Positive plate and battery

• Main Authors: LIANG GUANGLIN, LI SULI, FANG JIALIN, WANG FENG
• Format: Patent
• Language: Chinese; English
• Published: 02.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to the field of batteries, in particular to a positive plate and a battery, and the positive plate comprises a current collector with a first surface and a second surface which are oppositely arranged in a first direction, and a bottom coating which is coated on the first surface and/or the second surface of the current collector; the positive electrode active material coating layer is coated on the bottom coating layer; wherein the first surface comprises a first region provided with a groove structure and a second region except the first region, the current collector located in the second region is a flat part, and the ratio of the area S2 of the second region to the area S1 of the first region is greater than or equal to 0.1 and less than or equal to 0.5. The first thickness H2 covers the first surface, the second thickness H3 covers the groove structure, and the first thickness H2 and the second thickness H3 meet the condition that H2 + H3 is larger than or equal to 2 micrometers and