With the widespread adoption of new energy vehicles, the safety and reliability of charging guns have become core requirements. Due to prolonged exposure to outdoor rain, dust, and temperature fluctuations, ordinary switches are insufficient to meet usage demands. The IP67 waterproof micro switch, with its high level of protection and stable performance, has become a key component in the locking and control system of charging guns.
What is an IP67 Waterproof Micro Switch?
An IP67 waterproof micro switch is a micro switch that has received stringent protection rating certification. According to the international standard IEC 60529, IP67 stands for "completely dustproof (6)" and "submersible in water for short periods (7)". This rating means that the switch's internal contacts are completely sealed, allowing it to maintain normal triggering and stable operation even in dusty, humid, or rain-soaked environments. For more information on waterproof micro switches, please read 《What is a Waterproof Micro Switch?》
The Core Features Of The Ip67 Micro Switch Include The Following:
High-Level Sealing Structure Design
Utilizing silicone sealing rings, epoxy resin potting, and ultrasonic welding of the shell, multiple protective barriers are formed, effectively preventing dust, moisture, and impurities from entering the contact area, ensuring stable electrical performance even under rain or humid environments.
Excellent Mechanical And Electrical Lifespan
Optimized for high-frequency plugging and unplugging scenarios in charging guns, the mechanical lifespan typically reaches 300,000 to 500,000 cycles or more. The electrical lifespan maintains stable conduction and breaking performance under rated load conditions, reducing failure rates over long-term use.
Strong Wide Temperature And Environmental Adaptability
It can operate stably in a temperature range of -40℃ to +85℃, and has passed damp heat testing, salt spray testing, and vibration and shock testing, meeting the long-term operation requirements of outdoor charging equipment in complex environments.
Compact Structure And High Installation Adaptability
Its compact size makes it suitable for charging guns with limited internal space; it also provides precise travel control and clear contact feedback, ensuring accurate and reliable operation of the locking mechanism and control buttons.
Long-Term Stable Signal Output Capability
The contact material has been optimized to have low and stable contact resistance, making it suitable for low-current signal detection systems and avoiding false triggering or system misjudgment due to poor contact.
The Key Application of IP67 Micro Switches in Charging Guns
In charging gun design, IP67 waterproof micro switches are primarily used in two key components: the locking mechanism and the control buttons. Proper placement and selection of these switches play a crucial role in ensuring charging safety and extending the lifespan of the equipment.
Application of Waterproof Micro Switches in Locking Mechanisms
IP67 micro switches are primarily used in the locking mechanisms of charging guns. For example, Unionwell's G23 series motor lock micro switches enable latch closure detection, plug positioning signal feedback, and live gun removal interlock control. When the charging gun is not fully inserted or during abnormal operation, the system immediately cuts off the current, ensuring charging safety. Its highly sealed structure allows for stable triggering in rain and dusty environments, improving overall reliability.
IP67 micro switches are primarily used in the locking mechanisms of charging guns. When the user inserts the charging gun into the vehicle interface, the latch action must be precisely monitored. The charging gun locking mechanism is the core structure that ensures the safe insertion of the charging gun into the electric vehicle interface and prevents it from being pulled out while energized. Locking mechanisms typically rely on micro switches for real-time status detection, making the application of IP67 micro switches crucial in this process. When the latch is fully closed, the switch contacts close, and the system determines that the charging gun is correctly positioned; otherwise, the charging system will not start.
This process utilizes Unionwell's G23 series motor lock micro switches to achieve latch closure detection. Compared to ordinary micro switches, the IP67 micro switch's sealing performance effectively prevents signal misinterpretation caused by external factors such as rain and dust, thereby improving device stability and user experience.
Application of IP67 Micro Switches in Charging Gun Control Buttons
IP67 micro switches also play a crucial control role in charging guns, especially in the control button structure. When the user presses the start or stop button, the internal micro switch must complete contact switching within a very short time and feed back a clear and stable electrical signal to the main control system, ensuring immediate response and error-free triggering of the charging action.
Similar to the locking mechanism, the control button is a high-frequency operating part and is constantly exposed to outdoor rain, dust, and temperature differences. If the sealing performance is insufficient, moisture or dust can easily enter, causing contact oxidation, increased contact resistance, or even signal failure. Therefore, using a micro switch with an IP67 protection rating is an important design prerequisite for ensuring the long-term stable operation of the charging gun.
In practical applications, Unionwell's G10B series IP67 micro switches are widely used in the charging gun control button structure. This series adopts a fully sealed design and a high-reliability spring structure, providing stable triggering force and precise travel control. Even under high-frequency pressing conditions, it can maintain low contact resistance and clear on/off feedback, avoiding charging abnormalities caused by false triggering or signal jitter.
