High-capacity energy storage device

Abstract

The invention discloses a high-capacity energy storage device, comprising a plurality of tandem battery packs, a plurality of balancing units and a plurality of cell measuring and controlling units, wherein each battery pack comprises a plurality of tandem single batteries; each balancing unit is provided with a plurality of balancing modules; each battery pack is connected with one battery measuring and controlling unit and one balancing unit correspondingly; each balancing module is connected with one single battery; the balancing units are connected with the battery measuring and controlling units by buses and used for balancing electric quantity among the battery packs; the balancing modules are used for balancing electric quantity among the single batteries in the battery packs; and the battery measuring and controlling units are used for measuring and controlling the state of each single battery in the battery packs. The high-capacity energy storage device can prolong the service life of the batteries and give full play to energy storage functions of the batteries. The high-capacity energy storage device provides effective management and monitoring for large-scale energy storage devices.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a large-capacity energy storage device using a lithium-ion battery as an energy storage power source. Background technique [0002] Large-scale power storage technology is a key technology for smart grids, wind power generation, solar power generation, and power load shifting. Lithium batteries have been widely used in many fields due to their high energy density, low self-discharge rate, stable discharge voltage, no memory effect, and long cycle life. In order to ensure good battery performance, prolong battery life, and achieve efficient and safe applications, the battery must be managed and controlled reasonably and effectively. With the application of lithium batteries in large-scale energy storage occasions, battery management technology has become a key technology for large-scale energy storage of lithium batteries, which is an important guarantee for safe and effic...

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