The rapid growth of the electric vehicle market, power battery pack security and Stability become particularly important. Among them, waterproof technology is one of the key factors to ensure the performance and service life of power battery pack. This article will discuss the current situation and future development trend of electric vehicle power battery pack waterproof technology.

1. Importance of waterproof technology
   the power battery pack is usually installed in the bottom or trunk of electric vehicles and is easily affected by rain, mud and other external environmental factors. If the power battery pack cannot be effectively waterproof, it will lead to moisture, short circuit and corrosion of battery components, thus affecting the performance and safety of the whole battery system. Therefore, the waterproof technology of power battery pack is crucial.

2. Current waterproof technology
   at present, the waterproof technology of electric vehicle power battery pack mainly includes the following aspects:

   • sealing design: efficient sealing design and materials are adopted to ensure that battery pack of the shell and connecting parts can effectively block the intrusion of moisture and dust.
   • Waterproof coating: apply waterproof coating on the surface of battery pack shell to improve the overall waterproof performance by battery pack.
   • Drainage Design: set drainage device at the bottom of battery pack to remove rainwater and water in time to avoid short circuit and corrosion caused by internal retention in battery pack.
   • Intelligent monitoring system: through the installation of humidity sensor and intelligent monitoring system, timely monitor the internal humidity of battery pack, and discover potential waterproof problems in advance.

3. Future Development Trend
   with the continuous progress of electric vehicle technology, the waterproof technology of power battery pack will also usher in a new development trend:

   • new waterproof materials: With the development of material science, new materials with more waterproof performance will appear, such as waterproof coating with self-healing function and efficient disposable silverware set.
   • Intelligent waterproof system: future electric vehicles may adopt intelligent waterproof system to monitor and adjust the waterproof status of battery pack in real time through sensors and intelligent control units, thus improving waterproof performance and reliability.
   • Formulation of waterproof standards: the automotive industry may formulate stricter power battery pack waterproof standards to ensure stable performance and safety of electric vehicles in various harsh environments.

The waterproof technology of electric vehicle power battery pack is the key factor to ensure the safety and stable performance of the battery system. At present, various automobile manufacturers and technology suppliers are continuously improving waterproof technology to improve the reliability and safety of electric vehicles. In the future, with the development of materials science and intelligent technology, the waterproof technology of power battery pack will usher in more innovations, providing more reliable power guarantee for the development of electric vehicles.