Batteries and electronic devices

Abstract

The utility model discloses a battery, comprising: a shell having a storage cavity, the shell comprising a first surface and a second surface opposite to each other; a pole connected to the first surface, and one end of the pole protruding relative to the shell; a cover plate connected to the shell; a battery cell arranged in the storage cavity, the battery cell comprising a main body and a pole ear, the two ends of the pole ear are respectively connected to the main body and the pole, and the side of the main body away from the pole ear abuts against the second surface; a protective member arranged between the first surface and the battery cell, the protective member comprising a main body and a protruding portion, the protruding portion is connected to the main body, and the protruding portion protrudes relative to the main body, the main body abuts against the battery cell, and the protruding portion abuts against the first surface. The battery of the utility model can have high safety.

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, for steel-shell batteries, after the battery cell is placed in the shell, the tabs need to be connected to the poles to achieve conduction between the battery cell and the outside world. Among them, the battery needs to be mechanically tested to test the performance and safety of the battery. Mechanical tests include drop tests, vibration tests, and extrusion tests. Since there is a gap between one side of the tab of the battery cell and the shell, when the battery is mechanically tested, it is easy for the battery cell to pull the tab, causing the tab to tear, disconnect or short-circuit, thereby causing the battery to fail. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery with higher safety.

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

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

[0006] A housing having a storage cavity, the housing comprising a first surface and a second surface opposite to each other;

[0007] A pole connected to the first surface, with one end of the pole protruding relative to the shell;

[0008] A cover plate connected to the housing;

[0009] A battery cell is arranged in the storage cavity, the battery cell comprises a main body and a pole ear, two ends of the pole ear are respectively connected to the main body and the pole, and a side of the main body away from the pole ear abuts against the second surface;

[0010] A protective member is arranged between the first surface and the battery cell, and 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 abuts against the battery cell, and the protruding portion abuts against the first surface.

[0011] The battery according to the embodiment of the utility model has at least the following beneficial effects: one side of the battery cell abuts against the second surface of the shell, the other side of the battery cell abuts against the main body, and the protrusion abuts against the first surface, so that the two sides of the battery cell can directly or indirectly abut against the shell through the protective member, and when the battery is mechanically tested, such as a drop test, the space for the battery cell to move 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 higher safety.

[0012] According to the batteries of some embodiments of the present utility model, along the length direction of the battery core, the length of the protective member is B1, 1mm≤B1≤4mm.

[0013] According to the batteries of some embodiments of the present invention, along the length direction of the battery core, the length of the protective member is B1, and 1.55 mm≤B1≤3.55 mm.

[0014] In the battery according to some embodiments of the present invention, the main body has a first cavity, the protruding portion has a second cavity, and the first cavity is connected to the second cavity.

[0015] According to the battery of some embodiments of the present invention, along the thickness direction of the protective member, the projection of the main body portion falls on the projection of the main body.

[0016] In the battery according to some embodiments of the present invention, the thickness of the protective member is L1, 50 μm≤L1≤500 μm.

[0017] According to the battery of some embodiments of the present utility model, a plurality of the protrusions are provided, and the plurality of the protrusions are arranged at intervals along the length direction of the main body.

[0018] According to the batteries of some embodiments of the present invention, the material of the protective component is one of polyetheretherketone, polyimide, polyetheretherketone composite material, thermoplastic elastomer and polyphenylene sulfide.

[0019] In the battery of some embodiments of the present utility model, the Shore hardness of the material of the protective element is ≤90 degrees.

[0020] In the battery of some embodiments of the present invention, the protrusion has a contact surface, and the contact surface contacts the first surface.

[0021] According to the battery of some embodiments of the present utility model, two protrusions are provided, and the two protrusions and the main body together define a groove, and part of the pole ear is arranged in the groove.

[0022] According to some embodiments of the battery of the present utility model, the shell also includes a third surface, a fourth surface, a first chamfered surface and a second chamfered surface, the third surface and the fourth surface are arranged opposite to each other, the two ends of the first chamfered surface are respectively connected to the third surface and the first surface, and the two ends of the second chamfered surface are respectively connected to the fourth surface and the first surface.

[0023] In the battery according to some embodiments of the present invention, the radius of the first chamfered surface is L2, a chamfered portion is provided at a connection between the main body portion and the protruding portion, the radius of the chamfered portion is L3, and 0.1 mm ≤ L2 - L3 ≤ 2 mm.

