Programmable MIT sensor using the abrupt MIT device, and alarm apparatus and secondary battery anti-explosion circuit including the MIT sensor
US8305221B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2007 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Aug 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K3/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided are an abrupt MIT device with variable MIT temperature or voltage, an MIT sensor using the abrupt MIT device, and an alarm apparatus and a secondary battery anti-explosion circuit including the MIT sensor. The MIT device includes an abrupt MIT layer undergoing an abrupt MIT at a transition temperature or a transition voltage and at least two electrode layers contacting the abrupt MIT layer. The transition temperature or the transition voltage varies with at least one of factors including a voltage applied to the electrode layers, a temperature, an electromagnetic wave, a pressure, and a gas concentration that affect the abrupt MIT layer. The MIT sensor is a temperature sensor, an infrared sensor, an image sensor, a pressure sensor, a gas-concentration sensor, or a switch. The alarm apparatus includes the MIT sensor and an alarm-signaling unit connected in series with the MIT sensor. The secondary battery anti-explosion circuit includes a secondary battery, the MIT sensor attached to the secondary battery to sense the temperature of the secondary battery and thus to prevent the possible explosion of the secondary battery, and a protection circuit body powered by the seconda…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.