A new biallelic bar detection device

Abstract

The utility model discloses a novel double aluminium bar detection device, including the top probe structure of upper portion and the bottom probe structure of lower portion and fixed base. Among them, fixed base is the bearing main body, and the bottom probe structure includes movable frame and bottom probe group on it, and the whole is controlled lifting by drive cylinder and is limited by linear guide group. The top probe structure includes adjustable top probe group and elastic compression block group, and the whole is controlled lifting by servo motor. The test seat of test substrate is provided with test through -hole for bottom probe group to penetrate and contact aluminium bar. When detecting, the up and down probe moves and contacts the upper and lower end of aluminium bar, and the corresponding internal resistance is tested to identify the assembly state, and the device alarms and locates the abnormal point, and the personnel checks and adjusts the abnormal point, which can effectively prevent the assembly anomaly of double aluminium bar. The utility model discloses the technical scheme of "up and down probe + internal resistance detection", which effectively solves the low precision and low efficiency in traditional double aluminium bar detection.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle battery technology, and in particular to a dual aluminum bar detection device for a power battery module CCS (CellContact System) component. Background Technology

[0002] The power battery is the "heart" of new energy vehicles, directly affecting the vehicle's safety, stability, driving range, and lifespan. In the composition of a power battery module, the CCS (Clean Cell System) module is the core hub connecting the battery cells and external circuits. Among these, the aluminum bar, as the core conductive unit of the CCS module, directly determines the current transmission efficiency and the module's electrical safety through its assembly quality. Assembly defects such as double aluminum bars (two aluminum bars stacked together) will lead to increased local resistance and heat generation. Long-term use will cause thermal runaway of the battery module, posing a significant threat to the safety of the power battery and even the entire vehicle. However, double aluminum bar detection is a technical challenge in the industry—especially when the aluminum bar thickness is only 0.3mm. Conventional testing methods, due to insufficient accuracy and low efficiency, cannot meet the quality control requirements of large-scale power battery production. Specific defects are as follows: Traditional manual visual inspection methods require operators to visually check the assembly of all aluminum busbars in the power battery module one by one, which has low inspection efficiency and seriously restricts the large-scale production of power battery modules. Traditional 2D vision inspection methods cannot identify micron-level differences in aluminum bar height, stacking tilt angles, and tiny gaps, which can easily lead to missed detections and insufficient inspection accuracy. In addition, when using weight-based testing, there are instances where two aluminum bars are stacked at one aluminum bar placement location and one aluminum bar is missing at another location. The weight discrepancies between the two offset each other, resulting in a high false positive rate. When using thickness-based testing, additional laser testing equipment and customized chemical apparatus are required, significantly increasing production costs. Utility Model Content

[0003] To address the shortcomings of the aforementioned technologies, this invention provides a novel dual aluminum bar detection device.

[0004] To solve the above technical problems, the technical solution adopted by this utility model is: a novel dual aluminum bar detection device, which includes an upper top probe structure, a lower bottom probe structure, and a fixed base; The top probe structure includes a hoisting frame, on which the top probe assembly is fixed. The hoisting frame is controlled by a servo motor to move in the height direction. The bottom probe structure includes a movable frame, on which a bottom probe assembly is fixed. The movable frame is connected to a drive cylinder and is controlled by the drive cylinder to move in the height direction. The fixed base supports the test substrate, the test substrate is provided with test seats arranged in an array, and the test seats are provided with test through holes penetrating the test substrate; The test substrate is equipped with a CCS assembly, and the aluminum bar of the CCS assembly is located on the test seat; the top probe group can contact the upper end face of the aluminum bar, and the bottom probe group can enter the test through hole and contact the lower end face of the aluminum bar.

[0005] Furthermore, the fixed base includes a base plate and a load-bearing frame, the movable frame is located between the base plate and the load-bearing frame, and the load-bearing frame is fixed with a hydraulic buffer, the buffer end of the hydraulic buffer abutting against the movable frame.

[0006] Furthermore, the active frame is provided with probe substrates arranged in an array, and the bottom probe group is mounted on the probe substrates and corresponds one-to-one with the test through holes of the test substrate.

