Method for determining the density of filling materials for battery packs under impact
A technology for filling materials and determining methods, applied in electrical digital data processing, instrumentation, design optimization/simulation, etc., to achieve the effect of healthy deformation mode
Active Publication Date: 2022-05-06
SUN YAT SEN UNIV
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Problems solved by technology
The above studies on battery packs are all conducted at specific speeds. However, in reality, battery packs will suffer impact accidents with different impact energies, and the speed has a huge impact on the behavior of single batteries. Therefore, battery packs at different speeds Or the behavior and failure mechanism under different impact energies need further research
Method used
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Embodiment 1
[0043] Such as figure 1 As shown, in the finite element software, there are 5 rows of battery models as a battery model group, 1, 3, and 5 rows have 5 battery models, 2, 4 rows have 4 battery models, and all battery models are contacted. It is 2D Automatic Surface to Surface; the battery model is a plane strain unit of Crushablefoam, the thickness is 1mm, and the density is 2700kg / mm 3 . Place a rigid board on the top, bottom, left, and right sides of the battery model group. The distance between the left and right rigid boards is equal to the sum of the widths of n battery models side by side. The thickness of the upper and lower rigid boards is equal to the thickness of the battery model. The height between the upper and lower rigid boards is greater than the The height of the battery model group is described, the rigid plates on the bottom, left, and right are fixed constraints, and the rigid plate above has degrees of freedom in the Y direction; the rigid body plate uses ...
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Abstract
The present invention relates to the technical field of battery packaging experiments, and more specifically, to a method for determining the density of filling materials for battery packs under impact. This method proposes a new type of protection for battery packs filled with metal foam. The large deformation under compression between the cells results in a specific area of tensile failure, making its deformation pattern healthier. Second, under different energy impact simulations, the metal foam reduces the impact energy transferred to the battery by 20%‑40%, and reduces the number of failed batteries by up to 80%. At the same time, the study found that the protection effect of the battery pack is closely related to the density of the metal foam and is non-linear. Using harder or softer metal foam is not necessarily beneficial to the protection effect. The metal foam needs to be balanced with the density of the battery model.
Description
technical field [0001] The invention relates to the technical field of battery packaging experiments, and more particularly, to a method for determining the density of a filling material for a battery pack under impact. Background technique [0002] In recent years, new energy vehicles have gradually developed, and because of its environmentally friendly energy and low-cost energy consumption, people are increasingly accepting it. But along with this advantage, the disadvantage that the battery is easy to be damaged under various accidents and cause accidents such as fire has also appeared. Studies have found that the battery will cause an internal short circuit under large deformation, and it is likely to cause a fire or explosion. Therefore, for the development of the automobile industry, it is very important to strengthen the safety of the battery pack inside the car and prevent major accidents. [0003] At present, many research teams at home and abroad have made diffe...
Claims
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IPC IPC(8): G06F30/23G06F119/14
CPCG06F30/23G06F2119/14
Inventor 胡玲玲张子文周名哲
Owner SUN YAT SEN UNIV