A vehicle includes: an electric device mounted on the vehicle; a functional component placed on the electric device to extend further rearward than the electric device in plan view when mounted on the vehicle; a cable connecting the electric device and a battery mounted on the vehicle; and a cable mount that is provided below and within a plane of projection of the functional component on the electric device and has a terminal port facing downward in a vertical direction when mounted in the vehicle. The vehicle reduces the risk of a human touching an electric terminal, improving safety.

Disclosed herein are systems and methods for overvoltage protection. A system, such as a vehicle, for overvoltage protection of a supercapacitor system for an electric vehicle, the system includes a plurality of supercapacitor groups, each supercapacitor group comprising two or more of the plurality of supercapacitors. The system includes a plurality of overvoltage protector units, each the plurality of overvoltage protector units operable to detect the voltage of each of the two or more supercapacitors within the respective one of the supercapacitor groups. The system includes a controller comprising a processor with access to a memory, wherein the control system is operable to determine which of the plurality of supercapacitor groups to connect to the electric vehicle based on data sent from the respective overvoltage protector units.

A system and method of capacitance management in an agricultural vehicle and connected implement, wherein the vehicle and implement have a plurality of electric drives connected to a common connection and connectable to a direct current supply, and each electric drive has an associated Y capacitor between each direct current supply connection and the common connection, wherein the method includes receiving and summing capacitance values for each of the electric drives and comparing with a stored threshold value. If the threshold value is exceeded, a sequence of selective disconnections of individual electric drives is performed until the sum of the received capacitance values is less than or equal to the threshold value. The method may be performed manually, or automatically based on a sequence defined in a priority list until the sum of the received capacitance values is less than or equal to the threshold value.

A European standard-based double-gun high-power quick charging system and method are disclosed. The system includes a battery management system, and at least two paths composed of corresponding charging communication modules, chargers and high-voltage charging loops, each of the chargers connected to at least one charging gun; the battery management system independently controls the charging communication module and high-voltage charging loop, and performs mapping management on a control signal and high-voltage charging loop; information interaction between different charging control units and chargers is carried out independently. By designing the system compatibility and time sequence difference when a double-gun system is connected, the problem of idle chargers is solved, so that the charging speed is increased, and the problems of long-time occupation of charging resources by vehicles and low utilization efficiency of vehicles are avoided; insulation detection performed on the initial charging of vehicle battery system increases safety of the system.

First voltage an output unit generates a cyclic voltage that changes cyclically, and applies the cyclic voltage to the other end of a coupling capacitor via a first resistance. A second resistance and a third resistance are connected in series between a node and a second voltage output unit, the node being between the coupling capacitor and the first resistance. A voltage measurement unit measures a voltage at a voltage dividing point between the second resistance and the third resistance. In a period in which two types of fixed voltages are applied to the voltage dividing point in order, a diagnosing unit determines whether a leakage detecting device is in a normal state, based on the voltage measured by the voltage measurement unit.

A method for reactivation of an electrical system of a vehicle comprising a first electrical system operating at a first lower voltage and a second electrical system operating at a second higher voltage, comprising: detecting a fault or a crash situation in the second electrical system; disconnecting a power source of the second electrical system; determining the fault of the second electrical system is no longer present or that the crash situation is resolved; reconnecting the power source to the second electrical system and increasing the voltage of the second electrical system from zero to an intermediate voltage lower than the second voltage; and if a detected current in the second electrical system is higher than a current threshold value; or if a detected voltage of the first electrical system is higher than a voltage threshold value; reducing the voltage of the second electrical system to zero.

In order to quickly and accurately diagnose the failure of a coupling capacitor of an earth leakage detection device, voltage output unit (11a, OP1) generates a periodically changing periodic voltage and applies the periodic voltage to the other end of coupling capacitor (Cc) via first resistor (R1). Second resistor (R2) and third resistor (R3) are connected in series between a connection point between coupling capacitor (Cc) and first resistor (R1), and a predetermined fixed potential. Voltage measurement unit (11b) measures a voltage at a voltage dividing point between second resistor (R2) and third resistor (R3). Diagnosis unit (11d) determines whether or not coupling capacitor (Cc) is normal based on a voltage measured when switch (MRp, MRm, MRpp) is turned on in a state where voltage output unit (11a, OP1) outputs a fixed voltage.

This disclosure relates to an electrified vehicle configured to disconnect a battery from a load, and a corresponding method. An example electrified vehicle includes an array of battery cells and an electrical conductor connecting the array to a load. A disconnect is arranged along the electrical conductor. Further, the electrified vehicle includes an electronic circuit with a switch and an igniter. When a voltage drop across the electrical conductor exceeds a threshold, the switch is configured to permit current to flow from at least one of the battery cells through the igniter to trigger the disconnect thereby disconnecting the array of battery cells from the load.

A vehicle electrical system is equipped with a DC charging connection, a rechargeable battery, a first DC-DC converter and an electrical drive. The first DC-DC converter has a first side. This is connected to a connecting point via a first switch. The first DC-DC converter has a second side to which the electrical drive is connected. The second side is connected to the rechargeable battery via a second switch and via a connecting point or is connected to the rechargeable battery directly. The vehicle electrical system has a second DC-DC converter. This is connected to one side of the first switch.

A supply device for supplying electricity to at least one consumer includes: a primary power supply in which there is a first fuel cell device having a first performance; a voltage transformer which connects the primary power supply to a secondary power supply having a battery; and a measuring device for detecting an insulation resistance of the primary power supply and/or of the secondary power supply. A second fuel cell device having a second performance is connected in series with the first fuel cell device in the primary power supply, wherein a bridge circuit comprising a switch is connected in parallel with each of the fuel cell devices and wherein the switches of the bridge circuits can be switched in accordance with the detected insulation resistance. A fuel cell vehicle and a method for limiting voltage in a supply device are also provided.