JP2008041526A - Manufacturing method and device of lithium secondary cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of lithium secondary battery in which the production lead time for a high temperature aging treatment can be shortened, and to provide a manufacturing device in which the manufacturing method can be realized faithfully. <P>SOLUTION: The lithium secondary battery 18, housed in an aging container 8, undergoes high-frequency heating, while being conveyed to reach a predetermined temperature T2 within a time range of few minutes to one hour, and the lithium battery at the predetermined temperature T2 is conveyed into the aging chamber 28 and kept as is for a predetermined number of days to carry out a high-temperature aging treatment. Cold wind is blown against the lithium secondary battery 18 after the high-temperature aging treatment, while it is removed from the ageing chamber 28 so as to lower the temperature to the room temperature T1 within the time range of one to two hours. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a manufacturing method for efficiently performing an aging process in a manufacturing process of a lithium secondary battery, and a manufacturing apparatus for faithfully embodying the manufacturing method.

  In recent years, portable and cordless electronic devices such as AV devices, personal computers, and portable communication devices have been rapidly promoted. As a driving power source for these electronic devices and other electronic devices, high energy density and load characteristics are achieved. There is a need for an excellent sealed battery. In particular, lithium secondary batteries are attracting attention because they have various features such as high energy density and output voltage, long storage life, and excellent weight reduction.

  In particular, lithium secondary batteries used as driving power sources for driving devices and electric vehicles are required to have a high rate discharge performance, but the resistance of non-aqueous electrolytes used in these lithium secondary batteries is significantly higher than that of aqueous electrolytes. Therefore, in order to obtain the above-described high rate discharge performance, the positive electrode plate and the negative electrode plate, which are constituent elements of the electrode plate group, need to be shaped so that their opposing areas increase. Therefore, in the lithium secondary battery, an electrode plate is used in which the length is set to be long by increasing the opposing area by using a very thin band shape compared to the electrode plate of the aqueous battery. This electrode plate generally has a configuration in which an active material coating is applied to a substrate made of a very thin strip-shaped metal foil and an active material layer forming portion is provided.

  The lithium secondary battery is subjected to aging treatment and charge / discharge inspection for the battery manufactured through the assembly process, and to the battery certified as a non-defective product, printed and covered with a tube made of vinyl. Have gone and shipped. The aging treatment is mainly performed for the purpose of activating the positive and negative electrode plates incorporated in the battery case.

  As a technology related to the aging process of the conventional lithium secondary battery, the open circuit voltage (OCV) and the internal resistance (IR) are measured before charging for the purpose of stabilizing high charge / discharge capacity and cycle characteristics. It is disclosed that only a battery with a good measurement result is charged, charged for a predetermined time and then left for 0.5 t, and then measured for either the open circuit voltage or the internal resistance (see, for example, Patent Document 1). ). This technology relates to a manufacturing process for activating a battery by devising a combination of an aging temperature after charging and a standing time.

  Further, as another aging treatment method in the conventional lithium secondary battery, the cycle characteristics at high temperature can be stabilized by subjecting the assembled battery to aging treatment at a high temperature of 60 ° C. to 90 ° C. for a predetermined time. It has been proposed (see, for example, Patent Document 2). In Patent Document 2, the mixing ratio of the lithium nickel composite oxide is set to 20 wt% or more and 50 wt% or less when the total of the lithium nickel composite oxide and the lithium manganese composite oxide is 100 wt%. It has also been proposed to use a lithium secondary battery having a large initial discharge capacity.

  Patent Document 1 and Patent Document 2 specifically describe an aging process for the purpose of initial activation of positive and negative electrode plates incorporated in a battery case and voltage stabilization by forming a protective film on the surface of the active material. Little is disclosed about the mass production process. In this aging process, about 100 to 150 cells of the battery that has undergone the assembly process are packed in a resin container, and a predetermined number of the resin containers are stacked on a transfer pallet, and then placed in an aging chamber heated to a specified temperature. Carry in. As a result, as shown in FIG. 7, the temperature of all the batteries carried into the aging chamber is heated by the convection heat in the high temperature atmosphere in the aging chamber, so that the normal temperature T1 (generally 20 ° C.) to the specified temperature T2 (generally 45 The temperature is raised to a temperature within the range of from 60 ° C to 60 ° C. A high temperature aging process for activating the active material, which is the original purpose, is performed from the time when the battery is heated to the specified temperature T2, and after the high temperature aging process is completed, The battery temperature is lowered to room temperature T1, and the battery voltage is measured.

