CN117039352A - Battery cell - Google Patents

Battery cell Download PDF

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Publication number
CN117039352A
CN117039352A CN202311131693.3A CN202311131693A CN117039352A CN 117039352 A CN117039352 A CN 117039352A CN 202311131693 A CN202311131693 A CN 202311131693A CN 117039352 A CN117039352 A CN 117039352A
Authority
CN
China
Prior art keywords
boss
positive
negative
lug
battery
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
CN202311131693.3A
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Chinese (zh)
Inventor
谢主伟
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.)
Vivo Mobile Communication Co Ltd
Original Assignee
Vivo Mobile Communication 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 Vivo Mobile Communication Co Ltd filed Critical Vivo Mobile Communication Co Ltd
Priority to CN202311131693.3A priority Critical patent/CN117039352A/en
Publication of CN117039352A publication Critical patent/CN117039352A/en
Pending legal-status Critical Current

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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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H01M10/0427—Button cells
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/109—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure of button or coin shape
    • 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)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The application discloses a battery, which comprises: a housing having a chamber; the battery cell is arranged in the cavity and is formed by winding a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, the positive plate is connected with a positive lug, and the negative plate is connected with a negative lug; the inside wall of cavity is equipped with the boss, and at least one of anodal ear and negative pole ear is connected with the boss electricity. The lug boss is arranged on the inner side wall of the cavity, at least one of the positive lug and the negative lug is electrically connected with the lug boss, so that the connection position between the lug boss and the lug boss is good in consistency with the internal resistance, and earphone bottom noise is avoided when overcurrent is generated in the process of discharging the battery cell. The resistance between the lug and the boss is small, the low-temperature service time is long, the charging temperature rise and polarization are small, the charging efficiency is higher, the charging quantity is more, and the whole machine time length is longer.

Description

Battery cell
Technical Field
The application belongs to the technical field of batteries, and particularly relates to a battery.
Background
Along with the continuous development of the modern society, the lithium ion battery is increasingly and widely applied to mobile equipment such as mobile phones, notebook computers, tablet computers, digital cameras and the like due to the advantages of high energy density, small environmental pollution and the like. The lithium ion battery of the mobile equipment such as the wearable equipment, the mobile phone, the notebook battery, the digital camera and the like is in a square soft package lithium ion battery and a button lithium ion battery. At present, a lithium ion button cell is used by a true wireless Bluetooth headset (True Wireless Stereo, TWS), the button cell is subjected to blind welding by adopting a lug and a shell, the lug is in contact with the surface of the shell, the connecting contact surface of the lug and the surface of the shell is uneven and consistent, the internal resistance deviation is large, and in the discharging process of the button cell, the lug and the shell surface are in contact, so that the noise of the headset is caused during overcurrent, and the use of a user is influenced.
Disclosure of Invention
The embodiment of the application aims to provide a battery which is used for solving the problem that the bottom noise of an earphone is caused when the electrode lugs are in contact with the surface of a shell in the discharging process of a button cell.
In a first aspect, an embodiment of the present application provides a battery, including:
a housing having a chamber;
the battery cell is arranged in the cavity, and is formed by winding a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, wherein the positive plate is connected with a positive lug, and the negative plate is connected with a negative lug;
the inner side wall of the cavity is provided with a boss, and at least one of the positive electrode lug and the negative electrode lug is electrically connected with the boss.
Optionally, the boss includes first boss and the second boss that the interval set up, the electric core set up in first boss with between the second boss, anodal ear with first boss electricity is connected, the negative pole ear with second boss electricity is connected.
Optionally, the surface of the first boss is provided with a first plane, and the positive electrode lug is electrically connected with the first plane; and/or
The surface of the second boss is provided with a second plane, and the negative electrode lug is electrically connected with the second plane.
Optionally, one end of the positive electrode lug is electrically connected with a positive current collector of the positive electrode sheet, and the other end of the positive electrode lug is parallel to and electrically connected with the first plane; and/or
One end of the negative electrode lug is electrically connected with the negative current collector of the negative electrode plate, and the other end of the negative electrode lug is parallel to and electrically connected with the second plane; and/or
The region where the positive electrode lug is connected to the first plane and the region where the negative electrode lug is connected to the second plane are arranged in parallel.
