leading end 41 is respectively connected with the negative electrode sheet and the first metal layer 11, the second electrode leading end 42 is respectively connected with the positive electrode sheet and the second electrode case 2, and other structures of this embodiment are the same as those of embodiment 1, and are not described herein again.
Example 6
The difference between this embodiment and embodiment 1 is that the material of the first metal layer 11 has a conductivity greater than 3.78 × 107The alloy foil comprises an S/m alloy foil, wherein the first insulating layer 12 is made of polypropylene, polystyrene, polyphenyl ether and polysulfone, the content ratio of the polypropylene to the polystyrene to the polyphenyl ether to the polysulfone is 3:1:1:2, the first metal layer 11 is tightly combined with the first insulating layer 12, the first metal layer 11 is made of the same material as the second metal layer 21, the first insulating layer 12 is made of the same material as the second insulating layer 22, the first insulating layer 12 is in hot-melt connection with the second insulating layer 22 to form the battery body 3, and other structures of the embodiment are the same as those of embodiment 1 and are not repeated herein.
Example 7
The difference between this embodiment and embodiment 2 is that the first electrode case 1 is a negative electrode case, the second electrode case 2 is a positive electrode case, the first electrode leading-out terminal 41 is a negative electrode leading-out terminal, the second electrode leading-out terminal 42 is a positive electrode leading-out terminal, the first electrode leading-out terminal 41 is respectively connected with the negative electrode sheet and the first metal layer 11, the second electrode leading-out terminal 42 is respectively connected with the positive electrode sheet and the second electrode case 2, and other structures of this embodiment are the same as those of embodiment 2, and are not described herein again.
Example 8
The difference between this embodiment and embodiment 2 is that the material of the first insulating layer 12 includes polycarbonate, polypropylene, polystyrene, polyphenylene oxide and polysulfone, the content ratio of polycarbonate, polypropylene, polystyrene, polyphenylene oxide and polysulfone is 1:4:1:1:2, the materials of the first insulating layer 12 and the second insulating layer 22 are the same, the first insulating layer 12 and the second insulating layer 22 are connected by thermal fusion to form the battery body 3, and the other structures of this embodiment are the same as those of embodiment 2, and are not described again here.
Example 9
The difference between this embodiment and embodiment 3 is that the first electrode shell 1 is a negative electrode shell, the second electrode shell 2 is a positive electrode shell, the first electrode leading-out terminal 41 is a negative electrode leading-out terminal, the second electrode leading-out terminal 42 is a positive electrode leading-out terminal, the material of the second electrode shell 2 is aluminum metal or aluminum alloy, the first electrode leading-out terminal 41 is respectively connected with the negative electrode sheet and the first metal layer 11, and the second electrode leading-out terminal 42 is respectively connected with the positive electrode sheet and the second electrode shell 2, and the other structures of this embodiment are the same as those of embodiment 3, and are not repeated here.
Example 10
The difference between this embodiment and embodiment 3 is that the material of the first metal layer 11 has a conductivity greater than 3.78 × 107The alloy foil comprises an S/m alloy foil, wherein the first insulating layer 12 is made of polypropylene, polyvinyl chloride, polystyrene and polyphenyl ether, the content ratio of the polypropylene to the polyvinyl chloride to the polystyrene to the polyphenyl ether is 4:1:1:2, the first metal layer 11 is tightly combined with the first insulating layer 12, the first insulating layer 12 is connected with an adhesive layer to form a battery body 3, and other structures of the embodiment are the same as those of embodiment 3 and are not repeated herein.
Obviously, the prior button cell can not solve the technical problems that the internal gas generation of the cell is serious and the gas in the cell can not be discharged in time when the cell meets the conditions of high temperature, overcharge and the like, and the prior button cell can not effectively coordinate the relationship between the cell appearance and the cell energy density, thereby seriously influencing the high-efficiency matching of the button cell and electronic equipment. Moreover, the shell of the battery cannot deform or wrinkle, and the safety performance of the battery is effectively guaranteed.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (10)

