Hard case battery and electronic apparatus

Abstract

Disclosed in the present application are a hard case battery and an electronic apparatus. The hard case battery comprises a case, an electrode assembly, a first electrode terminal and a first insulating member. The case is conductively arranged, the electrode assembly is arranged inside the case, and the electrode assembly comprises a first electrode sheet, a second electrode sheet and a separator arranged between the first electrode sheet and the second electrode sheet. The first electrode terminal is at least partially located on the side of the electrode assembly in a first direction; the first electrode terminal comprises a first tab group, the first tab group comprising a plurality of first tabs which are stacked, and the first tabs being connected to the first electrode sheet. In a second direction, the first insulating member is arranged on the side of the first electrode terminal, and the first insulating member is in contact with both the first tab group and the case. The first direction is perpendicular to the second direction, and the second direction is parallel to the thickness direction of the electrode assembly. The first insulating member is arranged on the side of the first tab group in the second direction, which helps to inhibit shaking of the first tab group, thus helping to improve the safety and reliability of hard case batteries.

Description

Hard-shell batteries and electronic devices Technical Field

[0001] This application relates to the field of energy storage technology, and more particularly to a hard-shell battery and electronic device. Background Technology

[0002] With the widespread use of electronic devices, improving the user experience has become an industry goal, and battery safety and reliability affect the user experience of electronic devices.

[0003] When a steel-cased battery is subjected to an impact, the tabs located inside the casing are prone to shaking, which may cause damage to the tabs, short circuits, and other issues, affecting the safety and reliability of the battery.

[0004] Summary of the Invention

[0005] In view of this, this application provides a hard-shell battery and an electronic device that are beneficial to improving the performance and lifespan of the hard-shell battery.

[0006] In a first aspect, this application provides a hard-shell battery, comprising a casing, an electrode assembly, a first electrode terminal, and a first insulating member. The casing is electrically conductive. The electrode assembly is disposed within the casing and includes a first electrode, a second electrode, and a separator disposed between the first and second electrodes. At least a portion of the first electrode terminal is located on one side of the electrode assembly along a first direction. The first electrode terminal includes a first tab assembly comprising a plurality of stacked first tabs, and the first tabs are connected to the first electrode. Along a second direction, the first insulating member is disposed on one side of the first electrode terminal, and the first insulating member is in contact with both the first tab assembly and the casing. The first direction is perpendicular to the second direction, and the second direction is parallel to the thickness direction of the electrode assembly.

[0007] In the above embodiments, the first insulating member is disposed on one side of the first tab group along the second direction, which reduces the gap between the first tab group and the shell along the second direction. This helps to suppress the shaking of the first tab group and reduce the risk of damage to the first tab. The first insulating member also reduces the possibility of the first tab group contacting the shell, which helps to reduce the risk of short circuit and shell electrification in the hard-shell battery, thereby improving the safety and reliability of the hard-shell battery.

[0008] In one or more embodiments of this application, the first tab assembly includes a first aggregation segment, a first bending segment, and a first connecting segment arranged sequentially. The first aggregation segment is connected to the electrode assembly, and the first connecting segment extends along a second direction. Along the second direction, the housing includes a first wall and a second wall disposed opposite to each other. The first insulating member is in contact with both the first tab assembly and the first wall. The distance between the first bending segment and the first wall is less than the distance between the first bending segment and the second wall. Along the second direction, the projection of the first bending segment overlaps with the projection of the first insulating member.

[0009] In the above embodiments, along the second direction, the projection of the first bending segment overlaps with the projection of the first insulating member. On the one hand, this helps the first insulating member to abut against the first bending segment when the hard-shell battery is impacted, thereby helping to suppress the shaking of the first tab assembly. On the other hand, the first insulating member acts to block the first bending segment from contacting the shell, which helps to reduce the risk of short circuit caused by the first bending segment contacting the shell.

[0010] In one or more embodiments of this application, the hard-shell battery further includes a second insulating member. Along a second direction, the second insulating member is disposed on the side of the first electrode terminal opposite to the first insulating member, and the second insulating member is in contact with both the first tab assembly and the second wall.

[0011] In the above embodiments, the second insulating member is disposed on the side of the first electrode terminal away from the first insulating member, and the second insulating member is in contact with both the first electrode group and the second wall, which further reduces the gap between the first electrode group and the shell along the second direction, which helps to suppress the shaking of the first electrode group and reduces the risk of damage to the first electrode. The second insulating member also further reduces the possibility of the first electrode group contacting the shell, which helps to reduce the risk of short circuit or shell electrification of the hard-shell battery, thereby further improving the safety and reliability of the hard-shell battery.

[0012] In one or more embodiments of this application, the first electrode terminal further includes a first adapter, which includes a second connecting segment, a second bent segment, and a third connecting segment arranged sequentially. The second connecting segment is connected to the first connecting segment, and the bending direction of the second bent segment is opposite to that of the first bent segment. Along a first direction, the third connecting segment is located on the side of the first connecting segment opposite to the first agglomeration segment. Along a second direction, the distance between the second bent segment and the second wall is less than the distance between the second bent segment and the first wall. Along the second direction, the projection of the second bent segment overlaps with the projection of the second insulating member.

[0013] In the above embodiments, along the second direction, the projection of the second bending segment overlaps with the projection of the second insulating member. On the one hand, this helps the second insulating member to abut against the first bending segment when the hard-shell battery is impacted, thereby helping to suppress the shaking of the first tab assembly. On the other hand, the second insulating member acts to prevent the second bending segment from contacting the shell, which helps to reduce the risk of short circuit caused by the second bending segment contacting the shell.

[0014] In one or more embodiments of this application, along a first direction, the housing includes a third wall and a fourth wall disposed opposite to each other, and the distance between the first electrode terminal and the third wall is less than the distance between the first electrode terminal and the fourth wall. Along the first direction, the distance between the first insulating member and the third wall is L1, satisfying L1 ≥ 0.1 mm.

[0015] In the above embodiments, when L1≥0.1mm, the distance between the first insulating member and the third wall along the first direction will not be too close, which helps to reduce the risk of interference between the first insulating member and the shell and facilitates the encapsulation of the shell.

[0016] In one or more embodiments of this application, the first electrode includes a first current collector and a first active material layer stacked together. The first electrode has a first region and a second region connected together. Along a first direction, the first region is closer to the first electrode terminal than the second region, and the thickness of the first active material layer in the first region is less than the thickness of the first active material layer in the second region. The first insulating member includes a first portion and a second portion arranged along the first direction. Along a second direction, the first portion is located between the housing and the electrode assembly, and the projection of the first portion is located within the first region. The second portion is located between the housing and the first tab assembly.

[0017] In the above embodiments, along the second direction, the first part of the first insulating member is located between the housing and the electrode assembly, and the projection of the first part is located within the first region. The second part is located between the housing and the first tab group. This is beneficial for the first insulating member to suppress the shaking of the first tab group, reduce the risk of short circuit in the hard-shell battery and the casing becoming charged, and also helps to compensate for the thickness of the thinner first region, improve the uniformity of pressure on the electrode assembly, thereby improving the interface performance of the electrode assembly.

[0018] In one or more embodiments of this application, along a first direction, the housing includes a third wall and a fourth wall disposed opposite to each other, and the distance between the first electrode terminal and the third wall is less than the distance between the first electrode terminal and the fourth wall. The thickness of the first active material layer in the first region gradually decreases along the direction from the fourth wall to the third wall, and the thickness of the first portion gradually increases along the direction from the second wall to the first wall, and the first portion is in contact with the electrode assembly.