Optionally, the chamber has a first inner sidewall and a second inner sidewall disposed at opposite intervals, the first boss is disposed on the first inner sidewall, and the second boss is disposed on the second inner sidewall.
Optionally, the first inner sidewall is disposed parallel to the second inner sidewall.
Optionally, the housing includes a first housing and a second housing, the first housing has a first chamber with a first opening, the second housing has a second chamber with a second opening, the first boss is disposed on a bottom wall of the first chamber, and the second boss is disposed on a bottom wall of the second chamber;
one end of the first shell with a first opening stretches into the second cavity, and the first cavity is communicated with the second cavity to form the cavity.
Optionally, the first shell and the second shell are conductive material pieces, and insulation is provided between the first shell and the second shell; and/or
An insulating sealing structure is arranged between the outer side wall of the first shell and the inner side wall of the second cavity.
Optionally, the height of the first boss is 0.1-2mm; and/or
The height of the second boss is 0.1-2mm; and/or
The first boss is columnar, and the diameter of the first boss is 2-5mm; and/or
The second boss is columnar, and the diameter of the second boss is 2-5mm; and/or
The number of the positive lugs is a plurality of, and the number of the first bosses is one; and/or
The number of the negative electrode lugs is multiple, and the number of the second bosses is one.
Optionally, the edge of the positive current collector of the positive plate extends to the outside of the battery cell to form the positive tab; and/or
The edge of the negative current collector of the negative plate extends to the outside of the battery cell to form the negative electrode lug.
Optionally, the positive current collector of the positive plate is the same as the positive tab; and/or
The negative current collector of the negative plate is the same as the negative electrode lug.
In a second aspect, an embodiment of the present application provides an electronic device, including:
the battery described in the above embodiment.
In the battery provided by the embodiment of the application, the battery core is arranged in the cavity, the battery core is formed by winding a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, the positive plate is connected with a positive lug, the negative plate is connected with a negative lug, a boss is arranged on the inner side wall of the cavity, and at least one of the positive lug and the negative lug is electrically connected with the boss. In the battery provided by the embodiment of the application, the boss is arranged on the inner side wall of the cavity, at least one of the positive lug and the negative lug is electrically connected with the boss, so that the connection position and the contact area between the lug and the boss are fixed, the internal resistance deviation is small, the blind welding between the lug and the surface of the shell is avoided, the lug and the shell are prevented from being directly in surface contact, the contact area can be fixed by connecting the lug and the boss, the internal resistance consistency is better than that in the case of surface contact over-current, the internal resistance deviation is small, and the problem of bottom noise caused by large internal resistance fluctuation due to surface contact in the discharging process of the battery core is avoided. The resistance of being connected between utmost point ear and the boss is little, and low temperature live time is long, and the temperature rise that charges is little and polarization is little, and charging efficiency is higher, and it is more to charge into the electric quantity, and the complete machine is long.
Drawings
FIG. 1 is a schematic diagram of a conventional positive plate;
FIG. 2 is a schematic structural view of a diaphragm;
FIG. 3 is a schematic view of a structure of a conventional negative electrode sheet;
FIG. 4 illustrates a conventional tab arrangement in a battery;
fig. 5 is a schematic view illustrating a structure of a battery according to an embodiment of the present application;
FIG. 6 is a schematic view illustrating the arrangement of a positive tab on a positive plate according to an embodiment of the present application;
FIG. 7 is a schematic view of a membrane structure according to an embodiment of the application;
fig. 8 is a schematic view illustrating an arrangement of a negative electrode tab on a negative electrode sheet according to an embodiment of the application;
FIG. 9 is a schematic view illustrating the arrangement of the first boss on the first housing according to an embodiment of the present application;
FIG. 10 is a schematic view illustrating the arrangement of the second boss on the second housing according to an embodiment of the present application;
FIG. 11 is a schematic view of forming a positive tab on a positive plate according to an embodiment of the application;
FIG. 12 is a schematic view of an assembled battery according to an embodiment of the application;
fig. 13 is a schematic view of a battery according to another embodiment of the present application.
