Battery cell packaging structure and cylindrical battery thereof

Abstract

The utility model relates to the technical field of cylindrical batteries, and discloses a battery cell packaging structure and a cylindrical battery thereof. The cell packaging structure comprises a shell and an upper cover assembly, the upper cover assembly is fixedly connected with an opening of the shell, the upper cover assembly comprises a positive pole and a negative steel ring which are arranged on the same horizontal plane, the positive pole is embedded in the negative steel ring, a positive adapter is welded to the top end face of the positive pole, and a negative adapter is welded to the top end face of the negative pole. A negative electrode adapter is welded on the top end surface of the negative electrode far away from the outer diameter of the positive electrode post, so that the positive electrode adapter and the negative electrode adapter are positioned on the end surfaces in the same direction. The cylindrical battery provided by the utility model comprises a battery core packaging mechanism and a battery core arranged in the shell, according to the cylindrical battery, electric connection modes such as welding and plugging of different electric connection terminals on an electronic product can be realized without changing the structure of the cylindrical battery, so that the assembly process of the cylindrical battery on the electronic product is simplified, and the adaptability of the cylindrical battery is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of cylindrical batteries, in particular to a battery cell packaging structure and a cylindrical battery thereof. Background Art

[0002] Cylindrical batteries have become the mainstream application battery form today. Their small size advantage enables them to be used in many small electronic devices, such as TWS headphones.

[0003] The positive and negative electrodes of existing cylindrical batteries are separately arranged at both ends of the battery. During the assembly process of electronic products, the positive and negative electrodes at both ends of the cylindrical battery need to be electrically connected to the power terminals on the circuit board of the electronic product. Most of the power terminals are arranged on the circuit board at close intervals. Since the positive and negative electrodes of the cylindrical battery are not on the same end surface, one end needs to be connected to the terminal by a lead wire, which leads to the problem of complex assembly process and low adaptability of existing cylindrical batteries on electronic products.

[0004] Therefore, there is an urgent need for a battery cell packaging structure and a cylindrical battery thereof to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of the utility model is to provide a battery cover and a cylindrical battery thereof, so as to solve the problem that the positive and negative electrodes of the cylindrical battery in the background technology are not on the same end face, and one end needs to be connected to the terminal by a lead wire, which leads to the problem that the existing cylindrical battery has a complex assembly process and low adaptability in electronic products.

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

[0007] The utility model provides a battery cell packaging structure comprising:

[0008] A housing for housing the battery cell;

[0009] The upper cover assembly comprises a positive pole post and a negative pole steel ring arranged on the same horizontal plane, wherein the positive pole post is embedded in the negative pole steel ring, a positive pole adapter is welded on the top surface of the positive pole post, and a negative pole adapter is welded on the top surface of the negative pole away from the outer diameter of the positive pole post;

[0010] Wherein, the upper cover assembly is fixedly connected to the opening of the shell.

[0011] As an optional technical solution for a battery cell packaging structure, a limit plate portion is sunken along the center of the negative electrode steel ring, and a clearance hole is opened in the center of the limit plate portion.

[0012] As an optional technical solution for a battery cell packaging structure, the limiting disk portion is also provided with an insulating rubber ring matching the limiting disk portion, and the positive electrode column is connected to the negative electrode steel ring through the insulating rubber ring by hot-melt sealing.

[0013] As an optional technical solution for a battery cell packaging structure, a protrusion is provided at the center of the bottom of the positive electrode column, and the protrusion passes through the insulating rubber ring and the air avoidance hole in sequence and extends into the shell.

[0014] As an optional technical solution for the battery cell packaging structure, the shell further includes a recessed platform arranged along the opening of the shell, and the negative electrode steel ring is arranged on the recessed platform and is welded and fixed to the opening of the shell.

[0015] The utility model also provides a cylindrical battery, including the above-mentioned battery cell packaging structure, and also including a battery cell and a positive electrode tab arranged at the upper end of the battery cell, the battery cell is embedded in the shell, and the two ends of the positive electrode tab are electrically connected to the positive electrode column and the battery cell respectively.

[0016] As an optional technical solution for cylindrical batteries, an isolation rubber ring is provided between the negative electrode steel ring and the battery cell to electrically isolate the battery cell from the negative electrode steel ring.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides a battery cell packaging structure, including a shell and an upper cover assembly, the upper cover assembly is welded and sealed to the shell opening, the positive pole is embedded in the negative steel ring, the negative steel ring reserves a sufficient contact area for the pole adapter, and the positive pole adapter is welded on the positive pole and the negative pole adapter is welded on the negative steel ring, so that the positive and negative poles are in the same direction and the installation distance between the positive adapter and the negative adapter can be flexibly adjusted.