[0019] In the above embodiments, the thickness of the first part gradually increases along the direction from the fourth wall to the third wall, which is beneficial for the first part to fit with the thinner part of the electrode assembly, thereby helping to compensate for the thickness of the first region, improve the uniformity of pressure on the electrode assembly, and improve the interface performance of the electrode assembly.

[0020] In one or more embodiments of this application, the first portion has an inclined surface in contact with the electrode assembly, the inclined surface having a slope K that satisfies 0.005≤K≤0.14.

[0021] In the above embodiments, when K satisfies 0.005≤K≤0.14, it is beneficial for the first part and the thinner part of the electrode assembly to fit together, thereby helping to compensate for the thickness of the first region, improve the uniformity of pressure on the electrode assembly, and improve the interface performance of the electrode assembly.

[0022] [Amended according to Rule 26 29.05.2026] In one or more embodiments of this application, along the first direction, the length of the first portion is L2, which satisfies 2.5mm≤L2≤10.5mm.

[0023] [Revised according to Rule 26, 29.05.2026] In the above embodiments, when L2 satisfies 2.5mm≤L2≤10.5mm, on the one hand, the first part will not be too long and will extend beyond the first region along the first direction, which is conducive to reducing the space occupied by the first insulating member. On the other hand, the first part will not be too short, which is conducive to improving the comprehensiveness of the first insulating member in compensating for the thickness of the first region, thereby improving the uniformity of the electrode assembly under pressure and improving the interface performance of the electrode assembly.

[0024] [Amended according to Rule 26 29.05.2026] In one or more embodiments of this application, along the first direction, the length of the second part is L3, satisfying 0.1mm≤L3≤0.3mm.

[0025] [According to Rule 26, amended 29.05.2026] In the above embodiment, when L3 satisfies 0.1mm≤L3≤0.3mm, on the one hand, the second part will not be too long and interfere with the shell, which is beneficial to the encapsulation of the shell. On the other hand, the second part will not be too short, which is beneficial to the overlap between the projection of the second part along the second direction and the projection of the first bending segment along the second direction. This is beneficial to the first insulating member abutting against the first bending segment when the hard-shell battery is impacted, which is beneficial to suppress the shaking of the first tab group and reduce the risk of short circuit caused by the first bending segment contacting the shell.

[0026] [Amended according to Rule 26, 29.05.2026] In one or more embodiments of this application, along a third direction, the first portion has a first edge and a second edge disposed opposite to each other, the first direction, the second direction, and the third direction being perpendicular to each other. Along the second direction, the projection of the first region onto the first insulating member lies between the first edge and the second edge.

[0027] [Revised according to Rule 26, 29.05.2026] In the above embodiment, along the second direction, the projection of the first region on the first insulating member is located between the first edge and the second edge, which is beneficial to allow the first insulating member to extend beyond the electrode assembly along the third direction, and is beneficial to suppress the warping of the edges of the first electrode and the second electrode in the electrode assembly along the third direction.

[0028] [Amended according to Rule 26, 29.05.2026] In one or more embodiments of this application, along a third direction, the housing includes a fifth wall and a sixth wall disposed opposite to each other, the distance between the fifth wall and the first edge being less than the distance between the fifth wall and the second edge. The distance between the first edge and the fifth wall is D1, and the distance between the second edge and the sixth wall is D2, satisfying 0.1mm≤D1≤1.5mm and 0.1mm≤D2≤1.5mm.

[0029] [Revised according to Rule 26, 29.05.2026] In the above embodiments, when 0.1mm≤D1≤1.5mm and 0.1mm≤D2≤1.5mm are satisfied, on the one hand, the distance between the first part and the fifth and sixth walls will not be too small, which is beneficial to the installation of the electrode assembly and the first insulating member and reduces the space occupied by the first insulating member. On the other hand, the first part will not be too short, which is beneficial to allow the first insulating member to extend beyond the electrode assembly in the third direction, thereby helping to suppress the warping of the edges of the first and second electrodes in the electrode assembly in the third direction.

[0030] In one or more embodiments of this application, along the second direction, the overlapping area of ​​the first portion and the first region occupies 80%-100% of the area of ​​the first region.

[0031] In the above embodiments, when the requirement of 80%-100% is met, it is beneficial to improve the comprehensiveness of the first insulating member in compensating for the thickness of the first region, thereby improving the uniformity of pressure on the electrode assembly and enhancing the interface performance of the electrode assembly.

[0032] In one or more embodiments of this application, the first insulating member includes a structural portion integrally disposed with the housing and an insulating portion disposed on the surface of the structural portion.

[0033] In the above embodiments, the structural part integrally formed with the shell is beneficial to the shaping of the first insulating member, and also helps to reduce the risk of the first insulating member moving inside the shell when the hard-shell battery is impacted. It also helps the first insulating member to play the role of restricting the movement of the electrode assembly, reduces the risk of cracking at the shell weld, and improves the reliability of the hard-shell battery.

[0034] In one or more embodiments of this application, the hard-shell battery further includes a second electrode terminal located on one side of the electrode assembly along a first direction. The second electrode terminal includes a second tab group, which comprises a plurality of stacked second tabs, and the second tabs are connected to a second electrode plate. Along a second direction, a first insulating member is disposed on one side of the second electrode terminal, and the first insulating member is in contact with both the second tab group and the casing.

[0035] In the above embodiment, along the second direction, the first insulating member is disposed on one side of the second electrode terminal. The first insulating member is in contact with both the second electrode assembly and the housing, reducing the gap between the second electrode assembly and the housing along the second direction. This helps to suppress the shaking of the second electrode assembly and reduces the risk of damage to the second electrode assembly. The first insulating member also reduces the possibility of the second electrode assembly contacting the housing, which helps to reduce the risk of short circuit and charged housing in the hard-shell battery, thereby improving the safety and reliability of the hard-shell battery.

[0036] In one or more embodiments of this application, the housing is a stainless steel housing and the first electrode tab is a cathode electrode tab, which helps to provide insulation between the housing and the electrode assembly and reduce the risk of short circuit.

[0037] In one or more embodiments of this application, the housing is an aluminum housing and the first electrode tab is an anode electrode tab, which helps to provide insulation between the housing and the electrode assembly and reduce the risk of short circuit.

[0038] In a second aspect, this application also provides an electronic device including the hard-shell battery of any of the above embodiments.

[0039] In the above embodiments, the improved safety and reliability of the hard-shell battery contribute to enhancing the reliability and user experience of electronic devices.

[0040] The hard-shell battery of this application includes a casing, an electrode assembly, a first electrode terminal, and a first insulating member. The casing is electrically conductive. The electrode assembly is disposed within the casing. At least a portion of the first electrode terminal is located on one side of the electrode assembly along a first direction. The first electrode terminal includes a first tab group, which includes a plurality of stacked first tabs, and the first tabs are connected to a first electrode plate. Along a second direction, the first insulating member is disposed on one side of the first electrode terminal. The first insulating member is in contact with both the first tab group and the casing, reducing the gap between the first tab group and the casing along the second direction. This helps to suppress the shaking of the first tab group and reduces the risk of damage to the first tabs. The first insulating member also reduces the possibility of the first tab group contacting the casing, which helps to reduce the risk of short circuit in the hard-shell battery, thereby improving the safety and reliability of the hard-shell battery. Attached Figure Description

[0041] Figure 1 is a schematic diagram of the structure of a hard-shell battery provided in an embodiment of this application.

[0042] Figure 2 is a schematic diagram of an electrode assembly, a first electrode terminal, and a second electrode terminal provided in an embodiment of this application.

