Electrode housing for online optical monitoring, preparation method, and battery assembly

Abstract

The present application relates to the technical field of batteries, and in particular to an electrode housing for online optical monitoring, a preparation method, and a battery assembly. The electrode housing for online optical monitoring comprises a sleeve, a lens assembly, and an electrode conductor; the lens assembly comprises a first support and a lens body, the first support is sealedly embedded in one end of the sleeve and is electrically connected to the sleeve, and the lens body is sealedly fixed on the first support; and the electrode conductor is embedded in the sleeve and is electrically connected to the sleeve. The electrode housing for online optical monitoring, the preparation method, and the battery assembly provided by the present application realize direct optical monitoring of the internal state of a battery cell, and are suitable for a variety of optical monitoring means; by means of the sealed connection of the lens body, the first support, and the sleeve, the electrode housing has good airtightness, ensuring the normal operation of a battery cell, and realizing non-interference measurement; the present application is suitable for the existing battery cell production process, and avoids the increase in costs caused by process modification; and the present application is suitable for existing electric devices, charging / discharging devices, etc.

Description

Electrode housing, preparation method, and battery assembly for online optical monitoring

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application No. 202410787835X, filed on June 18, 2024, entitled “Electrode housing, preparation method and battery assembly for online optical monitoring”, which is incorporated herein by reference in its entirety. Technical Field

[0003] This application relates to the field of battery technology, and in particular to an electrode shell, preparation method and battery assembly for online optical monitoring. Background Technology

[0004] Within a single battery cell, the evolution of components such as the positive electrode, negative electrode, separator, and electrolyte spans the entire lifecycle of the cell. Direct, online monitoring of the internal state of a battery cell under operating / in-situ conditions is of great significance for studying the working and thermal runaway mechanisms of battery cells, achieving cell-level safety early warning, and optimizing battery cell design.

[0005] Currently, there are four main types of technical means to accomplish this type of monitoring:

[0006] 1. Radiation imaging: using neutrons, X-rays, etc. to see through the internal state of individual battery cells in real time.

[0007] 2. Extract the internal substances of the battery cell to the outside for analysis; for example, drill a hole in the negative electrode of a cylindrical battery cell to collect the internal gas; or, use a hollow optical fiber to extract the electrolyte inside a pouch cell.

[0008] 3. Implant sensors inside the battery cell; for example, drill holes in the bottom of the finished cylindrical battery cell and insert a thin fiber optic sensor to monitor the internal temperature and pressure of the battery cell in real time.

[0009] 4. A transparent viewing mirror is installed on the outer casing of the battery cell, and the internal state of the battery cell is monitored by optical means such as human eye, camera, and Raman spectroscopy.

[0010] The four existing technical methods described above are insufficient for direct, online monitoring of the internal state of mainstream cylindrical battery cells. Specifically: the first method introduces potential radiation hazards and can only obtain geometric information (such as electrode shape) within the battery cell, making it difficult to acquire other information. The second method can lead to abnormal flow of substances within the battery cell, interfering with its operation. The third and fourth methods, when applied to mainstream cylindrical battery cells, easily compromise their sealing when modifying the casing, allowing external substances such as oxygen and moisture to intrude, as well as causing loss and deterioration of internal components, thus interfering with the battery cell's operation.

[0011] The fourth method, which involves placing a transparent viewing mirror on the outer casing, if successfully applied to mainstream cylindrical battery cells, will form a new monitoring paradigm. It will enable the extraction of rich optical information from within these cells, greatly deepening our understanding of their state evolution. However, overcoming the aforementioned problems requires appropriate modifications to the casing of these battery cells to ensure good sealing even after the viewing mirror is installed, with minimal structural changes, allowing for direct, online monitoring of the internal state of mainstream cylindrical battery cells using non-radioactive, non-interference optical methods.

[0012] Summary of the Invention

[0013] This application provides an electrode shell, a preparation method, and a battery assembly for online optical monitoring, in order to solve the problem that the existing technology lacks a suitable improvement scheme for the shell of the mainstream cylindrical battery cell, which cannot well support direct, online optical monitoring of the internal state.

[0014] This application provides an electrode housing for online optical monitoring, comprising:

[0015] Sleeve;

[0016] A lens assembly, comprising: a first bracket and a lens body, wherein the first bracket is sealed and embedded at one end of the sleeve and electrically connected to the sleeve, and the lens body is sealed and fixed on the first bracket;

[0017] An electrode conductor is embedded in the sleeve and electrically connected to the sleeve.

[0018] According to the electrode housing for online optical monitoring provided in this application, the electrode conductor includes: a second support, a conductive post, and a conductive beam. The conductive post is electrically connected to the second support through the conductive beam, and the second support is embedded in the sleeve and electrically connected to the sleeve.

[0019] According to the electrode housing for online optical monitoring provided in this application, the first bracket is formed with an annular boss, which protrudes at least partially from both sides of the lens body.

[0020] According to the electrode housing for online optical monitoring provided in this application, the sleeve is a cylindrical sleeve, the first bracket and the second bracket are both annular brackets, and the annular bracket is adapted to be embedded in the cylindrical sleeve.

[0021] According to the electrode housing for online optical monitoring provided in this application, the conductive post is located at the geometric center of the second bracket, and the conductive beams are circumferentially distributed with the conductive post as the center.

[0022] According to the electrode housing for online optical monitoring provided in this application, the lens body is made of borosilicate glass or sapphire.

[0023] According to the electrode housing for online optical monitoring provided in this application, the electrode conductor is a negative conductor or a positive conductor.

[0024] This application also provides a method for preparing an electrode shell for online optical monitoring, comprising:

[0025] The lens assembly, electrode conductor, and sleeve were fabricated separately.

[0026] An electrode conductor and a lens assembly are fixed sequentially at one end of the sleeve, and the lens assembly and the electrode conductor are electrically connected to the sleeve respectively.

[0027] According to the method for preparing the electrode shell for online optical monitoring provided in this application, the step of preparing the lens assembly specifically includes:

[0028] A lens body is made of a light-transmitting material, a first support is made of a conductive material, and the lens body is fixed on the first support to form a lens assembly.

[0029] The step of sequentially fixing the electrode conductor and the lens assembly to one end of the sleeve also includes:

[0030] The first bracket is sealed to the sleeve.

[0031] This application also provides a battery assembly, including: a cap, a battery cell, and the electrode housing for online optical monitoring described above, wherein the battery cell is electrically connected to the cap and the electrode housing respectively, and the cap is insulated from one end of the electrode housing.

[0032] This application provides an electrode shell for online optical monitoring and its preparation method. The electrode shell for online optical monitoring includes a sleeve, a lens assembly, and an electrode conductor. The lens assembly includes a first support and a lens body. The first support is sealed and embedded in one end of the sleeve and electrically connected to the sleeve. The lens body is sealed and fixed on the first support. The electrode conductor is embedded in the sleeve and electrically connected to the sleeve. The electrode shell for online optical monitoring provided by this application, due to the presence of the lens body, enables direct optical monitoring of the internal state of a battery cell. By rationally selecting the material of the lens body, its transmission spectrum can be changed, thus making it compatible with various optical monitoring methods such as human eye, camera, Raman spectroscopy, and infrared thermal imaging. The sealed connection of the lens body, the first support, and the sleeve provides good airtightness, ensuring the normal operation of the battery cell and achieving non-interference measurement. It is compatible with existing battery cell manufacturing processes, avoiding cost increases caused by process modifications. It also has good compatibility with existing electrical equipment and charging / discharging equipment.

[0033] The battery assembly provided in this application has the same advantages as described above because it includes the electrode housing for online optical monitoring as described in this application. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 is a schematic diagram of the structure of an electrode housing for online optical monitoring provided in one embodiment of this application.

[0036] Figure 2 is a schematic longitudinal section of an electrode housing for online optical monitoring provided in one embodiment of this application.

[0037] Figure 3 is an exploded view of an electrode housing for online optical monitoring provided in one embodiment of this application.

[0038] Figure 4 is a schematic diagram of the sleeve provided in one embodiment of this application.

[0039] Figure 5 is a schematic diagram of the lens assembly provided in one embodiment of this application.

[0040] Figure 6 is a schematic diagram of the structure of an electrode conductor provided in one embodiment of this application.

[0041] Figure label:

[0042] 1: Sleeve; 2: Lens assembly; 21: First support; 22: Lens body; 23: Annular boss; 3: Electrode conductor; 31: Second support; 32: Conductive post; 33: Conductive beam. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0046] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] The electrode housing for online optical monitoring according to this application is described below with reference to Figures 1-6. The electrode housing for online optical monitoring includes: a sleeve 1, a lens assembly 2, and an electrode conductor 3.

[0049] The lens assembly 2 includes a first bracket 21 and a lens body 22. The first bracket 21 is sealed and embedded at one end of the sleeve 1 and electrically connected to the sleeve 1. The lens body 22 is sealed and fixed on the first bracket 21. The electrode conductor 3 is embedded in the sleeve 1 and electrically connected to the sleeve 1.

[0050] It should be understood that the electrode housing provided in this application for online optical monitoring can be either a negative electrode housing or a positive electrode housing as needed. Generally, in accordance with the conventions of the art, the electrode housing is expected to be primarily used as a negative electrode housing, that is, the electrode conductor 3 is a negative electrode conductor. In the following embodiments, a negative electrode housing is used as an example for description.

[0051] Specifically, the sleeve 1 is open at both ends, serving as the outer wall of the lens assembly 2 and the electrode conductor 3, into which the battery cell can be installed. The lens assembly 2 and the electrode conductor 3 are fixedly installed at one end of the sleeve 1, while the battery cell can be installed from the other end of the sleeve 1. The lens assembly 2 is located at one end of the sleeve 1, and the lens body 22 is made of a suitable light-transmitting material to be compatible with various optical monitoring methods such as human eye, camera, Raman spectroscopy, and infrared thermal imaging. The lens body 22, the first bracket 21, and the sleeve 1 are all sealed together, which satisfies the assembly of the lens body 22 and ensures the airtightness of the outer shell, thereby ensuring the normal operation of the battery cell. The electrode conductor 3 is used for electrical connection with the tabs of the battery cell, and functions as a negative or positive conductor depending on the polarity of the connected tabs. In addition, the position of the lens assembly 2 can be adjusted along the axial direction of the sleeve 1, and the end faces of the two can be flush or not, depending on the actual application requirements.

[0052] The lens body 22, the first bracket 21 and the sleeve 1 can be sealed together by means of laser welding, high-temperature sintering or brazing to ensure airtightness.

[0053] This embodiment, by setting a lens assembly 2 at the end of the sleeve 1, allows for direct optical monitoring of the internal state of the battery cell using various optical monitoring methods. By rationally selecting the material of the lens body 22, its transmission spectrum can be changed, thus making it compatible with various optical monitoring methods such as the human eye, camera, Raman spectroscopy, and infrared thermal imaging. It has good airtightness, ensuring the normal operation of the battery cell and enabling non-interference measurement. It is compatible with existing battery cell manufacturing processes, avoiding the cost of process modification from an economic perspective. The sleeve 1 can be modified from existing cylindrical battery cell shells, and the shape of the sleeve 1 is the mainstream cylindrical shape, which is well compatible with existing electrical equipment, charging and discharging equipment, etc.

[0054] This application provides an electrode housing for online optical monitoring, comprising: a sleeve 1, a lens assembly 2, and an electrode conductor 3; the lens assembly 2 includes: a first support 21 and a lens body 22, the first support 21 being sealed and embedded in one end of the sleeve 1 and electrically connected to the sleeve 1, and the lens body 22 being sealed and fixed on the first support 21; the electrode conductor 3 is embedded in the sleeve 1 and electrically connected to the sleeve 1. The electrode housing for online optical monitoring provided by this application, due to the presence of the lens body 22, allows for direct optical monitoring of the internal state of a battery cell; by reasonably selecting the material of the lens body 22, its transmission spectrum can be changed, thus being compatible with various optical monitoring methods such as the human eye, cameras, Raman spectroscopy, and infrared thermal imaging; through the sealed connection of the lens body 22, the first support 21, and the sleeve 1, it has good airtightness, ensuring the normal operation of the battery cell and achieving non-interference measurement; it is compatible with existing battery cell manufacturing processes, avoiding cost increases caused by process modifications; and it is also well compatible with existing electrical equipment, charging and discharging equipment, etc.

[0055] In one embodiment of this application, as shown in FIG6, the electrode conductor 3 includes: a second support 31, a conductive post 32, and a plurality of conductive beams 33. The conductive post 32 is electrically connected to the second support 31 through the plurality of conductive beams 33. The second support 31 is embedded in the sleeve 1 and electrically connected to the sleeve 1, and the second support 31 is in close contact with the first support 21. Specifically, the second support 31 is supported on the inner wall of the sleeve 1 and can be fixed inside the sleeve 1 by welding, so that it is in close contact with the first support 21. The conductive post 32 is used for electrical connection with the electrode tab of the battery cell. The conductive post 32 is electrically connected to the second support 31 and the sleeve 1 through the conductive beams 33. Furthermore, the way the second bracket 31 and the first bracket 21 are fitted together enables a direct electrical connection between the electrode conductor 3 and the lens assembly 2, serving as a backup electrical connection method: specifically, if there is poor contact between the electrode conductor 3 and the sleeve 1, as long as there is a good electrical connection between the electrode conductor 3 and the lens assembly 2, and between the lens assembly 2 and the sleeve 1, the entire electrode shell will still have a good electrical connection.

[0056] In one embodiment of this application, as shown in FIG5, the first bracket 21 has an annular protrusion 23, which protrudes at least partially from both sides of the lens body 22. In this embodiment, the outer contour of the first bracket 21 protrudes from the lens body 22, which not only serves to fix and install the lens body 22, but also reduces the possibility of the lens body 22 being damaged by external mechanical forces. Specifically, as shown in FIG4, the outer edge of the first bracket 21 has an annular protrusion 23, which extends toward both sides of the lens body 22. The annular protrusion 23 has a certain supporting and protective function, reducing the chance of the lens body 22 directly contacting the outside world, thereby reducing the possibility of it being damaged by mechanical forces.

[0057] In one embodiment of this application, the sleeve 1 is a cylindrical sleeve 1, and the first bracket 21 and the second bracket 31 are both annular brackets, and the annular brackets are adapted to be embedded inside the cylindrical sleeve 1. In this embodiment, a cylindrical sleeve 1 structure is adopted, and correspondingly, the first bracket 21 and the second bracket 31 are also annular brackets. The size of the annular brackets matches the size of the cylindrical sleeve 1, ensuring that the annular brackets can be embedded inside the cylindrical sleeve 1. Of course, depending on different cell / battery structures, other shapes of sleeve 1 and bracket structures can also be used.

[0058] In one embodiment of this application, the conductive post 32 is located at the geometric center of the second support 31, and multiple conductive beams 33 are circumferentially distributed with the conductive post 32 as the center. In embodiments using multiple conductive beams, conductivity is guaranteed; furthermore, the structure exhibits good stability when multiple conductive beams 33, conductive posts 32, and the second support 31 are spot-welded together. In this embodiment, the conductive post 32 is located at the geometric center of the second support 31. When the second support 31 is an annular support, the conductive post 32 is located at the center of the second support 31, and multiple conductive beams 33 are arranged circumferentially. Preferably, when multiple conductive beams 33 are arranged, the included angle between adjacent conductive beams 33 is the same. For example, as shown in Figure 5, three conductive beams 33 are evenly arranged, with an included angle of 120 degrees between each pair of adjacent conductive beams 33. Since the conductive post 32 is located at the center of the second support 31, it facilitates electrical connection with the battery cell.

[0059] In one embodiment of this application, the lens body 22 is made of borosilicate glass or sapphire. It should be understood that, depending on the optical monitoring method chosen, other light-transmitting materials may also be used. The borosilicate glass in this embodiment is hard glass, a special glass material with low expansion coefficient, high temperature resistance, high strength, high hardness, high light transmittance, and high chemical stability; the sapphire in this embodiment is mainly composed of aluminum oxide, a special material with high light transmittance, excellent mechanical properties, and high chemical stability.

[0060] In one embodiment of this application, the electrode conductor 3 is a negative electrode conductor or a positive electrode conductor. Depending on the specific battery design, the electrode conductor 3 is electrically connected to the negative or positive electrode tab of the battery cell, thus functioning as a negative or positive electrode conductor.

[0061] This application also provides a method for preparing an electrode shell for online optical monitoring. The preparation method specifically includes the following steps:

[0062] S1. Prepare lens assembly 2, electrode conductor 3 and sleeve 1 respectively;

[0063] S2. Fix the electrode conductor 3 and the lens assembly 2 in sequence at one end of the sleeve 1, and make the lens assembly 2 and the electrode conductor 3 electrically connected to the sleeve 1 respectively.

[0064] The lens assembly 2, electrode conductor 3, and sleeve 1 can be independent structures, manufactured separately and then assembled, or they can be integrally formed and then assembled with another component, or all three can be integrally formed. The sleeve 1 can be a newly purchased existing sleeve, or it can be modified from an existing pipe fitting. For example, a pipe fitting of appropriate material and size with one end open can be selected, and the sealing end face can be cut off along its cross-section to form the sleeve 1.

[0065] In this preparation method, the sleeve 1 can be made from an existing cylindrical battery cell shell. The negative electrode shell of an existing cylindrical battery cell can be used, with its sealed end face cut off to form a sleeve 1 with both ends open. The prepared lens assembly 2 and electrode conductor 3 are installed at one end of the sleeve 1. Direct optical monitoring of the battery cell's interior can be achieved through the lens assembly 2. The electrode conductor 3 can be made of 304 stainless steel and formed using a cutting method. The sleeve 1 prepared according to this method is predominantly cylindrical, thus ensuring good compatibility with existing electrical equipment and charging / discharging devices.

[0066] This application provides a method for preparing an electrode shell for online optical monitoring, which enables direct optical monitoring of the internal state of a battery cell. By rationally selecting the material of the lens body 22, its transmission spectrum can be changed, thus making it compatible with various optical monitoring methods such as human eye, camera, Raman spectroscopy, and infrared thermal imaging. Through the sealed connection of the lens body 22, the first support 21, and the sleeve 1, it has good airtightness, ensuring the normal operation of the battery cell and realizing non-interference measurement. It is compatible with existing battery cell manufacturing processes, avoiding cost increases caused by process modification. It is also well compatible with existing electrical equipment, charging and discharging equipment, etc.

[0067] In one embodiment of this application, the step of preparing the lens assembly 2 in step S1 specifically includes: taking borosilicate glass to make a lens body 22, taking steel to make a first support 21, and fixing the lens body 22 onto the first support 21 to form the lens assembly 2; in the step of fixing the electrode conductor 3 and the lens assembly 2 sequentially to one end of the sleeve 1 in step S3, this step further includes: sealing the first support 21 and the sleeve 1 through processes such as laser welding. In this embodiment, the lens body 22 can also be made of other materials. In this embodiment, the first support 21, the lens body 22, and the sleeve 1 are sealed together through processes such as high-temperature sintering, brazing, and laser welding to improve the airtightness of the electrode shell and ensure the normal operation of the battery cell.

[0068] This application also provides a battery assembly. The battery assembly includes: a cap, a battery cell, and an electrode shell for online optical monitoring as described in the above embodiments of this application. The battery cell is electrically connected to both the cap and the electrode shell, and the cap is insulated from one end of the electrode shell.

[0069] The battery assembly provided in this application has the same advantages as described above because it includes the electrode housing for online optical monitoring in the above embodiments of this application.

