Battery and terminal device

Abstract

The invention discloses a battery and a terminal device. The battery comprises a battery cell. The battery cell comprises an electrode assembly, a shell and a pole. The electrode assembly is arranged in the shell, and the shell is electrically connected with the electrode assembly. The shell 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 oppositely arranged in the first direction, the third side wall and the fourth side wall are oppositely arranged in the second direction, and the fifth side wall and the sixth side wall are oppositely arranged in the third direction. The first side wall is provided with a first concave part and a first body; or the third side wall is provided with a first concave part and a first body; or the fifth side wall is provided with a first concave part and a first body. The pole is connected to the first concave part and is insulated from the first concave part, one end of the pole is electrically connected with the electrode assembly, and the other end of the pole extends into a first accommodating space formed by the first concave part. The battery is favorable for improving the energy density.

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] In existing hard shell batteries, the poles are usually protruding from the top wall of the metal shell, resulting in a larger size gap between the poles on the top wall, which in turn causes a loss in battery energy density. Summary of the invention

[0003] In view of the above situation, the present application provides a battery that is beneficial to improving energy density.

[0004] An embodiment of the present application provides a battery, the battery comprising a cell. The cell comprises an electrode assembly, a shell and a pole. The electrode assembly is arranged in the shell, the shell is electrically connected to the electrode assembly, and the shell has a first polarity. The shell 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 direction is the thickness direction of the cell, the second direction is the width direction of the cell, and the third direction is the length direction of the cell. The first side wall is provided with a first recess and a first body, the first recess is recessed relative to the first body along the first direction to form a first accommodation space; or the third side wall is provided with a first recess and a first body, the first recess is recessed relative to the first body along the second direction to form a first accommodation space; or the fifth side wall is provided with a first recess and a first body, the first recess is recessed relative to the first body along the third direction to form a first accommodation space. 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 pole has a second polarity, and the other end of the pole extends into the first accommodation space. The first polarity is different from the second polarity.

[0005] In the above-mentioned battery, the first side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a first direction to form a first accommodation space; or the third side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a second direction to form a first accommodation space; or the fifth side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a third direction to form a first accommodation space. One end of the pole is electrically connected to the electrode assembly, and the other end of the pole extends into the first accommodation space. Compared with the existing method of protruding the pole out of the top wall of the shell, the size of the pole superimposed on the fifth side wall can be reduced, which is conducive to reducing the packaging length of the battery, thereby improving the energy density of the battery.

[0006] In some embodiments of the present application, the fifth side wall has a first polarity. The battery also includes a circuit board assembly. The circuit board assembly includes a protective plate, a first adapter and a second adapter. The protective plate is arranged on a side of the fifth side wall away from the electrode assembly. The fifth side wall is provided with a first opening connected to the first accommodating space, one end of the first adapter extends from the first opening into the first accommodating space and is connected to the pole, and the other end of the first adapter is connected to the protective plate. The second adapter connects the fifth side wall and the protective plate. The protective plate is electrically connected to the battery cell through the first adapter and the second adapter.

[0007] In some embodiments of the present application, the electrode assembly includes a pole piece group, a first pole ear and a second pole ear. The polarity of the first pole ear is opposite to that of the second pole ear. The pole piece group includes a first surface, and the first surface 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 side wall are arranged opposite to each other along the third direction, and 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 in the space formed by the first concave surface, the first pole ear extends from the first concave surface and is connected to the pole column, and the second pole ear extends from the second concave surface and is electrically connected to the shell. The connection between the first pole ear and the pole column shares the space in the second direction and the third direction with the pole piece group, and the connection between the first pole ear and the shell shares the space in the second direction and the third direction with the pole piece group, which is conducive to improving the energy density of the battery.

[0008] In some embodiments of the present application, the first side wall is provided with a first recess and a first body, and 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 side wall are arranged opposite to each other along the first direction, and 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, and the second wall is connected to the third wall, so that the shape of the first accommodating space is adapted to the shape of the first adapter.

[0009] In some embodiments of the present application, the thickness direction of the protective plate is perpendicular to the first direction, and the protective plate and the fifth side wall are arranged relative to each other along the third direction to reduce the space occupied by the protective plate in the third direction, which is beneficial to reduce the packaging length of the battery, thereby improving the energy density of the battery. The first adapter includes a first part, a second part and a first connecting part. The first part is arranged relative to the first wall along the first direction and connected to the pole, the second part is arranged relative 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 pole and the protective plate.

[0010] In some embodiments of the present application, the third side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along the second direction to form a first accommodation 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, and the fourth wall is connected to the fifth wall, so that the shape of the first accommodation space is adapted to the shape of the first adapter. The pole passes through the fourth wall along the second direction.

[0011] In some embodiments of the present application, the thickness direction of the protective plate is perpendicular to the first direction, and the protective plate and the fifth side wall are arranged relative to each other along the third direction to reduce the space occupied by the protective plate in the third direction, which is beneficial to reduce the packaging length of the battery, thereby improving the energy density of the battery. The first adapter includes a third part and a fourth part. The third part is arranged relative to the fourth wall along the second direction and connected to the pole, the fourth part is arranged relative to the protective plate along the third direction and connected to the protective plate, and the third part is connected to the fourth part, so as to improve the stability of the first adapter connected to the pole and the protective plate.

[0012] In some embodiments of the present application, the fifth side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a third direction to form a first accommodation 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, and the sixth wall is connected to the seventh wall, so that the shape of the first accommodation space is adapted to the shape of the first adapter. The pole passes through the seventh wall along the third direction.

[0013] In some embodiments of the present application, the thickness direction of the protective plate is perpendicular to the first direction, and the protective plate and the first body are arranged relative to each other along the third direction to reduce the space occupied by the protective plate in the third direction, which is beneficial to reduce the packaging length of the battery, thereby improving the energy density of the battery. The first adapter includes a fifth part, a sixth part, and a second connecting part. The fifth part is arranged relative to the seventh wall along the third direction and connected to the pole, the sixth part is arranged relative to the protective plate along the third direction and connected to the protective plate, and the second connecting part is connected between the fifth part and the sixth part, so as to improve the stability of the first adapter connected to the pole and the protective plate.