[0043] Figure 3 is a simplified cross-sectional view of a hard-shell battery provided in an embodiment of this application.

[0044] Figure 4 is a schematic diagram of the stacking of the first electrode, the separator, and the second electrode provided in an embodiment of this application.

[0045] Figure 5 is a partial cross-sectional view of a hard-shell battery provided in an embodiment of this application.

[0046] Figure 6 is a cross-sectional view of the first electrode provided in an embodiment of this application.

[0047] Figure 7 is a schematic diagram of the first insulating component in Figure 3.

[0048] Figure 8 is a partial schematic diagram of a hard-shell battery provided in an embodiment of this application.

[0049] Figure 9 is a cross-sectional view of a hard-shell battery provided in one embodiment of this application from another angle.

[0050] Figure 10 is a cross-sectional view of a hard-shell battery provided in another embodiment of this application.

[0051] Figure 11 is a schematic diagram of an electronic device provided in an embodiment of this application.

[0052] Key Component Symbols Explanation: Hard-shell battery 100 Casing 10 First wall 11 Second wall 12 Third wall 13 Fourth wall 14 Fifth wall 15 Sixth wall 16 Electrode assembly 20 First electrode 21 First current collector 211 First active material layer 212 First region 21a Second region 21b Second electrode 22 Second current collector 221 Second active material layer 222 Separator 23 First electrode terminal 30 First tab assembly 31 First bonding section 311 First bending section 312 First connecting section 313 First tab 31a First adapter 32 Second connecting section 321 Second bending section 322 Third connecting section 323 Second electrode terminal 40 Second tab assembly 41 Second tab 411 Second adapter 42 First insulating component50 First part 51 Inclined surface 511 First edge 512 Second edge 513 Structural part 51a Insulating part 51b Second part 52 Second insulating element 60 Device body 200 Electronic device 1000 First direction X Second direction Y Third direction Z Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0054] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component present. When a component is considered to be "located" to another component, it can be directly mounted on the other component or there may be an intervening component present.

[0055] Unless otherwise stated, the term "multiple" as used herein refers to two or more.

[0056] Unless otherwise defined, the “distance” between two components along a certain direction described herein should be understood as the shortest straight-line distance between the two components along that direction.

[0057] The terms “first”, “second”, etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implying the quantity, specific order, or primary and secondary relationship of the indicated technical features.

[0058] The term "perpendicular" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately perpendicular. For example, in numerical terms, perpendicularity can refer to the angle between two straight lines within the range of 90° ± 10°, the dihedral angle between two planes within the range of 90° ± 10°, or the angle between a straight line and a plane within the range of 90° ± 10°.

[0059] The term "parallel" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately parallel. For example, in numerical terms, parallel can refer to the angle between two straight lines within the range of 180° ± 10°, the dihedral angle between two planes within the range of 180° ± 10°, or the angle between a straight line and a plane within the range of 180° ± 10°.

[0060] It should be noted that when a parameter is greater than, equal to or less than a certain endpoint value, it should be understood that the endpoint value is allowed to have a tolerance of ±10%. For example, if A is greater than B by 10, it should be understood that it includes the case where A is greater than B by 9, as well as the case where A is greater than B by 11.

[0061] It should be understood that the dimensions of layers, regions, films, plates, blocks, pillars, protrusions, and recesses shown in the accompanying drawings are provided for better understanding and easier description, and this application is not limited to the dimensions shown in the drawings. For the sake of clarity, elements unrelated to the description have been omitted from the details of this specification.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0063] In related technologies, with the widespread use of electronic devices, improving the user experience has become an industry goal, and battery performance and lifespan directly impact this experience. When a steel-cased battery is subjected to impact, the tabs located inside the casing are prone to movement, potentially causing damage to the tabs, short circuits, and other issues, thus affecting battery performance and lifespan.

[0064] This application discloses a hard-shell battery, which includes a casing, an electrode assembly, a first electrode terminal, and a first insulating member. The casing is electrically conductive. The electrode assembly is disposed within the casing and includes a first electrode, a second electrode, and a separator disposed between the first and second electrodes. At least a portion of the first electrode terminal is located on one side of the electrode assembly along a first direction. The first electrode terminal includes a first tab group, which includes a plurality of stacked first tabs connected to the first electrode. Along a second direction, the first insulating member is disposed on one side of the first electrode terminal and is in contact with both the first tab group and the casing. The first direction is perpendicular to the second direction, and the second direction is parallel to the thickness direction of the electrode assembly.

[0065] The aforementioned first insulating component is disposed on one side of the first tab assembly along the second direction, which reduces the gap between the first tab assembly and the casing along the second direction. This helps to suppress the shaking of the first tab assembly and reduces the risk of damage to the first tab. The first insulating component also reduces the possibility of the first tab assembly contacting the casing, which helps to reduce the risk of short circuit in the hard-shell battery, thereby improving the safety and reliability of the hard-shell battery.

[0066] Some embodiments of this application will now be described with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0067] Please refer to Figures 1 and 2. In Figure 2, the first electrode terminal 30 is in an unbent state. This application provides a hard-shell battery 100, which includes a casing 10, an electrode assembly 20, and a first electrode terminal 30. The casing 10 is a rigid casing, the electrode assembly 20 is disposed inside the casing 10, and the first electrode terminal 30 is connected to the electrode assembly 20 and partially disposed outside the casing 10.

[0068] In some embodiments, referring to Figures 1 and 3, the housing 10 includes a first wall 11, a second wall 12, a third wall 13, a fourth wall 14, a fifth wall 15, and a sixth wall 16. The first wall 11 and the second wall 12 are arranged opposite each other along a second direction Y, the third wall 13 and the fourth wall 14 are arranged opposite each other along a first direction X, and the fifth wall 15 and the sixth wall 16 are arranged opposite each other along a third direction Z. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0069] In some embodiments, the housing 10 may be formed by welding two parts together, with the joint between the two parts being a weld. For example, the housing 10 may be formed by welding a steel shell with a recess to a cover plate, the cover plate covering the recess of the steel shell to form a space for accommodating the electrode assembly, and the joint between the steel shell and the cover plate being a weld.

[0070] In some embodiments, the housing 10 is electrically conductive. As an example, the housing 10 is made of at least one of conductive metals such as steel, aluminum, or iron.

[0071] In some embodiments, please refer to FIG4, the electrode assembly 20 includes a first electrode 21, a second electrode 22, and an isolation membrane 23 disposed between the first electrode 21 and the second electrode 22, the isolation membrane 23 being used to isolate the first electrode 21 and the second electrode 22.

[0072] In some embodiments, please refer to Figures 2 and 4. The first electrode 21 includes a first current collector 211 and a first active material layer 212 stacked together.

[0073] In some embodiments, referring to FIG4, the second electrode 22 includes a second current collector 221 and a second active material layer 222 stacked together.

[0074] In some embodiments, the first current collector 211 is a cathode current collector, the second current collector 221 is an anode current collector, the first active material layer 212 is a cathode active material layer, and the second active material layer 222 is an anode active material layer.

[0075] In other embodiments, the first current collector 211 is an anode current collector, the second current collector 221 is a cathode current collector, the first active material layer 212 is an anode active material layer, and the second active material layer 222 is a cathode active material layer.

[0076] The cathode current collector can be a metal layer comprising at least one of aluminum, nickel, tantalum, and titanium, such as aluminum foil. The anode current collector can be a metal layer comprising at least one of copper, nickel, tantalum, and titanium, such as copper foil. The cathode active material layer comprises a cathode active material, which can include at least one of lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium iron phosphate, lithium manganese iron phosphate, or lithium manganese oxide. The anode active material layer comprises an anode active material, which can include at least one of graphite, hard carbon, soft carbon, silicon, silicon-oxygen materials, and silicon-carbon materials.

