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Power lithium ion battery

A lithium-ion battery and power technology, applied in secondary batteries, battery pack components, circuits, etc., can solve the problem of difficulty in controlling voltage and capacity consistency, hindering production efficiency and pass rate, and confusing A/B winding core matching and other problems, to achieve the same production process and parameters, avoid the barrel effect, and achieve good flatness consistency.

Pending Publication Date: 2021-12-28
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, lithium-ion winding cores are mostly produced by winding and forming, and then A / B winding cores are paired to form batteries for production. Not only need to configure A / B winding machines separately, but also need matching machines for winding core configuration. , and A / B winding cores are prone to pairing confusion, quantity mismatch and other problems, which greatly hinder the improvement of production efficiency and pass rate, and verification affects production quality
[0003] Secondly, when multiple batteries form a module, the greater the number of individual batteries, the more difficult it is to control the consistency of the voltage and capacity of the module as a whole, and it is easy to have a "barrel effect", which seriously affects the entire battery module.

Method used

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Examples

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Embodiment 1

[0051] Such as Figure 1-5 A power lithium-ion battery shown includes a casing 1, a winding core set 2, a positive electrode connecting piece 7, a negative electrode connecting piece 8, a positive electrode cover plate 3 and a negative electrode cover plate 4, wherein:

[0052] The winding core group 2 includes a winding core 20 and a fixed bracket 21;

[0053] There are multiple winding cores 20 in the winding core group 2. In this embodiment, there are six winding cores 20, and the six winding cores 20 are placed in the fixed bracket 21 in turn. When the winding cores 20 are placed, all the winding cores 20 The positive tabs 200 face the same side, and all the winding cores 20 negative tabs 201 face the same side;

[0054] Specifically, the fixed bracket 21 includes a positive support rod 210, a negative support rod 211 and a plurality of separation rods 212, the positive support rod 210, the negative support rod 211 and a plurality of separation rods 212 are made of insula...

Embodiment 2

[0073] Such as Figure 6-9 As shown, the difference between this embodiment and the above-mentioned embodiments is that the side plate of the closed winding core 20 is composed of the side plate of the positive electrode cover plate 3, the negative electrode cover plate 4 and the fixing bracket 21, that is, the side plate of the closed winding core 20 The plate is formed by welding the positive cover plate 3 and the positive support rod 210 and the negative cover plate 4 and the negative support rod 211, that is, the casing 1 forms a closed cavity with the positive cover plate 3, the negative cover plate 4 and the fixing bracket 21, and the closed cavity For closing the core 20;

[0074] The advantage of this embodiment over the previous embodiment is that it facilitates the installation of the positive cover plate 3 and the negative cover plate 4. Before installing the positive connecting piece 7 and the negative connecting piece 8, the positive cover plate 3 and negative cov...

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Abstract

The invention discloses a power lithium ion battery. The power lithium ion battery comprises a shell, a roll core group, a positive electrode cover plate and a negative electrode cover plate, wherein the roll core group comprises a fixed support and a plurality of roll cores, the fixed support is provided with a plurality of placing grooves, the roll cores are placed in the placing grooves, the roll cores are in one-to-one correspondence with the placing grooves, positive electrode tabs of the plurality of roll cores are connected in series, and negative electrode tabs of the plurality of roll cores are connected in series; the positive electrode cover plate and the negative electrode cover plate are respectively fixed on two opposite sides of the roll core group and are used for wrapping the two opposite sides of the roll core group; the shell is arranged on the outer side of the roll core set and used for wrapping the roll core set. According to the battery disclosed by the invention, an A / B roll core pairing process is cancelled, so that waste caused by the problems of wrong roll core pairing, mismatched quantity and the like is avoided, and the product quality is greatly improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a power lithium ion battery. Background technique [0002] At present, lithium-ion winding cores are mostly produced by winding and forming, and then A / B winding cores are paired to form batteries for production. Not only need to configure A / B winding machines separately, but also need matching machines for winding core configuration. , and A / B winding cores are prone to problems such as pairing confusion and quantity mismatch, which greatly hinder the improvement of production efficiency and pass rate, and verification affects production quality. [0003] Secondly, when multiple batteries form a module, the greater the number of individual batteries, the more difficult it is to control the consistency of the voltage and capacity of the module as a whole, and it is easy to have a "barrel effect" that seriously affects the entire battery module. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0587H01M50/529H01M50/538
CPCH01M10/0525H01M10/0587H01M50/529H01M50/538Y02E60/10Y02P70/50
Inventor 黄立军杨中舒刘磊
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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