Abstract: A calibration method of a battery electronic control unit (ECU) according to the present disclosure uses an inspection device. The battery ECU includes a first high-frequency signal supplying unit that supplies a first high-frequency signal of 0.1 MHz or higher to a lithium-ion secondary battery, and a first detecting unit that detects a value of a real part of alternating current impedance from the lithium-ion secondary battery where the first high-frequency signal has been supplied. The inspection device can detect the value of the real part of the alternating current impedance from the lithium-ion secondary battery with higher precision than the battery ECU. In the calibration method of the battery ECU, in a shipping inspection process of the lithium-ion secondary battery, an ECU impedance measurement value is acquired by detecting the value of the real part of the alternating current impedance of the lithium-ion secondary battery, using the battery ECU.

Abstract: A battery management system according to the present disclosure includes at least: a three-phase inverter configured to be driven by electric power from a lithium-ion secondary battery; a control unit configured to heat the lithium-ion secondary battery by supplying, to the lithium-ion secondary battery, an alternating current signal of a predetermined frequency generated by the three-phase inverter; and an impedance detection unit configured to detect, from an attenuation characteristic of a high-frequency signal in the lithium-ion secondary battery, a value of the real part of an alternating current impedance used for calculation of the amount of Li deposition. The impedance detection unit is configured to detect a peak voltage of the alternating current signal supplied from the three-phase inverter to the lithium-ion secondary battery.

Abstract: A battery management system according to the present disclosure includes a three-phase inverter, and an impedance detecting unit that detects two or more peak voltages of a high frequency signal in a lithium-ion secondary battery and calculates an attenuation characteristic, and detects, from the calculated attenuation characteristic, a real part of an alternating current impedance used to calculate amount of Li deposition, and further includes a control unit that supplies an alternating current signal that is a test signal generated by the three-phase inverter to the lithium ion secondary battery in test mode, and a correction unit that performs correction of a value of peak voltage of the high-frequency signal corresponding to the test signal that is detected by the impedance detecting unit, based on difference between peak voltage of the test signal detected by the impedance detecting unit and a theoretical value of peak voltage of the test signal.

Abstract: A battery management device includes: an acquisition unit that acquires a degradation evaluation value for evaluating a degree of advance of a high-rate degradation state of a lithium-ion secondary battery; a high-frequency signal supply unit that supplies a high-frequency signal at a frequency of 0.1 MHz or higher to the lithium-ion secondary battery; a detection unit that detects a value of a real part of alternating current impedance from the lithium-ion secondary battery supplied with the high-frequency signal; a calculation unit that calculates an amount of Li deposition in the lithium-ion secondary battery from the detected value of the real part of the alternating current impedance; and a control unit that, as the calculated amount of Li deposition increases, reduces an upper-limit degradation evaluation value for the lithium-ion secondary battery that is a criterion for determining whether the lithium-ion secondary battery is expected to reach the high-rate degradation state.

Abstract: A battery system includes a battery made of a lithium-ion secondary battery, a sensor group configured to detect a voltage, a current, and a temperature of the battery, and a control device configured to control a charging current of the battery based on detection values of the sensor group. The control device is configured to acquire a deterioration state of the battery from the detection values of the sensor group, and set a threshold voltage at which lithium metal is deposited on an electrode of the lithium-ion secondary battery with respect to the voltage of the battery, in accordance with the acquired deterioration state of the battery. The control device is configured to reduce, when the voltage of the battery exceeds the threshold voltage during charging of the battery, the charging current to a limit current.

Abstract: A battery management device includes a high-frequency signal supply unit configured to apply a high-frequency signal having a frequency equal to or higher than 0.1 MHz to a first battery cell having a low battery temperature among a plurality of battery cells constituting a lithium-ion secondary battery, an impedance detection unit configured to detect a real part of alternating current impedance of the first battery cell to which the high-frequency signal is applied, and a determination unit configured to determine whether Li has been precipitated in the lithium-ion secondary battery based on the real part of the alternating current impedance of the first battery cell.

Abstract: A heating control system includes a three-phase inverter configured to be driven using electric power of a lithium ion secondary battery, a control unit configured to heat the lithium ion secondary battery by supplying current generated by the three-phase inverter to the lithium ion secondary battery, a high-frequency signal supply unit configured to supply a high-frequency signal with a frequency of 0.1 MHz or higher to the lithium ion secondary battery, a detecting unit configured to detect a value of a real part of alternating-current impedance from the lithium ion secondary battery to which the high-frequency signal has been supplied, and a calculation unit configured to calculate an amount of Li deposition in the lithium ion secondary battery from the detected value of the real part of alternating-current impedance.

Abstract: A battery management device according to the present disclosure includes a high-frequency signal supplying unit applying a high-frequency signal with a frequency of 0.1 MHz or higher to a lithium-ion secondary battery, a storage unit storing a real part of alternating current impedance of the lithium-ion secondary battery to which the high frequency signal is applied at a first point in time, as a reference value for each battery temperature, an impedance detecting unit detecting the real part of the alternating current impedance of the lithium ion secondary battery to which the high frequency signal is applied at a second point in time after the first point in time, at a certain battery temperature, and a determining unit determining whether there is deposition of lithium in the lithium ion secondary battery, based on the real part of the alternating current impedance detected and the reference value at the battery temperature.

Abstract: A battery management apparatus, a battery management method, and a program capable of detecting an abnormality in a circuit that monitors the battery voltage of a lithium-ion secondary battery are provided. A battery management apparatus includes a first measurement circuit configured to measure a battery voltage of a lithium-ion secondary battery, a second measurement circuit configured to apply a high-frequency signal of 0.1 MHz or higher to the lithium-ion secondary battery and measure an amplitude of a resonating electric signal, and an abnormality detection unit configured to calculate the battery voltage of the lithium-ion secondary battery from the amplitude of the electric signal and detect an abnormality in the first measurement circuit based on the calculated battery voltage.

Abstract: A battery management apparatus according to the present disclosure includes: an AC signal supply unit configured to supply an AC signal to a lithium-ion secondary battery; an impedance detection unit configured to detect a value of a real part of an AC impedance from the lithium-ion secondary battery to which the AC signal has been supplied; an expansion amount calculation unit configured to calculate an amount of expansion of a cell in the lithium-ion secondary battery based on a difference between the detected current value of the real part of the AC impedance and an initial value of the real part of the AC impedance; and a control unit configured to decrease an upper limit value of a state of charge of the lithium-ion secondary battery as the calculated amount of expansion increases.

Abstract: A battery management apparatus according to the present disclosure includes: a temperature detection unit configured to detect a temperature of a lithium-ion secondary battery; a high-frequency signal supply unit configured to supply a high-frequency signal of 0.1 MHz or higher to the lithium-ion secondary battery; an impedance detection unit configured to detect a value of a real part of an AC impedance from the lithium-ion secondary battery to which the high-frequency signal has been supplied; a calculation unit configured to calculate an amount of Li precipitation in the lithium-ion secondary battery from the detected value of the real part of the AC impedance; and a control unit configured to, based on the calculated amount of Li precipitation in the lithium-ion secondary battery, control an allowable charging power for the lithium-ion secondary battery and control an upper limit temperature of the lithium-ion secondary battery.

Abstract: A battery management device according to the present disclosure includes: a high-frequency signal supply unit that supplies a high-frequency signal having 0.1 MHz or higher, to a lithium-ion secondary battery; an impedance detection unit that detects a value of a real part of an alternating-current impedance, from the lithium-ion secondary battery to which the high-frequency signal is supplied; a calculation unit that calculates a Li deposition amount in the lithium-ion secondary battery, from the detected value of the real part of the alternating-current impedance; and a control unit that decreases an allowable charging power for the lithium-ion secondary battery as the calculated Li deposition amount is larger.

Abstract: When a voltage value of an electrical storage device becomes higher than a predetermined voltage value for identifying an overcharged state of the electrical storage device, calculation of a heat generation amount of the electrical storage device based on a current value is started. When the calculated heat generation amount is larger than a predetermined amount, it is determined that the electrical storage device is in an abnormal state (abnormal state related to heating). Because the electrical storage device enters an easily heated state when the voltage value becomes higher than the predetermined voltage value, the heat generation amount may be monitored by starting calculation of the heat generation amount. Once the voltage value becomes higher than the predetermined voltage value, irrespective of a high/low relationship between the voltage value and the predetermined voltage value, the abnormal state may be determined by monitoring the heat generation amount.

