47results about "Battery overcurrent protection" patented technology

A multi-level inverter using cascaded H-bridge modules, where each module can balance its at least two charge storage elements by means of voltage equalization. Modules are arranged in series into at least one cascade inverter phase with optional center taps, and modules communicate with a control unit by being addressed over at least one serial communication bus. Additional features that can be included in embodiments are the configuration of modules to react to multiple specific addresses in order to increase the maximum output voltage slew rate, metal circuit breaking springs to provide fusing within modules, and the ability to interconnect multiple physically distinct inverters into a single unit. This inverter is predominantly intended for electric vehicle applications, and the optional incorporation of a switching array allows the possibility for power transfer to or from a wide range of voltage sources including other inverters.

A power supply system with a large number of battery modules, wherein each battery module has a first electrical connection and a second electrical connection, via which the battery modules are connected in series in an interconnection branch of the power supply system. Each battery module also has an accumulator which can be connected via a bridge circuit of the battery module to the first electrical connection and the second electrical connection, and to a charging path via which the power supply system can be charged, and to a discharging path via which the power supply system can deliver electrical power to a connected consumer. The power supply system has a switching component to which the charging path, the discharging path and the interconnection branch are connected, and wherein the switching component can connect the charging path and / or the discharging path electrically conductively to the interconnection branch.

A battery control device includes: a first battery control unit configured to control an electrical connection between an external load and a first battery module, the first battery control unit including: a first switch connected between a positive terminal for the first battery module and the external load; a second switch connected between a negative terminal for the first battery module and the external load; and a first controller configured to control an open / closed state of the first and second switches. The first controller may be configured to detect a short-circuit between the external load and the first battery control unit, according to a voltage between both ends of the first switch detected with the first switch open and the second switch closed.

1. A method for protecting an on-board charging device, comprising: detecting phase and neutral voltages from a grid; detecting a current signal representative of a compensation current generated by a compensation circuit; combining the phase voltages to obtain a homopolar voltage signal; squaring the current signal and the homopolar voltage signal to obtain a first rectangular current wave and a second rectangular voltage wave; combining the first and second square waves to generate an output signal having a first logic level when the first and second square waves are in phase and a second logic level when the first and second square waves are not in phase; generating a voltage that increases in proportion to a duration of each section of the output signal having a first value; comparing a value of the voltage with a limit value; and generating an alarm signal if the value of the voltage exceeds the limit value.

The disclosure provides a charging control method and a charging control apparatus for a battery management system. The control method includes: selecting, based on a charging state of the BMS, to enter a corresponding charging mode. The charging mode includes a high-current charging mode, a float charging mode, a stop charging mode, and a protection charging mode. During an initial set time after the BMS starts operating, the BMS operates in the protection charging mode. In the protection charging mode, a battery is charged within a protection charging current threshold. After the initial set time ends, one of the protection charging mode, the high-current charging mode, the float charging mode, and the stop charging mode is selected for entry based on the charging state of the BMS. The disclosure resolves a problem of damage to a plurality of BMSs with different voltages or capacities caused by a relatively high circulating current generated when the BMSs are connected in parallel.

A method for overcurrent detection in a battery, a battery management system, and a battery are provided. A present detection current is determined based on a pre-set detection current determination strategy, which can ensure the accuracy of the present detection current. Secondly, the current threshold is determined according to the charge / discharge state and the current temperature of the battery, that is, the influence of the charge / discharge state and the current temperature on the current threshold is taken into account, which enables the current threshold to match the charge / discharge state and the current temperature and to be more refined. Finally, when comparing the present detection current with the current threshold, if the present detection current exceeds the current threshold to satisfy the preset condition, it is determined that an overcurrent fault occurs in the battery, which makes the detection result accurate.

A semiconductor device, including: a lower phase switching element connected in series with an upper phase switching element; a lower phase power supply which outputs a lower phase side driving voltage; a lower phase drive control circuit which receives the lower phase side driving voltage and drives and controls the lower phase switching element; a bootstrap circuit which receives a charging current from the lower phase power supply, responsive to the lower phase switching element being turned on, and generates a charging voltage therefrom; and an upper phase drive control circuit which receives the charging voltage as an upper phase side driving voltage, which includes a charging current limiting circuit for limiting the charging current flowing from the lower phase power supply to the bootstrap circuit according to a voltage level of the charging voltage, and which drives and controls the upper phase switching element.

