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 and a tab section which are connected in a bending manner, the pole section is used for being electrically connected with a pole, and the tab section is used for being electrically connected with a tab; the reinforcing part is at least partially arranged on the surface of one side, in the thickness direction, of the pole section, and the reinforcing part is at least partially arranged on the surface of one side, in the thickness direction, of the tab section. In the application, the pole section and the tab section of the current collector can be well reinforced through the reinforcing part, so that the overall strength of the current collector 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 of a battery. 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 of the battery.

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

[0007] A current collector body, the current collector body comprising a pole section and a pole lug section connected by bending, the pole section being used to be electrically connected to the pole, and the pole lug section being used to be electrically connected to the pole lug; and,

[0008] A reinforcing portion, wherein the reinforcing portion is at least partially disposed on a side surface of the pole segment in a thickness direction, and the reinforcing portion is at least partially disposed on a side surface of the pole lug segment in a thickness direction.

[0009] In a second aspect, an embodiment of the utility model further provides a top cover assembly of a battery, comprising:

[0010] Cover body;

[0011] As the current collecting member mentioned above, the current collecting member is installed on the cover body; and

[0012] A pole is mounted on the cover and is electrically connected to the pole segment.

[0013] In a third aspect, an embodiment of the utility model further provides a battery, comprising:

[0014] A housing, wherein the housing is provided with a mounting cavity;

[0015] A core package, the core package is arranged in the installation cavity, and the core package is provided with the pole ear; and

[0016] As in the top cover assembly described above, the cover body is stacked on the shell to close the installation cavity, and the pole tab segment is electrically connected to the pole tab.

[0017] In a fourth aspect, an embodiment of the present invention further provides an electrical device, comprising the battery as described above.

[0018] Beneficial effects of the embodiments of the utility model:

[0019] In the embodiments of the utility model, the part of the reinforcing portion located in the pole segment can reinforce the pole segment, and the part of the reinforcing portion located in the pole ear segment can reinforce the pole ear segment, 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

[0020] 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.

[0021] 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.

[0022] Figure 2 for Figure 1 Schematic diagram of the structure of the current collecting component shown.

[0023] Figure 3 for Figure 1 The schematic diagram of the current collecting piece forming multiple arc-shaped welding tracks is shown.

[0024] Figure 4 for Figure 1 The schematic diagram of the current collecting piece forming a circular ring-shaped welding track is shown.

[0025] Figure 5 for Figure 1 Schematic diagram of the tab connection structure of the current collector folded onto the tab segment body.

[0026] Figure 6 for Figure 1 A schematic diagram of the second tab connection structure of the current collector folded onto the tab segment body.

[0027] Figure 7 for Figure 1 A schematic diagram of a second tab connection structure of a current collector is shown.

[0028] Figure 8 for Figure 1 A schematic structural diagram of the first part and the second part of the reinforcement portion in the current collecting member is shown.

[0029] Fig. 9 for Figure 1 A schematic structural diagram of the current collecting member in which the third portion of the reinforcement portion is folded to the inner side of the current collecting member body.

[0030] Fig.10 for Fig. 9 Schematic diagram of the structure of the current collecting member from another perspective.

[0031] Fig.11 Figure 1 A second structural schematic diagram of the current collecting member is shown.

[0032] Fig.12 for Fig.11 A partial enlarged view of the X in FIG.

[0033] Fig.13 Figure 1 A third structural schematic diagram of the current collecting member is shown.

[0034] Fig.14 for Fig.13 A local enlarged view of point Y in the figure.

[0035] Fig.15 A schematic structural diagram of a top cover assembly provided in an embodiment of the utility model.

[0036] Fig.16 for Fig.15 Schematic diagram of the dimensional parameters of the top cover assembly shown.

[0037] Fig.17 A schematic structural diagram of a battery provided in an embodiment of the utility model.

[0038] Fig.18 for Fig.17 The cross-sectional view of the battery along the PP direction is shown.

[0039] Fig.19 for Fig.18 Schematic diagram of the size parameters of the current collector of the battery shown. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Please refer to Figure 1 , Figure 1 1 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.

[0044] 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 be electrically connected to the pole 200. The pole lug segment 112 is used to be electrically connected to the pole lug 51. The reinforcement portion 12 is at least partially disposed on one side surface of the current collector body 11 in the thickness direction, thereby improving the ability of the current collector body 11 to resist bending deformation, thereby improving the reliability and service life of the battery.

[0045] It can be understood that the reinforcing portion 12 is at least partially arranged on one side surface of the current collecting component body 11 in the thickness direction. The reinforcing portion 12 may be arranged only on one side surface of the current collecting component body 11 in the thickness direction, or the reinforcing portion 12 may be arranged on both side surfaces of the current collecting component body 11 in the thickness direction. The embodiment of the present application does not limit this.

[0046] Furthermore, when the reinforcing portion 12 is only provided on one side surface of the current collecting component body 11 in the thickness direction, the reinforcing portion 12 may be provided on the inner side surface of the current collecting component body 11 (i.e., the side surface of the current collecting component body 11 facing the core package), or may be provided on the outer side surface of the current collecting component body 11 (i.e., the side surface of the current collecting component body 11 facing away from the core package), and the embodiments of the present application do not limit this.

[0047] It can also be understood that the reinforcing portion 12 is at least partially disposed on one side surface of the current collector body 11 in the thickness direction. The reinforcing portion 12 may be at least partially disposed on one side surface of the pole segment 111 in the thickness direction H1, or the reinforcing portion 12 may be at least partially disposed on one side surface of the pole lug segment 112 in the thickness direction H2. Of course, the reinforcing portion 12 may also be at least partially disposed on one side surface of other parts of the current collector body 11 (such as the holding segment to be introduced later) in the thickness direction.

