Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment. The battery comprises a shell, a connecting piece and a mounting bracket, the connecting piece is used for connecting the shell and the tab, the mounting bracket is fixed in the shell, and the connecting piece is mounted on the mounting bracket. According to the battery disclosed by the invention, the connecting piece is fixed by utilizing the mounting bracket, so that the stability of the connecting piece is improved, the stability of the connecting piece for connecting the shell and the tab is improved, and the stability of the battery is further ensured.

Description

[0001] Cross Reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No.

[0003] 202423033318.8, filed on December 09, 2024, with the Chinese Patent Office, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0004] The present application relates to the technical field of batteries, in particular to a battery and an electric device. BACKGROUND

[0005] Batteries are widely used in energy storage systems, vehicles, consumer electronics and other fields. The shell and the tab of the battery need to be connected together through a connecting structure.

[0006] In related technologies, the installation stability of the connecting structure of the battery needs to be improved. UTILITY MODEL CONTENT

[0007] Embodiments of the present application provide a battery and an electric device, which can improve the technical problem of insufficient installation stability of the connecting structure of the battery.

[0008] In a first aspect, embodiments of the present application provide a battery, comprising:

[0009] a shell;

[0010] a connecting piece, configured to connect the shell and the tab;

[0011] a mounting bracket, fixed in the shell, and the connecting piece is mounted on the mounting bracket.

[0012] In an embodiment, at least part of the connecting piece protrudes from the mounting bracket.

[0013] In an embodiment, along the axial direction of the shell, the height of the connecting piece protruding from the mounting bracket is H2, and H2≥0.2mm.

[0014] In an embodiment, the connecting piece comprises an electrode connecting piece connected with the shell and a tab connecting piece connected with the tab, the tab connecting piece is mounted on the mounting bracket, and the electrode connecting piece at least partially protrudes from the mounting bracket.

[0015] In an embodiment, the mounting bracket is formed with a connecting gap, a first end of the electrode connecting piece is connected with the tab connecting piece, a second end of the electrode connecting piece penetrates through the connecting gap and is connected with the shell, and the second end of the electrode connecting piece and the tab connecting piece are respectively located on two sides of the mounting bracket.

[0016] In an embodiment, the lug connector, the wall of the connecting gap and the electrode connector enclose an encapsulation cavity for accommodating an encapsulation part.

[0017] In an embodiment, the battery further comprises an electrode assembly, the housing is formed with a mounting cavity, and the electrode assembly is mounted in the mounting cavity.

[0018] The housing is formed with a retracted part protruding into the mounting cavity, the mounting support is located between the retracted part and the electrode assembly, and the connector connects the positive lug of the retracted part and the electrode assembly.

[0019] In an embodiment, the lug connector is connected to a side of the mounting support away from the retracted part.

[0020] In an embodiment, the battery further comprises an electrode assembly, the housing is formed with a mounting cavity, and the electrode assembly is mounted in the mounting cavity.

[0021] The mounting support is located between the electrode assembly and the inner bottom wall of the housing, and the connector connects the negative lug of the electrode assembly and the inner bottom wall of the housing.

[0022] In an embodiment, the lug connector is connected to a side of the mounting support away from the inner bottom wall of the housing.

[0023] In an embodiment, the mounting support is fixedly connected to the housing.

[0024] In an embodiment, the connector comprises an electrode connector connected to the housing and a lug connector connected to the lug, the part of the mounting support connected to the housing is made of metal, and the part of the mounting support in contact with the lug connector is made of insulating material.

[0025] In an embodiment, the mounting support is made of metal, and the battery further comprises an insulating part arranged between the lug connector and the mounting support.

[0026] In an embodiment, the connection between the mounting support and the housing is provided with an encapsulation part.

[0027] In an embodiment, a plurality of electrode connectors are uniformly distributed along the axial direction of the mounting support; and / or, the central angle of the electrode connector is greater than or equal to 30°.

[0028] In an embodiment, along the radial direction of the shell, the length of the tab connecting piece is L1, the connecting length of the electrode connecting piece and the tab connecting piece is H3, and the ratio of H3 to L1 is between 0.1 and 0.9.

[0029] In an embodiment, the battery further comprises a packaging portion, and at least part of the packaging portion is arranged at the connection between the electrode connecting piece and the tab connecting piece.

[0030] In an embodiment, along the radial direction of the shell, the first end of the packaging portion extends to the connection with the tab connecting piece, and the second end of the packaging portion extends to the connection with the electrode connecting piece.

[0031] In an embodiment, along the radial direction of the shell, the connecting length of the packaging portion and the tab connecting piece is H4, and H4 is greater than or equal to 0.2 mm.

[0032] In an embodiment, the electrode connecting piece comprises a first connecting segment and a third connecting segment connected in sequence, the first connecting segment is connected with the tab connecting piece, and the third connecting segment protrudes or bends away from the tab connecting piece.

[0033] In an embodiment, the side of the third connecting segment close to the side wall surface of the shell is provided with the packaging portion and the tab connecting piece.

[0034] In an embodiment, along the radial direction of the shell, the packaging portion protrudes from the tab connecting piece.

[0035] In a second aspect, an embodiment of the present application provides a power utilization device comprising the battery described above.

[0036] The beneficial effects of the embodiments of the present application are as follows:

[0037] In the embodiments of the present application, the shell and the tab are connected by the connecting piece, so that the battery can work normally. The connecting piece is installed on the mounting bracket, and the mounting bracket is used to fix the connecting piece, thereby improving the stability of the connecting piece, improving the stability of the connecting piece connecting the shell and the tab, and further ensuring the stability of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 FIG. 1 is a partial structure schematic diagram of a battery provided by an embodiment of the present application.

[0040] Figure 2 Figure 2 is a partial structural schematic diagram of a battery according to an embodiment of the present application;

[0041] Figure 3 Figure 3 is a cross-sectional view of a partial structure of a battery according to an embodiment of the present application;

[0042] Figure 4 Figure 4 is a partial structural schematic diagram of a battery according to an embodiment of the present application; Figure 3 Figure 5 is an enlarged schematic diagram of a structure at A in Figure 4;

[0043] Figure 5 Figure 6 is a partial structural schematic diagram of a battery according to an embodiment of the present application;

[0044] Figure 6 Figure 7 is a partial structural schematic diagram of a housing according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, any other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the outline of the device.

[0046] The battery and the electric device according to the present application will be described below with reference to the drawings. Figures 1 to 6 The battery and the electric device according to the present application will be described below with reference to the drawings.

[0047] According to the embodiments of the first aspect of the present application, with reference to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , the battery comprises a housing 1, a connecting piece 2 and a mounting bracket 4, the connecting piece 2 is used to connect the housing 1 and the tab, the mounting bracket 4 is fixed in the housing 1, and the connecting piece 2 is mounted on the mounting bracket 4.

[0048] According to the battery of the embodiments of the present application, the connecting piece 2 is used to connect the housing 1 and the tab, so that the battery can work normally. The connecting piece 2 is mounted on the mounting bracket 4, and the mounting bracket 4 is used to fix the connecting piece 2, thereby improving the stability of the connecting piece 2, improving the stability of the connecting piece 2 in connecting the housing 1 and the tab, and further ensuring the stability of the battery.

[0049] In some examples, the mounting bracket 4 is fixedly connected to the shell 1, or fixedly connected to the electrode assembly mounted in the shell 1.

[0050] In some embodiments, the connecting member 2 protrudes from the mounting bracket 4 at least partially.

[0051] It can be understood that the connecting member 2 protruding from the mounting bracket 4 is not shielded by the mounting bracket 4, so that the mounting bracket 4 does not shield the connection between the connecting member 2 and the shell 1, or does not shield the connection between the connecting member 2 and the tab, so that the connecting member 2 can be connected to the shell 1 and the tab, and the influence of the mounting bracket 4 on the connection between the shell 1 and the tab can be reduced, and it is ensured that the connecting member 2 can be connected to the shell 1 and the tab.

[0052] In some embodiments, referring to Figure 1 and Figure 2 , the connecting member 2 includes an electrode connecting member 22 connected to the shell 1 and a tab connecting member 23 connected to the tab, the tab connecting member 23 is mounted on the mounting bracket 4, and the electrode connecting member 22 protrudes from the mounting bracket 4 at least partially.

[0053] It can be understood that the electrode connecting member 22 can be connected to the tab connecting member 23 at the mounting bracket 4, and the electrode connecting member 22 protruding from the mounting bracket 4 can be connected to the shell 1, so that the connecting member 2 can be connected to the shell 1 and the tab, and the influence of the mounting bracket 4 on the connection between the shell 1 and the tab can be avoided.

[0054] In some embodiments, referring to Figure 4 , along the axial direction of the shell 1, the height of the connecting member 2 protruding from the mounting bracket 4 is H2, and H2≥0.2mm, so as to facilitate the connection between the connecting member 2 and the shell 1.

[0055] In some embodiments, referring to Figure 1 and Figure 2 , the mounting bracket 4 is formed with a connecting gap 42, a first end of the electrode connecting member 22 is connected to the tab connecting member 23, a second end of the electrode connecting member 22 penetrates through the connecting gap 42 and is connected to the shell 1, and the second end of the electrode connecting member 22 and the tab connecting member 23 are located on two sides of the mounting bracket 4 respectively.

