127results about "Battery overcurrent protection" patented technology

A control switch incorporating a 1:2 demultiplexer is used in controlling timing for concurrent switching, break-before-make and make-before-break power multiplexing, and is configurable to link a plurality of the control switches into a control chain to perform sequential charging, sequential discharging, parallel charging, parallel discharging, simultaneous sequential charging and discharging for a plurality of batteries coupled to the control chain in a power system.

A short circuit identification method is provided for a sampling element of a battery management system. A temperature sensor is disposed in a battery management system to monitor a temperature of a discharge transistor, and the method includes: obtaining the temperature of the discharge transistor by using the temperature sensor, and calculating a temperature difference of the discharge transistor in a preset duration; comparing a discharge current obtained by using a sampling element with a preset current threshold; and determining that the sampling element is short-circuited. In embodiments of the present application, the temperature sensor is used to monitor the temperature change rate of the discharge transistor in the BMS system, it can be detected that only one sampling element has a short-circuit fault with reference to the discharge current obtained by the sampling element, and corresponding protection measures are taken, so that the BMS system runs safely and stably.

A battery system is mounted on an eVTOL. The battery system includes a battery, an auxiliary battery, and a charge-related equipment. The battery supplies power to a drive target including a rotor blade of the eVTOL. The auxiliary battery charges the battery. The charge-related equipment controls charging from the auxiliary battery to the battery. The charge-related equipment has a function of electrically connecting or disconnecting the auxiliary battery and the battery. It is possible to reduce bias in ion concentration caused by discharge during a flight by temporarily charging the battery from the auxiliary battery and changing the direction of the current so as to reduce the temporary deterioration. Thus, the safety of the flight can be enhanced.

A power supply circuit having a current control mechanism is provided. The power supply circuit includes a charging driver, a plurality of input current processing circuits, a charging circuit and a control circuit. The charging driver includes a plurality of switch components and a driver circuit. The control circuit controls the plurality of input current processing circuits respectively to switch the plurality of switch components. At least one of a plurality of input currents that are supplied by a plurality of external input power sources flows to the driver circuit through at least one of the plurality of switch components. The driver circuit transmits the at least one of the plurality of input currents to the charging circuit, and drives the charging circuit to use the at least one of the plurality of input currents to charge an electronic device.

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 battery system of an electric vehicle includes a plurality of battery packs. Each battery pack includes a plurality of battery cells enclosed within a housing. A battery management device is electrically connected to each of the battery packs and configured to control an electrical output of the plurality of battery packs.

A battery system of an electric vehicle includes a plurality of battery packs. Each battery pack includes a plurality of battery cells enclosed within a housing. A battery management device is electrically connected to each of the battery packs and configured to control an electrical output of the plurality of battery packs.

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 system for suppressing inrush currents is described. The system may include a positive temperature coefficient (NTC) thermistor and a positive temperature coefficient (PTC) thermistor arranged in series between a power source and a battery system to be charged. At a low temperature, while the PTC thermistor provides only minimal resistance to minimize an inrush current, the NTC thermistor provides increased resistance. As the temperature increases, the resistance provided by the PTC thermistor increases as the resistance from the NTC thermistor decreases. The system may be used in conjunction with a battery charging system has at least one current pathway from the power source to the battery system.

The invention provides a charging control method and a charging control device for a battery management system. The control method comprises the step of selecting to enter a corresponding charging mode based on the charging state of the BMS. The charging modes comprise a large-current charging mode, a floating charging mode, a charging stopping mode and a charging protecting mode. Within the initial set time when the BMS starts to work, the BMS works in the protection charging mode. And in the protection charging mode, charging the battery within a protection charging current threshold value. And after the initial set time is over, selecting to enter one of the protection charging mode, the large-current charging mode, the floating charging mode and the charging stopping mode based on the charging state of the BMS. According to the invention, the problem that the BMS is damaged due to large circulating current generated when a plurality of BMSs with different voltages or capacities are connected in parallel is solved.

The present disclosure provides a charging and discharging circuit, a charging and discharging control method, and a vehicle. The charging and discharging circuit comprises a filtering processing module, a driving circuit, and a generator circuit. The generator circuit comprises a transformer module. An input end of the filtering processing module is configured to receive an input voltage, and an output end of the filtering processing module is connected to the driving circuit. The driving circuit and the generator circuit each comprise a plurality of bridge arms, and the bridge arms are connected in parallel. The transformer module is connected to all the bridge arms of the generator circuit and is connected to one of the bridge arms of the driving circuit. The charging and discharging circuit has a charging state and a discharging state. In the charging state, the driving circuit forms a power factor correction module, and the generator circuit forms a resonance module.

A portable power source. The portable power source includes a housing, a first battery pack support configured to receive a first removable and rechargeable battery pack, a second battery pack support configured to receive a second removable and rechargeable battery pack, an inverter within the housing, and an alternating current power outlet. The inverter is configured to receive output power from the first removable and rechargeable battery pack and the second removable and rechargeable battery pack. The inverter is configured to produce an alternating current power output. The alternating current power outlet is configured to receive the alternating current power output from the inverter. The inverter is configured to be disabled when the first removable and rechargeable battery pack is received in the first battery pack support and the second removable and rechargeable battery pack is not received in the second battery pack support.