The present disclosure relates to a redundant power device, and an object of the present disclosure is to provide a redundant power topology that can ensure normal operation of a battery management system (BMS) by securing normal operating power of the BMS even when a disconnection occurs in a cable connecting a battery cell and the BMS or an abnormality or failure occurs in an uppermost battery cell. The present disclosure provides a configuration of switching a power supply cable to a processor so that power is supplied to the processor through a sub-cable when an abnormality occurs in a main cable.

A method compensates for leakage currents in a protective conductor of an electrical power converter. The method includes: using a first differential current sensor for determining a differential current depending on a phase conductor current in a phase conductor and a neutral conductor current in a neutral conductor; feeding a compensation current into the phase conductor and / or into the neutral conductor via a first compensation circuit; using a second differential current sensor for capturing a signal representing remaining residual leakage current; converting the signal representing the residual leakage current to a frequency domain; generating a compensation signal for the residual leakage current in a frequency-selective manner; converting the compensation signal to a time domain; supplying the converted compensation signal converted to the first compensation circuit or a second compensation circuit; and feeding a residual compensation current corresponding to the compensation signal into the phase conductor(s) and / or into the neutral conductor.

A tool assembly, an electric tool, a battery pack and a method for adjusting power of the tool assembly are provided. A tool assembly includes a battery pack, an electric tool and an identification system. The identification system is disposed in the battery pack and / or the electric tool, and the identification system is configured for matching an output power of the battery pack with a power supply power required by the electric tool after the electric tool is plugged into the battery pack. Alternatively, the identification system is disposed in the battery pack and the electric tool, and the identification system is configured for identifiably assembling a battery pack having an output power with an electric tool having a power supply power matching with the output power of the battery pack.

To make it possible to reduce a circulating current caused by an abnormality in a current sensor when performing external charging using a neutral point charging method.SOLUTION: A vehicle power supply apparatus includes a power conversion device that includes a switching element and a current sensor for each phase of an electric motor for driving. A control device controls the power conversion device so that power supplied from an external power supply via a neutral point of the electric motor is boosted and then supplied to a battery during battery charging. The control device performs feedback control to control the current in each phase of the electric motor by controlling the switching element so that an input current from the external power supply and an output current to the battery are equal during charging. The control device sets the upper limit of the current in each phase on the basis of the maximum value of the input current during charging and limits the current in each phase, which is controlled by the feedback control so that the set upper limit is not exceeded.SELECTED DRAWING: Figure 3

A vehicle battery monitoring system includes a drive unit including an electric motor to rotate wheels of a vehicle, at least one battery module configured to supply power to the electric motor, the at least one battery module including a cathode, an anode, and a separator between the anode and the cathode, a memory configured to store a cathode equivalent circuit model, an anode equivalent circuit model and a separator equivalent circuit model, and a vehicle control module configured to determine a cathode voltage response of the cathode using the cathode equivalent circuit model, determine an anode voltage response of the anode using the anode equivalent circuit model, determine a separator voltage response of the separator using the separator equivalent circuit model, and modify a charging current supplied to the at least one battery module based on the cathode voltage response, the anode voltage response, and the separator voltage response.

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 present disclosure relates to systems, methods, and devices for controlling charging of vehicles, to avoid charging during charge-adverse time periods or during charge restriction events. This can advantageously reduce cost to vehicles owners, and or provide access to reward incentives. Further, power distribution entities (utility providers) advantageously have increased control over power distribution to avoid over-burdening of power distribution infrastructure. Further, systems and methods for determining or inferring whether a vehicle is connected to a charge station are described, which can be used to inform automatic restriction of vehicle charging.

A battery is electrically coupled to a bidirectional power converter (i) to output discharge current through a first electrical path between battery cells and the bidirectional power converter, and (ii) to receive charging current through the first electrical path from the bidirectional power converter. A battery management system is configured to monitor the battery cells, detect a fault condition of the battery cells, transmit a first control signal to the bidirectional power converter to control the bidirectional power converter to cease operating in response to detecting the fault condition of the one or more battery cells, and transmit a second control signal to a switching element to close the switching element to cause a short circuit between a positive side and a negative side of the battery to cause a first overcurrent protection device to open to prevent current from flowing into or out of the battery cells.

An automobile charger, a charging method and a medium are provided. The charger includes a MCU, a switching power supply circuit, a first and second charging circuits, a battery voltage detection circuit, a charging current detection circuit, a constant-current driving control circuit, a constant-voltage driving control circuit and a switch driving control circuit. The charger is provided with the first and second charging circuits, which can realize three charging modes on the battery. The real-time voltage signal and the real-time current signal are collected with the battery voltage detection circuit and the charging current detection circuit, and through feedback of the real-time voltage signal and the real-time current signal, the MCU is configured to output PWM signals with different duty ratios to the constant-current driving control circuit and the constant-voltage driving control circuit, so as to realize output of different voltage values and current values of the switching power supply.

