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 tab section and a pole section which are connected in a bending manner, the tab section is used for being electrically connected with a tab of a core package, and the pole section is provided with a pole connecting structure used for being electrically connected with a pole; at least part of the reinforcing part is arranged on the surface of one side of the pole section in the thickness direction, and at least part of the reinforcing part extends from the pole connection structure to the bending connection part of the pole section and the tab section. In the application, the reinforcing part can play a very good role in reinforcing the pole section of the current collecting piece, so that the overall strength of the current collecting piece is improved, the reliability of the battery is improved, and the service life of the battery is prolonged.

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 strength of the current collector is relatively low, so it is easy to deform or even break during use, thereby causing battery failure.

[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 strength of the current collecting member.

[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 bent and connected pole lug section and a pole column section, the pole lug section being used to be electrically connected to the pole lug of the core package, and the pole column section being provided with a pole column connection structure for being electrically connected to the pole column; and,

[0008] A reinforcing portion, wherein the reinforcing portion is at least partially disposed on a side surface of the pole segment in the thickness direction, and at least partially extends from the pole connection structure to a bent connection portion between the pole segment and the pole lug segment.

[0009] In some embodiments, the reinforcement portion is made of a conductive material, and the reinforcement portion is electrically connected to the pole segment and / or the pole tab segment.

[0010] In some embodiments, the reinforcement portion is attached to the current collecting member body.

[0011] In some embodiments, the pole segment includes a pole mounting hole, the pole mounting hole is used to mount the pole, and the reinforcement portion is at least partially disposed around the pole mounting hole and is formed with a positioning step disposed around the pole mounting hole.

[0012] In some embodiments, at least one side edge of the current collecting member body in the width direction is bent and connected to the reinforcing portion, so that the reinforcing portion is at least attached to one side surface of the pole segment in the thickness direction.

[0013] 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;

[0014] The reinforcement portion includes a first reinforcement portion and a second reinforcement portion, the first reinforcement portion is connected to the first side edge by bending so as to be attached to the pole segment, and the second reinforcement portion is connected to the second side edge by bending so as to be attached to the pole segment.

[0015] In some embodiments, the first reinforcement portion and the second reinforcement portion are spaced apart along the width direction of the current collecting member body, and a gap between the first reinforcement portion and the second reinforcement portion is greater than or equal to 0.2 mm.

[0016] In some embodiments, the pole lug segment includes a pole lug segment body and a pole lug connection structure, the pole lug segment body is connected to the pole column segment, the pole lug connection structure is bendably connected to the pole lug segment body, and the pole lug connection structure is used to be welded and fixed to the pole lug;

[0017] Wherein, the number of the tab connection structure is at least one, and at least one of the first side and the second side is connected to the tab connection structure;

[0018] 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.

[0019] In some embodiments, the pole segment is further provided with a positioning hole, which is at least partially located between the first reinforcement portion and the second reinforcement portion.

[0020] 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;

[0021] The reinforcing portion is bent and connected to one of the first side and the second side on one side along the width direction of the current collecting body, and is disposed adjacent to the other of the first side and the second side on the other side along the width direction of the current collecting body.

[0022] In some embodiments, the reinforcing portion includes a connected connecting side and a first free side, the connecting side is connected to a side edge of the current collector body in the width direction, the first free side is adjacent to a side edge of the pole segment away from the pole lug segment, and the first free side is provided with a first air avoidance structure, and the air avoidance structure is retracted to a side edge of the pole segment away from the pole lug segment.

[0023] In some embodiments, one end of the pole segment facing away from the pole lug segment is disposed adjacent to one end of the reinforcement portion to form a first end portion of the current collector, and a gap is provided at at least one corner of the first end portion.

[0024] In some embodiments, the outer side of the connection between the current collecting member body and the reinforcement portion is a curved surface structure.

[0025] In a second aspect, an embodiment of the present utility model further provides a top cover assembly, comprising:

[0026] Cover body;

[0027] A current collecting member as in any one of the above items, wherein the current collecting member is mounted on the cover; and

[0028] A pole is mounted on the cover and is electrically connected to the pole segment.

