KR102090254B1 - Battery module and method for fabricating the same - Google Patents

Abstract

Provided is a simple and compact battery module that is securely fixed to a battery cell and a method of manufacturing the same. The battery module according to the present invention, two or more pouch-shaped battery cells; And a square tube mono frame accommodating the battery cells and forming a first opening and a second opening that are opened on both sides in the longitudinal direction of the battery cells, and a large area surface of the battery cell and a surface where the mono frame abuts. It is characterized by having a male / female velcro tape so that the battery cell is fixed to the mono frame by the male / female velcro tape combination.

Description

Battery module and method for fabricating the same}

The present invention relates to a battery module and a method for manufacturing the same, and more particularly, to a battery module and a method for manufacturing the battery module with improved fixing structure. The invention also relates to a battery pack comprising such a battery module.

A secondary battery having high applicability according to the product group and having electrical characteristics such as high energy density, etc. is not only portable devices, but also electric vehicles (EV, Electric Vehicle) or hybrid vehicles (HEV) driven by electric driving sources. It is used universally. These secondary batteries are attracting attention as a new energy source for eco-friendliness and energy efficiency enhancement, in that they do not generate any by-products due to the use of energy, as well as a primary advantage that can dramatically reduce the use of fossil fuels.

Currently widely used secondary batteries include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, and nickel zinc batteries. The operating voltage of the unit secondary battery cell, that is, the unit battery cell is about 2.5V to 4.2V. Therefore, when a higher output voltage is required, a battery pack may be configured by connecting a plurality of battery cells in series. In addition, a battery pack may be configured by connecting a plurality of battery cells in parallel according to charge and discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack may be variously set according to a required output voltage or charge / discharge capacity.

On the other hand, when a battery pack is configured by connecting a plurality of battery cells in series / parallel, a battery module composed of a plurality of battery cells is first configured, and other components are added to configure a battery pack using the plurality of battery modules. How to do this is common.

Here, the conventional battery module is provided with at least one cell cartridge in which at least one battery cell is mounted therein to guide the stacking of battery cells and prevent the flow of battery cells. In general, a plurality of such cell cartridges may be stacked to guide each other to guide the stacking of the plurality of battery cells. In a conventional battery module in which a battery cell is constrained using a cell cartridge, the movement of the battery cell is generally restrained by applying pressure to the surface direction of the battery cell, so that the battery cell is not shaken in a fixed position even under vibration or shock. . In addition, pads capable of cushioning the expansion of the electrode and the expansion of the volume of the battery cell due to gas generation have been inserted.

1 is a schematic top view of a cell cartridge combined with a conventional battery cell, and FIG. 2 is a II-II 'sectional view of FIG. 1.

1 and 2, the cell cartridge 2 is injection-molded to have a shape capable of fixing a corner portion of the battery cell body, and the two battery cells 1 are attached to the cell cartridge 2 When mounted, the edges forming the rim are accommodated inside the cell cartridge 2 while being fitted inside the cell cartridge 2. Accordingly, in the conventional battery module, when the edge of the battery cell 1 is fitted inside the cell cartridge 2, shock or vibration that may occur during installation can be transmitted to the edge of the battery cell 1, There is a problem that damage to the battery cell 1 may occur, such as the electrode assembly or the electrode lead 3 inside the battery cell 1 being damaged.

Looking more specifically with reference to FIG. 3, which is an enlarged view of part III of FIG. 2, in the direction indicated by “a”, the battery cell 1 shoulder portion and the cell cartridge 2 contact with each other in the x direction. Although movement can be restrained, there is a fear that the thickness of the separator inside the battery cell 1 may be thinned due to continuous pressing or the end of the electrode may be destroyed, resulting in a short circuit.

In addition, as shown by the "b", the electrode leads 3 of the two battery cells 1 are fixed by welding, while the body of the battery cells 1 can flow in the x direction due to vibration and shock. Therefore, the lead 3 of the battery cell 1 may be damaged.

In addition, if you look at the part marked with "c", the edge of the battery cell 1 is in contact with the counterpart such as the cell cartridge 2. Accordingly, when a cell swelling occurs in the process of charging and discharging the battery cell 1 and BOL-> EOL, it is difficult to secure an internal gas pocket area, and the battery cell ( 1) The internal ultrasonic welding part is damaged, which increases the possibility of short circuit. When the structure of the cell cartridge 2 is changed so that the edge of the battery cell 1 does not contact the counterpart such as the cell cartridge 2, it is difficult to secure the fixed structure of the battery cell 1 in the longitudinal direction.

