Batteries and electronic devices

Abstract

The present application relates to the field of battery technology, and provides a battery and an electronic device, wherein the battery comprises a shell and an outer envelope. The outer envelope wraps the outside of the shell wall of the shell, and the outer envelope has a defoaming portion on the side facing the shell. When the outer envelope and the shell are connected, the surface of the defoaming portion fits the shell. Through such a structural setting, the fit between the outer envelope and the shell is improved, bulging or wrinkling of the outer envelope is prevented, and the safety of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electronic device. Background Art

[0002] The battery shell is usually made of metal and is conductive. After the battery is assembled, an insulating outer film needs to be wrapped around the outer surface of the shell. The outer film and the battery shell need to fit tightly to effectively protect the battery shell.

[0003] However, the outer membrane is prone to bulging or wrinkling. Utility Model Content

[0004] The present application provides a battery and an electronic device, which can reduce bulging or wrinkling of the outer membrane of the battery and improve the safety of the battery.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a battery, comprising a shell and an outer envelope;

[0007] The outer envelope wraps the outer shell wall of the shell, and the outer envelope has a defoaming portion on one side facing the shell;

[0008] When the outer film is connected to the shell, the surface of the defoaming portion is in contact with the shell.

[0009] As a possible implementation manner, there are multiple defoaming parts, and the multiple defoaming parts are arranged in an array along the extension direction of the outer envelope.

[0010] As a possible implementation manner, along the first direction, adjacent defoaming portions are arranged in a staggered manner with respect to each other;

[0011] The first direction is parallel to the extension direction of the outer envelope.

[0012] As a possible implementation manner, the orthographic projection of the defoaming portion on the surface where the outer envelope is located is circular and / or elliptical;

[0013] And / or, the surface of the defoaming portion is a curved surface.

[0014] As a possible implementation manner, the outer envelope includes a base layer, a connecting layer, a bonding layer and a flexible layer stacked in sequence, a side of the flexible layer away from the bonding layer faces the shell, and the defoaming portion is located in the flexible layer;

[0015] The flexible layer is coated on the side of the bonding layer facing the shell, and when the flexible layer is bonded to the shell wall of the shell, the defoaming part is bonded to the shell.

[0016] As a possible implementation manner, part of the top corner of the shell is located in the defoaming portion.

[0017] As a possible implementation manner, the shell has a bottom wall and a plurality of side walls, the plurality of side walls are sequentially connected end to end, and one end of the side wall is connected to the bottom wall;

[0018] The outer envelope is attached to the bottom wall and the side wall of the shell.

[0019] As a possible embodiment, the outer membrane includes two first parts, the two first parts cover two of the multiple side walls extending along the length direction of the shell, the first part has extension parts on both sides along the length direction of the shell, and the two extension parts at the same end of the shell cover the side walls in the width direction of the shell and overlap each other.

[0020] As a possible implementation manner, along the width direction of the shell, the width of the overlapping portion of the two extensions is greater than or equal to 5 mm and less than or equal to the width of the shell.

[0021] As a possible implementation, the base layer is a polyethylene terephthalate layer or a polyimide layer, the connecting layer is a polyacrylate layer, the laminating layer is a polyimide layer, and the flexible layer is a silicone layer.

[0022] As a possible implementation manner, the thickness of the base layer is 25-35 μm; and / or,

[0023] The thickness of the connecting layer is 30-50 μm; and / or,

[0024] The thickness of the laminating layer is 25-35 μm; and / or,

[0025] The thickness of the flexible layer is 30-59 μm.

[0026] As a possible implementation manner, the peeling force between the adhesion layer and the flexible layer is greater than or equal to twice the peeling force between the flexible layer and the shell.

[0027] As a possible implementation manner, the projection size of the defoaming portion in the thickness direction of the outer film is 300-1200 μm; and / or,

[0028] The defoaming portion has a concave depth of 1-15 μm along the thickness direction of the outer film.

[0029] As a possible implementation manner, the spacing between adjacent defoaming portions along the extension direction of the outer envelope is 500-1000 μm.

