KR101472613B1 - Middle or large sized battery pack and packaging method thereof - Google Patents

Abstract

The present invention relates to a middle- or large-sized battery pack having improved safety and space utilization, and a method of packaging the battery pack. The battery pack is firstly packaged using a pouch-type packaging material or the like, laminated and packed with a high- And a bottom surface thereof is packaged with a material which can be assembled into a pack immediately, thereby improving the safety and space utilization while having all the advantages of pouch-type packaging material and metal packaging material, etc., and a packaging method thereof.
The packaging method of the present invention is a middle- or large-sized battery pack in which the packaging process of a battery is easily improved, space utilization is maximized, light and compact, each cell is firmly fixed inside and safety is further improved, and a packaging method of a middle- or large- to provide.

Description

[0001] The present invention relates to a middle- or large-sized battery pack and a packaging method thereof,

The present invention relates to a middle- or large-sized battery pack having improved safety and space utilization, and a packaging method thereof. More particularly, the present invention relates to a middle- or large- To a middle- or large-sized battery pack having improved safety and space utilization by efficiently packaging a secondary battery with a plastic tube and a material capable of assembling the battery pack into a module case, and a packaging method therefor.

In recent years, lithium secondary batteries, which can be charged and discharged, have been widely used as energy sources for wireless mobile devices. Also, they are being used as a means of solving air pollution in existing gasoline vehicles and diesel vehicles using fossil fuels. Automobiles, and hybrid electric vehicles (HEVs).

Particularly, middle- or large-sized devices such as electric vehicles use middle- or large-sized battery systems in which a large number of battery cells are electrically connected due to the necessity of a high output large capacity. As a required output amount and energy density are gradually increased, Is gradually increased.

The pouch-type lithium ion polymer secondary battery, which is often used as a unit cell in such a middle- or large-sized battery system, has a relatively large size as compared with a battery of the same type used in a small-sized device. Also, when designing a pack for a medium-sized lithium secondary battery used as a power source for an electric vehicle, a plug-in, and a hybrid vehicle, a high capacity as well as a high output power must be considered. For this purpose, a large number of unit cells are currently used in a single lithium rechargeable battery, so that the number of unit cells gradually increases in one battery or the cell size becomes very large.

Therefore, in the case of a lithium secondary battery used as a power source for medium to large-sized devices, the packaging process is complicated and the thickness of the packaging is increased. As a result, the effect of the lithium secondary battery is reduced due to difficulties in the manufacturing process, There is a possibility that a problem of degradation may occur.

Therefore, in a cell packaging method for making a battery pack of a large capacity, there is a real need for a simple and efficient research on a packaging method of a lithium secondary battery.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a battery pack for a battery pack, which can easily package a plurality of battery cells and unit modules, Sized battery pack and a method for packaging the same, which maximize the utilization of the internal space at the time of assembling the pack and have improved safety.

In order to solve the above problems, the present invention uses the following means.

The present invention relates to a method of packaging a lithium secondary battery pack,

A first step of firstly packaging a battery cell including an electrode assembly and an electrolyte;

A second step of secondary packaging the body part of the unit module in which the plurality of primary cells are laminated;

Packaging the top and bottom surfaces of the unit module; And

And arranging the unit modules according to the three steps in a module case.

The packaging material for the first-stage packaging in the first step is characterized by packaging using a pouch-type packaging material made only of a thermoplastic resin that is not dissolved in an electrolyte, and the thermoplastic resin not soluble in the electrolyte is selected from the group consisting of PE (polyethylene), PP Propylene), PS (polystyrene), PVC (polyvinyl chloride), nylon (polyamide), and PET (polyethylene terephthalate).

The packaging material for the first-stage packaging of the first stage is a pouch-type packaging material containing a metal laminate layer and a thermoplastic resin which is not dissolved in the electrolyte solution outside the metal laminate layer. Aluminum metal laminate layer.

Meanwhile, the secondary packaging in the second step is characterized by packaging with a plastic pipe or a metal pipe having open end surfaces corresponding to the upper end surface and the lower end surface, wherein the plastic pipe is made of PE (polyethylene), PP Wherein the metal tube is made of one selected from the group consisting of aluminum, iron, nickel, copper, or an alloy thereof. It is characterized in that it is made of any one of them.

