KR20240075493A - Pouch-type secondary battery, secondary battery module and secondary battery pack - Google Patents

Abstract

According to one embodiment of the present disclosure, a pouch-type housing including an electrode assembly, a receiving portion in which the electrode assembly is accommodated, a sealing portion formed on at least a portion of a circumference along a circumference of the receiving portion, and a first sealing portion of the sealing portion. In, at least one fixing member coupled to the first sealing part to surround at least a portion of the outer surface of the first sealing part and including at least one opening, and covering the opening, the heat of gas generated in the surrounding and By providing a pouch-type secondary battery that includes a heat-blocking member that blocks flame, it is possible to block the spread of heat or flame generated from the inside of the secondary battery.

Description

Pouch-type secondary battery, secondary battery module and secondary battery pack}

The present disclosure relates to pouch-type secondary batteries, secondary battery modules, and secondary battery packs.

Unlike primary batteries, secondary batteries can be charged and discharged, so they can be applied to various fields such as digital cameras, mobile phones, laptops, hybrid cars, and electric vehicles.

Generally, these secondary batteries are constructed by stacking or winding an electrode assembly formed of a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode, embedding it in a battery case of a metal can or laminate sheet, and then injecting or impregnating an electrolyte solution. It can be.

However, when secondary batteries reach abnormal operating conditions such as internal short circuit, overcharging, or exposure to high temperatures, the internal electrolyte solution decomposes and high-pressure gas is generated. The generated high-pressure gas can cause deformation of the battery case, shorten the life of the battery, and seriously cause ignition or explosion of the battery.

The explosion of a secondary battery can damage adjacent secondary batteries. In particular, gas, heat, flame, etc. resulting from the explosion of the secondary battery can cause significant damage to the upper surface of the surrounding secondary battery, making it impossible to use not only the secondary battery but also the secondary batteries around it.

Therefore, an alternative solution is needed to protect the secondary battery while preventing ignition or explosion of the battery when high-pressure gas is generated.

KR 2022-0014117 A

The present disclosure provides a pouch-type secondary battery.

Additionally, the present disclosure provides a secondary battery module including a pouch-type secondary battery.

Additionally, the present disclosure provides a secondary battery pack including a secondary battery module.

A pouch-type secondary battery according to the first aspect of the present disclosure includes an electrode assembly, a pouch-type housing including an accommodating portion in which the electrode assembly is accommodated, a sealing portion formed on at least a portion of the circumference along the circumference of the accommodating portion, and one of the sealing portions. In the first sealing part, at least one fixing member coupled to the first sealing part and including at least one opening so as to surround at least a portion of the outer surface of the first sealing part, and covering the opening, thereby causing heat generated around the first sealing part. It may include a heat-blocking member that blocks the heat and flame of the gas.

According to one embodiment, the fixing member may be a clip made of a steel or aluminum-based metal member.

According to another embodiment, the upper surface of the fixing member may be located on the first sealing part facing the upper end of the first sealing part, and the at least one opening may be formed in the upper surface.

According to another embodiment, the heat barrier member may include a film, sheet, tape, or a combination thereof having at least one property of flame retardancy, non-combustibility, and fire resistance and insulation.

According to another embodiment, the heat blocking member includes at least one opening that can be opened by the gas, and the opening may include a cut portion that adjusts the amount of gas discharged and creates a gas discharge guide passage.

According to another embodiment, the opening may be located on the opening of the fixing member.

According to another embodiment, the incision may be cut along a plurality of incision lines that may intersect each other at the center of the opening to form an incision site.

