Connecting assembly and battery
By designing the staggered connection components, they are directly welded to the pole ear, which avoids bending and pulling forces, and solves the problems of pole ear breakage and core pack damage in battery assembly, improving the safety and production efficiency of the battery.
Patent Information
- Application Number
- CN202420074180.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-11
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-01-11
AI Technical Summary
During the battery assembly process, the extreme ears are prone to break during bending of the connecting piece, and a pulling force is generated to the core bag, causing damage to the core bag.
A connecting assembly is designed, including a first connecting piece and a second connecting piece, through the staggered arrangement of the first main body plate and the connecting piece, avoid bending action, directly weld with the pole ear, reduce pulling force, and arrange through grooves Avoid welding torches and simplify the welding process.
It effectively avoids breakage of the connecting plate and damage to the core package, improves battery safety, simplifies manufacturing processes, reduces production steps, and improves production efficiency.
Smart Images
Figure CN222355367U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a connection component and a battery. Background Art
[0002] In the related art, during the battery assembly process, it is necessary to first weld the battery tabs to the core pack, and then weld the connecting piece to the core pack. The positive tab of the core pack and the negative tab of the core pack are respectively welded to the positive electrode sheet and the negative electrode sheet of the connecting piece. During the welding process of the double-layer core pack, the tabs are prone to breakage due to the outward expansion of the connecting piece and the outward bending process, and the bending process will generate a pulling force on the core pack, causing damage to the core pack. Utility Model Content
[0003] The embodiments of the utility model provide a connection assembly and a battery, which can improve the technical problems that the existing connection assembly is easy to break during the bending process and will pull the core package and cause damage to the core package.
[0004] In a first aspect, an embodiment of the utility model provides a connection assembly for connecting two adjacent core packages, the connection assembly comprising a first connection sheet, the first connection sheet comprising:
[0005] A first top cover connecting portion, used to connect a first pole of the top cover assembly; and
[0006] The first pole ear connection portion includes a first main body plate, a first connecting plate and a second connecting plate, wherein the first main body plate is used to be arranged between two adjacent core packages, one end of the first main body plate is connected to the first top cover connection portion, the first connecting plate and the second connecting plate are bently connected to one side of the first main body plate and are arranged away from each other, the first connecting plate is used to be connected to the first pole ear of one of the core packages, and the second connecting plate is used to be connected to the first pole ear of the other core package.
[0007] In one embodiment, in the extension direction of the one side of the first main body plate, the first connecting plate and the second connecting plate are staggered.
[0008] In one embodiment, the first main body plate comprises a first plate, a second plate and a third plate, one end of the first main body plate is connected to the top cover connecting portion, the second plate and the third plate are connected to one side of the first plate, and a groove is provided between the one side of the first plate and the second plate and the third plate;
[0009] The first connecting plate is connected to a side of the second plate away from the first plate in a bending manner, and the second connecting plate is connected to a side of the third plate away from the first plate in a bending manner.
[0010] In one embodiment, in the extension direction of the one side of the first plate, the width of the groove is 5-15 mm, the width of the second plate is 30-50 mm, and the width of the third plate is 30-50 mm; and / or,
[0011] The first top cover connection portion and the first tab connection portion are integrally formed; and / or,
[0012] The first connecting plate is connected to the first pole tab of one of the core packages by laser welding, and the second connecting plate is connected to the first pole tab of the other core package by laser welding.
[0013] In one embodiment, a second connecting piece is further included, wherein the second connecting piece includes:
[0014] A second top cover connecting portion is used to connect the second pole of the top cover; and a second pole ear connecting portion includes a second main body plate, a third connecting plate and a fourth connecting plate, the second main body plate is used to be arranged between two adjacent core packages, one end of the second main body plate is connected to the second top cover connecting portion, the third connecting plate and the fourth connecting plate are bent and connected to a side of the second main body plate away from the first main body plate and are arranged away from each other, the third connecting plate is used to connect to the second pole ear of one of the core packages, and the fourth connecting plate is used to connect to the second pole ear of the other core package.
