Battery module

Abstract

The invention discloses a battery module, and relates to the technical field of batteries. The battery module comprises a plurality of stacked battery cells, two end plates positioned at two ends of the stacking direction of the plurality of battery cells, and two thermal insulation components, the two heat preservation assemblies are respectively attached between the two battery cells at the end parts of the plurality of battery cells and the adjacent end plates, the heat conductivity coefficient unit of each heat preservation assembly is W / (m.k), each heat preservation assembly is provided with a heat preservation surface attached to the corresponding battery cell, the area of each heat preservation surface is A, the unit of each heat preservation surface is mm < 2 >, and the area of each heat preservation surface is A along the connecting line direction of the two end plates. The thickness of the heat preservation assembly is L, the unit is mm, and the heat transfer between the battery cells and the end plates can be greatly slowed down by controlling the relationship among A and L, so that the temperature difference between the inner and outer battery cells of the battery module can be reduced, the consistency of the battery module is ensured, and the charge-discharge performance and the service life of the battery module are ensured.

Description

technical field [0001] The present invention relates to the technical field of batteries, and in particular, to a battery module. Background technique [0002] In the prior art battery module, an insulating sheet is placed between the end plate and the outermost cell to prevent a short circuit caused by direct contact between the cell and the end plate. However, since the end plate is usually made of an aluminum alloy material with high thermal conductivity (237W / (m*K)), the heat of the outermost cell of the module passes through the heat transfer path from the cell-insulating sheet-end plate to the The external emission leads to a large temperature difference between the outermost cell of the module and the inner cell, thus affecting the consistency of the battery. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a battery module with small temperature difference between inner and outer cells and high consistency. [0004] Embodiments...

AI Technical Summary

Problems solved by technology

However, since the end plate is usually made of aluminum alloy material with high thermal conductivity (237W / (m*K)), the heat of the outermost cell of the module passes through the heat transfer path from the cell-insulating sheet-end plate to the External emission, resulting in a large temperature difference between the outermost battery cells of the module and the internal battery cells, thus affecting the consistency of the battery

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