Power conversion device in electric vehicle

摘要

A power conversion device in an electric vehicle that uses a short-circuit capacitor and is capable of detecting a short circuit of the capacitor by using a simple structure. The power conversion device includes an inductor connected on a main battery side with a switching member provided between the inductor and a power line. The power line connects a first capacitor and a second capacitor as well as an electric load in parallel. A controller is provided for controlling the on/off of the switching member. The first capacitor and the second capacitor are each a small capacitor configured to be short-circuited upon application of an excess voltage. The power conversion device is provided with a detection member for detecting a short circuit of any one of the first capacitor and the second capacitor. The detection member is connected in series to the first capacitor and the second capacitor.

主权项

1. A power conversion device in an electric vehicle, the power conversion device comprising:
an inductor connected on a battery side; switching means provided between the inductor and a power line; the power line connecting a first capacitor and a second capacitor and an electric load in parallel; and control means for Controlling on/off of the switching means so as to step up power from the battery and supply the power to the electric load or so as to step down power from the electric load and supply the power to the battery; wherein the first and second capacitors are configured to be short-circuited upon application of an excess voltage; and the power conversion device further comprises informing means for informing of a short circuit of the first and second capacitors, the informing means being connected in series to the capacitor.