Battery and terminal device

Abstract

The invention discloses a battery and a terminal device. The battery comprises two battery cells and a circuit board assembly, the battery cell comprises a main body part, a packaging part and a tab, the packaging part comprises a top sealing part and a side sealing part. The top sealing part comprises a bending part and a root part. The top wall comprises a first top surface positioned between the root part and the first wall, the bent part is bent towards the first top surface, and the tab extends out of the bent part. The side sealing part is bent in the direction towards the first wall, the side sealing part comprises a side sealing extending part protruding out of the top wall in the third direction, and the side sealing extending part is connected with the bent part. The circuit board assembly comprises a substrate, and the substrate comprises a first part and two second parts. The first parts are located on the sides, close to the first wall, of the two adjacent side seal extending parts, and the first parts and the first top faces are oppositely arranged in the third direction. The two second parts are respectively connected to the two ends of the first part, and each second part is connected with the corresponding tab. In the battery, the first part is used for avoiding the two side sealing extension parts, so that the volume of the main body part is increased, and the capacity of the battery is improved.

Description

Technical Field

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

[0002] Dual cells can increase charging speed and reduce temperature rise, and are widely used in high-end mobile phones. With the continuous improvement of overall machine performance and the application of AI, the power consumption of mobile phones continues to increase, and the demand for increasing the capacity of dual cells is more urgent. The capacity loss of existing dual cells is as high as 6% or more compared to single cells. Existing cells are usually folding top sealed cells. A single folding top sealed battery has two side seals protruding from the top wall. When using the dual cell solution, the protruding parts of the two adjacent side seals will interfere with the protective plate, and the protective plate cannot be effectively placed. Summary of the invention

[0003] In view of the above situation, the present application provides a battery to solve the above problems.

[0004] An embodiment of the present application provides a battery, the battery comprising two cells and a circuit board assembly. The thickness direction of the two cells is a first direction. When viewed along the first direction, the two cells are arranged along a second direction. The cell comprises a main body, a packaging part and a pole ear. The main body comprises a top wall, a first wall and a second wall connected to the top wall along a first direction, and two side walls connected to the top wall along a second direction. The packaging part comprises a top sealing part connected to the top wall and a side sealing part connected to the side wall. The top sealing part comprises a bending part and a root connected between the bending part and the top wall. The top wall comprises a first top surface between the root and the first wall, the bending part is bent toward the first top surface, and the pole ear extends from the bending part. The side sealing part is bent in a direction toward the first wall, and the side sealing part comprises a side sealing extension part protruding from the top wall along a third direction, and the side sealing extension part connects the bending part. The first direction, the second direction and the third direction are perpendicular to each other. The circuit board assembly comprises a substrate, and the thickness direction of the substrate intersects with the first direction. The substrate comprises a first part and two second parts. Along the first direction, the first portion is located on one side of two adjacent side seal extensions close to the first wall, and the first portion is arranged opposite to the first top surface along the third direction. Along the second direction, the two second portions are respectively connected to the two ends of the first portion, and each second portion is arranged opposite to the bending portion of a battery cell along the third direction and connected to the corresponding pole ear.

[0005] In the above-mentioned battery, the substrate includes a first part and two second parts. Along the first direction, the first part is located on the side of the two adjacent side seal extensions close to the first wall, and the first part and the first top surface are arranged opposite to each other along the third direction to avoid the two side seal extensions. Along the second direction, the two second parts are respectively connected to the two ends of the first part, and each second part is arranged opposite to the bending part of a battery cell along the third direction and connected to the corresponding pole ear. The substrate and the side seal extensions share the space in the third direction on the top wall, which can reduce the space occupied by the substrate in the third direction, which is conducive to increasing the volume of the main body to increase the capacity of the battery.

[0006] In some embodiments of the present application, the bending portion includes a first bending section and a second bending section connected to both ends of the first bending section along the second direction. The first bending section and the second section are arranged opposite to each other along the third direction, and the second bending section extends from the first bending section along the third direction in a direction away from the top wall. The second bending section is connected between the first bending section and the side seal extension portion. Along the first direction, the first portion is arranged opposite to two adjacent second bending sections. Along the first direction, the spacing between the first bending section and the first wall is D1, and the spacing between the two adjacent side seal extension portions and the first wall is D2, D1<D2, 0.15mm≤D2-D1≤0.25mm, so as to reduce the risk of interference between the side seal extension portion and the first portion and improve the packaging strength of the side seal extension portion.

[0007] In some embodiments of the present application, along the first direction, the width of the first portion is W1, 1mm≤W1≤4mm, D2≥W1, 1.5mm≤D2≤4.5mm, which is conducive to improving the structural strength and flow capacity of the first portion, reducing the temperature rise of the first portion during the use of the substrate, and improving the space utilization rate of the first portion on the top wall. Along the second direction, the length of the first portion is L1, 3mm≤L1≤12mm, so as to reduce the risk of interference between the second portion and the convex angle structure and facilitate increasing the layout area of ​​the second portion.

[0008] In some embodiments of the present application, a first notch is provided on a side of the side seal extension portion close to the first wall, and part of the first portion is located in the first notch to reduce the risk of interference between the side seal extension portion and the first portion.

[0009] In some embodiments of the present application, the first notch has a first edge and a second edge, the first edge extends along the third direction and is arranged opposite to the first portion along the first direction, and the second edge extends along the first direction and is arranged opposite to the first portion along the third direction. The length of the first edge is L2, 1mm≤L2≤5mm, to reduce the risk of interference between the second edge and the first portion and to improve the packaging strength of the side seal extension. The length of the second edge is L3, 0.5mm≤L3≤3.5mm, to reduce the risk of interference between the first edge and the first portion and to improve the packaging strength of the side seal extension.

[0010] In some embodiments of the present application, along the first direction, the distance between the first edge and the side edge of the side seal extension away from the first wall is D3, 1.5mm≤D3≤4.5mm, so as to reduce the risk of interference between the first edge and the first part and improve the packaging strength of the side seal extension.

[0011] In some embodiments of the present application, the circuit board assembly includes a first electronic component, and the first electronic component is disposed on the surface of the second portion close to the bending portion. The bending portion includes a first bending section and a second bending section connected to both ends of the first bending section along the second direction. The first bending section and the second portion are arranged opposite to each other along a third direction, and the second bending section extends from the first bending section along the third direction in a direction away from the top wall. The second bending section is connected between the first bending section and the side seal extension portion, and along the first direction, the first portion is arranged opposite to the two adjacent second bending sections. The first electronic component is disposed on the surface of the second portion close to the bending section to increase the distance between the substrate and the top wall in the third direction, so that the substrate avoids the larger volume of the second bending section, thereby reducing the risk of interference between the second bending section and the substrate.

[0012] In some embodiments of the present application, the bending portion includes a first side away from the root, and the first side is provided with a second notch. Along the second direction, the second notch is close to two adjacent side seal extensions. The second notch has a third edge and a fourth edge, the third edge extends along the first direction and is arranged opposite to the first portion along the third direction, and when viewed along the first direction, the fourth edge extends from the third edge in a direction away from the top wall. Along the first direction, the first portion is arranged opposite to the two adjacent fourth edges. By providing the second notch, the space occupied by the second bending segment in the first direction is reduced, thereby reducing the risk of interference between the second bending segment and the substrate.

