Connecting device and battery with same

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a connecting device and a battery with the same, which comprises a battery cell main body, and a positive current collector and a negative current collector which are positioned at the upper end and the lower end of the battery cell main body, the first connecting region is distributed in a spiral region surrounding the center of the positive current collector, the lower part of the first connecting region protrudes towards the surface of the battery cell main body, the second connecting region is located at the center of the positive current collector, and the protruding direction of the second connecting region is opposite to the surface of the battery cell main body; and a battery outer aluminum shell is also assembled on the outer side of the battery core main body in a sleeving manner. According to the utility model, the spiral area is arranged in the first connecting area, the connecting device is connected with the surface of the battery cell main body in a laser welding manner, and the second connecting area is welded with the battery anode cover plate, so that the welding efficiency is improved through laser welding, and meanwhile, the problems that the contact area of the connecting device is smaller and the firmness of the battery is low are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery manufacturing technical field, concretely is a connecting device and have the battery of this device. BACKGROUND

[0002] With the rapid development of science and technology, the application of batteries in daily life and industrial fields is more and more widely. From portable electronic devices to electric vehicles, from energy storage systems to aerospace, the performance and reliability of batteries are crucial. In the manufacturing process of the battery, the internal connecting device plays a key role, and the structure of the connecting sheet at both ends of the battery is one of the important components of the lithium battery.

[0003] However, the surface of the existing internal connecting piece of the battery is mostly flat, which can easily lead to low conductivity firmness during use, affecting the use effect.

[0004] Therefore, in order to solve the above problems, a connecting device and a battery with the device are provided. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a connecting device and a battery with the device to solve the problem of the flat surface of the existing internal connecting piece of the battery, which can easily lead to low conductivity firmness during use, affecting the use effect.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a connecting device, comprising a core body and a positive electrode current collector and a negative electrode current collector located at the upper and lower ends of the core body, the positive electrode current collector is internally provided with a first connection area and a second connection area, the first connection area is distributed around the center of the positive electrode current collector, and the first connection area is raised downward, and the direction of the first connection area is toward the surface of the core body, the second connection area is located at the center of the positive electrode current collector, and the second connection area is raised, and the direction of the second connection area is away from the surface of the core body.

[0007] As a further improvement of the present scheme, the first connection area is spirally distributed, and the maximum radius of the outer ring of the first connection area is matched with the size of the cross section of the core body, and the second connection area is a circular boss.

[0008] As a further improvement of the present scheme, the positive electrode current collector is set to be circular, and the size of the positive electrode current collector is matched with the size of the cross section of the core body.

[0009] As a further improvement of the present scheme, the first connection area is raised to a height of 0.1-1.0mm, and the second connection area is raised to a height of 0.05-0.8mm.

[0010] As a further further of the scheme, the first connecting area and the second connecting area are an integral structure, and the positive electrode current collector and the negative electrode current collector are both aluminum alloy materials.

[0011] To achieve the above object, the application further adopts the following technical scheme: the battery has the connecting device, the outer aluminum shell is further sleeved on the outer side of the battery, the positive electrode current collector and the negative electrode current collector are contained in the outer aluminum shell, the positive electrode current collector and the negative electrode current collector are arranged at the positive electrode and the negative electrode of the battery body respectively, and the first connecting area is laser welded with the battery body.

[0012] As a further further of the scheme, the battery outer aluminum shell is further provided with a battery positive electrode cover plate and a battery negative electrode cover plate at the upper end and the lower end, an insulating sheet is filled between the battery negative electrode cover plate and the negative electrode current collector, and the second connecting area is welded and fixed with the battery positive electrode cover plate.

[0013] As a further further of the scheme, the battery positive electrode cover plate is provided with a positive electrode column at the center of the surface, and the battery positive electrode cover plate and the battery negative electrode cover plate are provided with assembly grooves corresponding to the outer aluminum shell at one end side of the side edge close to the outer aluminum shell.