The secondary battery module according to the second aspect of the present disclosure includes a plurality of pouch-type secondary batteries, a module storage portion accommodating the pouch-type secondary batteries, and a module cover covering the module storage portion, and the pouch-type secondary battery includes an electrode. A pouch-type housing including an assembly, a receiving portion in which the electrode assembly is accommodated, and a sealing portion formed on at least a portion of a circumference along a circumference of the receiving portion, in a first sealing portion of the sealing portions, in an outer surface of the first sealing portion. It may include at least one fixing member coupled to the first sealing portion to surround at least a portion of the first sealing member and including at least one opening, and a heat blocking member that covers the opening to block heat and flame of gas generated in the surrounding area. You can.

According to one embodiment, a venting hole that matches the gas discharge path of the opening of the fixing member may be formed in the module cover.

According to another embodiment, the heat blocking member includes at least one opening that can be opened by the gas, and a venting hole that matches the gas discharge path of the opening may be formed in the module cover.

The secondary battery pack according to the third aspect of the present disclosure includes a secondary battery module including a plurality of pouch-type secondary batteries, a plurality of pack storage units accommodating the secondary battery modules, and a pack cover covering the pack storage unit, The pouch-type secondary battery includes an electrode assembly, a pouch-type housing including a receiving portion in which the electrode assembly is accommodated, and a sealing portion formed on at least a portion of the circumference along the circumference of the receiving portion, and in a first sealing portion of the sealing portions, the first sealing portion, 1 At least one fixing member coupled to the first sealing part to cover at least a portion of the outer surface of the sealing part and including at least one opening, and a train that blocks heat and flame of gas generated in the surrounding area by covering the opening. It may include end members.

According to one embodiment, the pack cover may selectively cover at least a portion of the plurality of pack storage units.

According to another embodiment, a venting hole matching the gas discharge path of the opening of the fixing member may be formed in the pack cover.

According to another embodiment, the heat blocking member includes at least one opening, and a venting hole matching the gas discharge path of the opening may be formed in the module cover.

The features and advantages of the present disclosure will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms or words used in this specification and claims should not be interpreted in their usual, dictionary meaning, and the inventor may appropriately define the concept of the term in order to explain his or her invention in the best way. It must be interpreted with meaning and concept consistent with the technical idea of the present disclosure based on the principle that it is.

According to the first aspect of the present disclosure, adjacent secondary batteries can be protected by blocking the propagation of heat or flame from gas generated from inside the secondary battery.

According to the second aspect of the present disclosure, gas, heat of gas, or flame generated from inside the secondary battery may be discharged through the cover of the secondary battery module or secondary battery pack.

1 is a perspective cross-sectional view of a secondary battery according to an embodiment of the present disclosure.
Figure 2 is an exploded perspective view of the fixing member and the heat blocking member from the top of the first sealing part of the secondary battery according to an embodiment of the present disclosure.
Figure 3 is a perspective view of a fixing member and a heat blocking member combined with a first sealing portion according to an embodiment of the present disclosure.
4A and 4B are plan views illustrating examples of the number and location of openings formed on the upper surface of a fixing member according to an embodiment of the present disclosure.
FIG. 5 is a view showing a heat-blocking member covered on each opening formed on the upper surface of the fixing member of FIG. 4A.
FIG. 6 is a perspective view showing the cut portion of FIG. 5 opened by gas along the cut line.
Figure 7 is a schematic perspective view of a secondary battery module including a secondary battery according to an embodiment of the present disclosure.
Figure 8 is a schematic perspective view of a secondary battery pack including a secondary battery module according to an embodiment of the present disclosure.
FIG. 9 is a diagram illustrating the movement of gas, heat, or flame in a secondary battery module according to an embodiment of the present disclosure.

The objects, advantages, and features of the present disclosure will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings, but the present disclosure is not necessarily limited thereto. Additionally, in describing the present disclosure, if it is determined that a detailed description of related known technology may unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted.

In assigning reference numerals to components in the drawings, it should be noted that identical components are assigned the same reference numerals as much as possible even if they are shown in different drawings, and similar components are assigned similar reference numerals.

Terms used to describe an embodiment of the present disclosure are not intended to limit the disclosure. It should be noted that singular expressions include plural expressions unless the context clearly dictates otherwise.

