LG Energy Solution Patente

The battery module includes a plurality of battery cells, a module frame that accommodates the plurality of battery cells, end plates positioned on a front side and a rear side of the plurality of battery cells, respectively, and a cover frame that covers a top surface and both side surfaces of the module frame. Two or more folding portions are formed on each edge of the cover frame.

According to exemplary embodiments, a battery pack is provided. The battery pack may include a pack housing including a base plate, a center beam extending in a first direction and on the base plate, and a cross beam on the base plate crossing the center beam and extending in a second direction perpendicular to the first direction; a battery cell assembly on the base plate; and a first adhesive layer between the cross beam and the base plate.

Disclosed is a battery pack including a plurality of battery modules, a pack housing including an outer frame and a lattice-shaped partition wall provided in the outer frame, the partition wall including a first partition wall and a second partition wall configured to form a plurality of receiving recesses configured to receive the battery modules, a BMS system electrically connected to the plurality of battery modules via a connector, and a guide unit configured to guide the connector so as to be located along an upper side of the first partition wall, wherein the guide unit is inserted into and coupled to a guide recess formed in an upper part of the first partition wall.

A system for managing battery allows cell monitoring controllers (CMCs) to be commonly used regardless of the number of battery cells included in a battery module by using the same type of cell monitoring controllers even when a battery is composed of battery modules having different numbers of battery cells.

A battery pack according to an embodiment of the present disclosure includes a plurality of cell assemblies containing one or more battery cells and arranged in at least one row; a pack case configured to accommodate the plurality of cell assemblies; and a partition member configured to partition the plurality of cell assemblies within the pack case and made of flexible material to surround the plurality of cell assemblies in close contact.

Provided is a battery module having an improved structure to appropriately manage heat or gas discharged from the battery module. A battery module according to an aspect of the present disclosure includes a cell assembly including one or more battery cells, a module case having an inner space in which the cell assembly is accommodated, the module case including a venting hole through which venting gas generated from the cell assembly is discharged, a venting unit provided outside the module case, and configured to allow venting gas discharged from the venting hole to be introduced and discharged to an outside, and a cooling unit including at least a portion provided in a path through which the venting gas flows, the cooling unit being configured to absorb heat and release the heat to an outside.

Disclosed herein relates to a battery pack in which battery modules housed, including: a pack case including a the module area where the battery module may be seated; and a top cover coupled to the pack case to cover the top part of each battery module seated in the pack case, wherein the pack case includes: a base plate supporting a lower part of the battery module; and a side wall coupled along a border of the base plate, wherein the base plate is less thick than the top cover.

A system for manufacturing an electrode assembly is provided, wherein the electrode assembly includes a plurality of unit electrode cells stacked on one another, each of the plurality of unit electrode cells having a unit electrode tab, and wherein the electrode assembly has a main body portion and a tab portion, the tab portion including a plurality of unit electrode tabs protruding from the main body portion. The system comprises: a welding part configured to weld the plurality of unit electrode tabs by applying vibration force; a tab guide for collecting the plurality of unit electrode tabs to supply the collected unit electrode tabs to the welding part for welding; and a tab fixing block configured to hold and press the plurality of unit electrode tabs collected by the tab guide, such that the vibration force applied by the welding part is not transmitted to the main body portion of the electrode assembly.

A battery pack according to one embodiment of the present disclosure includes a lower pack housing having a plurality of module regions, a thermal conductive resin layer applied to the lower pack housing within the module region, a plurality of battery cell stacks mounted in each of the plurality of module regions on the thermal conductive resin layer, and an upper pack housing for covering the plurality of battery cell stacks.

An inspection apparatus (100) for detecting a defect (30) in an electrode tab (20) of an electrode assembly (10), wherein the electrode tab (20) is provided at a longitudinal end of the electrode assembly (10). The inspection apparatus (100) comprises a radiation emitting means (110) configured to emit an x-ray or a beta ray towards the electrode tab (20) and a radiation measuring means (120; 120a, 120b, 120c), disposed opposite the radiation emitting means (110) so as to have the electrode tab (20) positioned therebetween. The radiation measuring means (120; 120a, 120b, 120c) is configured to measure an amount of the x-ray or the beta ray transmitted through the electrode tab (20). The inspection apparatus (100) further comprises a processor (130) configured to process a signal corresponding to the measured amount of the x-ray or the beta ray and determine a defect (30) based on the amount of the x-ray or the beta ray measured at a portion within the electrode tab (20).