[0077] In some embodiments, the separator 23 is an insulating film material such as a polyethylene film, a polypropylene film, a polyester film, or a polyimide film.

[0078] In some embodiments, the first electrode 21, the second electrode 22, and the separator 23 are stacked to form a stacked structure.

[0079] In some other embodiments, the first electrode 21, the second electrode 22, and the separator 23 are stacked and wound to form a wound structure.

[0080] In some embodiments, referring to Figures 2 and 4, at least a portion of the first electrode terminal 30 is located on one side of the electrode assembly 20 along the first direction X. The first electrode terminal 30 includes a first tab group 31, which includes a plurality of stacked first tabs 31a. The first tabs 31a are connected to the first electrode plate 21, and the polarity of the first tabs 31a is the same as that of the first electrode plate 21.

[0081] In some embodiments, the first tab 31a is connected to the first electrode plate 21 by welding. In other embodiments, the first tab 31a is formed by cutting the first current collector 211.

[0082] In some embodiments, the material of the first tab 31a may be the same as or different from the first electrode 21, and no specific limitation is made here.

[0083] In some embodiments, referring to Figures 2 to 4, the first electrode terminal 30 further includes a first adapter 32, which is connected to the first tab assembly 31. The polarity of the first adapter 32 is the same as the polarity of the first tab 31a. At least a portion of the first adapter 32 is located outside the housing 10, or the first adapter 32 is connected to a conductive structure located partially outside the housing 10, so as to lead the polarity of the first electrode 21 out of the housing 10.

[0084] In some embodiments, the material of the first adapter 32 may be the same as the material of the first tab 31a, or the material of the first adapter 32 may be different from the material of the first tab 31a, without specific limitations here.

[0085] In some other embodiments, a portion of the first tab assembly 31 extends directly outside the housing 10 to draw the polarity of the first electrode 21 out of the housing 10.

[0086] In some embodiments, please refer to FIG2, the second electrode terminal 40 in FIG2 is in an unbent state. The hard-shell battery 100 also includes a second electrode terminal 40, the second electrode terminal 40 includes a second tab group 41, the second tab group 41 includes a plurality of stacked second tabs 411, the second tabs 411 are connected to the second electrode plate 22, and the polarity of the second tabs 411 is the same as that of the second electrode plate 22.

[0087] In some embodiments, the second electrode tab 411 is connected to the second electrode plate 22 by welding. In other embodiments, the second electrode tab 411 is formed by cutting the second current collector 221.

[0088] In some embodiments, the material of the second tab 411 may be the same as or different from the second electrode 22, and no specific limitation is made here.

[0089] In some embodiments, referring to Figures 2 and 4, the second electrode terminal 40 further includes a second adapter 42, which is connected to the second tab assembly 41. The polarity of the second adapter 42 is the same as that of the second tab 411. At least a portion of the second adapter 42 is located outside the housing 10, or the second adapter 42 is connected to a conductive structure located partially outside the housing 10, so as to lead the polarity of the second electrode 22 out of the housing 10.

[0090] In some embodiments, the material of the second adapter 42 may be the same as the material of the second tab 411, or the material of the second adapter 42 may be different from the material of the second tab 411, without specific limitations here.

[0091] In some other embodiments, a portion of the second electrode assembly 41 extends directly outside the housing 10 to bring out the polarity of the second electrode 22 outside the housing 10.

[0092] In some embodiments, referring to FIG2, at least a portion of the second electrode terminal 40 is located on one side of the electrode assembly 20 along the first direction X.

[0093] In some embodiments, referring to Figures 3 and 5, the hard-shell battery 100 further includes a first insulating member 50. Along the second direction Y, the first insulating member 50 is disposed on one side of the first electrode terminal 30, and the first insulating member 50 is in contact with both the first tab assembly 31 and the housing 10. The first direction X is perpendicular to the second direction Y, and the second direction Y is parallel to the thickness direction of the electrode assembly 20.

[0094] Considering factors such as battery impact resistance, cost, and processing, the casing 10 of the hard-shell battery 100 is made of a conductive metal material. Under extreme conditions such as impact, the first tab group 31 and the second tab group 41 may shake, and the first tab 31a is at risk of damage when the first tab group 31 shakes. When the first tab group 31 and the second tab group 41 shake, the conductive casing 10 may come into contact with the first tab group 31 and the second tab group 41, which have different polarities, thus posing a risk of short circuit in the hard-shell battery 100 or the casing 10 becoming charged. The first insulating member 50 is disposed on one side of the first tab group 31 along the second direction Y, which reduces the gap between the first tab group 31 and the housing 10 along the second direction Y. This helps to suppress the shaking of the first tab group 31 and reduce the risk of damage to the first tab 31a. The first insulating member 50 also reduces the possibility of the first tab group 31 contacting the housing 10, which helps to reduce the risk of short circuit of the hard-shell battery 100 and the housing 10 becoming charged, thereby improving the safety and reliability of the hard-shell battery 100.

[0095] In some embodiments, referring to Figures 3 and 5, the first tab assembly 31 includes a first agglomerated section 311, a first bent section 312, and a first connecting section 313 arranged sequentially. The first agglomerated section 311 is connected to the electrode assembly 20, and the first connecting section 313 extends along the second direction Y. Along the second direction Y, the housing 10 includes a first wall 11 and a second wall 12 disposed opposite to each other, and the first insulating member 50 is in contact with both the first tab assembly 31 and the first wall 11. Along the second direction Y, the distance between the first bent section 312 and the first wall 11 is less than the distance between the first bent section 312 and the second wall 12. Along the second direction Y, the projection of the first bent section 312 overlaps with the projection of the first insulating member 50.

[0096] In Figure 3, the first tab assembly 31 is bent. After the first tab assembly 31 is bent to form the first bent segment 312, the distance between the first bent segment 312 and the housing 10 is closer than other parts of the first tab assembly 31, and the risk of the first bent segment 312 contacting the housing 10 is higher. Along the second direction Y, the projection of the first bent segment 312 overlaps with the projection of the first insulating member 50. On the one hand, this helps the first insulating member 50 to abut against the first bent segment 312 when the hard-shell battery 100 is impacted, thereby helping to suppress the shaking of the first tab assembly 31. On the other hand, the first insulating member 50 acts to prevent the first bent segment 312 from contacting the housing 10, which helps to reduce the risk of short circuit caused by the first bent segment 312 contacting the housing 10.

[0097] It should be noted that multiple first tabs 31a are stacked and aggregated, and the aggregated multiple first tabs 31a form a first aggregated segment 311, a first bent segment 312, and a first connecting segment 313 arranged sequentially. Along the extension direction of the aggregated multiple first tabs 31a, the distance between the first aggregated segment 311 and the electrode assembly 20 is less than the distance between the first bent segment 312 and the electrode assembly 20.

[0098] In some embodiments, referring to Figures 3 and 5, the hard-shell battery 100 further includes a second insulating member 60. Along the second direction Y, the second insulating member 60 is disposed on the side of the first electrode terminal 30 opposite to the first insulating member 50. The second insulating member 60 is in contact with both the first tab assembly 31 and the second wall 12.

[0099] The second insulating member 60 is disposed on the side of the first electrode terminal 30 away from the first insulating member 50, and the second insulating member 60 is in contact with both the first tab group 31 and the second wall 12. This further reduces the gap between the first tab group 31 and the housing 10 along the second direction Y, which helps to suppress the shaking of the first tab group 31 and reduce the risk of damage to the first tab 31a. The second insulating member 60 also further reduces the possibility of the first tab group 31 contacting the housing 10, which helps to reduce the risk of short circuit of the hard-shell battery 100 or the housing 10 becoming charged, thereby further improving the safety and reliability of the hard-shell battery 100.

