Method and system for battery protection employing sampling of measurements
First Claim
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1. A power tool battery pack operable to supply power to a power tool, the battery pack comprising:
- a battery cell operable to supply a discharge current to power the power tool; and
a controller operable to control an operation of the battery pack when a battery pack condition is within a specified range,the controller being operable to sample the battery pack condition in at least a first sampling mode and a second sampling mode to produce a plurality of measurements, the first sampling mode having a first sampling rate and the second sampling mode having a second sampling rate, the first sampling rate being less than the second sampling rate, andthe controller being operable to average the plurality of measurements to produce an averaged measurement, the controller being operable to modify the operation of the battery pack when the averaged measurement is outside the specified range.
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Abstract
A system and method for battery protection. In some aspects, a power tool battery pack operable to supply power to a power tool includes a controller. The controller is operable to sample a battery pack condition in at least a first sampling mode and a second sampling mode to produce a plurality of measurements. The controller is further operable to average the plurality of measurements to produce an averaged measurement, and operable to modify operation of the battery pack when the averaged measurement is outside a specified range.
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Citations
10 Claims
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1. A power tool battery pack operable to supply power to a power tool, the battery pack comprising:
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a battery cell operable to supply a discharge current to power the power tool; and a controller operable to control an operation of the battery pack when a battery pack condition is within a specified range, the controller being operable to sample the battery pack condition in at least a first sampling mode and a second sampling mode to produce a plurality of measurements, the first sampling mode having a first sampling rate and the second sampling mode having a second sampling rate, the first sampling rate being less than the second sampling rate, and the controller being operable to average the plurality of measurements to produce an averaged measurement, the controller being operable to modify the operation of the battery pack when the averaged measurement is outside the specified range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A power tool battery pack operable to supply power to a power tool, the battery pack comprising:
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a housing; a plurality of battery cells positioned in the housing and operable to supply a discharge current to power the power tool, the battery cells having a lithium-based chemistry; and a controller operable to control an operation of the battery pack, the controller being operable to sample a battery pack condition in at least a first sampling mode and a second sampling mode to produce a plurality of measurements, the first sampling mode having a first sampling rate and the second sampling mode having a second sampling rate, the first sampling rate being less than the second sampling rate, and the controller being operable to average the plurality of measurements to produce an averaged measurement, the controller being operable to modify the operation of the battery pack when the averaged measurement is outside a specified range.
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Specification