Disclosed is a secondary battery diagnosing technology capable of effectively diagnosing a state of a secondary battery using a charge and discharge signal of the secondary battery. The secondary battery diagnosing apparatus includes a memory unit configured to store a positive electrode reference profile and a negative electrode reference profile for charge or discharge of a reference battery; a voltage measuring unit configured to measure a voltage of a target battery during a charge or discharge process; and a processor configured to generate a charge and discharge measurement profile based on the voltage measured by the voltage measuring unit, compare a simulation profile obtained from the positive electrode reference profile and the negative electrode reference profile stored in the memory unit with the generated charge and discharge measurement profile, and determine a positive electrode adjustment profile and a negative electrode adjustment profile so that an error between the simulation profile and the charge and discharge measurement profile is within a predetermined level.

An apparatus for roll-pressing an electrode sheet is provided, wherein the electrode sheet has a coated portion in the middle along its width, extending in a longitudinal direction thereof and uncoated portions respectively positioned at both sides of the coated portion. The apparatus comprises: a stage on which the electrode sheet is to be placed; and a tab press roll configured to roll over one of the uncoated portions of the electrode sheet, for executing press work, wherein the tab press roll is configured, during the press work, to form a preset angle with respect to the stage, such that the tab press roll exerts less pressure at a side of the uncoated portion closer to the coated portion than the other side distant from the coated portion.

The present disclosure provides a battery cell storage device and a battery cell activation method using the same, wherein the battery cell storage device includes: a main body in which a battery cell is accommodated inside and which is capable of being sealed; a charge/discharge unit including a charge/discharge terminal electrically connected to an electrode lead of the battery cell in the main body; and a vacuum unit, and wherein the vacuum unit controls pressure inside the main body.

Disclosed is an electrode sheet manufacturing apparatus including an electrode current collector unit including an electrode current collector sheet supply roll configured to supply an electrode current collector sheet and an electrode current collector sheet winding roll configured to rewind the electrode current collector sheet, a coating unit configured to coat the electrode current collector sheet with electrode slurry, and a guide unit including a band-shaped guide member configured to prevent run-off of the electrode slurry, wherein the guide member is in contact with the electrode current collector sheet but is not attached thereto.

Disclosed are a top cap welding apparatus for cylindrical battery cells, the top cap welding apparatus including a transfer unit configured to transfer a cylindrical battery case in which an electrode assembly having an outwardly exposed electrode tab is received, a pressing unit located in front of the battery case, the pressing unit being configured to press the battery case, a support unit located at the rear of the battery case, the support unit being configured to support the battery case, a top cap holder configured to locate a top cap at the rear of the electrode tab, a top cap support unit including a support member configured to support the rear of the top cap, a second driving unit configured to drive the support member forward, and a third driving unit configured to drive the support member backward, and a welding unit configured to weld the electrode tab and the top cap to each other, and a top cap welding method for cylindrical battery cells using the same.

The present disclosure relates to a battery pack capable of preventing tab disconnection due to swelling of a battery cell, and a vehicle including the same, and provides a battery pack including a cell assembly including a plurality of battery cells arranged at least in a row, and a busbar assembly electrically connected to the cell assembly, wherein the busbar assembly may include a busbar frame having a predetermined length and provided along an arrangement direction of the plurality of battery cells, and at least one busbar connected to the electrode leads of the plurality of battery cells and mounted to the busbar frame so as to be movable along a longitudinal direction of the busbar frame, and a vehicle including the same.

An isotope battery unit is provided, which includes a first isotope battery layer including two or more first radiation sources extending in a first direction and a second isotope battery layer including two or more second radiation sources extending in a second direction different from the first direction, wherein the first isotope battery layer includes: the first radiation sources; a first conductivity-type semiconductor layer partially surrounding the first radiation sources such that one side surface of the first radiation sources is exposed; and a second conductivity-type semiconductor layer provided spaced apart from the first radiation sources with the first conductivity-type semiconductor layer interposed therebetween, and having first trenches on a surface spaced apart from the first conductivity-type semiconductor layer, wherein the first radiation sources and the second radiation sources cross and contact each other.

