A mold for in-situ raman spectrum test of all-solid-state lithium battery

Abstract

The utility model belongs to the battery material test technical field, concretely is a kind of mould for in-situ raman spectrum test of all-solid-state lithium battery, and upper electrode post ram is inserted by one end of quartz cell shell, and upper electrode post column top is sealed and is inserted with the one end of quartz cell shell, and upper wire interface for connecting lead wire is set up on upper electrode post;Lower electrode post ram is inserted by the other end of quartz cell shell, and lower electrode post column top is sealed and is inserted with the other end of quartz cell shell, and lower wire interface for connecting lead wire is set up on lower electrode post;Battery assembly is placed inside quartz cell shell, and battery assembly is located between upper electrode post ram and lower electrode post ram, and respectively with upper electrode post ram and lower electrode post ram abut, and observation window is equipped in the position corresponding with battery assembly on quartz cell shell.The utility model can directly assemble battery, and the change of battery assembly in the working process of battery is observed through side observation window, with the advantages of convenient assembly and easy operation.

Description

Technical Field

[0001] This invention belongs to the field of battery material testing technology, specifically a mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries. Background Technology

[0002] The development of high-ionic-conductivity inorganic solid-state electrolytes has greatly promoted the advancement of all-solid-state lithium battery technology. Due to the higher chemical stability, non-flowability, and non-flammability of solid-state electrolytes, this novel secondary energy storage battery technology holds the promise of overcoming the energy density and safety bottlenecks of liquid batteries. Currently, Li3PS4, Li6PS5Cl, and Li... 10 GeP2S 12 Sulfated solid electrolytes, represented by [examples of solid electrolytes], are among the solid electrolytes with great application potential.

[0003] However, with in-depth research, more and more studies have revealed that sulfide electrolytes undergo complex structural changes and even fail during battery operation. Furthermore, the ion transport and decomposition mechanisms of different types of electrolytes vary significantly across different battery structures. Conventional material characterization techniques mostly only analyze the physical properties of materials under specific conditions, lacking the ability to monitor the spatial and temporal changes in the electrolyte's microstructure and composition. Therefore, an increasing number of researchers plan to develop various in-situ battery molds, combining techniques such as XRD (X-ray diffraction), electron microscopy, and Raman spectroscopy to observe the structural and chemical composition changes of electrolyte materials during battery operation, thereby deepening our understanding of the ion transport and decomposition mechanisms of electrolytes.

[0004] In-situ Raman spectroscopy is frequently used to observe structural changes in battery materials and reaction processes at specific locations during battery operation. For example, a utility model patent, CN210775224U, published on June 16, 2020, discloses an in-situ Raman spectroscopy testing mold for battery electrochemistry. Similarly, extensive research has verified that Raman spectroscopy has extremely high sensitivity to changes in key components in sulfide solid electrolytes. For example, a utility model patent, CN216958150U, published on July 12, 2022, discloses an all-solid-state battery reaction chamber system for in-situ Raman testing. It is evident that most in-situ Raman molds have openings on the electrode side to observe structural and compositional changes in the active material, electrolyte, and their interface within the electrode. These molds must ensure sufficient conductive pathways on the electrode side while also providing ample space for laser irradiation of the sample surface, posing significant challenges to mold design and material selection. It is generally believed that the sulfides in the electrolyte layer are far from the electrodes where redox reactions occur, and therefore are often considered structurally stable. Increasing research has revealed that sulfide electrolytes located in the electrolyte layer are also prone to structural degradation during battery operation, and this structural degradation behavior is significantly correlated with battery performance. However, most existing mold designs neglect the electrolyte layer, thus necessitating the design and development of relevant solid-state battery molds. Utility Model Content

