Current collector, top cover assembly, battery and electric equipment

Abstract

The utility model provides a current collector, a top cover assembly, a battery and electric equipment, the current collector comprises a current collector body and a reinforcing part, the current collector body comprises a pole section, a tab section and a holding section, the pole section is used for being electrically connected with a pole, the tab section comprises a tab section main body and a tab connecting structure, the tab section main body is connected with the pole section, and the tab connecting structure is connected with the pole section. The tab connecting structure is connected to the tab section main body in a bendable manner and is used for being electrically connected with a tab of a core package, and the holding section is convexly connected to one side, deviating from the core package, of the tab section main body so as to be clamped and fixed by an external instrument; the reinforcing part is at least partially arranged on the surface of one side of the fixing section in the thickness direction. By arranging the reinforcing part, the strength of the holding structure is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a current collector, a top cover assembly, a battery and electrical equipment. Background Art

[0002] A battery is a device that converts chemical energy into electrical energy, and usually includes a core pack, a pole, and a current collector. The pole lugs of the core pack are electrically connected to the pole through the current collector, so that the battery can supply power to external electrical equipment through the pole.

[0003] In the related art, the current collector has a welding portion welded to the pole lug, and the welding portion needs to be folded flat onto the main structure of the current collector to avoid the welding portion and the pole lug from wasting too much space inside the battery, thereby completing the electrical connection between the pole lug and the current collector. During the folding process of the welding portion, the operator can use a clamping tool to fix and clamp the holding structure provided on the main structure so that the force of the current collector when the welding portion is folded can be transmitted to the clamping tool, thereby avoiding damage to the core package caused by the force. However, due to the insufficient strength of the holding structure, during the production and assembly of the battery, the holding structure is easily deformed when the welding portion is folded flat, resulting in a lack of effective fixation of the main structure, which is likely to result in poor precision of the welding portion and the pole lug after assembly, and the core package is easily damaged, thereby affecting the performance of the battery.

[0004] Therefore, the prior art needs to be improved and enhanced. Utility Model Content

[0005] The embodiments of the utility model provide a current collecting member, a top cover assembly, a battery and an electrical device, which can improve the technical problem of low structural strength of a retaining portion.

[0006] In a first aspect, an embodiment of the present utility model provides a current collecting member, comprising:

[0007] A current collector body, the current collector body comprising a pole section, a tab section and a retaining section, the pole section being used to be electrically connected to the pole, the tab section comprising a tab section body and a tab connection structure, the tab section body being connected to the pole section, the tab connection structure being bendably connected to the tab section body and being used to be electrically connected to the tab of the core package, the retaining section being protrudingly connected to a side of the tab section body away from the core package for clamping and fixing by an external instrument; and

[0008] A reinforcing portion, wherein the reinforcing portion is at least partially disposed on a side surface of the holding section in a thickness direction.

[0009] In some embodiments, the reinforcing portion is connected to the holding section by bending so as to be attached to at least one side surface of the holding section in the thickness direction.

[0010] In some embodiments, the reinforcing portion includes a connected connecting side and a second free side, the connecting side is connected to a side edge of the retaining section along the width direction of the current collecting component body, the second free side is adjacent to a side edge of the retaining section away from the pole lug section, and the second free side is provided with a space avoidance structure, and the space avoidance structure is retracted to a side edge of the retaining section away from the pole lug section.

[0011] In some embodiments, the current collecting member body includes a first side edge and a second side edge that are oppositely disposed along a width direction;

[0012] The reinforcing portion includes a first reinforcing portion and a second reinforcing portion which are arranged opposite to each other along the width direction of the current collecting body, the first reinforcing portion is connected to the first side edge, the second reinforcing portion is connected to the second side edge, and the first reinforcing portion and the second reinforcing portion are arranged at intervals along the width direction of the current collecting body.

[0013] In some embodiments, the gap between the first reinforcement portion and the second reinforcement portion is greater than or equal to 0.2 mm.

[0014] In some embodiments, the number of the tab connection structure is at least one, at least one of the first side and the second side is connected to the tab connection structure, and the width ratio of the tab connection structure to the first reinforcement portion or the second reinforcement portion connected to the same side of the current collector body is 0.8-1.2.

[0015] In some embodiments, the current collecting member body includes a first side edge and a second side edge that are oppositely disposed along a width direction;

[0016] One side of the reinforcing portion along the width direction of the current collecting body is bent and connected to one of the first side and the second side, and the other side of the reinforcing portion along the width direction of the current collecting body is adjacent to the other of the first side and the second side.