Abstract: A power supply system includes a controller. The controller is configured to; a) control charging and discharging of an electrical storage device upon reception of an output of a current sensor and a voltage sensor, b) calculate a control current value by subtracting an offset value from a detected value of the current sensor, c) calculate a first determination result and a second determination result, respectively obtained by determining whether the electrical storage device is being charged or discharged based on the control current value, and based on a change in a remaining amount of charge of the electrical storage device, and d) when the first determination result and the second determination result differ from each other, change the offset value such that the first determination result coincides with the second determination result.

Abstract: A control system for a battery includes a current sensor and an electronic control unit. The electronic control unit is configured to calculate a first error and a second offset error of the current sensor respectively based on outputs of the current sensor just before a stop of the electronic control unit and at startup of the electronic control unit. The electronic control unit is configured to correct an output of the current sensor by using a first error when a temperature of the current sensor at startup of the electronic control unit is higher than or equal to a threshold temperature, and correct the output of the current sensor by using a second error when the temperature of the current sensor at startup of the electronic control unit is lower than the threshold temperature.

Abstract: When a catalyst temperature is lower than a predetermined temperature on a second or subsequent start of an engine since system activation of a vehicle, a catalyst warm-up request is output for the purpose of warming up a catalyst in a catalytic converter. An output limit Wout of a battery is not increased in response to a second or subsequent output of the catalyst warm-up request, while being increased in response to a first output of the catalyst warm-up request. Accordingly, the catalyst warm-up in response to the second or subsequent output of the catalyst warm-up request since the system activation suppresses excessive output of electric power from the battery and thereby suppresses deterioration of the battery. Catalyst warm-up is performed in response to the second or subsequent output of the catalyst warm-up request. This suppresses deterioration of emission.

Abstract: In the present invention, in a vehicle equipped with an engine, a dynamo-electric machine, and a secondary cell as a power storage device, when supplying of electric power from the engine to the power storage device is stopped, an indicator value indicating the degree to which the ion concentration in an electrolytic solution is biased by discharging of the power storage device is acquired, a shift position is acquired from a shift lever mechanism of the vehicle, the acquired shift position is the neutral position, and the acquired indicator value exceeds a threshold value at which cell degradation occurs, the charging/discharging control device for an onboard secondary cell according to the present invention causes a notification means to issue a notification as a warning to change from the neutral position to another shift position.

Abstract: A power supply system includes a controller. The controller is configured to; a) control charging and discharging of an electrical storage device upon reception of an output of a current sensor and a voltage sensor, b) calculate a control current value by subtracting an offset value from a detected value of the current sensor, c) calculate a first determination result and a second determination result, respectively obtained by determining whether the electrical storage device is being charged or discharged based on the control current value, and based on a change in a remaining amount of charge of the electrical storage device, and d) when the first determination result and the second determination result differ from each other, change the offset value such that the first determination result coincides with the second determination result.

Abstract: A control system for a battery includes a current sensor and an electronic control unit. The electronic control unit is configured to calculate a first error and a second offset error of the current sensor respectively based on outputs of the current sensor just before a stop of the electronic control unit and at startup of the electronic control unit. The electronic control unit is configured to correct an output of the current sensor by using a first error when a temperature of the current sensor at startup of the electronic control unit is higher than or equal to a threshold temperature, and correct the output of the current sensor by using a second error when the temperature of the current sensor at startup of the electronic control unit is lower than the threshold temperature.

Abstract: When a voltage value of an electrical storage device becomes higher than a predetermined voltage value for identifying an overcharged state of the electrical storage device, calculation of a heat generation amount of the electrical storage device based on a current value is started. When the calculated heat generation amount is larger than a predetermined amount, it is determined that the electrical storage device is in an abnormal state (abnormal state related to heating). Because the electrical storage device enters an easily heated state when the voltage value becomes higher than the predetermined voltage value, the heat generation amount may be monitored by starting calculation of the heat generation amount. Once the voltage value becomes higher than the predetermined voltage value, irrespective of a high/low relationship between the voltage value and the predetermined voltage value, the abnormal state may be determined by monitoring the heat generation amount.