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An anti-dendrite battery device with electrode rotation

A battery device and electrode technology, applied to secondary batteries, secondary battery repair/maintenance, circuits, etc.

Active Publication Date: 2020-10-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the action of the motor and the gearbox, the positive and negative cylinders rotate in reverse, the positive cylinder rotates counterclockwise, and the negative cylinder rotates clockwise, which will not cause turbulence in the electrolyte and solve the problem of lithium dendrites generated during the negative charging process. question

Method used

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  • An anti-dendrite battery device with electrode rotation
  • An anti-dendrite battery device with electrode rotation
  • An anti-dendrite battery device with electrode rotation

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Embodiment Construction

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] combined with figure 1 The operation flow of an anti-dendrite battery device with electrode rotation is illustrated as follows:

[0024] S1 opens frequency conversion motor (14), and motor shaft (12) rotates counterclockwise, and motor outer shaft belt pulley (11.1) and motor inner shaft belt pulley (11.2) also rotate counterclockwise. The inner shaft belt pulley (11.2) of the motor drives the inner shaft belt pulley (10.2) to rotate counterclockwise through the transmission belt (15), and drives the inner shaft (7) and the rotating inner cylinder (3) to rotate counterclockwise.

[0025] ...

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Abstract

The invention discloses an anti-dendritic battery device with electrode rotation and relates to the field of battery testing. A variable frequency motor drives a rotating shaft to rotate through a transmission belt, and drives positive and negative electrodes to rotate at the same time. The positive electrode rotates clockwise, and the negative electrode rotates counterclockwise, which drives an electrolyte to flow, uniformizes the concentration of lithium ions in the electrolyte, reduces the concentration polarization and prevents the negative electrode from generating lithium dendrites during charging. Two cylinders have the same rotational speed in opposite directions, forming convection, reducing the flow rate of the electrolyte and weakening the turbulence caused by the rotation of the electrolyte cylinders. The rotational speed of the positive and negative electrodes can be adjusted according to the charging and discharging rate. The rotational speed is high when the charging current is high; on the contrary, the rotational speed is low when the charging current is low. The battery device can effectively prevent the generation of the lithium dendrites, improves the performance of a lithium battery and is simple in structure and convenient and quick to install and maintain.

Description

technical field [0001] The invention relates to the technical field of chemical batteries, in particular to an electrode rotation preventing dendrite battery device. Background technique [0002] For a lithium battery with a metal lithium sheet as the negative electrode, the surface of the metal lithium sheet is very smooth at the beginning. After many times of charge and discharge, a dendritic metal lithium will form on the surface, called a dendrite. When charging a lithium battery, lithium ions in the electrolyte are transferred from the positive electrode of the battery to the negative electrode of the battery. The ion concentration is not uniform. When lithium ions are reduced to metal lithium by electrons on the surface of the negative electrode of the battery, due to concentration polarization, the distribution of the reduced metal lithium is uneven, so lithium dendrites are formed. The growth of lithium dendrites will lead to the instability of the electrode and ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42
CPCH01M10/4214Y02E60/10
Inventor 李钒王道德侯海元安振涛白帆
Owner BEIJING UNIV OF TECH
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