Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment. The battery comprises a connecting piece and a packaging part, the connecting piece is provided with an electrode leading-out part and a tab connecting part, the electrode leading-out part is used for connecting an electrode of the battery, and the tab connecting part is used for connecting a tab of the battery; wherein at least part of the structure of the packaging part is arranged at the joint of the electrode leading-out part and the tab connecting part, and / or at least part of the structure of the packaging part is arranged at the joint of the electrode leading-out part and the electrode of the battery. According to the battery provided by the invention, the connection stability between the tabs of the battery and the electrodes of the battery is further improved.

Description

[0001] Cross-reference of related applications

[0002] This application requires filing with the Chinese Patent Office on December 9, 2024, application number [Application Number Missing].

[0003] Priority is claimed in Chinese patent application No. 202423033318.8, the entire contents of which are incorporated herein by reference. Technical Field

[0004] This application relates to the field of battery technology, specifically to batteries and electrical equipment. Background Technology

[0005] Batteries are widely used in energy storage systems, transportation, and consumer electronics. The battery's tabs and electrodes need to be connected together using a connection structure.

[0006] In related technologies, the stability of the connection between the battery tabs and the battery electrodes still needs to be improved. Utility Model Content

[0007] Embodiments of this application provide a battery and electrical device that can improve the technical problem of insufficient stability in the connection between the casing and the electrode tabs.

[0008] In a first aspect, embodiments of this application provide a battery, including a housing, an electrode assembly, a connector, and an encapsulation portion. The electrode assembly is installed in the internal space of the housing, and the connector has an electrode lead-out portion and a tab connection portion. The electrode lead-out portion is used to connect to the electrodes of the battery, and the tab connection portion is used to connect to the tabs of the battery.

[0009] Wherein, at least a portion of the encapsulation portion is disposed at the connection between the electrode lead-out portion and the tab connection portion, and / or at least a portion of the encapsulation portion is disposed at the connection between the electrode lead-out portion and the electrode of the battery.

[0010] In one embodiment, the electrodes of the battery include a battery casing or battery terminals.

[0011] In one embodiment, the connector includes an electrode connector and a tab connector connected in sequence, the electrode connector having an electrode lead-out portion and the tab connector having a tab connection portion.

[0012] In one embodiment, the encapsulation portion is provided at the connection between the electrode connector and the electrode of the battery; and / or,

[0013] The encapsulation portion is provided at the connection between the electrode connector and the tab connector; and / or,

[0014] The electrode connector and the tab connector are simultaneously in contact with the encapsulation portion; and / or

[0015] The electrode connector and the battery electrode are simultaneously in contact with the encapsulation part.

[0016] In one embodiment, the battery includes a housing, and the encapsulation portion is provided at the connection between the electrode connector and the housing.

[0017] In one embodiment, the encapsulation portion extends to and abuts against the side wall of the housing.

[0018] In one embodiment, the tab connector is spaced apart from the housing.

[0019] In one embodiment, the length of the tab connector is L1 along the radial direction of the housing, and the diameter of the housing is L2, wherein the ratio of L1 to L2 is between 0.01 and 0.99.

[0020] In one embodiment, the distance between the tab connector and the housing along the radial direction of the housing is L3, where L1+2L3≤L2.

[0021] In one embodiment, along the axial direction of the housing, the height of the fixed connection portion between the electrode connector and the housing is L6, and the height of the contact portion between the electrode connector and the housing is L7. <L6≤L7≤15mm。

[0022] In one embodiment, the length of the fixed connection portion between the electrode connector and the tab connector along the radial direction or along the axial direction of the housing is less than the length of the contact portion between the electrode connector and the tab connector.

[0023] In one embodiment, along the radial direction of the housing, the length of the fixed connection portion between the electrode connector and the tab connector is L8, and the ratio of L8 to L1 is between 0.05 and 0.5.

[0024] In one embodiment, the thickness of the electrode connector is between 0.05 mm and 2 mm.

[0025] In one embodiment, the thickness of the tab connector is between 0.05 mm and 2 mm.

[0026] In one embodiment, the thickness of the housing is between 0.2 mm and 1 mm.

[0027] In one embodiment, at least one of the tab connector and the electrode connector has a hardness between HV 50 and HV 120.

[0028] In one embodiment, at least one of the tab connector and the electrode connector has a tensile strength greater than 180 MPa.

[0029] In one embodiment, the impedance of at least one of the tab connector and the electrode connector is less than 2mΩ.

[0030] In one embodiment, the shell hardness is between HV 80 and HV 200; and / or, the shell tensile strength is between 240 MPa and 600 MPa; and / or, the shell impedance is less than 2 mΩ.

[0031] In one embodiment, the electrode connector includes a first side and a second side disposed opposite to each other, the first side being connected to the housing, and the electrode tab connector being connected to the second side.

[0032] In one embodiment, a first end of the electrode connector is connected to the tab connector, a second end of the electrode connector protrudes from the tab connector, and a receiving space is formed between the second end of the electrode connector and the tab connector, and / or between the first end of the electrode connector and the tab connector, the receiving space being used to receive the encapsulation portion.

[0033] In one embodiment, a portion of the electrode connector is stacked on one side of the tab connector.

[0034] In one embodiment, at least two of the electrode connectors, along the radial direction of the housing, have at least two different contact portions with the tab connector of different lengths.

[0035] In one embodiment, the electrode connector includes a first connecting segment and a second connecting segment, the second connecting segment connecting the first connecting segment and the housing, and the second end of the first connecting segment protruding or bending away from the electrode connector relative to the first end of the first connecting segment.

[0036] The receiving space is formed between the first end of the first connecting segment and the electrode connector, and / or between the second end of the first connecting segment and the electrode connector.

[0037] In one embodiment, the encapsulation portion is provided at the connection between the first connecting segment and the second connecting segment; or, the encapsulation portion is provided at least part of the first connecting segment; or, the encapsulation portion is provided at least part of the second connecting segment; or, the encapsulation portion is provided between the second connecting segment and the housing.

[0038] In one embodiment, the second connecting segment is located on the side of the first connecting segment opposite to the inner bottom wall of the housing.

[0039] In one embodiment, the electrode connector further includes a third connecting segment that connects the first connecting segment and the second connecting segment.

[0040] In one embodiment, the encapsulation portion is provided at the connection between the third connecting segment and the first connecting segment; or, the encapsulation portion is provided at the connection between the third connecting segment and the second connecting segment; or, the encapsulation portion is provided at least part of the third connecting segment.

[0041] In one embodiment, the length of the tab connector is L1 along the radial direction of the housing, and the diameter of the housing is L2, wherein the ratio of L1 to L2 is between 0.1 and 0.95.

[0042] In one embodiment, the distance between the end of the tab connector and the inner wall surface of the housing along the radial direction of the housing is L10, wherein...

[0043] The second connecting segment has a first surface facing the first connecting segment, the intersection line of the extended surface of the first surface and the side wall surface of the housing is a first intersection line, the tab connector has a second surface facing away from the first connecting segment, the intersection line of the extended surface of the second surface and the side wall surface of the housing is a second intersection line, the vertical distance between the first intersection line and the second intersection line is L11, L10≤L11; and / or,

[0044] Along the radial direction of the housing, the length of the contact portion between the electrode connector and the tab connector is L9, where L10 ≤ L9.

[0045] In one embodiment, the electrode connector includes a first electrode connector and a second electrode connector, the first electrode connector being connected to the end of the second electrode connector, the second electrode connector being used to connect the electrode, and the electrode connector being connected to the side of the first electrode connector opposite to the second electrode connector.

[0046] In one embodiment, the first electrode connector and the housing are spaced apart.

[0047] In one embodiment, the intersection line between the extended surface of the second tab connector facing away from the electrode connector and the side wall surface of the housing is the third intersection line, and the intersection line between the end face of the electrode connector facing the second tab connector and the side wall surface of the housing is the fourth intersection line. The vertical distance between the third intersection line and the fourth intersection line is greater than 0.12 mm.

[0048] In one embodiment, along the axial direction of the housing, the height of the electrode connector is less than the height of the first tab connector, wherein,

[0049] The encapsulation portion is provided between the first end of the first tab connector and the first end of the electrode connector; and / or,

[0050] An encapsulation space is formed between the second end of the first tab connector and the second end of the electrode connector, the encapsulation space being used to accommodate the encapsulation portion.

[0051] In one embodiment, along the radial direction of the housing, the orthographic projection of the first electrode connector onto the side wall of the housing at least partially coincides with the orthographic projection of the electrode connector onto the side wall of the housing; or,

[0052] Along the radial direction of the housing, the orthographic projection of the electrode connector onto the side wall of the housing lies within the orthographic projection of the first tab connector onto the side wall of the housing.

[0053] In one embodiment, a receiving groove is formed on the side of the first electrode connector near the side wall of the housing, a portion of the electrode connector is located in the receiving groove, and another portion of the electrode connector protrudes from the receiving groove and is connected to the housing.

[0054] In one embodiment, a gap is provided between the electrode lead-out portion and the side wall of the receiving groove, and the encapsulation portion is at least partially disposed within the gap; and / or, an encapsulation portion is provided between the side wall surfaces of the electrode connector and the tab connector facing the side wall of the housing.

[0055] In one embodiment, the thickness of the electrode connector along the radial direction of the housing is less than the thickness of the first tab connector.

[0056] In one embodiment, the encapsulation portion is provided on the side of the first electrode connector near the center of the housing.

[0057] In one embodiment, the contact area between the tab connector and the tab is S1, the welding area between the tab connector and the tab is s1, and the current-carrying capacity per unit area of ​​metal at the contact position between the tab connector and the tab is I1; the contact area between the tab connector and the electrode connector is S2, the welding area between the tab connector and the electrode connector is s2, and the current-carrying capacity per unit area of ​​metal at the contact position between the tab connector and the electrode connector is I2; the contact area between the electrode connector and the housing is S3, the welding area between the electrode connector and the housing is s3, and the current-carrying capacity per unit area of ​​metal at the contact position between the electrode connector and the housing is I3; the current-carrying requirement of the battery is a; wherein,

[0058] S1≥a / I1, S2≥a / I2, S3≥a / I3; and / or,

[0059] s1 / S1=10%-90%, s2 / S2=10%-90%, s3 / S3=10%-90%.

[0060] In one embodiment, the connector includes a plurality of electrode connectors, each electrode connector being an arc-shaped block. The plurality of electrode connectors are coaxial, and the sum of the arc lengths of the two sides of the electrode connector and the arc length of the outer wall surface is R1. The height of the contact portion between the electrode connector and the housing is H1, wherein R1×H1≥a / I2.

[0061] In one embodiment, the battery further includes a mounting bracket fixed inside the housing, the connector being mounted on the mounting bracket, and the mounting bracket supporting the connector.

[0062] In one embodiment, the connector includes an electrode connector connected to the housing and an electrode tab connector connected to the electrode tab. The mounting bracket forms a limiting portion, the electrode tab connector is fixedly connected to one side of the mounting bracket, and the electrode lead-out portion is disposed on the limiting portion.

[0063] In one embodiment, the limiting part includes a limiting groove with a connecting hole, and the electrode connector includes a first end and a second end disposed opposite to each other. The first end of the electrode connector passes through the connecting hole and is connected to the tab connector, and the second end of the electrode connector passes through the opening of the limiting groove and is connected to the housing.

[0064] In one embodiment, the limiting groove is filled with the encapsulation portion.

[0065] In one embodiment, the housing has a mounting cavity;

[0066] The housing has a recessed portion that protrudes into the mounting cavity. The connector is located between the recessed portion and the electrode assembly, and the connector connects the recessed portion and the positive electrode tab of the electrode assembly.

[0067] In one embodiment, the housing has a mounting cavity;

[0068] The connector is located between the electrode assembly and the inner bottom wall of the housing, and the connector connects the negative electrode tab of the electrode assembly and the inner bottom wall of the housing.

[0069] In one embodiment, the tab connector is spaced apart from the recessed portion.

[0070] In one embodiment, the connector includes a tab connector connected to the tab, and the tab connector has a clearance space formed on the side facing the recessed portion. The clearance space is used to accommodate the recessed portion so that the recessed portion and the tab connector are spaced apart.

[0071] In one embodiment, the tab connector has a clearance groove formed on the side facing the recessed portion, the clearance groove being used to accommodate the recessed portion so that the recessed portion and the tab connector are spaced apart.

[0072] In one embodiment, the battery further includes a cover plate, and the connector is electrically connected to the cover plate.

[0073] In one embodiment, the cover plate and the housing are insulated from each other.

[0074] In one embodiment, the encapsulation portion is an encapsulating adhesive or a thermoplastic film.

[0075] In one embodiment, the encapsulation portion has an irregular shape.

[0076] In one embodiment, the thickness of the encapsulation portion is uniform along the axial direction or the radial direction of the battery.

[0077] In one embodiment, the thickness of the encapsulation portion is uneven along the axial direction or the radial direction of the battery.

[0078] In one embodiment, the thickness of the encapsulation portion is between 1 mm and 2 mm along the axial direction or radial direction of the battery.

[0079] In one embodiment, the encapsulation portion includes an encapsulation layer and an insulating protective layer, wherein,

[0080] The encapsulation layer is disposed at the connection between the electrode lead-out portion and the tab connection portion, and the encapsulation layer is located on the side of the encapsulation layer opposite to the connection between the electrode lead-out portion and the tab connection portion; or...

[0081] The encapsulation layer is disposed at the connection between the electrode lead and the electrode of the battery, and the insulating protective layer is connected to the side of the encapsulation layer opposite to the connection between the electrode lead and the electrode.

[0082] In one embodiment, the encapsulation portion protrudes from the connection between the electrode lead-out portion and the tab connection portion.

[0083] In one embodiment, the length of the encapsulation portion protruding from the connection between the electrode lead-out portion and the tab connection portion along the axial direction of the housing is between 0 mm and 4 mm.

[0084] In one embodiment, the encapsulation portion protrudes from the connection point between the electrode lead-out portion and the electrode of the battery.

[0085] In one embodiment, the length of the encapsulation portion protruding from the connection point between the electrode lead and the battery electrode along the axial direction of the housing is between 0 mm and 4 mm.

[0086] In one embodiment, the connector has a symmetrical structure.

[0087] In one embodiment, one of the battery casing, the electrode lead-out portion, and the tab connection portion is a first metal component, and the other two are second metal components. The first metal component and the second metal component are made of different metal materials, and the encapsulation portion is provided at the connection between the first metal component and the second metal component.

[0088] In one embodiment, the electrode lead-out portion and the electrode tab connection portion are both the second metal component, the housing is the first metal component, and the encapsulation portion is provided at the connection between the electrode lead-out portion and the housing.

[0089] In one embodiment, the electrode lead-out portion and the housing are both the second metal component, the tab connection portion is the first metal component, and the encapsulation portion is provided at the connection between the electrode lead-out portion and the tab connection portion.

[0090] Secondly, embodiments of this application provide an electrical device including the battery described above.

[0091] The beneficial effects of the embodiments of this application are as follows:

[0092] In the embodiments of this application, by providing an encapsulation portion at the connection between the electrode lead and the tab connection portion, the encapsulation portion can prevent impurities from entering the connection between the electrode lead and the tab connection portion, avoiding impurities affecting the connection strength between the electrode lead and the tab connection portion, improving the connection stability between the electrode lead and the tab connection portion, improving the structural stability of the connector, and thus improving the connection stability between the battery tab and the battery electrode. By providing an encapsulation portion at the connection between the electrode lead and the electrode, the encapsulation portion can prevent impurities from entering the connection between the electrode lead and the electrode, avoiding impurities affecting the connection strength between the electrode lead and the electrode, improving the connection stability between the electrode lead and the electrode, and thus improving the connection stability between the battery tab and the battery electrode. Attached Figure Description

[0093] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0094] Figure 1 This is one of the structural schematic diagrams of the battery provided in the embodiments of this application;

[0095] Figure 2 This is one of the partial structural schematic diagrams of a battery provided in an embodiment of this application;

[0096] Figure 3 This is provided by the embodiments of this application. Figure 2 A schematic diagram of the structure after it has been formed;

[0097] Figure 4 This is a second schematic diagram of the battery structure provided in the embodiments of this application;

[0098] Figure 5 This is a second schematic diagram of a partial structure of a battery provided in an embodiment of this application;

[0099] Figure 6 This is provided by the embodiments of this application. Figure 5 A schematic diagram of the structure after it has been formed;

[0100] Figure 7 This is the third partial structural schematic diagram of the battery provided in the embodiments of this application;

[0101] Figure 8 This is provided by the embodiments of this application. Figure 7 The diagram shows the structure after it has been formed.

[0102] Figure 9 This is the fourth partial structural schematic diagram of the battery provided in the embodiments of this application;

[0103] Figure 10 This is provided by the embodiments of this application. Figure 9 A schematic diagram of the structure after it has been formed;

[0104] Figure 11 This is the fifth partial structural schematic diagram of the battery provided in the embodiments of this application;

[0105] Figure 12 This is the sixth partial structural schematic diagram of the battery provided in the embodiments of this application;

[0106] Figure 13 This is provided by the embodiments of this application. Figure 12 The diagram shows the structure after it has been formed.

[0107] Figure 14 This is one of the partial structural diagrams of a battery with a mounting bracket provided in an embodiment of this application;

[0108] Figure 15 This is a second schematic diagram of a partial structure of a battery with a mounting bracket provided in an embodiment of this application;

[0109] Figure 16 This is one of the structural schematic diagrams of the tab connection portion provided in the embodiments of this application;

[0110] Figure 17 This is a second schematic diagram of the structure of the tab connection portion provided in an embodiment of this application;

[0111] Figure 18 This is a schematic diagram of the packaging section provided in an embodiment of this application. Detailed Implementation

[0112] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0113] The following is combined Figures 1 to 18 This application describes the battery and electrical device.