[0030] The battery provided by the present application squeezes out the air between the outer film and the shell by squeezing the concave defoaming portion, so that the outer film and the shell fit tightly together. When the shell is deformed, the outer film will not bulge or wrinkle, thereby preventing the bulging or wrinkling position of the outer film from being damaged, thereby improving the safety of the battery.

[0031] In a second aspect, the present application provides an electronic device, comprising an electronic component and the battery described in the aforementioned embodiment, wherein the electronic component is electrically connected to the battery.

[0032] Since the electronic device provided in the present application includes the battery in the aforementioned embodiment, the safety of the electronic device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the present application;

[0035] Figure 2 A top view of the outer envelope in the battery provided by an embodiment of the present application;

[0036] Figure 3 A cross-sectional view of an outer envelope in a battery provided in an embodiment of the present application;

[0037] Figure 4 A schematic diagram of the connection between the shell and the outer envelope in the battery provided in the embodiment of the present application;

[0038] Figure 5 A schematic diagram of an outer envelope in a battery provided in an embodiment of the present application;

[0039] Figure 6 A schematic diagram of the projection of the outer envelope of the battery provided in an embodiment of the present application on the side wall of the shell.

[0040] Description of reference numerals:

[0041] 100-battery;

[0042] 110-housing; 111-top wall; 112-side wall;

[0043] 120 - outer film; 121 - defoaming part; 122 - base layer; 123 - connecting layer; 124 - laminating layer; 125 - flexible layer; 126 - second part; 127 - first part; 128 - extension part. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0045] The battery shell is usually made of metal and is conductive. After the battery is assembled, an insulating outer film needs to be wrapped around the outer surface of the shell. The outer film and the battery shell need to fit tightly to effectively protect the battery shell.

[0046] However, when the outer film is attached to the battery shell, the air cannot be discharged in time, which can easily cause the outer film to bulge or wrinkle. In addition, the battery will deform to a certain extent during charging or discharging, which will also cause bubbles to appear between the outer film and the battery shell, and the outer film is prone to bulging or wrinkling. During the long-term use of such a battery, the bulging or wrinkling of the outer film is prone to wear and rupture, which in turn reduces the safety of the battery.

[0047] In order to overcome the defects in the prior art, the present application provides a battery and an electronic device, wherein the battery includes a shell and an outer envelope. The outer envelope wraps the outer shell wall of the shell, and the outer envelope has a defoaming portion on the side facing the shell. The outer envelope wraps the shell wall of the shell, and pressure is applied to the outer envelope. The pressure acts on the outer envelope to make the surface of the defoaming portion fit with the shell, so that the air between the outer envelope and the shell can be squeezed out, the fit between the outer envelope and the shell is increased, and the outer envelope is prevented from bulging or wrinkling, thereby improving the safety of the battery.

[0048] The content of the utility model will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the content of the utility model more clearly and in detail.

[0049] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the present application. Figure 2 A top view of the outer envelope in the battery provided in an embodiment of the present application. Figure 3 A cross-sectional view of an outer envelope in a battery provided in an embodiment of the present application. Figure 4 A schematic diagram of the connection between the shell and the outer membrane in the battery provided in an embodiment of the present application. Figure 5 A schematic diagram of the outer envelope in a battery provided in an embodiment of the present application. Figure 6 A schematic diagram of the projection of the outer envelope of the battery provided in an embodiment of the present application on the side wall of the shell.

[0050] like Figure 1-Figure 6 As shown, this embodiment provides a battery 100 including a shell 110 and an outer envelope 120 .

[0051] The outer film 120 wraps the outer wall of the housing 110 , and a side of the outer film 120 facing the housing 110 has a defoaming portion 121 .

[0052] When the outer film 120 and the housing 110 are connected, the surface of the defoaming portion 121 is in contact with the housing 110 .

[0053] In this embodiment, the air between the outer film 120 and the shell 110 can be squeezed out by squeezing the uneven defoaming portion 121, so that the outer film 120 and the shell 110 are tightly fitted. Furthermore, when the shell 110 is deformed, the outer film 120 will not bulge or wrinkle, thereby preventing the bulging or wrinkling position of the outer film 120 from being damaged, thereby improving the safety of the battery 100.