Why a Charging Gun Must Choose an IP67 Waterproof Micro Switch
Ordinary micro switches cannot withstand the complex operating environments of charging guns; their protective capabilities and lifespan are insufficient to guarantee long-term safety. The main reasons for choosing an IP67 waterproof micro switch are as follows:
IP67 is represented by two numbers, with higher numbers indicating a higher level of protection. The IP67 rating is defined as follows:
Dustproof rating 6: Dustproof rating ranges from 0 to 6, with rating 6 indicating complete protection against dust entering the switch.
Waterproof rating 7: Can be submerged in 1 meter of water for a short period and still function normally.
Structural Differences Between Ip67 Waterproof Micro Switches And Ordinary Micro Switches
Compared to ordinary micro switches, IP67 waterproof micro switches emphasize overall sealing and long-term stability in their structural design. Internally, they typically use silicone sealing rings to isolate the contact areas and reinforce key components with epoxy sealant. The outer shell is formed using ultrasonic welding or a one-piece molding process, creating a completely sealed structure.
This design effectively prevents moisture and dust intrusion, maintaining stable conductivity even in high-humidity and high-pollution environments. Ordinary micro switches, on the other hand, are mostly open or semi-sealed structures, making them unsuitable for the protection requirements of outdoor charging devices.
IP67 Micro Switch Certification in the Automotive Charging Gun Industry
To meet the standards of the new energy vehicle industry, an IP67 waterproof micro switch must pass a series of rigorous certifications:
Automotive Electronic Environment Testing
This includes high and low temperature cycling tests, constant temperature and humidity tests, and vibration and mechanical shock tests. By simulating extremely cold, hot, and high humidity environments, the stability of materials and contact structures under thermal expansion and contraction conditions is verified; the vibration and shock tests simulate the dynamic conditions of a vehicle in motion, ensuring that internal springs and contacts do not shift or fail under continuous vibration.
Waterproof Rating Verification Process
A standard immersion test (1 meter depth, 30 minutes) is required. After the test, the switch should maintain normal conductivity and insulation performance. Multi-angle spray or high-pressure water jet tests may also be conducted to simulate real-world usage scenarios such as heavy rain and car washes, comprehensively verifying the reliability of the sealing structure.
Salt Spray and Corrosion Resistance Tests
Accelerated corrosion tests in a salt spray environment simulate usage conditions in coastal or high-humidity industrial areas, evaluating the corrosion resistance of metal contacts, plating, and housing materials to prevent oxidation, rust, or poor contact, ensuring long-term stable electrical performance.
Long-Term Reliability Verification System
This includes high-cycle mechanical life testing, electrical life testing, and cyclic switching tests under high and low temperature conditions to verify the switch's stability in environments with frequent insertion/removal and high-frequency operation. After testing, it must be ensured that contact resistance changes are controlled and the operating stroke is consistent, thus guaranteeing no performance degradation over long-term use.
How Unionwell Ensures The Stability Of IP67 Waterproof Micro Switches
As a professional manufacturer of IP67 waterproof micro switches, Unionwell has established a comprehensive system for design, production, and testing:
- Integrated Mold Sealing Design Capability: Utilizing high-precision molds ensures a completely sealed switch structure, improving the consistency of waterproof performance and avoiding the risk of leakage.
- Full Inspection IP67 Immersion Test Process: Every switch undergoes an immersion test before leaving the factory to ensure reliable contact operation and compliance with protection standards.
- Automated Production and Consistency Control:Automated production lines reduce human error, and continuous monitoring of critical dimensions and contact gaps ensures consistent performance across batches.
- Customized Solutions for OEMs: Customized dimensions and travel are provided based on the charging gun's locking mechanism, control buttons, and internal space. A combined solution of the G23 series motor lock and G10B control button microswitch is also offered, achieving high adaptability and reliability.
Through these measures, Unionwell's IP67 waterproof micro switch maintains long-term stability under complex environments and high-frequency use, meeting the high standards of the charging gun industry.
Conclusion
IP67 waterproof micro switches have become an indispensable core component of new energy vehicle charging guns. They not only boast a high protection rating and effective dust and water resistance, but also ensure stable operation of the locking mechanism and control buttons in complex environments through precise structural design and long-term reliability verification. Charging gun manufacturers must fully understand the switch's structural characteristics, application location, and certification standards during the design phase to select the appropriate IP67 micro switch, thereby improving product safety, reliability, and user experience.
If you are selecting a suitable micro switch for your automotive charging gun, consider Unionwell's IP67 waterproof micro switch series. Correct selection and application of IP67 micro switches are crucial for ensuring the safe and stable operation of charging guns and are key to enhancing competitiveness and user satisfaction for industry customers.