244results about "Secondary cells testing" patented technology

A battery heating system includes: a temperature monitoring circuit configured to output a temperature monitoring signal; a voltage conversion circuit configured to receive a first voltage that is input by a power supply or a second voltage that is input by a to-be-heated battery; and a control circuit configured to receive the temperature monitoring signal and output a control signal. The voltage conversion circuit is configured to perform boosting processing or bucking processing on the first voltage based on the control signal or perform boosting processing or bucking processing on the second voltage based on the control signal to enable the to-be-heated battery to receive a charging current from the power supply in a first time segment using the voltage conversion circuit and the to-be-heated battery to output a discharging current to the power supply in a second time segment using the voltage conversion circuit.

There is provided a charge / discharge inspection system that enables easy maintenance such as cleaning the tips of probes or replacing defective probes without a complex configuration. The charge / discharge inspection system includes: a battery inspection unit of a charge / discharge inspection apparatus; a tray that is capable of containing a probe unit, a charge / discharge power supply unit, and a charge / discharge power supply-integrated probe unit in a storage part, is conveyed with one of them contained in the tray, and is placed in the battery inspection unit; and a conveying apparatus that conveys the tray from the battery inspection unit to another location, or conveys the tray from another location to the battery inspection unit.

A method for detecting thermal runaway of a battery pack including a battery module in a master battery management system, the method comprising detecting a communication error with a slave battery management system that detects information on the battery module, if the communication error with the slave battery management system is detected, obtaining temperature of a master board from a temperature sensor located on the master board in which the master battery management system is installed, and detecting thermal runaway of the battery pack using the temperature of the master board.

This invention discloses a battery temperature and strain detection device and battery pack, relating to the field of battery monitoring technology. The device includes a light source, a controller, and a detection optical fiber. The detection optical fiber is connected between the light source and the controller to receive and transmit light to the controller. The controller is configured to determine a first wavelength shift caused by temperature influence when light flows through a fiber optic grating in the detection optical fiber, and a second wavelength shift caused by strain influence when light flows through a photonic crystal fiber in the detection optical fiber. Based on the first and second wavelength shifts, and the temperature and strain sensitivity coefficients of the fiber optic grating and the photonic crystal fiber, the temperature change and strain change of the battery are determined. Based on the temperature change, strain change, and preset temperature and strain reference values, the battery temperature and strain values ​​are determined. This solution improves the ability to detect battery temperature and strain.

Provided is a system for predicting a time of occurrence of gas emission of a battery cell including a platform portion having a sealed portion and disposed on at least one side of a pouch-type battery case and an electrode lead protruding from an end of the platform portion, the system including a storage unit for collecting data on a time of occurrence of gas emission according to a width of a remaining sealed portion; a measurement unit for periodically measuring the width of the remaining sealed portion of the battery cell to be measured; and a determination unit for predicting the time of occurrence of gas emission of the battery case to be measured by comparing the measured width of the remaining sealed portion with the collected data.

To provide a technology that can estimate the salt concentration of the electrolyte in a secondary battery. [Solution] The method for estimating the salt concentration of the electrolyte of a secondary battery disclosed herein includes a capacity acquisition step S1 for acquiring the capacity of a secondary battery to be estimated, a discharge time acquisition step S2 for acquiring the discharge time when the secondary battery is discharged under predetermined conditions, and a salt concentration estimation step S3 for estimating the salt concentration of the electrolyte of the secondary battery based on the acquired capacity of the secondary battery, the acquired discharge time, and a table recording the relationship between the capacity of the secondary battery, the discharge time, and the salt concentration of the electrolyte of the secondary battery to be estimated.

Systems and methods for estimating battery degradation of a battery energy storage system (BESS) are disclosed. An iterative process is executed over a pre-defined time period divided into iterations. For each iteration, an average temperature of the BESS is determined by inputting a state of health (SOH) and charge rate into an average temperature look-up-table (LUT). The SOH for the next iteration is determined by inputting the determined average temperature into a set of cell degradation equations. The charge rate for the next iteration is derived from a usage profile which defines the charging and discharging cycles over the pre-defined time period and includes power and SOC over the pre-defined time period. The SOH of the BESS over the pre-defined time period may then be displayed on a user interface.

