48results about How to "Avoid deep discharge" patented technology

A balancing method for a battery pack includes balancing battery cells near an end of discharge. A deep discharge of the battery cells can be prevented without using an overdischarge control unit. One battery cell balancing method includes: a balancing check condition determination step for determining whether or not a maximum voltage out of voltages of the battery cells is smaller than a reference voltage; a balancing start condition determination step for determining whether or not a residual capacity difference or voltage difference between the individual battery cells exceeds a reference value; a balancing time calculation step for calculating a balancing time for discharging the battery cell that exceeds the reference value; and a balancing operation step for discharging the selected battery cell when the battery cells are under charge or are at rest or when a discharge current of the battery cells is smaller than a reference current.

The invention discloses an automobile engine start control system and a control method thereof. The automobile engine start control system comprises an ignition key, a starting motor, a storage battery, a starting relay, an engine electric control unit, an automatic gearbox control unit and an automobile body controller, wherein the starting relay is electrically connected with the starting motorand the storage battery respectively; the engine electric control unit and the automatic gearbox control unit are respectively connected with the automobile body controller via a CAN (controller areanetwork) bus; and the starting relay and the ignition key are connected with the automobile body controller. The control method of the automobile engine start control system is characterized in that a BCM (body control module) obtains an engine speed signal and the gear position of a gearbox and carries out logical judgment according to the engine speed and the gear position of the gearbox so as to control the starting relay to be closed or opened and further control the starting motor to be started. The automobile engine start control system and the control method thereof provided by the invention have the advantages of realizing intelligent engine start control, guaranteeing the safety of vehicles and users when the engine is started, and providing protection for the starting motor and the storage battery.

The invention provides a battery charging control method and device and an automobile. The method includes: acquiring a status parameter of a battery, and according to the status parameter, acquiring an actual relationship curve for internal resistance and number of charging-discharging times of the battery within a preset time, which is a time interval from an automobile startup moment to a preset moment; comparing the actual relationship curve and a preset relationship curve; if the actual relationship curve is not in a preset range of the preset relationship curve, updating a preset charging quantity threshold of the battery; according to the status parameter, acquiring a quantity value of the battery; comparing the quantity value of the battery to the preset charging quantity threshold; according to comparison results, determining whether or not a generator charges the battery. The battery charging control method and device has the advantages that the preset charging quantity threshold of the battery is flexibly adjusted according to the status features of the battery, deep discharging of the battery is effectively avoided, the battery is kept running in the optimal state and the service life of the battery is prolonged.

The invention relates to the field of electric vehicles, particularly to an electric quantity control device and method of a hybrid energy storage system electric vehicle. The control device comprises connecting a diode and a contactor between a lithium battery and a super capacitor, and the breakover direction of the diode is that electricity can only flow from the battery to the super capacity. The control device also comprises a sensing device for collecting various states of the electric vehicle and a control system which can control various parts of the electric vehicle according to information transmitted by the sensing device, wherein the sensing device collects various states of an engine in real time and transmits the states to the control system, and the control system compares and judges the states with preset values to control various parts to work and accordingly achieve electric quantity control. The electric quantity control device of the hybrid energy storage system electric vehicle can reasonably distribute the electric quantity of an energy storage system and an APU (auxiliary power unit) system to enhance the integral dynamic performance, improve the comprehensive fuel saving rate and reduce the energy consumption and discharging, and meanwhile, prolong the service life of the power battery and improve the electricity efficiency and the operating reliability of the power battery.

The invention discloses an electric bicycle, a control device and a method thereof. The control device comprises a cell sensor module, a PWM (Pulse Width Modulation) control module and a motor drive module, wherein the cell sensor module is used for detecting cell power; the motor drive module is used for driving a motor; and the PWM control module comprises a first voltage judging unit, an accelerate starting unit, a current-limitation judging unit, an undervoltage judging unit and a PWM set-value regulating unit. The invention has the advantages that by reducing starting current and judging the voltage value of the cell power, when judging that the cell voltage dropping variation is greater than a threshold value, the increased proportion of current is reduced immediately, and the voltage drops into a normal range and is finally retained on an undervoltage point. The invention ensures that the electric bicycle can continually run in a state with slightly lower current, an endurance mileage is effectively increased, and cell deep discharge is avoided so that the cell life is prolonged at the same time.

