Continuous strength detection equipment for new energy battery pack

Abstract

The invention relates to the technical field of new energy battery strength detection, in particular to new energy battery pack continuous strength detection equipment, which comprises a placement frame, four corners of the placement frame are in threaded connection with a fixing frame, and the outer side surface of the fixing frame is in threaded connection with a first wrapping shell. Through arrangement of a first wrapping shell, a first rotating seat, a supporting seat, an air cylinder, a connecting seat, a connecting column, a spring, an extrusion plate, a supporting frame, a lower end column, a second connecting disc and the like, when the device inclines due to pulling force, inclination of a piston rod can disperse part of impact force through angle change of the piston rod, and direct axial rigid transmission of force is avoided; instantaneous load on components such as a cylinder body and a connecting piece is reduced, a certain buffering protection effect is achieved, the service life of equipment is prolonged, meanwhile, the spring of the structure can enable the piston rod to incline, force transmission is better attached to the stress design of the structure through angle adjustment, local stress concentration is avoided, and overall stress balance is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy battery strength detection technology, and in particular to a new energy battery pack continuous strength detection device. Background Art

[0002] New energy battery strength testing is a series of tests and evaluations on the structural stability, damage resistance and safety performance of new energy batteries (such as lithium-ion batteries, sodium-ion batteries, etc.) and their components (such as battery cells, battery packs, modules, etc.) under various mechanical effects. It is a key link in ensuring the safety and reliability of batteries throughout their life cycle, including production, transportation, use and recycling. It simulates the static pressure on the battery in scenarios such as extrusion and collision, tests the compression resistance of the battery shell and internal structure, and determines the pressure at which deformation, rupture or internal short circuit will occur. For example, continuous pressure is applied to the top and sides of the battery pack to observe its structural changes and electrical performance changes.

[0003] In the prior art, telescopic columns (such as the piston rod inside the cylinder, hydraulic telescopic rod, etc.) are subject to the danger of pulling during the lifting process, which is mainly due to structural design defects and force imbalance. The pulling force (especially lateral or oblique pulling) will cause the telescopic column to bear additional non-axial stress. Long-term repeated action can easily lead to column bending, local wear (such as peeling of the piston rod surface coating), and even fracture in severe cases. For example, when the position of the fixed frame of the detection equipment is too eccentric to the connection with the telescopic column, the telescopic column will be pulled lateraly due to uneven force during the lifting process, resulting in accelerated metal fatigue of the column and a shortening of its service life by 30% to 50%. Summary of the Invention

[0004] The purpose of the present invention is to provide a continuous strength testing device for new energy battery packs to solve the problem raised in the above background technology that the telescopic column (such as the piston rod inside the cylinder, the hydraulic telescopic rod, etc.) in the current existing technology is pulled during the lifting process. This is mainly due to structural design defects and force imbalance. The pulling force (especially lateral or oblique pulling) will cause the telescopic column to bear additional non-axial stress. Long-term repeated action can easily lead to column bending, local wear (such as peeling of the piston rod surface coating), and even fracture in severe cases. For example, when the position of the fixed frame of the testing equipment is too eccentric to the connection with the telescopic column, the telescopic column will produce lateral pulling due to uneven force during the lifting process, resulting in accelerated metal fatigue of the column and a shortening of the service life by 30% to 50%.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a new energy battery pack continuous strength testing device, comprising a placement rack, wherein the four corners of the placement rack are threadedly connected to a fixing rack, and the outer surface of the fixing rack is threadedly connected to a first wrapping shell, and further comprising:

[0006] A cylinder, wherein a first rotating seat is provided on one side surface of the first wrapping shell, a first connecting disk is threadedly connected to one side surface of the first rotating seat, a support seat is provided on one side surface of the first connecting disk, and a cylinder is fixedly connected to one side surface of the support seat;

[0007] Spring, a connecting seat is provided on the outer surface of the cylinder, connecting columns are fixedly connected to the left and right sides of the connecting seat, and the outer surface of the connecting column is wrapped with a spring.

[0008] Preferably, an extrusion plate is provided on the outer surface of the connecting column, and the other end of the spring is fixedly connected to the surface of the extrusion plate.

[0009] Preferably, four groups of connecting columns are provided on the connecting seat, and a second wrapping shell is provided on the outer surface of the connecting column.

