Connecting piece structure and battery

Abstract

The utility model provides a connecting piece structure and a battery. The connecting piece structure comprises a pole connecting part, a first tab connecting part and a second tab connecting part, the pole connecting part is used for being connected with a pole; the first tab connecting part is connected with the pole connecting part, and the first tab connecting part is used for connecting a first tab of a core package; the second tab connecting part is connected with the pole connecting part, and the second tab connecting part is used for connecting a first tab of another core package. The utility model aims to solve the technical problems of complex connection, low core package utilization rate and long overcurrent line of the existing double-layer core package.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a connecting piece structure and a battery. Background Art

[0002] In the prior art, during battery assembly, the battery tabs must first be welded to the core pack, followed by the connector tabs. The positive and negative tabs of the core pack are then welded to the positive and negative tabs of the connector tabs, respectively. In a double-layer core pack, additional structure is required to connect the two core packs, resulting in low core pack volume utilization, complex structure, and increased current flow paths. Utility Model Content

[0003] The embodiments of the present utility model provide a connecting piece structure and a battery, which can improve the technical problems of the existing double-layer core package, such as complex connection, low core package utilization, and long overcurrent circuit.

[0004] In a first aspect, an embodiment of the present invention provides a connecting piece structure, comprising:

[0005] A pole connecting portion, used for connecting to a pole;

[0006] A first tab connection portion is connected to the pole connection portion, and the first tab connection portion is used to connect a first tab of a core package; and

[0007] The second tab connection portion is connected to the pole connection portion, and the second tab connection portion is used to connect to the first tab of another core package.

[0008] In one embodiment, the first tab connection portion includes a first supporting segment and a first bent segment, the first supporting segment is connected to the pole connection portion, and the first bent segment is arranged at a preset angle to the plane where the first supporting segment is located; and / or,

[0009] The second tab connection portion includes a second supporting segment and a second curved segment. The second supporting segment is connected to the pole connection portion. The second curved segment is arranged at a preset angle to the plane where the second supporting segment is located.

[0010] In one embodiment, the first tab connection portion includes a first supporting segment and a first curved segment, and a projection of the first curved segment on the first supporting segment partially overlaps with the first supporting segment; and / or,

[0011] The second tab connecting portion includes a second supporting segment and a second curved segment, and a projection of the second curved segment on the second supporting segment partially overlaps with the second supporting segment.

[0012] In one embodiment, the first tab connection portion includes a first supporting segment, the second tab connection portion includes a second supporting segment, and the first supporting segment, the second supporting segment, and the tab connection portion are located in the same plane.

[0013] In one embodiment, the first supporting section and the second supporting section are located on the same side of the pole connecting portion.

[0014] In one embodiment, the first tab connection portion includes a first curved segment, and the second tab connection portion includes a second curved segment;

[0015] The first curved section is provided on a side of the first supporting section close to the second supporting section, and the curved section is provided on a side of the second supporting section close to the first supporting section. A distance difference is provided between the first curved section and the second curved section.

[0016] In one embodiment, an angle between the first supporting section and the first bending section is θ, wherein 0°<θ≤180°.

[0017] In one embodiment, the first tab connection portion includes a first supporting segment and a first curved segment, the first supporting segment has a width of L1, the first curved segment has a width of L2, L2 / L1=(0.7-1):1; and / or,

[0018] The second tab connecting portion includes a second supporting segment and a second curved segment. The width of the second supporting segment is L3, the width of the second curved segment is L4, and L4 / L3=(0.7-1):1.

[0019] In one embodiment, the pole connecting portion includes a main body portion and a sub-connecting portion, the main body portion is connected to the first pole tab connecting portion and the second pole tab connecting portion, the sub-connecting portion is connected to a side of the main body portion away from the first pole tab connecting portion, and the width of the sub-connecting portion is smaller than the width of the main body portion.

[0020] In one embodiment, the thickness of the pole connection portion is H1, 0.3 mm

[0021] The thickness of the second tab connection portion is H3, 0.3 mm <H3≤1.5mm。

[0022] In a second aspect, an embodiment of the present invention provides a battery, comprising:

[0023] Two core packs are arranged side by side, each of the core packs includes a first electrode tab and a second electrode tab, and the first electrode tab and the second electrode tab are located on the same side;

[0024] ​Cover plate with pole

[0025] The two connecting piece structures as described above are connected to the two core packages and the cover plate.