[0014] In some embodiments of the present application, the fifth side wall is further provided with a second recess, and the second recess 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 both ends of the first body along the second direction. The second recess is located in the space formed by the second concave surface, and the second pole ear extends from the second concave surface and is welded to one of the first side wall, the second side wall and the fourth side wall. 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, so as to reduce the risk of welding through the fifth side wall due to welding twice, which is beneficial to improving the safety performance of the battery.

[0015] In some embodiments of the present 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.

[0016] In some embodiments of the present application, when viewed along the third direction, the protective plate is separated from the second inner wall to reduce the risk of interference between the protective plate and the welding tool when the second inner wall and the second adapter are welded. The second adapter includes a first extension portion, a second extension portion, and a first bend portion. The first extension portion is disposed opposite to and welded to the second inner wall along the third direction, the second extension portion is disposed opposite to and connected to the protective plate along the third direction, and the first bend portion is disposed opposite to the first inner wall along the second direction and connected between the first extension portion and the second extension portion, so as to improve the stability of the second adapter being connected to the second recess and the protective plate.

[0017] In some embodiments of the present application, the protective plate includes a protruding portion, and when viewed along the third direction, the protruding portion overlaps with the second inner wall so as to increase the space for the protective plate to be laid. The second adapter includes a third extension portion, a fourth extension portion, and a second bending portion. The third extension portion is arranged opposite to the second inner wall along the third direction and welded, the fourth extension portion is arranged opposite to the protruding portion along the third direction and connected to the protruding portion, the third extension portion is arranged opposite to the fourth extension portion along the third direction, and the second bending portion is connected between the third extension portion and the fourth extension portion so as to improve the stability of the second adapter being connected to the second recess and the protective plate. When viewed along the third direction, the third extension portion and the fourth extension portion are located inside the second inner wall. When viewed along the second direction, the third extension portion and the fourth extension portion are located inside the first inner wall to reduce the space waste caused by the second adapter protruding out of the second accommodating space, which is beneficial to reduce the packaging length of the battery, thereby improving the energy density of the battery.

[0018] In some embodiments of the present application, the battery further includes a first insulating member, and at least a portion of the first insulating member is located between the first adapter and the shell to improve the stability of insulation between the first adapter and the shell.

[0019] In some embodiments of the present application, the first insulating member is formed by curing the insulating glue applied to the shell. The first insulating member includes a first insulating portion, a second insulating portion and a third insulating portion. The first insulating portion is arranged in the first recess and is located on the peripheral side of the pole to play an insulating and buffering role on the first recess, thereby reducing the risk of short circuit caused by interference between the first adapter and the first recess. The second insulating portion is arranged between the protective plate and the fifth side wall to improve the insulation stability between the protective plate and the fifth side wall. The third insulating portion is arranged between the first adapter and the fifth side wall to improve the insulation stability between the first adapter and the fifth side wall.

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

[0021] In the above-mentioned battery and terminal device, the first side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a first direction to form a first accommodation space; or the third side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a second direction to form a first accommodation space; or the fifth side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a third direction to form a first accommodation space. One end of the pole is electrically connected to the electrode assembly, and the other end of the pole extends into the first accommodation space. Compared with the existing method in which the pole protrudes out of the top wall of the shell, the size of the pole superimposed on the fifth side wall can be reduced, which is conducive to reducing the packaging length of the battery, thereby improving the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a battery in one embodiment of the present application.

[0023] Figure 2 It is a schematic structural diagram of a circuit board assembly of a battery separated from a top wall in one embodiment of the present application.

[0024] Figure 3 It is a schematic diagram of the disassembled structure of a battery cell in one embodiment of the present application.

[0025] Figure 4 It is a schematic diagram of the structure of the second insulating member of a battery in one embodiment of the present application.

[0026] Figure 5 It is a schematic diagram of the structure of a battery in another embodiment of the present application.

[0027] Figure 6 It is a schematic structural diagram of a circuit board assembly of a battery separated from a top wall in another embodiment of the present application.

[0028] Figure 7 It is a schematic diagram of the disassembled structure of a battery cell in another embodiment of the present application.

[0029] Figure 8 It is a schematic diagram of the structure of a battery in another embodiment of the present application.

[0030] Fig. 9 It is a schematic structural diagram of a circuit board assembly of a battery separated from a top wall in another embodiment of the present application.

[0031] Fig.10 It is a schematic diagram of the disassembled structure of a battery cell in another embodiment of the present application.

[0032] Fig.11 It is a schematic diagram of the structure of a battery in another embodiment of the present application.

[0033] Fig.12 It is a schematic structural diagram of a circuit board assembly of a battery separated from a top wall in another embodiment of the present application.

[0034] Fig.13 It is a schematic diagram of the structure of a battery in another embodiment of the present application.

[0035] Fig.14 It is a schematic structural diagram of a circuit board assembly of a battery separated from a top wall in another embodiment of the present application.

[0036] Fig.15 It is a schematic diagram of the structure of a terminal device in an embodiment of the present application.

[0037] Main component symbols The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings.

