Battery and terminal device

Abstract

A battery and a terminal device. The battery comprises a battery cell. The battery cell comprises an electrode assembly, a casing, and a pole. The electrode assembly is arranged in the casing, and the casing is electrically connected to the electrode assembly. The casing comprises a first side wall, a second side wall, a third side wall, a fourth side wall, a fifth side wall, and a sixth side wall. The first side wall and the second side wall are arranged opposite to each other along a first direction, the third side wall and the fourth side wall are arranged opposite to each other along a second direction, and the fifth side wall and the sixth side wall are arranged opposite to each other along a third direction. The first side wall is provided with a first recess and a first body; or the third side wall is provided with a first recess and a first body; or the fifth side wall is provided with a first recess and a first body. The pole is connected to the first recess and insulated from the first recess. One end of the pole is electrically connected to the electrode assembly, and the other end of the pole extends into a first accommodating space formed by the first recess. The battery facilitates improvement of energy density.

Description

Battery and terminal device

[0001] This application claims priority to Chinese Patent Application No. 202411517657.5, filed on October 28, 2024, entitled "Battery and Terminal Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of energy storage technology, and in particular to a battery and terminal device. Background Technology

[0003] In existing hard-shell batteries, the terminals are usually protruding from the top wall of the metal casing, resulting in a large gap between the superimposed dimensions on the top wall of the terminals, which in turn causes a loss of battery energy density. Summary of the Invention

[0004] In view of the above, this application provides a battery that is beneficial to improving energy density.

[0005] Embodiments of this application provide a battery, which includes a battery cell. The battery cell includes an electrode assembly, a housing, and terminals. The electrode assembly is disposed within the housing, and the housing is electrically connected to the electrode assembly, and the housing has a first polarity. The housing includes a first sidewall, a second sidewall, a third sidewall, a fourth sidewall, a fifth sidewall, and a sixth sidewall. The first sidewall and the second sidewall are disposed opposite each other along a first direction, the third sidewall and the fourth sidewall are disposed opposite each other along a second direction, and the fifth sidewall and the sixth sidewall are disposed opposite each other along a third direction. The first direction is the thickness direction of the battery cell, the second direction is the width direction of the battery cell, and the third direction is the length direction of the battery cell. The first sidewall has a first recess and a first body, the first recess being recessed relative to the first body along the first direction to form a first accommodating space; or the third sidewall has a first recess and a first body, the first recess being recessed relative to the first body along the second direction to form a first accommodating space; or the fifth sidewall has a first recess and a first body, the first recess being recessed relative to the first body along the third direction to form a first accommodating space. The electrode post is connected to and insulated from the first recess. One end of the electrode post is electrically connected to the electrode assembly and has a second polarity. The other end of the electrode post extends into the first accommodating space. The first polarity and the second polarity are different.

[0006] In the aforementioned battery, a first sidewall has a first recess and a first body, the first recess being recessed relative to the first body along a first direction to form a first accommodating space; or a third sidewall has a first recess and a first body, the first recess being recessed relative to the first body along a second direction to form a first accommodating space; or a fifth sidewall has a first recess and a first body, the first recess being recessed relative to the first body along a third direction to form a first accommodating space. One end of the electrode post is electrically connected to the electrode assembly, and the other end of the electrode post extends into the first accommodating space. Compared with the existing method of the electrode post protruding from the top wall of the casing, the size of the electrode post stacked on the fifth sidewall can be reduced, which is beneficial to reducing the battery packaging length and thus improving the battery energy density.

[0007] In some embodiments of this application, the fifth sidewall has a first polarity. The battery also includes a circuit board assembly. The circuit board assembly includes a protection plate, a first adapter, and a second adapter. The protection plate is disposed on the side of the fifth sidewall away from the electrode assembly. The fifth sidewall has a first opening communicating with a first accommodating space. One end of the first adapter extends into the first accommodating space from the first opening and connects to an electrode post, and the other end of the first adapter connects to the protection plate. The second adapter connects the fifth sidewall and the protection plate. The protection plate is electrically connected to the battery cell through the first and second adapters.

[0008] In some embodiments of this application, the electrode assembly includes an electrode group, a first tab, and a second tab. The polarity of the first tab is opposite to that of the second tab. The electrode group includes a first surface, which includes a first body surface and a first concave surface and a second concave surface connected to both sides of the first body surface along a second direction. The first body surface and the fifth sidewall are disposed opposite each other along a third direction, and the first and second concave surfaces are respectively recessed relative to the first body surface along a third direction. The first recess is located within the space formed by the first concave surface, the first tab extends from the first concave surface and connects to the electrode post, and the second tab extends from the second concave surface and is electrically connected to the housing. The connection between the first tab and the electrode post shares the space in the second direction and the third direction with the electrode group, and the connection between the first tab and the housing shares the space in the second direction and the third direction with the electrode group, which is beneficial to improving the energy density of the battery.

[0009] In some embodiments of this application, the first sidewall is provided with a first recess and a first body. The first recess is recessed relative to the first body along a first direction to form a first accommodating space. The first recess includes a first wall, a second wall, and a third wall. The first wall and the second sidewall are disposed opposite each other along the first direction, and the pole post passes through the first wall along the first direction. The second wall and the third wall are connected between the first wall and the first body. Viewed along the first direction, the second wall connects to the fifth sidewall and extends toward the sixth sidewall, and the third wall connects to the third sidewall and extends toward the fourth sidewall. The second wall connects to the third wall so that the shape of the first accommodating space is adapted to the shape of the first adapter.

[0010] In some embodiments of this application, the thickness direction of the protective plate is perpendicular to the first direction, and the protective plate and the fifth sidewall are disposed opposite each other along the third direction to reduce the space occupied by the protective plate in the third direction, which is beneficial to reducing the battery packaging length and thus improving the battery energy density. The first adapter includes a first part, a second part, and a first connecting part. The first part is disposed opposite to the first wall along the first direction and connected to the terminal post, the second part is disposed opposite to the protective plate along the third direction and connected to the protective plate, and the first connecting part is connected between the first part and the second part to improve the stability of the first adapter connected to the terminal post and the protective plate.

[0011] In some embodiments of this application, the third sidewall is provided with a first recess and a first body. The first recess is recessed relative to the first body along a second direction to form a first accommodating space. The first recess includes a fourth wall and a fifth wall. Viewed along the first direction, the fourth wall connects to the fifth sidewall and extends toward a sixth sidewall, and the fifth wall connects to the first body and extends toward the fourth sidewall. The fourth wall connects to the fifth wall so that the shape of the first accommodating space is adapted to the shape of the first adapter. The pole passes through the fourth wall along the second direction.

[0012] In some embodiments of this application, the thickness direction of the protective plate is perpendicular to the first direction, and the protective plate and the fifth sidewall are arranged opposite each other along the third direction to reduce the space occupied by the protective plate in the third direction, which is beneficial to reducing the battery packaging length and thus improving the battery energy density. The first adapter includes a third part and a fourth part. The third part and the fourth wall are arranged opposite each other along the second direction and connected to the terminal post, and the fourth part is arranged opposite to the protective plate along the third direction and connected to the protective plate. The third part connects to the fourth part to improve the stability of the first adapter connected to the terminal post and the protective plate.