Disclosed are a swage apparatus, which is capable of preventing the occurrence of a scratch defect caused by excessive pressure applied to an opening portion of a battery housing during a swage process, and a method of determining an error in the swage process. A swage apparatus according to an embodiment of the present disclosure performs a swage process of compressing an opening portion of a cylindrical battery housing in which an electrode assembly is accommodated, and the swage apparatus includes a swage module including a housing and a pressing operation part and a pressing part provided in the housing, the swage module being configured to compress the opening portion of the battery housing by operating the pressing operation part between a pressure-releasing position and a pressing position in an operation direction parallel to a central axis of the battery housing, and operating the pressing part by the pressing operation part, a load measurement part installed in the housing and configured to measure a load applied in the operation direction by the pressing operation part at the pressing position, and a swage process error determination part configured to determine a swage process error on the basis of a load measurement value applied in the operation direction by the pressing operation part.

Disclosed are a top cap welding apparatus for cylindrical battery cells, the top cap welding apparatus including a transfer unit configured to move a cylindrical battery case in which an electrode assembly having an outwardly exposed electrode tab is received, a pressing unit disposed in front of the battery case, the pressing unit being configured to press the battery case, a support unit disposed at the rear of the battery case, the support unit being configured to support the battery case, a top cap holder configured to locate a top cap at the rear of the electrode tab, a top cap support unit configured to support the rear of the top cap, and a welding unit configured to weld the electrode tab and the top cap to each other, wherein the pressing unit is configured to press the battery case while controlling the angle between the electrode tab and the top cap or the distance between the electrode tab and the top cap such that the electrode tab corresponds in position to the top cap, and a top cap welding method for cylindrical battery cells using the same.

The present disclosure relates to a pouch cell assembly including: a battery cell including an electrode assembly, an electrode lead electrically connected to the electrode assembly, and a battery case that covers the electrode assembly with the electrode lead extending to the outside and has sealed edges; and a clip-type clamp unit fitted to the battery case and fixed to the battery cell, wherein the clamp unit presses the battery case corresponding to the portion where the electrode lead extends.

The present invention relates to a negative electrode for a lithium secondary battery including: a negative electrode active material layer provided on at least one surface of a negative electrode current collector layer; a surface layer provided on a surface of the negative electrode active material layer; and an inner layer provided between the negative electrode active material layer and the surface layer, wherein the surface layer and the inner layer include one or more selected from the group consisting of a polyvinyl-based polymer, a polyamide-based polymer, a polysilane-based polymer, a polyfluorene-based polymer, a polyaniline-based polymer, and a combination thereof, and the inner layer and the surface layer include polymers different from each other, thereby suppressing thermal runaway.

A secondary battery according to the present disclosure includes a first electrode, a second electrode, the first electrode and the second electrode being stacked in an alternating manner along a stack direction, and a separator configured to separate the first electrode from the second electrode, wherein the separator includes a first separator portion located between the first electrode and the second electrode, a second separator portion located opposite the first separator portion with respect to the first electrode, and a connection portion connecting the first separator portion to the second separator portion and covering an end portion of the first electrode, and wherein the connection portion has a gas vent hole having a larger length in a length direction parallel to an extension direction of the end portion of the first electrode than a width, the gas vent hole having a rounded corner.

Disclosed is a sealing tape attachment apparatus including a first supply unit configured to supply a jelly-roll type assembly, a second supply unit configured to supply a sealing tape to be attached to a winding end of the jelly-roll type assembly, a cutting unit configured to cut the sealing tape, a suction unit configured to suction the sealing tape supplied from the second supply unit, and a pressing unit configured to attach the sealing tape to the electrode assembly, wherein the second supply unit is configured such that the length of the sealing tape supplied varies according to the diameter of the jelly-roll type assembly.

