[1]The present invention relates to a pouch type secondary battery, and more particularly, to a battery module including the same and reusable pouch type secondary battery. The invention further also relates to a method of recycling recycling method and a general battery module of such a battery module. This application claims priority to an application for the Republic of Korea Patent Application No. 10-2017-0052906, filed on April 25 2017, all the contents disclosed in the specification and drawings of that application is hereby incorporated by reference into this application.
BACKGROUND
[2]
In recent years the demand for portable electronic products such as laptops, video cameras, portable telephones are rapidly increasing, the electric vehicle, energy as storage batteries, robots, and the full-fledged development of satellites for, repeated charging and discharging a high-performance rechargeable batteries the research has been going on actively. The lithium secondary battery among the secondary batteries are commercially available is the memory effect, compared to a secondary battery of nickel-based is not rarely free and can be charged and discharged, was self-discharge rate is very low, is spotlighted because of the high energy density advantage.
[3]
In recent years, it has become widely used in the middle- or large-sized devices, such as a secondary battery, as well as small equipment such as portable electronic products, automobiles and electric power storage device (ESS). In particular, carbon and energy is increasingly being depleted As increased interest in the environment, including the United States, Europe, Japan, Korea, globally increasing demand for hybrid cars and electric cars. The central part in such a hybrid vehicle or the electric vehicle is a battery pack for imparting a driving force to the motor vehicle. The hybrid vehicle or electric vehicle is a situation where users are increasing in the sense that it is possible to obtain a driving force of the vehicle through the charging and discharging of the battery pack, the excellent fuel economy as compared to only a vehicle using the engine can be reduced or not exhaust pollutants.
[4]
When the secondary battery used for an electric vehicle, to configure a large number of battery modules connected to the secondary battery in series and / or in parallel to increase the capacity and the output is produced by the battery pack. At this time, the middle- or large-sized apparatus is used a lot of the pouch type secondary battery due to the advantage that the laminate easily.
[5]
Figure 1 shows a typical pouch-type secondary battery is illustrated.
[6]
1, a typical pouch-type secondary battery 1 is a pouch packaging material 10 in the electrode assembly 20 is accommodated is formed in the seal sealing portion 30, the electrode lead (40, 45) includes an electrode It is respectively welded to the positive electrode tab and the negative electrode tab of the assembly 20 is exposed to the outside of the pouch exterior material 10. This lead film 50 is interposed between the pouch exterior material 10 and the electrode lead (40, 45). Is referred to as the take-off side of the terrace (T) among the sealing part 30, in particular the electrode lead (40, 45).
[7]
The pouch as in secondary battery 1 is in Figure 2, the number of dogs stacked and connected between the electrode lead (40, 45) provided to each of the two pouch-type secondary battery (1) adjacent to each other in series and / or in parallel by being connected to constitute the battery module 11, which improves the capacity and output. Reference numeral 60 is a structure of the structural support to the battery module 11 such Extrusions.
[8]
When connecting the pouch type secondary battery (1) for manufacturing a battery module 11, and applying the laser welding (L) for the connections between the electrode lead (40, 45). The battery module 11 is to be used as such as an automobile battery, then the lifetime of the object bar would be desirable if the end of its utilization for the second purpose, such as the capacity retention rate and other conditions less stringent ESS. For this purpose it is necessary to recycle to dismantle the existing connection structure of a first battery module and manufacture the pouch type secondary battery with a new battery modules connected in a different way. However, the past, can not be removed for the electrode lead (40, 45) joined by a laser welding (L) in a non-destructive method recycling is not easy.
[9]
As shown in Figure 3, the laser welding (L) if the cut along a cutting plane (C) of the welding portion (A), the remaining electrode lead (40 ', 45 ") in length is too short. For this reason, the remaining electrode lead (40 ', 45') with which it is not only the recycling is to reconnect and welding.
[10]
In this manner, Conventionally, any attempt to reuse a pouch-type secondary battery, to break down the battery module as a new challenge to the battery module that has sufficient length electrode lead.
Detailed Description of the Invention
SUMMARY
[11]
The present invention is designed to solve the problems as described above, object of the present invention to provide a reusable pouch type secondary battery.
[12]
Another object of the present invention to provide a reusable battery modules.
[13]
Another object of the present invention to provide a method for recycling a battery module.
