Battery and electronic device

Abstract

Disclosed in the present invention is a battery, comprising: a housing provided with a storage cavity, the housing comprising a first surface and a second surface which are opposite to each other; poles connected to the first surface, one end of each pole protruding relative to the housing; a cover plate connected to the housing; a battery cell arranged in the storage cavity, the battery cell comprising a main body and tabs, two ends of each tab being respectively connected to the main body and the corresponding pole, and the side of the main body away from the tabs abutting against the second surface; and a protecting member arranged between the first surface and the battery cell, the protecting 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 surface. The battery of the present invention has high safety.

Description

Batteries and electronic devices Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery and an electronic device. Background Technology

[0002] In related technologies, for steel-cased batteries, after the battery cell is placed in the casing, the tabs need to be connected to the terminals to achieve conductivity between the cell and the outside environment. The battery requires mechanical testing to assess its performance and safety. Mechanical tests include drop tests, vibration tests, and compression tests. Because there is a gap between the side of the battery cell with the tabs and the casing, during mechanical testing, the battery is prone to the cell pulling on the tabs, causing them to tear, break, or short-circuit, thus leading to battery failure.

[0003] Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a battery that can have high safety.

[0005] The present invention also proposes an electronic device.

[0006] A battery according to a first aspect embodiment of the present invention comprises:

[0007] A housing having a storage cavity, the housing including opposing first and second surfaces;

[0008] A pole post is connected to the first surface, and one end of the pole post protrudes relative to the housing;

[0009] Cover plate, connected to the housing;

[0010] A battery cell is disposed in the storage cavity. The battery cell includes a body and a tab. The two ends of the tab are respectively connected to the body and the terminal post. The side of the body away from the tab abuts against the second surface.

[0011] A protective component is disposed between the first surface and the battery cell. The protective component includes a body portion and a protrusion portion. The protrusion portion is connected to the body portion and protrudes relative to the body portion. The body portion abuts against the battery cell, and the protrusion portion abuts against the first surface.

[0012] The battery according to embodiments of the present invention has at least the following beneficial effects: one side of the battery cell abuts against the second surface of the casing, the other side of the battery cell abuts against the main body, and the protrusion abuts against the first surface. Thus, the protective component allows both sides of the battery cell to directly or indirectly abut against the casing. When the battery undergoes mechanical testing, such as a drop test, the space for the battery cell to move within the casing is restricted, which effectively prevents the tabs from being torn by the main body. Specifically, the battery exhibits high safety.

[0013] According to some embodiments of the battery of the present invention, the length of the protective member along the length direction of the cell is B1, where 1mm≤B1≤4mm.

[0014] According to some embodiments of the battery of the present invention, the length of the protective member along the length direction of the cell is B1, where 1.55mm≤B1≤3.55mm.

[0015] According to some embodiments of the battery of the present invention, the body portion has a first cavity, the protrusion portion has a second cavity, and the first cavity and the second cavity are in communication.

[0016] According to some embodiments of the battery, along the thickness direction of the protective member, the projection of the body portion falls on the projection of the main body.

[0017] According to some embodiments of the battery, the thickness of the protective element is L1, where 50μm≤L1≤500μm.

[0018] According to some embodiments of the battery of the present invention, a plurality of protrusions are provided, and the plurality of protrusions are spaced apart along the length direction of the main body.

[0019] According to some embodiments of the battery, the protective component is made of one of the following materials: polyetheretherketone, polyimide, polyetheretherketone composite material, thermoplastic elastomer, and polyphenylene sulfide.

[0020] According to some embodiments of the battery, the material of the protective component has a Shore hardness of ≤90 degrees.

[0021] According to some embodiments of the battery of the present invention, the protrusion has an abutting surface that abuts against the first surface.

[0022] According to some embodiments of the battery, two protrusions are provided, and the two protrusions together with the body portion define a groove, with a portion of the tabs disposed in the groove.

[0023] According to some embodiments of the present invention, the battery casing further includes a third surface, a fourth surface, a first chamfered surface, and a second chamfered surface, wherein the third surface and the fourth surface are disposed 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.

