Battery and terminal apparatus

Abstract

A battery and a terminal apparatus. The battery comprises a battery cell (200), comprising an electrode assembly (10), a casing (23), and a pole. The casing (23) comprises a top wall (30), a first side wall, and a second side wall. The first side wall comprises a main body portion (32), and a first recess and a second recess connected to the main body portion (32). The first recess forms a first accommodating space, and the second recess forms a second accommodating space. The top wall (30) is provided with a first opening (211) in communication with the first accommodating space, and a second opening (311) in communication with the second accommodating space. The electrode assembly (10) is disposed in the casing (23). The first recess is electrically connected to the electrode assembly (10). The pole is connected to the second recess and insulated from the second recess; one end of the pole is electrically connected to the electrode assembly (10), and the other end of the pole extends into the second accommodating space. A circuit board assembly (40) comprises a protective plate (50), a first adapter (52), and a second adapter (53), the protective plate (50) being disposed on the top wall (30), the first adapter (52) extending into the first accommodating space and being connected to the first recess, and the second adapter (53) extending into the second accommodating space and being connected to the pole. The described battery helps to increase energy density.

Description

Battery and terminal device TECHNICAL FIELD

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

[0002] In the existing hard-shell battery, the pole usually protrudes from the top wall of the metal shell, which results in a large space occupied by the pole in the length direction of the battery, thereby causing a loss of energy density of the battery.

[0003] SUMMARY

[0004] In view of the above, the present application provides a battery, which is beneficial to improve the energy density.

[0005] Embodiments of the present application provide a battery, which comprises a battery cell and a circuit board assembly. The battery cell comprises an electrode assembly, a shell and a pole. The shell comprises a top wall, a first side wall and a second side wall connected to both sides of the top wall in a first direction. The first direction is the thickness direction of the battery cell. The first side wall comprises a main body portion, a first recess portion and a second recess portion connected to the main body portion. The first recess portion is recessed towards the second side wall relative to the main body portion to form a first accommodation space, and the second recess portion is recessed towards the second side wall relative to the main body portion to form a second accommodation space. The top wall is provided with a first opening communicating with the first accommodation space and a second opening communicating with the second accommodation space. The electrode assembly is arranged in the shell, the first recess portion is electrically connected to the electrode assembly, and the pole is connected to the second recess portion and is arranged in insulation with the second recess portion. One end of the pole is electrically connected to the electrode assembly, and the other end of the pole extends into the second accommodation space. The polarity of the first recess portion is opposite to the polarity of the pole. The circuit board assembly comprises a protection plate, a first adapter and a second adapter. The protection plate is arranged on the top wall. One end of the first adapter extends into the first accommodation space from the first opening and is connected to the first recess portion, and the other end of the first adapter is connected to the protection plate. One end of the second adapter extends into the second accommodation space from the second opening and is connected to the pole, and the other end of the second adapter is connected to the protection plate.

[0006] In the above battery, one end of the pole is electrically connected to the electrode assembly, and the other end of the pole extends into the second accommodation space, so as to reduce the space occupied by the pole in the length direction of the battery cell. The protection plate is arranged on the top wall, one end of the second adapter extends into the second accommodation space from the second opening and is connected to the pole, and the other end of the second adapter is connected to the protection plate, so as to reduce the size of the protection plate and the pole stacked on the top wall, which is beneficial to reduce the packaging length of the battery, thereby improving the energy density of the battery.

[0007] In some embodiments of the present application, the electrode assembly includes a tab group, a first tab and a second tab. The first tab has an opposite polarity to the second tab. The tab group is provided with a first recess and a second recess. In the first direction, a projection of the first recess is within a projection of the first recess, and a projection of the second recess is within a projection of the second recess. The first tab extends from the first recess, and the first tab is connected to the first recess. The second tab extends from the second recess, and the second tab is connected to a part of the pole that extends into the shell. Compared with the prior art, in which a large space is required between the end face of the tab group and the top wall of the shell to accommodate the tab and part of the pole, the connection between the first tab and the first recess shares the space in the first direction with the tab group and the length direction of the battery, and the connection between the second tab and the pole shares the space in the first direction with the tab group and the length direction of the battery, which is beneficial to improve the energy density of the battery.

[0008] In some embodiments of the present application, the shell further includes a bottom wall, a third side wall and a fourth side wall. The top wall and the bottom wall are oppositely arranged in the second direction. The first side wall, the third side wall, the second side wall and the fourth side wall are connected end to end and between the top wall and the bottom wall. The third side wall and the fourth side wall are oppositely arranged in the third direction. The first direction, the second direction and the third direction are perpendicular to each other. The third side wall is provided with a third opening communicating with the first accommodating space, and the fourth side wall is provided with a fourth opening communicating with the second accommodating space, so that the first recess and the second recess are located at two corner positions of the shell, which is beneficial to adapt the positions of the first recess and the second recess to the positions of the first adapter and the second adapter, respectively.

[0009] In some embodiments of the present application, the first recess includes a first wall, a second wall and a third wall. The first wall and the second side wall are oppositely arranged in the first direction, and the second wall and the third wall are connected between the first wall and the first side wall. In the first direction, the second wall is connected to the top wall and extends toward the bottom wall, and the third wall is connected to the third side wall and extends toward the fourth side wall. The second recess includes a fourth wall, a fifth wall and a sixth wall. The fourth wall and the second side wall are oppositely arranged in the first direction, and the fifth wall and the sixth wall are connected between the fourth wall and the main body. In the first direction, the fifth wall is connected to the top wall and extends toward the bottom wall, and the sixth wall is connected to the fourth side wall and extends toward the third side wall.

[0010] In some embodiments of the application, the thickness direction of the protection plate is perpendicular to the first direction, and the protection plate and the top wall are oppositely arranged along the second direction. The space occupied by the protection plate in the second direction is reduced, which is conducive to reducing the packaging length of the battery and improving the energy density of the battery. The first adapter includes a first component, a second component, and a first connecting portion. The first component is oppositely arranged with the first wall along the first direction and electrically connected with the first wall, the second component is oppositely arranged with the protection plate along the second direction and electrically connected with the protection plate, and the first connecting portion is connected between the first component and the second component. The second adapter includes a third component, a fourth component, and a second connecting portion. The third component is oppositely arranged with the fourth wall along the first direction and electrically connected with the pole, the fourth component is oppositely arranged with the protection plate along the second direction and electrically connected with the protection plate, and the second connecting portion is connected between the third component and the fourth component.

[0011] In some embodiments of the application, the third component includes a first edge and a second edge when viewed along the first direction. The first edge is arranged spaced apart from the fifth wall, and the second edge is arranged spaced apart from the sixth wall to form a buffer gap between the first edge and the fifth wall and between the second edge and the sixth wall. The risk of short circuit caused by interference between the third component and the second recess when the battery is impacted by external force is reduced.

[0012] The distance between the first edge and the fifth wall is 0.5mm to 3mm, and the distance between the second edge and the sixth wall is 0.5mm to 3mm, which reduces the risk of interference between the third component and the second recess and is conducive to connecting the third component with the pole.

[0013] In some embodiments of the application, the battery further includes an injection molding part. The injection molding part fills the gap between the third component and the fourth wall, the gap between the first edge and the fifth wall, and the gap between the second edge and the sixth wall, so as to fix the third component in the second accommodation space and reduce the risk of short circuit caused by interference between the second adapter and the second recess.