[0013] In some embodiments of this application, the fifth sidewall is provided with a first recess and a first body. The first recess is recessed relative to the first body along a third direction to form a first accommodating space. The first recess includes a sixth wall and a seventh wall. Viewed along a first direction, the sixth wall connects to the first body and extends toward the sixth sidewall, and the seventh wall connects to the third sidewall and extends toward the fourth sidewall. The sixth wall connects to the seventh wall so that the shape of the first accommodating space is adapted to the shape of the first adapter. The pole passes through the seventh wall along a third direction.

[0014] In some embodiments of this application, the thickness direction of the protective plate is perpendicular to the first direction, and the protective plate and the first body are disposed opposite each other along a third direction to reduce the space occupied by the protective plate in the third direction, which is beneficial to reducing the battery packaging length and thus improving the battery energy density. The first adapter includes a fifth part, a sixth part, and a second connecting part. The fifth part and the seventh wall are disposed opposite each other along a third direction and connected to the terminal post, the sixth part is disposed opposite each other to the protective plate along a third direction and connected to the protective plate, and the second connecting part is connected between the fifth part and the sixth part to improve the stability of the first adapter connected to the terminal post and the protective plate.

[0015] In some embodiments of this application, the fifth sidewall is further provided with a second recess, which is recessed relative to the first body along a third direction to form a second accommodating space. The second recess and the first recess are located at opposite ends of the first body along a second direction. The second recess is located within the space formed by the second concave surface, and the second electrode tab extends from the second concave surface and is welded to one of the first sidewall, the second sidewall, and the fourth sidewall. One end of the second adapter is connected to a protective plate, and the other end of the second adapter extends into the second accommodating space and is welded to the second recess, thereby reducing the risk of burn-through caused by welding the fifth sidewall twice and improving the safety performance of the battery.

[0016] In some embodiments of this application, the second recess includes a first inner wall and a second inner wall. The first inner wall is connected to the first body and extends toward the sixth side wall, the second inner wall is connected to the fourth side wall and extends toward the third side wall, and the first inner wall is connected to the second inner wall. The second inner wall is connected to the second adapter so that the shape of the second accommodating space is adapted to the shape of the second adapter.

[0017] In some embodiments of this application, viewed along a third direction, the protective plate is separate from the second inner wall to reduce the risk of interference between the protective plate and the welding tool when the second inner wall is welded to the second adapter. The second adapter includes a first extension, a second extension, and a first bend. The first extension is disposed opposite to and welded to the second inner wall along a third direction, the second extension is disposed opposite to and connected to the protective plate along a third direction, and the first bend is disposed opposite to and connected between the first extension and the second extension along a second direction to improve the stability of the second adapter connection between the second recess and the protective plate.

[0018] In some embodiments of this application, the protective plate includes a protrusion. Viewed along a third direction, the protrusion overlaps with the second inner wall to increase the layout space of the protective plate. The second adapter includes a third extension, a fourth extension, and a second bend. The third extension is disposed opposite to and welded to the second inner wall along a third direction. The fourth extension is disposed opposite to and connected to the protrusion along a third direction. The third extension is disposed opposite to the fourth extension along a third direction. The second bend connects between the third extension and the fourth extension to improve the stability of the second adapter's connection to the second recess and the protective plate. Viewed along a third direction, the third and fourth extensions are located within the second inner wall. Viewed along a second direction, the third and fourth extensions are located within the first inner wall to reduce space waste caused by the second adapter protruding from the second accommodating space, which helps to reduce the battery's packaging length and thus improve the battery's energy density.

[0019] In some embodiments of this application, the battery further includes a first insulating member, at least a portion of which is located between the first adapter and the housing, to improve the stability of the insulation between the first adapter and the housing.

[0020] In some embodiments of this application, the first insulating member is formed by curing insulating adhesive applied to the housing. The first insulating member includes a first insulating portion, a second insulating portion, and a third insulating portion. The first insulating portion is disposed in the first recess and located on the periphery of the pole post to provide insulation and buffering in the first recess, reducing the risk of short circuit caused by interference between the first adapter and the first recess. The second insulating portion is disposed between the protective plate and the fifth sidewall to improve the insulation stability between the protective plate and the fifth sidewall. The third insulating portion is disposed between the first adapter and the fifth sidewall to improve the insulation stability between the first adapter and the fifth sidewall.

[0021] Embodiments of this application also provide a terminal device, which includes any of the batteries described in the above embodiments.

[0022] In the aforementioned battery and terminal device, a first sidewall is provided with a first recess and a first body, the first recess being recessed relative to the first body along a first direction to form a first accommodating space; or a third sidewall is provided with a first recess and a first body, the first recess being recessed relative to the first body along a second direction to form a first accommodating space; or a fifth sidewall is provided with a first recess and a first body, the first recess being recessed relative to the first body along a third direction to form a first accommodating space. One end of the electrode post is electrically connected to the electrode assembly, and the other end of the electrode post extends into the first accommodating space. Compared with the existing method of the electrode post protruding from the top wall of the casing, the size of the electrode post stacked on the fifth sidewall can be reduced, which is beneficial to reducing the battery packaging length and thus improving the battery energy density. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the battery structure in one embodiment of this application.

[0024] Figure 2 is a schematic diagram of the battery circuit board assembly separated from the top wall in one embodiment of this application.

[0025] Figure 3 is a schematic diagram of the disassembled structure of a battery cell in one embodiment of this application.

[0026] Figure 4 is a schematic diagram of the structure of the second insulating element of the battery in one embodiment of this application.

[0027] Figure 5 is a schematic diagram of the battery structure in another embodiment of this application.

[0028] Figure 6 is a schematic diagram of the battery circuit board assembly separated from the top wall in another embodiment of this application.

[0029] Figure 7 is a schematic diagram of the disassembled structure of the battery cell in another embodiment of this application.

[0030] Figure 8 is a schematic diagram of the battery structure in another embodiment of this application.

[0031] Figure 9 is a schematic diagram of the battery circuit board assembly separated from the top wall in another embodiment of this application.

[0032] Figure 10 is a schematic diagram of the disassembled structure of a battery cell in another embodiment of this application.

[0033] Figure 11 is a schematic diagram of the battery structure in another embodiment of this application.

[0034] Figure 12 is a schematic diagram of a battery circuit board assembly separated from the top wall in another embodiment of this application.

[0035] Figure 13 is a schematic diagram of the battery structure in another embodiment of this application.

[0036] Figure 14 is a schematic diagram of a battery circuit board assembly separated from the top wall in another embodiment of this application.

[0037] Figure 15 is a schematic diagram of the structure of a terminal device in one embodiment of this application.

[0038] Explanation of main component symbols

[0039] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application.

