High current overcurrent test fixture

Abstract

The utility model provides a kind of large current overcurrent test fixture, including bottom plate component, battery tray component, water pipe quick head component, test probe component, bottom plate component is equipped with battery tray component, the battery tray component inside is equipped with electric core, bottom plate component side is equipped with water pipe quick head component, water pipe quick head component side is equipped with test probe component, the test probe component is tested to the electric core in the battery tray component inside, the utility model has advantage in that: by the test probe cylinder on test probe component calibration probe pusher forward movement, when making calibration probe pusher on test probe head forward movement, make calibration probe pusher on test probe head and double-layer PCB board each other pressure and contact, and calibration test is carried out to double-layer PCB board, this fixture is suitable for 600A or 1200A large current quick clamping soft package electric core and carries out test, small, test error is small, and the structure is simple, ingenious, and low in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of test fixture technology, and in particular to a high current overcurrent test fixture. Background Technology

[0002] With the rapid development of electric vehicles, the power battery industry has been fully explored and has grown rapidly. To improve the battery density of power batteries, the country is now vigorously developing soft-pack lithium-ion batteries. All battery cells undergo rigorous testing, aging, and screening processes before leaving the factory, and battery testing fixtures are indispensable components in these processes.

[0003] During battery design and production, batteries frequently require testing equipment to examine various parameters and assess their electrical performance. In this testing process, the contact between the positive and negative terminals of the battery under test and the test points on the testing equipment is crucial. Poor contact can lead to increased contact resistance, affecting the accuracy of the test results. Therefore, the connection between the battery under test and the testing equipment places high demands on the system. During testing, fixtures are primarily used to connect the battery under test to the testing equipment, ensuring accurate transmission of information from the battery to the testing equipment.

[0004] In current battery manufacturing, due to different needs, there are various types and specifications of batteries, and the sizes of batteries of different specifications and types are also different. The distance between the positive and negative tabs of the battery varies greatly. As a result, when testing different models of batteries, it is necessary to use test fixtures corresponding to different models of batteries.

[0005] Currently, most battery testing fixtures use circular spring test probes to contact the positive and negative terminals of the battery. However, it is difficult to ensure that the circular spring test probes can make full contact with the positive and negative terminals of this type of pouch battery. Summary of the Invention

[0006] The purpose of this utility model is to solve the above-mentioned technical problems by providing a novel high-current overcurrent test fixture. The test probe cylinder on the test probe assembly drives the calibration probe push plate to move forward. When the test probe head on the calibration probe push plate moves forward, it presses and contacts the double-layer PCB board and performs calibration test on the double-layer PCB board. This fixture is suitable for testing 600A or 1200A high-current quick-clamping soft-pack battery cells. It is small in size, has small test error, and has a simple structure, ingenious design, and low manufacturing cost.

[0007] This utility model is achieved through the following technical solution: A high-current overcurrent test fixture includes a base plate assembly, a battery tray assembly, a water pipe quick-connect assembly, and a test probe assembly. The battery tray assembly is mounted on the base plate assembly, and a battery cell is located inside the battery tray assembly. A water pipe quick-connect assembly is located on one side of the base plate assembly, and a test probe assembly is located on the other side of the water pipe quick-connect assembly. The test probe assembly is aligned with the battery cell inside the battery tray assembly to perform testing. The base plate assembly includes a base plate, a left lower crossbeam, a left upper crossbeam, a left front baffle, a left rear baffle, a right lower crossbeam, a right upper crossbeam, a right front baffle, a right rear baffle, and a water receiving trough. The left and right sides of the base plate are respectively provided with a left lower crossbeam and a right lower crossbeam. The left lower crossbeam is provided with a left upper crossbeam, and the right lower crossbeam is provided with a right upper crossbeam. The left lower crossbeam is provided with a left front baffle and a left rear baffle at its front and rear ends, respectively. The right lower crossbeam is provided with a right front baffle and a right rear baffle at its front and rear ends, respectively. A water receiving trough is located below the front end of the left lower crossbeam.

