A battery lithium precipitation observation device

Abstract

This invention provides a lithium plating observation device for batteries, relating to the field of lithium battery technology. The device includes a lithium plating mechanism, a container mechanism, and an observation mechanism. The lithium plating mechanism includes a battery load application module. The container mechanism contains electrolyte. The lithium plating mechanism is placed inside the container mechanism, the battery load application module is immersed in the electrolyte, and a lithium battery is placed on the battery load application module. The observation mechanism is fixed outside the container mechanism, with its viewing angle directly facing the lithium battery. The lithium plating observation device provided by this invention has a simple structure, is easy to operate, has low cost, and provides good lithium plating observation results.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and more specifically, to a battery lithium plating observation device. Background Technology

[0002] During battery operation, lithium ions deposit on the surface of the negative electrode, a phenomenon known as lithium plating. Lithium plating leads to the loss of active materials and a decline in battery cycle performance, resulting in a loss of battery performance. Simultaneously, the growth of lithium dendrites can puncture the separator, causing a short circuit and potentially triggering thermal runaway, posing a serious threat to battery safety. Therefore, observing lithium plating in batteries can better help researchers study the evolution of battery performance and the mechanism of lithium plating.

[0003] Currently, researchers typically observe lithium deposition on the negative electrode of batteries using in-situ physical characterization techniques. However, this method is subject to significant limitations in observation conditions, requires expensive equipment, and is difficult to operate. Utility Model Content

[0004] The purpose of this invention is to provide a battery lithium plating observation device that can at least partially solve the above-mentioned technical problems.

[0005] This utility model provides a battery lithium plating observation device, which includes a battery lithium plating mechanism, a holding mechanism, and an observation mechanism. The battery lithium plating mechanism includes a battery load application module. The container is filled with electrolyte; The lithium plating mechanism is placed inside the container, the battery load application module is immersed in the electrolyte, and a lithium battery is placed on the battery load application module. The observation mechanism is fixed to the outside of the container, and the observation mechanism's viewing angle is directed towards the lithium battery.

[0006] Optionally, the battery lithium plating mechanism further includes at least two threaded posts and multiple nuts; The threaded post penetrates the battery load application module. Each of the threaded posts is provided with multiple nuts.

[0007] Optionally, the battery load application module includes a first base plate, a middle plate, a first upper plate, and a snap-fit ​​bracket; The first base plate, the middle plate, and the first top plate are connected in sequence by the threaded post, and the middle plate is disposed between the first base plate and the first top plate; The buckle bracket is a hollow U-shaped bracket, and the buckle bracket is disposed between the middle plate and the first bottom plate.

[0008] Optionally, the first upper plate and the middle plate are respectively provided with a first observation hole, and the first observation hole is located on the observation path of the observation mechanism; The first base plate is provided with a plurality of first protrusions, and the inner perimeter of each first protrusion is greater than or equal to the outer perimeter of the side of the buckle bracket closest to the first base plate. The lithium battery is installed in the space enclosed by each of the first protrusions, located between the first base plate and the buckle bracket; The buckle bracket has a second protrusion on the side near the middle plate, and the middle plate has a first groove on the side near the buckle bracket. The second protrusion is adapted to the first groove. The buckle bracket is connected and fixed to the middle plate through the second protrusion and the first groove.

[0009] Optionally, the battery load application module further includes a pressure sensor, and a second groove is provided on the side of the middle plate away from the buckle bracket; The pressure sensor is installed in the second groove; The first upper plate is in contact with the pressure sensor. A nut is provided on the threaded post that passes through the first upper plate, away from the pressure sensor. The load on the lithium battery in the clip bracket can be changed by adjusting the nut.

[0010] Optionally, the battery load application module includes a second base plate, a second upper plate, and a square hole fixing bracket; The second base plate and the second upper plate are connected in sequence by the threaded post, and the square hole fixing bracket is disposed between the second base plate and the second upper plate; The square hole fixing bracket is a hollow bracket, and the square hole fixing bracket is connected to the second upper plate through a connector.

[0011] Optionally, the second upper plate and the square hole fixing bracket are respectively provided with second observation holes, and the second observation holes are located on the observation path of the observation mechanism; The second base plate is provided with a plurality of third protrusions, and the inner perimeter of each third protrusion is greater than or equal to the outer perimeter of the side of the square hole fixing bracket near the second base plate. The lithium battery is installed within the space enclosed by the third protrusions, located between the second base plate and the square hole fixing bracket.

[0012] Optionally, the battery load application module further includes a plurality of first bolts, a plurality of second bolts, and a plurality of springs; The number of the first bolt, the number of the second bolt, and the number of the springs are all the same; Each of the first bolts passes through the square hole fixing bracket, and each of the second bolts passes through the second upper plate, with each of the first bolts and each of the second bolts being opposite to each other; Each of the first bolts is elastically connected to a second bolt via a spring located between the second upper plate and the square hole fixing bracket.

[0013] Optionally, the container includes a transparent glass container and a transparent glass lid; The transparent glass cover is positioned opposite the bottom of the transparent glass container.

[0014] Optionally, the lithium battery includes a working electrode, a separator, a counter electrode, a reference electrode, a copper mesh, and multiple wires; The counter electrode and the reference electrode are located in the same plane; The working electrode has two layers, and the copper mesh is located between the two working electrode layers; The diaphragm is disposed between the working electrode and the counter electrode / reference electrode; The three wires are connected at one end to the working electrode, the counter electrode, and the reference electrode, respectively, and at the other end of the three wires pass through the container and are connected to the outside.

[0015] The beneficial effects of the battery lithium plating observation device provided by this utility model are: A lithium-ion battery observation device is constructed, comprising a lithium-ion plating mechanism, a container mechanism, and an observation mechanism. The battery is mounted on the lithium-ion plating mechanism and placed in the container mechanism, and the electrolyte is poured into the container and sealed. The observation mechanism then performs in-situ optical observation of the lithium-ion battery plating process. The device is simple in structure, inexpensive, requires undemanding observation conditions, and is easy to operate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the battery lithium plating observation device provided in an embodiment of this utility model; Figure 2 One of the structural schematic diagrams of the battery load application module provided in this embodiment of the utility model; Figure 3 An exploded view of the battery load application module provided in an embodiment of this utility model; Figure 4 A schematic diagram of the middle plate provided in an embodiment of this utility model; Figure 5 A second schematic diagram of the battery load application module provided in this embodiment of the utility model; Figure 6 This is a schematic diagram showing the connection between the square hole fixing bracket and the second upper plate provided in an embodiment of the present utility model; Figure 7 This is a schematic diagram of the structure of a lithium battery provided in an embodiment of the present invention.

[0018] Icons: 01-Battery lithium plating observation device; 10-Battery lithium plating mechanism; 11-Battery load application module; 111-First base plate; 1111-First protrusion; 112-Middle plate; 1121-First observation hole; 1122-First groove; 1123-Second groove; 113-First upper plate; 114-Snap bracket; 1141-Second protrusion; 115-Pressure sensor; 311-Second base plate; 3111-Third protrusion; 312-Second upper plate; 3121-Second observation hole; 313-Square hole fixing bracket; 314-First bolt; 315-Second bolt; 316-Spring; 12-Threaded post; 13-Nut; 20-Container mechanism; 22-Transparent glass container; 23-Transparent glass cover; 30-Observation mechanism; 40-Lithium battery; 41-Working electrode; 42-Diaphragm; 43-Counter electrode; 44-Reference electrode; 45-Copper mesh; 46-Wire. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component 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 this utility model.

[0023] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Lithium deposition on the negative electrode of a battery can be characterized by various physical properties, such as morphology, interface properties, chemical composition, and microstructure. Therefore, in current technologies, researchers generally observe lithium deposition on the negative electrode using in-situ physical characterization techniques (such as scanning electron microscopy, transmission electron microscopy, nuclear magnetic resonance spectroscopy, X-ray diffraction, and neutron diffraction). However, these methods suffer from drawbacks such as stringent observation conditions, expensive equipment, and high operational complexity.

[0026] Based on the above, this specification provides a battery lithium plating observation device 01, which can effectively alleviate the above-mentioned technical problems.

[0027] Please see Figure 1 , Figure 7 This embodiment provides a battery lithium plating observation device 01, which includes a battery lithium plating mechanism 10, a holding mechanism 20 and an observation mechanism 30. The battery lithium plating mechanism 10 includes a battery load application module 11.

[0028] The container 20 contains electrolyte. The lithium plating mechanism 10 is placed inside the container 20. The battery load application module 11 is immersed in the electrolyte, and a lithium battery 40 is placed on the battery load application module 11.

[0029] The observation mechanism 30 is fixed to the outside of the container 20, and the viewing angle of the observation mechanism 30 is directly facing the lithium battery 40.

[0030] The observation unit 30 can be a CCD camera, and multiple observation units 30 can be set up from different angles to observe lithium plating in batteries, such as... Figure 1 As shown, an observation mechanism 30 is set up in both the vertical and horizontal directions to observe lithium plating in the battery.

[0031] In this embodiment of the invention, when observing lithium plating in the lithium battery 40, the first step is to... Figure 7 The lithium battery 40, after being processed (e.g., having its casing removed), is placed inside the battery load application module 11 of the lithium plating mechanism 10. The lithium plating mechanism 10 can then be adjusted for factors such as pressure. After adjustment, the lithium plating mechanism 10 is placed in the holding mechanism 20, and electrolyte is poured in. Researchers can then observe the lithium plating process through the observation mechanism 30. To ensure that the structure of the lithium battery 40 is not damaged by the pressure applied by the battery load application module 11, a transparent polyimide plate can be placed over the lithium battery 40 after it is in place.

[0032] Optionally, the lithium battery 40 includes a working electrode 41, a separator 42, a counter electrode 43, a reference electrode 44, a copper mesh 45, and multiple wires 46.

[0033] The counter electrode 43 and the reference electrode 44 are located on the same plane. The working electrode 41 consists of two layers, with a copper mesh 45 located between the two working electrode layers 41. The diaphragm 42 is disposed between the working electrode 41 and the counter electrode 43 / reference electrode 44.

[0034] There are three wires 46. One end of each wire 46 is electrically connected to the working electrode 41, the counter electrode 43, and the reference electrode 44, respectively. The other end of each wire 46 passes through the container mechanism 20 and is connected to the outside.

[0035] In this embodiment of the utility model, the following can be used: Figure 7 The lithium battery 40 shown above was used for lithium plating observation. The function of the wire 46 is to simulate the charging and discharging states of the lithium battery 40 through an external power supply.

[0036] Optionally, the battery lithium plating mechanism 10 also includes at least two threaded posts 12 and multiple nuts 13.

[0037] The threaded post 12 is installed through the battery load application module 11. Each threaded post 12 is provided with multiple nuts 13.

[0038] Still with Figure 1For example, in order to prevent the battery load application module 11 from shifting and to ensure the stability of the battery load application module 11, a threaded post 12 can be installed at each of the four corners of the battery load application module 11, and multiple nuts 13 can be set on the threaded post 12 to fasten the battery load application module 11.

[0039] Optionally, the container 20 includes a transparent glass container 22 and a transparent glass lid 23. The transparent glass lid 23 is disposed opposite to the bottom of the transparent glass container 22.

[0040] like Figure 1 As shown, the container 20 can be made of a transparent glass container 22 and a transparent glass cover 23. The transparent glass container 22 and the transparent cover can ensure the clarity of the observation by the observation mechanism 30. Polyimide has a high temperature resistance of over 400℃, some parts have no obvious melting point, and it has high insulation properties. Therefore, the transparent glass cover 23 can be used as the top cover of the container 20.

[0041] Optionally, the battery load application module 11 includes a first base plate 111, a middle plate 112, a first upper plate 113, and a snap-fit ​​bracket 114.

[0042] The first base plate 111, the middle plate 112, and the first upper plate 113 are connected in sequence by threaded posts 12, with the middle plate 112 positioned between the first base plate 111 and the first upper plate 113.

[0043] The buckle bracket 114 is a hollow U-shaped bracket, and the buckle bracket 114 is set between the middle plate 112 and the first base plate 111.

[0044] Please see Figure 2 The battery load application module 11 can be composed of four parts: a first base plate 111, a middle plate 112, a first upper plate 113, and a snap-fit ​​bracket 114. After the lithium battery 40 is installed, tightening the nut 13 on the first upper plate 113 allows the pressure of the first upper plate 113 to be transmitted through the middle plate 112 and the snap-fit ​​bracket 114 to the lithium battery 40 between the snap-fit ​​bracket 114 and the first base plate 111, thereby allowing observation of lithium deposition in the lithium battery 40 under pressure. Setting the snap-fit ​​bracket 114 as a hollow U-shaped bracket facilitates lithium deposition observation by the observation mechanism 30.

[0045] Optionally, a first observation hole 1121 is provided on the first upper plate 113 and the middle plate 112 respectively, and the first observation hole 1121 is located on the observation path of the observation mechanism 30.

[0046] The first base plate 111 is provided with a plurality of first protrusions 1111, and the inner circumference of each first protrusion 1111 is greater than or equal to the outer circumference of the side of the buckle bracket 114 close to the first base plate 111.

[0047] The lithium battery 40 is installed in the space enclosed by the first protrusions 1111, and is located between the first base plate 111 and the buckle bracket 114.

[0048] A second protrusion 1141 is provided on the side of the buckle bracket 114 near the middle plate 112, and a first groove 1122 is provided on the side of the middle plate 112 near the buckle bracket 114. The second protrusion 1141 is adapted to the first groove 1122.

[0049] The buckle bracket 114 is connected and fixed to the middle plate 112 through the second protrusion 1141 and the first groove 1122.

[0050] To ensure the stability of the first base plate 111, the middle plate 112, the first upper plate 113, and the snap-fit ​​bracket 114, such as Figure 3 , Figure 4 As shown, a second protrusion 1141 can be provided on the side of the snap-fit ​​bracket 114 near the middle plate 112, and a first groove 1122 can be provided on the side of the middle plate 112 near the snap-fit ​​bracket 114. By adapting the second protrusion 1141 to the first groove 1122, the stability of the middle plate 112 and the snap-fit ​​bracket 114 can be effectively guaranteed.

[0051] By setting multiple first protrusions 1111 on the first base plate 111, and making the inner perimeter of each first protrusion 1111 greater than or equal to the outer perimeter of the side of the buckle bracket 114 close to the first base plate 111, the lithium battery 40 can be prevented from shifting when it is placed in the space enclosed by each first protrusion 1111 and pressure is applied.

[0052] When placing the lithium battery 40, you can follow the instructions. Figure 7 The lithium battery 40 is placed in the position shown, so that the clip bracket 114 contacts the working electrode 41, and the first base plate 111 contacts the counter electrode 43 and the reference electrode 44 of the lithium battery 40.

[0053] Optionally, the battery load application module 11 also includes a pressure sensor 115, and a second groove 1123 is provided on the side of the middle plate 112 away from the snap bracket 114. The pressure sensor 115 is installed in the second groove 1123.

[0054] The first upper plate 113 is in contact with the pressure sensor 115. A nut 13 is provided on the threaded post 12 that passes through the first upper plate 113, away from the pressure sensor 115. The load on the lithium battery 40 in the snap bracket 114 can be changed by adjusting the nut 13.

[0055] Please see Figure 2 as well as Figure 3A second groove 1123 can be provided on the middle plate 112, and the pressure sensor 115 can be installed in the second groove 1123, so that the first upper plate 113 is in contact with the middle plate 112. When the nut 13 on the first upper plate 113 is tightened, the pressure on the lithium battery 40 can be obtained through the pressure sensor 115, which further facilitates the research of researchers and the adjustment of the pressure.

[0056] Optionally, the battery load application module 11 includes a second base plate 311, a second upper plate 312, and a square hole fixing bracket 313.

[0057] The second base plate 311 and the second upper plate 312 are connected in sequence by threaded posts 12, and the square hole fixing bracket 313 is disposed between the second base plate 311 and the second upper plate 312.

[0058] The square hole fixing bracket 313 is a hollow bracket, and the square hole fixing bracket 313 is connected to the second upper plate 312 through a connector.

[0059] In another implementation, such as Figure 5 As shown, the battery load application module 11 can be configured to include a second base plate 311, a second upper plate 312, and a square hole fixing bracket 313. When the nut 13 on the second upper plate 312 is tightened, the pressure of the second upper plate 312 is transmitted to the square hole fixing bracket 313 through the elastic element, and further transmitted to the lithium battery 40. This design allows the pressure on the lithium battery 40 to be determined by the deformation length of the elastic element.

[0060] Optionally, a second observation hole 3121 is provided on the second upper plate 312 and the square hole fixing bracket 313 respectively, and the second observation hole 3121 is located on the observation path of the observation mechanism 30.

[0061] The second base plate 311 is provided with a plurality of third protrusions 3111, and the inner circumference of each third protrusion 3111 is greater than or equal to the outer circumference of the side of the square hole fixing bracket 313 near the second base plate 311.

[0062] The lithium battery 40 is installed in the space enclosed by the third protrusions 3111, and is located between the second base plate 311 and the square hole fixing bracket 313.

[0063] Similar to the first observation hole 1121, second observation holes 3121 are respectively opened on the second upper plate 312 and the square hole fixing bracket 313, which can also facilitate the observation mechanism 30 to observe lithium deposition from the vertical direction. A plurality of third protrusions 3111 are set on the second bottom plate 311, and the inner perimeter of the first protrusions 1111 is greater than or equal to the outer perimeter of the side of the square hole fixing bracket 313 close to the second bottom plate 311. When the lithium battery 40 is placed in the space enclosed by the third protrusions 3111 and pressure is applied, the displacement of the lithium battery 40 can be prevented.

[0064] Optionally, the battery load application module 11 also includes a plurality of first bolts 314, a plurality of second bolts 315, and a plurality of springs 316.

[0065] The number of first bolts 314, the number of second bolts 315, and the number of springs 316 are all the same.

[0066] Each first bolt 314 is installed through the square hole fixing bracket 313, and each second bolt 315 is installed through the second upper plate 312, with each first bolt 314 and each second bolt 315 facing each other.

[0067] Each first bolt 314 is elastically connected to a second bolt 315 via a spring 316, which is located between the second upper plate 312 and the square hole fixing bracket 313.

[0068] like Figure 6 As shown, in an optional embodiment, a plurality of first bolts 314 can be provided on the square hole fixing bracket 313, and a plurality of second bolts 315 corresponding to the first bolts 314 can be provided on the second upper plate 312. A spring 316 is provided between each pair of corresponding first bolts 314 and second bolts 315 so that the first bolts 314 and the corresponding second bolts 315 are elastically connected.

[0069] The above-described solutions in the embodiments of this utility model have at least the following beneficial effects: A lithium-ion battery observation device is constructed, comprising a lithium-ion plating mechanism, a container mechanism, and an observation mechanism. The battery is mounted on the lithium-ion plating mechanism and placed in the container mechanism, and the electrolyte is poured into the container and sealed. The observation mechanism then performs in-situ optical observation of the lithium-ion battery plating process. The device is simple in structure, inexpensive, requires undemanding observation conditions, and is easy to operate.

[0070] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery lithium plating observation device, characterized in that, The battery lithium plating observation device (01) includes a battery lithium plating mechanism (10), a holding mechanism (20), and an observation mechanism (30). The battery lithium plating mechanism (10) includes a battery load application module (11). The container (20) contains electrolyte; The lithium plating mechanism (10) is placed inside the container (20), the battery load application module (11) is immersed in the electrolyte, and a lithium battery (40) is placed on the battery load application module (11). The observation mechanism (30) is fixed to the outside of the container (20), and the viewing angle of the observation mechanism (30) is directly facing the lithium battery (40).

2. The battery lithium plating observation device as described in claim 1, characterized in that, The battery lithium plating mechanism (10) also includes at least two threaded posts (12) and multiple nuts (13). The threaded post (12) is disposed through the battery load application module (11); Each of the threaded posts (12) is provided with a plurality of nuts (13).

3. The battery lithium plating observation device as described in claim 2, characterized in that, The battery load application module (11) includes a first base plate (111), a middle plate (112), a first upper plate (113), and a buckle bracket (114). The first base plate (111), the middle plate (112) and the first upper plate (113) are connected in sequence by the threaded post (12), and the middle plate (112) is disposed between the first base plate (111) and the first upper plate (113); The buckle bracket (114) is a hollow U-shaped bracket, and the buckle bracket (114) is disposed between the middle plate (112) and the first bottom plate (111).

