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Rubber Lithium battery rubber seal Wholesale

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Wholesale Lithium battery rubber seal Manufacturers

Zhejiang Hongda Special Rubber Products Co., Ltd.
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Company profile

Started in China, Marketing in the World
29 years of research spirit in the industry.

Established in 1993, Zhejiang Hongda Special Rubber Products Co., Ltd. is a professional China Lithium battery rubber seal Manufacturers and Wholesale Lithium battery rubber seal Factory. The company integrates scientific research, production and trade, pays attention to scientific and technological innovation, and strives to develop industrial battery safety valve products with high technology content and high quality performance. We has more than 50 industrial battery safety valves, safety caps, microporous materials, explosion-proof discs, etc. patented, among them, microporous materials were identified as national key new products. The company has drafted and formulated industry standards for lead-acid battery safety valves and national standards for rubber seals for power lithium batteries, and has passed a series of system certifications such as IS09001, IS014001, IS045001 and "Made in Zhejiang".

  • 29 +

    Established in 1993

  • 15 0,000+

    Average daily output

  • 200 +

    Employees

Honor

Welcome to visit Hongda

Our company has won the "Zhejiang High-tech Enterprise", "Excellent Demonstration Enterprise of Emphasizing Quality and Integrity", "Zhejiang Science and Technology Small and Medium-sized Enterprise" and many other honors..

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  • honor
    High-tech Enterprise
  • honor
    National Key New Product Certificate 2008
  • honor
    2008 The Most Growth Potential Small and Medium Enterprises In Zhejiang Province
  • honor
    2013 Innovative Demonstration Small and Medium Enterprises In Zhejiang Province
  • honor
    Advanced Enterprise for Innovation and Development of Small, Medium and Micro Enterprises in Zhejiang Province
  • honor
    Small and Medium-sized Enterprise with Specialization, Refinement, Characterization, Novelization In Zhoushan City
  • honor
    Provincial SME Technology Center
  • honor
    Top 10 Growing Small and Medium Enterprises
  • honor
    Provincial High-tech Enterprise Research and Development Center
  • honor
    Zhejiang Enterprise Standard "Leader" Certificate
News

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Industry Knowledge Expansion

The Importance of Lithium Battery Rubber Seals

As a high-energy-density, lightweight battery technology, lithium batteries are widely used in mobile devices, electric vehicles, renewable energy systems and other fields. However, the high energy density of lithium batteries also comes with a series of safety and stability challenges, in which rubber sealing rings, as one of the key packaging materials, play a vital role.
Challenges of the internal battery environment
Lithium batteries contain key components such as electrolytes, positive and negative electrode materials, and these components are very sensitive to the external environment. Potential problems include:
Electrolyte leakage: The electrolyte is the conductive medium inside the battery. Once it leaks, it may cause battery performance to decrease or even cause a safety accident.
Intrusion of external pollutants: Sensitive materials inside the battery are easily affected by external moisture, dust and other pollutants, which affects the normal operation of the battery.
Basic functions of lithium battery rubber seals
As an important component in battery packaging, lithium battery rubber sealing rings undertake a number of basic functions. These functions are directly related to the performance, safety and life of lithium batteries.
Electrolyte sealing and protection functions
The primary function of the rubber sealing ring is to ensure the sealing of the electrolyte inside the battery and prevent electrolyte leakage. The electrolyte acts as an ion conductive medium in lithium batteries. If it leaks, it will lead to a decrease in battery capacity and abnormal chemical reactions inside the battery. In severe cases, it may cause thermal runaway or even explosion. Therefore, the rubber sealing ring must have a high degree of sealing to prevent electrolyte from leaking during battery operation.
External environment isolation and anti-pollution function
The rubber sealing ring not only prevents the leakage of internal materials in the battery, but also effectively isolates the influence of the external environment. The positive and negative electrode materials inside the battery are extremely sensitive to moisture, oxygen, dust, etc. in the air. The intrusion of these external substances may cause unstable battery performance. The rubber sealing ring ensures that the inside of the battery is protected from contamination from the external environment through its high elasticity and sealing properties, maintaining a pure environment for the battery.
Vibration absorption and mechanical protection functions
Lithium batteries may be subject to vibration and shock during use, such as in electric vehicles, power tools and other application scenarios. The elastic properties of the rubber sealing ring can effectively absorb external vibration and slow down the impact of impact on the battery structure. This feature helps improve the mechanical stability of the battery and reduces loosening and wear of internal components, thereby extending the battery life.
Temperature stabilization and heat dispersion function
Lithium batteries will generate a certain amount of heat during charging and discharging, especially when discharging at high currents. The rubber sealing ring needs to have good high temperature resistance to stabilize the internal temperature of the battery. At the same time, the sealing ring can also help disperse the heat generated inside the battery, prevent local overheating, and improve the safety and stability of the battery.
Shape-adaptive and tight-fitting functionality
The design of the rubber sealing ring should adapt to the shape of different battery structures to ensure that it can be closely combined with the battery case during the packaging process to form an effective sealing barrier. The shape adaptability ensures that the sealing ring can completely wrap the internal components of the battery without leaving any dead corners to ensure the sealing effect.
Sustainability and material stability features
Rubber seals need to have high chemical resistance to cope with the corrosive environment that may be caused by chemical substances inside the battery. In addition, the demand for long-life batteries is increasing day by day, and the material selection and design of the rubber sealing ring must consider its stability during long-term use to ensure the sustainable operation of the battery.

