CN214625183U

CN214625183U - Full-sealed battery shell structure capable of resisting high temperature and charging and discharging with large current

Info

Publication number: CN214625183U
Application number: CN202120591148.2U
Authority: CN
Inventors: 司健; 江艺
Original assignee: Shanghai Yisen Power Technology Co ltd
Current assignee: Shanghai Yisen Power Technology Co ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-11-05
Anticipated expiration: 2031-03-23

Abstract

The utility model discloses a but not only high temperature resistant but also full-sealed battery's of heavy current charge-discharge shell structure, its characterized in that: including shell and end block, the end block is established at the tip of shell and is formed sealed whole with the shell, the end block includes sealed lid and establishes the positive negative terminal on sealed lid, sealed lid is passed to positive negative terminal one end, and the other end is connected with the book core electrode of establishing in the shell, keeps apart fixedly through insulating material between positive negative terminal and the sealed lid. The shell is a cylindrical shell but is not limited to a cylindrical shape, and the cap and the shell are connected into a fully sealed whole by welding. The structure can not only meet the requirements of large-current charging and discharging of the battery, but also be used in a high-temperature environment, and has strong applicability and high safety.

Description

Full-sealed battery shell structure capable of resisting high temperature and charging and discharging with large current

Technical Field

The utility model relates to a not only high temperature resistant but also totally enclosed battery shell structure that heavy current charge-discharge specifically is battery appearance structure, belongs to battery design technical field.

Background

Batteries play an increasingly important role in life, and are now widely used in various fields such as mobile phones, electric bicycles, automobiles, energy storage power systems, military weapons, and the like. Aiming at the use of batteries in different environments, the development of different types of batteries is very important, and the use performance, safety, service life and cost of the batteries can be directly influenced by different use environments.

In some special fields, such as oil drilling, aerospace, military and the like, batteries are required to be capable of bearing high temperature of more than 150 ℃ and carrying out large-current charging and discharging. In view of these special requirements, it is important to develop a battery with a fully sealed structure that is both resistant to high temperature and capable of charging and discharging with large current, and the battery case is the key device to be solved first. At present, the number of battery shells capable of meeting the requirement of high temperature resistance in the market is small, wherein a D-type primary battery full-sealing structure is one of the battery shells, but the D-type primary battery full-sealing structure cannot meet the requirement of large-current charging and discharging; the common secondary lithium battery shell can meet the use conditions of large-current charging and discharging, but because the sealing of the shell structural part mainly depends on the compression sealing between metal and a plastic sealing ring, the plastic sealing ring is easy to soften and causes sealing failure in a high-temperature environment.

Disclosure of Invention

The utility model discloses the purpose is: the casing structure of the fully sealed battery which is high temperature resistant and can be charged and discharged with large current is provided, so that the battery can still have the capacity of charging and discharging with large current in a high-temperature environment of more than 180 ℃, can normally work on the premise of ensuring the safety and has enough service life.

In order to achieve the above object, the technical scheme of the utility model is to provide a but the totally enclosed battery's of high temperature resistant and heavy current charge-discharge shell structure, its characterized in that: including shell and end block, the end block is established at the tip of shell and is formed sealed whole with the shell, the end block includes sealed lid and establishes the positive negative terminal on sealed lid, sealed lid is passed to positive negative terminal one end, and the other end is connected with the book core electrode of establishing in the shell, keeps apart fixedly through insulating material between positive negative terminal and the sealed lid.

Preferably, the shell is a metal piece with an opening at one end, and the end cap is arranged at the opening end of the shell to form a sealing structure with the shell.

Preferably, the shell is a metal piece with openings at two ends, and the end caps are arranged at two ends of the shell to form a sealing structure with the shell.

Preferably, the outer side wall of the end cap is connected with the inner side wall of the shell to form a sealed whole.

Preferably, the sealing cover is a panel which is in nested fit with the inner side wall of the housing.

Preferably, the positive and negative terminals are rigid current-carrying conductors.

Preferably, the housing is cylindrical.

Preferably, the shell and the end cap are connected by welding.

Preferably, the material of the positive and negative terminals is nickel, copper, stainless steel or aluminum.

Preferably, positive negative pole terminal compares with prior art for column, slice or structure of buckling with the one end of rolling up core electrode connection, the beneficial effects of the utility model are that:

1. the battery shell has a simple structure and is suitable for all battery shell structures.

