| 摘要 |
1285802 Automatic topping-up device for storage batteries ROBERT BOSCH GmbH 13 Aug 1970 [14 Aug 1969] 38968/70 Heading HlB A vehicle storage battery having an automatic water topping up device comprises a topping up vessel 4 having a height of 10 to 120mm. situated on a container block 1 above the cell compartments 9 each of which has at least one inlet aperture 10 and a ventilation pipe 12, each inlet aperture containing a water-permeable finely porous material 11 such as polystyrene or sintered P.V.C. forming a water sluice which is positioned above the lower end 13 of the ventilation pipe 12 which determines the required electrolyte level. The upper edge of pipe 12 projects above a maximum liquid level in vessel 4 and is covered with a liquid repellent gas permeable material 15 such as sintered polyethylene, vessel 4 having a covering cap 8 and an opening in the cover cap through which vessel 4 may be filled. A known water-level remote control indicator (Fig. 2, not shown) may be built in cap 8 which gives a signal to a vehicle instrument panel when there is insufficient water in the topping up vessel 4. When the electrolyte level is below edge 13 of pipe 12, water runs out of vessel 4 through water lock 17 into cell 9 until the electrolyte level reaches edge 13 and prevents the outlet of air from cell 9. As shown in Fig. 1 the block cover 3, vessel 4 and pipe 12 are constructed as a single unit. In another embodiment (Fig. 3, not shown) the block cover, topping-up vessel and ventilating pipes are separate parts which are secured together by ventilating tubes provided with screw threads and flanges, in which a seal may be interposed the upper part of each ventilating channel is covered with liquid repellent gas permeable material and the inlet opening at the level of the base of the topping-up vessel is provided with a water-permeable finely-porous material. |