[0024] According to some embodiments of the battery of the present invention, the radius of the first chamfered surface is L2, and the connection between the body part and the protrusion has a chamfered portion with a radius of L3, where 0.1mm≤L2-L3≤2mm.

[0025] According to some embodiments of the battery, the protrusion has a dimension L4 in the length direction of the cell, where L4 ≥ 0.1 mm.

[0026] According to some embodiments of the battery of the present invention, the protective member is further provided with a tab hole, and the distance between the tab hole and the edge of the protective member along the thickness direction of the battery is L5, 0.2mm≤L5≤2mm.

[0027] An electronic device according to a second aspect of the present invention includes the battery described in any one of the first aspect embodiments.

[0028] The electronic device according to embodiments of the present invention has at least the following beneficial effects: one side of the battery cell abuts against the second surface of the casing, the other side of the battery cell abuts against the main body, and the protrusion abuts against the first surface. Thus, the protective member allows both sides of the battery cell to directly or indirectly abut against the casing. When the battery undergoes mechanical testing, such as a drop test, the space for the battery cell to move within the casing is restricted, which effectively prevents the tabs from being torn by the main body. Specifically, the battery can have high safety. Furthermore, the electronic device with this battery has good safety.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0031] Figure 1 is a schematic diagram of the protective component in the battery according to the first embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of the protective component in the battery according to the second embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of the protective component in the battery according to the third embodiment of the present invention;

[0034] Figure 4 is a schematic diagram of the protective component in the battery according to the fourth embodiment of the present invention.

[0035] Figure 5 is a schematic diagram of a battery according to some embodiments of the present invention.

[0036] Figure label:

[0037] Battery 10, casing 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 component 200, body part 210, protrusion 220, abutment surface 221, groove 230, chamfered part 240, liquid passage hole 250, electrode hole 260, and battery cell 300. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0040] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0041] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0042] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Referring to Figures 1 to 5, in some embodiments, the battery 10 includes: a housing 100, terminals, a cover plate, a cell 300, and a protective element 200. The housing 100 has a storage cavity 110 and includes opposing first surfaces 120 and 130. The housing 100 may be rectangular in shape. The housing 100 includes opposing first surfaces 120 and 130, opposing third surfaces 140 and 150, and a fifth surface. The first surface 120, second surface 130, third surface 140, and fourth surface 150 are all connected to the fifth surface, thereby forming the storage cavity 110. After the cover plate is attached to the housing 100, the cover plate closes the opening of the storage cavity 110. It should be noted that after the cover plate is attached to the storage cavity 110, the cover plate becomes the sixth surface of the housing 100. Both the fifth and sixth surfaces are the surfaces with the largest area in the housing 100. The electrode post is connected to the first surface 120, and one end of the electrode post protrudes relative to the housing 100 (not shown in the figure). The electrode post may include a positive electrode post and a negative electrode post, which can serve to connect the battery cell 300 to the outside. A 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 battery cell 300 is disposed in the storage cavity 110. The battery cell 300 includes a body and a tab, the two ends of the tab are connected to the body and the electrode post respectively, and the side of the body away from the tab abuts against the second surface 130. The protective component 200 is disposed between the first surface 120 and the battery cell 300. The protective component 200 includes a body portion 210 and a protrusion portion 220. The protrusion portion 220 is connected to the body portion 210 and protrudes relative to the body portion 210. The body portion 210 abuts against the battery cell 300, and the protrusion portion 220 abuts against the first surface 120.

[0044] Specifically, please refer to Figure 5. In Figure 5, for ease of viewing the cell 300, protective element 200, and housing 100, the cell 300 is not in contact with the protective element 200 or the housing 100. One side of the cell 300 abuts against the second surface 130 of the housing 100, and the other side of the cell 300 abuts against the body portion 210. The protrusion 220 abuts against the first surface 120. Thus, the protective element 200 allows both sides of the cell 300 to directly or indirectly abut against the housing 100. When the battery 10 undergoes mechanical testing, such as a drop test, the space for the cell 300 to move within the housing 100 is restricted, which effectively prevents the tabs from being torn by the body. Specifically, the battery 10 has a high level of safety.

