Battery and electronic equipment

Abstract

The invention discloses a battery, comprising: a housing having a storage cavity, the housing comprising a first surface and a second surface opposite to each other; the pole is connected to the first surface, and one end of the pole protrudes relative to the shell; the cover plate is connected to the shell; the battery cell is arranged in the storage cavity, the battery cell comprises a main body and a tab, the two ends of the tab are connected to the main body and the pole column respectively, and the side, away from the tab, of the main body abuts against the second face; the protection piece is arranged between the first surface and the battery cell, the protection piece 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 abuts against the battery cell, and the protruding part abuts against the first surface. The battery provided by the invention can have relatively high safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery and an electronic device. BACKGROUND

[0002] In the related art, for a steel shell battery, after the battery cell is placed in the shell, the tab needs to be connected with the pole, so as to realize the conduction between the battery cell and the outside. The battery needs to be subjected to mechanical tests to test the performance and safety of the battery. The mechanical tests include drop test, vibration test, and extrusion test, etc. Since there is a gap between the side of the battery cell with the tab and the shell, when the battery is subjected to mechanical tests, the battery cell is prone to pulling the tab, which may cause the tab to be torn, disconnected or short-circuited, thereby causing the battery to fail. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art. To this end, the present application provides a battery which can have high safety.

[0004] The present application also provides an electronic device.

[0005] The battery according to the first aspect of the present application comprises:

[0006] a shell having a storage cavity, the shell comprising a first face and a second face opposite to each other;

[0007] a pole connected to the first face, and one end of the pole protruding relative to the shell;

[0008] a cover plate connected to the shell;

[0009] a battery cell disposed in the storage cavity, the battery cell comprising a main body and a tab, two ends of the tab being connected to the main body and the pole respectively, and the side of the main body away from the tab abutting against the second face;

[0010] a protection member disposed between the first face and the battery cell, the protection member comprising a body portion and a protruding portion, the protruding portion being connected to the body portion and protruding relative to the body portion, the body portion abutting against the battery cell, and the protruding portion abutting against the first face.

[0011] The battery according to the present application has at least the following beneficial effects: one side of the battery cell abuts against the second face of the shell, the other side of the battery cell abuts against the body portion, and the protruding portion abuts against the first face. In this way, the two sides of the battery cell directly or indirectly abut against the shell through the protection member. When the battery is subjected to mechanical tests, such as drop test, the space for movement of the battery cell in the shell is limited, which can effectively avoid the problem of the tab being torn by the main body. Specifically, the battery can have high safety.

[0012] The battery according to some embodiments of the present application, the length of the protection piece is B1, 1mm≤B1≤4mm along the length direction of the battery cell.

[0013] The battery according to some embodiments of the present application, the length of the protection piece is B1, 1.55mm≤B1≤3.55mm along the length direction of the battery cell.

[0014] The battery according to some embodiments of the present application, the body part has a first cavity, the protruding part has a second cavity, and the first cavity and the second cavity are communicated.

[0015] The battery according to some embodiments of the present application, the projection of the body part falls on the projection of the main body along the thickness direction of the protection piece.

[0016] The battery according to some embodiments of the present application, the thickness of the protection piece is L1, 50μm≤L1≤500μm.

[0017] The battery according to some embodiments of the present application, a plurality of protruding parts are provided, and the plurality of protruding parts are arranged at intervals along the length direction of the body part.

[0018] The battery according to some embodiments of the present application, the material of the protection piece is one of polyether ether ketone, polyimide, polyether ether ketone composite material, thermoplastic elastomer and polyphenylene sulfide.

[0019] The battery according to some embodiments of the present application, the material of the protection piece has a Shore hardness≤90 degrees.

[0020] The battery according to some embodiments of the present application, the protruding part has an abutting surface, and the abutting surface abuts against the first surface.

[0021] The battery according to some embodiments of the present application, two protruding parts are provided, and the two protruding parts and the body part jointly define a groove, and part of the tab is arranged in the groove.

[0022] The battery according to some embodiments of the present application, the shell further comprises a third surface, a fourth surface, and a first chamfer surface and a second chamfer surface, the third surface and the fourth surface are oppositely arranged, two ends of the first chamfer surface are respectively connected to the third surface and the first surface, and two ends of the second chamfer surface are respectively connected to the fourth surface and the first surface.

