Shell of assembly body for assembling lithium battery and metal frame

Abstract

The invention discloses a shell of an assembly body for assembling a lithium battery and a metal frame. The metal frame comprises two metal plates and screw rods, wherein the two metal plates are used for clamping a battery pack between the metal plates, through holes in pair are respectively and symmetrically formed in a region above the battery pack on the metal plates and are used for allowing the screw rods to prop against the battery and pass through each pair of through holes, nuts are screwed into the two end parts of the screw rods to form the assembly body, the shell comprises an upper shell cover and a lower shell, guide ribs are arranged on an internal longitudinal surface of the lower shell and is used for guiding an external longitudinal surface of the assembly body, longitudinal grooves are formed in the bottoms of the inner sides of the internal longitudinal surface and the external longitudinal surface and are respectively used for receiving the upper parts and the lower parts of the metal plates, and transverse grooves are formed in the bottoms of the inner sides of the internal longitudinal surface and the external longitudinal surface, are crossed with the longitudinal surface and are respectively used for receiving the screw rods above and below the battery pack so that certain gaps are maintained between the screw rods and the bottom of the corresponding transverse grooves. The battery assembled by the shell bears force by the metal frame and the shell, the impact from each direction can be buffered, the shock resistance is improved, and an arbitrary face can face upwards.

Description

Technical field: [0001] The invention relates to the field of lithium battery assembly, in particular to a case for assembling a lithium battery, and more particularly to a case for assembling an assembly of a lithium battery and a metal frame. Background technique: [0002] Electric or hybrid special vehicles need to start and run normally under extreme weather and environmental conditions, such as amphibious driving at a low temperature of -40°C or continuous bumps on harsh mountain roads. As we all know, the performance of lead-acid batteries is poor at -40°C, which cannot meet the start-up requirements, and the lead-acid batteries are heavy, and the design of the plastic shell structure is limited by the principle of lead-acid batteries. The performance of anti-vibration and drop resistance is poor. The low-temperature electrical performance of lithium-ion batteries is better than that of lead-acid batteries, and they are lighter in weight and more compact in size, but t...

AI Technical Summary

Problems solved by technology

[0004] Honeycomb assembly is often used in circular battery packs. The resin is molded into a support frame with receiving grooves, and each circular battery is assembled into the corresponding receiving grooves, but the resin will soften or melt at high temperatures, and at low temperatures It will become brittle or even cracked, which will destroy the matching accuracy with the battery and cannot adapt to a wide temperature range; in addition, when it is transferred to a prismatic battery, since the prismatic battery itself has a metal shell, the material of the metal shell and the resin The deviation of the thermal expansion coefficient of the material will also cause the mismatch under the temperature deviation; in addition, the honeycomb assembly requires the support frame to have a considerable thickness to ensure its support strength, which in turn causes the battery pack as a whole (including the battery pack, support frame, etc.) and housing) large volume and size

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