[14]
It may be understood by the following description of Other objects and advantages of the present invention will be appreciated more clearly by the embodiment of the present invention. Also, the objects and advantages of the invention will be readily appreciated that this can be realized by means and combinations as shown in the claims.
Problem solving means
[15]
In the pouch type secondary battery of a pouch type secondary battery according to the present invention for solving the problems as described above, the electrode leads and their electrode leads of the other pouch type secondary battery of neighbors are welded to each other constitute the battery module, an electrode been cut, welded portion between the lead welding to re-welding between the electrode leads of the remaining length to contain the electrode lead portion extending length.
[16]
In one embodiment of the present invention, the pouch type secondary battery is provided with a lead film, to the packaging material between the pouch and the electrode lead, and the lead film includes parts of the excess to be far form the extended portion length. At this time, the lead film can include a notch on both sides of the portion shown by the pouch exterior outside to remove the excess portion.
[17]
In another embodiment of the present invention, the pouch type secondary battery further includes an insulation tape covering the extension length of the. The insulating tape may be a composite film having the adhesive layer on the PI film or a PP material.
[18]
The battery module according to the present invention for solving the other problems is configured, including such the pouch-shaped secondary battery.
[19]
The battery module according to the present invention is a pouch for a plurality of stacking the pouch type secondary battery including an extension to the electrode lead length to be cut out again welded between the electrode leads of the remaining length of the weld been welded between the electrode leads and the neighboring between the electrodes of the lead-type secondary battery which is welded.
[20]
In another embodiment of the invention, the electrode lead of the pouch type secondary battery included in the battery module is placed folded on the terrace of the pouch type secondary battery. The electrode leads may further include another insulating tape to the folded portion.
[21]
The addition for solving the other problems, a battery module recycling process according to the invention and is a method for recycling a battery module according to the present invention.
[22]
A plurality of battery modules recycling method aspect, the electrode lead of each other, including an extension to the electrode lead length to be cut, welded weld been re-welded between the electrode leads of the remaining length of the pouch type secondary battery according to the present invention a method of recycling the laminated pieces and the electrode lead of adjacent pouch type secondary battery in which the welding between the battery module, cut the welded portion of the battery module step; And a step of manufacturing a battery module to the other rearranging the pouch type secondary battery, and welding between the other electrode lead remaining.
[23]
The pouch type secondary battery is provided with a lead film between the electrode leads and the pouch exterior, the lead film, and includes a residue to be formed far extended portion the length, the lead film is said to be able to remove the redundant parts If that on both sides of the portion shown by the outer casing pouch comprises a notch, the method may further include the step of removing said excess portions after the step of cutting the welded portion of the battery module in front of or.
[24]
When further include an insulating tape for covering the extension is the length of the pouch type secondary battery may further include a step of removing the insulating tape, the welding portion is cut before or after the step of the battery module.
[25]
A plurality of battery modules further aspect of the recycling method, the electrode leads with each other, including an extension to the electrode lead length to be cut, welded weld back welding between the electrode leads of the remaining length of the pouch type secondary battery according to the present invention as it was laminated to one of said electrode leads welded to each other as a recycling of the battery modules based fold to the terrace of the pouch-type secondary battery, the electrode lead, to cut the welded portion of the battery module step; Step spreading of the electrode lead placed folded; And a step of manufacturing a battery module to the other rearranging the pouch type secondary battery, and welding the open electrode lead.
[26]
Furthermore, the present invention proposes also recycled to common battery module. This recycle method is a method of recycling a pouch type secondary battery in which the battery module between the electrode lead welding of the plurality of stacking the pouch type secondary battery and adjacent, to cut the welding in which the weld between the electrodes leads to step; Each step of the electrode welded to the electrode lead that remains for more lead lead length for the extension; And rearranges them the pouch type secondary battery includes a step of welding to each other the more the lead made of the other battery modules.
[27]
Here, the step of welding each of the electrode lead that remains for more leads to extend the length of the electrode lead is preferably performed by friction stir welding (friction stir welding).
Effects of the Invention
[28]
According to the present invention, it is possible to solve the problem, the electrode lead length on recycling of the pouch type secondary battery is insufficient constitute the battery module of the new connection structure, regardless of the serial / parallel connection structure.