[0048] For example, only at least one side surface of the pole segment 111 in the thickness direction H1 may be provided with a reinforcing portion 12, or only at least one side surface of the pole tab segment 112 in the thickness direction H2 may be provided with a reinforcing portion 12, or at least one side surface of both the pole segment 111 and the pole tab segment 112 in the thickness direction may be provided with a reinforcing portion 12, and the embodiments of the present application are not limited to this.

[0049] In some embodiments, along the length direction of the current collector body 11, the widths of the pole segment 111 and the pole lug segment 112 can be roughly equal, so that the pole segment 111 and the pole lug segment 112 can be made wider to improve the current flow capacity of the pole segment 111 and the pole lug segment 112. At the same time, taking the current collector body 11 as a sheet metal part as an example, the material waste caused by the pole segment 111 and / or the pole lug segment 112 being partially concave or convex can also be reduced.

[0050] 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 .

[0051] 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.

[0052] 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.

[0053] 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 lug 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 current collector body 11 can be limited to rotate or move relative to the battery cover 300 through the cooperation between the positioning hole 1112 and the positioning column.

[0054] 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.

[0055] 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.

[0056] 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 pole connection structure 1111 and the pole 200, it is within the protection scope of the pole connection structure 1111 of the present application.

[0057] For example, please refer to Figure 3 and Figure 4 , Figure 3 for Figure 1 The schematic diagram of the current collecting piece forming multiple arc-shaped welding tracks is shown. Figure 4 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.

[0058] Please combine Figure 2 and Figure 5 , Figure 5 for Figure 1 The schematic diagram of the current collector tab connection structure shown is folded to the tab segment body. Next, the technical solution of the embodiment of the present application will be described with examples in conjunction with the tab segment 112.

[0059] The pole tab segment 112 is provided with a pole tab connection structure 1121 for electrically connecting to the pole tab 51 , thereby achieving electrical connection between the pole tab segment 112 and the pole tab 51 .

[0060] For example, the pole tab segment 112 includes a pole tab segment body 1122 and a pole tab connection structure 1121. The pole tab segment body 1122 is connected to the pole column segment 111, and the pole tab connection structure 1121 is bendably connected to the pole tab segment body 1122. The pole tab connection structure 1121 is used to be welded and fixed to the pole tab 51.

[0061] For example, the tab connection structure 1121 may be used to be welded and fixed to the tab 51 by ultrasonic welding or laser welding.

[0062] Then, in the actual assembly process of the battery, if Figure 2 As shown, the tab connection structure 1121 may be first vertically connected to the tab segment body 1122, so as to stand up the tab segment 112 and weld it to the tab 51. After the tab connection structure 1121 is welded and fixed to the tab 51, as shown in FIG. Figure 5 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.

[0063] Please refer to Figure 5 and Figure 6 , Figure 6 for Figure 1 The schematic diagram of the second type of the current collector tab connection structure folded to the tab segment body is shown. It is understandable that the number of the tab connection structure 1121 can be one, or multiple such as two, three, four or five, which is not limited in the present embodiment.

[0064] 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 H3 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.

[0065] For example, the difference between the width of each tab connection structure 1121 and the width of its weld printing area may 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.

[0066] In some embodiments, the tab segment body 1122 and the tab connection structure 1121 may be integrally bent and formed.

[0067] 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 .

[0068] 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).

[0069] Among them, along the width direction H3 of the current collector body 11, the ratio of the width of the pole lug segment main body 1122 to the pole column segment 111 is 0.8-1.2. Therefore, the portion of the pole lug segment main body 1122 connected to the pole lug connection structure 1121 along the width direction H3 of the current collector body 11 can be made without obvious inward or outward shrinkage or outward bulging, thereby improving the material utilization rate of the sheet metal raw material on the one hand, and improving the strength and current flow capacity of the pole lug segment 112 on the other hand.

[0070] As mentioned above, in some embodiments, at least one side surface of the tab segment 112 in the thickness direction H2 is provided with a reinforcement portion 12. Figure 5 As shown, one side surface of the tab segment body 1122 in the thickness direction H2 includes a first region 1124 and a second region 1123. The reinforcement portion 12 is partially attached to the first region 1124. The tab connection structure 1121 can be bent to be attached to the second region 1123.

[0071] Illustratively, before the pole tab connection structure 1121 is welded to the pole tab 51 , the pole tab connection structure 1121 is vertically connected to the pole tab segment body 1122 ; after the pole tab connection structure 1121 is welded to the pole tab 51 , the pole tab connection structure 1121 is bent to be attached to the second region 1123 .

[0072] Exemplarily, before the tab connection structure 1121 is welded to the tab 51 , the tab connection structure 1121 is bent to be attached to the second region 1123 , and then the tab connection structure 1121 is welded to the tab 51 .

[0073] Furthermore, at the pole lug segment 112, the reinforcement portion 12 and the bent pole lug connection structure 1121 can be arranged side by side on the same side surface of the thickness direction H2 of the pole lug segment main body 1122. Then, compared with the pole lug segment main body 1122, the reinforcement portion 12 and the pole lug connection structure 1121 being stacked in sequence, the embodiment of the present application can effectively reduce the total thickness of the pole lug segment 112, so that the internal structure of the battery can be more compact, thereby improving the energy density of the battery.

[0074] Please continue to refer to Figure 7 , Figure 7 for Figure 1 Schematic diagram of the second type of pole lug connection structure of the current collector shown. In this embodiment, at least part of the reinforcement portion 12 can extend from the pole connection structure 1111 through the bent connection portion of the pole segment 111 and the pole lug segment 112 to the pole lug connection structure 1121. Thus, the strength of the portion of the current collector body 11 between the pole lug connection structure 1121 and the pole connection structure 1111 can be strengthened by the reinforcement portion 12 to avoid bending deformation or even fracture of the portion, thereby avoiding short circuit, open circuit, and reduced current flow capacity inside the battery, thereby improving the reliability and service life of the battery.

[0075] It should be noted that the portion where the pole segment 111 and the pole tab segment 112 are bent and connected can be understood as the boundary line between the pole segment 111 and the pole tab segment 112 .

