Internal observation device for lithium-ion battery thermal runaway process

Abstract

This utility model relates to an internal observation device for the thermal runaway process of a lithium-ion battery, comprising an X-ray system, a battery thermal runaway triggering device, a high-speed imaging system, and an observation and control system. The X-ray system emits X-rays onto the lithium-ion battery, the battery thermal runaway triggering device triggers thermal runaway in the lithium-ion battery, the high-speed imaging system images the lithium-ion battery, and the observation and control system is communicatively connected to the battery thermal runaway triggering device and the high-speed imaging system. This utility model addresses the technical problem that existing observation methods cannot effectively observe the internal structural changes of lithium-ion batteries during thermal runaway.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium-ion battery testing equipment, and in particular to an internal observation device for the thermal runaway process of a lithium-ion battery. Background Technology

[0002] When a battery experiences thermal runaway, it generates a large amount of high-temperature gas and particulate matter, which can easily damage equipment. Therefore, it is necessary to limit the diffusion of the ejected material, and thus, thermal runaway monitoring tests are required for lithium-ion batteries. Currently, the observation of thermal runaway in lithium-ion batteries mainly relies on high-speed cameras and infrared cameras. This monitoring method can only observe superficial phenomena, such as the ejection state, ejection time, and ejection temperature. For example, the lithium-ion battery thermal runaway jet experimental device disclosed in Chinese Patent Publication No. CN110007241A uses a CCD camera to observe the external condition of the battery cell but fails to observe the internal condition. For internal battery defects, existing detection methods mainly use DR (Digital Radiography) and CT (Computed Tomography) equipment. However, these methods can only capture images of the battery in a static state and cannot understand the dynamic process of battery thermal runaway. Utility Model Content

[0003] This invention addresses the technical problem that existing observation methods cannot effectively observe internal structural changes during the thermal runaway process of lithium-ion batteries, and provides an internal observation device for the thermal runaway process of lithium-ion batteries.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] An internal observation device for the thermal runaway process of a lithium-ion battery includes an X-ray system, a battery thermal runaway triggering device, a high-speed imaging system, and an observation and control system. The X-ray system is used to emit X-rays onto the lithium-ion battery, the battery thermal runaway triggering device is used to trigger thermal runaway of the lithium-ion battery, the high-speed imaging system is used to image the lithium-ion battery, and the observation and control system is communicatively connected to the battery thermal runaway triggering device and the high-speed imaging system.

[0006] The beneficial effects of this invention are as follows: During testing, the lithium-ion battery is first installed, along with the X-ray system and the high-speed imaging system. The relative positions of both systems with respect to the lithium-ion battery are adjusted until the X-ray system reaches a suitable emission position to emit X-rays onto the lithium-ion battery, and the high-speed imaging system reaches a suitable shooting angle. Then, the observation and control system controls the battery thermal runaway triggering device to trigger thermal runaway of the lithium-ion battery and conducts observation experiments. During the experiment, the X-ray system emits X-rays that penetrate the interior of the lithium-ion battery. The high-speed imaging system continuously performs X-ray imaging of the internal structure of the lithium-ion battery and saves the data. The observation and control system reads and processes the data saved by the high-speed imaging system, thereby effectively capturing images of the internal structural changes during the thermal runaway of the lithium-ion battery, solving the current problem of not being able to observe the internal structure in real time.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the high-speed imaging system includes a base, a high-speed camera mounted on the base, and an image intensifier mounted on the high-speed camera. The high-speed camera is communicatively connected to the observation and control system and is used to photograph lithium-ion batteries.

[0009] The beneficial effects of adopting the above-mentioned further scheme are as follows: During the test, the invisible X-ray image is converted into a visible light image by the image intensifier, and the image brightness is significantly enhanced. Under the action of the X-ray system, the high-speed camera continuously performs X-ray imaging of the internal structure of the lithium-ion battery and saves the data. The observation and control system reads and processes the data saved by the high-speed camera, and then monitors the changes in the internal runaway process of the lithium-ion battery in real time.

[0010] Furthermore, the high-speed imaging system includes a second base and a photon counting module mounted on the second base. The photon counting module is communicatively connected to the observation and control system. The photon counting module is used to collect X-rays passing through the lithium-ion battery to achieve photoelectric conversion.

[0011] The beneficial effect of adopting the above-mentioned further scheme is that during the test, the energy distribution after X-rays penetrate the battery is identified and counted by the photon counting module, forming an image transmitted to the observation and control system to monitor the changes in the internal runaway process of the lithium-ion battery in real time.

