Battery operated one-shot device mitigating the effects of lithium battery passivation
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United States of America
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Jan 7, 2025
Grant Date -
Sep 9, 2021
app pub date -
Mar 9, 2021
filing date -
Mar 9, 2021
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Abstract
Battery operated one-shot (energetic firing) device having logic subsystem connected to source and operated in ultra-low power idle mode during storage to continuously draw a small amount of current from power source to reduce growth of passivation layer thereon. Power switch(es) throttle application of power to other components (e.g., environmental sensing circuit, energetic fire circuit) until device is active. Power switch(es) may be mechanical switch(es) manually operated or controlled by environmental conditions or logic-controlled switch(es). Power switch(es) can be used to sequentially provide power to other components to minimize voltage dip caused by de-passivation of power source. Logic subsystem may include current pulse generator for causing a current burst to be drawn from power supply to break down passivation layer and timer for tracking time since last current burst, both operational in ultra-low power idle mode. Bursts may occur at defined intervals as required by system design and shelf-life requirements.
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