Insulating film and battery

Abstract

The utility model provides an insulating film and a battery, and relates to the technical field of batteries. The insulating film comprises a wrapping main body and a plugging part. The wrapping main body is used for wrapping the cell assembly; the wrapping body is provided with a fixing part, and at least two inserting holes are formed in the fixing part. The inserting part is connected to the wrapping main body; wherein the plugging part is configured as follows: after the wrapping main body wraps the outer part of the battery cell assembly, the plugging part sequentially penetrates through the plurality of plugging holes, so that the wrapping main body is fixed on the outer surface of the battery cell assembly. The battery provided by the utility model adopts the insulating film. According to the insulating film and the battery provided by the utility model, the technical problems of complex manufacturing process and high cost of a battery cell in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an insulating film and a battery. Background Art

[0002] With the continuous rise of the new energy vehicle industry, the market for power batteries is expanding. In order to meet market demand, the life of battery cells has attracted much attention.

[0003] During the preparation process, the battery cell components need to undergo insulation and other processes to ensure safety and lifespan during actual use. The existing process is to fix the mylar film on the battery cell. The commonly used process is the gluing process, which has a complex process and high cost. Utility Model Content

[0004] The technical problem solved by the utility model is how to improve the technical problem of complex and high cost of battery core manufacturing process in the prior art.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the utility model provides an insulating film for wrapping a battery core assembly, the insulating film comprising:

[0007] A wrapping body, used to wrap the battery core assembly; the wrapping body has a fixing portion, and the fixing portion is provided with at least two plug holes;

[0008] The plug-in part is connected to the wrapping body; wherein the plug-in part is configured as follows: after the wrapping body is wrapped around the outside of the battery cell assembly, the plug-in part passes through the plurality of plug-in holes in sequence to fix the wrapping body to the outer surface of the battery cell assembly.

[0009] Optionally, the plug-in portion includes a connecting section and a plug-in section, the connecting section is connected to the package body, the plug-in section is connected to the connecting section, and the plug-in section passes through the plug-in hole in sequence; the width of the plug-in section is the same as the width of the plug-in hole.

[0010] Optionally, the width of the plugging holes gradually decreases along the arrangement direction thereof, and the width of the plugging portions gradually decreases; the plugging portions sequentially pass through the plugging holes from one side of the plugging holes with a wider width.

[0011] Optionally, multiple limiting sections are provided on both sides of the plug-in part. When the plug-in part passes through the plug-in holes in sequence, the limiting sections pass over the plug-in holes and fit into the fixed part, and the multiple limiting sections are staggered with the multiple plug-in holes in the arrangement direction of the multiple plug-in holes.

[0012] Optionally, a through hole is provided on the fixing portion, the through hole is located between two adjacent plug holes, and the limiting section passes through the fixing portion from the through hole.

[0013] Optionally, the package body has at least two fixing parts, and the two fixing parts are arranged overlappingly; the plug-in holes on the two fixing parts correspond one to one, and the two corresponding plug-in holes together form a through hole; the plug-in part passes through multiple through holes in sequence.

[0014] Optionally, the battery cell assembly has a top surface, a bottom surface, two first side surfaces opposite to each other along its length direction, and two second side surfaces opposite to each other along its thickness direction; the package body further has a first fitting portion and a second fitting portion;

[0015] The first bonding portion is wrapped around the outside of the bottom surface;

[0016] The second fitting portion is connected to one side of the first fitting portion and wrapped around the outside of the second side surface;

[0017] The fixing portion is connected to one side of the second fitting portion and wrapped around the outside of the first side surface; the inserting portion is connected to one side of the first fitting portion adjacent to the second fitting portion.

[0018] Optionally, there are two second fitting parts, and the two second fitting parts are respectively arranged on two opposite sides of the first fitting part; there are two plug-in parts, and the two plug-in parts are respectively arranged on two opposite sides of the first fitting part; the fixing parts are provided on both sides of any second fitting part along its length direction, and the fixing parts located on both sides of the second fitting part are respectively wrapped around the outside of the two first side faces.

[0019] Optionally, the first fitting portion, the second fitting portion, the plug-in portion and the fixing portion are integrally formed.

[0020] A battery comprises a cell assembly, a shell and the above-mentioned insulating film, wherein the insulating film is wrapped around the outside of the cell assembly and the cell assembly is arranged inside the shell.