[0040] Batteries 100A, 100B, 100C, 100D, 100E

[0041] Terminal device 200

[0042] Battery Cell 10

[0043] Electrode assembly 20

[0044] Electrode Group 21

[0045] Page 1, page 211

[0046] First body surface 211A

[0047] First concave surface 211B

[0048] First inner surface 2111

[0049] Second inner surface 2112

[0050] Second concave surface 211C

[0051] First pole ear 22

[0052] Second pole ear 23

[0053] Casing 30

[0054] First recess 30A

[0055] First Wall 301

[0056] Second Wall 302

[0057] Third Wall 303

[0058] First transition wall 304

[0059] Fourth Wall 305

[0060] Fifth Wall 306

[0061] Sixth Wall 307

[0062] Seventh Wall 308

[0063] First Body 30B

[0064] First storage space 30C

[0065] First sidewall 31

[0066] Second sidewall 32

[0067] Third side wall 33

[0068] Second opening 331

[0069] Fourth sidewall 34

[0070] Fifth side wall 35

[0071] First opening 351

[0072] Second recess 30D

[0073] First inner wall 30D1

[0074] Second inner wall 30D2

[0075] Second accommodating space 30E

[0076] Sixth lateral wall 36

[0077] 40 pole

[0078] Circuit board assembly 50

[0079] Protection board 51

[0080] Protrusion 51A

[0081] Substrate 511

[0082] Flexible circuit board 512

[0083] First adapter 52

[0084] Part 1, 521

[0085] First Edge 521A

[0086] Second Edge 521B

[0087] Part 2, 522

[0088] First connecting part 523

[0089] Part 3, Chapter 524

[0090] Part 4, Chapter 525

[0091] Part 5, Chapter 526

[0092] Part 6, Chapter 527

[0093] Second connecting part 528

[0094] Second adapter 53

[0095] Area 1, 53A

[0096] Area 2, 53B

[0097] First extension 531

[0098] Second extension 532

[0099] First bend 533

[0100] Third Extension 534

[0101] Fourth extension 535

[0102] Second bend 536

[0103] First insulating component 60

[0104] First insulating part 61

[0105] Second insulating part 62

[0106] Third insulation section 63

[0107] Fourth Insulation Part 64

[0108] Fifth Insulation Part 65

[0109] Second insulating component 70

[0110] Connector 70A

[0111] First sub-connector 701

[0112] Second sub-connector 702

[0113] First connection area 71

[0114] Second connection area 72

[0115] Third connection area 73

[0116] Fourth connection area 74

[0117] First direction X

[0118] Second direction Y

[0119] Third direction Z Detailed Implementation

[0120] 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.

[0121] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be components positioned in between. When a component is considered to be "set" on another component, it can be directly set on the other component or there may be components positioned in between. It should be understood that, considering the factors of actual machining tolerances, in the technical solution of this application, when two components are set parallel / perpendicularly, they are set in the same direction, and there may be a certain angle between the two components. The angle between the two components is allowed to have a tolerance of 0-±10%.

[0122] When one value is considered "equal" to another, it means that they are equal within a set deviation range, which is within 10%. In other words, if at least one of the two values ​​fluctuates within the set deviation range, they are considered approximately equal even if their values ​​are not equal. Similarly, when one value is considered to have a "1:1" ratio with another, it means that they are equal within a set deviation range, which is within 10%. Again, if at least one of the two values ​​fluctuates within the set deviation range, they are considered equal in ratio even if their values ​​are not equal.

[0123] 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 in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. The term "overlap" as used herein refers to the overlapping of the projected portions of two components or the coincidence of the projected portions of two components.

[0124] One embodiment of this application provides a battery, which includes a battery cell. The battery cell includes an electrode assembly, a housing, and terminals. The electrode assembly is disposed within the housing, and the housing is electrically connected to the electrode assembly, and the housing has a first polarity. The housing includes a first sidewall, a second sidewall, a third sidewall, a fourth sidewall, a fifth sidewall, and a sixth sidewall. The first sidewall and the second sidewall are disposed opposite each other along a first direction, the third sidewall and the fourth sidewall are disposed opposite each other along a second direction, and the fifth sidewall and the sixth sidewall are disposed opposite each other along a third direction. The first direction is the thickness direction of the battery cell, the second direction is the width direction of the battery cell, and the third direction is the length direction of the battery cell. The first sidewall has a first recess and a first body, the first recess being recessed relative to the first body along the first direction to form a first accommodating space; or the third sidewall has a first recess and a first body, the first recess being recessed relative to the first body along the second direction to form a first accommodating space; or the fifth sidewall has a first recess and a first body, the first recess being recessed relative to the first body along the third direction to form a first accommodating space. The electrode post is connected to and insulated from the first recess. One end of the electrode post is electrically connected to the electrode assembly and has a second polarity. The other end of the electrode post extends into the first accommodating space. The first polarity and the second polarity are different.

[0125] In the aforementioned battery, a first sidewall has a first recess and a first body, the first recess being recessed relative to the first body along a first direction to form a first accommodating space; or a third sidewall has a first recess and a first body, the first recess being recessed relative to the first body along a second direction to form a first accommodating space; or a fifth sidewall has a first recess and a first body, the first recess being recessed relative to the first body along a third direction to form a first accommodating space. One end of the electrode post is electrically connected to the electrode assembly, and the other end of the electrode post extends into the first accommodating space. Compared with the existing method of the electrode post protruding from the top wall of the casing, the size of the electrode post stacked on the fifth sidewall can be reduced, which is beneficial to reducing the battery packaging length and thus improving the battery energy density.

[0126] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0127] Example 1

[0128] Please refer to Figure 1. An embodiment of this application provides a battery 100A. The battery 100A may be, but is not limited to, a secondary battery. A secondary battery is a battery that can be used again after being discharged by recharging to activate the active materials.

[0129] Please refer to Figures 2 and 3 together. The battery 100A includes a cell 10, which includes an electrode assembly 20, a housing 30, and terminals 40. The electrode assembly 20 is disposed within the housing 30. The electrode assembly 20 is used to convert chemical energy into electrical energy. The housing 30 is made of a metallic material and has electrical conductivity. The metallic element of the material includes at least one selected from Mg, Al, Zn, Fe, Sn, Cu, Ag, Pt, Au, Mn, Cr, and Ni. The housing 30 is electrically connected to the electrode assembly 20, and the housing 30 has a first polarity.

[0130] The housing 30 includes a first sidewall 31, a second sidewall 32, a third sidewall 33, a fourth sidewall 34, a fifth sidewall 35, and a sixth sidewall 36. The first sidewall 31 and the second sidewall 32 are arranged opposite each other along a first direction X, the third sidewall 33 and the fourth sidewall 34 are arranged opposite each other along a second direction Y, and the fifth sidewall 35 and the sixth sidewall 36 are arranged opposite each other along a third direction Z. The first sidewall 31, the second sidewall 32, the third sidewall 33, the fourth sidewall 34, the fifth sidewall 35, and the sixth sidewall 36 enclose a space for accommodating the electrode assembly 20.

[0131] Wherein, the first direction X is the thickness direction of the cell 10, the second direction Y is the width direction of the cell 10, and the third direction Z is the length direction of the cell 10.

[0132] Please refer to Figure 2. The first sidewall 31 is provided with a first recess 30A and a first body 30B. The first recess 30A is recessed relative to the first body 30B along a first direction X to form a first accommodating space 30C. The electrode post 40 is connected to the first recess 30A and is insulated from the first recess 30A. One end of the electrode post 40 is electrically connected to the electrode assembly 20 and has a second polarity. The other end of the electrode post 40 extends into the first accommodating space 30C.

[0133] When viewed along the first direction X, the pole post 40 does not extend beyond the first recess 30A; when viewed along the second direction Y, the pole post 40 does not extend beyond the first recess 30A; when viewed along the third direction Z, the pole post 40 does not extend beyond the first recess 30A, so as to reduce the space waste caused by the pole post 40 protruding from the first accommodating space 30C.

[0134] Optionally, the pole post 40 extends into the first accommodating space 30C along the first direction X; or the pole post 40 extends into the first accommodating space 30C in a direction inclined relative to the first direction X.

[0135] The first polarity is different from the second polarity so that the housing 30 and the terminal 40 can form a complete current loop with the external circuit. Optionally, the housing 30 has a negative polarity and the terminal 40 has a positive polarity; or the housing 30 has a positive polarity and the terminal 40 has a negative polarity.