[0054] In order to prevent the surface of the shell 110 from being scratched and the shell 110 from being oxidized and corroded due to long-term exposure to air, the protection performance of the shell 110 on the battery cell is reduced. In this embodiment, an outer film 120 is provided on the shell wall of the shell 110 .

[0055] Specifically, the outer film 120 wraps the shell wall of the shell 110. The outer film 120 is an insulating member, and the outer film 120 can completely wrap the shell 110. In this case, the connection between the shell 110 and the external electrical device needs to be further processed. Alternatively, the outer film 120 may include the outside of a portion of the shell wall of the shell 110, avoiding the connection between the shell 110 and the external electrical device.

[0056] The outer film 120 has a defoaming portion 121 on the side facing the shell 110. Exemplarily, the defoaming portion 121 is arranged concave-convex along the thickness direction of the outer film 120 from the side of the outer film 120 facing the shell 110 to the side away from the shell 110. When the outer film 120 is connected to the shell wall of the shell 110, the outer film 120 can be pressed or squeezed along the thickness direction of the outer film 120 to make the outer film 120 and the shell wall of the shell 110 fit. It can be understood that the surface of the defoaming portion 121 will fit the surface of the shell 110. In this process, the air between the outer film 120 and the shell 110 can be gradually squeezed out, reducing the air between the outer film 120 and the shell 110, preventing the outer film 120 from bulging or wrinkling, further protecting the shell 110, and improving the safety of the battery 100.

[0057] In some embodiments, there are multiple defoaming parts 121 , and the multiple defoaming parts 121 are arranged in an array along the extension direction of the outer packaging film 120 .

[0058] like Figure 2 As shown, there are multiple defoaming parts 121 in this embodiment, and the multiple defoaming parts 121 are arranged at intervals along the Y direction. The spaced defoaming parts 121 can gradually discharge the bubbles between the outer film 120 and the shell 110 from multiple positions, thereby preventing the outer film 120 from bulging and wrinkling, protecting the shell 110, and improving the safety of the battery 100.

[0059] It should be noted that the plurality of defoaming parts 121 may also be arranged at intervals along the X direction. This embodiment does not specifically limit this.

[0060] It can be understood that the multiple defoaming parts 121 in this embodiment are distributed in an array along the X direction and the Y direction. At this time, the X direction and the Y direction are the extension directions of the outer packaging film 120.

[0061] It can be understood that the adjacent defoaming parts 121 can be arranged at equal intervals or at unequal intervals. Among them, the defoaming parts 121 arranged at equal intervals are beneficial to the mold design during the production process of the outer packaging film 120. Such mold design is relatively simple and can reduce production costs and improve the production efficiency of the outer packaging film 120.

[0062] On the basis of the above-mentioned embodiment, adjacent defoaming portions 121 are arranged in a staggered manner along the first direction.

[0063] like Figure 2 As shown, in this embodiment, the plurality of defoaming parts 121 are arranged at intervals along the Y direction, and two adjacent defoaming parts 121 are staggered along the Y direction, or the plurality of defoaming parts 121 are arranged at intervals along the X direction, and two adjacent defoaming parts 121 are staggered along the X direction. In this way, the positions of adjacent defoaming parts 121 are relatively staggered.

[0064] In this way, the defoaming parts 121 staggered from each other in this embodiment can increase the effective area between the defoaming parts 121 and the housing 110. When the bubbles are squeezed, they are discharged from all angles and any direction and enter the adjacent defoaming parts 121. Then, the outer film 120 is gradually squeezed to make the outer film 120 fit the shell wall of the housing 110, so that the air in the defoaming parts 121 can be exhausted in turn, reducing the bulging and wrinkling of the outer film 120, and improving the safety of the battery 100.

[0065] It can be understood that the defoaming part 121 is arranged on the side opposite to the outer film 120 and the shell 110, and the defoaming part 121 is arranged concave-convex relative to the outer film 120 toward the side away from the shell 110, and the defoaming part 121 and the shell wall of the shell 110 together form a cavity, and the defoaming part 121 at this time can be a spherical structure or a polygonal cavity. The structure of the defoaming part 121 is diverse. In some embodiments, the orthographic projection of the defoaming part 121 on the surface where the outer film 120 is located is circular and / or elliptical; and / or, the surface of the defoaming part 121 is an arc surface.

