Battery anti-piercing structure, battery cover assembly and terminal equipment

Abstract

The utility model discloses a battery anti-puncture structure, a battery cover assembly and terminal equipment, and belongs to the technical field of terminal equipment. The battery anti-puncture structure is arranged on the inner side face of the battery cover, the battery anti-puncture structure comprises a tough layer and a separation layer, the separation layer is arranged on the side, away from the battery cover, of the tough layer, and a first area right facing a battery is arranged on the inner side face of the battery cover; the tough layer is arranged in the first area, and the area of the partition layer extending out of the edge of the tough layer is connected to the battery cover. The total thickness of an original battery cover is not increased, the puncture resistance of the battery cover can be improved, the battery is prevented from being punctured by sharp objects, and the safety of the battery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of terminal equipment, and in particular to a battery anti-puncture structure, a battery cover assembly and a terminal equipment. Background Art

[0002] At present, in order to meet the requirements of thin and light design of electronic products, the thickness of battery covers of mobile phones and other devices is getting thinner and thinner. The thinning of battery covers is inevitably accompanied by a decrease in strength of the battery covers, which makes mobile phones and other electronic devices easily punctured when they fall and hit sharp objects. Sharp objects penetrate the battery cover and puncture the battery, causing the battery to burn, posing a threat to the personal safety of users. Utility Model Content

[0003] The present application provides an anti-puncture structure, a battery cover assembly and a terminal device, which are used to solve the potential safety hazard of sharp objects penetrating the battery cover and puncturing the battery due to the thin and light design of the battery cover in the terminal device.

[0004] The technical solution is as follows:

[0005] A first aspect of the present application provides a battery puncture prevention structure, which is arranged on the inner side of a battery cover, and includes: a strengthening layer and a separation layer, wherein the separation layer is arranged on the side of the strengthening layer away from the battery cover, and there is a first area on the inner side of the battery cover facing the battery, the strengthening layer is arranged in the first area, and the separation layer is connected to the battery cover in an area extending out of the edge of the strengthening layer.

[0006] The strong and tough layer has high toughness and is mainly used to improve the puncture resistance of the battery cover; the isolation layer can separate the strong and tough layer from the battery, reducing the risk of the internal structure of the battery contacting the strong and tough layer; in addition, the area extending from the edge of the strong and tough layer through the isolation layer is connected to the battery cover to facilitate the fixation of the strong and tough layer / isolation layer. By setting up the battery anti-puncture structure, the total thickness of the original battery cover is not increased, and the puncture resistance of the battery cover can be improved, preventing the battery from being punctured by sharp objects and improving battery safety.

[0007] In some implementations, the region of the isolation layer extending beyond the edge of the tough layer is adhesively connected to the battery cover, and an adhesive layer is disposed on at most one of two opposite side surfaces of the tough layer.

[0008] By providing an adhesive layer on at most one of the two opposite side surfaces of the tough layer, the number of adhesive layers is reduced and thickness space is saved.

[0009] In some implementations, the adhesive layer for connecting the isolation layer and the tough layer is provided between the two, an air layer is formed between the tough layer and the battery cover, or the adhesive layer for connecting the two is provided between the tough layer and the battery cover.

[0010] An adhesive layer is only provided between the separation layer and the tough layer or between the tough layer and the battery cover, and the number of adhesive layers is reduced to save thickness space on the basis of fixing the battery anti-puncture structure on the inner side of the battery cover. The air layer can not only save thickness space, but also buffer and prolong the time that sharp objects contact the battery during the falling process, thereby reducing the kinetic energy when the sharp objects contact the battery surface.

[0011] In some implementations, a accommodating limiting space is formed between the isolation layer and the battery cover, the strong and tough layer is disposed in the accommodating limiting space, and the position of the strong and tough layer on the battery cover is limited by the accommodating limiting space.

[0012] The sampling and accommodating space is limited by the strong and tough layer, and the two opposite sides of the strong and tough layer may not be provided with an adhesive layer, thereby reducing the number of adhesive layers and saving thickness space.

[0013] In some implementations, the thickness of the adhesive layer is in the range of 0.05-0.1 mm; the thickness of the adhesive between the separation layer and the battery cover is in the range of 0.05-0.1 mm.

[0014] Reasonably set the thickness of the adhesive layer to avoid too much thickness increasing the overall thickness and too little thickness affecting the bonding and fixing effect.

[0015] In some implementations, left and right ends of the separation layer along a first direction extend out of free ends of corresponding sides of the strengthening layer, respectively, and the first direction is a length direction or a width direction of the strengthening layer.

[0016] In some implementations, at least one of the two ends of the isolation layer along the second direction extends out of the free end of the corresponding side of the strengthening layer, or neither of the two ends of the isolation layer along the second direction extends out of the free end of the corresponding side of the strengthening layer, and the second direction is perpendicular to the first direction.

[0017] In some implementations, the length of a region of the separation layer extending beyond the edge of the tough layer along the extending direction is not less than 5 mm.

[0018] Avoid the area where the separation layer extends beyond the edge of the tough layer to be too small, which may affect the bonding and fixing effect.

[0019] In some implementations, the thickness of the isolation layer is in the range of 0.15-0.3 mm.

[0020] The thickness of the separation layer should be set reasonably to avoid it being too thick which increases the overall thickness, and too thin which affects the bonding and fixing effect as well as the buffering effect.

[0021] In some implementations, an insulating paint layer is provided on at least one side of the tough layer facing away from the battery cover.

[0022] The insulating paint layer on the surface of the tough layer serves to reduce the risk of the internal structure of the battery contacting the tough layer and has a flame retardant effect.

[0023] In some implementations, the tough layer is a metal plate.

[0024] The metal plate has high strength and toughness, thereby improving the puncture resistance of the battery cover.

[0025] In some implementations, the tough layer has a thickness ranging from 0.05 to 0.1 mm.

[0026] The thickness of the tough layer should be set appropriately to avoid making it too thick which will increase the overall thickness, and too thin which will affect the puncture resistance.

[0027] In some implementations, the separation layer is made of foamed plastic.

[0028] Since the foam plastic material has the characteristic of compressing energy absorption, it can play a role in buffering and absorbing energy when the mobile phone falls; in addition, sampling the foam plastic material with flame retardant effect can also achieve a flame retardant effect.

[0029] A second aspect of the present application provides a battery cover assembly, comprising a battery cover and a battery anti-puncture structure provided by any of the above-mentioned technical solutions, wherein the battery anti-puncture structure is arranged on the inner side surface of the battery cover, and there is a first area on the inner side surface of the battery cover facing the battery, and the tough layer covers part or all of the first area.

[0030] By providing a battery anti-puncture structure, the total thickness of the original battery cover is not increased, and the puncture resistance of the battery cover can be improved, thereby preventing the battery from being punctured by sharp objects and improving battery safety.

[0031] A third aspect of the present application provides a terminal device, comprising a battery cover assembly provided by the above technical solution.

[0032] Since the terminal device includes the above-mentioned battery cover assembly, it has at least all the beneficial effects of the battery cover assembly, without increasing the total thickness of the original battery cover, and can improve the puncture resistance of the battery cover, prevent the battery from being punctured by sharp objects, and improve battery safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a rear view schematic diagram of a mobile phone provided in an embodiment of the present application;

[0034] Figure 2 yes Figure 1 Sectional view at AA in the middle;

[0035] Figure 3 yes Figure 1 Sectional view at the middle BB;

[0036] Figure 4 is a schematic diagram of the inner side of a battery cover assembly provided in an embodiment of the present application;

[0037] Figure 5 yes Figure 4 Sectional view at CC;

[0038] Figure 6 is an exploded schematic diagram of a battery cover assembly provided in an embodiment of the present application;

[0039] Figure 7 is a schematic cross-sectional view of a battery puncture prevention structure (Example 1) provided in the present application;

[0040] Figure 8 1 is a longitudinal cross-sectional schematic diagram of a battery puncture prevention structure (Example 1) provided by the present application;

[0041] Fig. 9 is a schematic cross-sectional view of a battery puncture prevention structure (Example 2) provided by the present application;

[0042] Fig.10 1 is a longitudinal cross-sectional schematic diagram of a battery puncture prevention structure (Example 2) provided by the present application;

[0043] Fig.11 is a schematic cross-sectional view of a battery puncture prevention structure (Example 3) provided in the present application;

[0044] Fig.12 It is a longitudinal cross-sectional schematic diagram of the battery anti-puncture structure (Example 3) provided in the present application.

[0045] The meanings of the figures are as follows:

[0046] 1. Mobile phone;

[0047] 10. Battery cover; 20. Battery puncture prevention structure; 30. Battery;

[0048] 201. Strengthening layer; 202. Isolation layer; 203. Adhesive layer; 204. Insulating varnish; 205. Air layer. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, but cannot be understood as limiting the present application.

[0050] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "top", "bottom", "inside", "outside", "up", "down", "left", "right", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 on the present application.

[0051] In order to clearly describe the technical solution of the present application, the words "first", "second" and the like are used to distinguish the same or similar items with substantially the same functions and effects. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not necessarily limit the difference.

[0052] In this application, unless otherwise clearly specified and limited, the terms "connected", "connection" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0054] It should be noted that, in this application, words such as "in one embodiment", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in this application as "in one embodiment", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in one embodiment", "exemplarily", "for example", etc. is intended to present related concepts in a specific way.

[0055] The battery anti-puncture structure 20, battery cover assembly and terminal device provided in the embodiment of the present application are explained in detail below.

[0056] The terminal device includes but is not limited to a mobile phone, a tablet computer, a wearable device, a computer notebook, a personal digital assistant (PDA), and other terminal devices equipped with a battery cover assembly. In the embodiment of the present application, the terminal device is a mobile phone 1 as an example for description. Other types of terminal devices can be specifically set with reference to the design concept of the battery anti-puncture structure 20 in the mobile phone embodiment, which will not be described one by one here.

[0057] See also Figure 1-Figure 4 , Figure 1 This is a schematic diagram of the back of the phone. Figure 2 for Figure 1 AA section view, Figure 3 for Figure 1 BB section diagram, Figure 4 This is a schematic diagram of the inside of the battery cover assembly. Figure 5 for Figure 4 The battery puncture prevention structure 20 is disposed on a first area on the inner side of the battery cover 10 , wherein the first area is an area on the inner side of the battery cover 10 facing the battery 30 .

[0058] Regarding the first region, the area of ​​the first region is not less than the side area of ​​the battery, that is, when the battery cover 10 is projected toward the battery 30 along a direction perpendicular to the battery 30 , the first region may cover the battery 30 .

[0059] The battery anti-puncture structure 20 is arranged in the first area, and the battery anti-puncture structure 20 covers part or all of the first area. In order to better protect the battery 30, it is preferred that the battery anti-puncture structure 20 covers the entire first area, that is, when the battery anti-puncture structure 20 is projected toward the battery 30 in a direction perpendicular to the battery 30, the battery anti-puncture structure 20 can cover the battery 30. Of course, the battery anti-puncture structure 20 can cover part of the first area, and the battery anti-puncture structure 20 needs to face the central area of ​​the battery 30 to effectively protect the battery. With regard to the central area of ​​the battery 30, that is, when the battery is punctured in this area, the battery is most likely to burn.

[0060] At present, in order to meet the requirements of thin and light electronic product design, the thickness of the battery cover 10 of mobile phones is getting thinner and thinner. The thinning of the battery cover 10 is inevitably accompanied by a decrease in the strength of the battery cover 10, which makes it easy for mobile phones and other electronic devices to be punctured when they fall and hit sharp objects. The sharp object penetrates the battery cover 10 and punctures the battery, causing the battery to burn, posing a threat to the personal safety of users. By setting the battery anti-puncture structure 20, the total thickness of the original battery cover 10 is not increased, and the anti-puncture ability of the battery cover 10 can be improved, preventing the battery from being punctured by sharp objects, and improving battery safety.

[0061] See also Figure 6 , Figure 6 Schematic diagram of the explosion of the mobile phone battery cover assembly.

[0062] In this embodiment, the battery anti-puncture structure 20 includes a strengthening layer 201 and a separation layer 202. The separation layer 202 is arranged on the side of the strengthening layer 201 away from the battery cover 10. There is a first area facing the battery on the inner side of the battery cover 10. The strengthening layer 201 is arranged in the first area and the separation layer 202 extends out of the edge of the strengthening layer 201 and is connected to the battery cover 10.

[0063] The tough layer 201 has high toughness and is mainly used to improve the puncture resistance of the battery cover 10; the separation layer 202 can separate the tough layer 201 from the battery, reducing the risk of the internal structure of the battery contacting the tough layer 201; in addition, the area of ​​the separation layer 202 extending from the edge of the tough layer 201 is connected to the battery cover 10 to facilitate the fixation of the tough layer 201 / separation layer 202. By setting the battery anti-puncture structure 20, the total thickness of the original battery cover 10 is not increased, and the puncture resistance of the battery cover 10 can be improved, preventing the battery from being punctured by sharp objects, and improving battery safety.

[0064] Regarding the position of the tough layer 201 on the first area, the tough layer 201 is facing the first area, and the tough layer 201 covers part or all of the first area. In order to better protect the battery 30, it is preferred that the tough layer 201 covers the entire first area, that is, the tough layer 201 is projected toward the battery in a direction perpendicular to the battery 30, and the tough layer 201 can cover the battery 30. Of course, the tough layer 201 can cover part of the first area. At this time, the tough layer 201 needs to face the central area of ​​the battery to effectively protect the battery.

[0065] The isolation layer 202 is arranged on the side of the strengthening layer 201 away from the battery cover 10, that is, the strengthening layer 201 has a first plate surface and a second plate surface arranged opposite to each other, the first plate surface is closer to the inner side surface of the battery cover 10 relative to the second plate surface, the first plate surface is parallel or approximately parallel to the inner side surface of the battery cover 10, and the isolation layer 202 is arranged on the second plate surface side of the strengthening layer 201.

[0066] In this embodiment, the isolation layer 202 is provided with an area extending out from the edge of the strengthening layer 201, and the area of ​​the isolation layer 202 extending out from the edge of the strengthening layer 201 is connected to the battery cover 10, that is, the area of ​​the isolation layer 202 extending out from the edge of the strengthening layer 201 is fixed to the battery cover 10. Through this structural design, the fixing method of the strengthening layer 201 can be enriched, for example, the isolation layer 202 can be fixed on the isolation layer 202.

[0067] In some embodiments, the area where the isolation layer 202 extends out of the edge of the tough layer 201 is bonded to the battery cover 10, and an adhesive layer is provided on at most one of the two opposite sides of the tough layer 201. Adhesive connection is a commonly used connection method, and is the preferred connection method under the premise of saving thickness and space.

[0068] An adhesive layer is provided on at most one of the two opposite side surfaces of the strengthening layer 201, that is, an adhesive layer is provided on one of the side surfaces of the strengthening layer 201 (an adhesive layer is provided on the first plate surface or the second plate surface), or, no adhesive layer is provided on the two opposite side surfaces of the strengthening layer 201 (no adhesive layer is provided on the first plate surface and the second plate surface. In this way, compared with the case where an adhesive layer is provided between the strengthening layer 201 and the battery cover 10 and an adhesive layer is provided between the strengthening layer 201 and the isolation layer 202, an adhesive layer is provided on at most one of the two opposite side surfaces of the sampling strengthening layer 201, which can reduce at least one layer of the glue layer 203, thereby minimizing the thickness of the battery anti-puncture structure 20, saving thickness space.

[0069] By arranging the isolation layer 202 to extend out of the edge of the tough layer 201 and connect it to the battery cover 10, it is possible to fix the battery anti-puncture structure 20 on the battery cover 10 when at most one of the two opposite side surfaces of the tough layer 201 is provided with an adhesive layer.

[0070] See also Figure 7 and Figure 8 , which is an embodiment (embodiment 1) of the present application in which the tough layer 201 and the isolation layer 202 are connected to the battery cover 10. Figure 7 It is a cross-sectional schematic diagram of the battery anti-puncture structure. Figure 8 is a schematic cross-sectional view of the battery anti-puncture structure in the longitudinal direction. Figure 1 The AA direction of mobile phone 1 is as follows: Figure 1 BB direction of mobile phone 1.

[0071] In this embodiment, an adhesive layer for connecting the isolation layer 202 and the tough layer 201 is provided between the isolation layer 202 and the tough layer 201, that is, a glue layer 203 is provided on the side of the isolation layer 202 facing the tough layer 201, the area of ​​the isolation layer 202 facing the tough layer 201 is connected to the tough layer 201 through the glue layer 203, and the area of ​​the isolation layer 202 extending out of the edge of the tough layer 201 is adhered to the battery cover 10 through the glue layer 203.

[0072] During assembly, the tough layer 201 is first placed on the inner side of the battery cover 10 facing the center of the battery, and then the spacer layer 202 with the adhesive layer 203 is used to cover the tough layer 201 and adhere to the battery cover 10 .

[0073] Since the area where the partition layer 202 extends out of the edge of the tough layer 201 is directly bonded to the battery cover 10, the thickness of the battery anti-puncture structure 20 is greater where the tough layer 201 is provided, and is smaller where the tough layer 201 is not provided (the area where the partition layer 202 extends out of the edge of the tough layer 201). Therefore, only a bonding layer is provided between the partition layer 202 and the tough layer 201 to connect the two, and no bonding layer is provided between the tough layer 201 and the battery cover 10, which can reduce the overall thickness of the battery anti-puncture structure 20 and save thickness space.

[0074] The strong and tough layer 201 has high toughness and improves the puncture resistance; in addition, there is no adhesive layer between the strong and tough layer 201 and the battery cover 10 to form an air layer 205, which can not only save the thickness of a layer of adhesive layer, but also between the strong and tough layer 201 and the battery cover 10, when the impact stress wave passes through the battery cover 10 to the strong and tough layer 201, in addition to the stress wave advancing in the original direction, a reflected wave will also be formed, part of the reflected wave returns along the original direction, and another part will travel between the two layers of interface. That is, if the strong and tough layer 201 and the battery cover 10 are too well bonded, the stress wave will travel unhindered, and no adhesive layer is set between the strong and tough layer 201 and the battery cover 10, so that the stress wave changes direction after passing through the battery cover 10 and allows the strong and tough layer 201 and the battery cover 10 to have a larger deformation space in the thickness direction of the mobile phone 1, thereby dissipating part of the energy.

[0075] In addition to fixing the strong layer 201, the isolation layer 202 with the adhesive layer 203 can also act as a buffer when the mobile phone falls; at the same time, the isolation layer 202 with the adhesive layer 203 can separate the strong layer 201 from the battery, thereby reducing the risk of the internal structure of the battery contacting the strong layer 201.

[0076] Regarding the above-mentioned air layer 205, since there is no adhesive layer between the strengthening layer 201 and the battery cover 10, the strengthening layer 201 is fixed on the battery cover 10 through the isolation layer 202, and the side of the strengthening layer 201 facing the battery cover 10 is not connected to the battery cover 10, there will be air between the two, that is, the air layer 205 between the strengthening layer 201 and the battery cover 10.

[0077] See also Fig. 9 and Fig.10 , which is an embodiment (embodiment 2) of the present application in which the tough layer 201 and the isolation layer 202 are connected to the battery cover 10. Fig. 9 It is a cross-sectional schematic diagram of the battery anti-puncture structure. Fig.10 is a schematic cross-sectional view of the battery anti-puncture structure in the longitudinal direction. Figure 1 The AA direction of mobile phone 1 is as follows: Figure 1 BB direction of mobile phone 1.

[0078] In this embodiment, an adhesive layer for connecting the strong and tough layer 201 and the battery cover 10 is provided between the two. That is, a glue layer 203 is provided on the side of the strong and tough layer 201 facing the battery cover 10 (forming an adhesive layer between the battery cover 10 and the strong and tough layer 201), and no adhesive layer is provided in the area of ​​the separation layer 202 facing the strong and tough layer 201, and the area of ​​the separation layer 202 extending out of the edge of the strong and tough layer 201 is adhered to the battery cover 10 through the glue layer 203.

[0079] During assembly, the tough layer 201 is first placed on the inner side of the battery cover 10, facing the center of the battery, and the tough layer 201 is pasted on the inner side of the battery cover 10. Then, the spacer layer 202 with the adhesive layer 203 is used to cover the tough layer 201 and adhere it to the battery cover 10. The spacer layer 202 is provided with the adhesive layer 203 in the area where the spacer layer 202 extends out of the edge of the tough layer 201. In addition, the spacer layer 202 is usually provided with an opening, see Figure 4 , to facilitate exhaust during pasting.

[0080] Since the area where the separation layer 202 extends out of the edge of the tough layer 201 is directly bonded to the battery cover 10, the thickness of the battery anti-puncture structure 20 is greater where the tough layer 201 is provided, and is smaller where the tough layer 201 is not provided (the area where the separation layer 202 extends out of the edge of the tough layer 201). Therefore, only a bonding layer is provided between the tough layer 201 and the battery cover 10 to connect the two, and no bonding layer is provided between the tough layer 201 and the separation layer 202, so that the overall thickness of the battery anti-puncture structure 20 can be reduced, saving thickness space.

[0081] The strong layer 201 has high toughness and improves the puncture resistance; the isolation layer 202 can play a buffering role when the mobile phone falls; at the same time, the isolation layer 202 can separate the strong layer 201 from the battery, thereby reducing the risk of the internal structure of the battery contacting the strong layer 201.

[0082] See also Fig.11 and Fig.12 , which is an embodiment (embodiment three) of the present application in which the tough layer 201 and the isolation layer 202 are connected to the battery cover 10. Fig.11 It is a cross-sectional schematic diagram of the battery anti-puncture structure. Fig.12 is a schematic cross-sectional view of the battery anti-puncture structure in the longitudinal direction. Figure 1 The AA direction of mobile phone 1 is as follows: Figure 1 BB direction of mobile phone 1.

[0083] In this embodiment, a accommodating limiting space is formed between the separation layer 202 and the battery cover 10, and the tough layer 201 is arranged in the accommodating limiting space, that is, the tough layer 201 is limited on the inner side of the battery cover 10 by the separation layer 202, and the area of ​​the separation layer 202 facing the tough layer 201 is not provided with an adhesive layer, and the area of ​​the separation layer 202 extending out of the edge of the tough layer 201 is adhered to the battery cover 10 through the adhesive layer 203. The area of ​​the separation layer 202 extending out of the edge of the tough layer 201 is adhered to the battery cover 10 through the adhesive layer 203, so as to limit the position of the tough layer 201 on the battery cover 10.

[0084] Since the area where the isolation layer 202 extends out of the edge of the tough layer 201 is directly bonded to the battery cover 10, and no bonding layer is provided on the two opposite sides of the tough layer 201, the overall thickness of the battery anti-puncture structure 20 can be reduced, saving thickness space.

[0085] The tough layer 201 has high toughness and improves the puncture resistance. In addition, there is no glue layer 203 between the tough layer 201 and the battery cover 10 to form an air layer 205, which can not only save thickness space, but also buffer and prolong the time that sharp objects contact the battery during the falling process, thereby reducing the kinetic energy of the sharp object when it contacts the battery surface.

