WO2024098898A1 - Battery cell and electric device - Google Patents

Battery cell and electric device Download PDF

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Publication number
WO2024098898A1
WO2024098898A1 PCT/CN2023/115633 CN2023115633W WO2024098898A1 WO 2024098898 A1 WO2024098898 A1 WO 2024098898A1 CN 2023115633 W CN2023115633 W CN 2023115633W WO 2024098898 A1 WO2024098898 A1 WO 2024098898A1
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WO
WIPO (PCT)
Prior art keywords
insulating film
battery cell
explosion
side walls
side wall
Prior art date
Application number
PCT/CN2023/115633
Other languages
French (fr)
Chinese (zh)
Inventor
王洋
杨伟
Original Assignee
欣旺达动力科技股份有限公司
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Publication of WO2024098898A1 publication Critical patent/WO2024098898A1/en

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H01M50/497—Ionic conductivity
    • 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
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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

Definitions

  • the embodiments of the present application relate to but are not limited to battery cells and electrical equipment.
  • the battery usually includes a shell, an electrode assembly contained in the shell, and an insulating film covering the outer surface of the shell.
  • ensuring the reliability of the insulating film while improving the safety performance of the battery is also one of the effective ways to solve the above problems. Therefore, how to ensure the reliability of the insulating film while improving the safety performance of the battery has become an urgent problem to be solved.
  • the present application provides a battery cell and an electrical device to achieve reliable insulation protection for the battery cell shell, thereby improving the safety performance and reliability of the battery cell.
  • an embodiment of the present application provides a battery cell, the battery cell comprising:
  • a housing having two first side walls opposite to each other in a first direction, two second side walls opposite to each other in a second direction, and two third side walls opposite to each other in a third direction;
  • a plurality of insulating films disposed on the first side wall and the third side wall;
  • the first direction, the second direction and the third direction are mutually perpendicular in pairs; an explosion-proof valve and a wall surface are provided on one of the first side walls, the insulating film is provided on at least a portion of the wall surface, and poles are provided on both of the second side walls.
  • the insulating film includes a first insulating film and a second insulating film
  • the first insulating film covers the third side wall and one of the first side walls without the explosion-proof valve
  • the second insulating film covers the wall surface.
  • the first insulating film has a third portion and a fourth portion connected to each other;
  • the third part covers the third side wall and one of the first side walls without the explosion-proof valve, and the fourth part at least partially covers the wall surface;
  • the fourth portion overlaps with the second insulating film and forms an overlapping area on both sides in the third direction.
  • the size of the shell is A
  • the size of the overlapping area is B
  • the size of the explosion-proof valve is C, satisfying: B ⁇ (A-C)/2.
  • the distance between the explosion-proof valve and the two second side walls is greater than 0;
  • the second insulating films include two films, and the two second insulating films are respectively arranged on both sides of the explosion-proof valve in the second direction.
  • the first insulating film and the second insulating film further cover a portion of the second side wall
  • the pole is exposed relative to the insulating film.
  • the second insulating film has a first portion and a second portion connected to each other;
  • the first portion of the second insulating film is coated on the first side wall provided with the explosion-proof valve, and the second portion of the second insulating film is coated on the second side wall.
  • the first portion and the second portion are perpendicular to each other.
  • the first insulating film further has a fifth portion extending along the second direction, and the fifth portion covers part of the second side wall.
  • the battery cell further includes a third insulating film
  • the third insulating film covers a portion of the second side wall, and the pole is exposed relative to the third insulating film.
  • the insulating film includes a first insulating film and a second insulating film
  • the first insulating film and the second insulating film are each provided with a notch, and the shape and position of the notch correspond to the shape and position of the explosion-proof valve;
  • the first insulating film and the second insulating film are respectively sandwiched on both sides of the shell in the third direction and each covers one of the third side walls, and the first insulating film and the second insulating film both cover the wall surface and a part of the second side wall;
  • the notch on the first insulating film and the notch on the second insulating film face each other and enclose a avoidance hole, and the explosion-proof valve passes through the avoidance hole.
  • the first insulating film and the second insulating film overlap each other on the two first side walls.
  • the first insulating film and the second insulating film overlap each other on the two first side walls and the two second side walls.
  • the first insulating film and the second insulating film overlap each other.
  • an embodiment of the present application provides an electrical device, wherein the electrical device includes the above-mentioned battery cell.
  • multiple insulating films are provided on the shell to achieve reliable insulation protection for the battery cell shell, thereby improving the safety and reliability of the battery cell, while allowing the pole and the explosion-proof valve to be exposed without being blocked by the insulating film;
  • the multiple insulating films with a split design provided in the present application can avoid the problem of digging holes, and avoid the problem of wrinkles and bubbles in the insulating film caused by the holes for the explosion-proof valve to pass through during the coating and rolling process, thereby significantly improving the product yield while increasing production capacity, and avoiding material waste caused by digging holes in the entire insulating film, saving production costs.
  • the present application provides a design scheme for covering an insulating film for a battery cell in which a pole is provided on each of the two end side walls and an explosion-proof valve is provided on a side wall between the two poles. This scheme ensures that the explosion-proof valve is exposed while eliminating the need for punching holes in the insulating film, thereby reducing production processes, shortening the product production cycle, and reducing production costs.
  • the battery cell provided in the present application and the insulating film used therein are easy to form and assemble, which simplifies the production process while ensuring product quality, thereby increasing production capacity.
  • FIG1 is a schematic diagram of the structure of a battery cell provided in the first embodiment of the present application.
  • FIG2 is a schematic structural diagram of the first insulating film in the battery cell in FIG1 in an unfolded state
  • FIG3 is a partial enlarged schematic diagram of area A in FIG1 ;
  • FIG4 is a schematic diagram of the structure of a battery cell provided in the second embodiment of the present application.
  • FIG. 5 is an exploded view of the battery cell in FIG. 4 .
  • a battery cell refers to a cup, trough or other container or part of a composite container that contains an electrolyte solution and a metal electrode to generate an electric current. It is a device that can convert chemical energy into electrical energy. Most electrical devices, such as mobile phones, tablet computers, and camera devices, use batteries as energy sources. Batteries can provide long-term and stable power to various electrical devices and play a great role in the lives of the public. Among them, the insulating film covering the outer surface of the battery cell is often processed by hollowing out a hole at the location of the explosion-proof valve to allow the explosion-proof valve to pass through.
  • This method of digging holes in the insulating film inevitably requires the insulating film to undergo at least one digging process, which inevitably increases certain production costs, and the insulating sheet dug out by punching will also cause a certain amount of raw material waste.
  • the hole position itself may cause bubbles and wrinkles and other poor appearance when the perforated insulating film is wrapped on the outer surface of the battery cell, and even damage the explosion-proof valve on the battery cell during the rolling process.
  • the present application provides a battery cell to achieve reliable insulation protection for the shell of the battery cell, thereby improving the safety performance and reliability of the battery cell.
  • the structure of the battery cell will be described in detail below.
