Integral Control Circuit for Vehicle Battery Cell Wiring Reduction
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Solution Overview
Problem
The complexity and cost associated with traditional hybrid electric vehicle battery packs, which require numerous sense wires between individual battery cells and a central control module, hinder manufacturability and increase electromagnetic interference susceptibility.
Innovation Solution
Integration of a dedicated electronic control circuit within each battery cell, allowing for digital communication via a single serial data line to the battery energy control module, eliminating the need for individual sense wires and enabling remote placement of the control module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual sense wires are run between each battery cell and the central control module, then voltage measurement capability is achieved, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent combines multiple measurement functions (voltage, temperature, current monitoring) into a single integrated control circuit board that is electrically connected to all battery cells. This consolidation eliminates the need for individual sense wires for each cell, reducing wiring complexity while maintaining comprehensive monitoring capabilities.
Solution Approach 2:
The control circuit board performs multiple functions simultaneously: it monitors voltage across battery terminals, measures temperature via thermocouples, detects current through shunt resistors, and controls relay switches. This multi-functional approach replaces what would traditionally require separate dedicated circuits and wiring for each function.
2Reliability
If numerous sense wires are used to connect each battery cell to the control module, then individual cell monitoring is achieved, but susceptibility to electromagnetic interference increases
Solution Approach 1:
By consolidating monitoring functions onto a single control circuit board with centralized electrical connections, the patent reduces the total length and number of wire runs exposed to electromagnetic interference. The integrated design minimizes the antenna effect that multiple individual sense wires would create.
Solution Approach 2:
The control circuit board acts as an intermediary hub that collects data from all battery cells through controlled connections. This centralized mediation point allows for better signal management and shielding strategies compared to multiple distributed sense wires extending throughout the battery pack.
Data Source
AI summary
The present disclosure relates to a vehicle battery pack having battery cells with an integral control circuit configured to communicate with a battery energy control module.