Splitting the Power battery cover plate of new energy vehicles and exploring the secrets of pressure relief protection

The new energy LFP safety cover set is the core component of the battery casing, mainly used to wrap and protect the internal structure of the battery, and adapt to various new energy batteries such as lithium batteries, lithium cobalt oxide batteries, nickel hydrogen batteries, etc. As a "protective barrier" for batteries, it needs to have sufficient strength and wear resistance to resist external environmental erosion and collision impact, and avoid internal structural damage; At the same time, it is necessary to have certain thermal conductivity to assist in battery heat dissipation and ensure stable operation of the battery within a reasonable temperature range. Aluminum cover plates have become the mainstream choice in the industry due to their excellent thermal conductivity and protective performance.

With the rapid iteration of the new energy vehicle industry, the performance requirements for Battery aluminum safety cover sets are constantly upgrading. On the basis of protection, functional integration is further strengthened to adapt to the battery needs of higher energy density and more complex usage scenarios. The sealed cover plate can effectively prevent internal electrolyte leakage and improve battery safety.

Among various types of new energy batteries, the Aluminum cover plate for batteries has the most complex and precise structure. It not only plays a key role in energy transmission, but also serves as the core carrier for explosion-proof and pressure relief. Its value is about twice that of the battery shell. The precision cover plate, with its high-precision component integration, can effectively ensure the stability of battery energy transmission.

The Lithium battery top cap is integrated with more than 10 components, including a cover plate body, positive and negative pole columns, injection holes, explosion-proof valves (explosion-proof plates), etc. The components work together to ensure the normal charging and discharging of the battery, while also undertaking the important mission of safety protection. Its precision directly determines the safety performance and service life of the battery, and the explosion-proof cover plate is the core configuration for high-end lithium batteries to achieve safety protection.

With the development of lithium batteries for new energy vehicles towards high volume and energy density, coupled with the increasingly harsh operating environment during vehicle operation, the safety hazards of sealed batteries causing explosions due to damage and abnormal internal reactions continue to increase. The safety protection of square lithium batteries is mainly divided into two levels: one is to prevent self functional damage caused by battery abuse, and the other is to avoid secondary safety hazards caused by battery explosions. The Prismatic lithium battery annex can prevent functional damage caused by battery abuse from the source, laying a solid first line of defense for battery safety.

For the latter, the mainstream protection methods in the industry are divided into circuit breaker protection and pressure relief protection. Among them, pressure relief protection, as a key means to directly deal with internal pressure abnormalities, is the core defense line to ensure battery safety, and pressure relief Prismatic lithium battery canopy is the core carrier to achieve this protection.

In power type high-capacity batteries, the square cells used in electric vehicles have different requirements for the structure and size of explosion-proof valves due to different vehicle models and installation spaces. Therefore, explosion-proof valves need to be customized according to actual scenarios. Customized Top lid for prismatic battery cells can accurately adapt to the installation needs of different vehicle models, improving the space utilization of batteries. However, while customization brings flexibility, it also leads to a low level of industry standardization, making it difficult to achieve uniformity in production processes.

At present, although domestic and foreign enterprises, universities, and research institutes have carried out a lot of research and development work in the field of Aluminum battery cover modules, the industry and relevant national management units have not yet issued a unified standard for the structure of explosion-proof valves. Therefore, when choosing an explosion-proof solution, it is necessary to make rational judgments based on the actual situation such as battery type, usage scenario, and performance requirements, in order to maximize the safety and reliability of the battery system. The adaptability of the square cover plate is particularly critical.

We can provide professional technical support and adaptation solutions for pressure relief protection and customized selection of Power battery cover plates. If you have any questions or intentions for cooperation, please feel free to contact us at any time to accurately meet your core needs.