Battery detection device

Abstract

The application relates to the battery detection technical field and discloses a battery detection device which comprises a rotating platform, a detection assembly and an angle encoder. The rotating platform can rotate along the circumference thereof. The detection assembly is arranged on the rotating platform and is suitable for acquiring internal structure information of a product. The angle encoder is suitable for acquiring rotating angle information of the rotating platform. The angle encoder comprises an inner ring and an outer ring. The outer ring is arranged on the outer side of the inner ring and is rotationally connected with the inner ring. One of the outer ring and the inner ring is connected with the rotating platform, and the circumference of the other one is relatively fixed. The rotating axis of the inner ring and the outer ring of the angle encoder coincides with the rotating axis of the rotating platform. The application can reduce the single scanning time, improve the detection efficiency and reduce the radiation dose.

Description

Technical Field

[0001] This application relates to the field of battery testing technology, specifically to a battery testing device. Background Technology

[0002] With the rapid development of the electric vehicle industry, the market demand for power batteries has experienced exponential growth. While pursuing increased production capacity, battery safety and reliability have become core concerns, driving the demand for efficient and accurate non-destructive testing. Industrial computed tomography (CT) technology, due to its ability to non-destructively acquire three-dimensional structural information of the battery's internal structure, has become the mainstream testing method for evaluating key indicators such as battery electrode alignment, welding quality, and foreign object defects. The accuracy and efficiency of this technology directly affect the quality control level and production cycle of battery products.

[0003] Currently, most mainstream industrial CT scanners employ a semi-closed-loop control system to achieve sample stage rotation positioning. In this system, the drive mechanism (such as a servo motor) receives angle commands and executes the rotational action. Its feedback signal typically originates from an encoder at the motor end or an intermediate link in the transmission chain (such as the reducer output shaft). The system controls the rotation angle by monitoring these indirect position signals, rather than directly measuring the actual physical position of the CT turntable carrying the sample (i.e., the final actuator). This control mode relies on the absolute accuracy of the mechanical transmission chain and the assumption of zero backfault error.

[0004] In existing technologies, inherent gaps (backlash), elastic deformation, and wear in the mechanical transmission chain can cause deviations between the motor-end feedback and the actual angle of the turntable. Furthermore, the system cannot detect or compensate for this end-positioning error, resulting in inaccurate angle acquisition of the projected image. Therefore, to compensate for the impact of angle deviation on reconstruction accuracy, existing technologies acquire a large number of redundant angle projection images, far exceeding the theoretically necessary number, for data fitting and correction. This not only significantly prolongs the single scan time and reduces detection efficiency but also leads to a significant increase in the X-ray radiation dose to the equipment. Utility Model Content

[0005] This application provides a battery detection device to solve the problems of long scanning time, low detection efficiency, and high radiation dose.

[0006] In a first aspect, this application provides a battery testing device, comprising: The rotating platform can rotate circumferentially. The detection component, mounted on a rotating platform, is suitable for acquiring information about the internal structure of the product. An angle encoder is adapted to acquire the rotation angle information of the rotating platform. The angle encoder includes an inner ring and an outer ring. The outer ring is sleeved on the outside of the inner ring and is rotatably connected to the inner ring. One of the outer ring and the inner ring is connected to the rotating platform, and the other is relatively fixed in the circumferential direction. The rotation axes of the inner and outer rings of the angle encoder coincide with the rotation axis of the rotating platform.

[0007] Beneficial effects: By directly measuring the real-time rotation angle of the rotating platform using an angle encoder, a fully closed-loop control system is formed, completely eliminating end-positioning errors caused by backlash, elastic deformation, and wear in the mechanical transmission chain. This design ensures that the acquisition angle of CT projection images accurately matches the theoretical value, significantly improving the accuracy of 3D reconstruction, while reducing the number of redundant projection images, increasing single-scan efficiency, and reducing X-ray radiation dose. The inner and outer rings of the angle encoder are coaxially mounted on the rotating platform, ensuring that the angle feedback is completely aligned with the physical rotation axis of the rotating platform, further eliminating measurement deviations.

[0008] In one alternative implementation, it further includes: A fixed platform is connected to one of the inner and outer rings, which is relatively fixed in the circumferential direction; A rotating component is disposed between the fixed platform and the rotating platform, and the rotating platform is rotatably engaged with the fixed platform through the rotating component.