[0008] As a further step, the battery tray assembly includes a tray bracket, a tray base plate, limiting blocks, a water pipe adapter plate, a water pipe connector support block, a water pipe female interface, a water pipe connector, a large copper fixing plate, a large copper support plate, a double-layer PCB board, a large copper contact head, and a large copper positioning pin. The tray bracket is provided with a tray base plate, and the tray base plate is provided with limiting blocks around its perimeter to prevent the battery cells from falling outside the tray base plate. A water pipe connector support block is provided on the left front end of the tray base plate, which fixes the water pipe adapter plate to the left front end of the tray base plate. Water pipe female interfaces are provided on both sides of the water pipe adapter plate. The water pipe female end interface is connected at one end to the water pipe connector, which is aligned with the water receiving tank for collecting wastewater. The other end of the water pipe female end interface is connected to the water pipe quick-connect assembly. A large copper fixing plate is provided on the front right side of the tray base plate. The large copper fixing plate is fixed on both sides of the front right side of the tray base plate by large copper support plates. Large copper contact heads are provided at both ends of the large copper fixing plate. A double-layer PCB board is provided on the outer wall of the large copper fixing plate. The large copper contact heads are connected to the test probe assembly. The double-layer PCB board is electrically connected to the battery cell.

[0009] As a further step, the quick-connect water pipe assembly includes a water pipe support plate, a water pipe bearing plate, a water pipe push plate, a linear bearing, a water-cooled guide rod, a water pipe drive cylinder, a water pipe male end interface, and a water pipe fixing plate. The water pipe support plate is installed on the left front end of the base plate. The water pipe support plate is provided with a water pipe bearing plate. The water pipe bearing plate has a cylinder through hole in the middle and guide rod through holes on both sides. One end of the water pipe drive cylinder passes through the cylinder through hole in the middle of the water pipe bearing plate and connects to the water pipe push plate. The water-cooled guide rod passes through the guide rod through holes on both sides of the water pipe bearing plate and connects to the water pipe push plate, and is locked to both sides of the water pipe bearing plate by a linear bearing. The front end of the water pipe push plate is provided with a water pipe fixing plate. The water pipe fixing plate is provided with several water pipe male end interfaces. The water pipe male end interfaces are inserted into the water pipe female end interfaces and are tightly connected.

[0010] As a further step, the test probe assembly includes a test probe base, test probe guide rails, a test probe slider, a test probe fixing block, a test probe cylinder, a current trace support plate, a test probe terminal block, a test probe connecting wire, a test probe push plate, a calibration probe push plate, a calibration probe mounting plate, a test calibration probe, and a test probe head. The test probe base is mounted on the front right side of the base plate, and a cylinder mounting seat is provided at the rear end of the test probe base. Several test probe guide rails are provided at the front end of the test probe base, and test probe sliders are provided on the test probe guide rails. Test probe fixing blocks are provided on the test probe sliders, and calibration probe push plates are provided on the test probe fixing blocks. Test probe heads are provided on both sides of the calibration probe push plate. The test probe heads are in close contact with and energized by the large copper contact head. The probe pusher plate has calibration probe mounting slots at the top and bottom of its middle section. The calibration probe mounting plates are embedded in these slots. The calibration probe mounting plates have several test calibration probes. These test calibration probes are aligned with the double-layer PCB board for calibration testing. The test probe cylinder is mounted on a cylinder mounting seat at the rear end of the test probe base. The rear end of the calibration probe pusher plate has a test probe pusher plate. The output shaft of the test probe cylinder is connected to the test probe pusher plate. One end of the current trace support plate is mounted on the outer wall of the cylinder mounting seat. The current trace support plate has several test probe terminal blocks. One end of the test probe connecting line is electrically connected to the test probe terminal block, and the other end is electrically connected to the test probe head.

[0011] As a further step, a number of large copper positioning pins are provided on the inner side wall of the large copper fixing plate.

[0012] As a further step, a pallet stacking rod is provided at the rear end of the pallet bottom plate to prevent the battery cells from falling out.

[0013] As a further step, an auxiliary channel communication block is provided on the left side of the tray bottom plate.

[0014] Furthermore, the base plate is provided with a plurality of mounting slots.

[0015] The beneficial effects of this utility model are as follows: (1) The test probe cylinder on the test probe assembly drives the calibration probe push plate to move forward. When the test probe head on the calibration probe push plate moves forward, the test probe head on the calibration probe push plate presses against and contacts the double-layer PCB board, and performs calibration test on the double-layer PCB board. It can simultaneously meet the testing of multiple channels of soft-pack cells, and is applicable to soft-pack cells of various sizes and models, with high versatility. (2) This fixture is suitable for testing 600A or 1200A high current fast clamping soft-pack battery cells. It is small in size, has small testing error, and has a simple structure, ingenious design and low manufacturing cost. (3) The fixture is also equipped with a quick-connect water pipe assembly. The water pipe male end is inserted into the water pipe female end interface and tightly connected. The water pipe female end interface can be directly facing the end face of the soft-pack battery cell. The water pipe female end interface can be vertically aligned with the end face of the soft-pack battery cell for spraying. Or, when the water pipe female end interface is not vertical, it can be tilted to spray a large area of ​​full coverage at multiple points, which will have a better cooling and fire extinguishing effect during fire sprinkler. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the high current overcurrent test fixture of this utility model; Figure 2 This is an exploded structural diagram of the high current overcurrent test fixture of this utility model; Figure 3 This is a schematic diagram of the base plate assembly structure of this utility model; Figure 4 This is an exploded view of the base plate assembly of this utility model; Figure 5 This is a schematic diagram of the battery tray assembly structure of this utility model; Figure 6 This is an exploded view of the battery tray assembly of this utility model; Figure 7 This is a schematic diagram of the water pipe quick connector assembly of this utility model; Figure 8 This is an exploded view of the quick-connect water pipe assembly of this utility model; Figure 9 This is a schematic diagram of the test probe assembly structure of this utility model; Figure 10 This is a schematic diagram of the exploded structure of the test probe assembly of this utility model; Reference numerals: 1. Base plate assembly; 101. Base plate; 1010. Mounting slot; 102. Left lower crossbeam; 103. Left upper crossbeam; 104. Left front baffle; 105. Left rear baffle; 106. Right lower crossbeam; 107. Right upper crossbeam; 108. Right front baffle; 109. Right rear baffle; 110. Water inlet trough; 2. Battery tray assembly; 201. Tray bracket; 202. Tray base plate; 2020. Tray stacking rod; 2021. Auxiliary channel communication block; 203. Limiting block; 204. Water pipe adapter plate; 205. Water pipe connector support block; 206. Water pipe female interface; 207. Water pipe connector; 208. Large copper fixing plate; 2080. Large copper positioning pin; 209. Large copper support plate; 210. Double-layer PCB board; 2 11. Large copper contact head; 3. Water pipe quick connector assembly; 301. Water pipe support plate; 302. Water pipe bearing plate; 303. Water pipe push plate; 304. Linear bearing; 305. Water-cooled guide rod; 306. Water pipe drive cylinder; 307. Water pipe male end interface; 308. Water pipe fixing plate; 4. Test probe assembly; 401. Test probe base; 402. Test probe guide rail; 403. Test probe slider; 404. Test probe fixing block; 405. Test probe cylinder; 406. Current trace support plate; 407. Test probe terminal block; 408. Test probe connecting wire; 409. Test probe push plate; 410. Calibration probe push plate; 411. Calibration probe mounting plate; 412. Test calibration probe; 413. Test probe head; 5. Battery cell. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] For reference Figures 1-10 As shown, a high-current overcurrent test fixture includes a base plate assembly, a battery tray assembly, a water pipe quick-connect assembly, and a test probe assembly. The battery tray assembly is mounted on the base plate assembly, and a battery cell is located inside the battery tray assembly. A water pipe quick-connect assembly is located on one side of the base plate assembly, and a test probe assembly is located on the other side of the water pipe quick-connect assembly. The test probe assembly is aligned with the battery cell inside the battery tray assembly to perform testing. The base plate assembly includes a base plate, a left lower crossbeam, a left upper crossbeam, a left front baffle, a left rear baffle, a right lower crossbeam, a right upper crossbeam, a right front baffle, a right rear baffle, and a water receiving trough. The left and right sides of the base plate are respectively provided with a left lower crossbeam and a right lower crossbeam. The left lower crossbeam is provided with a left upper crossbeam, and the right lower crossbeam is provided with a right upper crossbeam. The left lower crossbeam is provided with a left front baffle and a left rear baffle at its front and rear ends, respectively. The right lower crossbeam is provided with a right front baffle and a right rear baffle at its front and rear ends, respectively. A water receiving trough is located below the front end of the left lower crossbeam.

[0020] Preferably, the battery tray assembly includes a tray bracket, a tray base plate, limiting blocks, a water pipe adapter plate, a water pipe connector support block, a water pipe female interface, a water pipe connector, a large copper fixing plate, a large copper support plate, a double-layer PCB board, a large copper contact head, and a large copper positioning pin. The tray bracket is provided with a tray base plate, and the tray base plate is provided with limiting blocks around its perimeter to prevent the battery cells from falling outside the tray base plate. A water pipe connector support block is provided on the left front end of the tray base plate, which fixes the water pipe adapter plate to the left front end of the tray base plate. Water pipe female interfaces are provided on both sides of the water pipe adapter plate. The water pipe female end interface is connected at one end to the water pipe connector, which is aligned with the water receiving tank for collecting wastewater. The other end of the water pipe female end interface is connected to the water pipe quick-connect assembly. A large copper fixing plate is provided on the front right side of the tray base plate. The large copper fixing plate is fixed on both sides of the front right side of the tray base plate by large copper support plates. Large copper contact heads are provided at both ends of the large copper fixing plate. A double-layer PCB board is provided on the outer wall of the large copper fixing plate. The large copper contact heads are connected to the test probe assembly. The double-layer PCB board is electrically connected to the battery cell.

