Battery detection device and method thereof

Abstract

The invention relates to a battery detection device and method, and the device comprises a frame platform, a coupling liquid container, a scanning module, a probe clamping module, an ultrasonic excitation module, a battery clamping module, and a lifting module. The coupling liquid container is located in the frame platform, an opening is formed in one side of the coupling liquid container, and an inner cavity of the coupling liquid container is suitable for containing coupling liquid; the driving end of the scanning module is connected with the probe clamping module, and the scanning module is suitable for driving the probe clamping module to do planar motion; the ultrasonic excitation module is provided with an ultrasonic probe, and the ultrasonic probe is connected with the probe clamping module; the battery clamping module is suitable for mounting a battery to be tested, and the battery clamping module is connected with the driving end of the lifting module; the lifting module is suitable for driving the battery clamping module to enter and exit from the inner cavity of the coupling liquid container. Compared with a traditional detection mode, the method has the advantages that the to-be-detected battery does not need to be disassembled and assembled in the coupling liquid, and the convenience and safety of the operation process are effectively improved.

Description

Technical Field

[0001] This application relates to the field of battery testing technology, and in particular to a battery testing device and method. Background Technology

[0002] Lithium batteries have advantages such as high energy density, long cycle life, high coulombic efficiency, low self-discharge rate, low operating and maintenance costs, wide operating temperature range, and excellent reliability. Therefore, lithium batteries are being used more and more widely in various industries, and the testing of lithium batteries is becoming increasingly important. Ultrasonic non-destructive testing of batteries has emerged to meet this need. Ultrasonic non-destructive testing of batteries uses ultrasonic imaging technology to accurately reflect the internal structural distribution of the battery and the images of each interface, making it easier to accurately find internal defects in the battery.

[0003] In the process of ultrasonic non-destructive testing of batteries, in order to ensure imaging quality, the ultrasonic waves emitted by the ultrasonic probe need to be transmitted to the battery under test through a coupling fluid. Therefore, during the test, both the ultrasonic probe and the battery under test are located in the coupling fluid. Before the test, the operator needs to put his hand into the coupling fluid to install the battery under test into the preset test position. After the test is completed, the operator also needs to put his hand into the coupling fluid to remove the battery under test, which is very inconvenient. Summary of the Invention

[0004] In view of this, this application proposes a battery testing device and method to avoid disassembling and installing the battery to be tested in a coupling fluid.

[0005] According to one aspect of this application, a battery testing device is provided, comprising: a frame platform, a coupling liquid container, a scanning module, a probe clamping module, an ultrasonic excitation module, a battery clamping module, and a lifting module;

[0006] The coupling fluid container is located inside the frame platform, and an opening is provided on one side of the coupling fluid container. The internal cavity of the coupling fluid container is suitable for holding the coupling fluid.

[0007] The scanning module is mounted on the frame platform, and the driving end of the scanning module is connected to the probe clamping module. The scanning module is suitable for driving the probe clamping module to perform planar motion.

[0008] The ultrasonic excitation module is equipped with an ultrasonic probe, which is connected to the probe clamping module.

[0009] The battery clamping module is suitable for mounting the battery to be tested. The battery clamping module is matched with the coupling liquid container. The battery clamping module is located at the opening of the coupling liquid container. The battery clamping module is connected to the drive end of the lifting module.

[0010] The lifting module is mounted on the frame platform and is positioned close to the coupling fluid container. The lifting module is adapted to drive the battery clamping module into and out of the internal cavity of the coupling fluid container.

[0011] In one possible implementation, the coupling liquid container includes: a container body, a flow rate regulating device, and a temperature control device;

[0012] The container body has an opening on one side, and the side wall of the container body has a liquid inlet and a liquid outlet, which are arranged opposite to each other.

[0013] The flow rate regulating device is disposed adjacent to the container body, and the inlet and outlet ends of the flow rate regulating device are respectively connected to the inlet and the outlet.

[0014] The temperature control device is arranged adjacent to the flow rate regulating device, and the temperature control device is suitable for heating or cooling the coupling agent flowing through the flow rate regulating device.

[0015] The container body is also equipped with a bubble elimination device, which covers the liquid inlet.

[0016] In one possible implementation, the main body of the bubble-eliminating device is a shell structure;

[0017] The bubble elimination device has an opening on one side and a through hole on the other side. There are two or more through holes. The bubble elimination device is located inside the cavity of the coupling agent tank. The opening side of the bubble elimination device is attached to the liquid inlet.

[0018] In one possible implementation, the scanning module includes: a first servo slide rail and a second servo slide rail;

[0019] The first servo slide rail is mounted on the frame platform, and the first servo slide rail and the second servo slide rail are arranged intersectingly;

[0020] The second servo slide rail is mounted on the slider of the first servo slide rail, and the probe clamping module is mounted on the slider of the second servo slide rail.

[0021] In one possible implementation, the probe clamping module includes: a spacing adjustment module, a mounting arm, and an angle adjustment module;

[0022] The spacing adjustment module is connected to the drive end of the scanning module, and the spacing adjustment module is provided with a guide rail;

[0023] One end of the mounting arm is slidably connected to the guide rail, and the other end of the mounting arm is connected to the angle adjustment module;

[0024] The spacing adjustment module is also provided with a positioning device, which is connected to the spacing adjustment module and the mounting arm respectively. The positioning device is suitable for controlling the sliding position of the mounting arm.

[0025] The angle adjustment module is connected to the ultrasonic probe.

[0026] In one possible implementation, the positioning device includes a probe lead screw and an adjustment knob;

[0027] The probe lead screw is rotatably connected to the spacing adjustment module, and the probe lead screw rotates along its axis. The axis of the probe lead screw is aligned with the orientation of the guide rail.

[0028] The adjustment knob is located at one end of the probe lead screw;

[0029] The mounting arm has an internal threaded hole that matches the probe lead screw, and the probe lead screw passes through the mounting arm via the internal threaded hole.

[0030] In one possible implementation, the angle adjustment module includes: a locking housing and a retainer;

[0031] The inner wall of the cavity of the locking shell is a concave spherical surface, and the locking shell is provided with a first clearance hole, which communicates with the cavity of the locking shell.

[0032] The retainer is located inside the cavity of the locking shell, and the outer side wall of the retainer is a convex spherical surface, which matches the inner side wall of the cavity of the locking shell.

[0033] The cage has mounting holes, and the ultrasonic probe is connected to the cage through the mounting holes, with the mounting holes facing the first clearance hole.

[0034] In one possible implementation, the battery clamping module includes a mounting bracket and a battery clamp;

[0035] The mounting bracket is connected to the drive end of the lifting module;

[0036] The battery clamp is slidably mounted on the mounting bracket and is suitable for holding the battery to be tested.

[0037] In one possible implementation, the battery clamp includes: a mounting base plate, grippers, and an adjusting slider;

[0038] One side of the mounting base plate is provided with an adjustment guide rail and a gripper guide rail. One end of the adjustment guide rail faces the middle of the gripper guide rail, and the adjustment guide rail and the gripper guide rail are arranged in a T-shape.

[0039] The grippers are slidably mounted on the gripper slide rail, and there are two or more grippers.

[0040] The adjusting slider is slidably mounted on the adjusting slide rail. The adjusting slider is provided with a connecting rod, and the two ends of the connecting rod are respectively hinged to the adjusting slider and the gripper.

[0041] There are two or more connecting rods, and the two or more connecting rods are respectively hinged to two or more grippers;

[0042] The adjusting slider is also provided with a lug and a clamping screw. The lug and the adjusting guide rail are located on the same side of the mounting base. The adjusting screw passes through the lug and is connected to the adjusting slider. The clamping screw matches the lug. The clamping screw is suitable for applying pressure to the adjusting slider. The direction of the applied pressure is along the adjusting guide rail away from the clamping guide rail.

[0043] According to another aspect of this application, a battery testing method is provided, which tests the battery to be tested based on any of the above-described apparatus, comprising:

[0044] Using the ultrasonic probe of the ultrasonic excitation module, an ultrasonic signal is emitted to the detection surface of the battery under test in air or coupling fluid, and at least one of transmitted ultrasonic signal and reflected ultrasonic signal is received.

[0045] The ultrasonic probe is driven to perform planar motion based on the detection surface of the battery to be tested using a scanning module, and the position coordinates of the ultrasonic probe are obtained.

[0046] Based on the position coordinates, at least one of the corresponding transmitted ultrasonic signal and the reflected ultrasonic signal is stored in a pre-constructed detection coordinate matrix. Based on at least one of the transmitted ultrasonic signal and the reflected ultrasonic signal stored in the detection coordinate matrix, the detection result of the detection surface of the battery to be tested is obtained.

[0047] This application applies to ultrasonic non-destructive testing of batteries. The frame platform provides the overall mounting foundation, and the coupling fluid container is suitable for holding the coupling fluid. During testing, the battery clamping module immerses the battery under test in the coupling fluid, and the ultrasonic probe located in the probe clamping module is also immersed in the coupling fluid. Ultrasonic testing is performed on the battery under test. The scanning module controls the probe clamping module to perform planar movement, thereby driving the ultrasonic probe to perform a surface scan of the battery under test. The ultrasonic excitation module transmits and receives ultrasonic waves through the ultrasonic probe, realizing ultrasonic testing of the battery under test. By setting up a lifting module to control the battery clamping module to enter and exit the internal cavity of the coupling fluid container through the opening, the battery under test placed in the battery clamping module can be immersed in and removed from the coupling fluid. This facilitates the disassembly and installation of the battery under test outside the coupling fluid. Compared with traditional testing methods, there is no need to disassemble and install the battery under test in the coupling fluid, effectively improving the convenience and safety of the operation process.

[0048] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0049] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0050] Figure 1 This diagram shows the main structure of the battery detection device according to an embodiment of this application;

[0051] Figure 2 This application shows a main structural diagram of the frame platform, battery clamping module, and lifting module according to an embodiment of the present application;

[0052] Figure 3 This diagram shows the main structure of the battery clamp according to an embodiment of this application;

[0053] Figure 4 A top view of the battery clamp according to an embodiment of this application is shown;

[0054] Figure 5 This diagram shows the main structure of the locking device according to an embodiment of this application;

[0055] Figure 6 A schematic diagram showing the battery clamp and clamp guide rail according to an embodiment of this application is provided.

[0056] Figure 7 This diagram shows the main structural structure of the coupling liquid container according to an embodiment of this application;

[0057] Figure 8 This diagram shows the main structure of the probe clamping module according to an embodiment of this application.

[0058] Figure 9 This diagram illustrates the main structure of the spacing adjustment module according to an embodiment of this application.

[0059] Figure 10 This diagram illustrates the main structure of the angle adjustment module according to an embodiment of this application.

[0060] Figure 11 A side sectional view of the angle adjustment module according to an embodiment of this application is shown;

[0061] Figure 12 A flowchart illustrating a battery detection method according to an embodiment of this application is shown. Detailed Implementation

[0062] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0063] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application or to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0064] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0065] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0066] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0067] Figure 1 This diagram illustrates the main structure of a battery detection device according to an embodiment of this application. Figure 1 As shown, the battery testing device is characterized by comprising: a frame platform 1000, a coupling fluid container 2000, a scanning module 3000, a probe clamping module 4000, an ultrasonic excitation module, a battery clamping module 6000, and a lifting module 7000; the coupling fluid container 2000 is located inside the frame platform 1000, and has an opening on one side; the internal cavity of the coupling fluid container 2000 is suitable for holding coupling fluid; the scanning module 3000 is mounted on the frame platform 1000, and its driving end is connected to the probe clamping module 4000; the scanning module 3000 is suitable for driving the probe clamping module 4000 to perform planar motion. Movement; The ultrasonic excitation module is equipped with an ultrasonic probe 5100, which is connected to the probe clamping module 4000; The battery clamping module 6000 is suitable for installing the battery to be tested. The battery clamping module 6000 is matched with the coupling liquid container 2000 and is located at the opening of the coupling liquid container 2000. The battery clamping module 6000 is connected to the drive end of the lifting module 7000; The lifting module 7000 is set on the frame platform 1000 and is located close to the coupling liquid container 2000. The lifting module 7000 is suitable for driving the battery clamping module 6000 to enter and exit the internal cavity of the coupling liquid container 2000.

[0068] This application applies to ultrasonic non-destructive testing of batteries. The frame platform 1000 provides the overall mounting base, and the coupling fluid container 2000 is suitable for holding the coupling fluid. During testing, the battery clamping module 6000 immerses the battery under test in the coupling fluid, and the ultrasonic probe 5100 located in the probe clamping module 4000 is also immersed in the coupling fluid. Ultrasonic testing is performed on the battery under test. The scanning module 3000 controls the probe clamping module 4000 to perform planar movement, thereby driving the ultrasonic probe 5100 to perform a surface scan of the battery under test. The ultrasonic excitation module transmits and receives ultrasonic waves through the ultrasonic probe 5100, realizing the ultrasonic testing of the battery under test. By setting up a lifting module 7000 to control the battery clamping module 6000 to enter and exit the internal cavity of the coupling liquid container 2000 through the opening of the coupling liquid container 2000, the battery to be tested, which is placed in the battery clamping module 6000, can be immersed in the coupling liquid and removed from the coupling liquid. This facilitates the disassembly and installation of the battery to be tested outside the coupling liquid. Compared with the traditional testing method, there is no need to disassemble and install the battery to be tested in the coupling liquid, which effectively improves the convenience and safety of the operation process.

[0069] Furthermore, this application can also control the displacement range of the probe clamp module solely through the scanning module 3000, and control the battery under test, arranged in the battery clamping module 6000, to be immersed in or above the coupling fluid through the lifting module 7000. This enables high-precision testing using the immersion method, where both the ultrasonic probe 5100 and the battery under test are located in the coupling fluid for ultrasonic testing, and high-efficiency testing using the air coupling method, where both the ultrasonic probe 5100 and the battery under test are located in the air for ultrasonic testing. Switching between the two testing modes is convenient, further improving the adaptability of this application.

[0070] In one possible implementation, such as Figure 7 As shown, the coupling fluid container 2000 includes: a container body 2100, a flow rate regulating device 2200, and a temperature control device 2300; the container body 2100 has an opening on one side, and an inlet and an outlet are provided on the side wall of the container body 2100, which are arranged opposite to each other; the flow rate regulating device 2200 is arranged adjacent to the container body 2100, and its inlet and outlet ends are respectively connected to the inlet and outlet; the temperature control device 2300 is arranged adjacent to the flow rate regulating device 2200, and the temperature control device 2300 is used to heat or cool the coupling agent flowing through the flow rate regulating device 2200; the container body 2100 is also provided with a bubble elimination device 2110, which covers the inlet.

[0071] By providing a flow rate regulating device 2200 connected to the inlet and outlet, the coupling fluid inside the container body 2100 enters the flow rate regulating device 2200 through the outlet. After being pressurized by the flow rate regulating device 2200, it flows back into the container body 2100 through the inlet, thus achieving a flow of the coupling fluid inside the container body 2100 from the inlet to the outlet. A temperature control device 2300 heats or cools the coupling fluid flowing through the flow rate regulating device 2200, and the heated or cooled coupling fluid enters the container body 2100 through the inlet. A bubble elimination device 2110 eliminates bubbles in the coupling fluid entering the container body 2100 through the inlet, preventing bubbles in the coupling fluid from affecting ultrasonic detection. Compared to the traditional method of directly heating or cooling the coupling fluid, this application, by providing the flow rate regulating device 2200 and the temperature control device 2300, keeps the coupling fluid flowing during heating or cooling, thereby ensuring uniform internal temperature of the coupling fluid.

[0072] The flow rate regulating device 2200 and the temperature control device 2300 employ commonly used techniques in the art. For example, a variable frequency pump is used to regulate the flow rate by adjusting the pump speed, and a PID power control device is used to regulate the temperature. Those skilled in the art can flexibly configure the device for their specific application scenarios, as long as the flow rate regulating device 2200 can provide a flow rate control range of 10L / min to 120L / min, and the temperature control device can provide a heating / cooling temperature range of -40℃ to 80℃.

[0073] In one possible implementation, the container body 2100 is further provided with a viewing window 2130, a handle 2120, an insulation layer, a temperature sensor, and a drain port 2400; the viewing window 2130 is located on one side of the container body 2100; there are two or more handles 2120, which are respectively located on opposite sides of the container body 2100; the insulation layer covers the outer wall of the container body 2100; there are two or more temperature sensors, whose probes are respectively located near the inlet, outlet, and the middle of the container body 2100; the drain port 2400 is opened on the side wall of the container body 2100, and the drain port 2400 is located on the side of the container body 2100 away from the container body 2100 where there is an opening.

[0074] In one possible implementation, the main body of the bubble elimination device 2110 is a shell structure; the bubble elimination device 2110 has an opening on one side and a through hole on the other side, with two or more through holes; the bubble elimination device 2110 is located inside the cavity of the container body 2100; and the opening side of the bubble elimination device 2110 is fastened to the liquid inlet.

[0075] By setting up a bubble elimination device 2110, when the heated or cooled coupling fluid enters the container body 2100 through the inlet, it first enters the bubble elimination device 2110 through the opening, and then enters the cavity of the container body 2100 through the through hole of the bubble elimination device 2110. When the coupling fluid passes through the through hole of the bubble elimination device 2110, the large bubbles in the coupling fluid are broken up, and the overall flow rate of the coupling fluid is reduced, so that the small bubbles formed by the breakup float on the surface of the liquid, thereby achieving bubble elimination.

[0076] Furthermore, the main body of the bubble-eliminating device 2110 is in the shape of a rectangular plate, with openings and through holes respectively located on opposite sides of the rectangular plate structure. Two or more through holes are arranged in a matrix.

[0077] like Figure 7As shown, the main body of the container 2100 has a rectangular structure; there are four liquid inlets located on the same side wall of the container 2100, arranged in a rectangular pattern; there are also four liquid outlets located on the same side wall of the container 2100, arranged in a rectangular pattern. The rectangular arrangement of the liquid inlets and outlets ensures a more uniform flow of the coupling fluid as it flows through the container 2100.

[0078] Furthermore, the flow rate regulating device 2200 is connected to four liquid inlets via water distribution pipes 2500. For example... Figure 1 As shown, the main body of the water distribution pipe 2500 is H-shaped. The four ends of the water distribution pipe 2500 are connected to four liquid inlets, and the middle part of the water distribution pipe 2500 is connected to the liquid outlet of the flow rate regulating device 2200, thereby ensuring that the coupling fluid discharged by the flow rate regulating device 2200 is distributed more evenly to each liquid inlet. Similarly, the four liquid outlets are connected to the liquid inlet of the flow rate regulating device 2200 through another water distribution pipe 2500.

[0079] In one possible implementation, such as Figure 1 As shown, the scanning module 3000 includes: a first servo slide rail 3100 and a second servo slide rail 3200; the first servo slide rail 3100 is mounted on the frame platform 1000, and the first servo slide rail 3100 and the second servo slide rail 3200 are arranged intersectingly; the second servo slide rail 3200 is mounted on the slider of the first servo slide rail 3100, and the probe clamping module 4000 is mounted on the slider of the second servo slide rail. By controlling the displacement of the sliders of the first servo slide rail 3100 and the second servo slide rail 3200 respectively, the probe clamping module 4000 is driven to perform planar motion.

[0080] Preferably, the frame platform 1000 also includes an electrical cabinet 1100, with the opening of the coupling fluid container 2000 and the electrical cabinet 1100 located on the same side of the frame platform 1000. A first servo slide rail 3100 is disposed on the outer wall of the electrical cabinet 1100, with its length direction perpendicular to that of the second servo slide rail 3200. The probe clamping module 4000 has an ultrasonic probe 5100 with one end facing the opening of the coupling fluid container 2000. The interior of the electrical cabinet 1100 is suitable for installing the ultrasonic excitation module and other electrical equipment.

[0081] In one possible implementation, such as Figure 8As shown, the probe clamping module 4000 includes: a spacing adjustment module 4100, a mounting arm 4200, and an angle adjustment module 4300; the spacing adjustment module 4100 is connected to the drive end of the scanning module 3000, and the spacing adjustment module 4100 is provided with a guide rail 4112; one end of the mounting arm 4200 is slidably connected to the guide rail 4112, and the other end of the mounting arm 4200 is connected to the angle adjustment module 4300; the spacing adjustment module 4100 is also provided with a positioning device, which is connected to both the spacing adjustment module 4100 and the mounting arm 4200, and the positioning device is suitable for controlling the sliding position of the mounting arm 4200; the angle adjustment module 4300 is connected to the ultrasonic probe 5100.

[0082] The main body of the spacing adjustment module 4100 is columnar, with one end connected to the slider of the second servo slide rail 3200. There are two or more mounting arms 4200, with their lengths parallel to each other, facilitating the placement of multiple ultrasonic probes 5100. The main body of each mounting arm 4200 is elongated, with one end slidably connected to the spacing adjustment module 4100 and the other end equipped with an angle adjustment module 4300. The overall structure is relatively simple, allowing the mounting arm 4200 to easily penetrate the cavity of the coupling fluid container 2000 and drive the ultrasonic probe 5100 to perform a surface scan of the battery under test. By setting the guide rail 4112 and positioning device, the spacing between the ultrasonic probe 5100 and the battery under test, or the spacing between the probes, can be adjusted, and the adjusted mounting arm 4200 remains stable.

[0083] It should be noted that the length direction of the guide rail 4112 is perpendicular to the length direction of the first servo slide rail 3100 and the length direction of the second servo slide rail 3200. That is, the length directions of the guide rail 4112, the first servo slide rail 3100 and the second servo slide rail 3200 can form a three-dimensional rectangular coordinate system. This allows the ultrasonic probe 5100 to perform planar motion in the plane containing the Z and Y axes and distance adjustment in the X axis direction within the constructed rectangular coordinate system, thereby adapting to different sizes of batteries to be tested and ultrasonic probes 5100 with different focusing distances.

[0084] In one possible implementation, the spacing adjustment module 4100 further includes a mounting plate 4110, which is located at one end of the spacing adjustment module 4100 along its length. The spacing adjustment module 4100 is connected to the slider of the second servo slide rail 3200 through the mounting plate 4110.

[0085] The positioning device includes a probe lead screw and an adjustment knob 4116; the probe lead screw is rotatably connected to the adjustment module, and the probe lead screw rotates along its axis, with the axis of the probe lead screw aligned with the orientation of the guide rail 4112; the adjustment knob 4116 is located at the end of the probe lead screw furthest from the mounting plate 4110; the mounting arm 4200 has an internal threaded hole that matches the probe lead screw, and the probe lead screw passes through the mounting arm 4200 via the internal threaded hole. The mounting arm 4200 is equipped with a mounting arm slider 4121. The mounting arm 4200 is slidably connected to the guide rail 4112 through the mounting arm slider 4121. Under the control of the mounting arm slider 4121, the mounting arm 4200 can only move linearly along the guide rail 4112. When the probe screw is rotated by rotating the adjustment knob 4116, the mounting arm 4200 moves along the guide rail 4112 under the cooperation of the probe screw and the internal thread hole. When the probe screw stops rotating, the current position of the mounting arm 4200 on the guide rail 4112 is kept stable.

[0086] In one possible implementation, the probe screw includes a positive thread section and a negative thread section; the outer wall thread of the positive thread section is a positive thread, and the outer wall thread of the negative thread section is a negative thread; both the positive thread section and the negative thread section are configured to pass through at least one mounting arm 4200.

[0087] Preferably, the probe lead screw has a positive thread section from one end to its middle along its length, and a negative thread section from the other end to its middle along its length. There are two mounting arms 4200, one on the positive thread section and the other on the negative thread section. In other words, the probe lead screw is split in two from the middle, with one end being a positive thread and the other a negative thread. Therefore, by rotating the probe lead screw, the two mounting arms 4200 can be moved closer or further apart, facilitating the adjustment of the distance between the pair of ultrasonic probes 5100 mounted on the two mounting arms 4200.

[0088] In one possible implementation, the spacing adjustment module 4100 further includes a support plate 4113. The main body of the support plate 4113 is elongated, and an elongated hole is formed in the middle of the support plate 4113, with the length direction of the elongated hole aligned with the length direction of the support plate 4113. A guide rail 4112 is disposed on one side of the support plate 4113, with the length direction of the guide rail 4112 aligned with the length direction of the elongated hole. The mounting arm slider 4121 and the guide rail 4112 are located on the same side of the support plate 4113, and the mounting arm slider 4121 and the mounting arm 4200 are located on opposite sides of the support plate 4113. One end of the mounting arm 4200 passes through the elongated hole and is connected to the slider. By setting the support plate 4113, a mounting base for the guide rail 4112 is provided.

[0089] Furthermore, there are two guide rails 4112, which are respectively set on opposite sides of the body width direction of the elongated hole. The mounting arm slider 4121 is slidably connected to the two rails to improve the stability of the mounting arm 4200.

[0090] In one possible implementation, the spacing adjustment module 4100 further includes a side plate 4114; the main body of the side plate 4114 is elongated, the length direction of the side plate 4114 is consistent with the length direction of the support plate 4113, and the side of the side plate 4114 is connected to one end of the support plate 4113 in the width direction; there are two side plates 4114, located at opposite ends of the support plate 4113 in the width direction. Figure 9 As shown, one end of the support plate 4113 is connected to the side of the mounting plate 4110, and the end faces of the support plate 4113 and the two side plates 4114 are arranged in an H-shape.

[0091] Furthermore, it also includes a connecting plate 4115, which is located on opposite sides of the support plate 4113, and the connecting plate 4115 is connected to the two side plates 4114 and the support plate 4113 respectively. The probe lead screw is installed through the connecting plate 4115 and is rotatably connected to the connecting plate 4115.

[0092] At least one side plate 4114 is provided with a scale line 4117, which is set along the length of the side plate 4114; the mounting arm 4200 is provided with a pointer 4125, which matches the scale line 4117.

[0093] In one possible implementation, the mounting arm 4200 is provided with a sensor adapter module 4124; the sensor adapter module 4124 is suitable for electrical connection with the ultrasonic probe 5100, and the sensor adapter module 4124 is provided with an adapter interface. By setting up the adapter module, it is convenient to fix and transfer the probe wire. The ultrasonic excitation module is electrically connected to the ultrasonic probe 5100 through the sensor adapter module 4124.

[0094] like Figure 9 As shown, one of the side plates 4114 has a first clearance elongated hole and a second clearance elongated hole, both of which are aligned with the length of the side plate 4114. The first clearance elongated hole is matched with a sensor module, which is mounted on a slider. One end of the sensor module has an adapter that protrudes from the first clearance elongated hole. A scale line 4117 is positioned near the second clearance elongated hole, and a pointer 4125 protrudes from the second clearance elongated hole and points to the scale line 4117, facilitating timely measurement of the distance between the two mounting arms 4200.

[0095] In one possible implementation, the mounting arm 4200 is also equipped with an encoder; the encoder is connected to the mounting arm 4200 and the spacing adjustment module 4100 respectively, and the encoder is used to output the position information of the mounting arm 4200 on the spacing adjustment module 4100 to the host computer. This can be achieved using common technical means in the field.

[0096] Furthermore, such as Figure 8 As shown, the mounting arm 4200 is provided with a mounting part 4210, and the angle adjustment module 4300 is mounted on the mounting arm 4200 through the mounting part 4210. There are two or more mounting parts 4210, and the two or more mounting parts 4210 are arranged along the length direction of the mounting arm 4200.

[0097] In one possible implementation, the mounting arm 4200 is provided with a third clearance elongated hole and connecting holes. The length direction of the third clearance elongated hole is the same as the length direction of the mounting arm 4200. There are two or more connecting holes, located on both sides of the width direction of the third clearance elongated hole, and arranged along the length direction of the mounting arm 4200. The angle adjustment device is installed on the mounting arm 4200 through the connecting holes and the appropriate bolts. The third clearance elongated hole is used to make way for the detection end of the ultrasonic probe 5100.

[0098] In one possible implementation, such as Figure 10 and Figure 11 As shown, the angle adjustment module 4300 includes: a locking module 4310 and a retainer 4320; the inner wall of the cavity of the locking module 4310 is a concave spherical surface, and the locking module 4310 has a first clearance hole 4313, which communicates with the cavity of the locking module 4310; the retainer 4320 is located inside the cavity of the locking module 4310, and the outer wall of the retainer 4320 is a convex spherical surface, which matches the inner wall of the cavity of the locking module 4310; the retainer 4320 has a mounting hole, and the ultrasonic probe 5100 is connected to the retainer 4320 through the mounting hole, with the mounting hole facing the first clearance hole 4313.

[0099] By placing the retainer 4320 inside the cavity of the locking module 4310, and with the locking module 4310 and retainer 4320 respectively having matching concave spherical inner walls and convex spherical outer walls, the retainer 4320 can rotate within the cavity of the locking module 4310 around the center of the sphere containing the spherical surface, thereby adjusting the orientation angle of the ultrasonic probe 5100 installed in the mounting hole. The probing end of the ultrasonic probe 5100, installed in the mounting hole, protrudes from the locking module 4310 through the first clearance hole 4313, ensuring that the probing end of the ultrasonic probe 5100 always faces the outside of the locking module 4310 during adjustment.

[0100] In one possible implementation, the locking module 4310 also has a second clearance hole, which communicates with the cavity of the locking module 4310. The first clearance hole 4313 is positioned opposite to the second clearance hole. A mounting hole penetrates the retainer 4320, with both ends of the mounting hole facing the first clearance hole 4313 and the second clearance hole, respectively. Figure 1 As shown, the adapted ultrasonic probe 5100 is installed through the mounting hole and the retainer 4320. The locking module 4310 is respectively provided with a first clearance hole 4313 and a second clearance hole, so that the probe end and the wiring end of the ultrasonic probe 5100 protrude from the first clearance hole 4313 and the second clearance hole, respectively, which facilitates the installation and wiring of the adapted ultrasonic probe 5100.

[0101] In one possible implementation, the retainer 4320 is provided with a connecting portion adapted to fix the adapted ultrasonic probe 5100 to the retainer 4320; the connecting portion is located on the side of the retainer 4320 near the second clearance hole, and the connecting portion protrudes from the second clearance hole. By providing the connecting portion, the adapted ultrasonic probe 5100 and the retainer 4320 can be detachably connected.

[0102] Furthermore, the connecting part includes an external threaded ring 4322 and a nut 4323; the external threaded ring 4322 is disposed on the side of the retainer 4320 near the second relief hole, and the external threaded ring 4322 protrudes out of the second relief hole; the nut 4323 matches the external threaded ring 4322, and the nut 4323 is sleeved on the external threaded ring 4322.

[0103] like Figure 2 As shown, the external threaded ring 4322 is coaxially arranged with the mounting hole. The inner diameter of the external threaded ring 4322 is larger than the inner diameter of the mounting hole, so that after the ultrasonic probe 5100 is inserted into the mounting hole, the protrusion near the wiring end of the ultrasonic probe 5100 is located inside the external threaded ring 4322 and abuts against the edge of the opening of the mounting hole. The nut 4323 has a flange facing into its hole. After the nut 4323 is installed on the external threaded ring 4322, the flange of the nut 4323 abuts against the protrusion of the ultrasonic probe 5100, realizing the installation of the ultrasonic probe 5100 and the retainer 4320.

[0104] In one possible implementation, the locking module 4310 is provided with an adjustment hole 4314, and the retainer 4320 is provided with an adjustment handle 4321; one end of the adjustment handle 4321 is connected to the outer side wall of the retainer 4320, and the other end of the adjustment handle 4321 protrudes from the locking module 4310 through the adjustment hole 4314. By providing the adjustment handle 4321, it is convenient to adjust the rotation angle of the retainer 4320.

[0105] The inner diameter of the adjustment hole 4314 is larger than the outer diameter of the adjustment handle 4321 to ensure the adjustment range of the cage 4320.

[0106] In one possible implementation, the main body of the cage 4320 is cylindrical; the side surfaces of the cylindrical structure of the cage 4320 are convex spherical surfaces, and the mounting holes are located on both end faces of the cylindrical structure of the cage 4320. The overall structure is relatively simple, effectively reducing production costs.

[0107] Furthermore, the cavity of the locking module 4310 is cylindrical; the cylindrical structure of the locking module 4310 has a concave spherical side, which matches the cylindrical structure of the retainer 4320.

[0108] Furthermore, a preset gap is provided between the end face of the cylindrical structure of the retainer 4320 and the inner wall of the cavity of the locking module 4310. By setting the gap, the retainer 4320 with cylindrical structure is provided with room to move within the cavity of the locking module 4310, so that the retainer 4320 can be rotated for angle adjustment.

[0109] In one possible implementation, the locking module 4310 includes a first locking shell 4311 and a second locking shell 4312; the first locking shell 4311 and the second locking shell 4312 are interlocked and detachably connected. The overall structure is relatively simple, effectively reducing production costs.

[0110] The first clearance hole 4313 is formed on the first locking shell 4311, and the second clearance hole is formed on the second locking shell 4312.

[0111] Furthermore, the first locking shell 4311 and the second locking shell 4312 are connected by bolts 4315, thereby controlling the clamping force of the first locking shell 4311 and the second locking shell 4312 on the retainer 4320 by tightening and loosening the bolts 4315, which facilitates the adjustment of the retainer 4320 and its stability after adjustment.

[0112] like Figure 1 As shown, the main body of the locking module 4310 has a cuboid structure. The first clearance hole 4313 is located in the middle of the end face of the cuboid structure of the locking module 4310. There are four bolts 4315 used to connect the first locking shell 4311 and the second locking shell 4312. The four bolts 4315 are located at the four corners of the end of the cuboid structure of the locking module 4310. The adjustment hole 4314 is located in the middle of the side of the cuboid structure of the locking module 4310.

[0113] In one possible implementation, the first locking housing 4311 and the second locking housing 4312 are connected by a spring screw. By setting the spring screw, in the default state, the first locking housing 4311 and the second locking housing 4312 press the retainer 4320 to keep it stable. When opposing forces are applied to the first locking housing 4311 and the second locking housing 4312 respectively, causing the spring screw to compress, the first locking housing 4311 and the second locking housing 4312 release their clamping on the retainer 4320, making it easier to rotate and adjust the angle of the retainer 4320.

[0114] In one possible implementation, the ultrasonic excitation module has at least two excitation transmission channels, each of which can be individually configured with ultrasonic transmission and reception modes and parameters. At least one excitation transmission channel is used for high-precision testing using the immersion method, i.e., this channel is equipped with one or two liquid immersion coupling probes with frequencies between 0.5 and 20 MHz; at least one excitation transmission channel is used for high-efficiency detection using the air coupling method, i.e., this channel is equipped with one or two air coupling probes with frequencies between 0.2 and 1 MHz.

[0115] like Figure 1 and Figure 2 As shown, the battery clamping module 6000 includes a mounting frame and a battery clamp; the mounting frame is connected to the drive end of the lifting module 7000; the battery clamp is slidably mounted on the mounting frame and is suitable for clamping the battery to be tested. The main body of the battery clamping module 6000 has a rectangular frame structure, and the lifting module 7000 consists of two or more linear electric cylinders.