[0014] In some embodiments of the application, the circuit board assembly includes a substrate and a flexible circuit board connected to the substrate. The substrate is oppositely arranged with the top wall along the second direction, and the first adapter and the second adapter are connected to the substrate. The flexible circuit board includes a first part, a second part, a third part, and a first bending part. The first part includes a first segment and a second segment, the first segment is connected to the side of the substrate away from the top wall, and the projection of the second segment is separated from the projection of the substrate along the second direction. The second part is located on the side of the first part away from the substrate. The first bending part is connected between the second segment and the second part. The third part extends from the side of the second part away from the substrate. The injection molding part also covers the substrate and the first segment, and the second part, the third part, the first bending part, and at least part of the second segment are exposed to the injection molding part, so as to facilitate the connection of the flexible circuit board to the mainboard of the external terminal device or other external circuits.

[0015] In some embodiments of the application, the injection molding part includes a first surface, a second surface and a third surface. The first surface and the second surface are arranged along a third direction as viewed along a second direction, the distance between the second surface and the top wall is less than the distance between the first surface and the top wall along the second direction, the third surface is connected between the first surface and the second surface, and the second section extends from the third surface to reduce the risk of interference between the flexible circuit board and the external circuit.

[0016] In some embodiments of the application, the thickness direction of the protection plate is the first direction, and the protection plate is perpendicular to the top wall to increase the arrangement space of the protection plate in the thickness direction thereof. The first adapter includes a fifth component, a sixth component and a third connecting portion. The fifth component is arranged opposite to the first wall along the first direction and is electrically connected to the first wall, the sixth component is arranged opposite to the protection plate along the first direction and is electrically connected to the protection plate, and the third connecting portion is connected between the fifth component and the sixth component. The second adapter includes a seventh component, an eighth component and a fourth connecting portion. The seventh component is arranged opposite to the fourth wall along the first direction and is electrically connected to the pole, the eighth component is arranged opposite to the protection plate along the first direction and is electrically connected to the protection plate, and the fourth connecting portion is connected between the seventh component and the eighth component.

[0017] In some embodiments of the application, as viewed along the first direction, the seventh component includes a third edge and a fourth edge. The third edge is arranged opposite to the fifth wall and spaced apart from the fifth wall, and the fourth edge is arranged opposite to the sixth wall and spaced apart from the sixth wall to form a buffer gap between the third edge and the fifth wall and between the fourth edge and the sixth wall. The risk of short circuit caused by interference between the third component and the second recess when the battery is impacted by external force is reduced.

[0018] The distance between the third edge and the fifth wall is 0.5mm to 3mm, and the distance between the fourth edge and the sixth wall is 0.5mm to 3mm to reduce the risk of interference between the third component and the second recess and facilitate the connection between the third component and the pole.

[0019] In some embodiments of the application, the battery cell further includes a support connected to the shell and protruding out of the top wall along the second direction. The support is arranged opposite to the protection plate along the first direction, and the protection plate is connected to the support to improve the stability of the protection plate on the top wall.

[0020] In some embodiments of the present application, the protection plate comprises a substrate and a flexible circuit board connected to the substrate. The substrate is located on one side of the support along the first direction, and the substrate comprises a first region and a second region. The first region is connected to the support, and the projection of the second region is separated from the projection of the support along the first direction. The flexible circuit board comprises a fourth part, and the fourth part is located on the side of the substrate facing the support. The projection of the fourth part overlaps the projection of the second region along the first direction, and the projection of the fourth part is separated from the projection of the support. The support and the flexible circuit board share the space in the first direction, which is conducive to improving the space utilization of the circuit board assembly on the top wall.

[0021] In some embodiments of the present application, the battery further comprises a protective glue. The protective glue fills the first accommodating space and covers the fifth member, and / or the protective glue fills the second accommodating space and covers the seventh member, so as to fix the fifth member in the first accommodating space or fix the seventh member in the second accommodating space, thereby improving the stability of the circuit board assembly on the top wall.

[0022] In some embodiments of the present application, the battery further comprises a first insulating member. At least part of the first insulating member is located between the second adapter and the shell, so as to improve the stability of the insulation between the second adapter and the shell.

[0023] In some embodiments of the present application, the first insulating member is formed by curing the insulating glue coated on the shell. The first insulating member comprises a first insulating part, a second insulating part and a third insulating part. The first insulating part is arranged in the second recess and located on the circumferential side of the pole, so as to play the role of insulation and buffering on the second recess, and reduce the risk of short circuit caused by interference between the second adapter and the second recess. The second insulating part is arranged between the protection plate and the top wall, so as to improve the insulation stability between the protection plate and the top wall. The third insulating part is arranged between the second adapter and the top wall, so as to improve the insulation stability between the second adapter and the top wall.

[0024] In some embodiments of the present application, the battery further comprises a second insulating member. The second insulating member extends from the side of the protection plate away from the top wall to the first side wall and the second side wall, and the second insulating member also covers the second accommodating space, so as to protect the pole and the second adapter located in the second accommodating space.

[0025] In some embodiments of the present application, the protection plate comprises a flexible circuit board, and the second insulating member is provided with a communication port. The flexible circuit board extends from the communication port, so as to facilitate the connection of the flexible circuit board to the mainboard of the external terminal device or other external circuits.

[0026] Embodiments of the present application also provide a terminal device, which comprises the battery of any one of the above-mentioned embodiments.

[0027] In the battery and the terminal device, one end of the pole post is electrically connected to the electrode assembly, and the other end of the pole post extends into the second accommodating space to reduce the space occupied by the pole post in the length direction of the battery cell. The protection plate is arranged on the top wall, one end of the second adapter extends into the second accommodating space from the second opening and is connected to the pole post, and the other end of the second adapter is connected to the protection plate to reduce the size of the protection plate and the pole post stacked on the top wall, which is beneficial to reduce the packaging length of the battery and further improve the energy density of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0028] FIG. 1 is a structural schematic diagram of a battery in an embodiment of the present application.

[0029] FIG. 2 is a structural schematic diagram of a circuit board assembly and a top wall of a battery in an embodiment of the present application.

[0030] FIG. 3 is a disassembled structural schematic diagram of a battery cell in an embodiment of the present application.

[0031] FIG. 4 is a structural schematic diagram of a second insulating piece of a battery in an embodiment of the present application.

[0032] FIG. 5 is a structural schematic diagram of a battery in another embodiment of the present application.

[0033] FIG. 6 is a structural schematic diagram of an injection molding piece and a top wall of a battery in an embodiment of the present application.

[0034] FIG. 7 is a structural schematic diagram of a battery in another embodiment of the present application.

[0035] FIG. 8 is a structural schematic diagram of a circuit board assembly and a top wall of a battery in an embodiment of the present application.

[0036] FIG. 9 is a structural schematic diagram of a support piece and a protection plate of a battery in an embodiment of the present application.

[0037] FIG. 10 is a structural schematic diagram of a second insulating piece of a battery in an embodiment of the present application.

[0038] FIG. 11 is a structural schematic diagram of a terminal device in an embodiment of the present application.

