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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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Battery management system for electric vehicles that enables efficient power distribution between the battery and onboard systems by integrating a single MOSFET-based power management circuit. The system uses a single MOSFET controller that controls the switching between two parallel MOSFETs, one for the battery and one for the onboard systems, allowing for optimized power distribution and reduced energy consumption. The MOSFET controller is connected to the battery's positive terminal and the onboard device's positive terminal, with the MOSFETs' drain connecting to the onboard device. This integrated design eliminates the need for separate power sources while maintaining power isolation between the battery and onboard systems.

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A lithium battery management system that enables parallel operation of lithium-ion batteries while preventing simultaneous charging and discharging. The system achieves this through a novel architecture that allows battery packs to operate independently without direct electrical connection, while still enabling a single-button activation for all modules. This enables the system to achieve ultra-low power consumption while maintaining the ability to turn on all modules simultaneously.

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Energy management system for electric vehicles that provides redundant power supply for low-voltage components while balancing battery pack performance. The system integrates multiple equalization DC-DC converters, a sampling module, and a control module to manage the battery pack's voltage and current. The converters distribute power between the low-voltage DC bus and the vehicle's electrical systems, ensuring continuous operation even when the battery pack is depleted. The control module continuously monitors battery state, vehicle load, and system conditions to optimize equalization and charging operations.

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Controlling a DC power converter in an electric vehicle to optimize battery charging and prevent excessive converter operation. The converter is connected between the high-voltage power source and the low-voltage battery through a switch module. The module controls converter operation based on real-time battery state monitoring, dynamically switching between charging and discharging modes to balance converter life and battery charging needs.

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Operating a vehicle charging system to optimize low-voltage battery charging based on system parameters. The charging system monitors the state of charge of both the low-voltage battery and the traction battery, and automatically enters a sleep mode when the low-voltage battery reaches a predetermined state of charge threshold. During sleep, the charging system adjusts its charging parameters based on the current state of the low-voltage battery, enabling more efficient charging of the low-voltage battery while maintaining optimal charging conditions for the traction battery.

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Intelligent maintenance for new energy vehicles' low-voltage batteries, which enables safe charging without power loss. The system detects charging activity and transitions the low-voltage battery to charging mode. The charging process includes constant current, voltage control, and pulse control stages. A dormant maintenance mode can be activated through the vehicle's audio/entertainment system, ensuring the battery remains charged while preventing capacity loss.

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Charge control method and system that prevents vehicle systems from being awakened during charging and stops charging when the battery is not full. The method determines if the low-voltage battery is in an undervoltage condition during sleep mode and if the battery is charging. If the battery is charging, it can be safely charged using the power battery. This prevents unnecessary wake-ups and battery drain during charging, while maintaining vehicle safety.

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A charging method for low-voltage batteries in electric vehicles that maintains sufficient capacity during static periods. The method involves a dynamic charging strategy that continuously monitors the low-voltage battery state and adjusts charging rates based on the vehicle's power requirements. When the vehicle is in a static mode, the battery is charged to maintain its state of charge, while when the vehicle is in idle mode, the battery is charged to a predetermined level to ensure continuous operation. This approach enables the battery to maintain its capacity even when the vehicle is stationary, preventing rapid discharge and ensuring reliable operation.

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A method and apparatus for managing low-voltage battery charge in vehicle electrical systems. The method ensures balanced power consumption between the battery and electrical equipment by dynamically regulating the battery charge based on the load requirements of the vehicle's electronic control unit (ECU). This approach prevents over-discharging the battery while maintaining the ECU's normal operation. The method employs a balance control mechanism that continuously monitors the ECU's power consumption and adjusts the battery charge accordingly. This ensures that the battery is neither over-discharged nor under-discharged, maintaining its capacity and preventing potential electrical system failures.

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Control method and device for preventing battery degradation in electric vehicles through optimized low-voltage power management. The method and device implement advanced power management strategies that dynamically adjust power consumption based on vehicle state, including charging and discharging patterns, to minimize battery wear. The control system continuously monitors vehicle state and adjusts power levels to maintain optimal battery health, preventing degradation from prolonged charging or discharging cycles.

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A battery management system for electric vehicles that prevents power loss through intelligent control of the vehicle's electrical systems. The system integrates the vehicle's control unit, engine, generator, electrical storage battery, and electrical switchgear. The control unit is electrically connected to the engine, and the engine is connected to the generator. The battery is connected to the generator, and the battery and switchgear are connected to the control unit. This configuration enables the system to monitor and prevent power loss through coordinated control of the electrical systems.

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A method and apparatus for controlling battery voltage in electric vehicles to prevent power loss during low-voltage operation. The method involves detecting the battery voltage and determining the corresponding control strategy based on predetermined rules. The battery voltage is then used to determine whether the DC-DC converter should be enabled or disabled, thereby controlling the converter's operating state and preventing voltage loss. This approach enables optimal battery management while minimizing converter operation time.

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A charging control method for electric vehicles that optimizes battery management during charging operations. The method monitors the battery voltage and dynamically adjusts charging current based on the battery state, preventing overcharging and undercharging while maintaining optimal charging efficiency. This approach enables the vehicle controller to maintain battery health during charging operations, particularly in situations where the vehicle is in a low-state battery condition.

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A low-voltage battery charging control system for electric vehicles that optimizes charging based on real-time vehicle state. The system monitors the vehicle's low-voltage battery state and adjusts charging parameters accordingly. When the vehicle enters low-power mode, it enters a low-power mode timer that counts down to a predetermined wake-up time. When the vehicle's low-voltage battery voltage falls below a predetermined threshold, the system automatically switches to low-voltage charging. The system also monitors the vehicle's DC/DC converter operating current to prevent excessive charging. The wake-up time is calculated based on the vehicle's current state and charging requirements, ensuring optimal charging while minimizing battery loss.

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Power control system for electric vehicles that optimizes battery management by monitoring and controlling power supply and shutdown through dedicated dark current detection. The system employs a predetermined number of controllers with communication capabilities, while maintaining a power-saving state when the ignition switch is off. A dedicated dark current detection circuit is activated at predetermined intervals to monitor the power consumption of non-communication-enabled controllers, enabling accurate detection of abnormal dark current increases that would otherwise be missed by conventional current monitoring methods.

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A low-power electric vehicle battery control method that optimizes battery state-of-charge management to reduce vehicle weight while maintaining optimal performance. The method employs advanced battery management strategies to dynamically allocate power between the high-voltage battery pack and the low-voltage battery pack, allowing the vehicle to operate in both state-of-charge (SOC) and state-of-discharge (SoD) modes. By optimizing battery state-of-charge levels, the method enables the vehicle to maintain optimal battery health while reducing weight through optimized battery management.

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Power supply system for electric vehicles that enables dynamic switching between low-voltage and high-voltage power sources while maintaining battery health. The system comprises a transformer to connect the high-voltage network to the battery, a switching device to control the flow of power between the high-voltage and low-voltage networks, and a monitoring system to detect battery state of charge. The system operates in two modes: a low-voltage mode where the high-voltage network is isolated from the battery, and a high-voltage mode where the battery is charged through the high-voltage network. The system monitors battery state of charge and automatically switches between modes based on the battery's state, preventing overcharging and maintaining battery health.

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