[0038] Batteries 100A, 100B, 100C, 100D, 100E Terminal device 200 Battery Cell 10 Electrode assembly 20 Pole piece group 21 First side 211 First main body surface 211A First concave surface 211B First inner surface 2111 Second inner surface 2112 Second concave surface 211C First tab 22 Second pole ear 23 Housing 30 First recess 30A First Wall 301 Second wall 302 The third wall 303 First transition wall 304 Fourth Wall 305 Fifth Wall 306 The Sixth Wall 307 Seventh Wall 308 First body 30B First accommodating space 30C First side wall 31 Second side wall 32 The third side wall 33 The second opening 331 Fourth side wall 34 Fifth side wall 35 First opening 351 Second recess 30D First inner wall 30D1 Second inner wall 30D2 The second accommodating space 30E Sixth side wall 36 Pole 40 Circuit board assembly 50 Protection board 51 Protrusion 51A Substrate 511 Flexible circuit board 512 First adapter 52 Part 1521 First edge 521A Second edge 521B Part 2522 First connection portion 523 Part 3 524 Part 4 525 Part 5526 Part 6 527 Second connection portion 528 Second adapter 53 First area 53A Second area 53B The first extension portion 531 The second extension portion 532 First bending portion 533 The third extension portion 534 Fourth extension portion 535 The second bending portion 536 The first insulating member 60 First insulating portion 61 Second insulating portion 62 The third insulating portion 63 Fourth insulating portion 64 Fifth insulating portion 65 The second insulating member 70 Communication port 70A First sub-connection port 701 Second sub-connection port 702 First connection area 71 Second connection area 72 Third connection area 73 Fourth connection area 74 First direction X Second direction Y The third direction Z. DETAILED DESCRIPTION

[0039] 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.

[0040] 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 tolerance, 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%.

[0041] 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.

[0042] 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.

[0043] One embodiment of the present application provides a battery, the battery comprising a cell. The cell comprises an electrode assembly, a shell and a pole. The electrode assembly is arranged in the shell, the shell is electrically connected to the electrode assembly, and the shell has a first polarity. The shell 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 direction is the thickness direction of the cell, the second direction is the width direction of the cell, and the third direction is the length direction of the cell. The first side wall is provided with a first recess and a first body, the first recess is recessed relative to the first body along the first direction to form a first accommodation space; or the third side wall is provided with a first recess and a first body, the first recess is recessed relative to the first body along the second direction to form a first accommodation space; or the fifth side wall is provided with a first recess and a first body, the first recess is recessed relative to the first body along the third direction to form a first accommodation space. 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 pole has a second polarity, and the other end of the pole extends into the first accommodation space. The first polarity is different from the second polarity.

[0044] In the above-mentioned battery, the first side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a first direction to form a first accommodation space; or the third side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a second direction to form a first accommodation space; or the fifth side wall is provided with a first recess and a first body, and the first recess is recessed relative to the first body along a third direction to form a first accommodation space. One end of the pole is electrically connected to the electrode assembly, and the other end of the pole extends into the first accommodation space. Compared with the existing method of protruding the pole out of the top wall of the shell, the size of the pole superimposed on the fifth side wall can be reduced, which is conducive to reducing the packaging length of the battery, thereby improving the energy density of the battery.

[0045] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0046] Embodiment 1 See also Figure 1An 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.

[0047] Please also read Figure 2 and Figure 3 The battery 100A includes a battery cell 10, and the battery cell 10 includes an electrode assembly 20, a shell 30 and a pole 40. The electrode assembly 20 is disposed in the shell 30. The electrode assembly 20 is used to convert chemical energy into electrical energy. The shell 30 is made of a metal material and has a conductive property. The metal element of the metal material includes at least one of Mg, Al, Zn, Fe, Sn, Cu, Ag, Pt, Au, Mn, Cr, and Ni. The shell 30 is electrically connected to the electrode assembly 20, and the shell 30 has a first polarity.

[0048] The housing 30 includes a first side wall 31, a second side wall 32, a third side wall 33, a fourth side wall 34, a fifth side wall 35, and a sixth side wall 36. The first side wall 31 and the second side wall 32 are arranged opposite to each other along the first direction X, the third side wall 33 and the fourth side wall 34 are arranged opposite to each other along the second direction Y, and the fifth side wall 35 and the sixth side wall 36 are arranged opposite to each other along the third direction Z. The first side wall 31, the second side wall 32, the third side wall 33, the fourth side wall 34, the fifth side wall 35, and the sixth side wall 37 enclose a space for accommodating the electrode assembly 20.

[0049] The first direction X is the thickness direction of the battery cell 10 , 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 .

[0050] Please continue reading Figure 2 The first side wall 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 the first direction X to form a first accommodation space 30C. The pole 40 is connected to the first recess 30A and is insulated from the first recess 30A. One end of the pole 40 is electrically connected to the electrode assembly 20, and the pole 40 has a second polarity. The other end of the pole 40 extends into the first accommodation space 30C.

[0051] When viewed along the first direction X, the pole 40 does not extend beyond the first recess 30A. When viewed along the second direction Y, the pole 40 does not extend beyond the first recess 30A. When viewed along the third direction Z, the pole 40 does not extend beyond the first recess 30A, so as to reduce the space waste caused by the pole 40 protruding out of the first accommodating space 30C.

[0052] Optionally, the pole 40 extends into the first accommodating space 30C along the first direction X; or the pole 40 extends into the first accommodating space 30C along a direction inclined relative to the first direction X.

[0053] The first polarity is different from the second polarity, so that the housing 30 and the pole 40 can form a complete current loop with the external circuit. Optionally, the housing 30 has a negative polarity and the pole 40 has a positive polarity; or the housing 30 has a positive polarity and the pole 40 has a negative polarity.

[0054] In the above-mentioned battery 100A, the first side wall 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 the first direction X to form a first accommodation space 30C, one end of the pole 40 is electrically connected to the electrode assembly 20, and the other end of the pole 40 extends into the first accommodation space 30C. Compared with the existing method of protruding the pole from the top wall of the shell, the size of the pole 40 superimposed on the fifth side wall 35 can be reduced, which is conducive to reducing the packaging length of the battery 100A, thereby improving the energy density of the battery 100A.