[0005] To address the aforementioned problems with existing in-situ Raman spectroscopy molds, the purpose of this invention is to provide a mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries. This mold can detect changes in the electrolyte layer structure from the side. The quartz battery casing has extremely high transmittance for the laser used in Raman spectroscopy testing. By combining it with existing Raman testing instruments, non-destructive in-situ testing of key battery structures can be achieved.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] This utility model includes an upper electrode post, a lower electrode post, and a quartz battery casing. The quartz battery casing is a hollow structure with openings at both ends. The upper electrode post includes an integrally formed or mutually fixed upper electrode post top and an upper electrode post pressure head. The upper electrode post pressure head is inserted into one end of the quartz battery casing. The upper electrode post top is located outside the quartz battery casing and is sealed and inserted into one end of the quartz battery casing. The upper electrode post has an upper wire interface for connecting leads. The lower electrode post includes an integrally formed or mutually fixed lower electrode post top and a lower electrode post pressure head. The lower electrode post pressure head is inserted into the other end of the quartz battery casing. The lower electrode post top is located outside the quartz battery casing and is sealed and inserted into the other end of the quartz battery casing. The lower electrode post has a lower wire interface for connecting leads. A battery assembly is placed inside the quartz battery casing. The battery assembly is located between the upper electrode post pressure head and the lower electrode post pressure head, and abuts against both the upper and lower electrode post pressure heads respectively. An observation window is provided on the quartz battery casing at a position corresponding to the battery assembly.

[0008] Wherein: the end face of the upper electrode post that contacts the quartz battery casing is recessed in the direction away from the quartz battery casing, thereby forming an upper electrode post groove. The upper electrode post groove is located on the periphery of the junction between the upper electrode post top and the upper electrode post pressure head. After the upper electrode post pressure head is inserted into the quartz battery casing, one end of the quartz battery casing is inserted into the upper electrode post groove, and the end face of one end of the quartz battery casing abuts against the bottom of the groove. An upper sealing ring is sleeved on one end of the quartz battery casing. The upper sealing ring is housed in the upper electrode post groove to ensure the airtightness of the positive electrode side of the battery.

[0009] The width of the groove in the upper electrode post is less than or equal to the outer diameter of the upper sealing ring after it is fitted onto the quartz battery casing.

[0010] The axial cross-section of the upper electrode post is "T" shaped, with the horizontal side of the "T" shape being the top of the upper electrode post and the vertical side of the "T" shape being the pressure head of the upper electrode post; an upper wire interface is radially provided on the outer side of the top of the upper electrode post.

[0011] The end face of the lower electrode post that contacts the quartz battery casing is recessed in a direction away from the quartz battery casing, thereby forming a lower electrode post groove. The lower electrode post groove is located on the periphery of the junction between the lower electrode post top and the lower electrode post pressure head. After the lower electrode post pressure head is inserted into the quartz battery casing, the other end of the quartz battery casing is inserted into the lower electrode post groove, and the end face of the other end of the quartz battery casing abuts against the bottom of the lower electrode post groove. A lower sealing ring is sleeved on the other end of the quartz battery casing, and the lower sealing ring is housed in the lower electrode post groove to ensure the airtightness of the negative electrode side of the battery.

[0012] The width of the groove in the lower electrode post is less than or equal to the outer diameter of the lower sealing ring after it is fitted onto the quartz battery casing.

[0013] The axial cross-section of the lower electrode post is "T" shaped, with the horizontal side of the "T" shape being the top of the lower electrode post and the vertical side of the "T" shape being the pressure head of the lower electrode post; a lower wire interface is radially provided on the outer side of the top of the lower electrode post.

[0014] The length of the upper electrode post indenter is equal to the length of the lower electrode post indenter. The total length of the upper electrode post indenter, the battery assembly, and the lower electrode post indenter is equal to the length of the quartz battery casing, thereby enabling the battery assembly to be located in the middle of the quartz battery casing. The opening length of the observation window is greater than the length of the battery assembly.