[0045] 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 casing 100 to facilitate the welding of the tabs and terminals. After the tabs and terminals are welded, due to the gap between the battery cell 300 and the casing 100, when the battery 10 is dropped, the main body of the battery cell 300 will move in the storage cavity 110, thereby pulling on the tabs and causing the tabs to tear or break the connection between the tabs and terminals. In this application, after the protective member 200 is provided, a large gap between the main body of the battery cell 300 and the casing 100 can be effectively avoided. Furthermore, the arrangement of the main body 210 of the protective member 200 abutting against the battery cell 300 and the protrusion 220 abutting against the first surface 120 can effectively prevent the main body of the battery cell 300 from moving in the storage cavity 110, thereby preventing damage to the tabs. Furthermore, during mechanical testing of the battery 10, the protective component 200 can withstand most of the impact force, effectively preventing damage to the main body of the cell 300 after contact with the casing 100. Additionally, the protective component 200 can be made of insulating material, thus effectively preventing short circuits in the battery 10.

[0046] Further, referring to Figure 3, in some embodiments, the length of the protective element 200 along the length direction of the cell 300 is B1, where 1mm ≤ B1 ≤ 4mm. Specifically, the length of the protective element 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 protective element 200 is less than 1mm, the drop resistance of the battery 10 is poor, and the protective element 200 cannot provide adequate protection. When the length of the protective element 200 is greater than 4mm, the protective element 200 becomes too large, wasting excessive material and leading to excessively high costs. Furthermore, an excessively long protective element 200 can damage the cell 300. This will be further illustrated below with experimental data. Prepare several identical bare battery cells 300 and housings 100. The lengths of the protective components 200 are 0.95mm, 1mm, 1.55mm, 1.95mm, 2.35mm, 2.75mm, 3.15mm, 3.55mm, 3.65mm, and 4mm, respectively. Then, install the protective components 200 of different sizes into the housings 100. Next, fully charge the battery cells 300 and perform directional drop tests (dropping each of the six sides and four corners of the battery 10 from a height of one meter onto a marble floor constitutes one round of testing) until failure occurs. If no failure occurs after 5 rounds, the test is considered passed. See Tables 1 and 2 below for details.

[0047] Table 1

[0048] Table 2

[0049] Summarizing the above table, the standard for directional drop testing is passing 5 rounds. Therefore, Examples 1, 2, 3, 4, 5, 6, 7, and 8 all passed the test. In Comparative Example 1, the lack of a protective element 200 caused the tab to easily contact the casing 100, leading to a short circuit. In Comparative Example 2, the protective element 200 was too short, failing to effectively protect the positive tab after a drop, resulting in a short circuit and failure. In Comparative Example 3, the protective element 200 was too long, leading to excessive cost and damage to the battery cell 300.

[0050] Furthermore, the length of the protective component 200 is limited to ensure better protection. During the installation of the protective component 200 into the housing 100, the ease of installation affects the efficiency of the installation work. To facilitate installation, the length of the protective component 200 can be further limited. Specifically, in some embodiments, the length of the protective component 200 along the length direction of the battery cell 300 is B1, where 1.55mm ≤ B1 ≤ 3.55mm. Specifically, the length of the protective component 200 can be 1.55mm, 1.95mm, 2.0mm, 2.35mm, 2.5mm, 2.75mm, 3.15mm, or 3.55mm. When the length of the protective component 200 is less than 1.55mm, installation becomes more difficult, resulting in a lower installation success rate. When the length of the protective component 200 exceeds 3.55mm, its installation is relatively easy. However, the length of the protective component 200 is still too large, resulting in it occupying too much space inside the housing 100. This leads to a smaller size of the battery cell 300 within the housing 100 and a lower energy density for the battery 10. In other words, the protective component 200 is easy to install, but the energy density of the battery 10 is lower. The following experiment illustrates this; please refer to the table below for details.

[0051] Table 3

[0052] In summary, when the length of the protective component 200 is greater than 1.55mm, the longer the protective component 200, the easier it is to install. However, the length of the protective component 200 should not exceed 3.55mm, as this would result in a lower energy density for the battery 10.

