Bolting structure for fixing double-layer module

Abstract

The invention discloses a bolting structure for fixing a double-layer module. The bolting structure comprises battery modules, lower-layer module fixing screws and upper-layer module fixing screws. The lower ends of the battery modules are inserted into a base through positioning pins. Stepped holes are formed in the side walls of the battery modules. The battery modules disclosed by the invention are 12 square VDA standard modules fixed together and have the structure sizes of typical VDA modules, the battery modules are designed into an upper layer and a lower layer, each layer comprises 6modules, 24 lower-layer module fixing screws and 24 upper-layer module fixing screws, and after the lower layer of battery modules is installed, the upper surface is slightly higher than the upper surface of the lower layer of modules, and the upper surface of the lower layer of battery modules makes contact with the lower surface of the upper layer of battery modules and is used for supporting the upper layer of battery modules. The module fixing structure is standardized, the design of the double-layer module is simplified, and the space utilization rate in a battery pack is improved, so that the system energy density is improved. The bolting structure is simple and suitable for production on a production line.

Description

technical field [0001] The invention relates to the technical field of new energy vehicle batteries, in particular to a bolted structure for fixing double-layer modules. Background technique [0002] The implementation of the new energy vehicle subsidy reduction policy and frequent electric vehicle fire accidents are frustrating the confidence of consumers in replacing traditional fuel vehicles with electric vehicles. Whether electric vehicles are actually safe is once again a topic of widespread public debate. Partly due to the blind pursuit of battery energy density, the OEMs, PACK factories and battery cell factories that lacked safety considerations in the early stage of development are suffering from the bitter fruit of cruel market tests. However, improving the energy density of battery packs is the only feasible way to solve the public’s anxiety about cruising range under the existing conditions. Therefore, the development direction of continuously improving the ener...

AI Technical Summary

Problems solved by technology

As a result, the structural design is complicated, the cost is increased, and these additional parts reduce the grouping efficiency of the system. Whether the actual energy density of the whole package is really improved needs to be judged after a comprehensive evaluation.

At the same time, these add-ons reduce mass production efficiency

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