[0024] According to some embodiments of the battery of the present invention, a dimension of the protrusion in the length direction of the battery core is L4, and L4 ≥ 0.1 mm.

[0025] According to some embodiments of the battery of the present invention, the protective member is further provided with a pole ear hole, and along the thickness direction of the battery, the distance between the pole ear hole and the edge of the protective member is L5, 0.2mm≤L5≤2mm.

[0026] The electronic device according to the second aspect of the present invention comprises the battery described in any one of the first aspect.

[0027] The electronic device according to the embodiment of the utility model has at least the following beneficial effects: one side of the battery cell abuts against the second side of the shell, the other side of the battery cell abuts against the main body, and the protrusion abuts against the first side. In this way, the two sides of the battery cell can be directly or indirectly abutted against the shell through the protective member. When the battery is mechanically tested, such as a drop test, the space for the battery cell to move 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 a higher safety. Furthermore, the electronic device with the battery has better safety.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 A schematic diagram of a protective element in a battery according to a first embodiment of the utility model;

[0031] Figure 2 A schematic diagram of a protective element in a battery according to a second embodiment of the utility model;

[0032] Figure 3A schematic diagram of a protective element in a battery according to a third embodiment of the present utility model;

[0033] Figure 4 A schematic diagram of a protective element in a battery according to a fourth embodiment of the utility model

[0034] Figure 5 Schematic diagram of batteries according to some embodiments of the present invention.

[0035] Reference numerals:

[0036] Battery 10, shell 100, storage cavity 110, first surface 120, second surface 130, third surface 140, fourth surface 150, first chamfered surface 160, second chamfered surface 170, protective member 200, main body 210, protrusion 220, abutting surface 221, groove 230, chamfered portion 240, liquid passage hole 250, pole ear hole 260, battery cell 300. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientation, 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, and 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, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. 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.

[0041] In the description of the utility model, the description with reference to the terms "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 utility model. In this specification, the schematic representation 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 5 In some embodiments, the battery 10 includes: a shell 100, a pole, a cover plate, a battery cell 300 and a protective member 200. The shell 100 has a storage cavity 110, and the shell 100 includes a first face 120 and a second face 130 opposite to each other. Among them, the shape of the shell 100 can be rectangular. The shell 100 includes a first face 120 and a second face 130 opposite to each other, 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 all connected around the fifth face to form a storage cavity 110. After the cover plate is connected to the shell 100, the cover plate closes the opening of the storage cavity 110. It should be supplemented that after the cover plate is connected to the storage cavity 110, the cover plate becomes the sixth face of the shell 100. Among them, the fifth face and the sixth face are the faces with the largest area in the shell 100. The pole is connected to the first face 120, and one end of the pole protrudes relative to the shell 100 (not shown in the figure). The poles may include positive poles and negative poles, and the positive poles and negative poles may function to connect the battery cell 300 to the outside world. The cover plate is connected to the shell 100. The specific way in which the cover plate is connected to the shell 100 may be welding. That is, the cover plate may be connected to the shell 100 by welding. The battery cell 300 is disposed in the storage cavity 110. The battery cell 300 includes a main body and a pole ear, and the two ends of the pole ear are respectively connected to the main body and the pole, and the side of the main body away from the pole ear abuts against the second surface 130. The protective member 200 is disposed between the first surface 120 and the battery cell 300, and the protective member 200 includes a main body portion 210 and a protruding portion 220, the protruding portion 220 is connected to the main body portion 210, and the protruding portion 220 protrudes relative to the main body portion 210, the main body portion 210 abuts against the battery cell 300, and the protruding portion 220 abuts against the first surface 120.

[0043] For details, please refer to Figure 5 ,in Figure 5In order to facilitate viewing of the battery cell 300, the protective member 200 and the shell 100, the battery cell 300 does not contact the protective member 200 and the shell 100. One side of the battery cell 300 abuts against the second surface 130 of the shell 100, the other side of the battery cell 300 abuts against the main body 210, and the protrusion 220 abuts against the first surface 120. In this way, the two sides of the battery cell 300 can be directly or indirectly abutted against the shell 100 through the protective member 200. When the battery 10 is mechanically tested, such as a drop test, the space for the battery cell 300 to move 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.