[0055] Please also read Figure 1 and Figure 2 , in some embodiments, the fifth side wall 35 has a first polarity. The battery 100A also includes a circuit board assembly 50, and the circuit board assembly 50 includes a protection plate 51, a first adapter 52 and a second adapter 53. The protection plate 51 is arranged on the side of the fifth side wall 35 away from the electrode assembly 20. The fifth side wall 35 is provided with a first opening 351 connected to the first accommodating space 30C. One end of the first adapter 52 extends into the first accommodating space 30C from the first opening 351 and connects to the pole 40, and the other end of the first adapter 52 is connected to the protection plate 51. The second adapter 53 connects the fifth side wall 35 and the protection plate 51. The protection plate 51 is electrically connected to the battery cell 10 through the first adapter 52 and the second adapter 53. The protection plate 51 has a protection circuit, and the protection circuit can provide, but is not limited to, protection functions such as overcharge, over-discharge, overcurrent, short circuit and anti-counterfeiting for the battery cell 10.

[0056] In some embodiments, the third side wall 33 defines 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 side wall 35 , so that the position of the first recess 30A matches the position of the first adapter 52 .

[0057] See also Figure 3 In some embodiments, the electrode assembly 20 includes a pole piece group 21, a first pole ear 22 and a second pole ear 23. The pole piece group 11 includes a positive pole piece, a separator and a negative pole piece arranged in sequence. Optionally, the positive pole piece, the separator and the negative pole piece are a laminated structure. The first pole ear 22 has the second polarity, and the second pole ear 23 has the first polarity.

[0058] The pole piece assembly 21 includes a first surface 211, and the first surface 211 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 the second direction Y. The first body surface 211A is arranged opposite to the fifth side wall 35 along the 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 the third direction Z.

[0059] The first concave portion 30A is located in the space formed by the first concave surface 211B, and the first pole tab 22 extends from the first concave surface 211B and connects to the pole column 40, so that the pole column 40 is electrically connected to the electrode assembly 20 and has the same second polarity as the first pole tab 22. The second pole tab 23 extends from the second concave surface 211C and is electrically connected to the shell 30, so that the shell 30 is electrically connected to the electrode assembly 20 and has the same first polarity as the second pole tab 23. Compared with the existing method in which a large space needs to be reserved between the end surface of the pole piece group and the top wall of the shell to accommodate the pole tab and part of the pole column, the connection between the first pole tab 22 and the pole column 40 shares the space in the second direction Y and the third direction Z with the pole piece group 21, and the connection between the first pole tab 22 and the shell 30 shares the space in the second direction Y and the third direction Z with the pole piece group 21, which is conducive to improving the energy density of the battery 100A.

[0060] In some embodiments, the thickness direction of the first pole tab 22 is parallel to the first direction X, so that the first pole tab 22 can be accommodated between the first recess 30A and the second side wall 32, and the risk of interference between the first pole tab 22 and the shell 30 can be reduced, thereby improving the stability of the connection between the first pole tab 22 and the pole 40.

[0061] Please continue reading 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 side wall 32 are arranged opposite to each other along the first direction X, the pole 40 passes through the first wall 301 along the first direction X, and the second wall 302 and the third wall 303 are connected between the first wall 301 and the first body 30B. When viewed along the first direction X, the second wall 302 is connected to the fifth side wall 35 and extends toward the sixth side wall 36, the third wall 303 is connected to the third side wall 33 and extends toward the fourth side wall 34, and 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.

[0062] The extended contour lines of the second wall 302 and the third wall 303 are straight lines, arc lines, or a combination of straight lines and arc lines when viewed along the first direction X. Optionally, the second wall 302 extends along the third direction Z, and the third wall 303 extends along the second direction Y.

[0063] In some embodiments, the first recess 30A further includes a first transition wall 304, which is connected between the second wall 302 and the third wall 303. When viewed along the first direction X, the extended contour line of the first transition wall 304 is an arc line, and the axis of the arc line extends along the first direction X, so as to reduce the risk of stress concentration at the connection between the second wall 302 and the third wall 303.

[0064] Please continue reading 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 the third direction Z, and the second inner surface 2112 extends along the 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 pole tab 22 extends from the first inner surface 2111 along the second direction Y; or the first pole tab 22 extends from the second inner surface 2112 along the third direction Z.

[0065] Please also read Figure 1 and Figure 2 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 side wall 35 are arranged relative to each other along the third direction Z to reduce the space occupied by the protective plate 51 in the third direction Z, which is beneficial to reducing the packaging length of the battery 100A, thereby improving the energy density of the battery 100A.

[0066] In some embodiments, the first adapter 52 includes a first portion 521, a second portion 522, and a first connecting portion 523. The first portion 521 is disposed opposite to the first wall 301 along the first direction X and connected to the pole 40, the second portion 522 is disposed opposite to the protection plate 51 along the third direction Z and connected to the protection plate 51, and the first connecting portion 523 is connected between the first portion 521 and the second portion 522. Specifically, the first portion 521 is attached to the end surface of the pole 40, and / or the second portion 522 is attached to the surface of the protection plate 51 facing the fifth side wall 35, so as to improve the stability of the first adapter 52 connected to the pole 40 and the protection plate 51.

[0067] Optionally, the first portion 521 , the second portion 522 and the first connecting portion 523 are integrally provided.

[0068] In some embodiments, when viewed along the first direction X, the first portion 521 includes a first edge 521A and a second edge 521B. The first edge 521A and the second wall 302 are spaced apart along the second direction Y, and the second edge 521B and the third wall 303 are spaced apart along the third direction Z, so as to form a buffer gap between the first edge 521A and the second wall 302 and between the second edge 521B and the third wall 303. When the battery 100A is impacted by an external force, the risk of interference between the first portion 521 and the first recess 30A and causing a short circuit is reduced.

