12results about How to "Prevent over discharge" patented technology

The application discloses a passive equalization method of a battery in a charging state, and relates to the technical field of software function algorithm of vehicle power battery. The method comprises the following steps: data acquisition, data identification, data judgment and program control. The data acquisition method comprises the following steps: collecting the single battery voltage, the hardware board temperature and the lead-acid battery voltage in real time. Through the data, it can be judged whether the current battery state can be equalized. The data identification method comprises the following steps: obtaining the maximum value, the minimum value, the average value and the pressure difference between the highest single battery and the lowest single battery of the single battery voltage collected in real time. The single battery voltage is looked up from high to low to obtain the equalization SOC value corresponding to each single battery. The application can keep the lithium ion battery single battery voltage or the battery pack voltage deviation in the expected range, thereby ensuring that each single battery maintains the same state in the normal use, and avoiding overcharging and overdischarging.

This utility model discloses a charger with a storage battery, which includes a charger body and a mounting housing. The storage battery is installed in the lower part of the mounting housing, a battery management unit is installed on the upper part of the storage battery, and a charging control unit is installed on the upper part of the battery management unit. An input connector is installed at the front end of the mounting housing, and an output unit is installed at the rear end of the mounting housing. By switching the control module and the charging control unit in coordination, bidirectional energy management between the external power supply and the storage battery can be realized. When the external power supply is connected, it can directly power the electronic product and charge the storage battery simultaneously. When the power is off, it automatically switches to power supply from the storage battery. It can also charge the storage battery independently. It has the characteristics of uninterrupted power supply, dual-path operation and multi-path energy management. Combined with a safety protection module, it prevents overcharging, over-discharging, overcurrent and short circuit, improving the applicability and safety of the device in outdoor, emergency and mobile scenarios.

This utility model discloses a distributed photovoltaic energy storage system, belonging to the field of photovoltaic energy storage technology, aiming to solve the problems of high thermal runaway risk, low conversion efficiency, and insufficient synergy between photovoltaic and energy storage in existing centralized energy storage technologies. The system includes multiple distributed energy storage PACK modules and an inverter. Each PACK module integrates photovoltaic modules, an energy storage battery pack, a DC MPPT DC / DC charge / discharge controller, and a BMS. Multiple PACK modules are connected in series to form a series group, and the output of the series group is connected to the inverter to achieve AC / DC conversion. Intelligent control and monitoring can also be achieved through an EMS communication manager and a power detector. This utility model reduces the risk of thermal runaway through a distributed design, improves efficiency by integrating an MPPT controller, adapts to traditional installation methods and supports flexible expansion, and can achieve efficient synergy and peak shaving between photovoltaic and energy storage, thereby improving the economic efficiency of energy utilization.

The invention discloses an unmanned aerial vehicle self-locking switch system and a control method thereof, and relates to the technical field of unmanned aerial vehicles. The system comprises a switch button, an auxiliary power module, a main power module, a self-locking unit, a control unit and an electric quantity display unit, stable startup and shutdown are achieved through dual-time-sequence button control that first pressing lasts for a first preset time and second pressing lasts for a second preset time in cooperation with a time-sharing cooperation mechanism of auxiliary power and main power, the self-locking unit locks the switch state, and the electric quantity display unit displays the electric quantity. And accidental on-off caused by signal jitter is avoided. The system is extremely low in leakage current in a shutdown state, effectively prevents battery over-discharge, has electric quantity display and state feedback functions, and remarkably improves the reliability, safety and user experience of the switch.

The application discloses a solar charging and discharging management circuit, which comprises a power management module, a battery pack, an analog front end monitoring module, a power output branch and a main control module. The input end of the power management module is connected with a solar panel interface, which is used for converting input electric energy through a maximum power point tracking (MPPT) function. The battery pack is connected with the power output end of the power management module. The analog front end monitoring module is connected with the battery pack, which is used for collecting physical state information of the battery pack in real time. The input end of the power output branch is connected with the battery pack and the power output end of the power management module, and the output end of the power output branch is provided with a controlled switch, which is used for providing direct current to an external load. The main control module is connected with the analog front end monitoring module and the controlled switch, which is used for calculating battery power according to the physical state information and controlling the opening and closing states of the controlled switch according to the battery power. Through MPPT conversion, AFE high-precision monitoring and main control intelligent closed-loop control, the application realizes efficient energy utilization and accurate battery protection.

The invention relates to the technical field of chemical production power supply safety, in particular to a chemical multi-loop guarantee power supply method and system. According to the method, a three-level power supply architecture in which a main power supply is configured to be a double-circuit mains supply, a first-level standby power supply is a UPS power supply and a second-level standby power supply is a diesel generator is adopted, and a PLC is utilized to monitor the voltage, frequency and harmonic distortion rate of the main power supply in real time; when the main power supply fails, the main power supply is switched to UPS power supply within 10-30 ms; when the energy storage of the UPS is insufficient, the diesel generator is started in advance, and load transfer is completed within 30-60 ms; and after the main power supply is recovered, the load is switched back according to the principle of connection-before-disconnection. According to the invention, millisecond-level seamless power supply switching is realized, the continuity and reliability of power supply of chemical key equipment are remarkably improved, the risk of unplanned shutdown and the probability of safety accidents are effectively reduced, and the operation economy is optimized through intelligent management.

