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Novel efficient solar cell charging system and control method

A technology of solar cells and control methods, applied to battery circuit devices, current collectors, electric vehicles, etc., to achieve high-efficiency electric energy utilization, realize electric energy utilization, and improve use efficiency

Active Publication Date: 2012-07-04
NINGBO INTELLIGENT MFG IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the technical problems of low efficiency and short life of the above two independent photovoltaic power supply systems and improve the conversion efficiency of PV cells, the present invention provides a new type of high-efficiency solar cell Charging system and control method

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  • Novel efficient solar cell charging system and control method
  • Novel efficient solar cell charging system and control method
  • Novel efficient solar cell charging system and control method

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] This embodiment is to apply the present invention to an independent photovoltaic power supply system. Please refer to image 3 , the DC-DC module connected to the solar battery charging system of the present invention is composed of a step-up circuit DC-DC1 and a step-down circuit DC-DC2 connected in parallel, and the step-up circuit DC-DC1 supplies power to the inverter through the DC bus, and the drop Voltage circuit DC-DC2 charges the storage battery, and the two circuits can work independently or simultaneously for MPPT control. DC-DC3 is a battery discharge circuit, and the DC-AC inverter module is an inverter connected to an AC load.

[0039] In the new independent photovoltaic power supply system, the PV battery only needs DC-DC1 boost and DC-AC inverter control to supply power to the load, without the battery; the battery s...

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Abstract

The invention discloses a novel efficient solar cell charging system and a control method. The system comprises a photovoltaic cell, a booster circuit, an inverter circuit, a voltage reduction circuit, a discharging circuit and a storage cell; the photovoltaic cell, the booster circuit and the inverter circuit are connected in turn; the photovoltaic cell, the voltage reduction circuit, the storage cell, the discharging circuit and the inverter circuit are connected in turn; and the inverter circuit is connected with a load. The system has the advantages that: (1) the inverter circuit is connected in parallel to separate the charging power of the storage cell from the load power of a user so as to improve the service efficiency of the photovoltaic cell; (2) the system consists of two direct current buses, wherein the high-voltage direct current bus is supplied to load an inverter and the low-voltage direct current bus is supplied to charge the storage cell; (3) efficient electrical energy utilization is realized by designing nine power conversion control modes, mode switching paths and conversion rules; and (4) the system and the control method thereof can be used for a photovoltaic off-grid power generation system, a BIPV system or a small-size wind off-grid power generation system.

Description

【 technical field 】 [0001] The invention relates to the field of photovoltaics, in particular to a novel high-efficiency solar battery charging system and a control method. 【 Background technique 】 [0002] An independent photovoltaic power supply system is generally composed of solar cells, batteries, photovoltaic controllers and inverter power supplies, with a power range of 1kVA to 5kVA. According to the charging and discharging management method of the battery, the main structure of the independent photovoltaic power supply system without power frequency transformer has the following two methods: [0003] (1) Interactive: such as figure 1 , the solar cell is controlled by MPPT through the DC-DC module, and the charging and discharging of the battery is managed by the bidirectional DC-DC module. The disadvantage is that two-stage conversion is required before the PV battery can charge the battery, which reduces the system efficiency; [0004] (2) Online: such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02J7/35
CPCY02E10/566Y02A30/60Y02E10/56
Inventor 王宏张东来
Owner NINGBO INTELLIGENT MFG IND RES INST
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