[0114] According to the embodiments of the first aspect of this application, see [link / reference]. Figure 1 The battery includes a housing 1, an electrode assembly connector 2, and an encapsulation part 3. The electrode assembly is installed in the internal space of the housing 1. The connector 2 has an electrode lead-out part 201 and a tab connection part 202. The electrode lead-out part 201 is used to connect the electrodes of the battery, and the tab connection part 202 is used to connect the tabs of the battery.

[0115] At least a portion of the encapsulation portion 3 is disposed at the connection between the electrode lead-out portion 201 and the tab connection portion 202, and / or at least a portion of the encapsulation portion 3 is disposed at the connection between the electrode lead-out portion 201 and the electrode of the battery.

[0116] According to the battery embodiment of this application, by providing an encapsulation part 3 at the connection between the electrode lead 201 and the tab connection 202, the encapsulation part 3 can prevent impurities from entering the connection between the electrode lead 201 and the tab connection 202, avoiding impurities from affecting the connection strength between the electrode lead 201 and the tab connection 202, improving the connection stability between the electrode lead 201 and the tab connection 202, improving the structural stability of the connector 2, and thus improving the connection stability between the battery tab and the battery electrode. By providing an encapsulation part 3 at the connection between the electrode lead 201 and the electrode, the encapsulation part 3 can prevent impurities from entering the connection between the electrode lead 201 and the electrode, avoiding impurities from affecting the connection strength between the electrode lead 201 and the electrode, improving the connection stability between the electrode lead 201 and the electrode, and thus improving the connection stability between the battery tab and the battery electrode.

[0117] For example, the electrode assembly includes at least a core.

[0118] In some embodiments, the electrodes of the battery include the battery casing or battery terminals.

[0119] Understandably, when the battery electrode is the battery casing, the electrode lead-out portion 201 is connected to the battery casing, that is, the connector 2 connects the battery casing and the battery tabs. When the battery electrode is the battery terminal, the electrode lead-out portion 201 is connected to the battery terminal, that is, the connector 2 connects the battery terminal and the battery tabs.

[0120] In some examples, the impurity is, for example, the electrolyte.

[0121] In some embodiments, the connector 2 includes an electrode connector 22 and a tab connector 23 connected in sequence. The electrode connector 22 has an electrode lead-out portion 201, and the tab connector 23 has a tab connection portion 202.

[0122] Understandably, electrode connector 22 can be connected to the battery electrode, and tab connector 23 can be connected to the battery tab, thereby connecting the battery electrode and the battery tab together.

[0123] In some examples, the electrode connector 22 has an electrode lead-out portion 201, which may mean that part of the structure of the electrode connector 22 is the electrode lead-out portion 201, or that the entire structure of the electrode connector 22 is the electrode lead-out portion 201.

[0124] In some examples, the tab connector 23 has a tab connection portion 202, which may refer to a part of the structure of the tab connector 23 being the tab connection portion 202, or the entire structure of the tab connector 23 being the tab connection portion 202.

[0125] In some examples, the encapsulation part 3 is provided at least part of the connector 2. The encapsulation part 3 may be provided at the bend of the connector 2, or the entire connector 2 may be provided with the encapsulation part 3, or the encapsulation part 3 may be provided at the end of the connector 2 that connects to the housing 1.

[0126] In some examples, at least a portion of the encapsulation portion 3 is disposed at the connection between the connector 2 and the housing 1. This means that a portion of the encapsulation portion 3 is disposed at the connection between the connector 2 and the housing 1, while another portion of the encapsulation portion 3 is disposed at other locations on the connector 2.

[0127] In some examples, at least a portion of the encapsulation part 3 is provided at the connection between the connector 2 and the housing 1. This can mean that the encapsulation part 3 is provided around the connection between the connector 2 and the housing 1, or that the encapsulation part 3 is provided covering the connection between the connector 2 and the housing 1.

[0128] In some examples, the encapsulation part 3 is, for example, an encapsulating adhesive, the material of which is polyurethane, epoxy resin, anaerobic adhesive, UV adhesive, acrylic, hot melt adhesive, etc., and the elastic modulus of the encapsulating adhesive is between 0.1 GPa and 6 GPa.

[0129] Specifically, an encapsulation part 3 is provided at the connection between the electrode connector 22 and the battery electrode.

[0130] It is understandable that by providing an encapsulation part 3 at the connection between the electrode connector 22 and the battery electrode, the encapsulation part 3 can prevent the connection between the electrode connector 22 and the battery electrode from contacting other substances, thus avoiding the influence of other substances on the connection strength between the electrode connector 22 and the battery electrode, ensuring the connection strength between the electrode connector 22 and the electrode, improving the stability of the connection between the electrode connector 22 and the electrode, and thereby enabling the connector 2 to stably connect the electrode and the tab, improving the stability of the connection between the electrode and the tab.

[0131] Specifically, an encapsulation part 3 is provided at the connection between the electrode connector 22 and the tab connector 23.

[0132] It is understandable that by providing an encapsulation part 3 at the connection between the electrode connector 22 and the tab connector 23, the encapsulation part 3 can prevent the connection between the electrode connector 22 and the tab connector 23 from contacting other substances, thus avoiding the connection strength between the electrode connector 22 and the tab connector 23 being affected by other substances, ensuring the connection strength between the electrode connector 22 and the tab connector 23, improving the structural stability of the connector 2, and thereby enabling the connector 2 to stably connect the battery electrode and the tab, improving the stability of the connection between the battery electrode and the tab.

[0133] Specifically, the electrode connector 22 and the tab connector 23 simultaneously contact the encapsulation part 3.

[0134] Understandably, at the connection between electrode connector 22 and tab connector 23, a portion of the encapsulation part 3 contacts electrode connector 22, and another portion of the encapsulation part 3 contacts tab connector 23. This ensures that the encapsulation part 3 can effectively encapsulate the connection between electrode connector 22 and tab connector 23, effectively preventing impurities from entering the connection between electrode connector 22 and tab connector 23, and improving the connection stability of electrode connector 22 and tab connector 23.

[0135] For example, the encapsulation part 3 has at least two connecting surfaces. At the connection between the electrode connector 22 and the tab connector 23, one of the connecting surfaces of the encapsulation part 3 contacts the electrode connector 22, and the other connecting surface of the encapsulation part 3 contacts the tab connector 23.

[0136] Specifically, the electrode connector 22 and the battery electrode are in contact with the encapsulation part 3 at the same time.

[0137] Understandably, at the connection between the electrode connector 22 and the battery electrode, a portion of the encapsulation part 3 contacts the electrode connector 22, and another portion of the encapsulation part 3 contacts the electrode. This ensures that the encapsulation part 3 can effectively encapsulate the connection between the electrode connector 22 and the electrode, effectively preventing impurities from entering the connection between the electrode connector 22 and the electrode, and improving the connection stability between the electrode connector 22 and the electrode.

[0138] For example, the encapsulation part 3 has at least two connection surfaces. At the connection between the electrode connector 22 and the electrode, one of the connection surfaces of the encapsulation part 3 contacts the electrode connector 22, and the other connection surface of the encapsulation part 3 contacts the electrode.

[0139] In some embodiments, the battery includes a housing 1, and an encapsulation portion 3 is provided at the connection between the electrode connector 22 and the housing 1.

[0140] It is understandable that the encapsulation part 3 can prevent impurities from entering the connection between the electrode connector 22 and the housing 1, and avoid impurities affecting the connection strength between the electrode connector 22 and the housing 1.

[0141] Specifically, the encapsulation part extends to the side wall of the housing and abuts against the side wall of the housing, so that the encapsulation part can effectively encapsulate the connection between the electrode connector 22 and the housing 1, preventing impurities from entering the connection between the electrode connector 22 and the housing 1.

[0142] In some embodiments, the tab connector 23 is spaced apart from the housing 1.

[0143] It is understandable that the tab connector 23 is spaced apart from the housing 1, and the tab connector 23 will not directly contact the housing 1, which reduces the connection points between the connector 2 and the housing 1 and avoids corrosion and other problems caused by the tab connector 23 contacting the housing 1.

[0144] In some examples, electrode connector 22 is connected to tab connector 23 by surface chemical treatment methods, such as electroplating, electroless plating, or spraying. It can also be connected to tab connector 23 by surface physical treatment methods, such as composite metal stamping.

[0145] In some examples, the tab connector 23 and the electrode connector 22 can be connected together by welding, cold heading, hot bonding, jointing, riveting, heat shrink tubing, etc. The electrode connector 22 and the housing 1 can be connected by laser welding, spot welding, resistance welding, etc.

[0146] In some examples, the tab connector 23 includes a first contact surface that contacts the electrode connector 22, and the electrode connector 22 includes a second contact surface that contacts the tab connector 23. The first and / or second contact surfaces are provided with raised / grooved / rough / embossed structures to increase the contact area between the tab connector 23 and the electrode connector 22.

[0147] In some examples, the tab connector 23 is made of copper, for example, and the electrode connector 22 is made of nickel-plated steel strip, nickel strip, or stainless steel, for example.

[0148] In some embodiments, one of the battery casing 1, electrode lead-out portion 201, and electrode tab connection portion 202 is a first metal component, and the other two are second metal components. The first metal component and the second metal component are made of different metal materials, and an encapsulation portion 3 is provided at the connection between the first metal component and the second metal component. Where the first metal material and the second metal material are different, the first metal material and the second metal material are used.

[0149] It is understandable that by providing an encapsulation part 3 at the connection between the first metal part and the second metal part, that is, by providing an encapsulation part 3 at the contact position of different metal materials, the encapsulation part 3 can prevent the connection between the first metal part and the second metal part from contacting other substances (such as electrolyte), making the connection between the first metal part and the second metal part less prone to corrosion, thereby improving the structural stability of the connector 2 or the connection between the connector 2 and the housing 1, so that the connector 2 can stably connect the housing 1 and the tab.

[0150] It is understandable that the housing 1, the electrode lead-out part 201 and the electrode tab connection part 202 include two different metal materials, which can effectively ensure the stability of the connection between the connection part 21 and the housing 1.

[0151] For example, the first metal part is made of a first metal material, and the second metal part is made of a second metal material, and the first metal material and the second metal material are different.

[0152] It should be noted that a metallic material consists of multiple metal atoms. Two metallic materials each consist of two sets of metal atoms. If even one metal atom in one set differs from the other, the two metallic materials can be considered different. In other words, if the first and second metallic materials do not have completely identical metal atoms—meaning they differ by even one metal atom—they can be considered different.

[0153] The metal material can be pure metal, alloy, or metal-based composite material with one or more insoluble solid particles added.

[0154] Metallic materials can have a multi-layered structure. For example, a metallic material may include a substrate and a metal layer disposed on the substrate. The metal layer can be formed on the substrate by methods such as electroplating or CVD. The metal layer can be a pure metal, an alloy, or a metal-based composite material with one or more insoluble solid particles added.

[0155] Specifically, the electrode lead-out portion 201 and the electrode tab connection portion 202 are both second metal parts, the housing 1 is a first metal part, and an encapsulation portion 3 is provided at the connection between the electrode lead-out portion 201 and the housing 1.

[0156] It is understandable that the electrode lead-out portion 201 and the housing 1 are made of different metal materials. By providing an encapsulation portion 3 at the connection between the electrode lead-out portion 201 and the housing 1, the encapsulation portion 3 can prevent the connection between the electrode lead-out portion 201 and the housing 1 from contacting other substances. This makes it less likely for corrosion to occur at the connection between the electrode lead-out portion 201 and the housing 1, i.e., the connection between different metal materials. This improves the connection stability between the electrode lead-out portion 201 and the housing 1, so that the connector 2 can stably connect the housing 1 and the electrode tab.

[0157] Specifically, the electrode lead-out portion 201 and the housing 1 are both second metal parts, the electrode tab connection portion 202 is a first metal part, and an encapsulation portion 3 is provided at the connection between the electrode lead-out portion 201 and the electrode tab connection portion 202.

[0158] It is understandable that the electrode lead-out portion 201 and the tab connection portion 202 are made of different metal materials. By providing an encapsulation portion 3 at the connection between the electrode lead-out portion 201 and the tab connection portion 202, the encapsulation portion 3 can prevent the connection between the electrode lead-out portion 201 and the tab connection portion 202 from contacting other substances. This makes the connection between the electrode lead-out portion 201 and the tab connection portion 202, i.e., the connection between different metal materials, less prone to corrosion. This improves the connection stability between the electrode lead-out portion 201 and the tab connection portion 202, and improves the structural stability of the connector 2, so that the connector 2 can stably connect the housing 1 and the tab.

[0159] In some embodiments, see Figure 2 and Figure 4 Along the radial direction of the housing 1, the length of the tab connector 23 is L1, and the diameter of the housing 1 is L2, wherein the ratio of L1 to L2 is between 0.01 and 0.99.

[0160] Understandably, when the ratio of the length of the tab connector 23 to the diameter of the housing 1 is less than 0.01, the length of the tab connector 23 is too short, which is not conducive to the connection between the tab connector 23 and the tab, nor to the connection between the tab connector 23 and the electrode connector 22. When the ratio of the length of the tab connector 23 to the diameter of the housing 1 is greater than 0.99, the distance between the tab connector 23 and the housing 1 is small, and the tab connector 23 is prone to contact with the housing 1. Therefore, this application sets the ratio of the length of the tab connector 23 to the diameter of the housing 1 between 0.01 and 0.99, ensuring the connection between the tab and the electrode connector 22 and the tab connector 23, while also leaving a sufficiently large gap between the tab connector 23 and the housing 1 to prevent direct contact between the tab connector 23 and the housing 1, thus avoiding corrosion caused by contact between the tab connector 23 and the housing 1.

[0161] In some embodiments, see Figure 2 and Figure 5 Along the radial direction of the housing 1, the distance between the tab connector 23 and the housing 1 is L3, where L1+2L3≤L2.

[0162] It is understandable that a gap L3 is provided between the tab connector 23 and the housing 1, so that the tab connector 23 and the housing 1 are spaced apart, thus avoiding direct contact between the tab connector 23 and the housing 1.

[0163] When L1 + 2L3 > L2, it means that the length of the connector 2 along the radial direction of the housing 1 is greater than the diameter of the housing 1. During battery production, this may lead to deformation of the housing 1 or breakage of the connector 2, affecting the quality of the battery. Therefore, this application sets the sum of L1 + 2L3 to be less than or equal to L2, so that there is no interference between the connector 2 and the housing 1, thus ensuring the quality of the battery.

[0164] Along the radial direction of the housing 1, both ends of the tab connector 23 are connected to electrode connectors 22. In order to avoid direct contact between the tab connector 23 and the housing 1, at least part of the electrode connector 22 will protrude from the tab connector 23, that is, at least part of the electrode connector 22 is located between the tab connector 23 and the inner wall surface of the housing 1.

[0165] In some embodiments, see Figure 4 The electrode connector 22 includes a first side 221 and a second side 222 disposed opposite to each other. The first side 221 is connected to the housing 1, and the electrode tab connector 23 is disposed at the second side 222.

[0166] It is understandable that one side of the electrode connector 22 is connected to the housing 1 and the other side is connected to the tab connector 23, so that the electrode connector 22 and the tab connector 23 can connect the housing 1 and the tab.

[0167] The tab connector 23 is connected to the side of the electrode connector 22 away from the housing 1, which can prevent the tab connector 23 from directly contacting the housing 1 and thus avoid corrosion at the connection between the tab connector 23 and the housing 1.

[0168] In some embodiments, see Figure 4 Along the axial direction of the housing 1, the height of the fixed connection part between the electrode tab connector 23 and the second side 222 is L4, and the height of the contact part between the electrode tab connector 23 and the second side 222 is L5, where L4≤L5.

[0169] It is understood that if the second side 222 of the tab connector 23 and the electrode connector 22 are connected, then along the radial direction of the housing 1, the tab connector 23 and the second side 222 will at least partially overlap.

[0170] If L4 > L5, the height of the fixed connection portion between the tab connector 23 and the second side surface 222 will be greater than the contact portion between the tab connector 23 and the second side surface 222. The fixed connection portion will protrude from the contact portion, which is detrimental to the connection between the tab connector 23 and the electrode connector 22. Simultaneously, the required height of the encapsulation portion 3 also needs to be increased to cover the fixed connection portion, making it difficult for the encapsulation portion 3 to encapsulate the connection between the electrode connector 22 and the tab connector 23. Therefore, this application sets L4 to be less than or equal to L5, which facilitates the connection between the electrode connector 22 and the tab connector 23, while also preventing the fixed connection portion from protruding from the contact portion, thus facilitating the installation of the encapsulation portion 3.

[0171] It is understood that the tab connector 23 includes an end face that connects to the second side 222, and the part that is fixedly connected to the second side 222 is the fixed connection part. When L4 is less than L5, it means that there is a part of the end face that is not fixedly connected to the second side 222, that is, it only abuts against or is spaced apart from the second side 222.

[0172] In some examples, the electrode connector 22 and the tab connector 23 are fixedly connected by welding. The fixed connection part of the tab connector 23 and the second side 222 refers to the welding part of the tab connector 23 and the second side 222.