[0053] Furthermore, in some embodiments, the body portion 210 has a first cavity, and the protrusion 220 has a second cavity, with the first and second cavities communicating with each other. Specifically, the arrangement of the first cavity in the body portion 210 and the second cavity in the protrusion 220 allows the protective member 200 to become a hollow structure. Firstly, by providing the first cavity in the body portion 210 and the second cavity in the protrusion 220, the weight of the protective member 200 can be reduced, thereby indirectly reducing the weight of the battery 10, which makes the battery 10 lightweight. Secondly, by providing the first cavity in the body portion 210 and the second cavity in the protrusion 220, the protective member 200 can have both good support and good elasticity, allowing it to deform upon impact and effectively preventing damage to the battery cell 300.

[0054] Furthermore, the protective member 200's body portion 210 abuts against the battery cell 300 in two ways: one is that the protective member 200 is fitted onto the body, and the other is that the protective member 200 is not fitted onto the body. The first method is described below. In some embodiments, a portion of the battery cell 300 is disposed within the first cavity. Specifically, the protective member 200 is fitted onto the body in such a way that the first cavity is fitted onto the body. This arrangement reduces the volume occupied by the protective member 200 within the housing 100, allowing the battery cell 300 to have more volume, thereby enabling the battery 10 to have a higher energy density.

[0055] The second method is described below. In some embodiments, the projection of the body portion 210 falls on the projection of the main body along the thickness direction of the protective member 200. 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 body portion 210 abuts against the main body. The arrangement where the end of the body portion 210 facing away from the protrusion 220 abuts against the main body effectively avoids the problem of excessive thickness of the battery cell 300. Specifically, after the protective member 200 is fitted onto 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. This increases the final thickness of the battery 10, resulting in a lower energy density of the battery 10.

[0056] Furthermore, in some embodiments, the thickness of the protective element 200 is L1, where 50μm ≤ L1 ≤ 500μm. For example, the thickness of the protective element 200 can be 50μm, 60μm, 100μm, 200μm, 300μm, or 500μm. When the thickness of the protective element 200 is less than 50μm, the thinner thickness leads to greater processing difficulty, resulting in excessively high manufacturing costs. Simultaneously, the thinner thickness of the protective element 200 results in poorer support capacity, failing to provide adequate cushioning. When the thickness of the protective element 200 is greater than 500μm, the larger thickness also increases the manufacturing difficulty. Additionally, the larger thickness of the protective element 200 causes further material waste.

[0057] Specifically, the protrusion 220 can abut against the first surface 120, thereby effectively withstanding impact forces. It is conceivable that to improve the cushioning capacity of the protrusion 220, multiple protrusions 220 can be provided. Therefore, referring to Figure 1, in some embodiments, multiple protrusions 220 are provided, spaced apart along the length of the body portion 210. Specifically, there can be two, three, or four protrusions 220, with two protrusions 220 abutting against both ends of the first surface 120 respectively, thus providing a better cushioning effect and protecting the tabs from damage. Furthermore, multiple protrusions 220 can have a larger contact area with the first surface 120, which can effectively distribute the impact forces received by different parts of the body.

[0058] Furthermore, in some embodiments, the protective component 200 is made of one of the following materials: polyetheretherketone (PEEK), polyimide, PEEK composite material, thermoplastic elastomer, and polyphenylene sulfide (PPS). PEEK is a high-performance thermoplastic material with a certain degree of elasticity, capable of deformation within a certain range and returning to its original shape after the external force is removed. Polyimide (PI) is a special engineering material with excellent high-temperature resistance. PEEK composite materials use PEEK resin as the matrix and are reinforced by adding other materials (such as fibers). Since the matrix material PEEK itself has a certain degree of elasticity, the composite material also exhibits certain elastic properties. Thermoplastic elastomers (TPE) possess both the high elasticity of traditional cross-linked vulcanized rubber and the ease of processing of ordinary plastics. Its elastic properties are significant, allowing it to deform freely within a certain range and return to its original shape. Polyphenylene sulfide (PPS) also has a certain degree of elasticity. Specifically, when the protective component 200 is made of one of the aforementioned materials, it possesses good elasticity. Therefore, the protective component 200 can withstand the impact force generated during the movement of the main body, thus providing cushioning and effectively protecting the electrode tabs. Furthermore, all of the aforementioned materials are heat-resistant. Since the battery cell 300 generates heat during charging and discharging, this heat-resistant property also extends the service life of the protective component 200.

