Battery pack shell

[0016] In order to further illustrate the technical means and effects adopted by the present invention, the following detailed description is given in conjunction with the preferred embodiments of the present invention and the accompanying drawings.

[0017] see figure 1 , the present invention provides a battery pack casing, comprising: a battery pack box body 1 and a battery pack bottom plate 2 arranged opposite to the battery pack box body 1, the battery pack box body 1 is made of carbon fiber reinforced unsaturated resin and The magnesium-aluminum alloy composite material covered by the glass fiber composite material, the material of the battery pack bottom plate 2 is a carbon fiber reinforced titanium-clad magnesium-aluminum alloy composite material.

[0018] Among them, the magnesium-aluminum alloy composite material covered by carbon fiber reinforced unsaturated resin and glass fiber composite material and the carbon fiber reinforced titanium-clad magnesium aluminum alloy composite material can make the battery pack shell have sufficient strength, and the carbon fiber reinforced unsaturated resin and glass fiber The magnesium-aluminum alloy composite material covered by the composite material makes the battery pack box have super corrosion resistance, and the carbon fiber reinforced titanium-clad magnesium-aluminum alloy composite material also has thermal conductivity, which can make the internal heat generated during the use of the battery pack timely. It is discharged from the bottom plate 2 of the battery pack to prevent the battery pack from overheating, thereby ensuring that the battery pack is in a normal working state.

[0019] Specifically, see also Figure 1-3 , the battery pack box 1 is in the shape of a shell, and the battery pack box 1 is provided with a placement portion 11 for accommodating the battery module 3 of the battery pack. The battery modules 3 are encapsulated in such a way that the organic silica gel 7 is filled between the battery modules 3. After the organic silica gel 7 is cured, it can perform shock absorption protection, so as to reduce the impact on the internal battery module 3 when the battery pack box 1 is impacted. The edge of the bottom surface of the battery pack box 1 is provided with several evenly distributed raised portions 12 to ensure that the battery pack box 1 is placed stably in the electric vehicle.

[0020] The side of the battery pack box 1 is provided with a hollow portion 13 for allowing the connector 6 connected to the battery module 3 to pass through and extend to the outside of the battery pack casing. In this preferred embodiment, the inner wall of the battery pack box 1 is provided with 14 evenly distributed connecting portions 14, the connecting portions 14 are respectively provided with threaded holes 15, and the bottom plate 2 of the battery pack corresponds to all the connecting portions 14. Fourteen through holes 24 are respectively provided at the positions of the connecting portions 14 , and the battery pack box 1 and the battery pack bottom plate 2 are fixed together by screws, so as to realize the protection of the battery module 3 .

[0021] In the preparation process of the carbon fiber reinforced titanium-clad magnesium-aluminum alloy composite material, the method for modifying the surface of the carbon fiber can be a vapor deposition method or a liquid sodium method.

[0022] To sum up, a battery pack casing of the present invention uses a magnesium-aluminum alloy composite material covered by a carbon fiber reinforced unsaturated resin and a glass fiber composite material and a carbon fiber reinforced titanium-clad magnesium-aluminum alloy composite material, so that the battery pack casing has Sufficient strength, good thermal conductivity and superior corrosion resistance, thereby improving the performance of the battery pack.

[0023] As mentioned above, for those of ordinary skill in the art, various other corresponding changes and deformations can be made according to the technical solutions and technical concepts of the present invention, and all these changes and deformations should belong to the protection scope of the claims of the present invention .