The invention relates to automotive electric balance technology, in particular to real-time control method and device for automotive electric balance. The method includes the steps of firstly, acquiring real-time electric quantity of a storage battery; secondly, judging whether the storage battery needs to be charged or not according to the real-time electric quantity of the storage battery; thirdly, if yes, acquiring real-time load of an engine; fourthly, judging whether the engine is able to drive a generator to operate or not according to the real-time load of the engine; if yes, determining that the generator needs to operate and going to next step; fifthly, allowing the generator to operate; sixthly, acquiring real-time power of the generator and real-time electric consumption of an automobile; seventhly, judging decreasing or increasing the power of the generator is needed or not according to the real-time power of the generator and the real-time electric consumption of the automobile, and executing. Start and stop of the generator and operating efficiency thereof are controlled through the controller, so that real-time electric balance of the automobile is maintained.

A method of preventing deep discharge of the battery pack (1′) with series-connected cell groups (2a, 2b) by polarity reversal of an individual weakest cell (3), includes a difference measurement step which is repeated over time for detecting an event indicative of a probable reversal of polarity in which the change over time of the voltage difference between two cell groups (2a, 2b) having identical numbers of cells is checked to determine if the change in the voltage difference has exceeded an amount corresponding to a difference threshold value which reliably distinguishes a fast polarity reversal of an individual weakest cell (3) in exactly one cell group (2a, 2b) from the slow fluctuation of the voltage difference between two cell groups (2a, 2b) during an ordinary discharge characteristic curve without polarity reversal of an individual weakest cell (3); and a battery pack (1′) and a battery-powered hand-held power tool (7) with a monitoring circuit (5′) for implementing the method.

The invention discloses a storage battery capacity predication method based on a multi-factor grey correlation model. The storage battery capacity predication method based on the multi-factor grey correlation model comprises measuring the terminal voltage, the internal resistance and capacity values of a storage battery by four times in an interval mode during discharging of the storage battery; measuring the terminal voltage and the internal resistance at a fifth time; performing increasing iteration on a weighting parameter with the terminal voltage and the internal resistance serving as predication objects; obtaining predicating values of the terminal voltage sequentially through a GM (1,1) grey model; obtaining differences between the predicating values and the terminal voltage in the fifth time and selecting weighting parameter values of minimum values of absolute values of the differences; selecting the terminal voltage and the internal resistance to serve as connected factors to construct a GM (1,N) model; enabling a final weighting parameter value to be an average number of the two weighting parameter values; substituting the average weighting parameter value and measuring data of the first four times and obtaining remaining volume of the storage battery. The storage battery capacity predication method based on the multi-factor grey correlation model has the advantages of being easy to achieve, good in instantaneity and high in prediction accuracy, achieving the predication with only a small amount of data, avoiding battery damage caused by deep discharging in a traditional method and effectively improving the service life of the storage battery.

A battery control method includes: receiving a reprogramming request from a diagnostic device located outside of a vehicle to reprogram software of one or more electronic control units (ECUs) of the vehicle; performing reprogramming of the one or more ECUs or recharging of an auxiliary battery according to a number of the ECUs to be reprogrammed and whether or not a state of charge (SOC) of the auxiliary battery exceeds a critical value varied depending on the number of the ECUs to be reprogrammed; and sending a signal informing of the reprogramming or a warning signal associated with the recharging to the diagnostic device.

The invention discloses a new energy vehicle low-voltage battery power-supplying circuit and a working method thereof, comprising the following steps: a current collecting terminal of a battery current collecting module is connected with a current collecting terminal of the low-voltage battery; a current output terminal of the battery current collecting module is connected with a current input terminal of a vehicle controller; the current collecting terminal is connected with a current input terminal of the vehicle controller; the voltage acquisition terminal of the battery voltage acquisitionmodule is connected with the voltage acquisition terminal of the low-voltage battery, and the voltage output terminal of the battery voltage acquisition module is connected with the voltage input terminal of the vehicle controller. The temperature acquisition terminal of the battery temperature acquisition module is connected with the temperature acquisition terminal of the low-voltage battery, and the temperature output terminal of the battery temperature acquisition module is connected with the temperature input terminal of the vehicle controller. The invention can avoid the deep dischargeof the low-voltage battery, cause irreversible damage to the battery, is favorable for the whole service life of the battery to be in a shallow charging and shallow discharging state, greatly prolongsthe service time of the battery, and reduces the service cost and maintenance cost of the vehicle owner.

