| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage power supply which can provide a uniform distribution of generated heat as a whole. SOLUTION: A bus bar 51 has a cross-sectional area SI in its section I between a capacitor module terminal 33a and a terminal 34a, a cross-sectional area SII in its section II between the capacitor module terminal 34a and a terminal 34a, and a cross-sectional area SIII in its section III between the capacitor module terminal 35a and a terminal 36a. The sectional area of the bus bar is set so as to satisfy a relationship of SI<SII<SIII and so that the sectional area is increased and current densities of the sections I, II and III become equal to each other as it approaches to a power extract port 53. Thereby a distribution of heat generated along a longitudinal direction of the bus bar 51 can be made uniform, local temperature increases in groups of capacitors 27a and 28a can be prevented to avoid local temperature increase of the storage power supply 1 and to make uniform the temperature of the storage power supply 1. Similarly, a bus bar 52 is set to have such a cross-sectional area that is gradually increased as it approaches a power extract port 54. |