[0015] In one embodiment, the thickness of the first connecting plate is H1, and the thickness of the second connecting plate is H2, wherein 0.5 mm ≤ H1 ≤ 2.5 mm, 0.5 mm ≤ H2 ≤ 2.0 mm; and / or,
[0016] The thickness of the third connecting plate is H3, and the thickness of the fourth connecting plate is H4, wherein 0.5 mm ≤ H3 ≤ 2.5 mm, 0.5 mm ≤ H4 ≤ 2.0 mm; and / or,
[0017] The second top cover connecting portion and the second tab connecting portion are integrally formed; and / or,
[0018] The third connecting plate is connected to the second pole tab of one of the core packages by laser welding, and the fourth connecting plate is connected to the second pole tab of the other core package by laser welding.
[0019] In one embodiment, the top cover connecting portion includes a base plate and an extension plate, the base plate is bently connected to the one end of the first main body plate, the extension plate is bently connected to the one end of the base plate away from the first main body plate, the extension plate is located on the base plate and arranged opposite to the base plate, and is used to connect to the first pole of the top cover.
[0020] In a second aspect, an embodiment of the utility model provides a battery, comprising a connection assembly, two adjacent core packs and a top cover assembly, wherein the connection assembly comprises a first connection sheet, and the first connection sheet comprises:
[0021] A first top cover connecting portion, used to connect a first pole of the top cover assembly; and
[0022] The first pole ear connection portion includes a first main body plate, a first connecting plate and a second connecting plate, wherein the first main body plate is used to be arranged between two adjacent core packages, one end of the first main body plate is connected to the first top cover connection portion, the first connecting plate and the second connecting plate are bently connected to one side of the first main body plate and are arranged away from each other, the first connecting plate is used to be connected to the first pole ear of one of the core packages, and the second connecting plate is used to be connected to the first pole ear of the other core package.
[0023] In one embodiment, the core package includes a core package body, the first pole ear extends out from one side of the core package body in a bent manner, and a receiving groove is formed between the first pole ear and the core package body, and the receiving groove is used to receive the first connecting plate or the second connecting plate.
[0024] In one embodiment, the first pole tab is welded to the first connecting plate or the second connecting plate at a pole tab welding point, the length of the pole tab welding point is L1, the width of the pole tab welding point is L2, wherein 20mm≤L1≤40mm, 5mm≤L2≤20mm.
[0025] Beneficial effects of the embodiments of the utility model:
[0026] In the technical solution of the present embodiment, the two core packs are arranged in parallel, and the first main body plate is clamped between the two core packs. The first connecting plate and the second connecting plate are bent and connected to the two sides of the first main body plate. The first connecting plate and the second connecting plate can be directly connected to the two first pole ears. There is no need to perform bending during the installation process, thereby avoiding the breakage of the first connecting plate and the second connecting plate. At the same time, since there is no need to perform bending, the first main body plate will no longer generate pulling force and will no longer cause damage to the core pack, thereby improving the safety of the battery. At the same time, the connection assembly provided by the present application has a simple structure, a simple manufacturing process, and is easy to install. Since there is no need to perform bending, the production and assembly steps are reduced, which can improve the production efficiency to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] 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.
[0028] Figure 1 It is a structural schematic diagram of an embodiment of a connection assembly provided by the utility model;
[0029] Figure 2 yes Figure 1 A front view of the first connecting piece;
[0030] Figure 3 It is a structural schematic diagram of the second connecting piece provided by the utility model;
[0031] Figure 4 It is a structural schematic diagram of the battery provided by the utility model;
[0032] Figure 5 yes Figure 4 Schematic diagram of the structure of the core package.
[0033] Description of Figure Numbers
[0034] Label name Label name 100 Connecting components 112 Second pole lug connection 101 First connecting piece 113 Second main body plate 102 First top cover connecting part 114 The third connecting plate 103 First pole lug connection portion 115 Fourth connecting plate 104 First main body plate 116 substrate 105 First connecting plate 117 Extension plate 106 Second connecting plate 200 Core Package 107 First Board 300 Top cover assembly 108 Second board 400 Receiving slot 109 Third Board 500 Tab welding 110 Grooves 1000 Battery 111 Second connecting piece DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, 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.
