Abstract: A battery circuit, comprising a power supply terminal, a first battery pack, a second battery pack, a voltage transformation unit, a first switch, a second switch and a grounding terminal, wherein a positive electrode of the first battery pack is connected to the power supply terminal, and a negative electrode thereof is connected to a positive electrode of the second battery pack; a negative electrode of the second battery pack is connected to the grounding terminal; a first terminal of the first switch is connected to the power supply terminal, and a second terminal thereof is connected to a first terminal of the second switch; a second terminal of the second switch is connected to the grounding terminal; the voltage transformation unit is connected between the first battery pack and the first switch. Also disclosed is a vehicle comprising the battery circuit.

Abstract: In a method of providing an early warning for a component of a device, a historical production data feature of the component during production of the component is obtained. Whether the historical production data feature of the component matches an early warning indicator is determined. The early warning indicator is determined by performing correlation analysis on sample production data of a plurality of component samples and sample operation fault data of the plurality of component samples to obtain production fault correlation data, and determining, when the production fault correlation data indicates a correlation between the sample production data and the sample operation fault data, the early warning indicator based on the sample production data correlated with the sample operation fault data. When the historical production data feature of the component matches the early warning indicator, early warning information for the component of the device is generated.

Abstract: The present disclosure relates to a method and apparatus for determining a state of charge (SOC) of a battery and a battery management system (BMS), so as to resolve a problem such as inaccurate estimation of the SOC. The method includes: acquiring state data of the battery, where the state data comprises current data and voltage data; determining each element parameter value in an equivalent circuit model of the battery based on the equivalent circuit model, error information, battery characteristic data, and the state data by using a recursive least square (RLS) prediction model; and determining an estimated value of the SOC of the battery based on the element parameter value in the equivalent circuit model, the state data, and the battery characteristic data according to a technique of an observer.

Abstract: A method for generating an electrochemical impedance spectrum for a battery includes: collecting, in a discharge state of a battery, battery discharge information of the battery periodically according to a preset collection interval, where the battery discharge information includes collection time, and current information and voltage information associated with the collection time; performing Fourier transform according to the collection interval and battery discharge information, to obtain multiple frequency-based first battery signals; determining a second battery signal from the multiple first battery signals, where the second battery signal includes a voltage signal greater than or equal to a preset voltage threshold; and determining an electrochemical impedance at a corresponding frequency according to the second battery signal, and constructing an electrochemical impedance spectrum according to all the electrochemical impedance.

Abstract: A method for determining a voltage inflection point of a cell core in a LFP battery includes: charging the LFP battery with a first current value and monitoring the State of charge (SOC) of the LFP battery, the first current value being greater than a predetermined threshold of current; if the SOC of the LFP battery is outside a predetermined detection range, charging the LFP battery with the first current value; if the SOC of the LFP battery is within the detection range, charging the LFP battery with a second current value, the second current value being less than the predetermined threshold of current; and detecting the voltage inflection point of various cell cores in the LFP battery according to parameter information of the various cell cores in the LFP battery in the process of charging where the SOC is within the detection range.

Abstract: A method of obtaining battery capacity, includes: acquiring a voltage-capacity curve of a battery; performing differentiation on the voltage-capacity curve to obtain a voltage differential-capacity curve; identifying wave crests in the voltage differential-capacity curve; calculating heights and widths between each wave crest and the adjacent wave trough on the left and the right; calculating a determination index p according to the heights and the widths; determining a voltage knee point in the voltage-capacity curve according to a wave crest with a minimum determination index; acquiring a reference capacity value corresponding to the voltage knee point in the voltage-capacity curve; after the battery reaches a full-charge state, acquiring charging electric energy of the battery for charging from the voltage knee point to the full-charge state; and obtaining a capacity of the battery based on a sum of the reference capacity value and the charging electric energy.