[0116] Furthermore, the lifting module 7000 consists of two linear electric cylinders, which are located on opposite sides of the coupling fluid container 2000. The driving ends of the two linear electric cylinders are close to the opening of the coupling fluid container 2000, and the driving direction is consistent with the opening direction of the coupling fluid container 2000.

[0117] The mounting bracket has folded ears at both ends, with the two folded ears protruding from the mounting bracket. The main body of the folded ears is L-shaped, and the two ends of the folded ears are connected to the mounting bracket and the drive end of the linear electric cylinder, respectively.

[0118] Furthermore, the mounting frame is equipped with clamp guide rails 4112, which match the battery clamps, allowing the battery clamps to slide on the mounting frame. The main body of the mounting frame has a rectangular structure, with both ends of the rectangular structure facing the two linear electric cylinders. Two folded ears are located on the same long side of the rectangular structure, protruding towards both ends of the rectangular structure. Clamp guide rails 4112 are provided on both long sides of the rectangular structure. The mounting frame also has connecting columns located in the middle, with both ends connected to the two long sides of the rectangular structure. The connecting columns are arranged in parallel to improve the stability of the mounting frame.

[0119] Furthermore, the connecting column is also equipped with a clamp guide rail 4112, and those skilled in the art can set the specific arrangement of the clamp guide rail 4112 on the mounting frame according to the actual situation.

[0120] In one possible implementation, such as Figure 3 , Figure 4 and Figure 5 As shown, the battery clamp includes: a mounting base plate 6210, grippers 6220, and an adjusting slider 6230; one side of the mounting base plate 6210 is provided with an adjusting guide rail 4112 and a gripper 6220 slide rail, one end of the adjusting slide rail facing the middle of the gripper 6220 slide rail, and the adjusting slide rail and the gripper 6220 slide rail are arranged in a T-shape; the grippers 6220 are slidably mounted on the gripper 6220 slide rail, and there are two or more grippers 6220; the adjusting slider 6230 is slidably mounted on the adjusting slide rail, and the adjusting slider 6230 is provided with a connecting rod 6231, the connecting rod 6231... The two ends of the connecting rod 6230 are respectively hinged to the adjusting slider 6230 and the clamp 6220; there are two or more connecting rods 6231, and the two or more connecting rods 6231 are respectively hinged to two or more clamps 6220; the adjusting slider 6230 is also provided with a lug and a clamping screw. The lug and the adjusting guide rail 4112 are set on the same side of the mounting base. The adjusting screw passes through the lug and connects to the adjusting slider 6230. The clamping screw matches the lug. The clamping screw is suitable for applying pressure to the adjusting slider 6230. The direction of the applied pressure is along the adjusting guide rail away from the clamp 6220 guide rail.

[0121] By providing a T-shaped arrangement of adjusting slide rails and gripper slide rails 6212 on one side of the mounting base plate 6210, two grippers 6220 can slide along the length of the gripper slide rails 6212, and the adjusting slider 6230 can slide along the length of the adjusting slide rail. In use, the battery to be tested is positioned between the two grippers 6220, which clamp the battery. Figure 3As shown, the adjusting slider 6230 is connected to two grippers 6220 via two connecting rods 6231, with each end of the connecting rod 6231 hinged to the adjusting slider 6230 and the grippers 6220 respectively. When the adjusting slider 6230 slides towards the gripper slide rail 6212, it pushes the two connecting rods 6231, causing the two grippers 6220 to slide away from each other on the gripper slide rail 6212. When the adjusting slider 6230 slides away from the gripper slide rail 6212, it pulls the two connecting rods 6231, causing the two grippers 6220 to slide towards each other on the gripper slide rail 6212. This achieves the clamping and unloading of the battery to be tested and can accommodate batteries of different thicknesses. By incorporating a clamping mechanism, pressure is applied to the adjusting slider 6230. This pressure is transmitted to the two grippers 6220 via two connecting rods 6231, ensuring stable clamping by applying pressure to opposite sides of the battery under test. Compared to traditional battery clamping methods, which require the installation and removal of clamping components, this application achieves clamping and unloading of the battery under test simply by controlling the sliding of the adjusting slider 6230, making the operation much more convenient.

[0122] In one possible implementation, the clamping part includes a lug and an adjusting screw; the lug and the adjusting slide rail are located on the same side of the mounting base, and the adjusting screw passes through the lug and connects to the adjusting slider 6230, with the adjusting screw matching the lug. Pressure is then applied to the adjusting slider 6230 by controlling the rotation of the adjusting screw.

[0123] It should be noted that those skilled in the art can configure the lug, adjusting screw, and adjusting slider 6230 according to actual conditions or personal preferences. For example, the lug may be located at one end of the adjusting slide rail along its length, and the lug may have an internally threaded through-hole that matches the adjusting screw. The adjusting screw passes through the lug via the internally threaded through-hole, and one end of the adjusting screw is abutted or rotatably connected to the adjusting slider 6230. The other end of the adjusting screw is equipped with a clamping knob 6232, which is used to control the rotation of the adjusting screw. By rotating the adjusting screw, in cooperation with the internally threaded through-hole of the lug, the adjusting screw moves along its axis, thereby driving the adjusting slider 6230 to slide on the adjusting slide rail until the two grippers 6220 abut against the opposite sides of the battery to be tested. At this point, continuing to rotate the adjusting screw applies pressure to the adjusting slider 6230, thereby stabilizing the gripping of the battery to be tested by the two grippers 6220.

[0124] Preferred, such as Figure 4As shown, there are two lugs, which are located at both ends of the adjusting slide rail. The adjusting screw is rotatably connected to the two lugs, and the axis of the adjusting screw is in the same direction as the sliding direction of the adjusting slider 6230. The adjusting slider 6230 is provided with an internal threaded through hole, which matches the adjusting screw. The adjusting screw passes through the adjusting slider 6230 through the internal threaded through hole. One end of the adjusting screw is provided with a clamp knob 6232.

[0125] The adjusting screw is rotated only circumferentially by two lugs and cannot be displaced along its axis. The adjusting slider 6230 can only slide along the length of the adjusting slide rail by the adjusting slide rail. Thus, by rotating the adjusting screw by the clamp knob 6232, the adjusting slider 6230 slides along the axis of the adjusting screw, i.e., on the adjusting slide rail, in cooperation with the internal threaded through hole of the adjusting slider 6230.

[0126] Furthermore, such as Figure 4 As shown, one lug is located between the adjusting guide rail 4112 and the clamping guide rail 4112, and the adjusting screw has a clamping knob 6232, one end of which passes through the other lug.

[0127] In one possible implementation, the main body of the adjusting slider 6230 has a T-shaped structure, see [reference]. Figure 3 The bottom of the T-shaped structure of the adjusting slider 6230 is set towards the gripper slide rail 6212, and the two connecting rods 6231 are respectively hinged to the two ribs of the T-shaped structure of the adjusting slider 6230.

