All-solid-state three-electrode battery testing device

Abstract

This utility model relates to the field of all-solid-state battery testing technology and discloses an all-solid-state three-electrode battery testing device, including an insulating base and a molding assembly. The insulating base has a receiving cavity for accommodating the all-solid-state three-electrode battery, the inner diameter of which is the same as the outer diameter of the all-solid-state three-electrode battery. A first through hole is provided on the upper side of the insulating base, connecting the outside to the receiving cavity. A second through hole and a third through hole are provided on the lower side of the insulating base, connecting the outside to the receiving cavity. The second and third through holes are spaced apart horizontally. The molding assembly is configured to be inserted into the first, second, and third through holes and apply pressure close to the electrolyte to the first electrode, second electrode, and reference electrode of the all-solid-state three-electrode battery in a vertical direction. This ensures that the first electrode, second electrode, and reference electrode are subjected to balanced pressure, preventing the reference electrode from breaking due to pressure applied by the molding assembly, thereby enabling in-situ monitoring and analysis of the performance of the first electrode, second electrode, and the entire battery.

Description

Technical Field

[0001] This utility model relates to the field of all-solid-state battery testing technology, and specifically to an all-solid-state three-electrode battery testing device. Background Technology

[0002] All-solid-state batteries are batteries where both the electrolyte and electrodes are solid. Existing two-electrode testing systems for all-solid-state batteries can only obtain the overall voltage response of the positive and negative electrodes, failing to accurately attribute phenomena such as electrochemical polarization, lithium plating, and side reactions to a single electrode. This leads to difficulties in pinpointing battery failure mechanisms and obscures the direction for performance improvement. Therefore, a reference electrode is introduced at the analysis end of a two-electrode battery to form an all-solid-state three-electrode battery. An all-solid-state three-electrode battery includes an electrolyte, a first electrode positioned above the electrolyte, a second electrode positioned below the electrolyte and spaced horizontally, and a reference electrode. The first or second electrode under test serves as the working electrode, maintaining its electrochemical environment consistent with that of an actual battery. The second or first electrode, with the opposite polarity to the working electrode, serves as the counter electrode to form a closed current loop. The reference electrode is positioned between the working electrode and the counter electrode to provide a stable potential reference for in-situ monitoring and analysis of the performance of the first electrode, the second electrode, and the entire battery.

[0003] In current all-solid-state three-electrode batteries, the reference electrode is set by opening a hole in the side wall of the housing cavity of the all-solid-state three-electrode battery and introducing a filament-like reference electrode. When performing in-situ monitoring and analysis of the performance of the electrodes of the all-solid-state three-electrode battery, since the existing electrolyte and electrodes are in a solid state, it is necessary to apply pressure to the all-solid-state three-electrode battery through a mold to ensure close contact between the first electrode, the second electrode and the electrolyte.

[0004] However, during the process of applying pressure to the all-solid-state three-electrode battery, the local stress can easily cause the reference electrode set on the side wall of the all-solid-state three-electrode battery to break, making it impossible to achieve in-situ monitoring and analysis of the performance of the first electrode, the second electrode and the entire battery. Utility Model Content

[0005] The purpose of this invention is to overcome the problem that in the prior art, the reference electrode set on the side wall of the all-solid-state three-electrode battery is easily broken due to local stress during the process of applying pressure to the all-solid-state three-electrode battery by the mold, which makes it impossible to realize the in-situ monitoring and analysis of the performance of the first electrode, the second electrode and the entire battery of the all-solid-state three-electrode battery. This invention provides an all-solid-state three-electrode battery testing device.

[0006] To achieve the above objectives, this utility model provides a testing device for an all-solid-state three-electrode battery, comprising: an insulating base having a receiving cavity for accommodating the all-solid-state three-electrode battery, the inner diameter of the receiving cavity being the same as the outer diameter of the all-solid-state three-electrode battery; a first through hole communicating with the outside and the receiving cavity being provided on the upper side of the insulating base; and a second through hole and a third through hole communicating with the outside and the receiving cavity being provided on the lower side of the insulating base, the second through hole and the third through hole being spaced apart from each other in a horizontal direction; and a molding assembly configured to be able to be inserted into the first through hole, the second through hole and the third through hole and apply pressure close to the electrolyte to the first electrode, the second electrode and the reference electrode of the all-solid-state three-electrode battery in a vertical direction.