[0066] like Figure 2 As shown, along the thickness direction (Z direction) of the outer film 120, the projection of the defoaming portion 121 is circular, and the cavity formed by the defoaming portion 121 can be a cylindrical cavity, or a spherical cavity, or a part of a spherical cavity. Such a defoaming portion 121 is easy to be formed by a mold, thereby improving the manufacturing efficiency of the outer film 120.

[0067] Of course, the orthographic projection of the defoaming portion 121 along the Z direction may also be an ellipse or other shapes.

[0068] Furthermore, the surface of the defoaming portion 121 in this embodiment is an arc-shaped surface. That is, the surface of the defoaming portion 121 relative to the concave and convex surface of the outer film 120 is an arc-shaped surface. Such an outer film 120 is not only easy to manufacture, but also, during the process of the outer film 120 and the shell 110 being attached, the defoaming portion 121 can be attached to the shell 110 as much as possible under the action of extrusion, so as to reduce the probability of bulging or wrinkling of the outer film 120, thereby extending the service life of the battery 100.

[0069] The outer envelope 120 in this embodiment includes a base layer 122, a connecting layer 123, a bonding layer 124 and a flexible layer 125 which are stacked in sequence. The side of the flexible layer 125 away from the bonding layer 124 faces the shell 110, and the defoaming portion 121 is arranged on the flexible layer 125; the flexible layer 125 is coated on the side of the bonding layer 124 facing the shell 110, and when the flexible layer 125 and the shell wall of the shell 110 are in contact, the defoaming portion 121 and the shell 110 are in contact.

[0070] It can be understood that the laminating layer 124 and the base layer 122 are relatively fixedly connected together through the connecting layer 123, and the laminating layer 124 and the shell 110 are connected through the flexible layer 125. During the laminating process of the outer film 120 and the shell 110, a certain pressure needs to be applied to the outer film 120 to ensure that the outer film 120 and the shell 110 are firmly connected. The setting of the connecting layer 123 can ensure the tensile performance of the outer film 120, and can also form a certain stress buffer to reduce the stress of the outer film 120 at the shell 110. The setting of the flexible layer 125 can improve the laminating degree of the outer film 120 and the shell 110.

[0071] In addition, the defoaming portion 121 in this embodiment is arranged on the side of the flexible layer 125 facing the housing 110. The defoaming portion 121 is recessed relative to the surface of the flexible layer 125. During the bonding process between the outer film 120 and the housing 110, with external extrusion, the flexible layer 125 can gradually squeeze out bubbles and other impurities, thereby improving the bonding between the outer film 120 and the housing 110, preventing the outer film 120 from bulging or wrinkling, and further improving the safety of the battery 100.

[0072] Specifically, the base layer 122 in this embodiment is a polyethylene terephthalate layer or a polyimide layer, the connecting layer 123 is a polyacrylate layer, the laminating layer 124 is a polyimide layer, and the flexible layer 125 is a silicone layer. In this way, the structural strength of the base layer 122 is greater than the strength of the laminating layer 124. After the outer film 120 and the shell 110 are laminated, the base layer 122 can play a protective role and slow down the damage of the outer film 120. In addition, the base layer 122 has good electrical insulation to further improve the safety of the battery 100.

[0073] The connection layer 123 and the bonding layer 124 are both insulating layers, which improve the insulation and safety of the battery 100. The flexible layer 125 is a silicone layer, which utilizes the viscosity and hydrophobicity of silicone to improve the fit between the housing 110 and protect the housing 110 during the extrusion process.

[0074] Exemplarily, the outer envelope 120 in this embodiment can be: polyethylene terephthalate layer-polyacrylate layer-polyimide layer-silicone layer, or polyimide layer-polyacrylate layer-polyimide layer-silicone layer. In this way, the base layer 122 is a polyethylene terephthalate layer or a polyimide layer, and the base layer 122 has good physical and mechanical properties, excellent electrical insulation, creep resistance, fatigue resistance, friction resistance and good dimensional stability. The connecting layer 123 is a polyacrylate layer, which has good adhesion. The laminating layer 124 is a polyimide layer, which can adjust the depth and width of the defoaming part 121 and the spacing between the defoaming parts 121, so as to achieve the degassing effect and adhesion of the outer envelope 120. The flexible layer 125 is a silicone layer. Due to the excellent deformation ability of the silicone itself, the bubbles can be effectively discharged after extrusion, and it is well adsorbed on the surface of the shell 110.