[0039] Main element symbol explanation Battery 100A, 100B, 100C Terminal device 200 Cell 10 Electrode assembly 20 Tab group 21 First concave surface 211 First inner surface 211A Second inner surface 211B Second concave surface 212 Third inner surface 212A Fourth inner surface 212B First tab 22 Second tab 23 Housing 30 Top wall 31 First opening 311 Second opening 312 First side wall 32 Main body part 321 First recess 322 First accommodation space 32A First wall 322A Second wall 322B Third wall 322C First transition wall 322D Second recess 323 Second accommodation space 32B Fourth wall 323A Fifth wall 323B Sixth wall 323C Second transition wall 323D Second side wall 33 Bottom wall 34 Third side wall 35 Third opening 351 Fourth side wall 36 Fourth opening 361 Pole column 40 Circuit board assembly50 protection plate 51 substrate 511 first area 511A second area 511B flexible circuit board 512 first part 512A first section 5121 second section 5122 second part 512B third part 512C first bending part 512D connector 512E fourth part 512F fifth part 512G sixth part 512H second bending part 512I reinforcing plate 512J first adapter 52 first member 521 second member 522 first connecting part 523 fifth member 524 sixth member 525 third connecting part 526 second adapter 53 third member 531 first edge 531A second edge 531B fourth member 532 second connecting part 533 seventh member 534 third edge 534A fourth edge 534B eighth member 535 fourth connecting part 536 first insulating member 60 first insulating part 61 second insulating part 62 third insulating part 63 injection molding70 first surface 71 second surface 72 third surface 73 second insulating member 80 communication port 80A first sub-communication port 80A1 second sub-communication port 80A2 first connection region 81 first sub-connection region 811, 81A second sub-connection region 812, 81B second connection region 82 third connection region 83 fourth connection region 84 support member 90 protective adhesive 95 first direction X second direction Z third direction Y

[0040] The following detailed description will further describe the present application with reference to the above mentioned drawings. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0042] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or a middle element can be present at the same time. When an element is considered to be "arranged" on another element, it can be directly arranged on the other element or a middle element can be present at the same time. It should be understood that, considering the actual processing tolerance, when two elements are arranged in the same direction in the technical solutions of the present application, a certain angle can exist between the two elements, and the angle between the two elements is allowed to exist within a tolerance of 0-±10%.

[0043] When a value is considered "equal" to another value, it means that both are equal within a set deviation, which is within 10%, that is, even if the values are not equal, they are considered approximately equal when at least one of them fluctuates within the set deviation. When a value is considered to be in a ratio of "1:1" to another value, it means that both are equal within a set deviation, which is within 10%, that is, even if the values are not equal, they are considered to be in a ratio of equal when at least one of them fluctuates within the set deviation.

[0044] 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 in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the term "overlap" means that the projected portions of two components overlap or the projections of two components coincide.

[0045] An embodiment of the present application provides a battery, which includes a battery cell and a circuit board assembly. The battery cell includes an electrode assembly, a case, and a post. The case includes a top wall and first and second side walls connected to both sides of the top wall in a first direction. The first direction is a thickness direction of the battery cell. The first side wall includes a main body portion, and first and second recessed portions connected to the main body portion. The first recessed portion is recessed toward the second side wall with respect to the main body portion to form a first accommodation space, and the second recessed portion is recessed toward the second side wall with respect to the main body portion to form a second accommodation space. The top wall is provided with a first opening communicating with the first accommodation space and a second opening communicating with the second accommodation space. The electrode assembly is disposed in the case, the first recessed portion is electrically connected to the electrode assembly, and the post is connected to the second recessed portion and disposed in insulation with the second recessed portion. One end of the post is electrically connected to the electrode assembly, and the other end of the post extends into the second accommodation space. The polarity of the first recessed portion is opposite to that of the post. The circuit board assembly includes a protection plate, a first adapter, and a second adapter. The protection plate is disposed on the top wall. One end of the first adapter extends into the first accommodation space from the first opening and is connected to the first recessed portion, and the other end of the first adapter is connected to the protection plate. One end of the second adapter extends into the second accommodation space from the second opening and is connected to the post, and the other end of the second adapter is connected to the protection plate.

[0046] The one end of the pole is electrically connected with the electrode assembly, and the other end of the pole extends into the second accommodating space, so as to reduce the space occupied by the pole in the length direction of the battery cell. The protection plate is arranged on the top wall, one end of the second adapter extends into the second accommodating space from the second opening and is connected with the pole, and the other end of the second adapter is connected with the protection plate, so as to reduce the size of the protection plate and the pole stacked on the top wall, which is beneficial to reduce the packaging length of the battery and further improve the energy density of the battery.

[0047] Embodiment one

[0048] Please refer to FIG. 1 and FIG. 2, an embodiment of the present application provides a battery 100A, which comprises a battery cell 10 and a circuit board assembly 50. The battery 100A can be but is not limited to a secondary battery, which refers to a battery that can be activated by charging after discharging to continue to be used.

[0049] Please refer to FIG. 3, the battery cell 10 comprises an electrode assembly 20, a shell 30 and a pole 40. The shell 30 comprises a top wall 31 and first and second side walls 32 and 33 connected to both sides of the top wall 31 in a first direction X. The first direction X is the thickness direction of the battery cell 10. The shell 30 is made of a metal material and has a conductive property, and the metal elements of the metal material include at least one of Mg, Al, Zn, Fe, Sn, Cu, Ag, Pt, Au, Mn.

[0050] The first side wall 32 comprises a main body part 321 and first and second recessed parts 322 and 323 connected to the main body part 321. The main body part 321 is in the form of a flat plate. The first recessed part 322 is recessed towards the second side wall 33 relative to the main body part 321 to form a first accommodating space 32A, and the second recessed part 323 is recessed towards the second side wall 33 relative to the main body part 321 to form a second accommodating space 32B. The top wall 31 is provided with a first opening 311 communicating with the first accommodating space 32A and a second opening 312 communicating with the second accommodating space 32B.

[0051] The electrode assembly 20 is arranged in the shell 30, and the electrode assembly 20 is used to convert chemical energy into electrical energy. The first recessed part 322 is electrically connected with the electrode assembly 20. The pole 40 is connected with the second recessed part 323 and is arranged in insulation with the second recessed part 323. One end of the pole 40 is electrically connected with the electrode assembly 20, and the other end of the pole 40 extends into the second accommodating space 32B. Compared with the existing mode that the pole protrudes out of the top wall of the shell, the pole 40 can reduce the space occupied by the pole in the length direction of the battery cell 10.

[0052] Specifically, the other end of the pole post 40 extending into the second accommodating space 32B means that the projection of the part of the pole post 40 extending into the second accommodating space 32B in the first direction X is located within the projection of the second recess 323, and the end of the pole post 40 extending into the second accommodating space 32B does not exceed the main body portion 321 in the first direction X.

[0053] Optionally, the pole post 40 extends into the second accommodating space 32B in the first direction X, and the end of the pole post 40 extending into the second accommodating space 32B does not exceed the main body portion 321 in the first direction X; or the pole post 40 extends into the second accommodating space 32B in a direction inclined to the first direction X.

[0054] The polarity of the first recess 322 is opposite to the polarity of the pole post 40. Optionally, the first recess 322 has a positive polarity and the pole post 40 has a negative polarity; or the first recess 322 has a negative polarity and the pole post 40 has a positive polarity.

[0055] Please refer to FIG. 1 and FIG. 2 together, 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 top wall 31, one end of the first adapter 52 extends into the first accommodating space 32A from the first opening 311 and is connected to the first recess 322, and the other end of the first adapter 52 is connected to the protection plate 51. One end of the second adapter 53 extends into the second accommodating space 32B from the second opening 312 and is connected to the pole post 40, and the other end of the second adapter 53 is connected to the protection plate 51. The first adapter 52 and the second adapter 53 are used to electrically connect the protection plate 51 and the electrode assembly 20. Moreover, compared with the existing mode that the pole post protrudes out of the top wall of the shell, the size of the protection plate 51 and the pole post 40 stacked on the top wall 31 can be reduced, which is beneficial to reduce the packaging length of the battery 100A, and further improve the energy density of the battery 100A.

