Abstract: Disclosed herein is a composition for use in a negative active material in a valve regulated lead-acid battery, including a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 ?m with the amount of carbon material ranging from 0.1 wt % to 1.5 wt % based on the total weight of the composition. Also disclosed herein is a valve regulated lead-acid battery, including a positive plate, a negative plate, a separator, and an electrolyte disposed in a container with a valve, the negative plate including a substrate of lead or a lead alloy and a negative active material of a composition including a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 ?m, the amount of carbon material ranging from 0.1 wt % to 1.5 wt % based on the total weight of the composition.

Abstract: A separator (1) for electrode plates (2) in gel storage batteries having two substantially rectangular layers (3, 3?) of a flat separator material, which layers come to lie in mutually superposed relationship. In order to provide less expensive separators for the separation of plate electrodes in gel storage batteries, which have a low electrical resistance and which afford additional protection for the edges and side surfaces and at the same time permit homogenous gel filling of the storage battery, the invention proposes that the two layers of separator material are connected together at least portion-wise in the region of their edges, forming a casing or pocket for the introduction of an electrode plate and a method and battery employing the separator.

Abstract: Disclosed herein is a composition for use in a negative active material in a valve regulated lead-acid battery, comprising: a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 ?m; wherein the amount of carbon material ranges from 0.1 wt % to 1.5 wt % based on the total weight of the composition. Also disclosed herein is valve regulated lead-acid battery, comprising: a positive plate, a negative plate, a separator, and an electrolyte disposed in a container comprising a valve, wherein the negative plate comprises a substrate comprising lead or a lead alloy and a negative active material comprised of a composition comprising a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 ?m; wherein the amount of carbon material ranges from 0.1 wt % to 1.5 wt % based on the total weight of the composition.

Abstract: A method of synthetic imaging comprising the steps of: emitting a first electromagnetic signal having a first frequency from a first radiation source, emitting at least one second electromagnetic signal having a second frequency from a second radiation source, wherein the first and second frequencies are different from each other, substantially simultaneously receiving the first signal and the second signal with a first receiver, substantially simultaneously receiving the first signal and the second signal with at least one second receiver, arranging an object on the path of at least one electromagnetic signal between the radiation sources and the receivers, wherein the signals are reflected by the object before they meet the receivers, and computing an image of the object from the signals received by the receivers and a device for practicing the method.

Abstract: The present invention relates to an electrode grid for a lead accumulator, comprising a grid substrate (1) and a coherent, galvanically deposited, multi-layer coating (2) on the grid substrate (1), wherein the grid substrate is produced from lead or lead alloy and the multi-layer coating comprises at least two layers which differ in respect of their composition, of which one layer (A) is produced by galvanic deposit of pure lead and one layer (B) which starting from the grid substrate is arranged over the layer (A) is produced by galvanic deposit of lead with at least 0.5% by weight and at most 2.0% by weight of tin.

Abstract: A process for the production of a lead accumulator comprising installing electrode plates and separators in a battery box, introducing an electrolyte in the form of a thixotropic gel including sulphuric acid and gel-forming agent into an electrolyte space and, closing of the battery box, wherein after installing the electrode plates the entire amount of sulphuric acid required for a desired electrolyte concentration is introduced into an electrolyte space within the box to form the electrode plates and after formation, an aqueous silica sol with 15 to 60% by weight of solids component, with a specific surface area of solids of 100 to 500 m.sup.2 /g, is added in such an amount that a solids concentration of the electrolyte, with respect to the overall weight thereof, of 3 to 20% by weight is obtained, and then the content of the electrolyte space is homogenously mixed.