| Patent application number | Description | Published |
|---|
| 20100060256 | VOLTAGE DETECTION APPARATUS - A voltage detection apparatus includes: a battery including a plurality of unit cells mutually connected in series; a plurality of blocks, each block including at least one of the plurality of unit cells; a plurality of voltage detectors, each detector connected to respective one of the blocks, and detecting a voltage between both ends of the unit cell in the one of the blocks; a plurality of reference power sources, each source connected to respective one of the voltage detectors, and at least one of the reference power sources having higher accuracy than the other reference power sources; and a correcting unit which corrects a detection result of the voltage detector which is connected to the other reference power source on the basis of a detection result of the voltage detector which is connected to the reference power source with the higher accuracy. | 03-11-2010 |
| 20100060295 | VOLTAGE DETECTION APPARATUS - A voltage detection apparatus includes: a battery including unit cells mutually connected in series; a first block including at least one of the unit cells; a second block including at least one of the unit cells, and provided adjacent to the first block; a first voltage detector connected to the first block, which detects a voltage between both ends of the unit cell in the first block, and which includes: a current source; a current detection element connected to the current source; and a voltage measuring unit which detects a voltage between both ends of the current detection element; and a second voltage detector connected to the second block, which has a similar construction with the first voltage detector. An abnormality detector of the voltage detection apparatus detects an abnormality of the voltage detectors in accordance with the voltages between both ends of the current detection elements. | 03-11-2010 |
| 20100301868 | VOLTAGE MONITORING APPARATUS - A voltage monitoring apparatus includes a plurality of voltage monitoring sections corresponding to a plurality of blocks of unit cells of a multiple-set battery respectively and a main control section. Each of the voltage monitoring section includes a voltage detection section which detects voltages of the unit cells of a corresponding block, a voltage adjustment section which adjusts the voltages of the unit cells of the corresponding block so that the voltages are uniformized, an active power source which obtains power from the unit cells of the corresponding block, and supplies power to the voltage detection section and the voltage adjustment section, a power source switching section which switches a power supply mode and a power disconnect mode of the active power source, and a low consumption power source which obtains the power from the unit cells of the corresponding block, and supplies power to the power source switching section. The main control section includes a failure diagnosis section which performs a failure diagnosis of each of the voltage monitoring sections, and a switching control section which controls to disconnect a supply of the power from the active power source when a result of the failure diagnosis indicates a failure. | 12-02-2010 |
| 20100308835 | VOLTAGE MONITORING DEVICE FOR ASSEMBLED BATTERY - There is provided a voltage monitoring apparatus for monitoring an output voltage of an assembled battery. The voltage monitoring apparatus comprises: voltage monitoring sections, each section monitoring a voltage of each block of the plurality of blocks into which the plurality of unit cells are divided, wherein the voltage monitoring sections are connected one another through communication lines; and a control unit which is connected to the voltage monitoring section through the communication lines. The voltage monitoring section compares the respective detected voltages of the unit cells with the threshold voltage to determine a result of the comparison, and transmits the comparison result to the control unit. In a case where the threshold voltage is changed, the control unit transmits a registration signal indicating the changed threshold voltage, and when received the registration signal, the voltage monitoring section changes the stored threshold voltage to the changed threshold voltage. | 12-09-2010 |
| 20100321026 | VOLTAGE MEASURING APPARATUS FOR ASSEMBLED BATTERY - There is provided a voltage measuring apparatus for measuring a voltage of an assembled battery in which a plurality of unit cells are connected in series. The voltage measuring apparatus comprises: block voltage detection sections, each section measuring a voltage of each block of a plurality of blocks into which the plurality of unit cells are divided; a reference voltage output section provided in each of the voltage detection sections to output a reference voltage; a difference voltage calculating section which calculates a difference voltage between measured values of the reference voltages measured by two block voltage detection sections; a difference voltage determination section which determines whether each of the difference voltages exceeds a given threshold voltage or not; and an abnormality determination section which determines that abnormality occurs in the voltage measuring apparatus when at least one of the difference voltages is determined as greater than the threshold voltage. | 12-23-2010 |
