Battery Cell Compression Fixture for Low-Voltage Defect Detection

The patent applies preliminary action by compressing the energy storage cell before electrical safety testing. The compression device pre-compresses the cell to a predetermined compression amount, which reduces the distance between foreign bodies and electrodes, making defects more detectable during subsequent low-voltage testing. This preliminary mechanical preparation enhances measurement precision without requiring complex high-voltage testing equipment.

The patent changes the physical state parameters of the energy storage cell by applying mechanical compression. The compression amount is controlled within a specific range (10%-30% of the cell's height) to alter the spatial relationships inside the cell, bringing contaminating particles closer to electrodes. This parameter change enables effective defect detection at lower voltages, reducing device complexity and safety risks.

The compression device performs preliminary mechanical compression before electrical testing, which reduces the clearance between foreign bodies and electrodes. This preliminary action creates a more favorable testing condition where defects can be detected at lower voltages, thereby maintaining reliability while reducing the harmful effects of high-voltage testing.

The patent replaces part of the electrical testing mechanism with a mechanical compression system. Instead of relying solely on high-voltage electrical testing to detect defects, the system uses mechanical compression to pre-position foreign bodies closer to electrodes, enabling effective detection at lower voltages and reducing the reliance on high-voltage systems that pose safety risks.

The patent carefully controls the compression parameter within a specific range (10%-30% of the cell's height) to simulate swelling conditions without causing structural damage. This controlled parameter change allows the cell to be compressed enough to bring foreign bodies closer to electrodes for better detection, while maintaining the cell's structural integrity through predetermined compression limits.

The patent applies partial compression rather than full compression, using a controlled compression amount that is sufficient to simulate swelling and improve defect detection, but limited to avoid structural damage. The compression is applied partially to the cell's height, balancing the need for improved measurement precision with the need to preserve cell strength.