Air bag

Abstract

The invention relates to the technical field of batteries, and discloses an air bag which comprises a packaging bag and a plurality of first parting strips. The packaging bag comprises a first bag area and a second bag area, and the first bag area and the second bag area are arranged at intervals in the first direction. The first bag area is provided with a first accommodating cavity, the second bag area is provided with a second accommodating cavity, the first accommodating cavity is communicated with the second accommodating cavity, and the first accommodating cavity is used for accommodating a battery cell. The multiple first partition strips are arranged in the second containing cavity at intervals in the first direction, first communicating holes are formed in the first partition strips, and every two adjacent first air storage cavities communicate with each other through the corresponding first communicating holes. On one hand, the bag body filled with gas can be independently cut from the gas bag for detection, the detection convenience is improved, on the other hand, the size of the first communication hole can be preset, the size of the first communication hole can ensure that the gas passes through, heat sealing is conducted on the first communication hole after the gas is collected, and the detection efficiency is improved. The possibility of air leakage of the air bag is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to an air bag. Background Art

[0002] In the process of battery cell development, the study of battery gas production behavior is very important for battery cell development. In high energy density batteries, high nickel / ultra-high nickel positive electrodes, silicon carbon / silicon oxygen negative electrodes and multi-added functional electrolytes have been widely used. How to simply and effectively study the gas production behavior of new chemical systems is one of the keys to accelerate the development of high specific energy batteries.

[0003] In the study of gas generation behavior, the battery cell is generally placed in an air bag, and the gas generated by the battery cell will remain in the air bag. The gas is then discharged by cutting a corner of the air bag, and the opening of the corner is heat-sealed so that the air bag can collect the gas again. However, this operation method can only directly connect the air bag to the detection device, which makes the detection very inconvenient. On the other hand, the heat sealing effect of the opening after cutting is not good, and there is a problem of air leakage. Moreover, the process of directly connecting the air bag to the detection device is accompanied by another disadvantage, that is, there is repeated disassembly and assembly of the battery cell test device, especially for batteries containing stress fixtures. It is difficult to restore the original stress state of the battery cell after reassembly. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in the study of gas generation behavior, the battery cell is generally placed in an air bag, and the gas generated by the battery cell will remain in the air bag. The gas is then discharged by cutting a corner of the air bag, and then the corner is heat-sealed so that the air bag can collect the gas again. However, this operation method can only directly connect the air bag to the detection device, which makes the detection very inconvenient. On the other hand, the heat sealing effect of the opening after cutting is not good, and there is a problem of air leakage.

[0005] In order to solve the above technical problems, the present invention provides an air bag for collecting gas generated by a battery cell during a reaction process, wherein the air bag has a first direction and a second direction intersecting each other, and comprises:

[0006] A packaging bag, the packaging bag comprising a first bag area and a second bag area, the first bag area and the second bag area are arranged at intervals along the first direction; the first bag area has a first accommodating cavity, the second bag area has a second accommodating cavity, the first accommodating cavity is connected to the second accommodating cavity, and the first accommodating cavity is used to accommodate the battery cell;

[0007] A plurality of first partition bars, which are arranged in the second accommodating cavity at intervals along the first direction, so as to divide the second accommodating cavity into a plurality of first air storage cavities arranged at intervals along the first direction; a first connecting hole is provided on the first partition bar, and the first connecting hole connects two adjacent first air storage cavities;

[0008] The first connecting hole can be closed to isolate two adjacent first gas storage chambers and configure the first gas storage chamber far away from the first accommodating chamber as a sealed chamber for storing gas.

[0009] Optionally, it also includes: a plurality of second partition bars; a plurality of second partition bars are arranged in the second accommodating cavity at intervals along the second direction to divide the first air storage cavity into a plurality of air storage chambers; a second connecting hole is provided on the second partition bar; the second connecting hole connects two adjacent air storage chambers in the second direction.

[0010] Optionally, the first connecting hole includes: a plurality of first sub-through holes; the first sub-through holes connect two adjacent gas storage chambers in the first direction.

[0011] Optionally, the second connecting hole includes: a plurality of second sub-through holes; the second sub-through holes connect two adjacent air storage chambers in the second direction.

[0012] Optionally, the first spacer strip is a heat-sealed body; and / or the second spacer strip is a heat-sealed body.

