Solid-state battery in-situ testing device and testing system

Abstract

The application discloses a kind of solid battery in-situ testing device and testing system, solid battery in-situ testing device is configured to be connected to the base and measurement equipment contact end of interval arrangement, base can be rotated around its own axis relative to measurement equipment contact end, including shell, clamping component and connecting component, shell is detachably connected to base, and its inside is formed with accommodating cavity, clamping component includes first clamping body and second clamping body, first clamping body and second clamping body are spaced apart, and are movably built in accommodating cavity, and clearance for clamping solid battery is formed between first clamping body and second clamping body, connecting component includes connecting piece and electric slip ring, connecting piece is connected to shell, and is electrically connected with solid battery, electric slip ring is sleeved on shell, and is electrically connected with connecting piece, and the circumferential side wall of electric slip ring is always in contact with measurement equipment contact end.The application can solve the problem that connecting wire will be twisted and wound in the process of rotation.

Description

Technical Field

[0001] This invention relates to the field of solid-state battery technology, and more specifically to an in-situ testing device and system for solid-state batteries. Background Technology

[0002] To capture the dynamic evolution of batteries under real-world operating conditions, researchers have developed a variety of “in-situ” or “operando” electrochemical test cells. These devices allow X-rays to penetrate the sample while the battery is charging and discharging, thereby obtaining a 4D dataset (3D space + 1D time) that changes over time, revealing the structure-property relationship between structure and performance.

[0003] For example, Chinese invention patent CN111504914B, entitled "An In-situ Testing Device for Solid-State Batteries," includes a main housing, an observation window, a heating device, an insulating cavity, an anode shell, and a cathode shell. The main housing has an internal accommodating cavity. The observation window covers the observation port and is sealed to the main housing. An insulating cavity is located within the accommodating cavity directly below the observation window. The insulating cavity has a horizontal through-hole capable of holding the solid-state battery under test. A heating device is located within the accommodating cavity outside the insulating cavity. The anode shell and cathode shell are respectively inserted into the horizontal through-hole of the insulating cavity. This device observes the structural changes of the solid electrolyte and the interface between the electrode material and the solid electrolyte in the solid-state battery under test through the observation window, enabling spectroscopic structural characterization of the electrode material and the solid electrolyte interface at different ambient temperatures.

[0004] However, traditional in-situ cells are powered by direct wire connections, which twist and entangle during rotation, thus limiting not only the number of rotations and scanning speed but also severely restricting the ability to capture rapid electrochemical processes. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an in-situ testing device and system for solid-state batteries. This invention solves the technical problem that the connecting wires used for power supply in traditional in-situ cells will twist and entangle during rotation, thus limiting the device's ability to capture rapid electrochemical processes.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an in-situ testing device for solid-state batteries, configured to be connected to a base and a contact end of a measuring device, wherein the base and the contact end of the measuring device are spaced apart and the base is rotatable relative to the contact end of the measuring device about its own axis, comprising: The housing is detachably connected to the base and has an internal cavity. The clamping assembly includes a first clamping body and a second clamping body, which are spaced apart from each other and movably housed within the receiving cavity. A gap for clamping a solid-state battery is formed between the first and second clamping bodies. A connection assembly includes a connector and an electric slip ring. The connector is connected to the housing and electrically connected to the solid-state battery. The electric slip ring is fitted onto the housing and electrically connected to the connector. The circumferential sidewall of the electric slip ring is always in contact with the contact end of the measuring device.

[0007] In some embodiments, the housing includes a cylindrical shell and an end cap. The cylindrical shell is hollow inside and open at one end to form the receiving cavity. The first clamping body and the second clamping body are slidably housed in the cylindrical shell. The first clamping body abuts against the bottom inner wall of the cylindrical shell. The solid-state battery is disposed between the first clamping body and the second clamping body, and the anode of the solid-state battery abuts against the first clamping body and the cathode abuts against the second clamping body. The end cap is detachably connected to the open end of the cylindrical shell and abuts against the second clamping body.

