Cylindrical battery structure and sodium ion battery thereof

Abstract

The utility model relates to a cylindrical battery structure and a sodium ion battery thereof, the cylindrical battery structure comprises a battery shell, a battery cell is arranged in the battery shell, one end part of the wound battery cell is connected with the battery shell through an electrode connecting piece, and the connecting mode is tin soldering; the utility model has the advantages of reasonable structure, open circuit formed by high temperature, prevention of further out-of-control of the battery, and high safety factor.

Description

Technical Field

[0001] This utility model belongs to the field of sodium-ion battery technology, specifically relating to a cylindrical battery structure and its sodium-ion battery. Background Technology

[0002] Since the beginning of the 21st century, people have increasingly placed their hopes on advancements in new energy technologies to alleviate the current shortage of non-renewable resources such as oil. Lithium-ion batteries have gained particular favor due to their high energy density and compliance with environmental requirements. However, the lithium element required for lithium-ion batteries is not abundant in the Earth's crust. With the rapid development of the lithium-ion battery industry, lithium has become a bottleneck for its development. Solving the lithium source problem has become the biggest issue for this industry, leading to a sharp rise in the price of raw materials for lithium-ion batteries, which has created enormous pressure on the entire industrial chain. Sodium, on the other hand, is abundant in the Earth's crust, and sodium-ion batteries have excellent performance. Moreover, sodium-ion batteries have essentially the same manufacturing process as lithium-ion batteries, providing a good industrial foundation. However, sodium-ion batteries have a lower energy density, which needs to be increased. But as the energy density increases, safety performance also decreases, posing safety risks to users. Therefore, it is essential to provide a cylindrical battery structure and its sodium-ion battery with a reasonable structure, high-temperature circuit breaking, prevention of further battery runaway, and a high safety factor. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cylindrical battery structure and its sodium-ion battery with reasonable structure, high temperature circuit breaking, prevention of further battery runaway, and high safety factor.

[0004] The purpose of this utility model is achieved as follows: a cylindrical battery structure, which includes a battery casing, a battery cell disposed inside the battery casing, and one end of the wound battery cell being connected to the battery casing through an electrode connecting piece, the connection method being soldering.

[0005] The battery casing is a metal casing, and a bottom cover is provided at one end of the battery casing, on which electrode terminals are installed.

[0006] The battery casing is made of aluminum or steel.

[0007] The top of the battery cell is connected to the electrode terminal via an electrode connecting piece.

[0008] The bottom of the battery cell is connected to the electrode terminals via an electrode connecting piece.

[0009] When the battery casing is made of aluminum, the positive electrode of the battery cell is soldered to the electrode terminal; when the battery casing is made of steel, the negative electrode of the battery cell is soldered to the electrode terminal.

[0010] The electrode connecting piece is a metal strip, which consists of two parts and the two parts of the metal strip are respectively soldered to the battery cell and the electrode terminal.

[0011] An internal groove is provided on the battery casing at the other end opposite to the bottom cover.

[0012] A sodium-ion battery employing the cylindrical battery structure described above.

[0013] The beneficial effects of this utility model are as follows: This utility model is a cylindrical battery structure and its sodium-ion battery. In use, the battery casing of this utility model is made of metal, and the wound battery cell is connected to the casing by soldering with metal strips. When the battery is at risk of safety, the high temperature generated melts the solder. After the solder melts, the electrode connection is broken, forming an open circuit, thereby protecting the battery from further loss of control and greatly improving the overall safety factor of the battery. This utility model has the advantages of reasonable structure, high temperature circuit breaking, prevention of further battery loss of control, and high safety factor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a cylindrical battery and its sodium-ion battery according to the present invention. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the overall structure of a cylindrical battery and its sodium-ion battery according to the present invention. Figure 2 .

[0016] Figure 3 This is a partial cross-sectional view of a cylindrical battery structure and its sodium-ion battery according to the present invention.

[0017] In the diagram: 1. Battery casing; 2. Battery cell; 3. Bottom cover; 4. Electrode terminals; 5. Electrode connecting piece; 6. Internal groove. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. Example

[0019] like Figure 1 As shown, a cylindrical battery structure includes a battery housing 1, inside which a battery cell 2 is disposed. One end of the wound battery cell 2 is connected to the battery housing 1 via an electrode connecting piece 5, and the connection method is soldering.

