Lithium Battery Top Plate Cover Disassembly-Explore the Secret of Pressure Relief Protection
New energy lithium battery top plate cover refers to the plate-like material used to cover new energy batteries. It is usually used to wrap and protect the battery shell. It can be used for various types of new energy batteries. Such as lithium batteries, lithium cobalt oxide batteries, nickel metal hydride batteries, etc. New energy battery top plate usually need to have a certain strength and wear resistance to protect the internal structure of the battery from the external environment and collision. At the same time, it also needs to have a certain thermal conductivity to help the battery dissipate heat. With the rapid development of new energy vehicles, new energy battery top plate covers are also constantly being improved and innovated to meet changing needs.
Structure of Lithium Battery Top Plate
The structure of lithium battery top plate is complex and precise. It is responsible for energy transmission and explosion-proof pressure relief. Its value is about twice that of the shell. Composed of more than 10 components, it mainly consists of the top plate, positive and negative poles, injection holes, battery safety vents etc. The intricate and precise structure of the lithium battery top plate cover is a testament to the technical sophistication involved in its design and production.
Safety of Lithium Battery Top Plate Cover
As the size of lithium batteries for new energy vehicles increases, the energy becomes higher. And the use environment becomes more severe, the hidden danger of explosion caused by damaged sealed batteries is also increasing. There are two levels of safety for square lithium batteries. One is to prevent the battery from being abused and causing damage to the battery’s functions. And the other is to prevent safety hazards caused by battery explosion. At present, prismatic lithium battery safety vents usually have two types: circuit breaker protection and pressure relief protection.
Pressure Relief Protection
Today, we are going to delve into the crucial aspect of pressure relief protection. This involves setting an safety vent on the battery’s sealed shell and cover. When the internal pressure of the battery reaches the threshold, the safety vents will be burst open. The internal gas will be released to the outside, and the battery will be depressurized. This is a critical safety measure that cannot be overstated in its importance.
Among the hard shell structural parts, the cover plate has rich functions. The explosion-proof plate is the main safety component with strict sensitivity indicators. Generally, the top plate cover of the lithium iron phosphate system battery adopts a single safety vent design. And the opening pressure of the battery venting is generally 0.4-0.8MPa. When the internal pressure increases and exceeds the opening pressure of the lithium battery vents, the safety vents of prismatic cells will burst from the notch and open to release pressure.
For power-type large-capacity batteries, the square cells used in electric vehicles are also different. Because square batteries need to cope with the use of different spaces, lithium battery venting must be customized according to different needs. However, behind the high flexibility is the low degree of standardization, and it is difficult to achieve uniformity in technology. At present, domestic and foreign companies, universities, and research institutes have carried out a lot of work on the top cover module. But so far, the industry and relevant national management units have no unified standards for the structure of ev battery safety vents. Therefore, when choosing a suitable battery bursting disk solution, it is necessary to make rational judgments based on actual conditions and needs to ensure the safety and reliability of the battery system. The weight of these decisions cannot be underestimated.
Hejustamping-Prismatic Lithium Battery Top Plate Cover Stamping Manufacturer
Dongguan Heju Precision Electronic Technology Co., Ltd. specializes in manufacturing safety vents of prismatic cells and battery top plate covers for new energy vehicles. As one of the pioneering companies in China to develop and produce ev battery safety vents, we offer a wide range of models with comprehensive specifications. Our single pressure range can reach 0.03MPA, with CPK exceeding 2.0. With a robust technical R&D team, we actively collaborate with customers in developing new products. We have obtained three major management system certifications – ISO9001, ISO14001, and IATF16949. With a daily production capacity in the millions, we are well-equipped to meet your production needs.