LG Energy Solution Patente

The present disclosure relates to a battery system and a diagnose method of a link capacitor according to an operation of a pre-charge circuit, and a battery system according to the present disclosure includes a battery pack; two terminals connected to an external device including a link capacitor connected in parallel to the battery pack; a pre-charge circuit including a pre-charge resistor and a pre-charge relay connected in series between one terminal of the battery pack and one of two terminals; a main relay connected in parallel to the pre-charge circuit; and a battery management system (BMS) that measures the pack voltage of the battery pack and the link voltage between two terminals, controls the turn-on operations of the pre-charge relay and the main relay, calculates a reference power amount estimated to have been supplied to the pre-charge resistor during the driving time of the pre-charge circuit, calculates a target power amount supplied to the pre-charge resistor during the driving time of the pre-charge circuit, and diagnoses the state of the link capacitor as one of a plurality of fault states based on a comparison result of a target power amount and a threshold power amount according to the reference power amount and a comparison result of the pack voltage and the link voltage.

The present disclosure relates to a battery module including: a cell assembly including a plurality of battery cells; and a module frame configured to store the cell assembly and including a first frame and a second frame coupled such that one side of each at least partially overlaps the other.

A battery cell assembly according to an exemplary embodiment of the present disclosure includes a plurality of battery cells, and a potting unit disposed outside the plurality of battery cells and interposed between the plurality of battery cells and configured to fix the plurality of battery cells. A battery cell assembly according to the present disclosure may not include a separate housing having a receiving space for receiving a plurality of battery cells.

The present disclosure relates to a battery box, and the battery box according to an aspect of the present disclosure includes a battery cell including an electrode assembly extended in an direction, an outer casing film accommodating the electrode assembly and a cap coupled to the outer casing film and shielding a side of the electrode assembly in a length direction; and a cover frame supporting the battery cell and having an opening, wherein the outer casing film includes an accommodation portion surrounding the electrode assembly; and a venting portion present on a side of the accommodation portion, and wherein the venting portion is positioned facing the opening.

According to an embodiment of this document, a battery diagnosis device includes a memory configured to store at least one instruction and at least one processor configured to identify a first input voltage profile including a voltage profile measured by supplying a current having a specified waveform to a battery cell, input the first input voltage profile into a first model which encodes and then restores the first input voltage profile, and diagnose a state of the battery cell based on a feature vector identified based on the first model.

Embodiments provide an electrode assembly. The electrode assembly includes: a positive electrode including a positive electrode current collector, a first positive electrode active material layer on the positive electrode current collector, and a second positive electrode active material layer spaced apart from the first positive electrode active material layer with the positive electrode current collector therebetween; a negative electrode including a negative electrode current collector, a first negative electrode active material layer on the negative electrode current collector, and a second negative electrode active material layer spaced apart from the first negative electrode active material layer with the negative electrode current collector therebetween; a separator between the positive electrode and the negative electrode; and a variable resistance structure in contact with the positive electrode and the negative electrode, the variable resistance structure includes a conductive foil and a variable resistance film on the conductive foil, and the variable resistance film includes a transition metal oxide.

Embodiments provide a battery cell assembly. The battery cell assembly includes a first battery cell including a first positive electrode lead and a first negative electrode lead, a second battery cell including a second positive electrode lead and a second negative electrode lead, and a first integrated circuit assembly coupled to the first and second battery cells and including a first insulating frame, and the first insulating frame includes a first slit penetrated by the first negative electrode lead of the first battery cell, a second slit penetrated by the second positive electrode lead of the second battery cell, and a third slit penetrated by the first negative electrode lead of the first battery cell.

According to an embodiment of this document, a battery diagnosis device includes a memory storing at least one instruction and at least one processor executing the at least one instruction, and the at least one processor is configured to identify a first input voltage profile including a voltage profile measured by supplying a current having a specified waveform to a battery cell, input the first input voltage profile into a first model which performs encoding and then restoration the first input voltage profile, and diagnose a state of the battery cell based on a feature vector identified based on the first model.

A secondary battery is provided including: a first group of unit electrodes and a second group of unit electrodes stacked in a first direction; first electrode tabs extending from one end of the first group of unit electrodes and joined to each other; second electrode tabs extending from one end of the second group of unit electrodes and joined to each other; and an electrode lead electrically connected to the first electrode tabs and the second electrode tabs, wherein the first electrode tabs comprise a first merge part, a first tab ending part extending substantially parallel to an extension direction of the first group of unit electrodes, and a first connection part connecting the first merge part and the first tab ending part, and the first merge part and the first connection part are connected in a V-shape.

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