The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 2019
Filed:
Mar. 10, 2017
Socreat Electronics Technology Limited, Shenzhen, CN;
SOCREAT ELECTRONICS TECHNOLOGY LIMITED, Shenzhen, CN;
Abstract
The present disclosure provides a self-activation circuit, where the self-activation circuit comprises an N-type metal oxide semiconductor (MOS) transistor Q, a PNP-type transistor Q, resistors R, R, R, R, and a capacitor C. A first end of the resistor Ris connected with a detection pin (CS) of the battery protection chip, and a drain electrode of the N-type MOS transistor Qis connected with a second end of the resistor R. A source electrode of the N-type MOS transistor Qis connected with a ground end of the storage battery, and a gate electrode of the N-type MOS transistor Qis connected with the ground end of the storage battery by the resistor R. A collector electrode of the PNP-type transistor Qis connected with the gate electrode of the N-type MOS transistor Q, and an emitter electrode of the PNP-type transistor Qis connected with an anode (PB+) of the storage battery; a base electrode of the PNP-type transistor Qis connected with the anode (PB+) of the storage battery by the resistor R, and the base electrode of the PNP-type transistor Qis connected with the ground end of the storage battery by the resistor R. The capacitor Cis connected with the resistor Rin parallel. When the self-activation circuit is connected with the battery protection chip at first time, level of the detection pin (CS) of the battery protection chip automatically reduces, further automatically activating the battery protection system and improving reliability of the battery protection system.