Abstract: A method for detecting a lithium plating state of a battery includes regularly collecting a voltage of a battery after the end of charging at a preset time interval after the battery is in an idle state, and associatively storing the collected voltage and a collection time as voltage data; constructing a time-differential voltage curve in a voltage-time coordinate system according to the voltage data; detecting whether a characteristic peak voltage exists in the time-differential voltage curve; and sending a warning message when detecting that the characteristic peak voltage exists in the time-differential voltage curve.

Abstract: A method for calculating a cell state includes: acquiring a first knee-point voltage threshold of a cell, a first knee-point electricity corresponding to the first knee-point voltage threshold, a second knee-point voltage threshold of the cell and a second knee-point electricity corresponding to the second knee-point voltage threshold; recording a first charging curve of the cell in real time; obtaining a target knee point according to the first charging curve, the first knee-point voltage threshold, and the second knee-point voltage threshold, and obtaining a target-knee-point electricity according to the first knee-point electricity or the second knee-point electricity; detecting the electricity of the cell until the charging is completed, and obtaining a charged electricity of the cell from the target knee point to the completion of charging; and obtaining the capacity of the cell according to the target-knee-point electricity and the charged electricity.

Abstract: A path determination method includes: obtaining current position information and destination position information of a target vehicle; determining a candidate path of the target vehicle according to the current position information and the destination position information; acquiring road condition information of the candidate path and reference vehicle information; determining first energy consumption information required to be consumed by the target vehicle to travel on the candidate path over a unit distance according to the road condition information and the reference vehicle information; and recommending the candidate path to the target vehicle according to the first energy consumption information.

Abstract: A battery circuit and a vehicle are disclosed. The battery circuit comprises a power supply terminal, a first battery pack, a second battery pack, a voltage transformation unit, a first switch, a second switch, a grounding terminal, and a control unit. A positive electrode of the first battery pack is coupled to the power supply terminal, and a negative electrode of the first battery pack is coupled to a positive electrode of the second battery pack; a negative electrode of the second battery pack is coupled to the grounding terminal; the voltage transformation unit is coupled between the negative electrode of the first battery pack and the second terminal of the first switch, and controls the first switch and the second switch to be connected or disconnected according to at least one of the temperature of the first battery pack, and the temperature of the second battery pack.

Abstract: A battery internal temperature information processing method, a computer device, and a storage medium that first acquire off-line testing data for off-line testing a battery module and construct an equivalent thermal network model from the off-line testing data, determine optimal model parameters of the equivalent thermal network model based on a multi-objective function fitting method; thereafter, a first battery internal temperature estimate of the battery of the vehicle at a first moment in actual operation of the vehicle is determined, in turn, based on the acquired initial state vector values of the battery of the vehicle, first operational data at a first moment in actual operation of the vehicle, and an equivalent thermal network model including the optimal model parameters.

Abstract: A battery circuit (e.g., in a vehicle) comprises a power supply terminal, a first battery pack, a second battery pack, a voltage transformation unit, a first switch, a second switch, a grounding terminal, and a control unit. A positive electrode of a first battery pack is coupled to the power supply terminal, and a negative electrode of the first battery pack is coupled to a positive electrode of a second battery pack; a negative electrode of the second battery pack is coupled to the grounding terminal; the first switch is coupled to the power supply terminal, the second switch is coupled to the grounding terminal; the voltage transformation unit is coupled between the first battery pack and the first switch and is configured to control an opening or closing of the first switch and the second switch according an output power and a power threshold of the battery circuit.

Abstract: A battery circuit (e.g., in a vehicle) includes a power supply terminal, a first battery pack, a second battery pack of a different type from the first battery pack, a voltage transformation unit, a first switch, a second switch, a grounding terminal, and a control unit. The first battery pack is connected to the power supply terminal and the second battery pack. The second battery pack is connected to the grounding terminal. The first switch is connected to the power supply terminal, the second switch, and the control unit. The second switch is connected to the grounding terminal and the control unit. A voltage transformation unit is connected between the first battery pack and the first switch. The control unit is configured to control closing or opening of the first and second switches according to at least one state-of-charge value of the first and second battery packs.