Reference numerals
A housing 10; a first housing 11; a second housing 12;
a chamber 13; a sealing structure 14; a support structure 15;
a first chamber 131; a second chamber 132;
a first inner sidewall 101; a second inner sidewall 102;
a positive electrode sheet 20; a positive electrode tab 21;
a negative electrode sheet 30; negative electrode tab 31;
a diaphragm 40;
a first boss 51; and a second boss 52.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application may be practiced otherwise than as specifically illustrated or described herein. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The battery and the electronic device provided by the embodiment of the application are described in detail below with reference to fig. 1 to 13 through specific embodiments and application scenarios thereof.
The battery of the embodiment of the application comprises: the battery cell is arranged in the cavity 13, and can be formed by winding a positive plate 20, a negative plate 30 and a diaphragm 40 arranged between the positive plate 20 and the negative plate 30, wherein the positive plate 20 is connected with a positive lug 21, and the negative plate 30 is connected with a negative lug 31. The battery may be a button battery or a lithium ion battery.
Wherein, the inside wall of the chamber 13 may be provided with a boss, and the positive electrode lug 21 and the negative electrode lug 31 are arranged at intervals, at least one of the positive electrode lug 21 and the negative electrode lug 31 is electrically connected with the boss, and the positive electrode lug 21 and the negative electrode lug 31 are not connected on the same boss. For example, the positive tab 21 or the negative tab 31 is electrically connected to the boss, or the positive tab 21 and the negative tab 31 are electrically connected to different bosses, respectively. The number of the bosses can be one or more, and the plurality of bosses can be arranged at intervals in an insulating way. The boss may be cylindrical, elliptic cylindrical, frustum-shaped or polygonal, and an end face of the boss, which is far away from the inner side wall of the chamber 13, may be a plane, and the positive electrode tab 21 or the negative electrode tab 31 may be attached to an end face of the boss, which is far away from the inner side wall of the chamber 13. The lug and the boss can be connected through conductive adhesive, ultrasonic welding, resistance welding or laser welding.
The number of the positive electrode tabs 21 may be one or more, and in the case that the number of the positive electrode tabs 21 is one, the positive electrode tabs 21 may be electrically connected with one boss; in the case where the number of the positive electrode tabs 21 is plural, the plural positive electrode tabs 21 may be electrically connected to the same boss, or each positive electrode tab 21 may be electrically connected to a corresponding one of the bosses to which one of the positive electrode tabs 21 is connected. The number of the negative electrode tabs 31 may be one or more, and in the case where the number of the negative electrode tabs 31 is one, the negative electrode tabs 31 may be electrically connected with one boss; in the case where the number of negative electrode tabs 31 is plural, the plural negative electrode tabs 31 may be electrically connected to the same boss, or each negative electrode tab 31 may be electrically connected to a corresponding one of the bosses to which one negative electrode tab 31 is connected.
In fig. 1 to 4, as shown in fig. 1, the lower half part of the positive electrode tab 2 on the positive electrode tab 1 and the positive current collector in the positive electrode tab 1 are stacked in the thickness direction, as shown in fig. 3, the lower half part of the negative electrode tab 4 on the negative electrode tab 3 and the negative current collector in the negative electrode tab 3 are stacked in the thickness direction, as shown in fig. 4, the positive electrode tab 1, the negative electrode tab 3 and the separator 5 arranged between the positive electrode tab 1 and the negative electrode tab 3 are wound to form a battery cell, the positive electrode tab 2 and the negative electrode tab 4 are arranged in a battery shell, the positive electrode tab 2 and the negative electrode tab 4 are subjected to blind welding with the inner side wall surface of the shell, the contact area of the electrode tab and the inner side wall of the shell is uncontrollable, the connection contact area of the electrode tab and the inner side wall of the shell is uneven, the internal resistance deviation is large, and during the discharging process of the battery cell, the earphone noise is caused by the contact of the electrode tab and the inner side wall surface of the shell during overcurrent. As shown in fig. 5, in the application, the inner side wall of the chamber 13 is provided with a boss, at least one of the positive lug 21 and the negative lug 31 is electrically connected with the boss, blind welding can be avoided when the surface of the lug is welded and connected with the boss, the lug is prevented from directly making surface contact with the shell, the connection contact surface of the lug and the shell surface is uniform and consistent, the internal resistance deviation is small, and earphone noise caused by overcurrent in the process of discharging the battery cell is avoided.