[0056] It can be understood that the tab connecting piece 23 is arranged at one side of the mounting bracket 4, and the first end of the electrode connecting piece 22 is connected with the tab connecting piece 23. The second end of the electrode connecting piece 22 can extend away from the tab connecting piece 23 through the connecting gap 42, that is, the second end of the electrode connecting piece 22 can be arranged through the connecting gap 42, so that the second end of the shell 1 is located at the other side of the mounting bracket 4, the tab connecting piece 23 can be connected with the tab at one side of the mounting bracket 4, and the second end of the electrode connecting piece 22 can be connected with the shell 1 at the other side of the mounting bracket 4, thereby facilitating the connection of the connecting piece 2 with the shell 1 and the tab.

[0057] In some embodiments, referring to Figure 1 and Figure 4 , the tab connecting piece 23, the wall surface of the connecting gap 42 and the electrode connecting piece 22 form an encapsulation cavity 421, and the encapsulation cavity 421 is used for accommodating the encapsulation part 3.

[0058] It can be understood that the second end of the electrode connecting piece 22 is arranged to pass through the connecting gap 42, and the tab connecting piece 23 is arranged on the mounting bracket 4. The tab connecting piece 23, the wall surface of the connecting gap 42 and the electrode connecting piece 22 form the encapsulation cavity 421, the tab connecting piece 23 can be used as the bottom wall of the encapsulation cavity 421, and the electrode connecting piece 22 and the wall surface of the connecting gap 42 can be used as the side wall of the encapsulation cavity 421, so that the encapsulation cavity 421 can be used for accommodating the encapsulation part 3, thereby facilitating the arrangement of the encapsulation part 3.

[0059] It can be understood that the encapsulation part 3 is arranged in the encapsulation cavity 421, so that the encapsulation part 3 can cover the connection between the electrode connecting piece 22 and the tab connecting piece 23, thereby effectively improving the corrosion resistance of the connection between the electrode connecting piece 22 and the tab connecting piece 23.

[0060] In some embodiments, referring to Figure 1 , Figure 5 and Figure 6 , the battery further comprises an electrode assembly, the shell 1 is formed with a mounting cavity 11, and the electrode assembly is arranged in the mounting cavity 11.

[0061] The shell 1 is formed with a retracted part 12, the retracted part 12 protrudes into the mounting cavity 11, the mounting bracket 4 is located between the retracted part 12 and the electrode assembly, and the connecting piece 2 connects the retracted part 12 and the positive tab of the electrode assembly.

[0062] It can be understood that the mounting bracket 4 is arranged between the retracted part 12 and the electrode assembly, thereby facilitating the connection of the connecting piece 2 with the positive tab of the electrode assembly, and achieving the connection of the shell 1 and the tab by the connecting piece 2.

[0063] Specifically, the tab connecting piece 23 is connected to the side of the mounting bracket 4 away from the retracted part 12.

[0064] It can be understood that the mounting bracket 4 is located between the inner recess 12 and the electrode assembly, i.e. the mounting bracket 4 is located between the inner recess 12 and the positive tab of the electrode assembly. Therefore, the tab connecting piece 23 is connected to the side of the mounting bracket 4 away from the inner recess 12, so that the tab connecting piece 23 is arranged opposite to the positive tab of the electrode assembly, facilitating the connection of the tab connecting piece 23 and the positive tab.

[0065] In some embodiments, the battery further comprises an electrode assembly, and the shell 1 is formed with a mounting cavity 11, and the electrode assembly is mounted in the mounting cavity 11.

[0066] The mounting bracket 4 is located between the electrode assembly and the inner bottom wall of the shell 1, and the connecting piece 2 connects the negative tab of the electrode assembly and the inner bottom wall of the shell 1.

[0067] It can be understood that the mounting bracket 4 is arranged between the electrode assembly and the inner bottom wall of the shell 1, facilitating the connection of the connecting piece 2 and the negative tab and the inner bottom wall of the shell 1, and achieving the connection of the shell 1 and the negative tab by the connecting piece 2.

[0068] Specifically, the tab connecting piece 23 is connected to the side of the mounting bracket 4 away from the inner bottom wall of the shell 1.

[0069] It can be understood that the mounting bracket 4 is located between the electrode assembly and the inner bottom wall of the shell 1, i.e. the mounting bracket 4 is located between the negative tab and the inner bottom wall of the shell 1. Therefore, the tab connecting piece 23 is connected to the side of the mounting bracket 4 away from the inner bottom wall of the shell 1, so that the tab connecting piece 23 is arranged opposite to the negative tab of the electrode assembly, facilitating the connection of the tab connecting piece 23 and the negative tab.

