公开(公告)号：US20220258635A1

公开(公告)日：2022-08-18

申请号：US17669645

申请日：2022-02-11

Applicant: Webasto SE

Inventor： Waldemar Felde ,  Florian Koerfer

IPC: B60L53/62 ,  H02J7/06 ,  H02J7/00

Abstract: Charging device for charging and/or discharging an electrical energy store, which is preferably a traction battery for an electric or hybrid vehicle, wherein the charging device has: a main current path, which can be connected to a grid connection and the energy store, wherein the grid connection supplies an AC voltage; at least one relay, which is arranged in the main current path, has a make contact and is set up to interrupt the main current path in an open contact position and to close the main current path in a closed contact position; and a test apparatus which is electrically connected to the make contact of the relay and is set up to check the contact position of the relay; wherein the test apparatus comprises a zero crossing detection circuit, which is set up to detect the zero crossing of a phase at the make contact of the relay.