[0013] Optionally, the area of ​​the gas storage chamber is S cm -2 , satisfying: S≥10.

[0014] Optionally, the first partition bar extends along the second direction; and / or the second partition bar extends along the first direction.

[0015] Optionally, the thickness of the second partition bar is d1; in the second direction, the distance between the opposite sides of two adjacent second partition bars is W1; and the width of the first sub-through hole in the second direction is P1;

[0016] Among them, W1-2d1≥P1 is satisfied.

[0017] An air bag for collecting gas generated by a battery cell during a reaction process, the air bag having a first direction and a second direction intersecting each other, comprising:

[0018] A packaging bag, the packaging bag comprising a first bag area and a second bag area, the first bag area and the second bag area are arranged at intervals along the first direction; the first bag area has a first accommodating cavity, the second bag area has a second accommodating cavity, the first accommodating cavity is connected to the second accommodating cavity, and the first accommodating cavity is used to accommodate the battery cell;

[0019] A barrier strip and a plurality of second barrier strips, the plurality of second barrier strips being arranged in the second accommodating cavity at intervals along the second direction, the barrier strip being arranged at one end of the second barrier strip facing the first accommodating cavity, so as to divide the second accommodating cavity into a plurality of second air storage cavities arranged at intervals along the second direction; a second connecting hole is provided on the second barrier strip, the second connecting hole connects two adjacent second air storage cavities, and a plurality of third connecting holes are provided on the barrier strip, the plurality of third connecting holes respectively connect the first accommodating cavity and the second air storage cavity;

[0020] The second connecting hole and the third connecting hole can be closed to isolate two adjacent second gas storage chambers and configure one of the second gas storage chambers as a sealed chamber for storing gas.

[0021] Optionally, the second spacer strip is a heat sealable body; and / or the barrier strip is a heat sealable body.

[0022] Compared with the prior art, the air bag of the embodiment of the present invention has the following beneficial effects:

[0023] In an embodiment of the present invention, after the battery cell generates gas through a customized electrochemical testing step, the gas is driven into a first gas storage cavity farthest from the battery cell in a first direction, and then a first partition bar on a side of the first gas storage cavity close to the battery cell is heat-sealed so that a first connecting hole on the first partition bar is closed, so that the first gas storage cavity farthest from the battery cell in the first direction forms a sealed cavity, and the sealed cavity stores the gas generated in the customized electrochemical testing step, and then the first partition bar is cut along the extension direction of the first partition bar so that the first partition bar is separated into two parts in the first direction, so that a sealed bag is cut out of the bag body formed by the sealed cavity formed above, and one part of the cut first partition bar is used as a side of the sealed cavity, and the other part is used as a side of the packaging bag. Repeat the above steps until a sufficient number of bags are tested. Based on this, on the one hand, the present application can separately cut out bags containing gas from the air bag for testing, which improves the convenience of testing. On the other hand, the first connecting hole of the present application can be pre-set in size, and the size of the first connecting hole can ensure the passage of gas. After collecting the gas, the first connecting hole is heat-sealed to effectively reduce the possibility of air bag leakage. Secondly, during the testing process, when using the air bag of the present application, it is only necessary to transfer the cut sealed bag to the detection device for testing, and the air bag containing the battery cell does not need to be transferred. At the same time, it can also avoid repeated disassembly and assembly of the battery cell fixture, and minimize the interference of the gas extraction test on the electrochemical performance of the battery cell, thereby ensuring the effectiveness of the in-situ gas production behavior research. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the structure of an air bag shown in some embodiments of the present application;

[0025] Figure 2 is a schematic diagram of the structure of an air bag shown in some embodiments of the present application;

[0026] Figure 3 It is a schematic diagram of the structure of an air bag shown in other embodiments of the present application.

[0027] In the figure, 1, packaging bag; 11, first bag area; 111, first accommodating cavity; 12, second bag area; 121, second accommodating cavity; 2, first partition bar; 21, first connecting hole; 211, first sub-through hole; 3, first gas storage cavity; 4, second partition bar; 41, second connecting hole; 411, second sub-through hole; 5, barrier bar; 51, third connecting hole; 6, second gas storage cavity; 7, battery cell; 8, gas storage chamber; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] First, it should be noted that the top, bottom, upward, downward and other directions mentioned in this article are defined relative to the directions in the respective drawings, and they are relative concepts, and therefore can be changed according to different positions and different practical states. Therefore, these or other directions should not be understood as restrictive terms.