[0023] The battery according to some embodiments of the present application, the radius of the first chamfer surface is L2, the connection part of the body part and the protruding part has a chamfer part, the radius of the chamfer part is L3, and 0.1mm≤L2-L3≤2mm.

[0024] According to some embodiments of the battery of the present application, the protruding part has a length in the length direction of the battery cell of L4, and L4≥0.1mm.

[0025] According to some embodiments of the battery of the present application, the protection part is further provided with a tab hole, and the distance between the tab hole and the edge of the protection part in the thickness direction of the battery is L5, and 0.2mm≤L5≤2mm.

[0026] According to the electronic device of the second aspect of the embodiments of the present application, the battery of any one of the first aspect of the embodiments is included.

[0027] According to the electronic device of the embodiments of the present application, at least the following beneficial effects are achieved: one side of the battery cell abuts against the second face of the shell, the other side of the battery cell abuts against the body part, and the protruding part abuts against the first face. In this way, the two sides of the battery cell can directly or indirectly abut against the shell through the protection part. When the battery is subjected to mechanical tests such as drop tests, the space for movement of the battery cell in the shell is limited, which can effectively avoid the problem of tearing of the tab by the main body. Specifically, the battery can have higher safety. Further, the electronic device having the battery has better safety.

[0028] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0029] The present application will be further described below in conjunction with the drawings and embodiments, in which:

[0030] Figure 1 a schematic view of the protection part in the battery of the first embodiment of the present application;

[0031] Figure 2 a schematic view of the protection part in the battery of the second embodiment of the present application;

[0032] Figure 3 a schematic view of the protection part in the battery of the third embodiment of the present application;

[0033] Figure 4 a schematic view of the protection part in the battery of the fourth embodiment of the present application

[0034] Figure 5 a schematic view of the battery of some embodiments of the present application.

[0035] LIST OF REFERENCE NUMBERS

[0036] Battery 10, shell 100, storage cavity 110, first face 120, second face 130, third face 140, fourth face 150, first chamfered face 160, second chamfered face 170, protective piece 200, body part 210, protruding part 220, abutting face 221, recess 230, chamfered part 240, liquid passing hole 250, tab hole 260, battery cell 300. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters in the drawing figures refer to components having the same function or the same properties. The embodiments described below are exemplary only, and are not intended to be limiting of the present application.

[0038] In the description of the present application, if the orientation description, such as up, down, front, back, left, right, and the like, is referred to, the orientation or position relationship shown in the drawing is based on the orientation or position relationship, which is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, and the like are understood as not including the number, above, below, and the like are understood as including the number. If the first, second, and the like are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0040] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0041] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Please refer to Figures 1 to 5In some embodiments, the battery 10 comprises a housing 100, a pole, a cover plate, a cell 300 and a protection piece 200. The housing 100 has a storage cavity 110, and the housing 100 comprises a first face 120 and a second face 130 opposite to each other. The housing 100 can have a rectangular shape. The housing 100 comprises the first face 120 and the second face 130, a third face 140 and a fourth face 150 opposite to each other, and a fifth face. The first face 120, the second face 130, the third face 140 and the fourth face 150 are connected to the fifth face, thereby forming the storage cavity 110. The cover plate is connected to the housing 100, and the cover plate closes the opening of the storage cavity 110. It is to be noted that the cover plate becomes the sixth face of the housing 100 after the cover plate is connected to the storage cavity 110. The fifth face and the sixth face are the largest faces of the housing 100. The pole is connected to the first face 120, and one end of the pole protrudes from the housing 100 (not shown in the figure). The pole can comprise a positive pole and a negative pole, and the positive pole and the negative pole can conduct the cell 300 and the outside. The cover plate is connected to the housing 100. The cover plate can be connected to the housing 100 by welding. That is, the cover plate can be connected to the housing 100 by welding. The cell 300 is arranged in the storage cavity 110. The cell 300 comprises a main body and a tab, and the two ends of the tab are connected to the main body and the pole respectively. The side of the main body away from the tab abuts against the second face 130. The protection piece 200 is arranged between the first face 120 and the cell 300, and the protection piece 200 comprises a body part 210 and a protruding part 220. The protruding part 220 is connected to the body part 210, and the protruding part 220 protrudes from the body part 210. The body part 210 abuts against the cell 300, and the protruding part 220 abuts against the first face 120.

