Soft package and battery

Abstract

The utility model discloses a kind of soft package shell and battery, the soft package shell of utility model embodiment includes the containing cavity for containing electric core and the sealing edge area for sealing containing cavity.The sealing edge area includes the first aluminium plastic film and second aluminium plastic film of laminated arrangement, first aluminium plastic film and second aluminium plastic film between are provided with low melting point adhesive layer;Low melting point adhesive layer includes seal area, seal area has the inner edge close to containing cavity;Sealing edge area is provided with the notch of penetrating sealing edge area along its thickness direction, notch is located inner edge outside, and notch and inner edge are spaced apart The soft package shell of utility model embodiment not only can melt failure when the battery in soft package shell appears thermal runaway, instantaneously release high-pressure gas in soft package shell, avoid the problem of explosion;It can also release the heat and gas generated when the battery in soft package shell normal operation, avoid the problem of overheat and excessively high pressure in soft package shell.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a soft-pack casing and a battery. Background Technology

[0002] As end customers increase their demand for extended battery life, lithium-ion battery manufacturers are pushing the limits of cell design. Within the same volume, the proportion of the core that can deliver actual capacity is increasing, and even packaging materials are becoming thinner and lighter. However, this also brings more and more safety issues.

[0003] In order to address the safety risks of thermal runaway, some battery cells use low-melting-point PP sealing aluminum-plastic film: during thermal runaway, high temperature (>150℃) causes the PP to melt and fail, and the aluminum-plastic film ruptures to release high-pressure gas, thus avoiding an explosion.

[0004] However, during the normal charging and discharging process of the battery cell, electrode side reactions and electrolyte decomposition will continuously generate trace amounts of gas. The normal operating temperature is only -20℃ to 80℃, which is far below the PP melting threshold (120℃-140℃). The sealing layer remains intact, which leads to the continuous accumulation of trace amounts of gas and an increase in internal gas pressure.

[0005] In mild cases, it can cause cell bulging and performance degradation (reduced capacity and increased internal resistance). In severe cases, it can cause the internal pressure of the battery to exceed the limit, leading to unexpected rupture of the aluminum-plastic film or even explosion, creating a safety hazard.

[0006] Therefore, the solutions in the relevant technologies can only cover extreme scenarios of thermal runaway, and lack protection against the more common "normal trace gas accumulation" throughout the entire life cycle, resulting in a safety blind spot, which urgently needs technological improvement. Utility Model Content

[0007] This utility model provides a soft-pack housing to solve the problem in related technologies that the heat and gas generated during normal battery operation cannot be released.

[0008] The soft-pack housing of this utility model embodiment has a receiving cavity for accommodating the battery cell and a sealing area for sealing the receiving cavity; The sealing area includes a first aluminum-plastic film and a second aluminum-plastic film stacked together, with a low melting point adhesive layer disposed between the first aluminum-plastic film and the second aluminum-plastic film. The low-melting-point adhesive layer includes a sealing area having an inner edge close to the receiving cavity; The edge sealing area has a notch that extends through the edge sealing area along its thickness direction. The notch is located outside the inner edge and is spaced apart from the inner edge.

[0009] By setting a gap in the sealing area, the sealing strength of the sealing area is weakened at the gap. When the heat and gas released by the battery in the soft-pack casing reach the preset value, the weak point at the gap will be broken open, allowing excess gas and heat inside the soft-pack casing to be discharged from the gap, thus avoiding overheating and excessive pressure problems inside the soft-pack casing.

[0010] Meanwhile, a low-melting-point adhesive layer is set between the first and second aluminum-plastic film ribs in the sealing area. This layer can melt and fail when the battery inside the soft-pack casing experiences thermal runaway, instantly releasing the high-pressure gas inside the soft-pack casing and preventing explosions.

[0011] Therefore, the soft-pack casing of this utility model embodiment can not only melt and fail when the battery inside the soft-pack casing experiences thermal runaway, instantly releasing the high-pressure gas inside the soft-pack casing to avoid the problem of explosion; it can also release the heat and gas generated by the battery inside the soft-pack casing during normal operation, avoiding the problems of overheating and excessive pressure inside the soft-pack casing.

[0012] In some embodiments, the low-melting-point adhesive layer is a low-melting-point PP layer.

[0013] In some embodiments, the minimum distance between the notch and the inner edge is 0.6-1.0 mm.

[0014] In some embodiments, the notch is triangular or trapezoidal.

[0015] In some embodiments, there are multiple notches, and the multiple notches are spaced apart in the extension direction of the sealing area.

[0016] In some embodiments, the spacing E between adjacent notches is 1-2 mm.

