Fuse Box Vibration Sensing Circuit for Battery Pack Protection
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Solution Overview
Problem
The increasing number of battery cells in electric vehicles makes the fuse box and bus bar vulnerable to external vibrations, leading to disconnection and reduced user stability due to insensitivity in power delivery.
Innovation Solution
A battery pack with a vibration detection element attached to the fuse box or bus bar, connected to the BMS, which measures changes in voltage and performs protection operations when vibrations exceed a predetermined level, preventing overcurrent blocking failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of battery cells is increased to provide higher power, then the power output is improved, but the vulnerability to external vibrations increases leading to fuse box disconnection
Solution Approach 1:
The vibration detection element is installed in advance on the fuse box to detect vibrations before they cause disconnection. The BMS performs preliminary protection operations when vibration thresholds are exceeded, preventing damage before it occurs.
Solution Approach 2:
The vibration detection element continuously monitors vibration levels and provides feedback to the BMS. The BMS adjusts its protection operations based on the real-time vibration feedback, creating a closed-loop control system that responds to changing vibration conditions.
2Measurement precision
If the vibration detection element is attached to the fuse box to detect vibration, then the detection capability is improved, but the device complexity increases
Solution Approach 1:
The BMS performs multiple functions including normal battery management and vibration-based protection operations. The vibration detection element serves both as a vibration sensor and as a trigger for protection operations, reducing the need for separate dedicated components.
Solution Approach 2:
The system uses its existing BMS and communication infrastructure to handle vibration detection and protection. The vibration detection element connects through existing terminals and the BMS uses its existing processing capabilities, avoiding the need for separate dedicated protection systems.
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 vibration detection element effectively senses and transmits vibration data to the BMS, enabling timely protection operations and maintaining user stability by preventing damage from external vibrations.
Implementation Method 1
a vibration detection element attached to one surface of the fuse box or one surface of the bus bar connected to the external BMS of the battery pack to detect vibration flowing into the fuse connected to each of the battery modules
Data Source
AI summary
A battery pack includes one or more battery modules provided with a plurality of battery cells, a bus bar connected to a module terminal of each battery module to electrically connect the one or more battery modules, and connected to an external batter management system (BMS) of the battery pack, and a fuse box including a fuse connecting each module terminal to the bus bar, and a vibration detection element attached to the fuse box or the bus bar to detect vibration flowing into the fuse connected to each of the battery modules, and the vibration detection element is directly connected to a battery monitoring integrated circuit (BMIC) through terminals at both ends thereof.