Battery cell packaging foam

Abstract

The embodiment of the utility model provides battery cell packaging foam, and relates to the technical field of battery cell packaging. The battery cell packaging foam is provided with a plurality of first containing grooves, the first containing grooves are used for installing the tops of battery cells, the bottom wall of each first containing groove is provided with an inclined exhaust groove, the side wall of each first containing groove is provided with a drainage groove, and the drainage grooves communicate with the inclined exhaust grooves. The battery cell packaging foam can prevent condensed water drops from corroding a battery cell pole, so that the storage safety and the subsequent use effect of the battery cell are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cell packaging, and more specifically, to a foam for packaging battery cells. Background Art

[0002] With the continuous development of the new energy industry, the technology of power batteries is also constantly improving. In production and manufacturing, it is necessary to install, store, and transport battery cells. For the storage of battery cells, currently, foam for packaging is usually used to package multiple battery cells and store them in a warehouse.

[0003] However, in a hot environment or during the rainy season, water vapor is likely to condense between the battery cells in the warehouse. Since the terminals of the battery cells have a metal structure, the water droplets formed by the condensed water vapor will corrode the terminals of the battery cells, resulting in problems such as poor subsequent use of the battery cells. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a foam for packaging battery cells, which can avoid the influence of the condensed water droplets on corroding the terminals of the battery cells, and improve the storage safety and subsequent use effect of the battery cells.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides a foam for packaging battery cells. The foam for packaging battery cells is provided with a plurality of first accommodation grooves for installing the tops of battery cells. The bottom wall of each of the first accommodation grooves is provided with an inclined exhaust groove, and the side wall of each of the first accommodation grooves is provided with a drainage groove. The drainage groove is communicated with the inclined exhaust groove.

[0007] In an alternative embodiment, the bottom wall of each of the first accommodation grooves is further provided with a positive electrode installation groove, an explosion-proof valve installation groove, and a negative electrode installation groove. The positive electrode installation groove, the explosion-proof valve installation groove, and the negative electrode installation groove are sequentially arranged at intervals along the length direction of the first accommodation groove.

[0008] The inclined exhaust groove is communicated with the explosion-proof valve installation groove, and the extending direction of the inclined exhaust groove forms an angle with the length direction of the first accommodation groove.

[0009] In an alternative embodiment, the inclined exhaust groove includes a first inclined groove, a second inclined groove, a third inclined groove, and a fourth inclined groove. The first inclined groove, the second inclined groove, the third inclined groove, and the fourth inclined groove are all communicated with the explosion-proof valve installation groove. The first inclined groove and the second inclined groove are located on the side of the explosion-proof valve installation groove close to the positive electrode installation groove, and the third inclined groove and the fourth inclined groove are located on the side of the explosion-proof valve installation groove close to the negative electrode installation groove.

[0010] The drainage grooves include a first drainage groove, a second drainage groove, a third drainage groove, and a fourth drainage groove. The first drainage groove and the third drainage groove are both located on one side wall of the first accommodation groove, and the second drainage groove and the fourth drainage groove are both located on the other side wall opposite to the first accommodation groove. The first drainage groove and the second drainage groove are located on opposite sides of the positive electrode installation groove, and the third drainage groove and the fourth drainage groove are located on opposite sides of the negative electrode installation groove;

[0011] The first drainage groove communicates with the first inclined groove, the second drainage groove communicates with the second inclined groove, the third drainage groove communicates with the third inclined groove, and the fourth drainage groove communicates with the fourth inclined groove.

[0012] In an alternative embodiment, the extending direction of the first inclined groove and the extending direction of the fourth inclined groove are on the same straight line, and the extending direction of the second inclined groove and the extending direction of the third inclined groove are on the same straight line.

[0013] In an alternative embodiment, the positive electrode installation groove communicates with both the first inclined groove and the second inclined groove, and the negative electrode installation groove communicates with both the third inclined groove and the fourth inclined groove.

[0014] In an alternative embodiment, the angle between the extending direction of the first inclined groove and the length direction of the first accommodation groove is 5° to 30°;

[0015] The angle between the extending direction of the second inclined groove and the length direction of the first accommodation groove is 5° to 30°;

[0016] The angle between the extending direction of the third inclined groove and the length direction of the first accommodation groove is 5° to 30°;

[0017] The angle between the extending direction of the fourth inclined groove and the length direction of the first accommodation groove is 5° to 30°.

