Patent application number | Description | Published |
20100075221 | Cell thermal runaway propagation resistance using an internal layer of intumescent material - A means for inhibiting the propagation of thermal runaway within a plurality of batteries is provided, wherein the means is comprised of at least one layer of intumescent material interposed between the interior surface of the casing of a battery and the corresponding electrode assembly. | 03-25-2010 |
20100086844 | Cell Thermal Runaway Propagation Resistance Using Dual Intumescent Material Layers - A means for inhibiting the propagation of thermal runaway within a plurality of batteries is provided, wherein the means is comprised of a pair of intumescent material layers coating the battery casing, or at least a portion thereof. | 04-08-2010 |
20100136385 | Method and apparatus for maintaining cell wall integrity during thermal runaway using an outer layer of intumescent material - A method and apparatus is provided in which a layer of an intumescent material surrounds the casing of a battery, the layer helping to prevent the formation of perforations in the battery casing during a thermal runaway event and, if a perforation is formed, inhibiting the flow of hot, pressurized gas from within the battery. A sleeve, surrounding the cell, may be used to contain the intumescent material during the thermal event. | 06-03-2010 |
20100136391 | Active Thermal Runaway Mitigation System for Use Within a Battery Pack - An active thermal runaway mitigation system is provided that mitigates the effects of a single cell undergoing thermal runaway, thereby preventing the propagation of the thermal runaway event to neighboring cells within the battery pack. The provided system includes at least one, fluid-containing conduit in proximity to the cells within the battery pack. The conduit includes a plurality of breach points in proximity to the subset of cells, where each breach point is configured to form a breach at a preset temperature that is lower than the melting temperature of the conduit. Once a breach is formed, the fluid contained within the conduit is discharged through the breach. | 06-03-2010 |
20100273034 | Battery pack enclosure with controlled thermal runaway release system - A battery pack thermal management system is provided that is comprised of at least one enclosure failure port integrated into at least one wall of a battery pack enclosure, where the enclosure failure port(s) remains closed during normal operation of the battery pack, and opens during a battery pack thermal runaway event, thereby providing a flow path for hot gas generated during the thermal runaway event to be exhausted out of the battery pack enclosure in a controlled fashion. | 10-28-2010 |
20110014506 | Method and Apparatus for Maintaining Cell Wall Integrity Using a High Yield Strength Outer Sleeve - A method and apparatus is provided in which a pre-formed sleeve or pre-formed secondary can comprised of one or more layers of a high yield strength material is positioned around the pre-formed battery case, the pre-formed sleeve/secondary can inhibiting the flow of hot, pressurized gas from within the battery through perforations formed in the battery casing during a thermal runaway event. | 01-20-2011 |
20110014514 | Cell with an Outer Layer of Intumescent Material - A battery assembly is provided that includes a layer of intumescent material that coats the sidewall and bottom surface of the cell casing, excluding at least one case contact region. | 01-20-2011 |
20120013341 | Method and Apparatus for Electrically Cycling a Battery Cell to Simulate an Internal Short - A test apparatus and corresponding method for simulating an internal cell short and initiating thermal runaway in a battery cell is disclosed whereby the cell is internally heated through rapid charge and discharge cycles at high currents. The magnitude of the selected current may be modulated to simulate a cell short with the desired power profile without unrealistically heating neighboring cells or interfering with the thermal environment of the cell within the module. | 01-19-2012 |
20120308857 | Method and Apparatus for Maintaining Cell Wall Integrity Using a High Yield Strength Outer Casing - A method and apparatus is provided in which a pre-formed secondary can comprised of one or more layers of a high yield strength material is positioned around the pre-formed battery case, the pre-formed secondary can inhibiting the flow of hot, pressurized gas from within the battery through perforations formed in the battery casing during a thermal runaway event. | 12-06-2012 |
20120308858 | Battery Pack Enclosure with Controlled Thermal Runaway Release System - A battery pack thermal management system is provided that is comprised of at least one enclosure failure port integrated into at least one wall of a battery pack enclosure, where the enclosure failure port(s) remains closed during normal operation of the battery pack, and opens during a battery pack thermal runaway event, thereby providing a flow path for hot gas generated during the thermal runaway event to be exhausted out of the battery pack enclosure in a controlled fashion. | 12-06-2012 |
20120308859 | Battery Pack Enclosure with Controlled Thermal Runaway Release System - A battery pack thermal management system is provided that is comprised of at least one enclosure failure port integrated into at least one wall of a battery pack enclosure, where the enclosure failure port(s) remains closed during normal operation of the battery pack, and opens during a battery pack thermal runaway event, thereby providing a flow path for hot gas generated during the thermal runaway event to be exhausted out of the battery pack enclosure in a controlled fashion. | 12-06-2012 |
20130059181 | Battery Cap Assembly with High Efficiency Vent - A battery cell design is disclosed that provides a predictable pathway through a portion of the cell (e.g., the cell cap assembly) for the efficient release of the thermal energy that occurs during thermal runaway, thereby reducing the chances of a rupture in an undesirable location. Furthermore the disclosed design maintains the functionality of the cell cap as the positive terminal of the cell, thereby having minimal impact on the manufacturability of the cell as well as its use in a variety of applications. | 03-07-2013 |