[0008] In some embodiments, the inner circumferential wall of the opening end of the cylindrical shell is formed with an internal thread, the circumferential sidewall of the end cap is formed with an external thread, and the end cap is threadedly connected to the opening end of the cylindrical shell.

[0009] In some embodiments, the clamping assembly further includes at least one elastic portion, one end of which is connected to the end cap and the other end abuts against the second clamping body to form a clamping force between the first clamping body and the second clamping body to clamp the solid-state battery.

[0010] In some embodiments, the number of elastic portions is multiple, and the multiple elastic portions are arranged at intervals along the surface of the end cap. The clamping assembly further includes a ball thrust bearing and a force distribution plate. One end of the force distribution plate abuts against the second clamping body, and the other end is connected to the other end of the multiple elastic portions via the ball thrust bearing.

[0011] In some embodiments, the clamping assembly further includes a pressure detection unit connected to the force distribution plate and abutting against the second clamping body.

[0012] In some embodiments, the side wall of the cylindrical shell is provided with a first through groove, the first through groove is arranged in parallel with the receiving cavity, and its two ends are respectively connected to the receiving cavity. The connector includes a first connecting line, one end of the first connecting line is connected to the first clamping body, the other end passes through the first through groove and is connected to the second clamping body, and the two ends of the first connecting line are respectively electrically connected to the first clamping body and the second clamping body.

[0013] In some embodiments, the base has at least one slot, and the other end of the cylindrical shell has a plug-in end. The plug-in end of the cylindrical shell is detachably inserted into the slot. The connecting assembly further includes an insulating ring, which is coaxially sleeved on and connected to the plug-in end of the cylindrical shell. The electric slip ring is coaxially sleeved on and connected to the insulating ring.

[0014] In some embodiments, the cylindrical shell is further provided with a second through groove, one end of which is connected to the receiving cavity and the other end of which passes through the insertion end of the cylindrical shell. The side wall of the insulating ring is provided with a third through groove that passes through the side wall of the second through groove. The third through groove is connected to the other end of the second through groove. The connector further includes a second connecting wire, one end of which is connected to the slip ring and the other end of which passes through the third through groove and the second through groove in sequence and is connected to the first connecting wire. The two ends of the second connecting wire are electrically connected to the first connecting wire and the slip ring, respectively.

[0015] Secondly, the present invention also provides a solid-state battery in-situ testing system, characterized in that it includes a base, a measuring device contact end, and a solid-state battery in-situ testing device as described in any one of the above, wherein the base is spaced apart from the measuring device contact end and is capable of rotating relative to the measuring device contact end about its own axis, and the solid-state battery in-situ testing device is connected to the base and is always in contact with the measuring device contact end.

[0016] Compared with the prior art, the beneficial effects of the solid-state battery in-situ testing device and testing system provided by the present invention include: a receiving cavity for accommodating solid-state batteries is formed inside the housing and is detachably connected to the base; the first clamping body and the second clamping body are both movably built into the receiving cavity and form a gap for clamping solid-state batteries; the connecting member is connected to the housing and electrically connected to the solid-state batteries; the electric slip ring is sleeved on the housing and electrically connected to the connecting member, and the circumferential sidewall of the electric slip ring always abuts against the contact end of the measuring device. Compared to existing technologies, by installing an electric slip ring on the outside of the housing and using an electrical connector to electrically connect the slip ring to the solid-state battery, as the base drives the housing to rotate relative to the contact end of the measuring device around its own axis, the circumferential sidewall of the electric slip ring can always be in contact with the contact end of the measuring device. This ensures that the solid-state battery is always electrically connected to the contact end of the measuring device, preventing the wires from twisting and tangling due to rotation. At the same time, the first and second clamping bodies can stably clamp the solid-state battery and form a squeezing force to maintain stable contact at the solid-solid interface of the solid-state battery. This solves the technical problem that the connecting wires used for power supply in traditional in-situ cells twist and tangle during rotation, thus limiting the device's ability to capture rapid electrochemical processes. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a solid-state battery in-situ testing device connected to a base and a measuring device contact end, according to an embodiment of the present invention. Figure 2 It is along Figure 1 Enlarged diagram of point A in the middle.

