Analysis of the mechanical properties of lithium batteries

Analysis of the mechanical properties of lithium batteries (1) Extrusion: Place a single battery in the middle of two extrusion planes, and gradually increase the pressure to 13kN. The extrusion direction of the cylindrical battery is perpendicular to the longitudinal axis of the cylindrical axis. The prismatic battery squeezes the wide and narrow sides of the battery. Each battery can only be charged once. The test results should meet the requirements of 4.1.2.1. Place a steel rod with a diameter of 15 cm on the battery pack, and squeeze the wide and narrow sides of the battery pack to 85% of the original size. Squeeze for 5 minutes. Each battery pack can only accept one squeeze. (2) Acupuncture: A single battery is placed in a steel fixture, and 3 mm ~ 8 mm steel nails are used to run in the direction of the battery perpendicular to the battery plate (the steel needle stays on the battery) for 90 minutes, or stop testing the surface of the battery The temperature is stable (the temperature difference is less than 2°C within 45 minutes). (3) Heavy impact: A single battery is placed on a rigid plane, and a steel rod with a diameter of 15.8mm is placed flat in the center of the battery. The longitudinal axis of the steel bar is parallel to the plane, and the weight of 9.1kg falls freely on the steel bar in the center of the battery from a height of 610mm; when a single battery is cylindrical, the impact direction is perpendicular to the longitudinal axis of the cylinder. When a single battery is square, it can only hit the wide and narrow sides of the battery once. (4) Mechanical influence: The battery or battery pack is fixed on the test equipment by rigid fixing (which can support all fixed surfaces of the battery or battery pack). Withstand an equivalent impact in each of the three vertical directions. At least one direction should be perpendicular to the surface of the battery or battery pack, and each impact should be carried out in the following way: In the first 3 ms, the small average acceleration should be 735 m/s2, and the peak acceleration should be 1225 m /s2 and 1715 meters/s2. (5) Vibration: Install the battery or battery pack directly or use a clamp to install it on the surface of the vibrating table for vibration test. The test conditions are 10Hz~55Hz, 29.4m/s2 acceleration, 10 sweeps in each direction of XYZ, and sweep rate of 1oct/min. (6) Free fall: A single battery or battery pack freely falls from a height of 600mm (low height) onto a hard board with a thickness of 20mm on the concrete floor, one in each direction XYZ. After free fall. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Introduce the 'memory effect' of Ni-MH and Ni-Cd batteries