2. The battery structure with the structure can meet the requirements of all use environments and currents, and is high in applicability.

3. And by adopting a full-sealing structure, the interior of the battery can bear higher pressure, and the safety of the battery is higher.

Drawings

FIG. 1 is a schematic view of the cylindrical housing of the present invention

FIG. 2 is a sectional view of the cap of the present invention, in which the battery internal terminal is a sheet structure

FIG. 3 is a sectional view of the cap with a sheet-shaped bending structure for the battery internal terminal

FIG. 4 is a sectional view of the cap of the battery with the terminal of the flat round end plate structure

Fig. 5 is a cut-away view of the battery case of the present invention, in which the internal terminals are adopted at the two ends as the planar circular end plate structure.

1-positive and negative terminals; 2-an insulating material; 3-sealing the cover; 4-a cylindrical battery shell; 5-rolling a groove; 6-winding core pole ear; 7-a jellyroll electrode; 8-seal the welding position.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1 and 2, the utility model relates to a but not only high temperature resistant but also high current charge-discharge's totally enclosed battery's shell structure includes shell 4 and end block, and shell 4 is one end open-ended metalwork, and the shape uses cylindric casing as leading but not restricted to cylindrically, and the material is one kind or the alloy in materials such as stainless steel, aluminium or nickel, and shell 4 lateral wall is provided with the rolling groove 5 along the circumference round. The end cap is arranged at the opening end of the shell 4, the outer side wall of the end cap and the inner side wall of the shell 4 are connected into a fully-sealed whole through welding, and the welding is one or more of laser welding and argon arc welding. The structure can not only meet the heavy current discharge of the battery, but also be a shell of the battery which can be used in a high-temperature environment. The maximum multiplying power of the large current can be more than 100C, and the high-temperature environment is more than 180 ℃.

The end cap consists of a sealing cover 3 and positive and negative terminals 1 which vertically penetrate through and are fixed on the sealing cover 3 and have strong overcurrent capacity, one end of each positive and negative terminal 1 penetrates through the sealing cover 3, the other end of each positive and negative terminal is connected with a roll core electrode 7 arranged in the shell 4, and the positive and negative terminals 1 and the sealing cover 3 are isolated and fixed through insulating materials 2.

The positive and negative terminals 1 are current-carrying conductors having a sufficient cross-sectional area and rigidity for conducting current, and the rigidity is a strength requirement for a process having a certain pressure such as welding used for connection with a winding core and external power supply. The positive and negative terminals 1 for internal and external welding connection can be in the shape of column, sheet or other shapes easy to weld, or in the structure easy to bend and shape after welding connection, and the material is nickel, copper, stainless steel, aluminum and other metals. The current-carrying conductor penetrates through the sealing cover 3, in the complete battery, the current-carrying conductor outside the battery is used for external power supply connection, the current-carrying conductor inside the battery is connected with a winding core tab 6 of a winding core electrode 7, and the connection mode is one or more of ultrasonic welding, laser welding or resistance welding.

The insulating material 2 is mainly used for isolating the conduction between the positive and negative terminals 1 and the sealing cover 3 and fixing the positive and negative terminals 1. The insulating material 2 may be one or more of glass ceramic, teflon, polyimide, etc.

The sealing cover 3 is a circular or other end panel which is used for fixing the positive and negative terminals and is nested with the inner side wall of the shell 4, wherein the circular or other end panel has enough strength, and the nesting means that the sealing cover can be in close contact with the structure of the open end surface of the shell, so that the sealing cover is convenient to weld and seal. The material of the sealing cover 3 is one of stainless steel, aluminum or nickel.

Positive negative pole terminal 1 is the column in battery exterior structure in this embodiment, and inner structure is the slice, and for an organic whole, rolls up and buckles after core lug 6 welds on the slice terminal, becomes the structure of fig. 3, then assembles end block and columniform shell 4, and the welding negative pole of point end adopts argon arc welding to seal after annotating the liquid. The positive and negative terminals 1 are formed by punching stainless steel materials, the insulating materials 2 are glass ceramics, the positive and negative terminals 1 are fixed and isolated from the sealing cover 3, and the shell 4 is made of stainless steel materials.