[0012] Furthermore, the X-ray system includes an X-ray generator for emitting X-rays onto the lithium-ion battery.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that during the experiment, X-rays are emitted by an X-ray generator and penetrate the inside of the lithium-ion battery to observe the internal changes of the lithium-ion battery.

[0014] Furthermore, it also includes a vertical telescopic platform, the telescopic end of which can move vertically and is used to install lithium-ion batteries.

[0015] The beneficial effect of adopting the above-mentioned further solution is that when installing the lithium-ion battery, the vertical height of the lithium-ion battery can be adjusted by activating the vertical telescopic platform to ensure that both the X-ray system and the high-speed imaging system can achieve a suitable relative position with respect to the lithium-ion battery.

[0016] Furthermore, it also includes a rotating platform installed at the telescopic end of the vertical telescopic platform, the rotating platform being used to install lithium-ion batteries.

[0017] The beneficial effect of adopting the above-mentioned further solution is that when installing the lithium-ion battery, the lithium-ion battery can be rotated by starting the rotating platform, and the orientation angle of the lithium-ion battery can be adjusted so that the lithium-ion battery reaches a suitable angle to receive the X-rays emitted by the X-ray system.

[0018] Furthermore, the battery thermal runaway triggering device includes at least one of a heating triggering mechanism, a needle puncture triggering mechanism, and an overcharge triggering mechanism.

[0019] The beneficial effects of adopting the above-mentioned further solutions are as follows: when the lithium-ion battery is triggered to thermal runaway by controlling the battery thermal runaway triggering device through the heating triggering mechanism, the lithium-ion battery is heated by an external heat source; when the lithium-ion battery is triggered to thermal runaway by controlling the battery thermal runaway triggering device through the needle puncture triggering mechanism, the battery is punctured with a steel needle to cause an internal short circuit, thereby triggering thermal runaway; when the lithium-ion battery is triggered to thermal runaway by controlling the battery thermal runaway triggering device through the overcharge triggering mechanism, the battery is continuously charged to exceed its rated capacity, thereby triggering thermal runaway.

[0020] Furthermore, it also includes a radiation protection system, which includes a fireproof chamber, and the X-ray system, battery thermal runaway triggering device, and high-speed imaging system are all installed inside the fireproof chamber.

[0021] The beneficial effect of adopting the above-mentioned further scheme is that it ensures the safety of the experiment by setting up a fireproof chamber.

[0022] Furthermore, the radiation protection system also includes a protective cover installed inside the fireproof cabin, and the battery thermal runaway triggering device is installed inside the protective cover. The protective cover is used to cover the lithium-ion battery, and the protective cover has a radiation window and a camera window. The radiation window is configured to correspond to the X-ray system, and the camera window is configured to correspond to the high-speed imaging system.

[0023] The beneficial effects of adopting the above-mentioned further scheme are: during the test, the fireproof chamber acts as a battery thermal runaway trigger device to isolate the X-ray system and the high-speed imaging system respectively, thereby improving safety; during the test, the X-ray emitted by the X-ray system acts on the lithium-ion battery through the X-ray window, and the high-speed imaging system continuously performs X-ray imaging of the internal structure of the lithium-ion battery through the camera window and saves the images for the observation and control system to read. Attached Figure Description

[0024] Figure 1 This is the first structural diagram of the present invention;

[0025] Figure 2 This is the second structural diagram of the present invention;

[0026] Figure 3 This is a diagram showing the installation structure of the lithium-ion battery of this utility model.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Lithium-ion battery; 11. Vertical telescopic platform; 12. Rotating platform; 121. Fixed base; 122. Rotating base; 123. Drive motor;

[0029] 2. X-ray system; 21. X-ray generator;

[0030] 3. Battery thermal runaway triggering device;

[0031] 4. High-speed imaging system; 41. Base No. 1; 42. High-speed camera; 43. Image intensifier; 44. Base No. 2; 45. Photon counting module;

[0032] 5. Observation and control system; 51. Data acquisition system; 52. Battery tester;

[0033] 6. Radiation protection system; 61. Fireproof chamber; 62. Protective cover; 621. Radiation window; 622. Camera window; 63. Exhaust pipe. Detailed Implementation

[0034] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0035] Example 1

[0036] like Figure 1 and Figure 2 An internal observation device for the thermal runaway process of a lithium-ion battery includes an X-ray system 2, a battery thermal runaway triggering device 3, a high-speed imaging system 4, and an observation and control system 5. The X-ray system 2 is used to emit X-rays to the lithium-ion battery 1, the battery thermal runaway triggering device 3 is used to trigger the lithium-ion battery 1 to undergo thermal runaway, the high-speed imaging system 4 is used to photograph the lithium-ion battery 1, and the observation and control system 5 is communicatively connected to the battery thermal runaway triggering device 3 and the high-speed imaging system 4.