[0014] Compared with the prior art, the application has the following beneficial effects:

[0015] 1. The spiral area is arranged on the first connecting area, the connecting device is connected with the surface of the battery body by laser welding, the second connecting area is welded with the battery positive electrode cover plate, the welding efficiency is improved by continuous laser welding, the problem of small contact area of the connecting device and low firmness of the battery is solved, and the convenience and practicality of the connecting device are improved.

[0016] 2. The outer aluminum shell is arranged, the battery positive electrode cover plate and the battery negative electrode cover plate are combined and assembled by the assembly of the outer aluminum shell during the welding operation, a complete battery body is formed, the production and manufacturing of the battery are facilitated, and the convenience and practicality of the connecting device are improved. DETAILED DESCRIPTION

[0017] Figure 1 It is a front view of the overall structure of the utility model;

[0018] Figure 2 It is a front view of the overall structure of the utility model;

[0019] Figure 3 It is a front view of the overall structure of the utility model;

[0020] Figure 4 It is a front view of the overall structure of the utility model;

[0021] Figure 5 It is the whole structure front view cross section perspective diagram of the utility model;

[0022] In the figure: 100, the main body of the battery cell; 110, the positive current collector; 111, the first connection area; 112, the second connection area; 120, the negative current collector; 130, the outer aluminum shell of the battery; 140, the positive cover plate of the battery; 150, the positive column; 160, the insulating sheet; 170, the negative cover plate of the battery; 171, the assembly groove. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. 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 utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-5 The embodiment provided by the utility model provides:

[0025] The embodiment provides a connecting device, which comprises a main body of a battery cell 100, a positive current collector 110 and a negative current collector 120 located at the upper and lower ends of the main body of the battery cell 100, a first connection area 111 and a second connection area 112 arranged inside the positive current collector 110, the first connection area 111 distributed in a spiral area around the center of the positive current collector 110, and the first connection area 111 protrudes downward toward the surface of the main body of the battery cell 100, the second connection area 112 located at the center of the positive current collector 110, and the second connection area 112 protrudes away from the surface of the main body of the battery cell 100.

[0026] As a more detailed embodiment, the first connection area 111 is spirally distributed, and the maximum radius of the outer spiral of the first connection area 111 matches the size of the cross-sectional area of the main body of the battery cell 100, and the second connection area 112 is a circular boss, which facilitates the welding and assembly of the main body of the battery cell 100 and the subsequent positive cover plate 140 of the battery, and makes the subsequent use more firm.

[0027] As a more detailed embodiment, the positive current collector 110 is circular, and the size of the positive current collector 110 matches the size of the cross-sectional area of the main body of the battery cell 100, which facilitates the assembly of the main body of the battery cell 100 and the subsequent positive cover plate 140 of the battery, and makes the subsequent assembly and use more convenient.

[0028] As a more detailed embodiment of the present embodiment, the first connecting area 111 has a protruding height of 0.1-1.0 mm, and the second connecting area 112 has a protruding height of 0.05-0.8 mm. Through this design, the protruding part is facilitated to contact and be welded with the welded part during welding operation.

[0029] As a more detailed embodiment of the present embodiment, the first connecting area 111 and the second connecting area 112 are integrated structures, and the positive current collector 110 and the negative current collector 120 are both made of aluminum alloy material.

[0030] Embodiment Two:

[0031] The present embodiment provides a battery with the connecting device. The battery outer aluminum shell 130 is further sleeved and assembled outside the battery cell body 100. The positive current collector 110 and the negative current collector 120 are accommodated inside the battery outer aluminum shell 130. The positive current collector 110 and the negative current collector 120 are respectively arranged at the positive and negative terminals of the battery cell body 100. The first connecting area 111 is laser welded with the battery cell body 100. Through this design, the welding assembly operation is facilitated.

[0032] As a more detailed embodiment of the present embodiment, the battery outer aluminum shell 130 is further provided with the battery positive cover plate 140 and the battery negative cover plate 170 at the upper and lower ends. The battery negative cover plate 170 and the negative current collector 120 are filled with the insulating sheet 160. The second connecting area 112 is welded and fixed with the battery positive cover plate 140. Through this design, the relatively complete battery body is facilitated, and production is facilitated.