[0018] Explanation of reference numerals in the attached figures: Base 100; Measuring device contact end 200; Housing 300; Receiving cavity 310; Cylindrical shell 320; First through groove 321; Insertion end 322; Second through groove 323; End cap 330; Clamping assembly 400; First clamping body 410; Second clamping body 420; Elastic part 430; Ball thrust bearing 440; Force distribution plate 450; Pressure detection unit 460; Connecting assembly 500; Connector 510; First connecting wire 511; Second connecting wire 512; Electric slip ring 520; Third through groove 521; Insulating ring 530; Solid-state battery 600; Cathode 610; Diaphragm 620; Anode 630. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] To address the technical problem that the connecting wires used for power supply in traditional in-situ cells twist and entangle during rotation, thus limiting the device's ability to capture rapid electrochemical processes, this invention provides an in-situ testing device and system for solid-state batteries. By fitting an electric slip ring 520 around the outside of the housing 300 and using an electric connector 510 to electrically connect the slip ring 520 to the solid-state battery 600, and as the base 100 drives the housing 300 to rotate relative to the contact end 200 of the measuring device around its own axis, the circumferential sidewall of the slip ring 520 is always in contact with the contact end 200 of the measuring device. This ensures that the solid-state battery 600 maintains electrical continuity with the contact end 200 of the measuring device, preventing the wires from twisting and entangled due to rotation. Simultaneously, the first clamping body 410 and the second clamping body 420 can stably clamp the solid-state battery 600 and generate compressive force to maintain stable contact at the solid-solid interface of the solid-state battery 600.

[0021] Please see Figure 1 , Figure 1This is a schematic diagram of a solid-state battery in-situ testing device and system according to an embodiment of the present invention. The solid-state battery in-situ testing device is configured to be connected to a base 100 and a measuring device contact end 200. The base 100 and the measuring device contact end 200 are spaced apart and can rotate relative to the measuring device contact end 200 about their own axis. The solid-state battery in-situ testing device includes: a housing 300, a clamping assembly 400, and a connecting assembly 500. The housing 300 is detachably connected to the base 100 and has a receiving cavity 310 formed inside it. The clamping assembly 400 includes a first clamping body 410. The first clamping body 410 and the second clamping body 420 are spaced apart from each other and are both movably built into the receiving cavity 310. The first clamping body 410 and the second clamping body 420 form a gap for clamping the solid-state battery 600. The connecting assembly 500 includes a connector 510 and an electric slip ring 520. The connector 510 is connected to the housing 300 and electrically connected to the solid-state battery 600. The electric slip ring 520 is sleeved on the housing 300 and electrically connected to the connector 510. The circumferential sidewall of the electric slip ring 520 always abuts against the contact end 200 of the measuring device.

[0022] In this device, compared with the prior art, by sleeved an electric slip ring 520 on the outside of the housing 300 and electrically connected to the solid-state battery 600 by the electric connector 510, as the base 100 drives the housing 300 to rotate relative to the contact end 200 of the measuring device around its own axis, it can be ensured that the circumferential sidewall of the electric slip ring 520 always abuts against the contact end 200 of the measuring device, so as to achieve electrical conduction between the solid-state battery 600 and the contact end 200 of the measuring device at all times, and avoid the wires from twisting and tangling due to rotation. At the same time, the first clamping body 410 and the second clamping body 420 can achieve stable clamping of the solid-state battery 600 and form a squeezing force to maintain stable contact of the solid-solid interface of the solid-state battery 600. This can solve the technical problem that the connecting wires used for power supply in traditional in-situ cells will twist and tangle during rotation, thus restricting the device's ability to capture rapid electrochemical processes.