  • a battery cell has a first direction 01, a second direction 02, and a third direction 03 that are perpendicular to each other, and the battery cell includes: a shell 1 having two opposite first side walls 11 in the first direction 01, two opposite second side walls 12 in the second direction 02, and two opposite third side walls 13 in the third direction 03; and an insulating film 2, which is arranged on the first side wall 11 and the third side wall 13; wherein an explosion-proof valve 3 and a wall surface 110 are arranged on one first side wall 11, the insulating film 2 is arranged on at least a portion of the wall surface 110, and poles 4 are arranged on both second side walls 12.
  • the above design enables the insulating film 2 to provide reliable coating protection for the shell 1 of the battery cell, improving Moreover, compared with the solution of "digging holes in a whole insulating film to expose the explosion-proof valve", the multiple insulating films 2 with split design provided in the present application can avoid the above-mentioned digging problem, and avoid the problem that the holes for the explosion-proof valve 3 to pass through will cause wrinkles and bubbles in the insulating film during the coating and rolling process, thereby significantly improving the product yield while increasing production capacity, avoiding the waste of materials caused by digging holes in the whole insulating film, and saving production costs.
  • the insulating film 2 includes a first insulating film 21 and a second insulating film 22; the first insulating film 21 covers the third side wall 13 and a first side wall 11 without an explosion-proof valve 3; the second insulating film 22 covers the wall surface 110.
  • the insulating film 2 covering the outer surface of the battery cell is often processed by hollowing out a hole at the location of the explosion-proof valve 3 to allow the explosion-proof valve 3 to pass through.
  • This solution of digging holes in the insulating film 2 inevitably requires the insulating film 2 to undergo at least one digging process, which inevitably increases a certain production cost, and the punched insulating sheet will also cause a certain amount of raw material waste.
  • the present application adopts the above-mentioned scheme and uses two split-design insulating films 2 to encapsulate the shell 1 of the battery cell for protection.
  • the split-design insulating film 2 can provide reliable encapsulation protection for the battery cell and improve the safety of the battery cell while solving the above-mentioned problems of waste of raw materials, complicated processes, and poor appearance of the product after encapsulation.
  • the insulating film 2 in the battery cell provided in the present application adopts a split design, which is convenient for the coating and assembly process, and can also ensure that the insulating film 2 is not easy to wrinkle when being bonded, and the bonding is more reliable, so that the bonding effect of the insulating film 2 is better and the service life of the battery cell is extended.
  • the first insulating film 21 has a third portion 211 and a fourth portion 212 connected to each other; the fourth portion 212 is connected to the third portion 211, the third portion 211 covers the third side wall 13 and a first side wall 11 without an explosion-proof valve 3, and the fourth portion 212 at least partially covers the wall surface 110; on the first side wall 11 with the explosion-proof valve 3, the fourth portion 212 overlaps with the second insulating film 22, and forms an overlapping area 5 on both sides in the third direction 03.
  • the above design enables the first insulating film 21 and the second insulating film 22 to achieve good and complete protection of the housing 1, and improves the coating protection effect and reliability of the battery cell.
  • each of the split-type insulating films 2 can achieve a more complete encapsulation protection effect on the shell 1, and will not cause wrinkles and other poor appearance problems due to poor size matching.
  • the distance between the explosion-proof valve 3 and the two second side walls 12 is greater than 0; for example, the explosion-proof valve 3 can be arranged at the center of the first side wall 11 in the second direction 02, and the second insulating film 22 includes two, and the two second insulating films 22 are respectively arranged on both sides of the explosion-proof valve 3 in the second direction 02.
  • the explosion-proof valve 3 designed as above and the battery cell having the explosion-proof valve 3 can be adapted to more design solutions with special requirements, and the two second insulating films 22 can provide reliable protection for the shell 1 of the battery cell to improve the safety of the battery cell.
  • the first insulating film 21 and the second insulating film 22 further cover a portion of the second side wall 12; the pole 4 is exposed relative to the insulating film 2. It can be understood that the first insulating film 21 and the second insulating film 22 each extend a portion to cover and protect the second side wall 12 provided with the pole 4, so as to further enhance the degree of protection for the battery cell, thereby further enhancing the safety of the battery cell.
  • the second insulating film 22 has a first portion 221 and a second portion 222 connected to each other; the first portion 221 of the second insulating film 22 is coated on the wall surface 110, and the second portion 222 of the second insulating film 22 is coated on the second side wall 12. It can be understood that the first portion 221 of the second insulating film 2 provides protection for the first side wall 11 provided with the explosion-proof valve 3, and the second portion 222 of the second insulating film 2 provides protection for the second side wall 12 provided with the pole 4.
  • the first insulating film 21 also has a fifth portion 213 extending along the second direction 02, and the fifth portion 213 covers part of the second side wall 12, so that the insulating film 2 covers the shell 1 of the battery cell more comprehensively, further improving the insulation protection effect of the battery cell.
  • the first part 221 and the second part 222 are connected to each other.
  • the first part 221 and the second part 222 can be set to be perpendicular to each other to adapt to the first side wall 11 and the second side wall 12 that are perpendicular to each other, so that the second insulating film 22 and the outer shape of the shell 1 are adapted to each other, which is convenient for fool-proofing during processing and improves production capacity, so that the battery cell obtains better coating protection effect.
  • the battery cell further includes a third insulating film (not shown); the third insulating film is coated on a portion of the second side wall 12, and the pole 4 is exposed relative to the third insulating film; the third insulating film can provide a coating protection effect for the second side wall 12. Specifically, the third insulating film can overlap with the second portion 222 of the second insulating film 22 to further enhance the protection of the second side wall 12. The protective effect of the coating.
  • the insulating film 2 includes a first insulating film 21 and a second insulating film 22; a notch 23 is provided on each of the first insulating film 21 and the second insulating film 22, and the shape and position of the notch 23 correspond to the shape and position of the explosion-proof valve 3; the first insulating film 21 and the second insulating film 22 are respectively sandwiched on both sides of the shell 1 in the third direction 03 and each covers a third side wall 13, and the first insulating film 21 and the second insulating film 22 both cover the wall surface 110 and part of the second side wall 12; the notch 23 on the first insulating film 21 and the notch 23 on the second insulating film 22 face each other and enclose to form an avoidance hole 6, and the explosion-proof valve 3 passes through the avoidance hole 6.
  • the avoidance hole 6 is formed by enclosing two independent, split-designed first insulating films 21 and second insulating films 22, which is different from the technical solution of digging an opening on a whole insulating film 2.
  • the two insulating films 2 of the above-mentioned clamping design can clamp the shell 1 on both sides of the shell 1 to form a protective envelope, and solve the problem of poor appearance such as wrinkles and bubbles caused by "digging holes in the envelope" in the envelope solution, and also solve the problem of material waste caused by digging holes.
  • the first insulating film 21 and the second insulating film 22 overlap each other to form a more reliable film protection for the housing 1 , thereby improving the safety of the battery cell.
