CN112290131A - Button cell - Google Patents

Button cell Download PDF

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Publication number
CN112290131A
CN112290131A CN202011293197.4A CN202011293197A CN112290131A CN 112290131 A CN112290131 A CN 112290131A CN 202011293197 A CN202011293197 A CN 202011293197A CN 112290131 A CN112290131 A CN 112290131A
Authority
CN
China
Prior art keywords
shell
hole
tab
button cell
cover plate
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
CN202011293197.4A
Other languages
Chinese (zh)
Inventor
凌万秾
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.)
Jiangmen Yuanxi Technology Co ltd
Original Assignee
Jiangmen Yuanxi 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 Jiangmen Yuanxi Technology Co ltd filed Critical Jiangmen Yuanxi Technology Co ltd
Priority to CN202011293197.4A priority Critical patent/CN112290131A/en
Priority to DE212020000812.4U priority patent/DE212020000812U1/en
Priority to PCT/CN2020/135794 priority patent/WO2022104958A1/en
Publication of CN112290131A publication Critical patent/CN112290131A/en
Pending legal-status Critical Current

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    • 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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/1243—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the internal coating on the casing
    • 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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/153—Lids or covers characterised by their shape for button or coin 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/181—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for button or coin 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H01M50/56—Cup shaped terminals
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • H01M50/645—Plugs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention discloses a button cell, which comprises a shell, a pole, a sealing element and a cell, wherein the shell is provided with a through hole; the pole column penetrates through the through hole, the pole column and the shell are connected in a sealing mode through the insulating part, the shell or the pole column is provided with a liquid injection hole, and the liquid injection hole is communicated with the inside of the shell; the sealing element is used for sealing the liquid injection hole; the electric core is arranged in the shell, a first lug and a second lug which are opposite in polarity are arranged at the two ends of the electric core respectively, the first lug is electrically connected with the shell, and the second lug is electrically connected with the pole. The invention has simple structure, small occupied space of the shell structure, large internal space of the shell, effectively improves the energy density of the battery and meets the production requirement.