The packaging material for packaging the upper surface or the lower surface of the unit module according to the above three steps is a protection circuit or a PTC circuit.

The area of the protection circuit or the PTC circuit is equal to or equal to the size of the cross section of the plastic pipe or the metal pipe, .

The fourth step is characterized in that the unit modules are arranged vertically such that the protection circuit or the PTC circuit attached to the upper surface or the lower surface of the unit module touches the bottom surface of the module case.

According to another aspect of the present invention, there is provided a battery pack comprising: a battery cell packaged with a primary packaging material including an electrode assembly and an electrolyte;

The battery cell is laminated and the body part is packaged as a secondary packaging material. The surface opposite to the surface on which the electrode tab is located is packaged by a protection circuit or a PTC circuit. The surface on which the electrode tab is located is packed with a unit module ; And

A module case including a plurality of unit modules;

And a battery pack.

Wherein the primary packaging material is a pouch-type packaging material made of only thermoplastic resin which is not dissolved in the electrolyte solution

The thermoplastic resin which is not soluble in the electrolytic solution may be any one selected from the group consisting of PE (polyethylene), PP (polypropylene), PS (polystyrene), PVC (vinyl chloride), nylon (polyamide), and PET (polyethylene terephthalate) .

The primary packaging material is a pouch-type packaging material containing a metal laminate layer and the outside of the metal laminate layer being made of a thermoplastic resin that is not dissolved in the electrolyte solution

Wherein the metal laminate layer is an aluminum metal laminate layer.

The secondary packaging material is characterized by being a plastic pipe or a metal pipe having openings at both end surfaces corresponding to the upper end surface and the lower end surface.

Wherein the plastic tube is made of any one selected from the group consisting of PE (polyethylene), PP (polypropylene), PS (polystyrene), PVC (vinyl chloride), acrylic resin, , Copper, or an alloy thereof.

The area of the protection circuit or the PTC is equal to the size of the cross section of the plastic pipe or the metal pipe, .

And the unit modules are vertically arranged so that the protection circuit or the PTC circuit attached to the upper surface or the lower surface of the unit module contacts the bottom surface of the module case.

The middle- or large-sized battery pack includes a power tool; An electric vehicle including an electric vehicle (EV), a hybrid electric vehicle (HEV), and a plug-in hybrid electric vehicle (PHEV); Electric motorcycle including E-bike, E-scooter; Electric golf cart; Electric truck; And is used as a power source of an electric commercial vehicle.

The method for packaging a middle- or large-sized battery pack according to the present invention can simplify the packaging step of a middle- or large-sized battery pack used as a power source for a hybrid electric vehicle or the like, while maintaining merits of existing packaging materials, ≪ / RTI >

In addition, in the middle- or large-sized battery pack in which the unit cells and the unit modules are more firmly fixed inside the battery pack while being light and compact by maximizing the space utilization in assembling the pack, and are frequently exposed to frequent vibration or strong shock, An improved battery pack and a manufacturing method thereof are provided.

1 is a perspective view schematically showing a battery cell for packaging an electrode assembly and an electrolyte solution as a primary packaging material.
FIG. 2 is a perspective view of a unit module in which a plurality of battery cells are stacked and a body portion is packaged in a secondary packaging material, as viewed from the upper surface.
FIG. 3 is a perspective view of a unit module in which a plurality of battery cells are stacked and a body portion is packaged in a secondary packaging material, as viewed from the lower end.
4 is a perspective view illustrating a step of packaging a lower end of a unit module in which a body part is packaged with a secondary packaging material.
FIG. 5 is a perspective view of a unit module having a body part and a bottom surface packaged as viewed from the lower end.
6A to 6C are perspective views illustrating a step of packaging the upper surface of the unit module according to connection forms of a plurality of battery cell taps.
FIGS. 7A to 7C are perspective views of a unit module in which packaging is completed according to a connection form of a plurality of battery cell taps. FIG.
8A to 8C are perspective views schematically showing a state in which a packaged unit module is arranged in a module case according to a connection form of a plurality of battery cell taps.