[0136] In the aforementioned battery 100A, the first sidewall 31 is provided with a first recess 30A and a first body 30B. The first recess 30A is recessed relative to the first body 30B along a first direction X to form a first accommodating space 30C. One end of the electrode post 40 is electrically connected to the electrode assembly 20, and the other end of the electrode post 40 extends into the first accommodating space 30C. Compared with the existing method of the electrode post protruding from the top wall of the housing, the size of the electrode post 40 stacked on the fifth sidewall 35 can be reduced, which is beneficial to reducing the packaging length of the battery 100A and thus improving the energy density of the battery 100A.

[0137] Referring to Figures 1 and 2, in some embodiments, the fifth sidewall 35 has a first polarity. The battery 100A also includes a circuit board assembly 50, which includes a protection plate 51, a first adapter 52, and a second adapter 53. The protection plate 51 is disposed on the side of the fifth sidewall 35 away from the electrode assembly 20. The fifth sidewall 35 has a first opening 351 communicating with the first accommodating space 30C. One end of the first adapter 52 extends from the first opening 351 into the first accommodating space 30C and connects to the terminal post 40; the other end of the first adapter 52 connects to the protection plate 51. The second adapter 53 connects the fifth sidewall 35 and the protection plate 51. The protection plate 51 is electrically connected to the battery cell 10 via the first adapter 52 and the second adapter 53. The protection plate 51 has a protection circuit, which may, but is not limited to, provide overcharge, over-discharge, overcurrent, short circuit, and anti-counterfeiting protection functions for the battery cell 10.

[0138] In some embodiments, the third sidewall 33 is provided with a second opening 331 communicating with the first accommodating space 30C, and the first recess 30A is located at a corner of the housing 30 adjacent to the fifth sidewall 35, so that the position of the first recess 30A is adapted to the position of the first adapter 52.

[0139] Referring to Figure 3, in some embodiments, the electrode assembly 20 includes an electrode group 21, a first tab 22, and a second tab 23. The electrode group 11 includes a positive electrode, a separator, and a negative electrode arranged sequentially. Optionally, the positive electrode, the separator, and the negative electrode are in a stacked structure. The first tab 22 has a second polarity, and the second tab 23 has a first polarity.

[0140] The electrode assembly 21 includes a first surface 211, which includes a first body surface 211A and a first concave surface 211B and a second concave surface 211C connected to both sides of the first body surface 211A along a second direction Y. The first body surface 211A is disposed opposite to the fifth sidewall 35 along a third direction Z, and the first concave surface 211B and the second concave surface 211C are respectively recessed relative to the first body surface 211A along a third direction Z.

[0141] The first recess 30A is located within the space formed by the first concave surface 211B. The first tab 22 extends from the first concave surface 211B and connects to the electrode post 40, so that the electrode post 40 is electrically connected to the electrode assembly 20 and has the same second polarity as the first tab 22. The second tab 23 extends from the second concave surface 211C and is electrically connected to the housing 30, so that the housing 30 is electrically connected to the electrode assembly 20 and has the same first polarity as the second tab 23. Compared with the existing method where a large space needs to be reserved between the end face of the electrode assembly and the top wall of the housing to accommodate the tab and part of the electrode post, the connection between the first tab 22 and the electrode post 40 shares the space in the second direction Y and the third direction Z with the electrode assembly 21, and the connection between the first tab 22 and the housing 30 shares the space in the second direction Y and the third direction Z with the electrode assembly 21, which is beneficial to improving the energy density of the battery 100A.

[0142] In some embodiments, the thickness direction of the first tab 22 is parallel to the first direction X, so that the first tab 22 can be accommodated between the first recess 30A and the second sidewall 32, and the risk of interference between the first tab 22 and the housing 30 is reduced, thereby improving the stability of the connection between the first tab 22 and the pole post 40.

[0143] Please continue referring to Figure 2. In some embodiments, the first recess 30A includes a first wall 301, a second wall 302, and a third wall 303. The first wall 301 and the second sidewall 32 are disposed opposite each other along a first direction X. The pole post 40 passes through the first wall 301 along the first direction X. The second wall 302 and the third wall 303 are connected between the first wall 301 and the first body 30B. Viewed along the first direction X, the second wall 302 is connected to the fifth sidewall 35 and extends toward the sixth sidewall 36. The third wall 303 is connected to the third sidewall 33 and extends toward the fourth sidewall 34. The second wall 302 is connected to the third wall 303 so that the shape of the first accommodating space 30C is adapted to the shape of the first adapter 52.

[0144] Viewed along the first direction X, the extended outlines of the second wall 302 and the third wall 303 are straight lines, arcs, or a combination of straight lines and arcs. Optionally, the second wall 302 extends along the third direction Z, and the third wall 303 extends along the second direction Y.

[0145] In some embodiments, the first recess 30A further includes a first transition wall 304, which connects the second wall 302 and the third wall 303. Viewed along the first direction X, the extended profile of the first transition wall 304 is an arc, and the axis of the arc extends along the first direction X to reduce the risk of stress concentration at the connection between the second wall 302 and the third wall 303.

[0146] Referring to Figure 3, in some embodiments, the first concave surface 211B includes a first inner surface 2111 and a second inner surface 2112. The first inner surface 2111 extends along a third direction Z, and the second inner surface 2112 extends along a second direction Y. The first inner surface 2111 is disposed opposite to the second wall 302 along the second direction Y, and the second inner surface 2112 is disposed opposite to the third wall 303 along the third direction Z. Optionally, the first tab 22 extends from the first inner surface 2111 along the second direction Y; or the first tab 22 extends from the second inner surface 2112 along the third direction Z.

[0147] Please refer to Figures 1 and 2 together. In some embodiments, the thickness direction of the protection plate 51 is perpendicular to the first direction X. The protection plate 51 and the fifth sidewall 35 are arranged opposite each other along the third direction Z to reduce the space occupied by the protection plate 51 in the third direction Z, which is beneficial to reduce the packaging length of the battery 100A and thus improve the energy density of the battery 100A.

[0148] In some embodiments, the first adapter 52 includes a first part 521, a second part 522, and a first connecting part 523. The first part 521 is disposed opposite to the first wall 301 along a first direction X and connected to the pole post 40. The second part 522 is disposed opposite to the protective plate 51 along a third direction Z and connected to the protective plate 51. The first connecting part 523 connects between the first part 521 and the second part 522. Specifically, the first part 521 is attached to the end face of the pole post 40, and / or the second part 522 is attached to the surface of the protective plate 51 facing the fifth side wall 35, so as to improve the stability of the first adapter 52 connected to the pole post 40 and the protective plate 51.

[0149] Optionally, the first part 521, the second part 522 and the first connecting part 523 are integrated into one unit.

[0150] In some embodiments, viewed along a first direction X, the first portion 521 includes a first edge 521A and a second edge 521B. The first edge 521A is spaced apart from the second wall 302 along a second direction Y, and the second edge 521B is spaced apart from the third wall 303 along a third direction Z, forming buffer gaps between the first edge 521A and the second wall 302, and between the second edge 521B and the third wall 303. This reduces the risk of short circuits caused by interference between the first portion 521 and the first recess 30A when the battery 100A is subjected to an external impact.