[0007] In some embodiments, the molding assembly includes: a first pressure head for insertion into the first through hole and contacting the first electrode; a second pressure head for insertion into the second through hole and contacting the second electrode; a third pressure head for insertion into the third through hole and contacting the reference electrode; and a driving mechanism for driving the first pressure head, the second pressure head, and the third pressure head to move vertically.

[0008] In some embodiments, the molding assembly further includes: a first connecting seat, on which the first pressure head is mounted; and a second connecting seat, on which the second pressure head and the third pressure head are mounted; the first connecting seat and the second connecting seat are arranged parallel to each other on both sides of the insulating seat in a vertical direction; and the driving mechanism is used to drive the first connecting seat and the second connecting seat to move closer to or further away from each other in a vertical direction.

[0009] In some embodiments, the molding assembly further includes an insulating element, through which at least one of the second and third pressure heads is connected to the second connector.

[0010] In some embodiments, the molding assembly further includes a support seat disposed on the second connector, the support seat being used to support the insulating seat.

[0011] In some embodiments, the drive mechanism includes: a plurality of bolts configured to be fixedly connected to one of the first connecting seat and the second connecting seat and pass through the other of the first connecting seat and the second connecting seat; and a plurality of nuts, the plurality of nuts being threadedly connected to the plurality of bolts in a one-to-one correspondence, the nuts being rotatable about the axis of the bolts to drive the first connecting seat and the second connecting seat to move closer to or further away from each other.

[0012] In some embodiments, the plurality of bolts are configured to be evenly spaced along the circumference of the first or second connector.

[0013] In some embodiments, an insulating sleeve is provided at the connection point between the bolt and at least one of the first and second connecting seats.

[0014] In some embodiments, the all-solid-state three-electrode battery testing apparatus further includes a testing unit for testing the performance of the all-solid-state three-electrode battery.

[0015] In some embodiments, the molding assembly is made of a conductive material, and the first electrode terminal connected to the first pressure head, the second electrode terminal connected to the second pressure head, and the reference electrode terminal connected to the third pressure head are all connected to the test unit.

[0016] The above technical solution places the all-solid-state three-electrode battery within the cavity of an insulating base. Then, a molding assembly is inserted into the first, second, and third through holes of the insulating base. Pressure close to the electrolyte is applied vertically to the first electrode positioned above the electrolyte, the second electrode positioned below the electrolyte and spaced horizontally from each other, and the reference electrode. This ensures balanced pressure on the first, second, and reference electrodes, preventing reference electrode breakage caused by pressure applied by the molding assembly, thus maintaining the structural integrity of the all-solid-state three-electrode battery. This allows for in-situ monitoring and analysis of the performance of the first electrode, second electrode, and the entire battery. The monitoring and analysis results reveal the operating status of the first and second electrodes. Furthermore, it ensures that the solid-state first, second, and reference electrodes are in close contact with the solid-state electrolyte, preventing large electrode polarization caused by poor electrolyte-electrode contact, reducing measurement errors in battery evaluation, and ensuring the accuracy of in-situ monitoring and analysis of the all-solid-state three-electrode battery performance. The inner diameter of the cavity of the insulating base is set to be the same as the outer diameter of the all-solid-state three-electrode battery to ensure that the all-solid-state three-electrode battery will not deform radially when subjected to pressure from the molding assembly, thus ensuring the integrity of the all-solid-state three-electrode battery. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the all-solid-state three-electrode battery testing device disclosed in this utility model; Figure 2 This is a schematic diagram of the insulating base of the all-solid-state three-electrode battery testing device disclosed in this utility model; Figure 3 This is a bottom view of the insulating base of the first embodiment of the all-solid-state three-electrode battery testing device disclosed in this utility model; and Figure 4This is a bottom view of the second embodiment of the insulating base of the all-solid-state three-electrode battery testing device disclosed in this utility model.

[0018] Explanation of reference numerals in the attached figures Detailed Implementation

[0019] The all-solid-state three-electrode battery testing device will be described in detail with reference to the accompanying drawings and specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention, and the protection scope of the present invention is not limited to the specific embodiments described below.

[0020] It should be noted beforehand that the directional terms used in the descriptions of the various embodiments below, such as "upper side" and "lower side", are distinguished according to the technical meaning of the vertical direction of the all-solid-state three-electrode battery testing device.