  • the first insulating film 21 and the second insulating film 22 overlap each other to form an overlapping area 5 ; further, on the second side wall 12 , the first insulating film 21 and the second insulating film 22 overlap each other to form another overlapping portion (not numbered) to achieve a more complete insulating film protection effect for the battery cell housing 1 .
  • the embodiments of the present application further provide an electrical device, which includes a battery cell as in Embodiment 1, and may specifically be an electric car.

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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)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

Disclosed are a battery cell and an electric device. The battery cell has a first direction, a second direction and a third direction which are perpendicular to each other. The battery cell comprises: a shell, which is provided with two opposite first side walls in the first direction, two opposite second side walls in the second direction, and two opposite third side walls in the third direction; and a plurality of insulating films, which are arranged on the first side walls and the third side walls, wherein one of the first side walls is provided with an explosion-proof valve and a wall surface, the insulating films are arranged on at least part of the wall surface, and the two second side walls are both provided with electrode columns. The electric device comprises the battery cell. The insulating films on the battery cell provided in the present application can provide insulation protection for the shell of the battery cell, thereby improving the safety performance and reliability of the battery cell.

Description

电芯及用电设备Battery cells and electrical equipment
本申请要求于2022年11月08日提交中国专利局、申请号为202222975862.9、名称为“电芯及用电设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application filed with the China Patent Office on November 8, 2022, with application number 202222975862.9 and title “Battery Cells and Electrical Equipment”, all contents of which are incorporated by reference in this application.
技术领域Technical Field
本申请的实施例涉及但不限于电芯及用电设备。The embodiments of the present application relate to but are not limited to battery cells and electrical equipment.
背景技术Background technique
新能源汽车替代传统燃油汽车，对改善全球交通运输业所面临的能源及污染等问题具有重要的意义，也是大势所趋，其中，动力电池作为新能源汽车的关键组成部分而备受关注，动力电池的性能直接影响新能源汽车的续航里程、充电时间、安全性能等关键指标。The replacement of traditional fuel vehicles with new energy vehicles is of great significance to improving the energy and pollution problems faced by the global transportation industry, and it is also a general trend. Among them, power batteries, as a key component of new energy vehicles, have attracted much attention. The performance of power batteries directly affects key indicators such as the range, charging time, and safety performance of new energy vehicles.
电池通常包括壳体、收容于壳体内的电极组件和覆盖于壳体的外表面的绝缘膜。绝缘膜作为电池的核心部分之一，保证绝缘膜的可靠性的同时提升电池的安全性能也是解决上述问题的有效途径之一。因此，如何保证绝缘膜的可靠性的同时提升电池的安全性能成为亟待解决的问题。The battery usually includes a shell, an electrode assembly contained in the shell, and an insulating film covering the outer surface of the shell. As one of the core parts of the battery, ensuring the reliability of the insulating film while improving the safety performance of the battery is also one of the effective ways to solve the above problems. Therefore, how to ensure the reliability of the insulating film while improving the safety performance of the battery has become an urgent problem to be solved.
技术解决方案Technical Solutions
本申请提供一种电芯及用电设备，以对电芯的壳体实现可靠的绝缘保护，改善了电芯的安全性能以及可靠性。The present application provides a battery cell and an electrical device to achieve reliable insulation protection for the battery cell shell, thereby improving the safety performance and reliability of the battery cell.
第一方面，本申请实施例提供一种电芯，所述电芯包括：In a first aspect, an embodiment of the present application provides a battery cell, the battery cell comprising:
壳体，在第一方向上具有相对的两个第一侧壁，在第二方向上具有相对的两个第二侧壁，在第三方向上具有相对的两个第三侧壁；以及A housing having two first side walls opposite to each other in a first direction, two second side walls opposite to each other in a second direction, and two third side walls opposite to each other in a third direction; and
多个绝缘膜，设于所述第一侧壁和第三侧壁上；A plurality of insulating films, disposed on the first side wall and the third side wall;
其中，所述第一方向、第二方向和第三方向两两相互垂直；一个所述第一侧壁上设有防爆阀以及壁面，所述绝缘膜设于至少部分的所述壁面上两个所述第二侧壁上均设有极柱。The first direction, the second direction and the third direction are mutually perpendicular in pairs; an explosion-proof valve and a wall surface are provided on one of the first side walls, the insulating film is provided on at least a portion of the wall surface, and poles are provided on both of the second side walls.
在一些实施例中，所述绝缘膜包括第一绝缘膜和第二绝缘膜；In some embodiments, the insulating film includes a first insulating film and a second insulating film;
所述第一绝缘膜包覆所述第三侧壁以及未设有所述防爆阀的一个所述第一侧壁； The first insulating film covers the third side wall and one of the first side walls without the explosion-proof valve;
所述第二绝缘膜包覆所述壁面。The second insulating film covers the wall surface.
在一些实施例中，所述第一绝缘膜具有相互连接的第三部分和第四部分；In some embodiments, the first insulating film has a third portion and a fourth portion connected to each other;
所述第三部分包覆所述第三侧壁以及未设有所述防爆阀的一个所述第一侧壁，所述第四部分至少部分包覆所述壁面；The third part covers the third side wall and one of the first side walls without the explosion-proof valve, and the fourth part at least partially covers the wall surface;
在设有所述防爆阀的所述第一侧壁上，所述第四部分与所述第二绝缘膜重叠，并在所述第三方向上的两侧各形成一重叠区。On the first side wall where the explosion-proof valve is disposed, the fourth portion overlaps with the second insulating film and forms an overlapping area on both sides in the third direction.
在一些实施例中，在所述第三方向上，所述壳体的尺寸为A，所述重叠区的尺寸为B，所述防爆阀的尺寸为C，满足：B≤(A-C)/2。In some embodiments, in the third direction, the size of the shell is A, the size of the overlapping area is B, and the size of the explosion-proof valve is C, satisfying: B≤(A-C)/2.
在一些实施例中，所述防爆阀与两个所述第二侧壁之间的距离均大于0；In some embodiments, the distance between the explosion-proof valve and the two second side walls is greater than 0;
所述第二绝缘膜包括两个，两个所述第二绝缘膜分别设于所述防爆阀在所述第二方向上的两侧。The second insulating films include two films, and the two second insulating films are respectively arranged on both sides of the explosion-proof valve in the second direction.
在一些实施例中，所述第一绝缘膜和第二绝缘膜还包覆部分所述第二侧壁；In some embodiments, the first insulating film and the second insulating film further cover a portion of the second side wall;
所述极柱相对于所述绝缘膜露出。The pole is exposed relative to the insulating film.
在一些实施例中，所述第二绝缘膜具有相互连接的第一部分和第二部分；In some embodiments, the second insulating film has a first portion and a second portion connected to each other;
所述第二绝缘膜的第一部分包覆于设有所述防爆阀的所述第一侧壁上，所述第二绝缘膜的第二部分包覆于所述第二侧壁上。The first portion of the second insulating film is coated on the first side wall provided with the explosion-proof valve, and the second portion of the second insulating film is coated on the second side wall.