[0009] Beneficial effects: The fixed platform provides a stable reference surface for the angle encoder, avoiding interference with measurement accuracy from vibration or load changes; the rotating component carries the rotating platform and transmits torque, and its high rigidity structure can resist the off-center load torque during CT scanning, ensuring the smooth rotation of the platform and enabling the angle encoder to output reliable data even under complex working conditions.

[0010] In one alternative embodiment, the rotating member includes: The inner ring is connected to the fixed platform; An outer ring is connected to the rotating platform and is fitted around the outer side of the inner ring; A rolling element is disposed between the outer ring and the inner ring, and the outer ring and the inner ring are rotatably engaged by the rolling element.

[0011] Beneficial effects: The rotating components are designed as a slewing bearing structure, combining high load-bearing capacity with micron-level rotational accuracy. The rolling elements are evenly distributed, dispersing radial / axial loads and reducing positioning drift caused by friction. The outer ring meshing teeth are directly coupled to the gear drive, eliminating the intermediate transmission chain and avoiding backlash issues at the source. This structure improves the overall circumferential stiffness of the rotating platform, enhances its anti-tipping ability, and ensures motion stability during the scanning of large-size battery packs.

[0012] In one alternative implementation, it further includes: The driver component is equipped with a driver end; The gear is connected to the driving end of the driving member, and meshing teeth are provided on the circumferential surface of the outer ring along the outer ring. The gear meshes with the meshing teeth.

[0013] Beneficial effects: The direct drive mode through the meshing teeth of the gear and the outer ring, combined with the high response characteristics of the servo motor, improves the response speed and rotation accuracy of the rotating platform.

[0014] In one alternative implementation, it further includes: Base; The frame includes a first end and a second end, the first end of the frame is connected to the base, and the fixing platform is disposed on the frame on a side of the frame perpendicular to the direction from the first end to the second end of the frame.

[0015] Beneficial effects: The rigid structure of the base and frame suppresses the transmission of ground vibrations. The lateral mounting of the fixed platform on the frame keeps the system's center of gravity close to the center of the base, reducing swaying caused by the eccentric rotation of the rotating platform and ensuring that the angle encoder maintains measurement stability even under high-speed rotation. This makes it suitable for testing large-mass samples such as vehicle power batteries.

[0016] In one optional embodiment, the driving member is disposed at the second end of the frame, the second end of the frame is provided with a first notch, the end of the fixed platform near the second end of the frame is provided with a second notch, the first notch and the second notch are interconnected, and the driving member is disposed within the first notch and the second notch.

[0017] Beneficial effects: The connection between the first notch at the second end of the frame and the second notch of the fixed platform creates embedded installation space for the drive component, shortening the lever arm length from the motor output shaft to the gear. This structure reduces transmission torsional vibration, increases system bandwidth, and simultaneously prevents the drive component from protruding outwards, reducing the overall footprint of the equipment.

[0018] In one alternative implementation, it further includes: A mounting plate is disposed within the second notch, the mounting plate being connected to the fixed platform and the driving component.

[0019] Beneficial effects: The mounting plate forms a localized reinforced structure within the second notch, and the drive component is locked to the fixed platform by screws at both ends, thus solving the problem of weak rigidity in the notch area.

[0020] In one alternative embodiment, the rotating platform includes a first surface and a second surface opposite to each other, the first surface of the rotating platform being connected to the detection component, and the second surface of the rotating platform being connected to the outer ring.

[0021] Beneficial effects: The dual-sided design of the rotating platform clearly defines functional zones: the first side integrates the load of the detection components, while the second side is directly connected to the outer ring of the slewing bearing. This layout ensures that the gravity axis of the detection components coincides with the bearing center of the slewing bearing, eliminating additional bending moments.

[0022] In one optional implementation, the detection component includes: The detector and the transmitter are both located on the rotating platform away from the top. The detector and the transmitter are symmetrically arranged, and the plane of symmetry of the detector and the transmitter coincides with the rotation axis of the rotating platform.

[0023] Beneficial effect: The detector and emission source are arranged symmetrically with the axis of the rotating platform as the plane, ensuring that the X-ray beam always penetrates the center of the sample perpendicularly.

[0024] In one optional embodiment, the rotating platform is provided with a first through hole, and the fixed platform is provided with a second through hole, wherein the axis of the first through hole and the axis of the second through hole both coincide with the rotation axis of the rotating platform.

