Tesla Motors, Inc.

Tesla, Inc.

Brian Stuart Boggs

Joseph Michael Darragh

Anil Paryani

Scott Ira Kohn

Andrew David Baglino

Craig Bruce Carlson

Mark Goldman

Chuen Chou

Mark D Goldman

A system and method for providing energy management and maintenance of a high energy battery pack through use self-discharge features and processes. A battery pack is configured with self-discharger enabled-components that selectively discharge energy from the battery pack without the battery pack providing operational power.

Self-discharge for high voltage battery packs

A system and method for providing energy management and maintenance of a high energy battery pack that does not require installation of the battery pack into an operational EV. A battery service unit has multiple access mechanisms to charge or discharge a high energy battery pack through a primary or secondary high voltage port of the pack, irrespective of whether the battery pack is installed into an operating environment by adding a capability of providing a signature duplicating installation of the pack in the operating environment when necessary.

Method and system for servicing high voltage battery packs

A system and method for providing energy management and maintenance of a high energy battery pack that does not require installation of the battery pack into an operational EV. A secondary service port is provided to enable certain maintenance operations while by-passing battery pack interlocks and protection mechanisms used when the battery pack is installed into an operating environment.

Secondary service port for high voltage battery packs

Bench swing

A method for accurately estimating battery capacity based on a weighting function is provided. The disclosed system monitors battery current and uses the monitored battery current to calculate the state of charge (SOCbyAh) of the battery. The system also measures the open circuit voltage (OCV) of the battery when the system is at rest, rest being determined by achieving a current of less than a preset current value for a period of time greater than a preset time period. The state of charge of the battery is calculated from the OCV (SOCbyOCV). The weighting function is based on &#x394;SOCbyAh and &#x394;SOCbyOCV, where &#x394;SOCbyAh is equal to SOCbyAhminus SOCbyAh, and where &#x394;SOCbyOCV is equal to SOCbyOCVminus SOCbyOCV. The weighting function also takes into account the errors associated with determining SOCbyAh and SOCbyOCV.

Battery capacity estimating method and apparatus

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Menlo Park, CA, United States of America

Brian Stuart Boggs