Storage battery combination working method and storage battery combination working device

Abstract

The invention discloses a storage battery combination working device consisting of a plurality of monomer storage batteries or storage battery modules, a load capacitor, a plurality of storage battery charge and discharge controllers, a transformer and rectifier filter, a storage battery set monitor, a load discharge controller and a microprocessor. A storage battery combination working method is realized, so that the monomer storage batteries or the storage battery modules can be mutually isolated and can independently work after being grouped. Therefore, mutual influence of the monomer storage batteries or the storage battery modules after being grouped can be avoided, the service life of the storage battery set is prolonged, and the intrinsic high voltage source of the storage battery set can be avoided. The storage battery combination working device is convenient to implement and safe to use.

Description

technical field [0001] The invention relates to a storage battery combination working method and a storage battery combination working device, which belong to the technical field of storage battery grouping and storage battery balancing. Background technique [0002] In the existing storage battery grouping method, in order to meet the requirements of load current and voltage, the battery pack is obtained by combining the single batteries in parallel and in series, or using multiple single batteries in parallel and in series to obtain the battery pack. Battery modules, and then multiple battery modules are connected in parallel and connected in series to obtain a battery pack. Due to the current production technology and process limitations of the battery, the technical indicators of each single battery are poorly consistent. The modules interact with each other in the process of charging and discharging, making some batteries in the battery pack easy to overcharge or overdi...

AI Technical Summary

Problems solved by technology

[0002] In the existing storage battery grouping method, in order to meet the requirements of load current and voltage, the battery pack is obtained by combining the single batteries in parallel and in series, or using multiple single batteries in parallel and in series to obtain the battery pack. Battery modules, and then multiple battery modules are connected in parallel and connected in series to obtain a battery pack. Due to the current production technology and process limitations of the battery, the technical indicators of each single battery are poorly consistent. The modules interact with each other in the process of charging and discharging, making some batteries in the battery pack easy to overcharge or overdischarge, resulting in the working life of the battery pack being much shorter than that of the single battery or battery module, which is more important in the application of lithium-ion batteries. Common; in the existing technologies and solutions, a balance and measurement and control branch are connected in parallel to the two poles of each single battery in the series group, and the series connection is made under the monitoring and control of the microprocessor and the measurement and control branch. The external characteristics of the single batteries in the battery tend to be consistent, so as to improve the life of the series battery pack; It will still affect the life of the entire series-connected battery pack, and when the battery pack has an accident, it is necessary to cut off the high-voltage output. Although the high-voltage output can be cut off by closing the output terminal of the battery pack, since the battery pack uses High-voltage output, so although the high-voltage output of the battery pack is cut off, the internal high-voltage source of the battery pack still exists, which is not safe enough in practical applications, especially in the application of electric vehicles

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