[0017] In some embodiments, one end of the retaining section facing away from the pole lug section is disposed adjacent to one end of the reinforcing portion, and a gap is provided at at least one corner of the second end portion.

[0018] In some embodiments, one end of the retaining section facing away from the pole lug section is disposed adjacent to one end of the reinforcing portion to form a second end portion of the current collecting member;

[0019] Wherein, a second air avoidance structure is provided at the connection between one end of the retaining section away from the pole lug section and the reinforcing portion, so as to form a notch at the corner of the second end portion.

[0020] In some embodiments, a connection between the current collecting member body and the reinforcement portion is a curved surface structure.

[0021] In some embodiments, the reinforcement portion and the tab connection structure are spaced apart.

[0022] In a second aspect, an embodiment of the utility model further provides a top cover assembly, comprising:

[0023] Cover body;

[0024] A current collecting member as in any one of the above items, wherein the current collecting member is mounted on the cover; and

[0025] A pole is mounted on the cover and is electrically connected to the pole segment.

[0026] In a third aspect, an embodiment of the present utility model provides a battery, comprising:

[0027] A housing, wherein the housing is provided with a mounting cavity;

[0028] A core package, the core package is arranged in the installation cavity, and the core package is provided with the pole ear;

[0029] As in the top cover assembly described above, the cover body is connected to the shell to close the installation cavity, and the pole tab segment is electrically connected to the pole tab.

[0030] In a fourth aspect, an embodiment of the utility model provides an electrical device, comprising the battery as described above.

[0031] Beneficial effects of the embodiments of the utility model:

[0032] In the embodiment of the utility model, in the process of electrically connecting the pole lug segment to the pole lug, the holding segment can be clamped by an external device. At this time, since the position of the pole lug segment can be effectively controlled, the connection quality of the electrical connection between the pole lug segment and the pole lug can be higher. Furthermore, by at least partially providing the reinforcing portion on one side surface of the holding segment, the strength of the holding segment can be improved. Therefore, the embodiment of the utility model can improve the technical problem of low structural strength of the holding segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic structural diagram of the cooperation between the current collecting member, the pole lug and the pole provided in the embodiment of the utility model.

[0035] Figure 2 for Figure 1 Schematic diagram of the current collector and the tab after bending.

[0036] Figure 3 for Figure 1 Schematic diagram of the structure of the current collecting component shown.

[0037] Figure 4 for Figure 1 The schematic diagram of the current collecting piece forming multiple arc-shaped welding tracks is shown.

[0038] Figure 5 for Figure 1 The schematic diagram of the current collecting piece forming a circular ring-shaped welding track is shown.

[0039] Figure 6 for Figure 1 A schematic structural diagram of a current collecting member in which a reinforcement portion is arranged on the inner side of the current collecting member body.

[0040] Figure 7 for Figure 1 A second structural schematic diagram of the pole lug segment in the current collector is shown.

[0041] Figure 8 for Figure 3 A partial enlarged view of the X in the figure.

[0042] Fig. 9 A schematic structural diagram of a top cover assembly provided in an embodiment of the utility model.

[0043] Fig.10 for Fig. 9 Schematic diagram of the dimensional parameters of the top cover assembly shown.

[0044] Fig.11 A schematic structural diagram of a battery provided in an embodiment of the utility model.

[0045] Fig.12 for Fig.11 The cross-sectional view of the battery along the PP direction is shown.

[0046] Fig.13 for Fig.12 Schematic diagram of the size parameters of the current collecting component shown. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0048] In addition, the "plurality" in the embodiments of the present application refers to two or more than two. In view of this, in the embodiments of the present application, "plurality" can also be understood as "at least two". "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and there is no limit on which ones are included. For example, including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A, B and C can be included.

[0049] It should be noted that, in the embodiments of the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0050] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the current collector, the pole lug and the pole provided in the embodiment of the utility model. Figure 2 for Figure 1 The current collector and the tab are shown as schematic diagrams after being bent. The embodiment of the present application provides a current collector 100. The current collector 100 may include a current collector body 11 and a reinforcement portion 12.

[0051] The current collector body 11 includes a pole segment 111, a pole lug segment 112 and a retaining segment 115. The pole segment 111 is used to be electrically connected to the pole 200. The pole lug segment 112 includes a pole lug segment body 1122 and a pole lug connection structure 1121. The pole lug segment body 1122 is connected to the pole segment 111. The pole lug connection structure 1121 is bendably connected to the pole lug segment body 1122 and is used to be electrically connected to the pole lug 51 of the core package. The retaining segment 115 protrudes and is connected to the side of the pole lug segment body 1122 away from the core package for clamping and fixing by external instruments.

