· Typically, thermal runaway has already occurred when the cell temperature sensor senses a rapid change in temperature, so it is important to pick out abnormal cells in time before then.

· Cell outlier detection through swelling force can quickly locate abnormal cells and adopt corresponding safety strategies.

· The test on the upper right shows that the time of the valve burst is about 965s from the start of charging, the time of the pressure identification point is 472s, and the temperature identification point is 1106s.

· Therefore, the expansion force data is 634s seconds ahead of the temperature to sense that the battery is about to run out of thermal.

The commercial value brought by TacSense products - SOC state of charge determination

· At present, the traditional SOC judgment is based on measuring the battery voltage, current, temperature, internal resistance and other parameters, and combining the model algorithm to achieve SOC estimation.

· The force dimension change rate is much higher than the voltage change rate, and the SOC estimation accuracy is further improved by introducing force dimension parameters, and the safety, reliability and service life of the battery are improved.

The commercial value brought by TacSense products - SOH health status determination

· The battery state of health (SOH) is the most important function of the battery management system, as an important indicator of whether the battery can continue to be used safely.

· The traditional SOH estimation method uses the charge/discharge method to calculate the SOC capacity, which cannot accurately calculate the current SOH.

· The increase in the expansion force of the battery is one of the important manifestations of battery aging, which can accurately diagnose the health status of the three SOHs.

Lithium precipitation is the excessive rate of local lithium deposition on the surface of the negative electrode.

Lithium evolution occurs on the surface of the negative electrode at the corresponding position (not in the internal graphite interlayer),

This is then recognized by the pressure change value feature

When there are heavy metal deposits or particulate impurities at the cathode,

An abnormal increase in irreversible pressure at a specific location is presented

When the use environment or working conditions are harsh, etc.,

As a result, the aging of the overall interface of the battery is accelerated.

When the irreversible thickening rate is abnormally large,

Pressures can be identified by absolute values and rates of change

The BFA model can identify the data features of the battery in the pre-development stage of the corresponding development and deterioration by taking advantage of the strong correlation between stress and failure mechanism characteristics, and complete the extraction and identification of the corresponding feature structure, which greatly improves the continuity and accuracy of the calculation results of the corresponding model.

The commercial value brought by TacSense products - iBMS remote diagnosis

More flexible adaptation to the future iBMS solution, the health of each cell is monitored throughout the life cycle, and reported to users and data centers

· Number management and safety management in battery cell warehousing and logistics

· Feedback of information such as the real SOH of the battery cell during cascade utilization, and actively report the information

· Real-time data monitoring of energy storage or automotive systems, and active information reporting

storage

First Life (Electric Car)

Second Life (Energy Storage)

Significant security improvements during storage

Thermal runaway management is better, and SOC and SOH are more accurate

Reusable electronics

The value of all first lives

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Industrial and new energy pressure distribution measurement equipment: Mr. Chen 18026916463
Application in various industries of consumer electronics: Mr. Chen 13823378048
Lithium battery lifecycle system: 0755-86535421

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Industrial and new energy pressure distribution measurement equipment：Mr. Chen 18026916463

Application in various industries of consumer electronics：Mr. Chen 13823378048

Lithium battery lifecycle system：0755-86535421

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