| 20100327808 | CONTROL UNIT - A control unit includes a control device that outputs a first command signal to an equalizing unit, which has a discharge circuit for solving a dispersion of cell voltage in respective cells of a battery and a switch unit for connecting the discharge circuit to at least one of the cells, and a command signal outputting circuit that outputs a second command signal to the equalizing unit so that a connection between the discharge circuit and the at least one of the cells is forcibly disconnected, when an abnormal operation of the control device, disabling an output of the first command signal, is detected. When the equalizing unit receives the first command signal, the discharge circuit is connected to the at least one of the cells by the switch unit to discharge the at least one of the cells. | 12-30-2010 |
| 20110031976 | VOLTAGE MEASURING APPARATUS FOR ASSEMBLED BATTERY - A voltage measuring apparatus measures an output voltage of an assembled battery in which a plurality of unit cells are connected in series and are divided into a plurality of blocks. The apparatus includes: a block voltage detection section which detects a voltage of at least one of the plurality of blocks and provides an analog voltage signal; a reference power supply which generates a reference voltage; a sampling voltage generation section which generates a sampling voltage based on the reference voltage; a storage for storing voltage date corresponding to the sampling voltage; and an A/D conversion section of the block voltage detection section that digitizes the sampling voltage with the reference voltage for A/D conversion. A difference between the digitized sampling voltage and the voltage data is calculated and it is determined that abnormality occurs in the A/D conversion section when the difference is larger than a threshold. | 02-10-2011 |
| 20110050236 | STATE MONITORING UNIT FOR ASSEMBLED BATTERY - A state monitoring unit monitors a state of an assembled battery in which unit cells are connected in series. The state monitoring unit includes a plurality of voltage monitoring devices and a controller. The controller transmits a common voltage measurement command to the voltage monitoring devices connected in a daisy-chain scheme. Each of the voltage monitoring devices measures the voltage of the corresponding unit cells in response to the command that is received from the controller or the adjacent voltage monitoring device at a leading end of the communication channel, and transmits the command to the adjacent voltage monitoring device at a termination of the communication channel. When received the measured voltage from the adjacent voltage monitoring device at the termination, the voltage monitoring device transmits it with the own measured voltage. The controller determines the abnormality in reception state based on the number of received, measured voltages. | 03-03-2011 |
| 20110050237 | STATE MONITORING UNIT FOR ASSEMBLED BATTERY - A state monitoring unit monitors a state of an assembled battery in which a plurality of unit cells are connected in series. The state monitoring unit includes: a plurality of voltage monitoring devices provided in a high voltage side and a controller provided in a low voltage side electrically isolated with the high voltage side. The controller transmits a common voltage measurement command to the respective voltage monitoring devices connected via a communication channel in a daisy-chain scheme. The controller includes a storage for storing latency time determined based on a required time for each of the voltage monitoring devices elapsing from transmission of the common voltage measurement command with respect to the communication channel to voltage measurement of the unit cells, and measures charging/discharging current of the assembled battery when the latency time has elapsed from the transmission of the common voltage measurement command with respect to the communication channel. | 03-03-2011 |
| 20110057659 | VOLTAGE MEASURING DEVICE - A voltage measuring device includes a current detecting section that detects a charging or discharging current of a multiple-set battery; block voltage detecting sections that detect voltages of a plurality blocks respectively; and a control section that outputs a request to the block voltage detecting sections via a first communication line to acquire voltage data. Each of the block voltage detecting sections includes an active power source and a lower-power source. The control section transmits a low-power consumption mode setting signal to the block voltage detecting sections respectively when the charging or discharging current has not been detected by the current detecting section for a first time period. Each of the block voltage detecting sections switches an operating mode from a normal mode to a low-power consumption mode when the low-power consumption mode setting signal is received. | 03-10-2011 |