[0025] Beneficial effects: The coaxial through-hole design of the rotating platform and the fixed platform forms a through-channel for cables. All electrical wiring is routed centrally through the through-hole, preventing tangling as the platform rotates. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a battery detection device according to an embodiment of this application; Figure 2 This is a side view of a battery detection device according to an embodiment of this application; Figure 3 for Figure 2 Cross-sectional view of AA in the middle; Figure 4 for Figure 3 A magnified view of part B in the diagram; Figure 5 for Figure 3 A magnified view of part C in the diagram.

[0028] Explanation of reference numerals in the attached figures: 1. Rotating platform; 101. First through hole; 102. Cylinder; 2. Angle encoder; 201. Inner ring; 202. Outer ring; 3. Fixed platform; 301. Second through hole; 4. Rotating component; 401. Inner ring; 402. Outer ring; 403. Rolling element; 5. Driving component; 6. Gear; 7. Base; 8. Frame; 9. Mounting plate; 10. Detector; 11. Transmitter. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The following is combined with Figures 1 to 5 This describes an embodiment of the present application.

[0031] According to an embodiment of this application, a battery testing device is provided, including a rotating platform 1, a testing component, and an angle encoder 2. The rotating platform 1 is rotatable circumferentially. The testing component is disposed on the rotating platform 1 and is adapted to acquire internal structural information of the product. The angle encoder 2 is adapted to acquire rotation angle information of the rotating platform 1. The angle encoder 2 includes an inner ring 201 and an outer ring 202, the outer ring 202 being sleeved outside the inner ring 201 and rotatably connected to the inner ring 201. One of the outer ring 202 and the inner ring 201 is connected to the rotating platform 1, while the other is circumferentially fixed. The rotation axes of the inner ring 201 and the outer ring 202 of the angle encoder 2 coincide with the rotation axis of the rotating platform 1.

[0032] It should be noted that the inner ring 201 and outer ring 202 of the angle encoder 2 generally refer to two core components in the mechanical structure of a rotary encoder. They work together to measure the rotation angle or position. The inner ring 201 is the rotating part. It is directly or indirectly fixed to the rotating shaft being measured and rotates with the shaft. The outer ring 202 is the stationary part. It is fixed to the base, bracket, or housing of the machine and does not rotate with the shaft. In this application, the inner ring 201 is used to connect with the rotating platform 1, thereby realizing the rotation of the rotating platform 1, driving the detection component to rotate, and detecting the battery.

[0033] In this embodiment, the real-time rotation angle of the rotating platform 1 is directly measured by the angle encoder 2, forming a fully closed-loop control system that completely eliminates end-positioning errors caused by backlash, elastic deformation, and wear in the mechanical transmission chain. This design ensures that the acquisition angle of the CT projection image accurately matches the theoretical value, significantly improving the accuracy of 3D reconstruction, while reducing the number of redundant projection images, increasing single-scan efficiency, and reducing X-ray radiation dose. The inner ring 201 and outer ring 202 of the angle encoder 2 are coaxially mounted on the rotating platform 1, ensuring that the angle feedback is completely coincident with the physical rotation axis of the rotating platform 1, further eliminating measurement deviations.

[0034] In one embodiment, the system further includes a fixed platform 3 and a rotating component 4. The fixed platform 3 is connected to one of the inner ring 201 and the outer ring 202, which is circumferentially fixed. The rotating component 4 is disposed between the fixed platform 3 and the rotating platform 1, and the rotating platform 1 is rotatably engaged with the fixed platform 3 through the rotating component 4.

[0035] Optionally, the fixed platform 3 can be connected to the outer ring 202 of the angle encoder 2, thereby achieving circumferential fixation of the outer ring 202.

[0036] Optionally, the fixed platform 3 can be configured as a marble platform.

[0037] In this embodiment, the fixed platform 3 provides a stable reference surface for the angle encoder 2, avoiding interference with measurement accuracy from vibration or load changes; the rotating component 4 carries the rotating platform 1 and transmits torque, and its high rigidity structure can resist the off-center load torque during CT equipment scanning, ensuring the smooth rotation of the platform, so that the angle encoder 2 can still output reliable data under complex working conditions.

[0038] In one embodiment, the rotating component 4 includes an inner ring 401, an outer ring 402, and a rolling element 403. The inner ring 401 is connected to the fixed platform 3. The outer ring 402 is connected to the rotating platform 1 and is sleeved on the outside of the inner ring 401. The rolling element 403 is disposed between the outer ring 402 and the inner ring 401, and the outer ring 402 and the inner ring 401 are rotatably engaged by the rolling element 403.