[0056] In the above battery 100A, one end of the pole post 40 is electrically connected to the electrode assembly 20, and the other end of the pole post 40 extends into the second accommodating space 32B, so as to reduce the space occupied by the pole post 40 in the length direction of the battery cell 10. The protection plate 51 is arranged on the top wall 31, one end of the second adapter 53 extends into the second accommodating space 32B from the second opening 312 and is connected to the pole post 40, and the other end of the second adapter 53 is connected to the protection plate 51, so as to reduce the size of the protection plate 51 and the pole post 40 stacked on the top wall 31, which is beneficial to reduce the packaging length of the battery 100A, and further improve the energy density of the battery 100A.

[0057] Please continue to refer to FIG. 3, in some embodiments, the electrode assembly 20 includes the tab group 21, the first tab 22 and the second tab 23. The tab group 11 includes the positive electrode tab, the separator and the negative electrode tab arranged in sequence. Optionally, the positive electrode tab, the separator and the negative electrode tab are in a laminated structure. The polarity of the first tab 22 is opposite to the polarity of the second tab 23.

[0058] The tab group 21 is provided with the first concave surface 211 and the second concave surface 212. In the first direction X, the projection of the first recess 322 is located within the projection of the first concave surface 211, and the projection of the second recess 323 is located within the projection of the second concave surface 212, so that the shape of the tab group 21 is adapted to the shape of the shell 30, the space utilization of the tab group 21 in the shell 30 is improved, and the energy density of the battery 100A is improved.

[0059] The first tab 22 extends from the first concave surface 211, and the first tab 22 is located between the first recess 322 and the second side wall 33. The first tab 22 is connected to the first recess 322, so that the first recess 322 is electrically connected to the electrode assembly 20 and has the same polarity as the first tab 22.

[0060] The second tab 23 extends from the second concave surface 212, and the second tab 23 is located between the second recess 323 and the second side wall 33. The second tab 23 is connected to the part of the pole 40 extending into the shell 30, so that the pole 40 is electrically connected to the electrode assembly 20 and has the same polarity as the second tab 23.

[0061] Compared with the existing method of reserving a large space between the end surface of the tab group and the top wall of the shell to accommodate the tab and part of the pole, the connection between the first tab 22 and the first recess 322 shares the space in the first direction X and the length direction of the battery 100A with the tab group 21, and the connection between the second tab 23 and the pole 40 shares the space in the first direction X and the length direction of the battery 100A with the tab group 21, which is beneficial to improve the energy density of the battery 100A.

[0062] In some embodiments, the extension direction of the first tab 22 is perpendicular to the first direction X, so as to accommodate the first tab 22 between the first recess 322 and the second side wall 33, and to improve the connection area between the first tab 22 and the first recess 322, thereby improving the stability of the connection between the first tab 22 and the first recess 322.

[0063] In some embodiments, the extension direction of the second tab 23 is perpendicular to the first direction X, so as to accommodate the second tab 23 between the second recess 323 and the second side wall 33, and to reduce the risk of interference between the second tab 23 and the shell 30.

[0064] Please continue to refer to FIG. 1. In some embodiments, the shell 30 further comprises a bottom wall 34, a third side wall 35 and a fourth side wall 36. The top wall 31 and the bottom wall 34 are oppositely arranged along a second direction Z. The first side wall 32, the third side wall 35, the second side wall 33 and the fourth side wall 36 are connected end to end and between the top wall 31 and the bottom wall 34 to form a space for accommodating the electrode assembly 20. The third side wall 35 and the fourth side wall 36 are oppositely arranged along a third direction Y. The first direction X, the second direction Z and the third direction Y are perpendicular to each other. Among them, the second direction Z is the length direction of the battery cell 10, and the third direction Y is the width direction of the battery cell 10.

[0065] The third side wall 35 is provided with a third opening 351 communicating with the first accommodating space 32A, and the fourth side wall 36 is provided with a fourth opening 361 communicating with the second accommodating space 32B, so that the first recess 322 and the second recess 323 are located at two corner positions of the shell 30, which is beneficial to the position of the first recess 322 and the second recess 323 to adapt to the position of the first adapter 52 and the second adapter 53 respectively.

[0066] Optionally, the corners of the shell 30 are all provided with rounded corners to reduce the risk of contact damage to other structural members caused by the shell 30.

[0067] Please refer to FIGS. 2 and 3 together. In some embodiments, the first recess 322 comprises a first wall 322A, a second wall 322B and a third wall 322C. The first wall 322A and the second side wall 33 are oppositely arranged along the first direction X, and the second wall 322B and the third wall 322C are connected between the first wall 322A and the main body part 321. As viewed along the first direction X, the second wall 322B is connected to the top wall 31 and extends toward the bottom wall 34, and the third wall 322C is connected to the third side wall 35 and extends toward the fourth side wall 36.

[0068] As viewed along the first direction X, the extension profile line of the second wall 322B and the third wall 322C is a straight line, an arc or a combination of a straight line and an arc. Optionally, the second wall 322B extends along the second direction Z, and the third wall 322C extends along the third direction Y.

[0069] In some embodiments, the first recess 322 comprises a first inner surface 211A and a second inner surface 211B. The first inner surface 211A extends along the second direction Z, and the second inner surface 211B extends along the third direction Y. The first inner surface 211A is oppositely arranged with the second wall 322B along the third direction Y, and the second inner surface 211B is oppositely arranged with the third wall 322C along the second direction Z. Optionally, the first tab 22 extends out of the first inner surface 211A along the third direction Y; or the first tab 22 extends out of the second inner surface 211B along the second direction Z.

[0070] In some embodiments, the first recess 322 further comprises a first transition wall 322D connected between the second wall 322B and the third wall 322C. When viewed along the first direction X, the first transition wall 322D has an extending profile in an arc line, and an axis of the arc line extends along the first direction X, so as to reduce the risk of stress concentration at the joint between the second wall 322B and the third wall 322C.

[0071] Referring to FIGS. 2 and 3, in some embodiments, the second recess 323 comprises a fourth wall 323A and a second side wall 33 oppositely arranged along the first direction X, and a fifth wall 323B and a sixth wall 323C connected between the fourth wall 323A and the main body 321. When viewed along the first direction X, the fifth wall 323B is connected to the top wall 31 and extends towards the bottom wall 34, and the sixth wall 323C is connected to the fourth side wall 36 and extends towards the third side wall 35.

[0072] When viewed along the first direction X, the fifth wall 323B and the sixth wall 323C have an extending profile in a straight line, an arc line, or a combination of a straight line and an arc line. Optionally, the fifth wall 323B extends along the second direction Z, and the sixth wall 323C extends along the third direction Y.

[0073] In some embodiments, the second recess 323 further comprises a second transition wall 323D connected between the fifth wall 323B and the sixth wall 323C. When viewed along the first direction X, the second transition wall 323D has an extending profile in an arc line, and an axis of the arc line extends along the first direction X, so as to reduce the risk of stress concentration at the joint between the fifth wall 323B and the sixth wall 323C.

[0074] In some embodiments, the second recess 323 further comprises a second transition wall 323D connected between the fifth wall 323B and the sixth wall 323C. When viewed along the first direction X, the second transition wall 323D has an extending profile in an arc line, and an axis of the arc line extends along the first direction X, so as to reduce the risk of stress concentration at the joint between the fifth wall 323B and the sixth wall 323C.