[0021] The insulating film and battery provided by the utility model have the following beneficial effects compared with the prior art:

[0022] When the insulating film is applied to a battery, the wrapping body wraps the battery cell assembly, and then the plug-in portion on the wrapping body is inserted into the plug-in hole, so that the wrapping body is fixed to the outer surface of the battery cell assembly; the plug-in portion is inserted into the wrapping body through the plug-in hole, which can provide a stabilizing effect for the wrapping body, and can reduce the manufacturing process compared to the fixing method by gluing in the prior art. Based on this, the insulating film provided in this embodiment and the battery using the insulating film can improve the technical problems of complex battery cell manufacturing process and high cost in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of a structure in which an insulating film is wrapped around the outside of a battery cell assembly provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the structure of an insulating film provided in an embodiment of the present application when it is unfolded;

[0026] Figure 3 This is a schematic diagram of a structure in which another insulating film provided in an embodiment of the present application is wrapped around the outside of a battery cell assembly;

[0027] Figure 4 A schematic diagram of the structure of another insulating film provided in an embodiment of the present application when it is unfolded;

[0028] Figure 5 This is a schematic diagram of a structure in which another insulating film provided in an embodiment of the present application is wrapped around the outside of a battery cell assembly;

[0029] Figure 6 This is a schematic diagram of the structure of another insulating film provided in an embodiment of the present application when it is unfolded.

[0030] Icons: 10 - insulating film; 11 - battery cell assembly; 100 - package body; 110 - fixing part; 111 - plug-in hole; 112 - through hole; 120 - first fitting part; 130 - second fitting part; 200 - plug-in part; 210 - plug-in section; 220 - connecting section; 230 - limiting section. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0035] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0037] A battery is provided in an embodiment of the present application. The battery is used to store electrical energy and can provide electrical energy to the electrical equipment when connected to the electrical equipment.

[0038] In this embodiment, the battery includes a cell assembly 11, a shell and an insulating film 10. The insulating film 10 is as shown in FIG. Figure 2 The insulating film 10 is wrapped around the outside of the battery cell assembly 11, such as Figure 1 The battery cell assembly 11 is arranged inside the shell. The insulating film 10 can improve the technical problem of the complicated manufacturing process of the battery cell in the prior art. Based on this, the battery using the insulating film 10 can also improve the technical problem of the complicated manufacturing process of the battery cell in the prior art.

[0039] Please refer to Figure 1 and Figure 2 , the insulating film 10 includes a wrapping body 100 and a plug-in portion 200. The wrapping body 100 is used to wrap the battery cell assembly 11; the wrapping body 100 has a fixing portion 110, and at least two plug-in holes 111 are opened on the fixing portion 110. The plug-in portion 200 is connected to the wrapping body 100; wherein the plug-in portion 200 is configured as follows: after the wrapping body 100 is wrapped around the outside of the battery cell assembly 11, the plug-in portion 200 sequentially passes through a plurality of plug-in holes 111, so that the wrapping body 100 is fixed to the outer surface of the battery cell assembly 11. It is worth noting that when the insulating film 10 is in the unfolded state, the plug-in portion 200 and the fixing portion 110 are located at different positions of the wrapping body 100; and when the wrapping body 100 is wrapped around the outside of the battery cell assembly 11, the plug-in portion 200 can be inserted into the fixing portion 110, and the wrapping body 100 is maintained in the state of wrapping the battery cell assembly 11 through the connection between the plug-in portion 200 and the fixing portion 110, providing a fixing effect.

[0040] The plug-in part 200 passes through a plurality of plug-in holes 111 in sequence, and can be inserted from the outside of the fixing part 110 into the inside of the fixing part 110, and then passed out to the outside of the fixing part 110, thus forming a suture-like manner, so that the fixing part 110 and the plug-in part 200 are firmly connected, thereby achieving the purpose of firmly wrapping the wrapped main body 100 around the outside of the battery cell assembly 11.

[0041] When the insulating film 10 is applied to a battery, the wrapping body 100 wraps the battery cell assembly 11, and then the plug-in portion 200 on the wrapping body 100 is inserted into the plug-in hole 111, so that the wrapping body 100 is fixed on the outer surface of the battery cell assembly 11; the plug-in portion 200 is inserted into the wrapping body 100 through the plug-in hole 111, which can provide a stabilizing effect for the wrapping body 100, and can reduce the manufacturing process compared to the fixing method by gluing in the prior art. Based on this, the insulating film 10 provided in this embodiment and the battery using the insulating film 10 can improve the technical problems of complex battery cell manufacturing process and high cost in the prior art.

[0042] In addition, it should be noted that, in this embodiment, the plug hole 111 is an opening with a certain area formed on the fixing portion 110. In other embodiments, the plug hole 111 may also be a linear gap, as long as the plug portion 200 can pass through it.

