Sleep Current Optimization in EV Battery Management Systems

Cell monitoring device and battery management system that enables high-speed wireless communication between the device and a gateway while maintaining power efficiency. The device operates in both active and sleep modes, with the gateway device controlling communication between the device and the battery management system. When active, the device transmits detailed cell state data through a high-speed wireless communication scheme, while in sleep mode, it transmits periodic heartbeat signals to maintain system integrity. This dual-mode approach enables the battery management system to communicate with the cell monitoring device while conserving power.

Source

Automotive battery management system sleep control method that optimizes battery protection through a dynamic sleep duration adjustment strategy. The method determines the optimal sleep duration based on the probability of battery anomalies, rather than a fixed delay time. When battery anomalies are detected, the system delays sleep to prevent premature disconnection, while maintaining a higher sleep duration for critical battery states. This approach balances energy efficiency with battery protection, enabling the battery management system to maintain optimal operational conditions while minimizing power consumption.

Source

A current monitoring system for electric vehicles that enables precise detection of power drain during vehicle operation. The system utilizes the vehicle's intelligent power distribution system to monitor the sleep current of each electrical circuit, automatically detecting abnormal drain levels even when other vehicle systems are dormant. This allows the system to pinpoint the source of excessive power consumption, enabling proactive maintenance and reducing battery degradation.

Source

Battery management system for electric vehicles that enables dynamic state management through accelerometer-based hibernation. The system switches between operating and hibernation modes based on accelerometer readings, allowing the battery to enter a low-power state when the vehicle is stationary. This approach enables the battery to conserve energy while the vehicle is parked, while still maintaining control over the vehicle's state.

Source

A battery management system (BMS) sleep control method that optimizes power management through advanced analysis of dynamic power cycles and system behavior. The method employs machine learning algorithms to predict power consumption patterns and identify optimal sleep states based on historical data. It analyzes both static and dynamic power consumption characteristics, including peak values, average power consumption, and power fluctuations, to determine the most effective sleep strategy. The method then applies this analysis to generate personalized sleep control parameters, enabling more accurate and adaptive power management.

Source

Vehicle low-power sleep control method and its control system for electric vehicles to reduce battery quiescent current consumption. The system enables ultra-low power consumption mode by dynamically controlling power consumption of critical vehicle systems, particularly power-hungry components like the DCDC converter. When requested, the system automatically shuts down these components, significantly reducing the low-voltage battery's power consumption. This approach enables extended battery life while maintaining vehicle performance.

Source

Monitoring battery state in electric vehicles during sleep mode using CAN network communication. The system enables battery state monitoring even when the vehicle's control unit is in sleep mode, by periodically waking the CAN network controller and requesting battery data from an external monitoring terminal. The monitoring terminal continuously sends battery state data to the CAN network controller, which then transmits it to the vehicle's control unit. This approach prevents battery degradation during extended sleep periods by continuously monitoring the battery's state.

Source

Battery management system for electric vehicles that optimizes energy efficiency during sleep mode by integrating a current-limiting circuit with a main power circuit. The system comprises a current-limiting circuit with a first controllable switch and a current-limiting resistor, a main circuit with a second controllable switch, and a battery management system control unit. When the system enters sleep mode, the first controllable switch is enabled, and the second controllable switch is disabled, allowing the battery management system to maintain continuous power delivery to the vehicle's load while reducing battery capacity degradation during sleep periods.

Source

Battery management system for lithium-ion batteries that optimizes power delivery during sleep mode. The system maintains continuous power supply to the vehicle load while the battery management system is in sleep mode, reducing battery capacity degradation and enabling continuous vehicle operation. The system employs a dedicated power circuit that automatically switches to active mode when the battery management system enters sleep, ensuring uninterrupted vehicle operation.

Source

Vehicle control method, device, vehicle, and equipment to prevent battery discharge during vehicle dormancy and prevent ignition hazards. The method and device implement a power management system that monitors and controls vehicle power state transitions to prevent excessive sleep current drain and battery discharge. The system detects vehicle dormancy and initiates a controlled sleep mode that regulates power consumption during this period, ensuring safe and efficient battery operation.

