CN101286551B

CN101286551B - Standard lid group used for batteries and capacitors

Info

Publication number: CN101286551B
Application number: CN2008100284690A
Authority: CN
Inventors: 陈绍鸿
Original assignee: CHAOZHOU SANJIANG ELECTRONICS Co Ltd
Current assignee: Chaozhou Three Circle Group Co Ltd
Priority date: 2008-05-26
Filing date: 2008-05-26
Publication date: 2010-06-02
Anticipated expiration: 2028-05-26
Also published as: CN101286551A

Abstract

The invention relates to a standard cover group used for a battery or a capacitance, which includes a cover body and an electrode, furthermore, the electrode and the cover body are sealed and connected by glass insulation; the cover body comprises a cylindrical cover core and a broad shoulder which is coaxial with the cover core, the broad shoulder and an upper end surface of the cover core are the same whole, and a ring-shaped flange is arranged below the edge of the broad shoulder. The standard cover group which realizes the invention can be pressure-welded with various batteries or capacitances with different sizes by resistance welding to form an integral cover group, thus meeting the requirement that the cover plates of the batteries or capacitances with different specifications can be satisfied by using only one standard cove group; furthermore, as the standard cover group has comparatively large thickness, deformation and warpage phenomena can not be generated by high-temperature sintering, and as the cove plate needs not to go though high temperature, planeness can be kept during stamping, steam leakage of the cover group cannot be caused by the warpage during welding and sealing, thus the cover group has the advantages of higher strength and air tightness; as the diameter of the standard cover group is small, sintering fixtures can be universally used, furthermore, the standard cover group occupies small space, has high efficiency and low energy-consumption, and can effectively reduce the cost.

Description

A kind of standard cap group that is used for battery or electric capacity

Technical field

The present invention relates to a kind of glass-sealed battery cover group, relate in particular to a kind of standard cap group that is used for battery or electric capacity.

Background technology

The employed battery cover group of high-end lithium ion battery, adopting the glass packaging technology at present is best production method, earlier electrode, packaged glass parts and metal shell are assembled into electroded battery cover group semi-finished product, then electroded battery cover group semi-finished product are put into sintering furnace together with the sintering tool, make battery cover through certain processing step and form product, these parts are because its special performances is used to high-end battery, space flight and aviation for example, fields such as military affairs.But because the thinner thickness of major diameter lid group (can less than 1.5 millimeters), diameter big (can reach 35 millimeters), as easy as rolling off a log distortion when high temperature and glass sintering and produce warpage produces uneven stress when causing welding, makes packaged battery cover group have gas leakage hidden danger easily.Must use corresponding sintering tool for various lid groups again, particularly big specification lid group takes up space when sintering greatly, and sintering tool efficient is low, and energy consumption is big, and the unit interval output is low, and product reliability is poor.

Summary of the invention

For overcoming the deficiencies in the prior art, the invention provides a kind of glass-sealed battery cover group, can synthesize lid group with the battery or the capacitor board cap seal access node of multiple different size with high reliability.

The present invention is achieved in that a kind of standard cap group that is used for battery or electric capacity, comprises lid, electrode, and is tightly connected by glass insulation between electrode and the lid; Described lid comprises cylindrical cover core and the lid shoulder coaxial with cover core, and described lid shoulder is same integral body with the upper surface of cover core, is provided with annular flange flange below the lid shoulder edge.

The section of described annular flange flange is a sharp cone distal.

The cover core diameter of described lid is 4～12mm, and thickness is 2～5mm, and the diameter of lid shoulder is greater than cover core diameter 2～3mm, and the diameter of electrode is 0.5～3mm.

Described electrode is solid metal bar.

As a further improvement on the present invention, described electrode is the metal bar that the center is provided with through hole.

Further improve as of the present invention, described lid is the integral body of lid shoulder with the same thickness of cover core again.

Use standard cap group of the present invention and battery cover board sealing-in to be combined into the method for covering group, the steps include:

(1), selects standard cap group of the present invention for use;

(2), the battery cover board of selected required specification, on the cover board preset the overgauge assembly the cover core diameter and less than the through hole of lid shoulder diameter;

(3), the battery cover group that standard cap group and battery cover board are integral by the electric resistance welding pressure welding.

Battery cover board can with material comprise mild steel nickel plating, 304 stainless steels, can cut down etc., its thickness, diameter, shape are not limit.

By the made battery container of above-mentioned battery cover group, battery liquid can inject by the through hole of electrode, then with the through hole sealing, forms whole airtight cavity.

