Charging module, DC (direct current) charging pile and control method of direct current charging pile
A technology of DC charging pile and charging module, which is applied in the direction of converting DC power input to DC power output, charging station, battery circuit device, etc., can solve the difficulty of resonant inductor and transformer design, and it is difficult to realize wide input and wide output adjustment problems, to reduce the design difficulty, optimize the resonant inductance and transformer, and improve the conversion efficiency.
Active Publication Date: 2019-11-12
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology
[0004] In view of this, the object of the present invention is to provide a charging module, a DC charging pile, and a control method for a DC charging pile, so as to solve the problem that the charging module based on LLC is difficult to design a resonant inductance and a transformer, and it is difficult to achieve wide input and wide output regulation. , wherein the specific technical scheme is as follows:
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[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0045] See figure 1 , shows a schematic structural diagram of a charging module provided by the present invention, which is applied to a DC charging pile. Such as figure 1 As shown, the charging module includes a rectifying module 11 , an LLC resonant module 12 and a chopping module 13 .
[0046] The input end of the rectification module 1...
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The invention provides a charging module, a DC (direct current) charging pile and a control method of the DC charging pile. The charging module comprises a rectification module, an LLC (logical link control) resonant module and a chopping module, wherein the rectification module is used for controlling stability of input DC voltage of the LLC resonant module, and the LLC resonant module adopts a fixed switching frequency control mode, therefore, output voltage of the LLC resonant module is fixed or is in a smaller change range, a resonant inductor and a transformer in the LLC resonant module are optimized, and the design difficulty of the resonant inductor and the transformer in LLC resonant circuits is reduced. The output voltage range of the LLC resonant module is adjusted by use of thechopping module, and finally, the output voltage range of the charging module is wider. The LLC resonant module is controlled in the fixed switching frequency open-loop control mode, so that fixed switching frequency can be set around the resonant frequency of the LLC resonant module, and the conversion efficiency of the LLC resonant module is improved.
Description
technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a charging module, a DC charging pile and a control method for the DC charging pile. Background technique [0002] DC charging pile is currently the preferred method for fast charging of electric vehicles. A DC charging pile can be composed of one or more charging modules. Among them, the greater the power of the DC charging pile, the more charging modules are required. For example, a 120kW DC charging pile can be composed of six 20kW charging piles connected in parallel. [0003] At present, the charging module in the DC charging pile usually adopts a two-stage high-frequency isolation topology. Common charging module topologies include: pre-stage VIENNA rectifier + post-stage phase-shifting full bridge, pre-stage VIENNA rectifier + post-stage LLC full-bridge resonant conversion Circuit, pre-stage VIENNA rectifier + post-stage LLC half-bridge resonant convers...
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Login to View More IPC IPC(8): B60L53/31B60L53/60H02J7/06H02M3/335
CPCB60L53/31B60L53/60H02J7/06H02M3/3353Y02T10/70Y02T10/7072Y02T10/72Y02T90/12
Inventor 王新宇陶磊庄加才张杰吴云
Owner SUNGROW POWER SUPPLY CO LTD