[0173] In some embodiments, see Figure 2 Along the axial direction of housing 1, the height of the fixed connection portion between electrode connector 22 and housing 1 is L6, and the height of the contact portion between electrode connector 22 and housing 1 is L7. <L6≤L7≤15mm。

[0174] Understandably, if L6 > L7, the height of the fixed connection portion between the electrode connector 22 and the housing 1 will be greater than the height of the contact portion between the electrode connector 22 and the housing 1. The fixed connection portion will protrude from the contact portion, which is detrimental to the connection between the electrode connector 22 and the housing 1. Simultaneously, the required height of the encapsulation part 3 also needs to be increased to cover the fixed connection portion, which is not conducive to the encapsulation part 3 sealing the connection between the electrode connector 22 and the housing 1. Therefore, this application sets L6 to be less than or equal to L7, which facilitates the connection between the electrode connector 22 and the housing 1, and also avoids the fixed connection portion protruding from the contact portion, thus facilitating the design of the encapsulation part 3.

[0175] L6 being greater than 0 ensures a secure connection between the electrode connector 22 and the housing 1. L7 being less than or equal to 15mm avoids significantly impacting the battery's size.

[0176] It is understood that the electrode connector 22 includes a side that connects to the housing 1, and the part of the side that is fixedly connected to the housing 1 is the fixed connection part. When L6 is less than L7, it means that there is a part of the side that is not fixedly connected to the housing 1, that is, it only abuts against or is spaced apart from the housing 1.

[0177] In some examples, the electrode connector 22 and the housing 1 are fixedly connected by welding. In this case, the fixed connection between the housing 1 and the electrode connector 22 refers to the welding part between the housing 1 and the electrode connector 22.

[0178] In some embodiments, the thickness of the electrode connector 22 is between 0.05 mm and 2 mm.

[0179] Understandably, when the thickness of the electrode connector 22 is less than 0.05 mm, the structural strength of the electrode connector 22 is low and it is easily damaged; when the thickness of the electrode connector 22 is greater than 2 mm, the thickness of the electrode connector 22 is too large, which can easily lead to an excessively large overall thickness of the connector 2, thereby affecting the size of the battery. Therefore, this application sets the thickness of the electrode connector 22 between 0.05 mm and 2 mm, ensuring the structural strength of the electrode connector 22, while also avoiding any impact on the overall thickness of the connector 2 and the size of the battery.

[0180] In some embodiments, the thickness of the tab connector 23 is between 0.05 mm and 2 mm.

[0181] Understandably, when the thickness of the tab connector 23 is less than 0.05mm, the structural strength of the tab connector 23 is low and it is easily damaged; when the thickness of the tab connector 23 is greater than 2mm, the thickness of the tab connector 23 is too large and may affect the height of the battery. Therefore, this application sets the thickness of the tab connector 23 between 0.05mm and 2mm to ensure the structural strength of the tab connector 23, while also avoiding any impact on the height of the battery.

[0182] In some embodiments, the thickness of the housing 1 is between 0.2 mm and 1 mm.

[0183] It is understandable that when the thickness of the casing 1 is less than 0.05 mm, the structural strength of the casing 1 is low and it is easily damaged; when the thickness of the casing 1 is greater than 2 mm, the thickness of the casing 1 is too large and it is easy to affect the size of the battery. Therefore, this application sets the thickness of the casing 1 between 0.05 mm and 2 mm to ensure the structural strength of the casing 1, while also avoiding any impact on the size of the battery.

[0184] In some embodiments, the hardness of the tab connector 23 is between HV 50 and HV 120; and / or, the tensile strength of the tab connector 23 is greater than 180 MPa; and / or, the impedance of the tab connector 23 is less than 2 mΩ, thereby ensuring the performance of the tab connector 23.

[0185] In some embodiments, the hardness of the electrode connector 22 is between HV 50 and HV 120; and / or, the tensile strength of the electrode connector 22 is greater than 180 MPa; and / or, the impedance of the electrode connector 22 is less than 2 mΩ, thereby ensuring the performance of the electrode connector 22.

[0186] In some embodiments, the hardness of the housing 1 is between HV 80 and HV 200; and / or, the tensile strength of the housing 1 is between 240 MPa and 600 MPa; and / or, the impedance of the housing 1 is less than 2 mΩ, thereby ensuring the performance of the housing 1.

[0187] It is understandable that HV stands for Vickers hardness.

[0188] In some embodiments, see Figure 2 and Figure 5 The first end of the electrode connector 22 is connected to the tab connector 23, and the second end of the electrode connector 22 protrudes from the tab connector 23. A receiving space 24 is formed between the second end of the electrode connector 22 and the tab connector 23, and / or between the first end of the electrode connector 22 and the tab connector 23. The receiving space 24 is used to receive the encapsulation part 3.

[0189] It is understood that a receiving space 24 can be formed between the first end of the electrode connector 22 and the tab connector 23, or a receiving space 24 can be formed between the second end of the electrode connector 22 and the tab connector 23. The receiving space 24 can accommodate the encapsulation part 3, thereby facilitating the placement of the encapsulation part 3 between the electrode connector 22 and the tab connector 23, so as to prevent impurities from entering the connector 2.

[0190] It is understood that the first end of the electrode connector 22 is connected to the tab connector 23, thus creating a connection point between the first end of the electrode connector 22 and the tab connector 23. Therefore, a receiving space 24 for accommodating the encapsulation portion 3 can be provided between the first end of the electrode connector 22 and the tab connector 23 to prevent corrosion at the connection point between the electrode connector 22 and the tab connector 23. The second end of the electrode connector 22 protrudes from the tab connector 23. That is, the structure of the connector 2 is such that it bends at the contact point between the second end of the electrode connector 22 and the tab connector 23. Therefore, a receiving space 24 for accommodating the encapsulation portion 3 can be formed between the second end of the electrode connector 22 and the tab connector 23 to prevent impurities from entering the connector 2.

[0191] In some embodiments, see Figure 2 and Figure 5 Part of the electrode connector 22 is stacked on one side of the tab connector 23.

[0192] It is understandable that some electrode connectors 22 are stacked on one side of the tab connector 23, so that a space is formed between the other part of the electrode connector 22 and the tab connector 23, and the other part of the electrode connector 22 can be bent toward the tab connector 23, thereby facilitating the bending and shaping of the connector 2.

[0193] In some examples, another portion of the electrode connector 22 is connected to the recessed portion 12 of the housing 1, and the recessed portion 12 of the housing 1 protrudes inward from the housing 1. That is, in the final formed battery, the other portion of the electrode connector 22 will be bent under the action of the recessed portion 12. In this application, a portion of the electrode connector 22 is stacked on one side of the tab connector 23, so that the other portion of the electrode connector 22 has bending space, thereby facilitating the forming of the connector 2 and the battery.

[0194] For details, please refer to Figure 2 and Figure 5 Along the axial direction of the housing 1, the electrode connector 22 and the tab connector 23 at least partially overlap;

[0195] Along the radial direction of the housing 1, the length of the fixed connection part between the electrode connector 22 and the tab connector 23 is L8, and the length of the contact part between the electrode connector 22 and the tab connector 23 is L9, where L8≤L9.

[0196] Understandably, if L8 > L9, the length of the fixed connection portion between the electrode connector 22 and the tab connector 23 will be greater than the length of the contact portion between them. The fixed connection portion will protrude from the contact portion, which is detrimental to the connection between the electrode connector 22 and the tab connector 23. Simultaneously, the length of the encapsulation portion 3 also needs to be increased to cover the fixed connection portion, making it difficult for the encapsulation portion 3 to properly encapsulate the connection between the electrode connector 22 and the tab connector 23. Therefore, this application sets L8 to be less than or equal to L9, which facilitates the connection between the electrode connector 22 and the tab connector 23 and also prevents the fixed connection portion from protruding from the contact portion, thus facilitating the design of the encapsulation portion 3.

[0197] It is understood that the electrode connector 22 includes a connecting surface that connects to the tab connector 23, and the part of the connecting surface that is fixedly connected to the tab connector 23 is the fixed connection part. When L8 is less than L9, it means that there is a part of the connecting surface that is not fixedly connected to the tab connector 23, that is, it only abuts against or is spaced apart from the tab connector 23.

[0198] In some examples, the electrode connector 22 and the tab connector 23 are fixedly connected by welding. The fixed connection part of the electrode connector 22 and the tab connector 23 refers to the welding part of the electrode connector 22 and the tab connector 23.

[0199] In some embodiments, at least two of the electrode connectors, along the radial direction of the housing, have contact portions with the tab connectors of different lengths.

[0200] In some embodiments, see Figure 2 and Figure 5The length of the tab connector 23 is L1, and L9 ≤ L1. When L9 is greater than L1, the structure of the electrode connector 22 needs to be extended and connected to the side wall of the tab connector 23, which makes the structure of the electrode connector 22 complex. Therefore, in this application, L9 is set to be less than or equal to L1.

[0201] In some embodiments, see Figure 2 , Figure 5 and Figure 6 The electrode connector 22 includes a first connecting segment 223 and a second connecting segment 224. The second connecting segment 224 connects the first connecting segment 223 and the housing 1. The second end of the first connecting segment 223 protrudes or bends away from the first end of the first connecting segment 223 in a direction away from the electrode connector 23.

[0202] It is understandable that the second end of the first connecting segment 223 protrudes or bends away from the tab connector 23, while the second connecting segment 224 is connected to the second end of the first connecting segment 223, thereby causing the second connecting segment 224 to protrude from the tab connector 23, which facilitates the connection between the second connecting segment 224 and the housing 1.

[0203] In some examples, the first end of the first connecting segment 223 is stacked on the tab connector 23.

[0204] Specifically, a receiving space 24 is formed between the first end of the first connecting segment 223 and the tab connector 23, so that the encapsulation part 3 can be disposed between the first end of the first connecting segment 223 and the tab connector 23, so that the encapsulation part 3 can prevent the contact position between the first end of the first connecting segment 223 and the tab connector 23 from contacting other substances, and can effectively prevent corrosion from occurring at the contact position between the first end of the first connecting segment 223 and the tab connector 23.

[0205] Specifically, a receiving space 24 is formed between the second end of the first connecting segment 223 and the tab connector 23, so that the encapsulation part 3 can be disposed between the second end of the first connecting segment 223 and the tab connector 23, so that the encapsulation part 3 can prevent the contact position between the second end of the first connecting segment 223 and the tab connector 23 from contacting other substances, and can effectively prevent corrosion from occurring at the contact position between the second end of the first connecting segment 223 and the tab connector 23.

[0206] In some embodiments, see Figure 2 An encapsulation part 3 is provided at the connection between the first connecting segment 223 and the second connecting segment 224.

[0207] It is understandable that by providing an encapsulation part 3 at the connection between the first connecting segment 223 and the second connecting segment 224, the encapsulation part 3 can prevent the connection between the first connecting segment 223 and the second connecting segment 224 from contacting other substances, thereby preventing corrosion at the connection between the first connecting segment 223 and the second connecting segment 224.

[0208] In some embodiments, at least a portion of the first connecting segment 223 is provided with an encapsulation portion 3.

[0209] It is understood that by providing the encapsulation part 3 at at least part of the first connecting segment 223, the position of the first connecting segment 223 where the encapsulation part 3 is provided can avoid contact with other substances under the action of the encapsulation part 3, making the position of the first connecting segment 223 where the encapsulation part 3 is provided less prone to corrosion, effectively slowing down the corrosion rate of the entire first connecting segment 223, improving the structural stability of the first connecting segment 223 and the connector 2, and thus improving the stability of the connection between the housing 1 and the electrode tab.

[0210] In some embodiments, at least a portion of the second connecting segment 224 is provided with an encapsulation portion 3.

[0211] It is understood that by providing the encapsulation part 3 at at least part of the second connecting segment 224, the location of the encapsulation part 3 on the second connecting segment 224 can avoid contact with other substances, making the location of the encapsulation part 3 on the second connecting segment 224 less prone to corrosion. This can effectively slow down the corrosion rate of the entire second connecting segment 224, improve the structural stability of the second connecting segment 224 and the connector 2, and thus improve the stability of the connection between the housing 1 and the tab.

[0212] In some embodiments, an encapsulation portion 3 is provided between the second connecting segment 224 and the housing 1.

[0213] It is understandable that the encapsulation part 3 can prevent impurities from entering the connection between the second connecting section 224 and the housing 1, and avoid impurities affecting the connection strength between the second connecting section 224 and the housing 1.

[0214] In some embodiments, the second connecting segment 224 is located on the side of the first connecting segment 223 away from the inner bottom wall of the housing 1. This creates a space between the second connecting segment 224 and the tab connector 23, allowing the second connecting segment 224 to be bent toward the tab connector 23, thereby facilitating the bending and shaping of the connector 2.

[0215] In some examples, the second connecting segment 224 is connected to the recessed portion 12 of the housing 1, and the recessed portion 12 of the housing 1 protrudes inward. That is, in the final formed battery, the second connecting segment 224 will bend under the action of the recessed portion 12. In this application, the first connecting segment 223 is located between the second connecting segment 224 and the inner bottom wall of the housing 1, so that the second connecting segment 224 has bending space, thereby facilitating the forming of the connector 2 and the battery.

[0216] In some embodiments, see Figure 5 , Figure 6 , Figure 7 and Figure 8 The electrode connector 22 further includes a third connecting segment 225, which connects the first connecting segment 223 and the second connecting segment 224. The first connecting segment 223 and the second connecting segment 224 are spaced apart, and a receiving cavity 226 is formed between the first connecting segment 223 and the second connecting segment 224 along the axial direction of the housing 1.

[0217] It is understandable that by connecting the first connecting segment 223 and the second connecting segment 224 through the third connecting segment 225, the distance between the second connecting segment 224 and the tab connector 23 is increased, so that a receiving cavity 226 is formed between the second connecting segment 224 and the tab connector 23 for the second connecting segment 224 to be bent, which facilitates the bending and shaping of the connector 2.

[0218] Understandably, the second connecting segment 224 connects to the inner portion of the housing 1. The third connecting segment 225 increases the distance between the second connecting segment 224 and the tab connector 23. When the inner portion protrudes into the housing 1, the third connecting segment 225 increases the distance between the inner portion and the tab connector 23, preventing them from contacting each other.

[0219] For example, the third connecting segment 225 can be a straight segment or a bent segment.

[0220] For details, please refer to Figure 5 Along the radial direction of the housing 1, the length of the tab connector 23 is L1, and the diameter of the housing 1 is L2, wherein the ratio of L1 to L2 is between 0.1 and 0.95.

[0221] Understandably, if the ratio of the length of the tab connector 23 to the diameter of the housing 1 is less than 0.1, the length of the tab connector 23 is relatively short, which is not conducive to the electrode connector 22 being stacked on the tab connector 23, i.e., it is not conducive to the connection between the tab connector 23 and the electrode connector 22. If the ratio of the length of the tab connector 23 to the diameter of the housing 1 is greater than 0.95, the distance between the tab connector 23 and the inner wall surface of the housing 1 is relatively small, resulting in a shorter distance for the third connecting segment 225 and the second connecting segment 224 to protrude from the tab connector 23, which is not conducive to the bending and forming of the second connecting segment 224. Therefore, this application sets the ratio of the length of the tab connector 23 to the diameter of the housing 1 between 0.1 and 0.95.

[0222] For details, please refer to Figure 5 Along the radial direction of the housing 1, the length of the fixed connection part between the electrode connector 22 and the tab connector 23 is L8, and the length of the tab connector 23 is L1. The ratio of L8 to L1 is between 0.05 and 0.5.

[0223] Understandably, if the ratio of L8 to L1 is less than 0.05, the length of the fixed connection between the electrode connector 22 and the tab connector 23 will be too short, resulting in insufficient connection stability between the electrode connector 22 and the tab connector 23; if the ratio of L8 to L1 is greater than 0.5, it will increase the difficulty of connection. Therefore, this application sets the ratio of L8 to L1 between 0.05 and 0.5.

[0224] In some embodiments, see Figure 5 An encapsulation part 3 is provided at the connection between the third connecting section 225 and the first connecting section 223.

[0225] Understandably, the encapsulation part 3 can prevent the connection between the third connecting segment 225 and the first connecting segment 223 from contacting other substances, thereby preventing corrosion at the connection between the third connecting segment 225 and the first connecting segment 223 and improving the connection stability between the third connecting segment 225 and the first connecting segment 223.

[0226] In some embodiments, an encapsulation portion 3 is provided at the connection between the third connecting segment 225 and the second connecting segment 224.

[0227] Understandably, the encapsulation part 3 can prevent the connection between the third connecting segment 225 and the second connecting segment 224 from contacting other substances, thereby preventing corrosion at the connection between the third connecting segment 225 and the second connecting segment 224 and improving the connection stability of the third connecting segment 225 and the second connecting segment 224.

[0228] In some embodiments, at least a portion of the third connecting segment 225 is provided with an encapsulation portion 3.

[0229] It is understood that by providing the encapsulation part 3 at at least part of the third connecting segment 225, the position of the third connecting segment 225 where the encapsulation part 3 is provided can avoid contact with other substances under the action of the encapsulation part 3, making the position of the third connecting segment 225 where the encapsulation part 3 is provided less prone to corrosion, effectively slowing down the corrosion rate of the entire third connecting segment 225, improving the structural stability of the third connecting segment 225 and the connector 2, and thus improving the stability of the connection between the housing 1 and the electrode tab.

[0230] In some embodiments, see Figure 5 and Figure 7 Along the radial direction of the housing 1, the distance between the end of the tab connector 23 and the inner wall surface of the housing 1 is L10.