In the field of alkaline storage batteries, for example, when at least one charge / discharge cycle is performed on a nickel-metal hydride storage battery after completion of assembly, the discharge before standing aging is performed at a discharge rate of 0.2 C or higher, and the remaining capacity of the battery is fully discharged. There is known a manufacturing method that includes a step of performing until reaching 20% or less of the capacity and a step of performing aged aging to leave the battery having the remaining capacity (see, for example, Patent Document 3).
JP-A-11-250929 JP 2002-25626 A JP-A-6-231799

  However, in FIG. 7 showing the aging process of the conventional lithium secondary battery, the heating step P1 for bringing the battery temperature from room temperature T1 to the specified temperature T2 is not efficient due to heating by convective heat conduction. In addition, since it is necessary to wait until all the batteries including the battery which is difficult to be heated at the center of the resin container are heated to the specified temperature T2, a relatively long time of 24 hours is required. In addition, the cooling process P3 for lowering the temperature of each battery after the high temperature aging process P2 from the specified temperature T2 to the room temperature T1 employs a natural cooling that is left at room temperature or a system that blows air at room temperature. It cannot be cooled automatically and still takes about 24 hours. As described above, in the conventional aging process of the lithium secondary battery, in addition to the originally intended high-temperature aging process P2 taking 2 to 6 days, the heating process P1 and the cooling process P3 which are not related to the aging process are performed. Since each takes about 24 hours, the production lead time becomes long, and there is a problem that it is not possible to quickly respond to the requested delivery date of the market.

  On the other hand, the aging treatment method disclosed in Patent Document 1 relates to a manufacturing process for battery activation, while the aging treatment method disclosed in Patent Document 2 promotes activation in high-temperature aging treatment. In any case, there is no disclosure of specific means for raising the temperature to the aging temperature or cooling from the aging temperature to the room temperature, so that it is not a reference for solving the above-mentioned problems. On the other hand, Patent Document 3 is an aging treatment method in an alkaline storage battery that is different from the present invention, and relates to a manufacturing process for activating the battery, and is also not a reference for solving the above problems.

  The present invention has been made in view of the above problems, and can faithfully embody a manufacturing method capable of shortening the production lead time of high-temperature aging treatment of a lithium secondary battery and the manufacturing method thereof. The object is to provide a manufacturing apparatus.

  In order to achieve the above object, a method for manufacturing a lithium secondary battery according to the first aspect of the present invention includes a lithium secondary battery accommodated in an aging container, which is heated for several minutes to 1 hour while being conveyed. The lithium secondary battery at the specified temperature is brought into the aging chamber and left for a predetermined number of days to perform a high temperature aging treatment, and the lithium after the high temperature aging treatment is The secondary battery is lowered to room temperature within a time range of 1 to 2 hours by blowing cold air while carrying it out of the aging chamber and carrying it.

  According to a second aspect of the present invention, there is provided an apparatus for manufacturing a lithium secondary battery, comprising: a transport means for transporting a lithium secondary battery housed in an aging container; and the lithium secondary battery being transported provided in a transport path of the transport means. A rapid heating unit having I / H heaters forcibly heating the secondary battery from above and below, and an aging chamber into which a predetermined number of the aging containers carried out from the rapid heating unit are carried in a stacked state, and the aging A high-temperature aging portion in which the interior of the chamber is maintained in an atmosphere of a specified temperature, a transport means for transporting the lithium secondary battery accommodated in the aging container carried out of the aging chamber, and transport of the transport means A rapid cooling unit having a cold air chamber forcibly cooling the lithium secondary battery that is provided in a path by blowing cold air from above to below the lithium secondary battery being conveyed; It is characterized in that it comprises.

  According to a third aspect of the present invention, in the lithium secondary battery manufacturing apparatus according to the second aspect of the present invention, each lithium secondary battery in the aging container being transported is positioned downstream of the I / H heater in the rapid heating section in the transport direction. An auxiliary heating chamber for uniformly blowing hot air to the secondary battery is provided, and a cold air nozzle having a slit-like air outlet extending linearly in a direction orthogonal to the conveying path of the aging container is provided in the cold air chamber of the rapid cooling unit, It is provided at regular intervals along the conveying path of the aging container.