[0070] In some embodiments, the mounting bracket 4 is fixedly connected with the shell 1.

[0071] It can be understood that the mounting bracket 4 and the shell 1 are fixedly connected, so that the mounting bracket 4 remains fixed, and the connecting piece 2 connected to the mounting bracket 4 also remains stable.

[0072] In some examples, the mounting bracket 4 can be fixedly connected with the shell 1, and can also be fixedly mounted on the electrode assembly or any other suitable position.

[0073] Specifically, the connecting piece 2 comprises an electrode connecting piece 22 connected with the shell 1 and a tab connecting piece 23 connected with the tab, the part of the mounting bracket 4 connected with the shell 1 is made of metal material, and the part of the mounting bracket 4 in contact with the tab connecting piece 23 is made of insulating material.

[0074] It can be understood that the part connecting the mounting bracket 4 and the shell 1 is made of metal material, which facilitates the connection of the mounting bracket 4 and the shell 1. The part contacting the tab connecting piece 23 is made of insulating material, which can avoid the tab connecting piece 23 from being electrically connected to the shell 1 through the mounting bracket 4.

[0075] Specifically, the mounting bracket 4 is made of metal material, and the battery further comprises an insulating part arranged between the tab connecting piece 23 and the mounting bracket 4.

[0076] It can be understood that the mounting bracket 4 can be made of metal material, which facilitates the connection of the mounting bracket 4 and the shell 1. Meanwhile, the insulating part is arranged between the tab connecting piece 23 and the mounting bracket 4, which insulates and separates the tab connecting piece 23 and the mounting bracket 4, thereby avoiding the tab connecting piece 23 from being electrically connected to the shell 1 through the mounting bracket 4.

[0077] In some embodiments, the mounting bracket 4 is provided with an encapsulating part 3 at the connection with the shell 1.

[0078] It can be understood that the encapsulating part 3 can prevent the connection between the mounting bracket 4 and the shell 1 from contacting other substances (such as electrolyte), which can effectively avoid corrosion of the connection between the mounting bracket 4 and the shell 1, thereby improving the connection stability of the mounting bracket 4 and the shell 1.

[0079] In some embodiments, the plurality of electrode connecting pieces 22 are uniformly distributed along the axial direction of the mounting bracket 4, which improves the structural uniformity of the connecting piece 2.

[0080] In some embodiments, the central angle of the electrode connecting piece 22 is greater than or equal to 30°, which ensures that the central angle of the connection position of the electrode connecting piece 22 and the shell 1 can be greater than or equal to 30°, thereby improving the connection stability of the electrode connecting piece 22 and the shell 1.

[0081] In some embodiments, along the radial direction of the shell 1, the length of the tab connecting piece 23 is L1, the connection length of the electrode connecting piece 22 and the tab connecting piece 23 is H3, and the ratio of H3 to L1 is between 0.1 and 0.9, which ensures the connection length of the electrode connecting piece 22 and the tab connecting piece 23, thereby ensuring the connection stability of the electrode connecting piece 22 and the tab connecting piece 23.

[0082] In some embodiments, the battery further comprises an encapsulating part 3, and at least part of the encapsulating part 3 is arranged at the connection between the electrode connecting piece 22 and the tab connecting piece 23.

[0083] It can be understood that the encapsulating part 3 can prevent impurities (such as electrolyte) from entering the connection between the electrode connecting piece 22 and the tab connecting piece 23, thereby avoiding the impurities from affecting the connection strength of the electrode connecting piece 22 and the tab connecting piece 23.

[0084] In some embodiments, along the radial direction of the shell 1, the first end of the packaging portion 3 extends to be connected with the tab connecting piece 23, and the second end of the packaging portion 3 extends to be connected with the electrode connecting piece 22, so that the electrode connecting piece 22 and the tab connecting piece 23 are simultaneously connected with the packaging portion 3, which ensures that the packaging portion 3 can effectively protect the connection between the electrode connecting piece 22 and the tab connecting piece 23.

[0085] Specifically, along the radial direction of the shell 1, the connection length of the packaging portion 3 and the tab connecting piece 23 is H4, and H4≥0.2mm.

[0086] It can be understood that the connection length of the packaging portion 3 and the tab connecting piece 23 is greater than or equal to 0.2mm, which ensures the packaging protection effect of the packaging portion 3.

[0087] In some embodiments, referring to Figure 3 and Figure 4 The electrode connecting piece 22 comprises a first connecting segment 223 and a third connecting segment 225 connected in sequence, the first connecting segment 223 is connected with the tab connecting piece 23, and the third connecting segment 225 protrudes or bends away from the tab connecting piece 23, thereby facilitating the connection of the third connecting segment 225 and the shell 1.

[0088] In some embodiments, the side of the third connecting segment 225 close to the side wall surface of the shell 1 is provided with the packaging portion 3 between the tab connecting piece 23.

[0089] It can be understood that the packaging portion 3 can prevent impurities from entering the connection between the third connecting segment 225 and the tab connecting piece 23, and avoid the impurities affecting the connection strength of the third connecting segment 225 and the tab connecting piece 23.

[0090] In some embodiments, along the radial direction of the shell 1, the packaging portion 3 protrudes from the tab connecting piece 23, so that the packaging portion 3 can separate the side wall of the shell 1 and the tab connecting piece 23, avoiding the direct connection between the tab connecting piece 23 and the side wall of the shell 1.

[0091] In some embodiments, the battery comprises the connecting piece 2 and the packaging portion 3, the connecting piece 2 has the electrode connecting piece 22 and the tab connecting piece 23, the electrode connecting piece 22 is used to connect the electrode of the battery, and the tab connecting piece 23 is used to connect the tab of the battery.

[0092] At least part of the structure of the packaging portion 3 is arranged at the connection between the electrode connecting piece 22 and the tab connecting piece 23, and / or at least part of the structure of the packaging portion 3 is arranged at the connection between the electrode connecting piece 22 and the electrode of the battery.

[0093] According to the battery of the embodiment of the present application, by arranging the encapsulation part 3 at the connection between the electrode connecting part 22 and the tab connecting part 23, the encapsulation part 3 can prevent impurities from entering the connection between the electrode connecting part 22 and the tab connecting part 23, avoid the impurities affecting the connection strength of the electrode connecting part 22 and the tab connecting part 23, improve the connection stability of the electrode connecting part 22 and the tab connecting part 23, improve the structural stability of the connecting part 2, and further improve the connection stability between the tab of the battery and the electrode of the battery. By arranging the encapsulation part 3 at the connection between the electrode connecting part 22 and the electrode, the encapsulation part 3 can prevent impurities from entering the connection between the electrode connecting part 22 and the electrode, avoid the impurities affecting the connection strength of the electrode connecting part 22 and the electrode, improve the connection stability of the electrode connecting part 22 and the electrode, and further improve the connection stability between the tab of the battery and the electrode of the battery.

[0094] In some embodiments, the electrode of the battery comprises a battery housing or a battery pole.

[0095] It can be understood that when the electrode of the battery is the battery housing, the electrode connecting part 22 is connected with the battery housing, that is, the connecting part 2 connects the battery housing and the tab of the battery. When the electrode of the battery is the battery pole, the electrode connecting part 22 is connected with the battery pole, that is, the connecting part 2 connects the battery pole and the tab of the battery.

[0096] In some examples, the impurities are, for example, electrolyte.

[0097] In some examples, the encapsulation part 3 is arranged at least partially on the connecting part 2, which can be arranged at the bending part of the connecting part 2, or arranged on the entire connecting part 2, or arranged at the end of the connecting part 2 connected with the housing 1.

[0098] In some examples, at least part of the structure of the encapsulation part 3 is arranged at the connection between the connecting part 2 and the housing 1, which means that part of the encapsulation part 3 is arranged at the connection between the connecting part 2 and the housing 1, and another part of the encapsulation part 3 is arranged at other positions of the connecting part 2.

[0099] In some examples, at least part of the structure of the encapsulation part 3 is arranged at the connection between the connecting part 2 and the housing 1, which means that the encapsulation part 3 is arranged on the circumferential side of the connection between the connecting part 2 and the housing 1, or arranged on the connection between the connecting part 2 and the housing 1.

[0100] In some examples, the encapsulation part 3 is, for example, encapsulation glue, and the material of the encapsulation glue is polyurethane type, epoxy resin type, anaerobic glue, UV glue, acrylic type, hot melt glue, etc., and the elastic modulus of the encapsulation glue is between 0.1 Gpa and 6 Gpa.

[0101] Specifically, the encapsulation part 3 is arranged at the connection between the electrode connecting part 22 and the electrode of the battery.

[0102] It can be understood that, by arranging the encapsulation part 3 at the connection between the electrode connecting piece 22 and the electrode of the battery, the encapsulation part 3 can prevent the connection between the electrode connecting piece 22 and the electrode of the battery from contacting other substances, avoid the connection strength between the electrode connecting piece 22 and the electrode of the battery from being affected by other substances, ensure the connection strength between the electrode connecting piece 22 and the electrode, improve the stability of the connection between the electrode connecting piece 22 and the electrode, and thus make the connecting piece 2 be able to stably connect the electrode and the tab, and improve the stability of the connection between the electrode and the tab.

[0103] Specifically, the connection between the electrode connecting piece 22 and the tab connecting piece 23 is provided with the encapsulation part 3.

[0104] It can be understood that, by arranging the encapsulation part 3 at the connection between the electrode connecting piece 22 and the tab connecting piece 23, the encapsulation part 3 can prevent the connection between the electrode connecting piece 22 and the tab connecting piece 23 from contacting other substances, avoid the connection strength between the electrode connecting piece 22 and the tab connecting piece 23 from being affected by other substances, ensure the connection strength between the electrode connecting piece 22 and the tab connecting piece 23, improve the structural stability of the connecting piece 2, and thus make the connecting piece 2 be able to stably connect the electrode and the tab of the battery, and improve the stability of the connection between the electrode and the tab of the battery.

[0105] Specifically, the electrode connecting piece 22 and the tab connecting piece 23 are both in contact with the encapsulation part 3.

[0106] It can be understood that, at the connection between the electrode connecting piece 22 and the tab connecting piece 23, a part of the encapsulation part 3 is in contact with the electrode connecting piece 22, and another part of the encapsulation part 3 is in contact with the tab connecting piece 23, which ensures that the encapsulation part 3 can effectively encapsulate the connection between the electrode connecting piece 22 and the tab connecting piece 23, effectively prevent impurities from entering the connection between the electrode connecting piece 22 and the tab connecting piece 23, and improve the connection stability of the electrode connecting piece 22 and the tab connecting piece 23.

[0107] For example, the encapsulation part 3 has at least two connecting surfaces, one of the connecting surfaces of the encapsulation part 3 is in contact with the electrode connecting piece 22, and the other connecting surface of the encapsulation part 3 is in contact with the tab connecting piece 23 at the connection between the electrode connecting piece 22 and the tab connecting piece 23.

[0108] Specifically, the electrode connecting piece 22 and the electrode of the battery are both in contact with the encapsulation part 3.

[0109] It can be understood that at the connection between the electrode connecting piece 22 and the electrode of the battery, one part of the packaging portion 3 is in contact with the electrode connecting piece 22, and another part of the packaging portion 3 is in contact with the electrode, so that the packaging portion 3 can effectively package the connection between the electrode connecting piece 22 and the electrode, effectively prevent impurities from entering the connection between the electrode connecting piece 22 and the electrode, and improve the connection stability of the electrode connecting piece 22 and the electrode.

[0110] For example, the packaging portion 3 has at least two connecting surfaces, one of which is in contact with the electrode connecting piece 22 at the connection between the electrode connecting piece 22 and the electrode, and the other is in contact with the electrode.

[0111] In some embodiments, the battery includes a shell 1, and the connection between the electrode connecting piece 22 and the shell 1 is provided with a packaging portion 3.

[0112] It can be understood that the packaging portion 3 can prevent impurities from entering the connection between the electrode connecting piece 22 and the shell 1, and avoid affecting the connection strength of the electrode connecting piece 22 and the shell 1.

[0113] Specifically, the packaging portion extends to the side wall surface of the shell and abuts against the side wall surface of the shell, so that the packaging portion can effectively package the connection between the electrode connecting piece 22 and the shell 1, and prevent impurities from entering the connection between the electrode connecting piece 22 and the shell 1.

[0114] In some embodiments, the tab connecting piece 23 is arranged apart from the shell 1.

[0115] It can be understood that the tab connecting piece 23 is arranged apart from the shell 1, so that the tab connecting piece 23 will not be in direct contact with the shell 1, reducing the connection points of the connecting piece 2 and the shell 1, and avoiding corrosion and other problems caused by the contact between the tab connecting piece 23 and the shell 1.

[0116] In some examples, the electrode connecting piece 22 is connected to the tab connecting piece 23 by surface chemical treatment, such as electroplating, chemical plating, and spraying. It can also be connected to the tab connecting piece 23 by surface physical treatment, such as composite metal stamping.

[0117] In some examples, the tab connecting piece 23 and the electrode connecting piece 22 can be connected together by welding, cold upsetting, thermal compounding, jointing, riveting, heat shrink tube, etc. The electrode connecting piece 22 and the shell 1 can be connected by laser welding, spot welding, resistance welding, etc.

[0118] In some examples, the tab connector 23 comprises a first contact surface in contact with the electrode connector 22, the electrode connector 22 comprises a second contact surface in contact with the tab connector 23, and the first contact surface and / or the second contact surface is provided with a protrusion / groove / rough surface / embossed structure to increase the contact area of the tab connector 23 and the electrode connector 22.

[0119] In some examples, the tab connector 23 is made of copper, and the electrode connector 22 is made of nickel-plated steel strip, nickel strip, or stainless steel.

[0120] In some embodiments, one of the shell 1, the electrode connector 22 and the tab connector 23 is a first metal piece, and the other two are second metal pieces, the first metal piece and the second metal pieces are made of different metal materials, and the connection between the first metal piece and the second metal piece is provided with the encapsulation part 3. The first metal material and the second metal material are different.

[0121] It can be understood that, by providing the encapsulation part 3 at the connection between the first metal piece and the second metal piece, i.e. at the contact position of the different metal materials, the encapsulation part 3 can prevent the connection between the first metal piece and the second metal piece from contacting other substances (such as electrolyte), so that the connection between the first metal piece and the second metal piece is not prone to corrosion, thereby improving the structural stability of the connector 2 or the connection between the connector 2 and the shell 1, so that the connector 2 can stably connect the shell 1 and the tab.

[0122] It can be understood that, by including two different metal materials in the shell 1, the electrode connector 22 and the tab connector 23, the stability of the connection between the connection part 21 and the shell 1 can be effectively ensured.

[0123] For example, the first metal piece is made of a first metal material, the second metal piece is made of a second metal material, and the first metal material and the second metal material are different.

[0124] It should be noted that the metal material includes a plurality of metal atoms, and the two metal materials respectively include two groups of metal atoms. As long as one metal atom in one group is different from the metal atoms in the other group, the two metal materials can be considered as different metal materials. That is, as long as there is one different metal atom between the first metal material and the second metal material, the first metal material and the second metal material can be considered as different.

[0125] The metal material can be pure metal, alloy, or metal matrix composite material with one or more insoluble solid particles.

[0126] The metal material can be a multi-layer structure, for example, the metal material can include a base material and a metal layer arranged on the base material, and the metal layer can be formed on the base material by electroplating, CVD or the like. The metal layer can be pure metal or alloy, and can also be a metal matrix composite material with one or more insoluble solid particles.

[0127] Specifically, the electrode connecting piece 22 and the tab connecting piece 23 are both second metal pieces, the shell 1 is a first metal piece, and the connection between the electrode connecting piece 22 and the shell 1 is provided with the encapsulation part 3.

[0128] It can be understood that the metal materials of the electrode connecting piece 22 and the shell 1 are different, and by arranging the encapsulation part 3 at the connection between the electrode connecting piece 22 and the shell 1, the encapsulation part 3 can prevent the connection between the electrode connecting piece 22 and the shell 1 from contacting other substances, so that the connection between the electrode connecting piece 22 and the shell 1, i.e., the connection between different metal materials, is not prone to corrosion, improving the connection stability of the electrode connecting piece 22 and the shell 1, so that the connecting piece 2 can stably connect the shell 1 and the tab.

[0129] Specifically, the electrode connecting piece 22 and the shell 1 are both second metal pieces, the tab connecting piece 23 is a first metal piece, and the connection between the electrode connecting piece 22 and the tab connecting piece 23 is provided with the encapsulation part 3.

[0130] It can be understood that the metal materials of the electrode connecting piece 22 and the tab connecting piece 23 are different, and by arranging the encapsulation part 3 at the connection between the electrode connecting piece 22 and the tab connecting piece 23, the encapsulation part 3 can prevent the connection between the electrode connecting piece 22 and the tab connecting piece 23 from contacting other substances, so that the connection between the electrode connecting piece 22 and the tab connecting piece 23, i.e., the connection between different metal materials, is not prone to corrosion, improving the connection stability of the electrode connecting piece 22 and the tab connecting piece 23, improving the structural stability of the connecting piece 2, so that the connecting piece 2 can stably connect the shell 1 and the tab.

[0131] Exemplarily, the electrode assembly at least includes a winding core.

[0132] According to the embodiment of the second aspect of the present application, the electric device includes the above-mentioned battery.

[0133] According to the electric device of the embodiment of the present application, the shell 1 and the tab are connected by the connecting piece 2, so that the battery can work normally. The connecting piece 2 is installed on the mounting bracket 4, and the mounting bracket 4 is used to fix the connecting piece 2, improving the stability of the connecting piece 2 and the stability of the connecting piece 2 connecting the shell 1 and the tab, thereby ensuring the stability of the battery.