[0076] In the embodiment of the present application, the reinforcing portion 12 extends to the tab connection structure 1121, and the reinforcing portion 12 and the tab connection structure 1121 may be spaced apart from each other, thereby having a certain gap. Of course, in other embodiments, the reinforcing portion 12 and the tab connection structure 1121 may also partially overlap or fit, and the present application does not limit this.

[0077] In the embodiment of the present application, the reinforcing portion 12 may pass through the bending connection between the pole section 111 and the pole ear section 112 from the pole connection structure 1111, and the reinforcing portion 12 and the pole connection structure 1111 may be spaced apart from each other, thereby having a certain gap. Of course, in other embodiments, the reinforcing portion 12 and the pole connection structure 1111 may also partially overlap or fit, and the present application does not limit this.

[0078] The reinforcement portion 12 may include a first reinforcement portion 121 and a second reinforcement portion 122. The first reinforcement portion 121 at least partially extends from the pole connection structure 1111 to the pole lug section 112, and the second reinforcement portion 122 at least partially extends from the pole lug connection structure 1121 to the pole section 111. Then, the first reinforcement portion 121 and the second reinforcement portion 122 may be bent and connected, so that the reinforcement portion 12 may at least partially extend from the pole connection structure 1111 to the pole lug connection structure 1121.

[0079] The first reinforcement part 121 is electrically connected to the pole segment 111, and the second reinforcement part 122 is electrically connected to the pole lug segment 112. Thus, the first reinforcement part 121 and the second reinforcement part 122 can also form a flow-through structure for current to flow from the pole lug connection structure 1121 to the pole column connection structure 1111, so as to increase the flow-through energy of the current collector 100 from the pole lug connection structure 1121 to the pole column connection structure 1111, thereby improving the performance of the battery.

[0080] The reinforcing part 12 is made of conductive material, and the part of the reinforcing part located between the pole connection structure 1111 and the pole ear connection structure 1121 is attached to the current collector body 11. Thus, the cross-sectional area of ​​the current collector 100 from the pole ear connection structure 1121 to the pole connection structure 1111 is increased, so as to increase the flow energy of the current collector 100 from the pole ear connection structure 1121 to the pole connection structure 1111, thereby improving the performance of the battery.

[0081] In some other embodiments, the reinforcing portion 12 may include the first reinforcing portion 121 but not the second reinforcing portion 122 , or the reinforcing portion 12 may include the second reinforcing portion 122 but not the first reinforcing portion 121 .

[0082] Then, when the reinforcement portion 12 includes the first reinforcement portion 121, the first reinforcement portion 121 at least partially extends from the pole connection structure 1111 to the bending connection between the pole segment 111 and the pole lug segment 112. For example, the first reinforcement portion 121 may only extend from the pole connection structure 1111 to the bending connection between the pole segment 111 and the pole lug segment 112, or the first reinforcement portion 121 may also partially extend to the side of the pole connection structure 1111 away from the pole lug segment 112, which is not limited in the embodiment of the present application.

[0083] For example, the first reinforcement portion 121 may extend from one end of the pole segment 111 close to the pole lug segment 112 (i.e., the bent connection between the pole lug segment 112 and the pole segment 111) to one 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.

[0084] Accordingly, the first reinforcement portion 121 and the pole segment 111 can be electrically connected in various ways. For example, the first reinforcement portion 121 and the pole segment 111 can be integrally bent, so that all locations of the first reinforcement portion 121 between the pole connection structure 1111 and the pole lug segment 112 are connected to the side of the pole segment 111 by bending.

[0085] Optionally, the first reinforcement portion 121 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 first reinforcement portion 121 and the pole segment 111 .

[0086] For example, the first reinforcement portion 121 may be formed by being bent integrally with the pole segment 111 , so that the first reinforcement portion 121 is attached to at least one side surface of the pole segment 111 in the thickness direction H1 .

[0087] When the reinforcement portion 12 includes the second reinforcement portion 122, the second reinforcement portion 122 at least partially extends from the pole tab connection structure 1121 to the bending connection between the pole segment 111 and the pole tab segment 112. For example, the second reinforcement portion 122 may only extend from the pole tab connection structure 1121 to the bending connection between the pole segment 111 and the pole tab segment 112, or the second reinforcement portion 122 may also partially extend to the side of the pole tab connection structure 1121 away from the pole segment 111, which is not limited in the embodiment of the present application.

[0088] For example, the second reinforcement portion 122 may extend from one end of the pole lug segment 112 close to the pole segment 111 (i.e., the bent connection between the pole lug segment 112 and the pole segment 111) to one end of the pole lug segment 112 away from the pole segment 111, thereby providing good reinforcement effect for each position of the pole segment 111.

[0089] There are various ways to electrically connect the second reinforcement part 122 and the pole lug segment 112. For example, the second reinforcement part 122 and the pole lug segment 112 may be integrally bent and formed. Furthermore, the second reinforcement part 122 may be connected to the side of the pole lug segment 112 at all locations between the pole lug connection structure 1121 and the pole column segment 111.

[0090] Optionally, the second reinforcement portion 122 may be made of a conductive material and attached to the pole tab segment 112 , so that an electrically conductive structure is formed by the abutment between the second reinforcement portion 122 and the pole tab segment 112 .

[0091] For example, the second reinforcement portion 122 and the pole tab segment 112 may be integrally bent and formed, so that the second reinforcement portion 122 is attached to at least one side surface of the pole tab segment 112 in the thickness direction H2 .

[0092] In some embodiments, the reinforcement part 12 is integrally bent with the current collector body 11. 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 tab connection structure 1121 will be correspondingly larger, which will cause the tab connection structure 1121 to be too thick and difficult to be bent to be flatly stacked on the tab segment 112. On the other hand, it may also cause more space inside the battery to be wasted at the tab segment 112, thereby reducing the energy density of the battery.

[0093] It can also be understood that 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 formation of a straight edge at the bent connection between the reinforcement part 12 and the current collector body 11, thereby causing damage to the interior of the battery (such as the insulating film).