The drawings may be schematic or exaggerated to illustrate implementations.

In this document, expressions such as “have,” “may have,” “includes,” or “may include” refer to the existence of the corresponding feature (e.g., a numerical value, function, operation, or component such as a part). , and does not rule out the existence of additional features.

Terms such as “one”, “other”, “another”, “first”, “second”, etc. refer to the separation of one element from another. They are used for distinction, and the components are not limited by the above terms.

It should be understood that terms indicating direction, such as up, down, left, right,

The implementation examples described in this document and the accompanying drawings are not intended to limit the disclosure to specific embodiments. This disclosure should be understood to include various modifications, equivalents, and/or alternatives of the embodiments.

Hereinafter, an implementation example of the present disclosure will be described in detail with reference to the attached drawings.

1 is a perspective cross-sectional view of a secondary battery according to an embodiment of the present disclosure, viewed from the side of the secondary battery. That is, Figure 1 is a perspective cross-sectional view of a secondary battery according to an embodiment, viewed in the X direction.

Figure 2 is an exploded perspective view of the fixing member and the heat blocking member from the top of the first sealing part of the secondary battery according to an embodiment of the present disclosure, and Figure 3 is a perspective view of the fixing member and the heat blocking member being combined with the first sealing part. am.

In addition, FIGS. 4A and 4B are plan views showing examples of the number and location of openings formed on the upper surface of the fixing member according to an embodiment of the present disclosure, and FIG. 5 shows the angle formed on the upper surface of the fixing member of FIG. 4A. This is a drawing showing a heat-blocking member covered over an opening.

Hereinafter, Figures 1 to 5 will be referred to together.

Referring first to FIG. 1, the secondary battery 1000 is a pouch-type secondary battery, which includes an electrode assembly 110, a housing 120 that accommodates the same, and an electrode lead 130 electrically connected to the electrode tab of the electrode assembly 110. , 140). There may be at least two electrode leads (130, 140).

The electrode leads 130 and 140 are electrically connected to electrode tabs (not shown) extending from each electrode plate of the electrode assembly 110 by a method such as welding, and a portion is exposed to the outside of the housing 120. there is.

Here, the electrode plate includes a positive electrode plate and a negative electrode plate, and the electrode assembly may be formed by stacking the positive electrode plate and the negative electrode plate so that the wide surfaces face each other with a separator in between. The positive and negative electrode plates are formed by applying an active material slurry to a current collector. The slurry is typically formed by stirring granular active materials, auxiliary conductors, binders, and plasticizers with a solvent added.

An insulating film 150 is attached to some of the upper and lower surfaces of the electrode leads 130 and 140 in order to increase the sealing force with the housing 120 and at the same time ensure electrical insulation. The electrode leads 130 and 140 of the anode and cathode may be formed in positions opposite to each other, as in one embodiment, or may be located side by side in the same direction.

The housing 120 is formed of an aluminum laminate sheet, etc., and may provide a sealed space capable of accommodating the electrode assembly 110.

The housing 120 may be formed in a pouch shape and may include a receiving portion 160 and a sealing portion 170.

The receiving portion 160 may be formed in the shape of a container to provide a square-shaped internal space. The electrode assembly 110 is accommodated in the internal space of the receiving portion 160.

The sealing portion 170 may be formed in a flange shape extending outward from the receiving portion 160. Accordingly, the sealing portion 170 may be disposed along the circumference of the receiving portion 160 and at least a portion of the circumference.

The sealing portion 170 may be joined using a heat fusion method, but is not limited thereto.

The sealing portion 170 may include a first sealing portion 1710 in which the electrode leads 130 and 140 are not disposed, and a second sealing portion 1720 in which the electrode leads 130 and 140 are disposed.