[0033] As a more detailed embodiment of the present embodiment, the battery positive cover plate 140 is integrally provided with the positive post 150 at the center of the surface. The battery positive cover plate 140 and the battery negative cover plate 170 are provided with the assembly groove 171 corresponding to the battery outer aluminum shell 130 at the side edge of one end close to the battery outer aluminum shell 130. Through this design, the battery negative cover plate 170, the battery positive cover plate 140, and the battery outer aluminum shell 130 are combined and assembled, so that production is more convenient.

[0034] Working principle: in the welding operation, through the setting of the first connecting area 111 and the second connecting area 112, the positive current collector 110 is facilitated to be laser welded with the battery main body 100 and the battery positive cover plate 140, and the same welding assembly battery negative cover plate 170 and negative current collector 120; in the welding operation, through the spiral area arranged in the first connecting area 111, the connecting device is connected with the surface of the battery main body 100 by means of laser welding, the second connecting area 112 is welded with the battery positive cover plate 140, the welding efficiency is improved by continuous laser welding, the problem of small contact area of the connecting device and low firmness of the battery is solved, and the battery is set in the battery outer aluminum shell 130. The battery positive cover plate 140 and the battery negative cover plate 170 are facilitated to form a relatively complete battery main body, facilitating subsequent use, and the operation ends here.

[0035] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any equivalent changes, modifications and evolution made by those skilled in the art within the scope of the technical scheme of the present application, using the above disclosed technical content, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A connecting device comprising a cell body (100) and a positive current collector (110) and a negative current collector (120) located at the upper and lower ends of the cell body (100), characterized in that: The positive electrode current collector (110) is internally provided with a first connecting area (111) and a second connecting area (112), the first connecting area (111) is distributed in a spiral area around the center of the positive electrode current collector (110), and the first connecting area (111) is raised towards the surface of the battery body (100), the second connecting area (112) is located at the center of the positive electrode current collector (110), and the second connecting area (112) is raised away from the surface of the battery body (100), the first connecting area (111) is spirally distributed, and the maximum radius of the outer circle of the first connecting area (111) matches the size of the cross-sectional area of the battery body (100), and the second connecting area (112) is a circular boss.

2. A connection device according to claim 1, characterised in that: The positive electrode current collector (110) is provided in a circular shape, and the size of the positive electrode current collector (110) matches the size of the cross-sectional area of the battery body (100).

3. A connection device according to claim 1, characterised in that: The first connecting area (111) has a raised height of 0.1-1.0mm, and the second connecting area (112) has a raised height of 0.05-0.8mm.

4. A coupling device according to claim 1, characterised in that: The first connecting area (111) and the second connecting area (112) are an integral structure, and the positive electrode current collector (110) and the negative electrode current collector (120) are both made of aluminum alloy material.

5. A battery having a connection device as claimed in any one of claims 1-4, characterized in that: The battery body (100) is further provided with a battery outer aluminum shell (130) on the outside, the positive electrode current collector (110) and the negative electrode current collector (120) are accommodated in the battery outer aluminum shell (130), the positive electrode current collector (110) and the negative electrode current collector (120) are respectively arranged at the positive electrode and the negative electrode of the battery body (100), the first connecting area (111) is laser welded with the battery body (100), the battery outer aluminum shell (130) is further provided with a battery positive electrode cover plate (140) and a battery negative electrode cover plate (170) at the upper and lower ends, the battery negative electrode cover plate (170) and the negative electrode current collector (120) are filled with an insulating sheet (160), the second connecting area (112) is welded and fixed with the battery positive electrode cover plate (140), the battery positive electrode cover plate (140) is integrally provided with a positive electrode post (150) at the center of the surface, and the battery positive electrode cover plate (140) and the battery negative electrode cover plate (170) are provided with assembly grooves (171) corresponding to the battery outer aluminum shell (130) at the side edges of the end close to the battery outer aluminum shell (130).

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