Disclosed are a top cap welding apparatus for cylindrical battery cells, the top cap welding apparatus including a transfer unit configured to move a cylindrical battery case in which an electrode assembly having an outwardly exposed electrode tab is received, a pressing unit disposed in front of the battery case, the pressing unit being configured to press the battery case, a support unit disposed at the rear of the battery case, the support unit being configured to support the battery case, a top cap holder configured to locate a top cap at the rear of the electrode tab, a top cap support unit configured to support the rear of the top cap, and a welding unit configured to weld the electrode tab and the top cap to each other while pressing the electrode tab against the top cap at a predetermined pressure, and a top cap welding method for cylindrical battery cells using the same.

A cylindrical battery cell includes a battery case, and an electrode assembly including a first electrode and accommodated in the battery case. The first electrode includes a composite current collector including a positive electrode current collector and a negative electrode current collector facing the positive electrode current collector, a positive electrode active material layer formed on one surface of the positive electrode current collector to make up a positive electrode, and a negative electrode active material layer formed on one surface of the negative electrode current collector to make up a negative electrode.

According to an embodiment of the present disclosure, provided is an electrode pressing condition inspection system using optical measurement, comprising:a pair of pressing rollers located at upper and lower parts on the basis of the transfer position of an electrode,a driving unit that drives the pair of pressing rollers,a first light source located on one side in the driving direction of the pair of pressing rollers and irradiating light toward the pair of pressing rollers,a first sensor located on the other side in the driving direction of the pair of pressing rollers and detecting light transmitted from the first light source, anda control unit that analyzes surface information of the pair of pressing rollers and the gap between the pair of pressing rollers from information acquired by the first sensor,wherein the first light source and the first sensor are respectively movable in the width direction of the pair of pressing rollers.

The technical idea of the present disclosure provides a battery module including: a cell block including a plurality of battery cells; a module case including a bottom plate facing a bottom surface of the cell block, a first side plate facing a first side surface of the cell block, a second side plate facing a second side surface of the cell block, and a top plate facing an upper surface of the cell block; a front frame facing a front surface of the cell block; a rear frame facing a rear surface of the cell block and including a gas discharge hole; and a fire extinguishing cover including an upper cover portion between the upper surface of the cell block and the top plate, and a side cover portion between the rear surface of the cell block and the rear frame.

According to exemplary embodiments of the present disclosure, a battery pack that instantiates the technical concept of cooling from the upper side and venting gas from the lower side of the battery pack is provided. The battery pack includes: a pack case having a venting space; at least one battery unit stored inside the pack case above the venting space; and a cooling plate that seals an upper surface of the pack case, is tightly coupled to the battery unit, and has a cooling circulation flow path.

The present application relates to a negative electrode active material, a method for manufacturing a negative electrode active material, a negative electrode composition, a negative electrode for a lithium secondary battery including the same, and a lithium secondary battery including a negative electrode.

Disclosed is a battery pack. The battery pack includes a bottom cover assembly; a battery module installed on an upper surface of the bottom cover assembly; a top cover assembly located on the battery module and having a flow path formed therein and an injection hole configured to communicate with the flow path and face the battery module; a hole cover coupled to a lower surface of the top cover assembly and configured to seal the injection hole; and a support fixed between the hole cover and the battery module and configured to support the hole cover.

Disclosed is a battery module including a plurality of pouch-shaped battery cells, each of the pouch-shaped battery cells including an electrode assembly, a receiving portion configured to receive the electrode assembly, a terrace portion forming an edge of the receiving portion, and a sealed portion located outside the terrace portion, wherein a guide portion having a predetermined shape is interposed between the pouch-shaped battery cells, and one side of the guide portion is located so as to extend to the vicinity of the sealed portion.

A battery module according to an exemplary embodiment of the present disclosure includes a plurality of battery cell assemblies, each including one or more battery cells and a cell cover configured to enclose five surfaces of the one or more battery cells excluding an upper surface, and a busbar frame assembly coupled to at least one surface of the plurality of battery cell assemblies.