在一些实施例中，所述第一部分与所述第二部分相互垂直。In some embodiments, the first portion and the second portion are perpendicular to each other.
在一些实施例中，所述第一绝缘膜还具有沿所述第二方向延伸出的第五部分，所述第五部分包覆部分的所述第二侧壁。In some embodiments, the first insulating film further has a fifth portion extending along the second direction, and the fifth portion covers part of the second side wall.
在一些实施例中，所述电芯还包括第三绝缘膜；In some embodiments, the battery cell further includes a third insulating film;
所述第三绝缘膜包覆于部分所述第二侧壁上，并且所述极柱相对于所述第三绝缘膜露出。The third insulating film covers a portion of the second side wall, and the pole is exposed relative to the third insulating film.
在一些实施例中，所述绝缘膜包括第一绝缘膜和第二绝缘膜；In some embodiments, the insulating film includes a first insulating film and a second insulating film;
所述第一绝缘膜和第二绝缘膜上各设有一缺口，所述缺口的形状和位置与防爆阀的形状和位置为相对应；The first insulating film and the second insulating film are each provided with a notch, and the shape and position of the notch correspond to the shape and position of the explosion-proof valve;
所述第一绝缘膜和第二绝缘膜分别夹设于所述壳体在所述第三方向上的两侧并且各包覆一所述第三侧壁，所述第一绝缘膜和第二绝缘膜均包覆所述壁面以及部分所述第二侧壁； The first insulating film and the second insulating film are respectively sandwiched on both sides of the shell in the third direction and each covers one of the third side walls, and the first insulating film and the second insulating film both cover the wall surface and a part of the second side wall;
位于所述第一绝缘膜上的所述缺口与位于所述第二绝缘膜上的所述缺口彼此朝向相对并围合形成避让孔，所述防爆阀穿过所述避让孔。The notch on the first insulating film and the notch on the second insulating film face each other and enclose a avoidance hole, and the explosion-proof valve passes through the avoidance hole.
在一些实施例中，在两个所述第一侧壁上，所述第一绝缘膜和第二绝缘膜相互重叠。In some embodiments, the first insulating film and the second insulating film overlap each other on the two first side walls.
在一些实施例中，在两个所述第一侧壁和两个所述第二侧壁上，所述第一绝缘膜和第二绝缘膜相互重叠。In some embodiments, the first insulating film and the second insulating film overlap each other on the two first side walls and the two second side walls.
在一些实施例中，在两个所述第二侧壁上，所述第一绝缘膜和第二绝缘膜相互重叠。In some embodiments, on the two second side walls, the first insulating film and the second insulating film overlap each other.
第二方面，本申请实施例提供一种用电设备，所述用电设备包括上述的电芯。In a second aspect, an embodiment of the present application provides an electrical device, wherein the electrical device includes the above-mentioned battery cell.
本申请中通过在壳体上设有多个绝缘膜，以为电芯壳体实现可靠的绝缘保护，提升了电芯的安全性以及可靠性，同时使得极柱与防爆阀露出不受绝缘膜遮挡；，本申请提供的分体式设计的多个绝缘膜可以避免挖孔问题，避免了供防爆阀穿过的孔位会导致绝缘膜在包覆辊压过程中出现褶皱、气泡的问题，从而在提高产能的同时显著提升了产品良率，也避免了在整块绝缘膜上挖孔导致的材料浪费，节省了生产成本。In the present application, multiple insulating films are provided on the shell to achieve reliable insulation protection for the battery cell shell, thereby improving the safety and reliability of the battery cell, while allowing the pole and the explosion-proof valve to be exposed without being blocked by the insulating film; the multiple insulating films with a split design provided in the present application can avoid the problem of digging holes, and avoid the problem of wrinkles and bubbles in the insulating film caused by the holes for the explosion-proof valve to pass through during the coating and rolling process, thereby significantly improving the product yield while increasing production capacity, and avoiding material waste caused by digging holes in the entire insulating film, saving production costs.
本申请在两端侧壁上各设有一极柱且在两个极柱之间的一侧壁上设有防爆阀的电芯提供了一种包覆绝缘膜的设计方案，实现了在保证防爆阀露出的同时，使绝缘膜无需进行冲孔，减少生产工序，缩短了产品的生产周期，减少了生产成本。The present application provides a design scheme for covering an insulating film for a battery cell in which a pole is provided on each of the two end side walls and an explosion-proof valve is provided on a side wall between the two poles. This scheme ensures that the explosion-proof valve is exposed while eliminating the need for punching holes in the insulating film, thereby reducing production processes, shortening the product production cycle, and reducing production costs.
本申请提供的电芯及其所采用的绝缘膜均容易成型以及组装加工，在保证产品质量的同时简化了生产工序，进而提高产能。The battery cell provided in the present application and the insulating film used therein are easy to form and assemble, which simplifies the production process while ensuring product quality, thereby increasing production capacity.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本申请说明书的第一实施方式提供的电芯的结构示意图；FIG1 is a schematic diagram of the structure of a battery cell provided in the first embodiment of the present application;
图2为图1中的电芯中的第一绝缘膜在展开状态下的结构示意图；FIG2 is a schematic structural diagram of the first insulating film in the battery cell in FIG1 in an unfolded state;
图3为图1中A区域的局部放大示意图；FIG3 is a partial enlarged schematic diagram of area A in FIG1 ;
图4为本申请说明书的第二实施方式提供的电芯的结构示意图；FIG4 is a schematic diagram of the structure of a battery cell provided in the second embodiment of the present application;
图5为图4中的电芯的***图。FIG. 5 is an exploded view of the battery cell in FIG. 4 .
附图标记说明：
01、第一方向；02、第二方向；03、第三方向；
1、壳体；11、第一侧壁；110、壁面；12、第二侧壁；13、第三侧壁；
2、绝缘膜；21、第一绝缘膜；211、第三部分；212、第四部分；22、第
二绝缘膜；221-第一部分；222-第二部分；23-缺口；
3、防爆阀；4、极柱；5、重叠区；6、避让孔。Description of reference numerals:
01, first direction; 02, second direction; 03, third direction;
1. Shell; 11. First side wall; 110. Wall surface; 12. Second side wall; 13. Third side wall;
2. Insulating film; 21. First insulating film; 211. Third part; 212. Fourth part; 22. Second insulating film; 221-First part; 222-Second part; 23-Notch;
3. Explosion-proof valve; 4. Pole; 5. Overlap area; 6. Avoidance hole.
本申请的实施方式Embodiments of the present application
本申请提供一种电芯及用电设备，以下参照附图并举实施例对本申请进一步详细说明。可以理解的，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。The present application provides a battery cell and an electrical device, and the present application is further described in detail below with reference to the accompanying drawings and examples. It can be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.