[0231] For details, please refer to Figure 5 and Figure 7 The second connecting segment 224 has a first surface 2241 facing the first connecting segment 223. The intersection line between the extended surface of the first surface 2241 and the side wall surface of the housing 1 is the first intersection line. The tab connector 23 has a second surface 2301 facing away from the first connecting segment 223. The intersection line between the extended surface of the second surface 2301 and the side wall surface of the housing 1 is the second intersection line. The vertical distance between the first intersection line and the second intersection line is L11, and L10 ≤ L11. It can be understood that if L10 is greater than L11, the length of the third connecting segment 225 will be too long along the radial direction of the housing 1, which will lead to the length of the connector 2 being too long, which may have a significant impact on the size of the battery. Therefore, this application sets L10 to be less than or equal to L11.

[0232] For details, please refer to Figure 5 and Figure 7 Along the radial direction of the casing 1, the length of the contact portion between the electrode connector 22 and the tab connector 23 is L9, and L10 ≤ L9. It is understandable that if L10 is greater than L9, the length of the contact portion between the electrode connector 22 and the tab connector 23 along the radial direction of the casing 1 will be shorter without affecting the battery size. This would result in a shorter fixed connection portion between the electrode connector 22 and the tab connector 23, which would be detrimental to the connection between them. Therefore, this application sets L10 to be less than or equal to L9.

[0233] In some embodiments, see Figure 9 and Figure 10 The electrode connector 23 includes a first electrode connector 231 and a second electrode connector 232. The first electrode connector 231 is connected to the end of the second electrode connector 232. The second electrode connector 232 is used to connect the electrode. The electrode connector 22 is connected to the side of the first electrode connector 231 away from the second electrode connector 232.

[0234] Along the axial direction of the housing 1, the first electrode tab connector 231 protrudes from the second electrode tab connector 232, and an encapsulation part 3 is provided at the connection between the first electrode tab connector 231 and the electrode connector 22.

[0235] It is understandable that the first tab connector 231 protrudes from the second tab connector 232, and thus a space for accommodating the encapsulation part 3 is formed at the contact position of the first tab connector 231 and the second tab connector 232, which facilitates the setting of the encapsulation part 3.

[0236] By providing an encapsulation part 3 at the connection between the first tab connector 231 and the electrode connector 22, the encapsulation part 3 can prevent the connection between the first tab connector 231 and the electrode connector 22 from contacting other substances, thereby preventing corrosion at the connection position of the first tab connector 231 and the electrode connector 22 and improving the connection stability of the first tab connector 231 and the electrode connector 22.

[0237] In some embodiments, see Figure 9 The first electrode connector 231 and the housing 1 are spaced apart to avoid direct contact between the first electrode connector 231 and the housing 1, and at the same time, it is convenient to set the encapsulation part 3 between the first electrode connector 231 and the housing 1.

[0238] It can be understood that an encapsulation space 233 is formed between the first tab connector 231 and the inner wall surface of the housing 1, and the encapsulation space 233 is used to accommodate the encapsulation part 3.

[0239] It is understandable that by forming an encapsulation space 233 between the first tab connector 231 and the inner wall surface of the housing 1, the encapsulation part 3 is facilitated and can be better positioned at the connection between the first tab connector 231 and the housing 1.

[0240] Specifically, the intersection line between the extended surface of the second tab connector 232 facing away from the electrode connector 22 and the side wall of the housing 1 is the third intersection line 2321, and the intersection line between the end face of the electrode connector 22 facing the second tab connector 232 and the side wall of the housing 1 is the fourth intersection line 2201. The vertical distance between the third intersection line 2321 and the fourth intersection line 2201 is greater than 0.12mm, thereby ensuring that the space between the third intersection line 2321 and the fourth intersection line 2201 can accommodate a sufficient encapsulation part 3.

[0241] In this embodiment, the height H of the encapsulation space 233 along the axial direction of the housing 1 is greater than 0.12 mm. If the height H of the encapsulation space 233 is not greater than 0.12 mm, the height of the encapsulation space 233 will be too low, making it difficult to accommodate the encapsulation part 3. Therefore, this application sets the height of the encapsulation space 233 to be greater than 0.12 mm, so that the encapsulation space 233 can accommodate a sufficient number of encapsulation parts 3, ensuring that the encapsulation part 3 can effectively encapsulate and separate the connection between the first electrode tab connector 231 and the housing 1, thus improving the corrosion resistance at the connection between the first electrode tab connector 231 and the housing 1. It also prevents the encapsulation part 3 from protruding and affecting the connection between the electrode tab connector 23 and the electrode tab when the bottom of the electrode connector 22 is flush with the bottom of the electrode tab connector 23.

[0242] In some embodiments, along the axial direction of the housing 1, the height of the electrode connector 22 is less than the height of the first electrode tab connector 231, wherein...

[0243] An encapsulation space 233 is formed between the first end of the first tab connector 231 and the first end of the electrode connector 22, the encapsulation space 233 being used to accommodate the encapsulation portion 3; and / or

[0244] An encapsulation space is formed between the second end of the first tab connector 231 and the second end of the electrode connector 22, and the encapsulation space 233 is used to accommodate the encapsulation part 3.

[0245] It is understood that the electrode connector 22 is connected to the side of the first tab connector 231 away from the second connecting block, and the height of the electrode connector 22 is less than the height of the first tab connector 231, so that a space for accommodating the encapsulation part 3 is formed between the ends of the electrode connector 22 and the first tab connector 231, so that the encapsulation part 3 can be provided at the connection between the electrode connector 22 and the first tab connector 231.

[0246] Specifically, an encapsulation space is formed between the first end of the first tab connector 231 and the first end of the electrode connector 22, so that an encapsulation portion 3 can be provided at the connection between the first end of the first tab connector 231 and the first end of the electrode connector 22.

[0247] Specifically, an encapsulation space is formed between the second end of the first tab connector 231 and the second end of the electrode connector 22, so that an encapsulation portion 3 can be provided at the connection between the second end of the first tab connector 231 and the second end of the electrode connector 22.

[0248] In some embodiments, see Figure 9 Along the radial direction of the housing 1, the orthographic projection of the first electrode connector 231 onto the side wall of the housing 1 at least partially coincides with the orthographic projection of the electrode connector 22 onto the side wall of the housing 1.

[0249] It is understandable that when the orthographic projection of the first tab connector 231 on the side wall of the housing 1 coincides with the orthographic projection of the electrode connector 22 on the side wall of the housing 1, it means that the first tab connector 231 protrudes from the electrode connector 22, or the electrode connector 22 protrudes from the first tab connector 231. This means that a space is formed at the connection between the first tab connector 231 and the electrode connector 22 that can accommodate the encapsulation part 3, thereby facilitating the setting of the encapsulation part 3 at the connection between the electrode connector 22 and the first tab connector 231.

[0250] In some embodiments, see Figure 11 Along the radial direction of the housing 1, the orthographic projection of the electrode connector 22 onto the side wall of the housing 1 is located within the orthographic projection of the first electrode connector 231 onto the side wall of the housing 1.

[0251] It is understood that along the axial direction of the housing 1, there is a certain distance between the end of the electrode connector 22 and the end of the first tab connector 231, that is, a space for accommodating the encapsulation part 3 will be formed between the end of the electrode connector 22 and the end of the first tab connector 231, so that the encapsulation part 3 can be provided at the connection between the electrode connector 22 and the first tab connector 231.

[0252] In some embodiments, see Figure 12 and Figure 13 The first electrode connector 231 has a receiving groove 234 formed on the side of the housing 1 near the side wall. Part of the electrode connector 22 is located in the receiving groove 234, and another part of the electrode connector 22 protrudes out of the receiving groove 234 and is connected to the housing 1.

[0253] Understandably, the receiving groove 234 can limit the electrode connector 22, improving the connection stability between the electrode connector 22 and the first electrode tab connector 231. Furthermore, since at least a portion of the electrode connector 22 protrudes from the receiving groove 234, it facilitates the connection between the electrode connector 22 and the housing 1.

[0254] In some embodiments, a gap is provided between the electrode connector 22 and the side wall of the receiving groove 234, and the encapsulation portion 3 between the electrode connector 22 and the first tab connector 231 is at least partially disposed within the gap.

[0255] It is understandable that by placing at least a portion of the encapsulation part 3 at the gap, the encapsulation part 3 can prevent other substances from appearing at the gap, thereby preventing the connection between the electrode connector 22 and the first tab connector 231 from contacting other substances, making the connection between the electrode connector 22 and the first tab connector 231 less prone to corrosion.

[0256] In some embodiments, see Figure 12An encapsulation portion 3 is provided between the sidewall surfaces of the electrode connector 22 and the tab connector 23 facing the sidewall of the housing 1.

[0257] It is understood that the electrode connector 22 is disposed in the receiving groove 234 of the first electrode tab connector 231. By providing an encapsulation part between the side wall surfaces of the electrode connector 22 and the electrode tab connector 23 facing the side wall of the housing 1, the encapsulation part 3 can seal the opening of the receiving groove 234, thereby encapsulating and isolating the position between the electrode connector 22 and the opening of the receiving groove 234. This prevents the contact position between the electrode connector 22 and the opening of the receiving groove 234 from contacting other substances, and prevents other substances from entering the receiving groove 234. This effectively prevents corrosion at the connection between the electrode connector 22 and the first electrode tab connector 231.

[0258] In some embodiments, the thickness of the electrode connector 22 is less than the thickness of the first tab connector 231.

[0259] It is understandable that if the thickness of the electrode connector 22 is greater than the thickness of the first tab connector 231, the total thickness of the electrode connector 22 and the first tab connector 231 along the radial direction of the housing 1 will be too large, which will affect the battery. Therefore, this application sets the thickness of the electrode connector 22 to be less than the thickness of the first tab connector 231.

[0260] In some embodiments, the first tab connector 231 has an encapsulation portion 3 on the side near the center of the housing 1.

[0261] It is understood that an encapsulation part 3 is provided on the side of the first tab connector 231 near the center of the housing 1, that is, the encapsulation part 3 and the receiving groove 234 are respectively located on opposite sides of the first tab connector 231. During the battery manufacturing process, the inward shrinkage of the housing 1 will cause the first tab connector 231 to bend towards the center of the housing 1, so that the encapsulation part 3 can be located at the bend of the first tab connector 231, thereby encapsulating and protecting the bend of the first tab connector 231, preventing the bend of the first tab connector 231 from contacting other substances, and preventing corrosion at the bend of the first tab connector 231.

[0262] In some embodiments, the contact area between the tab connector 23 and the tab is S1, the welding area between the tab connector 23 and the tab is s1, and the metal unit area current-carrying capacity at the contact position between the tab connector 23 and the tab is I1; the contact area between the tab connector 23 and the electrode connector 22 is S2, the welding area between the tab connector 23 and the electrode connector 22 is s2, and the metal unit area current-carrying capacity at the contact position between the tab connector 23 and the electrode connector 22 is I2; the contact area between the electrode connector 22 and the housing 1 is S3, the welding area between the electrode connector 22 and the housing 1 is s3, and the metal current-carrying capacity at the contact position between the electrode connector 22 and the housing 1 is I3; the current-carrying requirement of the battery is a.

[0263] Specifically, S1≥a / I1, S2≥a / I2, S3≥a / I3, in order to effectively control the heating rate of the battery and avoid the battery temperature from becoming too high.

[0264] Specifically, s1 / S1 = 10%-90%, s2 / S2 = 10%-90%, and s3 / S3 = 10%-90% are used to effectively control the rate of battery heating and prevent the battery temperature from becoming too high.

[0265] It is understandable that the unit of current capacity is A (ampere), and the unit of current requirement is A / mm. 2 The unit for contact area is mm. 2 .

[0266] In some embodiments, see Figure 14 The connector 2 includes multiple tab connectors 23, each tab connector 23 being an arc-shaped block. The multiple tab connectors 23 are coaxial, and the sum of the lengths of the two sides and the outer wall of the tab connector 23 is R1. The height of the contact part between the electrode connector 22 and the housing 1 is H1, where R1×H1≥a / I2, so as to effectively control the heating rate of the connector 2 and improve the safety and stability of the battery.

[0267] In some embodiments, see Figure 14 and Figure 15 The battery also includes a mounting bracket 4, which is fixed inside the housing 1. The connector 2 is mounted on the mounting bracket 4, and the mounting bracket 4 is used to support the connector 2.

[0268] It is understandable that by installing the connector 2 on the mounting bracket 4 and using the mounting bracket 4 to support and fix the connector 2, the stability of the connector 2 is improved, as is the stability of the connector 2 connecting the housing 1 and the electrode tab.

[0269] In some examples, the mounting bracket 4 is fixedly connected to the housing 1, or fixed to the current collector plate of the battery inside the housing 1.

[0270] In some embodiments, see Figure 14 and Figure 15 The connector 2 includes an electrode connector 22 connected to the housing 1 and an electrode tab connector 23 connected to the electrode tab. The mounting bracket 4 forms a limiting part 41. The electrode tab connector 23 is fixedly connected to one side of the mounting bracket 4, and the electrode connector 22 is disposed on the limiting part 41.

[0271] It is understandable that by placing the electrode connector 22 on the limiting part 41, the limiting part 41 can limit the electrode connector 22, improve the installation stability of the electrode connector 22, and enable the electrode connector 22 and the tab connector 23 to maintain a stable connection.

[0272] For example, the tab connector 23 is fixedly connected to the lower surface of the mounting bracket 4.

[0273] In some embodiments, see Figure 14 and Figure 15 The limiting part 41 includes a limiting groove 411, which has a connecting hole. The electrode connector 22 includes a first end and a second end that are disposed opposite to each other. The first end of the electrode connector 22 passes through the connecting hole and is connected to the tab connector 23. The second end of the electrode connector 22 passes through the opening of the limiting groove 411 and is connected to the housing 1.

[0274] Understandably, the electrode connector 22 passes through the connection hole of the limiting groove 411 and connects with the tab connector 23, which improves the ease of connection between the electrode connector 22 and the tab connector 23. The electrode connector 22 can also pass through the slot to connect with the housing 1, which is simple and convenient.

[0275] In some embodiments, see Figure 1 and Figure 16 The limiting groove 411 is filled with the encapsulation part 3.

[0276] It is understandable that by using the limiting groove 411 to accommodate the encapsulation part 3, the limiting groove 411 can limit the encapsulation part 3, so that the encapsulation part 3 can be stably placed in the limiting groove 411, which is beneficial to the setting and forming of the encapsulation part 3.

[0277] The walls of the tab connector 23, the electrode connector 22, and the limiting groove 411 can be arranged to form a space for accommodating the encapsulation part 3. The encapsulation part 3 is provided in the limiting groove 411. The encapsulation part 3 can encapsulate and isolate the connection between the electrode connector 22 and the tab connector 23. At the same time, the limiting groove 411 limits the encapsulation part 3, so that the encapsulation part 3 can better encapsulate and isolate the connection between the electrode connector 22 and the tab connector 23.

[0278] In some embodiments, see Figure 17The battery also includes an electrode assembly, and the housing 1 has a mounting cavity 11 in which the electrode assembly is mounted.

[0279] Specifically, the housing 1 has an inwardly recessed portion 12 that protrudes into the mounting cavity 11. The connector 2 is located between the inwardly recessed portion 12 and the electrode assembly. The connector 2 connects the inwardly recessed portion 12 and the positive electrode tab of the electrode assembly, so that the connector 2 can connect the positive electrode tab of the battery and the housing 1 together.

[0280] Specifically, connector 2 is located between the electrode assembly and the inner bottom wall of the housing 1. Connector 2 connects the negative electrode tab of the electrode assembly and the inner bottom wall of the housing 1, so that connector 2 can connect the negative electrode tab of the battery and the housing 1 together.

[0281] In some examples, the housing 1 has a structure with one end open and the other end closed. A terminal hole is provided at the bottom of the housing 1 opposite to the opening, and a terminal is inserted into the terminal hole and is insulated and sealed to the housing 1 by an insulating component.

[0282] In some examples, the housing 1 is a steel housing, and the housing 1 is plated with a nickel layer at least at the position where it contacts the electrode connector 22. The electrode tab connector 23 is copper, the electrode tab connected to the electrode tab connector 23 is copper, and the electrode connector 22 is nickel.

[0283] In some examples, the inner wall of the housing 1 is coated with nickel, and the outer wall of the housing 1 may also be coated with a nickel layer.

[0284] In some embodiments, the tab connector 23 is spaced apart from the recessed portion 12.

[0285] It is understandable that the tab connector 23 is spaced apart from the inner recess 12, and the tab connector 23 will not directly contact the inner recess 12, which reduces the connection points between the connector 2 and the housing 1 and avoids corrosion and other problems caused by contact between the tab connector 23 and the inner recess 12.

[0286] In some embodiments, see Figure 18 The connector 2 includes a tab connector 23 connected to the tab. The tab connector 23 has a clearance space 235 on the side facing the recessed portion 12. The clearance space 235 is used to accommodate the recessed portion 12 so that the recessed portion 12 and the tab connector 23 are spaced apart.

[0287] It is understandable that by forming a clearance space 235 on the side of the tab connector 23 facing the recessed portion 12, the clearance space 235 can be used to accommodate the recessed portion 12 when the battery is formed, that is, when the recessed portion 12 protrudes into the mounting cavity 11, so that the recessed portion 12 and the tab connector 23 are spaced apart, thus avoiding contact between the recessed portion 12 and the tab connector 23.

[0288] In some examples, clearance space 235 may be adjacent to tab connector 23, or clearance space 235 may be formed by tab connector 23.

[0289] In some embodiments, see Figure 1 The tab connector 23 has a relief groove 236 on the side facing the inward portion 12. The relief groove 236 is used to accommodate the inward portion 12 so that the inward portion 12 and the tab connector 23 are spaced apart.

