CN216872216U

CN216872216U - Insulation system of cylinder battery and cylinder battery of applied insulation system

Info

Publication number: CN216872216U
Application number: CN202123275485.XU
Authority: CN
Inventors: 刘淼; 付阳锋; 周富华
Original assignee: Hunan Times United New Energy Co ltd
Current assignee: Hunan Times United New Energy Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-07-01
Anticipated expiration: 2031-12-23

Abstract

The utility model provides an insulating structure of a cylindrical battery, which relates to the field of battery accessories and comprises a body, the body is cylindrical, the upper end surface of the body is provided with a central hole, the lower end surface of the body is provided with an upwardly concave cavity, the cavity comprises a first column cavity and a second column cavity, the second column cavity is positioned at the upper end of the first column cavity, the diameter of the first column cavity is larger than that of the second column cavity, the diameter of the second column cavity is larger than that of the central hole, the insulating structure of the cylindrical battery is integrally manufactured, the bulge formed by the first column cavity and the body is attached to the side wall of the naked battery core, the negative electrode end face and the side face of the battery are well protected, the problem that the insulation resistance of the battery is reduced and even short circuit is caused can be avoided, and in addition, the integrally-made insulation structure is convenient for injection molding.

Description

Insulation structure of cylindrical battery and cylindrical battery applying insulation structure

Technical Field

The utility model relates to the field of battery accessories, in particular to an insulation structure of a cylindrical battery and the cylindrical battery applying the insulation structure.

Background

At present, the lithium battery is more and more widely used in various digital devices such as a notebook computer, a digital camera, a digital video camera and the like, and has a wide prospect in automobiles, mobile base stations, energy storage power stations and the like. In this case, the use of batteries no longer occurs alone, as in cell phones, but more in the form of series or parallel battery packs. The capacity and life of a battery pack are related not only to each individual cell, but also to the consistency between each cell. Poor consistency can greatly compromise the performance of the battery pack.

The consistency of self-discharge is an important part of the influence factor, and the battery with inconsistent self-discharge has a large difference in SOC after being stored for a period of time, and the capacity and safety of the battery are greatly influenced.

Due to poor insulation of a cylindrical battery sealing ring or a gasket or insufficient resistance between the cylindrical battery sealing ring or the gasket and an external aluminum shell (external conductor and humidity), or exposure of part of a fluid collecting material (copper aluminum foil) caused by separation and insulation of a plastic piece, the insulation resistance of the battery is low, and even short circuit of the battery is caused.

Generally, the cell insulation adopts a plurality of parts to be combined for insulation purpose or the insulation parts are a plurality of open openings, which easily causes the contact between the pole ear and the shell.

SUMMERY OF THE UTILITY MODEL

The utility model provides an insulation structure of a cylindrical battery, and aims to solve the problem that in the prior art, insulation is easy to self-discharge or short-circuit by adopting a mode of assembling a plurality of parts.

In order to achieve the above object, an embodiment of the present invention provides an insulation structure of a cylindrical battery, including:

the novel multifunctional pen container comprises a body, the body is cylindricly, the up end of body is provided with the centre bore, the lower terminal surface of body is provided with the cavity of upwards caving in, the cavity includes first post chamber and second post chamber, the second post chamber is located the upper end in first post chamber, the diameter in first post chamber is greater than the diameter in second post chamber, the diameter in second post chamber is greater than the diameter in centre bore.

Preferably, the body is made of PP material.

The application also provides an use insulation system's cylinder battery, includes: the aforementioned insulating structure, and

naked electric core, the welding of the negative pole terminal surface of naked electric core has the negative pole mass flow body, the negative pole mass flow body includes the panel of being connected with the negative pole terminal surface and sets up the screw rod at panel center, the cover is equipped with O type circle on the screw rod, insulation system's centre bore cover is established just first post chamber is attached on the screw rod the lateral wall of naked electric core, the last aluminum hull that is provided with of insulation system, the aluminum hull is provided with the hole of wearing that supplies the screw rod to wear out, be provided with the nut on the screw rod, the nut compresses tightly aluminum hull and insulation system the negative pole terminal surface.

Preferably, an insulating sleeve is further arranged between the nut and the aluminum shell, the insulating sleeve is arranged on the screw rod, and the nut is pressed against the insulating sleeve.

Preferably, the O-ring is disposed at a bottom end of the screw.

The scheme of the utility model has the following beneficial effects:

the application provides an insulation system of cylinder battery adopts an organic whole to make to the bellying through first post chamber and body formation is attached on the lateral wall of naked electric core, has good protection to negative pole terminal surface, the side of battery, can avoid the insulating resistance of battery to reduce, causes the problem of short circuit even, and in addition, the insulation system of integrative making still is convenient for injection moulding.

Drawings

Fig. 1 is a first perspective view of an insulating structure of a cylindrical battery;

fig. 2 is a second perspective view of the insulating structure of the cylindrical battery;

fig. 3 is a sectional view of a cylindrical battery to which an insulating structure is applied.