[0052] Then, in the actual assembly process, you can first Figure 1 As shown, the tab connection structure 1121 is vertically connected to the tab segment body 1122, so that the tab connection structure 1121 can be erected and welded to the tab 51. After the tab connection structure 1121 is welded and fixed to the tab 51, Figure 2 As shown, the tab connection structure 1121 and the tab 51 are bent to fit the tab segment body 1122, so that the internal structure of the battery is more compact, thereby improving the energy density of the battery. In the process of bending the tab connection structure 1121 and the tab 51, the holding segment 115 can be clamped by an external device, so that the force of the current collector 100 when the tab connection structure 1121 and the tab 51 are bent is transmitted to the external device, thereby preventing the current collector 100 from crushing the core pack.

[0053] The reinforcing portion 12 is at least partially disposed on one side surface of the retaining section 115 in the thickness direction H1, thereby increasing the strength of the retaining section 115 to prevent the retaining section 115 from deforming during the bending of the tab connection structure 1121 and the tab 51, thereby preventing the current collector 100 from crushing the core package.

[0054] It can be understood that the reinforcing portion 12 is at least partially arranged on one side surface of the holding section 115 in the thickness direction H1. The reinforcing portion 12 may be arranged only on one side surface of the holding section 115 in the thickness direction H1. The reinforcing portion 12 may also be arranged on both side surfaces of the holding section 115 in the thickness direction H1. The embodiment of the present application does not limit this.

[0055] Furthermore, when the reinforcing portion 12 is only provided on one side surface of the holding section 115 in the thickness direction, the reinforcing portion 12 may be provided on the inner side surface of the holding section 115 (i.e., the side surface of the holding section 115 facing the core package), or may be provided on the outer side surface of the holding section 115 (i.e., the side surface of the holding section 115 facing away from the core package), and the embodiment of the present application does not limit this.

[0056] The above is an overall description of the current collector 100 according to the embodiment of the present application. The following is an example of the connection structure between the pole segment 111 and the pole 200 and the reinforcement part 12 .

[0057] Please continue to refer to Figure 3 , Figure 3 for Figure 1 The pole segment 111 is provided with a pole connection structure 1111 for electrically connecting to the pole 200 , so that the pole segment 111 and the pole 200 can be electrically connected.

[0058] For example, the pole connection structure 1111 may include a pole installation hole, and the pole installation hole is used to install the pole 200 to be electrically connected to the pole 200. Furthermore, during the assembly process, the pole 200 can be installed by passing through the pole installation hole.

[0059] In some embodiments, the pole segment 111 may further include a positioning hole 1112. The positioning hole 1112 is located between the pole connection structure 1111 and the pole ear segment 112. Accordingly, other structures inside the battery (such as a cover body to be explained later) may be provided with a positioning column, which is plugged into the positioning hole 1112, so that the cooperation between the positioning hole 1112 and the positioning column can limit the rotation or movement of the current collector body 11 relative to the battery cover 300.

[0060] It can also be understood that the pole mounting hole can be a through hole or a blind hole, and this embodiment of the present application does not limit this.

[0061] In some embodiments, the pole connection structure 1111 can also be used for welding with the pole 200, such as friction welding, laser welding, and ultrasonic welding. The embodiments of the present application do not limit this. As long as the structure is used to achieve the connection between the mounting portion of the pole 200 and the pole 200, it is within the protection scope of the pole connection structure 1111 of the present application.

[0062] For example, please refer to Figure 4 and Figure 5 , Figure 4 for Figure 1 The schematic diagram of the current collector forming multiple arc-shaped welding tracks is shown in FIG. Figure 5 for Figure 1 The current collector is shown as a schematic diagram of a circular ring-shaped welding track. The pole 200 can adopt a melting welding process at the pole mounting hole to form a closed circular welding track, and also begin to form a plurality of arc-shaped welding tracks.

[0063] Next, the technical solution of the embodiment of the present application will be described with examples in combination with the pole lug segment 112 .

[0064] Please continue to refer to Figure 3 , the pole lug segment 112 may be connected to the pole segment 111 in a bent manner. Of course, the pole lug segment 112 may also be connected to the pole segment 111 in a straight manner, that is, the pole lug segment 112 may also be located in the same plane as the pole segment 111, which is not limited in the present embodiment.