[0100] In some embodiments, referring to Figures 3 and 5, the first adapter 32 in Figure 5 is bent. The first electrode terminal 30 includes the first adapter 32, which includes a second connecting segment 321, a second bent segment 322, and a third connecting segment 323 arranged sequentially. The second connecting segment 321 is connected to the first connecting segment 313. The bending direction of the second bent segment 322 is opposite to that of the first bent segment 312. Along the first direction X, the third connecting segment 323 is located on the side of the first connecting segment 313 facing away from the first agglomeration segment 311. Along the second direction Y, the distance between the second bent segment 322 and the second wall 12 is less than the distance between the second bent segment 322 and the first wall 11. Along the second direction Y, the projection of the second bent segment 322 overlaps with the projection of the second insulating member 60.

[0101] After the first adapter 32 is bent to form the second bent segment 322, the distance between the second bent segment 322 and the housing 10 is closer than other parts of the first adapter 32, increasing the risk of contact between the second bent segment 322 and the housing 10. Along the second direction Y, the projection of the second bent segment 322 overlaps with the projection of the second insulating member 60. This serves two purposes: firstly, it allows the second insulating member 60 to abut against the first bent segment 312 when the hard-shell battery 100 is impacted, thus helping to suppress the shaking of the first tab assembly 31; secondly, the second insulating member 60 prevents the second bent segment 322 from contacting the housing 10, reducing the risk of a short circuit due to contact between the second bent segment 322 and the housing 10.

[0102] In some embodiments, referring to Figures 3 and 5, along the first direction X, the housing 10 includes a third wall 13 and a fourth wall 14 disposed opposite each other. Along the first direction X, the distance between the first electrode terminal 30 and the third wall 13 is less than the distance between the first electrode terminal 30 and the fourth wall 14. Along the first direction X, the distance between the first insulating member 50 and the third wall 13 is L1, satisfying L1 ≥ 0.1 mm. Satisfying L1 ≥ 0.1 mm helps reduce the risk of interference between the first insulating member 50 and the housing 10, facilitating the encapsulation of the housing 10.

[0103] As an example, L1 can be any one of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, or any value of both.

[0104] In some embodiments, referring to Figures 5 to 8, the first electrode 21 has a first region 21a and a second region 21b connected together. Along the first direction X, the first region 21a is closer to the first electrode terminal 30 than the second region 21b, and the thickness of the first active material layer 212 in the first region 21a is less than the thickness of the first active material layer 212 in the second region 21b. The first insulating member 50 includes a first portion 51 and a second portion 52 arranged along the first direction X. Along the second direction Y, the first portion 51 is located between the housing 10 and the electrode assembly 20, and the projection of the first portion 51 is located within the first region 21a. The second portion 52 is located between the housing 10 and the first tab assembly 31.

[0105] The thickness of the first active material layer 212 in the first region 21a is less than that in the second region 21b. This makes it easier for the first region 21a to experience less pressure than the second region 21b during the formation process, resulting in insufficient formation of the SEI film (solid electrolyte interface), which is detrimental to improving the interface performance of the electrode assembly 20. Along the second direction Y, the first portion 51 of the first insulating member 50 is located between the housing 10 and the electrode assembly 20, with its projection within the first region 21a. The second portion 52 is located between the housing 10 and the first tab assembly 31. This arrangement helps the first insulating member 50 suppress the shaking of the first tab assembly 31, reducing the risk of short circuits in the hard-shell battery 100 and the housing 10 becoming charged. It also helps compensate for the thinner thickness of the first region 21a, improving the uniformity of pressure on the electrode assembly 20, thereby enhancing the interface performance of the electrode assembly 20.

[0106] In some embodiments, referring to Figures 5 to 8, along the first direction X, the housing 10 includes a third wall 13 and a fourth wall 14 disposed opposite each other, and the distance between the first electrode terminal 30 and the third wall 13 is less than the distance between the first electrode terminal 30 and the fourth wall 14. The thickness of the first active material layer 212 in the first region 21a gradually decreases along the direction from the fourth wall 14 to the third wall 13, and the thickness of the first portion 51 gradually increases along the direction from the fourth wall 14 to the third wall 13. The first portion 51 is in contact with the electrode assembly 20.

[0107] The electrode assembly 20 has a thinner portion corresponding to the first region 21a, and the thickness varies with the thickness of the active material layer in the first region 21a. The thickness of the first portion 51 gradually increases along the direction from the fourth wall 14 to the third wall 13, which is beneficial for the first portion 51 and the thinner portion of the electrode assembly 20 to adhere together. This helps to compensate for the thickness of the first region 21a, improves the uniformity of pressure on the electrode assembly 20, and improves the interface performance of the electrode assembly 20.

[0108] In some embodiments, as shown in Figures 5 to 8, the first portion 51 has an inclined surface 511 in contact with the first region 21a, and the inclined surface 511 has a slope K that satisfies 0.005≤K≤0.14.

[0109] When K satisfies 0.005≤K≤0.14, it is beneficial for the first part 51 and the thinner part of the electrode assembly 20 to fit together, thereby helping to compensate for the thickness of the first region 21a, improve the uniformity of pressure on the electrode assembly 20, and improve the interface performance of the electrode assembly 20.

[0110] The slope K of inclined plane 511 is calculated as follows:

[0111] The difference between the thickness of the portion of electrode assembly 20 corresponding to the first region 21a and the thickness of the main body of electrode assembly 20 (the portion not in the first region 21a) is M, which is the dimension M shown in Figure 7. The width of the portion of electrode assembly corresponding to the first region 21a is N, which is the dimension N shown in Figure 7. The slope of inclined surface 511 is K = M / N.

[0112] As an example, K can be any one of 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, or 0.14, or any value of both.

[0113] As an example, M can be any one of 50um, 60um, 70um, 80um, 90um, 100um, 110um, 120um, 130um, 140um, 150um, 160um, 170um, 180um, 190um, 200um, 210um, 220um, 230um, 240um, 250um, 260um, 270um, 280um, 290um, 300um, 310um, 320um, 330um, 340um, 350um, 360um, 370um, 380um, 390um, or 400um, or any value of both.

[0114] As an example, N can be any one of 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm or 10mm, or any value of both.

[0115] [Revised according to Rule 26, 29.05.2026] In some embodiments, please refer to FIG8, along the first direction X, the length of the first portion 51 is L2, which satisfies 2.5mm≤L2≤10.5mm.

[0116] [According to Rule 26, amended 29.05.2026] When L2 satisfies 2.5mm≤L2≤10.5mm, on the one hand, the first part 51 will not be too long and will extend beyond the first region 21a along the first direction X, which is beneficial to reducing the space occupied by the first insulating member 50. On the other hand, the first part 51 will not be too short, which is beneficial to improving the comprehensiveness of the first insulating member 50 in compensating for the thickness of the first region 21a, thereby improving the uniformity of the pressure on the electrode assembly 20 and improving the interface performance of the electrode assembly 20.

[0117] [Amended according to Rule 26 29.05.2026] As an example, L2 can be any one of 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm or 10.5mm, or any value of both.

[0118] In some embodiments, please refer to FIG8, the length of the second portion 52 along the first direction X is L3, which satisfies 0.1mm≤L3≤0.3mm.