[0015] The battery assembly includes a solid electrolyte layer and positive and negative electrode plates located at both ends of the solid electrolyte layer. The upper electrode post pressure head abuts against the positive electrode plate, and the lower electrode post pressure head abuts against the negative electrode plate.

[0016] The battery assembly is fabricated in a quartz battery casing. The fabricated battery assembly and the mold are placed together in a pressure frame. The pressure frame has a pressure screw hole. A fixing screw is screwed into the pressure screw hole to fix the mold and maintain pressure. An insulating gasket is provided between one end of the mold and the pressure frame, and an insulating gasket is provided between the other end of the mold and the fixing screw and the pressure frame.

[0017] The advantages and positive effects of this utility model are as follows:

[0018] 1. The mold provided by this utility model can directly assemble batteries, and observe the characteristic structural changes of the solid electrolyte and the compositional changes of the electrolyte layer and electrode interface during battery operation through the side observation window. It has the advantages of convenient assembly and easy operation.

[0019] 2. This utility model is an improvement on the existing design practices of all-solid-state lithium batteries. The mold for pressing the battery is both a sample preparation mold and a Raman observation mold. There is no need for an additional battery pressing mold to pre-press the battery assembly, which reduces the loss and damage of the battery assembly during the transfer process.

[0020] 3. This invention optimizes the solid-state battery casing material to quartz and grinds a flat area in the middle to serve as an observation window, facilitating battery fabrication and testing. Quartz material possesses excellent mechanical and chemical stability and good light transmittance across a wide wavelength range of laser light. Side observation not only allows observation of the electrolyte layer but also helps in observing the microstructural changes at the interfaces between the positive and electrolyte electrodes, and between the negative and electrolyte electrodes.

[0021] 4. The battery size using the mold of this utility model can be flexibly designed, making it easy to design the battery size according to the actual situation of different brands and models of Raman equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the upper electrode post of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the lower electrode post of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the quartz battery casing of this utility model;

[0026] Figure 5 This is a schematic diagram of the upper sealing ring of this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the lower sealing ring of this utility model;

[0028] Figure 7 This is a schematic diagram of the pressure frame of this utility model;

[0029] Figure 8 This is a schematic diagram of the battery assembly of this utility model;

[0030] Figure 9 This is one of the schematic diagrams illustrating the assembly process of this utility model;

[0031] Figure 10 This is the second schematic diagram of the assembly process of this utility model;

[0032] Figure 11 This is the third schematic diagram of the assembly process of this utility model;

[0033] Figure 12 This is the fourth schematic diagram of the assembly process of this utility model;

[0034] Figure 13 This is a top view of the battery structure after assembly.

[0035] Figure 14 The image shows the charge and discharge test results of the in-situ Raman cell assembled using this invention (the cell structure is LiCoO2|Li6PS5Cl|LiIn).

[0036] Figure 15 The image shows the Raman test results of the in-situ Raman cell assembled using this invention (the cell structure is LiCoO2|Li6PS5Cl|LiIn).

[0037] Wherein: 1 is the upper electrode post, 101 is the top of the upper electrode post, 102 is the pressure head of the upper electrode post, 103 is the upper wire interface, 104 is the groove of the upper electrode post, 2 is the lower electrode post, 201 is the top of the lower electrode post, 202 is the pressure head of the lower electrode post, 203 is the lower wire interface, 204 is the groove of the lower electrode post, 3 is the quartz battery casing, 301 is the observation window, 4 is the upper sealing ring, 5 is the lower sealing ring, 6 is the battery assembly, 601 is the positive electrode plate, 602 is the solid electrolyte layer, 603 is the negative electrode plate, 7 is the pressure frame, 701 is the pressure screw hole, 8 is the fixing screw, 9 is the insulating gasket, 10 is the lead wire, and 11 is the laser beam spot. Detailed Implementation

[0038] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0039] like Figures 1-8 As shown, this utility model includes an upper electrode post 1, a lower electrode post 2, and a quartz battery casing 3. The quartz battery casing 3 is a hollow structure with openings at both ends. The upper electrode post 1 includes an integrally formed or mutually fixed upper electrode post top 101 and an upper electrode post pressure head 102. The upper electrode post pressure head 102 is inserted into one end of the quartz battery casing 3. The upper electrode post top 101 is located outside the quartz battery casing 3 and is sealed and inserted into one end of the quartz battery casing 3. The upper electrode post 1 has an upper wire interface 103 for connecting the lead wire 10. The lower electrode post 2 includes an integrally formed or mutually fixed lower electrode post top 201. The lower electrode post 202 is inserted from the other end of the quartz battery casing 3. The top 201 of the lower electrode post is located outside the quartz battery casing 3 and is sealed and plugged into the other end of the quartz battery casing 3. The lower electrode post 2 is provided with a lower wire interface 203 for connecting the lead wire 10. The battery assembly 6 is placed inside the quartz battery casing 3. The battery assembly 6 is located between the upper electrode post 102 and the lower electrode post 202 and abuts against the upper electrode post 102 and the lower electrode post 202 respectively. An observation window 301 is provided on the quartz battery casing 3 at the position corresponding to the battery assembly 6.

[0040] In this embodiment, the top of the upper electrode post 101 and the pressure head of the upper electrode post 102 are integrally formed structures made of stainless steel. The axial cross-section of the upper electrode post 1 is "T"-shaped, with the horizontal side of the "T" being the top of the upper electrode post 101 and the vertical side being the pressure head of the upper electrode post 102; that is, the top of the upper electrode post 101 can be a disc or a square disc, and the pressure head of the upper electrode post 102 can be a cylinder or a square cylinder (in this embodiment, the top of the upper electrode post 101 is a disc, and the pressure head of the upper electrode post 102 is a cylinder). An upper wire interface 103 is radially provided on the outer surface of the top of the upper electrode post 101.

[0041] In this embodiment, the end face of the upper electrode post 101 that contacts the quartz battery casing 3 is recessed in a direction away from the quartz battery casing 3, thereby forming an upper electrode post groove 104. The upper electrode post groove 104 is located around the junction of the upper electrode post 101 and the upper electrode post pressure head 102. After the upper electrode post pressure head 102 is inserted into the quartz battery casing 3, one end of the quartz battery casing 3 is inserted into the upper electrode post groove 104, and the end face of one end of the quartz battery casing 3 abuts against the bottom of the groove 104. An upper sealing ring 4 is sleeved on one end of the quartz battery casing 3, and the upper sealing ring 4 is accommodated in the upper electrode post groove 104. In this embodiment, the width of the upper electrode post groove 104 is less than or equal to the outer diameter of the upper sealing ring 4 after it is sleeved on the quartz battery casing 3, ensuring the airtightness of the positive electrode side of the battery.

[0042] In this embodiment, the lower electrode post top 201 and the lower electrode post pressure head 202 are integrally formed structures made of stainless steel. The axial cross-section of the lower electrode post 2 is "T"-shaped, with the horizontal side of the "T" being the lower electrode post top 201 and the vertical side being the lower electrode post pressure head 202; that is, the lower electrode post top 201 can be a disc or a square disc, and the lower electrode post pressure head 202 can be a cylinder or a square cylinder (in this embodiment, the lower electrode post top 201 is a disc, and the lower electrode post pressure head 202 is a cylinder). A lower wire interface 203 is radially provided on the outer surface of the lower electrode post top 201.

