LITHIUM ION SECONDARY BATTERY SYSTEM AND LITHIUM SECONDARY BATTERY SYSTEM OPERATION METHOD

摘要

A lithium ion secondary battery system allowing a high power efficiency and large effective capacity is provided. The system includes an external power source for charging a lithium ion secondary battery, and a controller for switching output modes including a continuous discharge mode, in which electric power is continuously supplied from the lithium ion secondary battery to the load, and a pulsed charge and discharge mode, in which pulsed electric power is supplied from the lithium ion secondary battery to the load, and pulsed electric power is supplied from the external power source to charge the lithium ion secondary battery during a low-level pulsed discharge period(s), which are periods during which electric power is not supplied to the load, wherein the controller switches the output modes to the pulsed charge and discharge mode when the lithium ion secondary battery has a voltage lower than a predetermined upper switching voltage.

主权项

1. A lithium ion secondary battery system configured to supply electric power from a lithium ion secondary battery to a load, the system comprising:
an external power source that charges the lithium ion secondary battery; and a controller that switches output modes including a continuous discharge mode, in which electric power is continuously supplied from the lithium ion secondary battery to the load, and a pulsed charge and discharge mode, in which pulsed electric power is supplied from the lithium ion secondary battery to the load, and pulsed electric power is supplied from the external power source to charge the lithium ion secondary battery during at least one of low-level pulsed discharge periods, which are periods during which electric power is not supplied to the load, wherein the controller switches the output modes to the pulsed charge and discharge mode when the lithium ion secondary battery has a voltage lower than a predetermined upper switching voltage.