Automatic series and parallel changing equalizing charger for electric vehicle accumulator

Abstract

The charging device includes charging socket, charger, charging plug, accumulators connected to each other in series. The charging device also includes convertor composed of DC relays. Number of DC relay is less than one of the numbers of accumulators. The DC relays possess dual sets of normal open and normal close contacts. Connection wire is built in the charging plug. Through connection wire built in the charging plug, winding in DC relay obtains power. When being electrified, relays attract accumulators so as to convert series connection to parallel connection. Features are: compact circuit design, very few electronic parts and components, safety and reliable so as to prolong service life of accumulators in use for electric motor cars more than one time.

Description

Technical field: [0001] The invention relates to a charging device, in particular to a charging device for an electric vehicle. Background technique: [0002] Electric vehicles powered by power batteries are considered to be a green project in the 21st century, and their appearance has brought the development of the automobile industry into a new field. At present, my country's electric vehicle industry is booming at an unprecedented speed. However, the service life of electric vehicle batteries is too short (usually half a year to one year), which seriously hinders this development like a roadblock, and causes a great waste of manpower and material resources at the same time. The reason is that the battery is usually not used up, but charged by the charger. The most important reason is the fundamental defect in the charging technology of electric vehicles, which prevents the batteries from being charged in a balanced manner, resulting in some "undercharging" and some "ove...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an ideal charging device to solve the charging problem of the battery of the electric vehicle mentioned above. It can ensure that when the electric vehicle is running, the state of the original batteries connected in series in the battery pack remains unchanged, and it will never affect the charging of the electric vehicle. When charging, as long as the charging plug of the charger is inserted into the charging socket of the electric vehicle for charging, the batteries of the battery pack will immediately switch from the original series connection to the parallel connection state.

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