Battery and electronic equipment

Abstract

The utility model discloses a battery and electronic equipment, and the battery comprises a shell which is provided with a storage cavity; the battery cell is arranged in the storage cavity, the battery cell comprises a diaphragm and a pole piece, the diaphragm is connected to the pole piece, the pole piece is provided with a first corner, the diaphragm is provided with a second corner, the second corner protrudes relative to the first corner, and a gap is formed between the pole piece and the cavity wall of the storage cavity; the cover plate comprises a body part and a protruding part, the protruding part is connected to the body part and protrudes relative to the body part, the body part is connected to the shell, the protruding part abuts against the second corner, and the protruding part and the second corner are jointly arranged in the gap. According to the battery disclosed by the utility model, when the cover plate and the shell are welded, the condition of insufficient welding can be effectively avoided.

Description

Technical Field

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

[0002] In the related art, the battery includes a cover plate, a shell and a battery cell. The battery cell includes a positive electrode sheet, a negative electrode sheet and a diaphragm. The diaphragm is located between the positive electrode sheet and the negative electrode sheet. In order to effectively prevent direct contact between the positive electrode sheet and the negative electrode sheet, the width and length of the diaphragm are both greater than the width and length of the electrode sheet. The battery cell is placed in the storage cavity of the shell, and the cover plate and the shell are welded to close the opening of the storage cavity. After the battery cell is placed in the storage cavity, the diaphragm at the corners of the battery cell will protrude out of the storage cavity. After the diaphragm is located between the cover plate and the shell, this will cause a cold weld when the shell and the cover plate are welded. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a battery that can effectively avoid the occurrence of cold welding when welding a cover plate and a shell.

[0004] The utility model also provides an electronic device.

[0005] A battery according to an embodiment of the first aspect of the present invention includes:

[0006] a housing having a storage cavity;

[0007] A battery cell is disposed in the storage cavity, the battery cell comprising a diaphragm and a pole piece, the diaphragm is connected to the pole piece, the pole piece has a first corner, the diaphragm has a second corner, the second corner protrudes relative to the first corner, and a gap is formed between the pole piece and the cavity wall of the storage cavity;

[0008] The cover plate includes a main body and a protruding portion, wherein the protruding portion is connected to the main body and protrudes relative to the main body, the main body is connected to the shell, the protruding portion abuts against the second corner, and the protruding portion and the second corner are jointly arranged in the gap.

[0009] The battery according to the embodiment of the present invention has at least the following beneficial effects: the battery cell includes a diaphragm and a pole piece, and the second corner of the diaphragm protrudes relative to the first corner of the pole piece. In the prior art, after the second corner protrudes from the first corner, the second corner will be located between the cover plate and the shell, thereby causing the problem of a cold weld between the cover plate and the shell. In the present application, the protrusion of the cover plate abuts against the second corner, so that the second corner is located in the gap. This can effectively prevent the second corner from being located between the shell and the cover plate, thereby effectively avoiding the occurrence of a cold weld when the cover plate and the shell are welded. Specifically, the battery can effectively avoid the occurrence of a cold weld when the cover plate and the shell are welded.

[0010] According to some embodiments of the battery of the present invention, a dimension of the protrusion relative to the main body is L1, and 1mm≤L1≤20mm.

[0011] According to some embodiments of the battery of the present invention, the thickness of the protrusion is L2, 0.005mm≤L2≤10mm

[0012] According to some embodiments of the battery of the present invention, the main body and the protruding portion are an integrated structure.

[0013] According to some embodiments of the battery of the present invention, the protrusion includes a first portion and a second portion, the first portion is connected to the second portion, the first portion is parallel to the width direction of the main body, and the second portion is parallel to the length direction of the main body.

[0014] According to some embodiments of the battery of the present invention, the protruding portion further includes an arc portion, and two ends of the arc portion are respectively connected to the first portion and the second portion.

