Battery pack hot plug protection circuit and method
A protection circuit, hot-swap technology, applied in the field of electronics, can solve problems such as overvoltage, overcurrent, negative pressure, etc., achieve good switching speed and power consumption, reduce system costs, and facilitate component stocking.
Pending Publication Date: 2019-07-05
HANGZHOU BMSER TECH
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The invention provides a battery pack hot plug protection circuit and method. The battery pack comprises N series connected batteries, the positive pole of the kth battery is connected to the negativepole of the k+1th battery; the hot plug protection circuit comprises N branches, the kth branch corresponds to the positive pole of the kth battery, the Nth branch corresponds to the positive pole ofthe Nth battery, and each branch is connected in series with a switch tube; a first control signal controls the on and off of the respective switch tubes and changes in real time as each switch tubeis turned on and off, the difference between the first control signal and the voltage of the output end of each branch is divided to drive the on and off of the switch tubes on corresponding branches;the kth branch is preferentially turned on than the k+1th branch, and the kth branch is turned off slower than the k+1th branch, wherein k is greater than or equal to 1, and +1 is greater than k andless than or equal to N. The battery pack hot plug protection circuit and method completely suppress surge current and surge voltage and improve circuit performance.
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