Water-tight battery system

Abstract

An output terminal 7 has a circular cylindrical section 70A and a non-circular cylindrical section 70B, the front end is exposed outside the surface of the external case 2, and the aft end is attached to an output terminal lead-plate 8 inside the external case 2. The external case 2 has circular cylindrical through-holes 26A to pass the circular cylindrical sections 70A, and non-circular cylindrical through-holes 26B to insert the non-circular cylindrical sections 70B in a manner that does not rotate. Each metal rod 70 has an O-ring 72 disposed in a gasket groove 71, the O-ring 72 seals the gap between the output terminal 7 circular cylindrical section 70A and the circular cylindrical through-hole 26A in a water-tight configuration. The non-circular cylindrical section 70B inserts into the non-circular cylindrical through-hole 26B to attach the output terminal 7 to the external case 2 in a manner that does not rotate.

Description

technical field [0001] The present invention relates to a battery system in which positive and negative output terminals are fixed in a waterproof structure in an exterior case containing a plurality of batteries, and particularly relates to a battery system most suitable for electric vehicles such as electric bicycles. Background technique [0002] Since the battery system used in vehicles such as electric bicycles is used outdoors, forming a waterproof structure can improve reliability. In the battery system, in order to connect the output side of the battery to the electric vehicle, it is necessary to output lead wires from the exterior case. It is known that a waterproof structure in which lead wires are output from an exterior case has been developed. Refer to Japanese Unexamined Patent Publication No. 2008-212106. [0003] As described in the aforementioned Japanese Patent Laid-Open No. 2008-212106, in order to lead the lead wires out of the outer case through a wate...

AI Technical Summary

Problems solved by technology

Therefore, it takes time to connect the output terminal to the inside of the case. In addition, when the output terminal is connected to the inside of the case, the connector is fixed at the correct position. At this time, it is necessary to securely clamp the O-ring forms a waterproof structure, so there is a disadvantage of time-consuming assembly

In addition, for the battery system mounted on an electric vehicle, the fixing screw (stop ね じ) is easily loosened due to the vibration caused by the running of the vehicle. When the fixing screw is loose, the O-ring cannot be reliably clamped, and the waterproof structure cannot be maintained. shortcoming

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