Method and system for charging a vehicle high voltage battery
AssigneeFord Global Technologies, LLC
InventorRichard Dyche Anderson
Life of this patent
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Abstract
A method and a system for charging a battery in hybrid vehicles and electric vehicles are provided. An amount of energy consumption for charging a battery is calculated by taking the sum of a first amount of energy for charging a high voltage battery and a second amount of energy for use by a low voltage auxiliary system during charging. An optimal charge current for a charger is determined based on a charging option. The charging option provides a set of desired charging parameters for a charger controller. A state of charge of the battery is determined within a state of charge range. The charger controller provides a charge current to the battery. The charge current is the optimal charge current up to a maximum charge current for the state of charge range of the battery.
Claims21
A method for charging a battery in one of a hybrid vehicle and an electric vehicle comprising:
- calculating an amount of energy consumption for charging a battery by taking the sum of a first amount of energy for charging a high voltage battery and a second amount of energy for use by a low voltage auxiliary system during charging;
- determining an optimal charge current for a charger based on a charging option, the charging option providing a set of desired charging parameters for a charger controller;
- determining a state of charge of the battery within a state of charge range;
- and
- controlling the charger using the charger controller to provide a charge current to the battery, wherein the charge current is the optimal charge current up to a maximum charge current for the state of charge range of the battery.
A battery charging system for an electrically powered vehicle having a rechargeable high voltage battery, the system comprising:
- a battery charger adapted to provide a charge current to the battery;
- and
- a battery controller configured to command battery charging at an optimal charge current based on low voltage power of the auxiliary system and resistance of the battery and representing a minimized amount of energy consumption to operate an auxiliary system while charging the battery.
A method for charging a vehicle battery comprising:
- calculating an optimal charge current generally defined by
- I
- HV
- =
- P
- LV
- R
- HV
- to minimize the amount of energy consumption by a battery, where IHV, is the current from the charger, PLV is the power of the low voltage auxiliary system, and RHV, is the resistance of the high voltage battery;
- and
- charging the battery at the optimal charge current up to a maximum charge current for the battery.
Dependencies are inferred from the claim text.