[0043] Specifically, referring to Figure 5 , wherein Figure 5 In order to facilitate viewing of the cell 300, the protection piece 200 and the housing 100, the cell 300 is not in contact with the protection piece 200 and the housing 100. One side of the cell 300 abuts against the second face 130 of the housing 100, and the other side of the cell 300 abuts against the body part 210. The protruding part 220 abuts against the first face 120. In this way, the cell 300 can be directly or indirectly abutted against the housing 100 by the protection piece 200. When the battery 10 is subjected to mechanical tests, such as drop tests, the space for movement of the cell 300 in the housing 100 is limited, which can effectively avoid the problem of tearing of the tab by the main body. Specifically, the battery 10 can have high safety.

[0044] It should be noted that in the prior art, after the battery cell 300 is placed in the storage cavity 110, a certain space is left between the battery cell 300 and the shell 100 to facilitate the welding of the tabs and the poles. After the tabs and the poles are welded, since there is a gap between the battery cell 300 and the shell 100, when the battery 10 falls, the main body of the battery cell 300 will move in the storage cavity 110, thereby the main body pulls the tabs, causing the tabs to tear or break the connection between the tabs and the poles. In the present application, after the protector 200 is arranged, the main body of the battery cell 300 and the shell 100 can effectively avoid having a large gap, and the arrangement of the body part 210 of the protector 200 abutting against the battery cell 300 and the protruding part 220 abutting against the first face 120 can effectively avoid the main body of the battery cell 300 moving in the storage cavity 110, thereby causing the tabs to be damaged. In addition, during the mechanical test of the battery 10, the protector 200 can also bear most of the impact force, thereby effectively avoiding the main body of the battery cell 300 and the shell 100 being damaged after being in contact. In addition, the material of the protector 200 can be an insulating material, thereby the protector 200 can also effectively prevent the battery 10 from short-circuiting.

[0045] Further, please refer to Figure 3 In some embodiments, the length of the protector 200 along the length direction of the battery cell 300 is B1, and 1mm≤B1≤4mm. Specifically, the length of the protector 200 can be 1mm, 1.15mm, 1.2mm, 1.55mm, 1.95mm, 2.0mm, 2.35mm, 2.5mm, 2.75mm, 3.15mm, 3.5mm or 4mm. When the length of the protector 200 is less than 1mm, the anti-falling performance of the battery 10 will be poor, and the protector 200 cannot play a good protection effect. When the length of the protector 200 is greater than 4mm, the protector 200 will have a large volume, thereby wasting too much material and causing high cost, and the length of the protector 200 being too large will cause the protector 200 to damage the battery cell 300. Specifically, the following experimental data is used for illustration. A plurality of same bare battery cells 300 and shells 100 are prepared, and the length of the protector 200 is 0.95mm, 1mm, 1.55mm, 1.95mm, 2.35mm, 2.75mm, 3.15mm, 3.55mm, 3.65mm and 4mm. Then the protectors 200 of different sizes are installed in the shell 100, and then the battery cell 300 is fully charged and subjected to directional falling (when falling, the six faces of the battery 10 and the four corners of the battery 10 are respectively dropped from a height of one meter towards the marble floor, which is one round of test) limit test until falling failure, and if it is not failed after 5 rounds, it is passed. Specifically, please refer to the following Table 1 and Table 2.

[0046]

[0047]

[0048] Table 1

[0049] Comparative Example 1 1 wheel failure Comparative Example 2 2 wheel failure Comparative Example 3 2 wheel failure Example 1 7 wheel failure Example 2 6 wheel failure Example 3 6 wheel failure Example 4 7 wheel failure Example 5 6 wheel failure Example 6 6 wheel failure Example 7 6 wheel failure Example 8 6 wheel failure

[0050] Table 2

[0051] Summarizing the above table, the directional drop test standard is five passes, so Examples 1, 2, 3, 4, 5, 6, 7, and 8 all passed the test. Comparative Example 1 lacks a protective member 200, which easily causes the tab to contact the housing 100, leading to a short circuit. Comparative Example 2, due to the excessively short protective member 200, was unable to effectively protect the positive tab after a drop, resulting in a short circuit and failure. Comparative Example 3, due to the excessively long protective member 200, resulted in excessive cost and damage to the battery cell 300.