According to an aspect of the present invention, there is provided a method of packaging a middle- or large-

A first step of firstly packaging a battery cell including an electrode assembly and an electrolyte;

A plurality of the firstly packaged battery cells are stacked or connected in parallel Or serial connection to form a unit module and secondly packaging only the body part except for the upper and lower ends;

A third step of packaging upper and lower ends of the second packaged unit module; And fixing the packaged unit modules with the upper and lower ends to the module case and assembling the packs.

An object of the present invention is also to provide

A battery cell packaged with a primary packaging material including an electrode assembly and an electrolyte;

A unit module in which the battery cells are stacked, a body portion is packaged in a secondary packaging material, and the top and bottom surfaces are packaged; And

A module case including a plurality of unit modules connected thereto; And a middle or large-sized battery pack.

Hereinafter, a method of packaging a battery pack of the present invention will be described with reference to the drawings, and a structure of the present invention will be described.

Fig. 1 is a perspective view schematically showing a battery cell 13 in which an electrode assembly 11 and an electrolyte solution are packaged with a primary packaging material 20. Fig.

In the first step, the electrode assembly 11 and the battery cell 13 including the electrolyte are firstly packaged using the pouch-type packaging material 20 or the like as a first step.

The pouch-type packaging material 20 for the primary packaging is satisfactory if it is made of a thermoplastic resin that does not dissolve in the electrolytic solution. For example, PE (polyethylene), PP (polypropylene), PS (polystyrene) , nylon (polyamide), and PET (polyethylene terephthalate).

In addition, the pouch-type packaging material 20 may be a pouch-type packaging material in which a metal laminate layer such as an aluminum laminate is further embedded in addition to the thermoplastic resin.

The pouch-type packaging material for the primary packaging may be a pouch-type packaging material in which the metal laminate layer is further embedded, or a pouch-type packaging material made of the thermoplastic resin alone, depending on the material of the secondary packaging material described below. That is, if the secondary packaging material for the second-stage packaging is a material capable of permeating moisture and electrolytic solution, the primary packaging material, that is, the pouch-type packaging material, is preferably packaged using the pouch-

In the case of the pouch-type packaging material in which the metal laminate layer is further embedded, the outside of the metal laminate is coated with the thermoplastic resin, It does not penetrate.

In the present invention, the electrode assembly 11 housed in the primary packaging material 20 can have various structures such as a stacked (stacked) structure and a jelly-roll (wrapping) structure.

Generally, the secondary battery is classified into a lithium ion battery, a lithium ion polymer battery, and a lithium polymer battery depending on the structure of the electrode assembly, the configuration of the electrolyte, etc. Among them, the manufacturing cost is low and the leakage of the electrolyte is low, This simple lithium ion polymer battery can be preferably used in the present invention.

One end of the electrode lead 12 is positioned inside the pouch-type packing material with the electrode tabs of the electrode assembly attached, and the opposite end is exposed to the outside of the pouch-type packing material. Of the electrode leads, the positive electrode lead is not particularly limited and a metal foil made of aluminum which can be generally used can be used, and a negative electrode lead can also be used, such as a metal foil made of generally used copper. The electrode tabs may be bonded to the electrode leads by a commonly used method such as spot welding, and the thickness of the electrode leads is preferably about 200 to 500 μm.

The lithium secondary battery of the present invention is characterized in that the electrode assembly 11 of a positive electrode / separator / negative electrode in which an electrolyte is impregnated in the pouch type packaging material 20 is placed, and a high temperature and a high pressure are applied to the bonding portion of the pouch type packaging material Seal it.

As described above, the primary packaging of the battery cells is packaged by using a thermoplastic resin or the like, and when the gas is generated in the cell due to the use of the battery and a safety accident, the polymer pouch- So that the risk of the generation of gas during use can be prevented, and the battery cell is firstly packaged with the flexible pouch-type packaging material first so that the leakage of the electrolyte solution and the contact between the battery cell and the metal packaging material And to prevent the insulation phenomenon caused by the insulation.

