Invention Grant
- Patent Title: Methods and apparatus for extending discharge over-current trip time in a battery protection circuit
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Application No.: US16006449Application Date: 2018-06-12
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Publication No.: US10978891B2Publication Date: 2021-04-13
- Inventor: Robert L. Snyder , Donald L. Flowers
- Applicant: Motorola Solutions, Inc.
- Applicant Address: US IL Chicago
- Assignee: Motorola Solutions, Inc.
- Current Assignee: Motorola Solutions, Inc.
- Current Assignee Address: US IL Chicago
- Agency: Baker Botts L.L.P.
- Main IPC: H02J7/00
- IPC: H02J7/00

Abstract:
Methods and apparatus for extending discharge over-current trip time in a battery protection circuit are disclosed. The protection circuit includes a safety circuit that asserts a first discharge over-current indicator when the discharge current of the battery exceeds a first discharge over-current threshold corresponding to a sustained over-current limit, a delay circuit that applies an added delay to the assertion of the first discharge over-current indicator, and a short circuit detection circuit that asserts a second discharge over-current indicator, with no delay added, when the discharge current exceeds a second discharge over-current threshold corresponding to a cell-specific peak output current limit. The battery protection circuit includes a logic circuit configured to assert a discharge over-current control signal to disable the battery responsive to assertion of the first discharge over-current indicator or the second discharge over-current indicator.
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