[0290] It is understandable that during battery molding, when the inner portion 12 protrudes into the mounting cavity 11, the relief groove 236 can be used to accommodate the inner portion 12, so that the inner portion 12 and the tab connector 23 are spaced apart, thus avoiding contact between the inner portion 12 and the tab connector 23.

[0291] In some embodiments, the battery further includes a cover plate, and the connector 2 is electrically connected to the cover plate.

[0292] It is understandable that the connector 2 is electrically connected to the cover plate, which makes the cover plate live and can prevent the cover plate from being corroded.

[0293] In some examples, a cover plate is placed over the opening of the housing 1, and a seal is provided at the connection between the cover plate and the housing 1 to improve the sealing performance of the connection between the cover plate and the housing 1.

[0294] In some cases, the cover plate and housing 1 are insulated from each other.

[0295] In some embodiments, the encapsulation part 3 is an encapsulating adhesive or a thermoplastic film. It should be noted that this is merely an example of the types of encapsulation parts 3 and is not intended to be particularly limited; the encapsulation part 3 can also be any other suitable material.

[0296] In some embodiments, the encapsulation part 3 has an irregular shape.

[0297] It is understandable that, when setting up the encapsulation part 3, in order to facilitate the setting of the encapsulation part 3, the fluid-like encapsulation part 3 can be injected into the designated position, and after the encapsulation part 3 cools down, it can be shaped and fixed. Therefore, the shape of the encapsulation part 3 can be irregular.

[0298] In some embodiments, the thickness of the encapsulation portion 3 is uniform along the axial direction or radial direction of the battery, ensuring the uniformity of the encapsulation protection effect of the encapsulation portion 3.

[0299] In some embodiments, the thickness of the encapsulation portion 3 is uneven along the axial or radial direction of the battery. More encapsulation portions 3 can be provided at locations requiring special protection, such as joints or bends in different structures. That is, the thickness of the encapsulation portion 3 at these locations can be greater than at other locations, thus improving the protection effect at these key locations.

[0300] In some embodiments, the thickness of the encapsulation portion 3 is between 1 mm and 2 mm along the axial direction or radial direction of the battery.

[0301] It is understandable that when the thickness of the encapsulation part 3 is less than 1 mm, the protective effect of the encapsulation part 3 may be insufficient; when the thickness of the encapsulation part 3 is greater than 2 mm, it may have a significant impact on the overall thickness of the connector 2 and make it difficult to bend and shape the connector 2. Therefore, this application sets the thickness of the encapsulation part 3 between 1 mm and 2 mm, so that the encapsulation part 3 can provide sufficient protection without significantly affecting the overall thickness of the connector 2, and also ensures that the connector 2 can be bent and shaped smoothly.

[0302] In some embodiments, see ​ The encapsulation part 3 includes an encapsulation layer 31 and an insulating protective layer 32.

[0303] Specifically, the encapsulation layer 31 is disposed at the connection between the electrode lead-out portion 201 and the tab connection portion 202, and the encapsulation layer 31 is located on the side of the encapsulation layer 31 opposite to the connection between the electrode lead-out portion 201 and the tab connection portion 202.

[0304] Understandably, the encapsulation layer 31 provides encapsulation and protection for the connection between the electrode lead-out portion 201 and the tab connection portion 202, preventing impurities from entering the connection. The insulating protective layer 32, on the other hand, protects the encapsulation layer 31 from the influence of other substances, ensuring that the encapsulation layer 31 continuously provides encapsulation and protection for the connection between the electrode lead-out portion 201 and the tab connection portion 202.

[0305] Specifically, the encapsulation layer 31 is disposed at the connection between the electrode lead-out portion 201 and the electrode of the battery, and the insulating protective layer 32 is connected to the side of the encapsulation layer 31 away from the connection between the electrode lead-out portion 201 and the electrode.

[0306] Understandably, the encapsulation layer 31 provides encapsulation and protection for the connection between the electrode lead 201 and the electrode, preventing impurities from entering the connection. The insulating protective layer 32, on the other hand, protects the encapsulation layer 31 from the influence of other substances, ensuring that the encapsulation layer 31 continuously provides encapsulation and protection for the connection between the electrode lead 201 and the electrode.

[0307] In some embodiments, the encapsulation portion 3 protrudes from the connection between the electrode lead-out portion 201 and the tab connection portion 202, so that the encapsulation portion 3 can better encapsulate and protect the connection between the electrode lead-out portion 201 and the tab connection portion 202, and prevent impurities from entering the connection between the electrode lead-out portion 201 and the tab connection portion 202.

[0308] Specifically, along the axial direction of the housing, the length of the encapsulation part 3 protruding from the connection point between the electrode lead-out part 201 and the tab connection part 202 is between 0 mm and 4 mm.

[0309] It is understandable that if the length of the protruding portion of the encapsulation part 3 is less than 0 mm, the protection effect of the encapsulation part 3 at the connection between the electrode lead-out portion 201 and the tab connection portion 202 is poor; if the length of the protruding portion of the encapsulation part 3 is greater than 4 mm, the encapsulation part 3 may easily affect the sealing of the battery casing. Therefore, this application sets the length of the protruding portion of the encapsulation part 3 between 0 mm and 4 mm.

[0310] In some embodiments, the encapsulation portion 3 protrudes from the connection point between the electrode lead-out portion 201 and the battery electrode, so that the encapsulation portion 3 can better encapsulate and protect the connection point between the electrode lead-out portion 201 and the battery electrode, preventing impurities from entering the connection point between the electrode lead-out portion 201 and the battery electrode.

[0311] Specifically, along the axial direction of the housing, the length of the encapsulation part 3 protruding from the connection point between the electrode lead-out part 201 and the battery electrode is between 0 mm and 4 mm.

[0312] It is understandable that if the length of the protruding portion of the encapsulation part 3 is less than 0 mm, the protection effect of the encapsulation part 3 at the connection between the electrode lead 201 and the battery electrode is poor; if the length of the protruding portion of the encapsulation part 3 is greater than 4 mm, the encapsulation part 3 may easily affect the sealing of the battery casing. Therefore, this application sets the length of the protruding portion of the encapsulation part 3 between 0 mm and 4 mm.

[0313] In some embodiments, the connector 2 has a symmetrical structure.

[0314] It should be noted that the symmetrical structure of connector 2 means that most of the structure of connector 2 is symmetrical, but does not mean that connector 2 is completely symmetrical in structure.

[0315] In some examples, connector 2 can be a centrally symmetric structure.

[0316] In some embodiments, the battery includes:

[0317] The shell has an inwardly recessed portion that protrudes into the shell.

[0318] A connector, comprising an electrode connector and a tab connector connected in sequence, wherein the electrode connector connects the recessed portion and the tab connector, and the tab connector is adapted to be connected to a battery tab.

[0319] The encapsulation part is provided at least at a portion of the connectors;

[0320] The electrode assembly has a housing with a mounting cavity, and the electrode assembly is installed in the mounting cavity.

[0321] The first end of the electrode connector is connected to the tab connector, and the second end of the electrode connector is connected to the recessed part and is spaced apart from the tab connector.

[0322] The connector is located on one side of the recessed portion, wherein,

[0323] At least a portion of the electrode connector is connected to the side of the recess facing the electrode assembly; and / or,

[0324] At least some of the electrode connectors are connected to the side of the recess that faces away from the electrode assembly.

[0325] The connection positions of the electrode connector and the tab connector, and the connection positions of the electrode connector and the housing, are located on different sides of the electrode connector.

[0326] An encapsulation part is provided at the connection between the electrode connector and the inner recess.

[0327] The housing includes a housing body and an inner recess, the inner recess being connected to the housing body;

[0328] Along the radial direction of the housing, at least a portion of the electrode connector protrudes from the tab connector and is connected to the housing body.

[0329] The recessed part forms an angle with the housing body on the side facing the electrode assembly, with the angle ranging from 0 to 150 degrees.

[0330] The minimum distance between the tab connector and the recessed part is greater than 0.05mm.

[0331] The electrode connector includes a first connecting segment and a second connecting segment connected in sequence. The first connecting segment is connected to the tab connector, and the second connecting segment is connected to the inner portion.

[0332] An encapsulation portion is provided between the first connecting section and the electrode connector, and the encapsulation portion extends along the side of the first connecting section away from the electrode connector.

[0333] The first end of the first connecting segment is stacked on the tab connector, and the second end of the first connecting segment protrudes or bends away from the tab connector relative to the first end of the first connecting segment.

[0334] An encapsulation part is provided between the second end of the first connecting section and the electrode connector.

[0335] The second end of the first connecting segment is connected to the housing. The second end of the first connecting segment, the tab connector, and the housing form a receiving space, which is used to receive the encapsulation part.

[0336] The second connecting section includes a first connecting section and a second connecting section connected in sequence. The first connecting section is connected to the first connecting section, and the second connecting section is connected to the inner part. The first connecting section is connected to the shell body, and the second connecting section is connected to the inner part.

[0337] The electrode connector also includes a third connecting segment, which connects the first connecting segment and the second connecting segment.

[0338] The third connecting section is spaced apart from the housing.

[0339] The first end of the third connecting segment is connected to the first connecting segment, the second end of the third connecting segment bends toward the first connecting segment relative to the first end of the third connecting segment, and an encapsulation part is provided between the second end of the third connecting segment and the first connecting segment.

[0340] The first end of the third connecting segment is connected to the first connecting segment, and the second end of the third connecting segment is connected to the second connecting segment. Along the direction away from the tab connector, the second end of the third connecting segment extends toward the side wall of the housing and abuts against the side wall of the housing.

[0341] An encapsulation part is provided between the first end of the third connecting section and the electrode connector.

[0342] The electrode connector includes a first electrode connector and a second electrode connector. The first electrode connector is connected to the end of the second electrode connector. The second electrode connector is used to connect the electrode. The electrode connector is connected to the side of the first electrode connector opposite to the second electrode connector.

[0343] The first tab connector, the electrode connector, and the housing form a receiving space, which is used to accommodate the encapsulation part.

[0344] The first end of the first electrode connector is connected to the second electrode connector, and the second end of the first electrode connector extends in the direction toward the inward portion to protrude from the first electrode connector.

[0345] An encapsulation portion is provided between the second end of the first electrode connector and the electrode connector.

[0346] The first electrode connector has a receiving groove, with part of the electrode connector located in the receiving groove and the other part of the electrode connector protruding from the receiving groove and connected to the housing.

[0347] The first electrode connector has a bent structure.

[0348] The first electrode connector has a sealing part at the bend.

[0349] The first end of the first electrode connector is connected to the second electrode connector, wherein...

[0350] An encapsulation portion is provided between the second end of the first electrode connector and the recessed portion; and / or,

[0351] The first end of the first tab connector, the electrode connector and the housing form a receiving space, which is used to accommodate the encapsulation part.

[0352] In some embodiments, the connector includes:

[0353] Electrode connectors, suitable for connection to the housing;

[0354] A tab connector is attached to an electrode connector and is used to connect the electrode connector and the tab.

[0355] Packaging department;

[0356] The electrode connector and the tab connector are provided with a sealing part at the connection; or, at least one of the electrode connector and the tab connector is provided with a sealing part.

[0357] The electrode connector is welded to the tab connector, and an encapsulation part is provided at the welded part of the electrode connector and the tab connector.

[0358] At least a portion of the package is provided around the welding area between the electrode connector and the tab connector.

[0359] The electrode connector is welded to the housing, and an encapsulation part is provided at the welded part between the electrode connector and the housing.

[0360] At least a portion of the encapsulation is provided around the welding area between the electrode connector and the housing.

[0361] The electrode connector has a bent structure, and the bent part of the electrode connector is provided with a sealing part.

[0362] The electrode connector includes a first connecting segment and a second connecting segment. The second connecting segment connects the first connecting segment and the housing. The first connecting segment connects to the electrode tab connector.

[0363] At least a portion of the package covers the connection between the first connecting section and the tab connector; and / or,

[0364] At least a portion of the package covers the connection between the first and second connecting segments; and / or,

[0365] At least part of the encapsulation covers the connection between the second connecting section and the housing.

[0366] The electrode connector also includes a third connecting segment, which connects the first connecting segment and the second connecting segment, wherein,

[0367] At least part of the package covers the connection between the third connecting segment and the first connecting segment; and / or,

[0368] At least part of the package covers the connection between the third connecting segment and the second connecting segment; and / or,

[0369] The third connecting section has a bent structure, and at least part of the encapsulation part is located at the bend of the third connecting section.

[0370] The tab connector has a bent structure, and the bent part of the tab connector is provided with a sealing part.

[0371] The electrode connector includes a first electrode connector and a second electrode connector. The first electrode connector connects the second electrode connector and the electrode connector. The second electrode connector is used to connect the electrode tabs.

[0372] At least part of the encapsulation portion covers the connection between the first tab connector and the second tab connector;

[0373] At least part of the package covers the connection between the first tab connector and the electrode connector;

[0374] At least part of the package covers the connection between the second tab connector and the tab.

[0375] In some embodiments, the connector includes:

[0376] Electrode connectors, suitable for connection to the inner bottom wall of the battery casing;

[0377] The electrode connector is suitable for connection to the negative electrode of the battery, wherein,

[0378] The electrode connector is stacked on one side of the tab connector; or,

[0379] The electrode connector includes a first side and a second side disposed opposite to each other. The first side is connected to the housing, and the electrode tab connector is connected to the second side.

[0380] The electrode connector has a first connecting surface, and the tab connector has a second connecting surface. The first connecting surface and the second connecting surface are connected, wherein...

[0381] At least one of the first connecting surface and the second connecting surface is provided with multiple grooves to increase the contact area between the first connecting surface and the second connecting surface;

[0382] At least one of the first connecting surface and the second connecting surface is a rough surface;

[0383] At least one of the first connecting surface and the second connecting surface is provided with an embossed structure.

[0384] The electrode connector and the tab connector are integrally formed; or,

[0385] The electrode connector is connected to the tab connector by at least one of electroplating, electroless plating, and spraying; or,

[0386] The electrode connector is connected to the tab connector by at least one of the following methods: welding, cold heading, hot bonding, jointing, riveting, and heat shrinking.

[0387] The electrode connector includes a first connecting segment and a second connecting segment connected in sequence, wherein,

[0388] The first connecting segment and the second connecting segment are integrally formed; or,

[0389] The first connecting section is connected to the second connecting section by at least one of the following methods: snap-fit, threaded connection, and interference fit.

[0390] The electrode connector includes a first electrode connector and a second electrode connector, wherein,

[0391] The first electrode connector and the second electrode connector are integrally formed; or...

[0392] The first electrode connector is connected to the second electrode connector by at least one of the following methods: snap-fit, threaded connection, and interference fit.

[0393] The electrode connector and the tab connector are made of the same material, and the electrode connector is fixedly connected to the tab connector by welding.

[0394] The electrode connector and the tab connector are made of different materials. The electrode connector is connected to the tab connector by at least one of the following methods: snap-fit, threaded connection, and interference fit.

[0395] The connection structure also includes an encapsulation part, with at least some electrode connectors having an encapsulation part and / or at least some tab connectors having an encapsulation part.

[0396] The electrode connector is made of the same material as the housing, and the electrode connector is fixedly connected to the tab connector by welding.

[0397] The electrode connector and the housing are made of different materials. The electrode connector is prevented from connecting to the housing by at least one of the following: snap-fit, threaded connection and interference fit.

[0398] The electrode connector is integrally formed with the housing.

[0399] In some embodiments, the connector includes an electrode connector adapted to connect to the battery housing;

[0400] The electrode connector includes at least two connecting segments connected in sequence, and there is a receiving cavity between at least two connecting segments.

[0401] The housing connection structure also includes a tab connector, which is connected to the electrode connector and is adapted to connect with the battery's tabs.

[0402] At least two connecting segments include a first connecting segment and a second connecting segment, the second connecting segment connecting the first connecting segment and the housing, and a receiving cavity is formed between the second connecting segment and the first connecting segment.

[0403] The extension direction of the first connecting segment is different from that of the second connecting segment.

[0404] The first end of the second connecting segment is connected to the first connecting segment, and the second end of the second connecting segment is bent toward the first connecting segment relative to the first end of the second connecting segment. The second end of the second connecting segment and the first connecting segment are spaced apart.

[0405] The first connecting segment is stacked on the electrode connector, and the first end of the first connecting segment is connected to the second connecting segment. Along the radial direction of the housing, the first end of the first connecting segment protrudes from the electrode connector.

[0406] At least two connecting segments also include a third connecting segment, which connects the first connecting segment and the second connecting segment so that the first connecting segment and the second connecting segment are spaced apart.

[0407] The third connecting segment is either a straight segment or a bent structure.

[0408] The third connecting segment is tilted relative to the first connecting segment and / or the second connecting segment.

[0409] The first end of the second connecting segment is connected to the third connecting segment, and the second end of the second connecting segment protrudes from the first connecting segment along the radial direction of the housing.

[0410] An insulating separator is provided between the third connecting section and the first connecting section.

[0411] The first connecting segment is connected to the tab connector. Along the direction away from the tab connector, the end of the third connecting segment opposite to the first connecting segment extends toward the side wall of the housing and abuts against the side wall of the housing.

[0412] In some embodiments, the connector includes:

[0413] The tab connector is suitable for being located on one side of the recessed portion of the battery casing. The tab connector has a clearance space on the side facing the recessed portion, which is used to accommodate the recessed portion so that the recessed portion and the tab connector are spaced apart.

[0414] The clearance space includes a clearance groove formed in the tab connector, which is used to accommodate the recessed portion.

[0415] The recessed part and the wall of the clearance groove are spaced apart.