[0086] In addition to fixing the strong layer 201, the isolation layer 202 with the adhesive layer 203 can also act as a buffer when the mobile phone falls; at the same time, the isolation layer 202 with the adhesive layer 203 can separate the strong layer 201 from the battery, thereby reducing the risk of the internal structure of the battery contacting the strong layer 201.

[0087] Regarding the above-mentioned air layer 205, since there is no glue layer 203 between the strengthening layer 201 and the battery cover 10, the strengthening layer 201 is fixed on the battery cover 10 through the isolation layer 202, and the strengthening layer 201 is not connected to the battery cover 10 on the side facing the battery cover 10, there will be air between the two, that is, the air layer 205 between the strengthening layer 201 and the battery cover 10.

[0088] Regarding the “area where the separation layer 202 extends out from the edge of the tough layer 201”, the specific structure is as follows:

[0089] For example, in the embodiment of "an adhesive layer is provided between the isolation layer 202 and the tough layer 201 for connecting the two, or an adhesive layer is provided between the tough layer 201 and the battery cover 10 for connecting the two", the left and right ends of the isolation layer 202 along the first direction extend out from the free ends of the corresponding sides of the tough layer 201 respectively, and the first direction is the length direction or the width direction of the tough layer 201.

[0090] Regarding the shape of the tough layer 201, the shape of the tough layer 201 is consistent with the shape of the battery 30, preferably a rectangular shape. Of course, the shape of the tough layer 201 is not limited to a rectangular shape, and can also be set to other polygonal shapes as long as the anti-puncture function of the battery is achieved.

[0091] The shape of the separation layer 202 is preferably rectangular. Of course, the shape of the tough layer 201 is not limited to being rectangular, and may also be other polygonal shapes, as long as the separation layer 202 can be fixed on the battery cover 10 when the area extending from the edge of the tough layer 201 is pasted on the battery cover 10.

[0092] Regarding the "corresponding side of the tough layer 201", when the tough layer 201 and the separation layer 202 are both rectangular, the left edge of the tough layer 201 is the corresponding side of the left edge of the separation layer 202, the right edge of the tough layer 201 is the corresponding side of the right edge of the separation layer 202, the upper edge of the tough layer 201 is the corresponding side of the upper edge of the separation layer 202, and the lower edge of the tough layer 201 is the corresponding side of the lower edge of the separation layer 202. For the left, right, up and down directions, please refer to Figure 1 , the two sides along the X direction are respectively the left and right sides, and the two sides along the Y direction are respectively the upper and lower sides.

[0093] When the tough layer 201 is rectangular, the left and right ends of the spacer layer 202 along the width direction of the tough layer 201 preferably extend out of the free ends of the corresponding sides of the tough layer 201. Figure 7 and Fig. 9 , schematically showing the free ends of the isolation layer 202 extending out from the corresponding sides of the tough layer 201 at the left and right ends along the width direction of the tough layer 201 .

[0094] See also Figure 7 and Fig. 9 , the length d of the area where the separation layer 202 extends out of the edge of the tough layer 201 along the first direction is not less than 5 mm. Avoid the area where the separation layer 202 extends out of the edge of the tough layer 201 is too small to affect the bonding and fixing effect. Of course, the length d of the area where the separation layer 202 extends out of the edge of the tough layer 201 along the first direction cannot be too long, which will increase costs and waste materials.

[0095] At least one of the two ends of the isolation layer 202 along the second direction extends out of the free end of the corresponding side of the tough layer 201, or both ends of the isolation layer 202 along the second direction do not extend out of the free end of the corresponding side of the tough layer 201, and the second direction is perpendicular to the first direction. That is, when the first direction is the width direction of the tough layer 201, the second direction is the length direction of the tough layer 201. It can be set that both ends of the isolation layer 202 along the second direction do not extend out of the free end of the corresponding side of the tough layer 201, for example, the two ends of the isolation layer 202 along the second direction are respectively flush with the free ends of the corresponding side of the tough layer 201. Or, see Figure 8 and Fig.10 , the two ends of the separation layer 202 along the second direction can be arranged to extend out of the free ends of the corresponding sides of the tough layer 201 respectively.

[0096] When both ends of the separation layer 202 in the second direction extend out of the free ends of the corresponding sides of the tough layer 201, the length L of the area where the separation layer 202 extends out of the edge of the tough layer 201 in the second direction is not less than 5 mm. Avoid the area where the separation layer 202 extends out of the edge of the tough layer 201 is too small to affect the bonding and fixing effect. Of course, the length L of the area where the separation layer 202 extends out of the edge of the tough layer 201 in the second direction cannot be too long, which will increase costs and waste materials.