[0018] In an alternative embodiment, the depth of the inclined exhaust groove is 1 mm to 10 mm, and the depth of the drainage groove is 1 mm to 10 mm.

[0019] In an alternative embodiment, the cell packaging foam is further provided with a plurality of second accommodation grooves. The plurality of second accommodation grooves and the plurality of first accommodation grooves are respectively located on opposite sides of the cell packaging foam, and the plurality of second accommodation grooves are used for installing the bottom of the cell.

[0020] In an alternative embodiment, insulating coatings are provided on both the inclined exhaust groove and the drainage groove.

[0021] In an alternative embodiment, the material of the insulating coating is polyurethane.

[0022] The beneficial effects of the embodiments of the present utility model include:

[0023] The cell packaging foam is provided with a plurality of first accommodating grooves for installing the tops of the cells. The bottom wall of each first accommodating groove is provided with an inclined exhaust groove, and the side wall of each first accommodating groove is provided with a drainage groove, and the drainage groove is communicated with the inclined exhaust groove. When packaging the cells, first place the plurality of cells corresponding to the arrangement mode of the plurality of first accommodating grooves, and then install the side of the cell packaging foam having the first accommodating grooves on the tops of the plurality of cells, so that the plurality of first accommodating grooves are installed corresponding to the plurality of cells one by one; since the bottom wall of the first accommodating groove is provided with an inclined exhaust groove, in a hot environment or during the plum rain season, the air in the top space of the cell can flow through the inclined exhaust groove, and moreover, since the side wall of the first accommodating groove is provided with a drainage groove communicated with the inclined exhaust groove, this can increase the air flow path, so that the humid air can flow faster, thereby avoiding the condensation of water vapor in the top space of the cell and preventing the water droplets formed by condensation from corroding the cell poles, improving the storage safety of the cells and the subsequent use effect. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the first perspective of the cell packaging foam provided by the embodiment of the present utility model;

[0026] Figure 2 It is a schematic structural diagram of the second perspective of the cell packaging foam provided by the embodiment of the present utility model;

[0027] Figure 3 is Figure 1 a partial enlarged view of part A in;

[0028] Figure 4 It is a schematic structural diagram of the first accommodating groove provided by the embodiment of the present utility model;

[0029] Figure 5 It is a schematic structural diagram of the third perspective of the cell packaging foam provided by the embodiment of the present utility model.

[0030] Icons: 100 - cell packaging foam; 10 - first accommodation groove; 20 - inclined exhaust groove; 21 - first inclined groove; 22 - second inclined groove; 23 - third inclined groove; 24 - fourth inclined groove; 30 - drainage groove; 31 - first drainage groove; 32 - second drainage groove; 33 - third drainage groove; 34 - fourth drainage groove; 40 - positive electrode installation groove; 50 - explosion-proof valve installation groove; 60 - negative electrode installation groove; 70 - second accommodation groove. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0033] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0035] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] As described in the background art, in production and manufacturing, it is necessary to install, store, and transport battery cells. For the storage of battery cells, currently, multiple battery cells are usually packaged with packaging foam and stored in a warehouse. However, in a hot environment or during the rainy season, water vapor condensation is likely to occur between the battery cells in the warehouse. Since the terminal posts of the battery cells have a metal structure, the water droplets formed by the condensation of water vapor will corrode the terminal posts of the battery cells, resulting in problems such as poor subsequent use of the battery cells.

[0038] Based on this, please refer to Figures 1 - 5 , an embodiment of the present utility model provides a battery cell packaging foam 100, which can effectively improve the above-mentioned technical problems. That is, it can avoid the influence of the condensed water droplets on corroding the terminal posts of the battery cells, improving the storage safety of the battery cells and the subsequent use effect. The battery cell packaging foam 100 will be described in detail below.

