Electrode shell for on-line optical monitoring and battery assembly

Abstract

The utility model relates to the technical field of batteries, in particular to an electrode shell for on-line optical monitoring and a battery assembly. The electrode shell for on-line 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 embedded into one end of the sleeve in a sealed mode and electrically connected with the sleeve, and the lens body is fixed to the first support in a sealed mode. And the electrode conductor is embedded into the sleeve and is electrically connected with the sleeve. According to the electrode shell for on-line optical monitoring and the battery assembly provided by the utility model, direct optical monitoring on the internal state of the battery monomer is realized, and various optical monitoring means can be compatible; the lens body, the first bracket and the sleeve are in sealed connection, so that good air tightness is achieved, normal operation of the single battery is guaranteed, and non-interference measurement is realized; an existing battery monomer production process is compatible, so that the cost increase caused by process transformation is avoided; and the system can be compatible with existing electric equipment, charging and discharging equipment and the like.

Description

Technical Field

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

[0002] The evolution of components such as the positive electrode, negative electrode, separator, and electrolyte inside the battery cell runs through the entire life cycle of the battery cell. Direct and online monitoring of the internal state of the battery cell under working conditions / in-situ conditions is of great significance for studying the working and thermal runaway mechanisms of the battery cell, achieving battery cell-level safety warnings, and optimizing battery cell design.

[0003] At present, 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. Export 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 internal gas; or use a hollow optical fiber to extract the electrolyte inside a soft-pack battery cell.

[0006] 3. Implant sensors inside the battery cells; for example, drill holes at the bottom of finished cylindrical battery cells and insert slender optical fiber sensors to monitor the temperature and pressure inside the battery cells in real time.

[0007] 4. A light-transmitting mirror is provided on the outer shell of the battery cell, 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 cannot yet achieve direct, online monitoring of the internal state 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 from the outside of 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 method of installing a light-transmitting mirror on the outer shell, if successfully applied to mainstream cylindrical battery cells, will form a new monitoring paradigm, which can extract rich optical information from the inside of such battery cells and greatly deepen the understanding of their state evolution. To overcome the problems mentioned in the previous paragraph, it is necessary to make appropriate improvements to the outer shell of such battery cells to ensure that the outer shell still has good sealing after installing the mirror, and the structure does not change much, allowing the use of non-radioactive, non-interfering optical methods to directly and online monitor the internal state of mainstream cylindrical battery cells. Utility Model Content

[0010] The utility model provides an electrode shell and a battery assembly for online optical monitoring, so as to solve the problem that the prior art lacks an appropriate improvement plan for the mainstream structure cylindrical battery single body shell and cannot well support direct and online optical monitoring of internal status.

[0011] The utility model provides an electrode shell for online optical monitoring, comprising:

[0012] Sleeve;

[0013] A lens assembly, the lens assembly comprising: 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 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 utility model, 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 utility model, the second bracket and the first bracket are fitted to each other.

[0017] According to the electrode shell for online optical monitoring provided by the utility model, the first bracket is formed with an annular boss, and the annular boss at least partially protrudes from the lens body on both sides of the lens body.

[0018] According to the electrode shell for online optical monitoring provided by the utility model, 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.

[0019] According to the electrode shell for online optical monitoring provided by the utility model, 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.

[0020] According to the electrode shell for online optical monitoring provided by the utility model, there are at least two conductive beams.

[0021] According to the electrode shell for online optical monitoring provided by the utility model, the lens body is made of high borosilicate glass or sapphire.

[0022] According to the electrode shell for online optical monitoring provided by the utility model, the electrode conductor is a negative electrode conductor or a positive electrode conductor.

[0023] The utility model also provides a battery assembly, comprising: a cap, a battery cell and the above-mentioned electrode shell for online optical monitoring of the utility model, 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.

[0024] The utility model provides an electrode shell for online optical monitoring, which 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 on the first bracket; the electrode conductor is embedded in the sleeve and electrically connected to the sleeve. The utility model provides an electrode shell for online optical monitoring. Due to the existence of the lens body, direct optical monitoring of the internal state of the battery cell can be achieved; by reasonably selecting the material of the lens body, its transmission spectrum can be changed, so as to be compatible with a variety of optical monitoring methods such as human eyes, cameras, Raman spectroscopy, infrared thermal imaging, etc.; through the sealed connection of the lens body, the first bracket and the sleeve, 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; it is better compatible with existing electrical equipment, charging and discharging equipment, etc.

[0025] A 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

[0026] 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.

[0027] Figure 1 It is a schematic diagram of the structure of an electrode shell for online optical monitoring provided in one embodiment of the utility model.

[0028] Figure 2 It is a schematic longitudinal section diagram of an electrode shell for online optical monitoring provided in one embodiment of the utility model.

[0029] Figure 3 It is an exploded view of an electrode shell for online optical monitoring provided in one embodiment of the utility model.

[0030] Figure 4 It is a structural schematic diagram of a sleeve provided in one embodiment of the utility model.

[0031] Figure 5 It is a structural schematic diagram of a lens assembly provided in one embodiment of the utility model.

[0032] Figure 6 It is a structural schematic diagram of an electrode conductor provided in one embodiment of the utility model.

[0033] Reference numerals:

[0034] 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

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0038] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means 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 utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0040] Combine the following Figure 1-Figure 6 The present invention describes an electrode shell for online optical monitoring. The electrode shell for online optical monitoring comprises: a sleeve 1, a lens assembly 2 and an electrode conductor 3.

[0041] 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. 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.

[0042] It should be understood that the electrode shell for online optical monitoring provided by the present invention can be a negative electrode shell or a positive electrode shell as required. Generally speaking, according to the convention in the art, the expected electrode shell will be mainly used as a negative electrode shell, that is, the electrode conductor 3 is a negative electrode conductor. In the following embodiments, the negative electrode shell is taken as an example for description.

[0043] Specifically, the sleeve 1 is open at both ends, which serves as the outer wall of the lens assembly 2 and the electrode conductor 3, and the battery cell can be loaded into the sleeve 1 accordingly. The lens assembly 2 and the electrode conductor 3 are fixedly mounted at one end of the sleeve 1, and the battery cell can be loaded 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 appropriate light-transmitting materials to be compatible with various optical monitoring methods such as human eyes, cameras, Raman spectroscopy, infrared thermal imaging, etc.; the lens body 22, the first bracket 21 and the sleeve 1 are all sealed. On the one hand, it meets the assembly of the lens body 22, and on the other hand, it ensures the airtightness of the shell, thereby ensuring the normal operation of the battery cell. The electrode conductor 3 is used to electrically connect with the tab of the battery cell, and assumes the function of a negative conductor or a positive conductor according to the polarity of the connected tab. 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 flush, and can be designed and processed according to actual usage.

[0044] 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.

[0045] By setting a lens assembly 2 at the end of the sleeve 1, this embodiment can use 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 to be compatible with various optical monitoring means such as human eyes, cameras, 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.

[0046] The utility model provides an electrode shell for online optical monitoring, which includes: a sleeve 1, a lens assembly 2 and an electrode conductor 3; 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; the electrode conductor 3 is embedded in the sleeve 1 and electrically connected to the sleeve 1. The utility model provides an electrode shell for online optical monitoring. Due to the existence of the lens body 22, direct optical monitoring of the internal state of the battery cell is allowed; by reasonably selecting the material of the lens body 22, its transmission spectrum can be changed, so as to be compatible with a variety of optical monitoring methods such as human eyes, cameras, Raman spectroscopy, infrared thermal imaging, etc.; through the sealed connection of 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; compatible with the existing battery cell production process, avoiding the cost increase caused by process modification; better compatible with existing electrical equipment, charging and discharging equipment, etc.

[0047] 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 through 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 fitted with each other. Specifically, the second bracket 31 is supported on the inner wall of the sleeve 1, and the second bracket 31 can be fixed inside the sleeve 1 by welding and fit with the first bracket 21. The conductive column 32 is used to be electrically connected to the tab of the battery cell, and the conductive column 32 is electrically connected to the second bracket 31 and the sleeve 1 through 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 a good electrical connection, the entire electrode shell still has a good electrical connection.

[0048] 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 and installing 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 respectively. 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.

[0049] In one embodiment of the present invention, 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. 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, and the size of the annular bracket matches the size of the cylindrical sleeve 1, ensuring that the annular bracket can be embedded in the cylindrical sleeve 1. Of course, according to different battery cell / battery structures, sleeves 1 and bracket structures of other shapes can also be adopted.

[0050] In one of the embodiments of the utility model, 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, the conductive performance can be guaranteed; 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 the present 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 arranged and distributed in a circle; preferably, at least two conductive beams 33 may be arranged; preferably, when a plurality of conductive beams 33 are arranged, 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.

[0051] In one embodiment of the present invention, the lens body 22 is made of high borosilicate glass or sapphire material. It should be understood that other light-transmitting materials can also be used to replace it according to the selection of optical monitoring means. The high borosilicate glass in this embodiment is hard glass, which is a special glass material with low expansion rate, 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, and has a special material with high light transmittance, excellent mechanical properties and high chemical stability.

[0052] In one embodiment of the present invention, the electrode conductor 3 is a negative electrode conductor or a positive electrode conductor. According to 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, and assumes the function of the negative electrode conductor or the positive electrode conductor.

[0053] The utility model also provides a method for preparing an electrode shell for online optical monitoring. The preparation method specifically comprises the following steps:

[0054] S1, prepare the lens assembly 2, the electrode conductor 3 and the sleeve 1 respectively;

[0055] S2. The electrode conductor 3 and the 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.

[0056] 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 the three can be integrally formed, etc. The sleeve 1 can be directly purchased from an existing sleeve, or it can be modified and processed through an existing pipe fitting, for example: a pipe fitting with an open end of a suitable material and size is selected, and the sealing end surface is cut off along its cross section to form the sleeve 1.

[0057] The sleeve 1 in this preparation method can be prepared using the existing cylindrical battery cell shell. The existing cylindrical battery cell negative electrode shell can be used, and its sealing end face can be cut off to form a sleeve 1 with two ends connected. The prepared lens assembly 2 and electrode conductor 3 are installed at one end of the sleeve 1. The interior of the battery cell can be directly optically monitored through the lens assembly 2. The electrode conductor 3 can be prepared using 304 stainless steel and formed by cutting. The sleeve 1 prepared in this section has a mainstream cylindrical shape, so it is better compatible with existing electrical equipment, charging and discharging equipment, etc.

[0058] The utility model 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 a lens body 22, its transmission spectrum can be changed, thereby being compatible with a variety of optical monitoring methods such as human eyes, cameras, Raman spectroscopy, infrared thermal imaging, etc.; through the sealed connection of 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; it is relatively compatible with existing electrical equipment, charging and discharging equipment, etc.

[0059] In one embodiment of the utility model, 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 is sealed and connected with the sleeve 1 by laser welding and 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.

[0060] The utility model also provides a battery assembly, which comprises: a cap, a battery cell and an electrode shell for online optical monitoring in the above embodiment of the utility model, 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.

[0061] 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-mentioned embodiment of the present invention.

[0062] Taking the electrode shell used for online optical monitoring in the embodiment of the utility model as an example, the electrode shell used for the negative electrode (hereinafter referred to as "negative electrode shell"), the usual cylindrical battery cell production process includes a negative electrode spot welding process, that is, spot welding the negative electrode tab of the battery cell to the bottom surface of the shell. Since the bottom surface of the negative electrode shell of this embodiment is provided with a lens body 22 (in terms of its material properties, it 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.

[0063] The above negative electrode shell is used in the negative electrode spot welding process, and the specific operation is as follows:

[0064] 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.

[0065] 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 welding spot. When the negative electrode shell is used in this process, its metal part forms a path, allowing the welding current to pass between the negative electrode tab and the conductive column 32; the welding needle pressure is also applied to the negative electrode tab and the conductive column 32. As a result, a welding spot is formed between the negative electrode tab and the conductive column 32, making the negative electrode tab and the negative electrode shell conductive.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 utility model.

Claims

1. An electrode shell for online optical monitoring, characterized in that: include: Sleeve (1); A lens assembly (2), the lens assembly (2) comprising: a first bracket (21) and a lens body (22), the first bracket (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 bracket (21); An electrode conductor (3), wherein the electrode conductor (3) is embedded in the sleeve (1) and is 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 2, characterized in that: The second bracket (31) and the first bracket (21) are in contact with each other.

4. 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).

5. 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).

6. 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.

7. The electrode shell for online optical monitoring according to claim 6, characterized in that: There are at least two conductive beams.

8. 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.

9. The electrode shell 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.

10. A battery assembly, characterized in that: include: A cap, a battery cell and an electrode shell for online optical monitoring as claimed in any one of claims 1 to 9, 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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