[0119] When L3 satisfies 0.1mm≤L3≤0.3mm, on the one hand, the second part 52 will not be too long and interfere with the housing 10, which is beneficial to the encapsulation of the housing 10. On the other hand, the second part 52 will not be too short, which is beneficial to the overlap between the projection of the second part 52 along the second direction Y and the projection of the first bending segment 312 along the second direction Y. This is beneficial to the first insulating member 50 and the first bending segment 312 when the hard-shell battery 100 is impacted, which is beneficial to suppress the shaking of the first electrode group 31 and reduce the risk of short circuit caused by the first bending segment 312 contacting the housing 10.

[0120] As an example, L3 can be any one of 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, or 0.3mm, or any value of both.

[0121] In some embodiments, referring to FIG8, along the third direction Z, the first portion 51 has a first edge 512 and a second edge 513 disposed opposite to each other, and along the second direction Y, the projection of the first region 21a on the first insulating member 50 is located between the first edge 512 and the second edge 513.

[0122] Along the second direction Y, the projection of the first region 21a on the first insulating member 50 is located between the first edge 512 and the second edge 513, which is beneficial for the first insulating member 50 to extend beyond the electrode assembly 20 along the third direction Z, and is beneficial for suppressing the warping of the edges of the first electrode 21 and the second electrode 22 in the electrode assembly 20 along the third direction Z.

[0123] [Modified according to Rule 26, 29.05.2026] In some embodiments, referring to FIG9, along the third direction Z, the housing 10 includes a fifth wall 15 and a sixth wall 16 disposed opposite each other. Along the third direction Z, the distance between the fifth wall 15 and the first edge 512 is less than the distance between the fifth wall 15 and the second edge 513. The distance between the first edge 512 and the fifth wall 15 is D1, and the distance between the second edge 513 and the sixth wall 16 is D2, satisfying 0.1mm≤D1≤1.5mm and 0.1mm≤D2≤1.5mm.

[0124] [Revised according to Rule 26, 29.05.2026] When 0.1mm≤D1≤1.5mm and 0.1mm≤D2≤1.5mm are satisfied, on the one hand, the distance between the first part 51 and the fifth wall 15 and the sixth wall 16 will not be too small, which is beneficial to the installation of the electrode assembly 20 and the first insulating member 50 and reduces the space occupied by the first insulating member 50. On the other hand, the first part 51 will not be too short, which is beneficial to allow the first insulating member 50 to extend beyond the electrode assembly 20 along the third direction Z, thereby helping to suppress the warping of the edges of the first electrode 21 and the second electrode 22 in the electrode assembly 20 along the third direction Z.

[0125] In some embodiments, along the second direction Y, the overlapping area of ​​the first portion 51 and the first region 21a occupies 80%-100% of the area of ​​the first region 21a, which is beneficial to improve the comprehensiveness of the first insulating member 50 in compensating for the thickness of the first region 21a, thereby improving the uniformity of the pressure on the electrode assembly 20 and improving the interface performance of the electrode assembly 20.

[0126] As an example, the percentage of the overlapping area of ​​the first region 21a to the area of ​​the first region 21a is S. S can be any one of 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%, or any value of both.

[0127] To verify the impact of the first insulating component 50 on whether the hard-shell battery 100 short-circuits and on its interface performance, the following tests were conducted:

[0128] A battery cycle test was conducted on the hard-case battery 100: The hard-case battery 100 was placed in a 55°C environment and left to stand for 30 minutes, then charged and discharged according to the following steps: Charged at a constant current of 2.5C to 4.2V, then charged at a constant voltage to 0.5C; then charged at a constant current of 0.5C to 4.45V, then charged at a constant voltage to 0.02C; left to stand for 5 minutes, then discharged at a constant current of 1C to 3V, and left to stand for 5 minutes. This constitutes one cycle. The above cycle was repeated 300 times. The hard-case battery 100 was then disassembled, and the electrode assembly 20 was observed for black spots or lithium plating. If black spots or lithium plating were observed, the test failed; otherwise, the test passed.

[0129] Battery drop test: The hard-cased battery 100 is pretreated at 25℃ and left to stand at room temperature for 60 minutes. The resistance and voltage of the hard-cased battery 100 are then measured before the drop test. The hard-cased battery 100 is placed in a fixture and dropped freely from a height of 2m using a drop device in the following sequence: head-tail-head right corner-tail right corner-head left corner-tail left corner (angle: 45±15°), repeated 10 times. After the drop test, the internal resistance of the hard-cased battery 100 is measured. If the internal resistance increases to more than 20Ω, the test is considered failed. After the drop test, voltage monitoring is performed for 96 hours, measured every 24 hours for a total of 4 times. If any voltage drop exceeds 10mV, it is considered an internal short circuit failure, the test is considered failed, and the battery needs to be disassembled to confirm the short circuit point. After the drop test, the hard-cased battery 100 is disassembled, and all first tabs 31a are observed for damage. If one or more first tabs 31a are damaged, the test is considered failed. Additionally, if the weld cracks after the drop test, the test is deemed a failure. If, after the drop test, the first tab 31a is undamaged, the internal resistance does not exceed 20Ω, the voltage of each voltage test is less than or equal to 10mV, and the weld does not crack, the test is passed.

[0130] In the two tests mentioned above, 100 hard-shell batteries 100 were tested in each embodiment or comparative example. Each hard-shell battery 100 was 90mm long, 48mm wide, and 5.1mm thick. The pass rate was calculated as (number of passes / 100) × 100%.

[0131] The following describes the specific implementation of the hard-shell battery 100 in the embodiments and comparative examples.

[0132] Example 1:

[0133] The assembly process of a hard-shell battery 100 is as follows:

[0134] (1) Preparation of the anode electrode: The anode active materials, artificial graphite, conductive carbon black (Super P), and styrene-butadiene rubber (SBR), were mixed in a weight ratio of 96:1.5:2.5. Deionized water was added as a solvent to prepare a slurry with a weight percentage of 70 wt%, and the mixture was stirred evenly. The slurry was uniformly coated on one surface of a copper foil with a thickness of 10 μm for the anode current collector, leaving an empty foil area at the edge of the copper foil. The foil was dried at 110 °C to obtain an anode electrode with a coating thickness of 150 μm on one side, partially coated with an anode active material layer. The above steps were repeated on the other surface of the anode electrode to obtain an anode electrode with a coated area and an empty foil area. An anode tab was welded to the empty foil area at one end of the anode electrode.

[0135] (2) Preparation of cathode electrode: Lithium cobalt oxide (LiCoO2), conductive carbon black (Super P), and polyvinylidene fluoride (PVDF) were mixed in a weight ratio of 97.5:1.0:1.5. N-methylpyrrolidone (NMP) was added as a solvent to prepare a slurry with a solid content of 75 wt%, and the mixture was stirred evenly. The slurry was uniformly coated on one surface of a 12 μm thick aluminum foil cathode current collector, leaving an empty foil area. The foil was then dried at 90 °C to obtain a cathode electrode with a cathode active material layer thickness of 100 μm. The above coating steps were repeated on the other surface of the aluminum foil to obtain a cathode electrode. Cathode tabs were welded to the empty foil area of ​​the cathode electrode.

[0136] (3) Preparation of electrolyte: In a dry argon atmosphere, ethylene carbonate (EC), ethyl methyl carbonate (EMC) and diethyl carbonate (DEC) are first mixed in a mass ratio of EC:EMC:DEC = 30:50:20 to form a basic organic solvent. Then, lithium salt lithium hexafluorophosphate (LiPF6) is added to the basic organic solvent to dissolve and mix evenly to obtain an electrolyte with a lithium salt concentration of 1.15 mol / L.