[0039] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic structural view of the battery cell packaging foam 100 provided in this embodiment from a first perspective, Figure 2 is a schematic structural view of the battery cell packaging foam 100 provided in this embodiment from a second perspective. Combining Figure 1 and Figure 2 , the battery cell packaging foam 100 is provided with a plurality of first accommodation grooves 10 for installing the tops of the battery cells. An inclined exhaust groove 20 is provided on the bottom wall of each first accommodation groove 10, and a drainage groove 30 is provided on the side wall of each first accommodation groove 10. The drainage groove 30 is communicated with the inclined exhaust groove 20.

[0040] That is to say, when packaging the battery cells, first place multiple battery cells correspondingly according to the arrangement of multiple first accommodating grooves 10, and then install the side of the battery cell packaging foam 100 with the first accommodating grooves 10 on the tops of the multiple battery cells, so that the multiple first accommodating grooves 10 are correspondingly installed with the multiple battery cells one by one; since the bottom wall of the first accommodating groove 10 is provided with an inclined exhaust groove 20, in a hot environment or during the rainy season, the air in the top space of the battery cell can flow through the inclined exhaust groove 20, and moreover, since the side wall of the first accommodating groove 10 is provided with a drainage groove 30 communicated with the inclined exhaust groove 20, this can increase the air flow path, enabling the humid and hot air to flow faster, thereby avoiding the condensation of water vapor in the top space of the battery cell and preventing the water droplets formed by the condensation from corroding the battery cell terminal posts, improving the storage safety of the battery cell and the subsequent use effect.

[0041] It should be noted that in some cases, the positive terminal post, explosion-proof valve, and negative terminal post of the battery cell are all located on the same side of the battery cell, that is, they are all located at the top position of the battery cell; therefore, in order to avoid the positive and negative terminal posts and the explosion-proof valve and better fit and install the first accommodating groove 10 with the top of the battery cell, in this embodiment, a positive terminal post installation groove 40, an explosion-proof valve installation groove 50, and a negative terminal post installation groove 60 are also respectively formed on the bottom wall of each first accommodating groove 10, and the positive terminal post installation groove 40, the explosion-proof valve installation groove 50, and the negative terminal post installation groove 60 are sequentially arranged at intervals along the length direction of the first accommodating groove 10; the inclined exhaust groove 20 is communicated with the explosion-proof valve installation groove 50, and the extending direction of the inclined exhaust groove 20 forms an angle with the length direction of the first accommodating groove 10.

[0042] Specifically, please refer to Figure 3 and Figure 4 , Figure 3 is Figure 1 the partial enlarged view of A in Figure 4 is the structural schematic diagram of the first accommodating groove 10 provided by this embodiment. Combining Figure 3 and Figure 4, the diagonal exhaust groove 20 includes a first inclined groove 21, a second inclined groove 22, a third inclined groove 23, and a fourth inclined groove 24. The first inclined groove 21, the second inclined groove 22, the third inclined groove 23, and the fourth inclined groove 24 are all communicated with the explosion-proof valve installation groove 50. The first inclined groove 21 and the second inclined groove 22 are located on one side of the explosion-proof valve installation groove 50 close to the positive electrode installation groove 40, and the third inclined groove 23 and the fourth inclined groove 24 are located on one side of the explosion-proof valve installation groove 50 close to the negative electrode installation groove 60. The drainage groove 30 includes a first drainage groove 31, a second drainage groove 32, a third drainage groove 33, and a fourth drainage groove 34. The first drainage groove 31 and the third drainage groove 33 are both located on one side wall of the first accommodation groove 10, and the second drainage groove 32 and the fourth drainage groove 34 are both located on the other side wall opposite to the first accommodation groove 10. The first drainage groove 31 and the second drainage groove 32 are located on opposite sides of the positive electrode installation groove 40, and the third drainage groove 33 and the fourth drainage groove 34 are located on opposite sides of the negative electrode installation groove 60. The first drainage groove 31 is communicated with the first inclined groove 21, the second drainage groove 32 is communicated with the second inclined groove 22, the third drainage groove 33 is communicated with the third inclined groove 23, and the fourth drainage groove 34 is communicated with the fourth inclined groove 24.

