Abstract: A current of a storage battery is appropriately controlled depending on the situation. In a battery controller, a battery information acquiring unit acquires information on the storage battery. A first allowable current calculating unit calculates a first allowable current of a battery module in accordance with a rated value of a component through which a current flows by charging or discharging of the battery module. A second allowable current calculating unit calculates a second allowable current of the battery module in accordance with an SOC of the battery module on the basis of the information acquired by the battery information acquiring unit. A third allowable current calculating unit calculates a third allowable current of the battery module in accordance with an SOH of the battery module on the basis of the information acquired by the battery information acquiring unit.

Abstract: In the battery control system pertaining to the present invention, one antenna is provided for each cell controller or each group of cell controllers. A battery controller switches between antennas by using a switch and performs wireless communication with each cell controller or each group of cell controllers. Hence, even if the number of cell controllers increases, a countermeasure can be taken by adding antennas and changing switches, and an increase in the number of battery controllers can be suppressed.

Abstract: The purpose of the present invention is to provide a battery control system which enables extending the communication range between a cell controller and a battery controller while keeping power consumption in the cell controller low and which is capable of ensuring communication reliability. In this battery control system, after transmitting a response request to the cell controller, the battery controller transmits to the cell controller a non-modulated wave having a power level lower than that of the response request, and the cell controller generates a response signal by performing amplitude-modulation on the non-modulated wave (see FIG. 6).

Abstract: A battery control device capable of obtaining an allowable charge/discharge current value can further accurately reflect a polarization state of a battery. A battery controller includes a first allowable current value calculation unit, a battery equivalent circuit model, and a correction amount calculation unit. Assuming a non-polarization state, a current limit value of the battery based on an open circuit voltage and upper and lower limit voltages set in the battery, the first allowable current value calculation unit calculates a first allowable current value Imax1. The battery equivalent circuit model estimates a polarization state of the battery when the current limit value is being calculated. The correction unit calculates an allowable current value correction value based on the estimated polarization state for correcting Imax1. A second allowable current value Imax2 which is the corrected first allowable current value is output as an allowable charge/discharge current value of the battery.

Abstract: To perform charge/discharge control of a storage battery at an appropriate timing. In a battery controller, a battery information acquisition unit acquires information on the storage battery. A degradation progression rate calculation unit calculates a degradation progression rate of the storage battery based on the information acquired by the battery information acquisition unit. A limit value setting unit sets a limit value for controlling charge/discharge of the storage battery based on the degradation progression rate calculated by the degradation progression rate calculation unit. A timing determination unit determines a timing at which the limit value needs to be output based on the information acquired by the battery information acquisition unit. A limit value output unit outputs the limit value to a host controller based on the timing determined by the timing determination unit.

Abstract: A current of a storage battery is appropriately controlled depending on the situation. In a battery controller, a battery information acquiring unit acquires information on the storage battery. A first allowable current calculating unit calculates a first allowable current of a battery module in accordance with a rated value of a component through which a current flows by charging or discharging of the battery module. A second allowable current calculating unit calculates a second allowable current of the battery module in accordance with an SOC of the battery module on the basis of the information acquired by the battery information acquiring unit. A third allowable current calculating unit calculates a third allowable current of the battery module in accordance with an SOH of the battery module on the basis of the information acquired by the battery information acquiring unit.

Abstract: A current of a storage battery is appropriately controlled depending on the situation. In a battery controller, a battery information acquiring unit acquires information on the storage battery. A first allowable current calculating unit calculates a first allowable current of a battery module in accordance with a rated value of a component through which a current flows by charging or discharging of the battery module. A second allowable current calculating unit calculates a second allowable current of the battery module in accordance with an SOC of the battery module on the basis of the information acquired by the battery information acquiring unit. A third allowable current calculating unit calculates a third allowable current of the battery module in accordance with an SOH of the battery module on the basis of the information acquired by the battery information acquiring unit.

Abstract: Provided is a battery management device capable of effectively utilizing battery performance while securing battery life. The battery management device includes: a divergence amount calculation unit that calculates a divergence amount between a life target value or a degradation amount target value of a storage battery, which is a secondary battery, and a life prediction value or a degradation amount prediction value according to use history of the storage battery in an arbitrary period; and a limit value change unit that changes charge/discharge limit values for controlling degradation of the storage battery based on the divergence amount. The limit value change unit includes a first limit value calculation unit that calculates a first limit value set that is a combination of the charge/discharge limit values for each of a plurality of types of control parameters that change in correlation with each other based on the divergence amount.

Abstract: A battery control device capable of obtaining an allowable charge/discharge current value can further accurately reflect a polarization state of a battery. A battery controller includes a first allowable current value calculation unit, a battery equivalent circuit model, and a correction amount calculation unit. Assuming a non-polarization state, a current limit value of the battery based on an open circuit voltage and upper and lower limit voltages set in the battery, the first allowable current value calculation unit calculates a first allowable current value Imax1. The battery equivalent circuit model estimates a polarization state of the battery when the current limit value is being calculated. The correction unit calculates an allowable current value correction value based on the estimated polarization state for correcting Imax1. A second allowable current value Imax2 which is the corrected first allowable current value is output as an allowable charge/discharge current value of the battery.

