Battery Module End-Plate Circuit Layout for Exhaust Gas Protection
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Solution Overview
Problem
Battery modules face challenges in downsizing due to the presence of components like gas ducts, circuit boards, and lead wires on the upper surface, which are vulnerable to high-temperature, high-pressure exhaust gas, leading to potential combustion and reduced safety, and hinder efficient heat dissipation.
Innovation Solution
The battery module design includes electronic circuit blocks on the outer surfaces of end plates, connected via shortened voltage detection lines, with end plates shielding the circuitry from exhaust gas and facilitating efficient heat dissipation, while reducing the overall height and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit board is disposed on the upper surface of the battery stack to detect battery cell voltages, then the voltage detection function is achieved, but the circuit board is exposed to high-temperature, high-pressure exhaust gas causing potential combustion and reduced safety
Solution Approach 1:
The circuit board is extracted from its conventional position on the upper surface of the battery stack and relocated to the end plate. This removes the circuit board from the hazardous environment where exhaust gas accumulates, eliminating the combustion risk while preserving the voltage detection function through extended detection lines.
Solution Approach 2:
The end plate serves as an intermediary structure that houses the circuit board away from the battery stack's upper surface. This intermediate location provides physical separation from exhaust gas while maintaining electrical connection to battery cells through extended detection lines, thus protecting the circuit board from thermal and pressure hazards.
2Reliability
If the circuit board is disposed on the upper surface of the battery stack, then voltage detection is enabled, but the overall height of the battery module increases
Solution Approach 1:
The circuit board arrangement transitions from a vertical stacking approach (on the upper surface) to a horizontal integration approach (on the end plate). This dimensional repositioning eliminates the need for additional vertical space, maintaining compact battery module height while preserving voltage detection functionality through extended detection lines.
3Reliability
If the circuit board is disposed on the upper surface of the battery stack, then voltage detection is achieved, but heat dissipation efficiency is reduced due to obstructed airflow
Solution Approach 1:
The circuit board is extracted from the upper surface location and relocated to the end plate. This removal from the upper surface eliminates the obstruction to exhaust gas flow and heat dissipation pathways, allowing improved thermal management while maintaining voltage detection capability through extended detection lines.
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
This design enhances safety by protecting circuit boards from high-temperature, high-pressure exhaust gas, allows for efficient heat dissipation, and ensures accurate voltage detection with reduced impedance, thereby ensuring stable operation and high safety even in abnormal conditions.
Implementation Method 1
end plates shielding the circuitry from exhaust gas
Implementation Method 2
facilitating efficient heat dissipation
Implementation Method 3
connected via shortened voltage detection lines, with reduced impedance
Data Source
AI summary
A battery module includes battery stack including a plurality of stacked battery cells, a pair of end plates disposed at both end parts in a stacking direction of battery stack, bind bar in which the pair of end plates are coupled, and electronic circuit block mounted with voltage detection circuit that detects a voltage of battery cells. Electronic circuit block is disposed on an outer surface of both end plates disposed at both end parts of battery stack, and electronic circuit block is connected to battery cells via voltage detection line.