How do you prevent lithium-ion batteries from coating darkness?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

1. To ensure the consistency of coating, it should be paid to the change in the viscosity of the slurry, the change in the height of the hopper, changes in the coating speed; 2, the thin layer of the slurry on the aluminum foil into the oven dry, remove NMP Solvent (NMP boiling point 202 ¡ã C, flash point 95 ¡ã C). Drying is too slow, the surface of the coating is fluidity, the thickness is unstable, the drying is too fast, the surface forms a PVDF film layer, and the internal NMP solvent volatilizes can cause the surface layer to wrinkle, in order to ensure the average evaporation of NMP, usually use segmented drying, The highest temperature in the middle section.

The positive electrode is generally 100-130 ¡ã C, if the aqueous system is used, the drying temperature is generally 75-90 ¡ã C; and the drying process NMP volatilizes, the composition of the coating paste is constantly changing, so the amount of NMP solvent of the slurry, temperature rise The mode and heating time have an effect on this; The active substance will be peeled off, thereby causing short circuit in the battery. In addition, the drying temperature and drying time are not appropriately caused by aluminum foil oxidation and polarity polarity; 4, coating and drying should be the first three inspection - thickness, quality, size meet the requirements, and test the corresponding pulp on time Speed, baking time, gap, etc. Explanation of dark laces of coating strips: Darkness is due to coating, the surface portion of the polar surface is uneven, the color difference occurs, and the appearance is dark.

The difference in thickness is might be (1) due to the blade of foreign matter or the surface of the knife in the slurry (have a gap), causing a phenomenon that the surface thickness of the pole surface is uneven; (2) after the roller pressure or the roller pressure Linear traces. Due to the particles that are not open due to the knife, or a small dry slurry card is caused on the kn.

CONTACT US
Just tell us your requirements, we can do more than you can imagine.
Send your inquiry
Chat with Us

Send your inquiry

Choose a different language
English
العربية
Deutsch
Español
français
italiano
日本語
한국어
Português
русский
简体中文
繁體中文
Afrikaans
አማርኛ
Azərbaycan
Беларуская
български
বাংলা
Bosanski
Català
Sugbuanon
Corsu
čeština
Cymraeg
dansk
Ελληνικά
Esperanto
Eesti
Euskara
فارسی
Suomi
Frysk
Gaeilgenah
Gàidhlig
Galego
ગુજરાતી
Hausa
Ōlelo Hawaiʻi
हिन्दी
Hmong
Hrvatski
Kreyòl ayisyen
Magyar
հայերեն
bahasa Indonesia
Igbo
Íslenska
עִברִית
Basa Jawa
ქართველი
Қазақ Тілі
ខ្មែរ
ಕನ್ನಡ
Kurdî (Kurmancî)
Кыргызча
Latin
Lëtzebuergesch
ລາວ
lietuvių
latviešu valoda‎
Malagasy
Maori
Македонски
മലയാളം
Монгол
मराठी
Bahasa Melayu
Maltese
ဗမာ
नेपाली
Nederlands
norsk
Chicheŵa
ਪੰਜਾਬੀ
Polski
پښتو
Română
سنڌي
සිංහල
Slovenčina
Slovenščina
Faasamoa
Shona
Af Soomaali
Shqip
Српски
Sesotho
Sundanese
svenska
Kiswahili
தமிழ்
తెలుగు
Точики
ภาษาไทย
Pilipino
Türkçe
Українська
اردو
O'zbek
Tiếng Việt
Xhosa
יידיש
èdè Yorùbá
Zulu
Current language:English