[0026] In one embodiment, the first tab connection portion includes a first supporting segment and a first bent segment, and the first supporting segment, the first tab, and the first bent segment are welded together; and / or,

[0027] The second tab connecting portion includes a second supporting segment and a second bent segment, and the second supporting segment, the second tab and the second bent segment are welded together.

[0028] In one embodiment, the first tab connection portion includes a first supporting segment and a first curved segment, and the sum of the widths of the first supporting segment and the first curved segment is equal to the width of the core package; and / or,

[0029] The second tab connecting portion includes a second supporting segment and a second curved segment, and the sum of the widths of the two supporting segments and the second curved segment is equal to the width of the core package.

[0030] Beneficial effects of the embodiments of the present utility model:

[0031] The connecting piece structure provided by the present invention has a simple structure, a simple manufacturing process, and is easy to install. The first tab connecting portion is used to connect to the first tab of any core pack, and the second tab connecting portion is used to connect to the first tab of another core pack. The first tabs of two battery cells are connected by a single connecting piece structure without the need for additional structures for connection. This saves material, shortens the current path, improves the utilization rate of the core pack, and saves material. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0033] Figure 1 This is a structural schematic diagram of an embodiment of the connecting piece structure (in an unbent state) provided by the present invention;

[0034] Figure 2 This is a structural schematic diagram of an embodiment of the connecting piece structure (in a bent state) provided by the present invention;

[0035] Figure 3 yes Figure 2 The main view;

[0036] Figure 4 This is a schematic structural diagram of an embodiment of a battery provided by the present utility model;

[0037] Figure 5 yes Figure 4 Main view of the middle battery;

[0038] Figure 6 yes Figure 4 A schematic structural diagram of another embodiment of the battery;

[0039] Figure 7 yes Figure 4 A schematic structural diagram of another embodiment of a battery.

[0040] Explanation of Figure Numbers

[0041] Label name Label name 100 Connector structure 107 Second bend 101 Pole connection 108 Body part 102 First tab connection portion 109 Sub-connection 103 Second tab connection portion 200 Core package 104 First support section 201 First tab 105 First bend 202 Second tab 106 Second support section DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", 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.

[0043] In the prior art, during battery assembly, the battery tabs must first be welded to the core pack, followed by the connector tabs. The positive and negative tabs of the core pack are then welded to the positive and negative tabs of the connector tabs, respectively. In a double-layer core pack, additional structure is required to connect the two core packs, resulting in low core pack volume utilization, complex structure, and increased current flow paths.

[0044] In view of this, the present invention proposes a connecting piece structure 100. Figures 1 to 3 The following is a schematic diagram of an embodiment of a connecting plate structure 100 provided by the present invention. The connecting plate structure 100 provided by the present invention is simple in structure, easy to install, can save materials, and shorten the flow path. The connecting plate structure 100 will be described in detail below with reference to the main figures.

[0045] See also Figure 1、 Figure 2 and Figure 3 The connecting piece structure 100 includes a pole connecting portion 101, a first tab connecting portion 102, and a second tab connecting portion 103. The pole connecting portion 101 is used to connect to the pole; the first tab connecting portion 102 is connected to the pole connecting portion 101 and is used to connect to the first tab 201 of one core pack 200; the second tab connecting portion 103 is connected to the pole connecting portion 101 and is used to connect to the first tab 201 of another core pack 200.

[0046] The connecting piece structure 100 provided by the present invention has a simple structure, a simple manufacturing process, and is easy to install. The first tab connecting portion 102 is used to connect to the first tab 201 of any core pack 200, and the second tab connecting portion 103 is used to connect to the first tab 201 of another core pack 200. Connecting the first tabs 201 of two battery cells through a single connecting piece structure 100 eliminates the need for additional structures for connection, saving material while also shortening the current path, improving the utilization rate of the core pack 200, and saving material.

[0047] The connecting piece structure 100 provided in this embodiment is used to connect two core packages 200. Specifically, each core package 200 includes a first electrode tab 201 and a second electrode tab 202. The first electrode tab 201 and the second electrode tab 202 are located on the same side and have opposite polarities. Two connecting piece structures 100 are provided, one connecting piece structure 100 connects the two first electrode tabs 201, and the other connecting piece structure 100 connects the two second electrode tabs 202.