[ instruction of reference ]

1-body, 2-center hole, 3-boss, 4-naked electric core, 5-negative current collector, 6-O-shaped ring, 7-aluminum shell, 8-insulating sleeve and 9-nut.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-2, an embodiment of the present invention provides an insulation structure of a cylindrical battery, including: the body 1, body 1 are made by the PP material, and the up end centre of a circle department of body 1 is provided with centre bore 2, and centre bore 2 runs through body 1. The lower terminal surface of body 1 is provided with the cavity of upwards sunken, and the cavity includes first post chamber and second post chamber, and wherein the second post chamber is located the upper end in first post chamber, and the diameter in first post chamber is greater than the diameter in second post chamber, and the diameter in second post chamber is greater than the diameter of centre bore 2, and centre bore 2, first post chamber and second post chamber set up with the axle center. The second column cavity and the first column cavity are formed in a stepped structure in the cavity of the body 1.

The first cylindrical cavity and the side of the body 1 form a boss 3.

The insulating structure of the cylindrical battery provided by the utility model has a good protection effect on the end face of the negative electrode because of being integrally manufactured, and can avoid the problems of reduction of the insulating resistance value of the battery and even short circuit.

As shown in fig. 3, this application still provides an use insulation system's cylinder battery, including aforementioned insulation system and naked electric core 4, wherein be provided with the negative pole mass flow body at the negative pole terminal surface of naked electric core 4, the negative pole mass flow body includes the panel and sets up the screw rod at the panel center. The panel is welded with the end face of the negative pole, and the screw rod and the panel are integrally manufactured. The cover is equipped with O type circle 6 on the screw rod, and O type circle 6 sets up in the bottom of screw rod, and aforementioned insulation system's centre bore 2 supplies the screw rod to pass to guarantee that bellying 3 can be attached on the lateral wall of naked electric core 4, insulation system's top is provided with aluminum hull 7, is provided with on the aluminum hull 7 and wears out the hole and supply the screw rod to wear out. Still be provided with insulating cover 8 on the screw rod, insulating cover 8 sets up in the top of aluminium shell 7, still is provided with nut 9 on the screw rod, and nut 9 will compress tightly on the panel of the negative current collector 5 from top to bottom insulating cover 8, aluminium shell 7, insulation system, O type circle 6, prevents that insulating cover 8, aluminium shell 7, insulation system and O type circle 6 from taking place to rotate.

The cylindrical battery with the insulation structure disclosed in the application has the advantages that the insulation structure reduces the risk that the self-discharge is large or short circuit is caused due to the fact that the tab leakage part and the shell are contacted together due to the assembly of a plurality of split parts because of the gap problem, and the protruding part 3 and the step structure have the effect of stabilizing the bare cell 4. Secondly, the stair structure makes O type circle 6 have better holding power and intensity, also provides certain help to naked electric core 4's firm, provides very big improvement to realizing naked electric core 4 assembly automatic feeding. The insulating structure is provided with a center hole 2, and the center hole 2 and the auxiliary current collector are concentric, so that the assembly efficiency can be improved.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. An insulation system of cylinder battery which characterized in that: including body (1), body (1) is cylindricly, the up end of body (1) is provided with centre bore (2), the lower terminal surface of body (1) is provided with the cavity of upwards sunken, the cavity includes first post chamber and second post chamber, the second post chamber is located the upper end in first post chamber, the diameter in first post chamber is greater than the diameter in second post chamber, the diameter in second post chamber is through being greater than the diameter in centre bore (2).

2. The insulating structure of cylindrical batteries according to claim 1, characterized in that: the body (1) is made of PP materials.

3. A cylindrical battery using an insulating structure, using the insulating structure according to any one of claims 1 to 2, wherein: including naked electric core (4), the welding of the negative pole terminal surface of naked electric core (4) has the negative pole mass flow body, the negative pole mass flow body includes the panel of being connected with the negative pole terminal surface and sets up the screw rod at panel center, the cover is equipped with O type circle (6) on the screw rod, insulation system's centre bore (2) cover is established on the screw rod and first post chamber are attached the lateral wall of naked electric core (4), insulation system is last to be provided with aluminum hull (7), aluminum hull (7) are provided with the hole of wearing that supplies the screw rod to wear out, be provided with nut (9) on the screw rod, nut (9) compress tightly aluminum hull (7) and insulation system the negative pole terminal surface.

4. The cylindrical battery using an insulating structure according to claim 3, wherein: an insulating sleeve (8) is further arranged between the nut (9) and the aluminum shell (7), the insulating sleeve (8) is arranged on the screw rod, and the nut (9) is pressed against the insulating sleeve (8).

5. The cylindrical battery using an insulating structure according to claim 3, wherein: the O-shaped ring (6) is arranged at the bottom end of the screw rod.