battery charging system
A battery and circuit technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of poor safety, low intelligence of battery charging system, and low control accuracy, and achieve the effect of prolonging life.
Active Publication Date: 2016-08-17
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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Problems solved by technology
[0002] A widely used battery charging system adopts a simple phase-controlled direct rectification form, resulting in low control accuracy, large output voltage fluctuations, large ripples, no electrical isolation between input voltage and output voltage, and poor safety
In order to overcome these problems, transformers are generally used to step down the power frequency AC power first, and then rectify the reduced AC power. Although this solves the problem of electrical isolation, the transformer has the disadvantages of large size and relatively heavy weight, which leads to the integration of the entire charging system. The temperature is low, and the transformer can generate large power frequency noise. In addition, the intelligence of the whole battery charging system is low.
Method used
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[0045] The present invention will be further described below in conjunction with the accompanying drawings. Firstly, the battery charging system of the first embodiment of the present invention will be introduced.
[0046] figure 1 It is a schematic circuit connection diagram of a storage battery charging system according to an embodiment of the present invention.
[0047] The battery charging system includes the main circuit. The main circuit includes a first rectifier circuit 1 whose input end is connected to an external power grid and is used to convert the input first alternating current into a first direct current and output the first rectifier circuit 1, the input end is connected to the output end of the first rectifier circuit 1 and is used to convert the first An inverter circuit 3 that converts a direct current into a second alternating current and outputs it. The input end is connected to the output end of the inverter circuit 3 and is used for voltage isolation of...
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The invention relates to a storage battery charging system which comprises a first rectifying circuit, an inverter circuit connected with the first rectifying circuit, a voltage isolating circuit connected with the inverter circuit, a second rectifying circuit connected with the voltage isolating circuit, a charging branch parallelly connected to the output end of the second rectifying circuit, an electric quantity detecting circuit connected with the charging branch, and a control circuit connected with the electric quantity detecting circuit and the inverter circuit. The control circuit is used for performing closed-loop adjusting on the output voltage and output currents of the charging branch so as to allow the output voltage and the output currents to be close or equal to respective preset target values. The output voltage and output currents of the system can be set to be close to the optimal preset values of the input voltage and input currents of a storage battery, and the service life of the storage battery is prolonged.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a storage battery charging system. Background technique [0002] A widely used battery charging system adopts a simple phase-controlled direct rectification form, resulting in low control accuracy, large output voltage fluctuations, large ripples, no electrical isolation between the input voltage and the output voltage, and poor safety. In order to overcome these problems, transformers are generally used to step down the power frequency AC power first, and then rectify the reduced AC power. Although this solves the problem of electrical isolation, the transformer has the disadvantages of large size and heavy weight, which leads to the integration of the entire charging system. The degree is low, and the transformer can generate large power frequency noise. In addition, the intelligence of the whole battery charging system is low. In particular, intelligent control of b...
Claims
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IPC IPC(8): H02J7/04
Inventor 魏培华杨奎魏文海杨格肖功彬刘长清赵清良李小平荣智林
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD