Steel shell assembly and steel shell button cell

Abstract

The utility model provides a steel shell assembly and a steel shell button cell. The steel shell assembly comprises a containing shell and a cover plate, the cover plate covers the containing shell, the cover plate and the containing shell jointly define a sealed containing cavity, the containing shell comprises a main shell body, a side shell body and an insulation connecting piece, the main shell body is provided with a containing groove, the containing groove is provided with an opening, the side shell body is provided with a containing hole, and the insulation connecting piece is arranged in the containing hole. The insulating connecting piece is connected with the opening of the main shell and one end of the side shell, so that one end of the side shell is connected with the opening of the main shell in a sealed mode through the insulating connecting piece, the insulating connecting piece is provided with a communicating hole, and the containing groove, the communicating hole and the containing hole are sequentially communicated. The cover plate is connected to one end, far away from the insulating connecting piece, of the side shell, so that the cover plate, the side shell, the insulating connecting piece and the main shell jointly define a sealed accommodating cavity. Therefore, the thickness of the cover plate is reduced, the structural compactness of the cover plate is improved, the battery end space occupied by the cover plate is reduced, and the overall energy density of the battery is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of steel case button cells, and in particular to a steel case component and a steel case button cell. Background Art

[0002] Button batteries, also known as button batteries, are batteries that look like a small button. Generally speaking, they have a larger diameter and a thinner thickness. Button batteries are divided into soft-pack button batteries and steel-shell button batteries according to the material of their shell.

[0003] Soft-pack button batteries do not require a thick metal shell to protect the battery cell, so they can provide the same power output in a smaller and lighter volume. Therefore, soft-pack button batteries are widely used in electronic products. However, due to the softness of the shell material of soft-pack batteries, they are relatively fragile and easily squeezed or punctured, which affects the performance of the battery. Steel-shell button batteries have a stronger shell and can withstand greater external forces and vibrations, and their performance is relatively stable. Therefore, in order to improve the stability of button batteries, steel-shell button batteries are increasingly used.

[0004] For steel shell button cells, in the related art, for example, the preparation method of button cells and the button cells disclosed in document number CN112467268A, the button cells include a positive electrode shell, a negative electrode cover assembly and a battery cell assembly. The positive electrode shell is provided with a receiving cavity and a shell opening, and the shell opening is connected to the receiving cavity. The negative electrode cover assembly includes an outer cover, an insulating sheet and an electrode connecting sheet. The outer cover is welded to the positive electrode shell so that the outer cover covers the shell opening, the outer cover, the insulating sheet and the electrode connecting sheet are stacked in sequence, and the insulating sheet is connected to the outer cover and the electrode connecting sheet respectively, and the insulating sheet and the electrode connecting sheet are both located on one side of the outer cover adjacent to the receiving cavity. The outer cover is provided with a first opening, and the insulating sheet is provided with a second opening, and the first opening and the second opening are connected to each other. It can be seen that by arranging the insulating sheet between the outer cover and the electrode connecting sheet, the electrode connecting sheet is prevented from being electrically connected to the shell through the outer cover, thereby avoiding the problem of battery short circuit.

[0005] However, since an insulating sheet is connected between the electrode connecting sheet and the outer cover body, an insulating sheet is provided in the negative electrode cover assembly, that is, an insulating member is provided in the upper cover, resulting in a larger thickness of the upper cover and the insulating member occupying the space at the end of the battery, thereby reducing the overall energy density of the battery. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a steel shell component and a steel shell button battery with a smaller thickness and a higher energy density.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A steel shell assembly comprises a housing shell and a cover plate, wherein the cover plate is disposed on the housing shell, the cover plate and the housing shell together form a sealed housing cavity, and the housing shell comprises:

[0009] The main housing is provided with a receiving groove, wherein the receiving groove has an opening;

[0010] The side shell is provided with a receiving hole; and

[0011] The insulating connector is respectively connected to the opening of the main shell and one end of the side shell, so that one end of the side shell is sealed and connected to the opening of the main shell through the insulating connector. The insulating connector is provided with a connecting hole, and the accommodating groove, the connecting hole and the accommodating hole are connected in sequence; the cover plate is connected to one end of the side shell away from the insulating connector, so that the cover plate, the side shell, the insulating connector and the main shell together form the sealed accommodating cavity.

[0012] In one embodiment, a sealing groove is respectively formed at both ends of the insulating connector, the side shell is embedded in one of the sealing grooves, and the opening of the main shell is embedded in the other sealing groove.

[0013] In one embodiment, the insulating connector is respectively bonded to the opening of the main shell and one end of the side shell.

[0014] In one of the embodiments, the inner wall of one of the sealing grooves is in contact with the side shell, and the inner wall of the other sealing groove is in contact with the opening of the main shell.

[0015] In one embodiment, the insulating connector includes a reinforcing portion and an insulating portion, the reinforcing portion is embedded in the insulating portion, and the two ends of the insulating portion are respectively connected to the opening of the main shell and one end of the side shell, so that one end of the side shell is sealed and connected to the opening of the main shell through the insulating connector.

[0016] In one of the embodiments, a mounting hole is opened in the middle of the insulating portion, and the reinforcing portion is located in the mounting hole and bonded to the inner wall of the mounting hole.

[0017] In one embodiment, the hardness of the reinforcement portion is greater than the hardness of the insulation portion.

[0018] In one embodiment, the insulating portion is a rubber structure.

[0019] In one embodiment, the reinforcement portion is a metal structure.

[0020] A steel shell button battery comprises the steel shell assembly described in any one of the above embodiments.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] The insulating connector is connected to the opening of the main shell and one end of the side shell respectively, so that one end of the side shell is sealed and connected to the opening of the main shell through the insulating connector; the cover plate is connected to the end of the side shell away from the insulating connector, so that the cover plate, the side shell, the insulating connector and the main shell together form a sealed accommodating cavity. Since the main shell is connected to the side shell through the insulating connector, the insulating connector blocks the electrical connection between the main shell and the side shell, and then blocks the electrical connection between the cover plate and the main shell, so that there is no need to set an insulating sheet in the cover plate, which reduces the thickness of the cover plate, improves the structural compactness of the cover plate, and reduces the battery end space occupied by the cover plate, thereby improving the overall energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic structural diagram of a steel shell button battery according to an embodiment;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the steel shell assembly of the steel shell button battery shown;

[0026] Figure 3 for Figure 2 Schematic diagram of the partial structure of the steel shell assembly shown.

[0027] Figure numerals: steel shell button battery 10; steel shell assembly 100; accommodating shell 110; main shell 111; accommodating groove 1111; side shell 112; accommodating hole 1121; insulating connector 113; reinforcement part 113a; insulating part 113b; connecting hole 1131; sealing groove 1132; mounting hole 1133; cover plate 120; sealed accommodating cavity 101; winding core assembly 200. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0029] It should be noted that when an element is referred to as being "fixed to" 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", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0032] like Figure 1 As shown, a steel case button cell 10 according to an embodiment includes a steel case component 100 and a winding core component 200 , wherein the winding core component 200 is disposed inside the steel case component 100 .

[0033] like Figure 1 and Figure 2 As shown, in one embodiment, the steel shell assembly 100 includes a housing 110 and a cover plate 120, the cover plate 120 is covered on the housing 110, and the cover plate 120 and the housing 110 together form a sealed housing chamber 101, the housing 110 includes a main housing 111, a side housing 112 and an insulating connector 113, the main housing 111 is provided with a housing groove 1111, and the housing groove 1111 has an opening. The insulating connector 113 is respectively connected to the opening of the main housing 111 and one end of the side housing 112, so that one end of the side housing 112 is sealed and connected to the opening of the main housing 111 through the insulating connector 113, the side housing 112 is provided with a housing hole 1121, the insulating connector 113 is provided with a connecting hole 1131, and the housing groove 1111, the connecting hole 1131 and the housing hole 1121 are connected in sequence. The cover plate 120 is connected to one end of the side shell 112 away from the insulating connector 113, so that the cover plate 120, the side shell 112, the insulating connector 113 and the main shell 111 together form a sealed accommodating chamber 101, that is, a side surface of the cover plate 120 adjacent to the side shell 112, the inner wall of the insulating connector 113 and the inner wall of the main shell 111 together form a sealed accommodating chamber 101. In this embodiment, the sealed accommodating chamber 101 is used to accommodate the core assembly 200 and the electrolyte.