[0044] It should be added 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 pole ear and the pole column. After the pole ear and the pole column 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, so that the main body pulls the pole ear, causing the pole ear to tear or disconnect the connection between the pole ear and the pole column. In the present application, after the protective member 200 is set, it can effectively avoid a large gap between the main body of the battery cell 300 and the shell 100, and the main body 210 of the protective member 200 abuts on the battery cell 300 and the protrusion 220 abuts on the first surface 120, which can effectively prevent the main body of the battery cell 300 from moving in the storage cavity 110, thereby causing damage to the pole ear. In addition, during the mechanical test of the battery 10, the protective member 200 can also bear most of the impact force, thereby effectively preventing the main body of the battery cell 300 from being damaged after contact with the shell 100. In addition, the material of the protective member 200 can be an insulating material, so that the protective member 200 can also effectively prevent the battery 10 from short circuiting.

[0045] For further information, please refer to Figure 3In some embodiments, along the length direction of the battery cell 300, the length of the protective member 200 is B1, 1mm≤B1≤4mm. Specifically, the length of the protective member 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. Among them, when the length of the protective member 200 is less than 1mm, the anti-fall performance of the battery 10 will be poor, and the protective member 200 will not provide a good protective effect. When the length of the protective member 200 is greater than 4mm, the protective member 200 will be larger in size, thereby wasting too much material and resulting in excessive cost. At the same time, the excessive length of the protective member 200 will cause the protective member 200 to damage the battery cell 300. Specifically, the following is explained through experimental data. Prepare a number of identical bare cells 300 and housings 100, with the lengths of the protective members 200 being 0.95mm, 1mm, 1.55mm, 1.95mm, 2.35mm, 2.75mm, 3.15mm, 3.55mm, 3.65mm, and 4mm, respectively. Afterwards, install the protective members 200 of different sizes in the housing 100, and then fully charge the cell 300, and perform a directional drop test (when dropping, drop the six faces and four corners of the battery 10 from a height of one meter toward the marble floor, which is one round of testing) until the drop fails. If there is no failure after 5 rounds, it passes. For details, please refer to Tables 1 and 2 below.

[0046]

[0047]

[0048] Table 1

[0049] Comparative Example 1 1 round failure Comparative Example 2 2 rounds of failure Comparative Example 3 2 rounds of failure Example 1 7 rounds of failure Example 2 6 rounds of failure Example 3 6 rounds of failure Example 4 7 rounds of failure Example 5 6 rounds of failure Example 6 6 rounds of failure Example 7 6 rounds of failure Example 8 6 rounds of failure

[0050] Table 2

[0051] To summarize the above table, the standard for directional drop is 5 rounds of passing, so Examples 1, 2, 3, 4, 5, 6, 7 and 8 can all pass the test; in Comparative Example 1, due to the lack of the design of the protective member 200, the tab is easily touched by the housing 100 to cause a short circuit. In Comparative Example 2, since the protective member 200 is too short, after falling, the protective member 200 cannot effectively protect the positive tab, and the short circuit causes failure. In Comparative Example 3, since the protective member 200 is too long, the cost is too high and the battery cell 300 is damaged.

[0052] Furthermore, the length of the protective member 200 is limited as described above, so that the protective member 200 has a better protective effect. Among them, in the process of installing the protective member 200 to the housing 100, whether the protective member 200 is easy to install or not 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. Among them, when the length of the protective member 200 is less than 1.55mm, it will cause the protective member 200 to be more difficult to install, resulting in a lower installation rate. 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, but the length of the protective member 200 is still too large, so the protective member 200 occupies too much space inside the housing 100, resulting in a smaller size of the battery cell 300 in 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. The following is an experimental explanation, and the details can be referred to the following table.

[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 more convenient it is to install. Among them, the length of the protective member 200 should not exceed 3.55 mm, because this will result in a lower energy density of the battery 10.

[0056] Further, in some embodiments, the main body 210 has a first cavity, the protrusion 220 has a second cavity, and the first cavity and the second cavity are connected. Specifically, the way in which the main body 210 is provided with the first cavity and the protrusion 220 is provided with the second cavity can make the protective member 200 a hollow structure. On the one hand, after the main body 210 is provided with the first cavity and the protrusion 220 is provided with the second cavity, the weight of the protective member 200 can be reduced, thereby indirectly reducing the weight of the battery 10, which can make the battery 10 have the characteristics of lightweight. On the other hand, after the main body 210 is provided with the first cavity and the protrusion 220 is provided with the second cavity, this can make the protective member 200 have good elasticity while having good support, which can make the protective member 200 deform when it is impacted, and effectively prevent the protective member 200 from damaging the battery cell 300.