[0048] It should be noted that, in order to ensure the connection strength, the first tab connection portion 102 is welded to the first tab 201, and the second tab connection portion 103 is welded to the other first tab 201. During the welding process, ultrasonic welding is often used. However, due to the particularity of the ultrasonic welding process, the first tab 201 may be pulled during the welding process, causing the first tab 201 to deform or tear. In order to avoid the above situation, in this embodiment, please refer to Figure 1 、 Figure 2 and Figure 3The first tab connection portion 102 includes a first support segment 104 and a first bent segment 105. The first support segment 104 is connected to the pole connection portion 101. The first bent segment 105 is arranged at a preset angle to the plane in which the first support segment 104 lies. A first space is formed between the first bent segment 105 and the first support segment 104. The first tab 201 is disposed in the first space. The first bent segment 105 and the first support segment 104 are located on either side of the first tab 201. During the welding process, the first support segment 104 is located on one side of the first tab 201, and the first bent segment 105 is located on the other side of the first tab 201. The first support segment 104 and the first bent segment 105 protect the first tab 201 from being torn during the welding process, thereby improving the connection strength between the connecting piece structure 100 and the core package 200.

[0049] Further, see Figure 2 and Figure 3 The projection of the first curved section 105 on the first supporting section 104 partially overlaps with the first supporting section 104. It should be noted that during the welding process, the first curved section 105 only needs to cover the first electrode tab 201. However, considering space utilization, welding effect, connection strength, etc., as a preferred embodiment, the first curved section 105 completely covers the first electrode tab 201, that is, the first curved section 105 and the first supporting section 104 are arranged in a superimposed and parallel state. Specifically, during actual operation, the first supporting section 104 and the first bending section 105 are in the same horizontal plane. The first pole ear 201 is first placed on the first supporting section 104, and then the first bending section 105 is bent so that the first bending section 105 covers the first pole ear 201. At this time, the first supporting section 104 and the first bending section 105 clamp the first pole ear 201 therebetween. Such a setting can not only protect the first pole ear 201 well and prevent the first pole ear 201 from tearing during welding; it can also achieve pre-fixation through the clamping of the first supporting section 104 and the first bending section 105 to prevent the first pole ear 201 from being offset during welding, which may cause the first earphone to tear.

[0050] Likewise, in some embodiments, see FIG. Figure 2 and Figure 3The second tab connection portion 103 includes a second support segment 106 and a second curved segment 107. The second support segment 106 is connected to the pole connection portion 101, and the second curved segment 107 is arranged at a preset angle to the plane in which the second support segment 106 lies. Specifically, a second space is formed between the second support segment 106 and the second curved segment 107. The first tab 201 of the other core package 200 is located within the second space, so that the second support segment 106 and the second curved segment 107 are located on either side of the first tab 201 of the other core package 200. During the welding process, the second support segment 106 is located on one side of the first tab 201 of the other core package 200, and the second curved segment 107 is located on the other side of the first tab 201 of the other core package 200. The second curved segment 107 and the second support segment 106 protect the first tab 201 of the other core package 200, preventing the first tab 201 of the other core package 200 from tearing during the welding process, thereby improving the connection strength between the connecting piece structure 100 and the core package 200.

[0051] Further, please refer to Figure Figure 2 and Figure 3 In some embodiments, the second tab connection portion 103 includes a second support segment 106 and a second curved segment 107, and the projection of the second curved segment 107 on the second support segment 106 partially overlaps with the second support segment 106. It should be noted that during the welding process, the second curved segment 107 only needs to cover the second tab 202. However, considering space utilization, welding effect, connection strength, etc., as a preferred embodiment, the second curved segment 107 completely covers the first tab 201, that is, the second curved segment 107 and the second support segment 106 are in a relatively horizontal state. Specifically, during actual operation, the second supporting section 106 and the second bending section 107 are in the same horizontal plane. The first pole ear 201 of the other core package 200 is first placed on the second supporting section 106, and then the second bending section 107 is bent so that the second bending section 107 covers the first pole ear 201 of the other core package 200. At this time, the second supporting section 106 and the second bending section 107 clamp the first pole ear 201 of the other core package 200 therebetween. Such a setting can not only well protect the first pole ear 201 of the other core package 200 and avoid the first pole ear 201 of the other core package 200 from tearing during welding; it can also achieve pre-fixation through the clamping effect of the second supporting section 106 and the second bending section 107 to avoid the first pole ear 201 of the other core package 200 being offset during welding, resulting in the first earphone of the other core package 200 being torn.

[0052] In some embodiments, see FIG. Figure 2 and Figure 3The tab connection portion is used to connect to the tab on the cover plate. To improve space utilization, the cover plate tab and the first tab 201 are located on the same end surface. This allows the first support segment 104, the second support segment 106, and the tab connection portion to be coplanar. Furthermore, when the tab connection portion and the first support segment 104 are coplanar, the tab connection portion does not need to be bent, thereby improving the structural strength of the connecting piece structure 100.

