SMART MONITORING TO AUTONOMOUSLY TRACK BATTERY RELAXATION IN wBMS
AssigneeAnalog Devices, Inc.
InventorJackie HUI
Life of this patent
Estimating the term…
Abstract
A method of autonomously capturing open cell voltage (OCV) trends of a battery, including receiving, by a radio node of the battery and from a radio manager associated with a controller, a command to begin an OCV monitoring process, recording an initial OCV measurement, and determining if a period measurement interval has been reached and, if a period measurement interval has been reached, taking an OCV measurement and determining if an OCV rate of change between OCV measurements is less than a configured threshold.
Claims21
A method of autonomously capturing open cell voltage (OCV) trends of a battery for an electric vehicle, comprising:
- receiving, by a radio node of the battery and from a radio manager associated with a controller, a command to begin an OCV monitoring process;
- recording an initial OCV measurement;
- determining if a time period measurement interval has been reached and, if the time period measurement interval has been reached, taking an OCV measurement and determining if an OCV rate of change between OCV measurements is less than a configured threshold.
A system for autonomously capturing open cell voltage (OCV) trends of a battery, comprising:
- a host comprising:
- a controller;
- and
- a wireless communications manager;
- and
- an OCV battery monitoring subsystem, comprising:
- a wireless communication node;
- one or more OCV memories;
- one or more battery monitoring circuits;
- and
- one or more cell stacks, wherein each of the one or more battery monitoring circuits is coupled with one or more cell stacks,
- wherein the controller is configured to transmit a command to begin an OCV monitoring process via the wireless communications manager to the wireless communications node that causes the wireless communications node to execute the OCV monitoring process.
An apparatus for autonomously capturing open cell voltage (OCV) trends of a battery, comprising:
- a wireless communication node;
- one or more OCV memories;
- one or more battery monitoring circuits;
- and
- one or more cell stacks, wherein each of the one or more battery monitoring circuits is coupled with one or more cell stacks,
- wherein, upon wirelessly receiving a command from a host controller, the wireless communications node is configured to execute an OCV monitoring process that causes the wireless communications node to wake up at pre-configured intervals, wake up one or more of the battery monitoring circuits to make OCV measurements, and store the OCV measurements in the one or more OCV memories.
Dependencies are inferred from the claim text.