[0043] Furthermore, three plug holes 111 are provided on the fixing portion 110, and the plug part 200 is configured to pass through the three plug holes 111 in sequence. When three plug holes 111 are provided on the fixing portion 110, the plug part 200 is inserted into the first plug hole 111 from the outside of the fixing portion 110 and then enters the inside of the fixing portion 110 (between the fixing portion 110 and the battery cell assembly 11); then, it passes through the second plug hole 111 to the outside of the fixing portion 110 (the side of the fixing portion 110 away from the battery cell assembly 11); and then passes through the third plug hole 111 to the inside of the fixing portion 110. In this way, the free end of the plug part 200 (the end relative to the connection with the package body 100) can be pressed between the fixing portion 110 and the battery cell assembly 11, so as to prevent the plug part 200 from warping up and affecting the subsequent process execution.

[0044] It should be understood that in other embodiments of the present application, the number of the plug holes 111 can also be adjusted according to actual conditions. It is only necessary to make the plug part 200 go back and forth into the inside of the fixed part 110 and out to the outside of the fixed part 110 to achieve a stable connection between the fixed part 110 and the plug part 200, thereby achieving the purpose of stably wrapping the wrapped body 100 on the outside of the battery cell assembly 11. For example, the number of the plug holes 111 can be an even number, such as two, four or more; for another example, the number of the plug holes 111 can also be an odd number, such as three, five or more. Further, in the present embodiment, the number of the plug holes 111 is preferably an odd number, so as to ensure that after the plug part 200 passes through a plurality of plug holes 111 in sequence, the free end of the plug part 200 can be pressed between the fixed part 110 and the battery cell assembly 11.

[0045] In one implementation of this embodiment, Figure 1 and Figure 2 The plug-in portion 200 includes a connecting section 220 and a plug-in section 210. The connecting section 220 is connected to the package body 100, and the plug-in section 210 is connected to the connecting section 220. The plug-in section 210 sequentially passes through the plurality of plug-in holes 111. The width of the plug-in section 210 is the same as the width of the plug-in holes 111. In this case, when the plug-in section 210 sequentially passes through the plurality of plug-in holes 111, the plug-in section 210 is adapted to the plug-in holes 111.

[0046] Optionally, in another implementation of this embodiment, as Figure 3 and Figure 4, the width of the plug hole 111 gradually decreases along its arrangement direction, and the width of the plug part 200 also gradually decreases; the plug part 200 passes through the plug hole 111 from the side of the wider plug hole 111 in sequence. Based on this, when the free end of the plug part 200 is inserted from the wider plug hole 111, the width of the free end of the plug part 200 is smaller than the width of the plug hole 111, which facilitates the insertion of the plug part 200 into the plug hole 111, reduces the difficulty of assembly between the plug part 200 and the fixing part 110, and improves assembly efficiency. Figure 3 In the case of an example, the arrangement direction of the plug holes 111 can be regarded as a direction from bottom to top; Figure 4 For example, the arrangement direction of the plug holes 111 refers to the direction from the end of the fixing portion 110 close to the first fitting portion 120 to the end of the fixing portion 110 away from the first fitting portion 120 .

[0047] It is worth noting that in some embodiments, the width of some plug holes 111 may be gradually reduced along the arrangement direction, while the width of some plug holes 111 may be the same. For example, the width of the plug part 200 from one end close to the connection with the package body 100 to the middle thereof is gradually reduced, while the width from the middle of the plug part 200 to the free end thereof is the same; correspondingly, the plug hole 111 at the front end of the plug hole 111 along the arrangement direction (the part corresponding to the end of the plug part 200 close to the connection with the package body 100 after the plug part 200 and the fixing part 110 are assembled) is gradually reduced, while the plug hole 111 at the rear end of the plug hole 111 along the arrangement direction (the part corresponding to the free end of the plug part 200 after the plug part 200 and the fixing part 110 are assembled) is the same.

[0048] In addition, in some other embodiments of the present application, Figure 5 and Figure 6, multiple limiting sections 230 are provided on both sides of the plug-in portion 200. When the plug-in portion 200 passes through the plug-in holes 111 in sequence, the limiting sections 230 pass over the plug-in holes 111 and fit the fixing portion 110, and the multiple limiting sections 230 are staggered with the multiple plug-in holes 111 in the arrangement direction of the multiple plug-in holes 111. During the assembly process of the plug-in portion 200 and the fixing portion 110, the plug-in portion 200 is inserted into the plug-in hole 111. Since the limiting sections 230 can produce elastic deformation, they can follow the plug-in portion 200 to be inserted into the plug-in hole 111. When the plug-in portion 200 and the fixing portion 110 are assembled, the plug-in portion 200 passes through the multiple plug-in holes 111 in sequence, and the limiting sections 230 are staggered with the multiple plug-in holes 111. When the plug-in part 200 and the fixing part 110 are assembled, since the fixing part 110 and the plug-in part 200 are both in the unfolded state, the limiting section 230 is also in the unfolded state, so that the width of the part of the plug-in part 200 where the limiting section 230 is set is greater than the width of the plug-in hole 111, which can provide a limiting effect on the plug-in part 200 and prevent the plug-in part 200 from falling out.

