Battery box

Abstract

The invention discloses a battery box which comprises a box body and a plurality of battery units, wherein the box body has a closed mixed gas accommodating cavity and a closed battery accommodating cavity; the mixed gas accommodating cavity is positioned on one side of the battery accommodating cavity; a battery unit is arranged in the battery accommodating cavity and comprises a safety valve; the mixed gas accommodating cavity has a gas inlet and a gas outlet; the gas inlet is communicated with the safety valve, and the gas outlet is communicated with the atmosphere outside the box body; andthe gas outlet is provided with a waterproof explosion-proof ventilation device. According to the battery box provided by the invention, inflammable and combustion-supporting mixed gas can be exhausted in a guiding manner when the battery unit is in thermal runaway, so that flame is isolated from other battery units, the interlocking thermal runaway speed is reduced, and precious time is won forescape and fire fighting.

Description

technical field [0001] The invention relates to the fields of electric vehicle technology and battery energy storage technology, in particular to a battery box. Background technique [0002] With the wide application of lithium batteries and many battery fires causing major property losses and personal casualties, the safety of lithium batteries has become the focus of the whole society. Lithium batteries have large energy storage capacity, high temperature, collision, overcharging, short circuit Various conditions such as aging and aging may lead to thermal runaway of lithium batteries and then fire and explosion. Therefore, fire control measures need to be considered throughout the life cycle of lithium batteries. During the process of charging, discharging and placing lithium batteries, gases such as C2H4, C2H6, CH4, CO, H2 are generated, and the gas overflowing the battery cell is sealed in a box with an IP67 protection level and accumulates. After reaching the limit of ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems in the prior art that the flame directly contacts the battery body when the battery is thermally out of control, which may easily cause a chain reaction, the present invention provides a battery box. The battery box includes a box body and a plurality of battery units. The box body has an airtight mixing A gas containing cavity and a sealed battery containing cavity; the mixed gas containing cavity is located on one side of the battery containing cavity; the battery unit is arranged in the battery containing cavity, and the battery unit includes a safety valve; the mixed gas containing cavity has an air inlet and an exhaust hole; The air inlet is connected with the safety valve, and the air outlet is connected with the atmosphere outside the box; the air outlet is equipped with a waterproof and explosion-proof ventilation device

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