High-frequency and low-frequency complementary efficient and energy-saving charger

Abstract

The invention provides a high-frequency and low-frequency complementary efficient and energy-saving charger. The high-frequency and low-frequency complementary efficient and energy-saving charger includes an input filtering module, a low-frequency transformer, a high-frequency switching power supply, a relay, a sampling module, a low-frequency changeover switch, an isolation driving optocoupler and a main control module; on the one hand, the output end of the input filtering module is connected with the input end of the high-frequency switching power supply, and on the other hand, is connected with one end of the switch part of the low-frequency changeover switch; the other end of the switch part of the low-frequency changeover switch is connected with the input end of the low-frequency transformer; the output end of the low-frequency transformer is connected with the first throw point of the switch part of the relay; and the common end of the switch part of the relay is connected with a charging output port. Based on high-frequency and low-frequency complementation, the high-frequency and low-frequency complementary efficient and energy-saving charger has a high-current charging auxiliary startup function, can meet requirements of the CEC in energy consumption authentication, can bear high-current charging startup in a short time and has high impact resistance.

Description

technical field [0001] The invention relates to a storage battery charger, in particular to a high-low frequency complementary high-efficiency energy-saving charger. Background technique [0002] Generally, the output of traditional battery chargers is mainly completed by high-frequency charging or low-frequency charging alone. Traditional low-frequency chargers can meet high-current charging but have low efficiency and cannot meet the requirements of CEC certification for energy consumption certification in the American market. Traditional high-frequency chargers are efficient. Although it is high, it cannot withstand high current charging or auxiliary start of the car. The low frequency does not meet the energy consumption certification CEC. The high frequency cannot have the function of high current output auxiliary start. [0003] CEC certification is the Appliance Efficiency Regulation implemented by the California Energy Commission on February 30, 2005. The purpose of...

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Problems solved by technology

[0004] Aiming at the defects in the prior art, the purpose of the present invention is to provide a high-low frequency complementary high-efficiency energy-saving charger. The present invention uses high-frequency and low-frequency automatic complementary conversion technology to charge, and realizes low-frequency transformer under the condition of low load efficiency. Automatically switch high frequency to charge the battery, otherwise, it will automatically enable low frequency to quickly charge the battery when it is fully loaded or high current starts

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