A system includes an electric mobile application having a configurable charging circuit, the configurable charging circuit including an AC charging circuit couplable to a charging station on a first side, a DC charging circuit selectively couplable to a high voltage battery of the electric mobile application on a first side, and a switch interposed between the AC and DC charging circuits, where the switch provides selective coupling between the AC charging circuit on a second side and the DC charging circuit on a second side, where the switch in a first position couples the AC charging circuit to the DC charging circuit through a first inductive coupling arrangement utilizing a magnetic component, and where the switch in a second position couples the AC charging circuit to the DC charging circuit through a second inductive coupling arrangement utilizing the magnetic component.

A battery device with a C-rate of 1C includes a battery cell, a protection chip, and a microcontroller. The protection chip is electrically connected to the battery cell, determines whether to activate the protection mechanism of the battery device according to the state of the battery cell. The microcontroller is electrically connected to the protection chip, detects the RSOC of the battery cell. When an external power supply is electrically coupled to the battery device, and the RSOC of the battery cell is lower than 50%, the microcontroller controls the battery cell to perform a fast charging not over 10 minutes. During the 10 minutes of fast charging, the protection chip activates the protection mechanism, or the microcontroller detects that the battery cell has changed from a CC state to a CV state, the microcontroller stops the fast charging and restores the C-rate of the battery cell to 1C.

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.

A BMU (management apparatus) of a secondary battery (energy storage device) includes a management part that operates by power supplied from the secondary battery, and a capacitor (backup power source) that supplies power to the management part when a voltage of the secondary battery decreases.

An electronic component unit (10) applied to a wire harness (WH) includes a power supply terminal (11) that is connected to a power supply (B2) mounted on a vehicle (V) and capable of supplying power at a first voltage (V1), a circuit branch portion (13) that is connected to the power supply terminal (11) to branch power supplied from the power supply (B2) into a plurality of power supply systems (PL), and a voltage converter (15) that is detachably provided from at least one of the plurality of power supply systems (PL) in the circuit branch portion (13), and converts a voltage of the power supplied from the power supply (B2) into a second voltage (V2) lower than the first voltage (V1) to output the second voltage (V2).

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 present disclosure provides a charging system. The charging system includes a first device. The first device includes a first power interface. The first device further includes a first communication module. The first communication module includes at least one first transceiver. The first device further includes a second communication module. The second communication module includes at least one second transceiver. The first device further includes an intrinsic barrier disposed between and physically separating the first communication module from the second communication module. The first communication module and the second communication module are configured to wirelessly exchange data signals therebetween. The charging system further includes a second device including a second power interface. The first power interface and the second power interface are configured to be electrically connected to each other to transfer electrical power between the first and second devices.

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 battery unit 22a includes: a first connection terminal 41; a second connection terminal 48 configured so as to be connectable to a storage battery 42; a power conversion circuit 43 connected between the first connection terminal 41 and the second connection terminal 48; and a control circuit 44 that controls the power conversion circuit 43 and is configured so as to be able to measure the terminal voltage value V41 of the first connection terminal 41 and the current Ia flowing from the power conversion circuit 43 to the second connection terminal 48. The control circuit 44 compares the terminal voltage value V41 with a first threshold value in a state in which the current Ia flows from the power conversion circuit 43 to the second connection terminal 48 and, when the terminal voltage value V41 passes across the first threshold value, controls the power conversion circuit 43 so as to decrease the current Ia flowing from the power conversion circuit 43 to the second connection terminal 48 until the terminal voltage value V41 passes across the first threshold value again.

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 power control device that can charge a battery by controlling output of a conversion unit configured to convert supplied grid electric power into electric power for charging, the power control device includes: a sensing unit configured to sense voltage and current of the grid electric power; a determination unit configured to determine whether a sensed voltage sensed by the sensing unit is in an unstable state in which the sensed voltage drops relative to a rated voltage of the grid electric power; a calculation unit configured to calculate an allowable power value based on the sensed voltage and a rated current of the grid electric power in a case where the determination unit determines that the sensed voltage is in the unstable state; and a control unit configured to control the output of the conversion unit based on the allowable power value.

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

In an embodiment of the techniques presented herein, a system includes a universal serial bus (USB) port, a battery module, and a USB power delivery (USB-PD) controller. The battery module has a configuration memory configured to store battery module configuration data and a voltage sensor configured to generate a battery module voltage measurement. The USB-PD controller is configured to determine a maximum current discharge parameter based on the battery module voltage measurement and the battery module configuration data, determine a power delivery profile based on the maximum current discharge parameter, negotiate a power delivery contract with a device connected to the USB port based on the power delivery profile, and provide power from the battery module to the USB port based on the power delivery contract.

A charging / discharging overcurrent protection circuit and method. The circuit includes: an internal resistance sensing module, for sensing total internal resistance of serial charge / discharge switch transistors according to a preconfigured ratio in a charging / discharging state; a voltage selection module, connected to the internal resistance sensing module, for switching between different links according to a voltage gating switch so as to be connected to the internal resistance sensing module, to output a charging detection voltage and a charging reference voltage in a charging state, and output a discharging detection voltage and a discharging reference voltage in a discharging state; and an overcurrent signal generation module, connected to the voltage selection module, for switching between different inputs according to an input gating switch so as to generate a charging / discharging overcurrent protection signal according to a comparison result. The present disclosure resolves many problems caused by a precision resistor R0 in battery protection systems.