Cell insulation material: the safety cornerstone of new energy batteries
In today's rapidly changing new energy battery technology, cell insulation materials, as a key element to ensure the stable operation and safe use of batteries, are receiving more and more attention. It is not only directly related to the performance of batteries, but also an important support for the sustainable development of the new energy industry.
With the wide application of new energy vehicles and energy storage equipment, the requirements for core insulation materials are becoming more stringent. Traditional PET blue film used to be a common material for cell insulation, and occupied an important position in the past battery manufacturing with its good chemical resistance, tensile strength and insulation properties. However, The Times are developing, technology is advancing, the emergence of a new generation of power battery structures such as CTP, CTB, CTC, and the application of 800v high voltage fast charge technology, so that the short board of PET blue film is gradually exposed. Its PSA back adhesive has limited bonding performance, and it is easy to fall off and peel off in the face of external impact of the battery pack. And at high voltage, the breakdown resistance voltage of PET blue film is difficult to meet the requirements, and it has been unable to meet the development needs of new energy battery technology.
Under this background, a new type of cell insulation material came into being. For example, UV coated insulation materials, with its excellent performance advantages, become the new darling of the industry. The UV coating material seamlessly integrates with the battery to protect the battery in all aspects and effectively prevent the risk of short circuit and thermal runaway. Its curing speed is extremely fast, spraying and curing only a few seconds, greatly improving production efficiency, and requires less labor and energy. In addition, the UV coating material has a high recovery rate and is more environmentally friendly. In addition, PC insulating sheets, silicone elastomer insulating sheets, etc., also play an important role in the field of new energy batteries. The PC insulation sheet has the characteristics of insulation, flame retardant, fire prevention and high efficiency resistance, acting as an insulating material between the cell to prevent short circuit, and its flame retardant performance can also slow down the spread of fire when the battery is thermal out of control; The silicone elastomer insulation sheet has high thermal conductivity, super voltage resistance and other properties to meet the thermal insulation needs of new energy vehicle batteries and electronic packaging applications.
From the perspective of market pattern, major enterprises have laid out the field of cell insulation materials. Ningde Times, BYD and other lithium battery leading enterprises actively transition from blue film tape to paint, Matsui shares, Jinritai, Nippon and other brands are also in the new energy power battery paint market. In the future, the core insulation materials will develop in the direction of high performance, environmental protection and low cost, and continue to escort the take-off of the new energy industry.