Lithium battery shell with reference pole structure

Abstract

The utility model is applicable to the technical field of lithium batteries, and particularly relates to a lithium battery shell with a reference pole structure, which comprises a lithium battery shell, a positive pole is arranged on the surface of the lithium battery shell, a mounting hole is formed in the surface of the lithium battery shell, and the reference pole structure is arranged in the mounting hole. According to the lithium battery shell, the mounting hole is formed in the lithium battery shell, and the reference pole structure is mounted in the mounting hole, so that the reference pole structure and the lithium battery shell can form an integrated structure, and the lithium battery shell not only serves as a negative electrode, but also can monitor and evaluate the voltage state in the battery more effectively; therefore, the structure of the battery cover plate is simplified, the manufacturing efficiency is improved, and the complexity and the cost of the assembly process are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium battery shell containing a reference pole structure. Background Art

[0002] As an efficient energy storage system, lithium batteries are widely used in many fields, including mobile communications, electric vehicles, portable electronic devices, etc. With the development of technology and the increase in application needs, the performance requirements for lithium batteries are also increasing, especially in terms of capacity, stability and safety. In order to meet these requirements, innovation in battery design and materials has become particularly important. Traditional lithium batteries usually contain a positive electrode, a negative electrode, an electrolyte and a separator. Among these components, the battery casing is not only used to encapsulate and protect the internal components, but also plays the role of electrical insulation and thermal management. However, traditional battery designs usually do not directly integrate functions for monitoring and regulating the battery status, which limits the precise control and real-time monitoring of battery performance.

[0003] In order to improve the performance and safety of lithium batteries, a lithium battery housing with a reference electrode structure has been developed. This design integrates a reference electrode in the battery housing, making it possible to measure the electrode potential directly inside the battery. The reference electrode structure allows for more accurate monitoring of the battery's operating status, such as the battery's charging and discharging process, as well as the state of the chemical reaction inside the battery.

[0004] In the prior art, there is a lithium battery cover plate containing a reference pole structure, such as patent number CN211700344U. The lithium battery cover plate containing a reference pole structure includes an electrode column sealed and insulated from the cover plate body, and a liquid injection hole is provided inside the electrode column. Although such a design has the advantages of being able to effectively monitor the positive and negative voltage values ​​of the battery, as well as the voltage value between the reference electrode and the negative electrode, and timely determine whether abnormal conditions such as lithium deposition occur inside the battery cell, such a structure still needs to independently install the battery cover plate on the battery housing during actual use, and then set a reference electrode structure on the cover plate. This results in a low degree of integration between the reference electrode structure and the battery housing, which is not conducive to the manufacturing efficiency of the lithium battery, and the safety level is not high enough. In this regard, the utility model provides a lithium battery housing containing a reference pole structure to solve the above technical problems. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a lithium battery housing containing a reference pole structure, aiming to solve the technical problems mentioned in the background technology.

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

[0007] A lithium battery housing containing a reference pole structure, comprising a lithium battery housing, a positive pole being arranged on the surface of the lithium battery housing, a mounting hole being opened on the surface of the lithium battery housing, and a reference pole structure being arranged inside the mounting hole;

[0008] The reference pole structure comprises an insulating sealing ring, an electrode pole and an electrode terminal, wherein the insulating sealing ring is arranged inside the mounting hole, the electrode pole is arranged inside the insulating sealing ring, and the electrode terminal is arranged inside the electrode pole.

[0009] Furthermore, the electrode column is an integrated structure, and the upper diameter of the electrode column is larger than the lower diameter.

[0010] Furthermore, an embedding notch or an embedding protrusion is provided on the inner side of the electrode column.

[0011] Furthermore, the bottom contact surface between the electrode column and the insulating sealing ring is a plane, and the electrode column, the insulating sealing ring, the electrode terminal and the mounting hole are all on the same axis.

[0012] Furthermore, the electrode column and the lithium battery housing are fixedly connected by crimping or riveting.

[0013] Furthermore, the electrode terminal and the electrode column are fixedly connected by welding.

[0014] Furthermore, the electrode column and the electrode terminal are components made of copper alloy, aluminum alloy or stainless steel.

[0015] The utility model provides a lithium battery shell with a reference pole structure, which has the following beneficial effects:

[0016] By opening a mounting hole on the lithium battery shell and installing a reference pole structure inside the mounting hole, the reference pole structure and the lithium battery shell can form an integrated structure, so that the lithium battery shell not only acts as a negative electrode, but also can more effectively monitor and evaluate the voltage state inside the battery, thereby simplifying the structure of the battery cover, improving manufacturing efficiency, and reducing the complexity and cost of the assembly process. In addition, the newly added reference pole structure can monitor the potential between the poles of the battery more accurately, can reflect the battery status in a timely manner, help optimize the charging strategy, prevent overcharging and unbalanced charging, and the combination of accurate potential monitoring and reliable structural design can effectively prevent risks such as battery lithium plating, and significantly improve the safety of the battery during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a lithium battery shell containing a reference pole structure.

[0018] Figure 2The present invention is a structural schematic diagram of a reference pole structure in a lithium battery shell containing a reference pole structure in a disassembled state.

