| 摘要 |
1524669 Pressure relief devices for batteries ESB Inc 8 July 1977 [26 Oct 1976] 28795/77 Heading H1B A plastics cover 20 for a cell has a hole 34 for release of gases closed by a plug 36, which is ejected at a predetermined pressure. The plastics is of low characteristic creep (polysulphone, nylon, polyphenylene oxide, polypropylene) such that the pressure on the plug remains constant. |
