High Voltage Battery for Vehicles

Abstract

The present invention relates to a high-voltage battery for vehicles, comprising: an electrode joint divided into a first part placed close to a battery cell and a second part placed close to a terminal; a first part extension extended from the first part and fixed to a lower bag the second part extension, which extends from the second part, contacts the first part extension, has elasticity, and its upper end is fixed to the upper pocket; and the hook part, which extends from the first part extension, and is clamped by the first edge of the second part extension to hold the second part extension.

Description

technical field [0001] The present invention generally relates to a high voltage battery for a vehicle, which can realize safety of the pouched battery using a pouch current interrupt device (CID), thereby improving the marketability of the battery for the vehicle. Background technique [0002] In recent years, with the increasing application of pouched lithium-ion batteries, the energy density of batteries and the energy storage capacity of unit cells have gradually increased. In particular, in order to meet the demands brought about by the increase in the mileage of vehicles, research has been actively conducted in recent years to improve the energy storage capacity of lithium-ion batteries for vehicles. However, the problem with conventional pouched Li-ion batteries is that the sheath of the battery has low physical strength, and the battery does not have battery-level safety devices (current interrupt device (CID), positive temperature coefficient (PTC), fuses, etc. ), ...

AI Technical Summary

Problems solved by technology

However, the problem with conventional pouched Li-ion batteries is that the sheath of the battery has low physical strength, and the battery does not have battery-level safety devices (current interrupt device (CID), positive temperature coefficient (PTC), fuses, etc. ), making it difficult to achieve the safety required for batteries with high energy storage capacity

Specifically, when a vehicle battery is overcharged, gas is generated in the battery, and the temperature inside the battery rises, so thermal runaway may occur in materials inside the battery, causing a fire

In addition, during the operation of the vehicle, even if an abnormal battery reaction occurs in only one unit cell, an abnormal voltage can easily be generated in the battery pack, thereby reducing the driving safety of the vehicle

Images