[0065] In some embodiments, each tab connection structure 1121 is provided with a weld mark area for welding with the tab 51. Along the width direction H2 of the current collector body 11, the difference between the width of at least one tab segment 112 and the width of its weld mark area is greater than or equal to 2 mm. Furthermore, in the process of welding the tab connection structure 1121 with the tab 51, the external tooling equipment can fix the tab connection structure 1121 through the position where the tab segment 112 is not provided with the weld mark area, so as to improve the welding quality between the tab connection structure 1121 and the tab 51, thereby improving the reliability and service life of the battery.

[0066] For example, the difference between the width of each pole ear segment 112 and the width of its weld printing area can be 2 mm, 2.2 mm, 2.45 mm, 2.5 mm, 2.7 mm, 2.98 mm, 3 mm, 3.4 mm, 3.95 mm or 4 mm, which is not limited in the embodiments of the present application.

[0067] In some embodiments, the tab segment body 1122 and the tab connection structure 1121 may be integrally bent and formed.

[0068] In order to facilitate the bending of the tab connection structure 1121 during the production and assembly of the battery, a groove may be provided at the connection between the tab segment body 1122 and the tab connection structure 1121 .

[0069] It can also be understood that the connection between the tab segment body 1122 and the tab connection structure 1121 can be an arc transition, so as to avoid the formation of a straight edge at the bent connection between the tab segment body 1122 and the tab connection structure 1121, thereby causing damage to the interior of the battery (such as the insulating film and the tab 51).

[0070] Next, the technical solution of the embodiment of the present application will be described with examples in combination with the reinforcement part 12 .

[0071] In some embodiments, the reinforcing portion 12 is integrally bent and formed with the current collector body 11. Therefore, in the actual processing process, the current collector body 11 and the reinforcing portion 12 can be directly formed from the sheet metal raw material through a bending process. Therefore, during the forming process, it is not necessary to cut off the reinforcing portion 12 through a punching process, thereby simplifying the manufacturing process of the current collector 100 and improving the material utilization rate of the sheet metal raw material.

[0072] For example, the reinforcing portion 12 may be connected to the holding section 115 by bending, so as to be attached to at least one side surface of the holding section 115 in the thickness direction H1.

[0073] It can also be understood that the connection between the reinforcement part 12 and the current collector body 11 can be an arc surface, so as to avoid the bending connection between the reinforcement part 12 and the current collector body 11 forming a straight edge, thereby causing damage to the inside of the battery (such as the insulating film).

[0074] In some embodiments, at least one edge of the current collecting body 11 in the width direction is bent and connected to the reinforcing portion 12 , so that the reinforcing portion 12 is attached to at least one surface of the current collecting body 11 in the thickness direction.

[0075] Please continue to refer to Figure 6 , Figure 6 for Figure 1 A schematic diagram of the structure in which the reinforcement part of the current collector is arranged on the inner side of the current collector body. The current collector body 11 may include a first side 113 and a second side 114 arranged opposite to each other along the width direction H2. Then, the reinforcement part 12 may be connected only to the first side 113, the reinforcement part 12 may also be connected only to the second side 114, or the reinforcement part 12 may be partially connected to the first side 113 and partially connected to the second side 114, and the embodiment of the present application does not limit this.

[0076] For example, the reinforcing portion 12 may include a first reinforcing portion 12a and a second reinforcing portion 12b. The first reinforcing portion 12a is connected to the first side edge 113 by bending, and the second reinforcing portion 12b is connected to the second side edge 114 by bending.

[0077] The first reinforcement portion 12a and the second reinforcement portion 12b may be spaced apart in the width direction H2 of the current collector body 11. The first reinforcement portion 12a and the second reinforcement portion 12b may also be located on the same side surface of the current collector body 11 in the thickness direction.

[0078] Then, in the actual production process, both sides of the current collecting member body 11 in the width direction H2 can be bent inward by 180 degrees at the same time to form the first reinforcement portion 12a and the second reinforcement portion 12b respectively.

[0079] In some embodiments, the gap between the first reinforcement part 12a and the second reinforcement part 12b may be greater than or equal to 0.2 mm. Therefore, it can also be understood that a margin is reserved between the first reinforcement part 12a and the second reinforcement part 12b to prevent the second reinforcement part 12b from interfering with each other when the first reinforcement part 12a and the second reinforcement part 12b are formed by bending through a bending process, thereby improving the reliability and molding quality of the current collector body 11 after bending.