[0030] It should be noted that the term "comprising" does not exclude other elements or steps and "a" or "an" does not exclude a plurality.

[0031] In addition, it should be pointed out that any single technical feature described or implied in the embodiments of this document, or any single technical feature shown or implied in the accompanying drawings, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application that are not directly mentioned in this document.

[0032] It should also be understood that the terms "first", "second", etc. are used herein to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0033] It should be noted that in different drawings, the same reference numerals denote the same or substantially the same components.

[0034] like Figure 1 As shown, an air bag of a preferred embodiment of the present invention is used to collect gas generated by the battery cell 7 during the reaction process, and the collected gas is used to study the gas generation behavior of the battery cell 7. The air bag has a first direction X and a second direction Y intersecting each other, wherein the air bag includes: a packaging bag 1 and a plurality of first spacers 2.

[0035] The packaging bag 1 includes a first bag area 11 and a second bag area 12 , which are arranged at intervals along a first direction X. The first bag area 11 has a first accommodating cavity 111 , and the second bag area 12 has a second accommodating cavity 121 . The first accommodating cavity 111 is connected to the second accommodating cavity 121 , and the first accommodating cavity 111 is used to accommodate the battery cell 7 .

[0036] A plurality of first partition bars 2 are arranged in the second accommodating cavity 121 at intervals along the first direction X to divide the second accommodating cavity 121 into a plurality of first air storage cavities 3 arranged at intervals along the first direction X. A first connecting hole 21 is provided on the first partition bar 2 to connect two adjacent first air storage cavities 3.

[0037] Among them, the first communication hole 21 can be closed to isolate two adjacent first gas storage cavities 3, and the first gas storage cavity 3 far from the first accommodation cavity 111 is configured as a sealed cavity for storing gas.

[0038] Based on the above structure, in this application, the battery cell 7 is arranged in the first accommodation cavity 111 of the first bag area 11. After the battery cell 7 generates gas through a customized electrochemical test step, the gas is driven into the first gas storage cavity 3 that is farthest from the battery cell 7 in the first direction X. Then, the first partition 2 on the side of the first gas storage cavity 3 close to the battery cell 7 is heat-sealed so that the first communication hole 21 on the first partition 2 is closed, so that the first gas storage cavity 3 that is farthest from the battery cell 7 in the first direction X forms a sealed cavity, and the sealed cavity stores the gas generated in the customized electrochemical test step. Then, the first partition 2 adjacent to the sealed cavity is cut along the extension direction of the first partition 2, so that the first partition 2 is separated into two parts in the first direction X, and the bag body formed by the above-mentioned sealed cavity is cut into a sealed bag. One part of the first partition 2 after cutting is used as the side of the sealed cavity, and the other part is used as the side of the packaging bag 1. Repeat the above steps until a sufficient number of bag bodies are tested. Based on this, on the one hand, this application can separately cut out the bag body filled with gas from the air bag for detection. Compared with the previous method of connecting the detection device to the air bag to collect gas, this application separately sends the bag body filled with gas for inspection, thereby improving the convenience of detection. On the other hand, the size of the first communication hole 21 in this application can be preset, and the size of the first communication hole 21 only needs to ensure that gas can pass through. After collecting the gas, the first communication hole 21 is heat-sealed, effectively reducing the possibility of air leakage in the air bag. Secondly, when using the air bag of this application for detection, only the cut sealed bag needs to be transferred to the detection device for detection, and the air bag containing the battery cell 7 does not need to be transferred. At the same time, repeated disassembly and assembly of the battery cell fixture can be avoided, and the interference of gas sampling tests on the electrochemical performance of the battery cell 7 can be minimized, ensuring the effectiveness of in-situ gas generation behavior research.

[0039] Specifically, the air bag has a rectangular frame-shaped heat-sealing strip, and the sealed area surrounded by the frame-shaped heat-sealing strip is the area where the first bag area 11 and the second bag area 12 are located.

[0040] It should be noted that there are various ways to drive the gas into the first gas storage cavity 3 that is farthest from the battery cell 7 in the first direction X. For example: manually squeezing, or pressing the air bag along the direction away from the battery cell with a pressing block to drive the gas to the first gas storage cavity 3 that is farthest from the battery cell 7.

