Abstract: To provide a secondary battery pack system that controls battery packs which are connected in parallel without requiring a complex system configuration, a secondary battery pack system of the present invention that supplies power to an electronic device includes a plurality of battery packs each having a controller, a main body side connection circuit which is provided on the electronic device side so as to be connected to the plurality of battery packs, and a main body side discharge control signal line which is provided in the main body side connection circuit. The main body side discharge control signal line and controllers of the plurality of battery packs are connected to each other.

Abstract: To provide a secondary battery pack system that controls battery packs which are connected in parallel without requiring a complex system configuration, a secondary battery pack system of the present invention that supplies power to an electronic device includes a plurality of battery packs each having a controller, a main body side connection circuit which is provided on the electronic device side so as to be connected to the plurality of battery packs, and a main body side discharge control signal line which is provided in the main body side connection circuit. The main body side discharge control signal line and controllers of the plurality of battery packs are connected to each other.

Abstract: To provide a secondary battery pack system that controls battery packs which are connected in parallel without requiring a complex system configuration, a secondary battery pack system of the present invention that supplies power to an electronic device includes a plurality of battery packs each having a controller, a main body side connection circuit which is provided on the electronic device side so as to be connected to the plurality of battery packs, and a main body side discharge control signal line which is provided in the main body side connection circuit. The main body side discharge control signal line and controllers of the plurality of battery packs are connected to each other.

Abstract: Provided is a multiple series/multiple parallel battery pack which is capable of operating at a proper timing, and which, even if lead wires for voltage measurement extending from secondary batteries are short-circuited, gives no damage to the secondary batteries or lead wires. Thus, the multiple series/multiple parallel battery pack according to the present invention comprises a plurality of units which are connected in series and a control circuit for performing control by means of a charge stop signal and a discharge stop signal output from each of the units.

Abstract: Provided is a secondary battery pack that determines, as for protection and controlling, the state of connection based on information input from external interfaces and switches a protection and control mode from one setting to another according to connection targets and situations. Accordingly, the secondary battery pack of the present invention includes a secondary battery block 12 having secondary batteries 11 connected; a current detection section 13 that monitors a charge and discharge current of the secondary battery block 12; an output voltage detection section 15 that monitors the output voltage; a communication terminal 17; an ID terminal 18 that detects a connection to a device; and a control section 19.

Abstract: In a viewpoint of the invention, a fuel cell system includes a fuel cell configured to generate a electric power by using fuel; a first assisting power source; a protecting circuit connected to the first assisting power source and configured to detect a failure in the first assisting power source; an auxiliary unit configured to supply the fuel to the fuel cell; a control circuit configured to control the fuel cell and the auxiliary unit; a first power converter configured to drive the control circuit by using electric power from the first assisting power source; and a first synthesizing section configured to synthesize a first electric power from the fuel cell and a second electric power from the first assisting power source to supply a synthesized power to a load.

Abstract: The invention provides a battery pack 2 operatively associated with a main system 1 for charge-level data sharing between them for recording and management. The battery pack 2 includes recorder means 22 that is connected to the main system 1 for writing to and reading out of the main system 1. Charge-level data measured (12, 14) and calculated (13) at at least the main system 1 are written to and read out of the recorder means 22 by way of signal lines. The battery pack 2 is not provided with any means for management of the charge-level data, making cost and size reductions possible.

Abstract: A battery pack containing a CPU and allowing correction of measured data is provided. The CPU has, at least, a main program for obtaining data concerning the voltage of each cell, charge/discharge current and temperature by measurement to control charging and discharging and to perform cumulative calculation of the remaining battery capacity, a communication program for communicating with an external device, and a correction program for acquiring measured data to obtain a correction factor for calculating a predetermined value from each item of the measured data and for storing the correction factor in a memory. After the state of each cell has been set to a predetermined value, the correction program is started to obtain a correction factor and to store it in the memory.

Abstract: A battery pack containing a CPU and allowing correction of measured data is provided. The CPU has, at least, a main program for obtaining data concerning the voltage of each cell, charge/discharge current and temperature by measurement to control charging and discharging and to perform cumulative calculation of the remaining battery capacity, a communication program for communicating with an external device, and a correction program for acquiring measured data to obtain a correction factor for calculating a predetermined value from each item of the measured data and for storing the correction factor in a memory. After the state of each cell has been set to a predetermined value, the correction program is started to obtain a correction factor and to store it in the memory.