[0151] Please refer to Figures 1 and 2 together. In some embodiments, the second adapter 53 is flat and includes a first region 53A and a second region 53B arranged along the second direction Y. When viewed along the third direction Z, the first region 53A overlaps with the protective plate 51, and the second region 53B is located outside the protective plate 51, i.e., when viewed along the third direction Z, the second region 53B is separate from the protective plate 51. The first region 53A is connected to the surface of the protective plate 51 facing the fifth sidewall 35, and the second region 53B is connected to the fifth sidewall 35 to increase the connection area between the second adapter 53 and the protective plate 51 and the fifth sidewall 35, thereby facilitating the improvement of the stability of the second adapter 53 connected to the pole post 40 and the protective plate 51.

[0152] In some embodiments, the second region 53B is welded to the fifth sidewall 35, and the second tab 23 is welded to one of the first sidewall 31, the second sidewall 32, and the fourth sidewall 34, in order to reduce the risk of burn-through caused by welding the fifth sidewall 35 twice, which is beneficial to improving the safety performance of the battery 100A.

[0153] Referring to Figures 1 and 2, in some embodiments, the protective plate 51 includes a substrate 511 and a flexible circuit board 512 connected to the substrate 511. The substrate 511 and the fifth sidewall 35 are disposed opposite each other along the third direction Z. It should be noted that the thickness direction of the protective plate 51 is the thickness direction of the substrate 511. The first adapter 52 and the second adapter 53 are connected to the substrate 511. The flexible circuit board 512 is connected to the substrate 511, and at least a portion of the flexible circuit board 512 extends from the side of the substrate 511 away from the fifth sidewall 35. The end of the flexible circuit board 512 away from the substrate 511 is used to connect to the motherboard of an external terminal device or other external circuits.

[0154] In some embodiments, the flexible circuit board 512 extends from the side of the substrate 511 toward the fifth sidewall 35 after being bent to the side of the substrate 511 away from the fifth sidewall 35.

[0155] Optionally, the protection plate 51 is a rigid-soft composite plate.

[0156] Please refer to Figures 1 and 2 together. In some embodiments, the battery 100A also includes a first insulating member 60, at least a portion of which is located between the first adapter 52 and the housing 30, to improve the stability of the insulation between the first adapter 52 and the housing 30.

[0157] In some embodiments, the first insulating member 60 is formed by curing an insulating adhesive applied to the housing 30. The first insulating member 60 includes a first insulating portion 61, a second insulating portion 62, and a third insulating portion 63. The first insulating portion 61 is disposed in the first recess 30A and located on the periphery of the pole post 40, so as to play an insulating and buffering role in the first recess 30A, reducing the risk of short circuit caused by interference between the first adapter 52 and the first recess 30A. Specifically, the first insulating portion 61 covers the first wall 301, the second wall 302, and the third wall 303. The second insulating portion 62 is disposed between the protective plate 51 and the fifth side wall 35 to improve the insulation stability between the protective plate 51 and the fifth side wall 35. The third insulating portion 63 is disposed between the first adapter 52 and the fifth side wall 35 to improve the insulation stability between the first adapter 52 and the fifth side wall 35.

[0158] Optionally, the first insulating element 60 is a pre-made insulating adhesive paper.

[0159] Referring to Figures 1 and 4, in some embodiments, the battery 100A further includes a second insulating member 70 extending from the side of the protective plate 51 away from the fifth sidewall 35 to the first sidewall 31 and the second sidewall 32 to improve the stability of the circuit board assembly 50 on the fifth sidewall 35. The second insulating member 70 also covers the first accommodating space 30C to protect the terminal post 40 and the first adapter 52 located in the first accommodating space 30C.

[0160] In some embodiments, the second insulating member 70 is provided with a communication port 70A, from which the flexible circuit board 512 extends to facilitate connection of the flexible circuit board 512 to the motherboard of an external terminal device or other external circuits.

[0161] In some embodiments, the second insulating member 70 includes a first connecting region 71, a second connecting region 72, a third connecting region 73, and a fourth connecting region 74. The first connecting region 71 is connected to the side of the substrate 511 away from the fifth sidewall 35 and covers the first opening 351. The second connecting region 72 connects the first connecting region 71 and the first body 30B and covers the first recess 30A. The third connecting region 73 connects the first connecting region 71 and the second sidewall 32. The fourth connecting region 74 connects the first connecting region 71 and the third sidewall 33 and covers the second opening 331. The first connecting region 71, the second connecting region 72, and the fourth connecting region 74 cooperate to cover the first accommodating space 30C.

[0162] In some embodiments, the communication port 70A includes a first sub-communication port 701 and a second sub-communication port 702. The first sub-communication port 701 is formed on the first connection region 71, and the second sub-communication port 702 is formed on the second connection region 72. The first sub-communication port 701 and the second sub-communication port 702 are interconnected. The first connection region 71 includes a first sub-connection region 711 and a second sub-connection region 712 arranged along the second direction Y. The first sub-communication port 701 is located between the first sub-connection region 711 and the second connection region 712. The first sub-connection region 711 covers the substrate 511, and the second connection region 712 covers the first opening 351.

[0163] Optionally, the second insulating element 70 is adhesive tape.

[0164] Example 2

[0165] Please refer to Figures 5 and 6 together. One embodiment of this application also provides a battery 100B. The difference between battery 100B and battery 100A lies in the different locations of the first recess 30A and the first body 30B on the housing 30, as well as the different structures of the corresponding circuit board assembly 50.

[0166] The third sidewall 33 is provided with a first recess 30A and a first body 30B. The first recess 30A is recessed relative to the first body 30B along the second direction Y to form a first accommodating space 30C. An electrode post 40 is connected to the first recess 30A and is insulated from the first recess 30A. One end of the electrode post 40 is electrically connected to the electrode assembly 20 and has a second polarity. The other end of the electrode post 40 extends into the first accommodating space 30C.

[0167] When viewed along the first direction X, the pole post 40 does not extend beyond the first recess 30A; when viewed along the second direction Y, the pole post 40 does not extend beyond the first recess 30A; when viewed along the third direction Z, the pole post 40 does not extend beyond the first recess 30A, so as to reduce the space waste caused by the pole post 40 protruding from the first accommodating space 30C.

[0168] Optionally, the pole post 40 extends into the first accommodating space 30C along the second direction Y; or the pole post 40 extends into the first accommodating space 30C in a direction inclined relative to the second direction Y.

[0169] In the aforementioned battery 100B, the third sidewall 33 is provided with a first recess 30A and a first body 30B. The first recess 30A is recessed relative to the first body 30B along the second direction Y to form a first accommodating space 30C. One end of the electrode post 40 is electrically connected to the electrode assembly 20, and the other end of the electrode post 40 extends into the first accommodating space 30C. Compared with the existing method of the electrode post protruding from the top wall of the housing, the size of the electrode post 40 stacked on the fifth sidewall 35 can be reduced, which is beneficial to reducing the packaging length of the battery 100B and thus improving the energy density of the battery 100B.

[0170] Referring to Figure 6, in some embodiments, the first recess 30A includes a fourth wall 305 and a fifth wall 306. Viewed along the first direction X, the fourth wall 305 connects to the fifth sidewall 35 and extends toward the sixth sidewall 36, while the fifth wall 306 connects to the first body 30B and extends toward the fourth sidewall 34. The fourth wall 305 connects to the fifth wall 306 so that the shape of the first accommodating space 30C matches the shape of the first adapter 52. The pole post 40 passes through the fourth wall 305 along the second direction Y.

