Ultrasonic detection device and battery detection equipment

Abstract

The invention provides an ultrasonic detection device and battery detection equipment, and relates to the technical field of battery detection. The ultrasonic detection device is used for detecting the quality of a battery, and comprises a substrate which is provided with a mounting surface; the flexible wrapping piece is arranged on the mounting surface, the flexible wrapping piece and the substrate jointly define a sound wave conduction cavity used for being filled with a coupling agent, the mounting surface forms part of the cavity wall of the sound wave conduction cavity, and the flexible wrapping piece is configured to change along with the shape of the surface of the battery when the battery is attached to the flexible wrapping piece; and the ultrasonic probe is arranged on the mounting surface and is used for transmitting and receiving ultrasonic waves. According to the ultrasonic detection device, the coupling agent is injected into the sound wave conduction cavity, so that the flexible wrapping piece is completely attached to the surface of the battery, the battery detection precision is guaranteed, the coupling agent does not need to make direct contact with the surface of the battery, the battery can be kept clean, and the detection cost can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery detection, and in particular to an ultrasonic detection device and a battery detection equipment. Background Art

[0002] During the battery production process, if there are bubbles or vacuum in the internal electrolyte, it will seriously affect the performance, life and safety of the battery. The commonly used battery detection method is to use ultrasonic detection, that is, to use an ultrasonic probe to contact the battery, and fill the gap with a coupling medium such as ultrasonic glue in the middle, or to place the ultrasonic probe and the battery in liquid (water) to achieve detection.

[0003] However, this method has problems of complex operation and product contamination. In addition, due to the large number of battery types, a single testing device is difficult to adapt to the testing needs of batteries of different structural types, resulting in low testing efficiency and high testing costs. Summary of the invention

[0004] The present application provides an ultrasonic detection device and a battery detection equipment, which are used to solve the problems in the prior art of coupling medium contaminating the battery and high detection cost when performing ultrasonic detection.

[0005] On the one hand, the present application provides an ultrasonic detection device for detecting battery quality, comprising:

[0006] a substrate having a mounting surface;

[0007] A flexible wrapping member, which is disposed on the mounting surface and defines, together with the substrate, a sound wave conduction cavity for filling the coupling agent, the mounting surface constituting a part of the cavity wall of the sound wave conduction cavity, and the flexible wrapping member is configured to change with the shape of the battery surface when the battery is attached;

[0008] The ultrasonic probe is arranged on the mounting surface and is used for transmitting and receiving ultrasonic waves.

[0009] In a possible implementation, the ultrasonic detection device provided by the present application includes a plurality of ultrasonic probes arranged at intervals, and the plurality of ultrasonic probes are arranged in an array on the mounting surface.

[0010] In one possible implementation, in the ultrasonic detection device provided by the present application, the ultrasonic probe is fixedly disposed on the mounting surface.

[0011] In one possible implementation, in the ultrasonic detection device provided by the present application, the ultrasonic probe is movably disposed on the mounting surface.

[0012] In a possible implementation, the ultrasonic detection device provided in the present application has a slide rail on the mounting surface, and the ultrasonic probe can be slidably disposed on the slide rail.

[0013] In a possible implementation, the ultrasonic detection device provided by the present application includes a plurality of ultrasonic probes arranged at intervals, and a plurality of slide rails corresponding one to one with the ultrasonic probes.

[0014] In a possible implementation, in the ultrasonic detection device provided by the present application, the slide rail includes at least one first extension section, the first extension section extends along a first direction, and the plurality of slide rails are arranged at intervals along a second direction.

[0015] In one possible implementation, in the ultrasonic detection device provided by the present application, each slide rail includes a plurality of first extension sections arranged at intervals along a second direction, and the slide rail also includes a second extension section connected between two adjacent first extension sections, and the two second extension sections connected to the same first extension section are respectively located at both ends of the corresponding first extension section.

[0016] In one possible implementation, in the ultrasonic detection device provided in the present application, the cross-sectional shape of the substrate is one of a straight line and an arc.

[0017] In one possible implementation, in the ultrasonic detection device provided by the present application, a working surface is provided at one end of the ultrasonic probe away from the mounting surface, and the working surface is one of a flat surface, a concave surface, and a convex surface.

[0018] In one possible implementation, the ultrasonic detection device provided in the present application has a liquid inlet and a liquid outlet on a substrate that are connected to the sound wave conduction cavity, and the sound wave conduction cavity is suitable for circulating communication with a liquid supply device that provides a coupling agent through the liquid inlet and the liquid outlet.

[0019] In one possible implementation, in the ultrasonic detection device provided by the present application, the flexible wrapping member is detachably connected to the substrate.

[0020] In one possible implementation, the ultrasonic detection device provided by the present application,

[0021] The thickness of the flexible wrapping piece ranges from 1 mm to 3 mm; and / or,

[0022] The distance between two adjacent ultrasonic probes ranges from 1 mm to 20 mm; and / or,

[0023] The diameter of the ultrasonic probe ranges from 3 mm to 20 mm; and / or,

[0024] The detection distance of the ultrasonic probe ranges from 2mm to 200mm.

[0025] In one possible implementation, the ultrasonic detection device provided by the present application,

[0026] The substrate is a metal part; and / or,

[0027] The flexible wrapping member is at least one of a latex member and a resin member; and / or,

[0028] The coupling agent is at least one of water and silicone oil.

[0029] On the other hand, the present application provides a battery testing device, comprising:

[0030] Mounting bracket;

[0031] A clamp is movably arranged on the mounting bracket, and the number of the clamps is multiple;

[0032] Any of the above-mentioned ultrasonic detection devices corresponds to the fixture and is arranged on the corresponding fixture. Multiple ultrasonic detection devices jointly enclose a detection space, and the detection space is used to accommodate the battery to be tested. In addition, the flexible wrapping parts of the multiple ultrasonic detection devices jointly cover the battery surface.

[0033] In a possible implementation, the battery testing device provided in the present application has a guide rail on the mounting bracket, and the clamp is movably disposed on the guide rail.

[0034] In one possible implementation, the battery testing device provided in the present application further includes: a liquid supply device, which is in circular communication with the sound wave conduction cavity of the ultrasonic testing device to provide a coupling agent to the sound wave conduction cavity.

[0035] The ultrasonic detection device and battery detection equipment provided by the present application, the ultrasonic detection device is provided with a substrate, a flexible wrapping member and an ultrasonic probe, the ultrasonic probe includes a plurality of ultrasonic probes, which are used to transmit and receive ultrasonic waves to detect the internal structure of the battery, the ultrasonic probe is fixed on the mounting surface of the substrate, the flexible wrapping member is arranged on the mounting surface, and together with the mounting surface, a closable sound wave conduction cavity is formed, the ultrasonic probe is located in the sound wave conduction cavity, and the sound wave conduction cavity is used to fill the coupling agent. When the battery needs to be tested, the battery is placed near the flexible wrapping member, and then the filling coupling agent is injected into the sound wave conduction cavity so that the shape of the flexible wrapping member matches the shape of the battery surface, so that the flexible wrapping member is completely fitted with the battery surface, and the detection can be started. In this way, when performing ultrasonic testing, the filling coupling agent is injected into the sound wave conduction cavity, so that the shape of the flexible wrapping member changes until it is completely fitted with the battery surface, and the gap between the ultrasonic probe and the battery surface is filled by the coupling agent, ensuring the accuracy of the ultrasonic detection device detection, and avoiding direct contact between the coupling agent and the battery surface, which is conducive to keeping the battery surface clean and reducing the detection cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] Figure 1 A schematic diagram of the structure of an ultrasonic detection device provided in an embodiment of the present application;

[0038] Figure 2 for Figure 1 Schematic diagram of the structure of the middle base plate;

[0039] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0040] Figure 4 for Figure 1 Another structural schematic diagram of the middle base plate;

[0041] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0042] Figure 6 for Figure 1 Another structural schematic diagram of the middle base plate;

[0043] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0044] Figure 8 for Figure 1 Another structural schematic diagram of the middle base plate;

[0045] Fig. 9 for Figure 8 A partial enlarged view of point D in the middle;

[0046] Fig.10 for Figure 2 Schematic diagram of the structure of the ultrasonic probe;

[0047] Fig.11 for Figure 1 The diagram of the use status of the ultrasonic testing device in the battery testing equipment;

[0048] Fig.12 A schematic structural diagram of an ultrasonic detection device according to another embodiment of the present application;

[0049] Fig.13 for Fig.12 Schematic diagram of the structure of the middle base plate;

[0050] Fig.14 for Fig.13 A partial enlarged view of point E in the middle;

[0051] Fig.15 for Fig.12 Another structural schematic diagram of the middle base plate;

[0052] Fig.16 for Fig.15 A partial enlarged view of point F in the middle;

[0053] Fig.17 for Fig.12 The diagram of the use status of the ultrasonic testing device in the battery testing equipment;

[0054] Fig.18 This is a schematic structural diagram of an ultrasonic detection device according to another embodiment of the present application;

[0055] Fig.19 for Fig.18 Schematic diagram of the structure of the middle base plate;

[0056] Fig. 20 for Fig.19 GG section view;

[0057] Fig.21 for Fig.19 HH sectional view;

[0058] Fig. 22 for Fig.18 Diagram of the ultrasonic detection device in use in battery testing equipment.

[0059] Description of reference numerals:

[0060] 100-ultrasonic detection device;

[0061] 110-substrate; 111-mounting surface; 112-slide rail; 1121-first extension section; 1122-second extension section; 113-liquid inlet; 114-liquid outlet;

[0062] 120-flexible wrapping piece;

[0063] 130-ultrasonic probe; 131-working surface;

[0064] 10-battery testing equipment; 11-mounting bracket; 12-guide rail; 13-clamp;

[0065] 1-Battery. DETAILED DESCRIPTION

[0066] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0067] As mentioned in the background technology: during the battery production process, if there are bubbles or vacuum in the internal electrolyte, it will seriously affect the performance, life and safety of the battery. The commonly used battery detection method is to use ultrasonic detection, that is, to use an ultrasonic probe to contact the battery, and use a coupling medium such as ultrasonic glue to fill the gap in the middle or place the ultrasonic probe and the battery in a liquid (water) to achieve detection. However, this method has the problems of complex operation and product pollution. In addition, due to the large number of battery types, a single detection device is difficult to adapt to the detection needs of batteries of different structural types, resulting in low detection efficiency and high detection costs.

[0068] In view of the above technical problems, the embodiment of the present application provides an ultrasonic detection device and a battery detection device. The ultrasonic detection device includes a substrate, a flexible wrapping member and an ultrasonic probe. The ultrasonic probe includes multiple ones for transmitting and receiving ultrasonic waves to detect the internal structure of the battery. The ultrasonic probe is fixed on the mounting surface of the substrate. The flexible wrapping member is arranged on the mounting surface and together with the mounting surface, forms a closable sound wave conduction cavity. The ultrasonic probe is located in the sound wave conduction cavity, and the sound wave conduction cavity is used to fill the coupling agent. When the battery needs to be tested, the battery is placed near the flexible wrapping member, and then the filling coupling agent is injected into the sound wave conduction cavity so that the shape of the flexible wrapping member matches the shape of the battery surface, so that the flexible wrapping member is completely fitted with the battery surface, and the detection can be started. In this way, when performing ultrasonic testing, the filling coupling agent is injected into the sound wave conduction cavity, so that the shape of the flexible wrapping member changes until it is completely fitted with the battery surface. The gap between the ultrasonic probe and the battery surface is filled by the coupling agent to ensure the accuracy of the ultrasonic detection device detection, and the coupling agent can be prevented from directly contacting the battery surface, which is conducive to keeping the battery surface clean and reducing the detection cost.

[0069] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings:

[0070] It should be noted that the ultrasonic detection device provided in the embodiment of the present application can be applied to various different battery detection equipment.

[0071] See also Figure 1 , Figure 2 and Fig.11As shown, the ultrasonic detection device 100 of the embodiment of the present application is used to detect the quality of the battery 1, and includes: a substrate 110, a flexible wrapping member 120 and an ultrasonic probe 130. The substrate 110 has a mounting surface 111, and the mounting surface 111 can be one side surface of the substrate 110 along the thickness direction. The mounting surface 111 can be circular, square, elliptical or other shapes; the mounting surface can be a plane or a curved surface; the mounting surface 111 can be a continuous surface or a surface with a hollow structure.

[0072] The flexible wrapping member 120 is arranged on the mounting surface 111, and together with the substrate 110, defines a sound wave conduction cavity, the sound wave conduction cavity can be filled with a coupling agent, the mounting surface 111 constitutes a partial cavity wall of the sound wave conduction cavity, and the flexible wrapping member 120 is constructed to change with the surface shape of the battery 1 when the battery 1 is attached; the ultrasonic probe 130 can be arranged on the mounting surface 111, and the ultrasonic probe 130 is a plurality of ultrasonic probes 130 arranged at intervals, and the ultrasonic probe 130 is used to transmit and receive ultrasonic waves.

[0073] For example, the edge of the flexible wrapper 120 can be connected to the edge of the mounting surface 111 of the substrate 110, or a structure for fixing and clamping the edge of the flexible wrapper 120 can be provided on the mounting surface 11, so that a sound wave conduction cavity is formed between the flexible wrapper 120 and the mounting surface 111. At this time, the mounting surface 111 constitutes part of the cavity wall of the sound wave conduction cavity, and at the same time, the ultrasonic probe 130 provided on the mounting surface 111 is in the sound wave conduction cavity, and the coupling agent immerses the ultrasonic probe, so that the ultrasonic wave emitted by the ultrasonic probe 130 to the battery 1 and the ultrasonic wave reflected by the battery 1 can be conducted through the coupling agent, thereby reducing the energy loss of the ultrasonic wave, which is conducive to improving the accuracy of the detection result. Moreover, since the coupling agent is inside the sound wave conduction cavity, it can avoid the coupling agent from contacting the battery 1, reduce the risk of contamination of the battery 1 product, and realize the reuse of the coupling agent.

[0074] In the embodiment of the present application, the ultrasonic detection device 100 includes a substrate 110, a flexible wrapping member 120 and an ultrasonic probe 130. The ultrasonic probe 130 may be one or more, preferably more than one. Each ultrasonic probe 130 may be used to transmit and receive ultrasonic waves to detect the internal structure of the battery 1, or a part of the ultrasonic probe 130 is used to transmit ultrasonic waves, and another part of the ultrasonic probe 130 is used to receive ultrasonic waves. The ultrasonic probe 130 is fixed on the mounting surface 111 of the substrate 110, the flexible wrapping member 120 is arranged on the mounting surface 111, and together with the mounting surface 111, a closable sound wave conduction cavity is formed, the ultrasonic probe 130 is located in the sound wave conduction cavity, and the sound wave conduction cavity is used to fill the coupling agent. The shape of the flexible wrapping member 120 can be changed at will, which is conducive to better fitting with the surface of the battery 1 to be detected, and can adapt to various types of batteries, thereby reducing the detection cost. At the same time, the distance between the ultrasonic probe 130 and the surface of the battery 1 can be adjusted by changing the amount of coupling agent filled in the sound wave conduction cavity, so that the battery 1 is located within the optimal detection range of the ultrasonic probe 130 to improve the accuracy of ultrasonic detection. In addition, the coupling agent can squeeze the flexible wrapping piece 120 to fit the surface of the battery 1 during the filling process, and can also better dissipate heat for the ultrasonic probe 130.

[0075] Among them, the specific method of adjusting the distance between the ultrasonic probe 130 and the surface of the battery 1 by changing the amount of coupling agent filled in the sound wave conduction cavity is not limited in the embodiment of the present application. For example, after the flexible wrapping member 120 is bonded to the surface of the battery 1, the position of the substrate 110 can be adjusted by increasing or decreasing the injection amount of the coupling agent, thereby adjusting the position of the ultrasonic probe 130, so that the distance between the surface of the battery 1 and the ultrasonic probe 130 is maintained within the optimal detection range; or, the ultrasonic probe 130 and the surface of the battery 1 can be adjusted to a certain distance in advance, and after ensuring that the battery 1 is within the appropriate detection range, a certain amount of coupling agent is injected into the sound wave conduction cavity until the flexible wrapping member 120 is completely bonded to the surface of the battery 1, thereby ensuring that the battery 1 is within the optimal detection range of the ultrasonic probe 130. The operation is simpler and is conducive to improving the detection efficiency.

[0076] When the battery 1 needs to be inspected, at least two ultrasonic inspection devices 100 are required. The battery 1 is placed between the flexible wrapping members 120 of the two ultrasonic inspection devices 100 so that the flexible wrapping member 120 contacts the surface of the battery 1. Then, a coupling agent is injected into the sound wave conduction cavity so that the shape of the flexible wrapping member 120 changes according to the shape of the surface of the battery 1. This allows the flexible wrapping member 120 to completely fit the surface of the battery 1 and then the inspection can begin.

[0077] In this way, when the quality of the battery 1 is detected by the ultrasonic detection device 100, the filling coupling agent is injected into the sound wave conduction cavity, so that the shape of the flexible wrapping member 120 changes until it is completely fitted with the surface of the battery 1. The coupling agent fills the gap between the ultrasonic probe 130 and the surface of the battery 1, thereby reducing the loss of ultrasonic signal transmission and ensuring the accuracy of the detection of the ultrasonic detection device 100. It can also avoid direct contact between the coupling agent and the surface of the battery 1, which is beneficial to keeping the surface of the battery 1 clean.

[0078] The specific arrangement of the ultrasonic probe 130 on the mounting surface 111 is not limited in the embodiment of the present application, and it is sufficient to fully detect the internal structure of the battery 1. For example, when the mounting surface 111 is circular, the ultrasonic probe 130 can be arranged in a divergent manner outward from the center of the circle, such as Fig.12 and Fig.13 As shown, when the mounting surface 111 is rectangular, the ultrasonic probes 130 can be arranged in an array, such as Figure 1 and Figure 2 shown.

[0079] In addition, in the ultrasonic detection device 100 of the embodiment of the present application, the shape of the flexible wrapping member 120 can be changed according to the shape of the battery 1 to be tested and the injection amount of the coupling agent. Therefore, the same ultrasonic detection device can be used to detect batteries 1 of various shapes. In the prior art, the ultrasonic probe 130 is made to directly contact the outer surface of the battery 1, and the layout of the probe needs to be adjusted according to the shape of the battery 1. Therefore, the ultrasonic detection device 100 of the embodiment of the present application is conducive to expanding the application range of the ultrasonic detection device and reducing the detection cost.

[0080] In some possible implementations, see Figure 1 , Figure 2 , Figure 3 and Fig.11 As shown, there are a plurality of ultrasonic probes 130 arranged at intervals, and the plurality of ultrasonic probes 130 in the embodiment of the present application are arranged in an array on the mounting surface 111 .