[0052] Furthermore, the above limits the length of the protective member 200 so that the protective member 200 has a better protective effect. In the process of installing the protective member 200 to the shell 100, whether the protective member 200 is easy to install will affect the installation efficiency of the staff. In order to facilitate the installation of the protective member 200, the length of the protective member 200 can be further limited. Specifically, in some embodiments, along the length direction of the battery cell 300, the length of the protective member 200 is B1, 1.55mm≤B1≤3.55mm. Specifically, the length of the protective member 200 can be 1.55mm, 1.95mm, 2.0mm, 2.35mm, 2.5mm, 2.75mm, 3.15mm or 3.55mm. In particular, when the length of the protective member 200 is less than 1.55mm, it will make the installation of the protective member 200 more difficult, resulting in a lower installation efficiency. When the length of the protective member 200 is greater than 3.55 mm, the installation difficulty of the protective member 200 is relatively low. However, the protective member 200 is still too long, causing the protective member 200 to occupy too much space within the housing 100, resulting in a smaller size of the battery cells 300 within the housing 100 and a lower energy density of the battery 10. In other words, the protective member 200 is easy to install, but the energy density of the battery 10 is low. This is demonstrated experimentally below; please refer to the table below for details.

[0053]

[0054] Table 3

[0055] In summary, when the length of the protective member 200 is greater than 1.55 mm, the longer the protective member 200 is, the easier it is to install. However, the length of the protective member 200 should not exceed 3.55 mm, as this would result in a lower energy density of the battery 10.

[0056] Further, in some embodiments, the body portion 210 has a first cavity, the protruding portion 220 has a second cavity, and the first cavity and the second cavity are in communication. Specifically, the body portion 210 is configured to have the first cavity and the protruding portion 220 is configured to have the second cavity in such a way that the protector 200 is a hollow structure. In a first aspect, after the body portion 210 is configured to have the first cavity and the protruding portion 220 is configured to have the second cavity, the weight of the protector 200 can be reduced, thereby indirectly reducing the weight of the battery 10, which can make the battery 10 lightweight. In a second aspect, after the body portion 210 is configured to have the first cavity and the protruding portion 220 is configured to have the second cavity, the protector 200 can have good support and good elasticity, which can make the protector 200 deform when impacted and effectively avoid the protector 200 damaging the battery cell 300.

[0057] Further, the body portion 210 of the protector 200 abuts against the battery cell 300 in two ways, one way is that the protector 200 is sleeved on the main body, and the other way is that the protector 200 is not sleeved on the main body. The first way is introduced as follows. In some embodiments, part of the battery cell 300 is arranged in the first cavity. Specifically, the protector 200 is sleeved on the main body in such a way that the first cavity is sleeved on the main body, and such an arrangement can reduce the volume occupied by the protector 200 in the shell 100, so that the battery cell 300 has more volume, thereby making the battery 10 have a higher energy density.

[0058] The second way is introduced as follows. In some embodiments, the projection of the body portion 210 in the thickness direction of the protector 200 falls on the projection of the main body. Specifically, in this way, the cross-sectional area of the protector 200 is smaller than the cross-sectional area of the main body, and one end of the body portion 210 abuts against the main body. The arrangement that one end of the body portion 210 abutting against the main body away from the protruding portion 220 can effectively avoid the problem of the battery cell 300 being too thick. Specifically, after the protector 200 is sleeved on the main body, the final thickness of the battery cell 300 is the thickness of the protector 200 plus the thickness of the main body, which will increase the final thickness of the battery 10, resulting in a lower energy density of the battery 10.

[0059] Further, in some embodiments, the thickness of the protection piece 200 is L1, 50 μm≤L1≤500 μm. For example, the thickness of the protection piece 200 can be 50 μm, 60 μm, 100 μm, 200 μm, 300 μm or 500 μm. When the thickness of the protection piece 200 is less than 50 μm, the processing difficulty is large due to the thin thickness of the protection piece 200, which results in high manufacturing cost of the protection piece 200. Meanwhile, the thin thickness of the protection piece 200 results in poor supporting ability of the protection piece 200, which cannot achieve good buffering effect. When the thickness of the protection piece 200 is greater than 500 μm, the manufacturing difficulty of the protection piece 200 is large due to the large thickness of the protection piece 200. In addition, the large thickness of the protection piece 200 results in waste of material.