[0021] Preferably, the quick-connect water pipe assembly includes a water pipe support plate, a water pipe bearing plate, a water pipe push plate, a linear bearing, a water-cooled guide rod, a water pipe drive cylinder, a water pipe male end interface, and a water pipe fixing plate. The water pipe support plate is installed on the left front end of the base plate. The water pipe support plate is provided with a water pipe bearing plate. The water pipe bearing plate has a cylinder through hole in the middle and guide rod through holes on both sides. One end of the water pipe drive cylinder passes through the cylinder through hole in the middle of the water pipe bearing plate and connects to the water pipe push plate. The water-cooled guide rod passes through the guide rod through holes on both sides of the water pipe bearing plate and connects to the water pipe push plate, and is locked to both sides of the water pipe bearing plate by a linear bearing. The front end of the water pipe push plate is provided with a water pipe fixing plate. The water pipe fixing plate is provided with several water pipe male end interfaces. The water pipe male end interfaces are inserted into the water pipe female end interfaces and are tightly connected.

[0022] Preferably, the test probe assembly includes a test probe base, test probe guide rails, a test probe slider, a test probe fixing block, a test probe cylinder, a current trace support plate, a test probe terminal block, a test probe connecting wire, a test probe push plate, a calibration probe push plate, a calibration probe mounting plate, a test calibration probe, and a test probe head. The test probe base is mounted on the front right side of the base plate, and a cylinder mounting seat is provided at the rear end of the test probe base. Several test probe guide rails are provided at the front end of the test probe base, and test probe sliders are provided on the test probe guide rails. Test probe fixing blocks are provided on the test probe sliders, and calibration probe push plates are provided on the test probe fixing blocks. Test probe heads are provided on both sides of the calibration probe push plate. The test probe heads are in close contact with and energized by the large copper contact head. The calibration probe... The push plate has calibration probe mounting slots at the top and bottom of its middle section. The calibration probe mounting plates are embedded in these slots. The calibration probe mounting plates have several test calibration probes that are aligned with the double-layer PCB board for calibration testing. A test probe cylinder is mounted on a cylinder mounting seat at the rear end of the test probe base. The rear end of the calibration probe push plate has a test probe push plate. The output shaft of the test probe cylinder is connected to the test probe push plate. One end of a current trace support plate is mounted on the outer wall of the cylinder mounting seat. The current trace support plate has several test probe terminal blocks. One end of a test probe connecting line is electrically connected to the test probe terminal block, and the other end is electrically connected to the test probe head.

[0023] Preferably, the inner wall of the large copper fixing plate is provided with a number of large copper positioning pins.

[0024] Preferably, the rear end of the tray bottom plate is provided with a tray stacking rod, which prevents the battery cells from falling out.

[0025] Preferably, an auxiliary channel communication block is provided on the left side of the tray bottom plate.

[0026] Preferably, the base plate is provided with a plurality of mounting slots.

[0027] Based on the disclosure and teachings of the above specification, those skilled in the art can make appropriate changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A high-current overcurrent test fixture, characterized in that: The system includes a base plate assembly, a battery tray assembly, a water pipe quick-connect assembly, and a test probe assembly. The base plate assembly has the battery tray assembly mounted on it, and the battery tray assembly contains battery cells. A water pipe quick-connect assembly is located on one side of the base plate assembly, and a test probe assembly is located on the other side of the water pipe quick-connect assembly. The test probe assembly is aimed at the battery cells inside the battery tray assembly to perform tests. The base plate assembly includes a base plate, a left lower crossbeam, a left upper crossbeam, a left front baffle, a left rear baffle, a right lower crossbeam, a right upper crossbeam, a right front baffle, a right rear baffle, and a water receiving trough. The left and right sides of the base plate are respectively provided with a left lower crossbeam and a right lower crossbeam. The left lower crossbeam has a left upper crossbeam mounted on it, and the right lower crossbeam has a right upper crossbeam mounted on it. The left lower crossbeam has a left front baffle and a left rear baffle at its front and rear ends, respectively. The right lower crossbeam has a right front baffle and a right rear baffle at its front and rear ends, respectively. A water receiving trough is located below the front end of the left lower crossbeam.

