Disclosed herein is a method of: providing a circuit having: a rechargeable pouch cell battery comprising lithium and an electrically insulating coating, a first electrical lead in contact with the coating at a first location on the battery, a second electrical lead in contact with the coating at a second location on the battery, a tuning capacitor in parallel to the battery, and an impedance matching capacitor in series with the battery and the tuning capacitor; placing the battery in a magnetic field; applying a radio frequency voltage to the circuit; and detecting a .sup.7Li nuclear magnetic resonance signal in response to the voltage.

An energy storage unit for a motor vehicle battery is provided, having an energy store, particularly configured as a battery cell module, for storing and delivering electric power. A measuring device measures electrical properties of the energy store. An evaluation unit, connected to the measuring device, ascertains the operational status of the energy store from the measurement results of the measuring device. An indicator unit is connected to the evaluation unit for depicting the operational status of the energy store. By ascertaining and depicting the operational status and not just the state of charge of the energy store, it is possible to dispense with separate complex measurements when fitting the energy store, so that an energy storage unit can be checked quickly and efficiently when fitted into a motor vehicle.

An apparatus and a method for determining a defect of a battery cell are disclosed. The defect determination apparatus according to an aspect includes: a temperature measurement unit configured to measure an aging temperature of the battery cell; a period determination unit configured to determine an aging period of the battery cell; an SOC determination unit configured to measure and determine a state of charge (SOC) of the battery cell at the start of aging; a voltage measurement unit configured to measure open circuit voltages (OCVs) of the battery cell at the start of aging and at the end of aging; and a defect determination unit configured to determine whether the battery cell is defective based on the aging temperature, the aging period, the SOC at the start of aging, the OCV at the start of aging and the OCV at the end of aging.

A multi-tasking end effector system includes a base frame connected to a robot arm of a robot. A first shaft is rotatably supported on the base frame. A first pin-wheel assembly is rotatably mounted to the shaft at a first end of the base frame. Multiple first die assemblies are mounted to the first pin-wheel assembly. A second pin-wheel assembly is rotatably mounted to the shaft at a second end of the base frame. Multiple second die assemblies are mounted to the second pin-wheel assembly and individually oriented in mirror image configuration to one of the multiple first die assemblies. An index motor rotates the first shaft and co-rotates paired and mirror image die assemblies. First and second tab-bending actuators mounted to the base frame are operated to bend opposed cell tabs of a battery cell positioned between the first and second pin-wheel assemblies.

A computer-implemented method for the machine learning of a model for classifying batteries into two categories: functional or defective, the method comprising the following steps: acquiring, on a set of batteries of the same type, a group of measurements characteristic of the operation of a battery, carrying out complete cycling of each battery of the set and measuring at least one curve from among a charge curve or a discharge curve of the battery, determining, for each battery, a label of belonging to the functional or defective category by comparing at least one measured curve with a reference curve characterizing the correct operation of the battery, and carrying out supervised training of a model for classifying a battery according to the two categories based on the groups of measurements and on the label of belonging to one of the two categories.

A method for identifying a cell quality during cell formation includes: conducting a beginning of life cycling following an initial cell formation charge of multiple cells; collecting and preprocessing a discharge data set generated by one of the multiple cells during the beginning of life cycling; calculating a statistical variance from the discharge data set identifying an estimated probability of meeting a target cell usage time; and projecting a life span of the multiple cells.

The present invention provides a battery probing module, for testing a battery defined with a contact surface having a first electrode area and a second electrode area with different polarities. The battery probing module comprises a frame and a plurality of probe units. The frame has a top plate and a bottom plate opposite to the top plate. Each of the plurality of probe units comprises a base, a first probe, and a plurality of second probes. The base is defined with a top surface and a bottom surface deflectably fixed to the top surface by a fixing unit. The first probe and the plurality of second probes protrude from the bottom surface for contacting the first electrode area and the second electrode area respectively. Wherein the first probe is within a periphery surrounded by the plurality of second probes in a vertical direction of the bottom surface.

A process and system for measuring internal faults in an electrochemical cell is provided. The process for detecting an internal fault in an electrochemical cell includes measuring a voltage difference or a rate of change in voltage difference between a common terminal of a first electrochemical cell and a second electrochemical cell. The first electrochemical cell or second electrochemical cell is accepted based on the measuring, or first electrochemical cell or second electrochemical cell is rejected based on the measure of the internal fault of the electrochemical cell.

A diagnostic device for a secondary battery having a structure in which positive electrodes and negative electrodes are alternately arranged includes an electronic control unit. The electronic control unit is configured to acquire a first resistance value indicating a magnitude of electrical resistance of the secondary battery, compress at least a part of the secondary battery, acquire a second resistance value indicating a magnitude of electrical resistance of the secondary battery after the compression, determine, using the first and second resistance values, whether an amount of decrease in electrical resistance of the secondary battery by the compression is greater than a predetermined value, and determine whether an increase in resistance due to distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery using a result of the determination.

A method and a device for testing a battery state determines if a battery is faulty. A first impedance test is conducted to determine the internal resistance of the battery, wherein the battery is energized with an electrical current flow with a certain frequency and a resulting voltage response of the battery is measured. A load high-current test of the battery with a test pulse HRD test is conducted next. Then, a second impedance test is conducted. The measurement results of the tests are recorded and stored, and then evaluated by arranging such results offset in relation to one another, in such a way that the battery state can be derived therefrom, in particular whether the battery is faulty.