Battery

Abstract

The present application provides a battery, which relates to the field of battery technology, and includes a shell and a battery cell located in the shell, and a pole ear is arranged on the battery cell. It also includes a connecting plate and a rivet member, one end of the connecting plate is connected to the pole ear, and the other end is connected to the shell through the rivet member. It also includes a rigid gasket, which is located between the nail cap of the rivet member and the connecting plate, and at least one side of the rigid gasket has a grid pattern. In this way, the friction between the rigid gasket and at least one of the rivet member or the connecting plate can be effectively increased, and the rigid gasket is tightly fitted with at least one of the rivet member or the connecting plate, which can effectively improve the firmness and reliability of the connection between the rivet member and the connecting plate, thereby effectively improving the reliability and stability of the connection between the connecting plate and the shell.

Description

Technical Field

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

[0002] Batteries are components that convert chemical energy into electrical energy. They are widely used in daily life and work. For example, lithium-ion batteries are often used in various electronic devices such as mobile phones, cameras, notebooks, and tablets to provide power for electronic devices. They play a very important role in people's lives and work.

[0003] Lithium-ion batteries usually include a shell and a battery cell located in the shell. The battery cell has a tab, which is usually electrically connected to the pole block on the shell through a connecting plate to conduct electrical energy to a substrate outside the shell. At present, the connecting plate and the shell are usually electrically connected through rivets, which are connected by riveting and biting the rivets. However, the biting force between the rivet and the connecting plate and the shell is limited, which reduces the firmness and reliability of the connection between the connecting plate and the shell. Utility Model Content

[0004] The present application provides a battery that can effectively improve the reliability and stability of the connection between a connecting plate and a shell.

[0005] The present application provides a battery, comprising a shell and a battery cell located in the shell, wherein the battery cell is provided with a tab;

[0006] It also includes a connecting plate and a rivet member, wherein the connecting plate is located in the shell, at least a portion of the rivet member is located in the shell, one end of the connecting plate is connected to the pole ear, and the other end is connected to the shell through the rivet member;

[0007] It also includes a rigid gasket, the rivet part includes a nail cap and a nail column, the nail column is penetrated on the connecting plate and the shell, the rigid gasket is located between the nail cap and the connecting plate, and at least one side of the rigid gasket has a grid pattern.

[0008] The embodiment of the present application arranges a rigid gasket between the rivet part and the connecting plate, and provides a grid pattern on at least one side of the rigid gasket, which can effectively increase the friction between the rigid gasket and at least one of the rivet part or the connecting plate. The rigid gasket is tightly fitted with at least one of the rivet part or the connecting plate, which can effectively improve the firmness and reliability of the connection between the rivet part and the connecting plate, thereby effectively improving the reliability and stability of the connection between the connecting plate and the shell.

[0009] In a possible implementation, both surfaces of the rigid gasket have grid patterns.

[0010] In a possible implementation, the grid pattern includes a plurality of evenly distributed grids, and the shape of the grids is rectangular, circular, elliptical or triangular.

[0011] In a possible implementation, the grid is in a rectangular shape, and a side length of the grid is 0.2 mm to 0.5 mm.

[0012] In a possible implementation, a pole block is further included, the pole block is located outside the shell, the nail column of the rivet member is also penetrated through the pole block, and the connecting plate is electrically connected to the pole block through the rivet member.

[0013] In a possible implementation, the housing includes a lower housing and a cover plate, the cover plate is covered on the lower housing, the cover plate and the lower housing are jointly surrounded to form a receiving cavity, and the battery cell and the connecting plate are both located in the receiving cavity;

[0014] The connecting plate is connected to the cover plate.

[0015] In a possible implementation, the electrode tab includes a positive electrode tab and a negative electrode tab, the connecting plate includes a positive connecting plate and a negative connecting plate, and the rivet member includes a positive rivet member and a negative rivet member;

[0016] The positive electrode connecting plate and the positive electrode rivet are electrically connected to the positive electrode tab, and the negative electrode connecting plate and the negative electrode rivet are electrically connected to the negative electrode tab.

[0017] In a possible implementation, the positive electrode connecting plate is an aluminum plate, and the positive electrode rivet member is an aluminum rivet.

[0018] In a possible implementation, the negative electrode connecting plate is a copper plate, and the negative electrode rivet member is a copper rivet.

[0019] In a possible implementation manner, one end of the nail column in the rivet component facing away from the nail cap further has a chamfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the present application;

[0022] Figure 2A schematic diagram of the structure of the connection between a connecting plate, a rivet member and a rigid gasket provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of the structure of the front side of a rigid gasket provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the structure of the back side of a rigid gasket provided in an embodiment of the present application;

[0025] Figure 5 for Figure 4 Enlarged view of area A in the middle;

[0026] Figure 6 A front view of a rivet provided in an embodiment of the present application;

[0027] Figure 7 A top view of a rivet provided in an embodiment of the present application.

