Relay module for vehicle battery system

Abstract

Disclosed herein is a relay module for a vehicle battery system. The relay module includes a movable unit configured to be moved by a magnetic field generated by a coil and a return spring within a relay. This movable unit controls a state of an electrical connection between relay electrodes. A microsensor installed between the movable unit and a fixed unit maintains a fixed location relative to the movable unit and is configured to induce a variation in an electrical physical quantity depending on a variation in a location of the movable unit relative to the fixed unit.

Description

technical field [0001] The present invention relates generally to a relay module for a vehicle battery system, and more particularly to a technology related to a relay module constituting a part of a power relay assembly provided in a battery system installed in a vehicle for supplying electric power, The electric power is used to drive a vehicle (referred to herein as an eco-friendly vehicle) such as a hybrid vehicle or an electric vehicle. Background technique [0002] A battery system installed in an environment-friendly vehicle is configured as figure 1 , where the portion indicated by the dotted line represents the power relay assembly (PRA) 500 . Such a PRA500 is used to ensure a high degree of electrical insulation and electrical safety between various vehicle systems, and is also used to prevent secondary major accidents (such as electric shock caused by high voltage, or fire attributable to electrical failure) in the event of an accident occur. The PRA500 can als...

AI Technical Summary

Problems solved by technology

The disadvantage of this indirect diagnosis based on this logic is that when the vehicle is started, only faults such as relay welding, and open circuit failure of the initial charge relay 506 can be diagnosed such that when the When a problem occurs, it is difficult to determine whether the problem is caused by the relay itself, or by an error in the internal control circuit of the BMS, or by an open circuit or short circuit of the control output line

Furthermore, even if the problem is determined to be caused by the relay itself, it is impossible to precisely determine whether the problem is caused by welding of the contacts of the relay, or whether the problem is caused by an open circuit failure, or where the problem occurs (i.e., the main relay 502, negative main relay 504, and initial charging relay 506)

[0005] Therefore, there is a problem that when a failure occurs in a relay that is a part of the power relay assembly 500, the problem cannot be diagnosed immediately and accurately.

Furthermore, when only a specific relay is replaced based on a determination of a relay-related failure, there is a possibility that the relay that actually failed has not actually been replaced, resulting in exposing the vehicle to an unexpected dangerous situation

In addition, when the vehicle is inspected, since the relay and the BMS must be replaced individually and then inspected for fault detection, the work efficiency of fault repair is greatly reduced, resulting in time and economic loss

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