[0029] In some embodiments, along the length direction of the pole segment, the distance between the center of the pole and the pole lug segment is L2, and the length of the cover is L1;

[0030] Among them, 5mm≤L2≤(L1) / 3.

[0031] In a third aspect, an embodiment of the utility model further provides a battery, comprising:

[0032] A housing, wherein the housing is provided with a mounting cavity;

[0033] A core package, the core package is arranged in the installation cavity, and the core package is provided with the pole ear; and

[0034] In the top cover assembly as described in any one of the above items, 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.

[0035] In a fourth aspect, an embodiment of the present invention further provides an electrical device, comprising the battery as described above.

[0036] Beneficial effects of the embodiments of the utility model:

[0037] In an embodiment of the utility model, by extending the reinforcing portion from the pole connection structure to the pole lug section, the portion of the pole section extending from the pole connection structure to the pole lug section can be reinforced, thereby improving the technical problem that the collector body has low strength and is prone to deformation or even breakage, thereby improving the reliability and service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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.

[0039] 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.

[0040] Figure 2 for Figure 1 Schematic diagram of the structure of the current collecting component shown.

[0041] Figure 3 Schematic diagram of forming multiple arc-shaped welding tracks for current collecting parts.

[0042] Figure 4 Schematic diagram of forming a circular ring-shaped welding track for the current collecting piece.

[0043] Figure 5 for Figure 1 A second structural schematic diagram of the reinforcement portion of the current collecting member is shown.

[0044] Figure 6 for Figure 1 A second structural schematic diagram of the lug segment of the current collector is shown.

[0045] Figure 7 for Figure 6 Schematic diagram of the tab connection structure of the current collector folded onto the tab segment body.

[0046] Figure 8 The figure is a structural schematic diagram of a current collector in which the reinforcement portion of the current collector is folded to the inner side of the current collector body.

[0047] Fig. 9 for Figure 5 Schematic diagram of the structure of the current collecting component shown.

[0048] Fig.10 for Fig. 9 A partial enlarged view of the X in the figure.

[0049] Fig.11 for Figure 1 A third structural schematic diagram of the current collecting member is shown.

[0050] Fig.12 A schematic structural diagram of a top cover assembly provided in an embodiment of the utility model.

[0051] Fig.13 for Fig.12 Schematic diagram of the dimensional parameters of the top cover assembly shown.

[0052] Fig.14 A schematic diagram of the structure of a battery provided in an embodiment of the utility model.

[0053] Fig.15 for Fig.14 The cross-sectional view of the battery along the PP direction is shown.

[0054] Fig.16 for Fig.15 Schematic diagram of the size parameters of the current collecting component shown. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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.

[0058] Please refer to Figure 1 , Figure 11 is a schematic diagram of the structure of the current collector provided by the embodiment of the utility model, in cooperation with the pole ear and pole column. The embodiment of the present application provides a current collector 100. The current collector 100 is applied to a battery. The battery can be applied to electrical equipment, and the electrical equipment can include game controllers, household appliances, medical equipment, and transportation vehicles powered by batteries, etc., which are not limited in the embodiment of the present application.

[0059] The current collector 100 may include a current collector body 11 and a reinforcement portion 12. The current collector body 11 includes a pole segment 111 and a pole lug segment 112 that are connected by bending. The pole segment 111 is used to electrically connect to the pole 200. The pole lug segment 112 is used to electrically connect to the pole lug 51 of the core package. Then, the current collector 100 can also be understood as a pin of a battery. The reinforcement portion 12 is at least partially arranged on a side surface of the pole segment 111 in the thickness direction H1, thereby improving the ability of the pole segment 111 to resist bending deformation, thereby improving the reliability and service life of the battery.

[0060] It can be understood that the reinforcing portion 12 is at least partially arranged on one side surface of the pole segment 111 in the thickness direction H1. The reinforcing portion 12 may be arranged only on one side surface of the pole segment 111 in the thickness direction H1, or the reinforcing portion 12 may be arranged on both side surfaces of the pole segment 111 in the thickness direction H1. The embodiment of the present application does not limit this.

