Battery Cell Thermistor Integration for Single-Wire Voltage Sensing
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Solution Overview
Problem
Existing battery systems require complex and separate measurement devices for cell voltage and temperature, which increases complexity and costs, and may lead to short circuits that affect battery performance and safety.
Innovation Solution
Integration of a thermistor within the battery cell housing, electrically connected to the cell terminals, allows for simultaneous measurement of cell temperature and voltage using a single wire interface, reducing complexity and preventing short circuits by providing high impedance resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate measurement devices are used for cell voltage and temperature, then measurement accuracy is improved, but device complexity and costs increase
Solution Approach 1:
The patent combines the temperature measurement function (thermistor) and voltage measurement function into a single integrated measurement device. The thermistor is electrically connected to the cell housing, which serves as both the temperature sensing element and the voltage reference point, eliminating the need for separate temperature and voltage measurement devices.
Solution Approach 2:
The cell housing is given multiple functions: it serves as the structural enclosure for the battery cell, as the reference potential for voltage measurement, and as the mounting point for the thermistor for temperature measurement. This multi-functionality reduces the number of separate components needed.
2Measurement precision
If separate measurement devices are used for cell voltage and temperature, then measurement accuracy is improved, but costs increase
Solution Approach 1:
The patent combines the temperature measurement function (thermistor) and voltage measurement function into a single integrated measurement device. The thermistor is electrically connected to the cell housing, which serves as both the temperature sensing element and the voltage reference point, eliminating the need for separate temperature and voltage measurement devices.
Solution Approach 2:
The cell housing is given multiple functions: it serves as the structural enclosure for the battery cell, as the reference potential for voltage measurement, and as the mounting point for the thermistor for temperature measurement. This multi-functionality reduces the number of separate components needed.
3Measurement precision
If separate measurement devices are used for cell voltage and temperature, then measurement capability is improved, but short circuit risk increases
Solution Approach 1:
The patent combines the temperature measurement function (thermistor) and voltage measurement function into a single integrated measurement device. The thermistor is electrically connected to the cell housing, which serves as both the temperature sensing element and the voltage reference point, eliminating the need for separate temperature and voltage measurement devices.
Solution Approach 2:
The cell housing acts as an intermediary element that provides both the electrical connection for voltage measurement and the mounting structure for the thermistor. This intermediary structure reduces the number of electrical connections required, thereby reducing potential points of failure and short circuit risk.
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 solution enables reliable, cost-effective, and simple monitoring of battery cell temperature and voltage, preventing short circuits and facilitating early detection of battery failures, thus ensuring optimal and safe battery operation.
Implementation Method 1
a thermistor integrated into the battery cell and electrically interconnecting the cell housing with at least one of the cell terminals
Implementation Method 2
an electrochemical cell capable of discharging by generating electrical energy from chemical reactions and charging by using electrical energy to cause chemical reactions
Data Source
Figure 1
Figure 2
AI summary
The present disclosure refers to a battery cell (12) of a battery system (10) for an electric vehicle, comprising a cell housing (13) encompassing an electrochemical cell, a positive electrode (14) and a negative electrode (16) forming cell terminals (14, 16), the battery cell (12) further comprising a thermistor (18) electrically interconnecting the cell housing (13) with at least one of the cell terminals (14, 16) and a connecting means (20) electrically connected to the cell housing (13) to determine an inside temperature of the battery cell (12).