1. A button cell is characterized in that: including first polar shell (1) and second polar shell (2), first polar shell (1) with second polar shell (2) are connected and are formed battery body (3), first polar shell (1) includes first metal level (11) and first insulating layer (12), first metal level (11) set up in the outside of battery body (3), first insulating layer (12) accept in the inside of battery body (3), the inside of battery body (3) is provided with electric core (4), first insulating layer (12) are provided with and leave dead zone (13), first electrode of electric core (4) is drawn forth end (41) and is passed leave dead zone (13) with first metal level (11) are connected, second electrode of electric core (4) is drawn forth end (42) with second polar shell (2) are connected.
2. The button cell of claim 1, wherein: the battery cell (4) comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate, the diaphragm and the negative plate are sequentially stacked and wound in the same direction to form a winding battery cell.
3. The button cell of claim 1, wherein: the first polar shell (1) is made of a steel plastic film, and the second polar shell (2) is made of a steel plastic film or metal.
4. A button cell according to claim 1 or 3, wherein: the thickness of the first polar shell (1) is 10-150 mu m, and the thickness of the second polar shell (2) is 10-1500 mu m.
5. The button cell of claim 4, wherein: the material of second polar shell (2) is for steel plastic film, second polar shell (2) include second metal level (21) and second insulating layer (22), first insulating layer (12) with second insulating layer (22) hot melt connects and forms battery body (3).
6. The button cell of claim 5, wherein: the battery comprises a battery body (3), and is characterized in that a first flanging (14) is formed on the first pole shell (1), a second flanging (23) is formed on the second pole shell (2), and the first flanging (14) and the second flanging (23) are connected to form the battery body (3).
7. The button cell of claim 4, wherein: the material of second utmost point shell (2) is the metal, the outer wall of second utmost point shell (2) is provided with the viscose layer, first insulating layer (12) with the viscose layer is connected and is formed battery body (3).
8. The button cell of claim 7, wherein: the thickness of the first polar shell (1) is H, the thickness of the second polar shell (2) is K, and the relation is satisfied: K/H is more than or equal to 2 and less than or equal to 10.
9. The button cell of claim 7, wherein: the battery comprises a battery body (3), and is characterized in that a first plane (15) and a first inclined plane (16) are formed on the first pole shell (1), a second plane (24) and a second inclined plane (25) are formed on the second pole shell (2), and the first inclined plane (16) and the second inclined plane (25) are connected to form the battery body (3).
10. The button cell of claim 9, wherein: the included angle between the first plane (15) and the first inclined plane (16) is A, the included angle between the second plane (24) and the second inclined plane (25) is B, and the included angles respectively satisfy the following relations: 90 degrees < A < 120 degrees; b is more than or equal to 60 and less than 90 degrees.
CN202010454561.4A 2020-05-26 2020-05-26 Button cell Pending CN111554836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010454561.4A CN111554836A (en) 2020-05-26 2020-05-26 Button cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010454561.4A CN111554836A (en) 2020-05-26 2020-05-26 Button cell

Publications (1)

Publication Number Publication Date
CN111554836A true CN111554836A (en) 2020-08-18

Family

ID=72008560

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010454561.4A Pending CN111554836A (en) 2020-05-26 2020-05-26 Button cell

Country Status (1)

Country Link
CN (1) CN111554836A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112467266A (en) * 2020-11-30 2021-03-09 惠州市恒泰科技股份有限公司 Preparation method of steel shell button cell and steel shell button cell
CN112531243A (en) * 2020-12-17 2021-03-19 珠海冠宇电池股份有限公司 Button battery and manufacturing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112467266A (en) * 2020-11-30 2021-03-09 惠州市恒泰科技股份有限公司 Preparation method of steel shell button cell and steel shell button cell
CN112467266B (en) * 2020-11-30 2023-12-19 惠州市恒泰科技股份有限公司 Preparation method of steel shell button cell and steel shell button cell
CN112531243A (en) * 2020-12-17 2021-03-19 珠海冠宇电池股份有限公司 Button battery and manufacturing method

Similar Documents

Publication Publication Date Title
CN100435403C (en) Secondary battery with partition type electrode assembly
US7498099B2 (en) Film covered battery
CN108598296A (en) Improve the secondary cell of energy density
CN215989120U (en) Square battery monomer, battery and consumer
WO2014126338A1 (en) Battery cell having novel structure and enhanced safety
CN111554836A (en) Button cell
CN212676424U (en) Battery and device using battery
CN211789137U (en) Button cell
CN110739487A (en) micro-button battery and preparation method thereof
WO2022267639A1 (en) Electrode assembly, battery, battery module, battery pack, and electric device
CN215988973U (en) Button cell structure
CN212209680U (en) Combined battery core and battery with same
CN212277314U (en) Button cell
CN210956892U (en) Formula soft-packaged electric core is buckled to butterfly bean
CN113328194B (en) Battery, battery module, battery pack and electric vehicle
WO2022170998A1 (en) Battery and electronic device
CN215418509U (en) Lithium ion battery structure
CN216648357U (en) A electric core pole piece structure and battery for improving heat abuse inefficacy
CN213340472U (en) Roll core, battery and electronic product
CN101752613A (en) Power soft packaging lithium ion battery with high power
CN114207931A (en) Battery cell and power utilization device
CN108258333B (en) Low-temperature nickel-hydrogen battery and preparation method thereof
WO2024001318A1 (en) Battery pole piece, pole piece assembly, battery, and electrical device
CN220585332U (en) Battery monomer and battery
WO2024031348A1 (en) Electrode assembly, battery cell, battery, and electric device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination