The present invention relates to a method for determining a state of charge of a battery, including: (a) acquiring a state of charge of the battery at a current sampling time point tn; (b) acquiring a voltage Vn, a temperature Tn, and a charging rate Cn of the battery at the current sampling time point tn, and a voltage Vi of the battery at a sampling time point ti, and calculating a voltage difference Vn−Vi between the voltage Vn and the voltage Vi; (c) when the voltage difference Vn−Vi is greater than or equal to a preset voltage threshold, calculating a voltage change rate; and (d) when the voltage change rate is greater than or equal to a preset voltage change rate threshold for the first time, acquiring a corrected state of charge of the battery as an actual state of charge of the battery.

Various embodiments of the present technology may comprise methods and apparatus to determine an RSOC value of a battery. The methods and apparatus may comprise utilizing various parameters, such as voltage and/or current, to calculate the RSOC of the battery. In various embodiments, the methods and apparatus may display one of a first RSOC and a second RSOC. In various embodiments, the methods and apparatus may further detect changes in the relevant parameter(s), adjust a previously-reported RSOC of the battery accordingly, and report the adjusted RSOC.

Various embodiments of the present technology may comprise methods and apparatus to determine an RSOC value of a battery. The methods and apparatus may comprise utilizing various parameters, such as voltage and/or current, to calculate the RSOC of the battery. In various embodiments, the methods and apparatus may display one of a first RSOC and a second RSOC. In various embodiments, the methods and apparatus may further detect changes in the relevant parameter(s), adjust a previously-reported RSOC of the battery accordingly, and report the adjusted RSOC.

A storage battery device includes a plurality of cell modules including a plurality of battery cells, a data acquirer configured to acquire voltage data of the battery cells, a calculator configured to calculate a rise rate of an internal resistance value with respect to a default value according to the voltage data of the battery cells, and a storage configured to store therein the rise rate of the internal resistance value with respect to the default value.

A storage battery device includes a plurality of cell modules including a plurality of battery cells, a data acquirer configured to acquire voltage data of the battery cells, a calculator configured to calculate a rise rate of an internal resistance value with respect to a default value according to the voltage data of the battery cells, and a storage configured to store therein the rise rate of the internal resistance value with respect to the default value.

There is provided a device or the like capable of improving the convenience of reproduction under various conditions of the characteristics of a secondary battery by using a simulated battery. Based on the communication between the electronics and/or the charger coupled to the electronics, and the simulated battery control device, the operation of the simulated battery mounted on the electronics is controlled, and the voltage corresponding to the current command value is applied to the specified load. Then, the operating characteristic information corresponding to the operating characteristic of the specified load corresponding to the applied voltage is output to the output interface of the electronics. The operating characteristics of the specified load can be grasped when voltage corresponding to the current command value is applied to the specified load of the electronics, and therefore the convenience of the user of the electronics can be improved.

There is provided a device or the like capable of improving the convenience of reproduction under various conditions of the characteristics of a secondary battery by using a simulated battery. Based on the communication between the electronics and/or the charger coupled to the electronics, and the simulated battery control device, the operation of the simulated battery mounted on the electronics is controlled, and the voltage corresponding to the current command value is applied to the specified load. Then, the operating characteristic information corresponding to the operating characteristic of the specified load corresponding to the applied voltage is output to the output interface of the electronics. The operating characteristics of the specified load can be grasped when voltage corresponding to the current command value is applied to the specified load of the electronics, and therefore the convenience of the user of the electronics can be improved.

A battery management device includes: a first switch state acquisition unit configured to acquire the state of an ignition switch; a determination unit configured to determine to perform correction control for correcting an error in the state of charge (SOC) of the battery when the ignition switch is operated from ON to OFF; a correction control unit configured to perform the correction control of the SOC of the battery when it is determined that the correction control is to be performed; and a second switch state acquisition unit configured to acquire the state of a cancel switch for canceling the execution of the correction control. When the ignition switch is operated from ON to OFF while the cancel switch is ON, the determination unit determines that the correction control is not to be performed.

A method for calculating a short-circuit current of a battery. includes: obtaining an integral state of charge and a current state of charge of the battery; calculating a first difference based on the integral state of charge and the current state of charge; calculating the short-circuit current of the battery based on the first difference; obtaining a first real state of charge and a second real state of charge; updating the first real state of charge and the second real state of charge based on a temperature-impedance table and the short-circuit current of the battery; calculating a second difference based on the updated first real state of charge and the updated second real state of charge; and updating the short-circuit current of the battery based on the second difference.

An object of the present invention is to provide a battery state estimation device capable of accurately estimating a deterioration state of an entire battery system in consideration of an SOH distribution of battery cells. The battery state estimation device according to the present invention estimates an SOH of a battery cell by using a correspondence between a time derivative of an output voltage during a pause period of the battery cell and a battery temperature, and estimates a deterioration state of an entire battery system by using the SOHs of a plurality of battery cells (see FIG. 1).