[0028] Reference numerals

[0029] 100-battery;

[0030] 110-housing;

[0031] 111-cover plate;

[0032] 112-lower housing;

[0033] 113-accommodating chamber;

[0034] 120-battery cell;

[0035] 121-ear;

[0036] 130-connecting plate;

[0037] 140-Rivet parts;

[0038] 141-nail cap;

[0039] 142- nail post;

[0040] 1421-chamfer;

[0041] 150-rigid gasket;

[0042] 151-grid pattern;

[0043] 1511-grid;

[0044] 160-Pole Block. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] As described in the above background technology, a lithium-ion battery generally includes a shell and a battery cell in the shell. The battery cell has a tab, which is generally electrically connected to a pole block on the shell through a connecting plate to conduct electrical energy to a substrate outside the shell. At present, the connecting plate and the shell are generally electrically connected through rivets, which are connected by riveting and biting the rivets. However, the biting force between the rivet and the connecting plate and the shell is limited, which reduces the firmness and reliability of the connection between the connecting plate and the shell.

[0047] In order to solve the above problems, an embodiment of the present application provides a battery, by arranging a rigid gasket between the rivet part and the connecting plate, and making at least one side of the rigid gasket have a grid pattern, so that the friction between the rigid gasket and at least one of the rivet part or the connecting plate can be effectively increased, and the rigid gasket is tightly fitted with at least one of the rivet part or the connecting plate, which can effectively improve the firmness and reliability of the connection between the rivet part and the connecting plate, thereby effectively improving the reliability and stability of the connection between the connecting plate and the shell.

[0048] The battery provided in the embodiments of the present application is described in detail below in conjunction with the accompanying drawings.

[0049] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the present application, Figure 2 A schematic diagram of a structure of a connection between a connecting plate, a rivet member and a rigid gasket provided in an embodiment of the present application, Figure 3 A schematic structural diagram of the front side of a rigid gasket provided in an embodiment of the present application.

[0050] The present application embodiment provides a battery 100, see Figure 1 As shown, the battery 100 may include a shell 110 and a battery cell 120 located in the shell 110. For example, the shell 110 may include a lower shell 112 and a cover plate 111. The cover plate 111 may be covered on the lower shell 112. The cover plate 111 and the lower shell 112 may be jointly arranged to form a accommodating cavity 113. The battery cell 120 may be located in the accommodating cavity 113.

[0051] During the assembly of the battery 100 , the battery cell 120 may be first installed into the lower housing 112 , and then the cover plate 111 may be assembled onto the lower housing 112 to complete the assembly of the battery 100 , which may facilitate assembly and disassembly of the battery 100 .

[0052] Among them, see Figure 1 As shown, the battery cell 120 may be provided with a pole ear 121, and the battery 100 may further include a connecting plate 130 and a rivet 140, the connecting plate 130 may be located in the housing 110, and at least a portion of the rivet 140 may be located in the housing 110. One end of the connecting plate 130 may be connected to the pole ear 121, and the other end may be connected to the housing 110 through the rivet 140.

[0053] For example, the other end of the connecting plate 130 can be connected to the cover plate 111 in the shell 110. For example, the cover plate 111 and the connecting plate 130 can be stacked, and through holes (not shown in the figure) can be opened on the cover plate 111 and the connecting plate 130. The rivet member 140 can pass through the connecting plate 130 and the cover plate 111 in sequence, so that the connecting plate 130 and the cover plate 111 can be connected through the rivet member 140.

[0054] See also Figure 1 As shown, the battery 100 may further include a rigid gasket 150, combined with Figure 2 As shown, the rivet 140 may include a nut 141 and a nut column 142, and the nut column 142 may be inserted through the connecting plate 130 and the housing 110. For example, the nut column 142 may be inserted through the through holes on the connecting plate 130 and the cover plate 111. The rigid gasket 150 may be located between the nut 141 and the connecting plate 130, and, see Figure 3 As shown, at least one side of the rigid gasket 150 may have a grid pattern 151 .

[0055] For example, the rigid spacer 150 may be Figure 3 As shown, a grid pattern 151 is provided on the front side, or a grid pattern 151 can be provided on the back side of the rigid gasket 150. Alternatively, in some examples, a grid pattern 151 can be provided on both the front side and the back side of the rigid gasket 150.

[0056] During the assembly process, the rigid gasket 150 can be firstly sleeved on the nail column 142 of the rivet part 140, and then the nail column 142 can be passed through the connecting plate 130 and the cover plate 111, and finally the rivet part 140 can be pressed to make the rivet part 140 expand and deform to fill the through holes of the cover plate 111 and the connecting plate 130, so that the cover plate 111 and the connecting plate 130 can be connected through the rivet part 140.

[0057] In the process of pressing the rivet part 140, the two surfaces of the rigid gasket 150 can be pressed with the nail cap 141 of the rivet part 140 and the connecting plate 130 respectively. At least one side of the rigid gasket 150 has a grid pattern 151, which can effectively increase the friction between the rigid gasket 150 and at least one of the rivet part 140 or the connecting plate 130. The rigid gasket 150 is tightly fitted with at least one of the rivet part 140 or the connecting plate 130, which can effectively improve the firmness and reliability of the connection between the rivet part 140 and the connecting plate 130, thereby effectively improving the reliability and stability of the connection between the connecting plate 130 and the shell 110.

[0058] Moreover, the grid pattern 151 helps to increase the contact area between the rigid gasket 150 and the rivet part 140 or the connecting plate 130, which helps to improve the conductive effect between the rigid gasket 150 and the rivet part 140 or the connecting plate 130, thereby effectively improving the reliability and stability of the conductive effect between the rivet part 140 or the connecting plate 130.

[0059] Continue to see Figure 1 As shown, the battery 100 may further include a pole block 160 , which may be located outside the housing 110 , and the nail column 142 of the rivet 140 may also be inserted into the pole block 160 , and the connecting plate 130 and the pole block 160 may be electrically connected via the rivet 140 .

[0060] For example, a through hole (not shown in the figure) may also be provided on the pole block 160, and the nail column 142 of the rivet member 140 may be provided on the pole block 160 after passing through the through holes on the connecting plate 130 and the cover plate 111, so that the connecting plate 130 and the pole block 160 may be electrically connected through the rivet member 140. Thus, the current on the battery cell 120 may be transmitted to the pole block 160 through the pole ear 121, the connecting plate 130, and the rivet member 140 in sequence. During the use of the battery 100, the pole block 160 may contact the conductive connector on the electrical device so that the battery 100 may be electrically connected to the electrical device, so that the battery 100 may supply power to the electrical device.

[0061] Figure 4 A schematic structural diagram of the back side of a rigid gasket provided in an embodiment of the present application.

[0062] See also Figure 3 and Figure 4As shown, both surfaces of the rigid gasket 150 have a grid pattern 151, for example, both the front and back surfaces of the rigid gasket 150 have a grid pattern 151. That is, both the surface of the rigid gasket 150 facing the nail cap 141 of the rivet member 140 and the surface facing the connecting plate 130 have a grid pattern 151. This can effectively increase the friction and adhesion of the rigid gasket 150 with the rivet member 140 and the connecting plate 130, and can make the connection between the two surfaces of the rigid gasket 150 and the rivet member 140 and the connecting plate 130 firm and reliable, thereby effectively improving the reliability and stability of the connection between the connecting plate 130 and the housing 110.

[0063] Among them, continue to see Figure 4 As shown, the grid pattern 151 may include a plurality of evenly distributed grids 1511, and the shape of the grids 1511 may be rectangular, circular, elliptical or triangular, etc. For example, the rigid gasket 150 may be formed by stamping, and in the process of stamping the rigid gasket 150, an uneven grid pattern 151 may be formed on both surfaces of the rigid gasket 150, thereby increasing the adhesion of the surface of the rigid gasket 150.

[0064] Figure 5 for Figure 4 Magnified view of area A in the middle.

[0065] For example, see Figure 4 As shown, in the embodiment of the present application, the shape of the grid 1511 can be a rectangle, for example, a square. The side length of the rectangle can be 0.2 mm to 0.5 mm. For example, as shown in the figure, the side length of the rectangular grid 1511 can be a, and the value of a can be 0.2 mm to 0.5 mm. For example, the value of a can be 0.2 mm, 0.3 mm, 0.5 mm, etc.

[0066] The above-mentioned size of the grid 1511 can make the surface of the rigid gasket 150 have better adhesion, and can effectively improve the firmness and reliability of the connection between the rigid gasket 150 and the nail cap 141 and the connecting plate 130.

[0067] The tab 121 may include a positive tab and a negative tab, the connecting plate 130 may include a positive connecting plate and a negative connecting plate, and the rivet 140 may include a positive rivet and a negative rivet. The positive connecting plate and the positive rivet may be electrically connected to the positive tab, and the negative connecting plate and the negative rivet may be electrically connected to the negative tab.

