Quallion LLC

Joanna Dodd

Hisashi Tsukamoto

David M Skinlo

Clay Hajime Kishiyama

Joseph Wong

Mikito Nagata

Hiroyuki Yumoto

Phuong-Nghi Karen Lam

A method and apparatus for containing heat generated by a battery to reduce the amplitude of a temperature excursion to enhance safety in temperature critical applications, such as in implantable medical devices. The apparatus employs a heat absorber () closely thermally coupled to the battery (). The heat absorber includes heat-absorbing material preferably exhibiting an endothermic phase change at a temperature below that produced by the battery.

Method and apparatus for amplitude limiting battery temperature spikes

Method and device employing heat absorber for limiting battery temperature spikes

A defibrillator is disclosed. The defibrillator includes a secondary battery having a volume less than 5 cc. One or more capacitors are configured to store electrical energy from the battery in an amount sufficient to provide a patient with one or more defibrillation shocks. A processing unit is configured to control the storage of electrical energy in the one or more capacitors and to control the discharge of the electrical energy from the one or more capacitors. The battery can have a total volume of less than 4 cc or less than 3 cc.

Implantable defibrillator having reduced battery volume

The present invention discloses a device and method pertaining to battery construction. In the preferred embodiment, the shape and construction of the battery is designed to maximize energy density and efficiency, while minimizing volume and related restrictions. Furthermore, the efficient, simplified internal construction of the present invention, using readily available tubes, pins and spacers, renders it safe and reliable for medical applications, and lends to relative ease and cost effectiveness in manufacturing. The utilization of a neutral case further adds to the safety and reliability of the present invention. Also, the strategic positioning of the electrolyte fill hole allows for quick filling. A related battery construction tool and method are also disclosed adding to the overall usefulness and efficiency of the present invention.

Implantable battery

A negative electrode for use in secondary battery with nonaqueous electrolyte having a high voltage and energy density and a superior cycle property, characterized in that the active material comprises composite carbon materials containing massive ball-shaped graphite particles, carbon fibers, and graphite flakes. The massive ball-shaped graphite particles provide porosity to the composite, the carbon fibers improve packing density, conductivity, and stiffness to prevent the body made thereof from swelling and decomposing, and the graphite flakes reduce friction in the mixture. An aqueous, non-fluorine-containing binder is used, along with a titanium negative substrate.

Growing community of inventors

Burbank, CA, United States of America

Joanna Dodd