[0023] Furthermore, the base 100 here is the metal sample stage of the X-ray microscope, and the measuring device contact end 200 is a bracket spaced apart from it. The bracket is fixed to the collimator housing of the X-ray source or the anti-collision bar in front of the detector by a strong magnet or screw. The metal sample stage of the X-ray microscope can rotate relative to the bracket around its own rotation axis. This is a conventional setting known to those skilled in the art and will not be described in detail here.

[0024] Furthermore, the slip ring 520 here is a common and readily available high-conductivity metal ring on the market. Brass or phosphor bronze can be used here, and the surface of the slip ring 520 is plated with hard gold, which will not be described in detail here.

[0025] In this embodiment, as Figure 1 As shown, the housing 300 includes a cylindrical shell 320 and an end cap 330. The interior of the cylindrical shell 320 is hollow and one end is open to form a receiving cavity 310. The first clamping body 410 and the second clamping body 420 are slidably installed in the cylindrical shell 320 in sequence. The first clamping body 410 abuts against the bottom inner wall of the cylindrical shell 320. The solid-state battery 600 is disposed between the first clamping body 410 and the second clamping body 420. The anode 630 of the solid-state battery 600 abuts against the first clamping body 410 and the cathode 610 abuts against the second clamping body 420. The end cap 330 is detachably connected to the open end of the cylindrical shell 320 and abuts against the second clamping body 420.

[0026] The end cap 330 is detachably connected to the cylindrical shell 320 to facilitate the installation of the first clamping body 410, the solid-state battery 600 and the second clamping body 420, and to achieve electrical conduction with the anode 630 and cathode 610 of the solid-state battery 600 by the first clamping body 410 and the second clamping body 420 respectively abutting against the solid-state battery 600.

[0027] Furthermore, both the first clamping body 410 and the second clamping body 420 are conductive, both are columnar, and annular grooves are formed on the circumferential sidewalls of the first clamping body 410 and the second clamping body 420. O-rings are provided in the annular grooves to prevent the first clamping body 410 and the second clamping body 420 from sliding or rotating relative to the inner wall of the receiving cavity 310.

[0028] In addition, in some embodiments, a coaxial bushing is provided between the circumferential sidewalls of the first clamping body 410 and the second clamping body 420 and the circumferential inner wall of the receiving cavity 310, in order to prevent the first clamping body 410 and the second clamping body 420 from sliding or rotating relative to the inner wall of the receiving cavity 310, which will not be described in detail here.

[0029] In some embodiments, the bushing is an integral structure used to engage with the O-rings on the surfaces of the first clamping body 410 and the second clamping body 420, respectively, so that the solid-state battery 600 is stably positioned.

[0030] Furthermore, the solid-state battery 600 here includes a cathode 610, a separator 620 and an anode 630 arranged sequentially from top to bottom. The cathode 610 abuts against the second clamping body 420, and the anode 630 abuts against the first clamping body 410 and achieves conductivity, which will not be described in detail here.

[0031] In some embodiments, the shell 320 is made of pure PEEK rods (to avoid background scattering caused by glass fiber fillers) machined. The yield strength of PEEK is about 100 MPa and the modulus is about 3.6 Gpa. In contrast, although Kapton film has better transmittance, it cannot be used as a load-bearing structure. Both PEEK rods and Kapton film are conventional configurations known to those skilled in the art and will not be described in detail here.

[0032] Furthermore, to avoid the wall thickness of the shell 320 affecting the X-ray beam passage, a thinned imaging window region is provided in the shell 320 relative to the solid-state battery 600. The height of the imaging window region is about 5 to 10 mm, and the wall thickness is only 0.5 mm to 0.8 mm. This thickness is the optimal balance point calculated: it can withstand an internal air pressure of more than 5 bar or an axial stacking pressure of 10 MPa without significant bulging deformation, and can maintain an X-ray transmittance of more than 80%.