[0061] Furthermore, when the reinforcing portion 12 is only provided on one side surface of the pole segment 111 in the thickness direction, the reinforcing portion 12 may be provided on the inner side surface of the pole segment 111 (i.e., the side surface of the pole segment 111 facing the core package), or may be provided on the outer side surface of the pole segment 111 (i.e., the side surface of the pole segment 111 facing away from the core plate), and the embodiments of the present application do not limit this.

[0062] 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 .

[0063] Please continue to refer to Figure 2 , Figure 2 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.

[0064] 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.

[0065] 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.

[0066] In some embodiments, the reinforcing portion 12 is at least partially disposed around the pole mounting hole and forms a positioning step 1113 disposed around the pole mounting hole. Thus, the positioning step 1113 can facilitate rapid and accurate positioning of the pole 200, so as to improve the production and assembly efficiency of the battery.

[0067] 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.

[0068] 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.

[0069] For example, please refer to Figure 3 and Figure 4 , Figure 3 Schematic diagram of forming multiple arc welding tracks for current collectors. Figure 4 The schematic diagram of the current collector forming a circular 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.

[0070] Continue to refer Figure 2 As mentioned above, at least one side surface of the pole segment 111 in the thickness direction is provided with a reinforcement portion 12. Then, the reinforcement portion 12 may at least partially extend from the pole connection structure 1111 to the bending connection between the pole segment 111 and the pole lug segment 112.

[0071] Thus, the reinforcement portion 12 can improve the strength of the portion of the pole segment 111 located between the pole connection structure 1111 and the pole ear segment 112 to avoid bending, deformation or even breakage of the portion, thereby avoiding short circuits, open circuits, reduced current flow capacity, etc. inside the battery, thereby improving the reliability and service life of the battery.

[0072] It can be understood that the reinforcement portion 12 at least partially extends from the pole connection structure 1111 to the pole lug segment 112. The reinforcement portion 12 may only extend from the pole connection structure 1111 to the pole lug segment 112, or the reinforcement portion 12 may also partially extend to the side of the pole connection structure 1111 away from the pole lug segment 112.

[0073] The bent connecting portion of the pole segment 111 and the pole tab segment 112 may be understood as the boundary line between the pole segment 111 and the pole tab segment 112 .

[0074] For example, the reinforcement portion 12 may extend from one end of the pole segment 111 close to the pole lug segment 112 (i.e., the boundary between the pole segment 111 and the pole lug segment 112) to the end of the pole segment 111 away from the pole lug segment 112, thereby providing good reinforcement effect for each position of the pole segment 111.

[0075] In some embodiments, the reinforcing portion 12 is made of a conductive material, and the reinforcing portion 12 is electrically conductive with the pole segment 111 and / or the pole lug segment 112. Thus, the cross-sectional area of ​​at least a portion of the conductive structure formed by the reinforcing portion 12 and the pole segment 111 is larger, thereby also improving the current flow capacity of the portion of the pole segment 111. Then, it can be understood that the reinforcing portion 12 not only reinforces the physical strength of the pole segment 111, but also reinforces the current flow capacity of the pole segment 111, so as to improve the performance of the battery.

[0076] Of course, the surface area of ​​the whole formed by the reinforcement portion 12 and the pole segment 111 will also be increased relative to the surface area of ​​the pole segment 111. For example, the surface area of ​​the whole formed by the reinforcement portion 12 and the pole segment 111 in the thickness direction is larger, thereby improving the heat dissipation capacity of the pole segment 111 and the entire current collector 100.

[0077] There are various ways to electrically connect the reinforcing portion 12 and the pole segment 111. For example, the reinforcing portion 12 and the pole segment 111 can be integrally bent, so that all parts of the reinforcing portion 12 between the pole connection structure 1111 and the pole lug segment 112 are connected to the side of the pole segment 111 by bending.

[0078] Optionally, the reinforcing portion 12 may be made of a conductive material and attached to the pole segment 111 , so that an electrically conductive structure is formed by the abutment between the reinforcing portion 12 and the pole segment 111 .

[0079] In some embodiments, the reinforcement portion 12 and the current collecting member body 11 are integrally bent and formed.