  In the invention of claim 1, since the lithium secondary battery is effectively forcibly heated by high-frequency heating prior to the start of the high-temperature aging treatment, the heating process that has conventionally required 24 hours is performed for several minutes to 1 The lithium secondary battery after high-temperature aging treatment can be effectively forced-cooled by blowing cold air while being able to be significantly shortened within the time range of time. It can be significantly shortened within 2 hours, and the production lead time of high-temperature aging treatment can be greatly improved by 1.5 to 2 times compared with the conventional method, and the required delivery time in the market can be quickly met. It becomes possible. In addition, since the temperature difference between the lithium secondary batteries during the high temperature aging treatment is extremely small, it is possible to obtain a lithium secondary battery with little variation in battery performance.

  The invention of claim 2 includes an I / H heater that can be most effectively forced-heated as a means for high-frequency heating, and a cold air chamber that can be forcibly cooled by blowing cold air from above to below the lithium secondary battery. Therefore, the manufacturing method of the present invention can be faithfully realized and the effects of the manufacturing method can be obtained with certainty.

  In the invention of claim 3, the temperature difference generated in the lithium secondary battery after being forcedly heated by the I / H heater can be eliminated by heating by the auxiliary heating chamber, and the cold air is supplied to each cold air nozzle of the cold air chamber. The cold air can be evenly dispersed by passing it, and a cooling space in which the entire space is uniformly maintained at a predetermined low temperature can be formed below the cold air chamber and above the conveyance path of the aging container. it can.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing an overall outline of a manufacturing apparatus that embodies a method for manufacturing a lithium secondary battery according to an embodiment of the present invention. Specifically, a configuration diagram showing an aging treatment system embodying an aging treatment method aimed at initial activation of positive and negative electrode plates of a lithium secondary battery and voltage stabilization by forming a protective film on the active material surface. It is. This aging treatment system includes a rapid heating unit 1 that rapidly heats a battery after production is completed and quickly raises the temperature to a specified temperature for aging treatment, and a battery that has been heated to the specified temperature. A high-temperature aging unit 2 that performs a required aging process by exposure to a high-temperature atmosphere, and a quick-cooling unit 3 that forcibly cools the temperature of the battery that has been subjected to the high-temperature aging process to quickly reduce the temperature to room temperature. Has been.

  FIG. 2 is a schematic sectional view schematically showing the internal configuration of the rapid heating unit 1. The rapid heating unit 1 is provided with an I / H heating chamber 4 for directly heating a battery (not shown) and an auxiliary heating chamber 7 disposed in the subsequent stage, and the battery is accommodated as described later. The resin aging container 8 is sequentially passed through the I / H heating chamber 4 and the auxiliary heating chamber 7 in a state where the resin aging container 8 is placed on the conveyance chain conveyor 9 that is driven to rotate. The transport chain conveyor 9 is wound around a driving roller 10 and a plurality of (four in this embodiment) main guide rollers 11 so that constant speed running is intermittently repeated by driving control of the driving roller 10. It has become. In the I / H heating chamber 4, two sets of I / H heaters 12 and 13, which are a kind of high-frequency heating device, are provided at upper and lower locations along the conveying path of the aging container 8. ing. In practice, a pair of upper and lower I / H heaters 12 and 13 are connected in a loop.

  FIG. 3 is a schematic cross-sectional view schematically showing the internal structure of the I / H heating chamber 4. In FIG. 3, for convenience of illustration, the illustration of the transport chain conveyor 9 and the like is omitted. The above-described upper and lower I / H heaters 12 and 13 are supplied with a high-frequency current from a high-frequency transmitter 17 driven by power supplied from a drive power supply 14, thereby allowing the lithium secondary battery 18 accommodated in the aging vessel 8 to be accommodated. Heat directly.

  Moreover, the aging container 8 has 100 to 150 battery holder portions 19 that can accommodate and hold the lithium secondary battery 18 in an upright arrangement. An opening 20 is provided on the bottom surface of each battery holder 19, and a heating space 21 for retaining hot air entering from the opening 20 is provided between each two adjacent battery holders 19. Is provided.