[0015] According to some embodiments of the battery of the present invention, one side of the second corner abuts against the protrusion, and the other side of the second corner abuts against the cavity wall of the storage cavity and the pole piece.

[0016] According to some embodiments of the battery of the present invention, there are four protrusions provided, the four protrusions are arranged at intervals, and there are four second corners provided, each of the protrusions abuts against one of the second corners.

[0017] According to some embodiments of the battery of the present invention, the material of the protrusion is one of a polymer material, a composite material and a metal.

[0018] The electronic device according to the second embodiment of the present invention includes the battery described in any one of the first embodiment.

[0019] The electronic device according to the embodiment of the present utility model has at least the following beneficial effects: the battery cell includes a diaphragm and a pole piece, and the second corner of the diaphragm protrudes relative to the first corner of the pole piece. In the prior art, after the second corner protrudes from the first corner, the second corner will be located between the cover plate and the shell, thereby causing the problem of cold welding between the cover plate and the shell. In the present application, the protruding portion of the cover plate abuts against the second corner, so that the second corner is located in the gap, which can effectively avoid the second corner being located between the shell and the cover plate, thereby effectively avoiding the situation of cold welding when the cover plate and the shell are welded. Specifically, the battery can effectively avoid the situation of cold welding when the cover plate and the shell are welded. Furthermore, the electronic device with this battery has higher safety.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 A schematic diagram of a cover plate in a battery according to a first embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a cover plate in a battery according to a second embodiment of the present invention;

[0024] Figure 3 Schematic diagram of a battery housing in some embodiments of the present invention;

[0025] Figure 4 Schematic cross-sectional views of batteries according to some embodiments of the present invention;

[0026] Figure 5 Schematic diagram of electrodes and diaphragms in batteries according to some embodiments of the present invention;

[0027] Figure 6 A partial cross-sectional schematic diagram of a battery according to a first embodiment of the present invention;

[0028] Figure 7 A partial cross-sectional schematic diagram of a battery according to a second embodiment of the present invention;

[0029] Figure 8 Schematic diagram of battery cells and adhesive components in some embodiments of the present invention.

[0030] Reference numerals:

[0031] Battery 10, shell 100, storage cavity 110, gap 200, cover 300, main body 310, protrusion 320, first portion 321, arc portion 322, second portion 323, battery cell 400, electrode 410, first corner 411, first edge 412, second edge 413, diaphragm 420, second corner 421, third edge 422, fourth edge 423, adhesive 500. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limitations on the present invention.

[0034] In the description of this utility model, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the terms "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0037] In the related art, the battery 10 includes a cover plate 300, a shell 100 and a battery cell 400. The battery cell 400 includes an electrode 410 and a diaphragm 420, and the electrode 410 includes a positive electrode and a negative electrode. The diaphragm 420 is located between the positive electrode and the negative electrode. In order to effectively avoid direct contact between the positive electrode and the negative electrode, the width and length of the diaphragm 420 are greater than the width and length of the electrode 410. The battery cell 400 is placed in the storage cavity 110 of the shell 100, and the cover plate 300 and the shell 100 are welded to close the opening of the storage cavity 110. After the battery cell 400 is placed in the storage cavity 110, the diaphragm 420 at the corners of the battery cell 400 will protrude outside the storage cavity 110. After the diaphragm 420 is located between the cover plate 300 and the shell 100, this will cause a cold weld when the shell 100 and the cover plate 300 are welded. To this end, the present application proposes a battery 10.