[0171] In some embodiments, when viewed along the first direction X, the fourth wall 305 extends along the third direction Z, and the fifth wall 306 extends along the second direction Y. The length of the fourth wall 305 extending along the third direction Z is L1, and the length of the fifth wall 306 extending along the second direction Y is L2, where L1 > L2, so that the first accommodating space 30C is adapted to the extension direction of the pole post 40, and the space occupied by the first recess 30A in the second direction Y is reduced.

[0172] In some embodiments, the thickness direction of the protective plate 51 is perpendicular to the first direction X, and the protective plate 51 and the fifth sidewall 35 are disposed opposite each other along the third direction Z, so as to reduce the space occupied by the protective plate 51 in the third direction Z, which is beneficial to reduce the packaging length of the battery 100B and thereby improve the energy density of the battery 100B.

[0173] In some embodiments, the first adapter 52 is an "L"-shaped connecting piece. The first adapter 52 includes a third part 524 and a fourth part 525. The third part 524 is disposed opposite to the fourth wall 305 along the second direction Y and connected to the pole post 40, and the fourth part 525 is disposed opposite to the protective plate 51 along the third direction Z and connected to the protective plate 51. The third part 524 connects to the fourth part 525. Specifically, the third part 524 is attached to the end face of the pole post 40, and / or the fourth part 525 is attached to the surface of the protective plate 51 facing the fifth side wall 35, so as to improve the stability of the first adapter 52 connected to the pole post 40 and the protective plate 51.

[0174] Optionally, the third part 524 and the fourth part 525 are set together as a single unit.

[0175] In some embodiments, the first insulating member 60 includes a fourth insulating portion 64 and a fifth insulating portion 65. The fourth insulating portion 64 is disposed in the first recess 30A and located on the periphery of the pole post 40, so as to play an insulating and buffering role in the first recess 30A, reducing the risk of short circuit caused by interference between the first adapter 52 and the first recess 30A. Specifically, the first insulating portion 61 covers the fourth wall 305 and the fifth wall 306. The fifth insulating portion 65 is disposed between the protective plate 51 and the fifth side wall 35 to improve the insulation stability between the protective plate 51 and the fifth side wall 35.

[0176] Referring to Figure 7, in some embodiments, the first concave surface 211B includes a first inner surface 2111 and a second inner surface 2112. The first inner surface 2111 extends along a third direction Z, and the second inner surface 2112 extends along a second direction Y. The first inner surface 2111 is disposed opposite to the fourth wall 305 along the second direction Y, and the second inner surface 2112 is disposed opposite to the fifth wall 306 along the third direction Z. A first electrode tab 22 extends from the first inner surface 2111 along the second direction Y, and one end of the first electrode tab 22 away from the first inner surface 2111 is connected to the electrode post 40. Optionally, the end of the first electrode tab 22 away from the first inner surface 2111 is bent and disposed opposite to the fourth wall 305 along the second direction Y, so as to improve the stability of the connection between the first electrode tab 22 and the electrode post 40.

[0177] Apart from the differences mentioned above, the parameters of battery 100B and battery 100A are roughly the same. Please refer to the description of battery 100A above.

[0178] Example 3

[0179] Please refer to Figures 8 and 9 together. One embodiment of this application also provides a battery 100C. The difference between battery 100C and battery 100A lies in the different locations of the first recess 30A and the first body 30B on the housing 30, as well as the different structures of the corresponding circuit board assembly 50.

[0180] The fifth sidewall 35 is provided with a first recess 30A and a first body 30B. The first recess 30A is recessed relative to the first body 30B along a third direction Z to form a first accommodating space 30C. An electrode post 40 is connected to the first recess 30A and is insulated from the first recess 30A. One end of the electrode post 40 is electrically connected to the electrode assembly 20 and has a second polarity. The other end of the electrode post 40 extends into the first accommodating space 30C.

[0181] When viewed along the first direction X, the pole post 40 does not extend beyond the first recess 30A; when viewed along the second direction Y, the pole post 40 does not extend beyond the first recess 30A; when viewed along the third direction Z, the pole post 40 does not extend beyond the first recess 30A, so as to reduce the space waste caused by the pole post 40 protruding from the first accommodating space 30C.

[0182] Optionally, the pole post 40 extends into the first accommodating space 30C along the third direction Z; or the pole post 40 extends into the first accommodating space 30C in a direction inclined relative to the third direction Z.

[0183] In the aforementioned battery 100C, the fifth sidewall 35 is provided with a first recess 30A and a first body 30B. The first recess 30A is recessed relative to the first body 30B along a third direction Z to form a first accommodating space 30C. One end of the electrode post 40 is electrically connected to the electrode assembly 20, and the other end of the electrode post 40 extends into the first accommodating space 30C. Compared with the existing method of the electrode post protruding from the top wall of the housing, the size of the electrode post 40 stacked on the fifth sidewall 35 can be reduced, which is beneficial to reducing the packaging length of the battery 100C and thus improving the energy density of the battery 100C.

[0184] Referring to Figure 9, in some embodiments, the first recess 30A includes a sixth wall 307 and a seventh wall 308. Viewed along the first direction X, the sixth wall 307 connects to the first body 30B and extends toward the sixth side wall 36, while the seventh wall 308 connects to the third side wall 33 and extends toward the fourth side wall 34. The connection between the sixth wall 307 and the seventh wall 308 allows the shape of the first accommodating space 30C to conform to the shape of the first adapter 52. The pole post 40 passes through the seventh wall 308 along the third direction Z.

[0185] In some embodiments, when viewed along the first direction X, the sixth wall 307 extends along the third direction Z, and the seventh wall 308 extends along the second direction Y. The length of the sixth wall 307 extending along the third direction Z is L3, and the length of the seventh wall 308 extending along the second direction Y is L4, where L3 < L4, so that the first accommodating space 30C is adapted to the extension direction of the pole post 40, and the space occupied by the first recess 30A in the third direction Z is reduced.

[0186] In some embodiments, the thickness direction of the protection plate 51 is perpendicular to the first direction X, and the protection plate 51 and the first body 30B are disposed opposite each other along the third direction Z, so as to reduce the space occupied by the protection plate 51 in the third direction Z, which is beneficial to reduce the packaging length of the battery 100C and thereby improve the energy density of the battery 100C.

[0187] In some embodiments, the first adapter 52 includes a fifth portion 526, a sixth portion 527, and a second connecting portion 528. The fifth portion 526 is disposed opposite to the seventh wall 308 along the third direction Z and connected to the pole post 40. The sixth portion 527 is disposed opposite to the protective plate 51 along the third direction Z and connected to the protective plate 51. The second connecting portion 528 connects between the fifth portion 526 and the sixth portion 527. Specifically, the fifth portion 526 is fitted to the end face of the pole post 40, and / or the sixth portion 527 is fitted to the surface of the protective plate 51 facing the first body 30B, so as to improve the stability of the first adapter 52 connected to the pole post 40 and the protective plate 51.

[0188] Optionally, the fifth part 526, the sixth part 527, and the second connecting part 528 are integrated.

[0189] In some embodiments, the first insulating member 60 includes a sixth insulating portion 66 and a seventh insulating portion 67. The sixth insulating portion 66 is disposed in the first recess 30A and located on the periphery of the pole post 40, so as to play an insulating and buffering role in the first recess 30A, reducing the risk of short circuit caused by interference between the first adapter 52 and the first recess 30A. Specifically, the first insulating portion 61 covers the sixth wall 307 and the seventh wall 308. The seventh insulating portion 67 is disposed between the protective plate 51 and the first body 30B to improve the insulation stability between the protective plate 51 and the first body 30B.

