EV Charging Socket Sealing and Drainage for Winter Reliability
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Solution Overview
Problem
Existing electric vehicle charging sockets lack reliability and safety under various environmental conditions, particularly outdoors, where they must withstand rain and ice formation without compromising charging efficiency.
Innovation Solution
The charging socket design includes high-current metal energy lines, signal lines with precise positioning and shielding, a housing with media-tight seals, a water drainage feature, and a temperature sensor for adaptive charging, along with a metallic shielding braid and crimping technology for secure connections, ensuring safety and efficiency across different charging scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the charging socket is equipped with basic power lines and simple sealing, then the device complexity is low, but the reliability under various environmental conditions deteriorates
Solution Approach 1:
The charging socket is divided into functionally independent modules: housing with sealing elements, contact carrier with contact elements, cable managers for signal lines, and drainage system. Each module can be manufactured and assembled separately, improving reliability through modular design while managing complexity systematically.
Solution Approach 2:
The sealing elements are pre-installed in the housing, and the contact elements are pre-positioned in the contact carrier before final assembly. The drainage path is pre-formed in the housing structure. These preliminary actions ensure proper sealing and positioning from the start, enhancing reliability without requiring complex adjustment mechanisms during operation.
2Manufacturing precision
If simple cable management is used for signal lines, then the manufacturing process is simple, but the positioning precision and twist-proof positioning deteriorates
Solution Approach 1:
Cable managers serve as intermediary structures that guide and position signal lines through predefined paths with feed-through openings. The cable managers act as mediators between the signal lines and the housing, ensuring precise positioning and preventing twisting without requiring complex direct mounting mechanisms.
Solution Approach 2:
The cable managers are made of flexible material that can accommodate signal lines while maintaining their position. The flexible structure allows easy insertion of signal lines through feed-through openings while providing twist-proof positioning through the constrained path, balancing manufacturing ease with positioning precision.
3Reliability
If no drainage feature is provided, then the structure is simpler, but the resistance to winter conditions and water ingress deteriorates
Solution Approach 1:
Instead of trying to prevent water from entering the charging socket through complex sealing systems alone, the design inverts the approach by providing a controlled drainage path that actively removes water that does enter. The housing includes a drainage opening and drainage path that directs water away from sensitive components, improving winter resistance without requiring overly complex prevention mechanisms.
4Reliability
If basic sealing is used between housing and contact carrier, then the manufacturing is simpler, but the media tightness deteriorates
Solution Approach 1:
A sealing element in the form of a flexible ring or membrane is placed between the housing and contact carrier. This flexible sealing element conforms to the mating surfaces, creating effective media tightness while allowing for manufacturing tolerances and assembly variations. The flexible nature of the seal enables simple installation without requiring precision machining or complex fastening mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a reliable and winter-proof charging socket that maintains media tightness and electrical integrity, allowing safe and efficient charging in diverse conditions, including outdoor use.
Implementation Method 1
A metallic braided shield is arranged on top of this primary insulation layer. This braided shield provides electromagnetic shielding for the power conductor.
Implementation Method 2
Preferably, a seal is arranged between the housing and the contact carrier. This improves the media tightness of the charging socket. Preferably, a sealing ring is arranged on the overmolding. This ensures a particularly high level of media tightness for the charging socket in the area of the signal cable entry.
Implementation Method 3
an opening with a molded-in outlet for water drainage is provided in the plug area of the contact carrier. This allows, for example, rainwater that enters the charging socket during outdoor charging to drain away.
Implementation Method 4
The charging socket has at least one temperature sensor located near a power contact element. The temperature sensor data can be used to control the charging process.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The invention relates to a charging socket (1) for an electric vehicle comprising at least two electrical power lines (2) for transmitting a charging current, at least two signal lines (16) for transmitting control signals during the charging process, a housing (13) and a contact carrier (14) connected thereto, which forms the plug area for a charging connector, wherein the signal lines (16) are arranged in two spaced-apart and parallel-oriented cable managers (17) and wherein the signal lines (16) between the cable managers are provided with an overmolding (18).