A system and a method of controlling a solar roof of a vehicle are provided. The system includes a solar cell panel and a controller that controls charging of a main battery and an auxiliary battery using power generated from the solar cell panel. A light amount sensor senses the amount of light collected in the solar cell panel and a temperature sensor measures a surface temperature of the solar cell panel.

The present disclosure provides systems and methods for flexible renewable energy power generation. The present disclosure also provides systems and methods for firming power generation from multiple renewable energy sources.

A method for estimating the state of health of an exchangeable rechargeable battery. The method includes: i. determining a remaining capacity of the battery during a charging operation, in such a manner, that a first charging value is ascertained by measuring an open-circuit voltage, as long as no charging current or only a minimal charging current is flowing; at least one further charging value is ascertained by measuring the charging current in specific time intervals, until the charging operation is completed; and a sum of the ascertained charging values is calculated; ii. determining a remaining performance of the battery during the charging operation in such a manner, that after a predefined battery voltage is reached, the charging current is briefly changed, and the respective battery voltage is measured; and an impedance of the battery is calculated from the quotient of the difference of the measured charging currents and battery voltages.

A battery system includes at least one battery including a plurality of cells and a hybrid control module configured to monitor a differential capacity of the at least one battery, determine when the monitored differential capacity of the at least one battery corresponds to a predetermined differential capacity of the at least one battery, and determine a state of charge of the battery in response to the determination that the monitored differential capacity corresponds to the predetermined differential capacity.

A battery including a first control circuit and a plurality of modules arranged in series between first and second terminals, each module including electric cells and switches coupling the cells to third and fourth terminals and a second switch control circuit. The battery includes a first data transmission bus coupling the first control circuit to each second control circuit and a second data transmission bus coupling the first control circuit to each second control circuit. The first control circuit is capable of transmitting first data to the second control circuits over the first bus at a first rate and is capable of transmitting second data to the second control circuits over the second bus at a second rate smaller than the first rate.

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 sheath with a raised portion with a second open end, a bottom portion, a power storage space in a body, a magnet component configured to receive a mobile phone wireless charging holder, a USB cable having a female connector with an operative end, at least a portion of the bottom portion is in communication with the body, at least a portion of the sheath extends above the body, the operative end of the female connector is retained in the second open end to provide the female connector of the USB cable in a firm and flat position with the operative end of the female connector being operable and above the surface of the body, an exit on the body is adjacent to the sheath for the cable going through, which connects the female connector in the sheath to the power storage space and the wireless charger connects to the operative end.

A sheath with a raised portion with a second open end, a bottom portion, a power storage space in a body, a magnet component configured to receive a mobile phone wireless charging holder, a USB cable having a female connector with an operative end, at least a portion of the bottom portion is in communication with the body, at least a portion of the sheath extends above the body, the operative end of the female connector is retained in the second open end to provide the female connector of the USB cable in a firm and flat position with the operative end of the female connector being operable and above the surface of the body, an exit on the body is adjacent to the sheath for the cable going through, which connects the female connector in the sheath to the power storage space and the wireless charger connects to the operative end.

A charging circuit includes a first charging path and a second charging path. The first charging path and the second charging path are connected in parallel, and the first charging path and the second charging path are both used to receive a charging signal via a wired charging interface. The first charging path is connected to a first power end of a battery, and the second charging path is connected to a second power end of the battery. The first end of the battery is different from the second end of the battery.

A method for charging a cell of an electric energy store includes setting the cell into a charging mode; determining a first and a second impedance characteristic, each representative of a complex alternating current impedance of the cell; determining a first and a second temperature characteristic on the basis of the impedance characteristics, each representative of a temperature of the cell; determining a deviation in the temperature characteristics; and reducing a charging current of the cell in the event that the deviation exceeds a specified temperature threshold value.