Meanwhile, in one embodiment, the housing 120 may be formed by forming a single sheet of exterior material. More specifically, the housing 120 can be completed by forming one or two receiving parts in one exterior material and then folding the exterior material so that the receiving parts form one space (i.e., receiving part).

Additionally, the housing 120 may be made of a sheet material made by repeatedly stacking a metal layer and a resin layer, but is not limited thereto.

In one implementation, the receiving portion 160 may be formed in a square shape. And since one housing 120 is folded to form the receiving part 160 and the sealing part 170, the secondary battery 1000 of one embodiment does not need to form the sealing part 170 on the folded surface of the housing.

Accordingly, in one embodiment, the sealing part 170 is provided only on three of the four sides forming the outline of the receiving part 160, and the sealing part is not disposed on any one of the outer surfaces of the receiving part (the lower surface in FIG. 1). No.

Since the electrode leads 130 and 140 are arranged to face opposite directions, the electrode leads 130 and 140 can be placed on the sealing portion 170 formed on different sides. Accordingly, the sealing part 170 of one embodiment includes one first sealing part 1710 in which the electrode leads 130 and 140 are not disposed, and two second sealing parts in which the electrode leads 130 and 140 are disposed ( 1720).

Although one embodiment describes a housing having three sealing portions 170 by folding one piece of exterior material, the present invention is not limited thereto. For example, the housing may include four sealing portions 170 by combining two exterior materials together. In this case, the sealing portion 170 includes two first sealing portions 1710 in which the electrode leads 130 and 140 are not disposed, and two second sealing portions 1720 in which the electrode leads 130 and 140 are disposed. may include.

The secondary battery 1000 may include a fixing member 180 that can be coupled to the outer surface of the first sealing portion 1710 so as to surround at least a portion of the outer surface.

To this end, the fixing member 180 presses and secures both sides of the first sealing part 1710. ". However, the fixing member 180 is not limited to this shape and may have various shapes as long as it can be fixed by pressing both sides of the first sealing portion 1710.

The fixing member length (l) may be formed in a range of 50% to 100% of the outer surface length (L) of the first sealing portion (1710). However, the fixing member length l is formed within this range, but is not limited thereto, and may be changed to an appropriate length depending on the shape of the fixing member 180.

In addition, the fixing member 180 does not necessarily need to be formed as one, and the state of the sealing part, especially the first sealing part 1710, for example, the joined state of the first sealing part 1710, or the state of the first sealing part 1710. Depending on the length or height of (1710), two or more may be used.

The fixing member 180 can suppress the spread of gas heat or flame that may be generated inside the secondary battery.

For this purpose, the fixing member 180 may be, for example, a flame-retardant and/or non-combustible film or sheet, or may be a clip that is a steel or aluminum-based metal member. The film or sheet may be coupled to the first sealing portion 1710 by adhesive, and the clip may be coupled to the first sealing portion 1710 by fitting.

However, the fixing member 180 is not limited to the films, sheets, or clips discussed above, and various members may be used as long as they are heat-resistant and capable of fixing the sealing portion. And of course, as long as the coupling method allows the member to be easily coupled to the sealing part, various coupling methods can be used.

Referring to Figures 2 and 3, the fixing member 180 includes two fixing member sides 1810 and 1820 along the longitudinal direction of the outer surface of the first sealing portion 1710, and an upper fixing member connecting these sides. It may include cotton 1830.

The two fixing member side surfaces 1810 and 1820 are located on at least a portion of the outer surface of the first sealing part 1710, and the fixing member upper surface 1830 faces the top of the first sealing part 1710 and forms the first sealing part 1710. It may be located on the sealing portion 1710.

The fixing member 180 may include at least one opening 1840.

The opening 1840 may discharge gas when the first sealing portion 1710 is ruptured due to gas pressure generated inside the secondary battery, that is, from the receiving portion 160 of the housing 120.

As shown in FIG. 2, the opening 1840 may be formed on the upper surface 1830 of the fixing member and may be formed in an oval shape along the longitudinal direction of the outer surface of the first sealing part 1710.