[0036] In the related art, during the battery assembly process, it is necessary to first weld the battery tabs to the core pack, and then weld the connecting piece to the core pack. The positive tab of the core pack and the negative tab of the core pack are respectively welded to the positive electrode sheet and the negative electrode sheet of the connecting piece. During the welding process of the double-layer core pack, the tabs are prone to breakage due to the outward expansion of the connecting piece and the outward bending process, and the bending process will generate a pulling force on the core pack, causing damage to the core pack.
[0037] In view of this, the utility model proposes a connection component. Figures 1 to 3 This is a structural schematic diagram of an embodiment of a connecting component provided by the utility model. The connecting component provided by the utility model can improve the technical problems of existing connecting components that are easy to break during bending and will pull the core package and cause damage to the core package. The connecting component will be described in detail in conjunction with the main drawings below.
[0038] See also Figure 1 The present embodiment provides a connection assembly 100, which is used to connect two adjacent core packages 200. The connection assembly 100 includes a first connection sheet 101, which includes a first top cover connection portion 102 and a first pole ear connection portion 103. The first top cover connection portion 102 is used to connect the first pole of the top cover assembly 300; the first pole ear connection portion 103 includes a first main body plate 104, a first connection plate 105 and a second connection plate 106. The first main body plate 104 is used to be arranged between the two adjacent core packages 200, one end of the first main body plate 104 is connected to the first top cover connection portion 102, the first connection plate 105 and the second connection plate 106 are bent and connected to one side of the first main body plate 104 and are arranged away from each other, the first connection plate 105 is used to connect to the first pole ear of one of the core packages 200, and the second connection plate 106 is used to connect to the first pole ear of the other core package 200.
[0039] In the technical solution of the present embodiment, the two core packs 200 are arranged in parallel, and the first main body plate 104 is clamped between the two core packs 200. The first connecting plate 105 and the second connecting plate 106 are bent and connected to the two sides of the first main body plate 104. The first connecting plate 105 and the second connecting plate 106 can be directly connected to the two first pole ears. There is no need to perform bending during the installation process, so as to avoid the first connecting plate 105 and the second connecting plate 106 from breaking. At the same time, since there is no need to perform bending, the first main body plate 104 will no longer generate pulling force and will no longer cause damage to the core pack 200, thereby improving the safety of the battery 1000. At the same time, the connection assembly 100 provided in the present application has a simple structure, a simple manufacturing process, and is easy to install. Since there is no need to perform bending, the production and assembly steps are reduced, which can improve the production efficiency to a certain extent.
[0040] Please continue reading Figure 1 and Figure 2In the extension direction of the one side of the first main body plate 104, the first connecting plate 105 and the second connecting plate 106 are staggered. The first connecting plate 105 and the second connecting plate 106 are both welded to the first tab. In order to avoid mutual influence between the first connecting plate 105 and the second connecting plate 106 during welding, Figure 1 Taking the first direction in the figure as an example, the first connecting plate 105 and the second connecting plate 106 are staggered in the first direction. Furthermore, in the present embodiment, the first connecting plate 105 is arranged close to the first top cover connecting portion 102, and the second connecting plate 106 is arranged away from the first top cover connecting portion 102, thereby avoiding mutual interference between the first connecting plate 105 and the second connecting plate 106.
