How many ways are there to cool the battery? (Lithium battery with NMP solvent as auxiliary material) Listen to what the doctor has to say~
Jul 7, 2022
Follow me on:
- The rapid development of the new energy industry is inseparable from the continuous upgrading of battery technology and the stable supply of raw materials. Zesheng, which focuses on NMP solvent (N-methylpyrrolidone), is one of the raw material production suppliers; our company has been supplying NMP solvent to lithium battery manufacturers for more than 10 years. Welcome to listen to our story. What the editor shared with you today is a Ph.D.Chris Tighe who specializes in batteries, motors, and drives, and his insights on battery cooling methods. Looking forward to your continued reading:
Ph.D. Chris Tighe shares with us the different battery cooling methods that automakers are using. I believe that many battery researchers are more concerned about this, what is the best way to cool the battery pack? Ph.D.Chris Tighe compared 3 methods of cooling a 21700 battery, listed below:
- ➡ Bottom cooling
- ➡ Side cold (half side)
- ➡ Side cold (full face)
It can be seen from the figure that the battery is cooled from different positions, and the heat distribution is also different. Due to the structure of the cells inside the cell, the difference in thermal conductivity between the axial and radial directions is obvious: the thermal conductivity in the axial direction is about 100 times higher than that in the radial direction. Therefore, although the axial length is much greater than the radial thickness, the effect of cooling the small bottom is roughly the same as cooling the entire side.
However, for batteries with larger diameters, due to the increased distance between the battery surface and the center of the battery, only side cooling cannot successfully cool the battery. Such as Tesla’s large diameter 4680 battery.
Anastasios A. Vasilopoulos, a director of industrial energy efficiency from the new energy industry, replied: If a hollow tiny cylindrical space can be prepared along the core, evacuated and added with a drop of pure H2O (or methanol), the Allows heat to be transferred quickly and continuously on one side of the cylinder (top or bottom), eliminating the need for additional cost heat pipes. Do you agree with me?
Ph.D. Chris Tighe says the idea is useful. Here’s what he has to say: “The fluid needs to evaporate and condense at the right temperature, which will be much lower than water, so choosing the right fluid is important. It has to be conductive! Orientation matters too. .This works best when the cooling surface is on top (i.e. reverse the battery).”
There are also many netizens who have researched on this and have left messages to Ph.D.Chris Tighe. Let’s take a look at these collisions of ideas.
Cooling the battery requires the use of a conductive medium, such as water, which allows the battery to cool faster. As an indispensable auxiliary material in the production of batteries, NMP solvent also plays a major role in the stability of battery performance. Perhaps many battery manufacturers do not need to use NMP solvent, but use H2O (water); some battery manufacturers think that NMP solvent is an environmentally unfriendly product.
What Zesheng’s team wants to say is that the existence of a thing must have its rationality. Manufacturers that use NMP solvents to make batteries still account for a large part of the market, which shows the value of NMP solvents. In addition, in order to protect the environment and protect the health of employees, our team has also developed NMP recovery system, which is specially used to match the production process of the battery factory.And the collecting rate can be reached at 99%. Therefore, welcome to contact with us for more about the NMP recovery solutions.
