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Cooling device for liquid injection of lithium ion battery and liquid injection method

A cooling device, lithium ion technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problem of increasing the risk of quality control in the battery storage process, increasing the storage pressure in the temporary storage area of ​​the battery, and the difficulty of injecting liquid or electricity into the battery. Core injection and other problems, to achieve the effect of shortening the injection time, stable injection, and low cost of transformation

Active Publication Date: 2022-08-05
WUHU ETC BATTERY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether it is the end of baking or the end of chemical aging, the battery cells are at a relatively high temperature, that is, there is a positive pressure inside the battery cells, which makes it difficult to inject liquid into the battery cells or spray liquid into the battery cells. The current conventional method is to stand still before liquid injection Let the batteries spontaneously ignite and cool down for a period of time, which will produce the following inevitable disadvantages: 1. Reduce the production efficiency of the batteries; 2. Increase the storage pressure in the temporary release area of ​​the batteries in the liquid injection room; 3. Increase the Quality control risks in the storage process of batteries

Method used

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  • Cooling device for liquid injection of lithium ion battery and liquid injection method
  • Cooling device for liquid injection of lithium ion battery and liquid injection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A 30Ah lithium iron phosphate aluminum shell cell was used as the experimental sample cell, and 48 cells just finished baking were selected for the experiment at a time.

[0036] The specific steps of the experiment are as follows:

[0037] 1. Put 48 cells into the cooling shell 1, and insert the temperature-sensing wire probe into the liquid injection hole of each cell (make sure that the probe is inserted into the upper end of the cell to hang in the air, and does not touch other components of the cell, and then Use tape to fix the temperature sensing wire on the outside), the temperature sensing wire is connected to a multi-channel thermometer, and the initial temperature inside the cell is measured to be 92 ℃ ~ 98 ℃; the condensate water pipe of the fixture is circulated with condensed water, where the condensed water is the temperature The ice water of about 0 ℃ ~ 5 ℃ is condensed for 30 ~ 35 minutes, and the internal temperature of the lithium ion battery drops to...

Embodiment 2

[0044] A 135Ah lithium iron phosphate cell was used as the experimental sample cell, and 48 cells just finished baking were selected for the experiment at a time.

[0045] The specific steps of the experiment are as follows:

[0046] 1. Put 48 cells into the cooling shell 1, and insert the temperature-sensing wire probe into the liquid injection hole of each cell (make sure that the probe is inserted into the upper end of the cell to hang in the air, and does not touch other components of the cell, and then Fix the temperature-sensing wire with tape outside), connect the temperature-sensing wire to the multi-channel thermometer, and measure the initial temperature inside the cell to be 100-110 °C; circulate the condensed water in the condensed water pipe of the fixture, wherein the condensed water is about It is ice water at 0°C to 5°C, and it is condensed and left for 30 to 45 minutes. After standing, the internal temperature of the lithium-ion battery drops to 45 to 50°C.

...

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Abstract

A cooling device and a liquid injection method for liquid injection of lithium ion batteries belong to the technical field of liquid injection of lithium ion batteries. A plurality of lithium-ion batteries are stored in the body, and a condenser tube is wound around the cooling shell. The water inlet end of the condenser tube is connected to the water outlet of the chiller through the water pump I, and the water outlet end of the condenser tube is connected to the water inlet of the chiller through the water pump II. The liquid injection method of the present invention uses the above-mentioned cooling device to carry out primary liquid injection, chemical aging and secondary liquid injection in sequence. The beneficial effect of the present invention is that the overall structure of the cooling device in the present invention is simple, the transformation cost is low, and the lithium-ion battery can be accelerated. In addition, the traditional liquid injection method is adjusted in combination with the cooling device, so that the liquid injection is more stable, the efficiency of the liquid injection of the battery core is improved, and the quality of the battery core is improved.

Description

technical field [0001] The invention relates to the technical field of liquid injection of lithium ion batteries, in particular to a cooling device for liquid injection of lithium ion batteries and a liquid injection method. Background technique [0002] Lithium-ion battery is a secondary battery that can be repeatedly charged and discharged. It is composed of cathode and anode plates, separators, electrolytes, mechanical parts and other main components. During the whole life cycle of lithium-ion cells, especially in the process of researching cell production and manufacturing, liquid lithium-ion cells need to be filled with liquid after baking and chemical aging. However, whether it is the end of baking or the end of chemical aging, the cells are at a relatively high temperature, that is, there is a positive pressure inside the cells, which makes it difficult to inject liquid or spray liquid into the cells. The current conventional practice is to stand before injection. Al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/613H01M10/6556H01M10/6563H01M10/6569H01M10/0525H01M50/609
CPCH01M10/613H01M10/6556H01M10/6569H01M10/6563H01M10/0525Y02E60/10
Inventor 徐红飞
Owner WUHU ETC BATTERY LTD
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