Design and manufacturing of lithium battery rubber seals

The design and manufacturing of lithium battery rubber sealing rings is a key project, which directly affects the sealing, stability and safety of the battery.
Design phase
a. Shape design:
Battery structure analysis: When designing a rubber sealing ring, you first need to conduct a detailed analysis of the battery structure, including the shape of the battery case, the layout of internal components, etc. Designers must consider the overall geometry of the battery to ensure that the rubber seal fits perfectly into the battery casing for an effective seal.
Stress analysis: Conduct stress analysis to determine the stress that the rubber sealing ring may be subjected to during battery assembly and use to ensure that the designed sealing ring can maintain its elasticity and shape under various working conditions.
b. Material selection:
Chemical resistance: Choose a rubber material with excellent chemical resistance to adapt to the chemical environment that may exist inside the battery and ensure that the sealing ring will not be affected by corrosion for a long time.
High temperature resistance: Since the battery will generate a certain amount of heat during charging and discharging, the rubber sealing ring needs to have good high temperature resistance to ensure that it does not deform or age in the high temperature working environment of the battery.
c. Manufacturing process considerations:
Injection Molding: Injection molding is one of the commonly used manufacturing methods. It is formed by injecting rubber material into a mold to ensure that the shape and size of the seal are consistent.
Vulcanization process: Vulcanization is a key step in rubber processing. By adding vulcanizing agents at high temperatures, the rubber material is cross-linked and its elasticity and wear resistance are improved.
Manufacturing stage
a. Material preparation:
Raw material testing: Strict raw material testing is conducted on the selected rubber materials to ensure that they comply with relevant standards and regulations.
Additive formulation: For different application scenarios, it may be necessary to add some special fillers, reinforcing agents or flame retardants to the rubber to improve the performance of the rubber.
b. Injection molding:
Mold design: Design a suitable injection mold to ensure that a rubber sealing ring that meets the design requirements can be accurately formed.
Injection molding process control: Control parameters such as temperature, pressure, and injection speed during the injection molding process to ensure that the rubber material fully fills the mold and obtains a high-quality sealing ring.
c. Vulcanization treatment:
Vulcanization temperature control: Set the vulcanization temperature and vulcanization time to ensure that the rubber reaches the ideal degree of cross-linking during the vulcanization process and maintains its stability and elasticity.
Vulcanization equipment adjustment: Precisely adjust the vulcanization equipment to ensure uniformity and stability of the entire vulcanization process.
d. Quality control:
Dimensional inspection: Dimensional inspection of finished products to ensure that the geometric dimensions of the rubber sealing ring meet the design requirements.
Performance test: Conduct performance tests such as high temperature resistance and chemical corrosion resistance to ensure that the rubber sealing ring can work normally under various working conditions.