[0010] Preferably, the inner surface of the second wrapping shell and the other side of the extruded plate are fixedly connected, and the inner surface of the spring and the connecting column are in contact with each other.

[0011] Preferably, a connecting seat is provided on the outer surface of the telescopic portion of the cylinder, and the cylinder and the connecting seat are threadedly connected via a support frame.

[0012] Preferably, the bottom of the cylinder and the lower end column are fixedly connected, and the lower surface of the lower end column is fixedly connected to a second connecting plate.

[0013] Preferably, the second connecting plate is threadedly connected to the second rotating seat, and the bottom of the second rotating seat is threadedly connected to the base.

[0014] Preferably, a second wrapping shell is provided on the outer surface of the base, and a third wrapping shell is provided on the outer side of the second wrapping shell.

[0015] Preferably, the second wrapping shell is used to protect the internal structure of the device, and the third wrapping shell is used to protect the second wrapping shell.

[0016] Preferably, the connecting column is inserted into the extrusion plate, the extrusion plate and the connecting column are slidably connected, and the cylinder is used for the overall start-up of the device.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present application is provided with a placement frame, a fixing frame, a first wrapping shell, a first rotating seat, a first connecting plate, a support seat, a cylinder, a connecting seat, a connecting column, a spring, an extrusion plate, a support frame, a second wrapping shell, a lower end column and a second connecting plate, so that when the device is tilted by a pulling force, the inclination of the piston rod can disperse part of the impact force through its own angle change, avoid direct axial rigid transmission of force, reduce the instantaneous load on components such as the cylinder body and connectors, play a certain buffering and protective role, and extend the service life of the equipment. At the same time, the spring of the structure can tilt the piston rod through angle adjustment, so that the force transmission is more in line with the force design of the structure, avoid local stress concentration, and ensure overall force balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a side structural diagram of a new energy battery pack continuous strength testing device proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the cooperation between the fixing frame and the cylinder of the new energy battery pack continuous strength testing equipment proposed by the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the cooperation between the fixing frame and the first wrapping shell of the new energy battery pack continuous strength testing equipment proposed by the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the cooperation between the first connection plate and the support base of the new energy battery pack continuous strength testing equipment proposed by the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the cooperation between the first rotating seat and the first connecting plate of the new energy battery pack continuous strength testing equipment proposed by the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the cooperation between the fixed frame and the first rotating seat of the new energy battery pack continuous strength testing equipment proposed by the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the second rotating seat and base cooperating with each other in a new energy battery pack continuous strength testing device proposed by the present invention.

[0026] In the figure: 1. Placement rack; 2. Fixed rack; 3. First wrapping shell; 4. First rotating seat; 5. First connecting plate; 6. Support seat; 7. Cylinder; 8. Connecting seat; 9. Connecting column; 10. Spring; 11. Extrusion plate; 12. Support rack; 13. Second wrapping shell; 14. Lower end column; 15. Second connecting plate; 16. Second rotating seat; 17. Base; 18. Third wrapping shell. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1 to 7 The present invention provides a technical solution: a new energy battery pack continuous strength testing device, comprising a placement rack 1, the four corners of the placement rack 1 are threadedly connected to a fixing rack 2, the outer surface of the fixing rack 2 is threadedly connected to a first wrapping shell 3, a side surface of the first wrapping shell 3 is provided with a first rotating seat 4, a side surface of the first rotating seat 4 is threadedly connected to a first connecting disk 5, a side surface of the first connecting disk 5 is provided with a support seat 6, a side surface of the support seat 6 is fixedly connected to a cylinder 7, when the cylinder 7 is started, it will extend and retract, driving the support seat 6 to move up and down, the support seat 6 will drive the first connecting disk 5 and the first rotating seat 4 to move up and down, and the first rotating seat 4 will rotate slightly due to the force on the upper end, the outer surface of the cylinder 7 is provided with a connecting seat 8, the left and right sides of the connecting seat 8 are fixedly connected with connecting columns 9, the outer surface of the connecting column 9 is wrapped with a spring 10, and the spring 10 provided on the connecting column 9 has the function of releasing the force when the device is reset and tilted through the characteristics of the spring 10.

