SEALED BATTERY

• Main Author: MATSUURA TOMOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 04.02.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a sealed battery enabling each of a plurality of types of gases generated in a case to be appropriately discharged to the outside of the case.SOLUTION: A sealed battery comprises a case 2 and a plurality of sealing portions. The case 2 houses an electrode body and an electrolyte. The plurality of sealing portions are formed of a polymer material having gas permeability, and seal a gap leading from the inside to the outside of the case 2. The plurality of sealing portions include first sealing portions and second sealing portions. The first sealing portion is formed of a material having a higher transmittance of a first gas than that of the material of the second sealing portion. The second sealing portion is formed of a material having a transmittance of a second gas different from that of the first gas, which is higher than that of the material of the first sealing portion. Both the first gas and the second gas are the types of gases that can be generated inside the case of the sealed battery.SELECTED DRAWING: Figure 2 【課題】ケース内で発生した複数種類のガスの各々を適切にケース外に排出することが可能な密閉型電池を提供する。【解決手段】密閉型電池は、ケース２と複数の封止部を備える。ケース２は、電極体および電解質を収容する。複数の封止部は、ガス透過性を有する高分子材料によって形成され、ケース２の内部から外部に通じる隙間を封止する。複数の封止部には、第１封止部と第２封止部が含まれている。第１封止部は、第１気体の透過率が第２封止部の材質よりも高い材質によって形成されている。第２封止部は、第１気体とは異なる第２気体の透過率が第１封止部の材質よりも高い材質によって形成されている。第1気体および第２気体は、いずれも当該密閉型電池の前記ケース内部において発生し得る種類の気体である。【選択図】図２