Temperature compensation in recharging of batteries
First Claim
1. A method or charging flooded deep cycle lead acid batteries comprising the steps of:
- effectively measuring the temperature of such a battery having an initial charge deficiency,applying to the battery a first amount of charging energy adequate, in combination with the initial charge condition of the battery, to cause the battery to attain a detectable charge state which is less than a full charge condition and which has a temperature-variable determinable relation to a full charge condition,providing information describing the variation with temperature of a) the relation of the first amount of charging energy to the initial charge deficiency of the battery, and b) the relation of total charging energy deliverable to the battery to attain full charge and effective conditioning of the battery to the initial charge deficiency of the battery, andapplying to the battery a further second increment of charging energy which is adequate, in combination with the initial charge condition and the first amount of charging energy, to overcharge the battery to a particular extent which can vary with battery temperature and the quantity of which is determined as a selected percentage of the first amount of charging energy when the detectable state is attained and with respect to a battery having the measured temperature.
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Accused Products
Abstract
Temperature compensation methods and equipment for charging electric storage batteries are described. Control over battery charging includes measurement of battery temperature at the commencement of a charging event, and use of inflection analysis of a charger voltage-time curve to detect the attainment of a distinctive signal point in the event. To compensate for the variations with initial battery temperature on the relation of the signal point to a different battery condition of interest, control of a charging event includes use of the measured battery temperature to obtain from a controller memory information about the applicable values of process parameters pertinent to those temperature-variable process factors. The temperature of a battery charger which includes such controls preferably is used as a workable approximation to battery temperature, so that batteries of conventional construction can benefit from use of the disclosed methods and equipment.
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Citations
10 Claims
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1. A method or charging flooded deep cycle lead acid batteries comprising the steps of:
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effectively measuring the temperature of such a battery having an initial charge deficiency, applying to the battery a first amount of charging energy adequate, in combination with the initial charge condition of the battery, to cause the battery to attain a detectable charge state which is less than a full charge condition and which has a temperature-variable determinable relation to a full charge condition, providing information describing the variation with temperature of a) the relation of the first amount of charging energy to the initial charge deficiency of the battery, and b) the relation of total charging energy deliverable to the battery to attain full charge and effective conditioning of the battery to the initial charge deficiency of the battery, and applying to the battery a further second increment of charging energy which is adequate, in combination with the initial charge condition and the first amount of charging energy, to overcharge the battery to a particular extent which can vary with battery temperature and the quantity of which is determined as a selected percentage of the first amount of charging energy when the detectable state is attained and with respect to a battery having the measured temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification