Electrode housing for online optical monitoring, method of manufacture and battery assembly

Abstract

The present application relates to the technical field of battery, especially to an electrode shell for online optical monitoring, a preparation method and a battery assembly. The electrode shell 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 sealingly embedded in one end of the sleeve and electrically connected with the sleeve, and the lens body is sealingly fixed on the first support; the electrode conductor is embedded in the sleeve and electrically connected with the sleeve. The electrode shell 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 the battery monomer, are compatible with various optical monitoring methods, have good air tightness through the sealing connection of the lens body, the first support and the sleeve, guarantee the normal operation of the battery monomer, realize non-interference measurement, are compatible with the existing battery monomer production process, avoid cost increase caused by process transformation, and are compatible with existing electrical equipment, charging and discharging equipment and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to an electrode shell for online optical monitoring, a preparation method and a battery assembly. Background Art

[0002] The evolution of components within a battery cell, including the positive electrode, negative electrode, separator, and electrolyte, occurs throughout its entire lifecycle. Direct, online monitoring of the internal state of a battery cell under operating / in-situ conditions is crucial for studying its operation and thermal runaway mechanisms, implementing cell-level safety warnings, and optimizing cell design.

[0003] Currently, there are four main types of technical means to complete this type of monitoring:

[0004] 1. Radiation imaging, using neutrons, X-rays, etc. to see the internal state of battery cells in real time.

[0005] 2. Drain the internal contents 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 internal gas; or use a hollow optical fiber to extract the electrolyte inside a soft-pack battery cell.

[0006] 3. Implanting sensors inside battery cells; for example, drilling holes in the bottom of a finished cylindrical battery cell and inserting slender fiber optic sensors to monitor the temperature and pressure inside the battery cell in real time.

[0007] 4. A light-transmitting mirror is installed on the battery cell shell, and the internal state of the battery cell is monitored by optical means such as human eyes, cameras, and Raman spectroscopy.

[0008] The above four existing technical means are still unable to achieve direct, online monitoring of the internal status of mainstream cylindrical battery cells. Specifically: the first type of means will introduce potential radiation hazards, and can basically only obtain internal geometric information of the battery cell (such as the shape of the pole piece), and it is difficult to obtain other information. The second type of means will cause abnormal flow of substances inside the battery cell, interfering with the operation of the battery cell. The third and fourth types of means are applied to mainstream cylindrical battery cells. When modifying the outer shell, it is easy to destroy its sealing, resulting in the intrusion of substances such as oxygen and moisture outside the battery cell, as well as the loss and deterioration of the internal components of the battery cell, interfering with the operation of the battery cell.

[0009] The fourth approach, involving the installation of a translucent sight glass within the outer casing, could, if successfully applied to mainstream cylindrical battery cells, establish a new monitoring paradigm, enabling the extraction of rich optical information from within these cells and significantly deepening our understanding of their state evolution. Overcoming the aforementioned issues requires appropriate improvements to the outer casing of these cells, ensuring that the sight glass remains well sealed and that the structure remains minimally altered, allowing for direct, online monitoring of the internal state of mainstream cylindrical battery cells using non-radioactive, non-intrusive optical methods. Summary of the Invention

[0010] The present invention provides an electrode shell, a preparation method and a battery assembly for online optical monitoring to solve the problem in the prior art that there is a lack of appropriate improvement solutions for the mainstream cylindrical battery cell shell and it cannot well support direct, online optical monitoring of the internal state.

[0011] The present invention provides an electrode shell for online optical monitoring, comprising:

[0012] sleeve;

[0013] A lens assembly, comprising: a first bracket and a lens body, wherein the first bracket is sealed and embedded in one end of the sleeve and electrically connected to the sleeve, and the lens body is sealed and fixed on the first bracket;

[0014] An electrode conductor is embedded in the sleeve and electrically connected to the sleeve.

[0015] According to the electrode shell for online optical monitoring provided by the present invention, the electrode conductor includes: a second bracket, a conductive column and a conductive beam, the conductive column is electrically connected to the second bracket through the conductive beam, and the second bracket is embedded in the sleeve and electrically connected to the sleeve.

[0016] According to the electrode shell for online optical monitoring provided by the present invention, the first bracket is formed with an annular boss, and the annular boss at both sides of the lens body at least partially protrudes from the lens body.

[0017] According to the electrode shell for online optical monitoring provided by the present invention, the sleeve is a cylindrical sleeve, the first bracket and the second bracket are both annular brackets, and the annular bracket is suitable for being embedded in the cylindrical sleeve.

[0018] According to the electrode shell for online optical monitoring provided by the present invention, the conductive column is located at the geometric center of the second bracket, and the conductive beams are distributed circumferentially with the conductive column as the center.

[0019] According to the electrode shell for online optical monitoring provided by the present invention, the lens body is made of high borosilicate glass or sapphire.

[0020] According to the electrode shell for online optical monitoring provided by the present invention, the electrode conductor is a negative electrode conductor or a positive electrode conductor.

[0021] The present invention also provides a method for preparing an electrode shell for online optical monitoring, comprising:

[0022] preparing a lens assembly, an electrode conductor and a sleeve respectively;

[0023] An electrode conductor and a lens assembly are fixed in sequence at one end of the sleeve, and the lens assembly and the electrode conductor are electrically connected to the sleeve respectively.

[0024] According to the method for preparing an electrode shell for online optical monitoring provided by the present invention, in the step of preparing a lens assembly, the steps specifically include:

[0025] A lens body is made of a light-transmitting material, a first bracket is made of a conductive material, and the lens body is fixed on the first bracket to form a lens assembly;

[0026] The step of sequentially fixing the electrode conductor and the lens assembly at one end of the sleeve further includes:

[0027] The first bracket is sealed and connected to the sleeve.

[0028] The present invention also provides a battery assembly, comprising: a cap, a battery cell and the electrode shell for online optical monitoring of the present invention, wherein the battery cell is electrically connected to the cap and the electrode shell respectively, and the cap is insulated and assembled with one end of the electrode shell.

[0029] The present invention provides an electrode shell for online optical monitoring and a preparation method thereof. The electrode shell for online optical monitoring includes: a sleeve, a lens assembly, and an electrode conductor; the lens assembly includes: a first bracket and a lens body, the first bracket is sealed and embedded in one end of the sleeve and electrically connected to the sleeve, and the lens body is sealed and fixed to the first bracket; the electrode conductor is embedded in the sleeve and electrically connected to the sleeve. The electrode shell for online optical monitoring provided by the present invention can realize direct optical monitoring of the internal state of the battery cell due to the presence of the lens body. By reasonably selecting the material of the lens body, its transmission spectrum can be changed, thereby being compatible with various optical monitoring methods such as the human eye, camera, Raman spectroscopy, infrared thermal imaging, etc.; the sealed connection between the lens body, the first bracket, and the sleeve has good airtightness, can ensure the normal operation of the battery cell, and realize non-interference measurement; it is compatible with the existing battery cell production process, avoiding the cost increase caused by process modification; and it is relatively compatible with existing electrical equipment, charging and discharging equipment, etc.

[0030] The battery assembly provided by the present invention has the same advantages as above because it includes the electrode shell for online optical monitoring of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 It is a schematic structural diagram of an electrode shell for online optical monitoring provided in one embodiment of the present invention.

[0033] Figure 2 Schematic diagram of a longitudinal section of an electrode shell for online optical monitoring provided in one embodiment of the present invention.

[0034] Figure 3 FIG. 4 is an exploded view of an electrode shell for online optical monitoring provided in one embodiment of the present invention.

[0035] Figure 4 It is a schematic structural diagram of a sleeve provided in one embodiment of the present invention.

[0036] Figure 5 It is a schematic structural diagram of a lens assembly provided in one embodiment of the present invention.

[0037] Figure 6 Schematic diagram of the structure of an electrode conductor provided in one embodiment of the present invention.

[0038] Reference numerals:

[0039] 1: sleeve; 2: lens assembly; 21: first bracket; 22: lens body; 23: annular boss; 3: electrode conductor; 31: second bracket; 32: conductive column; 33: conductive beam. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0042] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0043] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0045] The following combination Figures 1-6The present invention describes an electrode housing for online optical monitoring. The electrode housing for online optical monitoring comprises: a sleeve 1, a lens assembly 2 and an electrode conductor 3.

[0046] 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 is 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 is electrically connected to the sleeve 1.

[0047] It should be understood that the electrode housing for online optical monitoring provided by the present invention can be either a cathode housing or a cathode housing, as desired. Generally speaking, according to conventional practice in the art, the electrode housing is primarily intended to be used as a cathode housing, meaning that the electrode conductor 3 is a cathode conductor. The following embodiments utilize the cathode housing as an example.

[0048] Specifically, the sleeve 1 is open at both ends, serving as the outer walls of the lens assembly 2 and electrode conductor 3, allowing the battery cells to be installed into the sleeve 1. The lens assembly 2 and electrode conductor 3 are fixedly mounted at one end of the sleeve 1, while the battery cells can be installed from the other end. 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 accommodate various optical monitoring methods, such as the human eye, cameras, Raman spectroscopy, and infrared thermal imaging. The lens body 22, first bracket 21, and sleeve 1 are all sealed, ensuring both assembly of the lens body 22 and airtightness of the outer casing, thereby ensuring proper operation of the battery cells. The electrode conductor 3 electrically connects to the tabs of the battery cells and functions as either a negative or positive conductor, depending on the polarity of the connected tabs. Furthermore, the position of the lens assembly 2 can be adjusted along the axial direction of the sleeve 1, and the end faces of the lens assembly 2 can be aligned or not, depending on the design and processing requirements.

[0049] The lens body 22 , the first bracket 21 and the sleeve 1 can be sealed and connected by laser welding, high temperature sintering or brazing to ensure airtightness.

[0050] By arranging a lens assembly 2 at the end of the sleeve 1, this embodiment can adopt various optical monitoring means to carry out direct optical monitoring of the internal state of the battery cell; by reasonably selecting the material of the lens body 22, its transmission spectrum can be changed, thereby being compatible with various optical monitoring means such as the human eye, camera, Raman spectroscopy, infrared thermal imaging, etc.; it has good airtightness, can ensure the normal operation of the battery cell, and realize non-interference measurement; it is compatible with the existing battery cell production process, and avoids the cost of process modification at the economic level; the sleeve 1 can be modified with the existing cylindrical battery cell shell, and the shape of the sleeve 1 is the mainstream cylindrical, which is better compatible with existing electrical equipment, charging and discharging equipment, etc.

[0051] The present invention provides an electrode shell for online optical monitoring, comprising: a sleeve 1, a lens assembly 2, and an electrode conductor 3. The lens assembly 2 comprises: 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 to the first bracket 21. The electrode conductor 3 is embedded in the sleeve 1 and electrically connected to the sleeve 1. The electrode shell for online optical monitoring provided by the present invention, due to the presence of the lens body 22, allows direct optical monitoring of the internal state of the battery cell. By properly selecting the material of the lens body 22, its transmission spectrum can be changed, thereby being compatible with various optical monitoring methods such as the human eye, cameras, Raman spectroscopy, and infrared thermal imaging. The sealed connection between the lens body 22, the first bracket 21, and the sleeve 1 provides good airtightness, can ensure the normal operation of the battery cell, and achieve non-interference measurement. The electrode shell is compatible with existing battery cell production processes, avoiding cost increases caused by process modifications. It is also highly compatible with existing electrical equipment, charging and discharging equipment, etc.

[0052] In one embodiment of the present invention, Figure 6 As shown, the electrode conductor 3 includes: a second bracket 31, a conductive column 32, and a plurality of conductive beams 33. The conductive column 32 is electrically connected to the second bracket 31 via the plurality of conductive beams 33. The second bracket 31 is embedded in the sleeve 1 and electrically connected to the sleeve 1, and the second bracket 31 and the first bracket 21 are in contact with each other. Specifically, the second bracket 31 is supported on the inner wall of the sleeve 1 and can be fixed to the interior of the sleeve 1 by welding so that it is in contact with the first bracket 21. The conductive column 32 is used to electrically connect to the tab of the battery cell. The conductive column 32 is electrically connected to the second bracket 31 and the sleeve 1 via the conductive beams 33. In addition, the second bracket 31 and the first bracket 21 are arranged to fit each other, which can form a direct electrical connection between the electrode conductor 3 and the lens assembly 2 as a backup electrical connection method: specifically, if the contact between the electrode conductor 3 and the sleeve 1 is poor, as long as the electrode conductor 3 and the lens assembly 2, and the lens assembly 2 and the sleeve 1 maintain good electrical connection, the entire electrode shell will still have a good electrical connection.

[0053] In one embodiment of the present invention, Figure 5 As shown, the first bracket 21 is formed with an annular boss 23, and the annular boss 23 at least partially protrudes from the lens body 22 on both sides of the lens body 22. In this embodiment, the outer contour of the first bracket 21 is a shape that protrudes from the lens body 22, which not only has the function of fixing the lens body 22, but also reduces the possibility of the lens body 22 being damaged by external mechanical means. Specifically, Figure 4As shown, an annular boss 23 is formed on the outer edge of the first bracket 21, and the annular boss 23 extends toward both sides of the lens body 22. The annular boss 23 has a certain supporting and protective effect, reducing the chance of direct contact between the lens body 22 and the outside world, thereby reducing the possibility of mechanical damage to it.

[0054] In one embodiment of the present invention, 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 suitable for embedding into 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 dimensions of the annular brackets match the dimensions of the cylindrical sleeve 1, ensuring that the annular brackets can be embedded in the cylindrical sleeve 1. Of course, depending on different battery cell / battery structures, other shapes of sleeves 1 and bracket structures can also be adopted.

[0055] In one embodiment of the present invention, the conductive column 32 is located at the geometric center of the second bracket 31, and a plurality of conductive beams 33 are circumferentially distributed with the conductive column 32 as the center. In the embodiment using multiple conductive beams, on the one hand, it can ensure the conductive performance; on the other hand, when the multiple conductive beams 33, the conductive column 32 and the second bracket 31 are connected by spot welding, the structural stability is good. In this embodiment, the conductive column 32 is located at the geometric center of the second bracket 31. When the second bracket 31 is a circular bracket, the conductive column 32 is located at the center of the second bracket 31, and a plurality of conductive beams 33 are provided and distributed in a circular pattern. Preferably, when a plurality of conductive beams 33 are provided, the angles between two adjacent conductive beams 33 are the same, for example: Figure 5 As shown, three conductive beams 33 are evenly arranged, and the angle between each two adjacent conductive beams 33 is 120 degrees. Since the conductive column 32 is located at the center of the second bracket 31, it is convenient to electrically connect with the battery cell.

[0056] In one embodiment of the present invention, the lens body 22 is made of borosilicate glass or sapphire. It should be understood that other translucent materials can be substituted depending on the optical monitoring method used. The borosilicate glass in this embodiment is a 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 primarily composed of aluminum oxide and exhibits high light transmittance, excellent mechanical properties, and high chemical stability.

[0057] In one embodiment of the present invention, 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 electrode tab or the positive electrode tab of the battery cell, serving as the negative electrode conductor or the positive electrode conductor.

[0058] The present invention also provides a method for preparing an electrode shell for online optical monitoring. The preparation method specifically comprises the following steps:

[0059] S1, prepare the lens assembly 2, the electrode conductor 3 and the sleeve 1 respectively;

[0060] S2. Fix the electrode conductor 3 and the lens assembly 2 in sequence at one end of the sleeve 1, and electrically connect the lens assembly 2 and the electrode conductor 3 to the sleeve 1 respectively.

[0061] The lens assembly 2, the electrode conductor 3, and the sleeve 1 can be independent structures, prepared separately and then assembled, or they can be integrally formed and then assembled with one another, or all three can be integrally formed. The sleeve 1 can be directly purchased from an existing sleeve or modified from an existing pipe. For example, a pipe with an open end of appropriate material and size can be selected and the sealing end surface can be cut away along its cross section to form the sleeve 1.

[0062] The sleeve 1 in this preparation method can be made from an existing cylindrical battery cell shell. The sealed end face of an existing cylindrical battery cell negative electrode shell can be cut off to form a sleeve 1 with two connected ends. The prepared lens assembly 2 and electrode conductor 3 are installed at one end of the sleeve 1. The lens assembly 2 allows direct optical monitoring of the interior of the battery cell. The electrode conductor 3 can be made of 304 stainless steel and formed by cutting. The sleeve 1 prepared in this section has a mainstream cylindrical shape, which is more compatible with existing electrical equipment, charging and discharging equipment, etc.

[0063] The present invention provides a method for preparing an electrode shell for online optical monitoring, which can realize 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, thereby being compatible with various optical monitoring means such as the human eye, camera, Raman spectroscopy, and infrared thermal imaging; through the sealed connection between the lens body 22, the first bracket 21 and the sleeve 1, it has good airtightness, can ensure the normal operation of the battery cell, and realize non-interference measurement; it is compatible with the existing battery cell production process, avoiding the cost increase caused by process modification; and it is well compatible with existing electrical equipment, charging and discharging equipment, etc.

[0064] In one embodiment of the present invention, in the step of preparing the lens assembly 2 in step S1, the step specifically includes: taking high borosilicate glass to make the lens body 22, taking steel to make the first bracket 21, and fixing the lens body 22 on the first bracket 21 to form the lens assembly 2; in the step of fixing the electrode conductor 3 and the lens assembly 2 in sequence at one end of the sleeve 1 in step S3, the step also includes: the first bracket 21 and the sleeve 1 are sealed and connected by laser welding or other processes. In this embodiment, the lens body 22 can also be made of other materials. In this embodiment, the first bracket 21, the lens body 22 and the sleeve 1 are sealed and connected by high-temperature sintering, brazing, laser welding and other processes to improve the airtightness of the electrode shell and ensure the normal operation of the battery cell.

[0065] The present invention also provides a battery assembly comprising a cap, a battery cell, and an electrode shell for online optical monitoring according to the above embodiment of the present invention, wherein the battery cell is electrically connected to the cap and the electrode shell, respectively, and the cap is insulated from one end of the electrode shell.

[0066] A battery assembly provided by the present invention has the same advantages as above because it includes the electrode shell for online optical monitoring in the above embodiment of the present invention.

[0067] Taking the electrode housing used for online optical monitoring in the embodiment of the present invention as an example, the electrode housing for the negative electrode (hereinafter referred to as the "negative electrode housing"), the typical production process for cylindrical battery cells includes a negative electrode spot welding process, which involves spot welding the negative electrode tab of the battery cell to the bottom surface of the housing. Because the bottom surface of the negative electrode housing in this embodiment is provided with a lens body 22 (due to its material properties, it is generally non-conductive and not resistant to mechanical impact), a negative electrode conductor is provided to accommodate this negative electrode spot welding process.

[0068] The above-mentioned negative electrode shell is used in the negative electrode spot welding process, and the specific operation is as follows:

[0069] Step 1: Install the cylindrical battery cell into the sleeve 1 along the busbar direction of the negative electrode shell, and the negative electrode tab of the battery cell contacts the conductive column 32; 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 base of the spot welding machine, and perform the spot welding process.

[0070] The core of the negative electrode spot welding process is the combined effect of heat generated by the welding current and mechanical pressure from the welding needle to form a weld point. When the negative electrode casing is used in this process, its metal portion forms a path, allowing the welding current to pass between the negative electrode tab and the conductive post 32. Pressure from the welding needle also applies to the negative electrode tab and the conductive post 32. This creates a weld point between the negative electrode tab and the conductive post 32, establishing electrical continuity between the negative electrode tab and the negative electrode casing.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An electrode shell for online optical monitoring, characterized in that: include: A sleeve (1) for accommodating a battery cell; A lens assembly (2), comprising: a first bracket (21) and a lens body (22), wherein the first bracket (21) is sealed and embedded in one end of the sleeve (1) and is electrically connected to the sleeve (1), and the lens body (22) is sealed and fixed on the first bracket (21); An electrode conductor (3) is used for electrically connecting to the tab of the battery cell; the electrode conductor (3) is embedded in the sleeve (1) and electrically connected to the sleeve (1).

2. The electrode shell for online optical monitoring according to claim 1, characterized in that: The electrode conductor (3) comprises: a second bracket (31), a conductive column (32) and a conductive beam (33); the conductive column (32) is electrically connected to the second bracket (31) via the conductive beam (33); and the second bracket (31) is embedded in the sleeve (1) and electrically connected to the sleeve (1).

3. The electrode shell for online optical monitoring according to claim 1, characterized in that: The first bracket (21) is formed with an annular boss (23), and the annular boss (23) at least partially protrudes from the lens body (22) on both sides of the lens body (22).

4. The electrode shell for online optical monitoring according to claim 2, characterized in that: The sleeve (1) is a cylindrical sleeve (1), the first bracket (21) and the second bracket (31) are both annular brackets, and the annular brackets are suitable for being embedded in the cylindrical sleeve (1).

5. The electrode shell for online optical monitoring according to claim 2, characterized in that: The conductive column (32) is located at the geometric center of the second bracket (31), and the conductive beams (33) are distributed circumferentially with the conductive column (32) as the center.

6. The electrode shell for online optical monitoring according to claim 1, characterized in that: The lens body (22) is made of high borosilicate glass or sapphire.

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

8. A method for preparing an electrode shell for online optical monitoring according to any one of claims 1 to 7, characterized in that: include: Prepare the lens assembly (2), the electrode conductor (3) and the sleeve (1) respectively; An electrode conductor (3) and a lens assembly (2) are fixed in sequence at one end of the sleeve (1), and the lens assembly (2) and the electrode conductor (3) are electrically connected to the sleeve (1) respectively.

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

10. A battery assembly, characterized in that: include: A cap, a battery cell and an electrode shell 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 shell respectively, and the cap is insulated and assembled with one end of the electrode shell.

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