[0075] Further, the thickness of the base layer 122 is 25-35 μm; and / or the thickness of the connecting layer 123 is 30-50 μm; and / or the thickness of the laminating layer 124 is 25-35 μm; and / or the thickness of the flexible layer 125 is 30-59 μm.

[0076] Exemplarily, the combination of the thickness of each layer of the outer film 120 along the Z direction can be: the base layer 122 is 25μm, the connecting layer 123 is 30μm, the bonding layer 124 is 25μm, and the flexible layer 125 is 30μm; the base layer 122 is 25μm, the connecting layer 123 is 50μm, the bonding layer 124 is 25μm, and the flexible layer 125 is 59μm; the base layer 122 is 35μm, the connecting layer 123 is 30μm, the bonding layer 124 is 35μm, and the flexible layer 125 is 30μm, as well as other combinations. In the process of specific implementation, the thickness of each layer can be appropriately and reasonably selected according to actual needs to form different outer films 120.

[0077] In this embodiment, the peeling force between the bonding layer 124 and the flexible layer 125 is greater than or equal to twice the peeling force between the flexible layer 125 and the shell 110. In this way, it is ensured that the outer film 120 is bonded to the shell 110, and the outer film 120 and the shell 110 and the layers of the outer film 120 will not separate, thereby improving the stability of the battery 100 structure.

[0078] Through experiments, researchers have found that the peeling force between the bonding layer 124 and the flexible layer 125 of the outer film 120 of the battery 100 provided in this application is 30-50N / 25mm, and the peeling force between the flexible layer 125 and the shell 110 is 10-15N / 25mm. In addition, the tensile strength of the outer film 120 is greater than or equal to 120MPa. It has also been proved through experiments that such an outer film 120 and the shell 110 are very sticky after being connected and are not easy to fall off.

[0079] Based on the above-mentioned embodiment, the projection size of the defoaming portion 121 in the thickness direction of the outer film 120 ( Figure 2 D) is 300-1200 μm; and / or, the depression depth of the defoaming portion 121 along the thickness direction of the outer film 120 ( Figure 3 The h) indicated in the figure is 1-15 μm.

[0080] In a specific implementation, the radial dimension D of the projection of the defoaming portion 121 in the thickness direction of the outer film 120 is 300 μm, and the depression depth h of the defoaming portion 121 along the thickness direction of the outer film 120 is 1 μm; or, the radial dimension D of the projection of the defoaming portion 121 in the thickness direction of the outer film 120 is 300 μm, and the depression depth h of the defoaming portion 121 along the thickness direction of the outer film 120 is 15 μm; or again, the radial dimension D of the projection of the defoaming portion 121 in the thickness direction of the outer film 120 is 1200 μm, and the depression depth h of the defoaming portion 121 along the thickness direction of the outer film 120 is 15 μm, as well as other combinations. It can be understood that the radial dimension D of the projection of the defoaming portion 121 in the thickness direction of the outer film 120 is any value between 300 and 1200 μm, and the depression depth h of the defoaming portion 121 along the thickness direction of the outer film 120 is any value between 1 and 15 μm.

[0081] In this embodiment, the interval (W) between adjacent defoaming portions 121 along the first direction is 500-1000 μm.

[0082] like Figure 4 As shown, in some embodiments, part of the top corner of the shell 110 is located in the defoaming portion 121. In this way, the defoaming portion 121 can accommodate and wrap the top corner of the shell 110. At this time, the defoaming portion 121 provides a certain installation margin for the fitting of the outer film 120 and the top corner of the shell 110, which can prevent the top corner of the shell 110 from acting on the outer film 120, prevent the outer film 120 from being squeezed and deformed or punctured by the top corner of the shell 110, and prevent the outer film 120 from bulging or wrinkling at the top corner of the shell 110, thereby extending the service life of the outer film 120 and the service life of the battery 100.