[0017] In some embodiments, the low-melting-point adhesive layer further includes a first unsealed area and a second unsealed area, wherein the first unsealed area is disposed inside the sealing area and is connected to the sealing area, and the second unsealed area is disposed outside the sealing area and is connected to the sealing area; The width A of the low-melting-point adhesive layer is 1.4-2.0 mm; The width B of the sealing area is 0.8-1.2 mm; The width C of the first unsealed area is greater than 0.1 mm; The width D of the second unsealed area is greater than 0.1 mm.

[0018] In some embodiments, the sealing area includes a top sealing edge, a first side sealing edge, and a second side sealing edge. The first side sealing edge and the second side sealing edge are respectively disposed on both sides of the top sealing edge along its length direction. One end of the first side sealing edge is connected to one end of the top sealing edge, and one end of the second side sealing edge is connected to the other end of the top sealing edge. At least one of the top sealing edge, the first side sealing edge, and the second side sealing edge is provided with the notch.

[0019] In some embodiments, the notch at the top sealing edge is a top sealing notch, and there are multiple top sealing notches, which are spaced apart along the length of the top sealing edge; and / or The notch at the first side seal edge is designated as the first side seal notch. There are multiple first side seal notches, spaced apart along the length of the first side seal edge; and / or The notch at the second side sealing edge is designated as the second side sealing notch. There are multiple second side sealing notches, which are spaced apart along the length of the second side sealing edge.

[0020] This utility model also provides a battery.

[0021] The battery of this utility model embodiment includes a battery cell and a soft-pack casing as described in the above embodiment.

[0022] The battery cell includes a battery cell body and a tab connected to the battery cell body at one end. The other end of the tab extends through the low-melting-point adhesive layer to the outside of the soft-pack housing. Attached Figure Description To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the soft-shell shell according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the sealing area of ​​the soft-pack shell according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the battery structure according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the battery according to an embodiment of the present invention.

[0024] In the picture: 100. Soft-pack casing; 200. Battery; 1. Receiving cavity; 2. Edge sealing area; 201. First aluminum-plastic film; 202. Second aluminum-plastic film; 203. Low-melting-point adhesive layer; 2031. Sealing area; 2032. First unsealed area; 2033. Second unsealed area; 3. Gap; 301. Top sealing gap; 302. First side sealing gap; 303. Second side sealing gap; 4. Inner edge; 5. Top edge sealing; 6. First side edge sealing; 7. Second side edge sealing; 8. Battery cell; 801. Battery cell body; 802. Electrode tab. Detailed Implementation

[0025] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal encapsulation of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In order to solve the problem that the soft shell 100 in the related technology cannot release the trace amount of gas generated inside the soft shell 100, the present invention provides a soft shell 100.

[0029] The soft-pack housing 100 of this utility model embodiment includes a receiving cavity 1 for accommodating the battery cell 8 and a sealing area 2 for sealing the receiving cavity 1.

[0030] The sealing area 2 includes a first aluminum-plastic film 201 and a second aluminum-plastic film 202 stacked together, and a low melting point adhesive layer 203 is provided between the first aluminum-plastic film 201 and the second aluminum-plastic film 202. The low-melting-point adhesive layer 203 includes a sealing region 2031, which has an inner edge 4 near the receiving cavity 1; The edge sealing area 2 is provided with a notch 3 that runs through the edge sealing area 2 along its thickness direction. The notch 3 is located outside the inner edge 4 and is spaced apart from the inner edge 4. Specifically, the notch 3 penetrates the first aluminum-plastic film 201, the low-melting-point adhesive layer 203, and the second aluminum-plastic film 202.

[0031] By setting a notch 3 in the sealing area 2, the sealing strength of the sealing area 2 has a weak point at the notch 3. When the heat and gas released by the battery 200 of the soft housing 100 reach the preset value, the weak point at the notch 3 will be broken open, so that the excess gas and heat in the soft housing 100 can be discharged from the notch 3, avoiding the problems of overheating and excessive pressure in the soft housing 100.

[0032] Meanwhile, a low-melting-point adhesive layer 203 is provided between the first aluminum-plastic film 201 and the second aluminum-plastic film 202 in the sealing area 2. This layer can melt and fail when the battery 200 inside the soft-pack shell 100 experiences thermal runaway, instantly releasing the high-pressure gas inside the soft-pack shell 100 and preventing an explosion.

[0033] Therefore, the soft-pack housing 100 of this utility model embodiment can not only release the high-pressure gas inside the soft-pack housing 100 instantly when the battery 200 inside the soft-pack housing 100 fails due to thermal runaway, thus avoiding the problem of explosion; it can also release the heat and gas generated by the battery 200 inside the soft-pack housing 100 during normal operation, thus avoiding the problems of overheating and excessive pressure inside the soft-pack housing 100.

