LG Energy Solution Patente

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Example embodiments of the present technology provide a roll map generating method. The roll map generating method includes collecting coordinate data of an electrode sheet and measurement data of the electrode sheet, and generating compressed measurement data based on the measurement data, in which the measurement data is collected by scanning sections of the electrode sheet.

The present disclosure provides a device for diagnosing resistance characteristic, comprising:an acquisition unit that acquires a charging or discharging profile in a specified charge/discharge cycle of a unit cell;a generation unit that generates a capacity voltage differential data representing a capacity voltage differential value(dQ/dV) of the unit cell in a charge or discharge cycle included in the specified charge/discharge cycle, based on the charging or discharging profile; anda diagnosis unit that diagnoses resistance characteristic of the unit cell based on the capacity voltage differential data, a diagnosis method thereof, and a unit cell for secondary battery satisfying specific conditions according to the method.

Example embodiments of the present technology provide a roll map generating method. The roll map generating method includes collecting first data, which represents a first event of an electrode sheet where a roll-to-roll process is performed, in a first memory region, and copying the first data to a second memory region.

Example embodiments provide a rewinding equipment. The rewinding equipment includes: an unwinder configured to unwind an electrode sheet from a first electrode roll; a scrap port configured to scrap a defective part of the electrode sheet; a rewinder configured to wind the electrode sheet into a second electrode roll; a first rotary encoder configured to sense a length of the electrode sheet unwound by the unwinder to generate an input amount signal; a second rotary encoder configured to sense a length of the electrode sheet wound by the rewinder to generate an exhaustion amount signal; and a first controller configured to collect coordinate data indicating a position on the electrode sheet based on the exhaustion amount signal.

A composite electrolyte membrane includes : (1) a liquid electrolyte; (2) a crosslinked polymer of a monomer having a curable functional group; and (3) oxide nanoparticles dispersed in the crosslinked polymer and having a particle size of 300 nm or less. The oxide nanoparticles include at least one compound particle selected from the a lithium-containing oxide or a lithium-containing phosphate. A method for manufacturing the composite electrolyte membrane is disclosed. A lithium secondary battery includes: (1) a positive electrode; (2) a negative electrode; and (2) the composite electrolyte membrane interposed between the positive electrode and the negative electrode. The composite electrolyte membrane may be coated onto the negative electrode, or may be separably interposed between the positive electrode and the negative electrode.

A battery management apparatus according to an embodiment of the present disclosure includes a profile obtaining unit configured to obtain a differential profile representing a corresponding relationship between a differential capacity and a voltage of a battery; and a control unit configured to determine a plurality of peaks in the differential profile, calculate a capacity of each of a plurality of voltage sections distinguished based on the plurality of peaks, calculate a capacity change rate of each of the plurality of voltage sections based on the calculated plurality of capacities and a preset reference capacity, and diagnose a state of the battery according to the calculated plurality of capacity change rates.

A battery manufacturing system includes an electrode processing device for performing the electrode process; and a roll map creation device for creating a roll map including coordinate data indicative of the location of an electrode and measurement and inspection data generated by the electrode process performed on the electrode and matched to the coordinate data. The electrode processing device includes an unwinder configured to unwind an electrode from a first electrode roll; a rewinder configured to wind the electrode onto a second electrode roll; an inspection measuring instrument for collecting the measurement and inspection data of the electrode being transferred; and a first encoder provided on one side of the electrode being transferred, and configured to detect a speed of movement of the electrode by irradiating the electrode with a laser, and the roll map creation device is configured to receive input of a defect location of the electrode and create an electrode removal section corresponding to the defect location, the electrode removal section being created based on data detected by the first encoder.

The present disclosure relates to a pouch cell for preventing or reducing the ingress of external moisture into a pouch through an area where gas inside the pouch is released to the atmosphere. The pouch cell according to the present disclosure includes an electrode assembly including a positive electrode, a negative electrode and a separator, a pouch accommodating the electrode assembly and having a hole, and a gas release film attached to the pouch to cover the hole and configured to allow gas to pass through, wherein the pouch includes a gas release portion having the hole and an outer packaging portion connected to the gas release portion, and wherein the gas release portion and the outer packaging portion have a stepped shape with each other.

A lithium secondary battery according to the present invention includes: an electrode assembly having a structure in which a plurality of electrodes and a plurality of separators are alternately stacked; and a battery case for receiving the electrode assembly, wherein the electrodes include an electrode current collector and an electrode active material layer disposed on the electrode current collector, and at least one of the plurality of electrode current collectors includes a glass layer, a first metal layer disposed on one surface of the glass layer, and a second metal layer disposed on the other surface of the glass layer.