[29]
According to an aspect of the invention, the recycling to the battery module through a structural change, which hold the electrode lead length of the pouch type secondary battery. It also cut the bonded portion by a laser welding, the remaining length of the electrode lead, which is sufficient, it is possible to connect to the pouch type secondary battery to be re-applied for the purpose of the second.
[30]
According to another aspect of the present invention, it is possible to bond the leads to the additional battery module including a conventional pouch type secondary battery to recycle the battery module by extending the length of the electrode lead.
[31]
According to still another aspect of the present invention, even if holding the electrode lead length of the pouch type secondary battery puts fold the electrode lead to the use of space. When the battery module is recycled by changing the series / parallel connection arrangement of unfolding the pouch type secondary battery based electrode lead fold can be recycled for the purposes of the second and so on ESS.
[32]
In this way, it is possible to make, according to the present invention facilitate the recycling of the battery modules including a pouch type secondary battery it is possible to take advantage of limited resources and maximize the cost effectiveness.
Brief Description of the Drawings
[33]
Intended to illustrate the following figures attached to the specification are exemplary of the invention, the components which serve to further understand the spirit of the invention and together with the description of which will be described later invention, the details of this invention is described in such figures be construed as limited only is not.
[34]
1 is a block diagram illustrating a typical pouch-type secondary battery.
[35]
2 is a side view of a conventional battery module.
[36]
Figure 3 is a view illustrating a pouch type secondary battery recycling is difficult points in the conventional battery module.
[37]
Figure 4 is a side view of a battery module including a pouch type secondary battery according to an embodiment of the present invention.
[38]
Figure 5 is a top view of a pouch type secondary battery according to an embodiment of the present invention.
[39]
Figure 6 is a top view of a pouch type secondary battery according to another embodiment of the present invention.
[40]
Figure 7 is a side view for illustrating a recycling method of a battery module including a pouch type secondary battery shown in FIG.
[41]
Figure 8 in Fig. 7 (a) is a step prior to the ready state the upper surface.
[42]
9 is a side view for illustrating a recycling method according to another embodiment of the present invention.
[43]
Figure 10 is a side view of a battery module including a pouch type secondary battery according to still another embodiment of the present invention.
[44]
11 is a side view for illustrating a recycling method of the battery module of FIG.
Mode for the Invention
[45]
With reference to the accompanying drawings, a description of a preferred embodiment of the present invention; Prior to this, the specification and are should not be construed as limited to the term general and dictionary meanings used in the claims, the inventor accordingly the concept of a term to describe his own invention in the best way It interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that can be defined.
[46]
Accordingly, the configuration shown in the examples and figures disclosed herein are in not intended to in the technical idea of ​​the present merely nothing but the embodiment most preferred embodiment of the present invention invention, a variety that can be made thereto according to the present application point It should be understood that there are equivalents and modifications.
[47]
Figure 4 is a side view of a battery module including a pouch type secondary battery according to an embodiment of the present invention.
[48]
Referring to Figure 4, the pouch type secondary battery 101 includes a plurality dogs are stacked and connected between the electrode leads (140, 145) provided to each of the two pouch-type secondary battery 101, the neighboring link to each other in series and / or parallel thereby it constitutes the battery module 111. Reference numeral 160 is a structure of the structural support to the battery module 111, such as Extrusions, reference numeral 150 is a lead film. Similar to the rough form is a pouch type secondary battery (1) of Figure 1 of a pouch type secondary battery 101, it is added in the pouch exterior 110, the electrode assembly is accommodated sealing seal is formed, the electrode leads (140, 145) are respectively welded to the positive electrode tab and negative electrode tab of the electrode assembly are exposed to the outside of the pouch exterior 110. Between the exterior pouch 110 and the electrode leads (140, 145) there is interposed a lead film 150. To the take-side electrode lead (140, 145) Once again, it is called a terrace (T).
