Movable Non-Contact Sensor for Battery Temperature Deviation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional temperature measurement methods for secondary batteries during charging/discharging in the formation process and capacity tests fail to accurately measure temperature deviations between individual batteries, leading to inaccuracies in capacity calculations due to insufficient cooling and the inability to reflect temperature differences specific to each battery.
Innovation Solution
A temperature measurement device utilizing non-contact temperature sensors and transfer devices that move along the X, Y, and Z axes to measure the temperature of each secondary battery individually, allowing for precise temperature measurement and correction in capacity tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a thermocouple is used to measure temperature in the tray, then the atmosphere temperature can be measured, but the temperature deviation between individual secondary batteries cannot be detected
Solution Approach 1:
The patent divides the temperature measurement function into multiple independent non-contact temperature sensors, with each sensor dedicated to measuring the temperature of a specific secondary battery. This segmentation allows each battery's temperature to be measured independently, capturing temperature deviations between individual batteries that a single tray-level thermocouple cannot detect.
Solution Approach 2:
The patent replaces the contact-based thermocouple measurement system with a non-contact temperature sensor system. This substitution eliminates the need for physical contact with each battery, allowing for easier individual battery temperature measurement while maintaining measurement accuracy and capturing temperature deviations across multiple batteries.
2Measurement precision
If multiple non-contact temperature sensors are provided for each secondary battery, then individual temperature measurement is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent employs movable non-contact temperature sensors that can dynamically adjust their positions to measure different secondary batteries. Instead of having fixed sensors for each battery position, the sensors can move to different locations, reducing the total number of sensors needed while still achieving individual battery temperature measurement capability.
Solution Approach 2:
The non-contact temperature sensors are designed to serve multiple functions: they can measure temperatures of different secondary batteries at different positions and times. This multi-functionality reduces the need for dedicated sensors for each battery, thereby reducing overall device complexity and cost while maintaining the ability to detect individual battery temperature deviations.
3Productivity
If high rated charging is performed at higher C-rate, then process time is reduced, but heat generation and temperature deviation between batteries increase
Solution Approach 1:
The patent implements a feedback system where non-contact temperature sensors continuously monitor the temperature of each secondary battery during high-rate charging. The measured temperature data is fed back to the control system, which can then adjust charging parameters or cooling operations to manage temperature deviations, enabling safe high-rate charging while maintaining temperature control.
Solution Approach 2:
The use of non-contact temperature sensors enables real-time temperature monitoring during high-rate charging without interfering with the charging process. This allows for accurate detection of temperature deviations that occur during fast charging, providing data necessary for thermal management while maintaining high charging speeds.
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 accurate temperature measurement and correction for each secondary battery, improving the accuracy of capacity tests by accounting for temperature deviations and reducing the number of necessary sensors, thus enhancing the efficiency of the measurement process.
Implementation Method 1
a non-contact temperature sensor unit being insertable into a spacing between adjacent secondary batteries of the plurality of secondary batteries to measure the temperature of the at least one secondary battery that the non-contact temperature sensor unit faces in a non-contact manner
Data Source
AI summary
A temperature measurement device suitable for measuring the temperature of each secondary battery to consider a temperature deviation between secondary batteries that may occur during charging/discharging in the formation process and capacity test after the secondary battery assembly process, and a charge/discharge apparatus including the temperature measurement device are provided. The temperature measurement device is for measuring a temperature of at least one of a plurality of secondary batteries arranged along an X-axis direction, spaced apart from one another, in a standing position, and includes a non-contact temperature sensor unit which is insertable into a spacing between adjacent secondary batteries to measure the temperature of the secondary battery that the non-contact temperature sensor unit faces in a non-contact manner, and a Z-axis transfer device which inserts the non-contact temperature sensor unit into the spacing downward from above the secondary batteries in a Z-axis direction.