[0075] Referring to FIGS. 1 and 2, 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 top wall 31 are oppositely arranged along the second direction Z, so as to reduce the space occupied by the protection plate 51 in the second direction Z, and facilitate reducing the packaging length of the battery 100A, and further improving the energy density of the battery 100A.

[0076] The first adapter 52 includes a first member 521, a second member 522, and a first connecting portion 523. The first member 521 is disposed opposite to the first wall 322A along the first direction X and is electrically connected to the first wall 322A. The second member 522 is disposed opposite to the protection plate 51 along the second direction Z and is electrically connected to the protection plate 51. The first connecting portion 523 is connected between the first member 521 and the second member 522. Specifically, the first member 521 is attached to the first wall 322A, and / or the second member 522 is attached to the protection plate 51, so as to improve the stability of the first adapter 52 connected to the first recess 322 and the protection plate 51.

[0077] Optionally, the first member 521, the second member 522, and the first connecting portion 523 are integrally formed.

[0078] The second adapter 53 includes a third member 531, a fourth member 532, and a second connecting portion 533. The third member 531 is disposed opposite to the fourth wall 323A along the first direction X and is electrically connected to the pole 40. The fourth member 532 is disposed opposite to the protection plate 51 along the second direction Z and is electrically connected to the protection plate 51. The second connecting portion 533 is connected between the third member 531 and the fourth member 532. Specifically, the third member 531 is attached to the end surface of the pole 40, and / or the fourth member 532 is attached to the protection plate 51, so as to improve the stability of the second adapter 53 connected to the pole 40 and the protection plate 51.

[0079] Optionally, the third member 531, the fourth member 532, and the second connecting portion 533 are integrally formed.

[0080] In some embodiments, as viewed along the second direction Z, the protection plate 51 is located between the first recess 322 and the second recess 323 in the third direction Y. As viewed along the second direction Z, the projection of the first connecting portion 523 is spaced apart from the projection of the protection plate 51, and the projection of the second connecting portion 533 is spaced apart from the projection of the protection plate 51, so as to facilitate the first member 521 to extend into the first accommodation space 32A from the first opening 311, and to facilitate the third member 531 to extend into the second accommodation space 32B from the second opening 312.

[0081] Please refer to FIG. 1 and FIG. 2 together, in some embodiments, as viewed along the first direction X, the third member 531 includes a first edge 531A and a second edge 531B. The first edge 531A is disposed opposite to the fifth wall 323B and is spaced apart from the fifth wall 323B, and the second edge 531B is disposed opposite to the sixth wall 323C and is spaced apart from the sixth wall 323C, so as to form a buffer gap between the first edge 531A and the fifth wall 323B and between the second edge 531B and the sixth wall 323C. The risk of short circuit caused by the interference between the third member 531 and the second recess 323 is reduced when the battery 100A is impacted by external force.

[0082] In some embodiments, the distance between the first edge 531A and the fifth wall 323B is 0.5mm to 3mm. When the distance is small (less than 0.5mm), the first edge 531A and the fifth wall 323B are prone to interference. When the distance is large (greater than 3mm), it will cause the third member 531 to be small in size in the second accommodating space 32B, which is not conducive to the connection of the third member 531 with the pole 40. By limiting the distance between the first edge 531A and the fifth wall 323B to 0.5mm to 3mm, the risk of interference between the first edge 531A and the fifth wall 323B is reduced, and the connection of the third member 531 with the pole 40 is facilitated.

[0083] Optionally, the distance between the first edge 531A and the fifth wall 323B is one of 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, and any other value within the range of 0.5mm to 3mm.

[0084] In some embodiments, the distance between the second edge 531B and the sixth wall 323C is 0.5mm to 3mm. When the distance is small (less than 0.5mm), the second edge 531B and the sixth wall 323C are prone to interference. When the distance is large (greater than 3mm), it will cause the third member 531 to be small in size in the second accommodating space 32B, which is not conducive to the connection of the third member 531 with the pole 40. By limiting the distance between the second edge 531B and the sixth wall 323C to 0.5mm to 3mm, the risk of interference between the second edge 531B and the fifth wall 323B is reduced, and the connection of the third member 531 with the pole 40 is facilitated.

[0085] Optionally, the distance between the second edge 531B and the sixth wall 323C is one of 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, and any other value within the range of 0.5mm to 3mm.

[0086] Referring to FIGS. 1 and 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 top wall 31 along the second 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 the side of the substrate 511 away from the top wall 31. One end of the flexible circuit board 512 away from the substrate 511 is used to connect the mainboard of the external terminal device or other external circuit.

[0087] In some embodiments, the flexible circuit board 512 extends to the side of the substrate 511 away from the top wall 31 after being bent from the side of the substrate 511 towards the top wall 31.

[0088] Optionally, the protection plate 51 is a rigid-flexible combined plate.

[0089] Please refer to FIG. 1 and FIG. 2, in some embodiments, the battery 100A further comprises a first insulation member 60, at least part of the first insulation member 60 is located between the second adapter 53 and the shell 30, so as to improve the stability of the insulation between the second adapter 53 and the shell 30.

[0090] In some embodiments, the first insulation member 60 is formed by curing the insulation glue coated on the shell 30. The first insulation member 60 comprises a first insulation part 61, a second insulation part 62 and a third insulation part 63. The first insulation part 61 is arranged on the second recess 323 and located on the circumferential side of the pole 40, so as to play the role of insulation and buffering on the second recess 323, and reduce the risk of short circuit caused by the interference between the second adapter 53 and the second recess 323. Specifically, the first insulation part 61 covers the fourth wall 323A, the fifth wall 323B and the sixth wall 323C. The second insulation part 62 is arranged between the protection plate 51 and the top wall 31, so as to improve the insulation stability between the protection plate 51 and the top wall 31. The third insulation part 63 is arranged between the second adapter 53 and the top wall 31, so as to improve the insulation stability between the second adapter 53 and the top wall 31.

[0091] Please refer to FIG. 1 and FIG. 4, in some embodiments, the battery 100A further comprises a second insulation member 80, the second insulation member 80 extends from the side of the protection plate 51 away from the top wall 31 to the first side wall 32 and the second side wall 33, so as to improve the stability of the circuit board assembly 50 on the top wall 31. The second insulation member 80 also covers the second accommodating space 32B, so as to protect the pole 40 and the second adapter 53 located in the second accommodating space 32B.

[0092] In some embodiments, the second insulation member 80 is provided with a communication port 80A, and the flexible circuit board 512 extends out of the communication port 80A, so as to facilitate the connection of the flexible circuit board 512 to the main board of the external terminal device or other external circuit.

[0093] In some embodiments, the second insulating member 80 includes a first connecting region 81, a second connecting region 82, a third connecting region 83, and a fourth connecting region 84. The first connecting region 81 is connected to the substrate 511 away from the top wall 31 and covers the second opening 312. The second connecting region 82 connects the first connecting region 81 and the first side wall 32 and covers the second recess 323. The third connecting region 83 connects the first connecting region 81 and the second side wall 33. The fourth connecting region 84 connects the first connecting region 81 and the fourth side wall 36 and covers the fourth opening 361. The first connecting region 81, the second connecting region 82, and the fourth connecting region 84 cooperatively cover the second accommodating space 32B. The communication port 80A includes a first sub-communication port 80A1 and a second sub-communication port 80A2, the first sub-communication port 80A1 is formed on the first connecting region 81, and the second sub-communication port 80A2 is formed on the second connecting region 82. The first sub-communication port 80A1 and the second sub-communication port 80A2 are in communication with each other. The first connecting region 81 includes a first sub-connecting region 811 and a second sub-connecting region 812 arranged along the third direction Y, the first sub-communication port 80A1 is located between the first sub-connecting region 811 and the second sub-connecting region 812, the first sub-connecting region 811 covers the substrate 511, and the second sub-connecting region 812 covers the second opening 312.