[49]
Electrode lead (140, 145) is an in length compared to the electrode lead (40, 45) of a conventional pouch type secondary battery (1) described with reference to Figures 1 to 3 is also increased. Electrode lead (140, 145) comprises an electrode lead (140, 145) extending in length to each other to cut the welding portion (A) again been welded welding between the electrode leads of the remaining length 141. Length extension part 141 is discarded in length, when a new welding in consideration of the required length and the process margin may determine the size (d), the welding apparatus currently in use and the pouch-shaped secondary cell structure while cut the weld when considering the length of the extension portion 141. when the size is about 7mm or more. A length of the extension portion (d) a difficult alignment of the welding apparatus for the welding has a portion remaining after the cutting electrode lead (140, 145) is smaller than 7mm than the problem. Since the length of the extension portion 141 is too large, due to the electrode leads (140, 145) increase the spatial volume of the battery module 111 is disadvantageous when considering the energy density. When taking into account this situation, the size (d) of the length of the extension portion 141 is preferably 8mm or less than 15mm.
[50]
Such a pouch type secondary battery 101 according to one embodiment of the present invention, the battery module 111 is used after the electrode leads (140, 145) with each other welding the electrode lead part of the remaining even cut and welded part (A) been welded it is that for reuse to connect the pouch type secondary battery 101, increases as compared to the length electrode lead (140, 145) in the prior art. In this way the present invention, the laser welding to manufacture a pouch type secondary battery 101, by increasing the length, and after them together laminated bending the electrode leads (140, 145) of the electrode leads (140, 145) as compared to the conventional ( by bonding to L) it proposes to manufacture the battery module 111. That is, the battery module 111, the electrode leads (140, 145), said electrode lead (140, 145) to be put together to cut been welding weld zone (A) re-welding between the electrode leads of the remaining length of the present invention the length of the extension portion 141 is a pouch-type secondary battery 101, a plurality of stacked and adjacent electrode lead of the pouch type secondary battery 101 to the containing it in which the welding together (140, 145).
[51]
Because it contains a long extension (141) in the case of which a battery module increased in comparison to the length electrode lead (140, 145) in the prior art, when the contact length of an unwanted between the elongated electrode lead (140, 145) made of the problem of the short circuit have. In the present invention, by increasing able to also cover the extension portion 141 is long in length of the insulating film 150 to secure the insulating property.
[52]
Figure 5 is a top view of a pouch type secondary battery according to an embodiment of the present invention.
[53]
To address the insulation problem when using the battery module 111 due to the increase in length of the electrode lead (140, 145), the length of the pouch exterior 110, the lead film 150 coming out of the pouch type secondary battery 101 increases may form a rowing whether 151. the Ying whether 151 can be formed to cover the extension portion 141, the length. That is, the lead film 150 is to increase the area surrounding the electrode lead (140, 145) to secure the insulating property. After use, the battery module 111 may be removed if Ying 151. It can be placed to form a notch (N) on either side of the lead film 150 to facilitate removal if Ying 151. Notch (N) keeps the cutting line in place of or piercing the incision corresponding to the perforated portion can be placed may be formed in advance.
[54]
Notch (N) may be formed as shown a plurality pieces, and may be formed only one. Notch (N) shape may be semi-circular, circular, U-shaped or V-shaped. Notch (N) may be included on both sides of the portion in which the lead film 150 is on the outside of the pouch exterior 110.
[55]
Lid film 150 may be not only to prevent a short circuit between the metal layer of the electrode leads (140, 145) and the pouch exterior 110, improve the sealability of the exterior pouch 110. The pouch exterior 110 of polymer material and the electrode leads (140, 145) of a metal and the contact resistance during heat-sealing has a rather large surface adhesion may be degraded. However, if, the lead film 150 is provided as in the embodiment, such adhesion degradation can be prevented. In addition, the film lid 150, it is preferable that the block to be the current to the exterior pouch 110 is applied to the electrode lead (140, 145) of an insulating material. Lead film 150 is formed of a film having insulating properties and heat-sealable. Lead film 150, for example, polyimide (Polyimide, PI), polypropylene (PP), polyethylene (PE) and polyethylene terephthalate (Polyethylene terephthalate, PET), which at least one material layer (single layer or multiple selected from such It may be formed of a film). In this embodiment, it is gyeomhage serve to prevent such a lead film 150 by increasing the length of the pouch exterior 110, an outer electrode lead of paragraph (140, 145) portion exposed.
[56]
Thus, the pouch type secondary battery 101 according to one embodiment of the invention the length of the length of the lead film 150 of the electrode lead (140, 145), is cut when recycled missing length and additional welding necessary portions will by considering the length of such an increased than the conventional, the recyclable battery module 111 including such a pouch type secondary battery 101.