Description

Button cell
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a button cell battery.
Background
The battery shell of the button battery adopts a cylindrical structure, the battery shell is generally divided into two structures at present, one structure comprises an inner shell, an outer shell and a sealing ring, the outer shell is reversely buckled at the outer side of the inner shell, the sealing ring is connected between the outer shell and the inner shell, the structure occupies more space in the radial direction, the battery cannot fully utilize the inner space of the battery shell, and the problem of low energy density of the battery exists; another kind of structure comprises shell and top cap, and the top cap is connected with the shell, and current top cap is generally connected with utmost point post through the riveting mode, and the structure is complicated, and the structural thickness of this kind of top cap is great, leads to occupying more space in the axial direction, has the lower problem of battery energy density equally.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the button cell provided by the invention has the advantages that the structure is simple, the self structure of the shell occupies small space, the internal space of the shell is large, the energy density of the cell is effectively improved, and the production requirement is met.
A button cell according to an embodiment of the present invention includes: a housing provided with a through hole; the pole column penetrates through the through hole, the pole column is connected with the shell in an adhesion mode through an insulating part, a liquid injection hole is formed in the shell or the pole column, and the liquid injection hole is communicated with the interior of the shell; the sealing element is used for sealing the liquid injection hole; the battery cell is arranged in the shell, a first tab and a second tab with opposite polarities are arranged at two ends of the battery cell respectively, the first tab is electrically connected with the shell, and the second tab is electrically connected with the pole.
The technical scheme at least has the following beneficial effects: only set up single-layer structure's casing on the radial direction, it is little to occupy the space, on the axial direction, utmost point post bonds on the casing through one deck insulating part, for prior art, the wall thickness at casing top is littleer, the space that occupies on the axial direction is littleer, therefore, the space that casing self structure occupied is little, under the prerequisite that the appearance size is the same, the inner space of this technical scheme's battery structure is bigger, effectively improve the energy density of battery, satisfy the production demand, simultaneously, it has the notes liquid hole to integrate, be convenient for pour into electrolyte into.
According to some embodiments of the invention, the pole comprises a first section and a second section, the cross-sectional area of the first section is larger than that of the second section, and the cross-sectional area of the first section is larger than that of the through hole, the first section is adhered to the inner wall of the housing through the insulating member, and the second section is arranged through the through hole.
According to some embodiments of the invention, the inner wall of the housing is provided with a groove for accommodating the first section.
According to some embodiments of the invention, the casing includes a housing and a cover plate, the cover plate is hermetically connected to the housing, the battery cell is installed inside the housing, and the through hole is disposed in the cover plate or the housing.
According to some embodiments of the present invention, one of the housing and the cover plate is provided with a positioning groove, and the other is mounted in the positioning groove.
According to some embodiments of the invention, the end of the outer shell is provided with a flaring structure, the diameter of the flaring structure is matched with the diameter of the cover plate, and the flaring structure is the positioning groove.
According to some embodiments of the invention, a side of the cell facing the first tab is provided with a first insulating layer.
According to some embodiments of the invention, a side of the cell facing the second tab is provided with a second insulating layer.
According to some embodiments of the invention, the end face of the housing contacting the insulating member is subjected to metal passivation or complexation, and the end face of the pole contacting the insulating member is subjected to metal passivation or complexation
According to some embodiments of the invention, the housing is stainless steel.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a cross-sectional view of a button cell in an embodiment of the invention;
FIG. 2 is a cross-sectional view of a post in an embodiment of the invention;
FIG. 3 is a cross-sectional view of a cover plate according to another embodiment of the present invention;
fig. 4 is a cross-sectional view of a button cell in another embodiment of the invention;
FIG. 5 is a cross-sectional view of a housing in another embodiment of the invention;
fig. 6 is a partial cross-sectional view of the housing and cover plate connection in another embodiment of the invention.
Reference numerals:
the shell comprises a shell body 100, a cover plate 110, a first through hole 111, a first groove 112, a stepped groove 113, a shell 120, a second through hole 121, a second groove 122 and a flaring structure 123;
the pole 200, the first section 210, the second section 220, the liquid injection hole 230 and the insulating part 240;
a sealing member 300;
the battery cell comprises a battery cell 400, a first tab 410, a second tab 420, a first insulating layer 430 and a second insulating layer 440.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 and 2, an embodiment of the present invention provides a button cell, including a casing 100, a terminal post 200, a sealing member 300, and a cell 400, where the casing 100 is composed of a casing 120 and a cover plate 110, the cover plate 110 is a circular plate, the cover plate 110 is hermetically connected to the casing 120 by welding, a first through hole 111 is provided in a middle portion of the cover plate 110, the terminal post 200 is inserted into the first through hole 111, specifically, the terminal post 200 is a cylindrical structure, the terminal post 200 includes a first section 210 and a second section 220, a cross-sectional area of the first section 210 is greater than a cross-sectional area of the second section 220, and a cross-sectional area of the first section 210 is greater than a cross-sectional area of the first through hole 111, i.e., a diameter of the first section 210 is greater than a diameter of the second section 220, a diameter of the first section 210 is greater than a diameter of the first through hole 111, the first section 210 is adhered to an inner wall of the cover plate 110 by an insulating, it can be understood that the electrical gap may also be filled with an insulating member 240 to further enhance the insulating effect between the terminal 200 and the cover plate 110, the terminal 200 is adhered to the cover plate 110 in a reversed state, so as to prevent the terminal 200 from separating from the cover plate 110, and enhance the stability and reliability of the structure; the insulating member 240 is made of polypropylene, polyethylene or other hot melt adhesive, and is bonded to the post 200 and the cover plate 110 in a heat sealing manner, so that on one hand, the post 200 is stably connected to the cover plate 110, and the sealing performance is good, thereby preventing the electrolyte from leaking, and on the other hand, the post 200 and the cover plate 110 have good insulation and short circuit prevention, and it can be understood that the insulating member 240 is not limited to the above materials, and only needs to have good adhesion, sealing performance and insulation performance; the battery cell 400 is installed inside the casing 120, a first tab 410 and a second tab 420 with opposite polarities are respectively arranged at two ends of the battery cell 400, specifically, the first tab 410 is a negative polarity, the second tab 420 is a positive polarity, the first tab 410 is welded on the bottom wall of the casing 120, the second tab 420 is welded on the pole 200, so that the first tab 410 is electrically connected with the casing 120, the second tab 420 is electrically connected with the pole 200, and the first tab 410 and the second tab 420 are respectively located at two ends of the casing 100 to avoid short circuit; the middle part of utmost point post 200 is provided with the notes liquid hole 230 that is used for annotating the electrolyte into electric core 400, annotates the inside of liquid hole 230 intercommunication casing 100, annotates the built-in sealing member 300 that is equipped with of liquid hole 230, and is concrete, and sealing member 300 is the steel ball, and the steel ball is interference fit with annotating liquid hole 230, and after pouring into electrolyte, the accessible steel ball seals annotates liquid hole 230, prevents that electrolyte from revealing, because annotate liquid hole 230 and set up in the intermediate position at battery top, the positioning assembly steel ball of being convenient for improves production efficiency. It is understood that the liquid injection hole 230 may be disposed on the bottom wall of the cover plate 110 or the housing 120, and only the electrolyte may be injected into the battery.