[0060] Specifically, the protruding part 220 can abut against the first surface 120, so as to effectively bear the impact force. It is conceivable that, in order to make the buffering ability of the protruding part 220 good, a plurality of protruding parts 220 can be arranged. Therefore, please refer to Figure 1 In some embodiments, the protruding part 220 is provided with a plurality of protruding parts 220, which are arranged at intervals along the length direction of the body part 210. Specifically, the protruding part 220 can be two, three or four, and the two protruding parts 220 abut against the two ends of the first surface 120 respectively, so that the protruding part 220 achieves good buffering effect and protects the tab from being damaged. In addition, the plurality of protruding parts 220 can have more contact area with the first surface 120, which can effectively share the impact force received by each position of the main body.

[0061] Furthermore, in some embodiments, the material of the protective member 200 is one of polyetheretherketone, polyimide, polyetheretherketone composite material, thermoplastic elastomer and polyphenylene sulfide. Polyetheretherketone (PEEK) is a high-performance thermoplastic plastic material with a certain elasticity. It can deform within a certain range and return to its original shape after the external force disappears. Polyimide (PI) is a special engineering material with excellent high-temperature resistance. The polyetheretherketone composite material is based on polyetheretherketone resin and is reinforced by adding other materials (such as fibers). Since the matrix material PEEK itself has a certain elasticity, the composite material will also exhibit certain elastic properties. Thermoplastic elastomer (TPE) has both the high elasticity of traditional cross-linked vulcanized rubber and the characteristics of easy processing of ordinary plastics. Its elastic properties are significant, and it can deform freely within a certain range and return to its original shape. Polyphenylene sulfide (PPS) also has a certain elasticity. Specifically, when the protective member 200 is made of one of the aforementioned materials, it exhibits good elasticity, thus being able to withstand the impact of the main body's movement, thereby providing a buffer and effectively protecting the tabs. Furthermore, all of the aforementioned materials are heat-resistant. Since the battery cell 300 generates heat during charging and discharging, this high-temperature resistance also extends the service life of the protective member 200.

[0062] Furthermore, the Shore hardness of the material of the protective member 200 is ≤ 90 degrees. If the Shore hardness of the protective member 200 is greater than 90 degrees, the protective member 200 may pierce the battery cell 300 due to its excessive hardness during a drop, causing damage to the battery cell 300. The Shore hardness of the protective member 200 can be 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, or 90 degrees.

[0063] Furthermore, when the protrusion 220 abuts against the first surface 120, the protrusion 220 can be in line contact with the first surface 120 (the protrusion 220 can be as Figure 1 As shown), that is, the shape of the protrusion 220 is circular. The protrusion 220 can also be in surface contact with the first surface 120 (the protrusion 220 can be as shown). Figure 3 As shown), the surface of the protrusion 220 is a plane. Figure 3 In some embodiments, the protrusion 220 has a contact surface 221, which contacts the first surface 120. Specifically, the contact surface 221 can be a plane, and the first surface 120 is also a plane. When the planes contact each other, a larger contact area is formed between the protrusion 220 and the first surface 120, which can evenly disperse the impact force from the main body.

[0064] Further, it is conceivable that the protection member 200 needs to be provided with a recess 230 to leave space for the worker to weld the tab and the pole. Specifically, the recess 230 can be formed by the two protrusions 220 and the body portion 210. That is, please refer to Figure 2 and Figure 3 In some embodiments, the two protrusions 220 are provided to jointly define the recess 230 with the body portion 210, and part of the tab is arranged in the recess 230. The recess 230 is provided with a through hole, which can be used for the tab to pass through and then be welded with the pole. The tab and the pole can be directly welded or indirectly welded. The indirect welding is achieved by connecting the tab and the pole by a connecting sheet. When the tab and the pole are connected by the connecting sheet, the width of the connecting sheet is greater than the width of the recess 230. In addition, the two protrusions 220 can abut against the first face 120, which can make the protection member 200 evenly share the impact force from the main body. It is conceivable that the protrusions 220 can be further provided with another through hole for the negative tab to pass through.