[0081] It is understandable that the substrate 110 is rectangular, and the ultrasonic probes 130 are arranged in an array on the mounting surface 111. The corresponding ultrasonic probes 130 can be selected and enabled according to the shape of the battery 1, which is conducive to ensuring that the ultrasonic probes 130 on the ultrasonic detection device 100 can cover batteries 1 of various shapes, thereby improving the applicability of the ultrasonic detection device 100. Of course, the ultrasonic probes 130 can also be in the form of a circular array, annular array or other arrays, and the substrate 110 can also be circular, annular or other shapes.

[0082] The specific number and number of rows and columns of the ultrasonic probes 130 are not limited in the embodiment of the present application and can be adjusted according to the size of the substrate 110 and the applicable scenario.

[0083] In some possible implementations, see Figure 1 and Figure 2 As shown, the ultrasonic probe 130 of the embodiment of the present application is fixedly disposed on the mounting surface 111 .

[0084] In some embodiments, the ultrasonic probe 130 is fixed to the mounting surface 111 by means of fasteners such as screws, which helps to improve the stability of the ultrasonic probe 130 .

[0085] In some possible implementations, see Figure 1 , Figures 3 to 9 , Fig.11 , Fig.15 , Fig.16 and Fig.21 As shown, the ultrasonic probe 130 of the embodiment of the present application is movably disposed on the mounting surface 111 .

[0086] In some embodiments, the ultrasonic probe 130 is configured to be movable relative to the mounting surface 111, so that the layout of the ultrasonic probe 130 on the mounting surface 111 can be changed according to the shape of the battery 1 to be detected. In this way, the position of the ultrasonic probe 130 can be matched with the shape of the battery 1 without arranging the ultrasonic probe 130 in an array, which is conducive to reducing the number of ultrasonic probes 130 used and reducing costs.

[0087] In some possible implementations, see Figure 1 , Figures 3 to 9 , Fig.11 , Fig.15 , Fig.16 and Fig.21 As shown, a slide rail 112 is provided on the mounting surface 111 of the embodiment of the present application, and the ultrasonic probe 130 can be slidably disposed on the slide rail 112. The slide rail 112 can be straight, curved, or broken, and the shape of the slide rail 112 is not limited in this embodiment.

[0088] In a specific implementation, a plurality of slide rails 112 are provided on the mounting surface 111, and the ultrasonic probe 130 is slidably connected to the corresponding slide rails 112. The ultrasonic probe 130 changes its layout on the mounting surface 111 by sliding along the slide rails 112, thereby adapting to different shapes of the battery 1. At the same time, the ultrasonic probe 130 can also slide along the slide rails 112 during the detection process, thereby increasing the detectable range of an ultrasonic probe 130, thereby reducing the use of the ultrasonic probe 130 and saving the cost of ultrasonic detection. Optionally, a slide table can be configured for each ultrasonic probe 130, and the slide table can move along the slide rails 112, and the ultrasonic probe 130 is fixed to the slide table.

[0089] The shape and direction of the slide rail 112 are not limited in the embodiment of the present application. For example, the slide rail 112 is a plurality of concentric rings, such as Fig.15 As shown, or the slide rail 112 is a plurality of parallel strip slide rails 112, such as Figure 4 shown.

[0090] In some possible implementations, see Figure 1 , Figures 3 to 9 , Fig.11 , Fig.15 , Fig.16 and Fig.21 As shown, the slide rails 112 of the embodiment of the present application are multiple and correspond one to one with the ultrasonic probes 130. Of course, in other embodiments, two, three or more ultrasonic probes 130 may correspond to and share one slide rail 112, and the slide rail 112 may cover as much area on the installation surface as possible.

[0091] Furthermore, a plurality of slide rails 112 are provided, and the ultrasonic probes 130 correspond to the slide rails 112 one by one, so that each ultrasonic probe 130 can move relative to the mounting surface 111 , which is beneficial to improving the flexibility of the layout of the ultrasonic probes 130 .

[0092] In some possible implementations, see Figure 1 , Figure 3 , Figure 4 , Figure 5 and Fig.11 As shown, the slide rail 112 of the embodiment of the present application includes at least one first extension section 1121, the first extension section 1121 extends along the first direction, and the plurality of slide rails 112 are arranged at intervals along the second direction. It can be understood that when there is only one first extension section 1121, the slide rail 112 is linear.

[0093] It should be noted that Figure 2 The Y direction is the first direction, the X direction is the second direction, at least one ultrasonic probe 130 is arranged on each slide rail 112, and the ultrasonic probe 130 on each slide rail 112 can slide independently along the first direction, so that a variety of ultrasonic probes 130 can be arranged. While being applicable to batteries 1 of more shapes, the number of ultrasonic probes 130 used is reduced, which is beneficial to saving detection costs.

[0094] In some possible implementations, see Figure 1 , Figures 6 to 9 and Fig.11As shown, each slide rail 112 of the embodiment of the present application includes a plurality of first extension sections 1121 arranged at intervals along the second direction, and the slide rail 112 also includes a second extension section 1122 connected between two adjacent first extension sections 1121, and the two second extension sections 1122 connected to the same first extension section 1121 are respectively located at both ends of the corresponding first extension section 1121.

[0095] In some embodiments, the slide rail 112 includes a first extension section 1121 and a second extension section 1122, and the first extension section 1121 and the second extension section 1122 are arranged alternately. Multiple first extension sections 1121 and second extension sections 1122 are interconnected, and two second extension sections 1122 connected to the same first extension section 1121 are respectively located at both ends of the first extension section 1121, so that the slide rail 112 can be S-shaped, U-shaped or other shapes. In this way, an ultrasonic probe 130 can not only move in the first direction, but also enter another first extension section 1121 of the same slide rail 112 through the second extension section 1122, thereby expanding the movable range of an ultrasonic probe 130, helping to increase the detectable area of ​​an ultrasonic probe 130, thereby further reducing the number of ultrasonic probes used and saving detection costs.

[0096] In some possible implementations, see Figure 1 , Fig.11 , Fig.18 and Fig.21 As shown, the cross-sectional shape of the substrate 110 in the embodiment of the present application is one of a straight line shape and an arc shape.

[0097] In specific implementation, the cross-sectional shape of the substrate 110 can be selected in different shapes according to the shape of the battery 1 to be detected, and the embodiment of the present application does not limit this. Figure 1 and Fig.12 The substrate 110 shown in the figure has a straight cross-sectional shape, which has a larger coverage area and can ensure that the outer surface of the battery 1 is completely covered. Fig.18 The substrate 110 is shown as having an arc-shaped cross section, and its sound wave conducting cavity is cylindrical, which is easier to shape and is conducive to wrapping the entire outer surface of the battery 1.

