Patent application number | Description | Published |
20080239628 | PROTECTION DEVICE FOR ASSEMBLED BATTERY, AND BATTERY PACK UNIT - A protection device for an assembled battery includes a sampling unit which individually samples voltages of batteries of the assembled battery to generate sampled voltages, a holding unit which holds the sampled voltages to generate a plurality of holding voltages, a multiplexer which sequentially reads the holding voltages and outputs each voltage to a common output node, a measuring unit configured to measure the individual voltages and the state of charges of the batteries based on a voltage of the node in a measuring period within a constant measuring cycle, and a control unit configured to turn on/off the sample switches at the same time within the measuring period and repeatedly turn on/off at least one sample switch selected from the plurality of sample switches in accordance with the state of charge in a term other than the measuring period. | 10-02-2008 |
20090167244 | PROTECTION DEVICE FOR ASSEMBLED BATTERY AND ASSEMBLED BATTERY SYSTEM CONTAINING THE SAME - A protection device for an assembled battery includes a sampling capacitor, first switches and second switches to sample the voltages of the battery cells and hold the voltages in the capacitor, a detection unit which detects the voltages of the battery cells based on the voltage sampled by any one of the first switches and the second switches and held on the capacitor and output the detected value, a computing unit which computes an average value of the detected values, a comparator which compares the detected value with the average value so as to obtain a result of comparison indicating a relation in size between the both, and a controller which controls the first switches and the second switches, for the second switches to sample if the detected value obtained by sampling by the first switches is higher than the average value according to the comparison result. | 07-02-2009 |
20090186257 | DIRECT METHANOL FUEL CELL SYSTEM, FUEL CARTRIDGE, AND MEMORY FOR FUEL CARTRIDGE - A fuel cartridge to be connected to a direct methanol fuel cell power generating device includes a spare fuel tank which stores a liquid fuel and is to be connected to the direct methanol fuel cell power generating device and a harmful substance trap member. The spare fuel tank stores a liquid fuel and is to be connected to the direct methanol fuel cell power generating device. The harmful substance trap member is fixed to the spare fuel tank and is to be connected to the direct methanol fuel cell power generating device. The harmful substance trap member contains a harmful substance trap material which traps gaseous harmful substances exhausted from the direct methanol fuel cell power generating device. | 07-23-2009 |
20100007351 | ASSEMBLED-BATTERY VOLTAGE MEASURING DEVICE AND ASSEMBLED-BATTERY VOLTAGE SYSTEM USING IT - A voltage measuring device includes a sample-and-hold circuit which alternates between (a) a sample mode in which a signal input from a cell to be measured is sampled so that a voltage across a first capacitor becomes equal to a voltage across the cell to be measured, and a voltage across a second capacitor having its one end connected to one end of the first capacitor becomes equal to zero volts and (b) a hold mode in which the connection between the first and second capacitors is opened, the first capacitor establishes a connection between an inverting input terminal and a non-inverting output terminal of an operational amplifier, and the second capacitor establishes a connection between a non-inverting input terminal and an inverting output terminal of the operational amplifier, and an analog-to-digital converter which converts a signal output from the operational amplifier into a digital signal. | 01-14-2010 |
20100072950 | ASSEMBLED BATTERY SYSTEM - In an assembled battery system, parallel battery blocks are connected in series. Each of the battery blocks includes battery unit modules connected in parallel, and each of the modules includes a battery unit and a fuse connected in series. The battery block is provided with a common connection line connected to a fuse monitoring module, and MOS-FETs each having a gate, source and drain, wherein the fuse is connected between the gate and source, and the drain is connected to the connection line. The FET is turned on and a voltage is applied to the connection line through the FET from the battery unit, when the fuse is blown out. Thus, the fuse monitoring module can detects the blowout of the fuse, and a control module can turn off a control switch to stop charging/discharging of the assembled battery in accordance with the control signal from the fuse monitoring module. | 03-25-2010 |
20100073003 | BATTERY INFORMATION ACQUIRING APPARATUS - A battery information acquiring apparatus includes a voltage acquiring unit which acquires an inter-terminal voltage of the battery cell; a battery information acquiring circuit which acquires battery information of the battery cell with the acquired voltage being supplied as a first power supply voltage and; a radio circuit which transmits a signal of the battery information to the management unit via the antenna with the acquired voltage being supplied as a second power supply voltage and; a rectification circuit which receives a radio signal from the management unit via the antenna, rectify the received radio signal and generate a DC voltage; and a control circuit which controls supply of the first and second power supply voltages to the battery information acquiring circuit and the radio circuit wherein the control circuit operates with the generated DC voltage being supplied as a third power supply voltage. | 03-25-2010 |
