Battery pack and electric vehicle

Abstract

The invention provides a battery pack and an electric vehicle. The battery pack comprises at least one battery unit, the battery unit comprises at least one battery string, the battery string comprises one or at least two single batteries, the voltage difference between the two ends of the battery string is less than or equal to 60V, and when the battery string comprises at least two single batteries, the single batteries in the battery string are sequentially arranged along the first direction, and the first direction is parallel to the direction from the tail of the vehicle to the head of the vehicle, so that through the scheme, the voltage generated by the battery pack when the battery string is short-circuited can be relatively reduced, the probability that the battery pack catches fire and explodes is reduced, meanwhile, the arcing phenomenon can be reduced, and the safety of the battery pack is improved.

Description

Technical field [0001] The present invention relates to the technical field of vehicle manufacturing, and in particular to a battery pack and an electric vehicle. Background technique [0002] In electric vehicles, due to space limitations of electric vehicles, the battery pack is usually fixed at the bottom of the vehicle, that is, on the vehicle chassis. However, since the bottom of the vehicle is close to the ground, the battery pack installed at the bottom of the vehicle is extremely susceptible to impact while the vehicle is driving, causing the single cells in the battery pack to easily short-circuit, especially when the vehicle is driving. The impact to the bottom of the vehicle, which typically continues from the front to the rear, can cause a string of cells in the battery pack to short-circuit. [0003] As the power source of electric vehicles, battery packs have high energy density. High voltage and high energy density also mean high risk. When a string of single...

AI Technical Summary

Problems solved by technology

However, since the bottom of the vehicle is relatively close to the ground, the battery pack installed on the bottom of the vehicle is extremely vulnerable to impact during driving, which causes the single cells in the battery pack to be easily short-circuited, especially when the vehicle is running. The impact action on the bottom usually continues from the front to the rear of the car, which can cause a short circuit in a string of cells in the battery pack

[0003] As the power source of electric vehicles, the battery pack has a high energy density. High voltage and high energy density also mean high risk. When a string of single cells in the battery pack is short-circuited, if there is a High voltage will cause instantaneous high-voltage breakdown or high-voltage short circuit of the battery pack, making the battery pack easy to catch fire and explode, and also prone to arcing, posing a threat to the safety of drivers and passengers

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