In addition, depending on the material of the secondary packaging material, one of the polymer pouch-type packaging material or the polymer-only pouch-type packaging material containing the metal laminate layer may be selected and packaged to improve the safety of the battery and to provide a compact, hard and light lithium secondary battery .

The thickness of the pouch-type packaging material 20 is not particularly limited, but is preferably 150 to 200 占 퐉 in consideration of durability, space utilization, or weight of the battery.

In the meantime, according to the packaging method of the present invention, a plurality of primary cells packed by the pouch-type packaging material are stacked in order, and only the body part of a plurality of stacked unit cells, Secondary packaging.

2 and 3 are perspective views illustrating a state in which only the body portion 22 of the unit module is secondarily packaged.

In the unit module in which the plurality of battery cells are laminated, a surface on which the electrode leads 12 protrude is referred to as a top surface 24, a surface opposite to the top surface 24 is referred to as a bottom surface 26, The portion made up of the other surfaces except the surface 26 is referred to as a body portion 22.

In the second step of the lithium secondary battery packaging method of the present invention, only the body part 22 of the unit module is first packaged. To this end, the unit module in which the battery cells are stacked is directly inserted using a secondary packaging material such as a plastic pipe or a metal tube 30 having both end faces corresponding to the top face 24 and the bottom face 26 opened.

Only the body portion of the unit module composed of the plurality of primary cells packaged in this manner is secondarily packaged with the metal tube 30 or the plastic tube to thereby make the outside of the first package of the pouch- Can be fixed firmly with plastic tube.

By securing the outer surface of the unit module firmly by secondary packaging using the packaging material having a higher strength as described above, excessive swelling of the pouch-type packaging material 20 is suppressed and the outer surface of the battery is tightly packed, It is possible to protect the battery from an external impact or the like, and the unit cell or the unit module can be structurally and securely fixed therein.

In addition, since only the body part is secondarily packaged using the open metal pipe 30 or the plastic pipe, the unit corresponding to the upper end surface 24 and the lower end surface 26 is simply packaged, So that it can be made easier and easier.

The metal tube 30 for the secondary packaging may be made of any one selected from the group consisting of aluminum, tin, chromium, iron, nickel, copper and alloys thereof. The plastic tube may be PE (polyethylene) Propylene), PS (polystyrene), PVC (vinyl chloride), acrylic resin, and the like. Preferably, however, a metal tube made of aluminum is used as the secondary packaging material. This is because the pouch-shaped packaging material has a strength that can most effectively prevent swelling of the pouch-shaped packaging material but is light in weight. FIG. 2 and FIG. 3 show a case where the secondary packaging material is used as the metal pipe 30 according to one embodiment of the present invention.

When the metal pipe 30 such as aluminum is used as the secondary packaging material as described above, it is preferable that the primary packaging material is a pouch-type packaging material not containing the metal laminate. In this case, it is possible to prevent the protrusion of the metal laminate layer, which may be generated by cutting the sealing edge of the pouch-type packaging material after the first packaging, and the insulating phenomenon of the battery due to the protrusion, but also the strength of the casing is high and the swelling phenomenon is effectively suppressed Which can provide lithium secondary batteries.

The thickness of the metal tube 30 or the plastic tube is not particularly limited, but is set within a range of 250 μm to 2 mm in consideration of the utilization of the internal space of the battery and the weight of the whole battery.

In the case of a small prismatic battery, a can type packing material having a thickness of about 200 to 250 μm is generally used, but it is difficult to suppress the swelling phenomenon of the battery. Also, considering the heat transfer inside the battery, .

2 and 3, the shape of the metal tube 30 is a quadrangle. However, the present invention is not limited to this, and the shape of the metal tube or the plastic tube may be various shapes such as a square shape or a circular shape.

On the other hand, after the body part 22 of the unit module is secondarily packaged, the upper end surface 24 and the lower end surface 26 of the opened unit module are packaged.