Additionally, when referring to FIGS. 4A and 4B, the openings 1840 may be formed continuously on the upper surface 1830 of the fixing member, and may be formed in a circular shape.

However, as described above, the shape of the opening is not limited to oval or circular, but may include a circular, square, oval, polygonal, or combination thereof, considering the amount of gas discharged and the location of gas discharged.

FIG. 4A shows three openings 1840 formed in a rectangular shape on the upper surface 1830 of the fixing member, and FIG. 4B shows 10 openings 1840 formed in a circular shape on the upper surface 1830 of the fixing member. Although the shape of the opening 1840 is shown to be the same in FIGS. 4A and 4B, this is only an example, and of course, the opening 1840 of various shapes may be formed on one or more upper surfaces 1830 of the fixing member.

The cross-sectional area of the opening 1840 may generally range from 5% to 90% of the cross-sectional area of the fixing member 180, but is not limited thereto, and may be of an appropriate size in consideration of the amount of gas discharged and the location of the gas discharged. You can have it.

Referring again to FIGS. 2 and 3, the secondary battery 1000 may include at least one heat blocking member 190 that can cover the opening 1840 on the fixing member 180.

Since the heat blocking member 190 must block the propagation of high-temperature gas and flame, it may include a material having at least one property of flame retardancy, non-combustibility, and fire resistance insulation, that is, a film, sheet, tape, or a combination thereof. .

For example, the heat barrier member 190 may be made of a film material that ignites at a temperature of 800° C. or higher, has a thermal conductivity of 0.3 W/mK or less, and has a heat resistance rating of VO or higher. Such materials generally may include ingredients such as mica, chlorine-containing vinyl chloride resin, chlorinated paraffin, decabromodiphenyl oxide, and antimony trioxide. However, the material of the heat blocking member 190 is not limited to these components, and various components may be used as long as they are highly resistant to flame and heat.

Additionally, the heat blocking member 190 may include at least one opening 1940 that can be opened by gas generated from the inside of the secondary battery 1000.

Specifically, the heat blocking member 190 is similar to the shape of the fixing member 180 and surrounds at least a portion of the outer surface of the fixing member 180. " It may be formed in a shape. That is, the heat-blocking member 190 includes two heat-blocking member sides (1910, 1920) along the longitudinal direction of each fixing member side (1810, 1820), and a wall connecting these sides. It may include a top surface of the thermal barrier member (1930).

When the heat blocking member 190 is coupled to the fixing member 180, adhesive is generally used, but this is only an example. If there is a means that can easily combine the heat blocking member 190 and the fixing member 180, A variety of means can be used.

Meanwhile, the heat blocking member upper surface 1930 may be positioned on the fixing member 180 facing the fixing member upper surface 1830.

In particular, the heat blocking member upper surface 1930 may be positioned correspondingly to the opening 1840 of the fixing member 180. For example, one thermal barrier top surface 1930 may be positioned correspondingly over all openings 1840. Additionally, when using a plurality of heat-blocking member top surfaces 1930, the heat-blocking member top surfaces 1930 may be positioned to selectively correspond to at least some of the openings 1840.

Depending on the amount of coverage of the heat blocking member 190 to the fixing member 180, the degree of blocking high temperature gas and flame generated from adjacent secondary batteries can be adjusted.

For example, in order to block flames generated from adjacent secondary batteries 1000 as much as possible, the heat blocking member 190 may surround the entire fixing member, including the opening 1840 of the fixing member, and the flame generated In order to minimize the heat blocking member 190, the heat blocking member 190 may be formed to cover only the opening 1840 of the fixing member.

Additionally, the heat-blocking member 190 may include at least one opening 1940 formed on the top surface of the heat-blocking member 1930. The opening 1940 may be located on the opening 1840 of the fixing member 180 to discharge internal gas of the secondary battery through the opening 1840.