[0019] The cylindrical battery provided by the utility model comprises: a battery cell embedded in a shell and the above-mentioned upper cover assembly, the positive and negative electrodes of the cylindrical battery are arranged at the same end, and the installation distance of the positive and negative electrode adapters can be adjusted, so that when the cylindrical battery is electrically connected to the power terminals on the electronic product, there is no need to make lead connections from the other end of the cylindrical battery, and the positive and negative electrode adapters can be directly electrically connected to the power terminals of the electronic product. At the same time, adapters matching the power terminals can be welded on the positive pole column and the negative pole steel ring of the cylindrical battery according to the model and specifications of the power terminals, and the cylindrical battery can be electrically connected to different power terminals on the electronic product by welding, plugging, etc. without changing the structure of the cylindrical battery itself, which simplifies the assembly process of the cylindrical battery on the electronic product and makes it more adaptable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a cylindrical battery in an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of an explosion of a cylindrical battery in an embodiment of the utility model;

[0022] Figure 3 It is a cross-sectional view of a cylindrical battery in an embodiment of the utility model;

[0023] Figure 4 For this utility model Figure 3 The enlarged schematic diagram of the middle A part;

[0024] Figure 5 This is a schematic structural diagram of the upper cover assembly in the first viewing angle in an embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the upper cover assembly in the second viewing angle in the embodiment of the utility model;

[0026] In the figure: 1. shell; 11. recess; 12. battery cell; 13. positive electrode ear; 2. upper cover assembly; 222. limit plate; 223. air avoidance hole; 21. positive pole; 211. raised part; 201. positive electrode adapter; 22. negative electrode steel ring; 202. negative electrode adapter; 23. insulating rubber ring; 24. isolation rubber ring. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0028] In the description of the present invention, unless otherwise clearly specified or limited, the terms "connected", "connected" and "fixed" 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 directly connected or indirectly connected through an intermediate medium; it can be an internal connection between two components.

[0029] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present utility model.

[0032] In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more than two. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] like Figure 1-5 As shown, the utility model provides a battery cell packaging structure including: a shell 1 for accommodating a battery cell 12; an upper cover assembly 2, including a positive pole column 21 and a negative steel ring 22 arranged on the same horizontal plane, the positive pole column 21 is embedded in the negative steel ring 22, a positive pole adapter 201 is welded on the top surface of the positive pole column 21, and a negative pole adapter 202 is welded on the top surface of the negative pole away from the outer diameter of the positive pole column 21; wherein the upper cover assembly 2 is fixedly connected to the opening of the shell 1. By embedding the positive pole column 21 in the negative steel ring 22, the negative steel ring 22 reserves sufficient contact area for the pole adapter, and the structure of welding the positive pole adapter 201 on the positive pole column 21 and welding the negative pole adapter 202 on the negative steel ring 22 ensures that the positive and negative poles are in the same direction, and the installation distance between the positive pole adapter 201 and the negative pole adapter 202 can be adjusted.

[0034] The cylindrical battery provided by the utility model includes: a battery cell 12 embedded in a shell 1 and the above-mentioned upper cover assembly 2, the positive and negative electrodes of the cylindrical battery are arranged at the same end, and the installation distance of the positive and negative electrode adapters can be adjusted, so that when the cylindrical battery is electrically connected to the power terminal on the electronic product, there is no need to connect the lead wires from the other end of the cylindrical battery, and the positive and negative electrode adapters can be directly electrically connected to the power terminal of the electronic product. At the same time, adapters matching the power terminals can be welded on the positive and negative electrode steel rings 22 of the cylindrical battery according to the model and specification of the power terminals, and the cylindrical battery can be electrically connected to different power terminals on the electronic product by welding, plugging, etc. without changing the structure of the cylindrical battery itself, which simplifies the assembly process of the cylindrical battery on the electronic product and makes it more adaptable. At the same time, compared with the existing soft-package polymer lithium battery, the consistency of the external dimensions of the cylindrical battery is more suitable for production by fully automated production equipment, and the structure of the shell and the upper cover assembly laser welding formation makes the capacity of cylindrical batteries of the same size larger.

[0035] Specifically, Figure 2 As shown, the shell 1 is a cylinder with an opening at one end, and a accommodating cavity is formed in the cylinder for carrying the battery cell 12. A positive pole ear is provided at the upper end of the battery cell 12, one end of the positive pole ear is electrically connected to the battery cell, and the other end is electrically connected to the positive pole column; the adapter welded on the positive and negative steel rings can be a metal part with good conductivity such as a pin, a sheet, a cylinder or a nickel sheet.

[0036] In this embodiment, if Figure 2 , 5 As shown in Figure 6, a limiting disk portion 222 is provided downwardly with the axis of the negative steel ring 22 as the center, and the limiting disk portion 222 can limit the position of the positive pole 21 embedded in the negative steel ring 22. An insulating rubber ring 23 is also provided between the positive pole 21 and the negative steel ring 22. The diameters of the positive pole 21, the insulating rubber ring 23 and the limiting disk portion 222 match, and the positive pole 21 is fixed and bonded to the negative steel ring 22 through the insulating rubber ring 23. The insulating rubber ring 23 can effectively improve the corrosion resistance of the overall packaging structure of the battery cell 12 while meeting the bonding insulation, effectively prolong the service life, and avoid various problems caused by corrosion.