[0057] Furthermore, there are two ways for the main body 210 of the protective member 200 to abut against the battery cell 300. One way is that the protective member 200 is sleeved on the main body, and the other way is that the protective member 200 is not sleeved on the main body. The first way is described below. In some embodiments, part of the battery cell 300 is arranged in the first cavity. Specifically, the specific way in which the protective member 200 is sleeved on the main body is that the first cavity is sleeved on the main body, wherein such a setting can reduce the volume occupied by the protective member 200 in the housing 100, so that the battery cell 300 has more volume, thereby making the battery 10 have a higher energy density.

[0058] The second method is described below. In some embodiments, along the thickness direction of the protective member 200, the projection of the main body 210 falls on the projection of the main body. Specifically, in this method, the cross-sectional area of ​​the protective member 200 is smaller than the cross-sectional area of ​​the main body, and one end of the main body 210 abuts against the main body. Among them, the arrangement of the end of the main body 210 that is away from the protrusion 220 abutting against the main body can effectively avoid the problem of excessive thickness of the battery cell 300. Specifically, after the protective member 200 is sleeved on the main body, the final thickness of the battery cell 300 is the thickness of the protective member 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 protective member 200 is L1, 50μm≤L1≤500μm. For example, the thickness of the protective member 200 may be 50μm, 60μm, 100μm, 200μm, 300μm or 500μm. When the thickness of the protective member 200 is less than 50μm, due to the thin thickness of the protective member 200, it will lead to greater processing difficulty, resulting in excessively high manufacturing cost of the protective member 200. At the same time, the thin thickness of the protective member 200 will lead to poor supporting capacity of the protective member 200, and it will not have a good buffering effect. When the thickness of the protective member 200 is greater than 500μm, due to the large thickness of the protective member 200, this will also lead to greater difficulty in manufacturing the protective member 200. In addition, the large thickness of the protective member 200 will also cause additional material waste.

[0060] Specifically, the protrusion 220 can abut against the first surface 120, so as to effectively withstand the impact force. It is conceivable that in order to make the buffering ability of the protrusion 220 better, a plurality of protrusions 220 can be provided. Figure 1In some embodiments, a plurality of protrusions 220 are provided, and the plurality of protrusions 220 are arranged at intervals along the length direction of the main body 210. Specifically, there may be two, three or four protrusions 220, and the two protrusions 220 are respectively abutted against the two ends of the first surface 120, so that the protrusions 220 have a better buffering effect and protect the tabs from being damaged. In addition, the plurality of protrusions 220 can have a larger contact area with the first surface 120, which can effectively share the impact force received by various positions 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, which can be deformed within a certain range and return to its original state 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 show certain elastic properties. Thermoplastic elastomer (TPE) has both the high elasticity of traditional cross-linked vulcanized rubber and the characteristics of convenient processing of ordinary plastics. Its elastic properties are significant, and it can be freely deformed within a certain range and return to its original state. Polyphenylene sulfide (PPS) also has a certain elasticity. Specifically, when the material of the protective member 200 is one of the above materials, the protective member 200 has good elasticity, so the protective member 200 can withstand the impact force caused by the movement of the main body, thereby buffering and effectively protecting the tab. In addition, the above materials are all resistant to high temperatures. Since the battery cell 300 generates heat during charging and discharging, the high temperature resistance can also prolong 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 when dropped, causing damage to the battery cell 300. The Shore hardness of the protective member 200 may be 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees or 90 degrees.

[0063] Further, 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 3In some embodiments, the protrusion 220 has a contact surface 221, and the contact surface 221 contacts the first surface 120. Specifically, the contact surface 221 may be a plane, and the first surface 120 is also a plane. When the planes contact each other, there is a large contact area between the protrusion 220 and the first surface 120, which can make the protrusion 220 evenly disperse the impact force from the main body.