FIGS. 4 to 7C illustrate a method of packaging the upper end surface 24 and the lower end surface 26 of the unit module. FIGS. 6A to 6C and FIGS. 7A to 7C show a method of packaging the upper end surface And the electrode tabs protruded from the electrode tabs are different from each other.

The lower end surface 26 of the unit module of the present invention can be packaged using a metal plate or a plastic plate made of the same material as the secondary packaging material packed with the body portion, but it is preferable to use a protective circuit or a PTC circuit, .

4, the bottom surface 26 of the unit module is covered with a protection circuit 40 or a PTC circuit included in the packaging of the lithium secondary battery, It can be sealed to be combined with a metal pipe or a plastic pipe.

The area of the protection circuit 40 or the PTC circuit used at this time is designed to be equal to or larger than the area of the top surface 24 or the bottom surface 26 by 0.2 mm to 2 cm. This is because the bottom surface 26 packaged with the protection circuit 40 or the PTC circuit is fixed to the bottom of the module case when the unit modules having both ends of the both ends are completely arranged in the module case in series, So that the unit modules can be more securely and firmly fixed in the module case. Therefore, as the area of the protection circuit 40 or the PTC circuit attached to the bottom surface 26 is wider, the assembled cells can be more stably fixed and thus safe.

5 is a perspective view illustrating a state in which the lower end surface 26 of the unit module is sealed with the protection circuit 40 having a larger area.

As a result, it is possible to provide a more secure middle-sized lithium secondary battery in terms of structure in a lithium secondary battery for power supply of a medium and large-sized device with many shocks or fluctuations.

The adhesive for sealing the protection circuit 40 or the PTC circuit and the metal pipe 30 or the plastic pipe is not particularly limited and may be sealed using an acrylic resin, polyethylene, polyester resin, or the like, It is also possible to melt and seal.

In addition, the lower sealing portion of the secondary packaging material of the unit module, that is, the portion where the protection circuit or the PTC circuit is adhered to the metal pipe or the plastic pipe can be easily vented than other portions of the secondary packaging material It can be a passage through which the internal gas can be discharged to the outside. That is, the secondary packaging materials of the body portion, the upper surface, and the lower surface of the unit module are packaging materials made of a material having a high strength that does not easily swell and gas is difficult to be vented. In addition, the body part where the internal gas is generated is guided so that the metal tube or the plastic tube with high strength is firmly caught, so that the gas generated inside is more The effect of applying pressure to be discharged to the outside and the effect of inducing gas to be vented toward the lower sealing portion are provided. Such an effect can reduce the risk of explosion of the unit module due to the generation of gas in the battery cell, thereby providing a battery pack with improved safety. Therefore, the bonding strength between the secondary packaging material of the body part and the packaging material of the lower side is adjusted in consideration of the exhaust gas effect of the internal gas.

6A and 6B, the upper end surface 24 of the unit module is connected to one of the positive electrode leads 12a and the negative electrode lead 12b by connecting the respective electrode tabs protruded from the respective battery cells. So as to protrude.

In addition, when the taps are connected to form one electrode lead and then the top surface is packaged, there is an advantage that the packaging process can be simplified. However, in the case of the unit module including a plurality of battery cells, The amount of electric current to be applied to the positive electrode lead and the negative electrode lead of the unit cell may be excessive, and preferably, the unit module may be formed such that a plurality of electrode leads protrude as in the embodiment shown in FIG. 6C.

6A to 6C illustrate one embodiment of the present invention, and the present invention is not limited thereto. In view of simplification of the capacity of the unit module and simplification of the packaging process, Of course, be formed.

The upper end of the unit module is then packaged into a cap 42 designed to fix the electrode leads 12a, 12b out of the cell. The cap 42 is formed to have the same area as the top surface 24, and is not particularly limited as to the material thereof, and it is satisfied that a well-known assembly cap for battery packaging or the like is used. The cap 42 is an assembly cap including perforations corresponding to the shape and the number of electrode leads formed, and may be sealed or sealed in an upper portion using an adhesive.

7A to 7C are perspective views schematically showing the shape of a unit module having completed the packaging step of the second and third steps according to the lithium secondary battery packaging method of the present invention, Respectively.

