Battery Pack and Method for Detecting Whether or Not Busbar is Opened Using the Battery Pack

Abstract

The invention discloses a battery pack and a method for detecting whether or not a busbar is opened using the battery pack. The battery pack comprises a plurality of modules including a unit battery which is connected in parallel to a balancing circuit, the module including a single unit battery or a plurality of unit batteries which are connected in series with each other; at least one busbar having one terminal connected to a cathode of one module and the other terminal connected to an anode of the other adjacent module to connect adjacent modules in series with each other; and a protectiveresistor connected in parallel to the busbar. According to the invention, the method detects whether the busbar between the unit batteries is opened or not because of damages, and prevents a reverse voltage generated by the damage of the busbar from damaging a management board.

Description

technical field [0001] The invention relates to a battery pack equipped with a bus bar connection state protection circuit for bus bar open circuit detection and reverse voltage prevention, and a bus bar open circuit detection method using the battery pack. Background technique [0002] In recent years, as the problem of environmental pollution has become serious, researches aimed at reducing the use of fossil fuels and using alternative power are being widely carried out in various fields. One of them is in the field of automobiles. Electric vehicles and hybrid vehicles that use both fossil fuels and electricity to reduce the use of fossil fuels are being developed and commercialized. [0003] In order to operate such an electric vehicle, a very high-capacity battery pack is required, and this battery pack includes unit cells and bus bars that electrically connect the unit cells to each other. Usually, the bus bar is formed in a bar shape made of a metal conductor, and is ...

AI Technical Summary

Problems solved by technology

[0008] For example, the technology in the existing literature only uses fuses to short-circuit the path of current flow, and in the existing literature, the unit cells are connected in parallel, but in this patent, the unit cells are connected in series when solving the problem, so the circuit structure itself is completely different

That is, it is difficult to solve the above-mentioned problem of reverse voltage generated by the current flowing in the balance circuit when the bus bar is open circuit and the problem of damage to the battery management board caused by it using the method as in the existing literature

Images