All-solid-state battery mold

Abstract

According to the all-solid-state battery mold, tabletting of a solid electrolyte and assembling of an all-solid-state battery are achieved through a pressurizing device, the mold is connected with an electrochemical workstation through a tab, meanwhile, in-situ Raman and XRD characterization is achieved by replacing different test windows, and the whole process is achieved in the same mold. The influence of secondary transfer on all-solid-state battery testing is avoided, and all-solid-state battery working condition detection and in-situ characterization of various technologies of all-solid-state battery working condition detection are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of all-solid-state batteries, is suitable for in-situ optical microscope, Raman and XRD tests, and particularly relates to an all-solid-state battery mold. Background Art

[0002] At present, all-solid-state battery systems are still faced with the side reactions between electrolytes and high-voltage cathode materials under high pressure and the growth of lithium dendrites. How to detect the side reactions between electrodes and electrolyte materials and the structural evolution of cathode materials under in-situ working conditions during the charge and discharge process is of great significance for guiding the design of electrode materials and electrolytes and improving the performance of all-solid-state batteries. In existing in-situ technical characterization methods, the electrolyte is usually prepared externally and the battery is assembled, and then transferred to the in-situ characterization mold for in-situ testing. During this secondary transfer process, the battery pressure will be released, and the test cannot reflect the actual working state of the battery.

[0003] In existing all-solid-state battery molds, such as Chinese patent 202223058289.1, the electrode material is pressurized by tightening the screws. Although the electrolyte can be prepared and the battery can be assembled, only electrochemical performance tests can be performed, and in-situ multi-characterization tests such as Raman and XRD cannot be simultaneously satisfied. For an all-solid-state battery system, if you want to truly reflect the working state of the battery, it is far from enough to rely on a single detection method to detect electrode reactions and structural evolution.

[0004] Therefore, if a mold can be designed that can be used for the synthesis and assembly of all-solid-state batteries and can also be used to meet the requirements of various in-situ characterization technologies, it will not only greatly simplify the experimental process, but also avoid the interference caused by the secondary transfer of the battery to different in-situ molds for characterization, thereby ensuring the accuracy and reliability of the data. Summary of the invention

[0005] In view of the shortcomings of the background technology, the purpose of the utility model is to provide an all-solid-state battery mold.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An all-solid-state battery mold, comprising

[0008] A spectral cell body, wherein the spectral cell body is provided with a reaction channel running through it, a surface of the spectral cell body is provided with a groove, and a bottom of the groove is provided with a window communicating with the reaction channel;

[0009] A pressure device is arranged on both sides of the reaction channel, the pressure device includes a push rod device, part of the outer side of the push rod device is sealed and adapted to the reaction channel, and the push rod device can reciprocate in the reaction channel, the push rod device is made of conductive material, and the push rod device is provided with a pole ear for connecting to an electrochemical workstation;

[0010] A pressurizing device, one end of which is connected to a pressurizing device located at one side of the reaction channel, and the other end of which is connected to a pressurizing device located at the other side of the reaction channel, and the pressurizing device applies pressure to the two pressurizing devices to bring them closer to each other, thereby adjusting the pressure on the electrode material between the two pressurizing devices;

[0011] a synthetic cover, wherein the synthetic cover is connected to the groove during the process of pressing the electrode material in the reaction channel; and

[0012] A plurality of test windows are connected to the groove according to different characterization states.

[0013] Furthermore, the push rod device includes a base, a column is provided on one side of the base, the column is adapted to the shape of the reaction channel, and the column is movable and sealed to adapt to the reaction channel, and the pole ear is provided on the base.

[0014] Furthermore, the reaction channel is provided with an installation groove on its inner wall near the openings at both ends, and a sealing ring is provided in the installation groove, and the sealing ring is sealingly adapted to the column.

[0015] Furthermore, the pressure-applying device further comprises a pressure-applying sheet and an insulating sheet, and two ends of the insulating sheet are connected to the pressure-applying sheet and the base in a concave-convex manner respectively.

[0016] Furthermore, the pressure sheet is provided with a first receiving groove adapted to the shape of one side of the insulating sheet, the other side of the insulating sheet is provided with a second receiving groove, and the base is provided with a protrusion adapted to the second receiving groove.

[0017] Furthermore, a pressure sensor is provided in the first containing groove.

[0018] Furthermore, connecting holes are provided on both sides of the pressure plate, and the pressure device includes a pressure screw, which is passed through the connecting hole and is threadedly connected with a pressure nut. By rotating the pressure nut, the pressure devices located on both sides of the spectral pool body are brought closer to each other, thereby adjusting the pressure exerted on the clicking material between the two pressure devices.