[0033] In addition, in some embodiments, reinforcing ribs are provided above and below the imaging window. The reinforcing ribs are used to transition the wall thickness to more than 2.0 mm to provide the strength and installation rigidity required for the threaded connection, which will not be described in detail here.

[0034] Furthermore, the bushing has a clearance groove relative to the imaging window.

[0035] In one embodiment, the circumferential inner wall of the open end of the cylindrical shell 320 is formed with an internal thread, the circumferential side wall of the end cap 330 is formed with an external thread, and the end cap 330 is threadedly connected to the open end of the cylindrical shell 320.

[0036] The threaded connection not only enables a detachable connection between the end cap 330 and the open end of the cylindrical shell 320, but also allows pressure to be applied to the first clamping body 410 and the second clamping body 420 by the depth to which the end cap 330 is screwed into the open end of the cylindrical shell 320, thereby improving the stability of the solid-state battery 600 being clamped.

[0037] Furthermore, the end cap 330 and the open end of the cylindrical shell 320 can be detachably connected by elastic snap-fit. For example, a slot is provided on the opposite side wall of the open end of the cylindrical shell 320, and an elastic snap-fit ​​part is provided on the end cap 330 opposite to the slot. The elastic snap-fit ​​part can be snapped into the slot to limit the sliding of the end cap 330 relative to the cylindrical shell 320. This will not be elaborated further here.

[0038] In one embodiment, such as Figure 1As shown, the clamping assembly 400 also includes at least one elastic part 430, one end of which is connected to the end cap 330 and the other end abuts against the second clamping body 420 to form a clamping force between the first clamping body 410 and the second clamping body 420 to clamp the solid-state battery 600.

[0039] By providing an elastic portion 430 between the end cap 330 and the second clamping body 420, the elastic restoring force generated by the elastic portion 430 can act on the solid-state battery 600 through the second clamping body 420, thereby improving the tightness between the second clamping body 420 and the first clamping body 410 and the solid-state battery 600.

[0040] Furthermore, the elastic component 430 here is a spring, elastic sheet, and elastic block that are common and readily available in the market, and will not be described in detail here.

[0041] In one embodiment, such as Figure 1 As shown, there are multiple elastic parts 430, which are arranged at intervals along the surface of the end cap 330. The clamping assembly 400 also includes a ball thrust bearing 440 and a force distribution plate 450. One end of the force distribution plate 450 abuts against the second clamping body 420, and the other end is connected to the other end of the multiple elastic parts 430 via the ball thrust bearing 440.

[0042] By setting the force distribution plate 450, the elastic restoring force generated by the multiple elastic parts 430 is applied evenly to the surface of the second clamping body 420.

[0043] Furthermore, the force plate 450 is connected to the other end of the multiple elastic parts 430 via the ball thrust bearing 440. In order to prevent the torque generated when tightening the cover from being directly transmitted to the battery sample (which may cause shear damage), the end of the pressure cover integrates a pressure plate with an embedded ball bearing. When the cover rotates down, the pressure plate only moves axially and does not rotate with it, which will not be described in detail here.

[0044] In one embodiment, such as Figure 1 As shown, the clamping assembly 400 also includes a pressure detection unit 460, which is connected to the force distribution plate 450 and abuts against the second clamping body 420.

[0045] The pressure detection unit 460 is used for real-time feedback and monitoring of pressure changes, thereby effectively ensuring the smooth conduct of the experiment.

[0046] Furthermore, the pressure detection unit 460 here is a miniature thin-film force sensor that is common and readily available on the market. The miniature thin-film force sensor is connected to the force distribution plate 450 and electrically connected to an external display device. This is a conventional setting known to those skilled in the art and will not be described in detail here.

