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High-capacity lithium battery liquid injection method

A liquid injection and high-capacity technology for lithium batteries, which is applied to battery pack components, circuits, electrical components, etc., can solve the problems of affecting the consistency of liquid injection, excessive water absorption of the battery, and poor battery performance, so as to shorten the time of liquid injection, Prevent gas leakage and improve battery performance

Inactive Publication Date: 2019-08-09
颍上北方动力新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional battery injection time is too long, causing the battery to absorb too much water. At the same time, the high vacuum will draw out part of the electrolyte, affecting the consistency of the injection, which will eventually lead to poor battery performance and affect the use of the battery.

Method used

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  • High-capacity lithium battery liquid injection method

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Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 Shown, a kind of high-capacity lithium battery injection method, comprises method steps as follows:

[0025] a. Use the vacuum pump 1 to evacuate to a certain degree of vacuum and keep it for 60-120s;

[0026] b. Inject dry protective gas to 0.4Mpa-0.5Mpa and keep for 60-120s;

[0027] c. Inject the electrolyte in the liquid injection tank 2 into the lithium battery through the liquid injection port 14 at the bottom of the liquid injection tube 5, and let the lithium battery stand for 100-600s.

[0028] The degree of vacuum drawn by the vacuum machine 1 in step a can be -0.75Mpa∽-0.85Mpa.

[0029] The degree of vacuum drawn by the vacuum machine 1 in step a can be -0.75Mpa∽-0.85Mpa.

[0030] The degree of vacuum drawn by the vacuum machine 1 in step a can be -0.85Mpa∽-0.90Mpa.

[0031] The degree of vacuum drawn by the vacuum machine 1 in step a can be -0.85Mpa∽-0.90Mpa.

[0032] The degree of vacuum drawn by the vacuum machine 1 in step a can be -...

Embodiment 2

[0036] Such as figure 1 As shown, the liquid injection equipment based on a high-capacity lithium battery liquid injection method in Embodiment 1 includes a vacuum machine 1, a liquid injection tank 2 and a liquid injection pipe 5, and the bottom end of the vacuum machine 1 is fixedly connected by screws and nuts. There is a power supply 11, the upper surface of the power supply 11 is fixedly connected with the liquid injection tank 2 and the heating pipe 8, the heating pipe 8 is located on the outer surface of the liquid injection pipe 5, and one end of the liquid injection tank 2 is fixedly connected with a connecting pipe 6, and the connecting pipe 6 is far away from the injection pipe. One end of the liquid tank 2 is provided with an air injection hole 7, and the bottom end of the liquid injection tank 2 is fixedly connected with a connecting pipe 3, and one end of the connecting pipe 3 is fixedly connected with a pump 4, and the vacuum pump 1 is equipped with a pressure te...

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Abstract

The invention relates to a high-capacity lithium battery liquid injection method. The method comprises the following steps of: performing pumping to a certain vacuum degree by using a vacuum pumping machine, injecting a dry protective gas, injecting an electrolyte in an electrolyte injection tank into a lithium battery through an electrolyte injection port at the bottom of an electrolyte injectionpipe, and performing standing of the lithium battery. According to the high-capacity lithium battery liquid injection method, the pressure maintaining protection is continuously increased after vacuum supply to assist liquid drainage in a condition of high pressure or high vacuum so that the liquid injection time of the liquid injection battery can be greatly shortened under the condition of thesame liquid maintaining amount to facilitate improvement of the performances of the battery cell, the internal portion of the liquid injection pipe is gradually pumped to be a vacuum state by employing the vacuum pumping machine, the vacuum pumping machine is provided with a pressure tester, and according to the pressure data displayed by the pressure tester, the dry protective gas is injected through a gas injection hole under different pressures, and it is ensured that the injected liquid cannot cause temperature change due to the temperature change of the outside under the action of the heating pipe.

Description

technical field [0001] The invention relates to the technical field of liquid injection for lithium batteries, in particular to a liquid injection method for high-capacity lithium batteries. Background technique [0002] Lithium-based batteries are divided into lithium batteries and lithium-ion batteries. Lithium-ion batteries are used in mobile phones and laptops, commonly known as lithium batteries. Batteries generally use materials containing lithium elements as electrodes, which are representatives of modern high-performance batteries. However, real lithium batteries are rarely used in daily electronic products due to their high risk. Lithium-ion batteries were first successfully developed by Sony Corporation of Japan in 1990. It is to embed lithium ions in carbon (petroleum coke and graphite) to form a negative electrode (traditional lithium batteries use lithium or lithium alloys as negative electrodes). LixCoO2, LixNiO2, and LixMnO4 are commonly used as positive e...

Claims

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Application Information

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IPC IPC(8): H01M2/36
CPCH01M50/60Y02E60/10
Inventor 张颜青
Owner 颍上北方动力新能源有限公司