Generally, the minimum battery for electric vehicles is 12v, and the maximum battery is above 48v. The voltage of the mobile phone battery charger is 4.2v Direct charging will charge the mobile phone battery. If the inverter is used to invert the voltage of the battery of the electric vehicle into the mains voltage of 220v, the mobile phone charger can charge normally.

You need to connect a 48V to 5V voltage converter to charge your mobile phone. The price is about 15 yuan.

Electric vehicles generally have four batteries, the voltage is 48V, and the voltage of common mobile phone chargers is 5V. It is not feasible to directly charge the mobile phone, which will burn out the power supply of the mobile phone, so a 48V to 4V converter needs to be added in the middle.

Electric pressure transducer

Voltage/current conversion, that is, V/I conversion, is to convert the input voltage signal into a current signal that satisfies a certain relationship. The converted current is equivalent to a constant current source with adjustable output, and its output current should be stable and not change with the load. Generally speaking, the voltage-current conversion circuit is realized by negative feedback, which can be current series negative feedback or current parallel negative feedback. It is mainly used in industrial control and many sensor applications.

The device is shown in the figure.

You can buy a cigarette lighter socket and USB socket component directly and install it.

When installing cigarette lighters and USB sockets, the battery voltage used by electric vehicles should be considered first. If the battery voltage is 24V or 12V, you can directly purchase 24V or 12V cigarette lighter socket and USB socket components for direct installation. If the battery voltage is higher than 24V, you need to use LM7824 three-terminal regulator to reduce the battery voltage to 24V, and then install the components connecting the cigarette lighter socket and USB socket.

The cigarette lighter is a part of all cars, which is used to light the ignition source of cigarettes when the owner smokes. Lighters are used to light cigarettes. But we often say that the cigarette lighter is powered by the power supply! Some manufacturers produce lighters that are not used to light cigarettes, but only used to get electricity from cars! This kind of cigarette lighter is also called cigar head.

Supplement: the power supply is generally 12V DC (different models may be different), the middle elastic head is positive, and the two side buckles (ears) are negative. It is directly connected with the battery used in the car, and the current and power are the same as those of the battery.

References:

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