As described above, the conventional battery module structure has several problems, and a new module structure is required.

Since the size and weight of the battery module are directly related to the storage space and output of the medium and large-sized device, manufacturers are trying to manufacture a battery module capable of miniaturization and light weight while ensuring high output. For this, it is necessary to develop a simple and compact module structure that secures the fixing of the battery cells so that the structure of the entire battery pack is not complicated and does not take up a lot of space.

The problem to be solved by the present invention is to provide a battery module and a method for manufacturing the battery module, which are simple and compact, but have a fixed battery cell.

In order to solve the above problems, the battery module according to the present invention, two or more pouch-type battery cells; And a square tube mono frame accommodating the battery cells and forming a first opening and a second opening that are opened on both sides in the longitudinal direction of the battery cells, and a large area surface of the battery cell and a surface where the mono frame abuts. It is characterized by having a male / female velcro tape so that the battery cell is fixed to the mono frame by the male / female velcro tape combination.

The male / female velcro tape is preferably a flame retardant material rated at UL94 V-1 or higher.

The male / male velcro tape is preferably an insulating material having an insulation breaking strength of 10 kV / mm or more.

The male / female velcro tape preferably has an adhesive strength of 1,000 gf / inch or more.

The male / female velcro tape preferably has a thickness of less than 2 mm after bonding.

The connection between the battery cells and the connection between the battery cell and the external terminal may be inserted into the mono frame after being connected in advance from the outside.

The exterior material of the battery cell may be composed of only an inner resin layer and an outer resin layer that are heat-sealed.

The electrode terminals of the battery cell may be formed in one direction or both directions.

The electrode terminals of the battery cell may be electrically connected in series or in parallel on one or both sides of the battery module.

The mono frame may be made of a metal material.

A battery module manufacturing method according to the present invention comprises the steps of laminating two or more pouch-type battery cells and attaching a male / female velcro tape to the outer large area of the outermost battery cell; A rectangular tubular mono frame is formed to receive the battery cells and form first openings and second openings which are opened on both sides in the longitudinal direction of the battery cells, and are paired at positions to be combined with the female / male velcro tapes on the inner surface. Attaching the male / female velcro tapes to form; Inserting the battery cells through a first opening or a second opening of the mono frame through a film sheet so that the Velcro tapes are not bonded; And removing the film paper so that the Velcro tapes are combined.

It is preferable to first place the film paper in the mono frame and then insert the battery cells into the mono frame.

The film paper has a sheet shape having ends exposed outside the first opening and the second opening of the mono frame, and may be removed from the mono frame along the direction in which the battery cells are inserted after inserting the battery cells. have.

The present invention also provides a battery pack including such a battery module.

The battery pack may be used as a power source for medium and large devices, and the medium and large devices may include 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 two-wheeled vehicles including E-bikes and E-scooters; Electric Golf Cart (Electric Golf Cart); Electric truck; It may be an electric commercial vehicle or a system for power storage.

According to the present invention, instead of a conventional cell cartridge, a square tube mono-frame type module case is used, and a velcro tape is interposed between the battery cell and the mono frame to fix the mono frame and the battery cell through the velcro tape. Accordingly, since the cell cartridge does not need to be structured to press and hold the edge of the battery cell as in the prior art, the margin of design of the entire battery module increases, and when the edge of the battery cell is fitted into the cell cartridge, it may occur when mounting. It is possible to solve the problem that the shock or vibration that can be transmitted to the edge of the battery cell.

In particular, according to the present invention, no mechanical pressure is applied to the battery cell shoulder. Accordingly, the thickness of the separator inside the battery cell may be thinned or the electrode end may be destroyed due to continuous pressing, thereby preventing the possibility of short circuit.

As described above, according to the present invention, it can be changed into a mono frame rather than a cell cartridge by fixing through a velcro tape, so that when the battery cell is mounted and held inside the cell cartridge, shock or vibration, etc., can be changed to the edge of the battery cell. It can be prevented from being transferred to, there is no problem due to continuous pressing and has the advantage of securing the gas pocket area. Accordingly, damage to the battery cells can be prevented when the battery cartridge is mounted and maintained in the battery cell, and a battery pack including such a battery module can be provided.

