Abstract:
An electronic device including an electronic switch M1, an electrical pre-charge circuit and a measurement, command and diagnosis module. The main electronic switch M1 has a first electrical terminal D1, a second electrical terminal S1, and a main driving terminal G1. The main electronic switch M1 is 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 D1 is respectively connected to or disconnected from the second electrical terminal S1. 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 (V1, V2) of the first and second terminals of the device, before the main electronic switch M1 takes a closed condition, upon of a transition from the open condition.
Abstract:
An electronic control device 1 for controlling a vehicle battery pack 50 is described.The device 1 may be used to control a vehicle battery pack 50 adapted to supply a battery voltage Vb and a battery current Ib through a plurality of battery cells C. The device 1 is adapted to interact with a remote control unit 60 external to the battery pack 50. The device 1 comprises a non-programmable monitoring and actuation unit 2 and a two-way serial communication interface 3. The non-programmable monitoring and actuation unit 2 is electrically and operatively connectable to the battery pack 50 and to each of the battery cells C to detect analogue battery parameters P, comprising at least the magnitudes of battery voltage Vb and battery current Ib, in addition to temperature (Tc1, Tcn), current (Ic1, Icn) and voltage (Vc1, Vcn) of each battery cell C.The non-programmable monitoring and actuation unit 2 is further configured to generate monitoring signals Sm representative of the detected analog battery parameters P, to receive at least one command signal Sc representative of at least one respective operation command CM of the battery pack 50, and to activate such at least one command CM.The two-way serial communication interface 3 is connected to the non-programmable monitoring and actuation unit 2 to receive the aforesaid monitoring signals Sm and to supply the aforesaid at least one command signal Sc.The two-way serial communication interface 3 is further connectable to an external two-way serial communication line LS to send the monitoring signals Sm to the remote control unit 60 and to receive the at least one command signal Sc from the remote control unit, through the aforesaid two-way serial communication line LS.
Abstract:
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 Tk; 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 Wi is identified and characterization voltage Vmi values are detected. Then, at each observation window Wi, the following actions are performed: calculating a value of the state of charge SOCi of the battery pack or cell; calculating an estimated voltage VABi, 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 Ei dependent on the difference between the estimated voltage VABi and the characterization voltage Vmi of the time observation window Wi; calculating an actual value Pi for each parameter P, by minimizing the aforesaid error function Ei.
Abstract:
A vehicle step apparatus including an extending and retracting device having a mounting bracket, a step bracket, and an arm assembly. A gear box has a cavity into which at least a portion of a motor shaft of a motor is inserted. A worm wheel is rotatably disposed in the cavity and has a worm wheel body meshing with the motor shaft. An output shaft is mounted to the worm wheel body. A sun gear is fitted over the output shaft. A planet carrier is rotatably disposed in the cavity and connected with the arm assembly. A planet gear is rotatably mounted to the planet carrier and meshes with the sun gear. An adjusting member is mounted in the gear box, and is movable in an axial direction of the motor shaft and abuts against a free end of the motor shaft.
Abstract:
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 can be configured to work either as a switch or as a variable resistor.