[0190] Referring to Figure 10, in some embodiments, the first concave surface 211B includes a first inner surface 2111 and a second inner surface 2112. The first inner surface 2111 extends along a third direction Z, and the second inner surface 2112 extends along a second direction Y. The first inner surface 2111 is disposed opposite to the sixth wall 307 along the second direction Y, and the second inner surface 2112 is disposed opposite to the seventh wall 308 along a third direction Z. A first electrode tab 22 extends from the second inner surface 2112 along a third direction Z, and one end of the first electrode tab 22 away from the second inner surface 2112 is connected to the electrode post 40. Optionally, the end of the first electrode tab 22 away from the second inner surface 2112 is bent and disposed opposite to the seventh wall 308 along a third direction Z, so as to improve the stability of the connection between the first electrode tab 22 and the electrode post 40.

[0191] Apart from the differences mentioned above, the parameters of battery 100C and battery 100A are roughly the same. Please refer to the description of battery 100A above.

[0192] Example 4

[0193] Please refer to Figures 11 and 12 together. One embodiment of this application also provides a battery 100D. The difference between battery 100D and battery 100C is that the fifth sidewall 35 is further provided with a second recess 30D and the corresponding second adapter 53 have different structures.

[0194] The second recess 30D is recessed relative to the first body 30B along the third direction Z to form a second accommodating space 30E. The second recess 30D and the first recess 30A are located at opposite ends of the first body 30B along the second direction Y. One end of the second adapter 53 is connected to the protective plate 51, and the other end of the second adapter 53 extends into the second accommodating space 30E and is welded to the second recess 30D.

[0195] The second recess 30D is located in the space formed by the second concave surface 211C. The second tab 23 extends from the second concave surface 211C and is welded to one of the first sidewall 31, the second sidewall 32 and the fourth sidewall 34 to reduce the risk of the fifth sidewall 35 being welded twice and thus improve the safety performance of the battery 100D.

[0196] In some embodiments, the second recess 30D includes a first inner wall 30D1 and a second inner wall 30D2. The first inner wall 30D1 is connected to the first body 30B and extends toward the sixth side wall 36. The second inner wall 30D2 is connected to the fourth side wall 34 and extends toward the third side wall 33. The first inner wall 30D1 is connected to the second inner wall 30D2 so that the shape of the second accommodating space 30E is adapted to the shape of the second adapter 53. The second inner wall 30D2 is connected to the second adapter 53 to increase the connection area between the second adapter 53 and the protective plate 51 and the fifth side wall 35, thereby facilitating the improvement of the stability of the second adapter 53 connected to the pole post 40 and the protective plate 51.

[0197] In some embodiments, when viewed along the third direction Z, the protective plate 51 is separated from the second inner wall 30D2, so as to reduce the risk of interference between the protective plate 51 and the welding tool when the second inner wall 30D2 is welded to the second adapter 53.

[0198] The second adapter 53 includes a first extension 531, a second extension 532, and a first bending portion 533. The first extension 531 is disposed opposite to and welded to the second inner wall 30D2 along a third direction Z. The second extension 532 is disposed opposite to and connected to the protective plate 51 along a third direction Z. The first bending portion 533 is disposed opposite to and connected between the first extension 531 and the second extension 532 along a second direction Y. Specifically, the first extension 531 is attached to the second inner wall 30D2, and / or the second extension 532 is attached to the surface of the protective plate 51 facing the first body 30B, so as to improve the stability of the second adapter 53 connected to the second recess 30D and the protective plate 51.

[0199] Optionally, the first extension 531, the second extension 532, and the first bending portion 533 are integrally formed.

[0200] Apart from the differences mentioned above, the parameters of battery 100D and battery 100C are roughly the same, and can be found in the description of battery 100A above.

[0201] Example 5

[0202] Please refer to Figures 13 and 14 together. One embodiment of this application also provides a battery 100E. The difference between battery 100E and battery 100D lies in the fact that the protection plate 51 has a portion that overlaps with the second inner wall 30D2 and the structure of the corresponding second adapter 53 is different.

[0203] The protective plate 51 includes a protrusion 51A. When viewed along the third direction Z, the protrusion 51A overlaps with the second inner wall 30D2 to increase the fabric space of the protective plate 51.

[0204] The second adapter 53 includes a third extension 534, a fourth extension 535, and a second bending portion 536. The third extension 534 is disposed opposite to and welded to the second inner wall 30D2 along the third direction Z. The fourth extension 535 is disposed opposite to and connected to the protrusion 51A along the third direction Z. The third extension 534 is disposed opposite to the fourth extension 535 along the third direction Z. The second bending portion 536 connects between the third extension 534 and the fourth extension 535. Specifically, the third extension 534 is fitted to the second inner wall 30D2, and / or the fourth extension 535 is fitted to the surface of the protrusion 51A facing the second inner wall 30D2, so as to improve the stability of the second adapter 53 connected to the second recess 30D and the protective plate 51.

[0205] In some embodiments, when viewed along the third direction Z, the third extension 534 and the fourth extension 535 are located within the second inner wall 30D2, and when viewed along the second direction Y, the third extension 534 and the fourth extension 535 are located within the first inner wall 30D1, so as to reduce the space waste caused by the second adapter 53 protruding from the second accommodating space 30E, which is beneficial to reduce the packaging length of the battery 100E and thereby improve the energy density of the battery 100E.

[0206] Optionally, the third extension 534, the fourth extension 535, and the second bending portion 536 are integrally formed.

[0207] Apart from the differences mentioned above, the parameters of battery 100E and battery 100D are roughly the same. Please refer to the description of battery 100D above.

[0208] Please refer to Figure 15. An embodiment of this application also provides a terminal device 200, including the battery (100A, 100B, 100C, 100D, 100E) in any of the above embodiments.

[0209] Optionally, the terminal device 200 may be a vehicle, mobile phone, portable device, laptop computer, ship, spacecraft, electric toy, and power tool, etc.

[0210] In summary, in the aforementioned batteries (100A, 100B, 100C, 100D, 100E) and terminal device 200, the first sidewall 31 is provided with a first recess 30A and a first body 30B, the first recess 30A being recessed relative to the first body 30B along a first direction X to form a first accommodating space 30C; or the third sidewall 33 is provided with a first recess 30A and a first body 30B, the first recess 30A being recessed relative to the first body 30B along a second direction Y to form a first accommodating space 30C; or the fifth sidewall 35 is provided with a first recess 30A and a first body 30B, the first recess 30A being recessed relative to the first body 30B along a third direction Z to form a first accommodating space 30C. One end of the electrode post 40 is electrically connected to the electrode assembly 20, and the other end of the electrode post 40 extends into the first accommodating space 30C. Compared with the existing method of the terminal post protruding from the top wall of the housing, it can reduce the size of the terminal post 40 superimposed on the fifth side wall 35, which is beneficial to reduce the packaging length of the battery 100A and thus improve the energy density of the battery 100A.

[0211] In addition, those skilled in the art may make other changes within the spirit of this application. Of course, all such changes made in accordance with the spirit of this application should be included within the scope disclosed in this application.

