Blackberry Corporation

Other

Surajit Sengupta

David Gerard Rich

Taha Shabbir Husain Sutarwala

Joseph Patino

Jonathan Quinn Brubacher

Yu William Feng

Taha Shabbir Sutarwala

In at least one embodiment, a power management module measures an electromagnetic radiation spectrum or a voltage response of a battery module. The measured electromagnetic radiation spectrum or voltage response of the battery is compared to a plurality of reference electromagnetic radiation spectrums or voltage responses, respectively, which may be determined for authentic batteries, for example. A relative condition of the battery, such as an age or state of health, may be estimated based on the measured electromagnetic radiation spectrum or voltage response of the battery module, and stored in a memory store. The rate of change of the relative condition of the battery over a period of time may be determined to identify potential defects in the battery.

Diagnostic use of physical and electrical battery parameters and storing relative condition data

A method mitigates or even prevents gas swelling of a battery of a portable electronic device at high temperatures and states of charge of the battery. The method comprises: receiving 'temperature' and 'state of charge' signals, which are functions of a temperature and state of charge of the battery, respectively; determining, as corresponding functions of the &#x201c;temperature&#x201d; and &#x201c;state of charge&#x201d; signals, whether the temperature is within an elevated operating-temperature range and the state of charge is within an elevated state-of-charge range; cycle-forming the battery a predetermined number of cycles; and terminating the &#x201c;cycle-forming&#x201d; operation of the battery when the pre-determined number of cycles is reached.

System and method of mitigating high-temperature, high-charge gas swelling of battery of portable electronic device

In at least one embodiment, a power management module measures different observable quantities of a battery, such as terminal voltage or current, and measures a voltage response of the battery based upon the measurements. The measured voltage response of the battery is compared to a plurality of reference voltage responses, which may be determined for authentic batteries, for example. If the measured voltage response corresponds to each of the reference voltage responses, the battery is authenticated for use with an electronic device. If necessary, additional voltage responses may be measured and compared against corresponding reference voltage responses until the battery is authenticated by a sufficient number of corresponding responses. A relative condition of the battery, such as an age or state of health, may also be estimated based on the measured voltage response of the battery.

Diagnostic use of a plurality of electrical battery parameters

Diagnostic use of physical and electrical battery parameters is made to enhance battery authentication and security. A power management module measures an electromagnetic radiation spectrum of a battery module based on signal strengths of the electromagnetic radiation detected at one or more antennas. The measured electromagnetic radiation spectrum of the battery is compared to a reference electromagnetic radiation spectrum, which may be specified for authentic batteries, for example. If the measured electromagnetic radiation spectrum corresponds to the reference electromagnetic radiation spectrum, the battery is authenticated for use with the mobile communication device. A relative condition of the battery, such as an age or state of health, may also be estimated based on the measured electromagnetic radiation spectrum of the battery module.

Diagnostic use of physical and electrical battery parameters

A method of developing an optimum a lithium battery charging algorithm is conducted by providing a salt dissolved in solvent permitting lithium ions to leave a cathode in large format battery cells. Charge and discharge are then measured under different C-rate conditions. Using the cathode material phase transformations to ascertain a differential curve, peaks in the differential curve are observed with all data plotted against dV/dt and V, where V represents voltage and t represents time. Areas in voltage ranges are then observed where the rate of increase is higher than in other areas. By varying the charging current, an optimum charging voltage can be ascertained and maintained.

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Kitchener, Canada

Surajit Sengupta