Electric vehicle integrated DC charger, system and method
A technology for DC charging and electric vehicles, which is applied to electric vehicles, battery circuit devices, collectors, etc., can solve the problems of low nighttime utilization of chargers, large cabinets, and large average power, and achieve a charging combination mode Flexible, low stand-alone power, small floor space
Active Publication Date: 2017-07-18
SHANDONG LUNENG SOFTWARE TECH
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Problems solved by technology
[0005] Chinese patent CN 103904737 A proposes a charging scheme with one charge and two charges. This solution can only realize the output of a single gun. When one gun is working, the other gun cannot work;
However, this solution requires a large number of DC contactors to realize power expansion, and the cost is high, and the cabinet occupies a large area; after expansion, only two guns can be output, and the average power of a single gun is relatively large, which also causes chargers The problem of low nighttime utilization
It can be seen that this kind of charger has certain limitations in the construction of charging stations.
Method used
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Embodiment 1
[0064] Taking 4 chargers with a single power of 30KW as an example to form a group (but not limited to 4, multiple machines can be connected in parallel according to actual needs), the core technology of chargers to realize group parallel work is explained.
[0065] The non-polar parallel contactors are used to connect in sequence between each single busbar to form a loop, and the control system can control the closing and closing of the parallel contactors to realize the intelligent parallel operation of the charger. The main circuit components on the DC side are selected and designed according to the maximum current of 250A, and the shunts and fuses are placed outside the busbar to facilitate DC current collection, DC energy billing and circuit protection.
[0066] Such as figure 1 As shown, when all the parallel contactors are in the disconnected state, each unit in the group is an independent 30KW integrated charger, and 4 units can work at the same time; closing the paral...
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The invention discloses an electric vehicle integrated DC charger, system and method. Parallel contactors are used between the single machines to connect busbars of each single machine in sequence to form a loop. The control system controls the shutdown and closure of the parallel contactors. Realize intelligent load distribution of electric energy; the parallel contactor is placed inside the single machine, and its action is controlled by the single machine acquisition control module; The bus can be intelligently switched to the master control module of the power allocation charger through the intermediate relay for centralized control. The charging machine of the present invention has small single-unit power, small floor space, parallel operation within a group, intelligent load distribution of electric energy, easy realization of power expansion, low cost, flexible charging combination mode, low overall cost, and high utilization rate of charging modules.
Description
technical field [0001] The invention relates to an electric vehicle integrated DC charger, system and method. Background technique [0002] The crisis of traditional energy sources such as oil and coal continues to deepen, and the atmospheric environment continues to deteriorate. Energy conservation and emission reduction have become the main direction of future automotive technology development. Continuous breakthroughs in lithium-ion battery technologies such as lithium iron phosphate and modified lithium manganese oxide have opened up broad prospects for the popularization of electric vehicles. The subsequent construction of charging facilities is particularly important, and the construction of charging facilities needs a good operating model as a support. [0003] The charging station is equipped with a small energy storage station to store energy during the valley value of the power grid at night, and the operation plan of energy consumption during the peak period of t...
Claims
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IPC IPC(8): H02J7/04H02J7/02
Inventor 杨勇陈嵩胡勇童晓霖王立军杨军洲
Owner SHANDONG LUNENG SOFTWARE TECH