[0069] Please also read Figure 1 and Figure 2 In some embodiments, the second adapter 53 is in a flat plate shape, 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 protection plate 51, and the second region 53B is located outside the protection plate 51, that is, when viewed along the third direction Z, the second region 53B is separated from the protection plate 51. The first region 53A is connected to the surface of the protection plate 51 facing the fifth side wall 35, and the second region 53B is connected to the fifth side wall 35, so as to increase the connection area between the second adapter 53 and the protection plate 51 and the fifth side wall 35, thereby facilitating the improvement of the stability of the second adapter 53 connected to the pole 40 and the protection plate 51.

[0070] In some embodiments, the second region 53B is welded to the fifth side wall 35, and the second pole ear 23 is welded to the first side wall 31, the second side wall 32 and one of the fourth side walls 34, so as to reduce the risk of welding through the fifth side wall 35 due to welding twice, which is beneficial to improving the safety performance of the battery 100A.

[0071] Please also read Figure 1 and Figure 2 In some embodiments, the protection plate 51 includes a substrate 511 and a flexible circuit board 512 connected to the substrate 511. The substrate 511 is arranged opposite to the fifth side wall 35 along the third direction Z. It should be noted that the thickness direction of the protection 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 part of the flexible circuit board 512 extends from a side of the substrate 511 away from the fifth side wall 35. One end of the flexible circuit board 512 away from the substrate 511 is used to connect to the main board or other external circuits of the external terminal device.

[0072] In some embodiments, the flexible circuit board 512 is bent from a side of the substrate 511 facing the fifth side wall 35 to a side of the substrate 511 away from the fifth side wall 35 .

[0073] Optionally, the protection board 51 is a hard-flex board.

[0074] Please also read Figure 1 and Figure 2 In some embodiments, the battery 100A further includes a first insulating member 60 , and at least a portion of the first insulating member 60 is located between the first adapter 52 and the shell 30 to improve the stability of the insulation between the first adapter 52 and the shell 30 .

[0075] In some embodiments, the first insulating member 60 is formed by curing the insulating glue applied to the shell 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 arranged in the first recess 30A and is located on the peripheral side of the pole 40 to play an insulating and buffering role on the first recess 30A, thereby reducing the risk of interference between the first adapter 52 and the first recess 30A and causing a short circuit. 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 arranged between the protection plate 51 and the fifth side wall 35 to improve the insulation stability between the protection plate 51 and the fifth side wall 35. The third insulating portion 63 is arranged 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.

[0076] Optionally, the first insulating member 60 is a prefabricated insulating tape.

[0077] Please also read Figure 1 and Figure 4 In some embodiments, the battery 100A further includes a second insulating member 70, which extends from a side of the protection plate 51 away from the fifth side wall 35 to the first side wall 31 and the second side wall 32 to improve the stability of the circuit board assembly 50 on the fifth side wall 35. The second insulating member 70 also covers the first accommodating space 30C to protect the pole 40 and the first adapter 52 located in the first accommodating space 30C.

[0078] In some embodiments, the second insulating member 70 is provided with a communication port 70A, and the flexible circuit board 512 extends out from the communication port 70A, so that the flexible circuit board 512 can be connected to a main board of an external terminal device or other external circuits.

[0079] In some embodiments, the second insulating member 70 includes a first connection area 71, a second connection area 72, a third connection area 73, and a fourth connection area 74. The first connection area 71 is connected to a side of the substrate 511 away from the fifth side wall 35 and covers the first opening 351. The second connection area 72 connects the first connection area 71 and the first body 30B and covers the first recess 30A. The third connection area 73 connects the first connection area 71 and the second side wall 32. The fourth connection area 74 connects the first connection area 71 and the third side wall 33 and covers the second opening 331. The first connection area 71, the second connection area 72, and the fourth connection area 74 cooperate to cover the first accommodating space 30C.

[0080] 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 area 71, and the second sub-communication port 702 is formed on the second connection area 72. The first sub-communication port 701 and the second sub-communication port 702 are connected to each other. The first connection area 71 includes a first sub-connection area 711 and a second sub-connection area 712 arranged along the second direction Y. The first sub-communication port 701 is located between the first sub-connection area 711 and the second sub-connection area 712. The first sub-connection area 711 covers the substrate 511, and the second sub-connection area 712 covers the first opening 351.

[0081] Optionally, the second insulating member 70 is adhesive tape.

[0082] Embodiment 2 Please also read Figure 5 and Figure 6 One embodiment of the present application further provides a battery 100B. The battery 100B differs from the battery 100A in that the first recess 30A and the first body 30B are provided at different locations on the housing 30, and the structure of the corresponding circuit board assembly 50 is different.

[0083] The third side wall 33 is provided with a first recess 30A and a first body 30B, wherein the first recess 30A is recessed relative to the first body 30B along the second direction Y to form a first accommodation space 30C. The pole 40 is connected to the first recess 30A and is insulated from the first recess 30A, one end of the pole 40 is electrically connected to the electrode assembly 20, and the pole 40 has a second polarity, and the other end of the pole 40 extends into the first accommodation space 30C.

[0084] When viewed along the first direction X, the pole 40 does not extend beyond the first recess 30A. When viewed along the second direction Y, the pole 40 does not extend beyond the first recess 30A. When viewed along the third direction Z, the pole 40 does not extend beyond the first recess 30A, so as to reduce the space waste caused by the pole 40 protruding out of the first accommodating space 30C.

[0085] Optionally, the pole 40 extends into the first accommodating space 30C along the second direction Y; or the pole 40 extends into the first accommodating space 30C along a direction inclined relative to the second direction Y.

[0086] In the above-mentioned battery 100B, the third side wall 33 is provided with a first recess 30A and a first body 30B, and the first recess 30A is recessed relative to the first body 30B along the second direction Y to form a first accommodation space 30C. One end of the pole 40 is electrically connected to the electrode assembly 20, and the other end of the pole 40 extends into the first accommodation space 30C. Compared with the existing method of protruding the pole from the top wall of the shell, the size of the pole 40 superimposed on the fifth side wall 35 can be reduced, which is conducive to reducing the packaging length of the battery 100B, thereby improving the energy density of the battery 100B.