[0416] The tab connection structure includes an insulating sheet disposed on the wall of the clearance groove to insulatingly separate the recessed part from the wall of the clearance groove.

[0417] Along the direction from the side wall of the shell to the center of the shell, the depth of the clearance groove gradually increases.

[0418] The tab connection structure also includes a partition, which is connected to the side of the tab connector facing the inward portion. The partition is used to separate the inward portion and the tab connector.

[0419] The first end of the partition is fixedly connected to the tab connector, and the other end of the partition is connected to the inner part by snap-fit ​​or welding.

[0420] The tab connection structure also includes an insulating element, which is connected to the side of the tab connector facing the inward portion.

[0421] The electrode connection structure also includes an electrode connector, which is connected to the electrode connector. The electrode connector is used to connect to the housing, and the electrode connector is used to connect to the electrode.

[0422] Along the radial length of the shell, the length of the clearance space is greater than or equal to the length of the recess.

[0423] The electrode assembly is located between the recessed section and the inner bottom wall of the housing, wherein,

[0424] The tab connection structure is located between the recessed portion and the electrode assembly; or,

[0425] The tab connection structure is located on the side of the recessed portion away from the electrode assembly.

[0426] In some embodiments, the connector includes:

[0427] Electrode connectors, suitable for connection to the battery casing;

[0428] A tab connector, which connects to an electrode connector, is adapted to connect to the tabs of a battery;

[0429] One of the tab connector and the electrode connector has a receiving groove, and the other of the tab connector and the electrode connector is at least partially inserted into the receiving groove.

[0430] According to the connection structure of the embodiment of this application, the receiving groove can play a limiting role, so that one of the tab connector and the electrode connector can limit the other of the tab connector and the electrode connector, thereby improving the connection stability of the tab connector and the electrode connector, and thus improving the structural stability of the connection structure itself.

[0431] In some embodiments, the other of the tab connector and the electrode connector has a body that is inserted into a receiving groove.

[0432] It is understandable that one of the tab connectors and the electrode connectors has a receiving groove, and the body of the other tab connector and the electrode connector is inserted into the receiving groove, so that at least part of the other tab connector and the electrode connector is located in the receiving groove, thereby reducing the overall size of the connection structure and facilitating the miniaturization of the connection structure.

[0433] In some embodiments, another part of the tab connector and the electrode connector is formed with a protrusion that engages with a receiving groove.

[0434] It is understandable that one of the tab connectors and the electrode connectors has a receiving groove, and the protrusion of the other tab connector and the electrode connector is engaged with the receiving groove. That is, the other tab connector and the electrode connector are not inserted into the receiving groove as a whole, but only the protrusion is inserted into the receiving groove. This improves the connection stability of the electrode connector and the tab connector, and also reduces the connection area between the electrode connector and the tab connector.

[0435] The smaller the connection area between the electrode connector and the tab connector, the smaller the encapsulation part that can be provided at the connection point between the electrode connector and the tab connector can be, which facilitates the setting of the encapsulation part and can reduce costs.

[0436] In some embodiments, the receiving groove includes a first receiving groove and a second receiving groove, the electrode tab connector is formed in the first receiving groove, at least a portion of the electrode connector is inserted into the first receiving groove, the electrode connector is formed in the second receiving groove, and at least a portion of the electrode tab connector is inserted into the second receiving groove.

[0437] Understandably, the electrode connector is inserted into the first receiving groove of the electrode tab connector, which serves to limit the electrode connector and improve the connection stability between the electrode connector and the electrode tab connector. Similarly, the electrode tab connector is inserted into the second receiving groove of the electrode connector, which also serves to limit the electrode tab connector and improve the connection stability between the electrode connector and the electrode tab connector. In other words, the electrode connector and the electrode tab connector can mutually limit each other, effectively improving the connection stability and ensuring the structural stability of the connection structure.

[0438] In some embodiments, the electrode connector includes a first connecting segment and a second connecting segment, the second connecting segment connecting the first connecting segment and the housing, and the first connecting segment connecting to the electrode tab connector; wherein

[0439] One of the tab connector and the first connecting segment has a receiving groove, and the other of the tab connector and the first connecting segment is at least partially inserted into the receiving groove.

[0440] Understandably, the receiving groove can serve as a limiting function, allowing one of the tab connectors and the first connecting segment to limit the other of the tab connectors and the first connecting segment, thereby improving the connection stability of the tab connectors and the first connecting segment, and thus improving the structural stability of the connection structure itself.

[0441] In some embodiments, the electrode connector includes a first electrode connector and a second electrode connector, the first electrode connector connecting the second electrode connector and the electrode connector, and the second electrode connector being used to connect the electrode tab;

[0442] One of the first tab connector and the electrode connector has a receiving groove, and the other of the first tab connector and the electrode connector is at least partially inserted into the receiving groove.

[0443] Understandably, the receiving groove can serve as a limiting device, allowing one of the first tab connector and the electrode connector to limit the other of the first tab connector and the electrode connector, thereby improving the connection stability of the first tab connector and the electrode connector, and thus improving the structural stability of the connection structure itself.

[0444] In some embodiments, the connection structure further includes an encapsulation portion.

[0445] Specifically, at least some of the electrode connectors are provided with encapsulation portions. The encapsulation portions prevent contact with other substances (such as electrolytes) at the locations of the encapsulated portions, making these areas less prone to corrosion. This effectively slows down the corrosion rate of the entire electrode connector, improves its structural stability, and consequently enhances the overall structural stability of the connection structure.

[0446] Specifically, at least some of the tab connectors are provided with encapsulation portions. The encapsulation portions prevent contact with other substances (such as electrolytes) at the locations of the encapsulated portions, making these areas less prone to corrosion. This effectively slows down the corrosion rate of the entire tab connector, improves its structural stability, and consequently enhances the overall structural stability of the connection structure.

[0447] Specifically, the connection between the tab connector and the electrode connector is provided with an encapsulation part. This encapsulation part prevents the connection between the tab connector and the electrode connector from contacting other substances (such as electrolyte), making the connection less prone to corrosion. This effectively slows down the corrosion rate at the connection and improves the structural stability of the connection structure.

[0448] In some embodiments, the tab connector has a receiving groove, the electrode connector is inserted into the receiving groove, a gap is provided between the electrode connector and the side wall of the receiving groove, and at least a portion of the encapsulation portion is disposed in the gap.

[0449] It is understandable that by placing at least part of the encapsulation portion in the gap, the encapsulation portion can prevent other substances from appearing in the gap, thereby preventing the connection between the electrode connector and the tab connector from contacting other substances, making the connection between the electrode connector and the tab connector less prone to corrosion.

[0450] Specifically, the depth of the receiving groove is less than the thickness of the electrode connector.

[0451] Understandably, the tab connector has a receiving groove, into which the electrode connector is inserted. The depth of the receiving groove is less than the thickness of the electrode connector, allowing at least a portion of the electrode connector to protrude from the receiving groove, facilitating the connection between the electrode connector and the housing.

[0452] In some embodiments, the electrode connector has a receiving groove, the tab connector is inserted into the receiving groove, a gap is formed between the tab connector and the side wall of the receiving groove, and at least a portion of the encapsulation portion is disposed in the gap.

[0453] It is understandable that by placing at least part of the encapsulation portion in the gap, the encapsulation portion can prevent other substances from appearing in the gap, thereby preventing the connection between the electrode connector and the tab connector from contacting other substances, making the connection between the electrode connector and the tab connector less prone to corrosion.

[0454] Specifically, the depth of the receiving groove is less than the thickness of the tab connector.

[0455] Understandably, the electrode connector has a receiving groove, and the tab connector is inserted into the receiving groove. The depth of the receiving groove is less than the thickness of the tab connector, so that at least part of the tab connector can protrude from the receiving groove, facilitating the connection between the tab connector and the tab.

[0456] In some embodiments, a sealing portion is provided at the opening of the receiving groove.

[0457] Understandably, when the electrode connector is placed in the receiving groove of the tab connector, by setting a sealing part at the opening of the receiving groove, and the sealing part being connected to the electrode connector, the sealing part can seal and isolate the position between the electrode connector and the opening of the receiving groove, so that the contact position between the electrode connector and the opening of the receiving groove will not come into contact with other substances, and other substances will not enter the receiving groove, thereby effectively preventing corrosion at the connection between the electrode connector and the tab connector.

[0458] When the tab connector is placed in the receiving groove of the electrode connector, by setting a sealing part at the opening of the receiving groove, the sealing part is connected to the tab connector. The sealing part can seal and isolate the position between the tab connector and the opening of the receiving groove, so that the contact position between the tab connector and the opening of the receiving groove will not come into contact with other substances, and other substances will not enter the receiving groove, thereby effectively preventing corrosion at the connection between the electrode connector and the tab connector.

[0459] In some embodiments, the connector includes:

[0460] Electrode connectors, suitable for connection to the inner bottom wall of the battery casing;

[0461] A tab connector, which connects to an electrode connector, is suitable for connecting to the negative tab of a battery;

[0462] At least some of the electrode connectors protrude from the tab connectors.

[0463] According to the connection structure of the present application embodiment, when connecting the inner bottom wall of the battery casing and the negative electrode tab using the connection structure, the connection structure is disposed between the inner bottom wall of the casing and the negative electrode tab, and the electrode tab connector can be connected to the negative electrode tab. Since at least part of the electrode connector protrudes from the electrode tab connector, the electrode connector can protrude toward the inner bottom wall of the casing, which facilitates the connection between the electrode connector and the inner bottom wall of the casing and improves the connection convenience between the casing and the electrode tab.

[0464] Understandably, the electrode connector protrudes from the tab connector, allowing the electrode connector to be directly connected to the inner bottom wall of the housing, thus simplifying the connection structure.

[0465] In some embodiments, the electrode connector is provided with a mounting groove, and the electrode connector is inserted into the mounting groove.

[0466] Understandably, the mounting groove can limit the position of the electrode connector, thereby improving the connection stability between the electrode connector and the tab connector.

[0467] In some embodiments, an installation space is formed between the electrode connector and the sidewall of the mounting groove, the installation space being used to install the encapsulation portion.

[0468] It is understandable that by spacing the electrode connector from the sidewall of the mounting groove, an installation space for mounting the encapsulation part can be formed between the electrode connector and the sidewall of the mounting groove. Thus, an encapsulation part is provided at the connection between the electrode connector and the tab connector to improve the corrosion resistance at the connection between the electrode connector and the tab connector.

[0469] In some embodiments, a sealing portion is provided at the opening of the mounting groove.

[0470] Understandably, the electrode connector is located in the mounting groove of the tab connector. By setting an encapsulation part at the opening of the mounting groove, the encapsulation part is connected to the electrode connector. The encapsulation part can encapsulate and isolate the position between the electrode connector and the opening of the mounting groove, so that the contact position between the electrode connector and the opening of the mounting groove will not come into contact with other substances, and other substances will not enter the mounting groove. This can effectively prevent corrosion at the connection between the electrode connector and the tab connector.

[0471] In some embodiments, the electrode connector includes a bottom wall connecting portion, a middle portion, and a fixing portion connected in sequence. The bottom wall connecting portion is adapted to connect with the inner bottom wall of the battery casing, and the fixing portion is fixedly connected with the tab connector.

[0472] It is understandable that the electrode connector, the fixing part, the middle part and the bottom wall connecting part are connected in sequence, so that the electrode connector connects the housing and the electrode connector, realizing the connection between the housing and the electrode.

[0473] In some embodiments, the middle portion is inclined relative to the bottom wall connection portion and / or fixing portion.

[0474] It is understandable that tilting the middle section allows it to connect the bottom wall connection and the fixing part, while reducing the overall height of the electrode connector and thus the height of the entire connection structure, which is beneficial for the miniaturization design of the battery.

[0475] In some embodiments, a sealing portion is provided at the connection between the bottom wall connecting portion and the middle portion.

[0476] Understandably, the encapsulation section can protect the connection between the bottom wall connection and the middle section, preventing the connection between the bottom wall connection and the middle section from contacting other substances (such as electrolyte), effectively preventing corrosion at the connection between the bottom wall connection and the middle section, and improving the connection stability between the bottom wall connection and the middle section.

[0477] In some embodiments, an encapsulation portion is provided at the connection between the middle portion and the fixed portion.

[0478] Understandably, the encapsulation part can protect the connection between the middle part and the fixed part, preventing the connection between the middle part and the fixed part from contacting other substances (such as electrolyte), effectively preventing corrosion at the connection between the middle part and the fixed part, and improving the connection stability between the middle part and the fixed part.

[0479] In some embodiments, the central axis of the electrode connector coincides with the central axis of the connection structure.

[0480] It is understandable that the electrode connector is located in the middle of the connection structure, so that the electrode connector is positioned opposite to the inner bottom wall of the housing, which facilitates the connection between the electrode connector and the inner bottom wall of the housing.

[0481] According to the embodiments of the second aspect of this application, see ​ The battery includes a housing, an electrode assembly, and a connection structure as claimed in any one of claims 1 to 8, wherein the housing has a mounting cavity, the electrode assembly is mounted in the mounting cavity, and the connection structure is located between the electrode assembly and the inner bottom wall of the housing.

[0482] Understandably, when using a connecting structure to connect the inner bottom wall of the battery casing and the negative electrode tab, placing the connecting structure between the electrode assembly and the inner bottom wall of the casing allows the electrode tab connector to connect to the negative electrode tab. Since at least part of the electrode connector protrudes from the electrode tab connector, it can protrude towards the inner bottom wall of the casing, facilitating connection between the electrode connector and the inner bottom wall of the casing and improving the ease of connection between the casing and the electrode tab. Furthermore, the protrusion of the electrode connector allows it to directly connect to the inner bottom wall of the casing, simplifying the connection structure.

[0483] In some embodiments, the tab connector is spaced apart from the side wall of the housing to avoid direct contact between the tab connector and the side wall of the housing, thereby reducing the contact points between the connection structure and the housing and preventing corrosion caused by contact between the tab connector and the housing.

[0484] In some embodiments, an encapsulation portion is provided at the connection between the electrode connector and the inner bottom wall of the housing.

[0485] Understandably, the encapsulation section can protect the connection between the electrode connector and the inner bottom wall of the housing, preventing the connection between the electrode connector and the inner bottom wall of the housing from contacting other substances (such as electrolyte), effectively preventing corrosion at the connection between the electrode connector and the inner bottom wall of the housing, and improving the connection stability between the electrode connector and the inner bottom wall of the housing.

[0486] In some embodiments, the battery includes:

[0487] case;

[0488] Connectors and encapsulation parts; the connectors are used to connect the housing and the electrode tabs.

[0489] A receiving space is formed at the connector or between the connector and the housing, and the receiving space is used to accommodate the encapsulation part.

[0490] According to the battery embodiments of this application, by providing a receiving space at the connector to accommodate the encapsulation portion, the encapsulation portion is easily placed at the connector. This prevents the location of the encapsulation portion on the connector from contacting other substances, making the location less prone to corrosion. This effectively slows down the corrosion rate of the entire connector, improves the structural stability of the connector, and consequently improves the stability of the connection between the housing and the electrode tab. Furthermore, by providing a receiving space at the connection between the connector and the housing to accommodate the encapsulation portion, the encapsulation portion is easily placed at the connection between the connector and the housing. The encapsulation portion prevents the connection between the connector and the housing from contacting other substances, making the connection less prone to corrosion, improving the stability of the connection between the connector and the housing, and consequently improving the stability of the connection between the housing and the electrode tab.

[0491] It is understandable that using a receiving space to accommodate the encapsulation part allows the encapsulation part to be filled into the receiving space, thus facilitating the installation and shaping of the encapsulation part. Furthermore, when the encapsulation part is in a fluid state before shaping, the design of the receiving space can also ensure the amount of encapsulation part installed, avoiding insufficient encapsulation part that would be unable to provide effective corrosion protection.

[0492] In some embodiments, the connector includes an electrode connector connected to the housing and an electrode tab connector connected to the tab.

[0493] Understandably, the electrode connector is connected to the housing, while the tab connector is connected to the tab, thus enabling the connector to connect the tab and the housing together.

[0494] Specifically, the electrode connector has a receiving space.

[0495] It is understandable that by providing a receiving space for accommodating the encapsulation part in the electrode connector, it is convenient to place the encapsulation part at the electrode connector. This prevents the encapsulation part from coming into contact with other substances, making the encapsulation part less prone to corrosion. This effectively slows down the corrosion rate of the entire electrode connector and improves the structural stability of the electrode connector.

[0496] Specifically, the tab connector has a accommodating space.

[0497] It is understandable that by providing a receiving space for accommodating the encapsulation part in the tab connector, it is convenient to place the encapsulation part at the tab connector. This prevents the location of the encapsulation part in the tab connector from coming into contact with other substances, making the location of the encapsulation part in the tab connector less prone to corrosion. This can effectively slow down the corrosion rate of the entire tab connector and improve the structural stability of the tab connector.

[0498] Specifically, there is a space between the electrode connector and the tab connector.

[0499] It is understandable that by providing a receiving space between the electrode connector and the tab connector to accommodate the encapsulation part, it is convenient to place the encapsulation part between the electrode connector and the tab connector. This prevents the connection between the electrode connector and the tab connector from contacting other substances, making the connection between the electrode connector and the tab connector less prone to corrosion. This can effectively slow down the corrosion rate at the connection between the electrode connector and the tab connector and improve the connection stability of the electrode connector and the tab connector.

[0500] Specifically, an accommodating space is formed between the electrode connector and the housing.