[0041] Here, it should be noted that the included angle formed by the first direction X and the second direction Y is a, and the value range of a is between 0° < a ≤ 90°. In this embodiment, preferably, the first direction X and the second direction Y are perpendicular to each other.

[0042] In one possible embodiment, see Figure 1 and Figure 2 The embodiment of the present invention further includes: a plurality of second partition bars 4. The plurality of second partition bars 4 are arranged in the second accommodating cavity 121 along the second direction Y to separate the first gas storage cavity 3 into a plurality of gas storage chambers 8. The second partition bars 4 are provided with second connecting holes 41, which connect two adjacent gas storage chambers 8 in the second direction Y.

[0043] Exemplarily, the first partition bar 2 and the second partition bar 4 are staggered and connected to each other, so as to separate out a plurality of air storage chambers 8 that are spaced apart in the first direction X and the second direction Y, and each air storage chamber 8 can be realized once. Preferably, the first partition bar 2 and the second partition bar 4 are staggered and connected in a perpendicular manner, so that in the first direction X, the air storage chambers 8 are connected through the first connecting holes 21, and in the second direction Y, the air storage chambers 8 are connected through the second connecting holes 41.

[0044] Further, see Figure 1 and Figure 2 The first connecting hole 21 includes: a plurality of first sub-through holes 211, the first sub-through holes 211 connect two adjacent air storage chambers 8 in the first direction X, and the plurality of first sub-through holes 211 are arranged on the first partition bar 2 at intervals along the second direction Y.

[0045] Further, see Figure 1 and Figure 2 The second connecting hole 41 includes: a plurality of second sub-through holes 411. The second sub-through holes 411 connect two adjacent air storage chambers 8 in the second direction Y, and the plurality of second sub-through holes 411 are arranged on the second partition bar 4 at intervals along the first direction X.

[0046] In this embodiment, when it is necessary to collect the gas generated by the battery cell 7 during the reaction process, the gas is driven into the gas storage chamber 8 in a row (the gas storage chambers 8 in this row are arranged at intervals along the second direction Y) farthest from the battery cell 7 in the first direction X, and then the first partition bar 2 farthest from the battery cell 7 is heat-sealed so that the multiple gas storage chambers 8 farthest from the battery cell 7 in the first direction X are connected and form a sealed cavity, and finally the gas is driven into one of the multiple gas storage chambers 8, and the second partition bar 4 adjacent to the gas storage chamber 8 is heat-sealed so that the first sub-through hole 211 of the first partition bar 2 and the second sub-through hole 411 on the second partition bar 4 are closed, so that the gas storage chamber 8 storing the gas forms a sealed cavity, and the first partition bar 2 and the second partition bar 4 around the sealed cavity are cut to cut the bag body formed by the sealed cavity formed above into a sealed bag. Repeat the above steps until a sufficient number of bags are tested.

[0047] In a possible embodiment, the first spacer bar 2 is a heat-sealed body. And / or, the second spacer bar 4 is a heat-sealed body. The heat-sealed body is made of a material with good heat-sealing properties, and can be heat-sealed on the first spacer bar 2 or the second spacer bar 4 by a heat-sealing machine, so that the first sub-through hole 211 and the second sub-through hole 411 on the first spacer bar 2 or the second spacer bar 4 can be sealed.

[0048] Specifically, the first spacer 2 and the second spacer 4 can include at least one of the following film layers: a low density polyethylene (LDPE) film layer, a LLDPE film layer, an ethylene-vinyl acetate copolymer (EVA) film layer, a high density polyethylene (HDPE) film layer or a PP film layer.

[0049] In order to meet the demand for air intake, the area of ​​the air storage chamber 8 is S cm -2 , satisfying: S≥10, so that the gas storage chamber 8 can store enough gas for detection.

[0050] In one possible embodiment, see Figure 2 The thickness of the second partition bar 4 is d1. In the second direction Y, the distance between the opposite sides of two adjacent second partition bars 4 is W1. The width of the first sub-through hole 211 in the second direction Y is P1.

[0051] The condition W1-2d1≥P1 is satisfied, so that the width of the first sub-through hole 211 in the second direction Y is smaller than the distance between the opposite sides of two adjacent second partition bars 4 , so that the first sub-through hole 211 has enough space for gas to enter the gas storage chamber 8 .