[0019] Furthermore, the synthetic cover includes a baffle and a pressure cover, the shape of the baffle is adapted to the viewing window, the pressure cover is threadedly connected in the groove, and the pressure cover presses the baffle.

[0020] Furthermore, the test window includes a Raman cover and an XRD cover, and the Raman cover and the XRD cover are threadedly connected to the groove.

[0021] Furthermore, the Raman cover and the cover body are provided with a disassembly hole that can be snapped onto a wrench.

[0022] The beneficial effects of the utility model are:

[0023] 1. The all-solid-state battery mold proposed in the utility model realizes the pressing of solid electrolyte and the assembly of all-solid-state battery through a pressurizing device, and is connected to the electrochemical workstation through the pole ear. At the same time, in-situ Raman and XRD characterizations are realized by replacing different test windows. The whole process is realized in the same mold, avoiding the influence of secondary transfer on the all-solid-state battery test, and realizing the all-solid-state battery working condition detection and in-situ characterization of various technologies.

[0024] 2. The utility model proposes an all-solid-state battery mold, and the pressure device also includes a pressure plate and an insulating plate. The two ends of the insulating plate are respectively connected to the pressure plate and the base in a concave-convex manner to prevent relative displacement between the components during the pressurization process, which may lead to test failure.

[0025] 3. In the all-solid-state battery mold proposed by the present invention, a pressure sensor is provided in the first receiving groove, through which the influence of different pressures on the cycle behavior of the all-solid-state battery can be studied.

[0026] 4. The utility model proposes an all-solid-state battery mold, in which the composite cover includes a baffle and a pressure cover. The shape of the baffle is adapted to the viewing window, the pressure cover is threadedly connected in the groove, and the pressure cover presses the baffle to prevent the electrode material from leaking from the viewing window during the pressing process, resulting in the failure to obtain the cross-sectional shape of the motor material that meets the requirements.

[0027] 5. In the all-solid-state battery mold proposed by the utility model, the Raman cover and the cover body are provided with disassembly holes that can be snapped onto a wrench, and the Raman cover and the cover body can be quickly disassembled and assembled by the wrench, thereby improving the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is an exploded view of an all-solid-state battery mold of the utility model;

[0030] Figure 2 This is a cross-sectional view of an all-solid-state battery mold of the utility model;

[0031] Figure 3 It is a schematic diagram of a spectrum cell body of an all-solid-state battery mold of the utility model;

[0032] Figure 4 This is one of the schematic diagrams of the pressed electrode material of an all-solid-state battery mold of the utility model;

[0033] Figure 5 This is the second schematic diagram of the pressed electrode material of an all-solid-state battery mold of the utility model;

[0034] Figure 6 A schematic diagram of the Raman test state of an all-solid-state battery mold of the utility model;

[0035] Figure 7 This is a schematic diagram of the XRD test state of an all-solid-state battery mold of the utility model;

[0036] In the figure, 10, spectral cell body; 101, reaction channel; 1011, mounting groove; 102, groove; 103, window; 201, base; 2011, convex part; 202, column; 203, pole ear; 301, pressure plate; 3011, connecting hole; 302, insulating plate; 40, sealing ring; 501, pressure screw; 502, pressure nut; 601, first accommodating groove; 602, second accommodating groove; 701, baffle; 702, pressure cover; 80, Raman cover; 90, XRD cover; 100, disassembly hole; 110, wrench. DETAILED DESCRIPTION

[0037] Combine the following Figure 1-Figure 7 The utility model is described in detail.

[0038] An all-solid-state battery mold, comprising

[0039] The spectral cell body 10 is provided with a reaction channel 101 passing through the spectral cell body 10, a groove 102 is provided on the surface of the spectral cell body 10, and a window 103 connected to the reaction channel 101 is provided at the bottom of the groove 102;

[0040] A pressure device is provided on both sides of the reaction channel 101, and the pressure device includes a push rod device, the outer side of which is partially sealed and adapted to the reaction channel 101, and the push rod device can reciprocate in the reaction channel 101, and the push rod device is made of a conductive material, and the push rod device is provided with a pole ear 203 for connecting to an electrochemical workstation;

[0041] A pressurizing device, one end of which is connected to a pressurizing device located at one side of the reaction channel 101, and the other end of which is connected to a pressurizing device located at the other side of the reaction channel 101, and the pressurizing device applies pressure to the two pressurizing devices to bring them closer to each other, thereby adjusting the pressure on the electrode material between the two pressurizing devices;

[0042] A synthetic cover, which is connected to the groove 102 during the process of pressing the electrode material in the reaction channel 101; and

[0043] A plurality of test windows are connected to the groove 102 according to different characterization states.