[0007] Furthermore, the movable frame is fixed with a linear bearing of a linear guide assembly, a linear optical axis is provided through the linear bearing, and a shaft fixing seat is fixed at the end of the linear optical axis, which is fixed to the base plate.

[0008] Furthermore, the lifting frame of the probe structure is equipped with several probe track bars and pressure block track bars. The probe track bars include a fixed rail and a top probe assembly that is movably connected to it; the pressure block track bars include a fixed rail and an elastic pressure block assembly that is movably connected to it.

[0009] Furthermore, the elastic pressure block assembly includes a movable fixed seat, a fixed block, and a fixing bolt. The fixing bolt passes through the fixed seat and is connected to the fixed block. The fixing bolt is also fitted with a spring, with one end of the spring abutting against the fixed block and the other end of the spring abutting against the movable fixed seat.

[0010] Furthermore, the retaining block of the elastic pressure block assembly can abut against the upper end face of the aluminum bar.

[0011] Furthermore, the fixed base is also fixed with a test fixture.

[0012] This utility model provides a novel dual aluminum bar detection device, which consists of two main parts, upper and lower, and adopts a technical solution of "upper and lower probes + internal resistance detection". It effectively solves the pain points of traditional dual aluminum bar detection, balances accuracy and efficiency, can meet the quality control requirements of large-scale production of power batteries, ensure the assembly quality of CCS components, and thus improve the safety performance of power batteries. Attached Figure Description

[0013] Figure 1 This is an exploded view of the present invention.

[0014] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the fixed base of this utility model.

[0016] Figure 4 This is a schematic diagram of the bottom probe structure of this utility model.

[0017] Figure 5 This is a schematic diagram of the test substrate of this utility model.

[0018] Figure 6 This is a schematic diagram of the probe track bar of this utility model.

[0019] Figure 7 This is a schematic diagram of the pressure block track strip of this utility model.

[0020] Figure 8 This is a simplified structural diagram of the testing operation of this utility model.

[0021] In the diagram: 10. Fixed base; 20. Bottom probe structure; 30. Top probe structure; 40. Test fixture; 50. Test base plate; 11. Base plate; 12. Bearing frame; 13. Hydraulic buffer; 21. Movable frame; 22. Drive cylinder; 23. Linear guide assembly; 24. Probe base plate; 25. Bottom probe assembly; 31. Fixed rail; 32. Top probe assembly; 33. Elastic pressure block assembly; 34. Fixed block; 35. Spring; 36. Movable fixed seat; 37. Fixing bolt; 51. Test seat; 52. Test through hole; 101. No. 1 aluminum bar; 102. No. 2 aluminum bar. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] This utility model discloses a novel dual aluminum bar detection device, such as Figure 1 and Figure 2 As shown, it includes an upper top probe structure 30 and a lower bottom probe structure 20 and a fixed base 10. The lower fixed base 10 includes a base plate 11 and a support frame 12. The base plate 11 is fixed to the workbench by bolts or welding and is used to bear the force of the entire mechanism. The support frame 12 is fixed to the base plate 11 by support legs and is used to support and fix the test substrate 12.

[0024] The base plate 11 is fixed with a test fixture 40 and a bottom probe structure 20, such as Figure 4The bottom probe structure 20 shown includes a movable frame 21 positioned between the base plate 11 and the support frame 12. Probe substrates 24 are arranged in an array along the length of the movable frame 21, and several bottom probe assemblies 25 are mounted on the probe substrates 24. The movable frame 21 is connected to and controlled by a drive cylinder 22 to move in the height direction. The drive cylinder 22 is fixed to the base plate 11. Furthermore, the movable frame 21 is equipped with a linear bearing of a linear guide assembly 23. The linear bearing passes through a linear optical axis, and a shaft fixing seat is fixed to the end of the linear optical axis. The shaft fixing seat is fixed to the base plate 11. The linear guide assembly 23 restricts the horizontal offset generated when the movable frame 21 moves in the height direction, ensuring accurate positioning of the bottom probe assemblies 25.