20100079146 | BATTERY INFORMATION ACQUIRING APPARATUS - There is an apparatus includes a voltage acquiring unit which acquires an inter-terminal voltage of the battery cell; a battery information acquiring circuit which acquires battery information of the battery cell with the acquired voltage being supplied as a power supply voltage and; a transformer configured to have a primary winding and a secondary winding, the primary winding being connected to a common wire; a communication circuit which transmits a signal of the battery information to a management unit, supplied with the acquired voltage as a power supply voltage; a rectification circuit which rectifies a signal of a predetermined frequency from the management unit to generate a DC voltage; and a control circuit which controls the supply of the power supply voltages to the battery information acquiring circuit and the communication circuit, the control circuit being supplied with the DC voltage as a power supply voltage. | 04-01-2010 |
20100124693 | SECONDARY BATTERY PACK - A secondary battery pack includes a plurality of cells each comprising a positive electrode terminal and a negative electrode terminal and arranged side by side, a battery management circuit board configured to monitor a voltage of the cells, and a plurality of bus-bars electrically connecting the electrode terminals of the adjacent cells. Each of the bus-bars includes first connecting portions connected to the electrode terminals and a second connecting portion connected directly to the battery management circuit board. | 05-20-2010 |
20110050169 | SECONDARY BATTERY DEVICE AND VEHICLE - According to one embodiment, the power supply management portion includes a timer configured to output an ON signal every time set by the control circuit, an OR circuit configured to receive supply of an output signal from the timer, an external signal supplied from outside, and a switch control signal output from the control circuit, and a switch circuit configured to switch output of the power source voltage from an external power source according to an output signal from the OR circuit, and the control circuit turns on a switch control signal after confirming which of the output signal from the timer or the external signal has turned on the switch circuit and turns off the switch control signal when both of the output signal from the timer and the signal supplied from outside are turned off. | 03-03-2011 |
20110075712 | COMMUNICATION CIRCUIT, ASSEMBLED BATTERY UNIT, AND VEHICLE - According to one embodiment, a communication circuit includes a direct-current converter circuit configured to generate a second power supply potential different from a second reference potential by a predetermined potential, from a first power supply potential, a first receiving circuit configured to receive a binary communication signal, whose one level is at a first reference potential, through a first signal input terminal, by a differential transmission method, a first level shift circuit configured to convert the communication signal received by the first receiving circuit into a binary communication signal, whose one level is at the second reference potential, and the other level is at the second power supply potential, and a first transmission circuit configured to output the binary communication signal converted by the first level shift circuit, through a first signal output terminal, by a differential transmission method. | 03-31-2011 |
20110076530 | BATTERY MANAGEMENT DEVICE, SECONDARY BATTERY DEVICE, AND VEHICLE - According to one embodiment, a device includes a power management module to which a power is supplied from an external power source, a power source supply circuit to which a power is supplied from the power management module via a first input terminal, a latch circuit configured to be operated by a power supplied from the power supply circuit or a power supplied via a second input terminal, a circuit configured to output a logic signal that sets a shutdown signal output from the latch circuit to a third input terminal, and a logic communication circuit to which a logic signal is supplied via the third input terminal and which supplies the logic signal to a forth terminal of the larch circuit. The shutdown signal output from the latch circuit is set to an predetermined level when the logic signal is set to a second level from a first level. | 03-31-2011 |
20120299482 | LIGHT EMITTING DEVICE, DISPLAY DEVICE, AND METHOD OF DRIVING ORGANIC ELECTROLUMINESCENT DEVICE - According to one embodiment, there is provided a light emitting device including an organic electroluminescent device that includes a first electrode, a light emitting layer arranged above the first electrode, and a second electrode arranged above the light emitting layer, a drive circuit that supplies a drive current between the first electrode and the second electrode to drive the organic electroluminescent device, and a drive stop circuit that stops the driving of the organic electroluminescent device when a value of the drive current falls below a predetermined value. | 11-29-2012 |