[0038] Please refer to Figures 1 to 7In some embodiments, the battery 10 includes a housing 100, a battery cell 400, and a cover 300. The housing 100 has a storage cavity 110. The housing 100 is made of metal. The battery cell 400 includes a positive tab and a negative tab. The positive tab can be connected to a terminal post, which is insulated from the housing 100. The negative tab can be connected to the housing 100, thereby making the housing 100 negatively charged. Alternatively, the negative tab can be connected to a terminal post, which is insulated from the housing 100. The positive tab can be connected to the housing 100, thereby making the housing 100 positively charged. The battery cell 400 is disposed in the storage cavity 110, with a gap 200 between the electrode 410 and the wall of the storage cavity 110. That is, the volume of the storage cavity 110 is larger than that of the battery cell 400, and the volume of the battery cell 400 is smaller than that of the storage cavity 110, so that the battery cell 400 can be easily placed in the storage cavity 110. The shape of the battery cell 400 is compatible with the shape of the storage cavity 110. For example, if the storage cavity 110 is square or rectangular, the shape of the battery cell 400 is also square or rectangular. The battery cell 400 includes a separator 420 and an electrode 410, and the separator 420 is connected to the electrode 410. Specifically, the battery cell 400 includes a separator 420, a positive electrode, and a negative electrode. The separator 420 is located between the positive electrode and the negative electrode. The length and width of the separator 420 are both greater than the length and width of the electrode 410. The electrode 410 has a first corner 411. Specifically, the electrode 410 has a first edge 412 and a second edge 413. The first corner 411 refers to the connection between the end of the first edge 412 and the end of the second edge 413. For example, if the electrode 410 is rectangular, the first corner 411 is the junction between the long side and the short side of the electrode 410. Among them, the number of first corners 411 is not specifically limited, which can be determined according to the shape of the pole piece 410, and the shape of the pole piece 410 can be a triangle, a quadrilateral, a pentagon or a hexagon, etc. The diaphragm 420 has a second corner 421, and the second corner 421 protrudes relative to the first corner 411. The diaphragm 420 having a second corner 421 specifically means that the diaphragm 420 has a third edge 422 and a fourth edge 423, and the second corner 421 refers to the connection between the end of the third edge 422 and the end of the fourth edge 423. For example, if the diaphragm 420 is a rectangle, then the second corner 421 is the connection junction of the long side and the short side of the diaphragm 420. Among them, the number of second corners 421 is not specifically limited, which can be determined according to the shape of the diaphragm 420, and the shape of the diaphragm 420 can be a triangle, a quadrilateral, a pentagon or a hexagon, etc.

[0039] The following describes the specific structure of the cover plate 300. Figure 1 and Figure 2The cover plate 300 includes a main body 310 and a protrusion 320. The protrusion 320 is connected to the main body 310 and protrudes relative to the main body 310. The shape of the main body 310 can be square, rectangular or other shapes. The main body 310 is connected to the housing 100, and the connection of the main body 310 to the housing 100 can specifically be that the main body 310 is welded to the housing 100. The protrusion 320 abuts against the second corner 421, and the protrusion 320 and the second corner 421 are jointly arranged in the gap 200. That is, when the cover plate 300 is connected to the housing 100, the protrusion 320 will abut against the second corner 421, thereby stuffing the second corner 421 into the gap 200, effectively preventing the second corner 421 from being located between the cover plate 300 and the housing 100. Specifically, the protrusion 320 and the second corner 421 are jointly arranged in the gap 200.

[0040] For details, please refer to Figures 1 to 7 The battery cell 400 includes a diaphragm 420 and an electrode 410. The second corner 421 of the diaphragm 420 protrudes relative to the first corner 411 of the electrode 410. In the prior art, after the second corner 421 protrudes from the first corner 411, the second corner 421 will be located between the cover plate 300 and the shell 100, thereby causing a problem of a cold weld between the cover plate 300 and the shell 100. In the present application, the protrusion 320 of the cover plate 300 abuts against the second corner 421, so that the second corner 421 is located in the gap 200. This can effectively prevent the second corner 421 from being located between the shell 100 and the cover plate 300, thereby effectively avoiding the occurrence of a cold weld when the cover plate 300 and the shell 100 are welded. Specifically, the battery 10 can effectively avoid the occurrence of a cold weld when the cover plate 300 and the shell 100 are welded.