Abstract: A battery control device capable of obtaining an allowable charge/discharge current value can further accurately reflect a polarization state of a battery. A battery controller includes a first allowable current value calculation unit, a battery equivalent circuit model, and a correction amount calculation unit. Assuming a non-polarization state, a current limit value of the battery based on an open circuit voltage and upper and lower limit voltages set in the battery, the first allowable current value calculation unit calculates a first allowable current value Imax1. The battery equivalent circuit model estimates a polarization state of the battery when the current limit value is being calculated. The correction unit calculates an allowable current value correction value based on the estimated polarization state for correcting Imax1. A second allowable current value Imax2 which is the corrected first allowable current value is output as an allowable charge/discharge current value of the battery.

Abstract: An object of the invention is to improve communication quality in a power storage management system. The above-mentioned problem may be solved by the following one solution. When a communication error where transmission, reception, or both transmission and reception of a signal is not allowed occurs between one or a plurality of a plurality of information acquisition devices that acquires states of a plurality of power storage cells and an information collection device that communicates with the plurality of information acquisition devices in a time-division manner, and collects information related to the states of the plurality of power storage cells acquired by the plurality of respective information acquisition devices, a process for resolving a communication error is executed by putting all the plurality of information acquisition devices in a state in which communication with the information collection device is allowed at all times.

Abstract: In a power storage system equipped with a secondary battery, a control system of the secondary battery includes a unit which detects an index indicating a degradation state of a positive electrode, a unit which detects an index indicating a degradation state of a negative electrode, a unit which calculates a difference between the index of the positive electrode and the index of the negative electrode, a unit which determines a sign of the difference, and a unit which changes an operation condition of the secondary battery according to the sign. With this configuration, in the control of the secondary battery, it is possible to avoid a life estimation accuracy from being decreased while using a processor which has a high-speed processing performance and is inexpensive.

Abstract: A wireless battery system is provided in which wireless communication errors are reduced and CC's power consumption is less. A wireless battery system including a plurality of cell controllers connected to battery cells and a battery controller which is connected by radio with the plurality of cell controllers, wherein the battery controller and the plurality of cell controllers are connected by radio in a daisy chain manner and the plurality of cell controllers are controlled by passive reception. This makes it possible to provide a wireless battery system in which wireless communication errors are reduced and CC's power consumption is less.

Abstract: The purpose of the present invention is to provide a battery control system which enables extending the communication range between a cell controller and a battery controller while keeping power consumption in the cell controller low and which is capable of ensuring communication reliability. In this battery control system, after transmitting a response request to the cell controller, the battery controller transmits to the cell controller a non-modulated wave having a power level lower than that of the response request, and the cell controller generates a response signal by performing amplitude-modulation on the non-modulated wave (see FIG. 6).

Abstract: An object of the present invention is to provide a wireless communication technique which can measure a physical state of the measurement object with high accuracy and can transmit the measurement result rapidly. The communication device according to the present invention wirelessly transmits the measurement result during a first time slot, and starts measurement during a second time slot which differs from the first time slot (see FIG. 3).

Abstract: In the battery control system pertaining to the present invention, one antenna is provided for each cell controller or each group of cell controllers. A battery controller switches between antennas by using a switch and performs wireless communication with each cell controller or each group of cell controllers. Hence, even if the number of cell controllers increases, a countermeasure can be taken by adding antennas and changing switches, and an increase in the number of battery controllers can be suppressed.

Abstract: There is provided a wireless battery system reconcilable with unsuccessful communication due to interference from an external wireless instrument or radio wave reflection or shielding under a surrounding physical environment. A wireless battery system allocates a cell controller to a cell, detects a cell state, and wirelessly communicates a cell state detected by a cell controller to a battery controller. During the wireless communication, the battery controller transmits a beacon to the cell controller and specifies a duration for radio wave environment measurement and a frequency to be measured as a condition. The cell controller performs radio wave environment measurement under the specified condition and then returns a measurement result along with the cell state to the battery controller.

Abstract: A battery control system is provided with a plurality of battery cell management devices that are provided respectively corresponding to a plurality of battery cell groups each constituted by one or a plurality of battery cells and each acquire a measurement result of the state of charge of the battery cell of the corresponding battery cell group and an assembled battery management device for wirelessly communicating with the battery cell management devices. When it is impossible to wirelessly communicate with any of the battery cell management devices, the assembled battery management device wirelessly communicates with the said any of the battery cell management devices via any of other battery cell management devices except the said any of the battery cell management devices.

Abstract: Provided is a battery management device capable of effectively utilizing battery performance while securing battery life. The battery management device includes: a divergence amount calculation unit that calculates a divergence amount between a life target value or a degradation amount target value of a storage battery, which is a secondary battery, and a life prediction value or a degradation amount prediction value according to use history of the storage battery in an arbitrary period; and a limit value change unit that changes charge/discharge limit values for controlling degradation of the storage battery based on the divergence amount. The limit value change unit includes a first limit value calculation unit that calculates a first limit value set that is a combination of the charge/discharge limit values for each of a plurality of types of control parameters that change in correlation with each other based on the divergence amount.

Abstract: In a power storage system equipped with a secondary battery, a control system of the secondary battery includes a unit which detects an index indicating a degradation state of a positive electrode, a unit which detects an index indicating a degradation state of a negative electrode, a unit which calculates a difference between the index of the positive electrode and the index of the negative electrode, a unit which determines a sign of the difference, and a unit which changes an operation condition of the secondary battery according to the sign. With this configuration, in the control of the secondary battery, it is possible to avoid a life estimation accuracy from being decreased while using a processor which has a high-speed processing performance and inexpensive.