[0094] In some embodiments, at least one edge of the current collecting body 11 in the width direction H3 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.

[0095] Then, when the reinforcing portion 12 includes the first reinforcing portion 121 , at least one side edge of the current collecting body 11 in the width direction H3 may be bent and connected to the first reinforcing portion 121 , so that the reinforcing portion 12 is attached to at least one side surface of the current collecting body 11 in the thickness direction.

[0096] When the reinforcing portion 12 includes the second reinforcing portion 122 , at least one side edge of the current collecting body 11 in the width direction H3 may be bent and connected to the second reinforcing portion 122 , so that the reinforcing portion 12 is attached to at least one side surface of the current collecting body 11 in the thickness direction.

[0097] In addition, when the reinforcing portion 12 also includes other parts (such as the third reinforcing portion to be introduced later), the other parts of the reinforcing portion 12 (such as the third reinforcing portion to be introduced later) can also be connected to the side edge of the width direction H3 of the current collecting component body 11 by bending, so that the reinforcing portion 12 is folded to at least one side surface of the thickness direction of the current collecting component body 11.

[0098] Please refer to Figure 7 and Figure 8 , Figure 8 for Figure 1A schematic diagram of the structure of the first and second parts of the reinforcement part in the current collector shown. The current collector body 11 may include a first side 113 and a second side 114 that are arranged opposite to each other along the width direction H3. Then, the reinforcement part 12 may be connected only to the first side 113, the reinforcement part 12 may 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.

[0099] For example, the reinforcing portion 12 may include a first portion 12a and a second portion 12b. The first portion 12a is connected to the first side edge 113 by bending, and the second portion 12b is connected to the second side edge 114 by bending.

[0100] The first portion 12a and the second portion 12b may be disposed opposite to each other along the width direction H3 of the current collecting body 11. The first portion 12a and the second portion 12b are located on the same side surface of the current collecting body 11 in the thickness direction.

[0101] Then, in the actual production process, both sides of the current collecting member body 11 in the width direction can be bent inward by 180 degrees at the same time to form the first part 12a and the second part 12b respectively.

[0102] It can also be understood that the first portion 12a may only form the first reinforcement portion 121, the first portion 12a may only form the second reinforcement portion 122, or the first portion 12a may partially form the second reinforcement portion 122 and partially form the first reinforcement portion 121. The second portion 12b may only form the first reinforcement portion 121, the second portion 12b may only form the second reinforcement portion 122, or the second portion 12b may partially form the second reinforcement portion 122 and partially form the first reinforcement portion 121, and the embodiment of the present application does not limit this.

[0103] For example, the first reinforcing portion 121 includes a first folding portion 1211 and a second folding portion 1212. The first folding portion 1211 and the second folding portion 1212 are arranged opposite to each other along the width direction H3 of the current collecting member body 11. The first folding portion 1211 is formed in one of the first portion 12a and the second portion 12b, and the second folding portion 1212 is formed in the other of the first portion 12a and the second portion 12b.

[0104] The second reinforcing portion 122 may also include a third folding portion 1221 and a fourth folding portion 1222. The third folding portion 1221 and the fourth folding portion 1222 are disposed opposite to each other along the width direction H3 of the current collecting member body 11. The third folding portion 1221 is formed in one of the first portion 12a and the second portion 12b, and the fourth folding portion 1222 is formed in the other of the first portion 12a and the second portion 12b.

[0105] In some embodiments, the third folding portion 1221 and the tab connection structure 1121 may be disposed side by side on the same side of the fourth folding portion 1222 .

[0106] In some embodiments, the third folding portion 1221 and the tab connection structure 1121 may be arranged at intervals. Then, on the one hand, in the actual production process of the battery, the third folding portion 1221 attached to the tab segment 112 may be first bent, and the tab connection structure 1121 may be bent perpendicular to the tab segment 112. At this time, since the third folding portion 1221 and the tab connection structure 1121 are arranged at intervals, the third folding portion 1221 and the tab connection structure 1121 may be bent into different angles more conveniently and accurately. On the other hand, when the tab connection structure 1121 needs to be bent to be attached to the tab segment 112 after being welded to the tab 51, even if there is a certain deviation in the position accuracy of the bending of the tab connection structure 1121, so that the tab connection structure 1121 is tilted toward the third folding portion 1221, the third folding portion 1221 and the tab connection structure 1121 are less likely to interfere with each other.

[0107] In some embodiments, the gap between the first portion 12a and the second portion 12b may be greater than or equal to 0.2 mm along the width direction H3 of the current collector body 11. Therefore, it can also be understood that a margin is reserved between the first portion 12a and the second portion 12b to prevent the second portion 12b from interfering with each other when the first portion 12a and the second portion 12b are formed by bending through a bending process, thereby improving the reliability and molding quality of the current collector body 11 after bending.

[0108] For example, along the width direction H3 of the current collecting body 11, the gap between the first part 12a and the second part 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.

[0109] In some embodiments, the gap C between the first part 12a and the second part 12b can be 0.5 to 1 mm. Furthermore, on the one hand, by the gap between the first part 12a and the second part 12b being greater than or equal to 0.5 mm, the first part 12a and the second 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 between the first part 12a and the second part 12b being less than or equal to 1 mm, the first part 12a and the second 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.

[0110] In some embodiments, along the width direction H3 of the current collecting body 11, the width of the current collecting body 11 may be W1, the width of the first portion 12a may be A, the gap between the first portion 12a and the second portion 12b may be C, and the width of the second portion 12b may be B, then B=WAC.

[0111] In some embodiments, when the pole segment 111 is further provided with a positioning hole 1112, the positioning hole 1112 is at least partially located between the first portion 12a and the second portion 12b. Therefore, the positioning hole 1112 will not be closed after the first portion 12a and the second portion 12b are bent, so there is no need to further perform punching operations, so that the manufacturing of the current collector 100 is simpler.