[0044] Therefore, the all-solid-state battery mold proposed in the present invention realizes the pressing of solid electrolyte and the assembly of all-solid-state battery through a pressurizing device, and is connected to the electrochemical workstation through the tab 203. At the same time, in-situ Raman and XRD characterizations are realized by replacing different test windows. The entire process is realized in the same mold, avoiding the influence of secondary transfer on the all-solid-state battery test, and realizing the all-solid-state battery working condition detection and in-situ characterization of various technologies.

[0045] In this embodiment, the push rod device includes a base 201, a column 202 is provided on one side of the base 201, the column 202 is adapted to the shape of the reaction channel 101, the column 202 and the reaction channel 101 are mutually adapted quadrangular prisms, and the column 202 is movable and sealed to the reaction channel 101, and the pole ear 203 is provided on the base 201. The column 202 and the reaction channel 101. The reaction channel 101 is provided with an installation groove 1011 on the inner wall near the openings at both ends, and a sealing ring 40 is provided in the installation groove 1011, and the sealing ring 40 is sealed and adapted to the column 202.

[0046] In this embodiment, the pressure device also includes a pressure sheet 301 and an insulating sheet 302, and the two ends of the insulating sheet 302 are connected to the pressure sheet 301 and the base 201 by concave and convex fitting. The pressure sheet 301 is provided with a first receiving groove 601 adapted to the shape of one side of the insulating sheet 302, and the other side of the insulating sheet 302 is provided with a second receiving groove 602, and the base 201 is provided with a convex portion 2011 adapted to the second receiving groove 602, so as to prevent relative displacement between the components during the pressurization process, resulting in test failure. Furthermore, a pressure sensor is provided in the first receiving groove 601, through which the influence of different pressures on the cycle behavior of the all-solid-state battery can be studied.

[0047] In this embodiment, connecting holes 3011 are provided on both sides of the pressure plate 301, and the pressure device includes a pressure screw 501. The pressure screw 501 is inserted into the connecting hole 3011 and is threadedly connected with a pressure nut 502. By rotating the pressure nut 502, the pressure devices located on both sides of the spectral cell body 10 are brought closer to each other, thereby adjusting the pressure on the clicking material between the two pressure devices.

[0048] In this embodiment, the composite cover includes a baffle 701 and a pressure cover 702. The shape of the baffle 701 is adapted to the window 103. The pressure cover 702 is threadedly connected to the groove 102, and the pressure cover 702 presses the baffle 701 to prevent the electrode material from leaking from the window 103 during the pressing process, resulting in the failure to obtain the cross-sectional shape of the motor material that meets the requirements. When the cover body is connected to the groove 102, a sealing gasket with a thickness of less than 0.5 mm is provided between the cover body and the groove 102.

[0049] In this embodiment, the test window includes a Raman cover 80 and an XRD cover 90, and the Raman cover 80 and the XRD cover 90 are threadedly connected to the groove 102. When Raman characterization is performed, the Raman cover 80 is connected to the groove 102, and a quartz window with a thickness of less than 0.3 mm and a sealing gasket with a thickness of less than 0.5 mm are provided between the Raman cover 80 and the bottom wall of the groove 102; when XRD characterization is performed, the XRD cover 90 is connected to the groove 102, and a sealing gasket with a thickness of less than 0.5 mm is provided between the XRD cover 90 and the bottom wall of the groove 102.

[0050] In this embodiment, the Raman cover 80 and the cover body are provided with a disassembly hole 100 that can be snapped onto a wrench 110 .

[0051] The test method of the all-solid-state battery mold proposed in the present invention is as follows:

[0052] 1) Install a sealing gasket in the groove 102, place a baffle 701 in the window 103, and connect the cover to the groove 102 using a wrench 110;

[0053] 2) Insert the column 202 of one push rod device from one side of the reaction channel 101, put the solid electrolyte from the other side of the reaction channel 101, and then insert the column 202 of another push rod device from the other side of the reaction channel 101. The two push rod devices are respectively connected to the insulating sheets 302, and the two insulating sheets 302 are respectively connected to the pressure sheets 301. The mold is placed in a tablet press to complete the solid electrolyte tableting;

