High-capacity lithium ion battery module

Abstract

The invention discloses a high-capacity polymer lithium ion battery module, belonging to the field of lithium ion batteries, wherein the module is of a two-stage balanced parallel connection structure. The battery module is formed by connecting a plurality of battery units in parallel, equivalent circuit structures and same resistors are arranged from each battery unit to a module output end. Each battery unit is formed by connecting a plurality of battery monomers which are packaged with resin, no locator card, slot and the like are arranged inside each battery unit, and heat-radiating channels among the battery monomers are naturally formed based on borders obtained after monomer resin packaging, so that a favorable thermal balance is achieved while the mechanical strength of the batteries is effectively guaranteed. Ventilating ports are arranged on the upper part and the lower part of the battery module, and bus bars, positive output polar columns, negative output polar columns and a battery monitoring system are arranged on the upper parts of the battery units. The battery module in such a structure has high specific energy, and the dynamic balance of the monomers in the module is good during energy output. Meanwhile, the high-capacity polymer lithium ion battery module has the advantages of simple structure and high mechanical strength, can meet requirements on high impact and vibration of the battery module, and has the capacity reaching 2,000-10,000Ah.

Description

Technical field: [0001] The invention relates to the battery field, in particular to a large-capacity lithium-ion battery module. Background technique: [0002] At present, with the shortage of fossil energy and the increasing pressure of environmental pollution, lithium-ion batteries, as one of the emerging green energy sources, are increasingly favored by the fields of energy storage and vehicle power, and their market share is also increasing. At the same time, it also has a good application prospect in the field of military equipment to replace traditional power supplies. With the expansion of lithium-ion batteries in the application field, the application of lithium-ion battery cells and modules gradually develops from small capacity and small scale to large capacity and large-scale direction, and the capacity of single cells develops from below five amp hours to hundreds of amps. For more than one hour, the scale of use has also developed from a few batteries in serie...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of using a large number of small-capacity battery cells in parallel to form a large-capacity lithium-ion battery module, a large number of battery cells and a large number of connection points are required. The dynamic balance between the battery cells is poor, so the performance varies with the prolongation of the use time

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