Lithium battery temperature controlled short circuit test box

Temperature-controlled short-circuit test for lithium batteries

1. Test overview

The temperature-controlled short-circuit test for lithium batteries is a test method used to evaluate the safety performance of lithium batteries under short-circuit conditions, especially its thermal runaway behavior and temperature change. Short circuit is a kind of serious failure that Li-ion batteries may encounter in the course of use, which may lead to a large amount of heat generated inside the battery, and then trigger thermal runaway, or even fire or explosion. Through the temperature-controlled short circuit test, the short circuit situation in actual use can be simulated to evaluate the safety and stability of the battery under extreme conditions.

2. Purpose of the test

Evaluate the risk of thermal runaway: Evaluate the risk of thermal runaway of Li-ion batteries under extreme conditions by simulating a short-circuit situation.

Temperature change monitoring: Monitor the temperature change of the battery during the short-circuit process to determine its temperature rise rate and maximum temperature.

Safety verification: Verify the safety performance of the battery under different temperature conditions to ensure its reliability in actual use.

Design improvement: optimize the battery design and material selection according to the test results to improve the safety performance of the battery.

3. Test equipment

1.

Temperature control box: used to control the temperature of the test environment, usually adjustable from -40C to 150C. The temperature control box is used to control the temperature of the test environment.

2.

Short-circuit device: including low-resistance wires, relays and control systems to trigger a short circuit at a specified point in time.

3.

Temperature Sensors: Used to monitor surface and internal temperature changes in real time.

4.

Data Acquisition System: used to record temperature, current, voltage and other data, and generate test reports.

5.

Safety protection devices: including explosion-proof box, fire extinguishing system and emergency stop device to ensure the safety of the test process.

Frequently Asked Questions

Q1: What is the temperature range of a temperature controlled short circuit test?

A1: The temperature range of the temperature control box is usually from -40C to 150C, which can be adjusted according to different test requirements.

Q2: How is the short circuit device triggered?

A2: The short-circuit device is triggered by the control system at a specified point in time, usually by connecting the positive and negative terminals of the battery with low resistance wires.

Q3: What are the safety measures during the test?

A3: The test process is equipped with an explosion-proof box, fire extinguishing system and emergency stop device to ensure the safety of the test process.

Q4: How to analyze the test results?

A4: By analyzing the rate of temperature rise, maximum temperature and battery behavior, the risk of thermal runaway and safety of the battery are evaluated, and design and material improvements are made based on the results.

Q5: How to handle the battery after the test?

A5: After the test, the batteries are properly disposed of to avoid environmental pollution or safety hazards.