Quasi-bipolar battery requiring no casing
US5441824A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1994 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Dec 23, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A quasi-bipolar battery is disclosed which has no casing, making it especially suitable for high-voltage, high-current applications where battery weight and cost are considerations. The quasi-bipolar battery is constructed of alternating bipolar plates and separator sheets, each of which has a frame of hard rubber which has been injection-molded thereon. This frame forms a gas-tight seal when these sheets and plates are stacked and compressed together to form the battery. Each biplate is formed with a tube of woven lead yarn which is slipped over a non-conductive biplate during the manufacturing process and prior to the injection-molding of the rubber frame. The injection-molded rubber frames bond beyond to the edges of the biplate and the lead yarn, and thereby prevent electrolyte leakage between cells by migration along the strands of lead yarn. When the battery cell stack is assembled and compressed axially, the compliant rubber frames interface with one another to form the seal and to permit lateral heat transfer. A thermal insulator at each axial and longitudinal end of the battery cell stack prevents axial heat transfer, thereby maintaining all the battery cells at a single, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.