[57]
Figure 6 is a top view of a pouch type secondary battery according to another embodiment of the present invention.
[58]
6, a lead film (150) above or the electrode lead (140, 145), further insulating the elongated electrode lead length by attaching a tape (155) on exiting the outer pouch exterior 110 of the pouch type secondary battery (140, 145) may be secured to the insulating property. Insulating tape 155 may be a length that covers the extension portion 141. In addition, insulation tape 155 may be a PI or PP. Specifically, it may be a composite film having the adhesive layer such as an epoxy adhesive on the PI film or a PP material. Additional insulating tape 155 provides additional insulation in the region in order to cut the insulation problems likely due to a long electrode lead (140, 145). After the battery module 111, modules may remove the insulating tape 155 (and if the lead film portion surplus to whether Ying). Insulating tape 155 may be removed through a simple operation to strip from the electrode lead (140, 145).
[59]
Figure 7 is a side view for illustrating a recycling method of a battery module including a pouch type secondary battery shown in FIG. Figure 8 in Fig. 7 (a) is a step prior to the ready state the upper surface.
[60]
The battery module 111 can be applied to various fields. Examples power tool (Power Tool); Electric vehicle including the EV (Electric Vehicle, EV), hybrid electric vehicles (Hybrid Electric Vehicle, HEV), and plug-in hybrid electric vehicles (Plug-in Hybrid Electric Vehicle, PHEV); Electric trucks; Electric commercial vehicles; Or the power storage may be used as any one or more of the middle- or large-sized devices for the power supply of the system. After the end-of-life use as desired object, a battery module 111 may be recycled through the recycling process according to the invention.
[61]
7, is cut to a recycling first (a) welding portion (A) in the conventional battery module 111 been between electrode leads (140, 145), such as welding along a cutting plane (C). At this point, you can begin preparing the same state as in Fig. That is, Ng whether 151 described in 5, or remove the insulating tape 155 is described in Figure 6, first, even in the presence of normal length as the pouch exterior 110, a lead film (150 ') protruding out of the left You may perform the steps of: (a) 7. Of course, step but may Oden in any order of (a) or (b) before or after the step 7 to remove the insulating tape 155 described Ying whether (151) or in FIG. 6 described in FIG.
[62]
After also cutting out the junction (A) as in the 7 (a) is, (b) the rest of the electrode lead that remains as in the rearrangement and (c) a pouch type secondary battery 101, as shown in (140 ' , 145), a new welding (L with each other), to be prepared to a new battery module 211. Specifically, the use of the other electrode lead (140 ', 145') remaining intact, and then place the new structure (165), bending the other electrode lead (140 ', 145') and welded to come into contact with each other portion bent (L conduct '). In this way, by rearrangement and reconfiguration of the pouch type secondary battery 101 can be recycled to a new battery module 211.
[63]
On the other hand, even increasing the length of the electrode lead, as described in 4, the space within the electrode lead part of the first module using the battery occupies increases can have an adverse effect such as decrease hematocrit. The length extension (141) size may be more desirable, if the battery module is recycled to the line can be selected as much as possible in consideration of the floor area ratio, but this does not alter the floor area ratio. The following embodiment relates to a way to recycle the battery module without increasing the length of the electrode lead.
[64]
9 is a side view illustrating a battery module recycling method according to another embodiment of the present invention.
[65]
Of Figure 9 (a) is a side of a general battery module 11, as shown on the battery modules, for example, Figure 2 including a conventional pouch type secondary battery. After use, the battery module 11 as the original object, in accordance with a sectional plane (C) cut and welded part (A) made of the same state as (b). Remaining electrode lead (40 ', 45 ") long is very short to accept. According to the present invention, there is proposed to each weld (L " ') to the electrode lead length additional leads for the extension (41) and (46) a left electrode lead (40', 45 '), which with one extension as the electrode lead length this then, (c) refer to, additional leads (41, 46) for bending, the structure 165, placement and for a new battery module configured to carry out welding (L ") between the additional lead (41) and (46), the pouch-shaped by rearrangement and reconfiguration of the secondary battery (1) to be recycled as a new battery module 311.