[0080] For example, the gap between the first reinforcement portion 12a and the second reinforcement portion 12b is C, and C can be 0.2 mm, 0.21 mm, 0.224 mm, 0.237 mm, 0.245 mm, 0.25 mm, 0.27 mm, 0.3 mm, 0.35 mm, 0.391 mm, 0.4 mm, 0.423 mm, 0.45 mm, 0.5 mm, 0.571 mm, 0.64 mm, 0.689 mm, 0.7 mm, 0.721 mm, 0.753 mm, 0.8 mm, 0.849 mm, 0.9 mm, 0.914 mm, 0.95 mm, 0.974 mm, 0.99 mm, 1 mm or 1.1 mm, etc., and the embodiments of the present application are not limited to this.

[0081] In some embodiments, the gap C between the first reinforcement part 12a and the second reinforcement part 12b can be 0.5 to 1 mm. Furthermore, on the one hand, by the gap reserved between the first reinforcement part 12a and the second reinforcement part 12b being greater than or equal to 0.5 mm, the first reinforcement part 12a and the second reinforcement part 12b can be prevented from interfering with each other due to the error of the actual bending process. On the other hand, by the gap reserved between the first reinforcement part 12a and the second reinforcement part 12b being less than or equal to 1 mm, the first reinforcement part 12a and the second reinforcement part 12b can be made as large as possible, thereby improving the overall strength of the current collector 100 and improving the current flow capacity.

[0082] In some embodiments, along the width direction of the current collecting body 11, the width of the current collecting body 11 can be W1, the width of the first reinforcement part 12a can be A, the gap between the first reinforcement part 12a and the second reinforcement part 12b can be C, and the width of the second reinforcement part 12b can be B, then B=WAC.

[0083] Please continue to refer to Figure 7 , Figure 7 for Figure 1 A schematic diagram of a second structure of a lug segment in a current collector is shown. In some embodiments, the number of the lug connection structure 1121 is at least one. At least one of the first side 113 and the second side 114 is connected to a lug connection structure 1121 .

[0084] Correspondingly, the width ratio of the tab connection structure 1121 to the first reinforcement portion 12a or the second reinforcement portion 12b connected to the same side of the current collector body 11 is 0.8-1.2, such as 0.8, 0.845, 0.9, 0.941, 0.954, 1, 1.054, 1.1, 1.16 or 1.2, which is not limited in the embodiments of the present application. Thus, by making the tab connection structure 1121 and the first reinforcement portion 12a or the second reinforcement portion 12b connected to the same side of the current collector body 11 substantially the same width, the material utilization rate of the sheet metal raw material used for bending and forming the current collector 100 can be improved.

[0085] For example, the tab connection structure 1121 may include a first tab connection structure 1121a and a second tab connection structure 1121b that are arranged opposite to each other along the width direction of the current collector body 11. The first tab connection structure 1121a and the first reinforcement 12a are connected to the first side 113, and the first tab connection structure 1121a and the first reinforcement 12a have the same width. The second tab connection structure 1121b and the second reinforcement 12b are connected to the second side 114, and the second tab connection structure 1121b and the second reinforcement 12b have the same width.

[0086] Of course, the tab connection structure 1121 may also include only one of the first tab connection structure 1121a and the second tab connection structure 1121b described above, which is not limited in the embodiment of the present application.

[0087] Optionally, the reinforcing portion 12 is connected to a bend of one of the first side edge 113 and the second side edge 114 on one side along the width direction H2 of the current collecting body 11 , and the reinforcing portion 12 is arranged adjacent to the other of the first side edge 113 and the second side edge 114 on the other side along the width direction H2 of the current collecting body 11 .

[0088] Therefore, in the actual bending process, the reinforcing portion 12 is bent from only one side of the current collecting body 11 to cover all parts in the width direction H2 of the current collecting body 11 .

[0089] In some embodiments, along the width direction H2 of the current collecting body 11 , the width of the reinforcing portion 12 is smaller than the width of the current collecting body 11 .

[0090] In some embodiments, along the width direction H2 of the current collector body 11, the width of the tab connection structure 1121 may be the same as the width of the reinforcement portion 12. Thus, the material utilization rate of the sheet metal used for bending and forming the current collector 100 may be improved.

[0091] Please continue to refer to Figure 8 , Figure 8 for Figure 3A partial enlarged view at X in the figure. In some embodiments, the reinforcing portion 12 includes a connected connecting side 124 and a second free side 125. The connecting side 124 is connected to a side edge of the current collector body 11 in the width direction H2. The second free side 125 is arranged adjacent to a side edge of the retaining section 115 that is away from the pole lug section 112. And a first air avoidance structure 126 is provided at one end of the second free side 125 away from the connecting side 124, and the first air avoidance structure 126 is retracted to a side edge of the retaining section 115 that is away from the pole lug section 112. Furthermore, the end of the second free side 125 away from the connecting side 124 can be restricted from protruding outwardly from the outer side of the current collector body 11 along the length direction.