[0043] In this embodiment, the end face of the lower electrode post top 201 that contacts the quartz battery casing 3 is recessed in a direction away from the quartz battery casing 3, thereby forming a lower electrode post groove 204. The lower electrode post groove 204 is located around the junction of the lower electrode post top 201 and the lower electrode post pressure head 202. After the lower electrode post pressure head 202 is inserted into the quartz battery casing 3, the other end of the quartz battery casing 3 is inserted into the lower electrode post groove 204, and the end face of the other end of the quartz battery casing 3 abuts against the bottom of the groove of the lower electrode post 204. A lower sealing ring 5 is sleeved on the other end of the quartz battery casing 3, and the lower sealing ring 5 is accommodated in the lower electrode post groove 204. In this embodiment, the width of the lower electrode post groove 204 is less than or equal to the outer diameter of the lower sealing ring 5 after it is sleeved on the quartz battery casing 3, ensuring the airtightness of the negative electrode side of the battery.

[0044] The quartz battery casing 3 can be a hollow cylinder or a square prism. In this embodiment, the quartz battery casing 3 is a hollow cylinder with openings at both ends. The length of the upper electrode indenter 102 is equal to the length of the lower electrode indenter 202. The total length of the upper electrode indenter 102, the battery assembly 6, and the lower electrode indenter 202 is equal to the length of the quartz battery casing 3, thereby ensuring that the battery assembly 6 is located in the middle of the quartz battery casing 3. The outer surface of the quartz battery casing 3 is ground flat at the middle position to serve as an observation window 301, which facilitates the preparation and testing of the battery. The opening length of the observation window 301 is greater than the length of the battery assembly 6.

[0045] The battery assembly 6 of this embodiment includes a solid electrolyte layer 602 and positive electrode plates 601 and negative electrode plates 603 located at both ends of the solid electrolyte layer 602. The upper electrode post pressure head 102 abuts against the positive electrode plate 601, and the lower electrode post pressure head 202 abuts against the negative electrode plate 603. In this embodiment, the solid electrolyte layer is in the middle of the battery assembly 6, and the positive electrode plate 601 and negative electrode plate 603 are located on both sides of the solid electrolyte layer. The positive electrode plate 601, the solid electrolyte layer, and the negative electrode plate 603 have the same diameter. The positive electrode plate 601 is LiCoO2 + Li6PS5Cl (mass ratio 7:3), and the total amount of the positive electrode plate 601 is 10mg. The amount of Li6PS5Cl in the solid electrolyte layer is 80mg. The negative electrode plate 603 is formed by pressing lithium metal sheets and indium metal sheets, and after pressing, the indium metal sheet is in contact with the solid electrolyte layer.

[0046] like Figure 13 As shown, in this embodiment, the battery assembly 6 is prepared in the quartz battery casing 3. The prepared battery assembly 6 and the mold are placed together in the pressure frame 7. The pressure frame 7 has a pressure screw hole 701. The mold is fixed by screwing in the fixing screw 8 through the pressure screw hole 701 and maintaining pressure. An insulating gasket 9 is provided between one end of the mold and the pressure frame 7, and an insulating gasket 9 is provided between the other end of the mold and the fixing screw 8 and the pressure frame 7. The insulating gasket 9 is used to prevent the battery from short-circuiting.

[0047] The working principle of this utility model is as follows:

[0048] The lower pressure head 202 of the lower electrode post 2 is inserted into the lower end of the quartz battery casing 3, and the lower end face of the quartz battery casing 3 abuts against the bottom of the groove 204 of the lower electrode post 2. Electrolyte powder is poured in through the upper end of the quartz battery casing 3, and then the upper pressure head 102 of the upper electrode post 1 is inserted into the upper end of the quartz battery casing 3 and pressure is applied to compact the solid electrolyte layer 602 (e.g., ...). Figure 9 (As shown); remove the upper electrode post 2, pour composite positive electrode powder into the upper electrode post 1 from the top of the quartz cell casing 3, and then put the upper electrode post 1 back in. Compact the positive electrode sheet 601 with the solid electrolyte layer 602 (as shown). Figure 10(As shown); remove the lower electrode post 2, insert the negative electrode 603 from the bottom of the quartz cell casing 3, then insert the lower electrode post 2 and apply pressure to compact the negative electrode 603 and the solid electrolyte layer 602 (as shown). Figure 11 (As shown). Remove the lower electrode post 2, insert the upper sealing ring 4 from the lower end of the quartz battery casing 3, and move the upper sealing ring 4 into the upper electrode post groove 104 on the upper electrode post 1 to achieve a seal between the upper electrode post 1 and the quartz battery casing 3; then, insert the lower sealing ring 5 from the lower end of the quartz battery casing 3, reinsert the lower electrode post 2, and move the lower sealing ring 5 into the lower electrode post groove 204 on the lower electrode post 2 to achieve a seal between the lower electrode post 2 and the quartz battery casing 3 (as shown). Figure 12 (As shown). Subsequently, the entire mold is transferred to the pressure frame 7, and screws are tightened into the pressure screw holes 701 to secure it and maintain pressure. An insulating gasket 9 is provided between the mold, the pressure frame 7, and the fixing screws 8 to prevent short circuits in the battery (e.g., ...). Figure 13 (As shown).

[0049] The positive and negative leads 10 are led out from the upper wire interface 103 on the upper electrode post 1 and the lower wire interface 203 on the lower electrode post 2, respectively, and connected to the battery testing system. The battery assembly 6 is located in the center of the observation window 301, and the positive electrode 601, the solid electrolyte layer 602, and the negative electrode 603 can be clearly distinguished. The mold is placed flat under the test lens of the Raman test system, and the laser beam spot 11 can be used to select the region of interest for testing by adjusting the position of the operating table.

[0050] Figure 14 The charge and discharge data of the battery assembled using this invention are presented. At room temperature and a charge / discharge rate of 0.2 C, the LiCoO2|Li6PS5Cl|LiIn battery exhibits a charge specific capacity of 121 mAh / g and a discharge specific capacity of 101 mAh / g. The battery performance is similar to that of batteries assembled using conventional molds, demonstrating that the battery of this invention can guarantee effective battery operation.

[0051] Figure 15 The in-situ Raman test results are shown for the battery assembled using this invention. The battery structure is LiCoO2|Li6PS5Cl|LiIn. The test object is the electrolyte layer 602. The test results clearly show PS4. 3- The changes in the diffraction peaks as the battery operates demonstrate the effectiveness of this invention.

[0052] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries, characterized in that: The battery includes an upper electrode post (1), a lower electrode post (2), and a quartz battery casing (3). The quartz battery casing (3) is a hollow structure with openings at both ends. The upper electrode post (1) includes an integrally formed or mutually fixed upper electrode post top (101) and an upper electrode post pressure head (102). The upper electrode post pressure head (102) is inserted into one end of the quartz battery casing (3). The upper electrode post top (101) is located outside the quartz battery casing (3) and is sealed and inserted into one end of the quartz battery casing (3). The upper electrode post (1) has an upper wire interface (103) for connecting the lead wire (10). The lower electrode post (2) includes an integrally formed or mutually fixed lower electrode post top (201) and a lower electrode post pressure head. (202), the lower electrode post pressure head (202) is inserted from the other end of the quartz battery casing (3), the top of the lower electrode post (201) is located outside the quartz battery casing (3) and is sealed and plugged into the other end of the quartz battery casing (3), and the lower electrode post (2) is provided with a lower wire interface (203) for connecting the lead wire (10); the quartz battery casing (3) contains a battery assembly (6), the battery assembly (6) is located between the upper electrode post pressure head (102) and the lower electrode post pressure head (202), and abuts against the upper electrode post pressure head (102) and the lower electrode post pressure head (202) respectively, and the quartz battery casing (3) is provided with an observation window (301) at the position corresponding to the battery assembly (6).