[0041] For further information, see Figure 2 In order to avoid mutual interference between the first connecting plate 105 and the second connecting plate 106, the first main body plate 104 includes a first plate 107, a second plate 108 and a third plate 109, the first plate 107 has a first side and a second side arranged opposite to each other, the first connecting plate 105 and the second connecting plate 106 are arranged at intervals on the first side along the first direction, one end of the first main body plate 104 is connected to the top cover connecting portion, the second plate 108 and the third plate 109 are connected to one side of the first plate 107, and the first side of the first plate 107 is provided with a groove 110 between the second plate 108 and the third plate 109; in this embodiment, The functions of the groove 110 are to isolate the first connecting plate 105 and the second connecting plate 106, and to avoid the welding gun. In the actual welding process, the first connecting plate 105 is first welded to one of the first pole ears, and then the second connecting plate 106 is welded to the other pole ear after welding. Due to the setting of the groove 110, during the welding process, when welding the second connecting plate 106, the groove 110 provides the welding gun with sufficient avoidance space to avoid contacting the first connecting plate 105 again during welding. This setting makes the welding process simpler and there is no interference between the first connecting plate 105 and the second connecting plate 106.
[0042] More specifically, in some embodiments, the first connecting plate 105 is connected to a side of the second plate 108 away from the first plate 107 in a bent manner, and the second connecting plate 106 is connected to a side of the third plate 109 away from the first plate 107 in a bent manner.
[0043] Specifically, in some embodiments, in the extension direction of the one side of the first plate 107, the width of the groove 110 is 5-15 mm, the width of the second plate is 30-50 mm, and the width of the third plate is 30-50 mm; more specifically, the width of the groove can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, and the width of the second plate can be 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm. , 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm, 46mm, 47mm, 48mm, 49mm, 50mm; the width of the third plate can be 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm, 46mm, 47mm, 48mm, 49mm, 50mm; the width of the third plate can be 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm, 46mm, 47mm, 48mm, 49mm, 50mm.
[0044] It should be noted that, in some embodiments, the first top cover connection portion 102 and the first tab connection portion 103 are integrally formed.
[0045] It should be noted that the welding method of the first connecting plate 105 and the second connecting plate 106 is not limited. Specifically, in this embodiment, the first connecting plate 105 is connected to the first pole ear of one of the core packages 200 by laser welding, and the second connecting plate 106 is connected to the first pole ear of the other core package 200 by laser welding.
[0046] Please continue reading Figure 3The connection assembly 100 also includes a second connecting piece 111, which includes a second top cover connecting portion and a second pole ear connecting portion 112, and the second top cover connecting portion is used to connect the second pole of the top cover; the second pole ear connecting portion 112 includes a second main body plate 113, a third connecting plate 114 and a fourth connecting plate 115, and the second main body plate 113 is used to be arranged between two adjacent core packages 200, one end of the second main body plate 113 is connected to the second top cover connecting portion, the third connecting plate 114 and the fourth connecting plate 115 are bent and connected to the side of the second main body plate 113 away from the first main body plate 104 and are arranged away from each other, the third connecting plate 114 is used to connect to the second pole ear of one of the core packages 200, and the fourth connecting plate is used to connect to the second pole ear of the other core package 200. In this embodiment, the two core packs 200 are arranged in parallel, and the second main body plate 113 is clamped between the two core packs 200. The third connecting plate 114 and the fourth connecting plate 115 are bent and connected to the two sides of the second main body plate 113. The third connecting plate 114 and the fourth connecting plate 115 can be directly connected to the two second pole ears. There is no need to perform bending during the installation process, so as to avoid the breakage of the third connecting plate 114 and the fourth connecting plate 115. At the same time, since there is no need to perform bending, the second main body plate 113 will no longer generate pulling force and will no longer cause damage to the core pack 200, thereby improving the safety of the battery 1000. At the same time, the connection assembly 100 provided in the present application has a simple structure, a simple manufacturing process, and is easy to install. Since there is no need to perform bending, the production and assembly steps are reduced, which can improve the production efficiency to a certain extent.
[0047] Specifically, in some embodiments, the thickness of the first connecting plate 105 is H1, and the thickness of the second connecting plate 106 is H2, wherein 0.5 mm ≤ H1 ≤ 2.5 mm, and 0.5 mm ≤ H2 ≤ 2.0 mm; more specifically, the thickness of the first connecting plate 105 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm m, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm; the thickness of the second connecting plate 106 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm; just choose according to the actual situation.
