In the early stage architecture development of the pure electric vehicle project, how to reasonably arrange the integrated power lithium-ion battery pack is crucial. The specific work elements, including ground clearance, trafficability, collision safety and power demand, are introduced separately below.

1. Requirements for battery ground clearance

Under the condition that the lower surface of the battery is protected by structural parts, the following conditions shall also be met: under the condition of maximum jump, a certain clearance shall be ensured between the battery and the ground; Ensure competitive ground clearance under full load; The battery RESS shall be protected in the positive direction; The battery RESS arrangement shall not be lower than the lowest surface of the surrounding body structure.

https://www.nxbtx.com/other_im/    2. Restrictions of man-machine layout in passenger compartment on the size of battery in Z direction

It can be seen from the man-machine layout of an electric vehicle project that there are 9 engineering indicators to be considered in the Z-direction latitude, specifically the distance H5 from the passenger's H-point to the ground, the passenger's sitting height H30, the head space H61, the distance H8 from the heel point to the ground, the Z-direction thickness of the battery pack, the battery pack's ground clearance, the vehicle height H100, the distance from the upper surface of the lithium-ion battery pack to the upper surface of the floor, and the thickness of the carpet and sound insulation cotton. Therefore, the height of the car body is limited according to the modeling requirements. According to the human-machine layout requirements, the Z-direction size limit surface of the battery pack can be deduced.

3. Limitation of collapse space on battery size in Y direction

Since the working voltage of the battery is generally greater than 300? The high voltage of V and the high corrosivity of the electrolyte in the battery cell make it necessary to set a reasonable safety collapse gap when arranging the lithium-ion battery pack in the vehicle, especially in the case of side impact. The reasonable design of the lateral collapse distance from the battery to the sill plate shall be obtained by means of CAE iterative analysis for specific vehicle models.