[0013] In some embodiments of the present application, the top wall includes a second top surface between the root and the second wall. The battery includes a first insulating member, and the first insulating member includes a first insulating portion, a second insulating portion, and a third insulating portion. Along the third direction, the first insulating portion is arranged on the side of the two adjacent side seal extensions away from the top wall, and the second insulating portion and the third insulating portion are connected to both sides of the first insulating portion along the first direction. Observed along the third direction, the first insulating portion covers the portion of the packaging portion between the two second portions. Observed along the first direction, the second insulating portion covers the gap between the two first top surfaces and the portion of the packaging portion between the two second portions, and the third insulating portion covers the gap between the two second top surfaces and the portion of the packaging portion between the two second portions. The first insulating member can improve the insulation stability between the portion of the packaging portion between the two second portions and other structural members. The battery includes an injection molded part, the injection molded part connects the first insulating member and the region where the top wall is separated from the first insulating member, and the injection molded part covers the top seal, the pole ear and the substrate. The first insulating member can reduce the risk of the injection molding material penetrating into the gap between the two battery cells during the injection molding process.

[0014] In some embodiments of the present application, the thickness direction of the substrate is parallel to the third direction. The second part includes a first surface, a second surface, a third surface and a fourth surface. The first surface and the second surface are arranged relative to each other along the third direction, and the first surface is close to the top wall, and the second surface is far from the top wall. The third surface and the fourth surface are arranged relative to each other along the first direction, and the third surface is close to the first wall, and the fourth surface is close to the second wall. The circuit board assembly includes a first connector, the first connector is connected to the second part, the first connector is connected to the pole ear and forms a joint, and the joint is located on the third surface. The joint shares the space in the third direction with the substrate, which is conducive to improving the space utilization of the circuit board assembly 20 on the top wall.

[0015] In some embodiments of the present application, the third surface includes a first body surface, a first concave surface and a first connecting surface. Along the second direction, the first body surface overlaps with the first part, and the first concave surface is located on the side of the first body surface away from the first part. Along the first direction, the spacing between the first body surface and the first wall is D5, and the spacing between the first concave surface and the first wall is D6, D5<D6, and 0.2mm≤D6-D5≤0.8mm. The first connecting surface is connected between the first body surface and the first concave surface. Along the first direction, the bonding portion is located on the first concave surface, and along the second direction, the bonding portion overlaps with the first connecting surface. The bonding portion shares the space in the first direction and the second direction with the substrate, which is conducive to improving the space utilization rate of the circuit board assembly on the top wall. By limiting 0.2mm≤D6-D5≤0.8mm, the bonding portion can utilize the accommodation space formed by the first concave surface and the first connecting surface, and reduce the impact on the layout area of ​​the second part.

[0016] In some embodiments of the present application, the first connecting member includes a first section, a second section and a third section. The first section is connected to the first surface, the third section and the third surface are spaced apart along the first direction, and the second section is bent and connected between the first section and the third section. The pole ear includes a first extension section, a second extension section, a third extension section and a fourth extension section connected in sequence. The first extension section extends from the bending portion, the second extension section is located along the first direction on the side of the third section away from the third surface, the third extension section is located along the third direction on the side of the third section away from the first top surface, and the fourth extension section is located along the first direction between the third section and the third surface and connects the third section. The fourth extension section is connected to the third section to form a joint portion, which is conducive to improving the stability of the connection between the first connecting member and the pole ear.

[0017] In some embodiments of the present application, the first connector includes a first section, a second section, a third section, a fourth section and a fifth section. The first section is connected to the first surface, the third section is spaced apart from the third surface along the first direction, the second section is bent and connected between the first section and the third section, the fifth section is located on the side of the third section away from the third surface along the first direction, and the fourth section is bent and connected between the third section and the fifth section. The tab includes a first extension section, a second extension section, a third extension section and a fourth extension section connected in sequence. The first extension section extends from the bending portion, the second extension section is located on the side of the fifth section away from the third section along the first direction and connected to the fifth section, the third extension section is located on the side of the fourth section away from the first top surface along the third direction, and the fourth extension section is located between the third section and the third surface along the first direction and connected to the third section. The fourth extension section is connected to the third section and the second extension section is connected to the fifth section to form a joint portion, which is conducive to improving the stability of the connection between the first connector and the tab.

[0018] In some embodiments of the present application, the fourth section includes a first sub-section and a second sub-section spaced apart along the second direction, and a gap penetrating the first connecting member is provided between the first sub-section and the second sub-section to facilitate bending of the fourth section.

[0019] In some embodiments of the present application, when viewed along the third direction, the fourth surface is provided with a third notch, and the injection molded part fills the third notch so that the injection molded material can penetrate into the area where the top wall is separated from the first insulating part during the injection molding process.

[0020] An embodiment of the present application further provides a terminal device, which includes any one of the batteries in the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a battery in one embodiment of the present application.

[0022] Figure 2 It is a structural schematic diagram of the connection between a battery cell and a circuit board assembly in one embodiment of the present application.

[0023] Figure 3 It is a schematic structural diagram of a battery cell and a circuit board assembly separated in one embodiment of the present application.

[0024] Figure 4 yes Figure 2 Partial cross-sectional view along section line IV-IV.

[0025] Figure 5 It is a schematic structural diagram of a first insulating member and a first top surface of a battery in one embodiment of the present application.

[0026] Figure 6 It is a schematic structural diagram of a first insulating member and a second top surface of a battery in one embodiment of the present application.

[0027] Figure 7 yes Figure 5 Partial cross-sectional view along section line VII-VII.

[0028] Figure 8 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0029] Fig. 9 yes Figure 8 A partial enlarged view of area IX.

[0030] Fig.10 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0031] Fig.11 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0032] Fig.12 yes Fig.11 Partial sectional view along section line XII-XII.

[0033] Fig.13 It is a schematic structural diagram of a first connecting member of a battery in an embodiment of the present application.

[0034] Fig.14 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0035] Fig.15 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0036] Fig.16 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0037] Fig.17 yes Fig.16 Partial cross-sectional view along section line XVII-XVII.

[0038] Fig.18 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0039] Fig.19 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0040] Fig. 20 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0041] Fig.21 yes Fig. 20 Partial sectional view along section line XXI-XXI.

[0042] Fig. 22It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0043] Fig.23 It is a schematic diagram of the disassembled structure of a battery in one embodiment of the present application.

[0044] Fig.24 It is a schematic diagram of the structure of a terminal device in another embodiment of the present application.

[0045] Main component symbols Battery 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I, 100J, 100K, 100L Terminal devices 200A, 200B Battery 10 Main body 11 Top wall 111 First top surface 111A Second top surface 111B First Wall 112 Second Wall 113 Side wall 114 Packaging unit 12 Top seal part 121 Bending portion 121A The first bending section 1211 The second bending section 1212 The second gap 1213 The third edge 1214 Fourth Edge 1215 Root 121B First side 121C Side sealing part 122 Side seal extension 122A First Gap 1221 First Edge 1222 Second Edge 1223 Side seal body 122B Tab 13 The first extension section 131 The second extension section 132 The third extension section 133 Fourth extension section 134 Circuit board assembly 20 Substrate 21 Part 1211 Part 2212 First surface 212A Second surface 212B The third surface 212C First ontology side 2121 First concave surface 2122 First connection surface 2123 Fourth surface 212D The third gap 2124 First connecting member 22 Joint 22A First paragraph 221 2nd paragraph 222 Section 3 223 Section 4 224 First subsection 224A Second subsection 224B Gap 224C Section 5 225 Flexible circuit board 23 The first insulating member 31 First insulating portion 311 The second insulating portion 312 The third insulating portion 313 Injection molded parts 40 Recess 41 First direction X Second direction Y The third direction Z The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0047] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centrally arranged element at the same time. When an element is considered to be "set" on another element, it may be directly set on the other element or there may be a centrally arranged element at the same time. It should be understood that, considering the factors of actual processing tolerances, in the technical solution of the present application, when two elements are set parallel / vertically and in the same direction, there may be a certain angle between the two elements, and the angle between the two elements is allowed to have a tolerance of 0-±10%.