Because the sharp cone distal flange of standard cap group particular design, and, only form the HAZ district (heat affected area) of a ring-type in the zonule that contacts with battery cover board by the last push-down head guide current flow direction; And weld time is extremely short, have only the 10-20 millisecond, the heat of generation makes the metal temperature of standard package be lower than safe caloric impact temperature, and weld strength is greater than 120Mpa, be higher than when battery operated and press in issuable, thereby make the battery cover group obtain reliable air-tightness.

Standard cap group of the present invention also can be used for being welded into the sealed capacitor lid group of different size, and method is identical with the method for sealing of battery cover group.

Realize standard cap group of the present invention, the lid group that can be integral by the electric resistance welding pressure welding with the battery or the electric capacity cover plate of various different sizes, thus reach the requirement that only just can satisfy different specification of battery or electric capacity cover plate with a kind of standard cap group; Again because the standard cap group has bigger thickness, can not produce the distortion warping phenomenon through high temperature sintering, and cover plate need not pass through high temperature, smooth when having kept punching press, can not produce uneven stress during the welding encapsulation because of sticking up, so that cause the gas leakage of covering group, have higher-strength and bubble-tight advantage; Standard cap group diameter is little, can general sintering tool, and it is little to take up space, sintering tool efficient height, and energy consumption is little, reduces cost effectively.

Description of drawings

Fig. 1 is the structural principle schematic diagram of a kind of standard cap group of the present invention;

Fig. 2 is the upward view of Fig. 1;

Fig. 3 is the structural principle schematic diagram of the another kind of standard cap group of the present invention;

Fig. 4 is the structural principle schematic diagram of another standard cap group of the present invention;

Fig. 5 is that standard cap group and the cover plate of Fig. 1 is combined into battery cover group schematic diagram.

Fig. 6 is that standard cap group and the cover plate of Fig. 3 is combined into capacitor cover group schematic diagram.

Embodiment

Below in conjunction with accompanying drawing structural principle of the present invention is described further:

Embodiment 1: as depicted in figs. 1 and 2, a kind of standard cap group that is used for battery or electric capacity comprises lid 1, electrode 2, and is connected by glass 3 insulated enclosures between electrode 2 and the lid 1; Lid 1 comprises cylindrical cover core 11 and the lid shoulder 12 coaxial with cover core 11, and described lid shoulder 12 is same integral body with the upper surface of cover core 11, is provided with annular flange flange 13 below lid shoulder 12 edges, and the section of annular flange flange 13 is a sharp cone distal; The diameter of cover core 11 is 8mm, and thickness is 2.8mm, and the diameter of lid shoulder 12 is 10mm; Electrode 2 is provided with the metal bar of through hole 21 for the center, and diameter is 3mm.

Embodiment 2: as shown in Figure 3, the diameter of cover core 11 is 6mm, and the diameter of lid shoulder 12 is 8mm, and thickness is 4mm; Electrode 2 is solid metal bar, and its diameter is 1.3mm, and other structures are identical with embodiment 1.

Embodiment 3: as shown in Figure 4, lid 1 is the integral body of lid shoulder 12 with cover core 11 same thickness, and other structures are identical with embodiment 1.

Claims

1. standard cap group that is used for battery or electric capacity, it and cover plate sealing-in are combined into one and can form battery or electric capacity lid group, described standard cap group comprises lid, electrode, and be tightly connected by glass insulation between electrode and the lid, described lid comprises cylindrical cover core and the lid shoulder coaxial with cover core, it is characterized in that: described lid shoulder is same integral body with the upper surface of cover core, is provided with annular flange flange below the lid shoulder edge.

2. according to the described standard cap group that is used for battery or electric capacity of claim 1, it is characterized in that: the section of described annular flange flange is a sharp cone distal.

3. according to the described standard cap group that is used for battery or electric capacity of claim 1, it is characterized in that: the cover core diameter of described lid is 4～12mm, and thickness is 2～5mm, and the diameter of lid shoulder is greater than cover core diameter 2～3mm, and the diameter of described electrode is 0.5～3mm.

4. according to the described standard cap group that is used for battery or electric capacity of claim 1, it is characterized in that: described electrode is solid metal bar.

5. according to the described standard cap group that is used for battery or electric capacity of claim 1, it is characterized in that: described electrode is the metal bar that the center is provided with through hole.

6. according to the described standard cap group that is used for battery or electric capacity of claim 1, it is characterized in that: described lid is the integral body of lid shoulder with the same thickness of cover core.