The emergence of any thing and product is because it has advantages that other things cannot match, so the power battery detection is no exception. Here we will introduce the power battery test in detail, and follow the editor to learn about it. Hope to help everyone.
power battery and power battery testing requirements are mainly divided into: mechanical safety, environmental safety and electrical performance safety. Among them, mechanical safety is divided into vibration, mechanical impact, drop, overturning, simulated collision, extrusion, etc.; environmental safety includes temperature shock, damp heat cycle, seawater immersion, external fire, salt spray, high altitude; electrical performance safety involves over temperature protection, short circuit protection, over charge protection, over discharge protection. In terms of safety, the probability of problems in the detection of monomer and module drop, over discharge, seawater immersion, temperature cycle and low air pressure is very small, while overcharge, short circuit and extrusion, overheating, especially the battery module. The battery pack is mainly prone to vibration extrusion, seawater immersion and salt spray. The new subsidy program requires energy density testing. Allows testing of individual packages and systems, but needs to include high-voltage lines and connecting lines. Therefore, we recommend that companies choose to use the power battery detection system test.
In addition, the subsidy also requires fast charging rates, allowing testing using a single package or system. In the case of single-packet measurement, in the case of parallel connection, the system of the same capacity can be represented by a single packet. If it is different, replace the entire system with the one with very low energy density in a single pack. At the same time, the total capacity error is required to be ± 5%, the quality error is ± 5%, and the total error energy declared by vehicle manufacturers and battery system enterprises is ± 5%. The main engine factory of power battery testing should have a good communication with the battery system manufacturer without any mistakes. In addition, there is a parameter called the model of the unit. Since there is no model of the unit in the system test of power battery detection, different situations may occur. Therefore, the control unit in the battery pack must be consistent with the vehicle declaration.
In power battery detection, thermal runaway expansion, heating, overcharge and other three ways need to be detected. Lithium titanate is not easy to pass. At present, in order to consider the energy density of the two types of automobiles and logistics vehicles, a large number of ternary materials are used, but it may be quite difficult to expand the thermal runaway of ternary materials. Therefore, we suggest that businesses should be prepared for both.