[0128] In one possible implementation, the main body of the gripper 6220 is cylindrical, with one end of the gripper 6220 slidably connected to the gripper slide rail 6212 along its length, so that the sides of the two grippers 6220 are arranged opposite each other for gripping the battery to be tested. The surface of the gripper 6220 is provided with an insulating layer to prevent short circuits of the tabs and protect the battery to be tested.

[0129] Furthermore, the maximum distance between the two grippers 6220 is less than or equal to the focusing depth of the adapted ultrasonic probe.

[0130] In one possible implementation, each of the two clamps is provided with a jaw mounting hole 6222 that matches the bolt 4315. By installing the bolt 4315, the clamping force of the two jaws 6220 on the battery to be tested can be further increased, thereby improving stability.

[0131] Furthermore, there are two or more gripper mounting holes 6222, which are arranged along the length of the gripper 6220.

[0132] In one possible implementation, there are two gripper slide rails 6212, which are parallel to each other in their length direction. The gripper 6220 is equipped with a guide rail 4112 slider, and the gripper 6220 is slidably connected to both gripper slide rails 6212 via the guide rail 4112 slider. The connecting rod 6231 is hinged to the guide rail 4112 slider. By setting two parallel gripper slide rails 6212, the connection stability of the gripper 6220 is improved.

[0133] In one possible implementation, a probe support plate 6214 is also included. The probe support plate 6214 and the adjusting slide rail are located on the same side of the mounting base plate 6210, and the probe support plate 6214 and the adjusting slide rail are located on opposite sides of the gripper slide rail 6212. The end of the probe support plate 6214 facing away from the gripper slide rail 6212 protrudes from the mounting base plate 6210. The probe support plate 6214 is suitable for supporting the battery to be tested.

[0134] It should be noted that when clamping the sheet-shaped pouch battery, the two grippers 6220 are used to clamp the edge seal or tabs of the pouch battery, and the side of the probe support plate 6214 facing away from the mounting base plate 6210 is used to support the end face of the pouch battery.

[0135] The probe support plate 6214 has a trapezoidal cross-section. The upper base of the trapezoid of the probe support plate 6214 is connected to the mounting base plate 6210, and the lower base of the trapezoid of the probe support plate 6214 is used to support the battery to be tested.

[0136] In one possible implementation, a clamp slider 6240 and a locking device 6250 are also included; both the clamp slider 6240 and the locking device 6250 are disposed on the same side of the mounting base plate 6210, the clamp slider 6240 matches the clamp guide rail 4112, and the locking device 6250 is suitable for locking the position on the clamp guide rail 4112. This is achieved by providing the clamp slider 6240 and the locking device 6250.

[0137] In one possible implementation, the locking device 6250 includes a locking lever and a compression spring 6253; the middle part of the locking lever is hinged to the mounting base plate 6210, and the two ends of the locking lever are a pressing end 6251 and a locking end 6252, respectively. The pressing end 6251 protrudes from the mounting base plate 6210, and the locking end 6252 is located in the middle of the mounting base plate 6210; the compression spring 6253 is disposed between the locking end 6252 of the locking lever and the mounting base plate 6210, and the side of the locking end 6252 facing away from the compression spring 6253 is provided with teeth, which match the adapted guide rail 4112.

[0138] See Figure 5The main body of the mounting base plate 6210 is plate-shaped, with the locking lever and gripper 6220 located on opposite sides of the mounting base plate 6210. The pressing end 6251 of the locking lever protrudes from the mounting base plate 6210 and bends towards the side where the gripper 6220 is located. The locking end 6252 of the locking lever is located in the middle of the mounting base plate 6210 and bends away from the mounting base plate 6210, leaving a gap between the locking end 6252 and the mounting base plate 6210 for installing the compression spring 6253. In the default state, the teeth of the locking end 6252 are pressed against the adapted guide rail 4112 by the compression spring 6253, engaging with the rack 6410 of the adapted guide rail 4112 to lock the position. When it is necessary to move the battery position, pressing the pressing end 6251 of the locking lever can compress the compression spring 6253, causing the teeth to disengage from the rack 6410 and slide the clamp slider 6240.

[0139] like Figure 5 As shown, the battery clamp is slidably mounted on the clamp guide rail 4112 via the clamp slider 6240. The clamp guide rail 4112 is provided with a rack 6410 that matches the teeth of the locking end 6252 of the locking lever.

[0140] Furthermore, those skilled in the art can specifically set the number of battery clamps on the mounting rail 4112 according to actual usage.

[0141] According to another aspect of this application, such as Figure 12 As shown, a battery testing method is provided, which tests the battery to be tested based on any of the above-mentioned devices, including: Step S100: Using the ultrasonic probe 5100 of the ultrasonic excitation module, an ultrasonic signal is emitted to the test surface of the battery to be tested in air or coupling fluid, and at least one of transmitted ultrasonic signal and reflected ultrasonic signal is received; Step S200: Using the scanning module 3000, the ultrasonic probe 5100 is driven to perform planar motion based on the test surface of the battery to be tested, and the position coordinates of the ultrasonic probe 5100 are obtained; Step S300: According to the position coordinates, at least one of the corresponding transmitted ultrasonic signal and reflected ultrasonic signal is stored in a pre-constructed test coordinate matrix, and the test result of the test surface of the battery to be tested is obtained according to the at least one of the transmitted ultrasonic signal and reflected ultrasonic signal stored in the test coordinate matrix.

[0142] This application is applicable to ultrasonic testing of batteries under test using either immersion or air coupling methods. By configuring a single or paired ultrasonic probe 5100, at least one of the reflection or transmission methods is used to test the battery. A scanning module 3000 performs a surface scan of the battery under test. During the surface scan, the encoder of the scanning module 3000 acquires position coordinates corresponding to at least one of the transmitted and reflected ultrasonic signals acquired by the ultrasonic probe 5100 at various positions on the surface, thereby constructing a detection coordinate matrix to characterize the surface features of the battery under test.

[0143] Furthermore, the ultrasonic excitation module is configured with at least three excitation transmission channels, each of which can be individually configured with ultrasonic transmission and reception modes and parameters. Each channel can be configured with two air-coupled / liquid-coupled probes. The liquid-coupled probes have frequencies between 0.5-20 MHz, and the air-coupled probes have frequencies between 0.2-1 MHz. The liquid-coupled probes are used for high-precision testing using the immersion method, while the air-coupled probes are used for high-efficiency testing using the air-coupled method. The ultrasonic probe 5100 includes at least one of narrowband, broadband, and composite probe types. The scanning module 3000 controls the displacement range of the probe clamp module, and the lifting module 7000 controls the battery under test, positioned in the battery clamping module 6000, to be immersed in or above the coupling liquid. This enables high-precision testing using the immersion method (where both the ultrasonic probe 5100 and the battery under test are located in the coupling liquid for ultrasonic testing) and high-efficiency testing using the air-coupled method (where both the ultrasonic probe 5100 and the battery under test are located in the air for ultrasonic testing).

[0144] Preferably, the ultrasonic excitation module is configured with three excitation emission channels. The two ultrasonic probes 5100 of the excitation emission channel 1 are located on opposite sides of the detection surface of the battery to be tested and perform transmission method detection. The ultrasonic probe 5100 of the excitation emission channel 2 performs reflection method detection on the front of the battery. The ultrasonic probe 5100 of the excitation emission channel 3 performs reflection method detection on the back of the battery.

