Lithium power battery clustering system and management method thereof

Abstract

The invention relates to a lithium power battery clustering system and a management method thereof, which can be used for the discharging and charging control of a power lithium battery pack. The system comprises a central controller and plural parallel lithium battery modules, wherein each lithium battery module comprises plural serial monomer lithium batteries; each monomer lithium battery is configured with a relay which causes the monomer lithium battery to be accessed into a serial loop; and the input control end of each relay is connected with a module processor. Each monomer lithium battery is accessed into the circuit at the most proper time according to state data collected by the module processor and the order of the central controller; and the discharging process for the lithium battery to output outwards and the charging process for adsorbing external circuit energy can be realized by a bidirectional current path so as to obtain the optimal working state of the monomer battery and prolong the service life of the battery to be almost as long as that of the monomer battery.

Description

technical field [0001] The invention relates to a lithium power battery cluster system and a management method thereof. Background technique [0002] Compared with traditional batteries, lithium batteries have the advantages of large capacity-to-volume ratio, multiple charge-discharge cycles, and no need to consider the placement direction of solid-state batteries. At present, lithium batteries are gradually becoming the first choice for batteries in systems that require strong electric power. Due to its own structural characteristics, it is difficult for lithium batteries to achieve high voltage and high current output. That is to say, a single lithium battery cannot output large power. At present, a single lithium battery is mainly used in mobile phones, small electric tools, etc. [0003] In order to give full play to the advantages of lithium batteries, lithium batteries must be connected in parallel and in series to form a battery pack to achieve the required power req...

AI Technical Summary

Problems solved by technology

During the working process of series lithium batteries, due to individual differences (such as internal resistance, output voltage, etc.), the power output is unbalanced

This imbalance causes the low-quality batteries in the series circuit to have a large working loss, and under extreme conditions, it may cause fatal overcharge or overdischarge, which seriously affects the life of lithium batteries.

[0004] At present, the single charge and discharge experiments of lithium batteries have proved that the charge and discharge times of single lithium batteries can reach 3000 times or more under the working conditions (mainly limit the charge and discharge current and voltage), while in the case of series connection, lithium batteries The battery pack generally can only work around 500 cycles

Damage caused by imbalance is the most important factor affecting battery life

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