Claims

1. A battery, characterized in that, The battery includes a cell, the cell includes an electrode assembly, a housing and terminals, the electrode assembly is disposed inside the housing, the housing is electrically connected to the electrode assembly, and the housing has a first polarity; The housing includes a first sidewall, a second sidewall, a third sidewall, a fourth sidewall, a fifth sidewall, and a sixth sidewall. The first sidewall and the second sidewall are arranged opposite each other along a first direction, the third sidewall and the fourth sidewall are arranged opposite each other along a second direction, and the fifth sidewall and the sixth sidewall are arranged opposite each other along a third direction. The first direction is the thickness direction of the battery cell, the second direction is the width direction of the battery cell, and the third direction is the length direction of the battery cell. The first sidewall is provided with a first recess and a first body, the first recess being recessed relative to the first body along the first direction to form a first accommodating space, or, The third sidewall is provided with a first recess and a first body, the first recess being recessed relative to the first body along the second direction to form a first accommodating space, or... The fifth sidewall is provided with a first recess and a first body, the first recess being recessed relative to the first body along the third direction to form a first accommodating space; The electrode post is connected to the first recess and is insulated from the first recess. One end of the electrode post is electrically connected to the electrode assembly and has a second polarity. The other end of the electrode post extends into the first accommodating space. The first polarity is different from the second polarity.

2. The battery as described in claim 1, characterized in that, The fifth sidewall has the first polarity. The battery also includes a circuit board assembly, which includes a protection plate, a first adapter, and a second adapter. The protection plate is disposed on the side of the fifth sidewall away from the electrode assembly. The fifth sidewall has a first opening communicating with the first accommodating space. One end of the first adapter extends into the first accommodating space from the first opening and is connected to the electrode post. The other end of the first adapter is connected to the protection plate. The second adapter connects the fifth sidewall and the protection plate.

3. The battery as described in claim 2, characterized in that, The electrode assembly includes an electrode group, a first electrode tab, and a second electrode tab. The polarity of the first electrode tab is opposite to that of the second electrode tab. The electrode group includes a first surface, which includes a first body surface and a first concave surface and a second concave surface connected to both sides of the first body surface along the second direction. The first body surface and the fifth sidewall are disposed opposite each other along the third direction. The first concave surface and the second concave surface are respectively recessed relative to the first body surface along the third direction. The first recess is located within the space formed by the first concave surface, the first electrode tab extends from the first concave surface and is connected to the electrode post, and the second electrode tab extends from the second concave surface and is electrically connected to the housing.

4. The battery as described in claim 2, characterized in that, The first sidewall is provided with a first recess and a first body, the first recess being recessed relative to the first body along the first direction to form a first accommodating space; The first recess includes a first wall, a second wall, and a third wall. The first wall and the second side wall are arranged opposite each other along the first direction. The pole passes through the first wall along the first direction. The second wall and the third wall are connected between the first wall and the first body. When viewed along the first direction, the second wall is connected to the fifth side wall and extends toward the sixth side wall. The third wall is connected to the third side wall and extends toward the fourth side wall. The second wall is connected to the third wall.

5. The battery as described in claim 4, characterized in that, The thickness direction of the protective plate is perpendicular to the first direction, and the protective plate and the fifth sidewall are arranged opposite each other along the third direction; The first adapter includes a first part, a second part, and a first connecting part. The first part is disposed opposite to the first wall along the first direction and connected to the pole post. The second part is disposed opposite to the protection plate along the third direction and connected to the protection plate. The first connecting part is connected between the first part and the second part.

6. The battery as described in claim 2, characterized in that, The third sidewall is provided with a first recess and a first body, the first recess being recessed relative to the first body along the second direction to form a first accommodating space; The first recess includes a fourth wall and a fifth wall. When viewed along the first direction, the fourth wall is connected to the fifth side wall and extends toward the sixth side wall. The fifth wall is connected to the first body and extends toward the fourth side wall. The fourth wall is connected to the fifth wall. The pole passes through the fourth wall along the second direction.

7. The battery as described in claim 6, characterized in that, The thickness direction of the protective plate is perpendicular to the first direction, and the protective plate and the fifth sidewall are arranged opposite each other along the third direction; The first adapter includes a third part and a fourth part. The third part and the fourth wall are disposed opposite to each other along the second direction and connected to the pole post. The fourth part and the protective plate are disposed opposite to each other along the third direction and connected to the protective plate. The third part is connected to the fourth part.

8. The battery as described in claim 3, characterized in that, The fifth sidewall is provided with a first recess and a first body, the first recess being recessed relative to the first body along the third direction to form a first accommodating space; The first recess includes a sixth wall and a seventh wall. When viewed along the first direction, the sixth wall is connected to the first body and extends toward the sixth side wall, the seventh wall is connected to the third side wall and extends toward the fourth side wall, the sixth wall is connected to the seventh wall, and the pole passes through the seventh wall along the third direction.

9. The battery as claimed in claim 8, characterized in that, The thickness direction of the protective plate is perpendicular to the first direction, and the protective plate and the first body are disposed opposite to each other along the third direction; The first adapter includes a fifth part, a sixth part, and a second connecting part. The fifth part and the seventh wall are disposed opposite to each other along the third direction and connected to the pole post. The sixth part and the protective plate are disposed opposite to each other along the third direction and connected to the protective plate. The second connecting part is connected between the fifth part and the sixth part.

10. The battery as claimed in claim 8 or 9, characterized in that, The fifth sidewall is also provided with a second recess, which is recessed relative to the first body along the third direction to form a second accommodating space. The second recess and the first recess are located at both ends of the first body along the second direction. The second recess is located in the space formed by the second concave surface. The second electrode extends from the second concave surface and is welded to one of the first sidewall, the second sidewall and the fourth sidewall. One end of the second adapter is connected to the protective plate, and the other end of the second adapter extends into the second accommodating space and is welded to the second recess.

11. The battery as claimed in claim 10, characterized in that, The second recess includes a first inner wall and a second inner wall. The first inner wall is connected to the first body and extends toward the sixth side wall. The second inner wall is connected to the fourth side wall and extends toward the third side wall. The first inner wall is connected to the second inner wall, and the second inner wall is connected to the second adapter.

12. The battery as claimed in claim 11, characterized in that, Viewed along the third direction, the protective plate is separated from the second inner wall; The second adapter includes a first extension, a second extension, and a first bend. The first extension is disposed opposite to and welded to the second inner wall along the third direction. The second extension is disposed opposite to and connected to the protective plate along the third direction. The first bend is disposed opposite to and connected between the first extension and the second extension along the second direction.

13. The battery as claimed in claim 11, characterized in that, The protective plate includes a protruding portion, which overlaps with the second inner wall when viewed along the third direction. The second adapter includes a third extension, a fourth extension, and a second bend. The third extension is disposed opposite to and welded to the second inner wall along the third direction. The fourth extension is disposed opposite to and connected to the protruding part along the third direction. The third extension is disposed opposite to the fourth extension along the third direction. The second bend is connected between the third extension and the fourth extension. When viewed along the third direction, the third extension and the fourth extension are located inside the second inner wall. When viewed along the second direction, the third extension and the fourth extension are located inside the first inner wall.

14. The battery as claimed in claim 2, characterized in that, The battery also includes a first insulating element, at least a portion of which is located between the first adapter and the housing.

15. The battery as claimed in claim 14, characterized in that, The first insulating element is formed by curing an insulating adhesive coated on the housing; The first insulating member includes a first insulating portion, a second insulating portion, and a third insulating portion. The first insulating portion is disposed in the first recess and located on the periphery of the pole post. The second insulating portion is disposed between the protective plate and the fifth side wall. The third insulating portion is disposed between the first adapter and the fifth side wall.

16. A terminal device, characterized in that, Includes the battery as described in any one of claims 1 to 15.

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