[0048] When a value is considered to be "equal" to another value, it means that the two are equal within the set deviation, and the set deviation range is within 10%. In other words, when at least one of the two values ​​fluctuates within the set deviation range, even if their values ​​are not equal, they are still judged to be roughly equal. When a value is considered to be in a "1:1" ratio with another value, it means that the two are equal within the set deviation, and the set deviation range is within 10%. In other words, when at least one of the two values ​​fluctuates within the set deviation range, even if their values ​​are not equal, they are still judged to be equal in ratio.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items. The term "overlap" used herein refers to the overlap of the projections of two parts or the overlap of the projections of two parts.

[0050] One embodiment of the present application provides a battery, the battery comprising two cells and a circuit board assembly. The thickness direction of the two cells is a first direction. When viewed along the first direction, the two cells are arranged along a second direction. The cell comprises a main body, a packaging part and a tab. The main body comprises a top wall, a first wall and a second wall connected to the top wall along a first direction, and two side walls connected to the top wall along a second direction. The packaging part comprises a top sealing part connected to the top wall and a side sealing part connected to the side wall. The top sealing part comprises a bending part and a root connected between the bending part and the top wall. The top wall comprises a first top surface between the root and the first wall, the bending part is bent toward the first top surface, and the tab extends from the bending part. The side sealing part is bent in a direction toward the first wall, and the side sealing part comprises a side sealing extension part protruding from the top wall along a third direction, and the side sealing extension part connects the bending part. The first direction, the second direction and the third direction are perpendicular to each other. The circuit board assembly comprises a substrate, and the thickness direction of the substrate intersects with the first direction. The substrate comprises a first part and two second parts. Along the first direction, the first portion is located on one side of two adjacent side seal extensions close to the first wall, and the first portion is arranged opposite to the first top surface along the third direction. Along the second direction, the two second portions are respectively connected to the two ends of the first portion, and each second portion is arranged opposite to the bending portion of a battery cell along the third direction and connected to the corresponding pole ear.

[0051] In the above-mentioned battery, the substrate includes a first part and two second parts. Along the first direction, the first part is located on the side of the two adjacent side seal extensions close to the first wall, and the first part and the first top surface are arranged opposite to each other along the third direction to avoid the two side seal extensions. Along the second direction, the two second parts are respectively connected to the two ends of the first part, and each second part is arranged opposite to the bending part of a battery cell along the third direction and connected to the corresponding pole ear. The substrate and the side seal extensions share the space in the third direction, which can reduce the space occupied by the substrate in the third direction, which is conducive to increasing the volume of the main body to increase the capacity of the battery.

[0052] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0053] Example 1 Please also read Figure 1 and Figure 2 One embodiment of the present application provides a battery 100A. The battery 100A may be, but is not limited to, a secondary battery. A secondary battery refers to a battery that can be continuously used by activating active materials by charging after the battery is discharged.

[0054] The battery 100A includes two battery cells 10 and a circuit board assembly 20. The thickness direction of the two battery cells 10 is a first direction X. When viewed along the first direction X, the two battery cells 10 are arranged along a second direction Y, and the circuit board assembly 20 is disposed on one side of the two battery cells 10 along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other, the second direction Y is the width direction of the battery cell 10, and the third direction Z is the length direction of the battery cell 10.

[0055] Please also read Figure 2 and Figure 3 The battery cell 10 includes a main body 11, a packaging part 12 and a tab 13. The main body 11 and the packaging part 12 are made of a packaging film by punching, folding and heat sealing. The main body 11 is the part where the packaging film is provided with a punching position, and the packaging part 12 is the part where the packaging film overlaps and is joined.

[0056] The main body 11 includes a top wall 111, a first wall 112, a second wall 113 and two side walls 114. The top wall 111 is disposed adjacent to the circuit board assembly 20. The first wall 112 and the second wall 113 are disposed opposite to each other along a first direction X and connected to the top wall 111, and the two side walls 114 are disposed opposite to each other along a second direction Y and connected to the top wall 111.

[0057] The packaging portion 12 includes a top sealing portion 121 and two side sealing portions 122 . The top sealing portion 121 is connected to the top wall 111 , and each side sealing portion 122 is connected to one side wall 114 .

[0058] The top seal portion 121 includes a bending portion 121A and a root portion 121B connected between the bending portion 121A and the top wall 111. The top wall 111 includes a first top surface 111A located between the root portion 121B and the first wall 112. The bending portion 121A is bent toward the first top surface 111A to reduce the space occupied by the top seal portion 121 in the third direction Z. Specifically, the bending portion 121A includes a first bending section 1211 and a second bending section 1212 connected to both ends of the first bending section 1211 along the second direction Y. The first bending section 1211 is arranged opposite to the first top surface 111A along the third direction Z, and the second bending section 1212 extends from the first bending section 1211 along the third direction Z in a direction away from the top wall 111.

[0059] The tab 13 extends from the bent portion 121A to facilitate electrical connection with the circuit board assembly 20. Specifically, the tab 13 extends from the side of the first bent section 1211 away from the root 121B.

[0060] The side seal portion 122 is bent in a direction toward the first wall 112, and includes a side seal extension portion 122A protruding from the top wall 111 along the third direction Z, and the side seal extension portion 122A is connected to the bent portion 121A. Specifically, the second bent section 1212 is connected between the first bent section 1211 and the side seal extension portion 122A, and the second bent section 1212 is bent relative to the first bent section 1211 and forms a convex angle structure with the side seal extension portion 122A.

[0061] Please continue reading Figure 2 and Figure 3 The circuit board assembly 20 includes a substrate 21, and the thickness direction of the substrate 21 intersects with the first direction X to reduce the space occupied by the substrate 21 in the third direction Z. Optionally, the thickness direction of the substrate 21 is parallel to the third direction Z, that is, the substrate 21 is arranged parallel to the top wall 111; or when observed along the second direction Y, the thickness direction of the substrate 21 is inclined relative to the first direction X and the second direction Y. It should be noted that the present application is described as if the thickness direction of the substrate 21 is parallel to the third direction Z.

[0062] The substrate 21 includes a first portion 211 and two second portions 212. Along the first direction X, the first portion 211 is located on the side of the two adjacent side seal extensions 122A close to the first wall 112, and the first portion 211 and the first top surface 111A are arranged opposite to each other along the third direction Z to avoid the two side seal extensions 122A. Along the second direction Y, the two second portions 212 are respectively connected to the two ends of the first portion 211, and each second portion 212 is arranged opposite to the bending portion 121A of a battery cell 10 along the third direction Z and connected to the corresponding pole ear 13, so as to increase the layout area of ​​the substrate 21. The substrate 21 and the side seal extension 122A share the space in the third direction Z, which can reduce the space occupied by the substrate 21 in the third direction Z, which is conducive to increasing the volume of the main body 11 to increase the capacity of the battery 100A.

[0063] Please also read Figure 2 and Figure 3 In some embodiments, along the second direction Y, the second portion 212 overlaps with two adjacent side sealing extensions 122A. Observed along the third direction Z, the first portion 211 forms an avoidance groove on the substrate 21 between the two second portions 212 to avoid the two adjacent side sealing extensions 122A and the convex angle structure formed by the side sealing extensions 122A and the bending portion 121A, thereby facilitating the placement of the substrate 21 on the top walls 111 of the two battery cells 10.