电芯指盛有电解质溶液和金属电极以产生电流的杯、槽或其他容器或复合容器的部分空间，能将化学能转化成电能的装置。大部分用电设备，例如手机、平板电脑、摄像装置等，均利用电池作为能量来源，电池能够向各用电设备长时间稳定的供电，在公众的生活中发挥着很大的作用。其中，覆盖于电芯外表面的绝缘膜在防爆阀所在位置处往往是通过挖空开孔的方式加工出一个供防爆阀穿过的避让孔，这种在绝缘膜上挖孔的方案无可避免地需要让绝缘膜经历至少一道挖孔工序，也就不可避免地要增加一定的生产成本，并且冲孔挖出的绝缘片也会造成一定的原料浪费。不仅如此，绝缘膜在完成冲孔之后，在将带孔绝缘膜包覆在电芯外表面上时孔位本身则可能导致气泡和褶皱等不良外观，甚至是在辊压过程中对电芯上的防爆阀造成损伤。A battery cell refers to a cup, trough or other container or part of a composite container that contains an electrolyte solution and a metal electrode to generate an electric current. It is a device that can convert chemical energy into electrical energy. Most electrical devices, such as mobile phones, tablet computers, and camera devices, use batteries as energy sources. Batteries can provide long-term and stable power to various electrical devices and play a great role in the lives of the public. Among them, the insulating film covering the outer surface of the battery cell is often processed by hollowing out a hole at the location of the explosion-proof valve to allow the explosion-proof valve to pass through. This method of digging holes in the insulating film inevitably requires the insulating film to undergo at least one digging process, which inevitably increases certain production costs, and the insulating sheet dug out by punching will also cause a certain amount of raw material waste. In addition, after the insulating film is punched, the hole position itself may cause bubbles and wrinkles and other poor appearance when the perforated insulating film is wrapped on the outer surface of the battery cell, and even damage the explosion-proof valve on the battery cell during the rolling process.
实施例1Example 1
本申请提供一种电芯，以对电芯的壳体实现可靠的绝缘保护，改善了电芯的安全性能以及可靠性。以下将对该电芯的结构进行详细介绍。The present application provides a battery cell to achieve reliable insulation protection for the shell of the battery cell, thereby improving the safety performance and reliability of the battery cell. The structure of the battery cell will be described in detail below.
如图1和图2所示，本申请的一些实施例中，一种电芯具有两两相互垂直的第一方向01、第二方向02和第三方向03，该电芯包括：壳体1，在第一方向01上具有相对的两个第一侧壁11，在第二方向02上具有相对的两个第二侧壁12，在第三方向03上具有相对的两个第三侧壁13；以及绝缘膜2，设于第一侧壁11和第三侧壁13上；其中，一个第一侧壁11上设有防爆阀3以及壁面110，绝缘膜2设于至少部分的壁面110上，两个第二侧壁12上均设有极柱4。上述设计使得绝缘膜2可为电芯的壳体1提供可靠的包膜保护，提升 了电芯的安全性能。不仅如此，相较于“在一整块绝缘膜上挖孔以使防爆阀露出”的方案，本申请提供的分体式设计的多个绝缘膜2可以避免上述的挖孔问题，避免了供防爆阀3穿过的孔位会导致绝缘膜在包覆辊压过程中出现褶皱、气泡的问题，从而在提高产能的同时显著提升了产品良率，也避免了在整块绝缘膜上挖孔导致的材料浪费，节省了生产成本。As shown in FIG. 1 and FIG. 2, in some embodiments of the present application, a battery cell has a first direction 01, a second direction 02, and a third direction 03 that are perpendicular to each other, and the battery cell includes: a shell 1 having two opposite first side walls 11 in the first direction 01, two opposite second side walls 12 in the second direction 02, and two opposite third side walls 13 in the third direction 03; and an insulating film 2, which is arranged on the first side wall 11 and the third side wall 13; wherein an explosion-proof valve 3 and a wall surface 110 are arranged on one first side wall 11, the insulating film 2 is arranged on at least a portion of the wall surface 110, and poles 4 are arranged on both second side walls 12. The above design enables the insulating film 2 to provide reliable coating protection for the shell 1 of the battery cell, improving Moreover, compared with the solution of "digging holes in a whole insulating film to expose the explosion-proof valve", the multiple insulating films 2 with split design provided in the present application can avoid the above-mentioned digging problem, and avoid the problem that the holes for the explosion-proof valve 3 to pass through will cause wrinkles and bubbles in the insulating film during the coating and rolling process, thereby significantly improving the product yield while increasing production capacity, avoiding the waste of materials caused by digging holes in the whole insulating film, and saving production costs.
如图1和图2所示，本申请的一些实施例中，绝缘膜2包括第一绝缘膜21和第二绝缘膜22；第一绝缘膜21包覆第三侧壁13以及未设有防爆阀3的一个第一侧壁11；第二绝缘膜22包覆壁面110。目前，覆盖于电芯外表面的绝缘膜2在防爆阀3所在位置处往往是通过挖空开孔的方式加工出一个供防爆阀3穿过的避让孔，这种在绝缘膜2上挖孔的方案无可避免地需要让绝缘膜2经历至少一道挖孔工序，也就不可避免地要增加一定的生产成本，并且冲孔挖出的绝缘片也会造成一定的原料浪费。不仅如此，绝缘膜2在完成冲孔之后，在将带孔的绝缘膜2包覆在电芯外表面上时孔位本身则可能导致气泡和褶皱等不良外观，甚至是在辊压过程中对电芯上的防爆阀造成损伤。因此，本申请通过上述的方案，采用分体式设计的两块绝缘膜2来对电芯的壳体1进行包膜保护，该分体式设计的绝缘膜2可在为电芯实现可靠的包膜保护提升电芯安全性的同时，解决上述的原料浪费、工艺繁杂、包覆后产品外观不佳的问题。As shown in Figures 1 and 2, in some embodiments of the present application, the insulating film 2 includes a first insulating film 21 and a second insulating film 22; the first insulating film 21 covers the third side wall 13 and a first side wall 11 without an explosion-proof valve 3; the second insulating film 22 covers the wall surface 110. At present, the insulating film 2 covering the outer surface of the battery cell is often processed by hollowing out a hole at the location of the explosion-proof valve 3 to allow the explosion-proof valve 3 to pass through. This solution of digging holes in the insulating film 2 inevitably requires the insulating film 2 to undergo at least one digging process, which inevitably increases a certain production cost, and the punched insulating sheet will also cause a certain amount of raw material waste. In addition, after the insulating film 2 is punched, when the insulating film 2 with holes is wrapped on the outer surface of the battery cell, the hole position itself may cause bubbles and wrinkles and other bad appearances, and even damage the explosion-proof valve on the battery cell during the rolling process. Therefore, the present application adopts the above-mentioned scheme and uses two split-design insulating films 2 to encapsulate the shell 1 of the battery cell for protection. The split-design insulating film 2 can provide reliable encapsulation protection for the battery cell and improve the safety of the battery cell while solving the above-mentioned problems of waste of raw materials, complicated processes, and poor appearance of the product after encapsulation.