In the battery provided by the embodiment of the application, the boss is arranged on the inner side wall of the cavity, at least one of the positive lug and the negative lug is electrically connected with the boss, so that the connection position and the contact area between the lug and the boss are fixed, the internal resistance deviation is small, the blind welding between the lug and the surface of the shell is avoided, the lug and the shell are prevented from being directly in surface contact, the contact area can be fixed by connecting the lug and the boss, the internal resistance consistency is better than that in the case of surface contact over-current, the internal resistance deviation is small, and the problem of bottom noise caused by large internal resistance fluctuation due to surface contact in the discharging process of the battery core is avoided. The resistance of being connected between utmost point ear and the boss is little, and low temperature live time is long, and the temperature rise that charges is little and polarization is little, and charging efficiency is higher, and it is more to charge into the electric quantity, and the complete machine is long.
In some embodiments, as shown in fig. 5 and 13, the boss may include a first boss 51 and a second boss 52 disposed at intervals, and the cell may be disposed between the first boss 51 and the second boss 52, the positive tab 21 is electrically connected with the first boss 51, and the negative tab 31 is electrically connected with the second boss 52. The first boss 51 and the second boss 52 may be disposed at an insulation interval therebetween, so that the negative electrode tab 31 and the positive electrode tab 21 may be disposed at an insulation interval therebetween. The battery cell is arranged between the first boss 51 and the second boss 52, so that the positive electrode lug 21 and the negative electrode lug 31 which are connected on the battery cell are connected with the corresponding bosses, and the positive electrode lug 21 and the negative electrode lug 31 can be separated.
The first boss 51 may be cylindrical, elliptic cylindrical, frustum-shaped or polygonal, and an end surface of the inner sidewall of the first boss 51 far away from the chamber 13 may be a plane, and the positive electrode tab 21 may be attached to an end surface of the inner sidewall of the first boss 51 far away from the chamber 13. The second boss 52 may be cylindrical, elliptic cylindrical, frustum-shaped or polygonal, and an end surface of the second boss 52 away from the inner sidewall of the chamber 13 may be a plane, and the negative electrode tab 31 may be attached to an end surface of the second boss 52 away from the inner sidewall of the chamber 13.
The number of the positive electrode tabs 21 may be one or more, and in the case that the number of the positive electrode tabs 21 is one, the positive electrode tabs 21 may be electrically connected with one first boss 51; in the case where the number of the positive electrode tabs 21 is plural, the plural positive electrode tabs 21 may be electrically connected to the same first boss 51, or each positive electrode tab 21 may be electrically connected to a corresponding one of the first bosses 51, with one of the positive electrode tabs 21 being connected to the first boss 51. The number of the negative electrode tabs 31 may be one or more, and in the case where the number of the negative electrode tabs 31 is one, the negative electrode tabs 31 may be electrically connected with one second boss 52; in the case where the number of negative electrode tabs 31 is plural, the plural negative electrode tabs 31 may be electrically connected to the same second boss 52, or each negative electrode tab 31 may be electrically connected to a corresponding one of the second bosses 52, and one negative electrode tab 31 is connected to one of the second bosses 52.
In other embodiments, the surface of the first boss 51 may have a first plane, and the positive tab 21 is electrically connected to the first plane. The positive lug 21 can be flaky, and the positive lug 21 can be attached to the first plane, so that the consistency of the contact area between the positive lug and the surface of the first boss is good, the consistency of the internal resistance of the connection area is good, and the internal resistance deviation of the connection area is reduced.
Optionally, the surface of the second boss 52 has a second plane, and the negative electrode tab 31 is electrically connected to the second plane. The negative electrode lug 31 can be flaky, and the negative electrode lug 31 can be attached to the first plane, so that the consistency of the contact area between the negative electrode lug and the surface of the second boss is good, the consistency of the internal resistance of the connection area is good, and the internal resistance deviation of the connection area is reduced.