[0098] In some possible implementations, see Figure 1 , Figure 2 , Fig.10 and Fig.11 As shown, the ultrasonic probe 130 of the embodiment of the present application is provided with a working surface 131 at one end away from the mounting surface 111, and the working surface 131 is one of a plane, a concave surface and a convex surface. The ultrasonic probe with a plane working surface 131 is a planar probe, the ultrasonic probe with a concave working surface 131 is a focusing probe, and the ultrasonic probe with a convex working surface 131 is a divergent probe.

[0099] Understandably, Fig.10 From left to right in the figure, there are three types of ultrasonic probes 130 with working surfaces 131 of concave, convex and flat. The shapes of the working surfaces 131 of the ultrasonic probes 130 are different, and the effects they can achieve are also different. Different types of ultrasonic probes 130 can be selected on the same ultrasonic detection device 100, and they are combined according to different detection requirements. The specific combination method is not limited in the embodiments of the present application. For example, when the detection accuracy requirement is not high, all ultrasonic probes 130 with working surfaces 131 of flat surfaces can be selected; when the detection accuracy requirement is high, all ultrasonic probes 130 with working surfaces 131 of concave surfaces can be selected; or, ultrasonic probes 130 with working surfaces 131 of flat surfaces, concave surfaces and convex surfaces can be used in combination to improve the detection efficiency. The ultrasonic probe 130 with a concave working surface 131 can be used to detect the key focus area, and the ultrasonic probe 130 with a convex working surface 131 can be used to improve the receiving effect of the ultrasonic signal.

[0100] In some possible implementations, see Figure 1 , Figure 2 , Fig.11 , Fig.17 and Fig. 22 As shown, the substrate 110 of the embodiment of the present application is provided with a liquid inlet 113 and a liquid outlet 114 connected to the sound wave conduction cavity, and the sound wave conduction cavity is suitable for circulating communication with a liquid supply device for providing coupling agent through the liquid inlet 113 and the liquid outlet 114.

[0101] Furthermore, a liquid inlet 113 and a liquid outlet 114 are provided on the substrate 110, and a proper amount of coupling agent is injected into the sound wave conduction cavity through the liquid inlet 113 to adjust the shape of the sound wave conduction cavity, and the coupling agent is discharged through the liquid outlet 114. In addition, the liquid inlet 113 and the liquid outlet 114 are cyclically connected with a liquid supply device for providing the coupling agent, so that during the detection process, the coupling agent in the sound wave conduction cavity always flows at a certain flow rate, which can cool the ultrasonic probe 130 while ensuring that the flexible wrapping member 120 is in contact with the surface of the battery 1, which is beneficial to keep the ultrasonic probe 130 within a certain temperature range, improve the working stability of the ultrasonic probe 130, and meet the needs of long-term use of the ultrasonic detection device 100.

[0102] In a specific implementation, since the optimal detection ranges of ultrasonic probes 130 of different models are different, the injection amount of the coupling agent can be adjusted through the liquid inlet 113 and the liquid outlet 114 to adjust the distance between the ultrasonic probe 130 and the battery 1. For example, when the flexible wrapping member 120 is completely in contact with the surface of the battery 1, the flow rate of the coupling agent injected through the liquid inlet 113 can be increased, and the flow rate of the coupling agent discharged through the liquid outlet 114 can be reduced to increase the volume of the coupling agent in the sound wave conduction cavity, thereby increasing the distance between the ultrasonic probe 130 and the surface of the battery 1. Alternatively, the flow rate of the coupling agent discharged through the liquid outlet 114 can be increased, and the flow rate of the coupling agent injected through the liquid inlet 113 can be reduced to reduce the volume of the coupling agent in the sound wave conduction cavity, thereby reducing the distance between the ultrasonic probe 130 and the surface of the battery 1, so that the distance between the surface of the battery 1 and the ultrasonic probe 130 is maintained within the detection range of the ultrasonic probe 130, which is beneficial to further improve the detection accuracy of the ultrasonic detection device 100.

[0103] In some possible implementations, see Figure 1 and Fig.11 As shown, the flexible wrapping member 120 of the embodiment of the present application is detachably connected to the substrate 110 .

[0104] It is understandable that, since the flexible wrapping member 120 needs to contact the surface of the battery 1, long-term detection may cause the flexible wrapping member 120 to wear, so the flexible wrapping member 120 is set to be detachably connected to the substrate 110, and when the flexible wrapping member 120 is excessively worn, a new flexible wrapping member 120 can be replaced at any time. At the same time, when the ultrasonic probe 130 is damaged, the quick flexible wrapping member 120 can also be removed to repair the ultrasonic probe 130, which is conducive to improving the maintenance efficiency of the ultrasonic detection device 100.

[0105] In some possible implementations, see Figures 1 to 22 As shown, the thickness of the flexible wrapping piece 120 of the embodiment of the present application ranges from 1mm to 3mm; and / or, the spacing between two adjacent ultrasonic probes 130 ranges from 1mm to 20mm; and / or, the diameter of the ultrasonic probe 130 ranges from 3mm to 20mm; and / or, the detection distance of the ultrasonic probe 130 ranges from 2mm to 200mm.

[0106] In some embodiments, the thickness of the flexible wrapping member 120 is in the range of 1mm-3mm, which not only ensures that the flexible wrapping member 120 has a certain thickness and is not easy to be damaged, but also helps to avoid the flexible wrapping member 120 being too thick to affect the accuracy of the detection of the ultrasonic probe 130. A certain distance needs to be maintained between the ultrasonic probes 130, which is to ensure that there is no interference between the two ultrasonic probes 130 and to ensure that the detection range of the ultrasonic probe 130 can cover all areas to be detected. Therefore, the distance between two adjacent ultrasonic probes 130 is set to 1mm-20mm. The diameter of the ultrasonic probe 130 is in the range of 3mm-20mm to achieve a better detection effect. The detection distance of the ultrasonic probe 130, that is, the distance between the ultrasonic probe 130 and the surface of the battery 1, is in the range of 2mm-200mm, which is determined according to the specific properties of the ultrasonic probe 130, and is not limited in the embodiment of the present application. In specific implementation, the distance between the ultrasonic probe 130 and the surface of the battery 1 can be adjusted by changing the amount of coupling agent injected into the sound wave conduction cavity. In addition, when the acoustic wave conduction cavity is filled with coupling agent, the distance between the ultrasonic probe 130 and the flexible wrapping member 120 can be set to be greater than or equal to 5 mm to prevent the ultrasonic probe 130 from being damaged by collision when the ultrasonic detection device contacts the surface of the battery 1.