[0501] It is understandable that by providing a receiving space between the electrode connector and the housing to accommodate the encapsulation part, it is convenient to place the encapsulation part between the electrode connector and the housing. This prevents the connection between the electrode connector and the housing from contacting other substances, making the connection between the electrode connector and the housing less prone to corrosion. This can effectively slow down the corrosion rate at the connection between the electrode connector and the housing and improve the connection stability between the electrode connector and the housing.

[0502] Specifically, there is a space between the tab connector and the housing.

[0503] Understandably, the encapsulation section can separate the tab connector from the housing, preventing direct contact between the tab connector and the housing, and preventing corrosion at the connection point between the tab connector and the housing caused by contact between the tab connector and the housing.

[0504] In some embodiments, the electrode connector includes a first connecting segment and a second connecting segment, the second connecting segment connecting the first connecting segment and the housing, and the first connecting segment connecting to the tab connector.

[0505] Specifically, the first electrode connector has a receiving space.

[0506] It is understandable that by providing a receiving space for accommodating the encapsulation part in the first tab connector, it is convenient to place the encapsulation part at the first tab connector. This prevents the position of the first tab connector with the encapsulation part from contacting other substances, making the position of the first tab connector with the encapsulation part less prone to corrosion. This can effectively slow down the corrosion rate of the entire first tab connector and improve the structural stability of the first tab connector.

[0507] Specifically, the second electrode connector has a receiving space.

[0508] It is understandable that by providing a receiving space for accommodating the encapsulation part in the second tab connector, it is convenient to place the encapsulation part at the second tab connector. This prevents the location of the encapsulation part in the second tab connector from contacting other substances, making the location of the encapsulation part in the second tab connector less prone to corrosion. This can effectively slow down the corrosion rate of the entire second tab connector and improve the structural stability of the second tab connector.

[0509] Specifically, a receiving space is formed between the first electrode connector and the second electrode connector.

[0510] It is understandable that by providing a receiving space between the first tab connector and the second tab connector to accommodate the encapsulation part, it is convenient to place the encapsulation part between the first tab connector and the second tab connector. This prevents the connection between the first tab connector and the second tab connector from contacting other substances, making the connection between the first tab connector and the second tab connector less prone to corrosion. This can effectively slow down the corrosion rate at the connection between the first tab connector and the second tab connector, and improve the connection stability of the first tab connector and the second tab connector.

[0511] Specifically, a receiving space is formed between the first electrode connector and the electrode connector.

[0512] It is understandable that by providing a receiving space between the first tab connector and the electrode connector to accommodate the encapsulation part, it is convenient to place the encapsulation part between the first tab connector and the electrode connector. This prevents the connection between the first tab connector and the electrode connector from contacting other substances, making the connection between the first tab connector and the electrode connector less prone to corrosion. This can effectively slow down the corrosion rate at the connection between the first tab connector and the electrode connector and improve the connection stability of the first tab connector and the electrode connector.

[0513] Specifically, a receiving space is formed between the second electrode connector and the housing.

[0514] It is understandable that by providing a receiving space between the second tab connector and the housing to accommodate the encapsulation part, it is convenient to place the encapsulation part between the second tab connector and the housing. The encapsulation part can separate the second tab connector and the housing, avoid direct contact between the second tab connector and the housing, reduce the contact points between the connector and the housing, and prevent corrosion at the contact position between the second tab connector and the housing caused by direct contact between the second tab connector and the housing.

[0515] In some embodiments, the receiving space includes a receiving groove formed in the connector.

[0516] It is understandable that the connector has a receiving groove, which has a receiving space. That is, the receiving groove is used to accommodate the packaging part, and the receiving groove can limit the packaging part, which facilitates the setting and shaping of the packaging part.

[0517] In some embodiments, the connector includes at least two sequentially connected connecting portions, and a receiving groove is provided at the connection point of two adjacent connecting portions.

[0518] It is understandable that by providing a receiving groove for accommodating the encapsulation part at the connection point of the two connecting parts, it is convenient to set the encapsulation part at the connection point of the two connecting parts, so as to effectively isolate the connection point of the two adjacent connecting parts by using the encapsulation part, avoid corrosion at the connection point of the two adjacent connecting parts, and improve the connection stability of the two adjacent connecting parts.

[0519] In some embodiments, the connector is formed with a protrusion, and the protrusion is formed with a receiving groove.

[0520] It is understandable that a protrusion is first set at the connector, and then a receiving groove for accommodating the encapsulation part is formed at the protrusion. This allows the encapsulation part to be set at the connector, while also reducing the impact on the overall thickness of the connector and avoiding the structural strength of the connector being affected by the reduction in the thickness of the connector.

[0521] In some embodiments, a notch is formed at one end of the connector that is connected to the housing, and the wall of the notch and the side wall of the housing form an accommodating space.

[0522] It is understandable that if the notch is formed at the end of the connector that is connected to the housing, the notch is positioned opposite to the side wall of the housing, so that the wall of the notch and the side wall of the housing can form a receiving space for accommodating the encapsulation part, thereby facilitating the placement of the encapsulation part at the connection between the connector and the housing.

[0523] In some embodiments, the battery further includes a first enclosure plate, which is mounted on the connector and has both ends abutting against the side wall of the housing, so that the first enclosure plate and the side wall of the housing form an accommodating space.

[0524] It is understandable that by setting the first enclosure plate at the end of the connector that is connected to the housing, when the connector is connected to the housing, both ends of the first enclosure plate abut against the side wall of the housing, so that the first enclosure plate and the side wall of the housing can form a receiving space for accommodating the encapsulation part, thereby facilitating the setting of the encapsulation part at the connection between the connector and the housing.

[0525] In some embodiments, the connector includes at least two sequentially connected connecting portions, and the battery also includes a second enclosure plate, which is installed on one of the two adjacent connecting portions, with both ends of the second enclosure plate abutting against the other of the two adjacent connecting portions, so that the second enclosure plate and the other of the two adjacent connecting portions form an accommodating space.

[0526] It is understandable that the second enclosure provided at one of the connecting parts can abut against the other connecting part to form a receiving space for accommodating the encapsulation part, thereby facilitating the placement of the encapsulation part at the connection between two adjacent connecting parts.

[0527] In some embodiments, the battery includes:

[0528] case;

[0529] Connector, used to connect the housing and the electrode tab;

[0530] The mounting bracket is fixed inside the housing, and the connector is installed on the mounting bracket.

[0531] According to the battery embodiments of this application, a connector is used to connect the casing and the electrode tabs, enabling the battery to function normally. The connector is mounted on a mounting bracket, which secures the connector, improving its stability and the stability of the connection between the connector and the casing and electrode tabs, thereby ensuring the stability of the battery.

[0532] In some examples, the mounting bracket is fixedly attached to the housing or to the electrode assembly mounted inside the housing.

[0533] In some embodiments, at least a portion of the connector protrudes from the mounting bracket.

[0534] Understandably, the connector protruding from the mounting bracket can be connected to the housing or the electrode tab, which facilitates the connection between the housing and the electrode tab, reduces the impact of the mounting bracket on the connection between the housing and the electrode tab, and ensures that the connector can be connected to the housing and the electrode tab.

[0535] In some embodiments, the connector includes an electrode connector connected to the housing and an electrode tab connector connected to the tab, the electrode tab connector being mounted on a mounting bracket, and the electrode connector protruding at least partially from the mounting bracket.

[0536] It is understandable that the electrode connector can be connected to the tab connector at the mounting bracket, while the electrode connector protruding from the mounting bracket can be connected to the housing, so that the connector can connect the housing and the tab, avoiding the mounting bracket from affecting the connection between the housing and the tab.

[0537] In some embodiments, the mounting bracket has a connection notch, a first end of the electrode connector is connected to the tab connector, a second end of the electrode connector passes through the connection notch and is connected to the housing, and the second end of the electrode connector and the tab connector are located on both sides of the mounting bracket.

[0538] Understandably, the electrode connector is located on one side of the mounting bracket, and the first end of the electrode connector is connected to the electrode connector. The second end of the electrode connector can extend away from the electrode connector through a connection notch, that is, the second end of the electrode connector can pass through the connection notch, so that the second end of the housing portion is located on the other side of the mounting bracket. The electrode connector can be connected to the electrode on one side of the mounting bracket, and the second end of the electrode connector can be connected to the housing on the other side of the mounting bracket, thus facilitating the connection between the housing and the electrode.

[0539] In some embodiments, the tab connector, the wall of the connection notch, and the electrode connector form a packaging cavity for accommodating the packaging portion.

[0540] Understandably, the second end of the electrode connector protrudes from the connection notch, while the tab connector is mounted on the mounting bracket. The tab connector, the wall of the connection notch, and the electrode connector form a packaging cavity. The tab connector serves as the bottom wall of the packaging cavity, while the electrode connector and the wall of the connection notch serve as the side walls of the packaging cavity, allowing the packaging cavity to accommodate the packaging unit and facilitating its installation.

[0541] Understandably, by setting a sealing part inside the sealing cavity, the sealing part can cover the connection between the electrode connector and the tab connector, effectively improving the corrosion resistance of the connection between the electrode connector and the tab connector.

[0542] In some embodiments, the battery further includes an electrode assembly, and the housing has a mounting cavity in which the electrode assembly is mounted.

[0543] The housing has an inner recess that protrudes into the mounting cavity. The mounting bracket is located between the inner recess and the electrode assembly. The connector connects the inner recess and the positive electrode tab of the electrode assembly.

[0544] It is understandable that the mounting bracket is placed between the retracted part and the electrode assembly to facilitate the connection of the connector between the retracted part and the positive electrode tab of the electrode assembly, thereby enabling the connection of the housing and the electrode tab using the connector.

[0545] Specifically, the tab connector is attached to the side of the mounting bracket away from the recessed part.

[0546] It is understandable that the mounting bracket is located between the recessed portion and the electrode assembly, that is, between the recessed portion and the positive tab of the electrode assembly. Therefore, the tab connector is connected to the side of the mounting bracket away from the recessed portion, so that the tab connector is positioned opposite to the positive tab of the electrode assembly, facilitating the connection between the tab connector and the positive tab.

[0547] In some embodiments, the battery further includes an electrode assembly, and the housing has a mounting cavity in which the electrode assembly is mounted.

[0548] The mounting bracket is located between the electrode assembly and the inner bottom wall of the housing, and the connector connects the negative electrode tab of the electrode assembly to the inner bottom wall of the housing.

[0549] Understandably, placing the mounting bracket between the electrode assembly and the inner bottom wall of the housing facilitates the connection of the connector between the negative electrode tab and the inner bottom of the housing, thus enabling the connection between the housing and the negative electrode tab using the connector.

[0550] Specifically, the tab connector is attached to the side of the mounting bracket away from the inner bottom wall of the housing.

[0551] It is understandable that the mounting bracket is located between the electrode assembly and the inner bottom wall of the housing, that is, between the negative electrode tab and the inner bottom wall of the housing. Therefore, the electrode tab connector is connected to the side of the mounting bracket away from the inner bottom wall of the housing, so that the electrode tab connector is positioned opposite to the negative electrode tab of the electrode assembly, which facilitates the connection between the electrode tab connector and the negative electrode tab.

[0552] In some embodiments, the mounting bracket is fixedly connected to the housing.

[0553] It is understandable that by fixing the mounting bracket and the housing together, the mounting bracket is kept in place, and consequently, the connectors attached to the mounting bracket also remain stable.

[0554] In some examples, the mounting bracket can be fixedly connected to the housing, or fixedly mounted on the electrode assembly or any other suitable location.

[0555] Specifically, the connectors include electrode connectors that connect to the housing and electrode tab connectors that connect to the tabs. The part of the mounting bracket that connects to the housing is made of metal, and the part of the mounting bracket that contacts the electrode tab connector is made of insulating material.

[0556] It is understandable that making the part connecting the mounting bracket to the housing a metal material facilitates the connection between the mounting bracket and the housing. Conversely, making the part of the mounting bracket that contacts the tab connector a insulating material prevents the tab connector from being electrically connected to the housing through the mounting bracket.

[0557] Specifically, the mounting bracket is made of metal, and the battery also includes an insulating part, which is located between the tab connector and the mounting bracket.

[0558] Understandably, the mounting bracket can be made of metal to facilitate the connection between the mounting bracket and the housing. Simultaneously, an insulating part is provided between the tab connector and the mounting bracket to insulate and separate the tab connector from the mounting bracket, preventing the tab connector from being electrically connected to the housing through the mounting bracket.

[0559] In some embodiments, an encapsulation portion is provided at the connection between the mounting bracket and the housing.

[0560] Understandably, by providing an encapsulation at the connection between the mounting bracket and the housing, the encapsulation can prevent the connection between the mounting bracket and the housing from coming into contact with other substances (such as electrolyte), effectively avoiding corrosion at the connection between the mounting bracket and the housing and improving the connection stability between the mounting bracket and the housing.

[0561] In some embodiments, the battery includes:

[0562] case;

[0563] Connector, used to connect the housing and the electrode tab;

[0564] The cover plate is attached to the housing and abuts against the connector.

[0565] According to the battery embodiments of this application, a connector is used to connect the casing and the terminals, enabling the battery to operate normally and simultaneously making the connector energized. By abutting the connector against the cover plate, the cover plate is also energized, thereby effectively preventing corrosion of the cover plate, extending its service life, and improving the battery's stability.

[0566] In some embodiments, the battery further includes conductive protrusions that are electrically connected to the cover plate.

[0567] Understandably, the cover plate is located at the end of the battery. By providing conductive protrusions at the connector, the conductive protrusions protrude towards one side of the cover plate, making it easier for the connector to be electrically connected to the cover plate through the conductive protrusions, thereby making the cover plate electrified and preventing corrosion of the cover plate.

[0568] In some embodiments, an encapsulation portion is provided at the connection between the conductive protrusion and the cover plate.

[0569] Understandably, the encapsulation section can isolate the connection between the conductive protrusion and the cover plate, preventing the connection between the conductive protrusion and the cover plate from contacting other substances, making the connection between the conductive protrusion and the cover plate less prone to corrosion, improving the connection stability between the conductive protrusion and the cover plate, and allowing the cover plate to remain charged.

[0570] In some embodiments, the conductive protrusion includes a first conductive connection portion, a second conductive connection portion, and a third conductive connection portion. The first conductive connection portion connects a first end of the second conductive connection portion and a connector. The second conductive connection portion abuts against a cover plate. The third conductive connection portion connects a second end of the second conductive connection portion and a connector.

[0571] It is understandable that the second conductive connection part abuts against the cover plate, and the second conductive connection part is connected to the connector through the first conductive connection part and the third conductive connection part, so that the second conductive connection part becomes charged, thereby charging the cover plate and improving the corrosion resistance of the cover plate.

[0572] Understandably, the first and third conductive parts can support the second conductive part, making the contact between the second conductive part and the cover plate more stable.

[0573] In some embodiments, the first conductive portion and the third conductive portion are disposed at an angle relative to the second conductive portion.

[0574] Understandably, the inclined arrangement of the first and third conductive parts can reduce the distance between the second conductive part and the connector, and reduce the overall height of the conductive protrusion and the connector, which is beneficial for battery miniaturization.

[0575] In some embodiments, the first conductive portion and the third conductive portion have different tilt directions.

[0576] Understandably, the first conductive part, the second conductive part, the third conductive part, and the connector can form a trapezoidal structure, which improves the structural stability of the conductive protrusion.

[0577] In some embodiments, an encapsulation portion is provided at the connection between the first conductive portion and the second conductive portion.

[0578] It is understandable that by providing an encapsulation portion at the connection between the first conductive part and the second conductive part, the encapsulation portion can prevent the connection between the first conductive part and the second conductive part from contacting other substances, making the connection between the first conductive part and the second conductive part less prone to corrosion and improving the connection stability between the first conductive part and the second conductive part.

[0579] In some embodiments, an encapsulation portion is provided at the connection between the second conductive portion and the third conductive portion.

[0580] It is understandable that by providing an encapsulation portion at the connection between the second conductive portion and the third conductive portion, the encapsulation portion can prevent the connection between the second conductive portion and the third conductive portion from contacting other substances, making the connection between the second conductive portion and the third conductive portion less prone to corrosion and improving the connection stability between the second conductive portion and the third conductive portion.

[0581] In some embodiments, an encapsulation portion is provided at the connection between the first conductive portion and the connector.

[0582] It is understandable that by providing an encapsulation portion at the connection between the first conductive part and the connector, the encapsulation portion can prevent the connection between the first conductive part and the connector from contacting other substances, making the connection between the first conductive part and the connector less prone to corrosion and improving the connection stability between the first conductive part and the connector.

[0583] In some embodiments, an encapsulation portion is provided at the connection between the third conductive portion and the connector.

[0584] It is understandable that by providing an encapsulation part at the connection between the third conductive part and the connector, the encapsulation part can prevent the connection between the third conductive part and the connector from coming into contact with other substances, making the connection between the third conductive part and the connector less prone to corrosion and improving the connection stability between the third conductive part and the connector.

[0585] In some embodiments, the conductive protrusions are made of the same material as the cover plate, and the conductive protrusions are fixedly connected to the cover plate by welding.

[0586] Understandably, when the conductive protrusion and the cover plate are made of the same material, they can be directly fixed together by welding, which improves the stability and sealing of the connection between the conductive protrusion and the cover plate.

[0587] In some embodiments, the conductive protrusion and the cover plate are made of different materials, and the conductive protrusion is connected to the cover plate by at least one of the following methods: snap-fit, threaded connection, and interference fit.

[0588] It is understandable that when the conductive protrusion and the cover plate are made of different materials, it is difficult to fix the conductive protrusion and the cover plate together by welding. Therefore, this embodiment uses at least one of the following methods to fix the conductive protrusion and the cover plate together: snap-fit, threaded connection, and interference fit.