  The I / H heaters 12 and 13 are heating means capable of forcibly heating and rapidly raising the temperature of the object to be heated, and include P (proportional element) / I (integral element) for the high-frequency transmitter 17. ) · D (differential element) control enables temperature control to be performed with high accuracy. The object to be heated in this embodiment is a lithium secondary battery 18 accommodated in 100 to 150 cells in the aging container 8, and all the lithium secondary batteries 18 are connected to the I / H heaters 12 and 13. Therefore, the time required to raise the temperature to 45 ° C. to 60 ° C., which is the specified temperature necessary for the high temperature aging treatment, is about 5 minutes.

  The lithium secondary battery 18 located at the center of the aging vessel 8 among the lithium secondary batteries 18 that are forcibly heated so as to rapidly increase the temperature to the specified temperature in the I / H heating chamber 4 has a slow temperature increase. There is a tendency for a slight temperature difference of about 1 to 2 ° C. between the lithium secondary batteries 18. Therefore, as shown in FIG. 3, the auxiliary heating chamber 7 subsequent to the I / H heating chamber 4 in the rapid heating process has a temperature difference generated in the lithium secondary battery 18 after forced heating in the I / H heating chamber 4. The hot air sent from the hot air generator 22 to the upper part of the auxiliary heating chamber 7 through the air duct 23 passes through a large number of slit-like air nozzles 24. The lithium secondary batteries 18 in the aging container 8 transported by the transport chain conveyor 9 are evenly sprayed. The hot air after heating the lithium secondary battery 18 is returned to the hot air generator 22 through the return duct 27, reheated and turned into hot air, and circulated so as to be supplied to the auxiliary heating chamber 7.

  As shown in FIG. 1, the aging container 8 in which the lithium secondary battery 18 that has been heated to the specified temperature in the rapid heating process is housed in a state of being stacked in a predetermined number by a manual operation by an operator H. Into the aging chamber 28 of the high temperature aging unit 2. In addition, the carrying-in of the aging container 8 into the aging chamber 28 is not limited to the above-described manual operation, but can be performed by a conveying means such as a conveyor that connects the rapid heating process 1 and the high temperature aging process. . The aging chamber 28 is a temperature-controlled room always maintained in an atmosphere of a specified temperature, and the lithium secondary battery 18 in the aging container 8 placed in the aging chamber 28 is necessary for performing a required aging process. Left for a number of days, for example 2-6 days.

  If the high-temperature aging process is completed after the required number of days are placed in the aging chamber 28, the aging container 8 taken out from the aging chamber 28 is carried into the rapid cooling unit 3 by the manual operation of the worker H. FIG. 4 is a schematic sectional view schematically showing the internal configuration of the rapid cooling section 3. The rapid cooling section 3 is provided with a transport chain conveyor 31 that is rotated by rotation of a drive roll 30 that is rotationally controlled by a drive device 29, and an aging container carried in one box by a worker H shown in FIG. 8 is conveyed along a predetermined conveyance path. Note that the carrying of the aging container 8 into the rapid cooling unit 3 is not limited to the above-described manual operation, but can be performed by a transport device such as a conveyor that connects the aging chamber 28 and the rapid cooling unit 3. is there.

  Inside the rapid cooling unit 3, three cold air chamber chambers 32 having the same configuration are installed along a conveyance path provided by the conveyance chain conveyor 31. The reason why the three cold air chambers 32 are provided in this way is to allow the temperature condition to be variably set in accordance with the difference in battery size. In the cold air chamber chambers 32, cold air generated by driving three cold air fans 33 provided individually corresponding thereto is supplied through the cold air duct 34. As a result, the inside of each cold air chamber chamber 32 is always maintained at a temperature of 0 ° C. to 5 ° C., and the wind that is warmed by cooling the lithium secondary battery 18 in the cold air chamber chamber 32 corresponds through the feedback duct 37. The air is returned to the cold air machine 33, and is circulated so as to be cooled again and supplied into the cold air chamber chamber 32.