[0145] The acquired transmitted and reflected ultrasound signals include information such as peak amplitude, frequency, time of flight (TOF), number of peaks, and waveform phase.

[0146] Based on the acquired transmitted and reflected ultrasonic signals, combined with the position coordinates, the acquired transmitted and reflected ultrasonic signals are filled into the pre-constructed detection coordinate matrix. According to the transmitted and reflected ultrasonic signals stored in the detection coordinate matrix, the detection results of the detection surface of the battery under test are obtained. The detection results include wetting state, venting state, gas generation state, edge sealing state, lithium plating state, electrolyte solidification state, in-situ cycling state, and structural defects.

[0147] In one possible implementation, the detection surface of the battery to be tested is imaged based on at least one of the acquired transmitted ultrasonic signal and reflected ultrasonic signal, and the position coordinates, and the detection result of the detection surface of the battery to be tested is obtained based on the image.

[0148] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A battery testing device, characterized in that, include: The system includes a frame platform, a coupling fluid container, a scanning module, a probe clamping module, an ultrasonic excitation module, a battery clamping module, and a lifting module. The coupling fluid container is located inside the frame platform, and an opening is provided on one side of the coupling fluid container. The internal cavity of the coupling fluid container is suitable for holding the coupling fluid. The scanning module is mounted on the frame platform, and the driving end of the scanning module is connected to the probe clamping module. The scanning module is suitable for driving the probe clamping module to perform planar motion. The ultrasonic excitation module is equipped with an ultrasonic probe, which is connected to the probe clamping module. The battery clamping module is suitable for mounting the battery to be tested. The battery clamping module is matched with the coupling liquid container. The battery clamping module is located at the opening of the coupling liquid container. The battery clamping module is connected to the drive end of the lifting module. The lifting module is mounted on the frame platform and is positioned close to the coupling fluid container. The lifting module is adapted to drive the battery clamping module into and out of the internal cavity of the coupling fluid container.

2. The battery testing device according to claim 1, characterized in that, The coupling fluid container includes: a container body, a flow rate regulating device, and a temperature control device; The container body has an opening on one side, and the side wall of the container body has a liquid inlet and a liquid outlet, which are arranged opposite to each other. The flow rate regulating device is disposed adjacent to the container body, and the inlet and outlet ends of the flow rate regulating device are respectively connected to the inlet and the outlet. The temperature control device is arranged adjacent to the flow rate regulating device, and the temperature control device is suitable for heating or cooling the coupling agent flowing through the flow rate regulating device. The container body is also equipped with a bubble elimination device, which covers the liquid inlet.

3. The battery testing device according to claim 2, characterized in that, The main body of the bubble elimination device is a shell structure; The bubble elimination device has an opening on one side and a through hole on the other side. There are two or more through holes. The bubble elimination device is located inside the cavity of the coupling agent tank. The opening side of the bubble elimination device is attached to the liquid inlet.

4. The battery testing device according to claim 1, characterized in that, The scanning module includes: a first servo slide rail and a second servo slide rail; The first servo slide rail is mounted on the frame platform, and the first servo slide rail and the second servo slide rail are arranged intersectingly; The second servo slide rail is mounted on the slider of the first servo slide rail, and the probe clamping module is mounted on the slider of the second servo slide rail.

5. The battery testing device according to claim 1, characterized in that, The probe clamping module includes: a spacing adjustment module, a mounting arm, and an angle adjustment module; The spacing adjustment module is connected to the drive end of the scanning module, and the spacing adjustment module is provided with a guide rail; One end of the mounting arm is slidably connected to the guide rail, and the other end of the mounting arm is connected to the angle adjustment module; The spacing adjustment module is also provided with a positioning device, which is connected to the spacing adjustment module and the mounting arm respectively. The positioning device is suitable for controlling the sliding position of the mounting arm. The angle adjustment module is connected to the ultrasonic probe.

6. The battery testing device according to claim 5, characterized in that, The positioning device includes a probe lead screw and an adjustment knob; The probe lead screw is rotatably connected to the spacing adjustment module, and the probe lead screw rotates along its axis. The axis of the probe lead screw is aligned with the orientation of the guide rail. The adjustment knob is located at one end of the probe lead screw; The mounting arm has an internal threaded hole that matches the probe lead screw, and the probe lead screw passes through the mounting arm via the internal threaded hole.

7. The battery testing device according to claim 5, characterized in that, The angle adjustment module includes: a locking housing and a retainer; The inner wall of the cavity of the locking shell is a concave spherical surface, and the locking shell is provided with a first clearance hole, which communicates with the cavity of the locking shell. The retainer is located inside the cavity of the locking shell, and the outer side wall of the retainer is a convex spherical surface, which matches the inner side wall of the cavity of the locking shell. The cage has mounting holes, and the ultrasonic probe is connected to the cage through the mounting holes, with the mounting holes facing the first clearance hole.

8. The battery testing device according to any one of claims 1 to 7, characterized in that, The battery clamping module includes a mounting bracket and a battery clamp; The mounting bracket is connected to the drive end of the lifting module; The battery clamp is slidably mounted on the mounting bracket and is suitable for holding the battery to be tested.

9. The battery testing device according to claim 8, characterized in that, The battery clamp includes: a mounting base plate, grippers, and an adjusting slider; One side of the mounting base plate is provided with an adjustment guide rail and a gripper guide rail. One end of the adjustment guide rail faces the middle of the gripper guide rail, and the adjustment guide rail and the gripper guide rail are arranged in a T-shape. The grippers are slidably mounted on the gripper slide rail, and there are two or more grippers. The adjusting slider is slidably mounted on the adjusting slide rail. The adjusting slider is provided with a connecting rod, and the two ends of the connecting rod are respectively hinged to the adjusting slider and the gripper. There are two or more connecting rods, and the two or more connecting rods are respectively hinged to two or more grippers; The adjusting slider is also provided with a lug and a clamping screw. The lug and the adjusting guide rail are located on the same side of the mounting base. The adjusting screw passes through the lug and is connected to the adjusting slider. The clamping screw matches the lug. The clamping screw is suitable for applying pressure to the adjusting slider. The direction of the applied pressure is along the adjusting guide rail away from the clamping guide rail.

10. A battery testing method, characterized in that, Testing the battery to be tested using the apparatus according to any one of claims 1 to 9 includes: Using the ultrasonic probe of the ultrasonic excitation module, an ultrasonic signal is emitted to the detection surface of the battery under test in air or coupling fluid, and at least one of transmitted ultrasonic signal and reflected ultrasonic signal is received. The ultrasonic probe is driven to perform planar motion based on the detection surface of the battery to be tested using a scanning module, and the position coordinates of the ultrasonic probe are obtained. Based on the position coordinates, at least one of the corresponding transmitted ultrasonic signal and the reflected ultrasonic signal is stored in a pre-constructed detection coordinate matrix. Based on at least one of the transmitted ultrasonic signal and the reflected ultrasonic signal stored in the detection coordinate matrix, the detection result of the detection surface of the battery to be tested is obtained.

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