[66]
According to this embodiment, without increasing the length of the first battery module manufacturing lead electrode it can be recycled to the battery module. However, since the minimum length that can be welded to the welding portion after the cut-out is added to the lead to secure it is more preferable to use in the electrode lead in length than a typical pouch-type secondary battery using the conventional even slightly longer. There electrode lead length extending the various welding methods when adding lead (41) and (46) a left electrode lead (40 ', 45'), each welding (L " ') to be used for, if the friction stir welding (friction stir If performed in welding) it is advantageous because it can have a welding width of less than 1mm.
[67]
Friction stir welding the bonding target (in this embodiment, additional leads (41, 46) and the remaining electrode lead (40 ', 45') joined by inserting a tool, by agitation of the column and the tool caused by the friction by rotating the target in the heated and softened, and the plastic flow bonding target is a solid phase bonding, for example, a welding method of welding together in the junction region. the friction stir welding is more leads (41, 46) and the remaining electrode lead (40 ', 45') with that is how even have the excellent advantages that, compared to not melt the molten weld characteristic of the weld joint by the yirueojim in the solid state.
[68]
Figure 10 is a side view of a battery module including a pouch type secondary battery according to still another embodiment of the present invention.
[69]
Referring to Figure 10, it corresponds to the electrode lead length so can be reused by connecting the pouch type secondary battery to the electrode lead part of the remaining cut and after use the battery module welding portion in the case is increased as in the first embodiment of the previous example.
[70]
That is, with reference to Figure 4 is described pouch-type secondary battery 101 is included in the battery module 121. The pouch type secondary battery 101 is improved capacity and an output being a plurality dogs are stacked and connected between the electrode leads (140, 145) provided to each of the two pouch-type secondary battery 101, the neighboring link to each other in series and / or parallel that constitutes the battery module 121. Reference numeral 160 is a structure similar to the above, the structural support to the battery module 121, such as Extrusions.
[71]
Electrode lead (140, 145) are respectively welded to the positive electrode tab and negative electrode tab of the electrode assembly are exposed to the outside of the pouch exterior 110. To the take-side electrode lead (140, 145) Once again, it is called a terrace (T).
[72]
At this time, the electrode lead (140, 145) increases the length is folded to a couple of example features terrace (T) of the pouch type secondary battery 101, the point that the width reduction embodiment. And a terrace (T) and the folded superimposed electrode lead secured in insulation to prevent a short circuit if the there between (140, 145) structure is required, indicated in the drawing by the reference numeral 170. Isolated securing structure 170 is the length increases as described above Ying whether 151 the lead film 150 and the insulating tape obtained by step by step folding the electrode lead (140, 145) to a state which is provided to 155 with that may be, after folding the electrode lead (140, 145) may be secured to the other winding an insulating tape. The battery module 121 of the structure shown in Fig. 10 is a counterpart (e.g., the cartridge for securing the pouch type secondary battery 101 to a fixed housing the electrode lead (140, 145) superimposed folded on a terrace (T) changing the like) of the shape or may be complicated compared with the prior art. However, it is preferable because the space utilization / isolated / secondary utilized to secure the possibility.
[73]
11 is a side view for illustrating a recycling method of the battery module of FIG. Cut out the welded part (A) along a cutting plane (C), as shown in after use the battery module (121) (a), expand the fold you wrote electrode lead as in (b). Then, (c) and the like and the electrode lead (140 ', 145') bending, and structure 165 disposed and the electrode lead (140 ', 145'), welding (L ") to each other the like in an embodiment a pouch type by rearrangement and reconfiguration of the secondary battery 101 to be recycled to a new battery module 211.
[74]
Of course it is also possible before the method of Example recycled in combination with each other or by applying the above. In this way it is possible, according to the present invention to solve the problem, the electrode lead length on recycling of the pouch type secondary battery is insufficient to constitute the battery module of the new connection structure, regardless of the serial / parallel connection structure.
[75]
Thus, the present invention proposes a battery module recycling method. The first battery module, for example to be used as such as an automobile battery, then the lifetime of the object bar exhausted may be made of the other battery module, the pouch type secondary battery through the recycling method reordering and re-dissolve in contact with, as proposed by the present invention have. The newly manufactured battery module has a capacity retention rate and other conditions can be used as the second ESS applications, such as less stringent than the car battery. Thus, according to the present invention it can be reused without discarding the limited resources through recycling of the battery modules are environmentally friendly and cost-effective aspects.
