Battery acid status indicator and method for production thereof

摘要

An acid status indicator for a battery, in particular for a lead-acid rechargeable battery, having a sight glass and a holder for holding the sight glass and for attaching the acid status indicator to a housing of the battery, wherein the sight glass and the holder are produced by two-component injection molding, with the holder being produced by insert molding of the sight glass.

主权项

1. An acid status indicator for a lead-acid rechargeable battery, having:
(a) a sight glass (14) having a bead provided about the circumference of the sight glass and a head (22), wherein the bead is disposed in a middle section of the head, spaced apart from an upper end of the head; and (b) a holder (12) for holding the sight glass (14) and for attaching the acid status indicator (16) to a housing (10) of the battery (11), the holder having an engaging projection which is received by the bead, wherein the bead is surrounded by the holder (12) in an interlocking manner, thereby preventing any movement in the axial direction of the sight glass (14) relative to the holder (12), the holder and the sight glass being connected to one another by a gas-tight shrink fit, wherein the sight glass (14) comprises a first plastic and the holder (12) comprises a second plastic, with the first plastic shrinking less than the second plastic when it cools down.