4. The battery lithium plating observation device as described in claim 3, characterized in that, The first upper plate (113) and the middle plate (112) are respectively provided with a first observation hole (1121), and the first observation hole (1121) is located on the observation path of the observation mechanism (30); The first base plate (111) is provided with a plurality of first protrusions (1111), and the inner perimeter of each first protrusion (1111) is greater than or equal to the outer perimeter of the side of the buckle bracket (114) close to the first base plate (111). The lithium battery (40) is installed in the space enclosed by each of the first protrusions (1111) and is located between the first base plate (111) and the buckle bracket (114); The buckle bracket (114) has a second protrusion (1141) on the side near the middle plate (112), and the middle plate (112) has a first groove (1122) on the side near the buckle bracket (114). The second protrusion (1141) is adapted to the first groove (1122). The buckle bracket (114) and the middle plate (112) are connected and fixed by the second protrusion (1141) and the first groove (1122).

5. The battery lithium plating observation device as described in claim 4, characterized in that, The battery load application module (11) also includes a pressure sensor (115), and a second groove (1123) is provided on the side of the middle plate (112) away from the buckle bracket (114). The pressure sensor (115) is installed in the second groove (1123); The first upper plate (113) is in contact with the pressure sensor (115). A nut (13) is provided on the threaded post (12) that passes through the first upper plate (113) on the side away from the pressure sensor (115). The load on the lithium battery (40) in the buckle bracket (114) can be changed by adjusting the nut (13).

6. The battery lithium plating observation device as described in claim 2, characterized in that, The battery load application module (11) includes a second base plate (311), a second upper plate (312), and a square hole fixing bracket (313). The second base plate (311) and the second upper plate (312) are connected in sequence by the threaded post (12), and the square hole fixing bracket (313) is disposed between the second base plate (311) and the second upper plate (312); The square hole fixing bracket (313) is a hollow bracket, and the square hole fixing bracket (313) is connected to the second upper plate (312) through a connector.

7. The battery lithium plating observation device as described in claim 6, characterized in that, The second upper plate (312) and the square hole fixing bracket (313) are respectively provided with a second observation hole (3121), and the second observation hole (3121) is located on the observation route of the observation mechanism (30); The second base plate (311) is provided with a plurality of third protrusions (3111), and the inner perimeter of each third protrusion (3111) is greater than or equal to the outer perimeter of the side of the square hole fixing bracket (313) close to the second base plate (311). The lithium battery (40) is installed in the space enclosed by each of the third protrusions (3111) and is located between the second base plate (311) and the square hole fixing bracket (313).

8. The battery lithium plating observation device as described in claim 7, characterized in that, The battery load application module (11) also includes a plurality of first bolts (314), a plurality of second bolts (315), and a plurality of springs (316). The number of the first bolt (314), the number of the second bolt (315), and the number of the spring (316) are all the same; Each of the first bolts (314) is disposed through the square hole fixing bracket (313), and each of the second bolts (315) is disposed through the second upper plate (312), and each of the first bolts (314) and each of the second bolts (315) are opposite to each other; Each of the first bolts (314) is elastically connected to a second bolt (315) via a spring (316) located between the second upper plate (312) and the square hole fixing bracket (313).

9. The battery lithium plating observation device as described in claim 1, characterized in that, The container (20) includes a transparent glass container (22) and a transparent glass lid (23); The transparent glass cover (23) is positioned opposite the bottom of the transparent glass container (22).

10. The battery lithium plating observation device as described in claim 1, characterized in that, The lithium battery (40) includes a working electrode (41), a separator (42), a counter electrode (43), a reference electrode (44), a copper mesh (45), and multiple wires (46). The counter electrode (43) and the reference electrode (44) are located in the same plane; The working electrode (41) has two layers, and the copper mesh (45) is located between the two layers of the working electrode (41); The diaphragm (42) is disposed between the working electrode (41) and the counter electrode (43) / reference electrode (44); There are three wires (46). One end of each wire (46) is electrically connected to the working electrode (41), the counter electrode (43), and the reference electrode (44), respectively. The other end of each wire (46) passes through the container (20) and is connected to the outside.

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