[0065] Further, please refer to Figure 5 In some embodiments, the shell 100 further includes a third face 140, a fourth face 150, and a first chamfered face 160 and a second chamfered face 170. The third face 140 and the fourth face 150 are oppositely arranged. The two ends of the first chamfered face 160 are respectively connected to the third face 140 and the first face 120. The two ends of the second chamfered face 170 are respectively connected to the fourth face 150 and the first face 120. Specifically, the first chamfered face 160 can be formed after chamfering the connection between the first face 120 and the third face 140. The second chamfered face 170 can be formed after chamfering the connection between the second face 130 and the fourth face 150. The first chamfered face 160 and the second chamfered face 170 can make the shell 100 more rounded, effectively preventing the shell 100 from hurting the user. In addition, the first chamfered face 160 and the second chamfered face 170 can also facilitate the worker to process and manufacture the shell 100.

[0066] Further, in some embodiments, the first chamfer surface 160 has a radius of L2, the connection between the body portion 210 and the protruding portion 220 has a chamfer portion 240, the chamfer portion 240 has a radius of L3, and 0.1mm≤L2-L3≤2mm. Specifically, L2-L3 can be equal to 0.1mm, 0.5mm, 1mm, or 2mm. When the difference between the radius of the chamfer portion 240 and the radius of the first chamfer surface 160 is less than 0.1mm, it will cause stress concentration at this position, and the shell 100 will be damaged when the battery 10 falls. When the difference between the radius of the chamfer portion 240 and the radius of the first chamfer surface 160 is greater than 2mm, the difference between the radius of the chamfer portion 240 and the radius of the first chamfer surface 160 is too large, which will cause the protection piece 200 and the shell 100 to be poorly fitted, and the protection piece 200 is easy to shake in the shell 100.

[0067] Further, referring to Figure 3 In some embodiments, the protruding portion 220 has a size of L4 in the length direction of the battery cell 300, and L4≥0.1mm. L4 can be 0.2mm, 0.3mm, 0.4mm, etc. If L4 is less than 0.1mm, the size of the protruding portion 220 will be small, which cannot provide a good buffer distance, and thus cannot effectively protect the tab.

[0068] Further, referring to Figure 4 The protection piece 200 is also provided with a tab hole 260, and the distance between the tab hole 260 and the edge of the protection piece 200 in the thickness direction of the battery 10 is L5, and 0.2mm≤L5≤2mm. Specifically, the tab hole 260 can be provided with two, respectively for the positive and negative tabs. The distance between the tab hole 260 and the edge of the protection piece 200 is specifically the closest distance between the tab hole 260 and the edge of the protection piece 200 in the thickness direction of the battery 10. The tab hole 260 can be provided on the protruding portion 220 or the body portion 210. When L5 is less than 0.2mm, the positive tab passing through the tab hole 260 will contact the shell 100 due to the close distance between the tab hole 260 and the edge of the protection piece 200. When L5 is greater than 2mm, the tab hole 260 will deviate too much from the middle position of the protection piece 200, which will make it inconvenient to weld the positive tab and the pole in the future.

[0069] Further, in some embodiments, the length of the body portion 210 is greater than the length of the main body, and the length of the body portion 210 is less than the width of the storage cavity 110. Specifically, the difference between the length of the body portion 210 and the width of the storage cavity 110 is 0.3mm. If the length of the body portion 210 is too large, the body portion 210 cannot be placed in the storage cavity 110.

[0070] Further, in some embodiments, the first face 120 of the shell 100 is further provided with a liquid injection hole, wherein the liquid injection hole is used for injecting electrolyte into the storage cavity 110. When the electrolyte is injected from the shell 100 into the storage cavity 110, in order to facilitate the injection of liquid, the liquid injection hole can be provided with a liquid passing hole 250 on the body part 210 or the protruding part 220, so as to facilitate the electrolyte to enter. The shape of the liquid passing hole 250 can be oval or circular. When the liquid passing hole 250 is circular, the diameter of the liquid passing hole 250 is greater than the diameter of the liquid injection hole. The diameter of the liquid injection hole can be 1mm-2mm, and the diameter of the liquid passing hole 250 can be 2.5mm-3mm. When the liquid passing hole 250 is oval, the projection of the liquid injection hole falls within the projection range of the liquid passing hole 250 along the length direction of the battery cell 300.

