Abstract: A circuit protection apparatus includes a current detection module, a driver module, and a fuse module. The current detection module is connected to the driver module and a circuit under test separately. The current detection module is configured to detect a current value in the circuit under test, and in a case that the current value is greater than a preset current threshold, send a drive signal to the driver module. The fuse module is connected in series in the circuit under test. An input end of the driver module is connected to the current detection module, and an output end of the driver module is connected to the fuse module. The driver module is configured to drive the fuse module to disconnect the circuit under test upon receiving the drive signal.

Abstract: The battery management system includes: a plurality of switch assemblies, each being connected between a battery and a corresponding load, and configured to connect the battery to the corresponding load or disconnect the battery from the corresponding load; a sampling circuit including sampling branches in a one-to-one correspondence with the plurality of switch assemblies, and each sampling branch being configured to acquire a voltage at a sampling detection point, where a first end of each sampling branch is connected to a corresponding switch assembly, and a connection point is the sampling detection point; a second end of each sampling branch is connected to a voltage source, and a connection point is a reference sampling point; and a third end of each sampling branch is connected to a sampling module; the voltage source, configured to supply a reference voltage to the reference sampling point; and the sampling module.

Abstract: A signal sampling circuit, a battery management system, a battery system, and an electric device. The signal sampling circuit comprises a first voltage divider module, a first switch module, and a sampling module, wherein the first voltage divider module and the first switch module are connected in series between a point to be detected and a reference signal terminal of the sampling module, a first control terminal of the first switch module is connected to a first power supply terminal, a second control terminal of the first switch module is connected to an enabling signal terminal of the sampling module, and the sampling module is connected to a first reference ground; and the first voltage divider module is provided therein with a sampling point, and the sampling module is configured to collect a sampled signal of the sampling point. This helps to reduce the cost of the signal sampling circuit.

Abstract: A signal sampling circuit, a battery management system, a battery system, and a power consuming apparatus is disclosed. The signal sampling circuit includes a voltage division module, a switching module, and a sampling module. The voltage division module and the switching module are connected in series between a to-be-tested point and a reference signal end of the sampling module. A control end of the switching module is connected to an enable signal end of the sampling module. The sampling module is connected to a first reference ground. A sampling point is provided in the voltage division module. The sampling module is configured to acquire a sampling signal of the sampling point. Embodiments of the present application help reduce costs of the signal sampling circuit.

Abstract: A liquid leakage detection circuit including: a sampling circuit, the sampling circuit having an output end connected to an input end of an excitation source circuit and used for sending a control signal to the excitation source circuit; and the excitation source circuit , the excitation source circuit having an output end connected to a signal detection circuit and used for generating an excitation signal on the basis of the control signal and sending the excitation signal to the signal detection circuit, and the excitation signal being a periodic pulse signal. The sampling circuities further used for collecting a liquid leakage state signal of a battery pack in the signal detection circuit, wherein the liquid leakage state signal is generated in response to the excitation signal, so that liquid leakage detection for the battery pack can be achieved. A liquid leakage detection system and a battery management system is disclosed.

Abstract: A sampling circuit and a calibration method therefor, a battery management system, and an electric device. The calibration method comprises: acquiring the voltage of a first type sampling point and the voltage of a second type sampling point; on the basis of the voltage of the first type sampling point and the voltage of the second type sampling point, determining a calibration factor corresponding to the first type sampling point; and on the basis of the calibration factor, correcting the voltage of the first type sampling point to obtain the corrected voltage of the first type sampling point.

Abstract: Embodiments of this application relate to the monitoring field, and disclose a method for monitoring an insulation monitoring circuit and a battery management system. In some embodiments of this application, the method for monitoring an insulation monitoring circuit includes: in a state in which a first switch and a second switch are closed and a third switch is open, obtaining a first electrical signal detected by a second monitoring module; and based on the first electrical signal and a voltage reference value between a positive electrode of a battery pack and a negative electrode of the battery pack, determining whether an insulation monitoring circuit is faulty; or obtaining a second electrical signal detected by a first monitoring module and a third electrical signal detected by a third monitoring module, and based on the second electrical signal and the third electrical signal, determining whether the insulation monitoring circuit is faulty.