[0080] Please continue to refer to Figure 5 , Figure 5 for Figure 1In some embodiments, at least one side edge of the current collector body 11 in the width direction H2 is bent and connected to the reinforcing portion 12, so that the reinforcing portion 12 is at least attached to one side surface of the pole segment 111 in the thickness direction H1.

[0081] The outer side of the connection between the reinforcement part 12 and the current collector body 11 can be a curved surface structure 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).

[0082] In some embodiments, the current collecting member body 11 may include a first side 113 and a second side 114 that are oppositely disposed along the width direction H2. Then, the reinforcing portion 12 may be connected only to the first side 113, the reinforcing portion 12 may be connected only to the second side 114, or the reinforcing portion 12 may be partially connected to the first side 113 and partially connected to the second side 114, which is not limited in the present embodiment.

[0083] For example, the reinforcement portion 12 may include a first reinforcement portion 12a and a second reinforcement portion 12b. The first reinforcement portion 12a is bent and connected to the first side 113 to be attached to the pole segment 111, and the second reinforcement portion 12b is bent and connected to the second side 114 to be attached to the pole segment 111.

[0084] The first reinforcement portion 12a and the second reinforcement portion 12b may be disposed opposite to each other along the width direction H2 of the current collector body 11. The first reinforcement portion 12a and the second reinforcement portion 12b may be located on the same side surface of the pole segment 111 in the thickness direction.

[0085] Then, in the actual production process, the current collecting member body 11 can be bent 180 degrees from both sides in the width direction H2 at the same time to form the first reinforcement portion 12a and the second reinforcement portion 12b respectively.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] In some embodiments, along the width direction H2 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.

[0090] In addition, as mentioned above, the pole segment 111 may also be provided with a positioning hole 1112. Then the positioning hole 1112 may be located between the first reinforcement portion 12a and the second reinforcement portion 12b. Thus, the gap between the first reinforcement portion 12a and the second reinforcement portion 12b is fully utilized. Next, the structure of the pole lug segment 112 is first introduced, and the specific structure of the first reinforcement portion 12a and the second reinforcement portion 12b is further explained and illustrated in combination with the structure of the pole lug segment 112.

[0091] Please continue to refer to Figure 6 and Figure 7 , Figure 6 for Figure 1 The second structural schematic diagram of the lug section of the current collector is shown in FIG. Figure 7 for Figure 6The lug connection structure of the current collector is folded to the lug segment body. The lug segment 112 is provided with a lug connection structure 1121 for electrically connecting to the lug 51 , thereby achieving electrical connection between the lug segment 112 and the lug 51 .

[0092] For example, the tab segment 112 includes a tab segment body 1122 and a tab connection structure 1121. The tab segment body 1122 is connected to the pole segment 111, and the tab connection structure 1121 is bendably connected to the tab segment body 1122. The tab connection structure 1121 is used to be welded and fixed to the tab 51. For example, the tab connection structure 1121 can be welded and fixed to the tab 51 by ultrasonic welding or laser welding.

[0093] Then, in the actual assembly process of the battery, it can be as follows Figure 6 The tab connection structure 1121 is first 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, as shown in FIG. Figure 7 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.

[0094] In some embodiments, the tab segment body 1122 and the tab connection structure 1121 may be integrally bent and formed.

[0095] Therefore, when the overall thickness of the current collector 100 is constant, if a thicker single-layer plate is used to replace the current collector body 11 and the reinforcement part 12, the thickness of the pole lug connection structure 1121 will also be correspondingly larger, which will cause the pole lug connection structure 1121 to be too thick and difficult to bend to be flatly attached to the pole lug segment 112. On the other hand, it may also cause more space inside the battery to be wasted at the pole lug segment 112, thereby causing the battery's energy density to decrease.

[0096] In order to facilitate bending of the tab connection structure 1121 , a groove may be provided at the connection between the tab segment body 1122 and the tab connection structure 1121 .

[0097] 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).

[0098] In some embodiments, the number of the tab connection structure 1121 is at least one, and at least one of the first side 113 and the second side 114 is connected to the tab connection structure 1121 .

[0099] 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.