On the other hand, the unit module in which the packaging of the body part 22 and the upper end surface 24 and the lower end surface 26 is completed is arranged in series in the module case.

8A to 8C are schematic perspective views of a configuration in which first and second packaged unit modules are arranged in series in a module case 50 according to an embodiment of the present invention. 8A to 8C show one embodiment of the arrangement of the unit modules, and the unit modules according to the present invention can be stacked or arranged in the module case in various forms, and in the embodiment, Although four unit modules are arranged in the module case 50, the present invention is not limited thereto, and the unit modules accommodated in the module case may also be configured to accommodate two, three, or more than two.

8A to 8C, the unit module is attached to the bottom surface of the module case 50 such that the protection circuit 40 or the PTC circuit attached to the bottom surface 26 is positioned downward, So that the protection circuit and the like are firmly fixed to the bottom of the module case 50. [

By packaging the lower end surface 26 of the unit module using the protection circuit 40 or the PTC circuit or the like as described above, as compared with the case where the protection circuit 40 or the PTC is located separately in a separate space when assembling the battery, It is possible to maximize the utilization of the internal space and to firmly fix the unit modules to the module case 50 without using a separate failure device, thereby providing a lightweight, compact and safe double- can do.

On the other hand, in the case where the electrode leads of the unit module by the secondary packaging are not all located on the upper surface but located in different directions, one of the both end surfaces on which the electrode lead is located is protected by a protection circuit or a PTC circuit The membrane is then sealed with a metal or plastic tube and adhesive. At this time, the adhesive used in the bonding is the same as the adhesive and the bonding method described above.

In such a case, the area of the protection circuit or the PTC circuit used for the packaging of the upper end surface or the lower end surface is designed to be 0.2 mm to 2 cm larger than the area of the upper or lower end of the metal pipe or the plastic pipe, The unit module is packaged.

The opposite side of the surface sealed with the protection circuit or the PTC circuit is formed by using a cap formed so that the electrode lead protrudes Packaging.

As described above, the unit modules having both ends packaged are also arranged in series in the module case. At this time, the packaged unit cells or the unit modules are arranged such that one side of the packaged unit cell or the unit module, which is narrower than the two faces on which the electrode leads are located, is in contact with the bottom of the module case. At this time, the protection circuit or the PTC circuit attached to either one of the left and right sides of the unit module arranged in the module case can be stably attached so as to come in contact with the side surface of the module case, .

The middle- or large-sized battery manufactured according to the packaging method of the present invention can be manufactured by combining a plurality of battery cells or unit modules according to a desired output and capacity. In consideration of the mounting efficiency and structural stability as described above, A hybrid electric vehicle, an electric motorcycle, an electric bicycle, and the like which have a mounting space and are exposed to frequent vibration and strong impact, but the scope of application is not limited thereto.

11: electrode assembly 12: electrode lead 13: battery cell
20: pouch type packing material 22: body part 24: upper surface
26: bottom surface 30: metal tube 40: protection circuit
12a: positive electrode lead 12b: negative electrode lead 42: cap
50: Module case

Claims (23)

