Multi-series battery control system

A battery system, comprising:

• a unit battery cell assembly including a plurality of unit battery cells that are electrically connected in series and each include a plurality of battery cells that are electrically connected in series;
• a plurality of battery-cell-control integrated circuits that are provided to respectively correspond to the plurality of unit battery cells, each detect terminal voltages of a plurality of battery cells of a corresponding unit battery cell, and each adjust a state of charge of each of the plurality of battery cells;
• and
• a plurality of battery-cell-monitor integrated circuits that are respectively paired with the plurality of battery-cell-control integrated circuits, and each are connected with a plurality of battery cells that are connected with a corresponding paired battery-cell-control integrated circuit to be used to monitor the plurality of battery cells connected with the corresponding paired battery-cell-control integrated circuit, wherein:
• each of the plurality of battery-cell-control integrated circuits includes
• a plurality of voltage terminals that are provided to be used to electrically connect with terminals of the plurality of battery cells of the corresponding unit battery cell,
• a voltage detection unit that detects terminal-to-terminal voltages of the plurality of battery cells of the corresponding unit battery cell that are taken in via the plurality of voltage terminals,
• a plurality of state-of-charge-adjust terminals that are provided to be used to adjust a state of charge of each of the plurality of battery cells of the corresponding unit battery cell,
• a plurality of switches that are respectively and electrically connected with the plurality of state-of-charge-adjust terminals, and each form a discharge circuit that adjusts a state of charge of each of the plurality of battery cells of the corresponding unit battery cell,
• a driving unit that drives each of the plurality of switches,
• a communication unit that inputs/outputs a signal,
• a signal input terminal that is provided to be used to input a signal to the communication unit,
• a signal output terminal that is provided to be used to output a signal from the communication unit,
• a temperature detection unit that detects a temperature of an integrated circuit, and
• a temperature abnormality detection unit that detects whether or not the temperature detected by the temperature detection unit exceeds a preset temperature;
• each of the plurality of battery-cell-monitor integrated circuits includes
• a signal input terminal to input a signal, and
• a signal output terminal to output a signal;
• a first signal transmission line via which a signal is transmitted in series through the plurality of battery-cell-control integrated circuits is provided among the plurality of battery-cell-control integrated circuits so that a signal is outputted from a signal output terminal of a 1st battery-cell-control integrated circuit based upon a signal inputted at a signal input terminal of the 1st battery-cell-control integrated circuit to be inputted at a signal input terminal of a 2nd battery-cell-control integrated circuit;
• a second signal transmission line via which a signal is transmitted in series through the plurality of battery-cell-monitor integrated circuits is provided among the plurality of battery-cell-monitor integrated circuits so that a signal is outputted from a signal output terminal of a 1st battery-cell-monitor integrated circuit based upon a signal inputted at a signal input terminal of the 1st battery-cell-monitor integrated circuit to be inputted at a signal input terminal of a 2nd battery-cell-monitor integrated circuit;
• and
• the temperature abnormality detection unit stops driving of the plurality of switches when the temperature abnormality detection unit detects that the detected temperature exceeds the preset temperature.

A battery-cell-control integrated circuit that is used to detect a terminal voltage of each of a plurality of battery cells electrically connected in series and to adjust a state of charge of each of the plurality of battery cells, comprising:

• a plurality of voltage terminals that are provided to be used to electrically connect with terminals of the plurality of battery cells;
• a voltage detection unit that detects terminal-to-terminal voltages of the plurality of battery cells that are taken in from the plurality of voltage terminals;
• a plurality of state-of-charge-adjust terminals that are provided to be used to adjust a state of charge of each of the plurality of battery cells;
• a plurality of switches that are respectively and electrically connected with the plurality of state-of-charge-adjust terminals, and each form a discharge circuit that adjusts a state of charge of each of the plurality of battery cells;
• a driving unit that drives each of the plurality of switches;
• a communication unit that inputs/outputs a signal;
• a signal input terminal that is provided to be used to input a signal to the communication unit;
• a signal output terminal that is provided to be used to output a signal from the communication unit;
• a temperature detection unit that detects a temperature of an integrated circuit;
• and
• a temperature abnormality detection unit that detects whether or not the temperature detected by the temperature detection unit exceeds a preset temperature, wherein:
• the temperature abnormality detection unit stops driving of the plurality of switches when the temperature abnormality detection unit detects that the detected temperature exceeds the preset temperature.

A battery-cell-control integrated circuit that is provided to correspond to a plurality of battery cells electrically connected in series, is paired with a first integrated circuit that is connected with terminals of the plurality of battery cells, is electrically connected with the plurality of battery cells connected with the paired first integrated circuit, and is used to detect a terminal voltage of each of the plurality of battery cells connected with the paired first integrated circuit and to adjust a state of charge of each of the plurality of battery cells connected with the paired first integrated circuit, comprising:

• a plurality of voltage terminals that are provided to be used to electrically connect with terminals of the plurality of battery cells connected with the paired first integrated circuit;
• a voltage detection unit that detects terminal-to-terminal voltages of the plurality of battery cells connected with the paired first integrated circuit that are taken in via the plurality of voltage terminals;
• a plurality of state-of-charge-adjust terminals that are provided to be used to adjust a state of charge of each of the plurality of battery cells connected with the paired first integrated circuit;
• a plurality of switches that are respectively and electrically connected with the plurality of state-of-charge-adjust terminals, and each form a discharge circuit that adjusts a state of charge of each of the plurality of battery cells connected with the paired first integrated circuit;
• a driving unit that drives each of the plurality of switches;
• a communication unit that inputs/outputs a signal;
• a signal input terminal that is provided to be used to input a signal to the communication unit;
• a signal output terminal that is provided to be used to output a signal from the communication unit;
• a temperature detection unit that detects a temperature of an integrated circuit;
• and
• a temperature abnormality detection unit that detects whether or not the temperature detected by the temperature detection unit exceeds a preset temperature, wherein:
• the temperature abnormality detection unit stops driving of the plurality of switches when the temperature abnormality detection unit detects that the detected temperature exceeds the preset temperature.