[0034] In some embodiments, the low-melting-point adhesive layer 203 is a low-melting-point PP layer.

[0035] Preferably, the low-melting-point PP layer has a melting point of 140-180℃, such as when the PP adhesive material is copolymer polypropylene.

[0036] The soft-pack housing 100 of this utility model embodiment is configured with a low-melting-point PP layer as the low-melting-point adhesive layer 203.

[0037] On the one hand, the melting point of the low-melting-point PP layer can be precisely controlled between the normal operating temperature threshold of the battery 200 and the critical temperature of thermal runaway, ensuring that the sealing layer maintains a high initial bonding strength under normal operating conditions and avoiding micro-leakage caused by ambient temperature fluctuations. On the other hand, when thermal runaway occurs, the low-melting-point PP layer can quickly melt and rupture, forming a gradient pressure relief channel with the sealing area 2 and the notch 3, which greatly shortens the time for the internal air pressure to drop to the safe threshold. On the other hand, the low-melting-point PP layer enables the first aluminum-plastic film 201 and the second aluminum-plastic film 202 to have a high connection strength, which meets the connection requirements between the first aluminum-plastic film 201 and the second aluminum-plastic film 202.

[0038] In some embodiments, the minimum distance between the notch 3 and the inner edge 4 is 0.6-1.0 mm.

[0039] Preferably, the minimum distance between the notch 3 and the inner edge 4 is 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1.0mm. It is understandable that the minimum distance between the notch 3 and the inner edge 4 determines the stability of the sealing area at the notch. If the minimum distance between the notch 3 and the inner edge 4 is too small, the battery may burst and leak during normal operation. If the minimum distance between the notch 3 and the inner edge 4 is too large, the heat and gas generated by the battery 200 inside the soft-pack casing 100 during normal operation cannot be released, thus avoiding overheating and excessive pressure inside the soft-pack casing 100.

[0040] Therefore, by setting the minimum distance between the notch 3 and the inner edge 4 within the range described above, the soft-pack housing of this utility model can avoid the problem of explosion and leakage during normal battery operation. At the same time, it can also release the heat and gas generated by the battery 200 during normal operation inside the soft-pack housing 100, thus avoiding overheating and excessive pressure inside the soft-pack housing 100.

[0041] In some embodiments, the notch 3 is triangular or trapezoidal.

[0042] The soft-pack housing 100 of this utility model sets the notch 3 as a triangle. The notch 3 is smaller at one end of the inner edge 4 of the sealing area 2, which has the characteristic of stress concentration at the tip. It can respond quickly and break first in the early stage of gas production in the battery 200, thus realizing early pressure release.

[0043] The triangular notch 3 is larger at one end of the inner edge 4 of the adjacent sealing area 2, which reduces the intensity of gas injection; At the same time, both of the above-mentioned notches 3 are easy to process by die stamping, and the specific shape of notch 3 can be selected according to actual needs.

[0044] In some embodiments, there are multiple notches 3, and the multiple notches 3 are spaced apart in the extension direction of the sealing area 2.

[0045] The soft-pack housing 100 of this embodiment of the invention significantly improves the safety protection performance of the soft-pack housing 100 by setting multiple notches 3 and spacing them apart in the extension direction of the sealing area 2. During the normal charging and discharging process of the battery 200, when a small amount of gas is generated inside, the multiple spaced notches 3 can balance the internal pressure of the housing through a multi-point release mechanism, avoiding housing bulging or sealing failure caused by local gas accumulation.

[0046] In some embodiments, the spacing E between adjacent notches 3 is 1-2 mm.

[0047] As shown in the figure, the spacing E between adjacent gaps 3 is the distance between the bottom center positions of adjacent gaps 3.

[0048] Preferably, the spacing E between adjacent notches 3 is 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2.0mm.

[0049] By setting the spacing E between adjacent notches 3 to the range described above, the overall strength of the soft-pack shell in this embodiment of the invention is ensured, and the structure of the soft-pack shell is prevented from weakening due to too many notches or too large spacing. At the same time, it is ensured that when a small amount of gas is generated inside the battery, each notch can respond in time and release pressure, effectively preventing safety hazards caused by gas accumulation.

[0050] Therefore, by setting the spacing between adjacent notches 3 to the above-mentioned range, it is possible to improve the safety performance of the soft-pack casing of this utility model embodiment, and further ensure the normal use and cycle life of the battery.