[0097] For example, in the embodiment of "an accommodation space is formed between the isolation layer 202 and the battery cover 10, and the tough layer 201 is arranged in the accommodation space", the left and right ends of the isolation layer 202 along the first direction are required to extend out of the free ends of the corresponding sides of the tough layer 201, and the two ends of the isolation layer 202 along the second direction are required to extend out of the free ends of the corresponding sides of the tough layer 201, see Fig.11 and Fig.12 .

[0098] The shape of the separating layer 202 is rectangular. The shape of the separating layer 202 can be rectangular, or the shape of the separating layer 202 can be in the shape of a "cross". An accommodating limit space is formed between the unbonded portion of the separating layer 202 and the battery cover 10 and the battery cover 10. The length d of the area where the separating layer 202 extends out of the edge of the strong and tough layer 201 along the first direction is not less than 5 mm, and the length L of the area where the separating layer 202 extends out of the edge of the strong and tough layer 201 along the second direction is not less than 5 mm. Avoid the area where the separating layer 202 extends out of the edge of the strong and tough layer 201 is too small to affect the bonding and fixing effect. Of course, the length d of the area where the separating layer 202 extends out of the edge of the strong and tough layer 201 along the first direction and the length L of the area where the separating layer 202 extends out of the edge of the strong and tough layer 201 along the second direction cannot be too long, otherwise it will lead to increased costs and waste of materials.

[0099] In some embodiments, the thickness of the isolation layer 202 ranges from 0.15 to 0.3 mm. The thickness of the isolation layer 202 is appropriately set to avoid increasing the overall thickness when it is too thick, or affecting the bonding and fixing effect and the buffering effect when it is too thin.

[0100] In some embodiments, the thickness of the tough layer 201 ranges from 0.05 to 0.1 mm. The thickness of the tough layer 201 is appropriately set to avoid increasing the overall thickness by being too thick or affecting the anti-puncture ability by being too thin.

[0101] In some embodiments, the thickness of the adhesive layer is in the range of 0.05-0.1 mm; the thickness of the adhesive between the separation layer 202 and the battery cover 10 is in the range of 0.05-0.1 mm. The thickness of the adhesive layer (glue layer 203) is reasonably set to avoid being too thick to increase the overall thickness and too thin to affect the bonding effect.

[0102] In some embodiments, the tough layer 201 is a metal plate. The metal plate has high toughness, thereby improving the puncture resistance of the battery cover 10. The tough layer 201 can be a steel sheet, or a metal sheet of other materials, such as a copper sheet, etc. In addition, the puncture-resistant metal sheet can be heat-treated in advance to obtain a specific organizational structure to meet the high puncture resistance requirements. Of course, the material of the tough layer 201 is not limited to only a metal plate, but can also be other non-metal plates with high strength.

[0103] In some embodiments, the adhesive material on the separation layer 202 is adhesive. Adhesive is a polymer adhesive material, which is usually pre-coated on the back of the product. The characteristics of adhesive include high bonding strength, good flexibility, and resistance to climate change and slight vibration, so that the materials can be firmly bonded together for a long time.

[0104] In some embodiments, an insulating paint layer 204 is disposed on a side of the tough layer 201 facing away from the battery cover 10 .

[0105] In some embodiments, an insulating paint layer 204 is disposed on both the side of the tough layer 201 facing away from the battery cover 10 and the side close to the battery cover 10 .

[0106] Insulating varnish, also known as insulating coating, is a coating with excellent electrical insulation. It has good electrochemical, thermal, mechanical and chemical properties. Insulating varnish is an important insulating material based on high molecular polymers that can be cured into an insulating film or an insulating whole under certain conditions. Insulating varnish is composed of a base material, a flame retardant, a curing agent, a pigment, a filler and a solvent. An insulating varnish layer 204 is provided on the tough layer 201 to reduce the risk of the internal structure of the battery contacting the tough layer 201 and improve the flame retardant effect.

[0107] Regarding the isolation layer 202, in some implementations, the isolation layer 202 is a one-layer structure, that is, the isolation layer 202 is a single-layer structure; or, in other implementations, the isolation layer 202 is a two-layer or more structure, and the layers of the isolation layer 202 are sequentially arranged along the thickness direction of the isolation layer 202. When the isolation layer 202 is a two-layer or more structure, it is preferred that the materials of the layers are different, and different materials can achieve different functions. By setting the materials of the layers to be different, the isolation layer 202 has more functions.

[0108] In some implementations, the material of the separation layer 202 is a foamed plastic material. Since the foamed plastic material has the characteristic of compressing and absorbing energy, it can play a role in buffering and absorbing energy when the mobile phone falls. For example, the material of the separation layer 202 can be foam. Foam is a material made of foamed plastic particles. Foam has a series of characteristics such as elasticity, light weight, fast pressure-sensitive fixation, easy use, easy bending, ultra-thin volume, and reliable performance.