[0043] It should be noted that the length direction of the first accommodation groove 10 mentioned above is Figure 4 the B-B direction shown in Figure 3 and Figure 4 As shown, after the first inclined groove 21, the second inclined groove 22, the third inclined groove 23, and the fourth inclined groove 24 are all communicated with the explosion-proof valve installation groove 50, they respectively extend obliquely towards the periphery of the first accommodation groove 10, and then are respectively communicated with the first drainage groove 31, the second drainage groove 32, the third drainage groove 33, and the fourth drainage groove 34 which are dispersedly arranged on the two side walls of the first accommodation groove 10, so that the air in the top space of the battery cell can be discharged dispersedly towards the periphery, improving the flow rate of the humid and hot air and enhancing the heat dissipation effect.

[0044] Furthermore, in this embodiment, the positive electrode installation groove 40 is simultaneously communicated with the first inclined groove 21 and the second inclined groove 22, and the negative electrode installation groove 60 is simultaneously communicated with the third inclined groove 23 and the fourth inclined groove 24. In this way, the air in the positive electrode installation groove 40 and the negative electrode installation groove 60 can also be discharged through the diagonal exhaust groove 20 and the drainage groove 30, so as to realize the mutual penetration and flow of the air in the spaces where the positive and negative electrode posts and the explosion-proof valve of the battery cell are located, thereby further improving the flow rate of the humid and hot air and further enhancing the heat dissipation effect.

[0045] Of course, in other embodiments, the positive electrode mounting groove 40 may not be communicated with the first inclined groove 21 and the second inclined groove 22, and the negative electrode mounting groove 60 may also not be communicated with the third inclined groove 23 and the fourth inclined groove 24. In this way, even if there is water vapor in the inclined groove, the water droplets formed by its condensation will not flow into the positive electrode mounting groove 40 and the negative electrode mounting groove 60 through the corresponding inclined grooves, thereby avoiding the appearance of water droplets on the surfaces of the positive and negative electrode posts.

[0046] Please continue to combine Figure 3 and Figure 4 , in this embodiment, the extension direction C of the first inclined groove 21 and the extension direction F of the fourth inclined groove 24 are on the same straight line, and the extension direction D of the second inclined groove 22 and the extension direction E of the third inclined groove 23 are on the same straight line; through such a setting, during the production and manufacturing process of the battery cell packaging foam 100, it is convenient to process the inclined grooves, easy to realize the forming of the inclined grooves, and can improve the production efficiency. Of course, in other embodiments, the extension direction C of the first inclined groove 21 and the extension direction F of the fourth inclined groove 24 may not be on the same straight line, and the extension direction D of the second inclined groove 22 and the extension direction E of the third inclined groove 23 may also not be on the same straight line.

[0047] Please combine Figure 4 , optionally, the included angle θ1 between the extension direction C of the first inclined groove 21 and the length direction B of the first accommodating groove 10, the included angle θ2 between the extension direction D of the second inclined groove 22 and the length direction B of the first accommodating groove 10, the included angle θ3 between the extension direction E of the third inclined groove 23 and the length direction B of the first accommodating groove 10, and the included angle θ4 between the extension direction F of the fourth inclined groove 24 and the length direction B of the first accommodating groove 10 are all: 5° to 30°; for example, the included angle can be 5°, 10°, 15°, 20°, 25° or 30°, etc. Of course, in other embodiments, θ1, θ2, θ3 and θ4 can also be other values, and their specific angles need to be determined according to actual design requirements.

[0048] Optionally, the depth of the inclined exhaust groove 20 and the depth of the drainage groove 30 are both: 1 mm to 10 mm; for example, the depth can be 1 mm, 3 mm, 5 mm, 7 mm or 9 mm, etc. Of course, in some other embodiments, the depths of the inclined exhaust groove 20 and the drainage groove 30 can also be values in other ranges, and their specific depths need to be determined according to the specific design requirements of the battery cell packaging foam 100.

[0049] Furthermore, in order to reduce the problem of condensation on the surface of the battery cell or the packaging foam caused by temperature differences, insulating coatings are provided on both the diagonal exhaust grooves 20 and the drainage grooves 30. That is, in this embodiment, insulating coatings are provided on the first inclined groove 21, the second inclined groove 22, the third inclined groove 23, the fourth inclined groove 24, the first drainage groove 31, the second drainage groove 32, the third drainage groove 33, and the fourth drainage groove 34. The insulating coating can be in the form of foam glue, waterproof glue, hydrogel, etc., which can reduce the temperature difference of the air between the battery cell and the packaging foam, thereby preventing water vapor or liquid from appearing on the surface of the battery cell or the packaging foam and leaking to the positive and negative electrode posts of the battery cell, further preventing the corrosion of the electrode posts and ensuring the safety of the battery cell storage.