A monitoring system of monitoring a battery manufacturing process is provided. The system includes: a first server configured for storing a first coordinate-related data set in which coordinate data indicating lengthwise positions on an electrode are associated with inspection data and / or measurement data obtained from the positions of the electrode being subject to a plurality of manufacturing sub-processes, and an identification data set including an electrode identifier, ID, identifying a respective sectional electrode that has been obtained by cutting off a lengthwise section from the electrode, a memory storing instructions, and at least one processor configured to execute the instructions stored in the memory to perform operations of: 1) associating an electrode ID selected from the identification data set with the coordinate data of the first coordinate-related data set representing the lengthwise section of the electrode from which the sectional electrode identified by the electrode ID has been obtained, and 2) generating monitoring data on the battery manufacturing process based on the coordinate data associated with the electrode ID.

A method of determining deformation of a battery includes obtaining a first image by scanning a cross-section of a battery cell in one direction, inputting the first image into an artificial neural network model trained to distinguish a plurality of parts of the battery cell in the first image and obtaining coordinates corresponding to each of the parts, and generating a second image in which at least some of the coordinates are aligned according to a winding sequence related to the battery cell. Deformation of the battery cell is determined based on the second image.

This invention provides a secondary battery system that improves the accuracy of estimating the degradation of secondary batteries. [Solution] A secondary battery system for estimating the degradation of a secondary battery, comprising: an acquisition unit that acquires the internal resistance, internal pressure, and temperature of a battery cell; a first estimation unit that estimates the degradation of the secondary battery based on the internal resistance when the temperature is below a first threshold; a second estimation unit that estimates the degradation of the secondary battery based on the internal pressure when the temperature is above a second threshold; and a third estimation unit that estimates the degradation of the secondary battery based on both the internal resistance and the internal pressure when the temperature exceeds the first threshold and is below the second threshold.

A simulation device according to an embodiment disclosed in this document includes a model generation unit configured to generate a shape model of a battery cell reflecting deformation of an electrode of the battery cell, a condition setting unit configured to set an electrolyte condition regarding whether an electrolyte is included in a deformed portion of the shape model of the battery cell and an operating condition of the battery cell, and a simulation unit configured to simulate a lithium precipitation state of the battery cell based on the shape model of the battery cell, the electrolyte condition, and the operating condition.

A device for detecting a battery condition may include a storage device storing a battery model that models a voltage change and an internal impedance of a battery as an electrical circuit, and a control device configured to estimate a distribution status of lithium ions in a positive electrode active material of the battery, detect a distortion zone remaining in a boundary portion of two identical-phase regions in the positive electrode active material based on the distribution status, estimate an overvoltage caused by the distortion zone, correct the battery model by using a correction parameter corresponding to the overvoltage, and estimate a condition of the battery by using the battery model.

A device for measuring a flow rate of gas in a secondary cell according to an embodiment of the present disclosure includes a chamber accommodating the secondary cell, and a pipe-shaped flow rate measurement unit connected to an outlet of the chamber.

A method to test a battery pack in a vehicle comprises determining the vehicle is driven in electric vehicle and regenerative braking modes with respective output rates continuously for threshold amounts of time. The method includes determining first and second sets of battery voltage values for multiple battery pack components in the battery pack as the vehicle is driven in the electric vehicle mode and the regenerative braking mode, respectively. Each first and second set of battery voltage values includes a value for each battery pack component in the multiple battery pack components. The method includes outputting an indicator regarding a state of the battery pack based on differences in pairs of battery voltage values among the first or second sets of battery voltage values. Each pair of battery voltage values includes a maximum and minimum battery voltage value from each first or second sets of battery voltage values.