[0083] Exemplarily, the housing 110 has a top wall 111, a bottom wall and a plurality of side walls 112, the top wall 111 and the bottom wall are arranged at intervals along the thickness direction of the outer film 120, the plurality of side walls 112 are connected end to end in sequence, and one end of the side wall 112 is connected to the edge of the top wall 111, and the other end is connected to the edge of the bottom wall; the outer film 120 is attached to the bottom wall and the side walls 112 of the housing 110. A connection terminal may be provided on the top wall 111, and the connection terminal is used to connect to an external electrical device.

[0084] In some embodiments, the outer membrane 120 includes two first parts 127, which cover two side walls 112 extending along the length direction of the shell 110 among the multiple side walls 112. The two first parts 127 have extension parts 128 on both sides along the length direction of the shell 110, and the two extension parts 128 at the same end of the shell 110 cover the side walls 112 in the width direction of the shell 110 and overlap with each other.

[0085] Combination Figure 1 , Figure 5 and Figure 6 As shown, the outer envelope 120 in this embodiment fits the bottom wall and the side wall 112 of the shell 110 , and the edge of the outer envelope 120 on the side close to the top of the shell 110 is flush with the edge of the top wall 111 of the shell 110 .

[0086] The outer membrane 120 has two first parts 127 and a second part 126. The bottom wall of the shell 110 overlaps with the second part 126. The length of the second part 126 along the length direction (Y direction) of the shell 110 is greater than the length of the shell 110. The second part 126 along the length direction (Y direction) of the shell 110 is located outside the edge of the bottom wall, is bent along the edge of the bottom wall toward the side wall 112 in the length direction of the shell 110, and is in contact with the side wall 112 in the length direction of the shell 110.

[0087] It can be understood that the two first parts 127 are arranged on both sides of the second part 126 along the width direction (X direction) of the shell 110, the two first parts 127 are in contact with the side walls 112 of the shell 110 in the width direction (X direction), and the two first parts 127 are respectively in contact with the two side walls 112 extending in the length direction of the shell 110, and the length dimension of the first part 127 along the length direction of the shell 110 is greater than the length of the shell 110, and this part of the area is the extension part 128, and the extension part 128 is bent along the edge of the side wall 112 in the length direction of the shell 110, and is in contact with the side wall 112 extending in the width direction (X direction) of the shell 110. In this way, the first part 127 and the second part 126 of the outer film 120 partially overlap on the side wall in the width direction of the shell 110, so as to prevent the side wall 112 of the shell 110 from contacting with the external environment, thereby improving the insulation of the shell 110 and the overall safety of the battery 100.

[0088] It should be noted that, in this embodiment, the length of the second portion 126 beyond the edge of one side of the bottom wall ( Figure 5 The length of the first portion 127 beyond the edge of the side wall 112 is 1 mm. Figure 5 The A) marked in the figure is 1 mm.

[0089] In some embodiments, along the width direction of the housing 110, the width of the overlapping portion of the two extensions 128 ( Figure 6 The L marked in FIG. 1 is greater than or equal to 5 mm and less than or equal to the width of the housing 110. In this embodiment, the two extensions 128 overlap on the sidewalls in the width direction of the housing 110, and the width of the overlapping portion along the width direction of the housing 110 is greater than or equal to 5 mm and less than or equal to the width of the housing 110.

[0090] The battery 100 provided in this embodiment also includes a battery cell, which can be a wound battery cell or a stacked battery cell. Of course, it can also be a battery cell with a multi-electrode structure. The shell 110 can be an aluminum shell 110, and the battery cell is encapsulated inside the shell 110. The pole ear of the battery cell is electrically connected to a shell wall of the shell 110 to connect to an external electrical device through the shell wall.

[0091] As described above, the battery 100 provided in this embodiment includes a shell 110 and an outer film 120. The outer film 120 wraps the outside of the shell wall of the shell 110, and the outer film 120 has a defoaming portion 121 on the side facing the shell 110; when the outer film 120 and the shell 110 are connected, the surface of the defoaming portion 121 is in contact with the shell 110. Through such a structural setting, the degree of contact between the outer film 120 and the shell 110 is improved, and the outer film 120 is prevented from bulging or wrinkling, thereby improving the safety of the battery 100.