[0050] It should be noted that, in this embodiment, the material of the insulating coating is polyurethane, which has the characteristics of heat insulation, sound insulation, earthquake resistance, oil resistance, wear resistance, low temperature resistance, aging resistance, high hardness, and elasticity. Of course, in other embodiments, the material of the insulating coating can also be other materials such as polyethylene.

[0051] When actually packaging the battery cells, in addition to packaging the top of the battery cells, the bottom of the battery cells also needs to be packaged. Moreover, the battery cells can be stacked and packaged through the packaging foam. That is, after the top of a group of battery cells is packaged through the packaging foam, another group of battery cells is stacked above the previous group of battery cells, and the bottom of the other group of battery cells is continuously packaged through the packaging foam.

[0052] Therefore, in this embodiment, in order to improve the adaptability of the battery cell packaging foam 100, please refer to Figure 5 , Figure 5 is a schematic structural diagram of the third perspective of the battery cell packaging foam 100 provided in this embodiment. Combining Figure 2 and Figure 5 , the battery cell packaging foam 100 is also provided with a plurality of second accommodation grooves 70. The plurality of second accommodation grooves 70 and the plurality of first accommodation grooves 10 are located on opposite sides of the battery cell packaging foam 100, and the plurality of second accommodation grooves 70 are used to install the bottom of the battery cells. It is easy to understand that for the same battery cell packaging foam 100, it can be understood that the first accommodation groove 10 on its back is used to install the top of the first group of battery cells, and the second accommodation groove 70 on its reverse side is used to install the bottom of the second group of battery cells. In this way, by manufacturing the same type of battery cell packaging foam 100, the stacked packaging of multiple groups and multiple layers of battery cells can be realized, thereby saving costs and improving the packaging efficiency.

[0053] Furthermore, in this embodiment, the plurality of second accommodation grooves 70 are arranged in one-to-one correspondence with the plurality of first accommodation grooves 10. That is to say, the arrangement direction of the plurality of first accommodation grooves 10 is the same as that of the plurality of second accommodation grooves 70, which can also be understood as that their length extension directions are the same, and their width extension directions are also the same, so that the arrangement mode of each layer of the packaged battery cells is the same.

[0054] In summary, the embodiment of the present utility model provides a battery cell packaging foam 100. The battery cell packaging foam 100 is provided with a plurality of first accommodation grooves 10 for installing the tops of battery cells. An inclined exhaust groove 20 is formed in the bottom wall of each first accommodation groove 10, and a drainage groove 30 is formed in the side wall of each first accommodation groove 10. The drainage groove 30 is communicated with the inclined exhaust groove 20. When packaging the battery cells, first place the plurality of battery cells corresponding to the arrangement mode of the plurality of first accommodation grooves 10, and then install the side of the battery cell packaging foam 100 with the first accommodation grooves 10 on the tops of the plurality of battery cells, so that the plurality of first accommodation grooves 10 are installed in one-to-one correspondence with the plurality of battery cells; since the inclined exhaust groove 20 is provided in the bottom wall of the first accommodation groove 10, in a hot environment or during the rainy season, the air in the top space of the battery cell can flow through the inclined exhaust groove 20, and furthermore, since the drainage groove 30 communicated with the inclined exhaust groove 20 is provided in the side wall of the first accommodation groove 10, the air flow path can be increased, so that the humid air can flow faster, thereby avoiding the condensation of water vapor in the top space of the battery cell.

[0055] Therefore, the battery cell packaging foam 100 can avoid the influence of the water droplets formed by condensation on corroding the battery cell terminal posts, and improve the storage safety and subsequent use effect of the battery cells.

[0056] The above description is only for the specific embodiments of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A battery cell packaging foam, characterized in that: The cell packaging foam (100) is provided with a plurality of first accommodating grooves (10), the plurality of first accommodating grooves (10) being used to install the top of the cell, the bottom wall of each of the first accommodating grooves (10) being provided with an oblique exhaust groove (20), and the side wall of each of the first accommodating grooves (10) being provided with a drainage groove (30), the drainage groove (30) being connected to the oblique exhaust groove (20).

