Passive protection battery module structure and manufacturing method thereof

Abstract

The invention provides a battery module structure with passive security protection and a manufacturing method thereof and relates to the technical field of power battery PACK. In the passive protection battery module structure, battery cores in a battery module are separated by a fireproof and heat insulation spacer two by two; the spacer achieves an excellent heat insulation effect through the high-temperature foaming heat absorption characteristics of a mica plate and a fireproof and heat insulation coating, so that the risk of thermal runaway or the risk that an explosion-proof valve is opened due to the fact that the adjacent battery cores are overheated can be effectively delayed or avoided in extreme cases of overcharge and thermal runaway of individual battery cores in the module at a high temperature; and the time of the thermal runaway of the other adjacent battery cores can be greater than the time required for vehicle passengers to escape, thereby ensuring the life safety of the passengers.

Description

technical field [0001] The invention belongs to the technical field of power battery PACK, and in particular relates to a passive protection battery module structure and a manufacturing method thereof. Background technique [0002] With the popularization and promotion of power vehicles, safety has become the focus of more and more attention, especially ternary batteries, which have obvious advantages in energy density compared with iron-lithium batteries, but are not as safe as iron-lithium batteries. With the decline of subsidies for new energy vehicles, the newly released subsidy policy even links subsidies to the energy density of electric vehicle battery systems. The traditional iron-lithium batteries can no longer meet the increasingly high energy density requirements. [0003] Due to the strong chemical composition of ternary batteries, thermal runaway may occur at high temperatures above 120°C, and overcharging of batteries due to failure of the BMS management system...

AI Technical Summary

Problems solved by technology

With the decline of subsidies for new energy vehicles, the newly released subsidy policy even links subsidies to the energy density of electric vehicle battery systems. The traditional iron-lithium batteries can no longer meet the increasingly high energy density requirements.

[0003] Due to the strong chemical composition of the ternary battery, thermal runaway may occur at a high temperature above 120°C, and the BMS management system fails and the battery is overcharged, which may also cause accidents that endanger the safety of personnel.

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