[0134] It should be noted that the electric device can be a vehicle, an aircraft, or a household appliance. It should be noted that the foregoing is only an example of the electric device and does not specially limit the electric device.

[0135] The above describes the embodiments of the present application in detail, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manner and application range can be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A battery, characterized by, The battery comprises: a shell; a connecting piece for connecting the shell and a tab; a mounting bracket fixed in the shell, the connecting piece being mounted on the mounting bracket.

2. The battery of claim 1, wherein, At least part of the connecting piece protrudes from the mounting bracket.

3. The battery of claim 2, wherein, The height of the connecting piece protruding from the mounting bracket along the axial direction of the shell is H2, and H2≥0.2 mm.

4. The battery of claim 1, wherein, The connecting piece comprises an electrode connecting piece connected with the shell and a tab connecting piece connected with the tab, the tab connecting piece being mounted on the mounting bracket, and the electrode connecting piece at least partially protruding from the mounting bracket.

5. The battery of claim 4, wherein, The mounting bracket is formed with a connecting gap, a first end of the electrode connecting piece being connected with the tab connecting piece, a second end of the electrode connecting piece penetrating through the connecting gap and being connected with the shell, and the second end of the electrode connecting piece and the tab connecting piece being located on two sides of the mounting bracket respectively.

6. The battery of claim 5, wherein, The tab connecting piece, the wall surface of the connecting gap and the electrode connecting piece form an encapsulation cavity for accommodating an encapsulation part.

7. The battery of claim 4, wherein, The battery further comprises an electrode assembly, the shell being formed with a mounting cavity, and the electrode assembly being mounted in the mounting cavity. The shell is formed with a retracted part protruding into the mounting cavity, the mounting bracket being located between the retracted part and the electrode assembly, and the connecting piece connecting the positive tab of the electrode assembly and the retracted part.

8. The battery of claim 7, wherein, The tab connecting piece is connected to the side of the mounting bracket away from the retracted part.

9. The battery of claim 4, wherein, The battery further comprises an electrode assembly, the shell being formed with a mounting cavity, and the electrode assembly being mounted in the mounting cavity. The mounting bracket is located between the electrode assembly and the inner bottom wall of the shell, and the connecting piece connects the negative tab of the electrode assembly and the inner bottom wall of the shell.

10. The battery of claim 9, wherein, The tab connecting piece is connected to the side of the mounting bracket away from the inner bottom wall of the shell.

11. The battery according to any one of claims 1 to 10, characterized in that, The mounting bracket is fixedly connected with the shell.

12. The battery of claim 11, wherein, The connecting piece comprises an electrode connecting piece connected with the shell and a tab connecting piece connected with the tab, the part of the mounting bracket connected with the shell being made of metal, and the part of the mounting bracket in contact with the tab connecting piece being made of insulating material.

13. The battery of claim 11, wherein, The mounting bracket is made of metal, and the battery further comprises an insulating part arranged between the tab connecting piece and the mounting bracket.

14. The battery of claim 11, wherein, The connection between the mounting bracket and the shell is provided with an encapsulation part.

15. The battery of any one of claims 4 to 10, wherein, A plurality of electrode connecting pieces are uniformly distributed along the axial direction of the mounting bracket; and / or, the central angle of the electrode connecting piece is greater than or equal to 30°.

16. The battery of any one of claims 4 to 10, wherein, Along the radial direction of the shell, the length of the tab connecting piece is L1, the connecting length of the electrode connecting piece and the tab connecting piece is H3, and the ratio of H3 to L1 is between 0.1 and 0.

9.

17. The battery of any one of claims 4 to 10, wherein, The battery further comprises an encapsulation part, at least part of the encapsulation part being arranged at the connection between the electrode connecting piece and the tab connecting piece.

18. The battery of claim 17, wherein, Along the radial direction of the shell, a first end of the encapsulation part extends to be connected with the tab connecting piece, and a second end of the encapsulation part extends to be connected with the electrode connecting piece.

19. The battery of claim 18, wherein, The connection length of the encapsulation part and the tab connector is H4 along the radial direction of the shell, and H4≥0.2mm.

20. The battery of claim 17, wherein, The electrode connector comprises a first connection section and a third connection section connected in sequence, the first connection section is connected with the tab connector, and the third connection section protrudes or is bent away from the tab connector.

21. The battery of claim 20, wherein, The side of the third connection section close to the side wall surface of the shell is provided with the encapsulation part between the tab connector.

22. The battery of claim 17, wherein, The encapsulation part protrudes from the tab connector along the radial direction of the shell.

23. An electrical device, comprising: A battery comprising any one of the cells of claims 1 to 22.

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