可以理解的，本申请提供的电芯中的绝缘膜2采用分体式设计，便于包覆组装过程的进行，也能保证在绝缘膜2贴合时不易起褶皱，粘结更牢靠，使绝缘膜2的贴合效果更好，延长电芯的使用寿命。It can be understood that the insulating film 2 in the battery cell provided in the present application adopts a split design, which is convenient for the coating and assembly process, and can also ensure that the insulating film 2 is not easy to wrinkle when being bonded, and the bonding is more reliable, so that the bonding effect of the insulating film 2 is better and the service life of the battery cell is extended.
如图1至图3所示，本申请的一些实施例中，第一绝缘膜21具有相互连接的第三部分211和第四部分212；第四部分212连接于第三部分211，第三部分211包覆第三侧壁13以及未设有防爆阀3的一个第一侧壁11，第四部分212至少部分包覆壁面110；在设有防爆阀3的第一侧壁11上，第四部分212与第二绝缘膜22重叠，并在第三方向03上的两侧各形成一重叠区5。上述设计使得第一绝缘膜21和第二绝缘膜22实现对壳体1的良好且完整的保护，提升对于电芯的包膜保护效果及可靠度。As shown in FIGS. 1 to 3 , in some embodiments of the present application, the first insulating film 21 has a third portion 211 and a fourth portion 212 connected to each other; the fourth portion 212 is connected to the third portion 211, the third portion 211 covers the third side wall 13 and a first side wall 11 without an explosion-proof valve 3, and the fourth portion 212 at least partially covers the wall surface 110; on the first side wall 11 with the explosion-proof valve 3, the fourth portion 212 overlaps with the second insulating film 22, and forms an overlapping area 5 on both sides in the third direction 03. The above design enables the first insulating film 21 and the second insulating film 22 to achieve good and complete protection of the housing 1, and improves the coating protection effect and reliability of the battery cell.
具体的，如图3所示，本申请的一些实施例中，在第三方向03上，壳体1的尺寸为A，重叠区5的尺寸为B，防爆阀3的尺寸为C，并且有B≤(A-C)/2， 以使各个分体式设计的绝缘膜2可对壳体1实现更完整的包膜保护效果，并且不会发生由尺寸匹配不佳而堆积产生褶皱等外观不佳的问题。Specifically, as shown in FIG3 , in some embodiments of the present application, in the third direction 03 , the size of the housing 1 is A, the size of the overlapping area 5 is B, the size of the explosion-proof valve 3 is C, and B≤(AC)/2, Therefore, each of the split-type insulating films 2 can achieve a more complete encapsulation protection effect on the shell 1, and will not cause wrinkles and other poor appearance problems due to poor size matching.
如图1所示，本申请的一些实施例中，防爆阀3与两个第二侧壁12之间的距离均大于0；例如，防爆阀3可以设置在第二方向02上第一侧壁11的中心位置，第二绝缘膜22包括两个，两个第二绝缘膜22分别设于防爆阀3在第二方向02上的两侧。上述设计的防爆阀3以及具有该种防爆阀3的电芯可以适配的更多具有特殊要求的设计方案，且上述的两个第二绝缘膜22可对该种电芯的壳体1提供可靠保护，以提升该种电芯的安全性。As shown in FIG. 1 , in some embodiments of the present application, the distance between the explosion-proof valve 3 and the two second side walls 12 is greater than 0; for example, the explosion-proof valve 3 can be arranged at the center of the first side wall 11 in the second direction 02, and the second insulating film 22 includes two, and the two second insulating films 22 are respectively arranged on both sides of the explosion-proof valve 3 in the second direction 02. The explosion-proof valve 3 designed as above and the battery cell having the explosion-proof valve 3 can be adapted to more design solutions with special requirements, and the two second insulating films 22 can provide reliable protection for the shell 1 of the battery cell to improve the safety of the battery cell.
如图1所示，本申请的一些实施例中，第一绝缘膜21和第二绝缘膜22还包覆部分第二侧壁12；极柱4相对于绝缘膜2露出。可以理解的是，第一绝缘膜21和第二绝缘膜22各自延伸出一部分以覆盖并保护设有极柱4的第二侧壁12，以进一步增强对于电芯的保护程度，从而进一步增强电芯的安全性。As shown in FIG1 , in some embodiments of the present application, the first insulating film 21 and the second insulating film 22 further cover a portion of the second side wall 12; the pole 4 is exposed relative to the insulating film 2. It can be understood that the first insulating film 21 and the second insulating film 22 each extend a portion to cover and protect the second side wall 12 provided with the pole 4, so as to further enhance the degree of protection for the battery cell, thereby further enhancing the safety of the battery cell.
如图1所示，本申请的一些实施例中，第二绝缘膜22具有相互连接的第一部分221和第二部分222；第二绝缘膜22的第一部分221包覆于壁面110上，第二绝缘膜22的第二部分222包覆于第二侧壁12上。可以理解的是，第二绝缘膜2的第一部分221对设有防爆阀3的第一侧壁11提供保护，第二绝缘膜2的第二部分222对设有极柱4的第二侧壁12提供保护。As shown in FIG1 , in some embodiments of the present application, the second insulating film 22 has a first portion 221 and a second portion 222 connected to each other; the first portion 221 of the second insulating film 22 is coated on the wall surface 110, and the second portion 222 of the second insulating film 22 is coated on the second side wall 12. It can be understood that the first portion 221 of the second insulating film 2 provides protection for the first side wall 11 provided with the explosion-proof valve 3, and the second portion 222 of the second insulating film 2 provides protection for the second side wall 12 provided with the pole 4.
如图1所示，本申请的一些实施例中，第一绝缘膜21还具有沿第二方向02延伸出的第五部分213，第五部分213包覆部分的第二侧壁12，以使得绝缘膜2对于电芯的壳体1的包覆更全面，进一步提升对电芯的绝缘保护效果。As shown in Figure 1, in some embodiments of the present application, the first insulating film 21 also has a fifth portion 213 extending along the second direction 02, and the fifth portion 213 covers part of the second side wall 12, so that the insulating film 2 covers the shell 1 of the battery cell more comprehensively, further improving the insulation protection effect of the battery cell.
本申请的一些实施例中，如图1所示，第一部分221与第二部分222相互连接，优选地第一部分221和第二部分222可以设置为相互垂直，以适配相互垂直的第一侧壁11和第二侧壁12，使得第二绝缘膜22与壳体1的外形相互适配，便于加工过程中的防呆，提升了产能，从而使得电芯获得更好的包膜保护效果。In some embodiments of the present application, as shown in Figure 1, the first part 221 and the second part 222 are connected to each other. Preferably, the first part 221 and the second part 222 can be set to be perpendicular to each other to adapt to the first side wall 11 and the second side wall 12 that are perpendicular to each other, so that the second insulating film 22 and the outer shape of the shell 1 are adapted to each other, which is convenient for fool-proofing during processing and improves production capacity, so that the battery cell obtains better coating protection effect.