[0087] Please continue reading Figure 6 In some embodiments, the first recess 30A includes a fourth wall 305 and a fifth wall 306. When viewed along the first direction X, the fourth wall 305 is connected to the fifth side wall 35 and extends toward the sixth side wall 36, the fifth wall 306 is connected to the first body 30B and extends toward the fourth side wall 34, and the fourth wall 305 is connected to the fifth wall 306, so that the shape of the first accommodating space 30C is adapted to the shape of the first adapter 52. The pole 40 passes through the fourth wall 305 along the second direction Y.

[0088] 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 40, and the space occupied by the first recess 30A in the second direction Y is reduced.

[0089] 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 side wall 35 are arranged relative to each other along the third direction Z to reduce the space occupied by the protective plate 51 in the third direction Z, which is beneficial to reducing the packaging length of the battery 100B, thereby improving the energy density of the battery 100B.

[0090] In some embodiments, the first adapter 52 is an "L"-shaped connecting piece. The first adapter 52 includes a third portion 524 and a fourth portion 525. The third portion 524 is arranged opposite to the fourth wall 305 along the second direction Y and connected to the pole 40, and the fourth portion 525 is arranged opposite to the protection plate 51 along the third direction Z and connected to the protection plate 51, and the third portion 524 is connected to the fourth portion 525. Specifically, the third portion 524 is attached to the end face of the pole 40, and / or the fourth portion 525 is attached to the surface of the protection plate 51 facing the fifth side wall 35, so as to improve the stability of the first adapter 52 connected to the pole 40 and the protection plate 51.

[0091] Optionally, the third portion 524 and the fourth portion 525 are integrally provided.

[0092] 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 is located on the peripheral side of the pole 40 to play an insulating and buffering role on the first recess 30A, thereby reducing the risk of interference between the first adapter 52 and the first recess 30A and causing a short circuit. 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 protection plate 51 and the fifth side wall 35 to improve the insulation stability between the protection plate 51 and the fifth side wall 35.

[0093] See also 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 the third direction Z, and the second inner surface 2112 extends along the second direction Y. The first inner surface 2111 is arranged opposite to the fourth wall 305 along the second direction Y, and the second inner surface 2112 is arranged opposite to the fifth wall 306 along the third direction Z. The first pole tab 22 extends from the first inner surface 2111 along the second direction Y, and one end of the first pole tab 22 away from the first inner surface 2111 is connected to the pole 40. Optionally, the end of the first pole tab 22 away from the first inner surface 2111 is bent and arranged opposite to the fourth wall 305 along the second direction Y, so as to improve the stability of the connection between the first pole tab 22 and the pole 40.

[0094] 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.

[0095] Embodiment 3 Please also read Figure 8 and Fig. 9 One embodiment of the present application further provides a battery 100C. The battery 100C is different from the battery 100A in that the first recess 30A and the first body 30B are provided at different locations of the housing 30, and the structure of the corresponding circuit board assembly 50 is different.

[0096] The fifth side wall 35 is provided with a first recess 30A and a first body 30B, wherein the first recess 30A is recessed relative to the first body 30B along the third direction Z to form a first accommodation space 30C. The pole 40 is connected to the first recess 30A and is insulated from the first recess 30A, one end of the pole 40 is electrically connected to the electrode assembly 20, and the pole 40 has a second polarity, and the other end of the pole 40 extends into the first accommodation space 30C.

[0097] When viewed along the first direction X, the pole 40 does not extend beyond the first recess 30A. When viewed along the second direction Y, the pole 40 does not extend beyond the first recess 30A. When viewed along the third direction Z, the pole 40 does not extend beyond the first recess 30A, so as to reduce the space waste caused by the pole 40 protruding out of the first accommodating space 30C.

[0098] Optionally, the pole 40 extends into the first accommodating space 30C along the third direction Z; or the pole 40 extends into the first accommodating space 30C along a direction inclined relative to the third direction Z.

[0099] In the above-mentioned battery 100C, the fifth side wall 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 the third direction Z to form a first accommodation space 30C, one end of the pole 40 is electrically connected to the electrode assembly 20, and the other end of the pole 40 extends into the first accommodation space 30C. Compared with the existing method of protruding the pole from the top wall of the shell, the size of the pole 40 superimposed on the fifth side wall 35 can be reduced, which is conducive to reducing the packaging length of the battery 100C, thereby improving the energy density of the battery 100C.

[0100] Please continue reading Fig. 9 In some embodiments, the first recess 30A includes a sixth wall 307 and a seventh wall 308. When viewed along the first direction X, the sixth wall 307 is connected to the first body 30B and extends toward the sixth side wall 36, and the seventh wall 308 is connected to the third side wall 33 and extends toward the fourth side wall 34. The sixth wall 307 is connected to the seventh wall 308, so that the shape of the first accommodating space 30C is adapted to the shape of the first adapter 52. The pole 40 passes through the seventh wall 308 along the third direction Z.

[0101] 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 40, and the space occupied by the first recess 30A in the third direction Z is reduced.

[0102] 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 first body 30B are arranged relative to each other along the third direction Z to reduce the space occupied by the protective plate 51 in the third direction Z, which is beneficial to reducing the packaging length of the battery 100C and thereby improving the energy density of the battery 100C.

[0103] In some embodiments, the first adapter 52 includes a fifth portion 526, a sixth portion 527, and a second connection portion 528. The fifth portion 526 is disposed opposite to the seventh wall 308 along the third direction Z and connected to the pole 40, the sixth portion 527 is disposed opposite to the protection plate 51 along the third direction Z and connected to the protection plate 51, and the second connection portion 528 is connected between the fifth portion 526 and the sixth portion 527. Specifically, the fifth portion 526 is attached to the end surface of the pole 40, and / or the sixth portion 527 is attached to the surface of the protection plate 51 facing the first body 30B, so as to improve the stability of the first adapter 52 connected to the pole 40 and the protection plate 51.