[0112] In some embodiments, when the tab segment 112 includes a tab segment body 1122 and a tab connection structure 1121 , there is at least one tab connection structure 1121 . At least one of the first side 113 and the second side 114 is connected to the tab connection structure 1121 .

[0113] Correspondingly, the ratio of the tab connection structure 1121 to the first portion 12a or the second 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 portion 12a or the second 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.

[0114] For example, the tab connection structure 1121 may include a first tab connection structure 1121a and a second tab connection structure 1121b that are disposed opposite to each other along the width direction H3 of the current collector body 11. The first tab connection structure 1121a and the first portion 12a are connected to the first side 113, and the widths of the first tab connection structure 1121a and the first portion 12a are substantially the same. The second tab connection structure 1121b and the second portion 12b are connected to the second side 114, and the widths of the second tab connection structure 1121b and the second portion 12b are substantially the same.

[0115] 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.

[0116] It is understandable that, as mentioned above, the first folding portion 1211 and the second folding portion 1212 can be formed by the first part 12a and the second part 12c, respectively. Therefore, the gap between the first folding portion 1211 and the second folding portion 1212 can refer to the gap between the first part 12a and the second part 12b described above, and the embodiment of the present application will not be repeated here. Also, the dimensional relationship between the first folding portion 1211 and the second folding portion 1212 and the tab connection structure 1121 can refer to the dimensional relationship between the first part 12a and the second part 12b and the tab connection structure 1121 described above, and the embodiment of the present application will not be repeated here.

[0117] It can also be understood that, as mentioned above, the third folding portion 1221 and the fourth folding portion 1222 can be formed by the first part 12a and the second part 12c, respectively. Then, the gap between the third folding portion 1221 and the fourth folding portion 1222 can refer to the gap between the first part 12a and the second part 12b mentioned above, and the embodiment of the present application will not be repeated here. And, the dimensional relationship between the third folding portion 1221 and the fourth folding portion 1222 and the tab connection structure 1121 can refer to the relationship between the first part 12a and the second part 12b and the tab connection structure 1121 mentioned above, and the embodiment of the present application will not be repeated here.

[0118] Please continue to refer to Fig. 9 and Fig.10 , Fig. 9 for Figure 1 A schematic diagram of the structure in which the third part of the reinforcement portion of the current collector is folded to the inner side of the current collector body, Fig.10 for Fig. 9Schematic diagram of the structure of the current collector from another perspective. In some embodiments, the reinforcing portion 12 may include a third portion 12c. The third portion 12c is connected to one of the first side edge 113 and the second side edge 114 along one side of the width direction H3 of the current collector body 11, and the third portion 12c is disposed adjacent to the other of the first side edge 113 and the second side edge 114 along the other side of the width direction H3 of the current collector body 11.

[0119] Therefore, in the actual bending process, the third portion 12 c is bent from only one side of the current collecting body 11 to cover all parts in the width direction H3 of the current collecting body 11 .

[0120] In some embodiments, along the width direction H3 of the current collecting body 11 , the width of the third portion 12 c is smaller than the width of the current collecting body 11 .

[0121] 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 can be the same as the width of the third portion 12c. Thus, the material utilization rate of the sheet metal used for bending and forming the current collector 100 can be improved.

[0122] Then, when the reinforcing portion 12 includes the first reinforcing portion 121, the first reinforcing portion 121 may be formed by the third portion 12c. Therefore, the first reinforcing portion 121 may be connected to one of the first side edge 113 and the second side edge 114 along one side of the width direction H3 of the current collecting member body 11, and the first reinforcing portion 121 may be disposed adjacent to the other of the first side edge 113 and the second side edge 114 along the other side of the width direction H3 of the current collecting member body 11.

[0123] When the reinforcing portion 12 includes the second reinforcing portion 122, the second reinforcing portion 122 may be formed by the third portion 12c. Therefore, the second reinforcing portion 122 may be connected to one of the first side edge 113 and the second side edge 114 along one side of the width direction H3 of the current collecting member body 11, and the second reinforcing portion 122 may be disposed adjacent to the other of the first side edge 113 and the second side edge 114 along the other side of the width direction H3 of the current collecting member body 11.

[0124] And, when the reinforcing portion 12 further includes other parts (such as the third reinforcing portion to be introduced later), the other parts (such as the third reinforcing portion to be introduced later) can be formed by the third part 12c mentioned above. Therefore, the other parts (such as the third reinforcing portion to be introduced later) can be connected to one of the first side 113 and the second side 114 along one side of the width direction H3 of the current collector body 11, and the other parts (such as the third reinforcing portion to be introduced later) are arranged adjacent to the other of the first side 113 and the second side 114 along the other side of the width direction H3 of the current collector body 11.

[0125] Please continue to refer to Fig.11 , Fig.11 Figure 1 A second structural schematic diagram of the current collector is shown. In some embodiments, the reinforcing portion 12 includes a connected connecting side 124 and a free side 125. The connecting side 124 is connected to a side edge of the current collector body 11 in the width direction H3. The free side 125 is disposed adjacent to one of the side edges in the length direction of the current collector body 11. The free side 125 is provided with a space-avoiding structure 126, which is retracted into a side edge of the current collector body 11 adjacent to the space-avoiding structure 126 to limit the end of the 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.

[0126] Furthermore, after the reinforcing portion 12 is bent to the side attached to the current collector body 11 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 air avoidance structure 126 can prevent the end of the 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 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.

[0127] The 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.

[0128] For example, please continue to refer to Fig.12 , Fig.12 for Fig.11 The free side 125 includes a first free side 1251. The first free side 1251 is disposed adjacent to a side edge of the pole segment 111 away from the pole lug segment 112. The air avoidance structure 126 includes a first air avoidance structure disposed on the first free side 1251. Thus, a sharp angle can be avoided at one end of the pole segment 111 away from the pole lug segment 112.