Example two

The structure shown in fig. 4 is a cap structure of the battery case in the second embodiment. Positive negative terminal 1 is the column at battery exterior structure, and inner structure is plane end plate, and positive negative terminal 1 is a whole, rolls up core utmost point ear 6 lug beading on the end plate, adopts laser welding to seal, then assembles end block and columniform shell 4, and the welding negative pole of point end adopts laser welding to seal after annotating the liquid. The positive and negative terminals 1 are formed by die-casting an aluminum material, the insulating material 2 is glass ceramic, the positive and negative terminals 1 are fixed and isolated from the sealing cover 3, the insulating material 2 is a high-temperature-resistant polytetrafluoroethylene material, the positive and negative terminals 1 are isolated from the sealing cover 3, and the shell 4 is made of a stainless steel material.

EXAMPLE III

The structure shown in fig. 5 is the battery case structure in the third embodiment, and the two ends of the case 4 adopt a planar circular end plate structure with internal terminals. This positive negative terminal 1 is the column in battery exterior structure, inside round end plate structure, it is a whole, during the assembly, roll up core utmost point ear 6 lug beading on the round end plate of one end block, then adopt laser welding to seal, then assemble end block and columniform shell 4, adopt laser welding to roll up the other end of core utmost point ear 6 with other end block again, adopt laser welding to seal after annotating the liquid (also can open the aperture on sealed lid 3, laser welding seals earlier, then annotates the liquid, the reuse is pressed the steel pearl and is sealed). The positive terminal is formed by die casting an aluminum material, the negative terminal at the other end is formed by processing a copper material machine, the cap insulating materials 2 at the two ends are glass ceramics, the positive terminal and the negative terminal 1 are fixed and isolated from the sealing cover 3, and the shell 4 is made of an aluminum material.

Claims

1. The utility model provides a but shell structure of totally enclosed battery of high temperature resistant and heavy current charge-discharge which characterized in that: including shell (4) and end block, the end block is established at the tip of shell (4) and is formed sealed whole with shell (4), the end block includes sealed lid (3) and establishes positive negative terminal (1) on sealed lid (3), sealed lid (3) is passed to positive negative terminal (1) one end, and the other end is connected with roll core electrode (7) of establishing in shell (4), keeps apart fixedly through insulating material (2) between positive negative terminal (1) and the sealed lid (3).

2. The casing structure of a totally enclosed battery, which is resistant to high temperature and can be charged and discharged with large current, according to claim 1, wherein: the shell (4) is a metal piece with an opening at one end, and the end cap is arranged at the opening end of the shell (4) to form a sealing structure with the shell (4).

3. The casing structure of a totally enclosed battery, which is resistant to high temperature and can be charged and discharged with large current, according to claim 1, wherein: the shell (4) is a metal piece with openings at two ends, and the end caps are arranged at two ends of the shell (4) to form a sealing structure with the shell (4).

4. A casing structure of a fully sealed battery which is resistant to high temperature and can be charged and discharged with large current according to claim 2 or 3, wherein: the outer side wall of the end cap is connected with the inner side wall of the shell (4) to form a sealed whole.

5. The casing structure of a totally enclosed battery, which is resistant to high temperature and can be charged and discharged with large current, according to claim 4, wherein: the sealing cover (3) is a panel which is in nested fit with the inner side wall of the shell (4).

6. The casing structure of a totally enclosed battery, which is resistant to high temperature and can be charged and discharged with large current, according to claim 4, wherein: the positive and negative terminals (1) are rigid current-carrying conductors.

7. The casing structure of a totally enclosed battery, which is resistant to high temperature and can be charged and discharged with large current, according to claim 4, wherein: the housing (4) is cylindrical.

8. The casing structure of a totally enclosed battery, which is resistant to high temperature and can be charged and discharged with large current, according to claim 4, wherein: the shell (4) and the end cap are connected in a welding mode.

9. The casing structure of a totally enclosed battery, which is resistant to high temperature and can be charged and discharged with large current, according to claim 4, wherein: the positive and negative terminals (1) are made of nickel, copper, stainless steel or aluminum.

10. The casing structure of a totally enclosed battery, which is resistant to high temperature and can be charged and discharged with large current, according to claim 4, wherein: the end of the positive and negative terminals (1) connected with the roll core electrode (7) is in a columnar, flaky or bent structure.