[0041] Further, please refer to Figure 2In some embodiments, the protrusion 320 protrudes from the main body 310 by a dimension L1, 1mm≤L1≤20mm. Specifically, the protrusion 320 protrudes from the main body 310 by a dimension of 1mm, 2mm, 5mm, 10mm, 15mm, 18mm, or 20mm. It is conceivable that when the protrusion 320 protrudes from the main body 310 by less than 1mm, the dimension of the protrusion 320 in the thickness direction of the shell 100 is small, and the dimension of the second corner 421 is large. This will cause the protrusion 320 to squeeze the second corner 421 into the gap 200, which is smaller. The second corner 421 may also be located between the shell 100 and the cover 300, causing a problem of cold welding between the shell 100 and the cover 300. When the protrusion 320 protrudes more than 20 mm relative to the main body 310 , the size of the protrusion 320 is relatively large. Under the premise that the protrusion 320 can squeeze the second corner 421 into the gap 200 , the excessive size of the protrusion 320 will cause material waste.

[0042] For further information, please refer to Figure 1 In some embodiments, the thickness of the protrusion 320 is L2, 0.005 mm ≤ L2 ≤ 10 mm. The thickness of the protrusion 320 can be 0.005 mm, 0.1 mm, 0.5 mm, 2 mm, 5 mm, 8 mm, 9 mm, or 10 mm. Since the protrusion 320 can be set in the gap 200, when the thickness of the protrusion 320 is greater than 10 mm, in order to facilitate the protrusion 320 to be set in the gap 200, the size of the gap 200 needs to be increased, which will reduce the energy density of the battery 10. When the thickness of the protrusion 320 is less than 0.005 mm, the thickness of the protrusion 320 is too small, which will make the processing of the protrusion 320 more difficult, increasing the manufacturing cost of the battery 10.

[0043] Furthermore, in some embodiments, the main body 310 and the protrusion 320 are an integrated structure. The main body 310 and the protrusion 320 are an integrated structure specifically means that the main body 310 and the protrusion 320 are made through an integrated molding process. The cover plate 300 made through the integrated molding process has the following advantages: 1. Improved production efficiency: The integrated molding process integrates multiple processes into one operation, greatly shortening the production cycle and improving the production efficiency of the cover plate 300. 2. Reduced costs: By reducing the production steps and mold preparation time of the cover plate 300, the integrated molding process can significantly reduce production costs. In addition, since the need for secondary processing and assembly is reduced, the scrap rate and material waste are also reduced. 3. Improved product quality: The integrated molding process directly completes the molding of the cover plate 300 in the mold, which can ensure the dimensional accuracy and surface quality of the cover plate 300. At the same time, it avoids the defects and stress concentration problems that may be caused by subsequent processing such as welding, thereby improving the overall performance and reliability of the product.

[0044] Furthermore, in some embodiments, the material of the protrusion 320 is one of a polymer material, a composite material, and a metal. Polymer materials include natural polymers and synthetic polymers. Natural polymers include natural fibers (cotton, wool, etc.), natural resins (rosin, shellac, etc.), natural rubber, and animal glue. Composite materials include: 1. Polymer-based composites: These use organic polymers (such as thermosetting resins, thermoplastic resins, and rubber) as a matrix. 2. Metal-based composites: These use metals as a matrix, such as aluminum-based composites and iron-based composites. 3. Inorganic non-metallic-based composites: These use ceramic materials (including glass and cement) as a matrix. Synthetic polymer materials include the three major synthetic materials of plastics, synthetic rubber, and synthetic fibers, as well as adhesives, coatings, and various functional polymer materials. These materials have properties such as low density, high mechanical strength, wear resistance, corrosion resistance, and electrical insulation. This ensures that the protrusion 320 has a long service life and is not easily damaged.

[0045] Furthermore, in some embodiments, the main body 310 and the protrusion 320 are separate structures. Specifically, the protrusion 320 can be connected to the main body 310 by welding or bonding.