An energy storage valve submodule, an energy storage valve, and an energy storage station are provided, pertaining to the field of power electronics technologies. The energy storage valve submodule includes an energy storage module and a load; where the load is electrically connected to the energy storage module; and the load is further electrically connected to another energy storage valve submodule.

A power supply system includes a power supply supplying power to a load via a first wiring, a storage battery storing power supplied from the power supply via a second wiring connected to the first wiring and supplying power to the load when the power supply fails to supply power to the load, a first switch provided on the first wiring between a connection portion with the second wiring and the power supply, a voltage conversion unit connecting the second wiring and the storage battery and stepping up and down a voltage of power supplied from the power supply, a second switch connected in parallel with the second wiring and the voltage conversion unit, a first fuse provided at an output unit of the voltage conversion unit and cutting off a current by being blown when a ground fault current flows thereinto.

A charging apparatus includes a sampling module, a control module, a clamping module, and a switched capacitor module. The sampling module is configured to connect to a battery, collect current status information of the battery, and provide collected status information for the control module; the control module is configured to adjust output energy of the clamping module based on the status information, and provide a drive signal for the switched capacitor module, the clamping module is configured to connect to a power supply, receive power supply energy provided by the power supply, process the power supply energy into output energy, and provide the output energy for the switched capacitor module, and the switched capacitor module is configured to provide charging energy for the battery based on the drive signal provided by the control module and the output energy provided by the clamping module.

A battery charging / discharging control system and an electronic device, which relate to the technical field of battery charging / discharging. The control system includes: a positive power supply terminal, a negative power supply terminal, a positive battery terminal, a negative battery terminal, a charging / discharging circuit, and a controllable switching circuit. The charging / discharging circuit includes a first sample resistance circuit and a battery protection chip. One end of the first sample resistance circuit is connected to the negative power supply terminal, and there is a first node between the end of the first sample resistance circuit and the negative power supply terminal; and the other end of the first sample resistance circuit is connected to the negative battery terminal. The battery protection chip comprises an overcurrent detection pin, the overcurrent detection pin is connected to the first node.

A current interruption circuit includes a first switch and a second switch provided on both sides of a first resistor, which is enclosed within an ignition fuse and is burned out due to heat upon ignition, the first resistor being energized when both switches are turned on, a first current sensor and a second current sensor configured to detect a current in a current path in which the ignition fuse is provided, a first overcurrent determination circuit configured to determine an overcurrent based on an output of the first current sensor, and a second overcurrent determination circuit configured to determine an overcurrent based on an output of the second current sensor. The first switch is turned on based on a determination result of the first overcurrent determination circuit. The second switch is turned on based on a determination result of the second overcurrent determination circuit.

A power supply control device controls power supply from a DC power source to a load, by turning on or off a MOSFET. A current regulation circuit regulates a current flowing through a device resistor to a current proportional to a voltage between the drain and the source of the MOSFET. A drive circuit turns off the MOSFET when a voltage across a resistor circuit exceeds a predetermined voltage. The on-resistance of the MOSFET varies according to an ambient temperature of the MOSFET. The resistance of the resistor circuit varies in a direction different from a direction in which the on-resistance of the MOSFET varies, according to the ambient temperature of the MOSFET.

An electronic device including a power output, a power source, configured to provide a voltage. A device may include a current sensor configured to measure the output current. A device may include a power switching network electrically connected between the power source and the power output. A device may include a controller electrically connected to the current sensor and the power switching network, the controller configured to: determine, using the current sensor, the output current. A device may include compare the output current to a predetermined load current threshold, determine a voltage limit of the voltage of the power source as a function of the difference between the output current and the predetermined load current threshold, and control the output current to drive the load, via the power switching network, based on the voltage limit.