[0137] (4) Preparation of the separator 23: The separator 23 adopts a three-layer structure, which includes a first adhesive layer, a first substrate layer and a first adhesive layer stacked together. The first substrate layer is made of polyethylene (PE), the first adhesive layer contains a first adhesive, and the first adhesive layer also contains boehmite.

[0138] (5) Electrode assembly 20 fabrication: The cathode electrode, the separator 23, and the anode electrode are stacked to form a stacked structure. Multiple cathode tabs are stacked and aggregated to form a cathode tab assembly, and the cathode tab assembly is bent along the thickness direction of the electrode assembly 20. Multiple anode tabs are stacked and aggregated to form an anode tab assembly, and the anode tab assembly is bent along the thickness direction of the electrode assembly 20.

[0139] (6) Preparation of shell 10: A steel shell with a concave part and a cover are formed by stamping. A protruding structural part 51a is formed on the inner sidewall of the steel shell along the thickness direction. An insulating part 51b made of insulating resin is coated on the structural part 51a, so that the structural part 51a and the insulating part 51b form a first insulating member 50.

[0140] (7) Assembly of electrode assembly 20: Place the electrode assembly 20 inside the steel shell assembly fixture, and position the first insulating member 50 on the side of the cathode tab assembly in the thickness direction of the electrode assembly 20, so that the first insulating member 50 is in contact with the cathode tab assembly. Then, cover the steel shell with the cover, and the steel shell and the cover are connected by welding.

[0141] (8) Liquid injection and encapsulation: Electrolyte is injected into the casing 10 through the liquid injection hole damaged in the cover. After encapsulation, standing, formation and other processes, the hard-shell battery 100 is obtained.

[0142] Comparative Example 1: The difference from the embodiment is that the first insulating element 50 is not provided in Comparative Example 1.

[0143] Examples 2-29: The only difference from Example 1 is the parameters shown in Table 1; everything else remains the same.

[0144] The main parameter controls and test results for each embodiment and comparative example are shown in Table 1:

[0145] Table 1

[0146] As shown in Table 1 above, compared to Comparative Example 1, the inclusion of a first insulating member 50 in Examples 1-29, located on one side of the first tab group 31 along the second direction Y, helps reduce the risk of damage to the first tab 31a, reduces the risk of short circuit in the hard-shell battery 100, and improves the pass rate of battery cycle testing and battery drop testing. This enhances the safety and reliability of the hard-shell battery 100.

[0147] As shown in Table 1 above, compared with Example 2, Example 1 and Example 3 satisfy L1≥0.1mm, so that the distance between the first insulating member 50 and the third wall 13 along the first direction X will not be too close. This is beneficial to reducing the risk of interference at the weld between the first insulating member 50 and the shell 10, and to reducing the risk of cracking at the weld, thereby improving the battery drop pass rate.

[0148] As shown in Table 1 above, compared with Example 4, Example 1 and Examples 5-9 satisfy L2≥2.5mm, which is beneficial to improve the overall thickness of the first insulating member 50 in the first region 21a, thereby improving the uniformity of the pressure on the electrode assembly 20, improving the interface performance of the electrode assembly 20, and improving the battery cycle pass rate.

[0149] As shown in Table 1 above, compared with Embodiments 10 and 15, Embodiments 1 and 11-14 satisfy 0.1mm≤L3≤0.3mm. On the one hand, this prevents the second part 52 from being too long, which helps reduce the risk of interference between the second part 52 and the shell 10, and helps reduce the risk of cracking at the weld seal, thereby improving the battery drop pass rate. On the other hand, it helps to make the projection of the second part 52 along the second direction Y overlap with the projection of the first bending segment 312 along the second direction Y, which helps to make the first insulating member 50 abut against the first bending segment 312 when the hard-shell battery 100 is impacted, which helps to suppress the shaking of the first tab group 31 and reduce the risk of short circuit caused by the first bending segment 312 contacting the shell 10.

[0150] As shown in Table 1 above, compared with Embodiments 16 and 21, Embodiments 1 and 17-20 satisfy 0.1mm≤D1≤1.5mm and 0.1mm≤D2≤1.5mm. On the one hand, this prevents the distance between the first part 51 and the fifth wall 15 and the sixth wall 16 from being too small, which is beneficial for the installation of the electrode assembly 20 and the first insulating member 50, reduces the gap of interference between the first part 51 and the shell, increases the welding area of ​​the shell 10, and reduces the risk of weld cracking, thereby improving the battery drop test pass rate. On the other hand, it allows the first insulating member 50 to extend beyond the electrode assembly 20 along the third direction Z, which helps to suppress the warping of the edges of the first electrode 21 and the second electrode 22 in the electrode assembly 20 along the third direction Z, and improves the battery cycle test pass rate.

[0151] As shown in Table 1 above, compared with Examples 22 and 29, Examples 1 and Examples 21-28 satisfy 0.005≤K≤0.14, which is beneficial for the first part 51 and the thinner part of the electrode assembly 20 to fit together, thereby helping to compensate for the thickness of the first region 21a, improve the uniformity of pressure on the electrode assembly 20, improve the interface performance of the electrode assembly 20, and improve the pass rate of battery cycle test.

[0152] In some embodiments, please refer to FIG5, the first insulating member 50 includes a structural portion 51a integrally disposed with the housing 10 and an insulating portion 51b disposed on the surface of the structural portion 51a.

[0153] The structure 51a, which is integrally formed with the housing 10, is beneficial for the shaping of the first insulating member 50, and also helps to reduce the risk of the first insulating member 50 moving around inside the housing 10 when the hard-shell battery 100 is impacted. It also helps the first insulating member 50 to restrict the movement of the electrode assembly 20, reduces the risk of cracking at the weld of the housing 10, and improves the reliability of the hard-shell battery 100.

[0154] In some embodiments, the insulating portion 51b may be an insulating material such as ceramic or resin. The insulating portion 51b may be disposed on the structural portion 51a by means of surface coating, spraying, or other methods, so that the first insulating member 50 can perform an insulating function.

[0155] In some other embodiments, the first insulating member 50 and the housing 10 are not integrally formed. The material of the first insulating member 50 can be plastic, silicone, etc., or the first insulating member 50 can be a metal structure with an insulating material on its surface.

[0156] In embodiments where the first insulating member 50 and the housing 10 are not integrally formed, the first insulating member 50 is connected to the housing 10 by means of adhesive, hot melting or welding.

[0157] In some embodiments, referring to FIG2, the second electrode terminal 40 is located on one side of the electrode assembly 20 along the first direction X. The second electrode terminal 40 includes a second tab group 41, which includes a plurality of stacked second tabs 411. The second tabs 411 are connected to the second electrode plate 22. Along the second direction Y, a first insulating member 50 is disposed on one side of the second electrode terminal 40, and the first insulating member 50 is in contact with both the second tab group 41 and the housing 10.

[0158] Along the second direction Y, the first insulating member 50 is disposed on one side of the second electrode terminal 40. The first insulating member 50 is in contact with both the second tab assembly 41 and the housing 10, reducing the gap between the second tab assembly 41 and the housing 10 along the second direction Y. This helps to suppress the shaking of the second tab assembly 41 and reduces the risk of damage to the second tab 41. The first insulating member 50 also reduces the possibility of the second tab assembly 41 contacting the housing 10, which helps to reduce the risk of short circuit of the hard-case battery 100 and the housing 10 becoming charged, thereby improving the safety and reliability of the hard-case battery 100.

