Battery Cell Pressure Simulation With Fluid Temperature Control
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Solution Overview
Problem
Conventional pressure measurement devices for battery cells are bulky and limit spatial evaluation, and fail to simulate load and temperature conditions of actual battery modules.
Innovation Solution
A battery module simulation system with a case, charge/discharge unit, fluid supply unit, temperature controller, and sensor unit, which applies pressure and temperature to battery cells through fluid-filled tubes, allowing for pressure and temperature control and measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pressure measurement devices are used for battery cells, then pressure measurement capability is achieved, but device weight and volume increase, limiting spatial evaluation
Solution Approach 1:
The patent uses a soft copy (flexible printed circuit board with pressure-sensitive resistors) instead of a hard copy (conventional rigid pressure measurement device). This allows the pressure measurement function to be integrated into a thin, lightweight structure that conforms to the battery cell surface, eliminating the need for bulky external measurement equipment while maintaining measurement capability.
2Measurement precision
If conventional pressure measurement devices are used, then pressure measurement is possible, but the device cannot simulate load and temperature conditions of actual battery modules
Solution Approach 1:
The flexible printed circuit board integrates multiple functions: pressure measurement through pressure-sensitive resistors, load simulation through adjustable spring pressure, and temperature control through heating elements. This multi-functional design allows a single device to simulate actual battery module operating conditions while performing pressure measurement, eliminating the need for separate measurement and simulation equipment.
Solution Approach 2:
The patent combines pressure measurement, load application, and temperature control functions into a single integrated flexible printed circuit board assembly. The pressure-sensitive resistors, springs, and heating elements are all merged into one device that contacts the battery cell simultaneously, enabling comprehensive simulation and measurement in a unified system.
3Measurement precision
If dedicated pressure measurement equipment is used, then accurate pressure measurement is achieved, but spatial limitations prevent comprehensive battery evaluation
Solution Approach 1:
The patent employs a flexible printed circuit board as a thin-film structure that can conform to the battery cell surface. This flexible substrate carries pressure-sensitive resistors and other components in a distributed arrangement, allowing the measurement system to adapt to the battery's geometry without requiring large measurement spaces or rigid positioning structures.
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
Enables easy simulation of load and temperature conditions in battery modules, facilitating accurate pressure measurement and evaluation.
Implementation Method 1
a fluid supply unit which is fluidly connected to the tube, and supplies a fluid to the tube to thereby apply pressure to the battery cell
Implementation Method 2
a temperature controller which controls a temperature of the fluid which has flowed into the tube
Implementation Method 3
a sensor unit which is disposed between the tube and one surface of the case and measures a pressure inside the case
Data Source
Figure 1
Figure 2
AI summary
The present invention relates to a battery module simulation system and method for easily implementing pressure and temperature conditions in a battery module by easily changing the pressure and temperature applied to a battery cell in a pressure measurement test of the battery cell.