[0092] Furthermore, after the reinforcing portion 12 is bent to the side in the thickness direction H1 attached to the holding section 115, even if the reinforcing portion 12 is tilted at a certain angle toward the outside of the current collector body 11 along the length direction due to processing errors, the first air-avoiding structure 126 can prevent the end of the second free side 125 away from the connecting side 124 from protruding outward from the outside of the current collector body 11 along the length direction to form a sharp protrusion. Then, in the subsequent battery assembly process, it can be prevented that the end of the second free side 125 away from the connecting side 124 forms a sharp protrusion and pierces other structures inside the battery (such as piercing the insulating film), ultimately improving the reliability and service life of the battery.

[0093] The first avoidance structure 126 may be a avoidance groove, a chamfer, or a notch, etc., which is not limited in the embodiment of the present application.

[0094] In some embodiments, one end of the retaining section 115 away from the tab section 112 is disposed adjacent to the reinforcing portion 12 to form a second end portion of the current collector 100. A clearance gap 127 is disposed at at least one corner of the second end portion.

[0095] For example, after the reinforcing portion 12 is bent to the side attached to the current collector body 11 in the thickness direction, the retaining section 115 and the reinforcing portion 12 are punched out together to form a gap 127 through a punching process, so as to avoid forming a sharp angle at the connection between the end of the retaining section 115 away from the pole lug section 112 and the end of the reinforcing portion 12 away from the pole lug section 112. Then, in the subsequent battery assembly process, it can be avoided that the second free side 125 is close to the connecting side 124 to form a sharp protrusion and pierce other structures inside the battery (such as piercing the insulating film), and finally improve the reliability and service life of the battery.

[0096] In some embodiments, the reinforcement portion 12 and the tab connection structure 1121 are spaced apart.

[0097] Then, on the one hand, in the actual production process of the battery, the reinforcing portion 12 attached to the holding section 115 and the tab connection structure 1121 perpendicular to the tab section 112 may be first bent. At this time, since the reinforcing portion 12 and the tab connection structure 1121 are arranged at intervals, the reinforcing portion 12 and the tab connection structure 1121 can be bent into different angles more conveniently and accurately. On the other hand, when the tab connection structure 1121 needs to be folded to the tab section 112 after being welded to the tab 51, even if the position accuracy of the tab section 112 is bent with a certain deviation, so that the tab section 112 is tilted toward the reinforcing portion 12, the reinforcing portion 12 and the tab connection structure 1121 are less likely to interfere with each other.

[0098] For example, when the reinforcing portion 12 includes a first reinforcing portion 12a and a second reinforcing portion 12b disposed opposite to each other along the width direction H2 of the current collecting member body 11 , the first reinforcing portion 12a is connected to the first side edge 113 , and the second reinforcing portion 12b is connected to the second side edge 114 .

[0099] Then, the first reinforcement portion 12a and the tab connection structure 1121 may be both formed by bending from the first side edge 113. Also, the first reinforcement portion 12a and the tab connection structure 1121 are spaced apart along the length direction of the current collector body 11.

[0100] In some embodiments, the reinforcing portion 12 extends at least from one end of the holding segment 115 away from the pole lug segment 112 to the bending connection between the holding segment 115 and the pole lug segment 112. Thus, the reinforcing portion 12 can provide reinforcement effects to more positions of the holding segment 115, and can also improve the material utilization rate of the sheet metal raw material. Among them, the bending connection between the holding segment 115 and the pole lug segment 112 can be understood as the dividing line between the holding segment 115 and the pole lug segment 112.

[0101] The above are some examples of the current collecting member 100 according to the embodiment of the present application.

[0102] Please continue to refer to Fig. 9 , Fig. 9 A schematic diagram of the structure of a top cover assembly provided for an embodiment of the utility model. The embodiment of the present application also provides a top cover assembly. The top cover assembly may include a cover body 300, a current collector 100 and a pole 200. The current collector 100 is the current collector 100 as described above. The current collector 100 is mounted on the cover body 300. The pole 200 is mounted on the cover body 300 and is electrically connected to the pole segment 111.

[0103] Please continue to refer to Fig.10 , Fig.10 for Fig. 9Schematic diagram of the size parameters of the top cover assembly shown. In some embodiments, along the length direction of the pole segment 111, the distance between the center of the area of ​​the pole segment 111 for mounting the pole 200 and the pole lug segment 112 is L2 (of course, it can also be understood that the distance between the center of the pole 200 or the pole connection structure 1111 and the pole lug segment 112 is L2). The length of the cover body 300 is L1. L2≤(L1) / 3.