[0064] Please also read Figure 3 and Figure 4 In some embodiments, the first bending section 1211 and the second portion 212 are disposed opposite to each other along the third direction Z. Along the first direction X, the first portion 211 and two adjacent second bending sections 1212 are disposed opposite to each other to reduce the risk of interference between the convex angle structure and the first portion 211 .

[0065] In some embodiments, along the first direction X, the distance between the first bending section 1211 and the first wall 112 is D1, and the distance between two adjacent side seal extensions 122A and the first wall 112 is D2, D1<D2, so as to reduce the risk of interference between the side seal extension 122A and the first part 211, and facilitate increasing the size of the first part 211 along the first direction X, which is beneficial to improving the structural strength and flow capacity of the first part 211.

[0066] It should be noted that D1 is measured in the following manner: multiple measuring points are selected on the side of the first bending section 1211 away from the root 121B, and the spacing value between each measuring point and the first wall 112 along the first direction X is measured, and the average value of the multiple spacing values ​​is D1. D2 is measured in the following manner: one of the two adjacent side seal extensions 122A closer to the first wall 112 is used as the measurement target, and multiple measuring points are selected on the side of the side seal extension 122A close to the first wall 112, and the spacing value between each measuring point and the first wall 112 along the first direction X is measured, and the average value of the multiple spacing values ​​is D2.

[0067] Please continue reading Figure 3 and Figure 4 In some embodiments, 0.15mm≤D2-D1≤0.25mm. When D2-D1 is too small (less than 0.15mm), the side seal extension 122A is likely to interfere with the first portion 211. When D2-D1 is too large (greater than 0.25mm), the side seal extension 122A is likely to lose a large packaging area, resulting in reduced packaging strength. By limiting 0.15mm≤D2-D1≤0.25mm, the risk of interference between the side seal extension 122A and the first portion 211 is reduced, and the packaging strength of the side seal extension 122A is improved.

[0068] Optionally, D2-D1 is 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, and any other value satisfying the range of 0.15mm≤D2-D1≤0.25mm.

[0069] In some embodiments, the circuit board assembly 20 includes a first electronic component (not shown), which is configured to form a protection circuit for protecting the battery cell 10. Along the third direction Z, the width of the second bending section 1212 in the first direction X gradually decreases, that is, the space occupied by the second bending section 1212 in the first direction X decreases as it moves away from the top wall 111. The first electronic component is arranged on the surface of the second portion 212 close to the bending portion 121A to increase the distance between the substrate 21 and the top wall 111 in the third direction Z, so that the substrate 21 avoids the larger part of the second bending section 1212, thereby reducing the risk of interference between the second bending section 1212 and the substrate 21.

[0070] Please continue reading Figure 3In some embodiments, along the first direction X, the width of the first portion 211 is W1, 1mm≤W1≤4mm, D2≥W1, 1.5mm≤D2≤4.5mm. When W1 is too small (less than 1mm), the structural strength and flow capacity of the first portion 211 are likely to be weak, and the temperature rise of the first portion 211 is likely to increase during the use of the substrate 21; when W1 is too large (greater than 4mm or greater than D2), the first portion 211 is likely to protrude out of the first wall 112 along the first direction X, resulting in space waste. By limiting 1mm≤W1≤4mm and D2≥W1, it is beneficial to improve the structural strength and flow capacity of the first portion 211, reduce the temperature rise of the first portion 211 during the use of the substrate 21, and improve the space utilization rate of the first portion 211 on the top wall 111.

[0071] Optionally, W1 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, or any other value in the range of 1 mm ≤ W1 ≤ 4 mm. D2 is 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, or any other value in the range of 1.5 mm ≤ D2 ≤ 4.5 mm.

[0072] Please continue reading Figure 3 In some embodiments, along the second direction Y, the length of the first portion 211 is L1, 3mm≤L1≤12mm. When L1 is too small (less than 3mm), the second portion 212 is likely to interfere with the convex corner structure; when L1 is too large (greater than 12mm), the fabric area of ​​the second portion 212 is likely to be reduced. By limiting 3mm≤L1≤12mm, the risk of the second portion 212 interfering with the convex corner structure is reduced, and the fabric area of ​​the second portion 212 is easily increased.

[0073] Optionally, L1 is 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, and any other value satisfying the range of 3 mm ≤ L1 ≤ 12 mm.

[0074] Please refer again Figure 4 In some embodiments, along the third direction Z, the height of the side seal extension portion 122A is H1, and H1 ≥ 1.5 mm, so as to improve the packaging strength of the side seal extension portion 122A.

[0075] Optionally, H1 is 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, or any other value satisfying the range of H1 ≥ 1.5 mm.

[0076] Please also read Figure 3 and Figure 4In some embodiments, the side seal extension 122A is cut to form a notch so that the side seal extension 122A avoids the first portion 211. Specifically, the side edge of the side seal extension 122A close to the first wall 112 is provided with a first notch 1221, and part of the first portion 211 is located in the first notch 1221, so as to reduce the risk of interference between the side seal extension 122A and the first portion 211.

[0077] The first notch 1221 has a first edge 1222 and a second edge 1223. The first edge 1222 extends along the third direction Z and is disposed opposite to the first portion 211 along the first direction X. The second edge 1223 extends along the first direction X and is disposed opposite to the first portion 211 along the third direction Z.

[0078] The length of the first edge 1222 is L2, 1mm≤L2≤5mm. When L2 is too small (less than 1mm), the second edge 1223 is likely to interfere with the first portion 211. When L2 is too large (greater than 5mm), the side seal extension portion 122A is likely to lose a large packaging area, resulting in reduced packaging strength. By limiting 1mm≤L2≤5mm, the risk of interference between the second edge 1223 and the first portion 211 is reduced, and the packaging strength of the side seal extension portion 122A is improved.

[0079] Optionally, L2 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, and any other value satisfying the range of 1 mm ≤ L2 ≤ 5 mm.

[0080] Furthermore, L2 = H1 to further reduce the risk of interference between the second edge 1223 and the first portion 211 .

[0081] Please continue reading Figure 4 The length of the second edge 1223 is L3, 0.5mm≤L3≤3.5mm. When L3 is too small (less than 0.5mm), the first edge 1222 is likely to interfere with the first portion 211; when L3 is too large (greater than 3.5mm), the side seal extension portion 122A is likely to lose a large packaging area, resulting in reduced packaging strength. By limiting 0.5mm≤L3≤3.5mm, the risk of interference between the first edge 1222 and the first portion 211 is reduced, and the packaging strength of the side seal extension portion 122A is improved.

[0082] Optionally, L3 is 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, and any other value satisfying the range of 0.5 mm≤L3≤3.5 mm.

[0083] Please continue reading Figure 4In some embodiments, along the first direction X, the distance between the first edge 1222 and the side edge of the side seal extension 122A away from the first wall 112 is D3, 1.5mm≤D3≤4.5mm. When D3 is too small (less than 1.5mm), the side seal extension 122A may lose a large packaging area, resulting in reduced packaging strength. When D3 is too large (greater than 4.5mm), the first edge 1222 may interfere with the first portion 211. By limiting 1.5mm≤D3≤4.5mm, the risk of interference between the first edge 1222 and the first portion 211 is reduced, and the packaging strength of the side seal extension 122A is improved.

[0084] Optionally, D3 is 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, and any other value satisfying the range of 1.5 mm≤D3≤4.5 mm.