[0021] This invention provides a testing device for an all-solid-state three-electrode battery. (See also...) Figures 1 to 4 The all-solid-state three-electrode battery testing device includes an insulating base 2 and a molding assembly 3. The insulating base 2 has a receiving cavity 21 for accommodating the all-solid-state three-electrode battery 1. The inner diameter of the receiving cavity 21 is the same as the outer diameter of the all-solid-state three-electrode battery 1. The upper side of the insulating base 2 is provided with a first through hole 22 communicating with the outside and the receiving cavity 21. The lower side of the insulating base 2 is provided with a second through hole 23 and a third through hole 24 communicating with the outside and the receiving cavity 21. The second through hole 23 and the third through hole 24 are spaced apart from each other in the horizontal direction. The molding assembly 3 is configured to be able to be inserted into the first through hole 22, the second through hole 23 and the third through hole 24 and apply pressure close to the electrolyte 11 to the first electrode 12, the second electrode 13 and the reference electrode 14 of the all-solid-state three-electrode battery 1 in the vertical direction.

[0022] The all-solid-state three-electrode battery 1 is placed in the receiving cavity 21 of the insulating base 2. Then, the molding assembly 3 is inserted into the first through hole 22, the second through hole 23, and the third through hole 24 of the insulating base 2. Pressure close to the electrolyte 11 is applied vertically to the first electrode 12 located on the upper side of the electrolyte 11, the second electrode 13 located on the lower side of the electrolyte 11 and spaced apart horizontally, and the reference electrode 14. This ensures that the first electrode 12, the second electrode 13, and the reference electrode 14 are subjected to balanced pressure, preventing the reference electrode 14 from breaking when the molding assembly 3 applies pressure to the all-solid-state three-electrode battery 1, thus ensuring the all-solid-state three-electrode battery 1 is protected. The integrity of the electrode battery 1 structure is ensured to enable in-situ monitoring and analysis of the performance of the first electrode 12, the second electrode 13, and the entire battery. Through monitoring and analysis, the operating status of the first electrode 12 and the second electrode 13 can be obtained, thus achieving modification of the all-solid-state three-electrode battery 1. Furthermore, it ensures that the solid-state first electrode 12, the second electrode 13, and the reference electrode 14 can all maintain close contact with the solid-state electrolyte 11, thereby avoiding the problem of large electrode polarization caused by poor contact between the electrolyte 11 and the electrodes, reducing measurement errors in battery evaluation, and ensuring the accuracy of in-situ monitoring and analysis of the all-solid-state three-electrode battery 1's performance. The inner diameter of the receiving cavity 21 of the insulating base 2 is set to be the same as the outer diameter of the all-solid-state three-electrode battery 1 to ensure that the all-solid-state three-electrode battery 1 will not deform radially when subjected to pressure from the molding assembly 3, thus ensuring the integrity of the all-solid-state three-electrode battery 1.

[0023] Among them, the performance of in-situ monitoring and analysis includes, but is not limited to, potential, impedance, charge-discharge curves and capacity loss.

[0024] Preferably, the first electrode 12 is the positive electrode and the second electrode 13 is the negative electrode. Alternatively, the first electrode 12 can be the negative electrode and the second electrode 13 can be the positive electrode. Here, the first electrode 12 and the second electrode 13 are not specifically limited.

[0025] In the above, for example Figure 1As shown, the molding assembly 3 includes a first pressure head 31, a second pressure head 32, a third pressure head 33, and a driving mechanism 4. The first pressure head 31 is inserted into the first through hole 22 and contacts the first electrode 12. The second pressure head 32 is inserted into the second through hole 23 and contacts the second electrode 13. The third pressure head 33 is inserted into the third through hole 24 and contacts the reference electrode 14. The driving mechanism 4 drives the first pressure head 31, the second pressure head 32, and the third pressure head 33 to move vertically. Under the drive of the driving mechanism 4, the first pressure head 31, the second pressure head 32, and the third pressure head 33 are respectively inserted into the first through hole 22, the second through hole 23, and the third through hole 24 to apply pressure close to the electrolyte 11 to the first electrode 12, the second electrode 13, and the reference electrode 14, respectively. This ensures that the contact surfaces of the first electrode 12, the second electrode 13, and the reference electrode 14 are tightly fitted with the electrolyte 11, thereby improving the accuracy of in-situ monitoring and analysis of the performance of the all-solid-state three-electrode battery 1.