[0049] Furthermore, in order to further improve the assembly stability of the plug-in portion 200 and the fixing portion 110, a through hole (not shown) is provided on the fixing portion 110, and the through hole is located between two adjacent plug-in holes 111, and the limiting section 230 passes through the fixing portion 110 from the through hole. After the plug-in portion 200 passes through the plurality of plug-in holes 111 in sequence, the limiting section 230 is arranged corresponding to the through hole, and the limiting section 230 can be inserted into the through hole, so that the limiting section 230 can be connected to the fixing portion 110, thereby improving the stability between the limiting section 230 and the fixing portion 110. It should be understood that in other embodiments, the setting of the through hole can also be cancelled.

[0050] In this example, please continue to refer to Figure 1 and Figure 2 , the package body 100 has at least two fixing parts 110, and the two fixing parts 110 are arranged in an overlapping manner; the plug holes 111 on the two fixing parts 110 correspond to each other, and the two corresponding plug holes 111 together form a through hole 112; the plug part 200 passes through the multiple through holes 112 in sequence. When the insulating film 10 is unfolded, the two fixing parts 110 are located at different positions of the package body 100. When the insulating film 10 is wrapped around the outside of the battery cell assembly 11, the two fixing parts 110 are overlapped, and then the plug part 200 passes through the multiple through holes 112 in sequence, so that the two fixing parts 110 can be connected, thereby ensuring the overall stability of the two fixing parts 110, thereby maintaining the insulating film 10 in a state of stably wrapping the battery cell assembly 11.

[0051] The battery cell assembly 11 has a top surface, a bottom surface, two first side surfaces opposite to each other along its length direction, and two second side surfaces opposite to each other along its thickness direction; the package body 100 also has a first fitting portion 120 and a second fitting portion 130. The first fitting portion 120 is wrapped around the outside of the bottom surface; the second fitting portion 130 is connected to one side of the first fitting portion 120 and wrapped around the outside of the second side surface. The fixing portion 110 is connected to one side of the second fitting portion 130 and wrapped around the outside of the first side surface; the plug-in portion 200 is connected to one side of the first fitting portion 120 adjacent to the second fitting portion 130. Specifically, the first fitting portion 120 is a quadrilateral, the second fitting portion 130 is arranged on one of the side edges of the first fitting portion 120, and the plug-in portion 200 is arranged on the adjacent side edge; based on this, when the first fitting portion 120 is wrapped around the outside of the bottom surface, the second fitting portion 130 can be bent relative to the first fitting portion 120 and wrapped around the outside of the second side surface, and when the plug-in portion 200 is bent relative to the first fitting portion 120, it can correspond to the first side surface, which can facilitate the cooperation between the plug-in portion 200 and the fixing portion 110.

[0052] It can be seen that the insulating film 10 is not wrapped on the top surface of the battery cell assembly 11. Compared with the prior art where the insulating film needs to be fixed on the top cover of the battery cell assembly 11, technical problems such as welding explosion points that are prone to occur during laser welding can be avoided.

[0053] In the process of wrapping the insulating film 10 on the outside of the battery cell assembly 11, the following steps can be adopted: firstly, the first bonding part 120 is bonded to the bottom surface, then the second bonding part 130 is flipped relative to the first bonding part 120 to be bonded to the second side surface, and then the fixing part 110 is flipped relative to the second bonding part 130 to be bonded to the first side surface; at this time, the two fixing parts 110 overlap each other, and the multiple plug holes 111 on the two plug parts 200 correspond to form multiple through holes 112. Finally, the plug parts 200 are inserted into the multiple through holes 112 in sequence to realize the connection and assembly between the plug parts 200 and the two fixing parts 110, and the insulating film 10 is wrapped on the outside of the battery cell assembly 11.

[0054] It should be noted that in other embodiments, the insulating film 10 may be wrapped around the outside of the battery cell assembly 11 in other ways. For example, the plug-in portion 200 and the fixing portion 110 of the insulating film 10 may be assembled first, so that the insulating film 10 forms a box shape with an opening, and then the battery cell assembly 11 may be installed into the insulating film 10 from the opening.