The battery module and the battery pack have an excellent effect of protecting the battery cell against external vibration, and thus are advantageous for application to automobiles that are frequently exposed to external vibration.

According to the present invention, it is possible to securely fix the battery cell and the mono frame, and provides a stable space to accommodate such expansion even when the volume is expanded according to the use of the battery cell. If using the existing cell cartridge method, it is impossible to insert the battery cells in the mono frame due to the double-sided tape of the pad. In the present invention, by using the Velcro tape, the assembly between the battery cell and the mono frame is facilitated, and the position of the battery cell can be secured by vibration and shock, and even if the battery cell is swelled, it can be accommodated.

According to the present invention, by using a flame retardant and / or insulating material as the Velcro tape, the insulation process inside the mono frame is possible, so that the assembly processability / fixation / space efficiency can be maximized.

As described above, the present invention breaks the existing cell cartridge method, and the structure of the entire battery pack is not complicated, and a simple and compact battery module can be provided without taking up a lot of space, and fixing between the battery cell and the module case is easy. It becomes clear.

The following drawings attached to this specification are intended to illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the invention described below, and thus the present invention is described in such drawings. It is not limited to interpretation.
1 is a schematic top view of a cell cartridge combined with a conventional battery cell.
FIG. 2 is a sectional view taken along line II-II 'in FIG. 1.
3 is an enlarged view of part III of FIG. 2.
4 is a schematic perspective view of a battery module according to an embodiment of the present invention.
5 is a schematic front view of the battery module of FIG. 4.
6 is a side projection view of the battery module of FIG. 4.
7 is a flowchart of a method for manufacturing a battery module according to an embodiment of the present invention.
8 to 10 are schematic diagrams for each process according to the flowchart of FIG. 7.
11 is a cross-sectional view taken along line II-II 'of FIG. 10.

The present invention will become more apparent by describing the preferred embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the embodiments described herein are illustratively shown to help understanding of the present invention, and that the present invention can be implemented in various ways differently from the embodiments described herein. In addition, in order to help the understanding of the invention, the accompanying drawings are not drawn to scale, but the dimensions of some components may be exaggerated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In the drawings, parts not related to the description are omitted in order to clearly describe the present invention, and the same reference numerals are attached to the same or similar elements throughout the specification.

4 is a schematic perspective view of a battery module according to an embodiment of the present invention. FIG. 5 is a schematic front view of the battery module of FIG. 4, and FIG. 6 is a side projection view of the battery module of FIG. 4. In FIG. 5, for convenience of illustration, although it is expressed that there is a predetermined space between each member, the space may be substantially absent and even negligible.

4 to 6, the battery module 100 includes two or more pouch-shaped battery cells 110 and a mono frame 120 that houses the battery cells 110.

The mono frame 120 is a square tube forming a first opening 130 and a second opening 140 that are open on both sides in the longitudinal direction of the battery cells 110.

The first opening 130 and the second opening 140 are opened on both sides in the longitudinal direction of the battery cells 110 in the mono frame 120. That is, the mono frame 120 is formed of a square tube that opens both sides facing each other and connects the remaining four surfaces.

For example, 4 to 10 battery cells 110 may be stacked in the mono frame 120 to be built in a vertically parallel arrangement.

Velcro tapes 112 and 122 are provided on the surfaces of the battery cells 110 and the mono frame 120, respectively, so that the battery cells 110 are mono-framed by combining the Velcro tapes 112 and 122. It is fixed to (120).

Since the electrode terminals 116 are connected to each other between the battery cells 110, even if the Velcro tape 112 is provided only on the outermost battery cells of the battery cell stack, the entire battery cell stack is fixed to the mono frame 120. do. More preferably, the adhesive members such as adhesive adhesives such as double-sided tapes or chemical adhesives bonded by a chemical reaction during adhesion may be interposed to maintain a stable stacked structure between the battery cells 110.

As is well known, Velcro tapes have hooks on one side and hooks on the other, so they can be attached and removed. It is also called a squeaker tape.

In the present invention, the velcro tapes 112 and 122 may be male velcro tapes with hooks or female velcro tapes with loops. For example, if the Velcro tape 112 provided on the battery cell 110 is a female Velcro tape, the Velcro tape 122 provided on the mono frame 120 is a pair of Velcro tapes, and vice versa. Do. Thus, the velcro tapes 112 and 122 are male / female velcro tapes.