[0037] Further, such as Figure 6As shown, a protrusion 211 integrally formed with the positive electrode column 21 is provided with a downward protrusion with the center of the positive electrode column 21 as a base point, and the protrusion 211 is a cylindrical or rectangular parallelepiped structure; and a clearance hole 223 matching the protrusion 211 is opened at the center of the limiting plate portion 222, and the protrusion 211 is successively penetrated by an insulating rubber ring 23 and the clearance hole 223 to extend to above the battery cell 12 inside the shell 1, and the downward protrusion structure of the protrusion 211 can better be electrically connected with the positive electrode ear 13, such as laser welding; the spacing distance between the positive electrode ear 13 and the negative electrode steel ring 22 is increased, and the safety of the battery is further enhanced.

[0038] Specifically, the insulating rubber ring 23 is made of an insulating material with corrosion resistance, anti-aging and other properties. The positive pole 21 and the negative steel ring 22 are bonded and connected by the insulating rubber ring 23, so that the positive pole 21 and the negative steel ring 22 are in the same horizontal plane. After the positive pole 21 and the negative steel ring 22 are bonded, the circumferential edge of the insulating rubber ring 23 can block the gap reserved between the circumferential edge of the positive pole 21 and the limiting plate portion 222, thereby better ensuring the insulation between the positive pole 21 and the negative steel ring 22.

[0039] In this embodiment, if Figure 2 As described, a recess 11 is formed in the circumferential direction of the opening of the shell 1, the outer diameter of the negative electrode steel ring 22 matches the recess 11, the negative electrode steel ring 22 is arranged on the recess 11, and the outer edge of the negative electrode steel ring 22 is sealed and fixedly connected with the outer edge of the opening of the shell 1 by laser welding.

[0040] Furthermore, an isolation rubber ring 24 is provided on the lower bottom surface of the limiting disk portion 222 on the negative steel ring 22. The isolation rubber ring 24 is a sheet made of an insulating material with a sticky side. The insulating material may be PET (polyethylene terephthalate) or PI (polyimide), etc. The isolation rubber ring 24 has a sticky side adhered to the bottom surface of the limiting disk portion 222. When the battery and the electronic product are being assembled, for example, when the battery positive and negative electrode adapter 202 is inserted into the power terminal of the circuit board by plugging and unplugging, there will be a relative force pressing the upper cover assembly 2 toward the shell 1, which may cause the conflict between the negative steel ring 22 and the battery cell 12, resulting in battery short circuit and other problems. Providing an isolation rubber ring 24 between the negative steel ring 22 and the battery cell 12 can well avoid the occurrence of this problem and improve the stability of battery use.

[0041] The circular battery with the above structure has the positive and negative terminals arranged on the same end face, so there is no need to change the structure of the battery itself. It is only necessary to weld positive and negative electrode adapters of different specifications and models on the positive and negative electrode steel rings to match the different power terminals on the electronic products, which makes the assembly process of the circular battery on the electronic products simpler and its adaptability is more extensive.

[0042] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A battery cell packaging structure, characterized in that: include: A housing for housing the battery cell; The upper cover assembly comprises a positive pole post and a negative pole steel ring arranged on the same horizontal plane, wherein the positive pole post is embedded in the negative pole steel ring, a positive pole adapter is welded on the top surface of the positive pole post, and a negative pole adapter is welded on the top surface of the negative pole steel ring away from the outer diameter of the positive pole post; Wherein, the upper cover assembly is fixedly connected to the opening of the shell.

2. A battery cell packaging structure according to claim 1, characterized in that: A limiting disk portion is sunken along the center of the negative electrode steel ring, and a void hole is opened at the center of the limiting disk portion.

3. A battery cell packaging structure according to claim 2, characterized in that: The limiting disk portion is also provided with an insulating rubber ring matching the limiting disk portion, and the positive pole is connected to the negative pole steel ring through the insulating rubber ring by hot-melt sealing.

4. A battery cell packaging structure according to claim 3, characterized in that: A protrusion is provided at the center of the bottom of the positive pole, and the protrusion passes through the insulating rubber ring and the air avoidance hole in sequence and extends into the shell.

5. A battery cell packaging structure according to claim 4, characterized in that: The shell further comprises a concave platform arranged along the opening of the shell, and the negative electrode steel ring is arranged on the concave platform and is welded and fixed to the opening of the shell.

6. A cylindrical battery, comprising the battery cell packaging structure according to any one of claims 1 to 5, characterized in that: It also includes a battery cell and a positive electrode tab arranged at the upper end of the battery cell, the battery cell is embedded in the shell, and two ends of the positive electrode tab are electrically connected to the positive electrode column and the battery cell respectively.

7. A cylindrical battery according to claim 6, characterized in that: An isolation rubber ring is provided between the negative electrode steel ring and the battery core, which is used for electrical isolation between the battery core and the negative electrode steel ring.

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