Abstract: Embodiments of this application relate to the field of circuit technologies. A wake-up circuit and a rechargeable device are disclosed. The wake-up circuit includes an input control module, a drive module, and an output control module. The input control module, the drive module, and the output control module each are connected to an auxiliary power supply. The input control module is configured to output a first level signal when an external voltage signal is received. The drive module is configured to, when the first level signal is received, output a second level signal that lasts for a first preset time. The output control module is configured to, when the second level signal is received, output a wake-up signal that lasts for the first preset time to a battery management system. According to this application, the wake-up circuit and the BMS consume less power of the auxiliary power supply.

Abstract: Embodiments of this application relate to the monitoring field, and disclose a method for monitoring an insulation monitoring circuit and a battery management system. In some embodiments of this application, the method for monitoring an insulation monitoring circuit includes: in a state in which a first switch and a second switch are closed and a third switch is open, obtaining a first electrical signal detected by a second monitoring module; and based on the first electrical signal and a voltage reference value between a positive electrode of a battery pack and a negative electrode of the battery pack, determining whether an insulation monitoring circuit is faulty; or obtaining a second electrical signal detected by a first monitoring module and a third electrical signal detected by a third monitoring module, and based on the second electrical signal and the third electrical signal, determining whether the insulation monitoring circuit is faulty.

Abstract: A smoke alarm system comprises a smoke alarm, a temperature detector, a first sampling circuit, a second sampling circuit and an analysis module; a first terminal of the first sampling circuit is connected to the smoke alarm, and a second terminal is connected to a first input terminal of the analysis module; the first sampling circuit is used for sampling from the smoke alarm to obtain a smoke sample value which is then output to the analysis module; a first terminal of the second sampling circuit is connected to the temperature detector, and a second terminal is connected to a second input terminal of the analysis module; the second sampling circuit is used for sampling from the temperature detector to obtain a temperature sample value which is then output to the analysis module; and the analysis module determines whether a smoke alarm signal is generated.

Abstract: The present application discloses a wake-up method and wake-up system for a battery management system. The method may include converting, by a conversion unit, a low-voltage power signal detected at a low-voltage input port into a high-voltage wake-up signal, and receiving, by a high-voltage control module, a working voltage provided by a power battery pack under control of the high-voltage wake-up signal; controlling, by the high-voltage control module, the high-voltage transmission module to be turned on, providing the working voltage to a synchronous rectifying module by the turned-on high-voltage transmission module, and converting high-voltage electric energy provided by the power battery pack into low-voltage electric energy; and transmitting, under control of the synchronous rectifying module, the low-voltage electric energy to the low-voltage controller, and waking up the battery management system by the low-voltage controller.

Abstract: Some embodiments relate to battery management technologies, and disclose a battery management system and an energy storage power station. The battery management system comprises: a plurality of CSC groups corresponding to a plurality of battery packs respectively, CSCs in each CSC group being connected to the battery units in a battery pack respectively; a plurality of SBMUs corresponding to the plurality of CSC groups respectively, each SBMU being connected to every CSC in a CSC group; an MBMU and an IMM, the MBMU being connected to every SBMU and connected to the IMM; the IMM further being connected to a plurality of the batteries, and used to acquire insulation parameter values of the plurality of the batteries.

Abstract: A battery pack management system includes a controller, an isolation unit, a plurality of battery pack management units, and a plurality of battery packs. The plurality of battery pack management units are connected in series by a first daisy chain, and the plurality of battery pack management units are also connected in series by a second daisy chain. The first daisy chain transmits sampled data that is collected by the battery pack management units from corresponding battery packs and transmits control instructions of the controller. The second daisy chain transmits a failure prompt signal which is generated by a battery pack management unit that detects a failure. A first battery pack management unit and a last battery pack management unit of the plurality of battery pack management units connected in series are connected to the controller through the isolation unit.

