MOS tube anti-explosion circuit, battery charging and discharging circuit and battery pack

Abstract

The utility model relates to battery package technical field discloses MOS pipe explosion -proof circuit, battery charging and discharging circuit and battery package, and the explosion -proof circuit includes negative pressure shutdown circuit, and the negative pressure shutdown circuit includes: the first end of pull -down resistance is connected with MOS pipe source, and the second end is connected with the first switch tube first end, the second end of first switch tube is connected with MOS pipe grid, and the control end receives MOS pipe drive signal. This structure can be in the external load short circuit, utilizes pull -down resistance detection current change to produce negative pressure signal. When short -circuiting large current flows through pull -down resistance, will produce voltage difference, and this voltage difference is passed to first switch tube, and the first switch tube is prompted to act, and MOS pipe is shut off quickly, avoids short -circuiting current to continue to impact MOS pipe, prevents its from overcurrent and produces too big power and explodes pipe, provides the basic short -circuit protection mechanism for MOS pipe.

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