[0107] In some possible implementations, see Figure 1 As shown, the substrate 110 of the embodiment of the present application is a metal part; and / or the flexible wrapping part 120 is at least one of a latex part and a resin part; and / or the coupling agent is at least one of water and silicone oil.

[0108] Specifically, the flexible wrapping member 120 uses at least one of a latex member and a resin member, both of which have the characteristics of corrosion resistance, easy molding, and stable structure, meeting the use requirements of the flexible wrapping member 120. The coupling agent can be at least one of water or silicone oil, both of which are non-corrosive liquids, which help avoid damage to the flexible wrapping member 120.

[0109] For example, see Figures 1 to 11 As shown, in this embodiment, the ultrasonic detection device 100 is a rectangular structure with an outer dimension of 1000mm×200mm×70mm. It is suitable for detecting all square hard shell or soft package batteries 1 with a size within 950mm×150mm×50mm, and the detected electrolyte can be liquid or solid. The material used for the flexible wrapping 120 is latex material, which has a certain elasticity. The ultrasonic probe 130 uses a transducer with a diameter of 14mm and a frequency of 5MHz. The ultrasonic signal at this size and frequency has been tested and has good effects in terms of energy concentration and the size of the concentration area (such as Figure 3), which is suitable for detecting the electrolyte density inside the battery 1.

[0110] See also Figure 2 and Figure 3 As shown, when the ultrasonic probes 130 are arranged in an array on the mounting surface 111, the distance h1 between two adjacent ultrasonic probes 130 arranged along the first direction is 20 mm, and the distance w1 between two adjacent ultrasonic probes 130 arranged along the second direction is 20 mm. A total of 96 ultrasonic probes 130 are evenly installed in 4×24 pieces inside the entire ultrasonic detection device 100. When the battery 1 is clamped, the distance between the ultrasonic probe 130 and the battery 1 is 20 mm.

[0111] Alternatively, see Figure 4 and Figure 5 As shown, a plurality of slide rails 112 spaced apart along the second direction are provided on the mounting surface 111, and each slide rail 112 corresponds to an ultrasonic probe 130. At this time, the number of ultrasonic probes 130 is 24, and the spacing W1 between two adjacent slide rails 112 is 24 mm. The width d1 of the first extension section 1121 of the slide rail 112 along the second direction is 16 mm. At this time, the diameter of the selected ultrasonic probe 130 is still 14 mm, and the spacing between the battery 1 and the ultrasonic probe 130 continues to be maintained at 20 mm.

[0112] Alternatively, see Figure 6 and Figure 7 As shown, the slide rail 112 is U-shaped, and each slide rail 112 includes two first extension sections 1121 and one second extension section 1122, which can further reduce the number of ultrasonic probes 130 and save costs. At this time, the width of the first extension section 1121 along the second direction and the width d2 of the second extension section 1122 along the first direction are both 16 mm, the diameter of the ultrasonic probe 130 remains 14 mm, the number of ultrasonic probes 130 is reduced to 12, and the spacing W2 between adjacent U-shaped guide rails 12 between ultrasonic probes 130 along the second direction is correspondingly increased to 64 mm. The width of the ultrasonic probe 130 is 16 mm, and the distance D1 between two adjacent first extension sections 1121 of the same guide rail 12 along the second direction is 24 mm.

[0113] Alternatively, see Figure 8 and Fig. 9As shown, the guide rail 112 is S-shaped, and each guide rail 112 includes three first extension sections 1121 and two second extension sections 1122. The number of ultrasonic probes 130 used is reduced to only 9. At this time, the spacing W3 between adjacent S-shaped guide rails 12 along the second direction is 95 mm, the width of the first extension section 1121 along the second direction and the width d3 of the second extension section 1122 along the first direction are both 12 mm, the ultrasonic probe 130 uses a model with a diameter of 13 mm, and the distance D2 between two adjacent first extension sections 1121 of the same guide rail 12 along the second direction is 40 mm.

[0114] See also Figure 1 , Fig.11 , Fig.17 and Fig.21 As shown, an embodiment of the present application further provides a battery detection device 10, comprising: a mounting bracket 11; a clamp 13, movably disposed on the mounting bracket 11, wherein the clamp 13 is multiple; any one of the above-mentioned ultrasonic detection devices 100, wherein the ultrasonic detection device 100 corresponds to the clamp 13 and is disposed on the corresponding clamp 13, wherein the multiple ultrasonic detection devices 100 jointly enclose a detection space, wherein the detection space is used to accommodate a battery 1 to be inspected, and wherein the flexible wrapping members 120 of the multiple ultrasonic detection devices 100 jointly cover the surface of the battery 1.

[0115] The structure and working principle of the ultrasonic detection device 100 are described in detail in the above embodiments, and will not be described in detail here.

[0116] In the embodiment of the present application, the battery detection device 10 includes a mounting bracket 11, a fixture 13 and a plurality of any of the above-mentioned ultrasonic detection devices 100. The substrate 110 of the ultrasonic device is connected to the fixture 13 to mount the ultrasonic device on the mounting bracket 11. The fixture 13 moves relative to the mounting bracket 11 to adjust the position between each ultrasonic detection device 100, and then adjust the size of the detection space to match the detection space with the battery 1. Then, a coupling agent is injected into the sound wave conduction cavity of each ultrasonic detection device 100, so that the flexible wrapping members 120 of the plurality of ultrasonic detection devices 100 wrap the surface of the battery 1 together, and the detection begins. Among them, the fixture 13 and the substrate 110 can be connected by bolts, and the specific connection method is not limited in the embodiment of the present application.

[0117] In some possible implementations, see Figure 1 , Fig.11 , Fig.17 and Fig.21 As shown, a guide rail 12 is disposed on the mounting bracket 11 of the embodiment of the present application, and a clamp 13 is movably disposed on the guide rail 12 .

[0118] It is understandable that the guide rail 12 is provided on the mounting bracket 11 , and the clamp 13 is slidably connected to the guide rail 12 . The guide rail 12 can limit the sliding path of the clamp 13 , which is beneficial to ensure the stability of the connection between the clamp 13 and the mounting bracket 11 .

[0119] In some possible implementations, see Figure 1 , Fig.11 , Fig.17 and Fig.21 As shown, the embodiment of the present application further includes: a liquid supply device, which is cyclically connected to the sound wave conduction cavity of the ultrasonic detection device 100 to provide coupling agent to the sound wave conduction cavity.