[0104] Optionally, the fifth portion 526, the sixth portion 527 and the second connecting portion 528 are integrally provided.

[0105] 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 is located on the peripheral side of the pole 40 to play an insulating and buffering role on the first recess 30A, thereby reducing the risk of interference between the first adapter 52 and the first recess 30A and causing a short circuit. 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 protection plate 51 and the first body 30B to improve the insulation stability between the protection plate 51 and the first body 30B.

[0106] See also Fig.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 the third direction Z, and the second inner surface 2112 extends along the second direction Y. The first inner surface 2111 is arranged opposite to the sixth wall 307 along the second direction Y, and the second inner surface 2112 is arranged opposite to the seventh wall 308 along the third direction Z. The first pole tab 22 extends from the second inner surface 2112 along the third direction Z, and one end of the first pole tab 22 away from the second inner surface 2112 is connected to the pole 40. Optionally, the end of the first pole tab 22 away from the second inner surface 2112 is bent and arranged opposite to the seventh wall 308 along the third direction Z, so as to improve the stability of the connection between the first pole tab 22 and the pole 40.

[0107] 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.

[0108] Embodiment 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 100C lies in that the fifth side wall 35 is further provided with a second recess 30D and the corresponding second adapter 53 has a different structure.

[0109] The second recess 30D is recessed relative to the first body 30B along the third direction Z to form a second accommodation space 30E. The second recess 30D and the first recess 30A are located at two ends of the first body 30B along the second direction Y. One end of the second adapter 53 is connected to the protection plate 51, and the other end of the second adapter 53 extends into the second accommodation space 30E and is welded to the second recess 30D.

[0110] The second recess 30D is located in the space formed by the second concave surface 211C, and the second pole tab 23 extends from the second concave surface 211C and is welded to the first side wall 31, the second side wall 32 and one of the fourth side walls 34 to reduce the risk of welding through the fifth side wall 35 due to welding twice, which is beneficial to improving the safety performance of the battery 100D.

[0111] 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, and 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 protection plate 51 and the fifth side wall 35, thereby facilitating the improvement of the stability of the second adapter 53 connected to the pole 40 and the protection plate 51.

[0112] In some embodiments, when viewed along the third direction Z, the protection plate 51 is separated from the second inner wall 30D2 to reduce the risk of interference between the protection plate 51 and the welding tool when the second inner wall 30D2 and the second adapter 53 are welded.

[0113] The second adapter 53 includes a first extension portion 531, a second extension portion 532 and a first bending portion 533. The first extension portion 531 is disposed opposite to the second inner wall 30D2 along the third direction Z and is welded. The second extension portion 532 is disposed opposite to the protection plate 51 along the third direction Z and is connected to the protection plate 51. The first bending portion 533 is disposed opposite to the first inner wall 30D1 along the second direction Y and is connected between the first extension portion 531 and the second extension portion 532. Specifically, the first extension portion 531 is attached to the second inner wall 30D2, and / or the second extension portion 532 is attached to the surface of the protection 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 protection plate 51.

[0114] Optionally, the first extending portion 531 , the second extending portion 532 and the first bending portion 533 are integrally provided.

[0115] Except for the above differences, the parameters of the battery 100D and the battery 100C are substantially the same, and reference may be made to the description of the battery 100A above.

[0116] Embodiment 5 Please also read Fig.13 and Fig.14 One embodiment of the present application further provides a battery 100E. The difference between the battery 100E and the battery 100D lies in that the protective plate 51 has a portion overlapping with the second inner wall 30D2 and the corresponding second adapter 53 has a different structure.

[0117] The protection plate 51 includes a protruding portion 51A. When viewed along the third direction Z, the protruding portion 51A overlaps with the second inner wall 30D2 so as to increase the fabric space of the protection plate 51.

[0118] The second adapter 53 includes a third extension portion 534, a fourth extension portion 535, and a second bending portion 536. The third extension portion 534 is disposed opposite to the second inner wall 30D2 along the third direction Z and is welded. The fourth extension portion 535 is disposed opposite to and connected to the convex portion 51A along the third direction Z. The third extension portion 534 is disposed opposite to the fourth extension portion 535 along the third direction Z. The second bending portion 536 is connected between the third extension portion 534 and the fourth extension portion 535. Specifically, the third extension portion 534 is attached to the second inner wall 30D2, and / or the fourth extension portion 535 is attached to the surface of the convex portion 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 protection plate 51.

[0119] In some embodiments, when observed along the third direction Z, the third extension portion 534 and the fourth extension portion 535 are located inside the second inner wall 30D2, and when observed along the second direction Y, the third extension portion 534 and the fourth extension portion 535 are located inside the first inner wall 30D1, so as to reduce the space waste caused by the second adapter 53 protruding out of the second accommodating space 30E, which is beneficial to reduce the packaging length of the battery 100E, thereby improving the energy density of the battery 100E.

[0120] Optionally, the third extending portion 534 , the fourth extending portion 535 and the second bending portion 536 are integrally provided.

[0121] 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.

[0122] See also Fig.15 An embodiment of the present application further provides a terminal device 200, comprising the battery (100A, 100B, 100C, 100D, 100E) in any of the above embodiments.

[0123] Optionally, the terminal device 200 may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, etc.

[0124] In summary, in the above-mentioned batteries (100A, 100B, 100C, 100D, 100E) and terminal device 200, the first side wall 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 the first direction X to form a first accommodation space 30C; or the third side wall 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 accommodation space 30C; or the fifth side wall 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 the third direction Z to form a first accommodation space 30C. One end of the pole 40 is electrically connected to the electrode assembly 20, and the other end of the pole 40 extends into the first accommodation space 30C. Compared with the existing method of protruding the pole out of the top wall of the shell, the size of the pole 40 superimposed on the fifth side wall 35 can be reduced, which is beneficial to reducing the packaging length of the battery 100A and further improving the energy density of the battery 100A.