[0094] In some embodiments, as viewed along the third direction Y, the second connecting region 82 has a greater extension length in the second direction Z than the third connecting region 83, and the fourth connecting region 84 is obliquely arranged away from the edge of the first connecting region 81 to reduce the amount of the second insulating member 80 on the second side wall 33 while achieving protection.

[0095] Optionally, the second insulating member 80 is adhesive tape.

[0096] Embodiment Two

[0097] Please refer to FIG. 5 and FIG. 6 together, an embodiment of the present application further provides a battery 100B. The battery 100B is different from the battery 100A in the structure of the flexible circuit board 512.

[0098] The flexible circuit board 512 includes a first portion 512A, a second portion 512B, a third portion 512C, and a first bending portion 512D. The first portion 512A includes a first segment 5121 and a second segment 5122, and the first segment 5121 is connected to the substrate 511 away from the side of the top wall 31. The projection of the second segment 5122 is away from the projection of the substrate 511 along the second direction Z. The second portion 512B is located away from the substrate 511 from the side of the first portion 512A along the second direction Z. The first bending portion 512D is connected between the second segment 5122 and the second portion 512B. The third portion 512C extends away from the substrate 511 from the side of the second portion 512B, and the third portion 512C is provided with a connector 512E for connecting a main board of an external terminal device or other external circuit.

[0099] Please refer to FIG. 5 and FIG. 6, in some embodiments, the battery 100B further includes an injection molding piece 70 connected to the top wall 31 and the circuit board assembly 50 to improve the stability of the circuit board assembly 50 on the top wall 31. In addition, the injection molding piece 70 can play a buffering role to improve the impact resistance of the battery 100B.

[0100] It can be understood that the injection molding piece 70 can replace the second insulating piece 80 in the battery 100A, or the second insulating piece 80 of the battery 100A covers the injection molding piece 70.

[0101] In some embodiments, the injection molding piece 70 covers the first adapter 52, the second adapter 53, the substrate 511, and the part of the flexible circuit board 512 connected to the substrate 511.

[0102] For the part of the first adapter 52 located in the first recess 322, the injection molding piece 70 is filled in the first accommodation space 32A and is away from the connection between the first member 521 and the first wall 322A to fix the first member 521 in the first accommodation space 32A.

[0103] For the part of the second adapter 53 located in the second recess 323, the injection molding piece 70 fills the gap between the third member 531 and the fourth wall 323A, the gap between the first edge 531A and the fifth wall 323B, and the gap between the second edge 531B and the sixth wall 323C to fix the third member 531 in the second accommodation space 32B, and reduce the risk of short circuit caused by interference between the second adapter 53 and the second recess 323.

[0104] For the part where the flexible circuit board 512 is connected to the substrate 511, the injection molding 70 covers the first section 5121 to improve the stability of the connection between the flexible circuit board 512 and the substrate 511. The second part 512B, the third part 512C, the first bending part 512D and at least part of the second section 5122 are exposed to the injection molding 70 to facilitate the connection of the flexible circuit board 512 to the main board of the external terminal device or other external circuit.

[0105] Please refer to FIG. 5 and FIG. 6, in some embodiments, the injection molding 70 comprises a first face 71, a second face 72 and a third face 73. The first face 71 and the second face 72 are arranged along the third direction Y when viewed along the second direction Z. The distance between the second face 72 and the top wall 31 is smaller than the distance between the first face 71 and the top wall 31 along the second direction Z. The third face 73 is connected between the first face 71 and the second face 72, and the second section 5122 extends from the third face 73 to reduce the risk of the injection molding 70 interfering with the connection of the flexible circuit board 512 to the external circuit.

[0106] Optionally, the injection molding 70 is formed by injection molding or potting with at least one material selected from the group consisting of polyamide, silicone resin and rubber.

[0107] In addition to the above differences, the parameters of the battery 100B are substantially the same as those of the battery 100A, and the above description of the battery 100A can be referred to.

[0108] Embodiment Three

[0109] Please refer to FIG. 7 and FIG. 8, an embodiment of the present application further provides a battery 100C. The battery 100C differs from the battery 100A in that the structure of the circuit board assembly 50 is different.

[0110] The thickness direction of the protection plate 51 is the first direction X, and the protection plate 51 is perpendicular to the top wall 31 to facilitate increasing the arrangement space of the protection plate 51 in the thickness direction thereof.

[0111] The first adapter 52 comprises a fifth component 524, a sixth component 525 and a third connecting part 526. The fifth component 524 is arranged opposite to the first wall 322A along the first direction X and is electrically connected to the first wall 322A. The sixth component 525 is arranged opposite to the protection plate 51 along the first direction X and is electrically connected to the protection plate 51. The third connecting part 526 is connected between the fifth component 524 and the sixth component 525. Specifically, the fifth component 524 is attached to the first wall 322A, and / or the sixth component 525 is attached to the protection plate 51 to facilitate improving the stability of the connection of the first adapter 52 to the first recess 322 and the protection plate 51.

[0112] Optionally, the fifth component 524, the sixth component 525 and the third connecting part 526 are integrally formed.

[0113] The second adapter 53 includes a seventh member 534, an eighth member 535, and a fourth connecting portion 536. The seventh member 534 is arranged opposite to the fourth wall 323A along the first direction X and is electrically connected to the pole 40. The eighth member 535 is arranged opposite to the protection plate 51 along the first direction X and is electrically connected to the protection plate 51. The fourth connecting portion 536 is connected between the seventh member 534 and the eighth member 535. Specifically, the seventh member 534 is attached to the end surface of the pole 40, and / or the eighth member 535 is attached to the protection plate 51, so as to improve the stability of the second adapter 53 connected to the pole 40 and the protection plate 51.

[0114] Optionally, the seventh member 534, the eighth member 535, and the fourth connecting portion 536 are integrally formed.

[0115] Please refer to FIG. 7 and FIG. 8 together, in some embodiments, as viewed along the second direction Z, the protection plate 51 is located between the first recess 322 and the second recess 323 along the third direction Y. As viewed along the second direction Z, the projection of the third connecting portion 526 is separated from the projection of the protection plate 51, and the projection of the fourth connecting portion 536 is separated from the projection of the protection plate 51, so as to facilitate the fifth member 524 to extend into the first accommodating space 32A from the first opening 311, and to facilitate the seventh member 534 to extend into the second accommodating space 32B from the second opening 312.

[0116] Please refer to FIG. 7 and FIG. 8 together, in some embodiments, as viewed along the first direction X, the seventh member 534 includes a third edge 534A and a fourth edge 534B. The third edge 534A is arranged towards the fifth wall 323B and is spaced apart from the fifth wall 323B, and the fourth edge 534B is arranged towards the sixth wall 323C and is spaced apart from the sixth wall 323C, so as to form a buffer gap between the third edge 534A and the fifth wall 323B and between the fourth edge 534B and the sixth wall 323C. This reduces the risk of short circuit caused by the third member 531 interfering with the second recess 323 when the battery 100C is impacted by external force.

