Simple but informative experiments on a plain separator for lead-acid batteries
✍ Scribed by F.L. Tye; A.L.S. Vasanthakumar
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 947 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0378-7753
No coin nor oath required. For personal study only.
✦ Synopsis
The mass transport properties of separators are deducible from the properties of the solution in the pores provided that the thickness, porosity, and tortuosity of the separator are known. Unexpected difficulties were encountered in directly measuring thickness, and an indirect method based on the liquid-filled volume of the separator was used. The latter required the amount of surface liquid held externally in the rough surface topography of the separator to be estimated. This was achieved by diffusion ingress experiments and the value obtained was confirmed by Talysurf measurements. The diffusion ingress experiments, a previously untried technique, also allowed an estimate of the tortuosity to be made and the good agreement between the experimental data and a theoretical model established that all the pores in Darak Armorib AR 60 had essentially the same tortuosity.