[0054] 3) Remove the ejector device at one end, remove the column 202 from the reaction channel 101, and then feed the positive electrode material into the reaction channel 101, as described in step 2), reinstall the ejector device, put the mold into the tablet press, and press the positive electrode material and the solid electrolyte tightly together;

[0055] 4) Remove the ejector device at the other end, feed the negative electrode material into the reaction channel 101, as described in step 2), reinstall the ejector device, put the mold into the tablet press, and press the negative electrode material and the solid electrolyte tightly together;

[0056] 5) When the tablet press is not depressurized, the pressure screw 501 is passed through the two pressure plates 301 and then threadedly connected to the pressure nut 502, and the pressure nut 502 is tightened to stabilize the pressure inside the all-solid-state battery;

[0057] 6) Disassemble the cover and baffle 701;

[0058] 7) If Raman characterization is performed, a quartz window and a Raman cover 80 are installed in the groove 102, and the lead of the electrochemical workstation is connected to the tab 203, and the electrochemical parameters are set for charging and discharging, and in-situ Raman characterization is performed under a Raman spectrometer;

[0059] 8) If XRD characterization is performed, an XRD cover 90 is installed in the groove 102, and the lead of the electrochemical workstation is connected to the tab 203, and the electrochemical parameters are set for charging and discharging, and in-situ XRD characterization is performed under a Raman spectrometer.

[0060] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An all-solid-state battery mold, characterized in that: include A spectral cell body, wherein the spectral cell body is provided with a reaction channel running through it, a surface of the spectral cell body is provided with a groove, and a bottom of the groove is provided with a window communicating with the reaction channel; A pressure device is arranged on both sides of the reaction channel, the pressure device includes a push rod device, part of the outer side of the push rod device is sealed and adapted to the reaction channel, and the push rod device can reciprocate in the reaction channel, the push rod device is made of conductive material, and the push rod device is provided with a pole ear for connecting to an electrochemical workstation; A pressurizing device, one end of which is connected to a pressurizing device located at one side of the reaction channel, and the other end of which is connected to a pressurizing device located at the other side of the reaction channel, and the pressurizing device applies pressure to the two pressurizing devices to bring them closer to each other, thereby adjusting the pressure on the electrode material between the two pressurizing devices; A synthetic cover, wherein the synthetic cover is connected to the groove during the process of pressing the electrode material in the reaction channel; as well as A plurality of test windows are connected to the groove according to different characterization states.

2. The all-solid-state battery mold according to claim 1, characterized in that: The push rod device comprises a base, one side of which is provided with a column, the column is adapted to the shape of the reaction channel, and the column is movable and sealed to adapt to the reaction channel, and the pole ear is arranged on the base.

3. The all-solid-state battery mold according to claim 2, characterized in that: The reaction channel is provided with an installation groove on the inner wall near the openings at both ends, and a sealing ring is provided in the installation groove, and the sealing ring is sealed and adapted to the column.

4. The all-solid-state battery mold according to claim 1, characterized in that: The pressure-applying device further comprises a pressure-applying sheet and an insulating sheet, and two ends of the insulating sheet are respectively connected to the pressure-applying sheet and the base in a concave-convex matching manner.

5. The all-solid-state battery mold according to claim 4, characterized in that: The pressure sheet is provided with a first accommodating groove matched with the shape of one side of the insulating sheet, the other side of the insulating sheet is provided with a second accommodating groove, and the base is provided with a convex portion matched with the second accommodating groove.

6. The all-solid-state battery mold according to claim 5, characterized in that: A pressure sensor is arranged in the first accommodating groove.

7. The all-solid-state battery mold according to claim 4, characterized in that: Connecting holes are provided on both sides of the pressure plate, and the pressure device includes a pressure screw, which is threadedly connected with a pressure nut after passing through the connecting hole. By rotating the pressure nut, the pressure devices located on both sides of the spectral pool body are brought closer to each other, thereby adjusting the pressure on the clicking material between the two pressure devices.

8. The all-solid-state battery mold according to claim 1, characterized in that: The synthetic cover comprises a baffle and a pressure cover, the shape of the baffle is adapted to the viewing window, the pressure cover is threadedly connected in the groove, and the pressure cover presses the baffle.

9. The all-solid-state battery mold according to claim 8, characterized in that: The test window includes a Raman cover and an XRD cover, and the Raman cover and the XRD cover are threadedly connected to the groove.

10. The all-solid-state battery mold according to claim 9, characterized in that: The Raman cover and the cover body are provided with a disassembly hole which can be clamped on a wrench.

Images