## 4 Conclusions  
In this study, the VARI technique was used to prepare carbon/glass sandwich hybrid composites faces with different confounding ratios, and then the carbon/glass mixed sandwich composite was prepared by bonding with AL honeycomb core, and the effects of the hybrid ratio on bending and low-velocity impact performance of the honeycomb battery housing were studied. The following conclusions were drawn:  
1. The hybrid ratio of carbon/glass hybrid composite materials has a significant impact on their mechanical properties. As the hybrid ratio increases, the bending property of the material increases first and then decreases. Compared to S-1, composite samples with different hybrid ratios show an increase of 22.20-47.85% (L direction) and 7.31-23.87% (W direction) in EA and 23.53-47.06% (L direction) and 12.50-31.25% (W direction) in SEA, reaching an optimal state when the hybrid ratio was 0.67.
2. The sandwich blending of carbon fiber and glass fiber can significantly improve the impact resistance of the sample. When evaluating the overall impact of the hybrid ratio on the impact properties of the samples, it was found that the impact performance at 0.67 was the best. Compared to the results at S-1, the EA increases by 12.44%, 19.56%, and 8.44%, respectively.
3. With the increase in the mixture ratio of carbon fiber and glass fiber, the impact resistance decreases at first and then increases. This is attributed to the fact that carbon fibers with higher mechanical strength are selected as the surface layer, which  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Mechanical Properties**} & \multirow{2}{*}{**Direction**} & \multicolumn{4}{c}{**Constants**} & \multicolumn{2}{c}{**Sum of Squares of the**} \\  & & **A** & **B** & **C** & **D** & **Correlation Coefficients** \\  & & & & & & **(R\({}^{2}\))** \\ \hline \multirow{2}{*}{Bending} & L & 0.1683 & 0.0746 & 0.2081 & \(-\)0.2134 & \multirow{2}{*}{0.99} \\  & W & 0.1584 & \(-\)0.0012 & 0.2568 & \(-\)0.2160 & \\ \multirow{2}{*}{Impact} & / & 0.0297 & 0.0099 & 0.0095 & \(-\)0.0170 & 0.97 \\ \hline \hline \end{tabular}
\end{table}
Table 4: Fitting constants for SEA.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline \multicolumn{2}{c}{**Hybrid Ratio**} & \multicolumn{2}{c}{**Direction**} & \multicolumn{1}{c}{**SEA (J/g)**} \\ \hline \multirow{3}{*}{0.67} & & L & 0.2544 \(\pm\) 0.0057 \\  & & W & 0.2127 \(\pm\) 0.0050 \\ \multirow{3}{*}{0.79} & & L & 0.2614 \(\pm\) 0.0052 \\ \cline{1-1}  & & W & 0.2245 \(\pm\) 0.0056 \\ \hline \hline \end{tabular}
\end{table}
Table 5: Comparison of SEA between samples with a hybrid ratio of 0.67 and optimum hybrid ratio.  
provides the main mechanical strength, absorbs a lot of energy, and protects the core layer of glass fibers from impact damage during the impact process. The bottom layer of glass fibers plays a role in stress transfer and bridging after the carbon fibers break.  
The current research remains at a preliminary stage, with limited application-specific testing on battery enclosures for new energy vehicles. Further electro-thermal validation experiments will be conducted in subsequent phases to address this critical aspect.  
Conceptualization, Y.H. and Y.Q.; methodology, Y.H.; validation, Y.L. and Y.H.; formal analysis, Y.H.; investigation, Y.Q.; resources, Y.Q.; data curation, Y.H.; writing--original draft preparation, Y.H.; writing--review and editing, Y.H.; supervision, Y.L.; project administration, Y.Q.; All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
The original contributions presented in this study are included in the article. Further inquiries can be directed to the corresponding author.  
The authors declare no conflict of interest.