[0052] See also Figure 3 The present invention also provides an air bag of another embodiment, which is used to collect the gas generated by the battery cell 7 during the reaction process. The air bag has an intersecting first direction X and a second direction Y. The air bag includes: a packaging bag 1, a barrier strip 5 and a plurality of second spacers 4.

[0053] The packaging bag 1 includes a first bag area 11 and a second bag area 12, which are arranged at intervals along a first direction X. The first bag area 11 has a first accommodating cavity 111, and the second bag area 12 has a second accommodating cavity 121. The first accommodating cavity 111 is connected to the second accommodating cavity 121, and the first accommodating cavity 111 is used to accommodate the battery cell 7.

[0054] A plurality of second partition bars 4 are arranged in the second accommodating cavity 121 at intervals along the second direction Y, and the barrier bar 5 is arranged at one end of the second partition bar 4 facing the first accommodating cavity 111, so as to divide the second accommodating cavity 121 into a plurality of second air storage cavities 6 arranged at intervals along the second direction Y. A second connecting hole 41 is provided on the second partition bar 4, and the second connecting hole 41 connects two adjacent second air storage cavities 6, and a plurality of third connecting holes 51 are provided on the barrier bar 5, and the plurality of third connecting holes 51 connect the first accommodating cavity 111 and the second air storage cavity 6 respectively.

[0055] The second connecting hole 41 and the third connecting hole 51 can be closed to isolate two adjacent second gas storage chambers 6 and configure one of the second gas storage chambers 6 as a sealed chamber for storing gas.

[0056] Based on the above structure, the present application will arrange the battery cell 7 in the first accommodating cavity 111 of the first bag area 11, and after the battery cell 7 generates gas after the customized electrochemical test step, the gas is driven into any second gas storage cavity 6 in the second direction Y, and then the barrier strips 5 and the second partition strips 4 around the second gas storage cavity 6 storing the gas are heat-sealed so that the third connecting hole 51 on the barrier strip 5 and the second connecting hole 41 on the second partition strip 4 are closed, and then the second partition strip 4 is cut along the extension direction of the second partition strip 4 and the barrier strip 5 is cut along the extension direction of the barrier strip 5, so that the second partition strip 4 is divided into two parts in the second direction Y and the barrier strip 5 is divided into two parts along the first direction X, so as to cut the bag body formed by the above-mentioned sealed cavity into a sealed bag, and one part of the cut second partition strip 4 is used as the side of the sealed cavity, and the other part is used as the side of the packaging bag 1. Repeat the above steps until a sufficient number of bags are tested. Based on this, the present application can, on the one hand, cut out bags containing gas from the air bag for testing. Compared with the previous method of requiring the detection device to connect the air bag to collect gas, the present application improves the convenience of testing by sending the bags containing gas for testing separately. On the other hand, the second connecting hole 41 and the third connecting hole 51 of the present application can be pre-set in size. The size of the second connecting hole 41 and the third connecting hole 51 can ensure the passage of gas. After collecting the gas, the second connecting hole 41 and the third connecting hole 51 are heat-sealed to effectively reduce the possibility of air bag leakage. Secondly, when using the air bag of the present application, it is only necessary to transfer the cut sealed bag to the detection device for testing during the detection process. The air bag containing the battery cell 7 does not need to be transferred. At the same time, it can also avoid repeated disassembly and assembly of the battery cell fixture, and minimize the interference of the gas extraction test on the electrochemical performance of the battery cell 7, thereby ensuring the effectiveness of the in-situ gas production behavior research.

[0057] In a possible embodiment, the second spacer bar 4 is a heat-sealed body, and / or the barrier bar 5 is a heat-sealed body. The heat-sealed body is made of a material with good heat-sealing properties, and can be heat-sealed on the barrier bar 5 or the second spacer bar 4 by a heat-sealing machine, so that the third through hole and the second connecting hole 41 on the barrier bar 5 or the second spacer bar 4 can be closed.

[0058] Specifically, the barrier strip 5 and the second barrier strip 4 can include at least one of the following film layers: a low density polyethylene (LDPE) film layer, an LLDPE film layer, an ethylene-vinyl acetate copolymer (EVA) film layer, a high density polyethylene (HDPE) film layer or a PP film layer.

