An on-vehicle backup control device includes a plurality of chargers each of which supplies a charging current based on power supplied from a first power source unit, and an adjustment unit that controls the plurality of chargers. Each of the chargers performs an operation for supplying a charging current to a corresponding power storage. The adjustment unit adjusts the charging operations of the plurality of chargers so as to keep a sum of charging currents to the plurality of power storages within an acceptable range.

The object of the present invention is to achieve redundancy of a power supply function by a simple configuration, to ensure operational continuity in case of failure. A power grid (1) comprises: a first power supply path (20-1) that is connected to a main engine-driving power source (100-0) of a vehicle via a power conversion device (101) and to loads (40-1, 41, 42-1) ; and a second power supply path (20-2) that is connected to a power source (100-2) different from the main engine-driving power source (100-0), to loads (40-2, 41, 42-2), and to the first power supply path (20-1) via a switch SW0. The switch SW0 is closed when the first power supply path (20-1) and the second power supply path (20-2) are normal, and is opened when the first power supply path (20-1) or the second power supply path (20-2) is abnormal.

Systems and methods are disclosed herein for determining the remaining useful life of a battery cell that includes the battery cell's internal resistance and/or shock loading. In one example implementation, the systems and methods disclosed herein monitor acceleration information over time based on information received from an accelerometer integrated in a battery cell and electrical information for at least one electrical parameter of the battery cell over time. The information is stored for determining remaining useful life. In another example implementation, the systems and methods disclosed herein determine a voltage drop across the battery cell and a current output of the battery cell. The systems and methods determine an internal cell resistance of the battery cell based on charge or discharge voltage and current information.

A method for an electric vehicle (EV) charging system having a first EV charging port and a second EV charging port in which a first EV attached to the first EV charging port has a single phase charging system and a second EV attached to the second EV charging port has a multi-phase charging system, the method comprising determining a first charge current limit to be applied by the first charge port to the single phase charging system of the first EV and a second charge current limit to be applied by the second charge port to each phase of the multi-phase charge system of the second EV to allow the first EV to be charged with a first power value and the second EV to be charged with a second power value, wherein the first power value and the second power value have a predetermined relationship.

An electrical line selection system comprising a circuit module configured to connect energy sources with multiple line outputs. The circuit module has a number of inputs configured to connect to energy sources, including rechargeable battery systems, and a number of outputs configured to connect with other electrical systems such as other battery systems, loads, charging sources, and various AC or DC power supplies. A switching circuit is contained by the circuit module and a controller manages the switching circuit based on desired connections and strategies for managing power supplies and current sinks.

There is fear that some battery cells among battery cells which are serially connected may consume electric power all the time, thereby causing expansion of unbalance in voltage of the battery cells and hindering electric discharge of a battery system. When a second battery has a sufficient voltage, an electric current control board supplies operating power to a battery control unit and a relay via an external minus line and an external plus line. On the other hand, when the voltage of the second battery has decreased, the electric current control board supplies the operating power from a first battery to the battery control unit and the relay via an internal minus line and an internal plus line. A first electric current control unit and a second electric current control unit control the supply of the operating power according to, for example, the decrease in voltage of the second battery.

Electrical system of a road vehicle comprising a high-voltage electric circuit provided with a first power storage system and a low-voltage electric circuit provided with a second power storage system and with a plurality of electrical loads; an electronic DC-DC power management and conversion system, which connects the low-voltage electric circuit and the high-voltage electric circuit to each other so as to selectively transfer electrical energy from the high-voltage electric circuit to the low-voltage electric circuit and/or vice versa; the electronic system comprises a control unit configured to detect a malfunction of the first storage system and/or of the second storage system and/or of at least one of the electrical loads and to control, depending on the malfunction, a conversion device and a distribution unit in order to ensure the supply of power to at least some priority loads among the electrical loads.

A power supply circuit for stably supplying power to loads of a vehicle comprises a battery pack, a switch circuit, a first control circuit, a detection circuit, and a second control circuit. The first control circuit is configured to output a first control signal to turn on the switch circuit and the battery pack can supply power to the loads when the vehicle is in a first state. The detection circuit is configured to detect whether the first control circuit normally outputs the first control signal during the first state and output a trigger signal to the second control circuit in response to the first control circuit does not output the first control signal. The second control circuit outputs a second control signal according to the trigger signal to control the switch circuit to be turned on. A power supply method and the vehicle are also disclosed.

In a management device that manages a parallel system for power storage where a plurality of series-connected cell groups are connected in parallel, controller (16) derives deviations of currents flowing through the plurality of series-connected cell groups, and calculates an upper limit value of a charging current or charging power of the whole parallel system or an upper limit value of a discharging current or discharging power of the whole parallel system based on the derived current deviations. Controller (16) adjusts the upper limit value by multiplying the upper limit value by a coefficient (01) in accordance with a condition at a time of deriving the current deviations.

A wireless power transfer system 1 includes a power transmission device 2 and a power reception device 3. The power transmission device 2 is a power transmission device 2 installed in a road 4, is provided with a power transmission coil 21 that transmits power wirelessly, and is configured such that when installed in the road 4, the normal line of a coil plane of the power transmission coil 21 is inclined with respect to the normal line of the road surface of the road 4 in a lateral cross section of the road 4. The power reception device 3 is provided with a power reception coil 31 that receives power wirelessly, and at least a portion of the power reception coil 31 is housed in the wheel 6 of the moving body 5.