[0064] Furthermore, it is conceivable that the protective member 200 needs to be provided with a groove 230 to leave space, so as to facilitate the welding of the pole lug and the pole by the staff. Specifically, the groove 230 can be formed by defining the two protrusions 220 and the body 210. That is, please refer to Figure 2 and Figure 3 In some embodiments, two protrusions 220 are provided, and the two protrusions 220 and the main body 210 jointly define a groove 230, and part of the pole ear is provided in the groove 230. Among them, a through hole is provided at the groove 230, and the through hole can allow the pole ear to pass through, and the pole ear is welded to the pole column after passing through. The welding of the pole ear and the pole column can be direct welding or indirect welding, and the indirect welding method is to weld the pole ear and the pole column respectively through a connecting piece. When the pole ear and the pole column are respectively connected by the connecting piece, the width of the connecting piece is greater than the width of the groove 230. In addition, the two protrusions 220 can all abut on the first surface 120, which can enable the protective member 200 to evenly share the impact force from the main body. It is conceivable that another through hole can be provided on the protrusion 220 for the negative pole ear to pass through.

[0065] For further information, please refer to Figure 5 In some embodiments, the housing 100 further includes a third surface 140, a fourth surface 150, a first chamfered surface 160, and a second chamfered surface 170. The third surface 140 and the fourth surface 150 are arranged opposite to each other, and the two ends of the first chamfered surface 160 are respectively connected to the third surface 140 and the first surface 120, and the two ends of the second chamfered surface 170 are respectively connected to the fourth surface 150 and the first surface 120. Specifically, the first chamfered surface 160 can be formed after chamfering the connection between the first surface 120 and the third surface 140, and the second chamfered surface 170 can be formed after chamfering the connection between the second surface 130 and the fourth surface 150. The arrangement of the first chamfered surface 160 and the second chamfered surface 170 can make the housing 100 more rounded and effectively prevent the housing 100 from hurting the user. In addition, the arrangement of the first chamfered surface 160 and the second chamfered surface 170 can also facilitate the staff to process and manufacture the housing 100.

[0066] Further, in some embodiments, the radius of the first chamfered surface 160 is L2, and the connection between the main body 210 and the protrusion 220 has a chamfered portion 240, and the radius of the chamfered portion 240 is L3, 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 chamfered portion 240 and the radius of the first chamfered surface 160 is less than 0.1mm, this will cause the force to be concentrated at this position, and the shell 100 will be damaged when the battery 10 falls. When the difference between the radius of the chamfered portion 240 and the radius of the first chamfered surface 160 is greater than 2mm, due to the large difference between the radius of the chamfered portion 240 and the radius of the first chamfered surface 160, the protective member 200 and the shell 100 will have a poor fit, and the protective member 200 is easy to shake in the shell 100.

[0067] For further information, please refer to Figure 3 In some embodiments, the size of the protrusion 220 in the length direction of the battery cell 300 is L4, and L4 ≥ 0.1 mm. L4 can be 0.2 mm, 0.3 mm, 0.4 mm, etc. If L4 is less than 0.1 mm, the size of the protrusion 220 will be small, and thus a good buffer distance cannot be provided to effectively protect the tab.

[0068] For further information, please refer to Figure 4 , the protective member 200 is also provided with a tab hole 260, and along the thickness direction of the battery 10, the distance between the tab hole 260 and the edge of the protective member 200 is L5, 0.2mm≤L5≤2mm. Specifically, two tab holes 260 may be provided, one for the positive tab and the other for the negative tab to pass through. The distance between the tab hole 260 and the edge of the protective member 200 may specifically be: the distance between the tab hole 260 and the edge of the protective member 200 in the thickness direction of the battery 10. Among them, the tab hole 260 may be provided on the protrusion 220 or the main body 210. When L5 is less than 0.2mm, when the positive tab passes through the tab hole 260, since the tab hole 260 is relatively close to the edge of the protective member 200, the positive tab may contact the housing 100. When L5 is greater than 2mm, the middle position of the tab hole 260 and the protective member 200 will deviate too much, making it inconvenient to weld the positive tab and the pole column later.

