Project Case | Chongguang Successfully Delivered a Custom Soft-Package Battery Thermal‑Cycling Test Rig to a Research Institution (for Studying the Correlation Between Battery Gas‑Generation Behavior and Lifespan)

Release date: 2025-12-08

Summary: In the arena of power‑battery R&D, temperature is never merely an environmental parameter; it is a precise measuring instrument, tracing the subtle, hidden trajectories of battery aging and gas evolution across a broad range—from −20°C to 150°C.

In the arena of power‑battery R&D, temperature is never merely an environmental parameter; it is a precision instrument that, across a broad range from –20°C to 150°C, maps every subtle curve of battery aging and gas evolution.

Recently, our company successfully delivered a custom-designed thermal cycling chamber for high- and low-temperature testing of pouch‑type batteries to a research institution. The product’s performance has been highly praised by the customer.

Thermal cycling test chamber for pouch cells

Today, we turn our attention to the mastermind behind this sophisticated experiment—the high‑precision temperature‑controlled thermal stage—exploring how it leverages an extraordinary 0.1°C accuracy and programmable multi‑step temperature profiles to decode every subtle “breath” of a pouch‑cell battery under extreme conditions.

Precision Temperature Control: From “Simulating the Environment” to “Programming Destiny”

Our thermal‑shock chamber transcends the limitations of conventional environmental chambers. With an expansive temperature range from –20°C to 150°C, it encompasses virtually all critical scenarios—spanning the extreme cold of the Arctic to the precursors of battery thermal runaway.

Its core capabilities lie in a temperature-control accuracy of 0.1°C and computer-software‑driven PID control, which ensure that, even during rapid temperature changes, the internal reactions of battery samples are governed by the intrinsic material chemistry rather than by noise introduced by temperature fluctuations.

-20~150℃ temperature experiment shows excellent fitting performance

The real breakthrough lies in the ability to freely edit multi-segment temperature profiles. Researchers can essentially script a “temperature scenario”:

Simulate real-world operating conditions: Accurately replicate the complex scenarios of a vehicle rapidly cooling after exposure to intense summer heat, or quickly warming up following a cold winter start.

Design of an accelerated aging test: Over several weeks, cyclic high–low temperature exposure and stepped heating–cooling protocols are employed to simulate the cumulative effects of years of use.

Triggering specific reactions: Precisely controlling the residence time and rate of change within a given temperature range to induce and observe targeted gas‑generation reactions.

Gases, Bulging, and Lifetime Degradation: “Revealed” Under Programmed Temperature Conditions

When a battery is cycled under a carefully designed temperature profile, its internal degradation processes are accelerated and amplified. Side reactions such as electrolyte decomposition, solid–electrolyte interphase (SEI) film growth and reconstruction, and oxygen evolution at the cathode generate characteristic gases like CO₂, H₂, and C₂H₄, leading to battery swelling.

Working Principle of All-Solid-State Batteries

The function of the hot-and-cold stage is to provide a clear, controllable observation window for this series of complex reactions.

Key experimental insights: In a study on high-nickel ternary pouch cells, we employed a multi‑step cycling protocol that includes “85°C high‑temperature storage (triggering accelerated electrolyte decomposition) → rapid cooling to 0°C (to monitor SEI film stress evolution) → stepwise heating to 120°C (approaching the thermal runaway threshold).”

Through synchronized measurements, it was found that within the 90–110°C range, the rate of C₂H₄ gas evolution caused by DMC solvent decomposition exhibits a distinct stepwise increase in tandem with battery thickness expansion. This “temperature–gas–deformation” correlation provides direct evidence for defining the safe operating upper limit of batteries in this system.

Core Value: How Data Drives End-to-End Battery Chain Optimization

This high-precision, programmable temperature‑controlled testing offers value at every stage of battery research and development as well as in practical applications:

Material formulation screening: Rapidly evaluate the gas‑generation behavior of various electrolyte additives and binders under extreme temperatures to identify the most stable formulation.

Cell Design and Process Validation: Identify packaging or electrode‑sheet design defects that cause nonuniform swelling and gas accumulation.

BMS Algorithm Calibration: The generated gas‑generation model, coupled with temperature‑dependent data, can be directly applied to optimize the battery management system’s thermal management and life‑prediction algorithms, thereby enhancing the accuracy of early‑warning systems.

Safety boundary definition: Precisely identify the temperature thresholds at which various severe side reactions occur, providing critical input for the vehicle’s thermal safety design.

From the freezing point of −20°C to the critical threshold of 150°C, every degree is precisely defined by software, and the generation of each gas stream is meticulously correlated. Our thermal‑cycling system is more than just a temperature‑control device; it is a critical enabler that codifies testing logic, unveils failure mechanisms, and ultimately extends battery life while enhancing safety.

Welcome to discussions and collaborations.

For information on specific technical specifications or to discuss experimental protocols, please feel free to contact us. We look forward to collaborating with you to explore the uncharted frontiers of materials.

Manager Peng 13100616637 (Huazhong Region)

Manager Peng 18871633576 (East China region)

Manager Wang 18171289006 (Southwest and South China)

Manager Li 18502799852 (Other regions)

Keywords: Project Case | Chongguang Successfully Delivered a Custom Soft-Package Battery Thermal‑Cycling Test Rig to a Research Institution (for Studying the Correlation Between Battery Gas‑Generation Behavior and Lifespan)

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Products suitable for this type of application

Electrochemical Heating and Cooling Stage

TES120S-EC,TS300S-EC

The electrochemical temperature‑controlled stage is suitable for a wide range of electrochemical experiments, including studies on button cells, lithium batteries, electrocatalysis, fuel cells, and more. It can be integrated with Raman spectroscopy, XRD, and other analytical instruments to monitor material transformations during electrochemical reactions.

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