For example, Figure 5 shows three heat-blocking members 190 covered over each opening 1840 formed in the upper surface 1830 of the fixing member of Figure 4a, and each heat-blocking member 190 is continuously provided. It shows that the three openings 1940 formed are positioned correspondingly on each opening 1840. Here, it is shown that three openings 1940 are formed on each opening 1840, but this is only an example, and the openings 1940 are formed with less than three or more than three openings corresponding to each opening of the fixing member. It can be.

The cross-sectional area of the opening 1940 may generally range from 10% to 100% of the cross-sectional area of the opening 1840, but is not limited thereto and may have an appropriate size depending on the amount of gas discharged and the gas discharged location.

Additionally, the opening 1940 may be generally circular as shown, but is not limited thereto and may include an oval shape, a square shape, a triangle shape, or a combination thereof.

Additionally, the opening portion 1940 may include a cut portion 1942 that adjusts the amount of gas discharged from inside the secondary battery and creates a gas discharge guide passage.

The incision 1942 may be cut along a plurality of incision lines CL that may intersect each other at the center of the opening 1940. The cut line may include the shape of “+” or “×”, but is not limited thereto, and may also include any shape formed by cut lines that can intersect each other (for example, “*”).

The length of the incision line can determine the amount of gas emissions generated from inside the secondary battery. For example, when the length of the incision line is short, the amount of gas discharge may be reduced, and when the length of the incision line is long, the amount of gas discharge may be increased.

FIG. 6 is a perspective view showing the cut portion of FIG. 5 opened by gas along the cut line.

The incision portion 1942 may be cut along the incision line by gas generated upward from the inside of the secondary battery to form the incision portion 1950.

For example, the incision 1942 can form four triangular incisions 1950 with a maximum height (h) as the incisions along the two incision lines are folded upward due to the generated gas. there is.

This height (h) may be determined according to the length of the incision line, and may be less than or equal to the distance between the upper surface of the heat shield member 1930 and the cover covering the secondary battery. The cover will be described in more detail below.

As a result, since the incision 1942 can form the incision 1950, the generated gas can be discharged upward (in the direction of the arrow) along the incision 1950. That is, the incision 1942 is a gas discharge guide passage that allows gas, gas heat, or flame generated by forming the incision 1950 to be guided along the incision 1950 and discharged directly into the venting hole of the cover. can be created.

Figure 7 is a perspective view of a secondary battery module including a secondary battery according to an embodiment of the present disclosure, and Figure 8 is a perspective view of a secondary battery pack including a secondary battery module according to an embodiment of the present disclosure.

As shown in FIG. 7 , a secondary battery module 1100 may be created by stacking a plurality of secondary batteries 1000 in the left and right directions (or horizontal direction) according to one embodiment. In other words, the secondary battery module 1100 may include a plurality of secondary batteries 1000.

Specifically, the secondary battery module 1100 may include a module storage unit 1105 that accommodates a plurality of secondary batteries 1000, and a module cover 1130 that can cover the module storage unit 1105.

The module storage unit 1105 is generally connected to two left and right side plates 1110 and 1120 that are disposed to face the sides of the secondary battery and face each other, and the left and right side plates 1110 and 1120, and is located at the bottom of the secondary battery 1000. It includes a lower plate supporting the surface, and two front and back plates disposed opposite to each other, facing the front and back sides of the secondary battery, that is, the secondary battery lead. The bottom plate and front and rear plates are not shown here so that certain components are clearly visible.

Since the module cover 1130 covers the module storage portion 1105, the module cover 1130 can be positioned facing the heat blocking member 190 of the secondary battery.

The module cover 1130 has a venting hole 1132 located correspondingly on the opening 1840 of the fixing member (see, for example, FIGS. 3, 4A and 4B) or on the opening 1940 of the heat blocking member. ) can be formed.