[0053] It should be noted that the specific positions of the first support segment 104 and the second support segment 106 are not limited. Furthermore, the tab connection portion has a first and second side disposed oppositely, and a third and fourth side disposed oppositely, wherein the third and fourth sides are located between the first and second sides. For example, in some embodiments, the first tabs 201 of the two core packs 200 are located in the same position, and both first tabs 201 are located near the third side. To improve space utilization, the first support segment 104 and the second support segment 106 are located on the same side of the pole connection portion 101. Specifically, the first support segment 104 and the second support segment 106 are connected to the second side, with a gap between them. This arrangement can improve space utilization and also facilitate welding operations. In another embodiment, the first tabs 201 of the two core packs 200 are staggered, with one first tab 201 located near the third side and the other first tab 201 located near the fourth side. To facilitate welding, the first support segment 104 is located on the third side and the second support segment 106 is located on the fourth side.

[0054] Further, please refer to Figure Figure 2 and Figure 3 The connection method between the first curved section 105 and the second curved section 107 is not limited. Furthermore, the first support section 104 has a first and second side arranged oppositely, and a third and fourth side arranged oppositely, with the third and fourth sides located between the first and second sides. The second support section 106 has a fifth and sixth side arranged oppositely, and a seventh and eighth side arranged oppositely, with the seventh and eighth sides located between the fifth and sixth sides. Specifically, one of the first tabs 201 is positioned adjacent to the fourth side, and the other first tab 201 is positioned adjacent to the seventh side. In one embodiment, the first curved section 105 is connected to the third side, and the second curved section 107 is connected to the seventh side. This arrangement improves space utilization and saves space. In another embodiment, the first curved section 105 is connected to the second side, and the second curved section 107 is connected to the fifth side. This arrangement prevents interference between the first and second curved sections, making the bending process more convenient and efficient.

[0055] It should be noted that when the first bending section 105 is set on the side of the first support section 104 close to the second support section 106, and the bending section is set on the side of the second support section 106 close to the first support section 104, there is a distance difference between the first bending section 105 and the second bending section 107. The purpose of setting the distance difference is to avoid mutual interference between the first bending section 105 and the second bending section 107, so as to facilitate the operator to perform bending processing.

[0056] In some embodiments, see FIG. Figure 2 and Figure 3 The angle between the first support section 104 and the first curved section 105 is θ, where 0°<θ≤180°. When θ is less than 0°, the space between the first support section 104 and the first curved section 105 is too small to clamp and secure the first pole tab 201. When θ is greater than 180°, the first support section 104 and the first curved section 105 are on the same horizontal plane, and the first curved section 105 is located on the side of the first support section 104 facing away from the first pole tab 201. That is, the first curved section 105 cannot protect the first pole tab 201, and the first pole tab 201 is easily torn during the welding process.

[0057] Likewise, see Figure Figure 2 and Figure 3 In another embodiment, the angle between the second support segment 106 and the second curved segment 107 is α, where 0°<α≤180°. When α is less than 0°, the space between the second support segment 106 and the second curved segment 107 is too small to clamp and secure the first electrode tab 201. When α is greater than 180°, the second support segment 106 and the second curved segment 107 are on the same horizontal plane, and the second curved segment 107 is located on the side of the second support segment 106 facing away from the first electrode tab 201. In other words, the second curved segment 107 cannot protect the first electrode tab 201, and the first electrode tab 201 is easily torn during the welding process.

[0058] In some embodiments, the width of the first support segment 104 is L1, and the width of the first curved segment 105 is L2, where L2 / L1 = (0.7-1):1. It should be noted that when the ratio of L2 to L1 is less than 0.7, the width of the first curved segment 105 is too small to fully cover the first tab 201, and the first tab 201 is susceptible to tearing during welding. When the ratio of L2 to L1 is greater than 1, the length of the first curved segment 105 is too long, increasing the space occupied.

[0059] Similarly, the width of the second support segment 106 is L3, and the width of the second curved segment 107 is L4, with L4 / L3 = (0.7-1):1. When the ratio of L4 to L3 is less than 0.7, the width of the second curved segment 107 is too small to fully cover the first tab 201, which can easily cause the first tab 201 to tear during welding. When the ratio of L4 to L3 is greater than 1, the length of the second curved segment 106 is too long, increasing the space occupied.

