Parallel current sharing circuit of charging module of electric automobile charger
A charging module and technology for electric vehicles, applied in electric vehicles, battery circuit devices, circuit devices, etc., can solve problems affecting the industrialization and application of electric vehicle chargers, output current low-frequency oscillation, and limit overall performance, etc., to achieve high reliability performance and maintainability, high accuracy of current sharing, and the effect of avoiding output voltage rise
A charging module and technology for electric vehicles, applied in electric vehicles, battery circuit devices, circuit devices, etc., can solve problems affecting the industrialization and application of electric vehicle chargers, output current low-frequency oscillation, and limit overall performance, etc., to achieve high reliability performance and maintainability, high accuracy of current sharing, and the effect of avoiding output voltage rise
CN102710000AActive Publication Date: 2012-10-03CHINA ELECTRIC POWER RES INST +1
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[0042] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0043] The block diagram of a parallel current sharing circuit of a charging module of an electric vehicle charger in this embodiment is as follows: figure 1 As shown, the charger monitoring unit is connected in parallel with at least one charging module; the charging modules are connected in parallel; the charger monitoring unit is connected to the charging module through a communication signal line; the charging modules are connected through an average current signal line; The charging module is respectively connected to the AC terminal of the power grid and the DC terminal of the power battery of the electric vehicle. The main functions of the monitoring unit are: on the one hand, collect relevant data of each charging module and upload them to the charging station monitoring system; on the other hand, receive and exe...
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The invention provides a parallel current sharing circuit of a charging module of an electric automobile charger, comprising a charger monitoring unit and at least one charging module which are connected in parallel, wherein the charging modules are linked in parallel; the charger monitoring unit is connected with the charging modules through communication signal lines; and the charging modules are connected through average current signal lines, and connected with a grid alternating current end and a power battery direct current end of the electric automobile respectively. By using the current sharing circuit disclosed by the invention, the sampling feedback coefficient of the output voltage of the module is adjusted according to the differential value between a module charging current sampling signal and average current signals of all the parallel modules, thus the charging voltage and the charging current of the module are further adjusted to reach the purpose of load-sharing current in parallel of every charging module. The parallel current sharing circuit has relatively high current sharing precision and current sharing dynamic responding speed, is beneficial to improving the reliability and the maintainable performance of the charger and better satisfies the charging requirement of the power battery of the electric automobile.
Description
technical field [0001] The invention relates to the field of electric vehicles, in particular to a parallel current sharing circuit of a charging module of an electric vehicle charger. Background technique [0002] As a new type of transportation, electric vehicles have incomparable advantages in alleviating the energy crisis and promoting the harmonious development of the environment and human beings. The construction of charging facilities such as charging stations is the premise and foundation for the healthy development of the electric vehicle industry. A typical electric vehicle charging station mainly includes power supply system, charging system, monitoring system and civil engineering and other auxiliary facilities. Among them, the charging system of the charging station mainly includes AC charging piles and off-board chargers, which are the core equipment of the charging station. [0003] Electric vehicle charger (i.e. non-vehicle charger) refers to a special devi...
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Patent Timeline
03 Oct 2012
Publication
CN102710000A
- IPC
- H02J7/10
- Inventors
- 陈良亮; 许晓慧