[0092] In addition, an embodiment of the present application may also provide an electronic device, including an electronic component and the battery 100 in the aforementioned embodiment, wherein the electronic component and the battery 100 are electrically connected.

[0093] It should be noted that the electronic device in this embodiment may be a mobile phone, a laptop computer, an earphone, a tablet computer, etc., and is not limited to the above electronic devices.

[0094] Since the electronic device provided in this embodiment includes the battery in the aforementioned embodiment, the safety of the electronic device can be improved.

[0095] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0096] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0097] It should be easily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above something” or “over,” but also may include the meaning of “above something” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0098] In addition, spatially relative terms, such as "below," "below," "below," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90° or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery, characterized in that: including a shell and an outer envelope; The outer envelope wraps the outer shell wall of the shell, and the outer envelope has a defoaming portion on one side facing the shell; When the outer film is connected to the shell, the surface of the defoaming portion is in contact with the shell.

2. The battery according to claim 1, characterized in that There are multiple defoaming parts, and the multiple defoaming parts are arranged in an array along the extension direction of the outer envelope.

3. The battery according to claim 2, characterized in that Along the first direction, the adjacent defoaming parts are arranged in a staggered manner; The first direction is parallel to the extension direction of the outer envelope.

4. The battery according to any one of claims 1 to 3, characterized in that: The orthographic projection of the defoaming portion on the surface where the outer envelope is located is circular and / or elliptical; And / or, the surface of the defoaming portion is a curved surface.

5. The battery according to any one of claims 1 to 3, characterized in that: The outer envelope film comprises a base layer, a connecting layer, a bonding layer and a flexible layer which are stacked in sequence, the side of the flexible layer which is away from the bonding layer faces the shell, and the defoaming part is located in the flexible layer; The flexible layer is coated on the side of the bonding layer facing the shell, and when the flexible layer is bonded to the shell wall of the shell, the defoaming part is bonded to the shell.

6. The battery according to any one of claims 1 to 3, characterized in that: Part of the top corner of the shell is located in the defoaming part.

7. The battery according to any one of claims 1 to 3, characterized in that: The shell has a bottom wall and a plurality of side walls, the plurality of side walls are connected end to end in sequence, and one end of the side wall is connected to the bottom wall; The outer envelope is attached to the bottom wall and the side wall of the shell.

8. The battery according to claim 7, characterized in that The outer membrane includes two first parts, and the two first parts cover two of the multiple side walls extending along the length direction of the shell. The first part has extension parts on both sides along the length direction of the shell, and the two extension parts at the same end of the shell cover the side walls in the width direction of the shell and overlap each other.

9. The battery according to claim 8, characterized in that Along the width direction of the shell, the width of the overlapping portion of the two extensions is greater than or equal to 5 mm and less than or equal to the width of the shell.

10. The battery according to claim 5, characterized in that The base layer is a polyethylene terephthalate layer or a polyimide layer, the connecting layer is a polyacrylate layer, the laminating layer is a polyimide layer, and the flexible layer is a silicone layer.

11. The battery according to claim 10, characterized in that The thickness of the base layer is 25-35 μm; and / or, The thickness of the connecting layer is 30-50 μm; and / or, The thickness of the laminating layer is 25-35 μm; and / or, The thickness of the flexible layer is 30-59 μm.

12. The battery according to claim 5, characterized in that The peeling force between the adhesive layer and the flexible layer is greater than or equal to twice the peeling force between the flexible layer and the shell.

13. The battery according to claim 11, characterized in that The projection size of the defoaming portion in the thickness direction of the outer film is 300-1200 μm; and / or, The defoaming portion has a concave depth of 1-15 μm along the thickness direction of the outer film.

14. The battery according to claim 2 or 3, characterized in that: The distance between adjacent defoaming parts along the extending direction of the outer envelope is 500-1000 μm.

15. An electronic device, characterized in that: The invention comprises an electronic component and the battery according to any one of claims 1 to 14, wherein the electronic component is electrically connected to the battery.

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