Battery Module Sealing Member for Sensor Wire Hole
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Solution Overview
Problem
Secondary battery modules face the challenge of temperature control, as excessive heat can lead to gas generation and explosion, rendering the battery cells unusable, and existing solutions fail to effectively manage temperature while maintaining cooling efficiency and preventing air leakage through wiring paths.
Innovation Solution
A secondary battery module design featuring a temperature sensor on each battery cell connected via a conducting wire, with a sealing member made from elastic rubber materials like EPDM or NBR, which seals the wire hole to prevent air leakage and enhance cooling efficiency by stabilizing the wiring path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conducting wire is passed through a wire hole to connect the temperature sensor, then the temperature monitoring function is achieved, but air may leak through the wire hole reducing cooling efficiency
Solution Approach 1:
A sealing member is introduced as an intermediary component between the wire hole and the external environment. This sealing member surrounds the conducting wire and seals the wire hole, preventing air leakage while allowing the temperature sensor to function normally. The sealing member acts as a mediator that resolves the conflict between needing wire penetration for temperature monitoring and maintaining sealing for cooling efficiency.
2Loss of energy
If the wire hole is sealed to prevent air leakage, then cooling efficiency is improved, but the conducting wire cannot pass through to connect the temperature sensor
Solution Approach 1:
The sealing member is designed with a flexible structure that can accommodate the conducting wire passing through it. The sealing member includes a through-hole or opening that allows the wire to pass while maintaining the sealing function. This flexible design enables both the wiring installation and the air leakage prevention to coexist, resolving the contradiction between sealing effectiveness and wiring accessibility.
3Object-affected harmful factors
If vents are opened to discharge gas when temperature increases, then gas discharge function is achieved, but the battery cells cannot be reused
Solution Approach 1:
Temperature sensors are installed on battery cells to monitor temperature in advance. This preliminary monitoring allows for early detection of temperature increases and enables preventive cooling actions before gas generation occurs. By taking preliminary action through temperature monitoring and proactive cooling, the system prevents the need to open vents, thereby maintaining battery reusability while still protecting against gas discharge hazards.
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 effectively controls temperature, prevents gas generation, and maintains cooling efficiency by securely sealing the wiring paths, ensuring the battery cells can be reused and operate reliably.
Implementation Method 1
a sealing member made from elastic rubber materials like EPDM or NBR, which seals the wire hole to prevent air leakage
Data Source
AI summary
A secondary battery module including a plurality of battery cells, a temperature sensor disposed on a surface of at least one of the battery cells, a conducting wire connected to the temperature sensor, a module frame coupled to the battery cells, fixing the battery cells in a position and having a wire hole through which the conducting wire passes, and a sealing member surrounding the conducting wire and coupled to the wire hole, sealing the wire hole.