Abstract: Provided is a battery pack producing method and a battery pack capable of suppressing defects such as overcharging or overdischarging in one or more of the used secondary batteries constituting a battery pack, and sufficiently exhibiting the performance of the used secondary batteries of the battery pack. This method includes an obtaining process for obtaining each full charge capacity of the used secondary batteries, a selecting process for selecting one or more used secondary batteries having similar full charge capacities from the used secondary batteries whose full charge capacities have been obtained, and an assembling process for assembling the selected secondary batteries.

Abstract: A device which judges a change of a capacity balance between a cathode and an anode of a secondary battery in a non-destructive manner is provided. The secondary battery has one of the capacities of the cathode and the anode greater than the other capacity. A battery ECU calculates an internal resistance (DCIR) of the secondary battery based on a current and a voltage of the secondary battery. When the calculated internal resistance (DCIR) is higher than the initial state in a low SOC region or a high SOC region, the battery ECU judges that the capacity balance between the cathode and the anode of the secondary battery has changed.

Abstract: When electric power exceeding output allowable power at an engine startup time is output from a power storage device, deviated from a predetermined period of time during which the output allowable power of the power storage device is switched, an ECU suppresses increase of the output allowable power for the next startup time of the engine. Specifically, the ECU modifies the output allowable power for the next startup time of the engine from a first value to a second value lower than the first value, based on a period of time before deviation is eliminated.

Abstract: An electrical storage device includes a plurality of power-generating elements, a case, and a valve. The power-generating elements perform charge and discharge and are connected electrically in series. A plurality of housing sections each accommodate one of the plurality of power-generating elements and are disposed along a predetermined direction. A communication path switches from a closed state to an opened state depending on the internal pressure of the housing section. When the communication path is in the opened state, gas can be moved between two of the housing sections adjacent to each other in the predetermined direction. The valve is provided for a particular housing section and releases gas produced within the case to the outside of the case. The empty space other than the power-generating element is present in each of the housing sections, and the empty space in the particular housing section is the largest.

Abstract: Provided are a battery pack manufacturing method, which can prevent a drawback where some of the used secondary batteries constituting a battery pack prematurely come to an end and which can suppress the enlargement of the temporary voltage difference between a used secondary battery at a charging/discharging time (especially in a low-temperature circumstance), and a battery pack. The battery pack manufacturing method includes an acquiring step of acquiring the individual internal resistances of used secondary batteries collected from the market, a selection step of selecting a plurality of the used secondary batteries having the internal resistances close to each other from a group of the used secondary batteries whose internal resistances have been acquired, and an assembling step of combining the used secondary batteries selected, to constitute the battery pack.

Abstract: A battery includes a battery element having positive and negative electrode plates and separators for insulating these electrode plates, and a battery case provided with a plurality of storing cavities divided by partitions for accommodating battery elements, each of the storing cavities of the battery case accommodating a battery element. The battery element has a positive current collector plate connected to the positive electrode plates and a negative current collector plate connected to the negative electrode plates on side faces on opposite sides from each other. Part of the positive and negative current collector plates respectively form a protruded portion protruding from an area along the side face of the battery element in an opposite direction from a bottom side of the storing cavities of the battery case.

Abstract: A two-dimensional map for calculating an SOC of a secondary battery is corrected. A battery ECU obtains a voltage index of a secondary battery. The voltage index is, for example, a no-load voltage of the secondary battery. When an amount of change of the calculated no-load voltage from an initial state falls outside a predefined range, the battery ECU corrects the two-dimensional map of initial state which is stored in advance in a storage unit using data obtained by statistically processing a plurality of two-dimensional maps obtained from a plurality of vehicles.

Abstract: The invention provides a method of adjusting a battery pack capable of reducing a difference in charge level between a plurality of secondary batteries constituting the battery pack and capable of restraining an increase in battery voltage difference between the secondary batteries of the battery pack in association with the adjustment of the charge level. A method of adjusting a battery pack includes a first adjusting process for discharging all secondary batteries of a first battery group so that charge levels of the secondary batteries of the first battery group fall within a charge level range determined based on a charge level of a secondary battery of a second battery group and further a second adjusting process for discharging all the secondary batteries of the first and second battery groups by the same electric quantity respectively.

Abstract: A reconstituted battery pack producing method comprises an obtaining process for obtaining, by use of one of a first charged-state control device having ever controlled a charged state of a used battery pack when it was used before and a second charged-state control device arranged to control the charged state of the used battery pack as with the first charged-state control device, a reference-time charge amount charged in each used secondary battery constituting the used battery pack; a selecting process for selecting more than one of the used secondary batteries close to each other in the reference-time charge amount from a group of the used secondary batteries whose reference-time charge amounts have been obtained; and an assembling process for combining and assembling the selected used secondary batteries into a new reconstituted battery pack.

Abstract: A device which judges a change of a capacity balance between a cathode and an anode of a secondary battery in a non-destructive manner is provided. The secondary battery has one of the capacities of the cathode and the anode greater than the other capacity. A battery ECU calculates an internal resistance (DCIR) of the secondary battery based on a current and a voltage of the secondary battery. When the calculated internal resistance (DCIR) is higher than the initial state in a low SOC region or a high SOC region, the battery ECU judges that the capacity balance between the cathode and the anode of the secondary battery has changed.

