When the battery is clamped and a constant force is applied, the battery will expand with the repeated charging and discharging of the battery, while the force of the testing machine remains unchanged to obtain the expansion size data.

After clamping, the position can also be selected to remain unchanged. The automatic force application of the testing machine is balanced with the expansion force of the battery, and the expansion force data is recorded.

Multi step mode, force cut-off or displacement cut-off can be selected, or multiple cut-off conditions can be selected at the same time. This step can be completed when any one of them is satisfied first.

The amount of force deformation and voltage can be recorded to form excel tables and graphs, and the highest peak value can be automatically identified.

The variable rate sampling method can be used for long-term continuous test, and the data of 6 months can be recorded.