Output pole piece and battery module

Abstract

The invention relates to an output pole piece and a battery module. The output pole piece comprises a first metal piece; the first metal piece comprises a first area and a second area which are distributed in succession along a first direction; the first area comprises a first overflowing part and a second overflowing part which are distributed in succession along a second direction and are mutually connected, the second direction is intersected with the first direction, and the second area is connected with the first area through the first overflowing part; wherein the first overflowing partis provided with a through hole which goes deep along the thickness direction, the projection, along the first direction, of the through hole does not exceed the projection, along the first direction,of the second area in the second direction, and the first metal piece forms a minimum overflowing cross section at the through hole so as to enable the minimum overflowing cross section to fuse in advance when electric current, which flows through the first metal piece, is greater than preset electric current. The output pole piece provided by the embodiment of the invention can meet requirementson electric energy output and input and can guarantee the safety of a battery system in the module scale.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an output pole piece and a battery module. Background technique [0002] At present, the development of the electric vehicle market and technology has attracted much attention, and the competition has become more and more fierce. In particular, the reliable guarantee of safe operation of the whole vehicle and high cost performance have increasingly become synonymous with the core competitiveness of the electric vehicle industry. The power battery system is the assembly most directly related to these two aspects in the electric vehicle, so solving the safety and low-cost problems of the power battery system is the core challenge at present. [0003] In the prior art, solving the safety and low-cost problems of the power battery system generally includes the following two aspects: one is to design a general insurance on the main circuit of the battery pack system to prevent overl...

AI Technical Summary

Problems solved by technology

When the module is in the assembly and manufacturing process, the battery pack assembly process, and the post-maintenance stage, once the external short circuit of the module level is caused by human error, or when the vehicle is in operation due to the wear of the wiring harness between the internal modules or the vehicle collision extrusion When the module-level external short circuit is caused later, the module-level external short circuit in these two aspects cannot be covered and solved by the general insurance components designed on the main circuit of the battery pack system, especially for the soft pack module, because the soft pack monomer Due to the layout of the structural space in the battery, it is impossible to design an insurance structure at the level of the single battery like a square shell single battery, so once the module formed by the soft pack single battery is short-circuited, all the single batteries in the module will be damaged. Any fuse protection can easily lead to serious safety problems such as thermal runaway or even explosion of the single battery in the module

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