The present application relates to a power supply circuit of a vehicle, which power supply circuit comprises a first side (A) comprising a power source (14), a first battery pack (12) and first power consumers (16), a second side (B) connected in series with the first side (A), the second side (B) comprising a second battery pack (18) and second power consumers (20), an overload current breaker (22) provided between the first and the second side, said overload current breaker (22) having a pre-determined threshold breaking current (IThreshold) value, at which value the circuit is broken; a controller (24) connected to said power source for regulating voltage from said power source (14), the controller (24) being provided with said threshold breaking current (IThreshold) value, the controller further being operatively connected to devices (26, 28) providing information related to a current (Ich) through said overload current breaker (22). The controller (24) is arranged to determine a maximum permissible charging current (IPermissible) value in relation to the threshold breaking current (IThreshold) value; to set a low voltage (V) from said power source (14) for charging said second battery pack (18) at activation of said power source (14); to monitor, with the information from the devices (26, 28), the charging current (Ich) through said overload current breaker (22) to the second battery pack (18) and to compare the charging current (Ich) with the maximum permissible charging current (IPermissible); to increase the voltage (V) of the power source (14) if the charging current (Ich) is below the maximum permissible charging current (Ich<IPermissible); and to decrease the voltage (V) of the power source (14) if the charging current (Ich) is the same as or above the maximum permissible current (Ich≥IPermissible).

A charging system comprises a coupler configured to be coupled to an inlet of a vehicle and including a user interface, the user interface including a momentary switch mounted on the outer surface of the coupler and configured to receive a user input for an output current level selected by a user; and a light display mounted on the outer surface of the coupler and configured to illuminate a light to visually show the user selected output current level; and an in-cable control and protection device (ICCPD) disposed within a cable, the ICCPD configured to receive the user input from the momentary switch; determine an output current level that the charging system operates at, among the user selected output current level or a current limit level; and transmit back the user selected output current level to the coupler, wherein the vehicle is charged with the determined output current level.

A battery adapter can be used with an off-brand battery manufacturer to energize a power tool. The battery adapter is configured to monitor the voltage, temperature, and power level of the battery. Monitoring these levels helps prevent the tool from overdischarging the battery, as well as to prevent overheating. The battery adapter has a visible battery power level indicator, actuated by a switch, which visibly displays to a user a general indication of power left in the battery. The battery adapter is able to electrically disconnect the battery if the monitored temperature reaches a certain threshold. The battery adapter is also able to electrically disconnect if the battery adapter and off-brand battery are connected to a recharge station.

A power supply circuit for providing a positive, intermediate, and negative voltage supply includes positive and negative DC voltage buses that connect to a power source; a first voltage divider that is connected between the positive and the negative DC voltage buses, that includes a first transistor connected to the negative DC voltage bus, and that provides the intermediate voltage supply; a second voltage divider that is connected between the positive and the negative DC voltage buses and that is connected to the first transistor; and a short circuit protection module that includes a second transistor connected between outputs of the first and second voltage dividers and connected to the first transistor and that includes a current limiting element connected to the first transistor and configured to limit power dissipated by the first transistor in the case of a short circuit to the intermediate voltage supply.

A portable backup starting device for a vehicle includes an internal power source, a switching circuit, a first voltage detecting circuit, a first electrode clip, and a second electrode clip. The first electrode clip and the second electrode clip are configured to connect to a first end and a second end of a vehicle load; the internal power source has a first electrode and a second electrode. The first electrode is coupled to the first electrode clip, and the second electrode is coupled to the switching circuit; and the switching circuit is coupled to the second electrode clip. The first voltage detecting circuit is coupled to the switching circuit, the first electrode, and the second electrode.

The charging / discharging protection circuit comprises a power supply end, a grounding end, and an under-voltage protection threshold control end; the power supply end is connected to a positive electrode of a battery; the grounding end is connected to a negative electrode of the battery; the under-voltage protection threshold control end is configured to receive a first control signal. The charging / discharging protection circuit is configured to reduce an under-voltage protection threshold of the battery under the control of the first control signal when the temperature of the battery is smaller than a set temperature threshold and the discharging current of the battery is greater than a set current threshold.

To provide a system and a method for active electric power management in a medical device.SOLUTION: A respiratory treatment device includes an air blower for providing a flow of breathable gas to a patient and one or more accessory devices. The respiratory treatment device includes active electric power management for distributing electric power from an electric power source in which electric power is insufficient for simultaneous supply of electric power to the air blower and the accessory device. By the active electric power management, electric power for the air blower is given priority. Electric power supplied to the accessory device is limited so as to preserve a total of electric power drawn in the capacity of the power source or electric power drawn below the capacity of the power source on the basis of the measurement of current of the air blower and the accessory device. In the case where additional electric power can be used, the electric power for the one or more accessory devices is increased beyond a target so as to compensate for a case where electric power is not supplied to the one or more accessory devices resulting from a decrease in power consumption by the air blower.SELECTED DRAWING: Figure 5D