An energy storage unit equalization circuit and an energy storage system having the equalization circuit

Abstract

The invention discloses an energy storing unit balancing circuit and an energy storing unit with the balancing circuit. The balancing circuit is connected with an energy storing unit, comprising an information sampling circuit and an isolating DC-to-DC converter; when in charging and discharging, the state information of each energy storing unit in an energy storing system can be used for communicating through an energy and communication transmission conductor; a balancing module arranged in a microcontroller compares and processes the state information and performs balancing control so as to transfer the energy among the energy storing units through the energy and communication transmission conductors. With the adoption of the balancing circuit, the energy transfer and communication are performed in a form of a digital signal through the energy and communication transmission conductor, so that the simplicity and reliability of the circuit can be ensured while ensuring the mutual communication of single cells.

Description

technical field [0001] The invention belongs to the technical field of accumulators. Background technique [0002] Due to the limitation of single energy storage unit voltage, capacity, maximum current and other factors, most of the energy storage units use a series-parallel energy storage system to work in actual use, which is affected by the inconsistency of single energy storage units and environmental factors Affected by the impact of the energy storage system, there will be a phenomenon that a single unit falls behind. After a single unit falls behind, most of them will be replaced by the whole group, resulting in a lot of waste. [0003] In order to avoid the phenomenon of a single battery lagging behind, smart batteries with balancing functions have also appeared. By collecting the status information of each single battery, the balancing module in the microcontroller controls each battery to perform energy transfer. However, in the existing technical solutions, the s...

AI Technical Summary

Problems solved by technology

However, in the existing technical solutions, the single battery only collects the analog signal of the last single battery, and the single battery can only communicate with its adjacent single battery, but cannot communicate with all other single batteries. In actual use, the consistency between the single cells is still not guaranteed. In addition, for the current single cells that transmit analog signals, if a single cell needs to communicate with all other single cells, additional lines are required. This results in a complex circuit structure and reduces the reliability of the work.

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