[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An air bag for collecting gas generated during a reaction of a battery cell, the air bag having a first direction (X) and a second direction (Y) intersecting each other, characterized in that: include: A packaging bag (1), the packaging bag (1) comprising a first bag area (11) and a second bag area (12), the first bag area (11) and the second bag area (12) being arranged at intervals along the first direction (X); the first bag area (11) having a first accommodating cavity (111), the second bag area (12) having a second accommodating cavity (121), the first accommodating cavity (111) being connected to the second accommodating cavity (121), the first accommodating cavity (111) being used to accommodate the battery cell (7); A plurality of first partition bars (2), the plurality of first partition bars (2) being arranged at intervals in the second accommodating cavity (121) along the first direction (X), so as to divide the second accommodating cavity (121) into a plurality of first air storage cavities (3) arranged at intervals along the first direction (X); a first connecting hole (21) is provided on the first partition bar (2), and the first connecting hole (21) connects two adjacent first air storage cavities (3); The first connecting hole (21) can be closed to isolate two adjacent first gas storage chambers (3) and configure the first gas storage chamber (3) away from the first accommodating chamber (111) as a sealed chamber for storing gas.

2. The airbag according to claim 1, characterized in that: Also includes: A plurality of second partition bars (4); the plurality of second partition bars (4) are arranged in the second accommodating cavity (121) at intervals along the second direction (Y) to divide the first gas storage cavity (3) into a plurality of gas storage chambers (8); a second connecting hole (41) is provided on the second partition bar (4); the second connecting hole (41) connects two adjacent gas storage chambers (8) in the second direction (Y).

3. The airbag according to claim 2, characterized in that: The first connecting hole (21) comprises: a plurality of first sub-through holes (211); the first sub-through holes (211) are connected to two adjacent gas storage chambers (8) in the first direction (X).

4. The airbag according to claim 2 or 3, characterized in that: The second connecting hole (41) comprises: a plurality of second sub-through holes (411); the second sub-through holes (411) are connected to two adjacent gas storage chambers (8) in the second direction (Y).

5. The airbag according to claim 2, characterized in that: The first spacer bar (2) is a heat-sealed body; and / or the second spacer bar (4) is a heat-sealed body.

6. The airbag according to claim 3, characterized in that: The area of ​​the gas storage chamber (8) is S cm -2 , satisfying: S≥10.

7. The airbag according to claim 2, characterized in that: The first partition bar (2) extends along the second direction (Y); and / or the second partition bar (4) extends along the first direction (X).

8. The airbag according to claim 3, characterized in that: The thickness of the second partition bar (4) is d1; in the second direction (Y), the distance between the opposite sides of two adjacent second partition bars (4) is W1; the width of the first sub-through hole (211) in the second direction (Y) is P1; Among them, W1-2d1≥P1 is satisfied.

9. An air bag for collecting gas generated during a reaction of a battery cell, the air bag having a first direction (X) and a second direction (Y) intersecting each other, characterized in that: include: A packaging bag (1), the packaging bag (1) comprising a first bag area (11) and a second bag area (12), the first bag area (11) and the second bag area (12) being arranged at intervals along the first direction (X); the first bag area (11) having a first accommodating cavity (111), the second bag area (12) having a second accommodating cavity (121), the first accommodating cavity (111) being connected to the second accommodating cavity (121), the first accommodating cavity (111) being used to accommodate the battery cell (7); A barrier strip (5) and a plurality of second barrier strips (4), wherein the plurality of second barrier strips (4) are arranged at intervals in the second accommodating cavity (121) along the second direction (Y), and the barrier strip (5) is arranged at one end of the second barrier strip (4) facing the first accommodating cavity (111) so as to separate the second accommodating cavity (121) into a plurality of second air storage cavities (6) arranged at intervals along the second direction (Y); a second connecting hole (41) is provided on the second barrier strip (4), wherein the second connecting hole (41) connects two adjacent second air storage cavities (6); a plurality of third connecting holes (51) are provided on the barrier strip (5), wherein the plurality of third connecting holes (51) respectively connect the first accommodating cavity (111) and the second air storage cavity (6); The second connecting hole (41) and the third connecting hole (51) can be sealed to isolate two adjacent second gas storage chambers (6) and configure one of the second gas storage chambers (6) as a sealed chamber for storing gas.

10. The airbag according to claim 9, characterized in that The second spacer strip (4) is a heat-sealable body; and / or the barrier strip (5) is a heat-sealable body.

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