[0047] In this embodiment, the side wall of the cylindrical shell 320 is provided with a first through groove 321. The first through groove 321 is arranged in parallel with the receiving cavity 310, and its two ends are respectively connected to the receiving cavity 310. The connector 510 includes a first connecting line 511. One end of the first connecting line 511 is connected to the first clamping body 410, and the other end passes through the first through groove 321 and is connected to the second clamping body 420. The two ends of the first connecting line 511 are electrically connected to the first clamping body 410 and the second clamping body 420 respectively.

[0048] The first connecting line 511 runs along the setting direction of the first through groove 321 and is used to realize the electrical connection between the first clamping body 410 and the second clamping body 420.

[0049] Furthermore, the first connecting wire 511 here is a common and readily available wire on the market. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0050] In this embodiment, as Figure 1 , Figure 2 As shown, the base 100 has at least one slot, and the other end of the cylindrical shell 320 has a plug-in end 322. The plug-in end 322 of the cylindrical shell 320 can be detachably inserted into the slot. The connecting assembly 500 also includes an insulating ring 530, which is coaxially sleeved on the plug-in end 322 of the cylindrical shell 320 and connected to the plug-in end 322 of the cylindrical shell 320. The electric slip ring 520 is coaxially sleeved on the insulating ring 530 and connected to the insulating ring 530.

[0051] The cylindrical shell 320 is detachably connected to the slot on the base 100 by means of a plug-in end 322.

[0052] Furthermore, an insulating ring 530 is provided between the slip ring 520 and the shell 320 to prevent electrical conduction between the slip ring 520 and the shell 320. The insulating ring 530 is a common and readily available insulating sleeve on the market. This is a conventional setting known to those skilled in the art and will not be described in detail here.

[0053] In some embodiments, the pin also serves as the ground wire for the solid-state battery 600, where the pin is in direct contact with the metal sample stage of the microscope; in most X-ray microscopes, the sample stage is grounded; therefore, the pin serves as the negative (or positive, depending on the connection) lead of the battery, setting the potential reference point to ground.

[0054] Furthermore, the surface of the plug terminal 322 is also insulated, for example, by hard anodizing 630 (for aluminum) or coating with insulating varnish (for stainless steel), with conductive points remaining only on the bottom end face, or the entire plug terminal 322 is made of high-strength insulating ceramic (such as zirconium oxide) with a conductive core embedded in the center, which will not be elaborated here.

[0055] In one embodiment, such as Figure 1 , Figure 2 As shown, the cylindrical shell 320 is also provided with a second through groove 323. One end of the second through groove 323 is connected to the receiving cavity 310, and the other end passes through the insertion end 322 of the cylindrical shell 320. The side wall of the insulating ring 530 is provided with a third through groove 521 that passes through the side wall of the second through groove 323. The third through groove 521 is connected to the other end of the second through groove 323. The connector 510 also includes a second connecting line 512. One end of the second connecting line 512 is connected to the electric slip ring 520, and the other end passes through the third through groove 521 and the second through groove 323 in sequence and is connected to the first connecting line 511. The two ends of the second connecting line 512 are electrically connected to the first connecting line 511 and the electric slip ring 520, respectively.

[0056] By setting a second through slot 323 through the plug end 322 of the cylindrical shell 320 and a third through slot 521 through the insulating ring 530, the second connecting line 512 is routed, and the electrical connection between the first connecting line 511, the solid battery 600 and the contact end 200 of the external measuring equipment is tested.

[0057] Furthermore, the second connecting wire 512 here is a common and readily available wire on the market. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0058] In some embodiments, the external measuring device contact end 200 employs a gold-plated spring probe with a spherical head, the spherical design reducing scratches on the slip ring surface.

