Battery Pack Shock Sensing Integrated With BMS Control
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Solution Overview
Problem
Conventional battery packs lack the ability to detect and respond to external shocks, compromising safety due to the absence of a mechanism to control operations in response to physical impacts.
Innovation Solution
A battery pack with a shock detection module integrated into the battery management system (BMS) that uses a reference voltage source, resistors, and a non-conductive barrier wall with elastic connections to measure shock strength through voltage changes, allowing for controlled operation based on detected shock levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shock detection module is added to the battery pack, then safety is improved, but device complexity increases
Solution Approach 1:
The shock detection module is integrated into the existing battery management system by sharing the voltage measurement unit and control unit. The first resistor R1, second resistor R2, and measurement resistor R0 form a voltage divider circuit that utilizes the existing voltage measurement capability of the BMS, merging the shock detection function with the existing battery monitoring infrastructure.
Solution Approach 2:
The voltage measurement unit of the BMS serves dual purposes: it measures both the battery voltage for standard battery management functions and the voltage across the resistor network for shock detection. This multi-functionality allows the same hardware component to perform multiple tasks, adding shock detection capability without requiring a completely separate measurement system.
2Measurement precision
If multiple resistors and a non-conductive barrier wall are used for shock detection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The shock detection mechanism is segmented into distinct functional components: the non-conductive barrier wall that moves in response to shock, the first resistor R1 and second resistor R2 that form a voltage divider network with the measurement resistor R0, and the voltage measurement unit that detects changes in the voltage distribution. This segmentation allows each component to perform its specific function while contributing to the overall precision of shock detection.
Solution Approach 2:
The system detects shock by measuring changes in voltage parameters. When shock occurs, the non-conductive barrier wall moves, changing the resistance values in the voltage divider circuit formed by R1, R2, and R0. This causes a change in the distributed voltage that is measured by the voltage measurement unit, allowing precise detection of shock events through electrical parameter changes.
3Reliability
If the battery pack structure is modified to include shock detection components, then reliability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The shock detection components are merged with the existing battery management system structure. The voltage measurement unit, control unit, and resistor network are integrated into the existing BMS housing and circuit board infrastructure, allowing the shock detection functionality to be added without requiring a completely new structural design or separate manufacturing process for the detection system.
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
Enhances safety by stepwise detection of shock strength and corresponding control of the battery pack operations, ensuring appropriate safety measures are taken based on the intensity of the applied shock.
Implementation Method 1
a non-conductive barrier wall (310) connected to an inside of a case (10) through an elastic body (315)
Implementation Method 2
a voltage measurement unit that measures a distributed voltage between the reference resistor Rref and a measurement resistor R0
Data Source
AI summary
A battery pack with a shock detection module, and a battery pack for detecting a strength of a shock applied to the battery pack step by step by applying a shock detection module structure to a battery management system (BMS) and performing BMS control.