In the battery module 100, since the battery cells 110 are fixed to the mono frame 120 by entangled coupling such as fine loop irregularities of the velcro tapes 112 and 122, sliding due to external shock, displacement of the seat, etc. Can be prevented. In addition, since the Velcro tapes 112 and 122 exhibit a predetermined elastic deformation by external force, they can absorb the external force applied by the impact and can also accommodate cell swelling, and the refrigerant such as air can pass through the entangled structure. There is also an effect that can not only increase the cooling efficiency, but also ensure the long-term service life without deteriorating the adhesion, thereby maintaining the module structure stably.

The velcro tapes 112 and 122 are preferably flame retardant materials rated UL94 V-1 or higher.

As is well known, the Underwriter's Laboratory (UL) has been expanding its business field ever since the first US insurers began establishing their own standards and evaluating stability as a means of evaluating the safety of electrical appliances / electronics. In the United States and other regions, if there is no UL mark, the market entry itself is exerting a great influence. Among them, UL94 is an evaluation of flame retardancy (the degree of incombustibility to fire), which is especially an evaluation of flame retardancy for plastics.The specimen is installed vertically or horizontally and then fired to test. By evaluating the flame retardancy, it exhibits properties with a degree of self extinguish.

The evaluation method is as follows.

Prepare a specimen with a length of 5 inches × width 1/2 inches × minimum thickness, 5 inches × 1/2 inches × maximum width (not exceeding 1/2 inch), and prepare a specimen at 23 ± 2 ℃, 50 ± 5% RH for 48 hours, After pre-treatment at 70 ± 1 ° C. and 50 ± 5% RH for 168 hours, the flame was contacted 10 times in the center of the bottom of the specimen, and the 6-inch flame was dropped from the specimen to measure the burning time of the specimen. Immediately after extinguishing, touch the flame again for 20 seconds and remove it. The burning time, the burning time and the presence or absence of ignition of the surgical cotton wool placed under 12 inches are recorded.

UL94 has 5V, V-2, V-1, and V-0 grades, among which UL94 V-1 grades do not burn for more than 30 seconds after one flame contact, 5 specimens each 2 times, a total of 10 flames It is the case that the burning time after contact is within 250 seconds, the cotton wool under 12 inches is not burned by the falling of a fireball, and the drawing after the second flame contact is within 60 seconds, and does not burn to the clamp part.

UL94 V-1 and above are UL94 V-1 and UL94 V-0, and UL94 V-0 is the UL94 V highest flame retardant rating.

When the Velcro tapes 112 and 122 are made of a flame-retardant material having a UL94 V-1 or higher rating as described above, even if a spark occurs in the battery module 100, it can be prevented from spreading by a larger fire.

In addition, the velcro tapes 112 and 122 are preferably insulating materials having an insulation breaking strength of 10 kV / mm or more.

When a voltage is gradually increased after applying a voltage to the insulating material, the material loses insulation at a certain point and current flows, which is called an insulation breakdown phenomenon. The breakdown strength is obtained by dividing the voltage V causing the breakdown by the thickness d of the material. The Velcro tapes 112 and 122 are preferable because an insulating breakdown strength of at least 10 kV / mm among insulating materials can be used to block the risk of electrical conduction with the outside. Insulation materials include, for example, polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET, PET), polyamides (PA, nylon), polyester (polyester, PES), polyvinyl chloride (PVC), polyurethane (polyurethanes, PU), polycarbonate (PC), polyvinylidene chloride (PVDC, Saran), polytetrafluoroethylene ( It may include at least one selected from the group consisting of polytetrafluoroethylene, PTFE, Teflon), polyetheretherketone (PEEK, polyketone) and polyetherimide (PEI, Ultem). In this way, by adopting an insulating material having a dielectric breakdown strength of 10 kV / mm or more, the insulation can be improved to further improve the electrical safety of the battery module 100.

The Velcro tapes 112 and 122 preferably have an adhesive strength of 1,000 gf / inch or more. The adhesive force here refers to the force attached to the surface to be adhered to a certain area. Since the adhesive strength of a general double-sided tape is about 400 to 800 gf / inch, and the OPP tape is about 600 gf / inch, when using Velcro tapes 112 and 122 with adhesive strength of 1,000 gf / inch or more, the battery cell 110 and the mono frame 120 ) Can be fixed very firmly.

