A collision protection device for a power battery pack

Abstract

The present invention provides a collision protection device for a power battery package, which includes a first mounting plate and a second mounting plate, the first mounting plate is placed above the second mounting plate, and the second mounting plate is placed along the The lower surface of the first mounting plate slides and is fixed to the sub-frame, and the second mounting plate is connected to the vehicle body frame. Among them, the main function of the first mounting plate (that is, the upper mounting plate) is to establish a plane at the bottom of the vehicle, and the main function of the second mounting plate (lower mounting plate) is to separate from the vehicle body after colliding with an obstacle. Thereby, a sliding "roller" is formed between the obstacle and the whole vehicle, and the whole vehicle and the obstacle are formed to slide. Through the whole sliding and friction process, the impact force is continuously changed and reduced.

Description

technical field [0001] The invention relates to the field of power batteries of electric vehicles, in particular to a collision protection device for a power battery package. Background technique [0002] As energy and environmental issues become the focus of attention on a global scale, new energy vehicles represented by electric vehicles have become one of the important directions of the development of the automobile industry due to their obvious advantages of cleanliness and environmental protection, and have begun to enter a period of rapid development . [0003] In order to maintain the mass balance between the front and rear of the vehicle, the power battery of an electric vehicle must generally be arranged at the bottom of the vehicle. , when an obstacle is encountered during driving, it is very easy to collide with the casing of the power battery, which may cause damage to the power battery package. [0004] The direct collision of the power battery package may cau...

AI Technical Summary

Problems solved by technology

[0003] In order to maintain the mass balance between the front and rear of the vehicle, the power battery of an electric vehicle must generally be arranged at the bottom of the vehicle. , when an obstacle is encountered during driving, it is very easy to collide with the casing of the power battery, which may cause damage to the power battery package

[0004] The direct collision of the power battery package may cause the extrusion of the battery module inside the package or the damage of the connecting piece between the battery cells (such as movement, extrusion, cracking, leakage, fire and explosion, etc.), which may further Mechanical damage, electrical damage, chemical damage, and combustion damage to the occupants (such as the electrolyte inside the battery cell flowing out and flowing into the cockpit) pose a huge hidden danger to the safety of the vehicle

[0005] At present, in order to protect the safety of the power battery, the power battery system of the whole vehicle strives to strengthen the outer shell structure of the entire battery pack so that it can protect the safety of the internal battery under sudden collisions. First, it is different from the front-end collision of the whole vehicle. , the obstacles hit by the underpinning collision of the power battery package are mostly small and sharp, so it is difficult to ensure that the power battery package is not damaged by the collision when the mass of the vehicle is running at a certain speed; secondly , increasing the thickness of the battery pack will obviously increase the volume and weight of the entire battery pack under the same conditions, which will affect the economy of the vehicle; in addition, for a direct impact on the battery system, even if the battery pack itself does not directly Damaged, but due to the decomposition without force, there will be a large vibration acceleration, which is likely to affect the connection between the internal battery cells

Moreover, even if the existing anti-collision scheme is used to ensure the safety of the entire battery pack after the collision, the outer casing after the collision will inevitably cause damage, and the replacement or maintenance of the outer casing will also increase additional costs.

Images