This paper reports the study results on R and D of the evaluation method for BOS component devices in fiscal 1994. (1) On the study on requirements of BOS component devices for practical use, the study results on storage battery, inverter, protective device for system interconnection, and effective use means for storage battery were summarized. On the future device technology, it was clarified that the following value added technologies are promising: simple design of inverter circuit, cost reduction by common specification and mass production, and stabilization of voltage and compensation of momentary peak load by combining inverter with small-capacity storage batteries. (2) On the study on the performance test method for BOS component devices, basic characteristic (capacity, efficiency) test, PSOC charge/discharge cycle test, and accelerated life cycle test were performed for 4 kinds of new storage batteries developed by NEDO. The whole characteristic test results satisfied specifications, and long-term cycle test is in promotion for all new storage batteries. 3 figs., 4 tabs.
Tatsuta, M 
- New Energy and Industrial Technology Development Organization, Tokyo (Japan)