Disclosed are an apparatus and a method for generating an LFP battery model. The apparatus for generating an LFP battery model according to the present disclosure includes a lithium state recording unit that records a state of lithium (Li) in a positive electrode active material of a lithium iron phosphate (LiFePO4, LFP) battery according to charging or discharging of the LFP battery; and a battery model generating unit that generates a battery model of the LFP battery based on the recorded state of lithium in the positive electrode active material, wherein the battery model generating unit may generate a battery model by modeling the LFP battery with multiple resistors and capacitors reflecting the state of lithium in the positive electrode active material.

The application discloses a one-out-two automatic assembling process and production line for a power battery cover plate. The power battery cover plate comprises a top cover sheet, a plastic sheet, an explosion-proof valve and a pair of pole columns. The plastic sheet is covered on the inner surface of the top cover sheet. The explosion-proof valve is welded at the explosion-proof valve hole of the top cover sheet. The pole column is welded at the pole column hole of the top cover sheet. A pre-compressed sealing ring is arranged between the pole column and the top cover sheet. The one-out-two automatic assembling process comprises the following steps which are sequentially executed: an explosion-proof valve assembling step, a pole column assembling step, a plastic sheet assembling step, an air tightness detection step and a resistance detection step. In the explosion-proof valve assembling step or the pole column assembling step, each carrier carries two top cover sheets to pass through the respective workstations of the explosion-proof valve assembling or the pole column assembling. The two top cover sheets are arranged side by side in the direction perpendicular to the conveying direction. The one-out-two automatic assembling process for the power battery cover plate has high working efficiency.

A system for diagnosing a power supply distribution circuit that distributes power supplied from a DC-DC converter and an auxiliary battery to a plurality of loads, the system comprising: a plurality of switches provided between the DC-DC converter and the auxiliary battery and the loads; a switching unit that switches a connection state of the switches; and a diagnosis unit that diagnoses the power supply distribution circuit based on the connection state of the switches and a change in voltage and current in the power supply distribution circuit.

A deformation analysis device for a secondary battery and a non-destructive analysis method by which electrode deformation of a secondary battery may be diagnosed using a computed tomography (CT) image, the method including the steps of obtaining an image by performing computed tomography (CT) on the secondary battery, generating an intensity graph using brightness differences from the image, measuring a core peak FWHM (full width at half maximum) or a core diameter change value from the intensity graph, and determining that the electrode assembly is deformed if the measured core peak FWHM is greater than a peak reference value or the core diameter change value is greater than a diameter reference value.

A secondary battery system that estimates deterioration of a secondary battery includes: an acquisition unit configured to acquire an internal resistance, an internal pressure, and a temperature of a battery cell; a first estimation unit configured to estimate the deterioration of the secondary battery based on the internal resistance when the temperature is equal to or lower than a first threshold value; a second estimation unit configured to estimate the deterioration of the secondary battery based on the internal pressure when the temperature is equal to or higher than a second threshold value; a third estimation unit configured to estimate the deterioration of the secondary battery based on both the internal resistance and the internal pressure when the temperature is higher than the first threshold value and lower than the second threshold value.

A detection apparatus and a battery production device are described. The detection apparatus includes a support frame, a ray source, a probe, and a carrying platform. The support frame includes a support arm, the ray source and the probe are both connected to the support arm, with the probe facing an exiting port of the ray source, and the carrying platform is located between the ray source and the probe, wherein the ray source and the probe are rotatable about a same rotation axis, and a rotation direction of the ray source is the same as that of the probe, such that during rotation, the probe remains facing the exiting port of the ray source and the carrying platform is located between the ray source and the probe.

A test system comprises a test circuit board, a test device, a lower computer, and an upper computer. The test circuit board includes a test circuit, the test circuit comprising multiple main lines arranged side by side, one end of each of the main lines being used to connect with a positive electrode or a negative electrode of each battery cell of the battery module, and the other end of each of the main lines being connected with a first branch and a second branch. The lower computer controls a first branch connected to one of the main lines to be electrically conductive to a positive electrode of the test device and a second branch connected to another one of the main lines to be electrically conductive to a negative electrode of the test device. The upper computer controls the lower computer and reads parameter information for the test device.