[0129] Please continue to refer to Fig.13 , Fig.13 Figure 1 The third structural schematic diagram of the current collector is shown. In some embodiments, the free side 125 further includes a second free side 1252. The second free side 1252 is disposed adjacent to a side edge of the current collector body 11 that is away from the pole segment 111, and the air avoidance structure 126 includes a second air avoidance structure disposed on the second free side 1252. Thus, it is possible to avoid forming a sharp corner at one end of the electrical connection portion that is away from the pole segment 111.

[0130] It can also be understood that the end of the pole lug segment 112 away from the pole segment 111 can form the end of the current collector body 11 away from the pole segment 111, or the current collector body 11 can also include other structures, which are connected to the end of the pole lug segment 112 away from the pole segment 111. This embodiment of the application is not limited to this.

[0131] For example, please continue to refer to Fig.14 , Fig.14 for Fig.13 The current collector body 11 may further 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 surface of the pole lug section 112 away from the core package, so as to be clamped and fixed by an external instrument.

[0132] 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 entirety of 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. Furthermore, the force of the current collector 100 when the tab connection structure 1121 and the tab 51 are bent can be transmitted to the external device, thereby preventing the current collector 100 from crushing the core package.

[0133] In some embodiments, the ratio of the width of the holding section 115 to the width of the tab section 112 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 embodiment of the present application, so that the width of the holding section 115 and the tab section 112 are substantially the same. Furthermore, on the one hand, the holding section 115 and the tab section 112 can be made wider to improve the strength of the holding section 115 and the tab section 112, and on the other hand, the utilization rate of the sheet metal raw material can be improved.

[0134] In some embodiments, the reinforcing portion 12 is at least partially disposed on one side surface of the holding section 115 in the thickness direction H2. For example, the reinforcing portion 12 may be disposed only on one side surface of the holding section 115 in the thickness direction H2, or may be disposed on both side surfaces of the holding section 115 in the thickness direction H2, which is not limited in the present embodiment.

[0135] Exemplarily, the reinforcing portion 12 may further include a third reinforcing portion 123. The third reinforcing portion 123 is disposed on at least one side surface of the holding section 115 in the thickness direction H2. Thus, the strength of the holding section 115 can be effectively improved by the third reinforcing portion 123, so that an external device can clamp the holding section 115 more firmly, thereby improving the bending accuracy of the tab connection structure 1121 and the tab 51.

[0136] In some embodiments, the third reinforcing portion 123 may be connected to the holding section 115 by bending so as to be attached to a side surface of the holding section 115 in the thickness direction H2.

[0137] Then, the third reinforcement portion 123 may include a connected connecting side 124 and a second free side 1252. The connecting side 124 is connected to a side edge of the holding section 115 along the width direction H3 of the current collector body 11. The second free side 1252 is arranged adjacent to a side edge of the holding section 115 away from the pole lug section 112, and an end of the second free side 1252 away from the connecting side 124 is provided with a clearance structure 126 (i.e., the second clearance structure mentioned above), and the clearance structure 126 is retracted to a side edge of the holding section 115 away from the pole lug section 112 to limit the end of the second free side 1252 away from the connecting side 124 from protruding from the side of the holding section 115 away from the pole lug section 112.

[0138] In some embodiments, the third reinforcement portion 123 can be spaced apart from the tab connection structure 1121. Then, on the one hand, in the actual production process of the battery, the third reinforcement portion 123 that is superimposed on the holding section 115 can be first bent to form the tab connection structure 1121 that is perpendicular to the tab section 112. At this time, since the third reinforcement portion 123 and the tab connection structure 1121 are spaced apart, the third reinforcement portion 123 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 pole section 111 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 third reinforcement portion 123, the third reinforcement portion 123 and the tab connection structure 1121 are less likely to interfere with each other.

[0139] For example, the third reinforcing portion 123 may include a fifth folding portion 1231 and a sixth folding portion 1232 that are oppositely disposed along the width direction H3 of the current collecting member body 11 . The fifth folding portion 1231 is connected to the first side 113 , and the sixth folding portion 1232 is connected to the second side 114 .

[0140] Then, the fifth folded portion 1231 and the tab connection structure 1121 may be both formed by bending from the first side edge 113 , and the fifth folded portion 1231 and the tab connection structure 1121 may be spaced apart along the length direction of the current collector body 11 .

[0141] The width of the fifth folded portion 1231 may be substantially the same as the width of the tab connection structure 1121. Thus, the material utilization rate of the sheet metal used for bending and forming the current collecting member 100 may be improved.

[0142] As mentioned above, the reinforcing portion 12 may include a first portion 12a and a second portion 12b. The first portion 12a is connected to the first side edge 113 by bending, and the second portion 12b is connected to the second side edge 114 by bending. Then, the portion of the first portion 12a located at the holding section 115 may form the fifth folded portion 1231, and the portion of the second portion 12b located at the holding section 115 may form the sixth folded portion 1232.

[0143] Therefore, the gap between the fifth folding portion 1231 and the sixth folding portion 1232 can refer to the gap between the first portion 12a and the second portion 12b, and the embodiment of the present application is not repeated here. Also, the size relationship between the fifth folding portion 1231 and the sixth folding portion 1232 and the tab connection structure 1121 can refer to the size relationship between the first portion 12a and the second portion 12b and the tab connection structure 1121, and the embodiment of the present application is not repeated here.

[0144] In some embodiments, the third reinforcement portion 123 is connected to a bend of one of the first side edges 113 and the second side edges 114 along one side of the width direction H3 of the current collecting body 11, and the third reinforcement portion 123 is arranged adjacent to the other of the first side edges 113 and the second side edges 114 along the other side of the width direction H3 of the current collecting body 11.

[0145] As mentioned above, the reinforcing portion 12 may include a third portion 12c. One side of the third portion 12c along the width direction H3 of the current collector body 11 is connected to one of the first side edge 113 and the second side edge 114 by a bend, and the other side of the third portion 12c along the width direction H3 of the current collector body 11 is disposed adjacent to the other of the first side edge 113 and the second side edge 114. Then, the third reinforcing portion 123 may be formed by the portion of the third portion located in the retaining section 115.