[0059] Furthermore, the spring force is set between 0.3N and 0.8N; too little force will lead to poor contact (high noise), while too much force will increase the rotational friction torque, which may cause overload or vibration of lightweight sample stages (such as piezoelectric displacement stages), which will not be elaborated here.

[0060] This embodiment also provides a solid-state battery in-situ testing system, including a base 100, a measuring device contact end 200, and a solid-state battery in-situ testing device. The base 100 and the measuring device contact end 200 are spaced apart and can rotate relative to the measuring device contact end 200 around its own axis. The solid-state battery in-situ testing device is connected to the base 100 and can always abut against the measuring device contact end 200.

[0061] Furthermore, the diameter of the receiving cavity 310 is 10 mm to 16 mm.

[0062] Furthermore, all components in this embodiment are cleaned and vacuum dried; in an argon-filled glove box (water / oxygen content <0.1 ppm), the operator loads the battery material into the PEEK housing 300; the O-ring is compressed when the pressure cap is tightened to form an airtight seal; since the PEEK housing 300 is non-conductive, even if the battery is short-circuited, no external discharge will occur through the housing 300.

[0063] To better understand this invention, the following is combined with... Figures 1 to 2 The technical solution of the present invention will be described in detail below: The housing 300 has a receiving cavity 310 for accommodating the solid-state battery 600 and is detachably connected to the base 100. The first clamping body 410 and the second clamping body 420 are both movably built into the receiving cavity 310 and form a gap for clamping the solid-state battery 600. The connecting member 510 is connected to the housing 300 and electrically connected to the solid-state battery 600. The electric slip ring 520 is sleeved on the housing 300 and electrically connected to the connecting member 510. The circumferential sidewall of the electric slip ring 520 always abuts against the contact end 200 of the measuring device. Compared to existing technologies, by sleeved an electric slip ring 520 on the outside of the housing 300 and using an electric connector 510 to electrically connect the electric slip ring 520 to the solid-state battery 600, as the base 100 drives the housing 300 to rotate relative to the contact end 200 of the measuring device around its own axis, it can be ensured that the circumferential sidewall of the electric slip ring 520 always abuts against the contact end 200 of the measuring device, so as to achieve electrical conduction between the solid-state battery 600 and the contact end 200 of the measuring device at all times, and avoid the wires from twisting and tangling due to rotation. At the same time, the first clamping body 410 and the second clamping body 420 can achieve stable clamping of the solid-state battery 600 and form a compressive force to maintain stable contact of the solid-solid interface of the solid-state battery 600.

[0064] Furthermore, the structure described above eliminates the limitations of cable entanglement, allowing for spiral scanning or continuous rotation scanning modes similar to medical CT, significantly improving temporal resolution and enabling the capture of faster electrochemical dynamic processes. At the same time, the combination of PEEK material and thin-wall design enables high-contrast images to be obtained even under low-energy X-rays (20-40 keV), clearly distinguishing lithium metal, graphite, membrane 620, and pores, and reducing artifacts commonly found in metal casings 300.

[0065] Furthermore, the plug-in terminal 322 mates with the slot on the base 100, providing plug-and-play compatibility. This allows the device to be directly installed on microscopes of different series without requiring expensive modifications to the microscope hardware.

[0066] This application, through the aforementioned device and system, can solve the technical problem that the connecting wires used for power supply in traditional in-situ cells twist and entangle during rotation, thereby limiting the device's ability to capture rapid electrochemical processes.

[0067] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A solid-state battery in-situ testing device, configured to connect to a base and a contact end of a measuring device, wherein the base and the contact end of the measuring device are spaced apart, and the base is rotatable relative to the contact end of the measuring device about its own axis, characterized in that, include: The housing is detachably connected to the base and has an internal cavity. The clamping assembly includes a first clamping body and a second clamping body, which are spaced apart from each other and movably housed within the receiving cavity. A gap for clamping a solid-state battery is formed between the first and second clamping bodies. A connection assembly includes a connector and an electric slip ring. The connector is connected to the housing and electrically connected to the solid-state battery. The electric slip ring is fitted onto the housing and electrically connected to the connector. The circumferential sidewall of the electric slip ring is always in contact with the contact end of the measuring device.

