Battery pack including battery gauge

摘要

A battery pack including a battery gauge. The battery gauge includes a circuit board, light emitting devices electrically connected to a battery cell on the circuit board and turned on or off according to a voltage of the battery cell, a display unit disposed outside a pack case at positions corresponding to the light emitting devices, and a partition wall guiding light of the light emitting device to a part of the display unit corresponding to the light emitting device. Since the partition wall prevents light of the light emitting device from affecting the neighboring light emitting device, an on/off operation of the light emitting device is accurately displayed on the display unit, so that a battery discharge level can be accurately detected.

主权项

1. A battery pack, comprising:
at least one rechargeable battery cell; a protective circuit module electrically connected to the battery cell; a pack case accommodating the battery cell and the protective circuit module; and a battery gauge, the battery gauge comprises: a circuit board; a plate on the circuit board having an approximate + shape; a plurality of light emitting devices electrically connected to the battery cell on the circuit board and turned on or off according to a voltage of the battery cell; a display unit disposed outside the pack case at positions corresponding to the light emitting devices; and a plurality of partition wall guiding lights extending at 90 degrees from the plate, each of the plurality of partition wall guiding lights has three walls with a center wall attached to two outer walls at angles of greater than 90 degrees and less than 180 degrees, wherein the three walls of each of the plurality of partition wall guiding lights partially surrounds one of the plurality of light emitting devices, wherein the outer walls of adjacent partition wall guiding lights do not connect with any other structure except the plate and the center wall and form an open portion corresponding to a region without light emitting devices where extensions of the approximate + shaped plate exist.