The present disclosure relates to a backup battery assembly, and more specifically, to a backup battery assembly that supplies a current to a vehicle door lock to lock or unlock the vehicle door lock when the main power of the vehicle door lock is cut off. A backup battery assembly according to the present disclosure may include a backup battery that supplies a current to a vehicle door lock when the main power of the vehicle door lock is cut off, a backup battery case accommodating the backup battery, and a protection block installed inside the backup battery case to protect the backup battery, wherein the protection block may include a first end coupled to one side surface inside the backup battery case, a second end coupled to the other side surface inside the backup battery case, and a connection portion connecting the first end and the second end between the first end and the second end, wherein the cross-sectional area of the first end and the second end in the width direction of the backup battery case may be wider than the cross-sectional area of the connection portion in the first direction, and the protection block may be a rigid block made of SUS, aluminum, or steel.

The present invention relates to a discharge method for a link capacitor and a vehicle system providing the same, and a vehicle system of the present invention includes a battery, a link capacitor that is connected in parallel with the battery, an auxiliary discharge circuit that includes an auxiliary discharge resistor and an auxiliary discharge switch which are connected in series between the positive electrode and negative electrode of the battery, and a battery management system (BMS) that performs turn-on control on the auxiliary discharge switch when the magnitude of a link voltage which is the voltage between both terminals of the link capacitor after the link capacitor is discharged by a main discharge circuit which is connected in parallel with the link capacitor is equal to or greater than a reference value.

The battery management system wakes up based on a first control signal provided by an AC charger or a DC charger in response to a connection between the vehicle and the AC charger or the DC charger, determines a connection state between the AC charger or the DC charger and the vehicle based on a voltage of a second control signal determined based on the connection between the AC charger and the vehicle, or a voltage of a third control signal determined based on the connection between the DC charger and the vehicle, and selects an AC charging mode or a DC charging mode based on the voltage of the second control signal and the voltage of the third control signal to perform charging.

A roll map creating system for a series of roll-to-roll processes in which an electrode unwound from an unwinder is wound in a rewinder, the roll map creating system includes a roll map creating device for creating a roll map for each process, the roll map being defined in a coordinate plane including a longitudinal direction axis of the electrode and a width direction axis of the electrode, and a position of the electrode in each process is represented by a coordinate value of the coordinate plane. The roll map creating device includes a roll map matching part for matching a coordinate value of the roll map of each of the processes prior to the final process with a coordinate value of the roll map of the final process, such that the electrode represented by the roll map of the final process is matched with the electrode represented by the roll map of each of the processes prior to the final process in a series of roll-to-roll processes.

A roll map creating system for a series of roll-to-roll processes in which an electrode unwound from an unwinder is wound in a rewinder, the roll map creating system includes a roll map creating device for creating a roll map for each process, the roll map being defined in a coordinate plane including a longitudinal direction axis of the electrode and a width direction axis of the electrode, and a position of the electrode in each process is represented by a coordinate value of the coordinate plane. The roll map creating device includes a roll map matching part for matching a coordinate value of the roll map of each of the processes prior to the final process with a coordinate value of the roll map of the final process, such that the electrode represented by the roll map of the final process is matched with the electrode represented by the roll map of each of the processes prior to the final process in a series of roll-to-roll processes.

According to an embodiment disclosed herein, a battery charging method includes measuring a first voltage between a negative electrode of a battery and a reference electrode and a second voltage between a positive electrode of the battery and the reference electrode and charging the battery by applying a voltage to the battery such that the first voltage satisfies a constant value.

The present disclosure relates to a cylindrical secondary battery, and more specifically, to a cylindrical secondary battery capable of suppressing the upward movement of an electrode assembly inside a battery can even when the battery can is heated. A cylindrical secondary battery according to the present disclosure includes a battery can having an open top end portion, an electrode assembly accommodated in the battery can, a top cap assembly coupled to the top end portion of the battery can and formed with a gas outlet for discharging gases generated inside the battery can, and a thermal expansion tape attached to an upper region of the inner wall of the battery can and expanding when the battery can is heated, thereby suppressing the upward movement of an electrode assembly accommodated in the battery can even when heat is applied to the battery can, which may prevent a gas outlet formed at the top of the battery can from being blocked.

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