[0020] In this invention, the sodium-ion cylindrical battery casing is made of aluminum or steel. The top of the wound battery cell is connected to the casing by a metal strip, which consists of two parts that are connected together by soldering.

[0021] One end of the electrode (positive or negative) is connected to the battery cover via a metal strip, which is divided into two parts and connected by solder. When the battery is at risk of safety, the high temperature generated melts the solder, and the electrode connection is broken after melting, forming an open circuit, thereby protecting the battery from further loss of control.

[0022] This utility model relates to a cylindrical battery structure and its sodium-ion battery. In use, the battery casing of this utility model is made of metal, and the wound battery cell is connected to the casing by soldering with metal strips. When the battery encounters a safety risk, the generated high temperature melts the solder. After the solder melts, the electrode connection is broken, forming an open circuit, thereby protecting the battery from further loss of control and greatly improving the overall safety factor of the battery. This utility model has the advantages of reasonable structure, high temperature circuit breaking, prevention of further battery loss of control, and high safety factor. Example

[0023] like Figure 2-3 As shown, a cylindrical battery structure and its sodium-ion battery are disclosed. The structure includes a battery housing 1, and a battery cell 2 is disposed inside the battery housing 1. One end of the wound battery cell 2 is connected to the battery housing 1 through an electrode connecting piece 5, and the connection method is soldering.

[0024] In this invention, the sodium-ion cylindrical battery casing is made of aluminum or steel, and the bottom of the wound battery cell is connected to the casing by a metal strip, which is soldered.

[0025] One end of the electrode (positive or negative) is soldered to the bottom of the battery casing with tin through a metal sheet. When the battery is at risk of safety, the high temperature generated melts the tin, and part of the melted tin flows into the internal groove. After the tin melts, the electrode connection is broken, forming an open circuit, thereby protecting the battery from further loss of control.

[0026] This utility model relates to a cylindrical battery structure and its sodium-ion battery. In use, the battery casing of this utility model is made of metal, and the wound battery cell is connected to the casing by soldering with metal strips. When the battery encounters a safety risk, the generated high temperature melts the solder. After the solder melts, the electrode connection is broken, forming an open circuit, thereby protecting the battery from further loss of control and greatly improving the overall safety factor of the battery. This utility model has the advantages of reasonable structure, high temperature circuit breaking, prevention of further battery loss of control, and high safety factor. Example

[0027] A sodium-ion battery employing the cylindrical battery structure described above.

[0028] In this invention, the sodium-ion battery cell made from the above structure is manufactured into a sodium-ion battery through processes such as baking, liquid injection, formation, and capacity testing.

Claims

1. A cylindrical battery structure, comprising a battery casing, characterized in that: The battery casing contains a battery cell, and one end of the wound battery cell is connected to the battery casing via an electrode connecting piece, and the connection method is soldering. The top of the battery cell is connected to the electrode terminals via an electrode connecting piece; The battery casing is made of aluminum or steel. When the battery casing is made of aluminum, the positive electrode of the battery cell is soldered to the electrode terminal; when the battery casing is made of steel, the negative electrode of the battery cell is soldered to the electrode terminal.

2. The cylindrical battery structure according to claim 1, characterized in that: The battery casing is a metal casing, and a bottom cover is provided at one end of the battery casing, on which electrode terminals are installed.

3. The cylindrical battery structure according to claim 2, characterized in that: The bottom of the battery cell is connected to the electrode terminals via an electrode connecting piece.

4. A cylindrical battery structure according to claim 1 or 2, characterized in that: The electrode connecting piece is a metal strip, which consists of two parts and the two parts of the metal strip are respectively soldered to the battery cell and the electrode terminal.

5. A cylindrical battery structure according to claim 2, characterized in that: An internal groove is provided on the battery casing at the other end opposite to the bottom cover.

6. A sodium-ion battery, characterized in that: The cylindrical battery structure is adopted as described in any one of claims 1-5.

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