Compared with the prior art, the battery of the technical scheme only has the shell 120 with a single-layer structure in the radial direction, and occupies small space; in the axial direction, utmost point post 200 bonds on apron 110 through one deck insulating part 240, and the whole thickness of apron 110 is little, and the space that occupies on the axial direction is little, and consequently, the space that casing 100 self structure occupied is little, and under the prerequisite that the appearance size is the same, this technical scheme battery structure's usable inner space is bigger, effectively improves the energy density of battery, satisfies the production demand.
Further, the end face of the cover plate 110 contacting the insulating member 240 is subjected to metal passivation or complexation, and the end face of the pole 200 contacting the insulating member 240 is also subjected to metal passivation or complexation, so that good sealing performance between the cover plate 110 and the insulating member 240 and between the pole 200 and the insulating member 240 is ensured, and electrolyte leakage is avoided.
Further, the housing 120 and the cover plate 110 are preferably made of stainless steel, the housing 120 made of stainless steel can be formed by stamping, so that the processing is convenient, and the thickness can be 0.1mm to 0.2 mm. The aluminum shell needs to be 0.3mm, so that the strength of the shell 100 can be ensured, and the thickness of the stainless steel cover plate 110 can also be 0.1 mm-0.2 mm, so that the space occupied by the structure of the shell 100 can be further reduced, the internal space of the shell 100 is increased, and the energy density of the battery is effectively improved.
Referring to fig. 1, further, the tip of shell 120 is provided with the constant head tank, and the constant head tank is flaring structure 123, and the tip of shell 120 expands toward the outside promptly, makes the internal diameter of flaring structure 123 be greater than the internal diameter of shell 120, and flaring structure 123 passes through ARC structure with the inner wall of shell 120 and is connected, and the internal diameter of flaring structure 123 matches with the diameter of apron 110, and when installing apron 110, be convenient for pinpoint apron 110, convenient welding guarantees welding quality.
In other embodiments, referring to fig. 6, it can be understood that the circumferential edge of the cover plate 110 is provided with a stepped groove 113, the stepped groove 113 is annular, the inner diameter of the stepped groove 113 is matched with the inner diameter of the outer shell 120, the stepped groove 113 can accommodate the end edge of the outer shell 120, the stepped groove 113 is a positioning groove, and when the cover plate 110 is installed, the cover plate 110 can be accurately positioned, welding is facilitated, and welding quality is guaranteed.
Referring to fig. 1, further, the battery cell 400 is of a winding or stacking structure, the winding structure is adopted in the present technical solution, a first insulating layer 430 is disposed on one side of the battery cell 400 facing the first tab 410, and a second insulating layer 440 is disposed on one side of the battery cell 400 facing the second tab 420, because the positive plate and the negative plate of the battery cell 400 in the present technical solution extend from the upper end to the lower end of the battery cell 400, the first insulating layer 430 is disposed to avoid the problem of short circuit caused by the contact between the housing 120 and the negative plate, and the second insulating layer 440 is disposed to avoid the problem of short circuit caused by the contact between the tab 200 and the positive plate, so as to improve the safety performance of the battery, and the first insulating layer 430 and the second insulating layer 440 are insulating media such as polypropylene, polyethylene, polyester resin, and the like.
In other embodiments, referring to fig. 3, it can be understood that the inner wall of the cover plate 110 is provided with the first groove 112 for accommodating the first section 210 of the pole 200, so that the end surface of the first section 210 is flush with the inner wall of the cover plate 110, thereby further reducing the space occupied by the cover plate 110, increasing the internal space of the housing 100 and improving the energy density of the battery.
In other embodiments, referring to fig. 4 and 5, it can be understood that the difference from the previous embodiment is that the bottom wall of the housing 120 is provided with a second through hole 121 at the middle part, the pole 200 is arranged through the second through hole 121, namely, the first section 210 is adhered to the inner side of the bottom wall of the casing 120 through the insulating member 240, the second section 220 is inserted into the second through hole 121, the terminal 200 is adhered to the bottom wall of the casing 120 in a reversed-buckled state, the cover plate 110 is further connected to the top of the casing 120, that is, the installation position of the terminal 200 on the casing 100 is changed, the first tab 410 of the battery cell 400 is welded to the cover plate 110, the second tab 420 is welded to the terminal 200, so that the first tab 410 is electrically connected to the casing 120, and the second tab 420 is electrically connected to the terminal 200, the technical scheme also ensures that the self structure of the shell 100 occupies small space and the internal space of the shell 100 is large, thereby effectively improving the energy density of the battery and meeting the production requirement; it can be understood that the inner side of the bottom wall of the housing 120 is provided with the second groove 122 for accommodating the first section 210 of the pole post 200, so that the end surface of the first section 210 is flush with the inner side of the bottom wall of the housing 120, thereby further reducing the space occupied by the bottom wall of the housing 120, increasing the internal space of the housing 100 and improving the energy density of the battery.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A button cell battery, comprising:
a housing provided with a through hole;
the pole column penetrates through the through hole, the pole column is connected with the shell in an adhesion mode through an insulating part, a liquid injection hole is formed in the shell or the pole column, and the liquid injection hole is communicated with the interior of the shell;
the sealing element is used for sealing the liquid injection hole;
the battery cell is arranged in the shell, a first tab and a second tab with opposite polarities are arranged at two ends of the battery cell respectively, the first tab is electrically connected with the shell, and the second tab is electrically connected with the pole.
2. A button cell according to claim 1, characterized in that: the pole comprises a first section and a second section, the cross-sectional area of the first section is larger than that of the through hole, the first section is adhered to the inner wall of the shell through the insulating piece, and the second section penetrates through the through hole.
3. A button cell according to claim 2, characterized in that: the inner wall of the housing is provided with a groove for accommodating the first section.
4. A button cell according to claim 1, characterized in that: the shell comprises a shell and a cover plate, the cover plate is connected with the shell in a sealing mode, the battery cell is arranged in the shell, and the through hole is formed in the cover plate or the shell.
5. The button cell according to claim 4, wherein: one of the shell and the cover plate is provided with a positioning groove, and the other is arranged in the positioning groove.
6. The button cell according to claim 5, wherein: the end part of the shell is provided with a flaring structure, the diameter of the flaring structure is matched with that of the cover plate, and the flaring structure is the positioning groove.
7. A button cell according to claim 1, characterized in that: one side of the battery cell, which faces the first tab, is provided with a first insulating layer.
8. A button cell according to claim 1, characterized in that: and a second insulating layer is arranged on one side of the battery cell, which faces the second tab.
9. A button cell according to claim 1, characterized in that: the end face of the shell, which is in contact with the insulating part, is subjected to metal passivation or complexing treatment, and the end face of the pole, which is in contact with the insulating part, is subjected to metal passivation or complexing treatment.
10. A button cell according to claim 1, characterized in that: the shell is made of stainless steel.
CN202011293197.4A 2020-11-18 2020-11-18 Button cell Pending CN112290131A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202011293197.4A CN112290131A (en) 2020-11-18 2020-11-18 Button cell
DE212020000812.4U DE212020000812U1 (en) 2020-11-18 2020-12-11 button battery
PCT/CN2020/135794 WO2022104958A1 (en) 2020-11-18 2020-12-11 Button cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011293197.4A CN112290131A (en) 2020-11-18 2020-11-18 Button cell

