Overlapped type lithium ion battery

Abstract

The invention discloses an overlapped type lithium ion battery which comprises positive pole pieces, negative pole pieces, isolating members and positive and negative pole ears, wherein the positive pole pieces and the negative pole pieces are stacked in a staggering manner; the isolating members are arranged among the positive pole pieces and the negative pole pieces; output pole ear foils which are fixedly connected with the positive and negative pole ears are respectively arranged on each positive pole piece and each negative pole piece; at the same time, at least one connecting pole ear foil is formed on at least two positive pole pieces or at least two negative pole pieces; and the up and down corresponding connecting pole ear foils are fixedly connected to fixedly connect the corresponding positive pole pieces and negative pole pieces. According to the overlapped type lithium ion battery, by fixedly connecting the positive pole pieces and the negative pole pieces through the connecting pole ear foils, the overall stability of the positive pole pieces and the negative pole pieces is improved, the reliability of the battery is improved, the service life of the battery is prolonged, and the safety performance of the battery is improved; and by effectively fixing pole groups at the upper and lower ends or on the left and right sides, compared with the ordinary stacked battery, the overlapped type lithium ion battery has great improvement on reliability and safety performance and is beneficial for the popularization of a power battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a stacked lithium ion battery with stable structure. Background technique [0002] At present, lithium-ion batteries have the incomparable advantages of other energy storage batteries, such as high energy density, light weight, and good safety performance. It has also been widely used in bicycles and electric vehicles, and it is also very attractive for military fields such as aerospace, aviation, and field operations. [0003] For conventional laminated batteries, because of their inherent defects, the positive and negative electrodes are in a relatively free state. During the use of the battery, especially when bumping, the relative position between the positive and negative electrodes will occur. Changes, and even the phenomenon that the negative electrode cannot cover the positive electrode, which will shorten the service life of the battery and even cause the ...

AI Technical Summary

Problems solved by technology

[0003] For conventional laminated batteries, because of their inherent defects, the positive and negative electrodes are in a relatively free state. During the use of the battery, especially when bumping, the relative position between the positive and negative electrodes will occur. Changes, and even the phenomenon that the negative electrode cannot cover the positive electrode, which will shorten the service life of the battery and even cause the battery to explode.

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