[0034] In the steel shell assembly 100, the insulating connector 113 is respectively connected to the opening of the main shell 111 and one end of the side shell 112, so that one end of the side shell 112 is sealed and connected to the opening of the main shell 111 through the insulating connector 113; the cover plate 120 is connected to the end of the side shell 112 away from the insulating connector 113, so that the cover plate 120, the side shell 112, the insulating connector 113 and the main shell 111 together form a sealed accommodating chamber 101. Since the main shell 111 is connected to the side shell 112 through the insulating connector 113, the insulating connector 113 blocks the electrical connection between the main shell 111 and the side shell 112, and further blocks the electrical connection between the cover plate 120 and the main shell 111, so that there is no need to set an insulating sheet in the cover plate 120, the thickness of the cover plate 120 is reduced, the structural compactness of the cover plate 120 is improved, and the battery end space occupied by the cover plate 120 is reduced, thereby improving the overall energy density of the battery.

[0035] like Figure 3 As shown, in one embodiment, a sealing groove 1132 is respectively provided at both ends of the insulating connector 113, and the side housing 112 is embedded in one of the sealing grooves 1132, thereby improving the connection stability between the side housing 112 and the insulating connector 113. The opening of the main housing 111 is embedded in the other sealing groove 1132, thereby improving the connection stability between the main housing 111 and the insulating connector 113.

[0036] like Figure 2 and Figure 3 As shown, in one embodiment, the insulating connector 113 is respectively bonded to the opening of the main housing 111 and one end of the side housing 112. In this embodiment, the insulating connector 113 is bonded to the main housing 111 and the side housing 112 by a heat sealing process, so that the main housing 111 is sealed and connected to the side housing 112 through the insulating connector 113.

[0037] It should be noted that the heat sealing process is a conventional technology in the field and will not be described in detail in this disclosure.

[0038] like Figure 2 and Figure 3 As shown, in one embodiment, the inner wall of one sealing groove 1132 is fitted with the side housing 112, which increases the connection area between the insulating connector 113 and the side housing 112, and improves the connection stability between the insulating connector 113 and the side housing 112. The inner wall of the other sealing groove 1132 is fitted with the opening of the main housing 111, which increases the connection area between the insulating connector 113 and the main housing 111, and improves the connection stability between the insulating connector 113 and the main housing 111.

[0039] like Figure 3As shown, in one embodiment, the insulating connector 113 includes a reinforcing portion 113a and an insulating portion 113b, the reinforcing portion 113a is embedded in the insulating portion 113b, and the two ends of the insulating portion 113b are respectively connected to the opening of the main shell 111 and one end of the side shell 112, so that one end of the side shell 112 is sealed and connected to the opening of the main shell 111 through the insulating connector 113.

[0040] like Figure 3 As shown, in one embodiment, a mounting hole 1133 is opened in the middle of the insulating portion 113 b , and the reinforcing portion 113 a is located in the mounting hole 1133 and bonded to the inner wall of the mounting hole 1133 .

[0041] like Figure 3 As shown, in one embodiment, the hardness of the reinforcing portion 113 a is greater than the hardness of the insulating portion 113 b.

[0042] like Figure 3 As shown, in one embodiment, the insulating portion 113b is a rubber structure. Of course, in other embodiments, the insulating portion 113b can be a silicone structure or other existing insulating structures.

