Abstract: A method for estimating state of health (SOH) of an electric battery includes starting a charging of an electric battery with a charge current, measuring a voltage of the electric battery during the charging, determining a first point in time at which a minimum slope of the voltage curve during the charging occurs, determining a second point in time when the measured voltage of the electric battery equals a maximum charging voltage, determining a SOH-interval between the first point in time and the second point in time, estimating the state of health for the electric battery based on the SOH-interval. The advantage of the method is that an estimated value for the state of health of an electric battery is obtained in an easy and reliable way.

Abstract: The present invention relates to a battery arrangement for an electrically powered industrial vehicle. The battery arrangement comprises a battery and ancillary equipment arranged to connect the battery to the vehicle. The battery is removably connected to the vehicle and comprises a current sensor. The battery is in a first state (A) when a measured current out from the battery exceeds a predetermined first current level. In the first state (A) the battery is prevented from turning power off to the vehicle. The battery is in a second state (B) when a measured current out from the battery is below a predetermined first current level for a predetermined first period of time. In the second state (B) the battery is allowed to turn power off to the vehicle.

Abstract: A battery pack includes a plurality of battery cells, wherein each of the battery cells is provided with first and second terminals connected to first and second cell electrodes, respectively; a first conductor electrically connecting at least a first and a second battery cell via one of the terminals of each of the first and second battery cells; and an electric heating element arranged to allow heating of at least the first and second battery cells via heating of the first or second terminal thereof. The battery pack includes at least a first metal plate capable of conducting both electric current and heat, wherein the first metal plate forms the first conductor and wherein the electric heating element is arranged onto the first metal plate so as to allow heating of at least the first and second battery cells via the first metal plate and further via the terminals connected to the first metal plate.

Abstract: A method for estimating state of health (SOH) of an electric battery includes starting a charging of an electric battery with a charge current, measuring a voltage of the electric battery during the charging, determining a first point in time at which a minimum slope of the voltage curve during the charging occurs, determining a second point in time when the measured voltage of the electric battery equals a maximum charging voltage, determining a SOH-interval between the first point in time and the second point in time, estimating the state of health for the electric battery based on the SOH-interval. The advantage of the method is that an estimated value for the state of health of an electric battery is obtained in an easy and reliable way.

Abstract: In a method of determining whether a battery system arranged onto a vehicle is connected to an external battery charging unit, the battery system includes a plurality of battery cells, first and second main terminals connected to the battery cells, and a charging interface including first and second contact points connected to corresponding first and second main terminals. The charging unit includes third and fourth contact points configured to be connected to the first and second contact points during charging of the battery system. The method includes disconnecting, by means of a switch, the first main terminal from the corresponding first contact point; measuring a voltage between the first contact point and a reference point having a potential substantially similar to the disconnected first main terminal; and determining, by comparing a value from the voltage measurement to a threshold value, whether the charging unit is connected to the battery system.

Abstract: A battery system and a method of determining whether a battery system arranged onto a vehicle is connected to an external battery charging unit, are disclosed.

Abstract: A battery pack includes a plurality of battery cells, wherein each of the battery cells is provided with first and second terminals connected to first and second cell electrodes, respectively; a first conductor electrically connecting at least a first and a second battery cell via one of the terminals of each of the first and second battery cells; and an electric heating element arranged to allow heating of at least the first and second battery cells via heating of the first or second terminal thereof. The battery pack includes at least a first metal plate capable of conducting both electric current and heat, wherein the first metal plate forms the first conductor and wherein the electric heating element is arranged onto the first metal plate so as to allow heating of at least the first and second battery cells via the first metal plate and further via the terminals connected to the first metal plate.

Abstract: A system and method for efficient charging of distributed batteries each connected to a power supply grid via a low-frequency switch of a switching battery controller communicating with a control center adapted to provide a switching schedule for the low-frequency switch of the respective switching battery controller on the basis of power absorption predictions calculated by said control center for the switching battery controllers in response to power measurements reported by the switching battery controllers and on the basis of power absorption schedules and/or power generation schedules of energy resources of said power supply grid.

Abstract: An energy management system of a power supply grid includes at least one control unit (CU) connected to distributed energy resource controllers (ERC) of energy resources (ER) of the power supply grid by means of a communication network, (CNW) wherein the control unit (CU) monitors communication links (CL) between the control unit (CU) and the energy resource controllers (ERC) via the communication network (CNW), and wherein the control unit (CU) is adapted to calculate a predicted operation behavior of an energy resource (ER) controlled by an energy resource controller (ERC) if a loss of communication or a communication bandwidth limitation of the monitored communication link to the energy resource controller (ERC) is detected.

Abstract: A charging system (C-SYS) for charging at least one energy storage device (ESD) of a power grid (PG) according to a response curve (RC) indicating a power supplied by said energy storage device (ESD) to said power grid (PG) or absorbed by said energy storage device (ESD) from said power grid (PG) depending on at least one grid parameter of said power grid (PG), wherein in a dead band (DB) around a target value of said grid parameter a selected response curve (RC) is applied.

Abstract: The invention concerns a battery pack (1), comprising a plurality of electrically connected battery cells (2), wherein the battery cells (2) are substantially flat with two opposite sides (2a, 2b) and a peripheral edge (2c), and wherein the battery cells (2) are arranged side by side as to form a layered structure, and an electronic arrangement configured to monitor and control the battery cells (2). The invention is characterized in that the electronic arrangement comprises a plurality of individual electronic circuit units (30), each of which being associated with a corresponding battery cell (2), wherein each of the electronic circuit units (30) is configured to be capable of monitoring and controlling its corresponding battery cell (2), and wherein each electronic circuit unit (30) is arranged on a thin and flexible circuit carrying sheet (3) that is arranged at one of the sides (2a, 2b) of the corresponding battery cell (2). The invention also concerns a method for manufacturing of a battery pack (1).