In some embodiments, one end of the positive tab 21 is electrically connected to the positive current collector of the positive tab 20, and the other end of the positive tab 21 is parallel to and electrically connected to the first plane. As shown in fig. 5, 6 and 13, one end edge of the positive tab 21 is electrically connected to an edge of a positive current collector of the positive electrode tab 20, which may be aluminum foil, and the other end of the positive tab 21 is parallel to and electrically connected to the first plane. The edge of one end of the positive electrode lug 21 is electrically connected with the edge of the positive current collector, so that the diameter of the winding core can be prevented from being increased due to the positive electrode lug, and the energy density of the battery core can be improved. The other end of the positive tab 21 is parallel to the first plane, so that the positive tab can be attached to the first plane, the consistency of the contact area between the positive tab and the surface of the first boss is good, the consistency of the internal resistance of the connection area is good, and the internal resistance deviation of the connection area can be reduced.
One end of negative electrode tab 31 is electrically connected to the negative current collector of negative electrode tab 30, and the other end of negative electrode tab 31 is electrically connected in parallel to the second plane. As shown in fig. 5, 8 and 13, one end edge of the negative tab 31 is electrically connected to an edge of a negative current collector of the negative plate 30, which may be copper foil, and the other end of the negative tab 31 is parallel to and electrically connected to the second plane. The edge of one end of the negative electrode lug 31 is electrically connected with the edge of the negative current collector, so that the diameter of the winding core is prevented from being increased due to the negative electrode lug, and the energy density of the battery core is improved. The other end of the negative electrode lug 31 is parallel to the second plane, so that the negative electrode lug can be attached to the second plane, the consistency of the contact area between the negative electrode lug and the surface of the second boss is good, the consistency of the internal resistance of the connection area is good, and the internal resistance deviation of the connection area can be reduced.
Alternatively, the region where the positive electrode tab 21 is connected to the first plane and the region where the negative electrode tab 31 is connected to the second plane may be disposed in parallel, and the first plane and the second plane may be disposed in parallel. The region of positive electrode ear 21 connection on the first plane and the region of negative electrode ear 31 connection on the second plane can be in the form of flat slice, and the region of positive electrode ear 21 connection on the first plane can be hugged closely on the first plane, and the region of negative electrode ear 31 connection on the second plane can be hugged closely on the second plane for the contact area uniformity of tab and boss surface is good, and the internal resistance uniformity of connection region is good, reduces the internal resistance deviation of connection region.
In some embodiments, as shown in fig. 5 and 13, the chamber 13 has a first inner sidewall 101 and a second inner sidewall 102 disposed at opposite intervals, the first boss 51 may be disposed on the first inner sidewall 101, the second boss 52 may be disposed on the second inner sidewall 102, such that the first boss 51 is disposed at an interval from the second boss 52, and the battery cell may be disposed between the first boss 51 and the second boss 52. The positive tab 21 may be disposed on a side of the battery cell near the first boss 51, and the negative tab 31 may be disposed on a side of the battery cell near the second boss 52, so as to facilitate connection between the tab and the boss, and meanwhile, enable the positive tab 21 and the negative tab 31 to be spaced apart, so as to prevent short circuit.
In some embodiments, a first elastic layer may be disposed between the positive tab 21 and the first inner sidewall 101, and a second elastic layer may be disposed between the negative tab 31 and the second inner sidewall 102, and the first and second elastic layers may have pores and may have a buffer effect. A first filling layer may be disposed on a side of the positive electrode tab 21 far from the first boss 51, a second filling layer may be disposed on a side of the negative electrode tab 31 far from the second boss 52, the first filling layer and the second filling layer may be elastic layers, and the first filling layer and the second filling layer may have pores and may have a buffer effect.