  A cold air chamber 38 as shown in FIG. 5 is arranged in each of the cold air chamber chambers 32. In the cold air chamber 38, cold air nozzles 39 having slit-like air blowing ports 39 a extending linearly in a direction orthogonal to the conveyance path of the aging container 8 are provided at regular intervals along the conveyance path of the aging container 8. ing. Accordingly, the cold air supplied from the cold air fan 33 into the cold air chamber chamber 32 is evenly dispersed by passing through the cold air nozzles 39 of the cold air chamber 38, so that it is below the cold air chamber 38 and in the aging container 8. A cooling space 40 in which the entire space as shown in FIG. 4 is uniformly maintained at a low temperature of 0 ° C. to 5 ° C. is formed at an upper portion of the conveyance path.

Next, the high temperature aging process of the lithium secondary battery 18 by the aging process system will be described. When performing the high temperature aging treatment, the aging container 8 in which 100 to 150 cells of the lithium secondary battery 18 is housed is sequentially transferred by being sequentially placed on the transport chain conveyor 9 of FIG. The inside of the I / H heating chamber 4 and the auxiliary heating chamber 7 is sequentially passed. When passing through the I / H heating chamber 4, each lithium secondary battery 18 is heated for abruptly by being forcibly heated directly by the two upper and lower I / H heaters 12 and 13. That is, in FIG. 6, when the aging container 8 is carried into the rapid heating unit 1 at t _0, it is instantaneous from the normal temperature T1 to the specified temperature T2 after about 5 minutes from the time when the aging container 8 enters the I / H heating chamber 4. The temperature is increased.

Accordingly, in the rapid heating section 1, the speed of the transport chain conveyor 9 is set so that the aging container 8 passes through the interiors of the I / H heating chamber 4 and the auxiliary heating chamber 7 in about 5 minutes. The aging container 8 carried into the heating unit 1 is inserted into the aging chamber 28 of the high temperature aging unit 2 by the worker H after a lapse of about 5 minutes from that time, and the high temperature aging process is started. In other words, in this aging processing system, when preparing to start the high temperature aging process at t ₀ in FIG. 6, it can be said that the high temperature aging process can be started with almost no waiting time. The processing time of about 24 hours required for the heating process P1 of FIG. Note that the I / H heaters 12 and 13 used as the forced heating means in the rapid heating unit 1 are immediately suppressed from being heated by turning off the power supply when an equipment trouble such as a temperature abnormality occurs. This is because it is particularly safer than the heater. With heaters other than the I / H heaters 12 and 13, it is difficult to immediately stop the temperature rise due to the remaining heat even when the power is turned off.

The lithium secondary battery 18 which has been left in the atmosphere of the specified temperature T2 in the aging chamber 28 in the high temperature aging part 2 for 2 to 6 days and completed the high temperature aging treatment step P2 is in a state of being accommodated in the aging container 8. As it is, it is transferred onto the transport chain conveyor 31 of the rapid cooling section 3 and sequentially passes through the three cold air chamber chambers 32. In the lithium secondary battery 18 passing through the cold air chamber 32, cold air maintained at a low temperature of 1 ° C. to 10 ° C. is 5 m / min to 10 m / min from the upper side to the lower side of the lithium secondary battery 18. Sprayed at wind speed. Thus, as shown in FIG. 6, each of the lithium secondary battery 18 of the predetermined temperature T2, when carried into the t ₁ at the rapid cooling section 3, t after elapse from the time of about 1-2 hours ₂ It is cooled rapidly so that it sometimes drops to room temperature. That is, in the conventional high-temperature aging process of FIG. 7, the cooling process P3 takes 24 hours, whereas in the above embodiment, the cooling process P3 is completed in only about 1-2 hours.

  In the conventional high-temperature aging treatment, a predetermined number of aging containers 8 are stacked and carried into the aging chamber and the heating process P1 and the high-temperature aging process P2 are performed. Each lithium secondary battery is in a stacked state. Due to the fact that it is contained in the aging container 8 and is not easily heated, the heating process P1 takes a long time of 24 hours. On the other hand, in the above embodiment, it is possible to raise the temperature to the specified temperature T2 in about 5 minutes, coupled with the improvement of heating efficiency by conveying each aging container 8 one box at a time. ing.