[0070] Taking the electrode shell used for online optical monitoring in this application embodiment as an example (hereinafter referred to as "negative electrode shell"), the typical cylindrical battery cell production process includes a negative electrode spot welding process, that is, spot welding the negative electrode tab of the cell to the bottom surface of the shell. Since the bottom surface of the negative electrode shell in this embodiment is provided with a lens body 22 (which, in terms of its material properties, is generally non-conductive and not resistant to mechanical impact), a negative electrode conductor is provided to be compatible with the negative electrode spot welding process.

[0071] The aforementioned negative electrode shell is used in the negative electrode spot welding process, and the specific operation is as follows:

[0072] Step 1: Insert the cylindrical battery cell into the sleeve 1 along the busbar direction of the negative electrode shell, and make the negative electrode tab of the battery cell contact the conductive post 32.

[0073] Step 2: Insert the welding needle into the center hole of the battery cell, place the bottom surface of the negative electrode shell on the spot welding machine base, and perform the spot welding process.

[0074] The core of the negative electrode spot welding process is the combined effect of the heat generated by the welding current and the mechanical pressure of the welding needle to form a weld point. When the negative electrode shell is used in this process, its metal part forms a circuit, allowing the welding current to pass between the negative electrode tab and the conductive post 32; the pressure of the welding needle is also applied to the negative electrode tab and the conductive post 32. As a result, a weld point is formed between the negative electrode tab and the conductive post 32, making the negative electrode tab and the negative electrode shell conductive.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electrode housing for online optical monitoring, comprising: Sleeve (1); Lens assembly (2), the lens assembly (2) includes: a first bracket (21) and a lens body (22), the first bracket (21) is sealed and embedded in one end of the sleeve (1) and electrically connected to the sleeve (1), and the lens body (22) is sealed and fixed on the first bracket (21); Electrode conductor (3) is embedded in the sleeve (1) and electrically connected to the sleeve (1).

2. The electrode housing for online optical monitoring according to claim 1, wherein, The electrode conductor (3) includes: a second support (31), a conductive post (32) and a conductive beam (33). The conductive post (32) is electrically connected to the second support (31) through the conductive beam (33). The second support (31) is embedded in the sleeve (1) and electrically connected to the sleeve (1).

3. The electrode housing for online optical monitoring according to claim 1, wherein, The first bracket (21) is formed with an annular boss (23), which protrudes at least partially from both sides of the lens body (22).

4. The electrode housing for online optical monitoring according to claim 2, wherein, The sleeve (1) is a cylindrical sleeve (1), and the first bracket (21) and the second bracket (31) are both annular brackets, and the annular brackets are adapted to be embedded in the cylindrical sleeve (1).

5. The electrode housing for online optical monitoring according to claim 2, wherein, The conductive post (32) is located at the geometric center of the second support (31), and the conductive beam (33) is circumferentially distributed with the conductive post (32) as the center.

6. The electrode housing for online optical monitoring according to claim 1, wherein, The lens body (22) is made of borosilicate glass or sapphire.

7. The electrode housing for online optical monitoring according to any one of claims 1 to 6, wherein, The electrode conductor (3) is either a negative electrode conductor or a positive electrode conductor.

8. A method for preparing an electrode shell for online optical monitoring, comprising: The lens assembly (2), the electrode conductor (3), and the sleeve (1) were prepared respectively. Electrode conductor (3) and lens assembly (2) are fixed sequentially at one end of sleeve (1), and the lens assembly (2) and electrode conductor (3) are electrically connected to sleeve (1) respectively.

9. The method for preparing the electrode shell for online optical monitoring according to claim 8, wherein, The steps for preparing the lens assembly (2) specifically include: A lens body (22) is made of light-transmitting material, a first support (21) is made of conductive material, and the lens body (22) is fixed on the first support (21) to form a lens assembly (2). The step of sequentially fixing the electrode conductor (3) and the lens assembly (2) to one end of the sleeve (1) also includes: The first bracket (21) is sealed to the sleeve (1).

10. A battery assembly, comprising: The cap, the battery cell, and the electrode housing for online optical monitoring according to any one of claims 1 to 7, wherein the battery cell is electrically connected to the cap and the electrode housing respectively, and the cap is insulated from one end of the electrode housing.

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