Jaguar Land Rover Limited

Jakub Mikos

Kevin Cockings

Fernando Lages

Stephen Pickering

Krzysztof Slosarczyk

A method for determining the charge in a battery which comprises providing a main battery and a auxiliary battery. The method then comprises connecting the main battery to an electrical load; measuring I, the current drawn from the main battery while it is connected to the electrical load; connecting the auxiliary battery in parallel with the main battery and the electrical load; measuring I, the current drawn from the main battery while it is connected to the electrical load and the auxiliary battery; and estimating the state of charge in the auxiliary battery based upon at least the difference between Iand I.

Method for determining the charge in a vehicle battery

A method for controlling an electrical system in a vehicle. The electrical system () comprises: at least a first switch (ES) arranged such that operating the switches will isolate a part of the electrical system; and a control unit, the control unit being arranged to operate the switches. The method comprises: putting the control unit into a first operational mode, the first operational mode comprising at least a first arrangement of switches; receiving a request to enter a second operational mode, the second operational mode comprising at least a second arrangement of switches; determining the priority of the first and second operational modes at least in part by consulting a database of operational modes and their priorities; switching the control unit into the second operational mode if the second operational mode has a higher priority than the first operational mode; and continuing in the first operational mode otherwise.

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Coventry, United Kingdom

Jakub Mikos