Distributed heat balance storage charging device and charging method thereof

Abstract

The invention discloses a distributed heat balance storage charging device and a charging method thereof. The distributed heat balance storage charging device comprises a flow battery stack, a converter, and a circulation loop for flow battery electrolyte flowing through a transformer coil in the converter. The circulation process of the electrolyte in the flow battery flows through the internal flow path of the transformer coil in the converter to ensure direct cooling of the most heat-producing components under the condition of minimum thermal resistance; high-efficiency and low-resistance cooling is carried out on the converter without additional work, the waste heat generated in the operation of the converter can preheat the electrolyte to improve the operation efficiency of the battery, and cooperative complementary operation of the converter and the flow battery is achieved under the premise without additional work. At the same time, the charging device as a whole can play a roleof peak load regulation when being charged at the night or idle time through a power grid to reduce the charging cost, and can also be directly charged by renewable energy sources with intermittent and volatility problems such as solar energy and wind energy to reduce the difficulty of grid integration of the renewable energy sources.

Description

technical field [0001] The invention relates to a charging device and a charging method, in particular to a distributed heat balance storage charging device and a charging method thereof. Background technique [0002] With the continuous development of new energy utilization technology, new energy vehicles have ushered in great development in the world, especially in China. With the dual support of technology and policy, my country's new energy vehicles, especially pure electric vehicles, continue to grow at a rate of nearly 300,000 per year. The emergence of a large number of pure electric vehicles means that my country's demand for charging piles and charging and swapping stations is increasing. At present, the ratio of domestic charging facilities to new energy vehicles is maintained at about 1:4, which is far from the standardized 1:1. Far. According to the "13th Five-Year Plan", it is estimated that by 2020, the number of centralized charging and swapping stations will...

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Problems solved by technology

[0005] However, the energy efficiency of the flow battery is relatively low during the cycle. Experiments have proved that an appropriate increase in temperature can improve the working efficiency of the battery. At the same time, the heat dissipation technology of the charging pile has always affected the efficient, stable and long-term operation of the charging device.

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