[0048] In some embodiments, the thickness of the third connecting plate 114 is H3, and the thickness of the fourth connecting plate 115 is H4, wherein 0.5 mm ≤ H3 ≤ 2.5 mm, and 0.5 mm ≤ H4 ≤ 2.0 mm; more specifically, the thickness of the third connecting plate 114 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm; the thickness of the fourth connecting plate 115 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm; just choose according to actual situation.
[0049] Specifically, in some embodiments, the second top cover connection portion and the second tab connection portion 112 are integrally formed.
[0050] It should be noted that the welding method of the third connecting plate 114 and the fourth connecting plate 115 is not limited. Specifically, in one embodiment, the third connecting plate 114 is connected to the second pole ear of one of the core packages 200 by laser welding, and the fourth connecting plate 115 is connected to the second pole ear of the other core package 200 by laser welding.
[0051] See also Figure 1 The top cover connection part includes a base plate 116 and an extension plate 117. The base plate 116 is used to connect with the first main body plate 104. Specifically, the base plate 116 is bent and connected to the one end of the first main body plate 104. The extension plate 117 is used to connect with the base plate 116. Specifically, the extension plate 117 is bent and connected to the one end of the base plate 116 away from the first main body plate 104. In this embodiment, the extension plate 117 is located on the base plate 116 and arranged opposite to the base plate 116, and the extension plate 117 is used to connect with the first pole of the top cover. It should be noted that the purpose of the relative arrangement of the base plate 116 and the extension plate 117 is to make the extension plate 117 overlap above the base plate 116, thereby reducing the space occupied by the top cover connection part and improving the space utilization rate of the entire battery 1000. At the same time, the overlapping arrangement of the base plate 116 and the extension plate 117 can increase the strength of the top cover connection part and extend the service life of the top cover connection part.
[0052] The utility model also provides a battery 1000, see Figure 4 and Figure 5 The battery 1000 includes a connection assembly 100, two adjacent core packs 200 and a top cover assembly. The specific structure of the connection assembly 100 is referred to the above embodiment. Since the battery 1000 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 described one by one here.
[0053] Further, see 4 and Figure 5 The core package 200 includes a core package body, the first pole ear extends out from one side of the core package body in a bent manner, and a receiving groove 400 is formed between the first pole ear and the core package body, and the receiving groove 400 is used to receive the first connecting plate 105 or the second connecting plate 106. In the actual installation process, the first pole ear is welded to the core package body by ultrasonic welding. After the welding is completed, the first pole ear is bent toward the core package body until it is parallel to the side of the core package body. At this time, the first pole ear is spaced between the core package body to form the receiving groove 400. In the actual installation process, the first connecting plate 105 or the second connecting plate 106 is clamped in the receiving groove 400. After the first connecting plate 105 or the second connecting plate 106 is clamped in the receiving groove 400, the first connecting plate 105 or the second connecting plate 106 is fixed to the first pole ear by laser welding.
[0054] The second pole ear is bent and extends from the other side of the core package body, and a snap-in groove is formed between the second pole ear and the core package body, and the snap-in groove is used to accommodate the third connecting plate 114 or the fourth connecting plate 115. The connection method between the third connecting plate 114 or the fourth connecting plate 115 and the second pole ear can refer to the connection method between the first connecting plate 105 and the first pole ear. The connection methods of the two are the same and will not be repeated here.
[0055] In some embodiments, the first pole tab is welded to the first connecting plate 105 or the second connecting plate 106 at a pole tab welding point 500 , the length of the pole tab welding point 500 is L1 , the width of the pole tab welding point 500 is L2 , wherein 20 mm ≤ L1 ≤ 40 mm, 5 mm ≤ L2 ≤ 20 mm. Specifically, the length of the pole ear welding place 500 can be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, 40mm; the width of the pole ear welding place 500 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm; the length and width of the pole ear welding place 500 can be selected according to actual conditions.
