hao battery

This paper discusses the photovoltaic systems use energy storage characteristics of VRLA batteries, Hp laptop battery photovoltaic power generation systems affect the storage life of VRLA batteries factors, and describes the development of energy storage VRLA batteries as well as in the application of photovoltaic power generation system.

Key words photovoltaic system VRLA battery energy storage

1 Introduction

China's vast western region has abundant natural resources, offers enormous potential for development. But because of environmental and economic reasons for the relative backwardness of the dual, where a considerable lack of electricity, to develop the economy and improving people's lives caused by certain barriers. Is being implemented in the "bright work" using the characteristics of the western region with plenty of sunshine through the solar photovoltaic system, solar energy directly into electrical energy to satisfy people's demand for energy.

Photovoltaic power generation system batteries include nickel-cadmium batteries now, and lead-acid batteries, including nickel-cadmium batteries are gradually being phased out. Lead-acid batteries including flooded and depleted liquid type, the early solar photovoltaic power generation system generally used flooded lead-acid batteries, which during use is accompanied by mist generated pollute the environment. The VRLA (VRLA) battery until the last 10 years, poverty in China's developed liquid-type lead-acid batteries, because it has no need of additional acidic water, no acid fog precipitation, HP Presario 2100 Battery(compaq 2100 Battery), HP Presario 2500 Battery(compaq 2500 battery), HP Presario NX9010 Battery, can be arbitrarily placed on the use, handling convenience, the use of clean, etc., in recent years in photovoltaic power generation systems have been widely used.

Photovoltaic power generation system using two batteries working conditions

In the photovoltaic power plant using the environment during the day, solar cell module to receive sunlight, the output power,HP Presario 2100 Battery part of DC and AC load of work, another part of the supply and battery charging; night or rainy days, solar components do not work, battery-powered , supply DC or AC load, the battery is in a cycle of state, therefore, in this use of the environment, the battery life cycle life.

The batteries used in PV systems in the working conditions and batteries used in different working conditions on other occasions. The main differences can be summarized as the following:

(1) charge rate is very small, the average charge current is usually I50~ I100Few reach I5~ I10.

(2) The discharge rate is very small, usually C/20-C/240, or smaller.

(3) due to natural resource constraints, battery only when there is sunlight in order to charge: the charge time is limited.

(4) can not be given the charge according to the laws of the battery to recharge.

Three photovoltaic power generation system performance requirements for VRLA batteries

Photovoltaic power generation system in charge of the battery frequently - the repeated cycle of discharge, HP Presario 2500 Battery due to the instability of sunlight, over-chargeElectrical and deep-discharge adverse situations have occurred, coupled with photovoltaic power generation system used mostly in the western region, elevation above in 2500M. Therefore, the photovoltaic power generation system in the battery has the following requirements:

(1) has a deep-cycle discharge performance, charge-discharge cycle life long;

(2) resistance to overcharge ability;

(3) Cross-discharge capacity recovery after the strong;

(4) Good charge acceptance;

(5) The battery in a static environment, when used in the electrolyte is not easy layering;

(6) has a maintenance-free or with little maintenance performance;

(7) should have a good high-temperature charge-discharge characteristics;

(8) can adapt to high altitude (elevation above all 2500M) region, HP Presario NX9010 Battery, the use of environment;

(9) battery in the battery good consistency.

National standard "GB/T19064-2003 domestic solar photovoltaic power system technical requirements and test methods" HP Presario 2100 Battery(compaq 2100 Battery), HP Presario 2500 Battery(compaq 2500 battery), HP Presario NX9010 Battery, on the battery requirements are as follows:

(1) deep-cycle lead-acid batteries are used in domestic solar photovoltaic power system of choice for products.

(2) consecutive rainy days in accordance with local conditions designed to minimize battery capacity. The design of deep-cycle lead-acid battery depth of discharge (DOD) 80%, light cycle lead-acid battery design depth of discharge (DOD) to 50%.

(3) When the sealed lead-acid battery at an altitude of 2500m above conditions, when used must be battery manufacturer to confirm the battery is suitable for use in these conditions.