Assembling structure of novel steel shell battery

Abstract

The utility model discloses a novel assembly structure of a steel shell battery, which comprises a steel shell, a cover plate is welded on the steel shell, a battery roll core is arranged in the steel shell, the battery roll core is electrically connected with the cover plate through a roll core tab, a cover plate insulation surface pad is adhered on the inner wall of the cover plate, and the cover plate insulation surface pad is adhered on the inner wall of the steel shell. And an anti-scald insulating surface pad is adhered to the upper end of the battery roll core. The utility model discloses.

Description

Technical Field

[0001] The utility model specifically relates to the field of steel shell batteries, and in particular to an assembly structure of a novel steel shell battery. Background Art

[0002] Among cylindrical lithium batteries, most manufacturers use steel as the battery shell material, because the physical stability of steel material and its pressure resistance are much higher than that of aluminum shell material. After the design structure optimization of each manufacturer, the safety device has been placed inside the battery core. The safety of steel shell cylindrical batteries has reached a new height. The battery cells of most laptop batteries use steel shells as carriers.

[0003] When steel-shell batteries are welded during production, due to the high power of the laser, the local heat is large during welding, which can easily burn the diaphragm in the battery core. In addition, during welding, the burrs on the weld points can easily cause the positive and negative electrodes on the cover to contact, resulting in a short circuit. Existing steel-shell batteries are mostly protected by a single-layer insulating surface pad and weld protection glue. However, the space they occupy is large. After the single-layer insulating surface pad is laid, it is difficult to inject liquid into the battery core.

[0004] To this end, we proposed a new steel shell battery assembly structure to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the problems in the prior art that the diaphragm in the battery roll core is easily burned during welding of the steel shell battery, and it is easy to cause a short circuit. When protecting the battery, the space occupied is large and the injection is difficult. A new assembly structure of the steel shell battery is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A novel steel shell battery assembly structure comprises a steel shell, a cover plate welded on the steel shell, a battery core installed in the steel shell, the battery core and the cover plate being electrically connected via the core tabs, an insulating cover pad being adhered to the inner wall of the cover plate, and an anti-scalding insulating pad being adhered to the upper end of the battery core.

[0008] Preferably, the thickness of the cover plate insulating surface pad exceeds the thickness of the welding point burr.

[0009] Preferably, the cover plate insulating surface pad is made of high temperature resistant insulating material.

[0010] Preferably, the insulating surface pad of the cover plate is arranged in a circular shape, and its diameter is slightly smaller than the inner diameter of the cover plate.

[0011] Preferably, the anti-scalding insulating surface pad is arranged in a ring shape, the outer diameter of the anti-scalding insulating surface pad is the same as the inner diameter of the cover plate, and the inner diameter of the anti-scalding insulating surface pad is slightly smaller than the outer diameter of the cover plate insulating surface pad.

[0012] Preferably, the anti-scalding insulating surface pad is made of high temperature resistant insulating material.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By arranging an anti-scalding insulating surface pad and a cover insulating surface pad, the anti-scalding insulating surface pad is attached to the winding core, and then the winding core pole ear and the cover are welded, and then the cover insulating surface pad is attached to the inner layer of the cover, and then the cover is covered for welding. When the cover is covered, since the inner diameter of the anti-scalding insulating surface pad is slightly smaller than the outer diameter of the cover insulating surface pad, a part of the anti-scalding insulating surface pad and the cover insulating surface pad overlap and contact each other, and the part of the anti-scalding insulating surface pad that is larger than the cover insulating surface pad protects the crushed diaphragm. During welding, heat is prevented from being transferred to the bottom of the cover insulating surface pad and the anti-scalding insulating surface pad, thereby protecting the diaphragm. Moreover, since the cover insulating surface pad fits the inner layer of the cover, during welding, no welding burrs will contact the two poles of the cover, thereby preventing short circuits. The battery winding core is not covered as a whole, which saves space inside the steel shell and facilitates liquid injection into the battery.