[0120] In a specific implementation, the battery detection device 10 also includes a liquid supply device, which is connected to the sound wave conduction cavity, so that the coupling agent circulates between the liquid supply device and the sound wave conduction cavity, thereby keeping the ultrasonic probe 130 of the ultrasonic detection device 100 within a certain temperature range, which is beneficial to ensuring the working stability of the ultrasonic probe 130.

[0121] In another embodiment, see Figures 12 to 17 As shown in the figure, the square shell battery 1 involved in the figure has an outer size of 148mm×105mm×53mm. In order to ensure that the ultrasonic detection device 100 can better fit the surface of the battery 1, its structure has been adjusted. The substrate 110 adopts a disc-shaped structure, and is still composed of a circular substrate 110, a corresponding flexible cavity wrapping member and an ultrasonic probe 130. Among them, the ultrasonic probe 130 is installed on the mounting surface 111 by screws, and the substrate 110 is fixed to the clamp 13 by bolts. The diameter of the substrate 110 is 375mm, and the total thickness after the sound wave conduction cavity is filled is 170mm. The substrate 110 also retains a liquid inlet 113 and a liquid outlet 114. When working, first, the sound wave conduction cavity is filled with 80% of the volume, and the battery 1 is clamped inward. At this time, the distance between the battery 1 and the ultrasonic probe 130 is 10mm, the clamp 13 stops moving, and the liquid inlet 113 begins to fill the coupling agent until the flexible wrapping member 120 is completely and tightly fitted to the battery 1. At this time, the ultrasonic probe 130 starts to work, detects the acoustic signal of the battery 1, and makes a judgment.

[0122] The internal structure of the ultrasonic detection device 100 is improved according to the circular structure of the substrate 110. First, a smaller ultrasonic probe 130 with a diameter of 10 mm is used. The distance between the battery 1 and its ultrasonic probe 130 is shortened to 10 mm. There are also two schemes for the arrangement of the ultrasonic probe 130. The first scheme is to minimize the detection time. Fig.13 and Fig.14As shown. From the inside to the outside, the probe spacing w2 of each group is 30mm, with a total of six layers of rings, and the number of each layer is 1, 8, 16, 24, 30, and 48, respectively. The corresponding angle θ1 between the ultrasonic probes 130 of each layer is: 360° / number of ultrasonic probes 130 per layer. The phased array composed of a total of 127 ultrasonic probes 130 can accurately detect internal defects of battery 1. Solution 2 can reduce the number of ultrasonic probes 130 used, but it will also increase the detection time accordingly, such as Fig.15 and Fig.16 It consists of 6 ultrasonic probes 130. Except for the ultrasonic probe 130 in the central area which remains stationary, the other 5 can move in a circular manner along the movable guide rail 12 arranged around the center of the circle, replacing the multiple groups of ultrasonic probes 130 arranged on the original path. The minimum distance between two adjacent ultrasonic probes 130, that is, the distance W4 between adjacent annular guide grooves, is also maintained at 30 mm, and the guide groove width d4 is 16 mm.

[0123] In yet another embodiment, see Figures 18 to 22 As shown, when the battery 1 to be tested is a cylindrical battery 1, the size of the cylindrical battery 1 is 50mm in diameter and 88mm in length. In order to adapt to the problem of large curvature of the contact surface of the cylindrical battery 1, the ultrasonic detection device 100 is designed as a semi-cylindrical structure to ensure that it can better fit the outer surface of the battery 1 when clamping the battery 1. The size of the structure is 200mm in height and 50mm in diameter. The internal structure can also be designed as an array arrangement, such as Fig.19 and Fig. 20 As shown, the angle θ2 between two adjacent rows of ultrasonic probes 130 in the semicircular part along the center of the circle is 60°, and there are 3 rows, a total of 15 rows, with 5 ultrasonic probes 130 in each row. The distance between the ultrasonic probes 130 along the radial spacing h2 is 20mm, and the diameter of the ultrasonic probe 130 is selected to be 13mm. At this time, the distance between the ultrasonic probe 130 and the battery 1 should be 15mm to ensure that the battery 1 is in the energy concentration area. Alternatively, see Fig.21 As shown, linear guide rails 12 are arranged in the radial direction, and the angle between the guide rails 12 is maintained at 60°, the same as the matrix arrangement, to achieve the same detection effect, and the width d5 ​​of the guide rails 12 is 14 mm.

[0124] In summary, the ultrasonic detection device 100 and the battery detection equipment 10 provided in the embodiment of the present application, the battery detection equipment 10 includes a liquid supply device, a mounting bracket 11, a plurality of clamps 13 and a plurality of ultrasonic detection devices 100, the ultrasonic detection device 100 slidably cooperates with the mounting bracket 11 through the clamp 13, the ultrasonic detection device 100 includes a substrate 110, a flexible wrapping member 120 and an ultrasonic probe 130, the flexible wrapping member 120 and the substrate 110 together form a sound wave conduction cavity, and the ultrasonic probe 130 is arranged on the mounting surface 111 of the substrate 110 and is located in the sound wave conduction cavity.

[0125] When it is necessary to perform ultrasonic testing on the battery 1, the specific testing steps are as follows: the first step is to select an ultrasonic testing device 100 of appropriate size according to the shape of the battery 1 to be tested, and ensure that the flexible wrapping piece 120 can completely cover the surface of the battery 1; the second step is to fix the ultrasonic testing device 100 on the corresponding fixture 13; the third step is to connect the sound wave conduction cavity with the liquid supply device, and inject a certain coupling agent into the sound wave conduction cavity to support the sound wave conduction cavity; the fourth step is to place the battery 1 in the detection space; the fifth step is to move the fixture 13 so that the distance between the ultrasonic probe 130 and the surface of the battery 1 reaches a suitable detection distance; the sixth step is to continue to inject the coupling agent until the flexible wrapping piece 120 is completely in contact with the surface of the battery 1, and multiple ultrasonic testing devices 100 clamp the battery 1 together; the seventh step is for the ultrasonic probe 130 to emit an ultrasonic signal to start detection. Alternatively, the fifth step may be replaced by moving the clamp 13 until the flexible wrapping member 120 is completely in contact with the surface of the battery 1 and the plurality of ultrasonic detection devices 100 clamp the battery together, and the sixth step may be replaced by increasing or decreasing the amount of coupling agent injected so that the distance between the ultrasonic probe 130 and the surface of the battery 1 reaches a suitable detection distance. The remaining steps remain unchanged, and the preparations before the detection of the battery 1 can also be completed.

