Patent application number | Description | Published |
20100241376 | CONTROL APPARATUS AND CONTROL METHOD FOR SECONDARY BATTERY - An ECU calculates an evaluation value decrease amount D(−) in response to a reduction of unevenness of lithium ion concentration caused by diffusion of lithium ions resulting from a lapse of one cycle time ΔT, calculates an evaluation value increase amount D(+) in response to an increase of the unevenness of the lithium ion concentration caused by discharging during a lapse of one cycle time ΔT, and calculates a present value D(N) of a battery deterioration evaluation value D due to high-rate discharging, as a previous value D(N−1)−evaluation value decrease amount D(−)+evaluation value increase amount D(+). If battery deterioration evaluation value D exceeds a predetermined target value E, the ECU sets a discharging power limit value WOUT that is a limit value of electric power to be discharged from a battery, to a value lower than a maximum value W(MAX). | 09-23-2010 |
20110059341 | ELECTRIC VEHICLE - An electric vehicle is provided with a cell voltage sensor ( | 03-10-2011 |
20110127958 | BATTERY CHARGE/DISCHARGE CONTROL DEVICE AND HYBRID VEHICLE USING THE SAME - A battery charge/discharge control device ( | 06-02-2011 |
20110320082 | HYBRID VEHICLE CONTROLLER AND CONTROL METHOD - A charge/discharge power upper limit value is set by referencing different maps for a catalyst warm-up period and other period so as to limit charge/discharge of a main battery in accordance with increase of the battery temperature. As a result, during the catalyst warm-up period, a limit start temperature at which a limit of the charge/discharge power is started and a charge/discharge inhibit temperature at which the charge/discharge is inhibited are set in accordance with the characteristic of the main battery. During a period other than the catalyst warm-up period, the limit start temperature and the charge/discharge inhibit temperature are set lower than during the catalyst warm-up period. | 12-29-2011 |
20120001639 | VOLTAGE MONITOR - A first monitor circuit | 01-05-2012 |
20120187908 | BATTERY PACK CONTROL APPARATUS - A plurality of voltage switching circuits | 07-26-2012 |
20120215472 | NONAQUEOUS ELECTROLYTE SOLUTION TYPE LITHIUM ION SECONDARY BATTERY SYSTEM, METHOD FOR DETERMINING LITHIUM DEPOSITION IN THAT SYSTEM, AND VEHICLE PROVIDED WITH THAT SYSTEM - A battery system includes a discharge amount obtaining portion that obtains a discharge amount (determination zone discharge amount) from a determination start voltage until a predetermined determination end voltage of a battery; an internal resistance obtaining portion that obtains an internal resistance value of the battery; a correlation map in which a combination of internal resistance value information and determination zone discharge amount information for a battery that is the same kind as a target of a determination and in which lithium deposition has not occurred is stored for each degree of age-related deterioration of the battery; and a deposition determining portion that determines a degree of lithium deposition in the target battery by comparing the determination zone discharge amount during the determination of the target battery with the internal resistance value during the determination of the target battery on the same scale by converting at least one via the correlation map. | 08-23-2012 |
20120242344 | ABNORMALITY DETECTING SYSTEM FOR BATTERY ASSEMBLY - An abnormality detecting system sequentially compares the output voltages of n-piece battery cells that are connected in series, with a criteria voltage, at respective points in time Tv | 09-27-2012 |
20120262180 | BATTERY PACK FAILURE DETECTION DEVICE - Each detection unit is configured to compare a voltage output from a battery cell associated therewith a predetermined criterion voltage. A plurality of detection units operate sequentially in response to a start trigger and also sequentially transmit a signal that reflects a result of comparing the voltages to detect whether a battery pack has a low cell voltage fault. A fault monitoring device detects an internal resistance fault when it receives from a transmission circuit a determination signal indicating that the battery pack when electrically discharged has any of its battery cells outputting a voltage decreased to be lower than the criterion voltage and if a current detected has a value smaller in magnitude than a criterion current corresponding to a value of a current obtained by dividing a difference in voltage between an open circuit voltage of the battery cell and the criterion voltage by an upper limit value for internal resistance. | 10-18-2012 |
20130049973 | DEVICE AND METHOD FOR CONTROLLING RECHARGEABLE BATTERY - The calculation unit converts into a battery age each parameter calculated for a different factor of degradation of a battery. If at least one of the battery ages has reached an upper limit age, the determination unit determines that it is necessary to conduct a battery diagnosis. Once it has been determined that it is necessary to conduct the battery diagnosis, the display control unit causes a display device to display a diagnosis request message. After displaying the diagnosis request message has started if there is no result of the battery diagnosis received the electric power limiter unit limits electric power charged to and discharged from the battery. After the electric power charged to/discharged from the battery is limited if there is no result of the battery diagnosis received the start-up prohibition unit prohibits starting a system driving the vehicle. | 02-28-2013 |
20130132011 | DEVICE AND METHOD FOR DIAGNOSING RECHARGEABLE BATTERY, AND VEHICLE - A diagnostic device diagnoses a lithium ion battery including a plurality of battery blocks. If a condition is established for starting a diagnosis, the diagnostic device starts discharging the battery, and after each battery block has a voltage decreased to a measurement starting voltage until the block has the voltage decreased to a measurement ending voltage the block discharges an amount of power, which the diagnostic device calculates for the battery block. If all blocks each discharge power in an amount larger than a brand-new product threshold value the diagnostic device determines that the battery is in a brand new condition. If all blocks each discharge power in an amount larger than a uselessness threshold value the diagnostic device determines that the battery is useful. If at least one block discharges power in an amount smaller than the uselessness threshold value the diagnostic device determines that the battery is useless. | 05-23-2013 |
