Aluminum-shell single-pole cylindrical sodium ion battery

Abstract

The utility model discloses an aluminum shell single pole column cylindrical sodium ion battery, the aluminum shell single pole column cylindrical sodium ion battery comprises a battery cell (1) and a shell (2), the top of the battery cell (1) is provided with an upper cover plate (3), and the bottom of the battery cell (1) is provided with a lower cover plate (4); the shell (2) is sleeved outside the battery cell (1), and the upper end and the lower end of the shell (2) are hermetically welded with the upper cover plate (3) and the lower cover plate (4) respectively; wherein tabs at the upper end and the lower end of the battery cell (1) are all tabs, a pole column (12) is further arranged at the top of the upper cover plate (3), the pole column (12) can be used as a positive electrode electrified part of the battery to be connected with an external power supply, and the lower cover plate (4) is not provided with the pole column and is in a plain end design. The aluminum-shell single-pole cylindrical sodium-ion battery is stable in structure and low in manufacturing cost, the internal resistance of the battery is reduced, and the multiplying power and the cycle performance are optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an aluminum shell single-pole cylindrical sodium ion battery. Background Art

[0002] Traditional cylindrical sodium-ion battery structures are mostly steel or aluminum shell bipolar columns. With the development of laser welding equipment, the positive and negative poles of the existing bipolar column structure batteries are not obvious, the standing stability is poor, and it is inconvenient to use in daily life and has poor practicality. Utility Model Content

[0003] The purpose of the utility model is to provide an aluminum shell single-pole cylindrical sodium ion battery, which has a stable structure, low manufacturing cost, reduced battery internal resistance, and optimized rate and cycle performance.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an aluminum shell single-pole cylindrical sodium ion battery, which includes a battery cell and a shell, wherein an upper cover plate is provided on the top of the battery cell and a lower cover plate is provided on the bottom. The shell is sleeved on the outside of the battery cell and the upper and lower ends are respectively sealed and welded to the upper cover plate and the lower cover plate; wherein,

[0005] The tabs at the upper and lower ends of the battery cell are full tabs, and there is also a pole on the top of the upper cover. The pole is designed to be able to serve as the positive pole of the battery and connect to an external power supply. In addition, there is no pole on the lower cover and it has a flat design.

[0006] Preferably, an insulating bracket is provided between the upper cover plate and the battery cell.

[0007] Preferably, a liquid injection port is provided on the positive electrode cover of the upper cover near the electrode column for injecting electrolyte into the battery cell.

[0008] Preferably, a bursting safety valve is provided on the upper cover plate at a position symmetrical to the liquid injection port.

[0009] Preferably, a busbar is provided on the upper cover plate, and the busbar is connected to the positive electrode tab of the battery cell.

[0010] Preferably, a busbar is provided on the negative electrode cover of the lower cover, and the busbar is connected to the negative electrode tab of the battery cell.

[0011] Preferably, the housing, the upper cover plate, the lower cover plate and the poles are all made of aluminum.

[0012] According to the above technical solution, the utility model sets an upper cover plate on the top of the battery cell, sets a lower cover plate on the bottom, and sets the shell on the outside of the battery cell. The upper and lower ends are respectively sealed and welded with the upper cover plate and the lower cover plate, thereby changing the common sealing method to peripheral welding, which has a better sealing effect. At the same time, a pole is also provided on the top of the upper cover plate, which serves as the positive pole of the battery and is connected to the external power supply. In addition, there is no pole on the lower cover plate and it has a flat mouth design. The lower cover plate is formed by peripheral welding with the shell as a whole, and is connected to the external power supply as the negative pole. In this way, the positive and negative poles of the single-pole structure are more obvious than those of the traditional aluminum shell bipolar column battery cell, and the structural stability is stronger. In addition, the pole ears at the upper and lower ends of the battery cell adopt full pole ears. The full pole ear structure makes the internal resistance of the battery smaller and the rate and cycle performance better.

[0013] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a structural diagram of an aluminum shell single-pole cylindrical sodium ion battery provided by the utility model;

[0016] Figure 2 This is a cross-sectional view of an aluminum shell single-pole cylindrical sodium ion battery provided by the utility model;

[0017] Figure 3 This is a top view of the upper cover plate of the aluminum shell single-pole cylindrical sodium ion battery provided by the utility model;

[0018] Figure 4 This is a bottom view of the upper cover plate of the aluminum shell single-pole cylindrical sodium ion battery provided by the utility model;

[0019] Figure 5 This is a top view of the lower cover plate of the aluminum shell single-pole cylindrical sodium ion battery provided by the utility model;

[0020] Figure 6 The figure is a bottom view of the lower cover plate of the aluminum shell single-pole cylindrical sodium ion battery provided by the utility model.

[0021] Description of Reference Numerals

[0022] 1-battery core 2-shell

[0023] 3-Upper cover 4-Lower cover

[0024] 5-busbar 11-positive electrode cover

[0025] 12-Pole 13-Insulation bracket

[0026] 14-Liquid injection port 15-Explosion safety valve

[0027] 16-Negative electrode cover DETAILED DESCRIPTION

[0028] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0029] In the present invention, unless otherwise stated, directional words such as "up, down, top, bottom, inside, outside" contained in the terms merely represent the directions of the terms in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the terms.

[0030] See also Figure 1 The utility model provides an aluminum shell single-pole cylindrical sodium ion battery, which includes a battery cell 1 and a shell 2. The top of the battery cell 1 is provided with an upper cover plate 3, and the bottom is provided with a lower cover plate 4. The shell 2 is sleeved on the outside of the battery cell 1 and the upper and lower ends are respectively sealed and welded to the upper cover plate 3 and the lower cover plate 4; wherein,

[0031] The tabs at the upper and lower ends of the battery cell 1 are full tabs, and a pole 12 is also provided on the top of the upper cover 3. The pole 12 is configured to be connected to an external power supply as the positive charged part of the battery. In addition, there is no pole on the lower cover 4 and it has a flat design.