A battery diagnostic device according to an embodiment of the present disclosure may include a memory storing at least one instruction; and at least one processor executing the at least one instruction, and the at least one processor may acquire a set of reference data of a reference battery cell corresponding to each of a plurality of designated temperatures, acquire cell data of a battery cell at a specific temperature, fit each piece of reference data to the cell data such that deviations between each of the pieces of reference data included in the set of reference data and the cell data are minimized, identify first specific reference data included in the set of reference data and corresponding to a smallest deviation among deviations between each of the fitted pieces of reference data and the cell data, and diagnose a state of the battery cell based on a temperature corresponding to the first specific reference data corresponding to the smallest deviation among the plurality of designated temperatures.

A battery module according to the present disclosure may include a plurality of battery cells, a cell frame configured to accommodate the plurality of battery cells, and a filler filled between the plurality of battery cells, wherein the at least a portion of the cell frame may be recessed to form a leakage prevention groove for receiving the filler, wherein the cell frame may include a frame wall forming a perimeter of the cell frame and a cell accommodation portion provided inside the frame wall to accommodate the plurality of battery cells, and wherein the leakage prevention groove may be provided between the frame wall and the cell accommodation portion. According to the present invention, leakage of the filler may be prevented when the filler is injected. Additionally, in the case where the cell frames that accommodate the upper and lower portions of the battery cell are coupled to each other, it is possible to prevent the filler from leaking between the cell frames. In addition, it is possible to reduce manufacturing costs, increase energy density, and prevent the leakage of the filler.

A battery management system according to the present disclosure includes a battery monitor, a balancer and a control circuit to control the balancer. The control circuit determines a first voltage value indicating a no-load voltage of each battery, compensates the first voltage value of each battery using a balancing capacity of each battery by a balancing operation for a latest reference time, determines a voltage deviation which is a difference between the compensated first voltage value of each battery and a reference voltage value, and detects an internal short circuit fault in each battery by comparing a change amount of the voltage deviation of each battery for the reference time with a threshold.

Provided is a lithium secondary battery with reduced Hi-pot defects and improved capacity retention rate. According to one aspect of the present disclosure, there is provided a lithium secondary battery including an anode, a cathode, and a separator interposed between the anode and the cathode, in which the anode includes a Si-based anode active material, the separator includes a separator substrate having a plurality of pores and including a polyolefin resin, the polyolefin resin has a polydispersity index (PDI) of 2.5 to 4.2, an average pore size of 20 to 40 nm, and a maximum pore size of 50 nm or less.

A battery pack includes a plurality of battery cell assemblies, each including a battery cell and a cell cover covering three surfaces of the battery cell except for a lower surface; an upper case to which the plurality of battery cell assemblies are separately detachably coupled; and a lower case coupled to the upper case and covering a lower surface of the plurality of battery cell assemblies and formed of a transparent material. (Representative figure: FIG. 3)

The present disclosure relates to a secondary battery sealing device for sealing an exterior material of a secondary battery which can be repeatedly charged and discharged. The sealing device, according to an embodiment of the present invention, comprises a pressing unit for pressing an edge of an exterior material of a secondary battery, and a transfer unit for transferring energy supplied from the outside to the pressing unit, wherein the pressing unit includes: a main body for accommodating the transfer unit and made of a non-metallic material; and a metal member coupled to an outer surface of the main body and heated by receiving energy from the transfer unit.

Disclosed are a silicon-carbon composite in which, when subjected to etching with an argon (Ar) ion beam at an energy of 1,000 eV for 5,000 seconds followed by XPS analysis, a ratio of a proportion of Si measured from an Si^2p spectrum to a proportion of N measured from an N^1s spectrum is 35 to 200, a negative electrode active material including the silicon-carbon composite, a negative electrode composition, a negative electrode, a lithium secondary battery, a battery module, and a battery pack.

A battery cell assembly according to an exemplary embodiment of the present disclosure includes: a cell frame configured to accommodate a battery cell therein; an internal connection terminal electrically connected to the battery cell and exposed to the outside through a side surface of the cell frame; a terminal cover configured to be detachably mounted to the side surface of the cell frame and to cover the internal connection terminal; and an external connection terminal mounted on the terminal cover and having a rear end portion connected to the internal connection terminal at the rear of the terminal cover and a front end portion exposed forward of the terminal cover. The terminal cover may be formed in one of at least two types with different mounting positions of the external connection terminal and may be selectively mounted to the cell frame.