In a method of packaging a lithium secondary battery pack,
A first step of firstly packaging a battery cell including an electrode assembly and an electrolyte;
A second step of secondary packaging the body part of the unit module in which the plurality of primary cells are laminated;
Packaging the top and bottom surfaces of the unit module; And
And arranging the unit modules according to the three steps in a module case,
The secondary packaging in the second step is to be packaged in a plastic tube or a metal tube having a thickness of 250 to 2 mm, both end surfaces corresponding to the upper end surface and the lower end surface,
The packaging material for packaging the upper or lower surface of the unit module according to the above three steps is a protection circuit or a PTC circuit,
Wherein the protection circuit or the PTC circuit is sealed to the plastic tube or the metal tube using an adhesive material such as an adhesive.
The method according to claim 1,
Wherein the packaging material for the first-stage packaging in the first step is packaged using a pouch-type packaging material made only of a thermoplastic resin that is not dissolved in the electrolyte solution.
3. The method of claim 2,
The thermoplastic resin which is not soluble in the electrolytic solution may be any one selected from the group consisting of PE (polyethylene), PP (polypropylene), PS (polystyrene), PVC (vinyl chloride), nylon (polyamide), and PET (polyethylene terephthalate) Wherein the secondary battery pack is a battery pack.
The method according to claim 1,
Wherein the packaging material for the first-stage packaging of the first stage is a pouch-type packaging material comprising a metal laminate layer and a thermoplastic resin which is not dissolved in the electrolyte solution outside the metal laminate layer.
5. The method of claim 4,
Wherein the metal laminate layer is an aluminum metal laminate layer.
delete The method according to claim 1,
Wherein the plastic tube is made of any one selected from the group consisting of PE (polyethylene), PP (polypropylene), PS (polystyrene), PVC (vinyl chloride), and acrylic resin.
The method according to claim 1,
Wherein the metal tube is made of any one selected from the group consisting of aluminum, iron, nickel, copper, and alloys thereof.
delete The method according to claim 1,
The area of the protection circuit or the PTC circuit is equal to or equal to the size of the cross section of the plastic pipe or the metal pipe, Wherein the first and second battery packs are packaged in the same manner.
The method according to claim 1,
Wherein the unit module is arranged vertically such that the protection circuit or the PTC circuit attached to the upper surface or the lower surface of the unit module contacts the bottom surface of the module case.
12. The method of claim 11,
Wherein the unit modules are positioned in the same direction as the electrode leads.
A battery cell packaged with a primary packaging material including an electrode assembly and an electrolyte;
The battery cell is stacked and a body part is packaged in a secondary packaging material. The lower end surface, which is a surface opposite to the upper end surface where the electrode tab is located, is packaged by a protection circuit or a PTC circuit, Unit module; And
A module case including a plurality of unit modules;
Lt; / RTI >
Wherein the secondary packaging material is a plastic pipe or a metal pipe having a thickness of 250 탆 to 2 mm and open at both end surfaces corresponding to the upper end surface and the lower end surface,
Wherein the protection circuit or the PTC circuit is sealed to the plastic tube or the metal tube by using an adhesive material such as an adhesive. Medium or large battery pack.
14. The method of claim 13,
Wherein the primary packaging material is a pouch-type packaging material made only of a thermoplastic resin that is not dissolved in an electrolytic solution.
15. The method of claim 14,
The thermoplastic resin which is not soluble in the electrolytic solution may be any one selected from the group consisting of PE (polyethylene), PP (polypropylene), PS (polystyrene), PVC (vinyl chloride), nylon (polyamide), and PET (polyethylene terephthalate) Wherein the battery pack is a battery pack.
14. The method of claim 13,
Wherein the primary packaging material is a pouch-type packaging material having a metal laminate layer embedded therein, and the outside of the metal laminate layer is a thermoplastic resin that is not dissolved in an electrolyte solution.
17. The method of claim 16,
Wherein the metal laminate layer is an aluminum metal laminate layer.
delete 14. The method of claim 13,
Wherein the plastic tube is made of any one selected from the group consisting of PE (polyethylene), PP (polypropylene), PS (polystyrene), PVC (vinyl chloride), and acrylic resin.
14. The method of claim 13,
Wherein the metal tube is made of any one selected from the group consisting of aluminum, iron, nickel, copper, and alloys thereof.
14. The method of claim 13,
The area of the protection circuit or the PTC is equal to the size of the cross section of the plastic pipe or the metal pipe, Wherein the battery pack is a battery pack.
14. The method of claim 13,
Wherein the battery pack is arranged such that the unit modules are vertically arranged so that the protection circuit or the PTC circuit attached to the upper surface or the lower surface of the unit module comes into contact with the bottom surface of the module case.
14. The method of claim 13,
The middle- or large-sized battery pack includes a power tool; An electric vehicle including an electric vehicle (EV), a hybrid electric vehicle (HEV), and a plug-in hybrid electric vehicle (PHEV); Electric motorcycle including E-bike, E-scooter; Electric golf cart; Electric truck; Wherein the battery pack is used as a power source for an electric commercial vehicle.

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