Sealing material for electrochemical element and electrochemical element contg. same
A technology of electrochemical components and sealants, applied in the field of electrochemical components, can solve the problems of uneven sealing of sealants and the like
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0051] image 3 It is a longitudinal sectional view of a flat manganese dioxide / lithium battery with a thickness of 0.5 mm and a diameter of 20 mm manufactured in this example.
[0052] image 3 A state where the gasket 6 and the metal case 1 and between the gasket 6 and the sealing plate 5 are sealed with a sealant is shown. image 3 , the metal case is made of 0.1mm thick stainless steel plate and also has a positive terminal. The inner surface of the metal shell 1 is in contact with the positive electrode 2, and the positive electrode 2 is made of 0.18 mm thick pellets formed by pressure molding of mixed powder of manganese dioxide, graphite and binder. The upper surface of the positive electrode 2 was covered with a separator 3 made of a porous polypropylene sheet with a thickness of 0.03 mm. A negative electrode 4 made of metallic lithium with a thickness of 0.06 mm is provided opposite to the positive electrode 2 via a separator 3 . The negative electrode 4 is attach...
Embodiment 2
[0056] A battery was produced in the same manner as in Example 1, except for using a sealant mixed with 100 parts by weight of polyisobutylene having a viscosity average molecular weight of 900,000 and 30 parts by weight of the same tackifier as in Example 1. b.
Embodiment 3
[0075] Batteries were produced in the same manner as in Example 1, except that the amount of tackifier contained in the sealant was varied from 3 to 175 parts by weight per 100 parts by weight of butyl rubber shown in Table 3. However, a terpene-based resin (Picolite A-115 manufactured by Haikicores Co., Ltd.) was used as a thickener.
[0076] Using 10 of the obtained batteries, a thermal cycle test in which the batteries were periodically exposed to temperatures ranging from -20°C to +60°C was carried out, and the number of batteries in which liquid leakage occurred was checked after 250 cycles. The results are listed in Table 3.
[0077] Amount of tackifier added (weight)
[0078] In Table 3, for the batteries added with 3-150 parts by weight of tackifier per 100 parts by weight of butyl rubber, almost no liquid leakage was found in the heat cycle test. This may be because the elastic modulus of the sealant is lowered by adding the above-mentioned amount of tackif...
PUM
| Property | Measurement | Unit |
|---|---|---|
| softening point | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More