The velcro tapes 112 and 122 are preferably less than 2 mm thick after bonding. The mono frame 120 may be designed in consideration of the thickness of the Velcro tapes 112 and 122. .

On the other hand, the velcro tapes 112 and 122 are shown in an approximate band shape, but depending on the structure, the center portion may be an empty frame shape, or a shape divided into several independently separated portions to be applied to individual locations. have. The velcro tape 112 may be provided on the entire large area of the battery cell 110 or may be provided on a part, as in the present embodiment. The velcro tape 122 can naturally be provided with a size and position suitable therefor.

According to the present invention, the battery cell 110 and the mono frame 120 are fixed by coupling the Velcro tapes 112 and 122 to limit relative motion. If such a mono frame 120 is used, there is no need for a cell cartridge to press and fix the edge of the battery cell 110 as in the prior art. Accordingly, the degree of freedom in designing the battery module 100 increases, so that a battery module having various structures and capacities can be manufactured.

Since the velcro tapes 112 and 122 have a predetermined thickness and can be compressed to some extent, the battery cells 110 and the mono frame 120 are fixed by means of the velcro tapes 112 and 122, while the cells During swelling, it can function as a pressure absorber or an electric insulation.

In the present invention, the battery cell 110 is not particularly limited as long as it is a secondary battery capable of charging and discharging. For example, a lithium secondary battery, a nickel-hydrogen (Ni-MH) secondary battery, a nickel-cadmium (Ni-Cd) secondary battery, and the like, but among them, a lithium secondary battery providing high output power to weight is preferred. You can.

In addition, the battery cell 110 in the present invention is a pouch-type battery cell, in which the electrode assembly of the anode / separator / cathode structure on the laminate sheet exterior material 114 is connected to the electrode terminals 116 formed outside the exterior material. It is built with.

That is, an electrode terminal 116 (positive terminal and negative terminal) electrically connected to the electrode assembly protrudes outside the battery cell exterior material 114. The electrode terminals 116 may be formed to protrude in only one direction from the left or right side of the battery cell exterior material 114 in the drawing, or may be formed to protrude in both directions on both the left and right sides. After all, the electrode terminals 116 are electrically connected in series or in parallel on one or both sides of the battery module 100 having a substantially hexahedral shape, and the final positive / negative terminal is connected to the outside of the battery module 100 Structure.

At this time, when the electrode terminals 116 protrude in only one direction from the exterior material 114, the mono frame 120 of the present invention is open only on one side, and when protruding in both directions, the mono frame 120 is on both sides. This should be open. 4 to 6 show an example in which both side surfaces of the mono frame 120 are opened.

The battery cell exterior material 114 may include both an inner resin layer for heat fusion, a barrier metal layer, and an outer resin layer for improving durability, as in the conventional case, but is completely sealed in the present invention as described below. Since the mono frame 120 itself can perform the role of a conventional barrier metal layer instead, the cell exterior material 114 may also have the advantage of being configured with only the inner resin layer and the outer resin layer while omitting the metal layer. have.

The mono frame 120 may be made of a metal material. Since the metallic material has excellent thermal conductivity, it is possible to perform heat dissipation as a whole. The material of the mono frame 120 can be any metal material, but considering the thermal conductivity, processability, cost, etc., it is preferable to use SUS-based or Al-based.

In the present invention, the connection between the battery cells 110 and between the battery cells 110 and the external terminal may be inserted into the mono frame 120 after being connected in advance from the outside.

Specifically, before inserting the battery cell 110 into the mono frame 120, electrical connections between the electrode terminals 116 of the battery cell and the battery cell 110 and the external terminal are made in advance, and then the connection is completed. When inserted into the mono frame 120, additional parts for electrical fastening of the terminals do not need to be welded. Accordingly, the ease of operation is superior.

On the other hand, the present invention relates to a battery pack comprising the battery module 100 as described above.

In particular, the battery pack according to the present invention is suitable to be used as a power source for medium and large devices. In the case of a medium- or large-sized battery pack, a large number of battery cells are stacked and used to secure high-output and high-capacity performance, because the battery module constituting such a battery pack requires a more compact and concise structure.

Specific examples of the medium-to-large-sized device include: 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 two-wheeled vehicles including E-bikes and E-scooters; Electric Golf Cart (Electric Golf Cart); Electric truck; And electric commercial vehicles or power storage systems.