本申请的一些实施例中，电芯还包括第三绝缘膜(未示出)；第三绝缘膜包覆于部分第二侧壁12上，并且极柱4相对于第三绝缘膜露出；上述的第三绝缘膜可为第二侧壁12提供包膜保护效果。具体的，第三绝缘膜可以与上述的第二绝缘膜22的第二部分222相互重叠，以进一步增强对于第二侧壁12 的包膜保护效果。In some embodiments of the present application, the battery cell further includes a third insulating film (not shown); the third insulating film is coated on a portion of the second side wall 12, and the pole 4 is exposed relative to the third insulating film; the third insulating film can provide a coating protection effect for the second side wall 12. Specifically, the third insulating film can overlap with the second portion 222 of the second insulating film 22 to further enhance the protection of the second side wall 12. The protective effect of the coating.
如图4和图5所示，本申请的一些实施例，绝缘膜2包括第一绝缘膜21和第二绝缘膜22；第一绝缘膜21和第二绝缘膜22上各设有一缺口23，缺口23的形状和位置与防爆阀3的形状和位置为相对应；第一绝缘膜21和第二绝缘膜22分别夹设于壳体1在第三方向03上的两侧并且各包覆一第三侧壁13，第一绝缘膜21和第二绝缘膜22均包覆壁面110以及部分第二侧壁12；位于第一绝缘膜21上的缺口23与位于第二绝缘膜22上的缺口23彼此朝向相对并围合形成避让孔6，防爆阀3穿过避让孔6。如图4和图5所示，该避让孔6是由两块独立、分体式设计的第一绝缘膜21和第二绝缘膜22围合而形成的，有别于在一整块绝缘膜2上挖出开孔的技术方案。可以理解的是，上述的夹合式设计的两个绝缘膜2可以在壳体1的两侧将壳体1夹合并形成包膜保护，并且，解决了包膜方案中“给包膜挖孔”而导致的褶皱、气泡等外观不佳的问题，也解决了挖孔导致的材料浪费的问题。As shown in Fig. 4 and Fig. 5, in some embodiments of the present application, the insulating film 2 includes a first insulating film 21 and a second insulating film 22; a notch 23 is provided on each of the first insulating film 21 and the second insulating film 22, and the shape and position of the notch 23 correspond to the shape and position of the explosion-proof valve 3; the first insulating film 21 and the second insulating film 22 are respectively sandwiched on both sides of the shell 1 in the third direction 03 and each covers a third side wall 13, and the first insulating film 21 and the second insulating film 22 both cover the wall surface 110 and part of the second side wall 12; the notch 23 on the first insulating film 21 and the notch 23 on the second insulating film 22 face each other and enclose to form an avoidance hole 6, and the explosion-proof valve 3 passes through the avoidance hole 6. As shown in Fig. 4 and Fig. 5, the avoidance hole 6 is formed by enclosing two independent, split-designed first insulating films 21 and second insulating films 22, which is different from the technical solution of digging an opening on a whole insulating film 2. It can be understood that the two insulating films 2 of the above-mentioned clamping design can clamp the shell 1 on both sides of the shell 1 to form a protective envelope, and solve the problem of poor appearance such as wrinkles and bubbles caused by "digging holes in the envelope" in the envelope solution, and also solve the problem of material waste caused by digging holes.
如图4所示，本申请的一些实施例中，在两个第一侧壁11和两个第二侧壁12上，第一绝缘膜21和第二绝缘膜22相互重叠，以对壳体1形成更可靠的包膜保护，从而提高电芯的安全性。具体的，如图4所示，在第一侧壁11上第一绝缘膜21和第二绝缘膜22相互重叠并形成重叠区5；进一步地，在第二侧壁12上第一绝缘膜21和第二绝缘膜22相互重叠并形成另一重叠部分(未标号)，以实现对于电芯壳体1的更完善的绝缘包膜保护效果。As shown in FIG4 , in some embodiments of the present application, on the two first side walls 11 and the two second side walls 12 , the first insulating film 21 and the second insulating film 22 overlap each other to form a more reliable film protection for the housing 1 , thereby improving the safety of the battery cell. Specifically, as shown in FIG4 , on the first side wall 11 , the first insulating film 21 and the second insulating film 22 overlap each other to form an overlapping area 5 ; further, on the second side wall 12 , the first insulating film 21 and the second insulating film 22 overlap each other to form another overlapping portion (not numbered) to achieve a more complete insulating film protection effect for the battery cell housing 1 .
可以理解的是，上述的电芯及其所采用的绝缘膜均容易成型以及组装加工，在保证产品质量的同时简化了生产工序，进而提高产能效益。It is understandable that the above-mentioned battery cells and the insulating films used therein are easy to form and assemble, which simplifies the production process while ensuring product quality, thereby improving production efficiency.
实施例2Example 2
本申请的实施例还提供了一种用电设备，该用电设备包括如实施例1中的电芯，具体可以是电动汽车。The embodiments of the present application further provide an electrical device, which includes a battery cell as in Embodiment 1, and may specifically be an electric car.
以上对本申请实施例所提供的电芯及用电设备进行了详细介绍，本申请中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质 脱离本申请各实施例的技术方案的范围。 The battery cells and electrical equipment provided in the embodiments of the present application are introduced in detail above. The principles and implementation methods of the present application are explained by using specific examples in the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not affect the essence of the corresponding technical solutions. It deviates from the scope of the technical solutions of the embodiments of the present application.

Claims (14)

  1. 一种电芯，所述电芯具有两两相互垂直的第一方向(01)、第二方向(02)和第三方向(03)，所述电芯包括：A battery cell, the battery cell having a first direction (01), a second direction (02) and a third direction (03) which are mutually perpendicular in pairs, and the battery cell comprises:
    壳体(1)，在第一方向(01)上具有相对的两个第一侧壁(11)，在第二方向(02)上具有相对的两个第二侧壁(12)，在第三方向(03)上具有相对的两个第三侧壁(13)；以及A housing (1) having two first side walls (11) opposite to each other in a first direction (01), two second side walls (12) opposite to each other in a second direction (02), and two third side walls (13) opposite to each other in a third direction (03); and
    多个绝缘膜(2)，设于所述第一侧壁(11)和第三侧壁(13)上；A plurality of insulating films (2) are arranged on the first side wall (11) and the third side wall (13);
    其中，一个所述第一侧壁(11)上设有防爆阀(3)以及壁面(110)，所述绝缘膜(2)设于至少部分的所述壁面(110)上，两个所述第二侧壁(12)上均设有极柱(4)。An explosion-proof valve (3) and a wall surface (110) are provided on one of the first side walls (11), the insulating film (2) is provided on at least a portion of the wall surface (110), and poles (4) are provided on both of the two second side walls (12).
