Apparatus and method for fusing battery terminals with improved induction heating power control
US4501943A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1983 |
| Grant date | Feb 26, 1985 |
| Priority date | — |
| Expiry date | Sep 19, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49114
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for fusing the ends of battery cell terminal posts and the ends of hollow bushings fixed in the plastic cover of a battery being assembled and within which the terminal posts are concentrically disposed. The apparatus includes a pair of induction heating coils which each concentrically support a mold cavity insert adapted to receive the ends of the terminal posts and bushings to be fused and a ferrite insert adapted to concentrate induced current in the ends of the terminal post and bushings upon energization of the coils. An electrical control is provided for selectively generating a radio-frequency oscillating current in the coils to effect heating, melting, and fusion of the ends of the terminal posts and bushings to consistent fusion depths while the plastic battery case remains substantially uneffected. The control is adapted to substantially instantaneously energize the inductance heating coils to a first power level, maintain such power level for a first predetermined period for melting the ends of the terminal posts and bushings, and then gradually decrease the power level in a substantially uniform controlled manner for a second predetermined period…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.