Lithium ion battery flame-retardant and explosion-proof device and method for electric automobile

Abstract

The invention discloses a lithium ion battery flame-retardant and explosion-proof device and method for an electric automobile. The lithium ion battery flame-retardant and explosion-proof device comprises a signal acquiring module, a signal processing module and a control terminal part, wherein the signal acquiring module comprises temperature sensors and position sensors which are distributed in different functional regions in a battery box; the signal processing module is used for receiving acquired signals transmitted by the temperature sensors and the position sensors, and transmitting a control signal to a control terminal according to processing results of the acquired signals; the control terminal comprises a physical cooling module, an overcurrent and short-circuit working condition management module and a battery collision/extrusion management module; the physical cooling module comprises fans and a fan power supply system, wherein the fans are arranged in different functional regions in the battery box; the overcurrent and short-circuit working condition management module comprises a battery box safety circuit starting module and two redundant direct-current contactors arranged on a main loop in the battery box; and the battery collision/extrusion management module comprises a module for controlling the direct-current contactors to be switched off, a compressed dry ice air bag and an ejection system of the compressed dry ice air bag.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant and explosion-proof batteries, and relates to a flame-retardant and explosion-proof device and method for lithium-ion batteries used in electric vehicles. Background technique [0002] With the rise of new energy vehicle technology research, especially the country's pure electric vehicle as a key research direction, the application of grouped rechargeable batteries, especially lithium-ion batteries, as a power source will become more and more extensive. In the application process of the battery pack, not only the dynamic monitoring of the battery status is required, but also the effective management of the safety of the lithium-ion battery pack under extreme working conditions is required, and the control and protection module operates under different working conditions, so as to control the battery system and the whole vehicle. and the safety of drivers and passengers. [0003] Thermal m...

AI Technical Summary

Problems solved by technology

The disadvantage is that the structure is complicated and the cost is high. The existence of cold and heat exchange wiring affects the battery wiring and layout in the battery box. It has certain safety hazards and slow heat dissipation.

There is also the problem that the battery cannot be managed in time to burn and explode under extreme working conditions, and the protection is unreliable

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