[0146] In some embodiments, the reinforcing portion 12 includes a connecting side 124 and a free side 125. The connecting side 124 is connected to a side edge of the current collecting body 11 in the width direction H3. The free side 125 is disposed adjacent to one side edge of the current collecting body 11 in the length direction to form an end of the current collecting body 100 in the length direction. At least one corner of the end of the current collecting body 100 provided with the free side 125 is provided with a clearance gap 127.

[0147] For example, after the reinforcing portion 12 is bent to the side attached to the current collector body 11 in the thickness direction, the holding section 115 and the reinforcing portion 12 are punched out together to form a second air-avoiding structure through a punching process, so as to avoid the formation of a sharp angle at the connection between the end of the holding 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 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.

[0148] It is understandable that, as mentioned above, the free side 125 may include a first free side 1251 and a second free side 1252. Then, the air-avoiding notch 127 may be provided only at the first free side 1251, the air-avoiding notch 127 may be provided only at the second free side 1252, or both the first free side 1251 and the second free side 1252 may be provided. The embodiments of the present application do not limit this.

[0149] In some embodiments, a free side 125 may be provided with a clearance gap 127 at one end close to the connecting side 124, and a free side 125 may be provided with a clearance structure 126 at one end away from the connecting side 124. Of course, the current collector 100 may be provided with only the clearance structure 126, only the clearance gap 127, or both the clearance structure 126 and the clearance gap 127, which is not limited in the embodiments of the present application.

[0150] The above are some examples of the current collecting member 100 according to the embodiment of the present application.

[0151] Please continue to refer to Fig.15 , Fig.15 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.

[0152] Please continue to refer to Fig.16 , Fig.16 for Fig.15 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.

[0153] 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 .

[0154] 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.

[0155] 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.

[0156] 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.

[0157] The above are some examples of the top cover assembly of the embodiment of the present application.

[0158] An embodiment of the present application also provides a battery, which may include the top cover assembly as described above.

[0159] For example, please continue to refer to Fig.17 and Fig.18 , Fig.17 A schematic diagram of the structure of a battery provided in an embodiment of the utility model, Fig.18 for Fig.17The 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.

[0160] 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.

[0161] In some embodiments, along the width direction H3 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 H3 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.

[0162] For example, along the width direction H3 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.

[0163] In some embodiments, the thickness direction H2 of the tab segment 112 is the same as the length direction of the battery, and the ratio of the thickness of the current collector 100 to the length of the battery is 0.0025-0.05. For example, the ratio of the thickness of the current collector 100 to the length of the battery is 0.0025, 0.0028, 0.005, 0.0089, 0.01, 0.014, 0.019, 0.02, 0.025, 0.03, 0.037, 0.0396, 0.045, 0.0487 or 0.05, which is not limited in the embodiments of the present application.

[0164] Thus, it is possible to avoid the problem of insufficient strength and / or insufficient current flow capacity due to the current collecting piece 100 being too thin, and the current collecting piece 100 can be made thinner so that the space occupied by the current collecting piece 100 in the shell 400 is smaller, so that a larger core pack 500 can be arranged in the shell 400 to improve the energy density of the battery.

[0165] In some embodiments, the ratio of the thickness of the current collecting member 100 to the length of the battery may be 0.0025-0.05, thereby avoiding the problem of insufficient strength and / or insufficient current flow capacity due to the current collecting member 100 being too thin.

[0166] 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 .

[0167] For example, please continue to refer to Fig.19 , Fig.19 for Fig.18 Schematic diagram of the size parameters of the current collector of the battery shown. When the pole lug segment 112 includes the pole lug connection structure 1121, the thickness direction H2 of the pole lug segment 112 is perpendicular to the height direction of the battery. Then, 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.

[0168] 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 .

[0169] 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 .

[0170] In some embodiments, h2+h1 / 2 is 25-100 mm. For example, h2+h1 / 2 is 25 mm, 29 mm, 30 mm, 34.1 mm, 42.4 mm, 50 mm, 51.7 mm, 55 mm, 62.7 mm, 65.55 mm, 72 mm, 80.43 mm, 85 mm, 90 mm, 91.4 mm, 94.5 mm, 95 mm or 100 mm, which is not limited in the embodiments of the present application.

[0171] Furthermore, on the one hand, the tab segment 112 can be prevented from being too short, so that the tab connection structure 1121 of the tab segment 112 can have more area to be welded to the tab 51, so as to improve the reliability of welding between the tab segment 112 and the tab 51. On the other hand, the tab segment 112 can be prevented from being too long, so that the resistance from the tab connection structure 1121 to the pole column connection structure 1111 is too large, so as to improve the performance of the current collector 100 and the battery.

[0172] The above are some examples of batteries according to the embodiments of the present application.

[0173] An embodiment of the present application also provides an electrical device, which may include the battery as described above.

[0174] 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, and the like. Smart wearable devices include, but are not limited to, smart watches, smart bracelets, cervical massagers, and the like. Mobile terminals include, but are not limited to, smart phones, laptops, tablet computers, and POS (point of sales terminal). Household appliances include, but are not limited to, televisions, washing machines, air conditioners, rice cookers, smart sweepers, smart lights, and the like. Medical devices include, but are not limited to, infrared electronic thermometers, pulse oximeters, human body composition analyzers, and the like.

[0175] 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 and a pole lug section connected by bending, the pole section being used for being electrically connected to the pole, and the pole lug section being used for being electrically connected to the pole lug; and, A reinforcing portion, wherein the reinforcing portion is at least partially disposed on a side surface of the pole segment in a thickness direction, and the reinforcing portion is at least partially disposed on a side surface of the pole lug segment in a thickness direction.