[0071] Further, in some embodiments, the protection piece 200 is provided with a tab hole 260 for the tab to pass through. The length of the tab hole 260 is greater than the width of the tab, which can facilitate the tab to pass through the tab hole 260. Specifically, the length of the tab hole 260 is L6, and the width of the tab is L7, 0.8mm≤L6-L7≤3mm. If the difference between the length of the tab hole 260 and the width of the tab is less than 0.8, it will cause greater difficulty in processing, and if the difference between the length of the tab hole 260 and the width of the tab is greater than 3mm, since the tab hole 260 is too large, it will cause the strength of the protection piece 200 to be smaller.

[0072] In some embodiments, the electronic device comprises the battery 10 of any one of the above embodiments. Specifically, one side of the battery cell 300 abuts against the second face 130 of the shell 100, and the other side of the battery cell 300 abuts against the body part 210, and the protruding part 220 abuts against the first face 120, so that the two sides of the battery cell 300 can be directly or indirectly abutted against the shell 100 through the protection piece 200, and when the battery 10 is subjected to mechanical tests such as drop tests, the space for the movement of the battery cell 300 in the shell 100 is limited, which can effectively avoid the problem of the tab being torn by the main body. Specifically, the battery 10 can have higher safety. Further, the electronic device with the battery 10 has better safety.

[0073] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the scope of knowledge of those skilled in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery, characterized by, The battery comprises: a housing having a storage cavity, the housing comprising opposite first and second faces; a pole connected to the first face, one end of the pole protruding relative to the housing; a cover plate connected to the housing; an electric core arranged in the storage cavity, the electric core comprising a main body and a tab, two ends of the tab being connected to the main body and the pole respectively, a side of the main body away from the tab abutting against the second face; a protection member arranged between the first face and the electric core, the protection member comprising a body portion and a protruding portion, the protruding portion being connected to the body portion and protruding relative to the body portion, the body portion abutting against the electric core, and the protruding portion abutting against the first face.

2. The battery of claim 1, wherein, The length of the protection member along the length direction of the electric core is B1, and 1mm≤B1≤4mm.

3. The battery of claim 2, wherein, The length of the protection member along the length direction of the electric core is B1, and 1.55mm≤B1≤3.55mm.

4. The battery according to claims 1 to 3, characterized in that, The body portion has a first cavity, and the protruding portion has a second cavity, the first cavity and the second cavity being in communication.

5. The battery of claim 4, wherein, The projection of the body portion along the thickness direction of the protection member falls on the projection of the main body.

6. The battery of claim 4, wherein, The thickness of the protection member is L1, and 50μm≤L1≤500μm.

7. The battery of claim 1, wherein, A plurality of protruding portions are arranged along the length direction of the body portion.

8. The battery of claim 1, wherein, The material of the protection member is one of polyether ether ketone, polyimide, polyether ether ketone composite material, thermoplastic elastomer and polyphenylene sulfide.

9. The battery of claim 1, wherein, The Shore hardness of the material of the protection member is ≤90 degrees.

10. The battery of claim 1, wherein, The protruding portion has an abutting face abutting against the first face.

11. The battery of claim 1, wherein, Two protruding portions are arranged, and the two protruding portions and the body portion jointly define a groove, and part of the tab is arranged in the groove.

12. The battery of claim 1, wherein, The housing further comprises a third face, a fourth face, a first chamfered face and a second chamfered face, the third face and the fourth face being oppositely arranged, two ends of the first chamfered face being connected to the third face and the first face respectively, and two ends of the second chamfered face being connected to the fourth face and the first face respectively.

13. The battery of claim 12, wherein, The radius of the first chamfered face is L2, the connection between the body portion and the protruding portion has a chamfered portion, the radius of the chamfered portion is L3, and 0.1mm≤L2-L3≤2mm.

14. The battery of claim 1, wherein, The size of the protruding portion along the length direction of the electric core is L4, and L4≥0.1mm.

15. The battery of claim 1, wherein, The protection member further has a tab hole, and the distance between the tab hole and the edge of the protection member along the thickness direction of the battery is L5, and 0.2mm≤L5≤2mm.

16. An electronic device, characterized by The battery comprises the battery as claimed in any one of claims 1 to 15.

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