[0051] In some embodiments, the sealing area 2 includes a top sealing edge 5, a first side sealing edge 6, and a second side sealing edge 7. The first side sealing edge 6 and the second side sealing edge 7 are respectively disposed on both sides of the top sealing edge 5 along its length. One end of the first side sealing edge 6 is connected to one end of the top sealing edge 5, and one end of the second side sealing edge 7 is connected to the other end of the top sealing edge 5.

[0052] The width A of the low-melting-point adhesive layer 203 is 1.4-2.0 mm; Preferably, the width A of the low melting point adhesive layer 203 is 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm.

[0053] The width B of the sealed area 2031 is 0.8-1.2mm; Preferably, the width B of the sealing area 2031 is 0.8mm, 0.9mm, 1.0mm, 1.1mm, or 1.2mm.

[0054] The width C of the first unsealed zone 2032 is greater than 0.1 mm; The width D of the second unsealed zone 2033 is greater than 0.1 mm.

[0055] It is understandable that the width of the first unsealed area 2032 and the width of the second unsealed area 2033 depend on the position of the sealing area 2031 in the low melting point adhesive layer 203, but the width C of the first unsealed area 2032 should be greater than 0.1 mm, and the width D of the second unsealed area 2033 should be greater than 0.1 mm.

[0056] The soft-pack shell of this utility model sets the width A of the low-melting-point adhesive layer, the width B of the sealing area, the width C of the first unsealed area 2032, and the width D of the second unsealed area 2033 to the above range, which facilitates the hot-press sealing of the low-melting-point adhesive layer and ensures the structural stability of the sealing area.

[0057] like Figure 3 As shown, the soft-pack shell 100 of this utility model embodiment is rectangular and is formed by folding and sealing an aluminum-plastic film.

[0058] Furthermore, at least one of the top sealing edge 5, the first side sealing edge 6, and the second side sealing edge 7 is provided with a notch 3.

[0059] For example, the top sealing edge 5 has a notch 3; the first side sealing edge 6 has a notch 3; the second side sealing edge 7 has a notch 3; the top sealing edge 5 and the first side sealing edge 6 have notches 3; the top sealing edge 5 and the second side sealing edge 7 have notches 3; the first side sealing edge 6 and the second side sealing edge 7 have notches 3; the top sealing edge 5, the first side sealing edge 6 and the second side sealing edge 7 all have notches 3.

[0060] It is understandable that those skilled in the art can choose the specific setting method for gap 3 according to actual needs.

[0061] In some embodiments, the notch 3 on the top sealing edge 5 is a top sealing notch 301, and there are multiple top sealing notches 301, which are spaced apart in the length direction of the top sealing edge 5.

[0062] The soft-pack housing 100 of this embodiment of the invention significantly improves the safety protection performance of the soft-pack housing 100 by setting multiple top sealing notches 301. During the normal charging and discharging process of the battery 200, when a small amount of gas is generated inside, the multiple top sealing notches 301 arranged at intervals can balance the internal pressure of the housing through a multi-point release mechanism, avoiding housing bulging or sealing failure caused by local gas accumulation.

[0063] In some embodiments, the notch 3 on the first side sealing edge 6 is a first side sealing notch 302, and there are multiple first side sealing notches 302, which are spaced apart along the length of the first side sealing edge 6.

[0064] By providing multiple first side sealing notches 302, the soft-pack housing 100 of this embodiment can significantly improve the safety protection performance of the soft-pack housing 100. During the normal charging and discharging process of the battery 200, when a small amount of gas is generated inside, the multiple first side sealing notches 302 arranged at intervals can balance the internal pressure of the housing through a multi-point release mechanism, avoiding housing bulging or sealing failure caused by local gas accumulation.

[0065] In some embodiments, the notch 3 provided on the second side sealing edge 7 is a second side sealing notch 303, and there are multiple second side sealing notches 303, which are spaced apart in the length direction of the second side sealing edge 7.

[0066] By providing multiple second side sealing notches 303, the soft-pack housing 100 of this embodiment can significantly improve the safety protection performance of the soft-pack housing 100. During the normal charging and discharging process of the battery 200, when a small amount of gas is generated inside, the multiple spaced second side sealing notches 303 can balance the internal pressure of the housing through a multi-point release mechanism, avoiding housing bulging or sealing failure caused by local gas accumulation.

[0067] This utility model also provides a battery 200.

[0068] The battery 200 of this utility model embodiment includes a cell 8 and a soft-pack housing 100 as described in the above embodiment. The cell 8 includes a cell body 801 and a tab 802 connected to the cell body 801 at one end. The other end of the tab 802 extends through the low melting point adhesive layer 203 to the outside of the soft-pack housing 100.

