| Patent application number | Description | Published |
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| 20090208823 | ESTABLISHING SPACE BETWEEN END OF CENTER GAS PIPE IN BATTERY AND BOTTOM OF BATTERY CAN - The gap between the bottom of a center gas vent pipe in a battery cell and the bottom of the cell can is established to be at least a minimum distance to reduce the risk of battery damage from inadequate gas venting. | 08-20-2009 |
| 20090233165 | Mitigating Rupture and Thermal Cascading of Battery Cells by Judicious Arrangement of Cells Inside a Pack - The invention described herein includes a method and apparatus comprising a plurality of battery cells electrically coupled to produce at least one voltage at a terminal, wherein the plurality of battery cells includes a plurality of junction areas. Each junction area comprises two battery cells longitudinally arranged such that an end of one battery cell faces an end of another battery cell. In a majority of the junction areas, the venting end of one battery cell does not face the non-venting end of the other battery cell. | 09-17-2009 |
| 20100055545 | VENTING MECHANISMS FOR BATTERY CELLS - The provision of improved venting in battery cells by way of better preventing pressure buildup in the cells. Via different variants of the present invention, the following advantages are achieved: | 03-04-2010 |
| 20100099013 | BATTERY WITH PRESSURE RELIEF CHANNEL - A battery having an outer casing and an anode/cathode assembly within that casing, wherein the anode/cathode assembly includes plural anodes and cathodes and electrolyte therebetween. The battery has a pressure relief feature associated with the casing and a channel preservation element sufficiently rigid to preserve at least one gas passageway to the pressure relief feature under conditions of anode/cathode assembly warpage. Thus the gas in the passageway will not become impeded by anode/cathode assembly warpage. | 04-22-2010 |
| 20100136386 | BATTERY CELL CONTAINMENT AND VENTING - A battery has a casing holding plural cells and a mesh wrapped around the cells to contain pieces of an exploding cell within the casing. To prevent overpressurization of the casing from the gas emitted by an exploding cell, a pressure relief feature is provided that allows gas to pass through battery casing. | 06-03-2010 |
| 20100243345 | BATTERY SAFETY FEATURES - The invention broadly provides improved safety features for batteries utilized in electronic devices. The invention provides an improved CID design that allows for more reliable disconnection (breaking the electrical circuit) during abnormal pressure or temperature events inside the cell. The invention provides a multi-layered CID configured to force electric current through a thin, fragile element such that the thin, fragile element is broken upon any abnormal pressure and temperature event. | 09-30-2010 |
| 20100247987 | Apparatus and System for an Internal Fuse in a Battery Cell - A battery is disclosed for reducing the severity of thermal runaway. The battery includes an anode sheet, a cathode sheet, and a separator situated between the anode sheet and the cathode sheet. The anode sheet, cathode sheet, and separator may be put together in a jelly roll configuration. The battery also includes internal fuses that subdivide the anode sheet, cathode sheet, or both, into electrically separate areas. The fuses are activated during thermal runaway and isolate separate areas of the sheet, thus reducing the total energy available during thermal runaway and reducing the severity. The fuses may be positive temperature coefficient (PTC) fuses that conduct current at normal operating temperatures but stop conducting current at temperatures above normal operating temperatures. The fuses may be placed in the current collectors, or directly into the anode sheet and cathode sheet themselves. In certain embodiments, the fuses may stop conducting when they reach a predefined threshold temperature or when an excessively large current passes through the fuses. | 09-30-2010 |
| Patent application number | Description | Published |
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| 20110214928 | Deactivating a Power Source - A battery is disclosed that includes two contact areas, an electrolyte, and a conductivity mechanism to increase electron conductivity internal to the battery between the two contact areas that, in turn, deactivates the battery. In one embodiment, the conductivity mechanism is triggered external to the battery. In another embodiment, the conductivity mechanism utilizes deactivator material to increase electron conductivity through the electrolyte to deactivate the battery. In yet another embodiment, the conductivity mechanism creates multiple shorts between the two contact areas to deactivate the battery. | 09-08-2011 |
| 20110217572 | DOUBLE ACTING VENTING MECHANISM FOR BATTERY CELLS - Embodiments of the invention provide battery cells having a double acting venting mechanism that provides reliable venting even in response to various undesirable events. Embodiments of the invention ensure that safe venting can take place, as necessary, even if the battery cell encounters internal and/or external pressure and/or deformation. | 09-08-2011 |
| 20110217582 | Internally Neutralizing a Power Source - A battery is disclosed that includes two contact areas, an electrolyte, and an electronically conductive material that, at a neutralization trip point temperature, increases electronic conductivity internal to the battery between the first contact area and the second contact area. In one embodiment, the electronically conductive material is void from being activated external to the battery. In another embodiment, the battery includes a semiconductor material that includes custom doping to provide the increased electron conductivity at the neutralization trip point temperature. In yet another embodiment, the battery includes an insulator for separating the electronically conductive material until a temperature internal to the battery reaches the neutralization trip point temperature, at which point permits the electronically conductive material to increase the electronic conductivity between the first contact area and the second contact area. | 09-08-2011 |