[0109] In addition to the compression energy absorption property, the material of the separation layer 202 can also be selected to have a flame retardant property, which can have a flame retardant effect on the combustion of the battery and improve safety.

[0110] In summary, the battery anti-puncture structure, battery cover assembly and terminal device provided in the present application do not increase the total thickness of the original battery cover 10, but can improve the puncture resistance of the battery cover 10, prevent the battery from being punctured by sharp objects, and improve battery safety. The strengthening layer 201 has high toughness and is mainly used to improve the puncture resistance of the battery cover 10; there is no glue bonding between the strengthening layer 201 and the battery cover 10, but an air layer 205 is formed, which can not only save thickness space, but also buffer and prolong the time that sharp objects contact the battery during the falling process, thereby reducing the kinetic energy of the sharp objects when they contact the battery surface; in addition to fixing the strengthening layer 201, the glue layer 203 and the isolation layer 202 can also buffer new energy during the falling process of the mobile phone; at the same time, the isolation layer 202 can separate the strong layer 201 from the battery, and together with the insulating paint layer 204 on the surface of the strong layer 201, it can reduce the risk of the internal structure of the battery contacting the steel sheet; in addition, the area of ​​the isolation layer 202 extending out of the edge of the strong layer 201 is connected to the battery cover 10, which can facilitate the fixation of the strong layer 201 / isolation layer 202.

[0111] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery puncture prevention structure, arranged on the inner side of a battery cover, characterized in that: include: A strengthening layer and a separation layer, wherein the separation layer is arranged on the side of the strengthening layer away from the battery cover, and there is a first area facing the battery on the inner side of the battery cover, the strengthening layer is arranged in the first area, and the separation layer is connected to the battery cover in an area extending out of the edge of the strengthening layer.

2. The battery puncture-proof structure according to claim 1, characterized in that: The region of the separation layer extending out of the edge of the tough layer is bonded to the battery cover, and an adhesive layer is provided on at most one of the two opposite side surfaces of the tough layer.

3. The battery puncture-proof structure according to claim 2, characterized in that: The adhesive layer for connecting the isolation layer and the tough layer is provided between the isolation layer and the tough layer, and an air layer is formed between the tough layer and the battery cover; or the adhesive layer for connecting the tough layer and the battery cover is provided between the tough layer and the battery cover; Alternatively, a accommodating limiting space is formed between the isolation layer and the battery cover, the strong and tough layer is arranged in the accommodating limiting space, and the position of the strong and tough layer on the battery cover is limited by the accommodating limiting space.

4. The battery puncture-proof structure according to claim 2, characterized in that: The thickness of the adhesive layer is in the range of 0.05-0.1 mm; the thickness of the adhesive between the separation layer and the battery cover is in the range of 0.05-0.1 mm.

5. The battery puncture-proof structure according to claim 1, characterized in that: The left and right ends of the separation layer along the first direction extend out of the free ends of the corresponding sides of the tough layer respectively, and the first direction is the length direction or the width direction of the tough layer.

6. The battery puncture-proof structure according to claim 5, characterized in that: At least one of the two ends of the separation layer along the second direction extends out of the free end of the corresponding side of the tough layer, or both ends of the separation layer along the second direction do not extend out of the free end of the corresponding side of the tough layer, and the second direction is perpendicular to the first direction.

7. The battery puncture-proof structure according to claim 6, characterized in that: The length of the region where the separation layer extends out of the edge of the tough layer along the extending direction is not less than 5 mm.

8. The battery puncture-proof structure according to any one of claims 1 to 7, characterized in that: The thickness of the isolation layer is in the range of 0.15-0.3 mm.

9. The battery puncture-proof structure according to any one of claims 1 to 7, characterized in that: At least one side of the tough layer facing away from the battery cover is provided with an insulating paint layer.

10. The battery puncture-proof structure according to any one of claims 1 to 7, characterized in that: The tough layer is a metal plate.

11. The battery puncture-proof structure according to any one of claims 1 to 7, characterized in that: The thickness of the tough layer is in the range of 0.05-0.1 mm.

12. The battery puncture-proof structure according to any one of claims 1 to 7, characterized in that: The material of the separation layer is foamed plastic.

13. A battery cover assembly, characterized in that: It comprises a battery cover and a battery anti-puncture structure according to any one of claims 1 to 12, wherein the battery anti-puncture structure is arranged on the inner side of the battery cover, there is a first area facing the battery on the inner side of the battery cover, and the battery anti-puncture structure covers part or all of the first area.

14. A terminal device, characterized in that: The battery cover assembly comprises the battery cover assembly as claimed in claim 13.

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