Battery Module End-Plate Circuit Layout for Simpler Voltage Sensing
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Solution Overview
Problem
Existing battery modules face issues with high height and complex wiring patterns due to the placement of circuit boards on the battery stack, which complicates voltage detection and increases the risk of thermal damage from high-temperature exhaust gas.
Innovation Solution
The circuit board is relocated to the outer surface of the end plates, with a simplified wiring pattern that uses linearly arranged connectors and connection lines to detect cell voltages, reducing the overall height and protecting the electronic circuit block from high-temperature exhaust gas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the circuit board is disposed on the battery stack, then the voltage detection function is achieved, but the battery module height increases and the wiring pattern becomes complicated
Solution Approach 1:
The circuit board is moved from the vertical space above the battery stack to the horizontal surface of the end plate, changing the spatial dimension of component placement. This reduces the height requirement while maintaining the voltage detection function through properly arranged connectors and wiring patterns on the end plate surface.
2Measurement precision
If the circuit board is disposed on the battery stack, then the voltage detection function is achieved, but the wiring pattern becomes complicated
Solution Approach 1:
Multiple voltage detection lines are merged into a single connector on the end plate, where multiple battery cell voltages are input through one consolidated connection point. This merging approach simplifies the wiring pattern by reducing the number of separate connectors and routing paths while maintaining accurate voltage detection for all battery cells.
3Measurement precision
If the circuit board is disposed on the battery stack, then the voltage detection function is achieved, but the electronic circuit block is exposed to high-temperature exhaust gas
Solution Approach 1:
The electronic circuit block is extracted from its original position on the battery stack and relocated to the end plate, which is positioned away from the high-temperature exhaust gas region. This spatial extraction removes the vulnerable electronic components from the harmful thermal environment while preserving the voltage detection functionality through extended wiring to the battery cells.
4Measurement precision
If connectors are arranged on both sides of the battery stack, then all battery cell voltages can be detected, but the wiring pattern becomes complicated
Solution Approach 1:
Connectors that were previously distributed on both sides of the battery stack are merged into a single connector located on the end plate. This consolidation maintains comprehensive voltage detection coverage for all battery cells while significantly simplifying the overall connector arrangement and reducing the number of discrete connection points required.
Data Source
AI summary
In a battery module, end plates disposed at both ends of battery stack are connected by binding bars. Electrode terminals of respective battery cells and voltage detection circuit of electronic circuit block are connected by a plurality of voltage detection lines. Electronic circuit block is disposed on an outer surface of end plate and fixes one connector formed by linearly disposing a plurality of connecting terminals to which voltage detection lines are connected to circuit board on which voltage detection circuit is mounted. Voltage detection circuit is provided with a plurality of input terminals arranged in a linear manner. In circuit board, connecting terminal and input terminal disposed at opposite positions are connected by a plurality of connection lines. A cell voltage of each battery cell is input from connection line to adjacent input terminals.