2. The mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries according to claim 1, characterized in that: The end face of the upper electrode post top (101) that contacts the quartz battery casing (3) is recessed away from the quartz battery casing (3), thereby forming an upper electrode post groove (104). The upper electrode post groove (104) is located on the periphery of the junction between the upper electrode post top (101) and the upper electrode post pressure head (102). After the upper electrode post pressure head (102) is inserted into the quartz battery casing (3), one end of the quartz battery casing (3) is inserted into the upper electrode post groove (104), and the end face of one end of the quartz battery casing (3) abuts against the bottom of the groove of the upper electrode post (104). An upper sealing ring (4) is provided on one end of the quartz battery casing (3). The upper sealing ring (4) is housed in the upper electrode post groove (104) to ensure the airtightness of the positive electrode side of the battery.

3. The mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries according to claim 2, characterized in that: The width of the groove (104) of the upper electrode post is less than or equal to the outer diameter of the upper sealing ring (4) after it is fitted onto the quartz battery casing (3).

4. The mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries according to claim 1, characterized in that: The axial section of the upper electrode post (1) is "T" shaped, the horizontal side of the "T" shape is the top of the upper electrode post (101), and the vertical side of the "T" shape is the pressure head of the upper electrode post (102); an upper wire interface (103) is radially opened on the outer side of the top of the upper electrode post (101).

5. The mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries according to claim 1, characterized in that: The end face of the lower electrode post top (201) that contacts the quartz battery casing (3) is recessed away from the quartz battery casing (3), thereby forming a lower electrode post groove (204). The lower electrode post groove (204) is located on the periphery of the junction of the lower electrode post top (201) and the lower electrode post pressure head (202). After the lower electrode post pressure head (202) is inserted into the quartz battery casing (3), the other end of the quartz battery casing (3) is inserted into the lower electrode post groove (204), and the other end face of the quartz battery casing (3) abuts against the bottom of the groove of the lower electrode post groove (204). A lower sealing ring (5) is provided on the other end of the quartz battery casing (3). The lower sealing ring (5) is housed in the lower electrode post groove (204) to ensure the airtightness of the negative electrode side of the battery.

6. The mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries according to claim 5, characterized in that: The width of the groove (204) of the lower electrode post is less than or equal to the outer diameter of the lower sealing ring (5) after it is fitted onto the quartz battery casing (3).

7. The mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries according to claim 1, characterized in that: The axial cross section of the lower electrode post (2) is "T" shaped, the horizontal side of the "T" shape is the top of the lower electrode post (201), and the vertical side of the "T" shape is the pressure head of the lower electrode post (202); a lower wire interface (203) is radially opened on the outer side of the top of the lower electrode post (201).

8. The mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries according to claim 1, characterized in that: The length of the upper electrode post indenter (102) is equal to the length of the lower electrode post indenter (202). The total length of the upper electrode post indenter (102), the battery assembly (6), and the lower electrode post indenter (202) is equal to the length of the quartz battery casing (3), thereby enabling the battery assembly (6) to be located in the middle of the quartz battery casing (3). The opening length of the observation window (301) is greater than the length of the battery assembly (6).

9. The mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries according to claim 1, characterized in that: The battery assembly (6) includes a solid electrolyte layer (602) and positive electrode plates (601) and negative electrode plates (603) located at both ends of the solid electrolyte layer (602). The upper electrode post indenter (102) abuts against the positive electrode plate (601), and the lower electrode post indenter (202) abuts against the negative electrode plate (603).

10. The mold for in-situ Raman spectroscopy testing of all-solid-state lithium batteries according to claim 1, characterized in that: The battery assembly (6) is prepared in the quartz battery casing (3). The prepared battery assembly (6) and the mold are placed together in the pressure frame (7). The pressure frame (7) has a pressure screw hole (701). The mold is fixed by screwing in the fixing screw (8) through the pressure screw hole (701) and maintaining pressure. An insulating gasket (9) is provided between one end of the mold and the pressure frame (7). An insulating gasket (9) is provided between the other end of the mold and the fixing screw (8) and the pressure frame (7).

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