[0037] The beneficial effects of this embodiment are as follows: During testing, the lithium-ion battery 1 is first installed, and the X-ray system 2 and high-speed imaging system 4 are also installed. The relative positions of the two systems with respect to the lithium-ion battery 1 are adjusted until the X-ray system 2 reaches a suitable emission position to emit X-rays to the lithium-ion battery 1, and the high-speed imaging system 4 reaches a suitable shooting angle. Then, the observation control system 5 controls the battery thermal runaway triggering device 3 to trigger the thermal runaway of the lithium-ion battery 1 and conducts an observation test. During the test, the X-ray system 2 emits X-rays that penetrate the interior of the lithium-ion battery 1. The high-speed imaging system 4 continuously performs X-ray imaging of the internal structure of the lithium-ion battery 1 and saves the data. The observation control system 5 reads and processes the data saved by the high-speed imaging system 4, thereby effectively capturing images of the changes in the internal structure of the lithium-ion battery 1 during the thermal runaway process, solving the current problem of not being able to observe the internal structure in real time.

[0038] As the experiment proceeds, during the thermal runaway process of lithium-ion battery 1, the electrodes and separator undergo structural changes, which then extend to the unrunaway area. The changes in the internal runaway process can be reconstructed by the materials collected by the subsequent high-speed imaging system 4.

[0039] Based on the above embodiments, the observation and control system 5 includes a data acquisition system 51 and a battery tester 52 interconnected therewith. The battery tester 52 can be a voltage clamp or battery tester already available in the prior art, while the data acquisition system 51 can be a computer or similar device with data acquisition software installed. The battery thermal runaway triggering device 3 can be connected to the battery tester 52 via wires, and the high-speed imaging system 4 can be connected to the data acquisition system 51 via wires.

[0040] Example 2

[0041] like Figure 1Based on Embodiment 1, the high-speed imaging system 4 includes a base 41, a high-speed camera 42 mounted on the base 41, and an image intensifier 43 mounted on the high-speed camera 42. The high-speed camera 42 is communicatively connected to the observation and control system 5 and is used to photograph the lithium-ion battery 1.

[0042] The beneficial effect of adopting the preferred solution in the above embodiments is that, during the test, the invisible X-ray image is converted into a visible light image by the image intensifier 43, and the image brightness is significantly enhanced. Under the action of the X-ray system, the high-speed camera 42 continuously performs X-ray imaging of the internal structure of the lithium-ion battery 1 and saves the data. The observation and control system 5 reads and processes the data saved by the high-speed camera 42, and then monitors the changes in the internal runaway process of the lithium-ion battery 1 in real time.

[0043] Example 3

[0044] like Figure 2 Based on Embodiment 1, the high-speed imaging system 4 includes a second base 44 and a photon counting module 45 mounted on the second base 44. The photon counting module 45 is communicatively connected to the observation and control system 5. The photon counting module 45 is used to collect X-rays passing through the lithium-ion battery 1 to achieve photoelectric conversion.

[0045] The beneficial effect of adopting the preferred scheme in the above embodiments is that, during the test, the energy distribution after X-rays penetrate the battery is identified and counted by the photon counting module 45, forming an image transmitted to the observation and control system 5, so as to monitor the changes in the internal runaway process of the lithium-ion battery 1 in real time.

[0046] Example 4

[0047] like Figure 1 and Figure 2 Based on embodiments 1, 2 or 1, 3, the X-ray system 2 includes an X-ray generator 21, which is used to emit X-rays onto the lithium-ion battery 1.

[0048] The advantage of adopting the preferred scheme in the above embodiments is that, during the experiment, X-rays are emitted by the X-ray generator 21 and penetrate the interior of the lithium-ion battery 1 to observe the internal changes of the lithium-ion battery 1.

[0049] The X-ray generator 21 can be a diffractometer.

[0050] Based on Embodiments 1, 2 or 1, 3, and Embodiment 4, the X-ray system 2 further includes a first linear drive and a second linear drive mounted on the drive end of the first linear drive. The drive directions of the first and second linear drives are both horizontal and perpendicular to each other. The X-ray generator 21 is mounted on the drive end of the second linear drive.