[0060] In some implementations, see FIG. Figure 2 and Figure 3 The pole connection portion 101 includes a main body portion 108 and a sub-connection portion 109. The main body portion 108 is connected to the first tab connection portion 102 and the second tab connection portion 103. The sub-connection portion 109 is connected to the side of the main body portion 108 away from the first tab connection portion 102, and the width of the sub-connection portion 109 is smaller than the width of the main body portion 108. It should be noted that the width of the sub-connection portion 109 is smaller than the width of the main body portion 108. While ensuring connection strength, it can save material and thus reduce costs.

[0061] In some embodiments, the thickness of the pole connection portion 101 is H1, 0.3 mm

[0062] ​In some embodiments, the thickness of the first tab connecting portion 102 is H2, where 0.3 mm < H2 ≤ 1.5 mm; the thickness of the second tab connecting portion 103 is H3, where 0.3 mm < H3 ≤ 1.5 mm. It should be noted that when the thicknesses of the first tab connecting portion 102 and the second tab connecting portion 103 are relatively large, during the welding process, the welding ability cannot penetrate smoothly, resulting in an increase in welding difficulty. When the thicknesses of the first tab connecting portion 102 and the second tab connecting portion 103 are relatively small, the connection strength between the connecting piece structure 100 and the first tab 201 is reduced. Specifically, H2 can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.72 mm, 0.8 mm, 0.88 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm or other data not listed. More specifically, H3 can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.72 mm, 0.8 mm, 0.88 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm or other data not listed.

[0063] The present utility model also provides a battery. Figures 4 to 7 FIG. is a schematic structural diagram of an embodiment of the battery provided by the present utility model; the battery includes a connecting piece structure 100. For the specific structure of the connecting piece structure 100, refer to the above embodiments. Since this battery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0064] Further, please refer to Figure 4 , the battery further includes two core packages 200 and a cover plate. The two core packages 200 are arranged side by side. Each core package 200 includes a first tab 201 and a second tab 202. The first tab 201 and the second tab 202 are located on the same side surface, and the first tab 201 and the second tab 202 are arranged at intervals; the first tab connecting portion 102 and the second tab connecting portion 103 of one of the connecting piece structures 100 connect the first tabs 201 on the two core packages 200, and the first tab connecting portion 102 and the second tab connecting portion 103 of the other connecting piece structure 100 connect the second tabs 202 on the two core packages 200. Two pole columns are provided on the cover plate, and the two pole columns are respectively connected to the pole column connecting portions 101 on the two connecting piece structures 100.

[0065] Even further, in some embodiments, a first mounting hole is formed on the pole column connecting portion 101, and the tab is clamped in the first mounting hole.

[0066] In some embodiments, the first support segment 104, the first tab 201, and the first bent segment 105 are welded. It is understood that after the first bent portion is bent to the first tab 201, the first tab 201 is ultrasonically welded to the first support segment 104. The energy generated by the ultrasonic wave simultaneously welds the first bent portion to the first tab 201, which not only does not affect the structural strength of the connecting piece structure 100 but also improves installation efficiency.

[0067] Similarly, the second tab connection portion 103 includes a second support segment 106 and a second bent segment 107. The second support segment 106, the second tab 202, and the second bent segment 107 are welded together. After the second bent segment is bent to the first tab 201 of the other core package 200, the first tab 201 of the other core package 200 is ultrasonically welded to the second support segment 106. The energy generated by the ultrasonic wave simultaneously welds the second bent segment to the first tab 201 of the other core package 200. This not only does not affect the structural strength of the connecting plate structure 100, but also improves installation efficiency.

[0068] In some embodiments, the first tab connection portion 102 includes a first support segment 104 and a first bent segment 105, and the sum of the widths of the first support segment 104 and the first bent segment 105 is equal to the width of the core package 200; such a setting can improve space utilization, so that there is no gap between the two core packages 200, and at the same time can save materials and costs.

[0069] Similarly, the second tab connection portion 103 includes a second support segment 106 and a second curved segment 107. The sum of the widths of the second support segment 106 and the second curved segment 107 is equal to the width of the core package 200. This arrangement can improve space utilization, eliminating gaps between the two core packages 200, while also saving materials and costs.