[0589] In some embodiments, the connector includes an electrode connector connected to the housing and an electrode tab connector connected to the tab, and an encapsulation portion is provided at the electrode connector and / or the electrode tab connector.

[0590] It is understandable that the electrode connector is connected to the housing, and the tab connector is connected to the tab, thus connecting the housing and the tab using the electrode connector and the tab connector.

[0591] It is understandable that an encapsulation part is provided at the electrode connector. This encapsulation part can be located on the electrode connector itself, at the connection between the electrode connector and the tab connector, or at the connection between the electrode connector and the housing. In other words, the encapsulation part can improve the corrosion resistance of the electrode connector, improve the corrosion resistance at the connection between the electrode connector and the tab connector, making the connection between the electrode connector and the tab connector more stable, and also improve the corrosion resistance at the connection between the electrode connector and the housing, making the connection between the electrode connector and the housing more stable.

[0592] In some embodiments, the conductive protrusion is connected to the tab connector and protrudes from the tab connector.

[0593] Understandably, the conductive protrusions protrude towards the side of the cover plate to facilitate the connection between the conductive protrusions and the cover plate.

[0594] In some embodiments, an encapsulation portion is provided at the connection between the conductive protrusion and the electrode connector.

[0595] Understandably, the encapsulation section can improve the corrosion resistance at the connection between the conductive protrusion and the tab connector, making the connection between the conductive protrusion and the tab connector more stable.

[0596] In some embodiments, the battery further includes a seal disposed at the junction of the cover and the housing.

[0597] It is understandable that a seal is installed at the connection between the cover and the housing, as the seal can improve the sealing performance of the connection between the cover and the housing.

[0598] According to an embodiment of the second aspect of this application, the electrical device includes the battery described above.

[0599] According to the embodiments of this application, the electrical device has an encapsulation part 3 provided at the connection between the electrode lead-out portion 201 and the tab connection portion 202. The encapsulation part 3 prevents impurities from entering the connection between the electrode lead-out portion 201 and the tab connection portion 202, avoiding impurities from affecting the connection strength between the electrode lead-out portion 201 and the tab connection portion 202, thus improving the connection stability between the connector 2 and the battery tabs and the battery electrodes. By providing the encapsulation part 3 at the connection between the electrode lead-out portion 201 and the electrode, the encapsulation part 3 prevents impurities from entering the connection between the electrode lead-out portion 201 and the electrode, avoiding impurities from affecting the connection strength between the electrode lead-out portion 201 and the electrode, thus improving the connection stability between the electrode lead-out portion 201 and the electrode, thereby improving the connection stability between the battery tabs and the battery electrodes, and ultimately improving the stability of the battery and the electrical device.

[0600] It should be noted that electrical equipment can be vehicles, aircraft, or household appliances. It is important to note that the above examples are merely illustrative and do not impose any specific limitations on the types of electrical equipment used.

[0601] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery, characterized in that, The device includes a housing, an electrode assembly, a connector, and an encapsulation portion. The electrode assembly is installed inside the housing. The connector has an electrode lead-out portion and a tab connection portion. The electrode lead-out portion is used to connect to the electrodes of the battery, and the tab connection portion is used to connect to the tabs of the battery. Wherein, at least a portion of the encapsulation portion is disposed at the connection between the electrode lead-out portion and the tab connection portion, and / or at least a portion of the encapsulation portion is disposed at the connection between the electrode lead-out portion and the electrode of the battery.

2. The battery according to claim 1, characterized in that, The electrodes of the battery include the battery casing or battery terminals.

3. The battery according to claim 1, characterized in that, The connector includes an electrode connector and a tab connector connected in sequence. The electrode connector has an electrode lead-out portion, and the tab connector has a tab connection portion.

4. The battery according to claim 3, characterized in that, The encapsulation portion is provided at the connection point between the electrode connector and the electrode of the battery; and / or, The encapsulation portion is provided at the connection between the electrode connector and the tab connector; and / or, The electrode connector and the tab connector are simultaneously in contact with the encapsulation portion; and / or The electrode connector and the battery electrode are simultaneously in contact with the encapsulation part.

5. The battery according to claim 3, characterized in that, The battery includes a housing, and the encapsulation portion is provided at the connection between the electrode connector and the housing.

6. The battery according to claim 5, characterized in that, The encapsulation portion extends to the side wall of the housing and abuts against the side wall of the housing.

7. The battery according to claim 5, characterized in that, The electrode connector is spaced apart from the housing.

8. The battery according to claim 5, characterized in that, Along the radial direction of the housing, the length of the tab connector is L1, and the diameter of the housing is L2, wherein the ratio of L1 to L2 is between 0.01 and 0.

99.

9. The battery according to claim 8, characterized in that, Along the radial direction of the housing, the distance between the tab connector and the housing is L3, where L1+2L3≤L2.

10. The battery according to claim 5, characterized in that, Along the axial direction of the housing, the height of the fixed connection portion between the electrode connector and the housing is L6, and the height of the contact portion between the electrode connector and the housing is L7. <L6≤L7≤15mm。 11. The battery according to claim 5, characterized in that, Along the radial direction or along the axial direction of the housing, the length of the fixed connection portion between the electrode connector and the tab connector is less than the length of the contact portion between the electrode connector and the tab connector.

12. The battery according to claim 9, characterized in that, Along the radial direction of the housing, the length of the fixed connection portion between the electrode connector and the tab connector is L8, and the ratio of L8 to L1 is between 0.05 and 0.

5.

13. The battery according to claim 3, characterized in that, The thickness of the electrode connector is between 0.05 mm and 2 mm.

14. The battery according to claim 3, characterized in that, The thickness of the electrode connectors is between 0.05mm and 2mm.

15. The battery according to claim 5, characterized in that, The thickness of the shell is between 0.2 mm and 1 mm.

16. The battery according to claim 3, characterized in that, The hardness of at least one of the tab connector and the electrode connector is between HV 50 and HV 120.

17. The battery according to claim 3, characterized in that, At least one of the tab connector and the electrode connector has a tensile strength greater than 180 MPa.

18. The battery according to claim 3, characterized in that, The impedance of at least one of the tab connector and the electrode connector is less than 2mΩ.

19. The battery according to claim 5, characterized in that, The shell hardness is between HV 80 and HV 200; and / or, the tensile strength of the shell is between 240 MPa and 600 MPa; and / or, the impedance of the shell is less than 2 mΩ.

20. The battery according to claim 5, characterized in that, The electrode connector includes a first side and a second side disposed opposite to each other. The first side is connected to the housing, and the electrode tab connector is connected to the second side.

21. The battery according to claim 3, characterized in that, The first end of the electrode connector is connected to the tab connector, and the second end of the electrode connector protrudes from the tab connector. A receiving space is formed between the second end of the electrode connector and the tab connector, and / or between the first end of the electrode connector and the tab connector. The receiving space is used to receive the encapsulation part.

22. The battery according to claim 21, characterized in that, Some of the electrode connectors are stacked on one side of the tab connector.

23. The battery according to claim 5, characterized in that, At least two of the electrode connectors, along the radial direction of the housing, have at least two different contact portions with the tab connector of different lengths.

24. The battery according to claim 5, characterized in that, The electrode connector includes a first connecting segment and a second connecting segment. The second connecting segment connects the first connecting segment and the housing. The second end of the first connecting segment protrudes or bends away from the electrode connector relative to the first end of the first connecting segment. Wherein, a receiving space is formed between the first end of the first connecting segment and the electrode connector, and / or between the second end of the first connecting segment and the electrode connector.

25. The battery according to claim 24, characterized in that, The encapsulation portion is provided at the connection between the first connecting segment and the second connecting segment; or, the encapsulation portion is provided at least part of the first connecting segment; or, the encapsulation portion is provided at least part of the second connecting segment; or, the encapsulation portion is provided between the second connecting segment and the housing.

26. The battery according to claim 24, characterized in that, The second connecting segment is located on the side of the first connecting segment away from the inner bottom wall of the housing.

27. The battery according to claim 24, characterized in that, The electrode connector further includes a third connecting segment, which connects the first connecting segment and the second connecting segment.

28. The battery according to claim 27, characterized in that, The encapsulation part is provided at the connection between the third connecting segment and the first connecting segment; or, the encapsulation part is provided at the connection between the third connecting segment and the second connecting segment; or, the encapsulation part is provided at least part of the third connecting segment.

29. The battery according to claim 27, characterized in that, Along the radial direction of the housing, the length of the tab connector is L1, and the diameter of the housing is L2, wherein the ratio of L1 to L2 is between 0.1 and 0.

95.

30. The battery according to claim 27, characterized in that, Along the radial direction of the housing, the distance between the end of the electrode connector and the inner wall surface of the housing is L10, wherein, The second connecting segment has a first surface facing the first connecting segment, the intersection line of the extended surface of the first surface and the side wall surface of the housing is a first intersection line, the tab connector has a second surface facing away from the first connecting segment, the intersection line of the extended surface of the second surface and the side wall surface of the housing is a second intersection line, the vertical distance between the first intersection line and the second intersection line is L11, L10≤L11; and / or, Along the radial direction of the housing, the length of the contact portion between the electrode connector and the tab connector is L9, where L10 ≤ L9.

31. The battery according to any one of claims 5 to 30, characterized in that, The electrode connector includes a first electrode connector and a second electrode connector. The first electrode connector is connected to the end of the second electrode connector. The second electrode connector is used to connect the electrode. The electrode connector is connected to the side of the first electrode connector opposite to the second electrode connector.

32. The battery according to claim 31, characterized in that, The first electrode connector and the housing are spaced apart.

33. The battery according to claim 32, characterized in that, The intersection line between the extended surface of the second electrode connector facing away from the electrode connector and the side wall of the housing is the third intersection line, and the intersection line between the end face of the electrode connector facing the second electrode connector and the side wall of the housing is the fourth intersection line. The vertical distance between the third intersection line and the fourth intersection line is greater than 0.12 mm.

34. The battery according to claim 31, characterized in that, Along the axial direction of the housing, the height of the electrode connector is less than the height of the first electrode tab connector, wherein, The encapsulation portion is provided between the first end of the first tab connector and the first end of the electrode connector; and / or, An encapsulation space is formed between the second end of the first tab connector and the second end of the electrode connector, the encapsulation space being used to accommodate the encapsulation portion.

35. The battery according to claim 31, characterized in that, Along the radial direction of the housing, the orthographic projection of the first electrode connector onto the side wall of the housing at least partially coincides with the orthographic projection of the electrode connector onto the side wall of the housing. or, Along the radial direction of the housing, the orthographic projection of the electrode connector onto the side wall of the housing lies within the orthographic projection of the first tab connector onto the side wall of the housing.

36. The battery according to claim 31, characterized in that, The first electrode connector has a receiving groove formed on the side of the side wall near the housing. Part of the electrode connector is located in the receiving groove, and another part of the electrode connector protrudes from the receiving groove and is connected to the housing.

37. The battery according to claim 36, characterized in that, A gap is provided between the electrode lead-out portion and the side wall of the receiving groove, and the encapsulation portion is at least partially disposed within the gap; and / or, an encapsulation portion is provided between the side wall surfaces of the electrode connector and the tab connector facing the side wall of the housing.

38. The battery according to claim 36, characterized in that, Along the radial direction of the housing, the thickness of the electrode connector is less than the thickness of the first tab connector.

39. The battery according to claim 36, characterized in that, The first electrode connector has the encapsulation portion on the side near the center of the housing.

40. The battery according to any one of claims 5 to 30, characterized in that, The contact area between the tab connector and the tab is S1, the welding area between the tab connector and the tab is s1, and the current-carrying capacity per unit area of ​​metal at the contact position between the tab connector and the tab is I1; the contact area between the tab connector and the electrode connector is S2, the welding area between the tab connector and the electrode connector is s2, and the current-carrying capacity per unit area of ​​metal at the contact position between the tab connector and the electrode connector is I2; the contact area between the electrode connector and the housing is S3, the welding area between the electrode connector and the housing is s3, and the current-carrying capacity per unit area of ​​metal at the contact position between the electrode connector and the housing is I3; the current-carrying requirement of the battery is a; wherein... S1≥a / I1, S2≥a / I2, S3≥a / I3; and / or, s1 / S1=10%-90%, s2 / S2=10%-90%, s3 / S3=10%-90%.

41. The battery according to claim 40, characterized in that, The connector includes multiple electrode connectors, each electrode connector being an arc-shaped block. The multiple electrode connectors are coaxial, and the sum of the arc lengths of the two sides and the arc length of the outer wall of the electrode connector is R1. The height of the contact portion between the electrode connector and the housing is H1, where R1×H1≥a / I2.

42. The battery according to any one of claims 1 to 30, characterized in that, The battery also includes a mounting bracket, which is fixed inside the housing. The connector is mounted on the mounting bracket, and the mounting bracket is used to support the connector.

43. The battery according to claim 42, characterized in that, The connector includes an electrode connector connected to the housing and an electrode tab connector connected to the electrode tab. The mounting bracket forms a limiting part, the electrode tab connector is fixedly connected to one side of the mounting bracket, and the electrode lead-out part is provided at the limiting part.

44. The battery according to claim 43, characterized in that, The limiting part includes a limiting groove, the limiting groove having a connecting hole, the electrode connector includes a first end and a second end disposed opposite to each other, the first end of the electrode connector passes through the connecting hole and connects to the tab connector, and the second end of the electrode connector passes through the opening of the limiting groove and connects to the housing.

45. The battery according to claim 44, characterized in that, The limiting groove is filled with the encapsulation part.

46. ​​The battery according to any one of claims 5 to 30, characterized in that, The housing has a mounting cavity; The housing has a recessed portion that protrudes into the mounting cavity. The connector is located between the recessed portion and the electrode assembly, and the connector connects the recessed portion and the positive electrode tab of the electrode assembly.

47. The battery according to any one of claims 5 to 30, characterized in that, The housing has a mounting cavity; The connector is located between the electrode assembly and the inner bottom wall of the housing, and the connector connects the negative electrode tab of the electrode assembly and the inner bottom wall of the housing.

48. The battery according to claim 46, characterized in that, The tab connector is spaced apart from the inward portion.

49. The battery according to claim 46, characterized in that, The connector includes a tab connector connected to the tab, and the tab connector has a clearance space on the side facing the inward portion. The clearance space is used to accommodate the inward portion so that the inward portion and the tab connector are spaced apart.

50. The battery according to claim 49, characterized in that, The tab connector has a clearance groove on the side facing the inward portion. The clearance groove is used to accommodate the inward portion so that the inward portion is spaced apart from the tab connector.

51. The battery according to any one of claims 1 to 30, characterized in that, The battery also includes a cover plate, and the connector is electrically connected to the cover plate.

52. The battery according to claim 51, characterized in that, The cover plate and the housing are insulated from each other.

53. The battery according to any one of claims 1 to 30, characterized in that, The encapsulation part is an encapsulating adhesive or a thermoplastic film.

54. The battery according to any one of claims 1 to 30, characterized in that, The encapsulation part has an irregular shape.

55. The battery according to any one of claims 1 to 30, characterized in that, The thickness of the encapsulation portion is uniform along the axial direction or the radial direction of the battery.

56. The battery according to any one of claims 1 to 30, characterized in that, The thickness of the encapsulation portion is uneven along the axial direction or the radial direction of the battery.

57. The battery according to any one of claims 1 to 30, characterized in that, The thickness of the encapsulation portion is between 1 mm and 2 mm along the axial direction or radial direction of the battery.

58. The battery according to any one of claims 1 to 30, characterized in that, The encapsulation portion includes an encapsulation layer and an insulating protective layer, wherein... The encapsulation layer is disposed at the connection between the electrode lead-out portion and the tab connection portion, and the encapsulation layer is located on the side of the encapsulation layer opposite to the connection between the electrode lead-out portion and the tab connection portion; or... The encapsulation layer is disposed at the connection between the electrode lead and the electrode of the battery, and the insulating protective layer is connected to the side of the encapsulation layer opposite to the connection between the electrode lead and the electrode.

59. The battery according to claim 58, characterized in that, The encapsulation portion protrudes from the connection point between the electrode lead-out portion and the tab connection portion.

60. The battery according to claim 59, characterized in that, Along the axial direction of the housing, the length of the encapsulation portion protruding from the connection between the electrode lead-out portion and the tab connection portion is between 0 mm and 4 mm.

61. The battery according to claim 59, characterized in that, The encapsulation portion protrudes from the connection point between the electrode lead-out portion and the electrode of the battery.

62. The battery according to claim 61, characterized in that, Along the axial direction of the housing, the length of the encapsulation portion protruding from the connection point between the electrode lead and the electrode of the battery is between 0 mm and 4 mm.

63. The battery according to any one of claims 1 to 30, characterized in that, The connector has a symmetrical structure.

64. The battery according to any one of claims 1 to 30, characterized in that, One of the battery casing, the electrode lead-out portion, and the tab connection portion is a first metal component, and the other two are second metal components. The first metal component and the second metal component are made of different metal materials, and the encapsulation portion is provided at the connection between the first metal component and the second metal component.

65. The battery according to claim 64, characterized in that, Both the electrode lead-out portion and the electrode tab connection portion are the second metal parts, the housing is the first metal part, and the encapsulation portion is provided at the connection between the electrode lead-out portion and the housing.

66. The battery according to claim 65, characterized in that, Both the electrode lead-out portion and the housing are the second metal parts, the tab connection portion is the first metal part, and the encapsulation portion is provided at the connection between the electrode lead-out portion and the tab connection portion.

67. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1 to 66.

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