[0043] like Figure 3 As shown, in one embodiment, the reinforcement part 113a is a metal structure. Further, the reinforcement part 113a is a steel structure, an aluminum structure or other existing metal structures resistant to electrolyte corrosion.

[0044] like Figure 2 As shown, in one embodiment, the insulating connector 113 is annular to ensure that the insulating connector 113 can seal the gap between the main housing 111 and the side housing 112 .

[0045] like Figure 2 As shown, in one embodiment, the side housing 112 is annular.

[0046] like Figure 2 As shown, in one embodiment, the side housing 112 is a steel structure and the main housing 111 is a steel structure.

[0047] Compared with the prior art, the present invention has at least the following advantages:

[0048] The insulating connector 113 is connected to the opening of the main shell 111 and one end of the side shell 112 respectively, so that one end of the side shell 112 is sealed and connected to the opening of the main shell 111 through the insulating connector 113; the cover plate 120 is connected to one end of the side shell 112 away from the insulating connector 113, so that the cover plate 120, the side shell 112, the insulating connector 113 and the main shell 111 together form a sealed accommodating chamber 101. Since the main shell 111 is connected to the side shell 112 through the insulating connector 113, the insulating connector 113 blocks the electrical connection between the main shell 111 and the side shell 112, and further blocks the electrical connection between the cover plate 120 and the main shell 111, so that there is no need to set an insulating sheet in the cover plate 120, which reduces the thickness of the cover plate 120, improves the structural compactness of the cover plate 120, and reduces the battery end space occupied by the cover plate 120, thereby improving the overall energy density of the battery.

[0049] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A steel shell assembly, comprising a housing and a cover plate, wherein the cover plate is disposed on the housing, and the cover plate and the housing together form a sealed housing cavity, characterized in that: The accommodating shell comprises: The main housing is provided with a receiving groove, wherein the receiving groove has an opening; The side shell is provided with a receiving hole; and The insulating connector is respectively connected to the opening of the main shell and one end of the side shell, so that one end of the side shell is sealed and connected to the opening of the main shell through the insulating connector. The insulating connector is provided with a connecting hole, and the accommodating groove, the connecting hole and the accommodating hole are connected in sequence; the cover plate is connected to one end of the side shell away from the insulating connector, so that the cover plate, the side shell, the insulating connector and the main shell together form the sealed accommodating cavity.

2. The steel shell assembly according to claim 1, characterized in that: The two ends of the insulating connector are respectively provided with a sealing groove, the side housing is embedded in one of the sealing grooves, and the opening of the main housing is embedded in the other sealing groove.

3. The steel shell assembly according to claim 2, characterized in that: The insulating connector is respectively bonded to the opening of the main shell and one end of the side shell.

4. The steel shell assembly according to claim 3, characterized in that: The inner wall of one of the sealing grooves is in contact with the side shell, and the inner wall of the other sealing groove is in contact with the opening of the main shell.

5. The steel shell assembly according to claim 1, characterized in that: The insulating connector includes a reinforcement portion and an insulating portion, the reinforcement portion is embedded in the insulating portion, and both ends of the insulating portion are respectively connected to the opening of the main shell and one end of the side shell, so that one end of the side shell is sealed and connected to the opening of the main shell through the insulating connector.

6. The steel shell assembly according to claim 5, characterized in that: A mounting hole is provided in the middle of the insulating portion, and the reinforcing portion is located in the mounting hole and bonded to the inner wall of the mounting hole.

7. The steel shell assembly according to claim 5, characterized in that: The reinforcing portion has a harderness than that of the insulating portion.

8. The steel shell assembly according to claim 5, characterized in that: The insulating part is a rubber structure.

9. The steel shell assembly according to claim 5, characterized in that: The reinforcement part is a metal structure.

10. A steel shell button battery, characterized in that: A steel shell assembly comprising the steel shell assembly according to any one of claims 1 to 9.

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