[76]
As it described above, but it should be understood that the detailed description and specific examples, the invention is not limited thereto under the technical scope of the present invention by one of ordinary skill in the art various modifications and variations within the equivalent scope of the claims to be described is possible as a matter of course.

Claims

[Claim 1]In the neighboring other pouch type
secondary battery pouch type secondary battery of the electrode lead and their electrode leads are welded to each other constitute the battery module in which electrode leads between the welding was cut weld weld been among the electrode leads of the remaining length again be a pouch-type secondary battery, comprising an extension to the electrode lead to be long.
[Claim 2]
The method of claim 1, wherein the pouch type secondary battery is provided with a lead film between the pouch casing and the electrode lead, the lead film pouch type secondary, characterized in that including a surplus to be formed far extended portion in the longitudinal battery.
[Claim 3]
The method of claim 2, wherein the lid film is a pouch-type secondary battery, comprising a notch on either side of the portion shown by the pouch exterior outside to remove the excess portion.
[Claim 4]
The method of claim 1, wherein the pouch type secondary battery according to claim 1, further comprising an insulating tape which covers parts of the extended length.
[Claim 5]
The electrode lead of the electrode leads of the pouch type secondary battery of a plurality of stacked and adjacent the pouch type secondary battery including an extension to the electrode lead lengths to be put together to cut the welding welds been re-welded between the electrode leads of the remaining length the battery module, characterized in that that the welding together.
[Claim 6]
The method of claim 5, wherein the electrode leads of the battery module, characterized in that based fold to the terrace of the pouch type secondary battery.
[Claim 7]
6. The method of claim 5 or 6, characterized in that it comprises the pouch type secondary battery is a pouch packaging material and provided with a lead film between the electrode lead, the lead film portion excess so that it can be formed as far as the extension portion in the longitudinal battery module.
[Claim 8]
The method of claim 7, wherein the lid film battery module comprises a notch on each side of the portion shown by the pouch exterior outside to remove the excess portion.
[Claim 9]
In the fifth or 6, wherein the battery module further comprises an insulation tape for covering parts of the extending length.
[Claim 10]
The method of claim 6, wherein the battery module, characterized in that the electrode lead is further comprising another insulating tape to the folded portion.
[Claim 11]
The electrode lead of the electrode leads of the pouch type secondary battery of a plurality of stacked and adjacent the pouch type secondary battery including an extension to the electrode lead lengths to be put together to cut the welding welds been re-welded between the electrode leads of the remaining length a method of recycling the battery module was welded to each other, the step of cutting the welded portion of the battery module; And recycling method comprising the step of producing to the pouch type secondary battery rearrangement and left another battery module to the other electrode leads welded to each other in the.
[Claim 12]
12. The method of claim 11, wherein the pouch type secondary battery is provided with a lead film between the pouch casing and the electrode lead, and the lead film, and includes a residue to be formed far extended portion the length, the lead film is the residue to remove parts including a notch on both sides of the portion shown by the pouch exterior outside, recycling according to claim 1, further comprising the step of removing parts of the residue after the step of cutting the welded portion of the battery module to the front or Way.
[Claim 13]
12. The method of claim 11, wherein the pouch type secondary battery is characterized in that it comprises further an insulating tape for covering the extension the length, removing the insulating tape, the weld pruning step before or after the battery module further how to recycle a.
[Claim 14]
Electrode leads together while it was in the plurality of stacking the pouch type secondary battery including an extension to the electrode lead length of the electrode lead to be cut, welded weld back welding between the electrode leads of the remaining length between welding the a method recycling of the battery modules based fold the electrode lead to the terrace of the pouch type secondary battery, comprising: cutting off the welded portion of the battery module; Step spreading of the electrode lead placed folded; And recycling method comprising the steps of manufacturing to the other battery modules to the rearranged a pouch type secondary battery, and welding the open electrode lead.
[Claim 15]
A method of recycling between the pouch type secondary battery of the electrode leads of the plurality of pouch type secondary battery of the battery module having stacked and adjacent welding, the welding was cut weld between the electrodes leads to step; Each step of the electrode welded to the electrode lead that remains for more lead lead length for the extension; And recycling method that rearranges said pouch type secondary battery and characterized in that it comprises the step of welding together said additional lead made of the other battery modules.