[0085] Please also read Figure 5 and Figure 6 In some embodiments, the top wall 111 includes a second top surface 111B between the root portion 121B and the second wall 113. Optionally, the first top surface 111A is a deep pit surface of the battery 100A, and the second top surface 111B is a shallow pit surface of the battery 100A.

[0086] The battery 100A includes a first insulating member 31. The first insulating member 31 includes a first insulating portion 311, a second insulating portion 312, and a third insulating portion 313. Along the third direction Z, the first insulating portion 311 is disposed on the side of the two adjacent side sealing extensions 122A away from the top wall 111, and the second insulating portion 312 and the third insulating portion 313 are connected to both sides of the first insulating portion 311 along the first direction X. Observed along the third direction Z, the first insulating portion 311 covers the portion of the packaging portion 12 located between the two second portions 212. Observed along the first direction X, the second insulating portion 312 covers the gap between the two first top surfaces 111A and the portion of the packaging portion 12 located between the two second portions 212, and the third insulating portion 313 covers the gap between the two second top surfaces 111B and the portion of the packaging portion 12 located between the two second portions 212. The first insulating member 31 can improve the insulation stability between the portion of the packaging portion 12 located between the two second portions 212 and other structural members.

[0087] Optionally, the first insulating member 30 is DuPont paper.

[0088] In some embodiments, the battery 100A includes an injection molded part 40, the injection molded part 40 connects the first insulating part 30 and the area where the top wall 111 is separated from the first insulating part 30, and the injection molded part 40 covers the top seal 121, the tab 13 and the substrate 21. Specifically, the injection molded part 40 is formed in a set area by melting the injection material through the injection molding equipment and then solidifying. The first insulating part 30 can reduce the risk of the injection material penetrating into the gap between the two battery cells 10 during the injection molding process.

[0089] Please also read Figure 5 and Figure 7 In some embodiments, the battery 100A includes a second insulating member 32 , which is bonded between the first top surface 111A and the bent portion 121A to improve the structural stability of the top sealing portion 121 on the top wall 111 .

[0090] Optionally, the second insulating member 32 is a glue layer.

[0091] Please continue reading Figure 5 and Figure 7 In some embodiments, the battery 100A includes a third insulating member 33, which is bonded to the second top surface 111B and the side of the bent portion 121A away from the first top surface 111A. The third insulating member 33 is located between the bent portion 121A and the substrate 21 to improve the insulation stability between the top sealing portion 121 and the substrate 21.

[0092] Optionally, the third insulating member 33 is DuPont paper.

[0093] Please refer again Figure 5 and Figure 6 In some embodiments, the thickness direction of the substrate 21 is parallel to the third direction Z. The second portion 212 includes a first surface 212A, a second surface 212B, a third surface 212C, and a fourth surface 212D. The first surface 212A and the second surface 212B are arranged opposite to each other along the third direction Z, and the first surface 212A is close to the top wall 111, and the second surface 212B is far from the top wall 111. The third surface 212C and the fourth surface 212D are arranged opposite to each other along the first direction X, and the third surface 212C is close to the first wall 112, and the fourth surface 212D is close to the second wall 113.

[0094] The circuit board assembly 20 includes a first connector 22, and the first connector 22 is connected to the second portion 212. The first connector 22 is connected to the tab 13 to form a joint portion 22A, and the joint portion 22A is located on the third surface 212C. The joint portion 22A and the substrate 21 share a space in the third direction Z, which is beneficial to improving the space utilization rate of the circuit board assembly 20 on the top wall 111.

[0095] Please continue reading Figure 5In some embodiments, the third surface 212C includes a first body surface 2121, a first concave surface 2122, and a first connecting surface 2123. Along the second direction Y, the first body surface 2121 overlaps with the first portion 211, and the first concave surface 2122 is located on the side of the first body surface 2121 away from the first portion 211. Along the first direction X, the distance between the first body surface 2121 and the first wall 112 is D5, and the distance between the first concave surface 2122 and the first wall 112 is D6, D5<D6, and 0.2mm≤D6-D5≤0.8mm. The first connecting surface 2123 is connected between the first body surface 2121 and the first concave surface 2122. Along the first direction X, the coupling portion 22A is located on the first concave surface 2122, and along the second direction Y, the coupling portion 22A overlaps with the first connecting surface 2123. The joint portion 22A and the substrate 21 share the space in the first direction X and the second direction Y, which is beneficial to improving the space utilization of the circuit board assembly 20 on the top wall 111. By limiting 0.2mm≤D6-D5≤0.8mm, the joint portion 22A can use the accommodation space formed by the first concave surface 2122 and the first connecting surface 2123, and reduce the impact on the layout area of ​​the second portion 212.

[0096] Optionally, D6-D5 is one of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm and any other value satisfying the range of 0.2mm≤D6-D5≤0.8mm.

[0097] Please also read Figure 5 and Figure 7 In some embodiments, the first connecting member 22 is an "L"-shaped nickel sheet. The first connecting member 22 includes a first section 221, a second section 222, and a third section 223. The first section 221 is connected to the first surface 212A, the third section 223 is spaced apart from the third surface 212C along the first direction X, and the second section 222 is bent and connected between the first section 221 and the third section 223. Specifically, the third section 223 is spaced apart from the first concave surface 2122 along the first direction X.

[0098] The tab 13 includes a first extension section 131, a second extension section 132, a third extension section 133 and a fourth extension section 134 which are connected in sequence. The first extension section 131 extends from the bending portion 121A, the second extension section 132 is located on the side of the third section 223 away from the third surface 212C along the first direction X, the third extension section 133 is located on the side of the third section 223 away from the first top surface 111A along the third direction Z, and the fourth extension section 134 is located between the third section 223 and the third surface 212C along the first direction X and connects the third section 223. The fourth extension section 134 is connected to the third section 223 to form a joint portion 22A, which is conducive to improving the stability of the connection between the first connector 22 and the tab 13.

[0099] In some embodiments, when viewed along the third direction Z, the fourth surface 212D is provided with a third notch 2124 , and the injection molded part 40 is filled in the third notch 2124 , so that the injection molded material can penetrate into the area where the top wall 111 is separated from the first insulating part 30 during the injection molding process.

[0100] Please refer again Figure 1 and Figure 2 In some embodiments, the circuit board assembly 20 includes a flexible circuit board 23, the flexible circuit board 23 is connected to the substrate 21, and the flexible circuit board 23 is configured to be electrically connected to an external circuit. The injection molded part 40 covers the portion where the flexible circuit board 23 is connected to the substrate 21 to improve the stability of the connection between the flexible circuit board 23 and the substrate 21.

[0101] Optionally, a concave portion 41 is provided on a surface of the injection molded part 40 away from the top wall 111 , and the flexible circuit board 23 extends out from the concave portion 41 , which is beneficial to expand the movable angle of the flexible circuit board 23 .

[0102] Example 2 Please also read Figure 8 and Fig. 9 One embodiment of the present application further provides a battery 100B. The difference between the battery 100B and the battery 100A is that the top seal portion 121 is cut to form a notch.

[0103] The bending portion 121A includes a first side edge 121C away from the root portion 121B. The first side edge 121C is provided with a second notch 1213. Along the second direction Y, the second notch 1213 is close to two adjacent side seal extension portions 122A. The second notch 1213 has a third edge 1214 and a fourth edge 1215. The third edge 1214 extends along the first direction X and is arranged opposite to the first portion 211 along the third direction Z. When viewed along the first direction X, the fourth edge 1215 extends from the third edge 1214 in a direction away from the top wall 111. Along the first direction X, the first portion 211 is arranged opposite to the two adjacent fourth edges 1215. The third edge 1214 is located in the first bending section 1211, and one end of the fourth edge 1215 is located in the first bending section 1211, and the other end is located in the second bending section 1212. The second notch 1213 is provided to reduce the space occupied by the second bending section 1212 in the first direction X, thereby reducing the risk of interference between the second bending section 1212 and the substrate 21 .