[0051] The beneficial effect of adopting the preferred solution in the above embodiments is that, when installing the X-ray generator 21, the position of the X-ray generator 21 in the horizontal height can be adjusted by activating the first linear drive and the second linear drive, so that the X-ray generator 21 reaches a suitable position for emitting X-rays to the lithium-ion battery 1.

[0052] As a specific embodiment of the above, both the first linear drive unit and the second linear drive unit can be at least one of a cylinder, an electric cylinder, a linear motor, and a synchronous belt linear module.

[0053] Example 5

[0054] like Figures 1 to 3 Based on embodiments 1, 2 or 1, 3, and 4, the internal observation device for the thermal runaway process of the lithium-ion battery described in this utility model further includes a vertical telescopic platform 11, the telescopic end of which can move vertically and is used to install the lithium-ion battery 1.

[0055] The beneficial effect of adopting the preferred solution in the above embodiments is that when installing the lithium-ion battery 1, the vertical height of the lithium-ion battery 1 can be adjusted by activating the vertical telescopic platform 11 to ensure that both the X-ray system 2 and the high-speed imaging system 4 can reach a suitable relative position with respect to the lithium-ion battery 1.

[0056] As a specific embodiment of the above, the vertical telescopic platform 11 may be at least one of a cylinder, an electric cylinder, a linear motor, and a synchronous belt linear module.

[0057] Example 6

[0058] like Figures 1 to 3 Based on embodiments 1, 2 or 1, 3, and 4-5, the internal observation device for the thermal runaway process of the lithium-ion battery described in this utility model further includes a rotating platform 12 installed at the telescopic end of the vertical telescopic platform 11. The rotating platform 12 is used to install the lithium-ion battery 1.

[0059] The beneficial effect of adopting the preferred solution in the above embodiments is that when installing the lithium-ion battery 1, the lithium-ion battery 1 can be rotated by starting the rotating platform 12, and the orientation angle of the lithium-ion battery 1 can be adjusted so that the lithium-ion battery 1 reaches a suitable angle to receive the X-rays emitted by the X-ray system 2.

[0060] As a specific embodiment of the above, the rotating platform 12 includes a fixed base 121, a rotating base 122 rotatably connected to the upper side of the fixed base 121, and a drive motor 123 whose drive shaft is driven and connected to the rotating base 122. The fixed base 121 is installed at the telescopic end of the vertical telescopic platform 11; the rotating base 122 is used to install the lithium-ion battery 1; and the drive shaft of the drive motor 123 can transmit power to the rotating base 122 through a gear set, a synchronous belt gear mechanism, etc., or the drive shaft of the drive motor 123 can be coaxially connected to the rotating base 122.

[0061] Example 7

[0062] like Figure 1 and Figure 2 Based on embodiments 1, 2 or 1, 3, and 4-6, the battery thermal runaway triggering device 3 includes at least one of a heating triggering mechanism, a needle puncture triggering mechanism, and an overcharge triggering mechanism.

[0063] The beneficial effects of the preferred scheme in the above embodiments are that when the lithium-ion battery 1 is triggered to thermal runaway by the battery thermal runaway triggering device 3 controlled by the heating triggering mechanism, the lithium-ion battery 1 is heated by an external heat source; when the lithium-ion battery 1 is triggered to thermal runaway by the battery thermal runaway triggering device 3 controlled by the needle puncture triggering mechanism, the battery is punctured with a steel needle to cause an internal short circuit, thereby triggering thermal runaway; when the lithium-ion battery 1 is triggered to thermal runaway by the battery thermal runaway triggering device 3 controlled by the overcharge triggering mechanism, the battery is continuously charged to exceed its rated capacity, thereby triggering thermal runaway.

[0064] For example, a mica heating element can be used as the heating trigger mechanism.

[0065] Example 8

[0066] like Figure 1 and Figure 2 Based on embodiments 1, 2 or 1, 3, and 4-7, the internal observation device for the thermal runaway process of the lithium-ion battery described in this utility model further includes a radiation protection system 6. The radiation protection system 6 includes a fireproof chamber 61, and the X-ray system 2, the battery thermal runaway triggering device 3, and the high-speed imaging system 4 are all installed inside the fireproof chamber 61.

[0067] The advantage of adopting the preferred solution in the above embodiments is that the safety of the experiment is ensured by setting up the fireproof chamber 61.

