Duracell Inc.

Other

Duracell International Inc.

P. R. Mallory Co.

Alwyn H Taylor

Daniel D Friel

Matthew P Hull

Louis W Hruska

Rudi Wieczorek

Elmar Zeising

Duong Van Phuoc

Peter R Moses

Terrence F Reise

Bhupendra Kanchanial Patel

Fred J Berkowitz

Gerald H Newman

Wayne L Lees

Michael L Cook

Paul L Bedder

Duong Var Phuoc

James B McVeigh, Jr

Michel Vernhes

Michael J Turchan

Michael J Turchan, Deceased

An improved high rate alkaline cell is obtained by employing an anode current collector comprising a foraminous metal.

Alkaline cell

A battery pack and a method of operating a battery system. The battery pack includes a rechargeable battery and a processor for monitoring the battery during charging and discharging. The processor receives data values representing the battery voltage, temperature and current, and the processor performs a series of calculations using those data values. The processor is part of a hybrid integrated circuit, which also incluses an analog-to-digital converter, a ROM and a RAM. Preferably, the integrated circuit comprises a multitude of layers, upper layers of the circuit form the ROM, and lower layers of the circuit form the RAM.

Battery pack having a processor controlled battery operating system

A battery pack and a method of operating a battery system. The battery pack includes a rechargeable battery, an analog-to digital converter, and a processor. The analog-to digital converter is able to convert both positive and negative analog signals to digital signals; and, in use, the converter receives analog signals representing battery voltage, battery temperature, and battery current, and converts those signals to digital signals. The processor receives those digital signals from the converter and uses those digital signals to perform a series of calculations.

Smart battery system with an A/D converter that converts both positive

A battery pack and a method of operating a battery system. The battery pack includes a rechargeable battery and a processor for monitoring the battery during charging and discharging. The processor receives data values representing the battery voltage, temperature and current, and the processor performs a series of calculations using those data values. The processor is part of a hybrid integrated circuit, which also includes an analog-to-digital converter, a ROM and a RAM. Preferably, the integrated circuit comprises a multitude of layers, upper layers of the circuit form the ROM, and lower layers of the circuit form the RAM.

A battery pack and a method of operating a battery system. The battery pack includes a rechargeable battery and a processor for monitoring the battery during charging and discharging. The processor receives data values representing the battery voltage, temperature and current, and the processor performs a series of calculations using those data values. In one of these calculations, the processor determines the actual full capacity of the battery. Preferably, the processor also keeps track of an uncertainty value that represents an uncertainty in the capacity of the battery; and the processor calculates the actual full capacity of the battery at the end of each discharge cycle if, at that time, the uncertainty value is less than a given percentage of a nominal full capacity of the battery.

A smart battery device which provides electrical power and which reports predefined battery parameters to an external device having a power management system, includes: at least one rechargeable cell connected to a pair of terminals to provide electrical power to an external device during a discharge mode and to receive electrical power during a charge mode, as provided or determined by the remote device; a data bus for reporting predefined battery identification and charge parameters to the external device; analog devices for generating analog signals representative of battery voltage and current at said terminals, and an analog signal representative of battery temperature at said cell; a hybrid integrated circuit (IC) having a microprocessor for receiving the analog signals and converting them to digital signals representative of battery voltage, current and temperature, and calculating actual charge parameters over time from the digital signals, the calculations including one calculation according to the following algorithm;

A rechargeable battery pack and a method of operating a rechargeable battery system. The battery pack includes a rechargeable battery, a processor for monitoring operation and performance of the battery, and a memory area for storing data values used by the processor. The memory area is normally powered by the battery, and a capacitor is provided to supply back-up power to the memory area in case of an interruption in the supply of electrical power to the memory area from the battery. The battery pack further includes a delatching circuit for electronically decoupling the memory area and the back-up capacitor from the battery under predetermined conditions.

A battery pack and a method of operating a battery system. The battery pack includes a rechargeable battery and a processor for monitoring the battery during charging and discharging. The processor receives data values representing the battery voltage, temperature and current, and the processor performs a series of calculations using those data values. The processor has normal, standby and sleep modes. In the normal mode, the processor performs the series of calculations at first regular cycles, and in the standby mode, the processor performs the series of calculations at second regular cycles, which are longer than the first cycles. Preferably, the processor enters the standby mode when the battery current falls below a predetermined current level, and the processor enters the sleep mode when the battery voltage falls below a first predetermined voltage level. Also, the processor exits the sleep mode when the battery voltage rises above a second predetermined voltage level higher than the first predetermined voltage level.

A smart battery which provides electrical power and which reports predefined battery parameters to an external device having a power management system, includes: at least one rechargeable cell connected to a pair of terminals to provide electrical power to an external device during a discharge mode and to receive electrical power during a charge mode, as provided or determined by the remote device; a data bus for reporting predefined battery identification and charge parameters to the external device; analog devices for generating analog signals representative of battery voltage and current at said terminals, and an analog signal representative of battery temperature at said cell; a hybrid integrated circuit (IC) having a microprocessor for receiving the analog signals and converting them to digital signals representative of battery voltage, current and temperature, and calculating actual charge parameters over time from the digital signals, the calculations including one calculation according to the following algorithm;

Smart battery algorithm for reporting battery parameters to an external

This invention relates to an electrochemical cell having spirally wound electrodes and an electrolyte which enhances plating of the anode metal during voltage reversal. The safety of such cells is improved by concentrating the current, during voltage reversal, between an outer segment of the anode and a metal sheet connected to the cathode whereby anode metal plates only onto the metal sheet. Thus, the hazardous condition of plating anode metal onto the cathode is avoided.

Electrochemical cell

The invention relates to spirally wound electrochemical cells in which the anode tab is located on a section of the anode that is sandwiched on both sides by cathode. This eliminates or minimizes problems normally associated with voltage reversal.

Spirally wound electrochemical cells

This invention provides a design for spirally wound electrochemical cells which improves their safety during abuse such as voltage reversal. The invention comprises coupling a first segment of inert conductive metal to the cathode and a dendrite target comprised of an inert conductive metal to the anode. When these electrodes are spirally wound together the two segments of inert conductive metal face each other, held in physical separation by the separator, whereby during voltage reversal a dendrite grows from said first segment to said dendrite target.

Electrochemical cells

A lithium-containing electrochemical cell with a glass-metal seal and cell terminal structure thereon with said glass comprising a glass loaded with alumina or other stable metal oxide or an aluminosilicate glass with or without such alumina or stable metal oxide loading.

Resistant glass in glass-metal seal and cell terminal structure for

The safety of a non-pressurized electrochemical cell such as a Li/MnO.sub.2 cell, having a safety pressure vent and an organic electrolyte solvent is enhanced by, in conjunction with said vent, providing said organic electrolyte solvent with at least 80% by volume of a volatile component, such as dimethoxyethane, having a boiling point between 30.degree. C. to 130.degree. C. Upon cell venting, under abuse conditions, the cell is thereby rapidly evacuated and safely rendered inoperable under further abuse conditions.

Cell with safe venting electrolyte

A non-aqueous Li/MnO.sub.2 cell having an electrolyte which improves the capacity thereof and which consists of an electrolyte salt such as LiClO.sub.4 dissolved in 1,3 dioxolane.

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Wellesley Hills, MA, United States of America

Alwyn H Taylor