2. The current collecting member according to claim 1, characterized in that: The pole section is provided with a pole connection structure for electrically connecting to the pole, and the pole tab section is provided with a pole tab connection structure for electrically connecting to the pole tab; Wherein, the reinforcement portion extends from the pole connection structure through the bent connection portion between the pole segment and the pole lug segment to the pole lug connection structure.

3. The current collecting member according to claim 2, characterized in that: The reinforcing portion is made of a conductive material, and includes a first reinforcing portion and a second reinforcing portion that are connected by bending, the first reinforcing portion is electrically connected to the pole segment, and the second reinforcing portion is electrically connected to the pole lug segment.

4. The current collecting member according to claim 2, characterized in that: The reinforcing part is made of a conductive material, and a portion of the reinforcing part located between the pole connection structure and the pole ear connection structure is attached to the current collecting member body.

5. The current collecting member according to claim 1, characterized in that: The pole segment includes a pole mounting hole, the pole mounting hole is used to mount the pole to be electrically connected to 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.

6. The current collecting member according to claim 1, 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, one side surface of the pole tab segment body in the thickness direction includes a first area and a second area, the reinforcement portion is partially attached to the first area, and the pole tab connection structure can be bent to be attached to the second area.

7. The current collecting member according to claim 1, 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, along the width direction of the current collector body, the ratio of the width of the pole lug segment main body to the pole column segment is 0.8-1.

2.

8. The current collecting member according to any one of claims 1 to 7, characterized in that: At least one side edge of the current collecting body in the width direction is connected to the reinforcing portion by bending, so that the reinforcing portion is attached to at least one side surface of the current collecting body in the thickness direction.

9. The current collecting member according to claim 8, 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 part and a second part, the first part and the second part are arranged opposite to each other along the width direction of the current collecting body, the first part is connected to the first side bend, the second part is connected to the second side bend, and the first part and the second part are located on the same side surface of the current collecting body in the thickness direction.

10. The current collecting member according to claim 9, characterized in that: The first portion and the second portion are spaced apart along a width direction of the current collecting member body, and a gap between the first portion and the second portion is greater than or equal to 0.2 mm.

11. The current collecting member according to claim 9, characterized in that: When the pole lug segment includes a pole lug segment main body and a pole lug connection structure, the number of the pole lug connection structure is at least one, at least one of the first side and the second side is connected to the pole lug connection structure, and the ratio of the width of the pole lug connection structure to the first part or the second part connected to the same side of the current collector body is 0.8-1.

2.

12. The current collecting member according to claim 9, 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 part and the second part.

13. The current collecting member according to claim 8, 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 third part, which is connected to one of the first side and the second side by a bend on one side along the width direction of the current collecting body, and is 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.

14. The current collecting member according to claim 8, characterized in that: The reinforcing portion includes a connected connecting side and a free side, the connecting side is connected to one side edge of the current collecting body in the width direction, the free side is arranged adjacent to one side edge of the current collecting body in the length direction, and the free side is provided with a space avoidance structure, and the space avoidance structure is retracted into one side edge of the current collecting body adjacent to the space avoidance structure.

15. The current collecting member according to claim 14, characterized in that: The free side includes a first free side, the first free side is arranged adjacent to an edge of a side of the pole segment away from the pole lug segment, and the air avoidance structure includes a first air avoidance structure arranged on the first free side; and / or The free side includes a second free side, the second free side is arranged adjacent to a side edge of the pole lug segment away from the pole column segment, and the air avoidance structure includes a second air avoidance structure arranged on the second free side.

16. The current collecting member according to claim 8, characterized in that: The reinforcing portion includes a connected connecting side and a free side, the connecting side is connected to one side edge of the current collecting component body in the width direction, and the free side is arranged adjacent to one side edge of the current collecting component body in the length direction to form an end of the current collecting component along the length direction, and the current collecting component is provided with a gap at at least one corner of the end of the free side.

17. The current collecting member according to claim 8, characterized in that: The outer side of the connection between the current collecting member body and the reinforcement part is a curved surface structure.

18. The current collecting member according to any one of claims 1 to 7, characterized in that: The current collector body also includes a holding section, which is connected to one end of the pole ear section away from the pole column section, and the holding section is protrudingly connected to a side of the pole ear section away from the core package, so as to be clamped and fixed by an external instrument; Wherein, the reinforcement portion further includes a third reinforcement portion, and the third reinforcement portion is arranged on at least one side surface of the holding section in the thickness direction.

19. The current collecting member according to claim 18, characterized in that: The third reinforcement 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 a second air avoidance structure is provided at one end of the second free side away from the connecting side, and the second air avoidance structure is retracted at a side edge of the retaining section away from the pole lug section.

20. The current collecting member according to claim 18, characterized in that: The third reinforcement portion extends from an end of the retaining segment away from the pole lug segment to a point where the retaining segment is bent and connected to the pole lug segment.

21. A top cover assembly, characterized in that: include: Cover body; The current collecting member according to any one of claims 1 to 20, 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.

22. The top cover assembly according to claim 21, 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.

23. 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 21 or 22, the cover body is connected and fixed to the shell to close the installation cavity, and the pole ear segment is electrically connected to the pole ear.

24. The battery according to claim 23, characterized in that Along the width direction of the current collecting member body, a ratio of the width of the current collecting member body to the width of the shell is less than or equal to 0.

9.

25. The battery according to claim 23, characterized in that The thickness direction of the pole lug segment is the same as the length direction of the battery, and the ratio of the thickness of the current collector to the length of the battery is 0.0025-0.

05.

26. The battery according to claim 23, characterized in that When the tab segment includes a tab connection structure, the thickness direction of the tab segment is perpendicular to the height direction of the battery, along the height direction of the battery, the total height of the battery is H, the total height of the tab connection structure is h1, and the distance between the tab connection structure and the pole segment is h2; wherein, h2≤(H-5) / 2-h1; and / or, h2+h1 / 2 is 25-100 mm.

27. An electrical equipment, characterized in that: Comprising a battery as claimed in any one of claims 23 to 26.

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