Magneti Marelli S.p.a.

Marelli Europe S.p.a.

Danilo Pritelli

Gianluca Aurilio

Rosanna Suglia

Franco Ciampolini

Giovanni Gaviani

Canio Caterini

Stefano Scolari

Alessandro Cerutti

Gianluca Aurelio

A method for estimating an operating current I dispensed by a battery pack or cell including the steps of acquiring characterization data of the battery pack or cell, related to measured time trends of a voltage Vm and of a characterization current Im of the battery pack or cell, associated with a respective characterization temperature value T; and then processing the characterization data to determine a plurality of parameters P of a model of the battery pack or cell, as a function of temperature and state of charge SOC. Measuring an operating voltage V of the battery pack or cell and an operating temperature T and for estimating the operating current I of the battery pack or cell. A plurality of time observation windows Wis identified and characterization voltage Vmvalues are detected. Then, at each observation window W, the following actions are performed: calculating a value of the state of charge SOCof the battery pack or cell; calculating an estimated voltage V, by means of the model of the battery pack or cell, as a function of respective nominal values of the parameters P; determining a respective error function Edependent on the difference between the estimated voltage Vand the characterization voltage Vmof the time observation window W; calculating an actual value Pfor each parameter P, by minimizing the aforesaid error function E.

Method for estimating the current and the state of charge of a battery pack or cell, without direct detection of current under operating conditions

An electric power system for a vehicle provided with a storage assembly comprising a first storage system with a number of electrochemical cells connected to one another in series and/or in parallel and a second storage system arranged in series to the first system and with a number of electrochemical cells connected to one another in series and/or in parallel; wherein the storage assembly is designed to supply power with a dual voltage; and wherein the electric power system comprises, furthermore, a DC/DC converter, which is designed to transfer the electric charge from the second storage system to the first storage system, and vice versa, and integrated in a BMS device for the management of said storage assembly, which is designed to carry out the balancing of the electrochemical cells of the second storage system and to estimate the state of charge and the state of health of the two storage systems.

Electric power system provided with a dual-voltage storage assembly for a vehicle

An electronic device including an electronic switch M, an electrical pre-charge circuit and a measurement, command and diagnosis module. The main electronic switch Mhas a first electrical terminal D, a second electrical terminal S, and a main driving terminal G. The main electronic switch Mis adapted to take, based on a driving signal DRV, depending on the command signal CMD and on an enabling signal ENB, a closed condition or an open condition, wherein the first electrical terminal Dis respectively connected to or disconnected from the second electrical terminal S. The pre-charge electrical circuit is adapted to carry out, based on the command signal CMD, a pre-charge operation, aimed at equalizing the electric potentials (V, V) of the first and second terminals of the device, before the main electronic switch Mtakes a closed condition, upon of a transition from the open condition.

Integrated electronic device with solid-state relay and pre-charge circuit

An electronic control device for controlling a vehicle battery pack comprises a non-programmable monitoring and actuation unit and a two-way serial communication interface. The non-programmable monitoring and actuation unit is electrically and operatively connectable to the battery pack and to each of the battery cells C to detect analog battery parameters P, including at least the magnitudes of battery voltage Vb and battery current Ib, in addition to temperature (Tc, Tcn), current (Ic, Icn) and voltage (Vc, Vcn) of each battery cell C. The non-programmable monitoring and actuation unit generates monitoring signals Sm representative of the detected analog battery parameters P. The two-way serial communication interface is connected to the non-programmable monitoring and actuation unit to receive the monitoring signals Sm and to supply the aforesaid at least one command signal Sc.

Electronic control device for controlling a vehicle battery pack and system employing such a device

An electronic device for the diagnosis of insulation loss of an energized electrical apparatus, with respect to a ground. The device includes a first resistance-switch group and a second resistance-switch group, connectable or disconnectable in a controlled manner, and also a first measurement circuit and a second measurement circuit, arranged in parallel to the first and second resistance-switch groups, respectively. The first and second measurement circuits include respective first and second detection circuits, first and second charge modulation circuits and first and second partition resistors (RB, RB). The first and second charge modulation circuits allow a dynamic 'switching' measurement technique. Moreover, a method is described for measuring the insulation resistances (RI, RI) of an energized electrical apparatus with respect to ground, in which the method is carried out by a device according to the invention. Finally, a self-diagnosis method of device is described.

Electronic device, system and method for insulation resistance measurements with functions of self-diagnosis and diagnosis of insulation loss with respect to ground of an energized electrical apparatus

A cooling circuit with cooling liquid for lithium-ion batteries comprising a battery pack comprising a plurality of cells electrically connected with each other, suitable for powering an electric machine for traction. The cells are perimetrically delimited by external walls. At least one bag contains cooling liquid associated in contact with the outer walls of the cells. The bag is made of deformable plastic material so as to be counter-shaped to the outer walls to adhere perimetrally to the outer walls and the circuit provides forced circulation of the cooling liquid through said at least one bag.

Cooling circuit with cooling fluid for lithium batteries, and a vehicle comprising said cooling circuit

An electronic device for controlling the electric charge of a load electrically supplied by a battery pack, comprising: a support; a control module integrated in the support; an electric pre-charging circuit of the load controlled by the control module; an electric active discharge circuit of the load controlled by the control module. The electric pre-charging circuit comprises at least one first solid-state switch and is integrated on the support. The electric active discharge circuit comprises at least one second solid-state switch and is integrated on the support. The first solid-state switch and the second solid-state switch work either as a switch or as a variable resistor.

Electronic device for controlling the electric charge of a load electrically supplied by a battery pack and system for moving an electric or hybrid traction vehicle using the device

The present invention relates to a solid-state relay including a power semiconductor switch device connected between a first electrical terminal and a second electrical terminal and having a command terminal. An electronic driving block is adapted to generate a command signal applied to the command terminal to switch the at least one semiconductor switch device from a closed/open state to an open/closed state to disconnect/connect the first electrical circuit portion from/to the second portion of the electrical circuit. An electronic block detects a current which crosses the power semiconductor switch device. The electronic detection block includes a first electronic device adapted to generate a first signal indicative of a difference of potential between the first and second terminals generated by the current which crosses a total resistance present between the first and second terminals of the power semiconductor switch device in the closed state. The total resistance comprises the sum of a first resistance associated with the semiconductor switch device in the closed state and of second bonding resistances associated with an electrical connection between one of the conductive terminals and the respective either first or second electrical terminal.

Growing community of inventors

Bologna, Italy

Danilo Pritelli