Current collector, pole piece, electrochemical device and current collector manufacturing method

• Main Author: YAN JIAXIAO
• Format: Patent
• Language: Chinese; English
• Published: 06.02.2024
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BASIC ELECTRIC ELEMENTS; ELECTRICITY; FIRE-FIGHTING; HUMAN NECESSITIES; LIFE-SAVING; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention discloses a current collector, a pole piece, an electrochemical device and a current collector manufacturing method. The current collector includes a support layer, a first metal layer, and a second metal layer. The supporting layer comprises a first surface and a second surface which are oppositely arranged. The first metal layer is connected to the first surface. The second metal layer is connected to the second surface. The supporting layer is configured to expand when the temperature of the current collector reaches a preset temperature so that the distance between the first metal layer and the second metal layer can be increased, heat transmission between the first metal layer and the second metal layer can be blocked, and the short circuit position between the first metal layer and the second metal layer can be blocked. The preset temperature is 120-150 DEG C, so that the risk of influencing normal use of the electrochemical device is reduced, heat transmission can be blocked in time, a sh