[0104] Thus, the distance between the pole connection structure 1111 and the pole lug segment 112 is reduced, thereby reducing the resistance of the portion of the current collector 100 between the pole connection structure 1111 and the pole lug segment 112 , thereby ultimately improving the current carrying capacity of the current collector 100 .

[0105] For example, L2 may be equal to (L1) / 3, (L1) / 4, (L1) / 5, (L1) / 6, (L1) / 7 or (L1) / 8, which is not limited in the embodiments of the present application.

[0106] In some embodiments, 5 mm ≤ L2. For example, L2 may be 5 mm, 5.7 mm, 6 mm, 6.5 mm, 6.95 mm, 7 mm, 8 mm, 9.5 mm or 10 mm, etc., which is not limited in the present embodiment. Thus, it is ensured that there is enough clearance between the pole connection structure 1111 and the end of the cover 300 to set the parts for positioning and fastening, so as to realize the installation and fixation of the pole segment 111.

[0107] For example, the pole segment 111 may be provided with the above-mentioned positioning hole 1112. The positioning hole 1112 is located between the pole connection structure 1111 and the pole lug segment 112. Accordingly, the cover 300 may be provided with a positioning post, which is plugged into the positioning hole 1112, so as to achieve the connection and fixation between the cover 300 and the current collector 100.

[0108] The above are some examples of the top cover assembly of the embodiment of the present application.

[0109] An embodiment of the present application also provides a battery, which may include the top cover assembly as described above.

[0110] For example, please continue to refer to Fig.11 and Fig.12 , Fig.11 A schematic diagram of the structure of a battery provided in an embodiment of the utility model, Fig.12 for Fig.11The battery is shown in a cross-sectional view along the PP direction. The battery may include a shell 400, a core pack 500 and a top cover assembly. The shell 400 is provided with an installation cavity, and the core pack 500 is arranged in the installation cavity. The core pack 500 is provided with a pole ear 51. The cover body 300 of the top cover assembly is connected to the shell 400 to close the installation cavity. The pole ear section 112 of the current collector 100 of the top cover assembly is electrically connected to the pole ear 51 of the core pack 500. Thereby, the top cover assembly can supply power to an external device through the pole 200.

[0111] In some embodiments, the battery may further include an insulating film 600 , which wraps the pole lug segment 112 and the core package 500 to insulate the shell 400 from the pole lug segment 112 and the core package 500 , respectively, thereby reducing the risk of internal short circuit in the battery.

[0112] In some embodiments, along the width direction of the current collector body 11, the ratio of the width of the current collector body 11 to the width of the shell 400 is less than or equal to 0.9. Alternatively, it can be said that along the width direction of the current collector body 11, the width of the current collector body 11 is W, and the width of the battery is W0. Among them, W / (W0)≤0.9. Thus, it can be ensured that there is enough gap between the current collector 100 and the inner wall of the shell 400 to avoid the current collector 100 from damaging the inner wall of the shell 400 or the insulating film 600, thereby improving the reliability and service life of the battery.

[0113] For example, along the width direction of the current collecting body 11, the ratio of the width of the current collecting body 11 to the width of the shell 400 can be 0.9, 0.87, 0.812, 0.8, 0.75, 0.742, 0.7, 0.69, 0.655, 0.6 or 0.5, etc., which is not limited to this embodiment of the present application.

[0114] In some embodiments, along the height direction of the battery (or the length direction of the tab segment 112 ), the tab connection structure 1121 may be located in the middle of the core package 500 .

[0115] For example, please continue to refer to Fig.13 , Fig.13 for Fig.12 Schematic diagram of the dimension parameters of the current collector shown. Along the height direction of the battery (or the length direction of the pole lug segment 112), the total height of the pole lug connection structure 1121 is h1, the distance between the pole lug connection structure 1121 and the pole column segment 111 is h2, and the total height of the battery is H. Among them, h2≤(H-5) / 2-h1.

[0116] In some embodiments, along the height direction of the battery (or the length direction of the tab segment 112 ), the center line of the tab connection structure 1121 may coincide with the center line of the tab 51 .

[0117] For example, along the height direction of the battery (or the length direction of the pole lug segment 112 ), the total height of the pole lug connection structure 1121 is h1, and the distance between the pole lug connection structure 1121 and the pole column segment 111 is h2, where h2+h1 / 2 is the centerline position of the pole lug 51 .