[0015] The utility model adopts a combination of two insulating surface pads to achieve the effects of protecting welding points, insulating against short circuits, and preventing diaphragms from being scalded. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural stereogram of an assembly structure of a novel steel shell battery proposed in the utility model;

[0017] Figure 2 This is a structural stereogram of a cover plate insulating surface pad in an assembly structure of a novel steel shell battery proposed in the utility model;

[0018] Figure 3 This is a structural stereogram of an anti-scalding insulating surface pad in an assembly structure of a novel steel shell battery proposed by the utility model.

[0019] In the figure: 1 steel shell, 2 cover plate, 3 battery core, 4 core tab, 5 cover plate insulating surface pad, 6 anti-scalding insulating surface pad. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below 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, rather than all of the embodiments.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0026] Reference Figure 1-3 A new type of steel shell battery assembly structure includes a steel shell 1, a cover plate 2 is welded on the steel shell 1, a battery core 3 is installed in the steel shell 1, the battery core 3 and the cover plate 2 are electrically connected through the core ear 4, and a cover plate insulating surface pad 5 is pasted on the inner wall of the cover plate 2. Specifically, the thickness of the cover plate insulating surface pad 5 exceeds the thickness of the welding point burr. Furthermore, the cover plate insulating surface pad 5 is made of high temperature resistant insulating material.

[0027] In the utility model, an anti-scalding insulating surface pad 6 is pasted on the upper end of the battery roll core 3. It should be noted that the cover insulating surface pad 5 is circular in shape, and its diameter is slightly smaller than the inner diameter of the cover 2. Furthermore, the anti-scalding insulating surface pad 6 is annular in shape, and its outer diameter is the same as the inner diameter of the cover 2, and its inner diameter is slightly smaller than the outer diameter of the cover insulating surface pad 5. Furthermore, the anti-scalding insulating surface pad 6 is made of high temperature resistant insulating material.

[0028] In the utility model, the anti-scalding insulating surface pad 6 is attached to the battery winding core 3, and then the winding core pole ear 4 is welded to the cover plate 2, and then the cover plate insulating surface pad 5 is attached to the inner layer of the cover plate 2, and then the cover plate 2 is covered for welding. When the cover plate 2 is covered, since the inner diameter of the anti-scalding insulating surface pad 5 is slightly smaller than the outer diameter of the cover plate insulating surface pad 6, a part of the anti-scalding insulating surface pad 5 and the cover plate insulating surface pad 6 overlap and contact each other, and the part of the anti-scalding insulating surface pad 5 that is larger than the cover plate insulating surface pad 6 protects the crushed diaphragm. During welding, heat is prevented from being transmitted to the bottom of the cover plate insulating surface pad 6 and the anti-scalding insulating surface pad 5, thereby playing an effect of protecting the diaphragm.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel steel shell battery assembly structure, comprising a steel shell (1), a cover plate (2) welded to the steel shell (1), a battery core (3) installed in the steel shell (1), the battery core (3) and the cover plate (2) being electrically connected via a core tab (4), characterized in that: The inner wall of the cover plate (2) is adhered with a cover plate insulating surface pad (5), and the upper end of the battery coil core (3) is adhered with an anti-scalding insulating surface pad (6).

2. The assembly structure of a new steel shell battery as claimed in claim 1, characterized in that: The thickness of the cover plate insulating surface pad (5) exceeds the thickness of the welding point burr.

3. The assembly structure of a new steel shell battery as claimed in claim 1, characterized in that: The cover plate insulating surface pad (5) is made of a high temperature resistant insulating material.

4. The assembly structure of a new steel shell battery as claimed in claim 1, characterized in that: The cover plate insulating surface pad (5) is arranged in a circular shape, and its diameter is slightly smaller than the inner layer diameter of the cover plate (2).

5. The assembly structure of a new steel shell battery as claimed in claim 1, characterized in that: The anti-scalding insulating surface pad (6) is arranged in a ring shape, the outer diameter of the anti-scalding insulating surface pad (6) is the same as the inner diameter of the cover plate (2), and the inner diameter of the anti-scalding insulating surface pad (6) is slightly smaller than the outer diameter of the cover plate insulating surface pad (5).

6. The assembly structure of a new steel shell battery as claimed in claim 1, characterized in that: The anti-scalding insulating surface pad (6) is made of a high-temperature resistant insulating material.

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