International Business Machines Corporation

Guoda Lian

James A O'Connor

Shidong Li

Junjun Li

Hongqing Zhang

Madhana Sunder

Zhigang Song

Conor R Thomas

Jay A Bunt

A flexible circuit substrate that includes a conductive line on a flexible substrate and at least one slot in the conductive line on the flex substrate, where at one slot is in an area of the flexible circuit substrate that will be bent to prevent an open in the conductive line on the flexible substrate.

Flexible circuit structure for circuit line bending

Tamper-respondent assemblies are provided which include a circuit board, an enclosure assembly mounted to the circuit board, and a pressure sensor. The circuit board includes an electronic component, and the enclosure assembly is coupled to the circuit board to enclose the electronic component within a secure volume. The enclosure assembly includes an enclosure with a sealed inner compartment, and a structural material within the sealed inner compartment of the enclosure. The structural material within the enclosure inhibits deflection of the enclosure due to a pressure differential between pressure of the sealed inner compartment and pressure around, at least in part, the enclosure. The pressure sensor senses pressure within the sealed inner compartment of the enclosure to facilitate identifying a pressure change indicative of a tamper event.

Tamper-respondent assembly with structural material within sealed inner compartment

A system for explosively applying a fire-fighting foam is provided. The system includes a thermoelectric generator that is attached to a battery heat source. A temperature differential across the thermoelectric generator generates an electrical current having a temperature-dependent voltage. A detonator circuit is electrically connected to the thermoelectric generator. The detonator circuit measures the voltage of the electrical current. An explosive foam applicator is communicatively connected to the detonator circuit and includes a trigger mechanism that detonates a propelling charge in response to receiving a signal from the detonator circuit when the detonator circuit determines that the electrical current corresponds to temperature that is greater than or equal to a threshold temperature. The explosive foam applicator is oriented such that detonating the propelling the charge causes the explosive foam applicator to apply a foam to the battery heat source.

Automatically generating fire-fighting foams to combat Li-ion battery failures

An apparatus for automatically generating a fire-fighting foam at elevated temperatures is provided. The apparatus includes a container sized to hold at least one battery. Water is stored within the container. One or more cartridges made, at least in part, of a temperature-dependent breakdown material are stored within the container. The one or more cartridges contain a foaming agent. Heat generated by a failing battery causes the temperature-dependent breakdown material to fail such that the foaming agent is released from at least one cartridge to mix with the water stored within the container.

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Poughkeepsie, NY, United States of America

Guoda Lian