[0056] 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 connection assembly, characterized in that: Used to connect two adjacent core packages, the connection assembly includes a first connection piece, and the first connection piece includes: A first top cover connecting portion, used to connect a first pole of the top cover assembly; and The first pole ear connection portion includes a first main body plate, a first connecting plate and a second connecting plate, wherein the first main body plate is used to be arranged between two adjacent core packages, one end of the first main body plate is connected to the first top cover connection portion, the first connecting plate and the second connecting plate are bently connected to one side of the first main body plate and are arranged away from each other, the first connecting plate is used to be connected to the first pole ear of one of the core packages, and the second connecting plate is used to be connected to the first pole ear of the other core package.
2. The connection assembly according to claim 1, characterized in that: In the extension direction of the one side of the first main body plate, the first connecting plate and the second connecting plate are staggered.
3. The connection assembly according to claim 1, characterized in that: The first main body plate comprises a first plate, a second plate and a third plate, one end of the first main body plate is connected to the top cover connecting portion, the second plate and the third plate are connected to one side of the first plate, and a groove is provided between the one side of the first plate and the second plate and the third plate; The first connecting plate is connected to a side of the second plate away from the first plate in a bending manner, and the second connecting plate is connected to a side of the third plate away from the first plate in a bending manner.
4. The connection assembly according to claim 3, characterized in that: In the extension direction of the one side of the first plate, the width of the groove is 5 to 15 mm, the width of the second plate is 30 to 50 mm, and the width of the third plate is 30 to 50 mm; and / or, The first top cover connection portion and the first tab connection portion are integrally formed; and / or, The first connecting plate is connected to the first pole tab of one of the core packages by laser welding, and the second connecting plate is connected to the first pole tab of the other core package by laser welding.
5. The connection assembly according to any one of claims 1 to 4, characterized in that: Also included is a second connecting piece, the second connecting piece comprising: A second top cover connecting portion, used to connect a second pole of the top cover; and The second pole ear connection part includes a second main body plate, a third connecting plate and a fourth connecting plate, the second main body plate is used to be arranged between two adjacent core packages, one end of the second main body plate is connected to the second top cover connection part, the third connecting plate and the fourth connecting plate are bently connected to the side of the second main body plate away from the first main body plate and are arranged away from each other, the third connecting plate is used to connect to the second pole ear of one of the core packages, and the fourth connecting plate is used to connect to the second pole ear of the other core package.
6. The connection assembly according to claim 5, characterized in that: The thickness of the first connecting plate is H1, and the thickness of the second connecting plate is H2, wherein 0.5 mm ≤ H1 ≤ 2.5 mm, 0.5 mm ≤ H2 ≤ 2.0 mm; and / or, The thickness of the third connecting plate is H3, and the thickness of the fourth connecting plate is H4, wherein 0.5 mm ≤ H3 ≤ 2.5 mm, 0.5 mm ≤ H4 ≤ 2.0 mm; and / or, The second top cover connecting portion and the second tab connecting portion are integrally formed; and / or, The third connecting plate is connected to the second pole tab of one of the core packages by laser welding, and the fourth connecting plate is connected to the second pole tab of the other core package by laser welding.
7. The connection assembly according to any one of claims 1 to 4, characterized in that: The top cover connecting portion includes a base plate and an extension plate, the base plate is bently connected to the one end of the first main body plate, the extension plate is bently connected to the one end of the base plate away from the first main body plate, the extension plate is located on the base plate and arranged opposite to the base plate, and is used to connect to the first pole of the top cover assembly.
8. A battery, characterized in that: It comprises the connection assembly as described in any one of claims 1 to 7, two adjacent core packages and a top cover assembly.
9. The battery according to claim 8, characterized in that The core package includes a core package main body, the first pole ear extends out from one side of the core package main body in a bent manner, and a receiving groove is formed between the first pole ear and the core package main body, and the receiving groove is used to receive the first connecting plate or the second connecting plate.
10. The battery according to claim 9, characterized in that The first pole tab is welded to the first connecting plate or the second connecting plate at a pole tab welding portion, the length of the pole tab welding portion is L1, and the width of the pole tab welding portion is L2, wherein 20 mm ≤ L1 ≤ 40 mm, and 5 mm ≤ L2 ≤ 20 mm.