20130264975 | ELECTRICALLY POWERED VEHICLE AND METHOD FOR CONTROLLING THE SAME - A converter is disposed between a first battery and a power line for transmitting power inputted to and outputted from a motor for traveling. A second battery, on the other hand, is connected to the power line with a relay being interposed therebetween. A control unit controls the relay to be turned on or off in accordance with an operating state of the motor. | 10-10-2013 |
20130320766 | ELECTRIC STORAGE SYSTEM - An electric storage system includes an electric storage apparatus, relays, a plurality of smoothing capacitors, and a current limiting resistance. The electric storage apparatus has a plurality of electric storage elements connected in series. Each of the electric storage elements includes a current breaker breaking an electric current path inside the electric storage element. The plurality of smoothing capacitors are connected in series between a positive electrode line and a negative electrode line which connect the electric storage apparatus to a load. Each of the relays is placed on the positive electrode line, the negative electrode line, and an intermediate line. The intermediate line connects a connecting point of two of the electric storage elements included in the electric storage apparatus and a connecting point of the plurality of smoothing capacitors. The current limiting resistance is also placed on the intermediate line. | 12-05-2013 |
20140021919 | ELECTRICALLY POWERED VEHICLE AND METHOD FOR CONTROLLING SAME - A hybrid vehicle, which is illustrated as a representative example of an electrically powered vehicle, includes: a power storage device in which deposition-related deterioration takes place due to a phenomenon of deposition of metal on an electrode surface during charging; a power generating structure for generating charging power for the power storage device; a charge state estimating unit for estimating a remaining level of the power storage device based on a state value of the power storage device; and a charging/discharging control unit for controlling charging/discharging of the power storage device based on the remaining level estimate value estimated by the charge state estimating unit. The charging/discharging control unit restricts the power generating structure from generating the charging power for the power storage device when the remaining level estimate value is decreased to fall below a predetermined criteria value. | 01-23-2014 |
20140055094 | BATTERY SYSTEM AND CONTROL METHOD THEREOF - The first battery is configured to be charged and discharged with a larger current than the second battery. The second battery has a higher storage capacity than the first battery. When the voltage of the second battery is lower than the voltage of the first battery, the controller allows charging of the second battery through the second relay while prohibiting charging of the first battery through the first relay until the voltage of the second battery reaches the voltage of the first battery. | 02-27-2014 |
20140159736 | DETERIORATION STATE ESTIMATION APPARATUS AND DETERIORATION STATE ESTIMATION METHOD FOR SECONDARY BATTERY - An estimation apparatus of estimating a deterioration state of a secondary battery has a current sensor measuring an electric current of the secondary battery, a current estimating section estimating the electric current of the secondary battery by using a battery model, and a deterioration estimating section estimating a second deterioration component produced in association with a salt concentration imbalance in the secondary battery. The deterioration estimating section estimates the second deterioration component by using the measured current obtained from the current sensor, the estimated current obtained from the current estimating section, and a first deterioration component produced in association with wear of the secondary battery. The deterioration estimating section corrects the estimated current by using a ratio between a resistance change rate of the secondary battery when the second deterioration component is eliminated and a resistance change rate during charge and discharge of the secondary battery. | 06-12-2014 |
Patent application number | Description | Published |
20090130538 | Battery Apparatus, Vehicle Having the Same Mounted Thereon, and Failure Determining Method for the Battery Apparatus - The high-voltage battery unit | 05-21-2009 |
20090315519 | CONTROL DEVICE FOR A SECONDARY BATTERY AND VEHICLE - A control device for a secondary battery includes an offset addition unit ( | 12-24-2009 |
20100010707 | CONTROL DEVICE FOR POWER STORAGE DEVICE AND VEHICLE - An SOC calculating unit calculates a first value based on an open voltage of a battery upon startup of a vehicle (when the operation of the battery starts), and has a calculated second value stored in a storage unit upon stop of the vehicle (when the operation of the battery ends). An initial value selecting unit selects the first value as an initial value when a predetermined condition is satisfied, and selects the second value as the initial value when this condition is not satisfied. In a case where the first value has low reliability, the second value is set as the initial value even if the second value may be deviated from an actual SOC value. This can reduce a difference between the SOC value stored in advance and the actual SOC value as compared with that in a case where the first value is set as the initial value. | 01-14-2010 |
20100204861 | CONTROL SYSTEM FOR SECONDARY BATTERY, ELECTRICALLY POWERED VEHICLE HAVING SAME, AND METHOD FOR CONTROLLING SECONDARY BATTERY - During use of a secondary battery, a concentration change ratio estimating unit estimates a ratio of change in electrolytic solution concentration based on a charging/discharging current. According to the estimated ratio of change, a concentration estimated value calculating unit sequentially calculates an electrolytic solution concentration estimated value during the use of the secondary battery. Based on the estimated electrolytic solution concentration estimated value, a determining unit determines whether or not the electrolytic solution concentration is within a normal range. When the electrolytic solution concentration is outside the normal range, a charging/discharging condition modifying unit modifies a charging/discharging condition of the secondary battery to bring the electrolytic solution concentration back to the normal range, thus avoiding a tendency of overcharge or a tendency of overdischarge. | 08-12-2010 |