Abstract: A two-dimensional map for calculating an SOC of a secondary battery is corrected. A battery ECU obtains a voltage index of a secondary battery. The voltage index is, for example, a no-load voltage of the secondary battery. When an amount of change of the calculated no-load voltage from an initial state falls outside a predefined range, the battery ECU corrects the two-dimensional map of initial state which is stored in advance in a storage unit using data obtained by statistically processing a plurality of two-dimensional maps obtained from a plurality of vehicles.

Abstract: A battery pack capable of sufficiently exhibiting performance of each secondary battery constituting the battery pack and its producing method are provided. The battery pack producing method of the invention comprises an obtaining process for obtaining a charge amount voltage curve C during charging and a charge amount voltage curve D during discharging, a selecting process for selecting more than one of the used secondary batteries close to each other in curves C and D from a group of the used secondary batteries whose curves C and D have been obtained, and an assembling process for combining the selected used secondary batteries to constitute the battery pack.

Abstract: A battery characteristic detecting method according to the invention includes a first step in which constant current discharge from a battery is performed at a predetermined current value, and a voltage during constant current discharge is measured; a second step in which overpotential for mass transfer control in the battery or resistance for the mass transfer control in the battery is calculated based on the voltage measured in the first step; and a third step in which a determination that a characteristic change has occurred in the battery is made, when the overpotential for the mass transfer control in the battery or the resistance for the mass transfer control in the battery calculated in the second step is larger than a predetermined threshold value.

Abstract: Provided are a battery pack manufacturing method, which can prevent a drawback that some of used secondary batteries constituting a battery pack prematurely come to the end and which can suppress the enlargement of the temporary voltage difference between the used secondary battery at a charging/discharging time (especially in a low-temperature circumstance), and a battery pack. The battery pack manufacturing method comprises an acquiring step (Step S1) of acquiring the individual internal resistances of the secondary batteries already used, a selection step (Step S2) of selecting a plurality of the used secondary batteries having the internal resistances close to each other from a group of the used secondary batteries whose internal resistances have been acquired, and an assembling step (Step S3) of combining the used secondary batteries selected, to constitute the battery pack.

Abstract: A replacement method is provided for replacing a to-be-replaced battery module with a replacing fresh battery module in a battery assembly formed by electrically connecting a plurality of battery modules in series or parallel. The method includes the step (S110) of charging the fresh battery module so that the quantity of charged electricity of the fresh battery module is 5 to 20% less than the quantity of charged electricity of a battery module other than the to-be-replaced battery module, and the step (S120) of replacing the to-be-replaced battery module with the charged fresh battery module.

Abstract: A battery ECU executes a program that includes the steps of: sensing a vehicle speed; sensing a battery temperature; calculating a battery SOC; calculating, based on the battery temperature and battery SOC, a vehicle speed threshold value for starting charge limiting control; and setting a charge limiting flag for limiting an amount of electric energy to be to be charged even before regenerative braking, if the sensed vehicle speed is higher than the calculated vehicle speed threshold value.

Abstract: A reconstituted battery pack producing method comprises an obtaining process for obtaining, by use of one of a first charged-state control device having ever controlled a charged state of a used battery pack when it was used before and a second charged-state control device arranged to control the charged state of the used battery pack as with the first charged-state control device, a reference-time charge amount charged in each used secondary battery constituting the used battery pack; a selecting process for selecting more than one of the used secondary batteries close to each other in the reference-time charge amount from a group of the used secondary batteries whose reference-time charge amounts have been obtained; and an assembling process for combining and assembling the selected used secondary batteries into a new reconstituted battery pack.

Abstract: A battery pack capable of sufficiently exhibiting performance of each secondary battery constituting the battery pack and its producing method are provided. The battery pack producing method of the invention comprises an obtaining process for obtaining a charge amount voltage curve C during charging and a charge amount voltage curve D during discharging, a selecting process for selecting more than one of the used secondary batteries close to each other in curves C and D from a group of the used secondary batteries whose curves C and D have been obtained, and an assembling process for combining the selected used secondary batteries to constitute the battery pack.

Abstract: Provided is a battery pack producing method and a battery pack capable of suppressing defects such as overcharging or overdischarging in one or more of the used secondary batteries constituting a battery pack, and sufficiently exhibiting the performance of the used secondary batteries of the battery pack. This method includes an obtaining process for obtaining each full charge capacity of the used secondary batteries, a selecting process for selecting one or more used secondary batteries having similar full charge capacities from the used secondary batteries whose full charge capacities have been obtained, and an assembling process for assembling the selected secondary batteries.

Abstract: The invention provides a method of adjusting a battery pack capable of reducing a difference in charge level between a plurality of secondary batteries constituting the battery pack and capable of restraining an increase in battery voltage difference between the secondary batteries of the battery pack in association with the adjustment of the charge level. A method of adjusting a battery pack includes a first adjusting process for discharging all secondary batteries of a first battery group so that charge levels of the secondary batteries of the first battery group fall within a charge level range determined based on a charge level of a secondary battery of a second battery group and further a second adjusting process for discharging all the secondary batteries of the first and second battery groups by the same electric quantity respectively.