[0159] The implementation of the second electrode terminal 40 can refer to the embodiments described above regarding the first electrode terminal 30. The implementation between the first insulating member 50 and the second electrode terminal 40 can refer to the embodiments described above regarding the first insulating member 50 and the first electrode terminal 30. In embodiments where a second insulating member 60 is provided, the implementation of the second insulating member 60 can refer to the embodiments described above regarding the first insulating member 50. The implementation between the second insulating member 60 and the second electrode terminal 40 can refer to the embodiments described above regarding the second insulating member 60 and the first electrode terminal 30. The embodiments and beneficial effects of the second electrode terminal 40 will not be repeated here.

[0160] In some other embodiments, referring to FIG10, the projection of the first insulating member 50 is separate from the second electrode terminal 40 along the second direction Y.

[0161] In some embodiments, the housing 10 is a stainless steel housing, and the first tab 31a is a cathode tab, which helps to provide insulation between the housing 10 and the electrode assembly 20, reducing the risk of short circuit.

[0162] In some embodiments, the housing 10 is an aluminum housing and the first tab 31a is an anode tab, which helps to provide insulation between the housing 10 and the electrode assembly 20 and reduce the risk of short circuit.

[0163] Referring to Figure 11, an embodiment of this application also provides an electronic device 1000, which includes the hard-shell battery 100 from any of the above embodiments. Since the electronic device 1000 employs the technical solution of the hard-shell battery 100 from any of the above embodiments, it at least possesses the beneficial effects brought about by the technical solution of the hard-shell battery 100 from any of the above embodiments, which will not be elaborated further here.

[0164] In some embodiments, referring to FIG11, the electronic device 1000 further includes a device body 200, on which a hard-shell battery 100 is mounted.

[0165] In some embodiments, the electronic device 1000 may be a mobile phone, computer, e-reader, game console, wearable electronic device, etc., which will not be listed here.

[0166] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the substantive scope of this application fall within the scope of this application.

Claims

1. A hard-shell battery, characterized in that, include: A housing, wherein the housing is electrically conductive; An electrode assembly is disposed within the housing, the electrode assembly comprising a first electrode, a second electrode, and a separating membrane disposed between the first electrode and the second electrode; A first electrode terminal, at least a portion of which is located on one side of the electrode assembly along a first direction, the first electrode terminal including a first tab group, the first tab group including a plurality of stacked first tabs, the first tabs being connected to the first electrode plate; A first insulating member is disposed on one side of the first electrode terminal along the second direction, and the first insulating member is in contact with both the first electrode tab assembly and the housing. The first direction is perpendicular to the second direction, and the second direction is parallel to the thickness direction of the electrode assembly.

2. The hard-shell battery according to claim 1, characterized in that, The first electrode assembly includes a first aggregation section, a first bending section, and a first connecting section arranged sequentially. The first aggregation section is connected to the electrode assembly, and the first connecting section extends along the second direction. Along the second direction, the housing includes a first wall and a second wall disposed opposite to each other, the first insulating member is in contact with both the first tab assembly and the first wall, and the distance between the first bent section and the first wall is less than the distance between the first bent section and the second wall; Along the second direction, the projection of the first bent segment overlaps with the projection of the first insulating element.

3. The hard-shell battery according to claim 2, characterized in that, The hard-shell battery also includes a second insulating member. Along the second direction, the second insulating member is disposed on the side of the first electrode terminal opposite to the first insulating member, and the second insulating member is in contact with both the first tab assembly and the second wall.

4. The hard-shell battery according to claim 3, characterized in that, The first electrode terminal further includes a first adapter, which includes a second connecting segment, a second bending segment and a third connecting segment arranged sequentially. The second connecting segment is connected to the first connecting segment, and the bending direction of the second bending segment is opposite to that of the first bending segment. Along the first direction, the third connecting segment is located on the side of the first connecting segment away from the first converging segment. Along the second direction, the distance between the second bent segment and the second wall is less than the distance between the second bent segment and the first wall; Along the second direction, the projection of the second bent segment overlaps with the projection of the second insulating element.

5. The hard-cased battery according to any one of claims 2 to 4, characterized in that, Along the first direction, the housing includes a third wall and a fourth wall disposed opposite to each other, and the distance between the first electrode terminal and the third wall is less than the distance between the first electrode terminal and the fourth wall; Along the first direction, the distance between the first insulating element and the third wall is L1, which satisfies L1≥0.1mm.

6. The hard-shell battery according to claim 1, characterized in that, The first electrode includes a first current collector and a first active material layer stacked together. The first electrode has a first region and a second region connected together. Along the first direction, the first region is closer to the first electrode terminal than the second region, and the thickness of the first active material layer in the first region is less than the thickness of the first active material layer in the second region. The first insulating member includes a first portion and a second portion arranged along the first direction. Along the second direction, the first portion is located between the housing and the electrode assembly, and the projection of the first portion is located within the first region. The second portion is located between the housing and the first tab assembly.

7. The hard-shell battery according to claim 6, characterized in that, Along the first direction, the housing includes a third wall and a fourth wall disposed opposite to each other, and the distance between the first electrode terminal and the third wall is less than the distance between the first electrode terminal and the fourth wall; The thickness of the first active material layer in the first region gradually decreases along the direction from the fourth wall to the third wall, and the thickness of the first part gradually increases along the direction from the fourth wall to the third wall. The first part is in contact with the electrode assembly.

8. The hard-shell battery according to claim 7, characterized in that, The first portion has an inclined surface that contacts the electrode assembly, the inclined surface having a slope K that satisfies 0.005≤K≤0.

14.

9. [Amended according to Rule 26, 29.05.2026] The hard-shell battery according to claim 6 is characterized in that, Along the first direction, the length of the first portion is L2, which satisfies 2.5mm≤L2≤10.5mm; And / or, the length of the second part is L3, satisfying 0.1mm≤L3≤0.3mm.

10. The hard-cased battery according to any one of claims 6 to 9, characterized in that, Along a third direction, the first portion has a first edge and a second edge that are disposed opposite to each other, and the first direction, the second direction and the third direction are perpendicular to each other; Along the second direction, the projection of the first region onto the first insulating member lies between the first edge and the second edge.

11. [Amended according to Rule 26, 29.05.2026] The hard-shell battery according to claim 10 is characterized in that, Along the third direction, the housing includes a fifth wall and a sixth wall disposed opposite to each other, the distance between the fifth wall and the first edge being less than the distance between the fifth wall and the second edge; The distance between the first edge and the fifth wall is D1, and the distance between the second edge and the sixth wall is D2, satisfying 0.1mm≤D1≤1.5mm and 0.1mm≤D2≤1.5mm.

12. The hard-cased battery according to any one of claims 6 to 9, characterized in that, Along the second direction, the overlapping area of ​​the first portion and the first region occupies 80%-100% of the area of ​​the first region.

13. The hard-cased battery according to any one of claims 1 to 12, characterized in that, The first insulating member includes a structural portion integrally formed with the housing and an insulating portion disposed on the surface of the structural portion.

14. The hard-shell battery according to any one of claims 1 to 13, characterized in that, The hard-shell battery also includes a second electrode terminal, which is located on one side of the electrode assembly along the first direction. The second electrode terminal includes a second tab group, which includes a plurality of stacked second tabs. The second tabs are connected to the second electrode sheet. Along the second direction, the first insulating member is disposed on one side of the second electrode terminal, and the first insulating member is in contact with both the second electrode assembly and the housing.

15. The hard-shell battery according to claim 1, characterized in that, The housing is a stainless steel housing, and the first electrode tab is a cathode electrode tab; Alternatively, the housing may be an aluminum housing, and the first electrode tab may be an anode electrode tab.

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

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