[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 between 0.3 mm. 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 surface 120 of the shell 100 is also provided with an injection hole, wherein the injection hole is used to inject electrolyte into the storage cavity 110. When the electrolyte is injected from the shell 100 into the storage cavity 110, a liquid hole 250 can be provided on the main body 210 or the protrusion 220 to facilitate the injection, so as to facilitate the entry of the electrolyte. The shape of the liquid hole 250 can be elliptical or circular. When the liquid hole 250 is circular, the diameter of the liquid hole 250 is greater than the diameter of the injection hole. The diameter of the injection hole can be 1mm-2mm, and the diameter of the liquid hole 250 can be 2.5mm-3mm. When the liquid hole 250 is elliptical, along the length direction of the battery cell 300, the projection of the injection hole falls within the projection range of the liquid hole 250.

[0071] Furthermore, in some embodiments, the protective member 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, the width of the tab is L7, and 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 lead to greater processing difficulty. If the difference between the length of the tab hole 260 and the width of the tab is greater than 3mm, then due to the excessive size of the tab hole 260, the strength of the protective member 200 will be reduced.

[0072] In some embodiments, the electronic device includes the battery 10 of any one of the above embodiments. Specifically, one side of the battery cell 300 abuts against the second surface 130 of the shell 100, the other side of the battery cell 300 abuts against the main body 210, and the protrusion 220 abuts against the first surface 120. In this way, the two sides of the battery cell 300 can be directly or indirectly abutted against the shell 100 through the protective member 200. When the battery 10 is mechanically tested, such as a drop test, the space for the battery cell 300 to move 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 a higher safety. Furthermore, the electronic device having the battery 10 has better safety.

[0073] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery, characterized in that include: A housing having a storage cavity, the housing comprising a first surface and a second surface opposite to each other; A pole connected to the first surface, with one end of the pole protruding relative to the shell; A cover plate connected to the housing; A battery cell is arranged in the storage cavity, the battery cell comprises a main body and a pole ear, two ends of the pole ear are respectively connected to the main body and the pole, and a side of the main body away from the pole ear abuts against the second surface; A protective member is arranged between the first surface and the battery cell, and 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 abuts against the battery cell, and the protruding portion abuts against the first surface.

2. The battery according to claim 1, characterized in that Along the length direction of the battery core, the length of the protective member is B1, 1mm≤B1≤4mm.

3. The battery according to claim 2, characterized in that Along the length direction of the battery core, the length of the protective member is B1, 1.55mm≤B1≤3.55mm.

4. The battery according to claim 1 or 3, characterized in that: The main body has a first cavity, the protruding portion has a second cavity, and the first cavity and the second cavity are communicated.

5. The battery according to claim 4, characterized in that Along the thickness direction of the protection member, the projection of the main body portion falls on the projection of the main body.

6. The battery according to claim 4, characterized in that The thickness of the protective member is L1, 50 μm≤L1≤500 μm.

7. The battery according to claim 1, characterized in that The protrusions are provided in plurality, and are arranged at intervals along the length direction of the main body.

8. The battery according to claim 1, characterized in that The material of the protective component is one of polyetheretherketone, polyimide, polyetheretherketone composite material, thermoplastic elastomer and polyphenylene sulfide.

9. The battery according to claim 1, characterized in that The Shore hardness of the material of the protective member is ≤90 degrees.

10. The battery according to claim 1, characterized in that The protrusion has a contact surface, and the contact surface contacts the first surface.

11. The battery according to claim 1, characterized in that The two protrusions are provided, and the two protrusions and the main body together define a groove, and part of the pole ear is arranged in the groove.

12. The battery according to claim 1, characterized in that The shell also includes a third surface, a fourth surface, a first chamfered surface and a second chamfered surface, the third surface and the fourth surface are arranged opposite to each other, the two ends of the first chamfered surface are respectively connected to the third surface and the first surface, and the two ends of the second chamfered surface are respectively connected to the fourth surface and the first surface.

13. The battery according to claim 12, characterized in that The radius of the first chamfered surface is L2, and a chamfered portion is provided at a connection between the main body portion and the protruding portion. The radius of the chamfered portion is L3, and 0.1 mm ≤ L2 - L3 ≤ 2 mm.

14. The battery according to claim 1, characterized in that The dimension of the protrusion in the length direction of the battery core is L4, and L4≥0.1 mm.

15. The battery according to claim 1, characterized in that The protective member is further provided with a tab hole, and along the thickness direction of the battery, the distance between the tab hole and the edge of the protective member is L5, 0.2mm≤L5≤2mm.

16. An electronic device, characterized in that Comprising a battery as claimed in any one of claims 1 to 15.

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