Multiplexer Thermistor Circuit for Battery Temperature Monitoring
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Solution Overview
Problem
Current energy storage systems face challenges in accurately detecting battery state and efficiently managing power consumption due to complex circuit configurations and high power usage, particularly in adapting to environmental changes and renewable energy integration.
Innovation Solution
An energy storage system that employs a multiplexer and power switch unit to selectively connect thermistors to a reference resistor for temperature measurement, using a control signal to manage power distribution and reduce circuit complexity, allowing for precise battery state detection and low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple separate temperature detection circuits are used for each thermistor, then each battery unit temperature can be detected independently, but the circuit complexity increases and power consumption increases
Solution Approach 1:
Multiple temperature detection circuits are merged into a single shared circuit through the use of a multiplexer. The multiplexer sequentially connects different thermistors to the same reference resistor and measurement circuit, allowing independent detection of each battery unit's temperature while using only one set of detection components, thereby reducing overall circuit complexity.
Solution Approach 2:
A single temperature detection circuit is designed to serve multiple functions by detecting temperatures of different battery units at different time intervals. The multiplexer enables the circuit to be universally applied to all thermistors in the system, making one circuit perform the work of multiple circuits while reducing redundancy.
2Measurement precision
If multiple separate temperature detection circuits are used for each thermistor, then each battery unit temperature can be detected independently, but power consumption increases
Solution Approach 1:
Multiple power-consuming detection circuits are combined into a single shared circuit that is activated only when needed. The multiplexer allows one detection circuit to serve multiple thermistors sequentially, so that only one set of components (reference resistor, measurement circuitry) consumes power at any given time, rather than multiple circuits consuming power simultaneously or continuously.
Solution Approach 2:
The temperature detection is performed periodically and sequentially for each thermistor rather than continuously for all thermistors. The multiplexer switches between different thermistors in a periodic manner, activating the detection circuit only during each measurement interval, thereby significantly reducing overall power consumption compared to continuous monitoring of all channels.
3Device complexity
If a simple circuit configuration is used, then circuit complexity is reduced, but temperature measurement capability is limited
Solution Approach 1:
A single, relatively simple temperature detection circuit is designed with universal capability to measure temperatures of multiple battery units. The multiplexer provides the adaptability needed for this simple circuit to handle multiple measurement channels, allowing the circuit to be reconfigured for different measurement needs without requiring complex dedicated circuits for each thermistor.
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 system achieves accurate battery state detection and reduced power consumption by simplifying the circuit configuration and sharing temperature measurement circuits among thermistors, enabling efficient energy management and integration with renewable energy sources.
Implementation Method 1
a plurality of thermistors detecting a temperature of the plurality of battery units
Implementation Method 2
a multiplexer performing multiplexing on the plurality of thermistors, and connecting a thermistor selected from among the plurality of thermistors to a reference resistor
Data Source
AI summary
An energy storage system includes a plurality of battery units; a plurality of thermistors detecting a temperature of the plurality of battery units; a multiplexer performing multiplexing on the plurality of thermistors, and connecting a thermistor selected from among the plurality of thermistors to a reference resistor; a power switch unit arranged between the reference resistor and a power voltage terminal; and a control signal input unit receiving a control signal applied to the multiplexer and the power switch unit, and receiving two or more control bits contained in the control signal. In the energy storage system, a temperature measurement operation is performed at a plurality of measurement positions, whereby a current state of a battery may be accurately detected, an entire circuit may be reduced and simplified, and low power consumption may be realized.