  As described above, the aging treatment system of the above-described embodiment can significantly shorten the heating process P1 that conventionally required 24 hours to about 5 minutes and the cooling that conventionally required 24 hours. Since the process P3 can be significantly shortened to 1 to 2 hours, the high temperature aging treatment capability of the lithium secondary battery 18 is reduced to 1.5 to 2 times that of the prior art as the production lead time is shortened. It is possible to respond rapidly to the requested delivery date of the market. In addition, since the temperature difference between the lithium secondary batteries 18 during the high-temperature aging treatment is extremely small, a lithium secondary battery with little variation in battery performance can be obtained.

  According to the method for manufacturing a lithium secondary battery according to the present invention, since the lithium secondary battery is effectively forcibly heated by high-frequency heating prior to the start of the high-temperature aging treatment, it conventionally takes 24 hours. The heating process can be significantly shortened within a time range of several minutes to 1 hour, and the lithium secondary battery after the high temperature aging treatment is effectively forcedly cooled by blowing cold air. Since the cooling process, which took time, can be significantly shortened within 2 hours, the processing capacity for high-temperature aging is dramatically improved to 1.5 to 2 times that of conventional products. The improvement of sex can be greatly improved. In addition, the lithium secondary battery manufacturing apparatus of the present invention includes an I / H heater that can perform forced heating most effectively as a means of high-frequency heating, and forcedly blows cold air from above to the lithium secondary battery. Since the cool air chamber which can be cooled is provided, the manufacturing method of the present invention can be faithfully realized, and the effect of the manufacturing method can be obtained with certainty.

The block diagram which shows the outline of the whole manufacturing apparatus which actualized the manufacturing method of the lithium secondary battery which concerns on one embodiment of this invention. Schematic cross section schematically showing the internal structure of the rapid heating unit in the manufacturing apparatus Schematic cross-sectional view schematically showing the internal structure of the I / H heating chamber in the rapid heating section Schematic cross-sectional view schematically showing the internal configuration of the rapid cooling section in the manufacturing apparatus The perspective view which shows the principal part structure of the cold air chamber room in the rapid cooling part same as the above. Characteristic diagram showing temperature change of lithium secondary battery during high temperature aging treatment by the same manufacturing equipment Characteristic diagram showing temperature change of lithium secondary battery during high temperature aging treatment by conventional manufacturing equipment

Explanation of symbols

1 Rapid heating section
2 High temperature aging part
3 Rapid cooling section
7 Auxiliary heating chamber
8 Aging containers
9 Transport chain conveyor (transport means)
12, 13 I / H heater 18 Lithium secondary battery 28 Aging chamber 31 Conveying chain conveyor (conveying means)
38 Cold air chamber 39 Cold air nozzle 39a Air outlet T1 Normal temperature T2 Specified temperature

Claims (3)

The lithium secondary battery accommodated in the aging container is heated to a specified temperature within a time range of several minutes to 1 hour by high-frequency heating while being conveyed,
High temperature aging treatment is performed by bringing the lithium secondary battery of the specified temperature into the aging chamber and leaving it for a predetermined number of days,
The lithium secondary battery after the high-temperature aging treatment is lowered to room temperature within a time range of 1 to 2 hours by blowing cold air while being carried out of the aging chamber. A method for producing a lithium secondary battery. A rapid means having transport means for transporting a lithium secondary battery housed in an aging container, and an I / H heater provided in a transport path of the transport means for forcibly heating the lithium secondary battery being transported from above and below. A heating unit;
A high-temperature aging unit having an aging chamber in which a predetermined number of the aging containers carried out from the rapid heating unit are carried in a stacked state, and the inside of the aging chamber being maintained in an atmosphere at a specified temperature;
A transport means for transporting the lithium secondary battery accommodated in the aging container carried out from the aging chamber, and a lower side from above with respect to the lithium secondary battery that is provided in the transport path of the transport means and is being transported A rapid cooling section having a cold air chamber forcibly cooling by blowing cold air toward the
An apparatus for producing a lithium secondary battery, comprising: An auxiliary heating chamber for uniformly blowing hot air to each lithium secondary battery in the aging container being transported is provided on the rear side in the transport direction with respect to the I / H heater in the rapid heating section,
Cold air nozzles having slit-like air outlets that extend linearly in a direction orthogonal to the conveyance path of the aging container are provided in the cold air chamber of the rapid cooling section at regular intervals along the conveyance path of the aging container. The lithium secondary battery manufacturing apparatus according to claim 2.

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