[0026] See Figures 1 to 3 In one embodiment, the first through hole 22 is cylindrical and cooperates with the first pressure head 31, the second through hole 23 is cylindrical and cooperates with the second pressure head 32, and the third through hole 24 is cylindrical and cooperates with the third pressure head 33.

[0027] See Figure 1 , Figure 2 and Figure 4 In another embodiment, the first through hole 22 is cylindrical and mates with the first pressure head 31, the second through hole 23 is cylindrical and mates with the second pressure head 32, and the third through hole 24 is cuboid and mates with the third pressure head 33. It should be noted that the first through hole 22, the second through hole 23, and the third through hole 24 are adapted to the shapes of the first pressure head 31, the second pressure head 32, and the third pressure head 33, respectively, but their shapes are not specifically limited.

[0028] Understandably, this all-solid-state three-electrode battery testing device can not only perform in-situ monitoring and analysis of the performance of the already prepared all-solid-state three-electrode battery 1, but also prepare the all-solid-state three-electrode battery 1. The second electrode 13 and the reference electrode 14 are pressed together using the molding assembly 3. Then, the electrolyte 11 is placed on top of the second electrode 13 and the reference electrode 14, and the electrolyte 11 is prepared onto the second electrode 13 and the reference electrode 14 using the molding assembly 3. Finally, the first electrode 12 is placed on top of the electrolyte 11, and the first electrode 12 is prepared onto the electrolyte 11 using the molding assembly 3, thus completing the preparation of the all-solid-state three-electrode battery 1. During the preparation process, the reference electrode 14 is prevented from breaking when the molding assembly 3 applies pressure to the all-solid-state three-electrode battery 1, thereby improving the success rate of the preparation and the accuracy of the test of the all-solid-state three-electrode battery 1.

[0029] Specifically, the second pressure head 32 and the third pressure head 33 in the molding assembly 3 are inserted into the second through hole 23 and the third through hole 24, respectively. Then, the material of the second electrode 13 and / or the material of the reference electrode 14 are laid on the plane of the second pressure head 32 and / or the third pressure head 33. The first pressure head 31 is inserted into the first through hole 22 and downward pressure is applied to the material of the second electrode 13 and / or the material of the reference electrode 14 to prepare the second electrode 13 and / or the reference electrode 14. The first pressure head 31 is removed from the first through hole 22, and the electrolyte 11 material is laid. On the plane formed by the second electrode 13, the reference electrode 14, and the insulating base 2, a first pressure head 31 is inserted into the first through hole 22 to prepare the electrolyte 11 and place the electrolyte 11 on the upper side of the second electrode 13 and the reference electrode 14. The first pressure head 31 is then removed from the first through hole 22, and the material of the first electrode 12 is laid on top of the electrolyte 11. The first pressure head 31 is then inserted into the first through hole 22 and pressure is applied downwards to the material of the first electrode 12 to place the first electrode 12 onto the electrolyte 11, thereby completing the preparation of the all-solid-state three-electrode battery 1. After the all-solid-state three-electrode battery 1 is prepared, its performance is monitored and analyzed in situ using the all-solid-state three-electrode battery testing device.

[0030] In the above, for example Figure 1 As shown, the molding assembly 3 also includes a first connecting seat 34 and a second connecting seat 35. The first pressing head 31 is installed on the first connecting seat 34, and the second pressing head 32 and the third pressing head 33 are installed on the second connecting seat 35. The first connecting seat 34 and the second connecting seat 35 are arranged parallel to each other on both sides of the insulating seat 2 in the vertical direction. The driving mechanism 4 is used to drive the first connecting seat 34 and the second connecting seat 35 to move closer to or further away from each other in the vertical direction. The first connecting seat 34 is equipped with the first pressure head 31, and the second connecting seat 35 is equipped with the second pressure head 32 and the third pressure head 33. The driving mechanism 4 drives the first connecting seat 34 and the second connecting seat 35 to move closer or further apart in the vertical direction, thereby realizing the synchronous movement of the second pressure head 32 and the third pressure head 33, as well as the movement of the first pressure head 31 closer or further apart from the second pressure head 32 and the third pressure head 33. The first connecting seat 34 and the second connecting seat 35 are arranged parallel to each other on both sides of the insulating seat 2, so that the first pressure head 31 can move relatively parallel to the second pressure head 32 and the third pressure head 33, thereby ensuring that the all-solid-state three-electrode battery 1 is subjected to uniform pressure and avoiding the all-solid-state three-electrode battery 1 from cracking due to uneven force.