[0117] In some embodiments, the distance between the third edge 534A and the fifth wall 323B is 0.5mm to 3mm. When the distance is small (less than 0.5mm), the third edge 534A and the fifth wall 323B are prone to interference. When the distance is large (greater than 3mm), it will cause the third member 531 to have a small size in the second accommodating space 32B, which is not conducive to the connection of the third member 531 and the pole 40. By limiting the distance between the third edge 534A and the fifth wall 323B to 0.5mm to 3mm, the risk of interference between the third edge 534A and the fifth wall 323B is reduced, and the connection of the third member 531 and the pole 40 is facilitated.

[0118] Optionally, the distance between the third edge 534A and the fifth wall 323B is one of 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, and any other value within the range from 0.5 mm to 3 mm.

[0119] In some embodiments, the distance between the fourth edge 534B and the sixth wall 323C is 0.5 mm to 3 mm. When the distance is too small (less than 0.5 mm), the fourth edge 534B and the sixth wall 323C are likely to interfere with each other. When the distance is too large (greater than 3 mm), the third member 531 is likely to be too small in the second accommodating space 32B, which is not conducive to the connection between the third member 531 and the pole 40. By limiting the distance between the fourth edge 534B and the sixth wall 323C to 0.5 mm to 3 mm, the risk of interference between the fourth edge 534B and the fifth wall 323B is reduced, and the connection between the third member 531 and the pole 40 is facilitated.

[0120] Optionally, the distance between the fourth edge 534B and the sixth wall 323C is one of 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, and any other value within the range from 0.5 mm to 3 mm.

[0121] Referring to FIGS. 7 and 8, in some embodiments, the battery 100C further includes a support 90 connected to the housing 30 and protruding out of the top wall 31 along the second direction Z. The support 90 is arranged opposite to the at least partially protective plate 51 along the first direction X, and the protective plate 51 is connected to the support 90 to improve the stability of the protective plate 51 on the top wall 31.

[0122] The substrate 511 is located on one side of the support 90 along the first direction X. The substrate 511 includes a first region 511A and a second region 511B. The first region 511A is connected to the support 90, and the projection of the second region 511B along the first direction X is separate from the projection of the support 90.

[0123] In some embodiments, the support 90 is integrally formed with the second side wall 33.

[0124] Referring to FIGS. 7 and 9, in some embodiments, the flexible circuit board 512 includes a fourth portion 512F, a fifth portion 512G, a sixth portion 512H, and a second bending portion 512I. The fourth portion 512F is located on the side of the substrate 511 facing the support 90, and the projection of the fourth portion 512F along the first direction X overlaps the projection of the second region 511B and is separate from the projection of the support 90. The fifth portion 512G is connected to the substrate 511 and protrudes out of the substrate 511 along the third direction Y. The second bending portion 512I is connected between the fifth portion 512G and the fourth portion 512F.

[0125] The sixth part 512H extends from the fourth part 512F away from the side of the top wall 31, and the sixth part 512H is provided with a connector 512E and a reinforcing plate 512J on both sides in the thickness direction, and the projections of the connector 512E and the reinforcing plate 512J overlap in the thickness direction of the sixth part 512H. The connector 512E is used to connect the main board of the external terminal device or other external circuits, and the reinforcing plate 512J is used to enhance the structural strength of the sixth part 512H to facilitate the support of the connector 512E. The support 90 shares the space in the first direction X with the flexible circuit board 512, which is conducive to improving the space utilization of the circuit board assembly 50 on the top wall 31.

[0126] Please refer to FIG. 7 and FIG. 8, the battery 100C further comprises a protective glue 95, the protective glue 95 fills the first accommodating space 32A and covers the fifth member 524, and / or the protective glue 95 fills the second accommodating space 32B and covers the seventh member 534, so as to fix the fifth member 524 in the first accommodating space 32A or fix the seventh member 534 in the second accommodating space 32B, thereby improving the stability of the circuit board assembly 50 on the top wall 31.

[0127] Please refer to FIG. 7 and FIG. 10, in some embodiments, the second insulating member 80 extends from the protective plate 51 away from the side of the top wall 31 to the first side wall 32, the second side wall 33 and the support 90, so as to improve the stability of the circuit board assembly 50 on the top wall 31. The second insulating member 80 also covers the second accommodating space 32B, so as to protect the pole 40 and the second adapter 53 in the second accommodating space 32B.

[0128] In some embodiments, the second insulating member 80 is provided with a communication port 80A, and the flexible circuit board 512 extends from the communication port 80A, so as to facilitate the connection of the flexible circuit board 512 to the main board of the external terminal device or other external circuits.

[0129] In some embodiments, the second insulation member 80 includes a first connecting region 81, a second connecting region 82, a third connecting region 83, and a fourth connecting region 84. The first connecting region 81 is connected to the side of the protection plate 51 away from the top wall 31 and covers the second opening 312. The second connecting region 82 connects the first connecting region 81 and the first side wall 32 and covers the second recess 323. The third connecting region 83 connects the first connecting region 81, the second side wall 33, and the support member 90. At least part of the communication port 80A is formed on the third connecting region 83. Specifically, the second bending portion 512I extends from the communication port 80A, the fourth portion 512F is arranged opposite to the third connecting region 83, and the fifth portion 512G is connected to the base plate 511 and protrudes out of the first connecting region 81 along the third direction Y. The first connecting region 81 includes a first sub-connecting region 81A and a second sub-connecting region 81B, the communication port 80A is located between the first sub-connecting region 81A and the second sub-connecting region 81B, the first sub-connecting region 81A is connected to the side of the protection plate 51 away from the top wall 31 and covers the second opening 312, and the second sub-connecting region 81B covers the first opening 311.

[0130] In some embodiments, the third connecting region 83 connects the first connecting region 81 and the support member 90, and the projection of the third connecting region 83 along the first direction X is away from the projection of the second side wall 33.

[0131] In addition to the above differences, the parameters of the battery 100C are substantially the same as those of the battery 100A, and the description of the battery 100A can be referred to.

[0132] Referring to FIG. 11, an embodiment of the present application further provides a terminal device 200 including the battery (100A, 100B, 100C) of any of the above embodiments.

[0133] Optionally, the terminal device 200 can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like.

[0134] In summary, in the above battery (100A, 100B, 100C) and terminal device 200, one end of the pole 40 is electrically connected to the electrode assembly 30, and the other end of the pole 40 extends into the second accommodation space 32B, so as to reduce the space occupied by the pole 40 in the length direction of the battery cell 10. The protection plate 51 is arranged on the top wall 31, one end of the second adapter 53 extends into the second accommodation space 32B from the second opening 312 and is connected to the pole 40, and the other end of the second adapter 53 is connected to the protection plate 51, so as to reduce the size of the protection plate 51 and the pole 40 stacked on the top wall 31, which is beneficial to reduce the packaging length of the battery (100A, 100B, 100C), and further improve the energy density of the battery (100A, 100B, 100C).

[0135] In addition, those skilled in the art will recognize that modifications can be made to the specifically disclosed embodiments without departing from the scope of the inventive subject matter set forth in the claims.

Claims

1. A battery, characterized by, The battery comprises: The battery comprises: The electrode assembly comprises a tab group, a first tab and a second tab, the polarity of the first tab is opposite to that of the second tab, the tab group is provided with a first concave surface and a second concave surface, in the first direction, the projection of the first recess is located within the projection of the first concave surface, and the projection of the second recess is located within the projection of the second concave surface, the first tab extends from the first concave surface, the first tab is connected to the first recess, the second tab extends from the second concave surface, and the second tab is connected to the part of the pole column that extends into the shell.