2. The solid-state battery in-situ testing device according to claim 1, characterized in that, The housing includes a cylindrical shell and an end cap. The cylindrical shell is hollow inside and open at one end to form the receiving cavity. The first clamping body and the second clamping body are slidably installed inside the cylindrical shell in sequence. The first clamping body abuts against the bottom inner wall of the cylindrical shell. The solid-state battery is disposed between the first clamping body and the second clamping body, and the anode of the solid-state battery abuts against the first clamping body and the cathode abuts against the second clamping body. The end cap is detachably connected to the open end of the cylindrical shell and abuts against the second clamping body.

3. The solid-state battery in-situ testing device according to claim 2, characterized in that, The inner circumferential wall of the open end of the cylindrical shell is formed with an internal thread, and the circumferential side wall of the end cap is formed with an external thread, and the end cap is threadedly connected to the open end of the cylindrical shell.

4. The solid-state battery in-situ testing device according to claim 2, characterized in that, The clamping assembly further includes at least one elastic part, one end of which is connected to the end cap and the other end abuts against the second clamping body to form a clamping force between the first clamping body and the second clamping body to clamp the solid-state battery.

5. The solid-state battery in-situ testing device according to claim 4, characterized in that, The number of elastic parts is multiple, and the multiple elastic parts are arranged at intervals along the surface of the end cap. The clamping assembly also includes a ball thrust bearing and a force distribution plate. One end of the force distribution plate abuts against the second clamping body, and the other end is connected to the other end of the multiple elastic parts via the ball thrust bearing.

6. The solid-state battery in-situ testing device according to claim 5, characterized in that, The clamping assembly further includes a pressure detection unit, which is connected to the force distribution plate and abuts against the second clamping body.

7. The solid-state battery in-situ testing device according to claim 2, characterized in that, The side wall of the cylindrical shell is provided with a first through groove, which is arranged in parallel with the receiving cavity, and its two ends are respectively connected to the receiving cavity. The connector includes a first connecting line, one end of which is connected to the first clamping body, and the other end passes through the first through groove and is connected to the second clamping body. The two ends of the first connecting line are respectively electrically connected to the first clamping body and the second clamping body.

8. The solid-state battery in-situ testing device according to claim 7, characterized in that, The base has at least one slot, and the other end of the cylindrical shell has a plug-in end. The plug-in end of the cylindrical shell is detachably inserted into the slot. The connecting assembly also includes an insulating ring. The insulating ring is coaxially sleeved on the plug-in end of the cylindrical shell and connected to the plug-in end of the cylindrical shell. The electric slip ring is coaxially sleeved on the insulating ring and connected to the insulating ring.

9. The solid-state battery in-situ testing device according to claim 8, characterized in that, The cylindrical shell is also provided with a second through groove, one end of which is connected to the receiving cavity and the other end of which passes through the insertion end of the cylindrical shell. The side wall of the insulating ring is provided with a third through groove that passes through the side wall of the second through groove. The third through groove is connected to the other end of the second through groove. The connector also includes a second connecting wire, one end of which is connected to the electric slip ring and the other end of which passes through the third through groove and the second through groove in sequence and is connected to the first connecting wire. The two ends of the second connecting wire are electrically connected to the first connecting wire and the electric slip ring, respectively.

10. A solid-state battery in-situ testing system, characterized in that, The device includes a base, a measuring device contact end, and a solid-state battery in-situ testing device as described in any one of claims 1-9. The base is spaced apart from the measuring device contact end and is rotatable relative to the measuring device contact end about its own axis. The solid-state battery in-situ testing device is connected to the base and is always in contact with the measuring device contact end.

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