The housing 10 may have a cylindrical or elliptical cylindrical shape, the chamber 13 may have a cylindrical or elliptical cylindrical shape, the first inner sidewall 101 may be disposed at an upper end of the housing 10, and the second inner sidewall 102 may be disposed at a lower end of the housing 10. The number of the first bosses 51 may be one or more, and the plurality of first bosses 51 may be disposed at intervals on the first inner sidewall 101; the number of the second bosses 52 may be one or more, and the plurality of second bosses 52 may be disposed at intervals on the second inner sidewall 102. The shape, number, height and material of the first boss 51 and the second boss 52 may be the same or different, and may be specifically selected according to actual needs.
In some embodiments, the battery cell is disposed between the first boss 51 and the second boss 52, the positive tab 21 is disposed adjacent to the first boss 51, and the negative tab 31 is disposed adjacent to the second boss 52. For example, the first boss 51 and the positive tab 21 may be disposed on one side of the battery cell, the second boss 52 and the negative tab 31 may be disposed on the other side of the battery cell, so that the length of the tab may be reduced, and the positive tab 21 and the negative tab 31 may be separated from each other, thereby preventing contact short circuit. Alternatively, the first inner sidewall 101 and the second inner sidewall 102 may be disposed in parallel, so as to facilitate the mating between the battery cell and the housing.
In the embodiment of the present application, as shown in fig. 5, 9, 10, 12 and 13, the case 10 may include a first case 11 and a second case 12, the first case 11 has a first chamber 131 with a first opening, the second case 12 has a second chamber 132 with a second opening, the first boss 51 is disposed at a bottom wall of the first chamber 131, and the second boss 52 is disposed at a bottom wall of the second chamber 132, so that the positive tab 21 and the negative tab 31 may be spaced apart to prevent a short circuit.
One end of the first housing 11 having the first opening protrudes into the second chamber 132, and the first chamber 131 communicates with the second chamber 132 to constitute the chamber 13. The outer sidewall of the first housing 11 and the inner sidewall of the second chamber 132 may be spaced apart, and the rim of the first opening of the first housing 11 and the bottom wall of the second housing 12 may be spaced apart, so that the first housing 11 and the second housing 12 may be insulated.
Alternatively, the first housing 11 and the second housing 12 may be conductive material pieces, with insulation between the first housing 11 and the second housing 12. The first housing 11 and the second housing 12 may be metal materials, for example, the first housing 11 and the second housing 12 may be copper, stainless steel, aluminum, etc. The first boss 51 is electrically connected to the first case 11, the second boss 52 is electrically connected to the second case 12, the first case 11 and the second case 12 are insulated from each other, the first case 11 and the second case 12 are conductors, and the battery cell can transmit power to the outside through the first case 11 and the second case 12.
In some embodiments, as shown in fig. 13, an insulating sealing structure 14 may be provided between the outer sidewall of the first housing 11 and the inner sidewall of the second chamber 132. The sealing structure 14 may be made of plastic, rubber, or the like, and the sealing structure 14 may be made of an elastic material to buffer stress between the outer sidewall of the first housing 11 and the inner sidewall of the second chamber 132. The sealing structure 14 may be a sealant, and the first housing 11 and the second housing 12 may be firmly connected through the sealing structure 14.
In the preparation process, as shown in fig. 12, the positive electrode sheet 20, the negative electrode sheet 30 and the separator 40 may be prepared, the positive electrode sheet 20, the negative electrode sheet 30 and the separator 40 disposed between the positive electrode sheet 20 and the negative electrode sheet 30 are wound to form a battery core, the battery core is disposed in the second chamber 132 of the second housing 12, then one end of the first housing 11 having the first opening extends into the second chamber 132, so that the first chamber 131 is communicated with the second chamber 132 to form the chamber 13, the first housing 11 is insulated from the second housing 12, and an insulating sealing structure 14 may be disposed between the outer sidewall of the first housing 11 and the inner sidewall of the second chamber 132.
As shown in fig. 13, the first housing 11 has a first open end and a bottom wall of the second chamber 132 are spaced apart from each other, and an insulating support structure 15 may be disposed between the first open end of the first housing 11 and the bottom wall of the second chamber 132, where the support structure 15 may be an elastic material member to buffer the force between the first housing 11 and the second housing 12. The support structure 15 may be a sealant, which has a sealing effect. The sealing structure 14 and the supporting structure 15 can be connected, the sealing structure 14 and the supporting structure 15 can be integrally formed, the sealing structure 14 and the supporting structure 15 can be elastic sealant, and the sealing structure can have sealing effect, buffering effect and insulating effect.