The invention relates to the field of medical care equipment, and discloses a portable electronic cold compress device which comprises a cold compress device shell, a cold compress device cover plate is arranged on the front side of the cold compress device shell, two sets of mounting blocks are arranged on each of the left side and the right side of the cold compress device shell, and binding belts are arranged on the sides, away from each other, of the two sets of mounting blocks. Connecting hook-and-loop fasteners are arranged on the outer sides of the four binding belts, a flexible protection layer is arranged on the front surface of the cold compress device cover plate, fixing plates are arranged on the sides, close to each other, of the four binding belts, and T-shaped movable inserting blocks are arranged on the sides, close to each other, of the four fixing plates. And movable mounting grooves matched with the mounting blocks are formed in the sides, far away from each other, of the four groups of mounting blocks. Through closed-loop control of the temperature sensing module and the main control module, accurate adjustment of the temperature of the cover plate of the cold compress device is achieved, the cold compress temperature is stably maintained in a target range set by a user, and controllability and consistency of the treatment effect are guaranteed.

The utility model discloses a kind of vehicle-mounted equipment power supply low-voltage protection and spare battery switching control circuit, including first power conversion circuit, second power conversion circuit, hysteresis comparator circuit and spare battery switch circuit.First power conversion circuit is filtered to vehicle-mounted power supply, DC-DC conversion is carried out, and multiple protection circuits are set;Second power conversion circuit reduces voltage output stable voltage to vehicle-mounted power supply;Hysteresis comparator circuit real-time monitoring vehicle-mounted power supply voltage;Spare battery switch circuit switches to spare battery power supply when low voltage.It can real-time monitoring vehicle-mounted power supply voltage, when voltage is lower than set threshold, cut off vehicle-mounted power supply and rear-end equipment connection, prevent automobile battery overdischarge, while automatically switched to spare battery power supply, guarantee vehicle-mounted equipment continuous operation.In addition, through hysteresis voltage comparator design, avoid circuit frequently switching, improve system stability and reliability, ensure the continuity of automobile intelligent function.

This utility model relates to a stroller controller with a timed shutdown function, comprising a housing and a circuit board. The circuit board is installed inside the housing, and multiple buttons are located on the top of the housing. The circuit board includes a main control MCU module, a power supply module, a power switch and drive module, a button backlight display module, and a lighting control module. The main control MCU module is electrically connected to the power supply module, the power switch and drive module, the button backlight control module, and the lighting control module. The power supply module provides power to the circuit board. The power switch and drive module controls the stroller's power on / off and the stroller motor's movement. When the stroller remains inactive for the designated shutdown time, the main control MCU module sends a command to the power switch and drive module, which then shuts off the stroller. This effectively reduces the risk of spontaneous combustion, improves safety, significantly extends battery life, avoids damage from over-discharge, reduces the number of battery charging cycles, and improves energy efficiency.

The invention belongs to the technical field of energy storage cluster primary frequency modulation control, and particularly discloses an energy storage cluster primary frequency modulation control method and system based on analog quantity control, and the method comprises the steps: collecting a power grid frequency signal in real time, and calculating a frequency deviation; identifying a frequency disturbance type, dynamically determining a frequency modulation coefficient, and calculating a primary frequency modulation power instruction based on the frequency deviation and the frequency modulation coefficient; performing power amplitude limiting and distribution optimization on the primary frequency modulation power instruction according to the charge state of each battery pack in the energy storage cluster; and the optimized power instruction is converted into a 4-20 mA current signal, the 4-20 mA current signal is broadcasted and sent to all the energy storage converters, each energy storage converter dynamically adjusts a power distribution coefficient according to the difference between the own charge state and the average charge state of the cluster, and primary frequency modulation control of the energy storage cluster is completed. According to the invention, the problems of insufficient response speed, asynchronous cluster operation, unbalanced SOC management, insufficient anti-interference capability and insufficient disturbance adaptive capability in the prior art are solved.

The utility model provides a high-voltage battery pack equalization control circuit, which comprises an isolation transformer module, a first bridge switch module, a second bridge switch module, an isolation driver module and a monitoring module, and is characterized in that energy transmission is realized by using a high-efficiency isolation transformer and an MOS (Metal Oxide Semiconductor) tube, the energy loss is reduced, and the service life of the high-voltage battery pack is prolonged. And meanwhile, the stability of energy conversion is ensured. The isolation driver module provides electrical isolation protection, avoids the influence of a high-voltage circuit on a low-voltage control circuit, improves the safety of the system, cooperates with the monitoring module, detects the current, voltage and balance state of a battery cell in real time, responds to an abnormal condition in time, and prevents a battery from being overcharged or overdischarged. The system adopts a modular design, and each battery pack is provided with a DC-DC circuit, so that the system can be conveniently expanded.

The application discloses a range extending drive mechanism, an aircraft and a battery pack assembly. The range extending drive mechanism comprises an internal combustion engine, a generator, an electric motor, a plurality of battery packs and a plurality of charging circuits corresponding to the battery packs respectively, and further comprises a first array switch and a controller. The internal combustion engine is connected with the generator; the generator is connected with the electric motor. In addition, the generator is connected with the plurality of charging circuits through the first array switch respectively; and the first array switch is connected with the controller, and is used for controlling the conduction and disconnection between the charging circuits and the generator.