Abstract: An electronic device is provided which comprises a DC-DC converter. The DC-DC converter comprises at least one solid-state rechargeable battery (B1, B2) for storing energy for the DC-DC conversion and an output capacitor (C2).

Abstract: An electronic device is provided which comprises a DC-DC converter. The DC-DC converter comprises at least one solid-state rechargeable battery (B1, B2) for storing energy for the DC-DC conversion and an output capacitor (C2).

Abstract: The present invention relates to a method for determination of the state-of-charge (SoC) of a rechargeable battery as a function of the Electro-Motive Force (EMF) prevailing in said battery. The invention also relates to a method for measuring the relation between the state-of-charge (SoC) and the EMF. The invention further relates to an apparatus for determination of the State-of-Charge (SoC) of a rechargeable battery as a function of the Electro-Motive Force (EMF) prevailing in said battery.

Abstract: A description is given of a secondary lithium metal battery in which the formation of lithium dendrites is inhibited. The battery (1) comprises negative electrode material (3) on a current collector (5) and positive electrode material (7) on a current collector (9) separated by a separator (11), which may be a polymer gel electrolyte optionally combined with a separator. According to the invention, the negative electrode (anode) has a high specific surface area, so that lithium dendrites are prevented during charging of the negative electrode. Examples of electrode materials of high surface area are particles of graphite, metals such as nickel, or metal foams, e.g. of nickel. Lithium intercalation does not occur in metals, whereas the intercalating capacity for lithium in graphite is at most 25 percent of the capacity of the positive electrode.

Abstract: A display device comprising a channel plate (39) having channels (30, 30′, 30″) containing an ionizable gas (33), and walls of the channels (30, 30′, 30″) being provided with electrodes (31, 32) for selectively ionizing the ionizable gas (33) during operation. The display device further includes an electro-optical layer and means for activating said electro-optical layer. The display device is characterized in that the ionizable gas (33) comprises a gas of the group formed by hydrogen, deuterium and deuterium hydrogen, and in that the display device is provided with means for supplying hydrogen, deuterium or deuterium hydrogen to the ionizable gas. Suitable materials include VZ2, LZ3, PdZ0.6, LaNi5Z6, LaNi2Zx, LaCo5Zx, Zr—Mn—Zx or Pd—Ag—Zx, where L is a lanthanide and Z is hydrogen and/or deuterium. The means are preferably situated in a recess (48) around the channel plate (39), in the pump connection (45) and/or they form part of the electrodes (31, 32).

Abstract: A battery management system 100 comprises input means 102 for receiving input signals, such as current or voltage, which represent a physical quantity of a battery. In operation, processing means 105 of the battery management system 100 calculate a physical quantity of the battery, such as the State of Charge, based on the input signals by using an electrochemical/physical model of the battery. The model includes a representation of a main electrochemical storage reaction, whose behaviour is calculated in dependence on a battery temperature. The processing means 105 calculates the battery temperature based on a temperature model of a temperature development in the battery. The battery management system 100 comprises output means 104 for outputting an output signal which is derived from a state of the electrochemical storage reaction. The battery management system 100 is, advantageously, used in a smart battery 10 or a battery charger/discharger 200.

Abstract: A description is given of an electro-optical switching device (1) comprising a transparent substrate (3), a switching layer (5) of yttrium hydride as a first electrode, a palladium layer (7), an electrolyte layer of, e.g. Ta.sub.2 O.sub.5 (9), a layer of WO.sub.3 hydride as the second electrode (11), and a transparent ITO-layer (13). Under the influence of a potential difference or direct current between the electrodes (5) and (11), the yttrium hydride is electrochemically converted from a low-hydrogen-content state to a high-hydrogen-content state, or vice versa. The conversion between both compositions is reversible, and is accompanied by a change in optical transmission. Apart from Y, other trivalent metals may be used, such as Gd and La.

Abstract: A rechargeable electrochemical cell having a negative electrode, whose electrochemically active material comprises an intermetallic compound having the CaCu.sub.5 -structure which forms a hydride with hydrogen, obtains a high loadability and a long life cycle by virtue of the fact that the intermetallic compound comprises a non-stoichiometric metastable phase. The intermetallic compound is, preferably, of the type having the composition AB.sub.m, where m exceeds 5.4.

Abstract: The invention relates to an electrochemical cell comprising a negative electrode of a stable hydride-forming material, in which a large loading capacity at low temperature is obtained by the addition of a catalytic material of the type DE.sub.3, wherein D is one or more of the elements selected from Cr, Mo and W, and wherein E represents Ni and/or Co.The catalytic material can be provided in the form of a eutectic segregation or it can be provided at the surface of powdered hydride-forming material by means of an electrochemical reaction.