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Independent photovoltaic storage battery grouping management method

A technology for battery packs and management methods, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as system reliability reduction, failure, and system replacement cost increase, and achieve the effect of avoiding recycling.

Inactive Publication Date: 2014-12-10
JIANGSU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Therefore, the battery has become the most vulnerable part of the photovoltaic system, and improper battery management methods will cause it to fail prematurely, resulting in an increase in system replacement costs and a decrease in system reliability

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  • Independent photovoltaic storage battery grouping management method
  • Independent photovoltaic storage battery grouping management method
  • Independent photovoltaic storage battery grouping management method

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] The principle of battery grouping is: after determining the total battery capacity according to the photovoltaic cell capacity and load demand, the batteries are grouped based on the discharge rate recommended by the manufacturer to control the discharge current of a single battery group to the load, so that each battery group is based on its rated capacity. When the current is discharged, it can meet the load demand alone. In this embodiment, the storage battery is divided into three groups, and when each battery group is discharged at its rated current, it can individually meet the load demand.

[0034] figure 1 It is a structural diagram of the independent photovoltaic storage battery system of the present invention. The system adopts DC bus structure, the bus voltage V DB Stable at 220V. After the photovoltaic array passes the ma...

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Abstract

The invention discloses an independent photovoltaic storage battery grouping management method, and belongs to the technical field of new energy power generation control control. The invention relates to an independent photovoltaic storage battery system, and the main components of the independent photovoltaic storage battery system comprise a photovoltaic battery, a storage battery, a power transformer, a load and the like. The independent photovoltaic storage battery grouping management method provided by the invention comprises the steps of collecting the limited photovoltaic electrical energy in a period of time to charge for a storage battery group, discharging as less as possible before the charging is full so as to enable the storage battery group to achieve a fullly charged state quickly, and circularly implementing the policy aiming at different groups. The independent photovoltaic storage battery grouping management method provided by the invention is suitable for the occasion that the photovoltaic electrical energy is continuously scant, so that each storage battery group breaks away from a long-term underfilling state, the duty-cycle operation is avoided under low charge state, and the service life of a storage battery is prolonged.

Description

technical field [0001] The invention relates to a group management method for independent photovoltaic storage batteries, which belongs to the technical field of new energy power generation control. Background technique [0002] Solar energy has random and intermittent characteristics. To achieve continuous and stable power supply for a stand-alone photovoltaic power generation system, necessary energy storage equipment is required. Batteries have the characteristics of low cost, convenient maintenance, and high charging and discharging efficiency, which make them a common energy storage method for photovoltaic power generation systems. [0003] At the same time, the charging and discharging of batteries used in photovoltaic power generation systems has some new features. When the battery is fully charged mainly depends on the environmental conditions (light intensity, ambient temperature, whether there is an object to block, etc.) After the battery is over-discharged, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 李春华曾庆军王玉龙章飞陈伟
Owner JIANGSU UNIV OF SCI & TECH
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