[0032] Through the above technical solution, an upper cover plate 3 is set on the top of the battery cell 1, a lower cover plate 4 is set on the bottom, and the shell 2 is set on the outside of the battery cell 1. The upper and lower ends are sealed and welded to the upper cover plate 3 and the lower cover plate 4 respectively, changing the common sealing method to peripheral welding, which has a better sealing effect. At the same time, a pole 12 is also provided on the top of the upper cover plate 3, which serves as the positive electrode of the battery and is connected to the external power supply. In addition, there is no pole on the lower cover plate 4 and it has a flat design. The lower cover plate 3 is formed by peripheral welding with the shell 2 as a whole, and is connected to the external power supply as the negative electrode. In this way, the positive and negative poles of the single-pole structure are more obvious than those of the traditional aluminum shell bipolar column battery cell, and the structural stability is stronger. In addition, the pole ears at the upper and lower ends of the battery cell adopt full pole ears. The full pole ear structure makes the battery internal resistance smaller and the rate and cycle performance better.

[0033] like Figure 2As shown, in this embodiment, preferably, an insulating bracket 13 is provided between the upper cover 3 and the battery cell 1. Thus, the insulating bracket 13 is provided at the connection between the upper cover 3 and the battery cell 1 to prevent the upper cover 3 from being squeezed into the housing 2, causing the housing 2 to sag. At the same time, it can also fill the height gap of the battery cell 1 in the housing 2, fix the internal battery cell 1, and improve stability.

[0034] In this embodiment, a liquid injection port 14 is preferably provided on the positive electrode cover 11 of the upper cover 3 near the terminal 12 for injecting electrolyte into the battery cell 1. After the electrolyte injection is completed, a double sealing is performed using a steel ball and a sealing nail to ensure the sealing of the battery.

[0035] Furthermore, to improve the safety of the aluminum-cased, single-pole cylindrical sodium-ion battery during use, a bursting safety valve 15 is preferably provided on the upper cover plate 3 at a position symmetrical to the liquid injection port 14. Thus, when severe chemical gas production occurs within the casing 2, the bursting safety valve 15 will burst, preventing the battery from exploding and potentially causing serious consequences.

[0036] In this embodiment, if Figure 3 and Figure 4 As shown, preferably, a busbar 5 is provided on the upper cover plate 3, and the busbar 5 is connected to the positive electrode tab of the battery cell 1. In a specific embodiment, the busbar 5 is connected to the positive electrode tab of the battery cell as a current carrier by laser welding.

[0037] Similarly, if Figure 5 and Figure 6 As shown, a busbar 5 is preferably provided on the negative electrode cover 16 of the lower cover 4. The busbar 5 is connected to the negative electrode tab of the battery cell 1. In one specific embodiment, the busbar 5, as a current carrier, is connected to the negative electrode tab of the battery cell by laser welding. Unlike the upper cover 3, the lower cover 4 has no pole posts and a flat design. This undoubtedly makes the positive and negative poles of the battery more obvious, and provides greater standing stability, which is more practical for people in daily life.

[0038] Furthermore, in this embodiment, the housing 2, upper cover 3, lower cover 4, and poles 12 are all made of aluminum. Thus, the battery cell 1 is mechanically flattened and integrally formed with the winding core within the aluminum housing 2. The aluminum housing structure offers enhanced corrosion resistance, maintaining structural integrity and stability even after numerous cycles, enabling long-term, efficient power supply.

[0039] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0040] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0041] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An aluminum shell single-pole cylindrical sodium ion battery, characterized in that: The aluminum shell single-pole cylindrical sodium ion battery comprises a battery cell (1) and a shell (2); an upper cover plate (3) is provided on the top of the battery cell (1), and a lower cover plate (4) is provided on the bottom; the shell (2) is sleeved on the outside of the battery cell (1) and the upper and lower ends are respectively sealed and welded to the upper cover plate (3) and the lower cover plate (4); wherein, The tabs at the upper and lower ends of the battery cell (1) are full tabs, and a pole (12) is further provided on the top of the upper cover plate (3). The pole (12) is configured to be connected to an external power source as a positive charged part of the battery, and the lower cover plate (4) has no pole and is designed with a flat mouth.

2. The aluminum shell single-pole cylindrical sodium ion battery according to claim 1, characterized in that: An insulating bracket (13) is provided between the upper cover plate (3) and the battery core (1).

3. The aluminum shell single-pole cylindrical sodium ion battery according to claim 1, characterized in that: A liquid injection port (14) is provided on the positive electrode cover (11) of the upper cover (3) near the pole (12) for injecting electrolyte into the battery cell (1).

4. The aluminum shell single-pole cylindrical sodium ion battery according to claim 3, characterized in that: A bursting safety valve (15) is provided on the upper cover plate (3) at a position symmetrical to the liquid injection port (14).

5. The aluminum shell single-pole cylindrical sodium ion battery according to claim 1, characterized in that: A busbar (5) is provided on the upper cover plate (3), and the busbar (5) is connected to the positive electrode tab of the battery cell (1).

6. The aluminum shell single-pole cylindrical sodium ion battery according to claim 1, characterized in that: A busbar (5) is provided on the negative electrode cover (16) of the lower cover (4), and the busbar (5) is connected to the negative electrode tab of the battery cell (1).

7. The aluminum shell single-pole cylindrical sodium ion battery according to any one of claims 1 to 6, characterized in that: The housing (2), upper cover plate (3), lower cover plate (4) and pole (12) are all made of aluminum.

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