BATTERY CONTROLLER, BATTERY SYSTEM

摘要

A battery controller that performs current limitation in consideration of limitation on other components than a battery main body and the state of health of a battery is provided. A battery controller limits a battery current using allowable average current information describing current average values respectively allowed for a plurality of time windows. When the battery is deteriorated, an allowable average current obtained by subtraction in response to the state of health is used. Further, when the battery current exceeds an upper limit value stored in advance, the battery current is controlled with the upper limit reduced by the excessive amount.

主权项

1. A battery controller comprising:
a control part that controls an assembly battery in which a plurality of battery cells are connected; a current measurement part that measures currents flowing in the battery cell cells or the assembly battery; a state of health acquisition part that acquires a state of health of the assembly battery; and a memory that stores allowable average current characteristic information representing upper limits of average values of absolute values of the currents in a plurality of different time windows and upper limit values of the currents, wherein the control part controls the currents so that the average value of the absolute values of the currents obtained with respect to each time window fall within the upper limit of the average value with respect to each time window represented in the allowable average current characteristic information, if the state of health acquisition part senses deterioration of the assembly battery, the control part controls the currents so that, in at least one of the time windows, the average value of the absolute values of the currents in the time window width may fall within a value obtained by subtraction of the upper limit in response to the state of health of the assembly battery, and if the current exceeds the upper limit stored in the memory, the control part changes the upper limit value stored in the memory to be smaller by the excessive amount and controls the current according to the changed upper limit value.