In some embodiments, the height of the first boss 51 may be 0.1-2mm. For example, the height of the first boss 51 may be 0.1mm, 1mm, or 2mm. The height of the first boss 51 is too high to affect the capacity of the battery, the height of the first boss 51 is too low to affect the welding effect, and the specific height of the first boss 51 can be reasonably selected according to actual needs.
Alternatively, the height of the second boss 52 is 0.1-2mm. For example, the height of the second boss 52 may be 0.1mm, 1mm, or 2mm. The height of the second boss 52 is too high to affect the capacity of the battery, the height of the second boss 52 is too low to affect the welding effect, and the specific height of the second boss 52 can be reasonably selected according to actual needs.
Alternatively, the first boss 51 may have a cylindrical shape, and the diameter of the first boss 51 may be 2-5mm. For example, the diameter of the first boss 51 may be 2mm or 5mm, and the diameter of the first boss 51 may be reasonably selected according to actual needs.
Alternatively, the second boss 52 may be cylindrical, and the diameter of the second boss 52 may be 2-5mm. For example, the diameter of the second boss 52 may be 2mm or 5mm, and the diameter of the second boss 52 may be reasonably selected according to actual needs.
Alternatively, the number of the positive tabs 21 is plural, and the number of the first bosses 51 is one. For example, the number of the positive electrode tabs 21 may be two, the number of the first bosses 51 is one, the two positive electrode tabs 21 may be electrically connected with the first bosses 51, the two positive electrode tabs 21 may be both directly electrically connected with the first bosses 51, or the first positive electrode tab 21 may be directly electrically connected with the first bosses 51, the second positive electrode tab 21 may be electrically connected with the first bosses 51 through the first positive electrode tab 21, which may be beneficial to reducing the length and the volume of the second positive electrode tab 21 and reducing the space occupation of the second positive electrode tab 21.
Alternatively, the number of negative electrode tabs 31 is plural, and the number of second bosses 52 is one. For example, the number of the negative electrode lugs 31 may be two, the number of the second bosses 52 is one, the two negative electrode lugs 31 may be electrically connected with the second bosses 52, the two negative electrode lugs 31 may be both directly electrically connected with the second bosses 52, or the first negative electrode lug 31 may be directly electrically connected with the second bosses 52, the second negative electrode lug 31 may be electrically connected with the second bosses 52 through the first negative electrode lug 31, which may be beneficial to reducing the length and the volume of the second negative electrode lug 31 and reducing the space occupation of the second negative electrode lug 31.
In some embodiments of the present application, the edge of the positive current collector of the positive electrode tab 20 extends to the outside of the cell to form the positive electrode tab 21. In the process of manufacturing the positive current collector, the positive electrode lug 21 can be formed on the edge of the positive current collector through laser die cutting, so that the diameter of the winding core is prevented from being increased due to the positive electrode lug, the energy density of the battery core is improved, and the positive electrode lug is not required to be welded on the edge of the positive current collector.
The edge of the negative current collector of the negative electrode sheet 30 extends to the outside of the battery cell to form a negative electrode tab 31. In the process of manufacturing the negative current collector, the negative electrode lug 31 can be formed at the edge of the negative current collector through laser die cutting, so that the diameter of the winding core is prevented from being increased due to the negative electrode lug, the energy density of the battery core is improved, and the negative electrode lug is not required to be welded at the edge of the negative current collector.
In some embodiments, the positive current collector of the positive electrode tab 20 and the positive electrode tab 21 may be the same material. As shown in fig. 11, in the process of manufacturing the positive electrode sheet 20, the positive electrode tab 21 may be directly formed at the edge of the positive current collector 22 by laser die cutting, so as to avoid electrochemical reactions caused by different materials of the positive current collector and the positive electrode tab 21.
