Multifunctional power supply of vehicular automotive electronic device

Abstract

The invention relates to a multifunctional power supply of a vehicular automotive electronic device. The multifunctional power supply comprises a voltage detection module, a control module, controlled switches K1, K2 and K3, an auxiliary storage battery connected with the control module and a primary and auxiliary storage battery switch, wherein controlled ends of the controlled switches K1, K2 and K3 are connected with the control module, the first end of switch ends of the controlled switch K1 is connected with the anode of an automotive storage battery, the first end of switch ends of the controlled switch K2 is connected with the anode of the auxiliary storage battery, the first end of switch ends of the controlled switch K3 is connected to a power supply control end of the vehicular automotive electronic device, second ends of switch ends of the controlled switches K1, K2 and K3 are connected together, the auxiliary storage battery is connected with the vehicular automotive electronic device and the automotive storage battery in parallel through the controlled switch K2, one end of input ends of the voltage detection module is connected with an automotive electric switch, theother end thereof is connected between the controlled switch K2 and a power supply end, and the output end of the voltage detection device is connected with the control module. The invention realizesthat the vehicular automotive electronic device is not power off in the automotive ignition process and can effectively protect the automotive storage device and the vehicular automotive electronic device.

Description

【Technical field】 [0001] The invention relates to a power supply device, in particular to a multifunctional power supply of a vehicle electronic device. 【Background technique】 [0002] At present, vehicle-mounted electronic devices (including vehicle information system (driving computer), navigation system, car audio and TV entertainment system, vehicle communication system, Internet equipment, vehicle-mounted computer, etc.) are becoming more and more popular, and some have memory function. Picture 1-1 As shown, its power supply is supplied by the car battery or generator through the "power supply terminal (generally marked as BTT+)" and "power control terminal (generally marked as ACC)". When the car electronic device is a car audio, the "power supply terminal" and "power control terminal" refer to the "power supply terminal" and "power control terminal" of the car audio. When the car electronic device uses other equipment When the switch is turned off, it refers to the "...

AI Technical Summary

Problems solved by technology

[0003] There are the following disadvantages in the existing vehicle electronic device power supply mode: 1. At present, the vehicle electronic device is connected to the car battery in parallel through the power line and (or) power control line, and the car battery is also connected in parallel with the generator and the starter motor.

When the car is ignited, due to the large current when the starter motor is started and the internal resistance of the car battery, the voltage at the car battery terminal drops sharply, causing the on-board car electronic device to be powered off due to the low voltage of the power supply or the voltage at the power control terminal is too low. 2. The on-board automotive electronic device uses the electric energy of the car battery when the generator is not working. Some existing on-board automotive electronic devices have a time-limited shutdown function. It can continue to work. After the time limit is over, it will automatically shut down and then turn on the switch again. The on-board car electronic device can still be turned on, which cannot effectively protect the battery.

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