[0070] In addition, the present application also provides a connection method of the connecting sheet structure 100, the specific operations are as follows:

[0071] See also Figure 5 、 Figure 6 and Figure 7The two core packages 200 are spaced apart so that the sides of the two core packages 200 with the first electrode tabs 201 face each other. The connecting sheet structure 100 is placed between the two core packages 200, so that the first electrode tab 201 of one core package 200 is on the first support section 104 and the first electrode tab 201 of the other core package 200 is on the second support section 106. The first curved section 105 and the second curved section 107 are bent so that they cover the two second electrode tabs 202. The first support section 104, the first electrode tab 201, and the first curved section 105 are ultrasonically welded together. The second support section 106, the second electrode tab 202, and the second curved section 107 are also welded together. The two first electrode tabs 201 are then bent together so that the two core packages 200 are arranged side by side, completing the connection of the connecting sheet structure 100. This arrangement improves space utilization and ensures the connection strength of the connecting sheet structure 100.

[0072] 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 those skilled in the art, based on the idea of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A connecting piece structure, characterized in that: Comprising: A pole connection part for connecting with a pole; A first tab connection part connected to the pole connection part, the first tab connection part being used for connecting the first tab of one core package; and, A second tab connection part connected to the pole connection part, the second tab connection part being used for connecting the first tab of another core package.

2. The connecting piece structure according to claim 1, characterized in that: The first tab connection part includes a first support section and a first bending section, the first support section is connected to the pole connection part, and the first bending section is arranged at a preset angle with respect to the plane where the first support section is located; and / or, The second tab connection part includes a second support section and a second bending section, the second support section is connected to the pole connection part, and the second bending section is arranged at a preset angle with respect to the plane where the second support section is located.

3. The connecting piece structure according to claim 1, characterized in that: The first tab connection part includes a first support section and a first bending section, and the projection of the first bending section on the first support section partially overlaps with the first support section; and / or, The second tab connection part includes a second support section and a second bending section, and the projection of the second bending section on the second support section partially overlaps with the second support section.

4. The connecting piece structure according to claim 1, characterized in that: The first tab connection part includes a first support section, the second tab connection part includes a second support section, and the first support section, the second support section and the tab connection part are located in the same plane.

5. The connecting piece structure according to claim 4, characterized in that: The first support section and the second support section are located on the same side of the pole connection part.

6. The connecting piece structure according to claim 4, characterized in that: The first tab connection part includes a first bending section, and the second tab connection part includes a second bending section; The first bending section is arranged on the side of the first support section close to the second support section, the bending section is arranged on the side of the second support section close to the first support section, and there is a distance difference between the first bending section and the second bending section.

7. The connecting piece structure according to claim 6, characterized in that: The included angle between the first support section and the first bending section is θ, where 0° < θ ≤ 180°.

8. The connecting piece structure according to claim 1, characterized in that: The first tab connection part includes a first support section and a first bending section, the width of the first support section is L1, the width of the first bending section is L2, and L2 / L1 = (0.7 - 1):1; and / or, The second tab connection part includes a second support section and a second bending section, the width of the second support section is L3, the width of the second bending section is L4, and L4 / L3 = (0.7 - 1):

1.

9. The connecting piece structure according to any one of claims 1 to 8, characterized in that: The pole connection part includes a main body part and a sub-connection part, the main body part is connected to the first tab connection part and the second tab connection part, the sub-connection part is connected to the side of the main body part far from the first tab connection part, and the width of the sub-connection part is smaller than the width of the main body part.

10. The connecting piece structure according to any one of claims 1 to 8, characterized in that: The thickness of the pole connection part is H1, 0.3mm < H1 ≤ 1.5mm; and / or, The thickness of the first tab connection part is H2, 0.3mm < H2 ≤ 1.5mm; and / or, The thickness of the second tab connection part is H3, 0.3mm < H3 ≤ 1.5mm.

11. A battery, characterized in that: Comprising: Two core packages arranged side by side, each core package includes a first tab and a second tab, and the first tab and the second tab are located on the same side; A cover plate provided with a pole Two connecting piece structures according to claim 1 are connected to the two core packages and the cover plate.

12. The battery according to claim 11, characterized in that The first tab connection portion includes a first supporting section and a first bending section, and the first supporting section, the first tab and the first bending section are welded; and / or, The second tab connecting portion includes a second supporting segment and a second bent segment, and the second supporting segment, the second tab and the second bent segment are welded together.

13. The battery according to claim 11, characterized in that The first tab connecting portion includes a first supporting section and a first curved section, and the sum of the widths of the first supporting section and the first curved section is equal to the width of the core package; and / or, The second tab connecting portion includes a second supporting segment and a second curved segment, and the sum of the widths of the second supporting segment and the second curved segment is equal to the width of the core package.

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