Cell controller, battery module and power supply system

A cell controller for controlling a serially connected body of lithium cells constituted by connecting a plurality of groups in series, each of said groups being constituted of a plurality of lithium cells connected in series, wherein:

• a plurality of ICs are fixed on a control substrate for each of said groups;
• said plurality of ICs each have a voltage detecting unit for detecting voltages of respective lithium cells constituting said groups, a plurality of switch elements connected in parallel to said respective lithium cells via resistors, a switch control unit for controlling conduction and a blocking operation of said plurality of switch elements, an information input terminals for inputting control information, an information output terminal for outputting control information, a power supply terminal, and a reference potential terminal;
• said plurality of ICs operate based on power supplied from said corresponding group to said power supply terminal and said reference potential terminal of a corresponding IC;
• said plurality of ICs detect voltages of respective cells of a corresponding group by said voltage detecting unit and control said plurality of switch elements connected in parallel to said respective cells via resistors by said switch control unit to adjust states of charges of said cells;
• a wiring is provided on said control substrate, said wiring electrically connecting, among said groups connected in series, said information output terminal of one IC corresponding to one of adjacent groups and said information input terminal of the other IC corresponding to the other one of said adjacent groups;
• power supply terminals of said one and the other ICs are connected respectively to a positive electrode of a higher-order cell constituting said corresponding group via a first inductor;
• the reference potential terminal of said one IC is connected via said first inductor to, together with said power supply terminal of said the other IC, a positive electrode of a higher-order cell constituting a group to which said the other IC corresponds;
• and
• said first inductors are provided on said control substrate respectively.

A cell controller, comprising:

• a control substrate;
• connectors provided on said control substrate for electrically connecting to respective terminals of a serially connected body of lithium cells constituted by connecting a plurality of groups in series, each of said groups being constituted of a plurality of lithium cells connected in series;
• a plurality of ICs provided on said control substrate for each of to said groups, said plurality of ICs each having a voltage detecting unit for detecting voltages of respective lithium cells constituting said groups, a plurality of switch elements connected in parallel to said respective lithium cells via resistors, a switch control unit for controlling conduction and a blocking operation of said plurality of switch elements, an information input terminals for inputting control information, an information output terminal for outputting control information, a power supply terminal, and a reference potential terminal, said plurality of ICs operating based on power supplied from said corresponding group to said power supply terminal and said reference potential terminal of a corresponding IC, and said plurality of ICs detecting voltages of respective cells of a corresponding group by said voltage detecting unit and controlling said plurality of switch elements connected in parallel to said respective cells via resistors by said switch control unit to adjust states of charges of said cells;
• a first wiring provided on said control substrate, said first wiring electrically connecting, among said groups connected in series, said information output terminal of one IC corresponding to one of adjacent groups and said information input terminal of the other IC corresponding to the other one of said adjacent groups;
• a plurality of first inductors provided on said control substrate and connected electrically between respective power supply terminals of said one and the other ICs and positive electrodes of higher-order cells to which said one and the other ICs correspond respectively;
• a second wiring provided on said control substrate for a reference potential terminal of said one IC to be connected via said first inductor to, together with said power supply terminal of said the other IC, a positive electrode of a higher-order cell to which said the other IC corresponds;
• and
• a first capacitor provided on said control substrate to be connected to said respective lithium cells in parallel respectively.