[0104] Except for the above differences, the parameters of the battery 100B and the battery 100A are substantially the same, and reference may be made to the description of the battery 100A above.

[0105] Example 3 See also Fig.10One embodiment of the present application further provides a battery 100C. The difference between the battery 100C and the battery 100A is that the side seal extension portion 122A is not cut to form a notch.

[0106] The side seal portion 122 includes a side seal body portion 122B, the side seal body portion 122B and the side seal extension portion 122A are connected along the third direction Z, and the side seal body portion 122B is arranged opposite to the side wall 144. Along the first direction X, the distance between the side seal extension portion 122A and the first wall 112 is equal to the distance between the side seal body portion 122B and the first wall 112, that is, the side seal extension portion 122A is not cut to form a notch.

[0107] Along the first direction X, the distance between two adjacent side seal extensions 122A and the first wall 112 is D2, 1.5mm≤D2≤4.5mm, so that the first portion 211 is located on the side of the two adjacent side seal extensions 122A close to the first wall 112, and the first portion 211 and the first top surface 111A are arranged opposite to each other along the third direction Z.

[0108] It should be noted that the battery 100C is suitable for batteries with a relatively thick thickness, and the batteries 100A and 100B are suitable for batteries with a relatively thin thickness.

[0109] Except for the above differences, the parameters of the battery 100C and the battery 100A are substantially the same, and reference may be made to the description of the above battery 100A.

[0110] Example 4 Please also read Fig.11 and Fig.12 One embodiment of the present application further provides a battery 100D. The difference between the battery 100D and the battery 100A lies in the connection structure between the first connector 22 and the tab 13.

[0111] The first connecting member 22 includes a first section 221, a second section 222, a third section 223, a fourth section 224 and a fifth section 225. The first section 221 is connected to the first surface 212A, the third section 223 is spaced apart from the third surface 212C along the first direction X, the second section 222 is bent and connected between the first section 221 and the third section 223, the fifth section 225 is located on a side of the third section 223 away from the third surface 212C along the first direction X, and the fourth section 224 is bent and connected between the third section 223 and the fifth section 225.

[0112] The tab 13 includes a first extension section 131, a second extension section 132, a third extension section 133 and a fourth extension section 134 which are connected in sequence. The first extension section 131 extends from the bending portion 121A, the second extension section 132 is located on a side of the fifth section 225 away from the third section 223 along the first direction X and is connected to the fifth section 225, the third extension section 133 is located on a side of the fourth section 224 away from the first top surface 111A along the third direction Z, and the fourth extension section 134 is located between the third section 223 and the third surface 212C along the first direction X and is connected to the third section 223. The fourth extension section 134 is connected to the third section 223 and the second extension section 132 is connected to the fifth section 225 to form a joint portion 22A, which is conducive to improving the stability of the connection between the first connector 22 and the tab 13.

[0113] See also Fig.13 In some embodiments, the fourth section 224 includes a first subsection 224A and a second subsection 224B spaced apart along the second direction Y, and a gap 224C penetrating the first connecting member 22 is provided between the first subsection 224A and the second subsection 224B to facilitate bending of the fourth section 224.

[0114] Except for the above differences, the parameters of the battery 100D are substantially the same as those of the battery 100A, and reference may be made to the description of the battery 100A.

[0115] Example 5 Please also read Fig.14 One embodiment of the present application further provides a battery 100E. The difference between the battery 100E and the battery 100D is that the top sealing portion 121 is cut to form a notch.

[0116] The bending portion 121A includes a first side edge 121C away from the root portion 121B. The first side edge 121C is provided with a second notch 1213. Along the second direction Y, the second notch 1213 is close to two adjacent side seal extension portions 122A. The second notch 1213 has a third edge 1214 and a fourth edge 1215. The third edge 1214 extends along the first direction X and is arranged opposite to the first portion 211 along the third direction Z. When viewed along the first direction X, the fourth edge 1215 extends from the third edge 1214 in a direction away from the top wall 111. Along the first direction X, the first portion 211 is arranged opposite to the two adjacent fourth edges 1215. The third edge 1214 is located in the first bending section 1211, and one end of the fourth edge 1215 is located in the first bending section 1211, and the other end is located in the second bending section 1212. The second notch 1213 is provided to reduce the space occupied by the second bending section 1212 in the first direction X, thereby reducing the risk of interference between the second bending section 1212 and the substrate 21 .

[0117] Except for the above differences, the parameters of the battery 100E and the battery 100D are substantially the same, and reference may be made to the description of the battery 100D.

[0118] Example 6 See also Fig.15 One embodiment of the present application further provides a battery 100F. The difference between the battery 100F and the battery 100D is that the side seal extension portion 122A is not cut to form a notch.

[0119] The side seal portion 122 includes a side seal body portion 122B, the side seal body portion 122B and the side seal extension portion 122A are connected along the third direction Z, and the side seal body portion 122B is arranged opposite to the side wall 144. Along the first direction X, the distance between the side seal body portion 122B and the first wall 112 is equal to D 1， That is, the side seal extension portion 122A is not cut to form a notch.

[0120] Along the first direction X, the distance between two adjacent side seal extensions 122A and the first wall 112 is D2, 1.5mm≤D2≤4.5mm, so that the first portion 211 is located on the side of the two adjacent side seal extensions 122A close to the first wall 112, and the first portion 211 and the first top surface 111A are arranged opposite to each other along the third direction Z.

[0121] It should be noted that the battery 100F is suitable for batteries with a relatively thick thickness, and the batteries 100D and 100E are suitable for batteries with a relatively thin thickness.

[0122] Except for the above differences, the parameters of the battery 100F and the battery 100D are substantially the same, and reference may be made to the description of the battery 100D above.

[0123] Example 7 Please also read Fig.16 and Fig.17 One embodiment of the present application further provides a battery 100G. The difference between the battery 100G and the battery 100A lies in the connection structure between the first connector 22 and the tab 13.

[0124] The first connecting member 22 is a nickel block and is located on the third surface 212C.

[0125] The tab 13 includes a first extension section 131, a second extension section 132, and a third extension section 133 connected in sequence. The first extension section 131 extends from the bent portion 121A, the second extension section 132 is located on one side of the first connector 22 along the first direction X and is connected to the first connector 22, and the third extension section 133 is stacked on the second surface 212B. The second extension section 132 is connected to the first connector 22 to form a joint portion 22A, which is conducive to improving the stability of the connection between the first connector 22 and the tab 13.

[0126] It can be understood that, in some embodiments, the third surface 212C is provided with a pad, and the second extension section 132 is welded and connected to the pad of the third surface 212C.

[0127] It is understandable that, in some embodiments, the second surface 212B is provided with a pad, the second extension section 132 is located on one side of the third surface 212C along the first direction X, and the second extension section 132 is welded and connected to the pad on the second surface 212B.

[0128] Except for the above differences, the parameters of battery 100G and battery 100A are substantially the same, and reference may be made to the description of battery 100D above.

[0129] Example 8 Please also read Fig.18 One embodiment of the present application further provides a battery 100H. The difference between the battery 100E and the battery 100G is that the top seal portion 121 is cut to form a notch.