Publications (1)

Publication Number Publication Date
CN112290131A true CN112290131A (en) 2021-01-29

Family

ID=74399069

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011293197.4A Pending CN112290131A (en) 2020-11-18 2020-11-18 Button cell

Country Status (3)

Country Link
CN (1) CN112290131A (en)
DE (1) DE212020000812U1 (en)
WO (1) WO2022104958A1 (en)

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CN112886048A (en) * 2021-02-07 2021-06-01 惠州市德能电池有限公司 Button cell and preparation method thereof
CN112886156A (en) * 2021-03-15 2021-06-01 贵州中瑞丰泰新能源科技有限公司 Battery structure for injecting liquid from end part of pole and battery liquid injection method
CN113097663A (en) * 2021-04-30 2021-07-09 深圳市科达利实业股份有限公司 Casing external member and power battery
CN113131049A (en) * 2021-04-30 2021-07-16 国研新能(深圳)技术有限公司 Battery case and battery
CN113725532A (en) * 2021-08-25 2021-11-30 远景动力技术(江苏)有限公司 Battery cover plate, battery and battery processing method
CN114024069A (en) * 2021-11-10 2022-02-08 广东维都利新能源有限公司 Button battery with good sealing performance and packaging method
CN114284610A (en) * 2021-12-24 2022-04-05 中创新航科技股份有限公司 Battery cover plate assembly, battery and battery pack
CN114421064A (en) * 2021-12-31 2022-04-29 天津市捷威动力工业有限公司 Battery and battery assembling method
CN114583415A (en) * 2022-04-15 2022-06-03 宁德新能源科技有限公司 Battery and electronic device
WO2022206950A1 (en) * 2021-04-02 2022-10-06 广东微电新能源有限公司 Battery cover plate and battery
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