Electric automobile, power battery and collision warning method of power battery

Abstract

The invention relates to an electric automobile, a power battery and a collision warning method of the power battery. The power battery comprises a protective shell, a battery body and a pressure detection assembly, wherein the protective shell comprises a hollow mounting shell and a cover plate covering the mounting shell, anaccommodating cavity is defined by the cover plate and the hollow mounting shell, and the mounting shell is provided with a flow channel allowing fluid to flow; the battery body is mounted in the accommodating cavity; and the pressure detection assembly is used for detecting the pressure of the flow channel so as to judge whether the protective shell is damaged or not and sending out an alarm prompt. Whether the power battery is damaged or not is judged by detecting the pressure change condition of the flow channel through the pressure detection assembly, reliable detection of the sealing condition of the power battery is achieved, damage of the power battery is found in real time so as to avoid more accidents, the safety of the power battery after collision is guaranteed, and potential safety hazards are avoided.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to an electric vehicle, a power battery and a collision warning method thereof. Background technique [0002] Electric vehicles use electric energy as the driving energy, and the placement of power batteries is mainly based on the chassis. For electric vehicles with power batteries in the chassis, accidents such as collisions or bottoming are very likely to cause damage to the battery pack. The design of battery packs for electric vehicles is designed to meet the seawater immersion requirements of Item 7.9 of GB / T31467.3-2015 Safety Requirements and Test Methods for Lithium-ion Traction Battery Packs and Systems for Electric Vehicles Part III. The battery packs are usually sealed Design, the sealing design method usually adds a layer of waterproof glue between the battery lower case and the upper cover. [0003] However, after the battery pack is collided or underpinne...

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Problems solved by technology

[0004] Based on this, it is necessary to provide an electric vehicle, a power battery and a collision warning method that can detect whether the power battery is damaged in view of the problem that the sealing condition of the power battery cannot be judged when the front electric vehicle collides.

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