[0069] It is understandable that, in order to facilitate the encapsulation of the first aluminum-plastic film 201 and the second aluminum-plastic film 202, a low-melting-point adhesive layer 203 is provided on the side of the first aluminum-plastic film 201 adjacent to the second aluminum-plastic film 202, and a low-melting-point adhesive layer 203 is also provided on the side of the second aluminum-plastic film 202 adjacent to the first aluminum-plastic film 201. During the battery encapsulation process, the tab 802 can be disposed between the low melting point adhesive layer 203 on the first aluminum-plastic film 201 and the low melting point adhesive layer 203 on the second aluminum-plastic film 202, and the other end of the tab 802 can extend to the outside of the soft-pack housing 100.

[0070] By hot pressing, the low-melting-point adhesive layer 203 on the first aluminum-plastic film 201 and the low-melting-point adhesive layer 203 on the second aluminum-plastic film 202 are thermally melted to form a single layer of low-melting-point aluminum-plastic film, while also achieving the effect of the tab 802 passing through the low-melting-point adhesive layer 203.

[0071] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A soft-pack housing, characterized in that, The soft-pack housing (100) has a receiving cavity (1) for accommodating the battery cell (8) and a sealing area (2) for sealing the receiving cavity (1). The sealing area (2) includes a first aluminum-plastic film (201) and a second aluminum-plastic film (202) stacked together, and a low melting point adhesive layer (203) is provided between the first aluminum-plastic film (201) and the second aluminum-plastic film (202). The low-melting-point adhesive layer (203) includes a sealing area (2031) having an inner edge (4) near the receiving cavity (1). The edge sealing area (2) is provided with a notch (3) that penetrates the edge sealing area (2) along its thickness direction. The notch (3) is located outside the inner edge (4) and is spaced apart from the inner edge (4).

2. The soft-pack housing according to claim 1, characterized in that, The low-melting-point adhesive layer (203) is a low-melting-point PP layer.

3. The soft-pack housing according to claim 1, characterized in that, The minimum distance between the notch (3) and the inner edge (4) is 0.6-1.0 mm.

4. The soft-pack housing according to claim 1, characterized in that, The notch (3) is triangular or trapezoidal.

5. The soft-pack housing according to claim 1, characterized in that, There are multiple gaps (3), and the multiple gaps (3) are spaced apart in the extension direction of the sealing area (2).

6. The soft-pack housing according to claim 5, characterized in that, The spacing E between adjacent gaps (3) is 1-2 mm.

7. The soft-pack housing according to claim 1, characterized in that, The low-melting-point adhesive layer (203) further includes a first unsealed area (2032) and a second unsealed area (2033). The first unsealed area (2032) is located inside the sealed area (2031) and is connected to the sealed area (2031). The second unsealed area (2033) is located outside the sealed area (2031) and is connected to the sealed area (2031). The width A of the low-melting-point adhesive layer (203) is 1.4-2.0 mm; The width B of the sealing area (2031) is 0.8-1.2 mm; The width C of the first unsealed area (2032) is greater than 0.1 mm; The width D of the second unsealed area (2033) is greater than 0.1 mm.

8. The soft-pack housing according to any one of claims 1-7, characterized in that, The sealing area (2) includes a top sealing edge (5), a first side sealing edge (6), and a second side sealing edge (7). The first side sealing edge (6) and the second side sealing edge (7) are respectively located on both sides of the top sealing edge (5) along its length. One end of the first side sealing edge (6) is connected to one end of the top sealing edge (5), and one end of the second side sealing edge (7) is connected to the other end of the top sealing edge (5). At least one of the top sealing edge (5), the first side sealing edge (6) and the second side sealing edge (7) is provided with the notch (3).

9. The soft-pack housing according to claim 8, characterized in that, The notch (3) at the top sealing edge (5) is designated as a top sealing notch (301), and there are multiple top sealing notches (301) spaced apart along the length of the top sealing edge (5); and / or The notch (3) on the first side seal (6) is designated as a first side seal notch (302). There are multiple first side seal notches (302), spaced apart along the length of the first side seal (6); and / or The notch (3) on the second side seal (7) is designated as the second side seal notch (303). There are multiple second side seal notches (303), and these multiple second side seal notches (303) are spaced apart along the length of the second side seal (7).

10. A battery (200), characterized in that, Includes a battery cell (8) and a soft-pack housing (100) as described in any one of claims 1-9, wherein the battery cell (8) includes a battery cell body (801) and a tab (802) connected at one end to the battery cell body (801), and the other end of the tab (802) extends through the low-melting-point adhesive layer (203) to the outside of the soft-pack housing.

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