[0031] The first connecting seat 34 has a cross-sectional area in the horizontal direction that is larger than that of the first pressing head 31, and the second connecting seat 35 has a cross-sectional area in the horizontal direction that is larger than that of the second pressing head 32 and the third pressing head 33, so as to ensure that the first pressing head 31 can move stably with the first connecting seat 34, and the second pressing head 32 and the third pressing head 33 can move stably with the second connecting seat 35.

[0032] The molding assembly 3 also includes an insulating component 36. At least one of the second pressure head 32 and the third pressure head 33 is connected to the second connecting seat 35 through the insulating component 36. During the performance testing of the all-solid-state three-electrode battery 1, since both the second pressure head 32 and the third pressure head 33 are made of conductive materials, a short circuit may occur between them after the circuit is connected. Therefore, at least one of the second pressure head 32 and the third pressure head 33 is connected to the second connecting seat 35 through the insulating component 36 to cut off the current path between the second pressure head 32 and the third pressure head 33 and ensure the normal connection of the current path during the testing process.

[0033] Preferably, see Figure 1 An insulating component 36 is disposed at the connection between the third pressure head 33 and the second connecting seat 35. The insulating component 36 can prevent short circuits between the second pressure head 32 and the third pressure head 33, ensuring the normal and stable operation of the all-solid-state three-electrode battery 1. Optionally, the insulating component 36 is disposed at the connection between the second pressure head 32 and the second connecting seat 35.

[0034] Alternatively, the insulating component 36 can be an insulating support base. The second connecting base 35 is provided with a groove, and the insulating support base is fixedly installed in the groove of the second connecting base 35. A groove is also provided above the insulating support base. The third pressure head 33 can be fixedly inserted into the groove of the insulating support base to achieve a stable connection between the second connecting base 35, the insulating support base and the third pressure head 33.

[0035] It should be understood that the insulating element 36 can be made of any insulating material. Preferably, the insulating element 36 is made of an insulating material with a certain strength to provide stable support for the third pressure head 33.

[0036] See above. Figure 1 The molding assembly 3 also includes a support base 37 disposed on the second connecting seat 35, the support base 37 being used to support the insulating seat 2. The support base 37 is provided to effectively support the insulating seat 2.

[0037] The upper surface of the support base 37 is flush with the upper surface of the insulating component 36 to ensure that the insulating base 2 is in a horizontal state, thereby ensuring that the all-solid-state three-electrode battery 1 is subjected to uniform force.

[0038] Furthermore, the outer diameter of the support 37 is smaller than the outer diameter of the insulating base 2, so that there is a gap between the insulating base 2 and the support 37, so as to facilitate the separation of the insulating base 2 and the support 37.

[0039] It should be noted that the drive mechanism 4 can be a structure capable of driving the first connecting seat 34 and the second connecting seat 35 to move up and down in the vertical direction. For example, the drive mechanism 4 can be a cylinder, hydraulic cylinder, or other similar structure.

[0040] See above. Figure 1 The driving mechanism 4 of this utility model includes multiple bolts 41 and multiple nuts 42. The multiple bolts 41 are fixedly connected to one of the first connecting seat 34 and the second connecting seat 35 and pass through the other of the first connecting seat 34 and the second connecting seat 35. The multiple nuts 42 are threadedly connected to the multiple bolts 41 in a one-to-one correspondence. The nuts 42 can rotate around the axis of the bolt 41 to drive the first connecting seat 34 and the second connecting seat 35 to move closer or further apart. The bolts 41 fixedly provided in the first connecting seat 34 or the second connecting seat 35 can pass through the second connecting seat 35 or the first connecting seat 34 and are threadedly connected to the nuts 42. By rotating the nuts 42, the nuts 42 rotate around the axis of the bolts 41 to drive the first connecting seat 34 and the second connecting seat 35 to move closer or further apart.

[0041] The bolt 41 includes a head and a shank. The head of the bolt 41 is fixedly connected to the first connecting seat 34, and the shank of the bolt 41 passes through the second connecting seat 35 and is threadedly connected to the nut 42.