2. The high-current overcurrent test fixture according to claim 1, characterized in that: The battery tray assembly includes a tray bracket, a tray base plate, limiting blocks, a water pipe adapter plate, a water pipe connector support block, a water pipe female end interface, a water pipe connector, a large copper fixing plate, a large copper support plate, a double-layer PCB board, a large copper contact head, and a large copper positioning pin. The tray bracket has a tray base plate, and the tray base plate has limiting blocks around its perimeter to prevent battery cells from falling outside the tray base plate. A water pipe connector support block is located on the front left side of the tray base plate, fixing the water pipe adapter plate to the front left side of the tray base plate. Water pipe female end interfaces are located on both sides of the water pipe adapter plate. One end of the female water pipe interface is connected to the water pipe connector, which is aligned with the water receiving tank to collect sewage. The other end of the female water pipe interface is connected to the quick-connect water pipe assembly. A large copper fixing plate is provided on the front right side of the tray base plate. The large copper fixing plate is fixed on both sides of the front right side of the tray base plate by large copper support plates. Large copper contact heads are provided at both ends of the large copper fixing plate. A double-layer PCB board is provided on the outer wall of the large copper fixing plate. The large copper contact heads are connected to the test probe assembly. The double-layer PCB board is electrically connected to the battery cell.

3. The high-current overcurrent test fixture according to claim 2, characterized in that: The quick-connect water pipe assembly includes a water pipe support plate, a water pipe bearing plate, a water pipe push plate, a linear bearing, a water-cooled guide rod, a water pipe drive cylinder, a water pipe male end interface, and a water pipe fixing plate. The water pipe support plate is installed on the front left side of the base plate. The water pipe support plate has a water pipe bearing plate with a cylinder through hole in the middle and guide rod through holes on both sides. One end of the water pipe drive cylinder passes through the cylinder through hole in the middle of the water pipe bearing plate and connects to the water pipe push plate. The water-cooled guide rod passes through the guide rod through holes on both sides of the water pipe bearing plate and connects to the water pipe push plate, and is locked to both sides of the water pipe bearing plate by linear bearings. The front end of the water pipe push plate has a water pipe fixing plate with several water pipe male end interfaces. The water pipe male end interfaces are inserted into the water pipe female end interfaces and are tightly connected.

4. The high-current overcurrent test fixture according to claim 2, characterized in that: The test probe assembly includes a test probe base, test probe guide rails, test probe sliders, test probe fixing blocks, test probe cylinders, current trace support plates, test probe terminal blocks, test probe connecting wires, test probe push plates, calibration probe push plates, calibration probe mounting plates, test calibration probes, and test probe heads. The test probe base is mounted on the front right side of the base plate. A cylinder mounting seat is located at the rear end of the test probe base. Several test probe guide rails are located at the front end of the test probe base. Test probe sliders are mounted on the test probe guide rails. Test probe fixing blocks are mounted on the test probe sliders. Calibration probe push plates are mounted on the test probe fixing blocks. Test probe heads are located on both sides of the calibration probe push plates. The test probe heads are in close contact with and energized by the large copper contact head. The calibration probe push plate contains... The upper and lower parts of the calibration probe mounting plate are provided with calibration probe mounting plate mounting slots. The calibration probe mounting plate is embedded in the calibration probe mounting plate mounting slots in the middle of the calibration probe push plate. The calibration probe mounting plate is provided with a plurality of test calibration probes. The test calibration probes are aligned with the double-layer PCB board for calibration testing. The test probe cylinder is mounted on the cylinder mounting seat at the rear end of the test probe base. The rear end of the calibration probe push plate is provided with a test probe push plate. The output shaft of the test probe cylinder is connected to the test probe push plate. One end of the current trace support plate is mounted on the outer wall of the cylinder mounting seat. The current trace support plate is provided with a plurality of test probe terminal blocks. One end of the test probe connecting line is electrically connected to the test probe terminal block, and the other end of the test probe connecting line is electrically connected to the test probe head.

5. The high-current overcurrent test fixture according to claim 2, characterized in that: The inner wall of the large copper fixing plate is provided with several large copper positioning pins.

6. The high-current overcurrent test fixture according to claim 2, characterized in that: The rear end of the tray base plate is provided with a tray stacking rod, which prevents the battery cells from falling out.

7. The high-current overcurrent test fixture according to claim 6, characterized in that: An auxiliary channel communication block is provided on the left side of the tray bottom plate.

8. The high-current overcurrent test fixture according to claim 1, characterized in that: The base plate is provided with several mounting slots.

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