A method for predicting an electric load imparted on each battery unit in an electric energy storage system comprising at least two battery units electrically connected in parallel to each other. The method comprises establishing a battery parameter set, the battery parameter set comprising at least the following values for each battery unit in the electric energy storage system: an internal ohmic resistance value indicative of the internal ohmic resistance of the battery unit and an open circuit voltage value indicative of the open circuit voltage of the battery unit, using an electric load level indicative of a total electric energy storage system load, and using the electric load level and the battery parameter set for predicting the imparted load on each battery unit in the electric energy storage system.

A battery management device manages a battery including a plurality of battery cells in which a change in OCV relative to a change in SOC is smaller in a first SOC range than in a second SOC range. The battery management device is configured to: accumulate a current flowing in each battery cell to calculate the SOC of the battery cell; when the calculated SOC has stayed in the first SOC range for a predetermined period or more, control the cell balancing circuits in such a way that the SOC of a target battery cell selected from the battery cell s falls within the second SOC range; and calculate the SOC of the target battery cell based on the relationship between the SOC and the OCV in the second SOC range and correct the SOC of each battery cell by the amount of correction obtained based on the calculated SOC.

A battery management device manages a battery including a plurality of battery cells in which a change in OCV relative to a change in SOC is smaller in a first SOC range than in a second SOC range. The battery management device is configured to: accumulate a current flowing in each battery cell to calculate the SOC of the battery cell; when the calculated SOC has stayed in the first SOC range for a predetermined period or more, control the cell balancing circuits in such a way that the SOC of a target battery cell selected from the battery cell s falls within the second SOC range; and calculate the SOC of the target battery cell based on the relationship between the SOC and the OCV in the second SOC range and correct the SOC of each battery cell by the amount of correction obtained based on the calculated SOC.

Disclosed herein are battery management systems (BMS) for controlling the operating state of a battery pack device, as well as methods for changing the operating state of a battery pack device. The battery pack may have multiple cells therein, each cell capable of generating multiple different voltages to allow more energy (voltage×current) to be quickly and efficiently put into the battery, thus optimizing battery charging (i.e., reducing battery charging times). These battery packs may change from operating in series, to operating in parallel, when desired, while utilizing affordable relays and more affordable electrical components. These battery packs may be comprised of any number of cells and can controlled and/or operated by the BMS, for optimal battery charging, or for optimal discharging, as desired. The BMS may be any type of control logic and/or software, operable to control and/or operate the battery packs.

Disclosed herein are battery management systems (BMS) for controlling the operating state of a battery pack device, as well as methods for changing the operating state of a battery pack device. The battery pack may have multiple cells therein, each cell capable of generating multiple different voltages to allow more energy (voltage×current) to be quickly and efficiently put into the battery, thus optimizing battery charging (i.e., reducing battery charging times). These battery packs may change from operating in series, to operating in parallel, when desired, while utilizing affordable relays and more affordable electrical components. These battery packs may be comprised of any number of cells and can controlled and/or operated by the BMS, for optimal battery charging, or for optimal discharging, as desired. The BMS may be any type of control logic and/or software, operable to control and/or operate the battery packs.

Systems and methods for a scalable battery controller are disclosed. In one example, a circuit board coupled to a battery cell stack is designed to be configurable to monitor and balance battery cells of battery cell stacks that may vary depending on battery pack requirements. Further, the battery pack control module may configure software instructions in response to a voltage at a battery cell stack.

A voltage measuring apparatus is configured to measure voltages of respective battery cells of a battery cell array including a plurality of battery cell groups each including a predetermined number of battery cells connected in series. The voltage measuring apparatus includes a plurality of measuring units each provided for each of the battery cell groups. The adjacent measuring units are connected through a communication channel so as to perform current communication therebetween. A bidirectional diode circuit element is connected to the communication channel extending between the adjacent measuring units.

A battery with at least two battery cells, which are connected by at least one electric connection element to one another, and a superordinate control device. Each of the battery cells is provided with at least one galvanic element, a battery cell housing for accommodating the galvanic element, at least one sensor device for detecting a physical and/or chemical feature of the battery cell, and a communication device for communicating with the superordinate device. The superordinate device is adapted to control an energy flow in at least one of the battery cells and/or from at least one of the battery cells as a function of the physical and/or chemical features of the battery cell. The invention further also relates to a motor vehicle with such a battery.

A battery management system and method that allows a battery bank to be composed of battery modules that can be heterogeneous with respect to each other. A battery bank composed of modules that support the battery management system allows for any subset of modules to be easily replaced with modules of different electrochemical characteristics. Each of the modules may also have a controller that manages cells of the module. The bank level controller and module level controller may operate to virtualize the hardware under their management to reduce or eliminate the heterogeneous features of the underlying cells and modules.

Connection and control concepts for battery packs in a high voltage battery assembly are provided. Parallel, modular configurations permit improved safety, voltage balancing, and redundancy, improving operation and reliability of an associated high voltage electrical vehicle such as a heavy-duty truck.