[0059] Furthermore, the Shore hardness of the protective component 200 is ≤90 degrees. If the Shore hardness of the protective component 200 is greater than 90 degrees, then during a drop, the excessive hardness of the protective component 200 may cause it to puncture the battery cell 300, resulting in damage to the battery cell 300. The Shore hardness of the protective component 200 can be 30, 40, 50, 60, 70, 80, or 90 degrees.

[0060] Furthermore, when the protrusion 220 abuts against the first surface 120, the protrusion 220 can make line-to-surface contact with the first surface 120 (as shown in Figure 1), that is, the shape of the protrusion 220 is circular. The protrusion 220 can also make surface-to-surface contact with the first surface 120 (as shown in Figure 3), where the surface of the protrusion 220 is planar. Specifically, referring to Figure 3, in some embodiments, the protrusion 220 has an abutting surface 221 that abuts against the first surface 120. Specifically, the abutting surface 221 can be planar, and the first surface 120 is also planar. When planar surfaces abut against each other, there is a large contact area between the protrusion 220 and the first surface 120, which allows the protrusion 220 to evenly distribute the impact force from the main body.

[0061] Furthermore, it is conceivable that the protective component 200 needs to be provided with a groove 230 to provide space for workers to weld the tabs and poles. Specifically, the groove 230 can be formed by defining it with two protrusions 220 and the body portion 210. That is, referring to Figures 2 and 3, in some embodiments, two protrusions 220 are provided, and the two protrusions 220 and the body portion 210 together define the groove 230, with part of the tab disposed in the groove 230. The groove 230 has a through hole for the tab to pass through, and after passing through, the tab is welded to the pole. The welding of the tab and pole can be direct welding or indirect welding. Indirect welding is achieved by welding the tab and pole separately using a connecting piece. When the tab and pole are connected separately using the connecting piece, the width of the connecting piece is greater than the width of the groove 230. In addition, both protrusions 220 can abut against the first surface 120, which allows the protective component 200 to evenly distribute the impact force from the body. It is conceivable that additional through holes could be provided on the protrusion 220 for the negative electrode tab to pass through.

[0062] Further, referring 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. 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 is formed after chamfering at the junction of the first surface 120 and the third surface 140, and the second chamfered surface 170 is formed after chamfering at the junction of the second surface 130 and the fourth surface 150. The arrangement of the first chamfered surface 160 and the second chamfered surface 170 makes the housing 100 more rounded, effectively preventing the housing 100 from injuring the user. In addition, the arrangement of the first chamfered surface 160 and the second chamfered surface 170 also facilitates the processing and manufacturing of the housing 100 by workers.

[0063] Furthermore, in some embodiments, the radius of the first chamfered surface 160 is L2, and the connection between the body portion 210 and the protrusion 220 has a chamfered portion 240 with a radius of L3, where 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 stress concentration at that location, resulting in damage to the housing 100 when the battery 10 is dropped. When the difference between the radius of the chamfered portion 240 and the radius of the first chamfered surface 160 is greater than 2mm, the large difference between the radius of the chamfered portion 240 and the first chamfered surface 160 will result in poor fit between the protective member 200 and the housing 100, making the protective member 200 prone to wobbling within the housing 100.

[0064] Further, referring to Figure 3, in some embodiments, the protrusion 220 has a dimension L4 along the length of the cell 300, where 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 protrusion 220 will be too small, thus failing to provide a good buffer distance and effectively protect the tab.

[0065] Further, referring to Figure 4, the protective member 200 is also provided with a tab hole 260. 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, where 0.2mm ≤ L5 ≤ 2mm. Specifically, two tab holes 260 can be provided, for the positive and negative tabs to pass through respectively. The distance between the tab hole 260 and the edge of the protective member 200 can be the closest distance between the tab hole 260 and the edge of the protective member 200 in the thickness direction of the battery 10. The tab hole 260 can be provided on the protrusion 220 or the body portion 210. When L5 is less than 0.2mm, when the positive tab passes through the tab hole 260, because 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, it will cause the center position of the tab hole 260 and the protective component 200 to deviate too much, making it inconvenient to weld the positive electrode tab and the electrode post later.