[0126] The test results are analyzed. When it is detected that the ultrasonic signal emitted by the ultrasonic probe 130 located on one side of the battery 1 is received by the ultrasonic probe 130 located on the other side opposite to the battery, and the energy of the received signal is approximately equal to the energy of the transmitted signal, it proves that the internal structure of the battery 1 is intact; when part of the emitted ultrasonic signal is received by the ultrasonic probe 130 located on the other side opposite to the battery 1, and part of it is received by the ultrasonic probe 130 that originally emitted the signal, it proves that part of the ultrasonic signal is reflected inside the battery 1, that is, there are bubbles inside the battery 1 and need to be dealt with in time; when the emitted ultrasonic signal is received by the ultrasonic probe 130 that originally emitted the signal, and the energy of the received signal is approximately equal to the energy of the transmitted signal, it proves that the ultrasonic signal is totally reflected, that is, there is a vacuum area inside the battery 1 and liquid injection needs to continue.

[0127] Therefore, the ultrasonic detection device 100 and the battery detection equipment 10 of the embodiment of the present application can quickly perform a comprehensive detection of the internal structure of the battery 1. The coupling agent can be used to fill the gap between the ultrasonic probe 130 and the surface of the battery 1 to ensure the accuracy of the detection, and the surface of the battery 1 does not need to directly contact the coupling agent to keep the surface of the battery 1 clean. After the detection is completed, the battery 1 can be directly taken out without cleaning, which is beneficial to improving the efficiency of battery 1 detection.

[0128] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0129] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0130] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0131] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0132] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is just a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0133] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0134] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0135] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0136] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An ultrasonic testing device (100) for testing the quality of a battery (1), characterized in that: include: A substrate (110) having a mounting surface (111); a flexible wrapping member (120), the flexible wrapping member (120) being arranged on the mounting surface (111) and defining together with the substrate (110) a sound wave conduction cavity for filling a coupling agent, the mounting surface (111) constituting a part of the cavity wall of the sound wave conduction cavity, and the flexible wrapping member (120) being configured to change with the surface shape of the battery (1) when attached to the battery (1); An ultrasonic probe (130) is arranged on the mounting surface (111), and the ultrasonic probe (130) is used to transmit and receive ultrasonic waves.

2. The ultrasonic detection device (100) according to claim 1, characterized in that: The ultrasonic probes (130) are multiple and arranged at intervals, and the multiple ultrasonic probes (130) are arranged in an array on the mounting surface (111).

3. The ultrasonic detection device (100) according to claim 1, characterized in that: The ultrasonic probe (130) is fixedly arranged on the mounting surface (111).

4. The ultrasonic detection device (100) according to claim 1, characterized in that: The ultrasonic probe (130) is movably arranged on the mounting surface (111).

5. The ultrasonic detection device (100) according to claim 4, characterized in that: A slide rail (112) is provided on the mounting surface (111), and the ultrasonic probe (130) can be slidably arranged on the slide rail (112).

6. The ultrasonic detection device (100) according to claim 5, characterized in that: The ultrasonic probes (130) are multiple and arranged at intervals, and the slide rails (112) are multiple and correspond one to one with the ultrasonic probes (130).

7. The ultrasonic detection device (100) according to claim 6, characterized in that: The slide rail (112) comprises at least one first extension section (1121), the first extension section (1121) extends along a first direction, and a plurality of the slide rails (112) are arranged at intervals along a second direction.

8. The ultrasonic detection device (100) according to claim 7, characterized in that: Each of the slide rails (112) comprises a plurality of first extension sections (1121) arranged at intervals along a second direction, and the slide rail (112) further comprises a second extension section (1122) connected between two adjacent first extension sections (1121), and two second extension sections (1122) connected to the same first extension section (1121) are respectively located at two ends of the corresponding first extension section (1121).

9. The ultrasonic detection device (100) according to any one of claims 1 to 8, characterized in that: The cross-sectional shape of the substrate (110) is one of a straight line shape and an arc shape.

10. The ultrasonic detection device (100) according to any one of claims 1 to 8, characterized in that: An end of the ultrasonic probe (130) away from the mounting surface (111) is provided with a working surface (131), and the working surface (131) is one of a flat surface, a concave surface and a convex surface.

11. The ultrasonic detection device (100) according to any one of claims 1 to 8, characterized in that: The substrate (110) is provided with a liquid inlet (113) and a liquid outlet (114) which are in communication with the sound wave conduction cavity. The sound wave conduction cavity is suitable for being cyclically connected with a liquid supply device for providing a coupling agent through the liquid inlet (113) and the liquid outlet (114).

12. The ultrasonic detection device (100) according to any one of claims 1 to 8, characterized in that: The flexible wrapping member (120) is detachably connected to the base plate (110).

13. The ultrasonic detection device (100) according to any one of claims 1 to 8, characterized in that: The thickness of the flexible wrapping member (120) ranges from 1 mm to 3 mm; and / or, The distance between two adjacent ultrasonic probes (130) ranges from 1 mm to 20 mm; and / or, The diameter of the ultrasonic probe (130) ranges from 3 mm to 20 mm; and / or, The detection distance of the ultrasonic probe (130) has a value range of 2 mm to 200 mm.

14. The ultrasonic detection device (100) according to any one of claims 1 to 8, characterized in that: The substrate (110) is a metal part; and / or, The flexible wrapping member (120) is at least one of a latex member and a resin member; and / or, The coupling agent is at least one of water and silicone oil.

15. A battery testing device (10), characterized in that: include: Mounting bracket (11); A clamp (13) is movably arranged on the mounting bracket (11), and there are a plurality of clamps (13); The ultrasonic detection device (100) described in any one of claims 1 to 14, wherein the ultrasonic detection device (100) corresponds to the fixture (13) and is arranged on the corresponding fixture (13), and a plurality of the ultrasonic detection devices (100) jointly enclose a detection space, and the detection space is used to accommodate a battery (1) to be tested, and the flexible wrapping members (120) of the plurality of the ultrasonic detection devices (100) jointly cover the surface of the battery (1).

16. The battery testing device (10) according to claim 15, characterized in that: A guide rail (12) is provided on the mounting bracket (11), and the clamp (13) is movably arranged on the guide rail (12).

17. The battery testing device (10) according to claim 15, characterized in that: Also includes: A liquid supply device is cyclically connected to the sound wave conduction cavity of the ultrasonic detection device (100) to provide coupling agent to the sound wave conduction cavity.

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