POWER SYSTEM
To reduce the amount of decrease of charge power or discharge power of a battery pack even when the internal resistance of a single battery increases.SOLUTION: A battery module 10 comprises single batteries 11, each of which is connected in series. A battery pack 100 comprises two battery modules 10...
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| Sprache: | eng ; jpn |
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| Zusammenfassung: | To reduce the amount of decrease of charge power or discharge power of a battery pack even when the internal resistance of a single battery increases.SOLUTION: A battery module 10 comprises single batteries 11, each of which is connected in series. A battery pack 100 comprises two battery modules 10a and 10b. A connection configuration of the battery modules 10 can be switched between series connection and parallel connection by turning a first relay R1 to a third relay R3 ON/OFF. An ECU 200 switches the connection configuration from series connection to parallel connection, when the internal resistance of one of the single batteries 11 increases, and the charge power or discharge power when switching the connection configuration to parallel connection is greater than the decreased charge power or discharge power with the increase of the internal resistance.SELECTED DRAWING: Figure 1
【課題】単電池の内部抵抗が増加しても、電池パックの充電電力、あるいは、放電電力の低下量を、小さくする。【解決手段】電池モジュール１０は、直列に接続された単電池１１から構成される。バッテリパック１００は、二つの電池モジュール１０ａ、１０ｂを備え、第１リレーＲ１～第３リレーＲ３をＯＮ／ＯＦＦすることにより、電池モジュール１０の接続形態を、直列接続または並列接続に切換可能とされている。ＥＣＵ２００は、いずれかの単電池１１の内部抵抗が増加し、内部抵抗の増加によって低下した充電電力または放電電力より、接続形態を並列接続に切り換えた際の充電電力または放電電力の方が大きくなる場合に、接続形態を直列接続から並列接続に切り換える。【選択図】図１ |
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