[0042] Based on the above embodiment, the plurality of bolts 41 are arranged to be evenly spaced along the circumference of the first connecting seat 34 or the second connecting seat 35. During the adjustment of the bolts 41, the nut 42 ensures that the first connecting seat 34 and the second connecting seat 35 are subjected to uniform force.

[0043] The drive mechanism 4 also includes a control component, which controls multiple nuts 42 to rotate simultaneously and at the same angle, so that the first connecting seat 34 and the second connecting seat 35 remain parallel during vertical movement, ensuring uniform force on the all-solid-state three-electrode battery 1.

[0044] See above. Figure 1 An insulating sleeve 43 is provided at the connection point between the bolt 41 and at least one of the first connecting seat 34 and the second connecting seat 35. The insulating sleeve 43 can prevent a short circuit from forming between the first connecting seat 34 and the second connecting seat 35 through the connection of the bolt 41, thus ensuring the stable operation of the all-solid-state three-electrode battery testing device.

[0045] Preferably, see Figure 1 An insulating sleeve 43 is provided at the connection between the bolt 41 and the first connecting seat 34.

[0046] The all-solid-state three-electrode battery 1 is placed within the receiving cavity 21 of the insulating base 2, and vertical pressure is applied to the all-solid-state three-electrode battery 1 by the molding assembly 3 to ensure that the solid first electrode 12, second electrode 13, and reference electrode 14 can all be in close contact with the solid electrolyte 11. The all-solid-state three-electrode battery testing device also includes a testing unit for testing the performance of the all-solid-state three-electrode battery 1. The testing unit performs in-situ monitoring and analysis of the performance of the all-solid-state three-electrode battery 1 to obtain relevant parameters of the first electrode 12, second electrode 13, and the performance of the all-solid-state three-electrode battery 1.

[0047] The molding assembly 3 is made of conductive material. The first electrode terminal 5 connected to the first pressure head 31, the second electrode terminal 6 connected to the second pressure head 32, and the reference electrode terminal 7 connected to the third pressure head 33 are all connected to the test unit. The molding assembly 3 is conductive. Connecting the test unit to the first electrode terminal 5, the second electrode terminal 6, and the reference electrode terminal 7 allows for the connection of the test unit to the first electrode 12, the second electrode 13, and the reference electrode 14, making the connection more convenient and faster without damaging the first electrode 12, the second electrode 13, and the reference electrode 14.

[0048] The aforementioned testing unit of this invention includes an electrochemical workstation and multiple wires. The electrochemical workstation is connected to the first electrode terminal 5, the second electrode terminal 6, and the reference electrode terminal 7 via the multiple wires. The electrochemical workstation forms a current loop with these terminals, enabling in-situ monitoring and analysis of the performance of the all-solid-state three-electrode battery 1.

[0049] See above. Figure 1 The first electrode terminal 5 is located on the side wall of the first connector 34, the second electrode terminal 6 is located on the side wall of the second connector 35, and the reference electrode terminal 7 is located on the third pressure head 33. One end of the three wires is connected to the first electrode terminal 5, the second electrode terminal 6 and the reference electrode terminal 7 respectively, and the other end of the three wires is connected to the electrochemical workstation.

[0050] The testing process of the all-solid-state three-electrode battery testing device of this invention is as follows: The insulating base 2 is placed on the support base 37 of the second connecting base 35, and the second pressure head 32 and the third pressure head 33 are respectively inserted into the second through hole 23 and the third through hole 24 of the insulating base 2. The all-solid-state three-electrode battery 1 is placed in the receiving cavity 21 of the insulating base 2, so that the second pressure head 32 and the third pressure head 33 are in contact with the second electrode 13 and the reference electrode 14 respectively. The first pressure head 31 is inserted into the first through hole 22 of the insulating base 2 and is in contact with the first electrode 12. The nut 42 is threadedly connected to the bolt 41 and the nut 42 is rotated so that the first connecting base 34 and the second connecting base 35 are brought closer to each other in the vertical direction. The first pressure head 31, the second pressure head 32 and the third pressure head 33 apply pressure close to the electrolyte 11 to the first electrode 12, the second electrode 13 and the reference electrode 14 respectively, so that the solid first electrode 12, the second electrode 13 and the reference electrode 14 of the all-solid-state three-electrode battery 1 can be tightly attached to the solid electrolyte 11. One end of each of the three wires is connected to the first electrode terminal 5 of the first connector 34, the second electrode terminal 6 of the second connector 35, and the reference electrode terminal 7 of the third pressure head 33, respectively. The other end of the three wires is connected to the electrochemical workstation, which provides power to enable in-situ monitoring and analysis of the performance of the all-solid-state three-electrode battery 1.

