LG Energy Solution Patente

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A battery according to one embodiment disclosed herein may include a first measurement unit configured to measure a first voltage, which is a voltage between a first busbar connecting a first battery cell to a second battery cell and a second busbar connecting a third battery cell to a fourth battery cell, and transmit the first voltage to a management unit, a second measurement unit configured to measure a second voltage, which is a voltage between a third busbar connecting the second battery cell to the third battery cell and a fourth busbar connecting the fourth battery cell to a fifth battery cell, and transmit the second voltage to the management unit, and the management unit configured to calculate a voltage of the third battery cell by mathematically calculating the first voltage and the second voltage.

Provided is a rotary-type can beading apparatus capable of automatically correcting the height of a head. The rotary-type can beading apparatus comprises: a rotary; a plurality of arms which are arranged along the circumference of the rotary so as to rotate along with the rotary, and which extend in the radial direction; a head which is rotatably installed on each of the arms and is installed so as to be slidable in the axial direction; a beading knife which is installed on each of the arms so as to be movable in the direction moving close toward the rotation axis or moving away therefrom; a support roller which is arranged so as to face the beading knife with the rotation axis therebetween; a first rail cam which is provided with a first height profile extending in the circumferential direction with respect to the central axis; and a first cam follower which is raised along with the head and adjusts the height of the head by following the first height profile. The height of the first rail cam is adjusted by the operation of a first servo motor.

The present invention relates to a lithium secondary battery including a positive electrode including a positive electrode active material layer which includes a single-particle type positive electrode active material, a positive electrode conductive material, a positive electrode binder, and a positive electrode dispersant, a negative electrode, and an electrolyte, wherein the negative electrode includes a first negative electrode active material layer formed on a negative electrode current collector and including a first negative electrode active material, a first negative electrode conductive material, and a first negative electrode binder, and a second negative electrode active material layer formed on the first negative electrode active material layer and including a second negative electrode active material, a second negative electrode conductive material, and a second negative electrode binder, wherein the ratio of the content of the first negative electrode binder to the content of the second negative electrode binder is 1.5 to 3.0, and the difference in porosity between the positive electrode and the negative electrode is 4.2% to 9.8%, and the positive electrode has a value of FBR, which is defined by Equation 1 below, of 30 to 180. FBR=Rb×TDb+Rd×TDd×A2In Equation 1 above, Rb is a dimensionless number of the weight% of the positive electrode binder with respect to the total weight of the positive electrode active material layer, Rd is a dimensionless number of the weight % of the positive electrode dispersant with respect to the total weight of the positive electrode active material layer, TDb is a dimensionless number of the true density (g/cc) of the positive electrode binder, TDd is a dimensionless number of the true density (g/cc) of the positive electrode dispersant, and A is a dimensionless number of the average particle diameter (D₅₀, µm) of the positive electrode active material.

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A laser welding jig according to the present invention is applied to a battery cell assembly including a plurality of stacked battery cells and a side frame covering at least a portion of the plurality of battery cells, in which two adjacent leads are bent and welded, and the laser welding jig comprises: a pallet configured to allow the battery cell assembly to be seated thereon; and a protective jig arranged between the two adjacent leads.

Provided are a gripper and a method for manufacturing a battery pack by using same. The gripper according to an embodiment, which is for transporting, to a pack housing, a battery cell stack assembly including multiple flat battery cells stacked in a horizontal first direction and side beams coupled to one side and the other side in the horizontal first direction of the multiple flat battery cells, may include: a base disposed above the battery cell stack assembly; a suction part disposed on the lower side of the central area of the base to suck onto the battery cell stack assembly; and lift pins protruding below the base and coupling to grip holes formed in the side beams in the vertical direction.

The present disclosure is directed to providing a sulfide-based solid electrolyte having improved ion conductivity, a method for preparing a sulfide-based solid electrolyte, and an all-solid-state battery including a sulfide-based solid electrolyte. The present disclosure provides a sulfide-based solid electrolyte containing a Group 3 element and having an argyrodite-type crystal structure, the sulfide-based solid electrolyte being represented by the chemical formula of Li_7-x-3yM_yPS_6-xHa_x, wherein M is at least one element selected from Group 3 elements, Ha is at least one element selected from halogen elements, and x and y satisfy 1.0 < x < 2.5 and 0 < y ≤ 0.2.

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An apparatus for managing a battery may include a measurement module configured to measure state information of the battery, a first diagnosis module configured to diagnose whether the battery is abnormal by comparing the state information measured by the measurement module with a first diagnosis criterion, and a second diagnosis module configured to diagnose whether the battery is abnormal based on a change amount of the state information measured by the measurement module.

The present disclosure relates to a magnetic alignment device and a method of magnetic alignment of electrode active material in electrode using the same. The magnetic alignment device has a structure that controls the directionality of the N poles and S poles of each of a plurality of unit magnets included in a first magnetic portion and a second magnetic portion to magnetize magnetic members positioned between the unit magnets, and applies a magnetic field to electrode slurry through the magnetized magnetic members. Therefore, the magnetic alignment device can perform magnetic alignment of electrode active material in an electrode with high efficiency during manufacturing of electrodes for lithium secondary batteries. In addition, as the magnetic alignment device can easily control the application of a magnetic field depending on the magnetization of the magnetic members, it has the advantages of excellent workability and high economic efficiency in electrode manufacturing.

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