[0068] For example, the positive electrode tab can be electrically connected to the positive electrode block through the positive electrode connecting plate and the positive electrode rivet in sequence. Correspondingly, the negative electrode tab can be electrically connected to the negative electrode block through the negative electrode connecting plate and the negative electrode rivet in sequence.

[0069] The positive electrode connecting plate may be an aluminum plate, the positive electrode rivet may be an aluminum rivet, and the material of the positive electrode tab may also be aluminum. For example, the molding materials of the positive electrode connecting plate, the positive electrode rivet and the positive electrode tab may all be aluminum.

[0070] The negative electrode connecting plate may be a copper plate, the negative electrode rivet may be a copper rivet, and the negative electrode tab may be a copper material. For example, the molding materials of the negative electrode connecting plate, the negative electrode rivet and the negative electrode tab may all be copper.

[0071] The hardness of the rigid gasket 150 may be greater than the hardness of the rivet 140 and the connecting plate 130 . For example, the material hardness of the positive rigid gasket may be greater than 100 HV, and the material hardness of the negative rigid gasket may be greater than 150 HV.

[0072] In this way, during the pressing process, the rigid gasket 150 has a higher hardness and is not easy to deform. The connecting plate 130 and the rivet part 140 can be deformed before the rigid gasket 150 and fill the grid pattern 151 on the rigid gasket 150, so that the connecting plate 130 and the rivet part 140 can be tightly connected to the rigid gasket 150, which can effectively improve the firmness and reliability of the connection between the rigid gasket 150 and the connecting plate 130 and the rivet part 140.

[0073] Figure 6 A front view of a rivet provided in an embodiment of the present application, Figure 7 A top view of a rivet provided in an embodiment of the present application.

[0074] See also Figure 6 and Figure 7 As shown, the end of the nail column 142 in the rivet 140 facing away from the nail cap 141 may also have a chamfer 1421. The chamfer 1421 can reduce the diameter of the end of the nail column 142, which can facilitate the insertion of the nail column 142 into the through holes on the connecting plate 130, the back plate and the pole block 160, which can facilitate the assembly of the battery 100 and help improve the assembly efficiency of the battery 100.

[0075] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "horizontal", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0076] In the description of the present invention, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0077] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium, and it can make the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery, characterized in that: It comprises a shell and a battery cell located in the shell, wherein the battery cell is provided with a tab; It also includes a connecting plate and a rivet member, wherein the connecting plate is located in the shell, at least a portion of the rivet member is located in the shell, one end of the connecting plate is connected to the pole ear, and the other end is connected to the shell through the rivet member; It also includes a rigid gasket, the rivet part includes a nail cap and a nail column, the nail column is penetrated on the connecting plate and the shell, the rigid gasket is located between the nail cap and the connecting plate, and at least one side of the rigid gasket has a grid pattern.

2. The battery according to claim 1, characterized in that The rigid gasket has grid patterns on both sides.

3. The battery according to claim 1 or 2, characterized in that: The grid pattern includes a plurality of evenly distributed grids, and the shape of the grids is rectangular, circular, elliptical or triangular.

4. The battery according to claim 3, characterized in that The grid is in a rectangular shape, and the side length of the grid is 0.2 mm to 0.5 mm.

5. The battery according to claim 1 or 2, characterized in that: It also includes a pole block, which is located outside the shell, and the nail column of the rivet member is also penetrated on the pole block, and the connecting plate is electrically connected to the pole block through the rivet member.

6. The battery according to claim 1 or 2, characterized in that: The housing comprises a lower housing and a cover plate, wherein the cover plate is disposed on the lower housing, and the cover plate and the lower housing are jointly arranged to form a receiving cavity, wherein the battery cell and the connecting plate are both located in the receiving cavity; The connecting plate is connected to the cover plate.

7. The battery according to claim 1 or 2, characterized in that: The pole lugs include a positive pole lug and a negative pole lug, the connecting plates include a positive connecting plate and a negative connecting plate, and the rivet members include a positive rivet member and a negative rivet member; The positive electrode connecting plate and the positive electrode rivet are electrically connected to the positive electrode tab, and the negative electrode connecting plate and the negative electrode rivet are electrically connected to the negative electrode tab.

8. The battery according to claim 7, characterized in that The positive electrode connecting plate is an aluminum plate, and the positive electrode rivet piece is an aluminum rivet.

9. The battery according to claim 7, characterized in that The negative electrode connecting plate is a copper plate, and the negative electrode rivet piece is a copper rivet.

10. The battery according to claim 1 or 2, characterized in that: One end of the nail column in the rivet component facing away from the nail cap also has a chamfer.

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