報告書番号

T92093

タイトル（和文）

リチウム電池ロードコンディショナーの設計・試作－２ｋＷｈ級組電池運転のための検討－

タイトル（英文）

FABRICATION OF A LITHIUM BATTERY LOAD CONDITIONER: PRELIMINARY STUDY ON 2KWH-CLASS BATTERY OPERATION.

概要 （図表や脚注は「報告書全文」に掲載しております）

組電池用の設計変更をした２５Ｗｈ級リチウム／酸化バナジウム単電池について、電池を直列接続した組電池運転時に想定される３条件下での電池挙動と、総電圧約２００Ｖとなる数の電池を試作し、実際の各電池の容量を測定した結果を報告する。おもな結果は以下のとおり。（１）組電池運転条件を想定した小容量セルによる基礎検討。１。組電池温度は少なくとも１０－４０度で運転可能であること。２。過放電領域は急速な電圧低下があるものの、過充電領域には耐性があること。３。単セル容量に差があると、直列接続運転時には最小容量のセルに過負荷がかかるため、全体として過充電傾向で運転する方が望ましいこと。（２）２ｋＷｈ級電池の設計・試作を行った。組電池特性を把握するため、各セル電圧・温度・熱移動・応力を測定する機能を付加した。また、ＬＣ運転組電池用に試作した総容量２ｋＷｈ級セルの個々の初期容量は公称１０Ａｈに対し平均１０．

概要 （英文）

FABRICATION OF A LITHIUM BATTERY LOAD CONDITIONER: PRELIMINARY STUDY ON 2KWH-CLASS LITHIUM/VANADIUM OXIDE BATTERY PRELIMINARY STUDY WAS CARRIED OUT ON CHARACTERICTICS OF LITHIUM/VANADIUMOXIDE CELLS, WHICH WERE DEVELOPED THROUGH CRIEPI-YUASA JOINT RESEARCH,FOR LOAD CONDITIONER USE. PREVIOUSLY ASSEMBLED 25WH-CLASS PRISMATIC CELLS SHOWED GOOD CHARACTERISTICS, INCLUDING POWER DENSITY, SHELF-STORED CAPACITY,AND EFFICIENCIES EXCEPT BUT CYCLE LIFE. FOR PRACTICAL POWER APPLICATION,MULTI-CELLS MUST BE CONNECTED IN SERIES. THE 25WH-CLASS CELL WAS RE-DESIGNED FOR A BATTERY SYSTEM. THIS REPORT DESCRIBES PRELIMINARYRESULTS ON THE MULTI-CELL THECHNOLOGY. MAIN RESULTS ARE AS FOLLOWS; 1)THE CELL MAINTAINS THEIR OWN CAPACITY DURING CYCLING TEST ON OVER-CHARGE VOLTAGE REGION, BUT SHOWS POOR CYCLEABILITY ON UNDER-VOLTAGE REGION. THE CELL CAPACITY DEPENDS ON OPERATION TEMPERATURE, EVEN BETWEEN 10 DEGREE AND 40 DEGREE. 2)WE ASSEMBLED 80 CELLS IN TOTAL. THE MEAN DISCHARGED CAPACITY WAS CALCULATED TO BE 10. 4AH BASED ON INITIAL CYCLING TESTS.3)A POWER CONVERTION DEVICE FOR ADVANCED BATTERY SYSTEM WAS DESIGNED FOR THE 2KWH-CLASS BATTERY. THE BATTERY UNIT IS CONSISTED OF 8 MODULE UHITS. EACH MODULE UNIT HAS 10 CELLS. PRACTICALLY ASSEMBLED BATTERY S ENERGY DENSITY WAS REDUCED BY AUXILIARY DEVICES, INCLUDING HEAT DISSIPATING FINS.

報告者

キーワード