[0118] The above are some examples of batteries according to the embodiments of the present application.

[0119] An embodiment of the present application also provides an electrical device, which may include the battery as described above.

[0120] Electrical equipment may be, but is not limited to, transportation, smart wearable devices, mobile terminals, household appliances and medical devices, which are not limited in the embodiments of the present application. Transportation includes, but is not limited to, cars, buses, trains, ships, flight equipment, etc. Smart wearable devices include, but are not limited to, smart watches, smart bracelets, cervical massagers, etc. Mobile terminals include, but are not limited to, smart phones, laptops, tablet computers, POS (point of sales terminal). Household appliances include, but are not limited to, televisions, washing machines, air conditioners, rice cookers, smart sweepers, smart lights, etc. Medical devices include, but are not limited to, infrared electronic thermometers, pulse oximeters, human body composition analyzers, etc.

[0121] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A current collecting member, characterized in that: include: A current collector body, the current collector body comprising a pole section, a tab section and a retaining section, the pole section being used to be electrically connected to the pole, the tab section comprising a tab section body and a tab connection structure, the tab section body being connected to the pole section, the tab connection structure being bendably connected to the tab section body and being used to be electrically connected to the tab of the core package, the retaining section being protrudingly connected to a side of the tab section body away from the core package for clamping and fixing by an external instrument; and A reinforcing portion, wherein the reinforcing portion is at least partially disposed on a side surface of the holding section in a thickness direction.

2. The current collecting member according to claim 1, characterized in that: The reinforcing portion is connected to the holding section by bending so as to be attached to at least one side surface of the holding section in the thickness direction.

3. The current collecting member according to claim 2, characterized in that: The reinforcing portion includes a connected connecting side and a second free side, the connecting side is connected to a side edge of the retaining section along the width direction of the current collector body, the second free side is adjacent to a side edge of the retaining section away from the pole lug section, and the second free side is provided with a space avoidance structure, and the space avoidance structure is retracted to a side edge of the retaining section away from the pole lug section.

4. The current collecting member according to claim 2, characterized in that: The current collecting member body comprises a first side edge and a second side edge which are arranged opposite to each other along the width direction; The reinforcing portion includes a first reinforcing portion and a second reinforcing portion which are arranged opposite to each other along the width direction of the current collecting body, the first reinforcing portion is connected to the first side edge, the second reinforcing portion is connected to the second side edge, and the first reinforcing portion and the second reinforcing portion are arranged at intervals along the width direction of the current collecting body.

5. The current collecting member according to claim 4, characterized in that: A gap between the first reinforcement portion and the second reinforcement portion is greater than or equal to 0.2 mm.

6. The current collecting member according to claim 4, characterized in that: There is at least one tab connection structure, at least one of the first side and the second side is connected to the tab connection structure, and the width ratio of the tab connection structure to the first reinforcement part or the second reinforcement part connected to the same side of the current collector body is 0.8-1.

2.

7. The current collecting member according to claim 2, characterized in that: The current collecting member body comprises a first side edge and a second side edge which are arranged opposite to each other along the width direction; One side of the reinforcing portion along the width direction of the current collecting body is bent and connected to one of the first side and the second side, and the other side of the reinforcing portion along the width direction of the current collecting body is adjacent to the other of the first side and the second side.

8. The current collecting member according to claim 2, characterized in that: One end of the retaining section facing away from the pole lug section is arranged adjacent to one end of the reinforcing portion to form a second end portion of the current collecting member, and a gap is provided at at least one corner of the second end portion.

9. The current collecting member according to claim 2, characterized in that: The connection between the current collecting member body and the reinforcement portion is a curved surface structure.

10. The current collecting member according to any one of claims 1 to 9, characterized in that: The reinforcement portion and the tab connection structure are arranged at intervals.

11. The current collecting member according to any one of claims 1 to 9, characterized in that: The reinforcement portion at least extends from one end of the holding section away from the pole lug section to a point where the holding section is bent and connected to the pole lug section.

12. A top cover assembly, characterized in that: include: Cover body; The current collecting member according to any one of claims 1 to 11, wherein the current collecting member is mounted on the cover; and A pole is mounted on the cover and is electrically connected to the pole segment.

13. A battery, characterized in that: include: A housing, wherein the housing is provided with a mounting cavity; A core package, the core package is arranged in the installation cavity, and the core package is provided with the pole ear; The top cover assembly as described in claim 12, wherein the cover body is connected to the shell to close the installation cavity, and the pole tab segment is electrically connected to the pole tab.

14. An electrical device, characterized in that: Comprising the battery of claim 13.

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