Battery module and battery pack

Abstract

The invention relates to the technical field of batteries, in particular to a battery module and a battery pack, the battery module comprises a module shell and a battery cell, a first containing cavity is formed in the module shell, a first end plate is arranged on one side of the module shell, a second end plate is arranged on the other side of the module shell, the battery cell is arranged in the first containing cavity, the battery cell comprises a battery cell shell, a battery cell upper cover and a roll core. The battery cell upper cover and the battery cell shell jointly form a second containing cavity, the roll core is arranged in the second containing cavity, at least one of the first end plate and the second end plate is provided with a module exhaust channel, the module exhaust channel is communicated with the first containing cavity and the outside of the module shell, and the module exhaust channel is communicated with the first containing cavity and the outside of the module shell. The cross sectional area of the module exhaust channel is gradually increased in the direction pointing to the outside of the module shell; and / or the battery cell upper cover is provided with a battery cell exhaust channel, the battery cell exhaust channel is communicated with the second containing cavity and the first containing cavity, and the cross sectional area of the battery cell exhaust channel is gradually increased along the direction pointing to the outside of the battery cell shell. The battery pack comprises the battery module and has good safety.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery module and a battery pack. Background technique [0002] Electric vehicles are recognized by more and more consumers due to their cleanliness, and the mileage of electric vehicles has become an important parameter affecting their use. The longer the driving range of an electric vehicle, the higher the energy density of the power battery, and while the high energy density brings high battery life, the safety of the battery cells in the battery module is also worse. The safety design of the existing battery modules is mainly designed for the safety of the chemical system of the battery cell. However, the safer chemical system often has lower energy density, that is, it cannot achieve satisfactory driving performance. Therefore, The safety design of existing battery modules cannot balance energy density and safety performance. Contents of the invention [0003] The p...

AI Technical Summary

Problems solved by technology

The safety design of the existing battery modules is mainly designed for the safety of the chemical system of the battery cell. However, the safer chemical system often has lower energy density, that is, it cannot achieve satisfactory driving performance. Therefore, The safety design of the existing battery modules cannot balance energy density and safety performance

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