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A battery sealing assembly and manufacturing method thereof, and a lithium-ion battery

A technology for sealing components and manufacturing methods, applied in battery pack parts, sealing materials, electrical components, etc., can solve problems such as poor corrosion resistance and poor sealing performance, and achieve good sealing effect, improved service life, and reliable connection. Effect

Active Publication Date: 2015-09-30
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims to solve the technical problems that the sealing assembly of the battery in the prior art uses a glass body for sealing, poor corrosion resistance and poor sealing performance

Method used

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  • A battery sealing assembly and manufacturing method thereof, and a lithium-ion battery
  • A battery sealing assembly and manufacturing method thereof, and a lithium-ion battery
  • A battery sealing assembly and manufacturing method thereof, and a lithium-ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This embodiment combines figure 1 For illustrating the making of the sealing assembly of the negative electrode of the battery of the present invention:

[0047] figure 1 The manufacturing method of the sealing assembly of the positive electrode of the battery shown in Example 1 comprises the following steps:

[0048] Step 1, forming the ceramic ring: the ceramic powder of 95wt% alumina (also containing 5wt% glass sintering phase, as the composition is CaO-MgO-Al 2 o 3 -B 2 o 3 The glass) is pressed into a ceramic ring by dry pressing, and a receiving hole is formed in the middle of the ceramic ring;

[0049] Step 2. Form ceramic porous body: Mix alumina ceramic powders with two particle sizes of 12 μm and 2 μm in a weight ratio of 3:1, and then add paraffin to prepare a slurry, wherein the percentage of alumina ceramic powder is 65wt %, fill the slurry into the holding hole of the ceramic ring, then put the ceramic ring and the ceramic material filled in the cerami...

Embodiment 2

[0053] This embodiment 2 combines figure 2 For illustrating the making of the sealing assembly of the positive electrode of the battery of the present invention:

[0054] figure 1 The manufacturing method of the sealing assembly of the positive electrode of the battery shown in Example 1 comprises the following steps:

[0055] Step 1, forming a ceramic ring: pressing 95wt% alumina ceramic powder into a ceramic ring by dry pressing, and a receiving hole is formed in the middle of the ceramic ring;

[0056] Step 2. Form ceramic porous body: Mix alumina ceramic powders with particle sizes of 12 μm and 3 μm at a weight ratio of 3:1, and then add paraffin to prepare a slurry, wherein the percentage of alumina ceramic powder is 65wt %, fill the slurry into the holding hole of the ceramic ring, then put the ceramic ring and the ceramic material filled in the ceramic ring into the sintering furnace for sintering, and heat up to 600°C at a speed of 0.5°C / min for debinding for 2h , ...

Embodiment 3

[0060] This embodiment 3 combines image 3 For illustrating the making of the sealing assembly of the positive electrode of the battery of the present invention:

[0061] figure 1 The manufacturing method of the sealing assembly of the positive electrode of the battery shown in Example 1 comprises the following steps:

[0062] Step 1, forming a ceramic ring: pressing 95wt% alumina ceramic powder into a ceramic ring by dry pressing, and a receiving hole is formed in the middle of the ceramic ring;

[0063] Step 2. Form ceramic porous body: Mix alumina ceramic powders with particle sizes of 11 μm and 5 μm in a weight ratio of 3:1, and then add paraffin to prepare a slurry, wherein the percentage of alumina ceramic powder is 65wt %, fill the slurry into the holding hole of the ceramic ring, then put the ceramic ring and the ceramic material filled in the ceramic ring into the sintering furnace for sintering, and heat up to 600°C at a speed of 0.5°C / min for debinding for 2h , a...

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Abstract

A sealing assembly of a battery, a method for fabricating the sealing assembly and a lithium ion battery are provided. The sealing assembly may comprise: a ceramic ring having a receiving hole; a metal ring fitted over the ceramic ring; and a core column formed in the receiving hole, which comprises a metal-ceramic composite.

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] In the existing sealing of lithium-ion batteries, the cover plate and the core post of the sealing assembly are mainly sealed through the glass body. For example: CN2419690 discloses a kind of lid of lithium ion battery. The cover plate of the battery box and the lead core of the electrode are solidly sealed with a glass body; there is a liquid injection hole on the cover plate of the battery box, and the liquid injection hole is welded and sealed with a safety valve. The temperature coefficients of the battery box, glass body and electrode lead should be the same or similar. It can ensure the sealing of the battery and the release of dangerous pressure, thereby improving the efficiency and safety performance of lithium-ion batter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/08H01M10/0525H01M50/184H01M50/186H01M50/191
CPCY02E60/122H01M2/08H01M10/0525H01M2/065Y02E60/10H01M50/186H01M50/191H01M50/184
Inventor 宫清林信平周龙飞张伟锋
Owner BYD CO LTD
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