[0066] Furthermore, 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 within 0.3 mm. If the length of the body portion 210 is too large, the body portion 210 will not be able to be placed into the storage cavity 110.

[0067] Furthermore, in some embodiments, the first surface 120 of the housing 100 is also provided with an injection hole, which is used to inject electrolyte into the storage cavity 110. When electrolyte is injected from the housing 100 into the storage cavity 110, a liquid passage hole 250 can be provided on the body portion 210 or the protrusion 220 to facilitate electrolyte entry. The shape of the liquid passage hole 250 can be elliptical or circular. When the liquid passage hole 250 is circular, its diameter is larger than that of the injection hole. The diameter of the injection hole can be 1mm-2mm, and the diameter of the liquid passage hole 250 can be 2.5mm-3mm. When the liquid passage hole 250 is elliptical, the projection of the injection hole falls within the projection range of the liquid passage hole 250 along the length direction of the cell 300.

[0068] Furthermore, in some embodiments, the protective component 200 is provided with a tab hole 260 to allow the tab to pass through. The length of the tab hole 260 is greater than the width of the tab, which facilitates the tab passing through the tab hole 260. Specifically, the length of the tab hole 260 is L6, and the width of the tab is L7, where 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 0.8mm, 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, the strength of the protective component 200 will be reduced because the tab hole 260 is too large.

[0069] In some embodiments, the electronic device includes a battery 10 as described in any of the above embodiments. Specifically, one side of the battery cell 300 abuts against the second surface 130 of the housing 100, the other side of the battery cell 300 abuts against the body portion 210, and the protrusion 220 abuts against the first surface 120. Thus, the protective member 200 allows both sides of the battery cell 300 to directly or indirectly abut against the housing 100. When the battery 10 is subjected to mechanical testing, such as a drop test, the space for movement of the battery cell 300 within the housing 100 is restricted, which effectively prevents the tabs from being torn by the body. Specifically, the battery 10 can have high safety. Furthermore, the electronic device having this battery 10 has good safety.

[0070] 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, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A battery, characterized in that, include: A housing having a storage cavity, the housing including opposing first and second surfaces; A pole post is connected to the first surface, and one end of the pole post protrudes relative to the housing; Cover plate, connected to the housing; A battery cell is disposed in the storage cavity. The battery cell includes a body and a tab. The two ends of the tab are respectively connected to the body and the terminal post. The side of the body away from the tab abuts against the second surface. A protective component is disposed between the first surface and the battery cell. The protective component includes a body portion and a protrusion portion. The protrusion portion is connected to the body portion and protrudes relative to the body portion. The body portion abuts against the battery cell, and the protrusion portion abuts against the first surface.

2. The battery according to claim 1, characterized in that, Along the length of the battery cell, the length of the protective component is B1, where 1mm ≤ B1 ≤ 4mm.

3. The battery according to claim 2, characterized in that, Along the length of the battery cell, the length of the protective component is B1, where 1.55mm ≤ B1 ≤ 3.55mm.

4. The battery according to any one of claims 1 to 3, characterized in that, The main body has a first cavity, and the protrusion has a second cavity, the first cavity and the second cavity are connected.

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

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

7. The battery according to claim 1, characterized in that, The protrusions are provided in multiple ways, and are spaced apart along the length of the main body.

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

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

10. The battery according to claim 1, characterized in that, The protrusion has an abutting surface that abuts against the first surface.

11. The battery according to claim 1, characterized in that, The protrusion is provided in two parts, and the two protrusions together with the body part define a groove, and part of the electrode tab is disposed in the groove.

12. The battery according to claim 1, characterized in that, The housing 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. 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 the connection between the main body and the protrusion has a chamfered portion with a radius of L3, where 0.1mm≤L2-L3≤2mm.

14. The battery according to claim 1, characterized in that, The protrusion has a dimension of L4 along the length of the battery cell, where L4 ≥ 0.1 mm.

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

16. An electronic device, characterized in that, Includes the battery as described in any one of claims 1 to 15.

Images