Lithium battery with fire-proof and explosion-proof device and electric vehicle using the battery

Abstract

The invention discloses a lithium battery having a fire-proof and explosion-proof device. The lithium battery includes a cell set, a cell protective sheath and an external shell. The cell set is arranged in the cell protective sheath and the cell protective sheath is disposed in the external shell. A clearance between the cell protective sheath and the external shell is filled with bicarbonate powder which can be subject to an endothermic reaction and generates carbon dioxide. Silicon dioxide is arranged between an internal surface of the external shell and the bicarbonate powder. The external shell is provided with a discharging hole. In the device, during a use process of the lithium battery, the bicarbonate powder, which can be subject to an endothermic reaction when being heated and generates carbon dioxide, is used as a working medium for performing heat absorption and oxygen insulation to the battery. In addition, an internal pressure of the battery can be regulated timely. By the comprehensive protective method above, accidents, such as ignition, explosion and the like, can be effectively prevented so that safe risk of the lithium battery can be greatly reduced.

Description

technical field [0001] The invention relates to a lithium-ion battery with a fire-proof and explosion-proof device and its application products, more specifically, it relates to a lithium-ion battery with a fire-proof and explosion-proof device and an electric vehicle using the battery. Background technique [0002] Due to the non-renewable energy crisis and serious environmental pollution, the world has accelerated the development of green and high-performance lithium-ion batteries. The application field of lithium-ion batteries extends from the field of digital products to the fields of transportation power, energy storage, aerospace, and communication backup power. People The demand for lithium-ion batteries has also grown from hundreds of mAh to hundreds or even thousands of amp-hours. With the increase in capacity, safety issues will become more difficult to control. Therefore, the safety of high-capacity lithium-ion batteries is now The subject of research by many comp...

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Problems solved by technology

[0003] Lithium-ion batteries are very easy to cause fire and explosion due to problems such as short circuit and poor heat dissipation. However, the existing fire-proof and explosion-proof measures for lithium-ion batteries can only improve some of the problems to a limited extent but cannot fully solve the problem. In order to overcome this defect, the present invention provides a A lithium-ion battery fire-proof and explosion-proof device with enhanced fire-proof and explosion-proof functions aimed at the causes of lithium-ion battery fire and explosion

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