Source

Charging circuit for electric vehicles that enables reliable power delivery from the battery to the vehicle's integrated systems. The circuit comprises a DC-to-DC converter, a battery management system, and an additional power supply circuit that can be controlled by a separate switch module. The converter converts the high-voltage power from the battery to a low-voltage supply, while the switch module enables or disables the converter based on the vehicle's operational requirements. This configuration enables the vehicle to maintain normal operation while the battery is charging, without the need for battery replacement.

Source

Vehicle power management system that optimizes battery life during vehicle dormancy. The system integrates a control module with power-off devices and limiting devices that communicate with each other. During vehicle operation, the control module monitors power consumption and automatically switches to a low-power mode when the vehicle is in a dormant state, automatically turning off non-essential systems like the infotainment system. This approach enables the vehicle to maintain optimal battery health while conserving energy when not in use.

Source

Battery management system that optimizes charging and discharging of vehicle batteries based on real-time power consumption patterns. The system monitors battery state-of-charge (SOC) and charging efficiency over a predetermined time window during vehicle sleep mode, then dynamically controls the charging circuit to maintain optimal SOC levels while preventing excessive charging. This approach enables more efficient battery management by avoiding premature discharging during sleep mode, while still allowing charging during normal operating conditions.

Source

Battery management system for electric vehicles that optimizes power consumption while maintaining system stability. The system incorporates advanced power management techniques to minimize power drain while ensuring reliable operation of critical components. This enables the battery management system to maintain optimal performance characteristics while reducing the risk of component damage from power fluctuations.

Source

Power management system for optimizing battery quiescent current in low-power devices. The system employs a dual-mode power supply architecture that seamlessly transitions between battery power and LDO (Low Drop Out) stabilization. The system maintains a constant quiescent current across full voltage ranges by dynamically switching between battery and LDO power sources, enabling extended battery life in low-power applications.

Source

Dormant quiescent current control system for automotive door control modules (DCMs) that enables complete dormancy while maintaining real-time remote key signal monitoring. The system comprises a DCM with an MCU, a wireless RF receiver circuit, and a dedicated wake-up circuit that connects to the MCU. The wake-up circuit features a separate external wake-up module that can be activated to initiate the DCM's dormant state. This design enables the DCM to enter a dormant quiescent state while continuously monitoring the remote key signal, achieving a quiescent current of less than 5mA.

Source

In-vehicle control device that enables power-saving operation through optimized current management while maintaining reliable system operation. The device comprises a load part that operates on battery power, a reverse connection protection element in the power path, and a current abnormality detection unit. The protection element prevents reverse current flow when the battery is connected in reverse, while the detection unit monitors current levels to identify abnormal conditions. This integrated approach eliminates the need for separate circuits for detecting reverse current and determining the ECU responsible for it, thereby reducing circuit scale and improving system reliability.

Source

DC/DC converter start control circuit for electric vehicles that enables reliable startup by dynamically controlling the connection between the high-voltage power supply and the DC/DC conversion circuit. The circuit comprises a first switching unit, a second switching unit, a DC/DC conversion circuit, a microprocessor, and a low-voltage battery. The high-voltage power supply is connected to the DC/DC conversion circuit, and the microprocessor controls the switching units to establish a connection between the high-voltage power supply and the DC/DC conversion circuit when the battery voltage is below a predetermined threshold. This enables the vehicle to start normally even when the battery voltage is too low.

Source

Battery management system for electric vehicles that integrates advanced power control and state-of-charge monitoring. The system comprises a main control module, a signal acquisition circuit, a power signal processing circuit, and a charge and discharge control circuit. The main control module controls the acquisition, processing, and control of the power signal, while the power signal processing circuit regulates the motor's operating state. The charge and discharge control circuit manages the battery's state-of-charge. This integrated architecture enables precise power management and state-of-charge monitoring in electric vehicles.

Source

A sleep control system for vehicle controllers that optimizes power consumption by dynamically regulating the sleep state. The system integrates a power interface, MCU, working module, wake-up source, and System Basis Chip (SBC) into a single component. The SBC implements an automotive ECU, enabling the system to manage the controller's power consumption through intelligent sleep management. The system monitors the controller's CAN bus, door status, and other critical parameters to determine when to transition the controller into sleep mode. This enables the controller to maintain its functionality while conserving battery power.

Source