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Protection de batterie et système de récupération de batterie à zéro volt pour un dispositif médical implantable
专利权人:
Boston Scientific Neuromodulation Corporation
发明人:
申请号:
EP09004190.6
公开号:
EP2072080B1
申请日:
2006.10.19
申请国别(地区):
EP
年份:
2017
代理人:
摘要:
The present invention relates to a circuitry useable to protect and reliably charge a rechargeable battery, even from a zero-volt state, and is particularly useful when employed in an implantable medical device. The circuit includes two charging paths, a first path for trickle charging the battery at a relatively low current when the battery voltage is below a threshold, and a second path for charging the battery at relatively higher currents that the battery voltage is above a certain threshold. A passive diode is used in the first trickle-charging path which allows trickle charging even when the battery voltage is too low for reliable gating, while a gateable switch (preferably by PMOS transistor) is used in the second higher-current charging path when the voltage is higher and the switch can therefore be gated more reliably. A second diode between the two paths ensures no leakage to the substrate through the gateable switch during trickle charging. The load couples to the battery through the switch, and preferably through a second switch speicifically used for decoupling the load.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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