The venting hole 1132 may be formed to match the gas discharge path of the opening 1840 of the fixing member or the gas discharge path of the opening 1940 of the heat blocking member. In other words, the venting hole 1132 may be formed so that gas can be immediately discharged when gas is generated from the secondary battery 1000.

The venting hole 1132 may be formed in an oval shape along the longitudinal direction (Y direction) of the opening 1840 of the fixing member. However, it is not limited to this, and the venting hole 1132 may be formed in a circular shape, a triangular shape, a polygonal shape, or a combination thereof according to the position of the opening portion 1940 of the heat blocking member.

The secondary battery module 1100 according to this embodiment may not include the module cover 1130 that covers the secondary battery 1000. This is because the secondary battery 1000 includes a fixing member 180, for example, a clip, that can protect the secondary battery from penetration of foreign substances from the external environment of the secondary battery, instead of a module cover.

Since the secondary battery module 1100 may not require the module cover 1130, as shown in FIG. 8, the density of the secondary battery pack 1200 accommodating a plurality of secondary battery modules 1100 is increased to increase the density of the secondary battery module 1100. The battery pack 1200 can be manufactured smaller than before.

Referring to FIG. 8, the pack cover 1230 of the secondary battery pack 1200 accommodating a plurality of secondary battery modules 1100 may be positioned on the secondary battery module 1100, particularly the secondary battery 1000. In other words, the pack cover 1230 may cover the secondary battery module 1100 or the secondary battery 1000.

Specifically, the secondary battery pack 1200 according to one embodiment may include a plurality of pack storage units 1250 in which partition walls 1240 are formed. The pack storage unit 1250 can accommodate the secondary battery module 1100.

Additionally, the secondary battery pack 1200 may include at least one pack cover 1230 that can cover the pack storage portion 1250.

The pack cover 1230 may selectively cover at least a portion of the plurality of pack storage units 1250.

For example, the pack cover 1230 can cover all of the pack storage portions where the secondary battery module 1100 is accommodated at once. In addition, for example, when two pack covers 1230 are used to cover four pack storage parts, the first pack cover can cover three pack storage parts, and the second pack cover can cover the remaining pack storage part. You can.

The pack cover 1230 has a venting hole correspondingly located on the opening 1840 of the fixing member (see, for example, FIGS. 3, 4A, and 4B) or on the opening 1940 of the heat blocking member. 1232) can be formed.

Since the location and shape of the venting hole 1232 are the same as described above, detailed description thereof will be omitted.

Figure 9 is a view of the secondary battery module viewed from the front or back, that is, along the Y axis, by combining the disassembled secondary battery module of Figure 7, showing the direction of movement of gas, heat, or flame generated from inside the secondary battery. It is a drawing.

When gas is generated from inside the secondary battery, most of the gas passes through the opening of the fixing member of the secondary battery (not shown here) to form a cut portion 1950 of the opening, thereby forming a cut portion 1950 of the module cover in the direction of the first arrow 1150. It can be discharged directly into the venting hole 1132, and a small amount of remaining gas can be discharged into the adjacent venting hole in the direction of the second arrow 1152.

Additionally, when gas is generated from inside the secondary battery, the gas may be accompanied by high-temperature heat and flame. Accordingly, even if a large amount of heat and flame is generated from the secondary battery, such heat and flame, along with most of the gas, can be discharged directly through the venting hole 1132 of the module cover, and even if the heat and flame are transmitted to the adjacent secondary battery, Even if it spreads, the adjacent secondary battery includes the heat blocking member 190, so it is possible to prevent heat and flame from spreading.

Here, the discharge and blocking of gas, heat, or flame has been described for the secondary battery module 1100, but of course, such discharge and blocking can be equally applied to the secondary battery pack described with respect to FIG. 8.

Although the present disclosure has been described in detail through specific examples, this is for the purpose of specifically explaining the present disclosure, and the present disclosure is not limited thereto, and can be understood by those skilled in the art within the technical spirit of the present disclosure. It is clear that modifications and improvements are possible.