An apparatus and method for generating an LFP battery model are disclosed. The apparatus for generating an LFP battery model according to the present disclosure includes a lithium state recording unit that records a state of lithium (Li) in a positive electrode active material of a lithium iron phosphate (LiFePO4, LFP) battery according to charging or discharging of the LFP battery, and a battery model generating unit that generates a battery model of the LFP battery based on the recorded state of lithium in the positive electrode active material, wherein the battery model generating unit can generate the battery model by modeling the LFP battery with a plurality of resistors and capacitors that reflect the state of lithium in the positive electrode active material.

The present disclosure relates to a device and a method for detecting an internal resistance of a battery. An internal resistance detection device according to embodiments includes: a measuring device configured to measure a state value of a battery; and a control device configured to determine a state of charge (SOC) of the battery based on the state value, estimate a lithium ion distribution state within a positive electrode active material of the battery based on the SOC, determine a detection section depending on the lithium ion distribution state, and determine an internal resistance value of the battery based on the state value measured within the detection section.

A battery modeling device according to an embodiment disclosed in this document includes: an information acquisition unit configured to acquire an image of a battery and battery information including information on the number of a plurality of tabs included in the battery, an edge information generation unit configured to generate edge information on the basis of the image of the battery, and a controller configured to extract pixels corresponding to the plurality of tabs on the image on the basis of the edge information and the battery information, and modeling the plurality of tabs of the battery on the basis of the pixels.

Disclosed herein are a method and system for detecting inter-cell short circuits in secondary batteries. The system includes a voltage measurement unit including a probe that comes into contact with a cell of a secondary battery to measure an inter-cell voltage, a short-circuit control unit configured to control an inter-cell short circuit, and an inter-cell short-circuit detection unit configured to measure a first voltage between a first cell and a second cell in the secondary battery, to create a short circuit between the first and second cells, to measure a second voltage between the first and second cells, to eliminate the short circuit between the first and second cells, to measure a third voltage between the first and second cells, and to determine whether a short circuit occurs between the first and second cells by using at least one of the first to third voltages.

A secondary battery system includes a secondary battery having an electrode body impregnated with an electrolytic solution containing metal ions. The secondary battery system measures an impedance of the secondary battery. The secondary battery system detects high-rate deterioration caused by uneven concentration of the metal ions in the electrolytic solution impregnated into the electrode body.

A method for inspecting a cell electrode and an apparatus thereof may be provided, wherein the apparatus for inspecting a cell electrode comprises a first imager configured to acquire an electrode image, a second imager configured to acquire a separator image, an image processor configured to align the acquired electrode image and the acquired separator image, and composite the electrode image and the separator image to generate a cell electrode image, an inspector configured to determine whether the cell electrode is defective using the composited cell electrode image and a controller configured to control the first imager, the second imager, the image processor, and the inspector.

The present invention relates to an apparatus and a method for detecting thermal runaway of a battery of an electric vehicle. The apparatus includes a plurality of battery cells connected in series through a high voltage (HV) line and a battery module including the plurality of battery cells. A plurality of main sense lines are electrically connected to the HV line between the plurality of battery cells to measure a voltage of each battery cell. A plurality of auxiliary sense lines are respectively connected to the HV line as an input line of the battery module and the HV line as an output line of the battery module to measure a voltage of the battery module.

Provided in embodiments of the present application are a battery appearance detection device and battery manufacturing equipment. The battery appearance detection device includes a bracket, a first photographing component, a second photographing component, and an identification device. The first photographing component is mounted on the bracket. The first photographing component is configured to capture an appearance photo of a first detected member. The second photographing component is mounted on the bracket. The second photographing component is configured to capture an appearance photo of a second detected member. The first detected member and the second detected member have different shapes. The identification device is signal-connected to the first photographing component and the second photographing component. The identification device is configured to: identify an appearance defect of the first detected member based on the photo captured by the first photographing component, and identify an appearance defect of the second detected member based on the photo captured by the second photographing component. The battery manufacturing equipment includes the battery appearance detection device.