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Battery cell activation method and activation device

By adding lithium nickel oxide to the nickel-cobalt-manganese cathode material and activating it under specific temperature and pressure conditions, combined with heating and extrusion technology, the problem of deformation and failure caused by gas generation in the battery cells is solved, and the capacity of the battery is increased. retention and performance stability.

Active Publication Date: 2019-11-12
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, there is a problem that gas is generated in the battery cell due to the phase transition of LNO in a state where unreacted lithium by-products remain in the raw materials required for the production of LNO
[0009] The gas generated in the battery cell may act as a resistance, or cause deformation of the battery module and battery pack, so the failure rate of the product increases
In particular, in the case of a pouch-type secondary battery having a relatively soft case rather than a can-type secondary battery having a relatively rigid case, deformation due to gas generation is more severe.

Method used

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  • Battery cell activation method and activation device
  • Battery cell activation method and activation device
  • Battery cell activation method and activation device

Examples

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Embodiment 1

[0034] refer to figure 2 and 3 , the apparatus for activating a battery cell according to Embodiment 1 of the present invention includes: a tray 20 into which the battery cells 10 are respectively housed or assembled to be fixed; and contact devices 30 and 40, the contact devices 30 and 40 are connected to the positive electrode 11 and the negative electrode 12 of each battery cell 10 fixed to the tray 20 to charge / discharge the battery cell 10, and the device further includes: a heating plate 50 which is fitted between two or more stacked battery cells 10 to heat the battery cells 10; and a pressing device 60 that presses the battery cells 10 in the stacking direction to Each battery cell 10 applies pressure.

[0035] Here, the heating plate 50 may simultaneously perform two functions of pressing and heating the battery cells 10 according to a desired design. That is, the pressing device 60 may not be separately provided but combined with the heating plate 50 .

[0036] ...

Embodiment 2

[0044] Furthermore, the present invention provides a method for activating the battery cell 10 by using the above-described activating device.

[0045] The method according to Example 2 of the present invention is a method for activating a battery cell comprising a positive electrode coated with nickel cobalt manganese (NCM) positive electrode material, lithium nickel oxide (LNO) is added or mixed into the nickel-cobalt-manganese (NCM) cathode material. The method includes the steps of charging the battery cell 10 and discharging the battery cell 10 . The charging step and the discharging step are repeatedly performed at least once or at least twice. In the step of charging the battery cell 10, the battery cell 10 is charged under the charging condition of a C-rate of 0.1C to 0.5C in a state of being heated at a temperature of 45°C to 60°C. to charge. For reference, 1C-rate means the amount of current used when a cell is fully charged for 1 hour, 0.1C means the amount of cu...

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Abstract

The present invention relates to a method for activating a battery cell comprising a positive electrode having applied thereto a nickel cobalt manganese (NCM) positive electrode material having lithium nickel oxide (LNO) added or mixed therein, the method comprising a step for charging a battery cell, and a step for discharging the battery cell, wherein, in the step for charging the battery cell,the battery cell is charged at a C-rate of 0.1-0.5C, from a state of being heated to a temperature of 45-60 DEG C. At the time of the activation process of the present invention having such features,pressuring / heating conditions that inhibit gas generation are provided, and, thus, swelling, battery deformation, and performance deterioration due to gas generation can be prevented.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2017-0163720 filed on November 30, 2017, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to an apparatus and method for activating a battery cell, and more particularly, the present invention relates to an apparatus and method for activating a battery cell in which heat (and / or pressure) is applied to the battery cells to reduce activation time and gas generation during the activation process. Background technique [0004] In recent years, demand for secondary batteries as energy sources is rapidly increasing with technological development and increased demand for mobile devices. Depending on the type of external device, such a secondary battery may be used in the form of a single battery cell, or in the form of a battery module in which a plurality of unit cells are electric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M4/04H01M10/058H01M4/36H01M4/525H01M4/505
CPCH01M10/446H01M4/366H01M4/131Y02E60/10Y02P70/50H01M10/049H01M4/0447H01M10/058H01M4/364H01M4/525H01M4/505
Inventor 崔锺焕李恩周李知垠南艺真
Owner LG ENERGY SOLUTION LTD