Patent ID: 11926224
Assignee: MIDTRONICS, INC.
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 0:
1. A maintenance device for coupling to a battery of an electric vehicle and performing maintenance on the battery, comprising:
a device housing;
a controller in the housing configured to control operation of the maintenance device;
a plurality of wire loading coils configured to apply a discharge load to the battery and comprising at least two wire loading coils electrically connected in series, each of the at least two wire loading coils connected in series has a maximum power rating above which the wire loading coil will melt and become an open circuit;
a switch arranged to selectively close and provide an electrical short circuit across a first one of the at least two wire loading coils connected in series; and
load control circuitry configured to selectively couple the at least two of the plurality of wire loading coils to the battery and further configured to close the switch if power through a second one of the plurality of wire loading coils exceeds the maximum power rating and open the switch if power through the first and second ones of the plurality of wire loading coils is less than the maximum power rating in response to an output from the controller.