[0046] Further, please refer to Figure 1In some embodiments, the protrusion 320 includes a first portion 321 and a second portion 323. The first portion 321 is connected to the second portion 323. The first portion 321 is parallel to the width direction of the main body 310, and the second portion 323 is parallel to the length direction of the main body 310. Specifically, the main body 310 can be square in shape, and the first portion 321 can be perpendicularly connected to the second portion 323, forming a right angle between the first portion 321 and the second portion 323. In this way, the shape of the protrusion 320 can be adapted to the square storage cavity 110, and the protrusion 320 can squeeze the second corner 421 into the gap 200. The lengths of the first portion 321 and the second portion 323 can be equal, or the lengths of the first portion 321 and the second portion 323 can be different.

[0047] For further information, please refer to Figure 1 In some embodiments, the protrusion 320 further includes a circular arc portion 322, and the two ends of the circular arc portion 322 are respectively connected to the first portion 321 and the second portion 323. Specifically, after the protrusion 320 includes the first portion 321, the circular arc portion 322 and the second portion 323, the shape of the protrusion 320 can be adapted to the rounded square storage cavity 110. In this way, the protrusion 320 can squeeze the second corner 421 into the gap 200. More specifically, after the protrusion 320 includes the first portion 321, the circular arc portion 322 and the second portion 323, the shape of the protrusion 320 can be adapted to the shape of most corners of the storage cavity 110, thereby widening the scope of application of the protrusion 320.

[0048] For further information, please refer to Figure 6 In some embodiments, one side of the second corner 421 abuts against the protrusion 320, and the other side of the second corner 421 abuts against the cavity wall of the storage cavity 110 and the pole piece 410. The function of the protrusion 320 will be described below. After the protrusion 320 is set in the gap 200, the protrusion 320 will abut against one side of the second corner 421, so that the second corner 421 is concave and located in the gap 200. At this time, the other side of the second corner 421 can abut against the cavity wall of the storage cavity 110 and the pole piece 410. Among them, the above-mentioned setting method can make the protrusion 320 have the effect of fixing the battery cell 400, and the protrusion 320 can effectively prevent the battery cell 400 from moving in the storage cavity 110, thereby improving the drop resistance of the battery 10.

[0049] When the size of the second corner 421 is larger, one side of the second corner 421 will wrap the entire protrusion 320. Figure 7In other embodiments, when the second corner 421 is smaller, the second corner 421 does not wrap around the protrusion 320. Specifically, one side of the second corner 421 abuts the protrusion 320, while two sides of the protrusion 320 abut the cavity wall of the storage cavity 110 and the second corner 421, respectively. This arrangement allows the protrusion 320 to secure the battery cell 400, effectively preventing the battery cell 400 from moving within the storage cavity 110, thereby improving the drop resistance of the battery 10.

[0050] Further, please refer to Figures 1 to 7 In some embodiments, four protrusions 320 are provided, and the four protrusions 320 are arranged at intervals. Four second corners 421 are provided, and each protrusion 320 abuts against one second corner 421. Specifically, the shape of the pole piece 410 can be square. The square pole piece 410 is convenient for manufacturing and processing. In addition, the square pole piece 410 can also be convenient for forming the battery cell 400 through winding or lamination processes. Similarly, the shape of the diaphragm 420 can also be square, and the square diaphragm 420 has four second corners 421. After four protrusions 320 are provided, the four protrusions 320 can respectively squeeze the four second corners 421 into the gap 200. In other embodiments, the number of second corners 421 can be determined according to the shape of the diaphragm 420, so that the number of protrusions 320 can be designed accordingly to avoid the second corners 421 being located between the shell 100 and the cover plate 300.

