JP6941789B2 - 電力供給装置、蓄電システム、及び充電方法 - Google Patents
電力供給装置、蓄電システム、及び充電方法 Download PDFInfo
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Description
蓄電池(E1)を充電する電力供給部(44)と、
前記蓄電池(E1)の充電期間の少なくとも一部をパルス状に充電するよう、前記電力供給部(44)を制御する制御部(45)と、を備え、
前記制御部(45)は、前記パルス状に充電する際の単位オン時間および単位オフ時間を、前記蓄電池(E1)の温度が低いほど、長くすることを特徴とする電力供給装置(40)。
前記単位オフ時間の最小値は、1秒であることを特徴とする項目1に記載の電力供給装置(40)。
前記単位オン時間t1に対する前記単位オフ時間t2の比率t2/t1は、0.05≦t2/t1≦1.0の範囲に設定されることを特徴とする項目1または2に記載の電力供給装置(40)。
前記制御部(45)は、定電流充電で充電を開始し、前記蓄電池(E1)の正極材料または負極材料が相転移を起こすと、前記パルス状の充電に切り替えることを特徴とする項目1から3のいずれかに記載の電力供給装置(40)。
蓄電池(E1)と、
項目1から4のいずれかに記載の電力供給装置(40)と、
を備えることを特徴とする蓄電システム(5)。
前記蓄電池(E1)の正極活物質は、Ni比率の高いリチウムニッケル複合酸化物であることを特徴とする項目5に記載の蓄電システム(5)。
前記蓄電池(E1)の負極活物質は、炭素材料、ケイ素、ケイ素酸化物などのケイ素化合物、ならびにスズ、アルミニウム、亜鉛、およびマグネシウムよりなる群から選択される少なくとも一種を含むリチウム合金であることを特徴とする項目5または6に記載の蓄電システム(5)。
蓄電池(E1)を充電する際に、充電期間の少なくとも一部をパルス状に充電する充電方法であって、
前記パルス状に充電する際のオン時間およびオフ時間を、前記蓄電池(E1)の温度が低いほど、長くすることを特徴とする充電方法。
E1 蓄電池
T1 温度センサ
S1 第1スイッチ
2 系統
S2 第2スイッチ
3 充電装置
4 充電ケーブル
5 蓄電システム
6 負荷
Rs シャント抵抗
7 太陽電池
8 DC−DCコンバータ
10 蓄電モジュール
11 電圧検出部
12 温度検出部
13 電流検出部
14 管理部
20 インバータ
30 モータ
40 充電部
41 入力フィルタ
42 全波整流回路
43 PFC回路
44 DC−DCコンバータ
45 制御部
46 インバータ
Claims (7)
- 蓄電池を充電する電力供給部と、
前記蓄電池の充電期間の少なくとも一部をパルス状に充電するよう、前記電力供給部を制御する制御部と、を備え、
前記制御部は、前記パルス状に充電する際の単位オン時間および単位オフ時間を、前記蓄電池の温度が低いほど、長くし、
前記制御部は、前記蓄電池を構成するセルのSOCを推定し、前記SOCをもとに前記セルの正極材料または負極材料の相転移が起きたタイミングを特定し、
前記制御部は、定電流充電で充電を開始し、前記セルの正極材料または負極材料の相転移が起きたと特定されたタイミングで、前記パルス状の充電に切り替えることを特徴とする電力供給装置。 - 前記単位オフ時間の最小値は、1秒であることを特徴とする請求項1に記載の電力供給装置。
- 前記単位オン時間t1に対する前記単位オフ時間t2の比率t2/t1は、0.05≦t2/t1≦1.0の範囲に設定されることを特徴とする請求項1または2に記載の電力供給装置。
- 蓄電池と、
請求項1から3のいずれかに記載の電力供給装置と、
を備えることを特徴とする蓄電システム。 - 前記蓄電池の正極活物質は、Ni比率の高いリチウムニッケル複合酸化物であることを特徴とする請求項4に記載の蓄電システム。
- 前記蓄電池の負極活物質は、炭素材料、ケイ素、ケイ素酸化物などのケイ素化合物、ならびにスズ、アルミニウム、亜鉛、およびマグネシウムよりなる群から選択される少なくとも一種を含むリチウム合金であることを特徴とする請求項4または5に記載の蓄電システム。
- 蓄電池を充電する際に、充電期間の少なくとも一部をパルス状に充電する充電方法であって、
前記パルス状に充電する際の単位オン時間および単位オフ時間を、前記蓄電池の温度が低いほど、長くし、
前記蓄電池を構成するセルのSOCを推定し、
前記SOCをもとに前記セルの正極材料または負極材料の相転移が起きたタイミングを特定し、
前記セルの正極材料または負極材料の相転移が起きたと特定されたタイミングで、定電流充電で開始した充電を、前記パルス状の充電に切り替えることを特徴とする充電方法。
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