[0100] 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 H2 of the current collector body 11. The first tab connection structure 1121a and the first reinforcement portion 12a are connected to the first side 113, and the first tab connection structure 1121a and the first reinforcement portion 12a have the same width. The second tab connection structure 1121b and the second reinforcement portion 12b are connected to the second side 114, and the second tab connection structure 1121b and the second reinforcement portion 12b have the same width.

[0101] 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.

[0102] Please continue to refer to Figure 8 , Figure 8 A schematic diagram of a structure in which the reinforcement portion of the current collector is folded to the inner side of the current collector body. In some embodiments, one side of the reinforcement portion 12 along the width direction H2 of the current collector body 11 is connected to a bend of the first side edge 113 and the second side edge 114, and the other side of the reinforcement portion 12 along the width direction H2 of the current collector body 11 is disposed adjacent to the other of the first side edge 113 and the second side edge 114.

[0103] 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 of the current collecting body 11 .

[0104] 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 .

[0105] In some embodiments, when the tab segment 112 includes a tab segment body 1122 and a tab connection structure 1121. The tab connection structure 1121 is connected to the first side 113, and the width of the tab connection structure 1121 may be substantially the same as the width of the reinforcing portion 12. Thus, the material utilization rate of the sheet metal used for bending and forming the current collector 100 can be improved.

[0106] Please continue to refer to Fig. 9 , Fig. 9 for Figure 5 The structural schematic diagram of the current collector is shown. In some embodiments, the reinforcement portion 12 includes a connected connecting side 124 and a first 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 first free side 125 is arranged adjacent to a side edge of the pole segment 111 away from the pole lug segment 112. And the first free side 125 is provided with a first air avoidance structure 126, and the first air avoidance structure 126 is retracted to a side edge of the pole segment 111 away from the pole lug segment 112. Furthermore, the end of the first free side 125 away from the connecting side 124 can be limited to protrude outside the current collector body 11 along the length direction.

[0107] Furthermore, after the reinforcing portion 12 is bent to the side attached to the pole segment 111 in the thickness direction, 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 first 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 first 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.

[0108] 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.

[0109] Please continue to refer to Fig.10 , Fig.10 for Fig. 9 In some embodiments, one end of the pole segment 111 away from the pole lug segment 112 is disposed adjacent to the reinforcing portion 12 to form a first end portion of the current collector 100. A clearance gap 127 is disposed at at least one corner of the first end portion.

[0110] For example, after the reinforcing portion 12 is bent to the side attached to the current collector body 11 in the thickness direction, the pole segment 111 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 pole segment 111 away from the pole lug segment 112 and the end of the reinforcing portion 12 away from the pole lug segment 112. Then, in the subsequent battery assembly process, it can be avoided that the free side 125 is close to the end of 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.

[0111] Please continue to refer to Fig.11 , Fig.11 Figure 1 The third structural schematic diagram of the current collector is shown. The current collector body 11 may also include a retaining section 115. The retaining section 115 is connected to one end of the pole lug section 112 away from the pole column section 111. The retaining section 115 protrudes from the side of the pole lug section 112 away from the core package for clamping and fixing by external instruments.

[0112] Furthermore, after the tab connection structure 1121 is welded to the tab 51, the holding section 115 can be clamped by an external device, and then the tab 51 and the tab connection structure 1121 can be bent externally to fold onto the tab section 112. Furthermore, the bending accuracy of the tab connection structure 1121 and the tab 51 can be improved by providing the holding section 115.

[0113] The above are some examples of the current collecting member 100 according to the embodiment of the present application.

[0114] Please continue to refer to Fig.12 , Fig.12 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.

[0115] Please continue to refer to Fig.13 , Fig.13 for Fig.12 Schematic 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.

[0116] 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 .

[0117] 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.

[0118] 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.

[0119] 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.

[0120] The above are some examples of the top cover assembly of the embodiment of the present application.

[0121] An embodiment of the present application also provides a battery, which may include the top cover assembly as described above.

[0122] For example, please continue to refer to Fig.14 and Fig.15 , Fig.14 A schematic diagram of the structure of a battery provided in an embodiment of the utility model, Fig.15 for Fig.14 The 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 stacked on 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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 .