[0051] Further, please refer to Figure 8In some embodiments, the battery 10 further includes an adhesive 500. It can be imagined that the size of the diaphragm 420 is larger than the size of the electrode 410. Therefore, in some cases, in addition to the second corner 421 of the diaphragm 420 protruding from the first corner 411 of the electrode 410, the edge of the diaphragm 420 also protrudes from the edge of the electrode 410. At this time, the edge of the diaphragm 420 can be bonded by the adhesive 500, that is, the adhesive 500 is located between the two adjacent second corners 421. The specific way in which the adhesive 500 bonds the edge of the diaphragm 420 can be that one end of the adhesive 500 is bonded to one side of the battery cell 400 in the thickness direction, and the other end of the adhesive 500 is bonded to the other side of the battery cell 400 in the thickness direction. This can effectively prevent the edge of the diaphragm 420 from being located between the shell 100 and the cover plate 300. The adhesive 500 is not easily bonded to the second corner 421 of the separator 420 because, after bonding the adhesive 500 to the second corner 421, the adhesive 500 needs to be folded again, which results in a lower energy density of the battery 10. Furthermore, the edge of the separator 420 is not abutted and squeezed by the protrusion 320 because the adhesive 500 approach is less expensive than the protrusion 320 approach. Having the protrusion 320 only conform to the second corner 421 reduces the processing required for the protrusion 320 material, thereby saving costs.

[0052] In some embodiments, an electronic device includes the battery 10 of any of the above embodiments. Specifically, the battery cell 400 includes a diaphragm 420 and an electrode 410. The second corner 421 of the diaphragm 420 protrudes relative to the first corner 411 of the electrode 410. In the prior art, after the second corner 421 protrudes from the first corner 411, the second corner 421 will be located between the cover plate 300 and the housing 100, resulting in a problem of a cold weld between the cover plate 300 and the housing 100. In the present application, the protrusion 320 of the cover plate 300 abuts against the second corner 421, so that the second corner 421 is located in the gap 200. This can effectively prevent the second corner 421 from being located between the housing 100 and the cover plate 300, thereby effectively avoiding the problem of a cold weld when the cover plate 300 and the housing 100 are welded. Specifically, the battery 10 can effectively avoid the problem of a cold weld when the cover plate 300 and the housing 100 are welded. Furthermore, the electronic device including the battery 10 has a higher safety.

[0053] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. In addition, the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A battery, characterized in that include: a housing having a storage cavity; A battery cell is disposed in the storage cavity, the battery cell comprising a diaphragm and a pole piece, the diaphragm is connected to the pole piece, the pole piece has a first corner, the diaphragm has a second corner, the second corner protrudes relative to the first corner, and a gap is formed between the pole piece and the cavity wall of the storage cavity; The cover plate includes a main body and a protruding portion, wherein the protruding portion is connected to the main body and protrudes relative to the main body, the main body is connected to the shell, the protruding portion abuts against the second corner, and the protruding portion and the second corner are jointly arranged in the gap.

2. The battery according to claim 1, characterized in that A dimension of the protruding portion relative to the main body portion is L1, 1mm≤L1≤20mm.

3. The battery according to claim 1, characterized in that The thickness of the protruding portion is L2, 0.005 mm ≤ L2 ≤ 10 mm.

4. The battery according to claim 1, characterized in that The main body and the protruding portion are an integrated structure.

5. The battery according to claim 1, characterized in that The protruding portion includes a first portion and a second portion, the first portion is connected to the second portion, the first portion is parallel to the width direction of the main body portion, and the second portion is parallel to the length direction of the main body portion.

6. The battery according to claim 5, characterized in that The protruding portion further includes an arc portion, and two ends of the arc portion are respectively connected to the first portion and the second portion.

7. The battery according to claim 1, characterized in that One side of the second corner abuts against the protruding portion, and the other side of the second corner abuts against the cavity wall of the storage cavity and the pole piece.

8. The battery according to claim 1, characterized in that There are four protrusions provided, and the four protrusions are arranged at intervals. There are four second corners provided, and each protrusion abuts against one of the second corners.

9. The battery according to claim 1, characterized in that The material of the protrusion is one of a polymer material, a composite material and a metal.

10. An electronic device, characterized in that Comprising the battery according to any one of claims 1 to 9.

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