Method for improving roller sticking of negative electrode of lithium ion battery during rolling

• Main Authors: ZHOU DEQING, WANG YONGJUN, WANG XIUXIANG, ZHANG QIANBING, SU XIAOLIU
• Format: Patent
• Language: Chinese; English
• Published: 27.03.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a method for improving roller sticking of a negative electrode of a lithium ion battery during rolling. The method comprises: slurry selection, wherein selected slurry viscosityis controlled to be 3000-8000mpa.s, the temperature is 23 to 27 DEG C, and the fineness is less than 35 microns; the consistency of the slurry can be kept before and after coating, stratification ofthe slurry is not resulted, and the slurry placement time of the buffer tank is less than or equal to 12 hours after compounding; coating speed control, wherein the negative electrode coating speed iscontrolled to be 35+/-10m/min; and oven interval setting, wherein the coating oven is divided into 1-19 intervals, the baking temperature is set into three stages during single-side coating, the airdraft frequency is set to be divided into five stages, the baking temperature is set into four stages during double-side coating, the air draft frequency is set into five stages, and the coated negative electrode is dried throug