All simple modifications or changes to the present disclosure fall within the scope of the present disclosure, and the specific scope of protection of the present disclosure will be made clear by the appended claims.

160: Housing 170: Sealing part
1710: first sealing part 1720: second sealing part
180: fixing member 1840: opening
190: Heat blocking member 1940: Opening part
1000: Secondary battery 1100: Secondary battery module
1200: Secondary battery pack

Claims (14)

electrode assembly;
a pouch-type housing including a receiving portion in which the electrode assembly is accommodated, and a sealing portion formed on at least a portion of a circumference along the circumference of the receiving portion;
In a first sealing part among the sealing parts, at least one fixing member coupled to the first sealing part to surround at least a portion of an outer surface of the first sealing part and including at least one opening; and
A pouch-type secondary battery comprising; a heat shielding member that blocks heat and flame of gas generated in the surrounding area by covering the opening. In claim 1,
The fixing member is
Clip-in, pouch-type secondary battery made of steel or aluminum-based metal members. In claim 1,
The upper surface of the fixing member is
Located on the first sealing part facing the top of the first sealing part,
On the upper surface
A pouch-type secondary battery in which the at least one opening is formed. In claim 1,
The heat blocking member is
A pouch-type secondary battery comprising a film, sheet, tape, or a combination thereof having at least one property of flame retardancy, incombustibility, and fire resistance and insulation. In claim 1,
The heat blocking member is
At least one opening that can be opened by the gas,
The opening part is
A pouch-type secondary battery including an incision that adjusts the amount of gas discharged and creates a gas discharge guide passage. In claim 5,
The opening part is
A pouch-type secondary battery located on the opening of the fixing member. In claim 5,
The incision is
A pouch-type secondary battery that is cut along a plurality of cut lines that may intersect each other at the center of the opening to form an incision site. Multiple pouch-type secondary batteries;
a module storage portion accommodating the pouch-type secondary battery; and
Includes a module cover covering the module storage portion,
The pouch-type secondary battery is
electrode assembly;
a pouch-type housing including a receiving portion in which the electrode assembly is accommodated, and a sealing portion formed on at least a portion of a circumference along the circumference of the receiving portion;
In a first sealing part among the sealing parts, at least one fixing member coupled to the first sealing part to surround at least a portion of an outer surface of the first sealing part and including at least one opening; and
A secondary battery module comprising; a heat-blocking member that blocks heat and flame of gas generated in the surrounding area by covering the opening. In claim 8,
In the module cover,
A secondary battery module in which a venting hole matching the gas discharge path of the opening of the fixing member is formed. In claim 8,
The heat blocking member is
At least one opening that can be opened by the gas,
In the module cover,
A secondary battery module in which a venting hole matching the gas discharge path of the opening is formed. A secondary battery module including a plurality of pouch-type secondary batteries;
A plurality of pack storage units accommodating the secondary battery modules; and
Includes a pack cover covering the pack storage portion,
The pouch-type secondary battery is
electrode assembly;
a pouch-type housing including a receiving portion in which the electrode assembly is accommodated, and a sealing portion formed on at least a portion of a circumference along the circumference of the receiving portion;
In a first sealing part among the sealing parts, at least one fixing member coupled to the first sealing part to surround at least a portion of an outer surface of the first sealing part and including at least one opening; and
A secondary battery pack comprising; a heat blocking member that covers the opening to block heat and flame of gas generated in the surrounding area. In claim 11,
The pack cover is a secondary battery pack that selectively covers at least a portion of a plurality of pack storage portions. In claim 11,
In the pack cover,
A secondary battery pack in which a venting hole matching the gas discharge path of the opening of the fixing member is formed. In claim 11,
The heat blocking member is
Contains at least one opening,
In the module cover,
A secondary battery pack in which a venting hole matching the gas discharge path of the opening is formed.