A low-voltage battery supplemental circuit working method for new energy vehicle includes such step as connecting current collecting end of battery current collecting module with current collect end of low-voltage battery, connecting current output end of battery current collecting module with current input end of whole vehicle controller. The voltage acquisition terminal of the battery voltage acquisition module is connected with the voltage acquisition terminal of the low-voltage battery, and the voltage output terminal of the battery voltage acquisition module is connected with the voltageinput terminal of the vehicle controller. The temperature acquisition terminal of the battery temperature acquisition module is connected with the temperature acquisition terminal of the low-voltage battery, and the temperature output terminal of the battery temperature acquisition module is connected with the temperature input terminal of the vehicle controller. The invention can avoid the deep discharge of the low-voltage battery, cause irreversible damage to the battery, is favorable for the whole service life of the battery to be in a shallow charging and shallow discharging state, greatlyprolongs the service time of the battery, and reduces the service cost and maintenance cost of the vehicle owner.

The invention provides a battery SOH detection method, device and system, a medium and a program product. The method comprises the following steps: acquiring a first moment that the voltage of a target battery is equal to a first voltage threshold value and a second moment that the voltage of the target battery is equal to a second voltage threshold value from a target duration according to the voltages of the target battery at each acquisition moment within the target duration; according to the working condition of the target battery at the first moment and the working condition of the target battery at the second moment, acquiring the variation of the electric quantity of the target battery from the first moment to the second moment; and according to the variable quantity of the electric quantity and the mapping relationship between the variable quantity of the electric quantity and SOH, obtaining the healthy state SOH of the target battery, wherein the mapping relationship is obtained based on the working conditions of sample batteries which are in different SOH states and have the same type as the target battery between the first voltage threshold value and the second voltage threshold value. According to the invention, the SOH of the battery in the working process can be obtained in real time.

The invention relates to an automotive electric energy management technology, in particular to a method and device for managing a low-voltage power supply process of a vehicle and a computer storage medium implementing the method. The method for managing the low-voltage power supply process of the vehicle comprises the following steps that if state information of a low-voltage battery is available, a first operation strategy is determined based on the state information, wherein the first operation strategy involves that when the state information indicates electricity shortage of the low-voltage battery, a vehicle-mounted DC-DC module charges the low-voltage battery and/or supplies power to a low-voltage load on the vehicle; if the state information is unavailable, a second operation strategy is determined based on the supply voltage of the low-voltage battery to a low-voltage electric energy management module, wherein the second operation strategy involves that when the supply voltageis smaller, the vehicle-mounted DC-DC module charges the low-voltage battery.

The invention provides a solar sun-shading device which is used for sun shading in an automobile and comprises a first sun-shading plate, a second sun-shading plate, a sliding rail and a driving rotating shaft, the first sun-shading plate and/or the second sun-shading plate are solar cell sun-shading plates, the first sun-shading plate slides along the sliding rail, the driving rotating shaft is arranged at one end of the sliding rail. The driving rotating shaft comprises a shell, a sliding driving system and an angle driving system, the sliding driving system and the angle driving system are arranged in the shell, the sliding driving system controls horizontal movement of the first sun shield and the second sun shield, and the angle driving system controls the sliding rail to rotate along the driving rotating shaft. The invention further provides a vehicle front windshield sun-shading method. The front end and the rear end can be adjusted to be opened and closed according to the needs of passengers in the automobile, the front gear is used for shading, even if the automobile is parked, electric quantity can be provided for a storage battery and electric control equipment in the automobile while the front gear is used for shading, and the automobile is economical, environmentally friendly and convenient to operate.

The present invention proposes a method for operating a hearing device which prevents battery leakage, especially in the case when the hearing device 1 is powered by a mercury-free battery 2. The method comprises monitoring a supply voltage of at least one of a plurality of electronic units 7, 8, 9 of the hearing device 1, initiating a low battery leakage shutdown state when a low supply voltage condition is identified based on the monitoring, wherein the initiating a low battery leakage shutdown state includes activating at least one power gate 10 to disconnect at least one of the plurality of electronic units 7, 8, 9 from the power supply when entering the low battery leakage shutdown state, and discharging a buffer capacitor 4 provided for stabilising the battery voltage. Moreover, a hearing device 1 optimised for being powered by a mercury-free battery 2 is provided.