Fixed valve-control type sealing lead-acid accumulator for fields of solar energy and wind energy

Abstract

The invention provides a fixed valve-control type sealing lead-acid accumulator for the fields of solar energy and wind energy. A pole plate comprises 1.2 to 2.5 mass percent of Sn and 0.1 to 0.3 mass percent of additive; an a value is 0.4 to 0.5 and a gamma value is 0.80 to 0.90g / cm<2>; the porosity of a baffle plate is between 92 and 94 percent, and the specific gravity is between 160 and 200g / mm.m<2>; and a part inside the accumulator at the position of a safety valve is provided with a catalyst, namely palladium or platinum, and the additive is superconductive carbon black of which the pHvalue is 8.5 and specific surface area (BET) is 1,000m<2> / g. The accumulator provided by the method not only greatly reduces floating charge currents, but also improves the heat resistant out-of-control capability to a great extent. The accumulator has high primary capacity and has over-long cycle life under remote and severe conditions, wherein the cycle life of 100 depth of discharge (DOD) percent can reach 900 times when the floating charge of 2.23 V is performed for 14 hours.

Description

technical field [0001] The invention relates to a valve-controlled sealed lead-acid battery, in particular to a battery used for energy storage in the field of solar energy and wind energy. Background technique [0002] With the development of the economy, the supply of traditional energy has gradually become tight, so new energy, especially environmentally friendly renewable energy, has become an indispensable part of future development. As an energy storage battery for long-term use of photovoltaic energy, its capacity and life are important factors that affect the full and economical application of these new energy sources. [0003] VRLA batteries used in the field of solar energy and wind energy are often located in remote areas. The battery is not only often discharged with a large current, but also often undercharged. At the same time, due to long-term use of the battery, insufficient capacity and thermal runaway have become important limiting factors for battery life....

AI Technical Summary

Problems solved by technology

[0007] Due to these intractable technical problems, there are few batteries used for energy storage in the field of solar energy and wind energy that can meet the above characteristics of use in the market.

Images