2. The battery cell packaging foam according to claim 1, characterized in that: The bottom wall of each of the first containing grooves (10) is also provided with a positive electrode installation groove (40), an explosion-proof valve installation groove (50) and a negative electrode installation groove (60), and the positive electrode installation groove (40), the explosion-proof valve installation groove (50) and the negative electrode installation groove (60) are sequentially arranged at intervals along the length direction of the first containing groove (10); The oblique exhaust groove (20) is in communication with the explosion-proof valve installation groove (50), and an extending direction of the oblique exhaust groove (20) is arranged at an angle to a length direction of the first accommodating groove (10).

3. The battery cell packaging foam according to claim 2, characterized in that: The oblique exhaust groove (20) comprises a first oblique groove (21), a second oblique groove (22), a third oblique groove (23) and a fourth oblique groove (24); the first oblique groove (21), the second oblique groove (22), the third oblique groove (23) and the fourth oblique groove (24) are all connected to the explosion-proof valve installation groove (50); the first oblique groove (21) and the second oblique groove (22) are located on a side of the explosion-proof valve installation groove (50) close to the positive electrode installation groove (40); and the third oblique groove (23) and the fourth oblique groove (24) are located on a side of the explosion-proof valve installation groove (50) close to the negative electrode installation groove (60); The drainage groove (30) comprises a first drainage groove (31), a second drainage groove (32), a third drainage groove (33) and a fourth drainage groove (34); the first drainage groove (31) and the third drainage groove (33) are both located on one side wall of the first containing groove (10); the second drainage groove (32) and the fourth drainage groove (34) are both located on the other side wall opposite to the first containing groove (10); the first drainage groove (31) and the second drainage groove (32) are located on two opposite sides of the positive electrode installation groove (40); and the third drainage groove (33) and the fourth drainage groove (34) are located on two opposite sides of the negative electrode installation groove (60); The first drainage groove (31) is connected to the first chute (21), the second drainage groove (32) is connected to the second chute (22), the third drainage groove (33) is connected to the third chute (23), and the fourth drainage groove (34) is connected to the fourth chute (24).

4. The battery cell packaging foam according to claim 3, characterized in that: The extension direction of the first inclined groove (21) and the extension direction of the fourth inclined groove (24) are on the same straight line, and the extension direction of the second inclined groove (22) and the extension direction of the third inclined groove (23) are on the same straight line.

5. The battery cell packaging foam according to claim 3, characterized in that: The positive electrode installation groove (40) is simultaneously connected to the first inclined groove (21) and the second inclined groove (22), and the negative electrode installation groove (60) is simultaneously connected to the third inclined groove (23) and the fourth inclined groove (24).

6. The battery cell packaging foam according to claim 3, characterized in that: The included angle between the extension direction of the first inclined groove (21) and the length direction of the first containing groove (10) is 5° to 30°; The included angle between the extension direction of the second inclined groove (22) and the length direction of the first containing groove (10) is 5° to 30°; The included angle between the extension direction of the third inclined groove (23) and the length direction of the first containing groove (10) is 5° to 30°; The included angle between the extension direction of the fourth inclined groove (24) and the length direction of the first containing groove (10) is 5° to 30°.

7. The battery cell packaging foam according to claim 1, characterized in that: The depth of the oblique exhaust groove (20) is 1 mm to 10 mm, and the depth of the drainage groove (30) is 1 mm to 10 mm.

8. The battery cell packaging foam according to claim 1, characterized in that: The battery cell packaging foam (100) is also provided with a plurality of second accommodating grooves (70), the plurality of second accommodating grooves (70) and the plurality of first accommodating grooves (10) are respectively located on two opposite sides of the battery cell packaging foam (100), and the plurality of second accommodating grooves (70) are used to install the bottom of the battery cell.

9. The battery cell packaging foam according to claim 1, characterized in that: The oblique exhaust groove (20) and the drainage groove (30) are both provided with an insulating coating.

10. The battery cell packaging foam according to claim 9, characterized in that: The material of the insulating coating is polyurethane.

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