[0055] In this embodiment, there are two second fitting portions 130, which are respectively arranged on two opposite sides of the first fitting portion 120; there are two plug-in portions 200, which are respectively arranged on two opposite sides of the first fitting portion 120; any second fitting portion 130 is provided with fixing portions 110 on both sides along its length direction, and the fixing portions 110 located on both sides of the second fitting portion 130 are respectively wrapped around the outside of the two first side surfaces.

[0056] Optionally, the first fitting portion 120, the second fitting portion 130, the plug-in portion 200 and the fixing portion 110 are integrally formed.

[0057] In summary, in the battery provided in this embodiment, when the insulating film 10 wraps the battery cell assembly 11, the wrapping body 100 wraps the battery cell assembly 11, and then the plug-in portion 200 on the wrapping body 100 is inserted into the plug-in hole 111, so that the wrapping body 100 is fixed on the outer surface of the battery cell assembly 11; the plug-in portion 200 is inserted into the wrapping body 100 through the plug-in hole 111, which can provide a stabilizing effect for the wrapping body 100, and compared with the fixing method by gluing in the prior art, the manufacturing process can be reduced. Based on this, the insulating film 10 provided in this embodiment and the battery using the insulating film 10 can improve the technical problem of complex and high cost of battery cell manufacturing process in the prior art.

[0058] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An insulating film for wrapping a battery cell assembly, characterized in that: The insulating film comprises: A wrapping body, used to wrap the battery core assembly; the wrapping body has a fixing portion, and the fixing portion is provided with at least two plug holes; The plug-in part is connected to the wrapping body; wherein the plug-in part is configured as follows: after the wrapping body is wrapped around the outside of the battery cell assembly, the plug-in part passes through the plurality of plug-in holes in sequence to fix the wrapping body to the outer surface of the battery cell assembly.

2. The insulating film according to claim 1, wherein The plug-in portion includes a connecting section and a plug-in section, the connecting section is connected to the package body, the plug-in section is connected to the connecting section, and the plug-in section passes through a plurality of the plug-in holes in sequence; the width of the plug-in section is the same as the width of the plug-in hole.

3. The insulating film according to claim 1, wherein The width of the plugging holes gradually decreases along the arrangement direction thereof, and the width of the plugging parts gradually decreases; the plugging parts sequentially pass through the plugging holes from one side of the plugging holes with a wider width.

4. The insulating film according to claim 1, wherein A plurality of limiting sections are provided on both sides of the plug-in portion. When the plug-in portion passes through the plug-in holes in sequence, the limiting sections pass over the plug-in holes and fit the fixing portion, and the plurality of limiting sections are staggered with the plurality of plug-in holes in the arrangement direction of the plurality of plug-in holes.

5. The insulating film according to claim 4, characterized in that The fixing portion is provided with a through hole, the through hole is located between two adjacent plug holes, and the limiting section passes through the fixing portion from the through hole.

6. The insulating film according to any one of claims 1 to 5, characterized in that: The package body has at least two fixing parts, which are overlapped; the plug-in holes on the two fixing parts correspond to each other one by one, and the two corresponding plug-in holes together form a through hole; the plug-in part passes through multiple through holes in sequence.

7. The insulating film according to claim 6, characterized in that The battery core assembly has a top surface, a bottom surface, two first side surfaces opposite to each other along its length direction, and two second side surfaces opposite to each other along its thickness direction; the package body also has a first fitting portion and a second fitting portion; The first fitting portion is wrapped around the outside of the bottom surface; The second fitting portion is connected to one side of the first fitting portion and wrapped around the outside of the second side surface; The fixing portion is connected to one side of the second fitting portion and wrapped around the outside of the first side surface; the inserting portion is connected to one side of the first fitting portion adjacent to the second fitting portion.

8. The insulating film according to claim 7, wherein: There are two second fitting parts, and the two second fitting parts are respectively arranged on two opposite sides of the first fitting part; there are two plug-in parts, and the two plug-in parts are respectively arranged on two opposite sides of the first fitting part; any one of the second fitting parts is provided with the fixing parts on both sides along its length direction, and the fixing parts located on both sides of the second fitting part are respectively wrapped around the outside of the two first side faces.

9. The insulating film according to claim 7, wherein: The first fitting portion, the second fitting portion, the inserting portion and the fixing portion are integrally formed.

10. A battery, characterized in that: It comprises a battery cell assembly, a shell and an insulating film as described in any one of claims 1 to 9, wherein the insulating film is wrapped around the outside of the battery cell assembly, and the battery cell assembly is arranged inside the shell.

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