[0019] Figure 3 A lithium battery shell having a reference pole structure Figure 2 Enlarged view of point A.

[0020] Figure 4 It is a front cross-sectional view of a lithium battery casing containing a reference pole structure.

[0021] Figure 5 A lithium battery shell having a reference pole structure Figure 4 Enlarged view of point B.

[0022] In the figure: 1. lithium battery shell; 2. positive electrode column; 3. reference electrode column structure; 31. electrode terminal; 32. electrode column; 33. insulating sealing ring; 4. mounting hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0025] like Figure 1-Figure 5 As shown, a lithium battery housing with a reference pole structure provided by an embodiment of the utility model comprises a lithium battery housing 1, a positive pole 2 is arranged on the surface of the lithium battery housing 1, the positive pole 2 is insulated and connected to the lithium battery housing 1, a mounting hole 4 is opened on the surface of the lithium battery housing 1, and a reference pole structure 3 is arranged inside the mounting hole 4;

[0026] The reference pole structure 3 includes an insulating sealing ring 33, an electrode column 32 and an electrode terminal 31, and the insulating sealing ring 33 is arranged inside the mounting hole 4, the electrode column 32 is arranged inside the insulating sealing ring 33, and the electrode terminal 31 is arranged inside the electrode column 32. The bottom contact surface of the electrode column 32 and the insulating sealing ring 33 is a plane, and the electrode column 32, the insulating sealing ring 33, the electrode terminal 31 and the mounting hole 4 are all on the same axis. The purpose of setting this structure is to ensure the stability of the overall structure of the reference pole structure 3;

[0027] By providing an insulating sealing ring 33 between the electrode column 32 and the lithium battery housing 1 , the entire reference electrode structure 3 and the lithium battery housing 1 can be in an insulated connection state.

[0028] In one embodiment of the utility model, when installing the reference pole structure 3 on the lithium battery shell 1, the electrode column 32 is first passed through the insulating sealing ring 33 and inserted from the upper part of the lithium battery shell 1, and then the insulating sealing ring 33 is passed through the bottom of the electrode column 32, and the electrode column 32 is fixed to the lithium battery shell 1 through a riveting process, so that the electrode column 32 and the lithium battery shell 1 can achieve insulation and sealing effects. After the electrode column 32 is fixed to the lithium battery shell 1, the reference pole structure 3 formed can be connected to the reference electrode lead wire or the pole ear by welding, and the outside can be simply connected to the electrode terminal by external welding of the pole ear.

[0029] Preferably, the electrode column 32 is an integrated structure, and the upper diameter of the electrode column 32 is larger than the lower diameter, so that the electrode column 32 can be more stably arranged inside the mounting hole 4.

[0030] Preferably, an engaging notch or an engaging protrusion is provided on the inner side of the electrode column 32 , so that the electrode terminal 31 can be more firmly installed inside the electrode column 32 .

[0031] Preferably, the electrode column 32 and the lithium battery housing 1 are fixedly connected by crimping or riveting.

[0032] Preferably, the electrode terminal 31 and the electrode column 32 are fixedly connected by welding. Specifically, spot welding or laser welding can be used for fixed connection to ensure that the electrode terminal 31 and the electrode column 32 have high electrical connection performance and mechanical strength.

[0033] Preferably, the electrode column 32 and the electrode terminal 31 may be made of copper, copper alloy, aluminum, aluminum alloy or stainless steel.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium battery housing containing a reference pole structure, comprising a lithium battery housing (1), characterized in that: The surface of the lithium battery housing (1) is provided with a positive pole (2), the surface of the lithium battery housing (1) is provided with a mounting hole (4), and a reference pole structure (3) is provided inside the mounting hole (4); The reference pole structure (3) comprises an insulating sealing ring (33), an electrode pole (32) and an electrode terminal (31), wherein the insulating sealing ring (33) is arranged inside the mounting hole (4), the electrode pole (32) is arranged inside the insulating sealing ring (33), and the electrode terminal (31) is arranged inside the electrode pole (32).

2. A lithium battery casing containing a reference pole structure according to claim 1, characterized in that: The electrode column (32) is an integrated structure, and the upper diameter of the electrode column (32) is larger than the lower diameter.

3. A lithium battery casing containing a reference pole structure according to claim 1, characterized in that: The inner side of the electrode column (32) is provided with an embedding notch or an embedding protrusion.

4. A lithium battery casing containing a reference pole structure according to claim 1, characterized in that: The bottom contact surface between the electrode column (32) and the insulating sealing ring (33) is a plane, and the electrode column (32), the insulating sealing ring (33), the electrode terminal (31) and the mounting hole (4) are all on the same axis.

5. The lithium battery casing containing a reference pole structure according to claim 1, characterized in that: The electrode column (32) and the lithium battery housing (1) are fixedly connected by crimping or riveting.

6. A lithium battery casing containing a reference pole structure according to claim 1, characterized in that: The electrode terminal (31) and the electrode column (32) are fixedly connected by welding.

7. A lithium battery casing containing a reference pole structure according to claim 1, characterized in that: The electrode column (32) and the electrode terminal (31) are components made of copper alloy, aluminum alloy or stainless steel.

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