Power source battery storing structure in motor-assisted bicycle

摘要

To provide a compact power source battery storing structure in a motor-assisted bicycle using motive power of a motor to be driven by cylindrical batteries, for assisting man power propelling the bicycle. Ten Ni-Cd batteries 28a are arranged in a row in a direction perpendicular to a center line of each Ni-Cd battery 28a in such a condition that the positive electrodes and the negative electrodes of the adjacent Ni-Cd batteries 28a are alternately pointed and the cylindrical surfaces of the adjacent Ni-Cd batteries 28a are in contact with each other. On the row of the Ni-Cd batteries 28a, the other ten Ni-Cd batteries 28b are stacked in such a manner that each Ni-Cd battery 28b is partially received in an upper recess defined between the adjacent Ni-Cd batteries 28a. In this stacked condition, the positive electrodes and the negative electrodes of the adjacent Ni-Cd batteries 28a forming the lower row are electrically and mechanically connected together by soldering through a plurality of connecting members 30a. Similarly, the positive electrodes and the negative electrodes of the adjacent Ni-Cd batteries 28b forming the upper row are connected together through a plurality of connecting members 30b. In particular, the positive electrode of the frontmost Ni-Cd battery 28a (the leftmost one as viewed in Fig. 2) of the lower row and the negative electrode of the frontmost Ni-Cd battery 28b (the leftmost one as viewed in Fig. 2) of the upper row are connected together through a connecting member 30c. Such an assembly of the Ni-Cd batteries 28a and 28b is inserted into a hollow cylindrical heat-shrinkable synthetic resin film 31, and heat is applied to the film 31 to thereby thermally shrink the film 31. IMAGE