2. The battery of claim 1, wherein, The shell further comprises a bottom wall, a third side wall and a fourth side wall, the top wall and the bottom wall are oppositely arranged along a second direction, the first side wall, the third side wall, the second side wall and the fourth side wall are connected end to end and between the top wall and the bottom wall, and the third side wall and the fourth side wall are oppositely arranged along a third direction, the first direction, the second direction and the third direction are perpendicular to each other; 3. The battery of claim 1 or 2, wherein the electrolyte is a mixture of the first and second electrolytes. The third side wall is provided with a third opening communicating with the first accommodating space, and the fourth side wall is provided with a fourth opening communicating with the second accommodating space. The first recess comprises a first wall, a second wall and a third wall, the first wall and the second side wall are oppositely arranged along the first direction, the second wall and the third wall are connected between the first wall and the first side wall, and in the first direction, the second wall is connected to the top wall and extends towards the bottom wall, and the third wall is connected to the third side wall and extends towards the fourth side wall.

4. The battery of claim 3, wherein the cathode is a lithium cobalt oxide cathode. ​ The second recess comprises a fourth wall, a fifth wall and a sixth wall, the fourth wall and the second side wall are oppositely arranged along the first direction, the fifth wall and the sixth wall are connected between the fourth wall and the main body The fifth wall connects the top wall and extends towards the bottom wall, and the sixth wall connects the fourth side wall and extends towards the third side wall.

5. The battery of claim 4, wherein the cathode is a lithium cobalt oxide cathode. The thickness direction of the protection plate is perpendicular to the first direction, and the protection plate and the top wall are oppositely arranged along the second direction; The first adapter comprises a first component, a second component and a first connecting part, the first component is oppositely arranged with the first wall along the first direction and is electrically connected with the first wall, the second component is oppositely arranged with the protection plate along the second direction and is electrically connected with the protection plate, and the first connecting part is connected between the first component and the second component; The second adapter comprises a third component, a fourth component and a second connecting part, the third component is oppositely arranged with the fourth wall along the first direction and is electrically connected with the pole, the fourth component is oppositely arranged with the protection plate along the second direction and is electrically connected with the protection plate, and the second connecting part is connected between the third component and the fourth component.

6. The battery of claim 5, wherein the cathode is a lithium cobalt oxide cathode. The third component comprises a first edge and a second edge along the first direction, the first edge is oppositely arranged with the fifth wall, and the second edge is oppositely arranged with the sixth wall; The distance between the first edge and the fifth wall is 0.5mm to 3mm, and the distance between the second edge and the sixth wall is 0.5mm to 3mm.

7. The battery of claim 6, wherein the cathode comprises a lithium metal oxide. The battery further comprises an injection molding part, which fills the gap between the third component and the fourth wall, the gap between the first edge and the fifth wall, and the gap between the second edge and the sixth wall.

8. The battery of claim 7, wherein the cathode is a lithium cobalt oxide cathode. The circuit board assembly comprises a substrate and a flexible circuit board connected to the substrate; The substrate is oppositely arranged with the top wall along the second direction, and the first adapter and the second adapter are connected to the substrate; The flexible circuit board comprises a first part, a second part, a third part and a first bending part, the first part comprises a first segment and a second segment, the first segment is connected to the side of the substrate away from the top wall, and the projection of the second segment is separated from the projection of the substrate along the second direction, the second part is located on the side of the first part away from the substrate, the first bending part is connected between the second segment and the second part, and the third part extends from the side of the second part away from the substrate; The injection molding part also covers the substrate and the first segment, and the second part, the third part, the first bending part and at least part of the second segment are exposed to the injection molding part.

9. The battery of claim 8, wherein the cathode is a lithium cobalt oxide cathode. The injection molding part comprises a first surface, a second surface and a third surface, the first surface and the second surface are arranged along the third direction as viewed along the second direction, the distance between the second surface and the top wall is smaller than the distance between the first surface and the top wall along the second direction, the third surface is connected between the first surface and the second surface, and the second section extends from the third surface.

10. The battery of claim 5, wherein the cathode comprises a lithium cobalt oxide. The thickness direction of the protection plate is the first direction; The first adapter comprises a fifth component, a sixth component and a third connecting portion, the fifth component is arranged opposite to the first wall along the first direction and is electrically connected to the first wall, the sixth component is arranged opposite to the protection plate along the first direction and is electrically connected to the protection plate, and the third connecting portion is connected between the fifth component and the sixth component; The second adapter comprises a seventh component, an eighth component and a fourth connecting portion, the seventh component is arranged opposite to the fourth wall along the first direction and is electrically connected to the pole, the eighth component is arranged opposite to the protection plate along the first direction and is electrically connected to the protection plate, and the fourth connecting portion is connected between the seventh component and the eighth component.

11. The battery of claim 10, wherein the cathode comprises a lithium metal oxide. As viewed along the first direction, the seventh component comprises a third edge and a fourth edge, the third edge is arranged opposite to the fifth wall, and the fourth edge is arranged opposite to the sixth wall; The distance between the third edge and the fifth wall is 0.5mm to 3mm, and the distance between the fourth edge and the sixth wall is 0.5mm to 3mm.

12. The battery of claim 10 or 11, wherein the electrolyte comprises a lithium salt. The battery further comprises a support connected to the shell and protruding out of the top wall along the second direction, the support is arranged opposite to at least part of the protection plate along the first direction, and the protection plate is connected to the support.

13. The battery of claim 12, wherein the cathode comprises a lithium metal oxide. The protection plate comprises a substrate and a flexible circuit board connected to the substrate; The substrate is located on one side of the support along the first direction, the substrate comprises a first area and a second area, the first area is connected to the support, and the projection of the second area is separated from the projection of the support along the first direction; The flexible circuit board comprises a fourth portion, the fourth portion is located on the side of the substrate facing the support, the projection of the fourth portion overlaps with the projection of the second area and is separated from the projection of the support along the first direction.

14. The battery of any one of claims 10 to 13, wherein the electrolyte comprises a lithium salt. The battery further comprises a protective glue, the protective glue fills the first accommodation space and covers the fifth component, and / or the protective glue fills the second accommodation space and covers the seventh component.

15. The battery of any one of claims 1 to 14, wherein, The battery further comprises a first insulating component, at least part of the first insulating component is located between the second adapter and the shell.

16. The battery of claim 15, wherein the cathode comprises a lithium metal oxide. The first insulating component is formed by curing of insulating glue coated on the shell; The first insulation member comprises a first insulation part, a second insulation part and a third insulation part, the first insulation part is arranged at the second recess and located at the circumferential side of the pole, the second insulation part is arranged between the protection plate and the top wall, and the third insulation part is arranged between the second adapter and the top wall.

17. The battery of any one of claims 1 to 16, wherein, The battery further comprises a second insulation member, the second insulation member extends from the side of the protection plate away from the top wall to the first side wall and the second side wall, and the second insulation member also covers the second accommodating space.

18. The battery of claim 17, wherein the cathode comprises a lithium metal oxide. The protection plate comprises a flexible circuit board, and the second insulation member is provided with a communication port, and the flexible circuit board extends out of the communication port.

19. A terminal device, characterized by The battery comprises the battery as claimed in any one of claims 1 to 18.

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