[0051] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention. This includes combining various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A solid-state three-electrode battery testing device, characterized by, include: An insulating base (2) has a receiving cavity (21) for accommodating the all-solid-state three-electrode battery (1). The inner diameter of the receiving cavity (21) is the same as the outer diameter of the all-solid-state three-electrode battery (1). A first through hole (22) communicating with the outside and the receiving cavity (21) is provided on the upper side of the insulating base (2). A second through hole (23) and a third through hole (24) communicating with the outside and the receiving cavity (21) are provided on the lower side of the insulating base (2). The second through hole (23) and the third through hole (24) are spaced apart from each other in the horizontal direction. A molding assembly (3) is configured to be inserted into the first through hole (22), the second through hole (23) and the third through hole (24) and apply pressure close to the electrolyte (11) to the first electrode (12), the second electrode (13) and the reference electrode (14) of the all-solid-state three-electrode battery (1) in the vertical direction.

2. The all-solid-state three-electrode battery test device according to claim 1, characterized by, The molding assembly (3) includes: The first pressure head (31) is used to be inserted into the first through hole (22) and to contact the first electrode (12); The second pressure head (32) is used to insert into the second through hole (23) and contact the second electrode (13); A third pressure head (33) is used to insert into the third through hole (24) and contact the reference electrode (14); and The driving mechanism (4) is used to drive the first pressure head (31), the second pressure head (32) and the third pressure head (33) to move in the vertical direction.

3. The all-solid-state three-electrode battery test device of claim 2, wherein, The molding assembly (3) further includes: The first connecting seat (34) and the first pressure head (31) are mounted on the first connecting seat (34); and The second connecting seat (35), the second pressure head (32) and the third pressure head (33) are mounted on the second connecting seat (35), and the first connecting seat (34) and the second connecting seat (35) are arranged parallel to each other on both sides of the insulating seat (2) in the vertical direction. The driving mechanism (4) is used to drive the first connecting seat (34) and the second connecting seat (35) to move closer or further apart in the vertical direction.

4. The all-solid-state three-electrode battery test device according to claim 3, wherein The molding assembly (3) further includes an insulating element (36), at least one of the second pressure head (32) and the third pressure head (33) is connected to the second connecting seat (35) through the insulating element (36).

5. The all-solid-state three-electrode battery test device of claim 3, wherein, The molding assembly (3) further includes a support (37) disposed on the second connecting seat (35), the support (37) being used to support the insulating seat (2).

6. The all-solid-state three-electrode battery testing device according to claim 3, characterized in that, The drive mechanism (4) includes: Multiple bolts (41) are configured to be fixedly connected to one of the first connecting seat (34) and the second connecting seat (35) and pass through the other of the first connecting seat (34) and the second connecting seat (35); and Multiple nuts (42) are threadedly connected to multiple bolts (41) in a one-to-one correspondence. The nuts (42) are rotatable about the axis of the bolts (41) to drive the first connecting seat (34) and the second connecting seat (35) to move closer or further apart from each other.

7. The all-solid-state three-electrode battery testing apparatus according to claim 6, characterized in that, The plurality of bolts (41) are arranged to be evenly spaced along the circumference of the first connecting seat (34) or the second connecting seat (35).

8. The all-solid-state three-electrode battery testing apparatus according to claim 6, characterized in that, An insulating sleeve (43) is provided at the connection point between the bolt (41) and at least one of the first connecting seat (34) and the second connecting seat (35).

9. The all-solid-state three-electrode battery testing apparatus according to any one of claims 2-8, characterized in that, The all-solid-state three-electrode battery testing device also includes a testing unit, which is used to test the performance of the all-solid-state three-electrode battery (1).

10. The all-solid-state three-electrode battery testing device according to claim 9, characterized in that, The molding assembly (3) is made of conductive material. The first electrode terminal (5) connected to the first pressure head (31), the second electrode terminal (6) connected to the second pressure head (32), and the reference electrode terminal (7) connected to the third pressure head (33) are all connected to the test unit.

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