Power source device for boat

Abstract

To maintain stabilized operation of a boat engine, a propulsion device may be provided with two separate batteries for different uses in case one of the batteries suffers a voltage drop. A power source device is provided with a propulsion battery for supplying power to engine-related components of an outboard motor and an auxiliary battery for supplying power to boat accessories. An anomaly time power supply circuit is connected to the power supply route of the propulsion battery and the power supply route of the auxiliary battery. Electric power from the auxiliary battery is supplied to the engine-related components when the charged voltage of the propulsion battery lowers below the charged voltage of the auxiliary battery, so that power to the engine-related components is supplemented in order to maintain stabilized operation of the engine.

Description

PRIORITY INFORMATION [0001] This application claims priority from Japanese Patent Application No. 2004189639, filed Jun. 28, 2004, the entire contents of which is hereby incorporated by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates to a power source device for supplying power to a propulsion device on a boat, such as, for example, an outboard motor. [0004] 2. Description of the Related Art [0005] Boats often have two batteries for different operations and requirements of the boat's propulsion and auxiliary power needs. A large capacity battery is used for the supplying power to the engine and other engine components, such as the starting motor, ignition device, etc. The large capacity battery is used to initiate operation of the engine by turning the starting motor and operating the ignition devices to start an internal combustion engine, for example. A smaller capacity battery is also used for supplying power to peripheral dev...

AI Technical Summary

Benefits of technology

[0008] Accordingly, disclosed herein is a power source device that is capable of providing a continued stabilized driving state of the propulsion device by supplementing the power of one battery with the power of another battery should a voltage drop occur in the first battery.

Problems solved by technology

Because most propulsion devices employ a fuel injector, interruption of electric power to the fuel injector may prevent fuel from being injected into the engine, which may cause the engine to stop operating.

If a voltage drop occurs in the propulsion battery or a wire breaks in the battery power supply circuit while the engine is in operation, power supply to the engine is provided by the generator, which may lead to instability of the power source and failure of the engine should the generator be unable to consistently provide the required power.

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