Abstract: A calcium-free lead alloy comprises lead and 0.003 wt %-0.025 wt % of at least two rare-earth metals. The rare-earth metals are at least a lanthanide and yttrium. Uses of the lead alloy include an electrode with an electrode structure, which is at least partly formed of the lead alloy and a lead-acid accumulator with the electrode.

Abstract: A lead alloy for an electrode grid comprises lead, 0.04 wt. %-0.08 wt. % calcium and 0.003 wt. %-0.025 wt. % of at least one rare earth metal. The at least one rare earth metal being yttrium. An electrode having an electrode framework formed at least partially of at least one of the lead alloys, a lead-acid accumulator having the electrode are also described.

Abstract: A calcium-free lead alloy comprises lead and 0.003 wt %-0.025 wt % of at least two rare-earth metals. The rare-earth metals are at least a lanthanide and yttrium. Uses of the lead alloy include an electrode with an electrode structure, which is at least partly formed of the lead alloy and a lead-acid accumulator with the electrode.

Abstract: The present invention relates to a device and a method for the detection of hydrogen in a gas volume by means of an exothermal catalytic recombination of hydrogen and oxygen present in the gas volume into water. The amount of energy that is released during such an exothermal catalytic recombination is measured in the form of a temperature difference and is compared with a stored limit value. When a corresponding limit value is exceeded an appropriate signal is output.

Abstract: The invention relates to a recombiner system (1) for catalytically recombining hydrogen that is produced in energy accumulators or energy converters. The aim of the invention is to provide a recombiner system (1) which can optionally be used for energy accumulator or energy converter systems having different operating conditions and that helps to counteract functional defects. For this purpose, the recombiner system (1) is formed by individual recombiner elements (2) that can be combined with each other in a modular fashion, said recombiner elements (2) comprising at least one respective catalyst (12).

Abstract: The present invention relates to a device and a method for the detection of hydrogen in a gas volume by means of an exothermal catalytic recombination of hydrogen and oxygen present in the gas volume into water. The amount of energy that is released during such an exothermal catalytic recombination is measured in the form of a temperature difference and is compared with a stored limit value. When a corresponding limit value is exceeded an appropriate signal is output.

Abstract: The invention relates to a recombiner system (1) for catalytically recombining hydrogen that is produced in energy accumulators or energy converters. The aim of the invention is to provide a recombiner system (1) which can optionally be used for energy accumulator or energy converter systems having different operating conditions and that helps to counteract functional defects. For this purpose, the recombiner system (1) is formed by individual recombiner elements (2) that can be combined with each other in a modular fashion, said recombiner elements (2) comprising at least one respective catalyst (12).

Abstract: The present invention relates to an accumulator arrangement with accumulators that can be operated in parallel, and also to a method for operating the accumulator arrangement according to the invention. The present invention is based on the problem of improving the exploitation of the capacity of an accumulator and of accumulator arrangements. As a solution the present invention proposes that the accumulator arrangement is configured in such a way that at least one lead-acid accumulator with a large internal resistance and at least one accumulator with a basic electrolyte respectively a sealed lead accumulator with a small internal resistance are operable in parallel.