Alternatively, the negative current collector of negative electrode tab 30 is the same material as negative electrode tab 31. In the process of manufacturing the negative plate 30, the negative electrode lug 31 can be directly formed at the edge of the negative current collector through laser die cutting, so that electrochemical reaction caused by different materials of the negative current collector and the negative electrode lug 31 is avoided.
The electronic equipment of the embodiment of the application comprises:
the battery described in the above embodiment. The electronic equipment with the battery in the embodiment avoids equipment bottom noise caused by overcurrent in the process of discharging the battery core.
The electronic device may include one or more of a cell phone, a computer, a smart wearable device, an earphone, a hearing aid, a stethoscope. For example, the electronic equipment can be an earphone or a hearing aid, and in the using process of the electronic equipment, equipment bottom noise caused by overcurrent can be avoided in the discharging process of the battery cell, so that the using experience is improved.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims (10)

1. A battery, comprising:
a housing having a chamber;
the battery cell is arranged in the cavity, and is formed by winding a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, wherein the positive plate is connected with a positive lug, and the negative plate is connected with a negative lug;
the inner side wall of the cavity is provided with a boss, and at least one of the positive electrode lug and the negative electrode lug is electrically connected with the boss.
2. The battery of claim 1, wherein the boss comprises a first boss and a second boss arranged at intervals, the cell is arranged between the first boss and the second boss, the positive tab is electrically connected with the first boss, and the negative tab is electrically connected with the second boss.
3. The battery of claim 2, wherein a surface of the first boss has a first plane, the positive tab being electrically connected to the first plane; and/or
The surface of the second boss is provided with a second plane, and the negative electrode lug is electrically connected with the second plane.
4. The battery of claim 3, wherein one end of the positive tab is electrically connected to a positive current collector of the positive tab, and the other end of the positive tab is parallel to and electrically connected to the first plane; and/or
One end of the negative electrode lug is electrically connected with the negative current collector of the negative electrode plate, and the other end of the negative electrode lug is parallel to and electrically connected with the second plane; and/or
The region where the positive electrode lug is connected to the first plane and the region where the negative electrode lug is connected to the second plane are arranged in parallel.
5. The battery of claim 2, wherein the chamber has a first inner sidewall and a second inner sidewall disposed in spaced relation, the first boss being disposed on the first inner sidewall and the second boss being disposed on the second inner sidewall.
6. The battery of claim 2, wherein the housing comprises a first housing having a first chamber with a first opening and a second housing having a second chamber with a second opening, the first boss being disposed at a bottom wall of the first chamber, the second boss being disposed at a bottom wall of the second chamber;
one end of the first shell with a first opening stretches into the second cavity, and the first cavity is communicated with the second cavity to form the cavity.
7. The battery of claim 6, wherein the first housing and the second housing are pieces of conductive material, the first housing being insulated from the second housing; and/or
An insulating sealing structure is arranged between the outer side wall of the first shell and the inner side wall of the second cavity.
8. The battery of claim 2, wherein the battery is configured to provide the battery with a plurality of cells,
the number of the positive lugs is a plurality of, and the number of the first bosses is one; and/or
The number of the negative electrode lugs is multiple, and the number of the second bosses is one.
9. The battery according to claim 1, wherein an edge of the positive current collector of the positive electrode tab extends to the outside of the cell to form the positive electrode tab; and/or
The edge of the negative current collector of the negative plate extends to the outside of the battery cell to form the negative electrode lug.
10. The battery of claim 9, wherein the positive current collector of the positive tab is the same material as the positive tab; and/or
The negative current collector of the negative plate is the same as the negative electrode lug.
CN202311131693.3A 2023-09-04 2023-09-04 Battery cell Pending CN117039352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311131693.3A CN117039352A (en) 2023-09-04 2023-09-04 Battery cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311131693.3A CN117039352A (en) 2023-09-04 2023-09-04 Battery cell

Publications (1)

Publication Number Publication Date
CN117039352A true CN117039352A (en) 2023-11-10

Family

ID=88628255

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311131693.3A Pending CN117039352A (en) 2023-09-04 2023-09-04 Battery cell

Country Status (1)

Country Link
CN (1) CN117039352A (en)

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