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Sealing assembly for battery, manufacturing method of sealing assembly for battery and lithium ion battery

A technology for sealing components and manufacturing methods, which is applied to battery pack parts, sealing materials, electrical components, etc., can solve the problems that the solder cannot completely flow and fill the welding seam, and the air tightness of the sealing components is poor, so as to achieve air tightness and Good peel strength, stable structure, and the effect of increasing the brazing area

Active Publication Date: 2013-07-03
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that the contact surfaces between the ceramic ring and the stem, the metal ring and the ceramic ring of the sealing assembly of the battery in the prior art are set perpendicular to the horizontal plane, and the brazing is performed on the circular surface perpendicular to the horizontal plane. , this brazing method has inevitable disadvantages, and it is prone to the situation that the solder cannot completely flow and fill the weld seam, resulting in the technical problem of poor airtightness of the sealing assembly

Method used

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  • Sealing assembly for battery, manufacturing method of sealing assembly for battery and lithium ion battery
  • Sealing assembly for battery, manufacturing method of sealing assembly for battery and lithium ion battery

Examples

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Embodiment 1

[0046] This embodiment 1 is used to illustrate the sealing assembly of the positive electrode of the battery disclosed in the present invention and its preparation method;

[0047] Step 1. Provide an alumina ceramic ring, an aluminum-magnesium alloy ring, and a titanium metal core column. The middle part of the aluminum-magnesium alloy ring is formed with a mounting hole, and the middle part of the alumina ceramic ring is formed with a connecting hole. The joint surface of the alloy ring and the alumina ceramic ring, and the connection surface of the alumina ceramic ring and the titanium metal core post are made into a torus with an inclination angle of 5 degrees with the centerline 23 of the ceramic ring; The first joint surface formed by the outer surface of the alumina ceramic ring, the second joint surface matched with the installation hole wall of the aluminum-magnesium alloy ring is made to be 5 degrees from the center line 23 of the ceramic ring, and the titanium metal c...

Embodiment 2

[0050] This embodiment 2 is used to illustrate the sealing assembly of the positive electrode of the battery disclosed in the present invention and its preparation method;

[0051] Step 1. Provide a ceramic ring, a metal ring, and a stem, wherein a mounting hole is formed in the middle of the metal ring, a connection hole is formed in the middle of the ceramic ring, the stem is an aluminum metal stem, and the ceramic ring is Zirconia ceramic ring, the metal ring is an aluminum-magnesium alloy ring, the joint surface of the metal ring and the ceramic ring is made into a torus with an inclination angle of 15 degrees from the center line of the ceramic ring, and the ceramic ring and the The connection surface of the stem column is made into a circular surface with an inclination angle of 20 degrees with the center line of the ceramic ring; that is to say, the outer surface of the ceramic ring forms the first joint surface, and the installation hole wall of the metal ring cooperate...

Embodiment 3

[0054] This embodiment 3 is used to illustrate the sealing assembly of the negative electrode of the battery disclosed in the present invention and its preparation method;

[0055] Step 1. Provide a ceramic ring, a metal ring, and a stem, wherein a mounting hole is formed in the middle of the metal ring, a connection hole is formed in the middle of the ceramic ring, the stem is a titanium metal stem, and the ceramic ring is Zirconia ceramic ring, the metal ring is an aluminum-manganese alloy ring, the joint surface of the metal ring and the ceramic ring is made into a torus with an inclination angle of 10 degrees from the center line of the ceramic ring, and the ceramic ring and the The connecting surface of the stem is made into a circular surface with an inclination angle of 10 degrees to the center line of the ceramic ring; that is to say, the outer surface of the ceramic ring forms the first joint surface, and the installation hole wall of the metal ring is matched with it....

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Abstract

The invention relates to a sealing assembly for a battery and a manufacturing method thereof. The sealing assembly comprises a metal ring, a ceramic ring and a stem; the middle part of the metal ring is provided with a mounting hole; the middle part of the ceramic ring is provided with a connecting hole; the ceramic ring is arranged in the mounting hole of the metal ring; the stem is arranged in the connecting hole of the ceramic ring; and the joint face of the metal ring and the ceramic ring and / or the junction surface of the ceramic ring and the stem is at an angle of 1 to 45 degrees with the center line of the ceramic line. The manufacturing method comprises the following steps: making the joint face of the metal ring and the ceramic ring and / or the junction surface of the ceramic ring and the stem to be at an angle of 1 to 45 degrees with the center line of the ceramic line; and installing the stem in the connecting hole of the ceramic ring and then installing the ceramic ring in the mounting hole of the metal ring. The invention also provides a lithium ion battery adopting the sealing assembly. The sealing assembly disclosed by the invention has a stabler structure and more excellent airtightness and peel strength.

Description

technical field [0001] The invention relates to the technical field of battery sealing; specifically, the invention relates to a battery sealing assembly and a manufacturing method thereof, and a lithium ion battery. Background technique [0002] At present, in the commonly used battery packaging technology, according to the packaging materials, it can be divided into three categories: plastic packaging, glass packaging and ceramic packaging; among them, plastic connection is difficult to meet the long-life (more than 20 years) storage requirements from the perspective of service life. Requirements for the use of high-performance batteries and reliable power batteries. connected by the vitreous. After long-term use and storage of lithium-ion batteries, the lower layer of the glass body that is in direct contact with the electrolyte of the lithium-ion battery will be corroded. It not only reduces the insulation performance of the glass, but also causes the leakage of the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/06H01M10/0525H01M50/184H01M50/188H01M50/191
CPCH01G9/2077B23K1/008B23K1/19C04B37/026C04B2237/121C04B2237/122C04B2237/123C04B2237/124C04B2237/343C04B2237/348C04B2237/402C04B2237/403C04B2237/405C04B2237/407C04B2237/52B23K2101/38Y10T29/4911Y02E60/10H01M50/186H01M50/191H01M50/561H01M50/184H01M50/188
Inventor 宫清林信平张旭林勇钊徐述荣
Owner BYD CO LTD
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