[0025] Furthermore, the supporting frame 12 is fixed with a hydraulic buffer 13, and the buffer end of the hydraulic buffer 13 abuts against the upper end face of the movable frame 21, which is used to buffer the impact force of the movement of the movable frame 21, thereby increasing the service life of the entire device.

[0026] The upper top probe structure 30 includes a lifting frame, on which several probe rails and pressure block rails are installed, such as... Figure 6 The probe track shown includes a fixed rail 31 fixed to the hoisting frame and a top probe assembly 32 arrayed thereon; as shown Figure 7 The pressure block track shown includes a fixed rail 31 fixed to the lifting frame and an array of spring pressure block assemblies 33 arranged on it. It should be noted that both the top probe assembly 32 and the spring pressure block assembly 33 are movably mounted on the fixed rail 31, and the number and spacing of the corresponding top probe assembly 32 and spring pressure block assembly 33 can be adjusted according to the test substrate 12. Furthermore, the lifting frame is controlled by an external servo motor and can move up and down in the height direction, thereby moving the top probe assembly 32 and spring pressure block assembly 33 closer to or further away from the test substrate 12.

[0027] Furthermore, the spring block assembly 33 includes a movable fixed seat 36, a fixing bolt 37, and a fixing block 34. The fixing bolt 37 passes through the movable fixed seat 36 and is connected to the fixing block 34. The fixing bolt 37 is also fitted with a spring 35, with one end of the spring 35 abutting against the fixing block 34 and the other end of the spring 35 abutting against the movable fixed seat 36.

[0028] like Figure 5The test substrate 12 shown includes several rows of test seats 51 arranged in an array, each test seat 51 having a test through-hole 52 penetrating the test substrate 12. A battery module CCS assembly to be tested is placed on the upper surface of the test substrate 12, and the aluminum bars of the CCS assembly are mounted on each test seat 51. The top probe assembly 32 and spring pressure block assembly 33 of the top probe structure 30 can contact the upper surface of the aluminum bar under the action of a servo motor, while the bottom probe assembly 25 of the bottom probe structure 20 can enter the test through-hole 52 and contact the lower surface of the aluminum bar under the action of a drive cylinder 22.

[0029] The specific implementation method of this utility model is as follows: refer to Figure 8 As shown, the operator places the battery module CCS assembly to be tested on the test substrate 12, with each aluminum bar of the CCS assembly positioned on each test seat 51 of the test substrate 12. The operator starts the equipment, and the lifting frame slowly descends under the control of the servo motor until the top probe group 32 on the lifting frame contacts the upper surface of the aluminum bar. At this time, the fixing block 34 of the spring pressure block group 33 also contacts the upper surface of the aluminum bar, and the spring 35 is in a compressed state, its elastic force forcing the fixing block 34 to press the aluminum bar tightly. Afterwards, the movable frame 21 slowly rises under the action of the drive cylinder 22, and the movable frame 21 drives the probe substrate 24 and its bottom probe group 25 to rise together until the bottom probe group 25 enters the test through hole 52 of the test seat 51 and contacts the lower surface of the aluminum bar. The contact between the top probe group 32 and the bottom probe group 25 and the aluminum bar realizes the electrical conduction of the top probe group 32 and the bottom probe group 25, thereby testing the corresponding internal resistance to quickly detect the assembly status of the aluminum bar. Its specific working principle is as follows: The aluminum bar test at a single test point uses four test probes: two probes from the top probe group and two probes from the bottom probe group. Both the top and bottom probe groups share contact with the aluminum bar, allowing current to flow through it. This tests the corresponding internal resistance to verify if it falls within the normal range and to check the assembly condition of the aluminum bar. If a double aluminum bar is present, refer to... Figure 8 As shown, at this time, the top probe group contacts aluminum bar 101 and the bottom probe group contacts aluminum bar 102. Since the two contacts different aluminum bars, the corresponding internal resistance will be much greater than the normal internal resistance value. The equipment will alarm and indicate which test point has an abnormal test result. The operator can use this to check the assembly status of the aluminum bar at the corresponding position, which can effectively prevent the battery module CCS component from having double aluminum bar assembly.