Abstract: A battery circuit comprises: a power source end, a first battery pack, a second battery pack, a voltage transformation unit, a first switch, a second switch and a ground end. A positive electrode of the first battery pack is connected to the power source end, and a negative electrode of the first battery pack is connected to a positive electrode of the second battery pack; a negative electrode of the second battery pack is connected to the ground end; a first end of the first switch is connected to the power source end, and a second end of the first switch is connected to a first end of the second switch; a second end of the second switch is connected to the ground end; and the voltage transformation unit is connected between the negative electrode of the first battery pack and the second end of the first switch.

Abstract: A battery circuit, comprising a power supply terminal, a first battery pack, a second battery pack, a voltage transformation unit, a first switch, a second switch and a grounding terminal, wherein a positive electrode of the first battery pack is connected to the power supply terminal, and a negative electrode thereof is connected to a positive electrode of the second battery pack; a negative electrode of the second battery pack is connected to the grounding terminal; a first terminal of the first switch is connected to the power supply terminal, and a second terminal thereof is connected to a first terminal of the second switch; a second terminal of the second switch is connected to the grounding terminal; the voltage transformation unit is connected between the first battery pack and the first switch. Also disclosed is a vehicle comprising the battery circuit.

Abstract: A warning method for battery thermal runaway includes: acquiring current temperature data of each temperature sensor arranged in a battery pack, current voltage data of each voltage sensor arranged in the battery pack, and current sensor disconnection data of each temperature sensor; calculating a number of occurrences of a primary feature at a current moment according to the current temperature data; calculating a number of occurrences of a secondary feature at the current moment according to the current voltage data and the current sensor disconnection data in a case that the number of occurrences of the primary feature is greater than 0; calculating a sum of the number of occurrences of the primary feature and the number of occurrences of the secondary feature at the current moment; and sending a warning for battery thermal runaway when the sum is greater than a preset feature number threshold.

Abstract: A method for determining a battery capacity, includes: acquiring a first inflection voltage, a first inflection electric power, a second inflection voltage, and a second inflection electric power of the battery, charging the battery and recording a first charging profile of the battery; determining a target inflection point of the battery according to the first charging profile; detecting the electric power until the charging is completed, acquiring a first charged electric power of the battery when the battery is charged to a first inflection point, and acquiring a second charged electric power of the battery when the charging is completed; and when the target inflection point includes the first inflection point, calculating a current capacity of the battery according to the first inflection electric power, the first charged electric power, and the second charged electric power. The first inflection voltage is greater than the second inflection voltage.

Abstract: A battery management method includes: obtaining a current high-voltage inflection point power value of each cell; obtaining a current historical cumulative balance power value of each cell; obtaining a current equivalent self-discharge value of each cell through calculation; obtaining an equivalent self-discharge value at a previous moment of each cell; obtaining a target equivalent self-discharge value of each cell through calculation; determining a maximum target equivalent self-discharge value and a minimum target equivalent self-discharge value; obtaining a maximum equivalent self-discharge rate and a minimum equivalent self-discharge rate through calculation; and when a difference between the maximum equivalent self-discharge rate and the minimum equivalent self-discharge rate is greater than a preset threshold, managing a target cell corresponding to the maximum target equivalent self-discharge value.

Abstract: The present disclosure relates to the technical field of batteries, and provides a sampling device, a battery management system, and a vehicle. The sampling device includes multiple core function regions, an auxiliary function region, and a terminal connector. The multiple core function regions are configured to process information of a battery. The auxiliary function region has wiring arranged therein, and is configured to transmit a signal corresponding to the information. The multiple core function regions are cascaded through the wiring.

Abstract: A charging control method for a vehicle having an electric function includes: vehicle usage habit data of a user in preset time is read. The usage habit data includes a charging time point of each charging and driving mileage of each driving of the vehicle in the preset time. A current remaining state of charge of the vehicle at a current moment is detected. An estimated need state of charge of the vehicle is determined based on the usage habit data. Whether the vehicle needs charging is determined based on the estimated need state of charge and the current remaining state of charge. The present disclosure further provides a charging control apparatus, a vehicle, and a computer-readable storage medium.