[0125] 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 a cell, the cell comprises an electrode assembly, a shell and a pole, the electrode assembly is arranged in the shell, the shell is electrically connected to the electrode assembly, and the shell has a first polarity; The shell includes 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, the fifth side wall and the sixth side wall are arranged opposite to each other along a third direction, the first direction is a thickness direction of the battery cell, the second direction is a width direction of the battery cell, and the third direction is a length direction of the battery cell; The first side wall is provided with a first recess and a first body, the first recess is recessed relative to the first body along the first direction to form a first accommodating space, or, The third side wall is provided with a first recess and a first body, the first recess is recessed relative to the first body along the second direction to form a first accommodating space, or, The fifth side wall is provided with a first recess and a first body, wherein the first recess is recessed relative to the first body along the third direction to form a first accommodating space; The pole is connected to the first recess and is insulated from the first recess, one end of the pole is electrically connected to the electrode assembly, and the pole has a second polarity, and the other end of the pole extends into the first accommodating space; The first polarity is different from the second polarity.

2. The battery according to claim 1, characterized in that The fifth side wall has the first polarity, and the battery also includes a circuit board assembly, which includes a protective plate, a first adapter and a second adapter. The protective plate is arranged on a side of the fifth side wall away from the electrode assembly, and the fifth side wall is provided with a first opening connected to the first accommodating space. One end of the first adapter extends from the first opening into the first accommodating space and is connected to the pole, and the other end of the first adapter is connected to the protective plate, and the second adapter is connected to the fifth side wall and the protective plate.

3. The battery according to claim 2, characterized in that The electrode assembly includes a pole piece group, a first pole ear and a second pole ear, the polarity of the first pole ear is opposite to the polarity of the second pole ear, the pole piece group includes a first surface, the first surface 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 side wall are arranged opposite to each other along the third direction, and the first concave surface and the second concave surface are respectively concave relative to the first body surface along the third direction; The first concave portion is located in a space formed by the first concave surface, the first pole tab extends from the first concave surface and is connected to the pole, and the second pole tab extends from the second concave surface and is electrically connected to the housing.

4. The battery according to claim 2, characterized in that The first side wall is provided with a first recess and a first body, the first recess is 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 to 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, and 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, and the second wall is connected to the third wall.

5. The battery according to claim 4, characterized in that The thickness direction of the protection plate is perpendicular to the first direction, and the protection plate and the fifth side wall are arranged opposite to 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 arranged opposite to the first wall along the first direction and connected to the pole, the second part is arranged opposite to the protection plate along the third direction and connected to the protection plate, and the first connecting part is connected between the first part and the second part.

6. The battery according to claim 2, characterized in that The third side wall is provided with a first recess and a first body, wherein the first recess is 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 according to claim 6, characterized in that The thickness direction of the protection plate is perpendicular to the first direction, and the protection plate and the fifth side wall are arranged opposite to each other along the third direction; The first adapter includes a third part and a fourth part, the third part is arranged opposite to the fourth wall along the second direction and connected to the pole, the fourth part is arranged opposite to the protection plate along the third direction and connected to the protection plate, and the third part is connected to the fourth part.

8. The battery according to claim 3, characterized in that The fifth side wall is provided with a first recess and a first body, wherein the first recess is 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 according to claim 8, characterized in that The thickness direction of the protection plate is perpendicular to the first direction, and the protection plate and the first body are arranged 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 is arranged opposite to the seventh wall along the third direction and connected to the pole, the sixth part is arranged opposite to the protection plate along the third direction and connected to the protection plate, and the second connecting part is connected between the fifth part and the sixth part.

10. The battery according to claim 8 or 9, characterized in that The fifth side wall is further provided with a second recessed portion, the second recessed portion is recessed relative to the first body along the third direction to form a second accommodation space, the second recessed portion and the first recessed portion are located at two ends of the first body along the second direction, the second recessed portion is located in the space formed by the second concave surface, and the second pole tab extends from the second concave surface and is welded to one of the first side wall, the second side wall and the fourth side wall; One end of the second adapter is connected to the protection 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 according to 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 according to claim 11, characterized in that When viewed along the third direction, the protection plate is separated from the second inner wall; The second adapter includes a first extension portion, a second extension portion and a first bending portion, the first extension portion and the second inner wall are arranged opposite to each other along the third direction and are welded, the second extension portion and the protective plate are arranged opposite to each other along the third direction and are connected to the protective plate, and the first bending portion and the first inner wall are arranged opposite to each other along the second direction and are connected between the first extension portion and the second extension portion.

13. The battery according to claim 11, characterized in that The protection plate includes a protruding portion, and when viewed along the third direction, the protruding portion overlaps with the second inner wall; The second adapter includes a third extension portion, a fourth extension portion and a second bending portion, the third extension portion is arranged opposite to the second inner wall along the third direction and welded, the fourth extension portion is arranged opposite to the protruding portion along the third direction and connected to the protruding portion, the third extension portion is arranged opposite to the fourth extension portion along the third direction, the second bending portion is connected between the third extension portion and the fourth extension portion, and when viewed along the third direction, the third extension portion and the fourth extension portion are located inside the second inner wall, and when viewed along the second direction, the third extension portion and the fourth extension portion are located inside the first inner wall.

14. The battery according to claim 2, characterized in that The battery further includes a first insulating member, at least a portion of which is located between the first adapter and the shell.

15. The battery according to claim 14, characterized in that The first insulating member is formed by curing the insulating glue applied to the shell; The first insulating member includes a first insulating portion, a second insulating portion and a third insulating portion. The first insulating portion is arranged in the first recess and is located on the peripheral side of the pole. The second insulating portion is arranged between the protection plate and the fifth side wall. The third insulating portion is arranged between the first adapter and the fifth side wall.

16. A terminal device, characterized in that: Comprising a battery as claimed in any one of claims 1 to 15.

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