[0130] The bending portion 121A includes a first side edge 121C away from the root portion 121B. The first side edge 121C is provided with a second notch 1213. Along the second direction Y, the second notch 1213 is close to two adjacent side seal extension portions 122A. The second notch 1213 has a third edge 1214 and a fourth edge 1215. The third edge 1214 extends along the first direction X and is arranged opposite to the first portion 211 along the third direction Z. When viewed along the first direction X, the fourth edge 1215 extends from the third edge 1214 in a direction away from the top wall 111. Along the first direction X, the first portion 211 is arranged opposite to the two adjacent fourth edges 1215. The third edge 1214 is located in the first bending section 1211, and one end of the fourth edge 1215 is located in the first bending section 1211, and the other end is located in the second bending section 1212. The second notch 1213 is provided to reduce the space occupied by the second bending section 1212 in the first direction X, thereby reducing the risk of interference between the second bending section 1212 and the substrate 21 .

[0131] Except for the above differences, the parameters of 100H and battery 100G are roughly the same, and reference can be made to the description of the above battery 100G.

[0132] Example 9 See also Fig.19 One embodiment of the present application further provides a battery 100I. The difference between the battery 100I and the battery 100G is that the side seal extension portion 122A is not cut to form a notch.

[0133] The side seal portion 122 includes a side seal body portion 122B, the side seal body portion 122B and the side seal extension portion 122A are connected along the third direction Z, and the side seal body portion 122B is arranged opposite to the side wall 144. Along the first direction X, the distance between the side seal body portion 122B and the first wall 112 is equal to D 1， That is, the side seal extension portion 122A is not cut to form a notch.

[0134] Along the first direction X, the distance between two adjacent side seal extensions 122A and the first wall 112 is D2, 1.5mm≤D2≤4.5mm, so that the first portion 211 is located on the side of the two adjacent side seal extensions 122A close to the first wall 112, and the first portion 211 and the first top surface 111A are arranged opposite to each other along the third direction Z.

[0135] It should be noted that the battery 100I is suitable for batteries with a relatively thick thickness, and the battery 100G and the battery 100H are suitable for batteries with a relatively thin thickness.

[0136] Except for the above differences, the parameters of battery 100I and battery 100G are substantially the same, and reference may be made to the description of battery 100D above.

[0137] Example 10 Please also read Fig. 20 and Fig.21 One embodiment of the present application further provides a battery 100J. The difference between the battery 100J and the battery 100A lies in the connection structure between the first connector 22 and the tab 13.

[0138] The first connecting member 22 is located on the first surface 212A. The first connecting member 22 is a "U"-shaped nickel sheet. The first connecting member 22 includes a first section 221, a second section 222 and a third section 223. The first section 221 is connected to the first surface 212A, the third section 223 is spaced apart from the first section 221 along the third direction Z, and the second section 222 is bent and connected between the first section 221 and the third section 223.

[0139] The tab 13 includes a first extension section 131, a second extension section 132, and a third extension section 133 connected in sequence. The first extension section 131 extends from the bent portion 121A, the third extension section 133 is located between the first section 221 and the third section 223 and connected to the first section 221, and the second extension section 132 is bent and connected between the first extension section 131 and the third extension section 133, which is beneficial to improve the stability of the connection between the first connector 22 and the tab 13.

[0140] Except for the above differences, the parameters of the battery 100J and the battery 100A are substantially the same, and reference may be made to the description of the above battery 100A.

[0141] Embodiment 11 Please also read Fig. 22 One embodiment of the present application further provides a battery 100K. The difference between the battery 100E and the battery 100J is that the top sealing portion 121 is cut to form a notch.

[0142] The bending portion 121A includes a first side edge 121C away from the root portion 121B. The first side edge 121C is provided with a second notch 1213. Along the second direction Y, the second notch 1213 is close to two adjacent side seal extension portions 122A. The second notch 1213 has a third edge 1214 and a fourth edge 1215. The third edge 1214 extends along the first direction X and is arranged opposite to the first portion 211 along the third direction Z. When viewed along the first direction X, the fourth edge 1215 extends from the third edge 1214 in a direction away from the top wall 111. Along the first direction X, the first portion 211 is arranged opposite to the two adjacent fourth edges 1215. The third edge 1214 is located in the first bending section 1211, and one end of the fourth edge 1215 is located in the first bending section 1211, and the other end is located in the second bending section 1212. The second notch 1213 is provided to reduce the space occupied by the second bending section 1212 in the first direction X, thereby reducing the risk of interference between the second bending section 1212 and the substrate 21 .

[0143] Except for the above differences, the parameters of the battery 100K and the battery 100J are substantially the same, and reference may be made to the description of the battery 100J above.

[0144] Example 12 See also Fig.23 One embodiment of the present application further provides a battery 100L. The difference between the battery 100L and the battery 100J is that the side seal extension portion 122A is not cut to form a notch.

[0145] The side seal portion 122 includes a side seal body portion 122B, the side seal body portion 122B and the side seal extension portion 122A are connected along the third direction Z, and the side seal body portion 122B is arranged opposite to the side wall 144. Along the first direction X, the distance between the side seal body portion 122B and the first wall 112 is equal to D 1， That is, the side seal extension portion 122A is not cut to form a notch.

[0146] Along the first direction X, the distance between two adjacent side seal extensions 122A and the first wall 112 is D2, 1.5mm≤D2≤4.5mm, so that the first portion 211 is located on the side of the two adjacent side seal extensions 122A close to the first wall 112, and the first portion 211 and the first top surface 111A are arranged opposite to each other along the third direction Z.

[0147] It should be noted that the battery 100L is suitable for batteries with a relatively thick thickness, and the batteries 100J and 100K are suitable for batteries with a relatively thin thickness.

[0148] Except for the above differences, the parameters of the battery 100L and the battery 100J are substantially the same, and reference may be made to the description of the battery 100J above.

[0149] Embodiment 13 See also Fig.24 An embodiment of the present application further provides a terminal device 200, comprising the battery (100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I, 100J, 100K, 100L) in any of the above embodiments.

[0150] Optionally, the terminal device 200 can be a mobile phone, a tablet computer, a laptop computer, a smart wearable product (e.g., a smart watch, a smart bracelet), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, or other device with a rechargeable battery.

[0151] In summary, in the above-mentioned batteries (100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I, 100J, 100K, 100L) and the terminal device 200, the substrate 21 includes a first portion 211 and two second portions 212. Along the first direction X, the first portion 211 is located on the side of the two adjacent side seal extensions 122A close to the first wall 112, and the first portion 211 and the first top surface 111A are arranged opposite to each other along the third direction Z to avoid the two side seal extensions 122A. Along the second direction Y, the two second portions 212 are respectively connected to the two ends of the first portion 211, and each second portion 212 is arranged opposite to the bending portion 121A of a battery cell 10 along the third direction Z and connected to the corresponding pole ear 13. The substrate 21 and the side seal extension portion 122A share the space in the third direction Z, which can reduce the space occupied by the substrate 21 in the third direction Z, and is beneficial to increasing the volume of the main body 11 to increase the capacity of the battery (100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I, 100J, 100K, 100L).

[0152] In addition, those skilled in the art may also make other changes within the spirit of the present application. Of course, these changes made according to the spirit of the present application should be included in the scope disclosed in the present application.