[0030] In summary, this invention employs a "top and bottom probes + internal resistance detection" technical solution, transforming traditional appearance-based inspection into fundamental identification, effectively solving the problems of missed detections and misjudgments inherent in traditional methods. Simultaneously, the array-style arrangement of the probes and detection bases allows for simultaneous detection of aluminum batteries at multiple points, overcoming the limitations of manual and inefficient inspection on large-scale production and meeting the demands of high-volume, fast-paced production. Furthermore, this invention eliminates the need for additional high-cost equipment such as lasers, and the array test base and top and bottom probes of the test substrate can be adaptively adjusted according to the size and model of the CCS module, reducing repetitive investment in customized tooling and significantly lowering equipment procurement and maintenance costs. Therefore, this invention not only balances accuracy and efficiency but also adapts to the needs of large-scale production, contributing to the safe and large-scale development of power batteries.

[0031] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A novel dual-aluminum bar detection device, characterized in that: It includes an upper top probe structure (30), a lower bottom probe structure (20), and a fixed base (10). The top probe structure includes a hoisting frame, on which a top probe assembly (32) is fixed. The hoisting frame is controlled by a servo motor to move in the height direction. The bottom probe structure includes a movable frame (21) with a bottom probe group (25) fixed thereon. The movable frame (21) is connected to a drive cylinder (22) and is controlled by the drive cylinder (22) to move in the height direction. The fixed base (10) supports the test substrate (50), and the test substrate (50) is provided with test seats (51) arranged in an array. The test seats (51) are provided with test through holes (52) penetrating the test substrate (50). The test substrate (50) is equipped with a CCS assembly, and the aluminum bar of the CCS assembly is located on the test seat (51); the top probe group (32) can abut against the upper end face of the aluminum bar, and the bottom probe group (25) can enter the test through hole (52) and abut against the lower end face of the aluminum bar.

2. The novel dual-aluminum bar detection device according to claim 1, characterized in that: The fixed base (10) includes a base plate (11) and a support frame (12). The movable frame (21) is located between the base plate (11) and the support frame (12). The support frame (12) is fixed with a hydraulic buffer (13) and the buffer end of the hydraulic buffer (13) abuts against the movable frame.

3. The novel dual-aluminum bar detection device according to claim 2, characterized in that: The active frame (21) is provided with a probe substrate (24) and the probe substrate (24) is arranged in an array. The bottom probe group (25) is mounted on the probe substrate (24) and the bottom probe group (25) corresponds one-to-one with the test through hole (52) of the test substrate (50).

4. The novel dual-aluminum bar detection device according to claim 2, characterized in that: The movable frame (21) is fixed with a linear bearing of the linear guide group (23), and a linear optical axis is provided through the linear bearing. The end of the linear optical axis is fixed with a shaft fixing seat, which is fixed on the base plate (11).

5. The novel dual-aluminum bar detection device according to claim 1, characterized in that: The hoisting frame of the top probe structure is provided with several probe track bars and pressure block track bars. The probe track bars include a fixed rail (31) and a top probe group (32) movably connected thereto; the pressure block track bars include a fixed rail (31) and an elastic pressure block group (33) movably connected thereto.

6. The novel dual-aluminum bar detection device according to claim 5, characterized in that: The elastic pressure block assembly (33) includes a movable fixed seat (36), a fixed block (34) and a fixing bolt (37). The fixing bolt (37) passes through the fixed seat (36) and is connected to the fixed block (34). The fixing bolt (37) is also fitted with a spring (35), and one end of the spring (35) abuts against the fixed block (34), while the other end of the spring (35) abuts against the movable fixed seat (36).

7. A novel dual-aluminum bar detection device according to claim 6, characterized in that: The fixing block (34) of the elastic pressure block assembly (33) can abut against the upper end face of the aluminum bar.

8. The novel dual-aluminum bar detection device according to claim 1, characterized in that: The fixed base (10) is also fixed with a test fixture (40).

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