[0068] Example 9

[0069] like Figure 1 and Figure 2Based on embodiments 1, 2 or 1, 3, and 4-8, the radiation protection system 6 further includes a protective cover 62 disposed within the fireproof chamber 61, a battery thermal runaway triggering device 3 disposed within the protective cover 62, the protective cover 62 is used to cover the lithium-ion battery 1, and the protective cover 62 has a radiation window 621 and a camera window 622, the radiation window 621 is disposed corresponding to the X-ray system 2, and the camera window 622 is disposed corresponding to the high-speed imaging system 4.

[0070] The beneficial effect of adopting the preferred scheme in the above embodiments is that, during the test, the fireproof chamber 61 forms a battery thermal runaway triggering device 3 to isolate the X-ray system 2 and the high-speed imaging system 4 respectively, thereby improving safety; during the test, the X-rays emitted by the X-ray system 2 act on the lithium-ion battery 1 through the X-ray window 621, and the high-speed imaging system 4 continuously performs X-ray imaging of the internal structure of the lithium-ion battery 1 through the camera window 622 and saves it for the observation and control system 5 to read.

[0071] Based on the above embodiment, the protective cover 62 is connected to an exhaust pipe 63. One end of the exhaust pipe 63 is connected to the protective cover 62, and the other end extends out of the fireproof chamber 61 for post-experiment purification treatment and to discharge jet smoke from the protective cover 62.

[0072] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0075] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An internal observation device for the thermal runaway process of a lithium-ion battery, characterized in that, The system includes an X-ray system (2), a battery thermal runaway triggering device (3), a high-speed imaging system (4), and an observation and control system (5). The X-ray system (2) is used to emit X-rays to the lithium-ion battery (1). The battery thermal runaway triggering device (3) is used to trigger the lithium-ion battery (1) to undergo thermal runaway. The high-speed imaging system (4) is used to photograph the lithium-ion battery (1). The observation and control system (5) is communicatively connected to the battery thermal runaway triggering device (3) and the high-speed imaging system (4).

2. The internal observation device for the thermal runaway process of a lithium-ion battery according to claim 1, characterized in that, The high-speed imaging system (4) includes a base (41), a high-speed camera (42) mounted on the base (41), and an image intensifier (43) mounted on the high-speed camera (42). The high-speed camera (42) is communicatively connected to the observation and control system (5). The high-speed camera (42) is used to photograph the lithium-ion battery (1).

3. The internal observation device for the thermal runaway process of a lithium-ion battery according to claim 1, characterized in that, The high-speed imaging system (4) includes a second base (44) and a photon counting module (45) mounted on the second base (44). The photon counting module (45) is communicatively connected to the observation and control system (5). The photon counting module (45) is used to collect X-rays passing through the lithium-ion battery (1) to achieve photoelectric conversion.

4. The internal observation device for the thermal runaway process of a lithium-ion battery according to claim 1, characterized in that, The X-ray system (2) includes an X-ray generator (21) for emitting X-rays onto the lithium-ion battery (1).

5. The internal observation device for the thermal runaway process of a lithium-ion battery according to claim 1, characterized in that, It also includes a vertical telescopic platform (11), the telescopic end of which can move vertically and is used to install lithium-ion batteries (1).

6. The internal observation device for the thermal runaway process of a lithium-ion battery according to claim 5, characterized in that, It also includes a rotating platform (12) installed at the telescopic end of the vertical telescopic platform (11), the rotating platform (12) being used to install the lithium-ion battery (1).

7. The internal observation device for the thermal runaway process of a lithium-ion battery according to claim 1, characterized in that, The battery thermal runaway triggering device (3) includes at least one of a heating triggering mechanism, a needle puncture triggering mechanism, and an overcharge triggering mechanism.

8. The internal observation device for the thermal runaway process of a lithium-ion battery according to any one of claims 1-7, characterized in that, It also includes a radiation protection system (6), which includes a fireproof chamber (61), and the X-ray system (2), the battery thermal runaway triggering device (3) and the high-speed imaging system (4) are all located in the fireproof chamber (61).

9. The internal observation device for the thermal runaway process of a lithium-ion battery according to claim 8, characterized in that, The radiation protection system (6) also includes a protective cover (62) installed inside the fireproof cabin (61). The battery thermal runaway triggering device (3) is installed inside the protective cover (62). The protective cover (62) is used to cover the lithium-ion battery (1). The protective cover (62) has a radiation window (621) and a camera window (622). The radiation window (621) is corresponding to the X-ray system (2), and the camera window (622) is corresponding to the high-speed imaging system (4).

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