Battery Pack Temperature Detection with Redundant Sampling Circuits
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Solution Overview
Problem
Existing battery pack temperature monitoring systems are inadequate as they rely on limited testing points, leading to high failure rates and inability to distinguish between temperature changes and sampling circuit faults, making it difficult to ensure safety by preventing overheating.
Innovation Solution
A battery pack temperature detection system with multiple temperature monitoring points, each equipped with at least two different sampling circuits, and a control module that uses a multiplexer switch module and analog-digital conversion units to accurately determine battery pack temperature and reduce the impact of single circuit failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple temperature monitoring points are used, then temperature detection coverage is improved, but device complexity increases
Solution Approach 1:
The battery pack is divided into multiple temperature monitoring points (first, second, third monitoring points) located at different positions (positive electrode, negative electrode, and battery housing respectively). This segmentation allows comprehensive temperature coverage across the entire battery pack, enabling accurate detection of temperature distribution and hot spots without requiring a single complex monitoring system.
2Reliability
If redundant sampling circuits are configured at each monitoring point, then reliability is improved, but device complexity increases
Solution Approach 1:
At each temperature monitoring point, two different sampling circuits are configured with different circuit structures (first sampling circuit with voltage divider configuration, second sampling circuit with different component arrangement). This local redundancy ensures that if one sampling circuit fails, the other can still provide temperature data, significantly improving system reliability while distributing the complexity across multiple simple circuits rather than one complex circuit.
Solution Approach 2:
The system pre-configures redundant sampling circuits at each monitoring point before any failure can occur. This beforehand cushioning approach ensures that backup sampling paths are already in place, so when a sampling circuit fails, the system can immediately switch to the redundant circuit without interruption, maintaining continuous temperature monitoring capability.
3Measurement precision
If multiple different sampling circuits are used at the same monitoring point, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The two sampling circuits at each monitoring point use different circuit parameters and configurations (different voltage divider ratios, different resistor values, different connection topologies). This parameter diversity allows the system to detect temperature through multiple independent measurement paths, improving accuracy by reducing the impact of parameter drift or errors in a single circuit configuration.
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 system provides comprehensive temperature monitoring, reduces the effect of single circuit failures, and improves accuracy by using redundant sampling circuits and independent analog-digital conversion units, enabling effective detection and alarming for overheating conditions.
Implementation Method 1
The sampling circuit includes a temperature sensor disposed at a temperature monitoring point and a detection circuit connected to the temperature sensor
Data Source
AI summary
Disclosed is a battery pack temperature detection system, comprising: a battery pack disposed with a plurality of temperature monitoring points; a plurality of sampling circuits, wherein each temperature monitoring point is disposed with at least two of the plurality of sampling circuits, and the at least two of the plurality of sampling circuits disposed for one temperature monitoring point are different sampling circuits; and a control module configured to acquire temperature data of each temperature monitoring point by each of the disposed sampling circuits, and determine a current temperature of the battery pack according to the temperature data to determine whether the temperature of the battery pack exceeds a preset value.