  2. 根据权利要求1所述的电芯，其中，所述绝缘膜(2)包括第一绝缘膜(21)和第二绝缘膜(22)；The battery cell according to claim 1, wherein the insulating film (2) comprises a first insulating film (21) and a second insulating film (22);
    所述第一绝缘膜(21)包覆所述第三侧壁(13)以及未设有所述防爆阀(3)的一个所述第一侧壁(11)；The first insulating film (21) covers the third side wall (13) and one of the first side walls (11) not provided with the explosion-proof valve (3);
    所述第二绝缘膜(22)包覆所述壁面(110)。The second insulating film (22) covers the wall surface (110).
  3. 根据权利要求2所述的电芯，其中，所述第一绝缘膜(21)具有相互连接的第三部分(211)和第四部分(212)；The battery cell according to claim 2, wherein the first insulating film (21) has a third portion (211) and a fourth portion (212) connected to each other;
    所述第三部分(211)包覆所述第三侧壁(13)以及未设有所述防爆阀(3)的一个所述第一侧壁(11)，所述第四部分(212)至少部分包覆所述壁面(110)；The third part (211) covers the third side wall (13) and one of the first side walls (11) not provided with the explosion-proof valve (3), and the fourth part (212) at least partially covers the wall surface (110);
    在设有所述防爆阀(3)的所述第一侧壁(11)上，所述第四部分(212)与所述第二绝缘膜(22)重叠，并在所述第三方向(03)上的两侧各形成一重叠区(5)。On the first side wall (11) provided with the explosion-proof valve (3), the fourth portion (212) overlaps with the second insulating film (22), and forms an overlapping area (5) on both sides in the third direction (03).
  4. 根据权利要求3所述的电芯，其中，在所述第三方向(03)上，所述壳体(1)的尺寸为A，所述重叠区(5)的尺寸为B，所述防爆阀(3)的尺寸为C，满足：B≤(A-C)/2。The battery cell according to claim 3, wherein, in the third direction (03), the size of the shell (1) is A, the size of the overlapping area (5) is B, and the size of the explosion-proof valve (3) is C, satisfying: B≤(A-C)/2.
  5. 根据权利要求3所述的电芯，其中，所述防爆阀(3)与两个所述第二侧壁(12)之间的距离均大于0；The battery cell according to claim 3, wherein the distance between the explosion-proof valve (3) and the two second side walls (12) is greater than 0;
    所述第二绝缘膜(22)包括两个，两个所述第二绝缘膜(22)分别设于所述防爆阀(3)在所述第二方向(02)上的两侧。 The second insulating films (22) include two second insulating films (22), which are respectively arranged on two sides of the explosion-proof valve (3) in the second direction (02).
  6. 根据权利要求2所述的电芯，其中，所述第一绝缘膜(21)和第二绝缘膜(22)还包覆部分所述第二侧壁(12)；The battery cell according to claim 2, wherein the first insulating film (21) and the second insulating film (22) further cover a portion of the second side wall (12);
    所述极柱(4)相对于所述绝缘膜(2)露出。The pole (4) is exposed relative to the insulating film (2).
  7. 根据权利要求6所述的电芯，其中，所述第二绝缘膜(22)具有相互连接的第一部分(221)和第二部分(222)；The battery cell according to claim 6, wherein the second insulating film (22) has a first portion (221) and a second portion (222) connected to each other;
    所述第二绝缘膜(22)的第一部分(221)包覆于设有所述防爆阀(3)的所述第一侧壁(11)上，所述第二绝缘膜(22)的第二部分(222)包覆于所述第二侧壁(12)上。The first part (221) of the second insulating film (22) is coated on the first side wall (11) provided with the explosion-proof valve (3), and the second part (222) of the second insulating film (22) is coated on the second side wall (12).
  8. 根据权利要求7所述的电芯，其中，所述第一部分(221)与所述第二部分(222)相互垂直。The battery cell according to claim 7, wherein the first portion (221) and the second portion (222) are perpendicular to each other.
  9. 根据权利要求6所述的电芯，其中，所述第一绝缘膜(21)还具有沿所述第二方向(02)延伸出的第五部分(213)，所述第五部分(213)包覆部分的所述第二侧壁(12)。The battery cell according to claim 6, wherein the first insulating film (21) further has a fifth portion (213) extending along the second direction (02), and the fifth portion (213) covers part of the second side wall (12).
  10. 根据权利要求2至9中任一项所述的电芯，其特征在于，所述电芯还包括第三绝缘膜；The battery cell according to any one of claims 2 to 9, characterized in that the battery cell further comprises a third insulating film;
    所述第三绝缘膜包覆于部分所述第二侧壁(12)上，并且所述极柱(4)相对于所述第三绝缘膜露出。The third insulating film covers a portion of the second side wall (12), and the pole (4) is exposed relative to the third insulating film.
  11. 根据权利要求1所述的电芯，其中，所述绝缘膜(2)包括第一绝缘膜(21)和第二绝缘膜(22)；The battery cell according to claim 1, wherein the insulating film (2) comprises a first insulating film (21) and a second insulating film (22);
    所述第一绝缘膜(21)和第二绝缘膜(22)上各设有一缺口(23)，所述缺口(23)的形状和位置与防爆阀(3)的形状和位置为相对应；The first insulating film (21) and the second insulating film (22) are each provided with a notch (23), and the shape and position of the notch (23) correspond to the shape and position of the explosion-proof valve (3);
    所述第一绝缘膜(21)和第二绝缘膜(22)分别设于所述壳体(1)在所述第三方向(03)上的两侧，并且各包覆一所述第三侧壁(13)，所述第一绝缘膜(21)和第二绝缘膜(22)均包覆所述壁面(110)以及部分所述第二侧壁(12)；The first insulating film (21) and the second insulating film (22) are respectively arranged on both sides of the shell (1) in the third direction (03), and each covers one of the third side walls (13); the first insulating film (21) and the second insulating film (22) both cover the wall surface (110) and a portion of the second side wall (12);
    位于所述第一绝缘膜(21)上的所述缺口(23)与位于所述第二绝缘膜(22)上的所述缺口(23)彼此朝向相对并围合形成避让孔(6)，所述防爆阀(3)穿过所述避让孔(6)。The notch (23) located on the first insulating film (21) and the notch (23) located on the second insulating film (22) face each other and enclose a avoidance hole (6), and the explosion-proof valve (3) passes through the avoidance hole (6).
  12. 根据权利要求11所述的电芯，其中，在两个所述第一侧壁(11)上， 所述第一绝缘膜(21)和第二绝缘膜(22)相互重叠。The battery cell according to claim 11, wherein on the two first side walls (11), The first insulating film (21) and the second insulating film (22) overlap each other.
  13. 根据权利要求11所述的电芯，其中，在两个所述第二侧壁(12)上，所述第一绝缘膜(21)和第二绝缘膜(22)相互重叠。The battery cell according to claim 11, wherein, on the two second side walls (12), the first insulating film (21) and the second insulating film (22) overlap each other.
  14. 一种用电设备，所述用电设备包括如权利要求1至13中任一项所述的电芯。 An electrical device, comprising the battery cell according to any one of claims 1 to 13.
PCT/CN2023/115633 2022-11-08 2023-08-30 Battery cell and electric device WO2024098898A1 (en)

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