Claims

1. A battery, characterized in that: The battery comprises: Two battery cells, the thickness direction of the two battery cells is a first direction, and when viewed along the first direction, the two battery cells are arranged along a second direction, the battery cell comprises a main body, a packaging portion and a pole ear, the main body comprises a top wall, a first wall and a second wall connected to the top wall along the first direction, and two side walls connected to the top wall along the second direction, the packaging portion comprises a top sealing portion connected to the top wall and a side sealing portion connected to the side wall, the top sealing portion comprises a bending portion and a root portion connected between the bending portion and the top wall, the top wall comprises a first top surface located between the root and the first wall, the bending portion is bent toward the first top surface, the pole ear extends from the bending portion, the side sealing portion is bent in a direction toward the first wall, the side sealing portion comprises a side sealing extension portion protruding from the top wall along a third direction, the side sealing extension portion is connected to the bending portion, and the first direction, the second direction and the third direction are perpendicular to each other; A circuit board assembly, the circuit board assembly comprising a substrate, the thickness direction of the substrate intersecting with the first direction, the substrate comprising a first portion and two second portions, along the first direction, the first portion is located on the side of two adjacent side seal extensions close to the first wall, and the first portion and the first top surface are arranged opposite to each other along the third direction, along the second direction, the two second portions are respectively connected to the two ends of the first portion, and each of the second portions is arranged opposite to the bending portion of a battery cell along the third direction and connected to the corresponding pole ear.

2. The battery according to claim 1, characterized in that The bending portion includes a first bending section and second bending sections connected to two ends of the first bending section along the second direction, the first bending section and the second section are arranged opposite to each other along the third direction, the second bending section extends from the first bending section along the third direction toward a direction away from the top wall, the second bending section is connected between the first bending section and the side seal extension portion, and the first section is arranged opposite to two adjacent second bending sections along the first direction; Along the first direction, the distance between the first bending section and the first wall is D1, and the distance between two adjacent side seal extension portions and the first wall is D2, D1<D2, 0.15mm≤D2-D1≤0.25mm.

3. The battery according to claim 1, characterized in that Along the first direction, the width of the first portion is W1, 1 mm ≤ W1 ≤ 4 mm, D2 ≥ W1, 1.5 mm ≤ D2 ≤ 4.5 mm; Along the second direction, the length of the first portion is L1, 3mm≤L1≤12mm.

4. The battery according to claim 1, characterized in that A first notch is provided on a side edge of the side seal extension portion close to the first wall, and a portion of the first portion is located in the first notch.

5. The battery according to claim 4, characterized in that The first notch has a first edge and a second edge, the first edge extends along the third direction and is arranged opposite to the first portion along the first direction, the second edge extends along the first direction and is arranged opposite to the first portion along the third direction, the length of the first edge is L2, 1mm≤L2≤5mm, and the length of the second edge is L3, 0.5mm≤L3≤3.5mm.

6. The battery according to claim 5, characterized in that Along the first direction, a distance between the first edge and a side of the side seal extension portion away from the first wall is D3, and 1.5 mm≤D3≤4.5 mm.

7. The battery according to claim 1 or 4, characterized in that: The circuit board assembly includes a first electronic component, and the first electronic component is arranged on a surface of the second portion close to the bending portion; The bending portion includes a first bending section and a second bending section connected to both ends of the first bending section along the second direction, the first bending section and the second section are arranged opposite to each other along the third direction, the second bending section extends from the first bending section along the third direction toward a direction away from the top wall, the second bending section is connected between the first bending section and the side seal extension portion, and along the first direction, the first section is arranged opposite to two adjacent second bending sections.

8. The battery according to claim 1 or 4, characterized in that The bending portion comprises a first side away from the root portion, the first side is provided with a second notch, and along the second direction, the second notch is close to two adjacent side seal extension portions; The second notch has a third edge and a fourth edge, the third edge extends along the first direction and is arranged opposite to the first portion along the third direction, and when viewed along the first direction, the fourth edge extends from the third edge in a direction away from the top wall, and along the first direction, the first portion is arranged opposite to two adjacent fourth edges.

9. The battery according to claim 1, characterized in that The top wall includes a second top surface between the root portion and the second wall; The battery comprises a first insulating member, the first insulating member comprises a first insulating portion, a second insulating portion and a third insulating portion, along the third direction, the first insulating portion is arranged on a side of two adjacent side seal extension portions away from the top wall, the second insulating portion and the third insulating portion are connected to both sides of the first insulating portion along the first direction, when viewed along the third direction, the first insulating portion covers a portion of the packaging portion between the two second portions, when viewed along the first direction, the second insulating portion covers a gap between the two first top surfaces and a portion of the packaging portion between the two second portions, and the third insulating portion covers a gap between the two second top surfaces and a portion of the packaging portion between the two second portions; The battery includes an injection molded part, which connects the first insulating part and the area where the top wall is separated from the first insulating part, and the injection molded part covers the top sealing part, the tab and the substrate.

10. The battery according to claim 9, characterized in that The thickness direction of the substrate is parallel to the third direction, the second portion includes a first surface, a second surface, a third surface and a fourth surface, the first surface and the second surface are arranged opposite to each other along the third direction, the first surface is close to the top wall, the second surface is far from the top wall, the third surface and the fourth surface are arranged opposite to each other along the first direction, the third surface is close to the first wall, and the fourth surface is close to the second wall; The circuit board assembly includes a first connector, the first connector is connected to the second portion, the first connector is connected to the tab and forms a joint portion, and the joint portion is located on the third surface.

11. The battery according to claim 10, characterized in that The third surface includes a first body surface, a first concave surface and a first connecting surface. Along the second direction, the first body surface overlaps with the first part, and the first concave surface is located on the side of the first body surface away from the first part. Along the first direction, the distance between the first body surface and the first wall is D5, and the distance between the first concave surface and the first wall is D6, D5<D6, and 0.2mm≤D6-D5≤0.8mm, the first connecting surface is connected between the first body surface and the first concave surface, along the first direction, the combining portion is located on the first concave surface, and along the second direction, the combining portion overlaps with the first connecting surface.

12. The battery according to claim 10, characterized in that The first connecting member comprises a first section, a second section and a third section, the first section is connected to the first surface, the third section is spaced apart from the third surface along the first direction, and the second section is bent and connected between the first section and the third section; The pole ear includes a first extension segment, a second extension segment, a third extension segment and a fourth extension segment connected in sequence, the first extension segment extends from the bending portion, the second extension segment is located along the first direction on a side of the third segment away from the third surface, the third extension segment is located along the third direction on a side of the third segment away from the first top surface, and the fourth extension segment is located between the third segment and the third surface along the first direction and connects the third segment.

13. The battery according to claim 10, characterized in that The first connecting member includes a first section, a second section, a third section, a fourth section and a fifth section, the first section is connected to the first surface, the third section and the third surface are spaced apart along the first direction, the second section is bent and connected between the first section and the third section, the fifth section is located on a side of the third section away from the third surface along the first direction, and the fourth section is bent and connected between the third section and the fifth section; The pole ear includes a first extension segment, a second extension segment, a third extension segment and a fourth extension segment connected in sequence, the first extension segment extends from the bending portion, the second extension segment is located along the first direction on a side of the fifth segment away from the third segment and connected to the fifth segment, the third extension segment is located along the third direction on a side of the fourth segment away from the first top surface, and the fourth extension segment is located between the third segment and the third surface along the first direction and connected to the third segment.

14. The battery according to claim 13, characterized in that The fourth section includes a first sub-section and a second sub-section spaced apart along the second direction, and a gap penetrating the first connecting member is provided between the first sub-section and the second sub-section.

15. The battery according to claim 10, characterized in that When viewed along the third direction, the fourth surface is provided with a third notch, and the injection molded part fills the third notch.

16. A terminal device, characterized in that: The terminal device comprises the battery according to any one of claims 1 to 15.

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