Abstract: Embodiments of this application relate to the field of circuit technologies. A wake-up circuit and a rechargeable device are disclosed. The wake-up circuit includes an input control module, a drive module, and an output control module. The input control module, the drive module, and the output control module each are connected to an auxiliary power supply. The input control module is configured to output a first level signal when an external voltage signal is received. The drive module is configured to, when the first level signal is received, output a second level signal that lasts for a first preset time. The output control module is configured to, when the second level signal is received, output a wake-up signal that lasts for the first preset time to a battery management system. According to this application, the wake-up circuit and the BMS consume less power of the auxiliary power supply.

Abstract: The present application discloses a wake-up method and wake-up system for a battery management system. The method may include converting, by a conversion unit, a low-voltage power signal detected at a low-voltage input port into a high-voltage wake-up signal, and receiving, by a high-voltage control module, a working voltage provided by a power battery pack under control of the high-voltage wake-up signal; controlling, by the high-voltage control module, the high-voltage transmission module to be turned on, providing the working voltage to a synchronous rectifying module by the turned-on high-voltage transmission module, and converting high-voltage electric energy provided by the power battery pack into low-voltage electric energy; and transmitting, under control of the synchronous rectifying module, the low-voltage electric energy to the low-voltage controller, and waking up the battery management system by the low-voltage controller.

Abstract: A smoke alarm system comprises a smoke alarm, a temperature detector, a first sampling circuit, a second sampling circuit and an analysis module; a first terminal of the first sampling circuit is connected to the smoke alarm, and a second terminal is connected to a first input terminal of the analysis module; the first sampling circuit is used for sampling from the smoke alarm to obtain a smoke sample value which is then output to the analysis module; a first terminal of the second sampling circuit is connected to the temperature detector, and a second terminal is connected to a second input terminal of the analysis module; the second sampling circuit is used for sampling from the temperature detector to obtain a temperature sample value which is then output to the analysis module; and the analysis module determines whether a smoke alarm signal is generated.

Abstract: A smoke alarm system comprises a smoke alarm, a temperature detector, a first sampling circuit, a second sampling circuit and an analysis module; a first terminal of the first sampling circuit is connected to the smoke alarm, and a second terminal is connected to a first input terminal of the analysis module; the first sampling circuit is used for sampling from the smoke alarm to obtain a smoke sample value which is then output to the analysis module; a first terminal of the second sampling circuit is connected to the temperature detector, and a second terminal is connected to a second input terminal of the analysis module; the second sampling circuit is used for sampling from the temperature detector to obtain a temperature sample value which is then output to the analysis module; and the analysis module determines whether a smoke alarm signal is generated.

Abstract: A method and apparatus for detecting a circuit malfunction. The method includes: receiving a detection instruction and controlling a plurality of equalization modules to be turned off in response to the detection instruction; collecting first sampled data of sampled equalization modules; controlling odd numbered equalization modules among the sampled equalization modules to be turned on and even numbered equalization modules among the sampled equalization modules to be turned off; collecting second sampled data of the sampled equalization modules; controlling the odd numbered equalization modules among the sampled equalization modules to be turned off and the even numbered equalization modules among the sampled equalization modules to be turned on; collecting third sampled data of the sampled equalization modules: and determining, according to the first sampled data, second sampled data and third sampled data, a malfunction in a sampling detection circuit and locating the malfunction.

Abstract: The disclosure discloses a sampling detection circuit and a method for detecting a circuit malfunction.

Abstract: A smoke alarm system comprises a smoke alarm, a temperature detector, a first sampling circuit, a second sampling circuit and an analysis module; a first terminal of the first sampling circuit is connected to the smoke alarm, and a second terminal is connected to a first input terminal of the analysis module; the first sampling circuit is used for sampling from the smoke alarm to obtain a smoke sample value which is then output to the analysis module; a first terminal of the second sampling circuit is connected to the temperature detector, and a second terminal is connected to a second input terminal of the analysis module; the second sampling circuit is used for sampling from the temperature detector to obtain a temperature sample value which is then output to the analysis module; and the analysis module determines whether a smoke alarm signal is generated.