[0039] It should be noted that the rotating component 4 is specifically configured as a slewing bearing, which is a commonly used structural component in the field. Its inner ring 401 is connected to the fixed platform 3 by fasteners, and its outer ring 402 is connected to the rotating platform 1 by fasteners.

[0040] Optionally, the inner ring 401 is connected to the rotating platform 1 by fasteners, and the outer ring 402 is connected to the fixed platform 3 by fasteners.

[0041] In this embodiment, the rotating component 4 is configured as a slewing bearing structure, combining high load-bearing capacity with micron-level rotational accuracy. The rolling elements 403 are evenly distributed, dispersing radial / axial loads and reducing positioning drift caused by friction. The outer ring 402's meshing teeth are directly coupled to the gear 6, eliminating the need for an intermediate transmission chain and avoiding backlash issues at the source. This structure improves the overall circumferential stiffness of the rotating platform 1, enhances its anti-tipping ability, and ensures motion stability during the scanning of large-size battery packs.

[0042] In one embodiment, the device further includes a drive member 5 and a gear 6. The drive member 5 is provided with a drive end. The gear 6 is connected to the drive end of the drive member 5 and has meshing teeth on the circumferential surface of the outer ring 402 along the outer ring 402. The gear 6 meshes with the meshing teeth.

[0043] Optionally, the drive unit 5 can be configured as a geared motor or a servo motor.

[0044] In this embodiment, the gear 6 and the outer ring 402 mesh with each other to achieve a direct drive mode, which, combined with the high response characteristics of the servo motor, improves the response speed and rotation accuracy of the rotating platform 1.

[0045] In one embodiment, the system further includes a base 7 and a frame 8. The frame 8 includes a first end and a second end, the first end of which is connected to the base 7. A fixing platform 3 is disposed on the frame 8 and is disposed on a side of the frame 8 perpendicular to the direction from the first end to the second end of the frame 8.

[0046] In this embodiment, the rigid structure of the base 7 and the frame 8 can suppress the transmission of ground vibration. The frame 8 is laterally mounted with the fixed platform 3, so that the center of gravity of the system is close to the center of the base 7, reducing the shaking caused by the eccentric rotation of the rotating platform 1, and ensuring that the angle encoder 2 maintains measurement stability under high-speed rotation, which is suitable for the detection of large mass samples such as vehicle power batteries.

[0047] In one embodiment, the driving member 5 is disposed at the second end of the frame 8, the second end of the frame 8 is provided with a first notch, the end of the fixed platform 3 near the second end of the frame 8 is provided with a second notch, the first notch and the second notch are interconnected, and the driving member 5 is disposed within the first notch and the second notch.

[0048] In this embodiment, the connection between the first notch at the second end of the frame 8 and the second notch of the fixed platform 3 creates an embedded installation space for the drive component 5, shortening the lever arm length from the motor output shaft to the gear 6. This structure reduces transmission torsional vibration, increases system bandwidth, and simultaneously prevents the drive component 5 from protruding outward, reducing the overall footprint of the equipment.

[0049] In one embodiment, a mounting plate 9 is further included, disposed within the second notch, the mounting plate 9 being connected to the fixed platform 3 and the driving component 5.

[0050] In this embodiment, the mounting plate 9 forms a local reinforcement structure within the second notch, and the drive member 5 is locked to the fixed platform 3 by screws at both ends, thus solving the problem of weak rigidity in the notch area.

[0051] In one embodiment, the rotating platform 1 includes a first surface and a second surface opposite to each other. The first surface of the rotating platform 1 is connected to the detection component, and the second surface of the rotating platform 1 is connected to the outer ring 402.

[0052] In this embodiment, the rotating platform 1 features a double-sided design with clearly defined functional zones: the first side integrates the load of the detection component, and the second side is directly connected to the outer ring 402 of the slewing bearing. This layout ensures that the gravity axis of the detection component coincides with the bearing center of the slewing bearing, eliminating additional bending moments.

[0053] In one embodiment, the detection component includes a detector 10 and an emission source 11, both of which are disposed on the rotating platform 1 away from the top. The detector 10 and the emission source 11 are symmetrically arranged, and the plane of symmetry of the detector 10 and the emission source 11 coincides with the rotation axis of the rotating platform 1.

[0054] It should be noted that detector 10 and emission source 11 are commonly used structural components in the field of industrial CT battery inspection. Emission source 11 is an X-ray source, and detector 10 is a flat panel detector 10.

