Battery System
Contact Us
How to do lithium battery waterproof process
2023-08-16
The lithium battery waterproofing process is a comprehensive process designed to protect the safety and reliability of the battery by physical and chemical means to prevent water from invading the inside of the battery. Here are some of the main steps and methods for waterproof FREY Lithium batteries:
1. Waterproof consideration in the design phase
Seal design:
When designing lithium batteries, the use environment and waterproof needs should be fully considered, and the sealing structure should be reasonably designed. Common sealing structures include O-ring, sealant and so on.
The selection of suitable sealing materials, such as rubber, silicone, etc., these materials have good elasticity and water resistance, and can effectively prevent water penetration.
Shell selection:
Choose a shell material with waterproof properties, such as a shell made of waterproof material or a shell treated with a waterproof coating.
Ensure the strength and toughness of the housing to resist external shock and vibration while maintaining water resistance.
2. Waterproof measures in the production process
Coating technology:
The surface of the lithium battery is coated with a layer of waterproof materials, such as polyurea paint, fluorinated polymer paint, etc. These coatings can effectively prevent moisture penetration, providing an additional layer of protection for the battery.
The coating should be uniform, continuous, no bubbles, cracks and other defects to ensure the waterproof effect.
Sealant use:
During assembly, a sealant is used to make a secondary seal of the battery. The sealant can fill the gaps and holes in the battery housing, effectively preventing water from entering the battery interior.
Choose a high quality sealant with water resistance and corrosion resistance to ensure its long-term effectiveness.
Waterproof film application:
A waterproof film is covered on the surface of the lithium battery to provide additional waterproof protection. The waterproof film is usually made of polymer or coating agent, and has characteristics of water resistance and chemical corrosion resistance.
The waterproof film should be tightly fitted to the surface of the battery without wrinkles, bubbles and other defects to ensure its waterproof effect.
Professional waterproof shell:
For lithium batteries that need to be used in underwater or humid environments, professional waterproof shells can be used for packaging. The waterproof shell effectively prevents the intrusion of moisture and humidity by completely encapsulating the lithium battery inside the sealable shell.
The waterproof shell should have a high degree of water resistance and be able to protect the lithium battery in extreme environments.
4. Testing and verification after waterproofing
Immersion test:
Place the lithium battery in a certain depth of water for a period of time to observe whether water penetrates into the battery. This is one of the important ways to evaluate the waterproof performance of lithium batteries.
Spray test:
The spray device is used to spray the lithium battery to simulate the water intrusion under natural conditions such as rain. Evaluate the waterproof performance of the battery by observing its performance.
5. Precautions
Do not disassemble electronic products after waterproof:
To avoid damage to waterproof measures and sealing structure.
Pay attention to the use environment:
Try to avoid using electronic products in wet environments such as heavy rain and swimming pools to reduce the risk of moisture intrusion.
Clean the housing regularly:
To keep the shell clean and dry, to prevent dirt affecting the waterproof effect.
In summary, the lithium battery waterproof process is a comprehensive process involving design, production, testing and verification. Through reasonable sealing design, selection of suitable waterproof materials and processes, and strict testing and verification measures, the waterproof performance of lithium batteries can be effectively improved to ensure its safety and reliability.
Related News
Frey’s 2025 Annual Performance Review Conference was successfully convened
On 17 January 2026, Frey's Annual Performance Review Conference for 2025 formally commenced. The company's leadership and all departmental managers attended in full, delivering individual performance reviews centred on the fulfilment of annual responsibilities. The proce...
Battery Replacement Solution for Buses
Driven by urbanisation and the dual carbon strategy, new energy buses have become the dominant force in China's public transport system. However, as the first batch of vehicles gradually enter the degradation phase of their power batteries, bus operations now face a 'bat...
Sixty Days of Full-Scale Effort: The Final Push for Victory｜ Frey’s Dual-Base Collaboration Ignites Production Frenzy Across Frontlines!
23 December 2025: The year-end sprint reached its most intense phase. Frey's rallying cry—"Sixty days of hard work to clinch victory in the final push!"—sounded simultaneously at the Xuzhou production base and the Bengbu smart manufacturing base. ...
