Patent ID: 9653907
Date: 2017-05-16
CPC Classifications: B60L,H02H,H02J,Y02T

Claim:
1. A protection system against reverse battery connection, the system comprising: a controller configured to output a first square wave signal comprising a second square wave signal and a third square wave signal to an input terminal of a transformer using a first DC voltage output from an on-board charger (OBC) of a battery of an electric vehicle; the transformer configured to output a fourth square wave signal obtained by transforming the first square wave signal; a rectifier configured to rectify the fourth square wave signal to output a second DC voltage; and a transistor located between the OBC and the battery and configured to perform protection against reverse connection of the battery using the second DC voltage, wherein: the transistor comprises a gate terminal connected to the rectifier, a drain terminal connected to the OBC and a source terminal connected to the transformer; the transistor is turned on such that the OBC and the battery are electrically connected when the second DC voltage is input from the rectifier; and the transistor is turned off such that the OBC and the battery are not electrically connected when the second DC voltage is not input from the rectifier.