[0055] In this embodiment, the detector 10 and the emission source 11 are arranged symmetrically with the axis of the rotating platform 1 as the plane of symmetry, ensuring that the X-ray beam always penetrates the center of the sample perpendicularly.

[0056] In one embodiment, the rotating platform 1 is provided with a first through hole 101, and the fixed platform 3 is provided with a second through hole 301. The axis of the first through hole 101 and the axis of the second through hole 301 both coincide with the rotation axis of the rotating platform 1.

[0057] It should be noted that a cylinder 102 is provided on the inner wall of the first through hole 101. The part of the cylinder 102 extending from the second side of the rotating platform 1 is connected to the inner ring 201 by screws, and the outer ring 202 is connected to the fixed platform 3 by screws.

[0058] In this embodiment, the rotating platform 1 and the fixed platform 3 are designed with coaxial through holes to form a through-type cable channel. All electrical wires are routed centrally through the through holes to avoid tangling with the rotating platform.

[0059] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A battery detection device, characterized by, include: The rotating platform (1) can rotate circumferentially. The detection component is set on the rotating platform (1) and is suitable for obtaining the internal structure information of the product; An angle encoder (2) is adapted to obtain the rotation angle information of the rotating platform (1). The angle encoder (2) includes an inner ring (201) and an outer ring (202). The outer ring (202) is sleeved on the outside of the inner ring (201) and the outer ring (202) is rotatably connected to the inner ring (201). One of the outer ring (202) and the inner ring (201) is connected to the rotating platform (1), and the other is relatively fixed in the circumferential direction. The rotation axes of the inner ring (201) and outer ring (202) of the angle encoder (2) coincide with the rotation axis of the rotating platform (1).

2. The battery detection apparatus according to claim 1, characterized by Also includes: The fixed platform (3) is connected to one of the inner ring (201) and the outer ring (202), which is relatively fixed in the circumferential direction; A rotating component (4) is disposed between the fixed platform (3) and the rotating platform (1), and the rotating platform (1) rotates with the fixed platform (3) through the rotating component (4).

3. The battery testing device according to claim 2, characterized in that, The rotating component (4) includes: The inner ring (401) is connected to the fixed platform (3); The outer ring (402) is connected to the rotating platform (1), and the outer ring (402) is sleeved on the outside of the inner ring (401); A rolling element (403) is disposed between the outer ring (402) and the inner ring (401), and the outer ring (402) and the inner ring (401) are rotatably engaged by the rolling element (403).

4. The battery testing device according to claim 3, characterized in that, Also includes: The driving component (5) is equipped with a driving end; The gear (6) is connected to the driving end of the driving member (5). Along the circumference of the outer ring (402), meshing teeth are provided on the circumferential surface of the outer ring (402), and the gear (6) meshes with the meshing teeth.

5. The battery testing device according to claim 4, characterized in that, Also includes: Base (7); The frame (8) includes a first end and a second end opposite to each other. The first end of the frame (8) is connected to the base (7). The fixed platform (3) is disposed on the frame (8) and is disposed on the side of the frame (8) perpendicular to the direction from the first end to the second end of the frame (8).

6. The battery testing device according to claim 5, characterized in that, The driving component (5) is disposed at the second end of the frame (8), the second end of the frame (8) is provided with a first notch, the end of the fixed platform (3) near the second end of the frame (8) is provided with a second notch, the first notch and the second notch are interconnected, and the driving component (5) is disposed within the first notch and the second notch.

7. The battery testing device according to claim 6, characterized in that, Also includes: Mounting plate (9) is disposed in the second notch. Mounting plate (9) is connected to fixed platform (3) and driving component (5).

8. The battery testing device according to claim 3, characterized in that, The rotating platform (1) includes a first surface and a second surface opposite to each other. The first surface of the rotating platform (1) is connected to the detection component, and the second surface of the rotating platform (1) is connected to the outer ring (402).

9. The battery testing device according to claim 8, characterized in that, The detection component includes: The detector (10) and the transmitter (11) are both located on the rotating platform (1) away from the top. The detector (10) and the transmitter (11) are symmetrically arranged, and the plane of symmetry of the detector (10) and the transmitter (11) coincides with the rotation axis of the rotating platform (1).

10. The battery testing device according to claim 8, characterized in that, The rotating platform (1) is provided with a first through hole (101), and the fixed platform (3) is provided with a second through hole (301). The axis of the first through hole (101) and the axis of the second through hole (301) both coincide with the rotation axis of the rotating platform (1).

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