[0127] For example, please continue to refer to Fig.16 , Fig.16 for Fig.15 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.

[0128] 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 .

[0129] 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 .

[0130] The above are some examples of batteries according to the embodiments of the present application.

[0131] An embodiment of the present application also provides an electrical device, which may include the battery as described above.

[0132] 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 sale 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.

[0133] 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 bent and connected pole lug section and a pole column section, the pole lug section being used to be electrically connected to the pole lug of the core package, and the pole column section being provided with a pole column connection structure for being electrically connected to the pole column; and, A reinforcing portion, wherein the reinforcing portion is at least partially disposed on a side surface of the pole segment in the thickness direction, and at least partially extends from the pole connection structure to a bent connection portion between the pole segment and the pole lug segment.

2. The current collecting member according to claim 1, characterized in that: The reinforcement portion is made of a conductive material, and is electrically connected to the pole segment and / or the pole lug segment.

3. The current collecting member according to claim 2, characterized in that: The reinforcement portion is attached to the current collecting member body.

4. The current collecting member according to claim 1, characterized in that: The pole segment comprises a pole mounting hole, the pole mounting hole is used to mount the pole, and the reinforcing portion is at least partially arranged around the pole mounting hole and is formed with a positioning step arranged around the pole mounting hole.

5. The current collecting member according to any one of claims 1 to 4, characterized in that: At least one side edge of the current collecting member body in the width direction is bent and connected to the reinforcing portion, so that the reinforcing portion is at least attached to one side surface of the pole segment in the thickness direction.

6. The current collecting member according to claim 5, 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 reinforcement portion includes a first reinforcement portion and a second reinforcement portion, the first reinforcement portion is connected to the first side edge by bending so as to be attached to the pole segment, and the second reinforcement portion is connected to the second side edge by bending so as to be attached to the pole segment.

7. The current collecting member according to claim 6, characterized in that: The first reinforcement portion and the second reinforcement portion are spaced apart along a width direction of the current collecting member body, and a gap between the first reinforcement portion and the second reinforcement portion is greater than or equal to 0.2 mm.

8. The current collecting member according to claim 6, characterized in that: The pole lug segment includes a pole lug segment body and a pole lug connection structure, the pole lug segment body is connected to the pole column segment, the pole lug connection structure is bendably connected to the pole lug segment body, and the pole lug connection structure is used to be welded and fixed to the pole lug; Wherein, the number of the tab connection structure is at least one, and at least one of the first side and the second side is connected to the tab connection structure; 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.

9. The current collecting member according to claim 6, characterized in that: The pole segment is further provided with a positioning hole, and the positioning hole is at least partially located between the first reinforcement portion and the second reinforcement portion.

10. The current collecting member according to claim 5, 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 is bent and connected to one of the first side and the second side on one side along the width direction of the current collecting body, and is disposed adjacent to the other of the first side and the second side on the other side along the width direction of the current collecting body.

11. The current collecting member according to claim 5, characterized in that: The reinforcing portion includes a connected connecting side and a first free side, the connecting side is connected to one side edge of the collector body in the width direction, the first free side is adjacent to one side edge of the pole segment away from the pole lug segment, and the first free side is provided with a first air avoidance structure, the first air avoidance structure is retracted inwardly to one side edge of the pole segment away from the pole lug segment.

12. The current collecting member according to claim 5, characterized in that: One end of the pole segment facing away from the pole lug segment is arranged adjacent to one end of the reinforcement portion to form a first end portion of the current collector, and a gap is provided at at least one corner of the first end portion.

13. The current collecting member according to claim 5, characterized in that: The outer side of the connection between the current collecting member body and the reinforcement part is a curved surface structure.

14. A top cover assembly, characterized in that: include: Cover body; The current collecting member according to any one of claims 1 to 13, 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.

15. The top cover assembly according to claim 14, characterized in that: Along the length direction of the pole segment, the distance between the center of the pole and the pole lug segment is L2, and the length of the cover body is L1; Among them, 5mm≤L2≤(L1) / 3.

16. 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; and According to the top cover assembly as described in claim 14 or 15, 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.

17. An electrical equipment, characterized in that: Comprising the battery of claim 16.

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