Power supply system
AssigneesKabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha
InventorsShuji Tomura, Masanori Ishigaki, Naoki Yanagizawa, Masaki Okamura
Life of this patent
Estimating the term…
Abstract
An operation mode selection unit selects an efficiency priority mode for minimizing the overall loss in a power supply system based on a load request voltage obtained in accordance with the condition of a load and on the conditions of DC power supplies, and generates a mode selection signal in accordance with the selection result. When SOC and/or output power have/has reached power supply restriction values in any DC power supply, an operation mode modification unit generates a final mode selection instructing signal so as to modify selection of the efficiency priority mode by the mode selection signal to select an operation mode in which power distribution between the DC power supplies can be controlled.
Claims17
A power supply system, comprising:
- a load;
- an electric power line connected to said load;
- a plurality of DC power supplies;
- a power converter connected across said plurality of DC power supplies and said electric power line;
- and
- a control device configured to control an operation of said power converter,
- said power converter configured to include a plurality of switching elements and to operate with one operation mode among a plurality of operation modes being applied, in said plurality of operation modes, power conversion between said plurality of DC power supplies and said electric power line being performed in different manners,
- said control device including
- a request voltage setting unit configured to set a request voltage for an output voltage output by said power converter to said electric power line in accordance with an operating condition of said load,
- an operation mode selection unit configured to select a first operation mode in which a power loss in said power supply system is minimized from an operation mode group in which said power converter can output an output voltage more than or equal to said request voltage among said plurality of operation modes, and
- an operation mode modification unit configured to, when at least one of SOC and input/output power of any DC power supply among said plurality of DC power supplies has reached a restriction value, select, from said operation mode group, a second operation mode in which power distribution between said plurality of DC power supplies can be controlled, in replacement of said first operation mode.
Dependencies are inferred from the claim text.