Since the specific structure and manufacturing method of the medium-to-large-sized battery pack are known in the art, the description thereof will be omitted.

Hereinafter, a method of manufacturing a battery module according to an embodiment of the present invention will be described in detail with reference to FIGS. 7 to 10.

7 is a flowchart of a method for manufacturing a battery module according to an embodiment of the present invention, and FIGS. 8 to 10 are schematic diagrams for each process according to the flowchart of FIG. 7.

Referring to steps S1 and 8 of FIG. 7, two or more pouch-shaped battery cells 110 are stacked and a Velcro tape 112 is attached to the outer large area of the outermost battery cell 110.

Next, referring to steps S2 and 9 of FIG. 7, the first openings 130 and the second openings 140 that receive the battery cells 110 and open to both sides in the longitudinal direction of the battery cells 110 are formed. Prepare a square tube mono frame 120. On the inner surface of the mono frame 120, a Velcro tape 122 paired at a position to be combined with the Velcro tape 112 provided in the battery cell 110 is attached. Then, the film paper 150 is placed on the side of the Velcro tape 122. The film paper 150 may be, for example, a PET film, and has a sheet shape having ends exposed outside the first opening 130 and the second opening 140 of the mono frame 120.

Next, referring to step S3 and FIG. 10 of FIG. 7, the battery cell 110 through the first opening of the mono frame 120 through the film 150 so that the Velcro tapes 112 and 122 are not coupled ( 130). It may be inserted through the second opening 140.

After inserting the battery cells 110 as shown in step S3, the inside view of the battery module is shown in the cross-sectional view of FIG. 11, the Velcro tape 112 of the battery cell 110 and the Velcro tape 122 of the mono frame 120 ) Since the film 150 is interposed, the Velcro tapes 112 and 122 are not coupled to each other, and the positions of the battery cells 110 can be freely adjusted.

Next, referring to step S4 of FIG. 7, the film paper 150 is removed so that the velcro tapes 112 and 122 are coupled to each other, thereby manufacturing a battery module 100 as shown in FIG. 4. At this time, if the film paper 150 is removed from the mono frame 120 along the direction in which the battery cells 110 are inserted, continuity of the process is secured.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is usually in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications can be made by those having knowledge of, and these modifications should not be individually understood from the technical idea or prospect of the present invention.

100: battery module 110: battery cell
112, 122: Velcro tape 114: Exterior material
116: electrode terminal 120: mono frame
130, 140: opening 150: film paper

Claims (16)

Stacking two or more pouch-shaped battery cells and attaching a male / female velcro tape to the outer large area of the outermost battery cell;
A rectangular tubular mono frame is formed to receive the battery cells and form first and second openings on both sides in the longitudinal direction of the battery cells. Attaching the male / female velcro tapes to form;
The battery cells are inserted through the first opening or the second opening of the mono frame so that the Velcro tapes are not bonded, and the film paper is exposed outside the first opening and the second opening of the mono frame. Having a sheet shape, first placing the film paper in the mono frame and then inserting the battery cells into the mono frame; And
After inserting the battery cells, removing the film from the mono frame along the direction in which the battery cells are inserted, so that the Velcro tapes are combined,
The step of attaching the male / female velcro tape is
A male / female velcro tape is attached to a surface of the battery cell that is in contact with the mono frame,
The male / female velcro tape has an adhesive strength of 1,000 gf / inch or more,
A battery module manufacturing method characterized in that the battery cells are fixed to the mono frame by the male / female velcro tape combination. The method of claim 1, wherein the male / female velcro tape is a flame retardant material having a UL94 V-1 rating or higher. The method of claim 1, wherein the male / female velcro tape is an insulating material having a dielectric breakdown strength of 10 kV / mm or more. delete The method of claim 1, wherein the male / female velcro tape has a thickness of less than 2 mm after bonding. The method of claim 1, wherein the connection between the battery cells and the connection between the battery cell and the external terminal is connected in advance from the outside and then inserted into the mono frame. The method of claim 1, wherein the battery cell exterior material comprises only an inner resin layer and an outer resin layer that are heat-sealed. The method of claim 1, wherein the electrode terminals of the battery cell are formed in one direction or both directions. The method of claim 1, wherein the electrode terminals of the battery cell are electrically connected in series or in parallel on one or both sides of the battery module. The method of claim 1, wherein the mono frame is made of a metal material. delete delete delete delete delete delete

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