[0029] An extrusion plate 11 is provided on the outer surface of the connecting column 9, and the other end of the spring 10 is fixedly connected to the surface of the extrusion plate 11. When the device is tilted, the spring 10 will be subjected to pressure from the connecting seat 8, causing the spring 10 to contract, thereby releasing force and returning to its original position.

[0030] There are four groups of connecting columns 9 on the connecting seat 8, and a second wrapping shell 13 is provided on the outer surface of the connecting column 9. The setting of four groups of connecting columns 9 can ensure the stability of the four corners of the connecting seat 8 during extrusion. The second wrapping shell 13 and the connecting column 9 are slidingly connected.

[0031] The inner surface of the second wrapping shell 13 and the other side of the extrusion plate 11 are fixedly connected, and the inner surface of the spring 10 and the connecting column 9 fit together, so that when the connecting seat 8 is subjected to force, the spring 10 can be better squeezed, and at the same time, the spring 10 will fit and stretch on the connecting column 9.

[0032] A connecting seat 8 is provided on the outer surface of the telescopic portion of the cylinder 7. The cylinder 7 and the connecting seat 8 are threadedly connected via a support frame 12. When the cylinder 7 is telescopically lifted, it will pass through the connecting seat 8.

[0033] The bottom of the cylinder 7 and the lower end column 14 are fixedly connected, and the lower surface of the lower end column 14 is fixedly connected to a second connecting plate 15, and the second connecting plate 15 is threadedly connected to a second rotating seat 16, and the bottom of the second rotating seat 16 is threadedly connected to a base 17. When the cylinder 7 is lifted and deviates, the second connecting plate 15 fixedly connected to the lower end column 14 will drive the second rotating seat 16 to move, preventing the lifting rod of the cylinder 7 from being pulled out of bending. At the same time, the threaded connection between the second rotating seat 16 and the base 17 ensures the overall stability of the device.

[0034] A second wrapping shell 13 is provided on the outer surface of the base 17, and a third wrapping shell 18 is provided on the outer side of the second wrapping shell 13. The second wrapping shell 13 is used to protect the internal structure of the device, and the third wrapping shell 18 is used to protect the second wrapping shell 13. The overall structure needs to be protected by the second wrapping shell 13 and the third wrapping shell 18, so as to increase the service life of the internal parts of the device.

[0035] The connecting column 9 is inserted into the extrusion plate 11, and the extrusion plate 11 and the connecting column 9 are slidably connected. The cylinder 7 is used to start the entire device. By starting the cylinder 7, the device is driven to move. When the connecting seat 8 performs an extrusion movement, it better pushes the spring 10 for extrusion.

[0036] Working principle: First, the new energy battery is placed into the placement rack 1 through the placement device. The four sides of the placement rack 1 are fixed with threads through the fixing rack 2, which ensures the stability of the four corners of the placement rack 1. At the same time, the new energy battery can be tested on all four sides during strength testing. After placing the new energy battery, tighten it around the four sides, start the device, and perform continuous strength testing on the new energy battery.

[0037] In the prior art, the dangers of pulling on telescopic columns (such as the piston rod inside the cylinder 7 or hydraulic telescopic rods) during the lifting process are primarily due to structural design flaws and unbalanced force. Pulling forces (especially lateral or diagonal pulling) can subject the telescopic column to additional non-axial stress. Long-term, repeated action can easily lead to column bending, localized wear (such as detachment of the piston rod's surface coating), and, in severe cases, fracture. For example, when the fixed frame 2 of the testing device is excessively eccentric from the connection to the telescopic column, the telescopic column can experience lateral pulling during lifting due to uneven force, accelerating metal fatigue and shortening its service life by 30% to 50%. Furthermore, the pulling force can interfere with the axial motion accuracy of the telescopic column, resulting in deviations in its lifting height and pressure output. For example, during battery pack compressive strength testing, if the telescopic column tilts slightly due to pulling, the device's compressive force on the battery pack will be unevenly distributed, potentially misdiagnosing "localized insufficient strength" or missing true structural weaknesses. The present device addresses this issue.

[0038] First, the cylinder 7 is started, and the internal piston rod moves, such as lifting two diagonal points at the same time, squeezing and bending the battery. Because the new energy battery has toughness, when the piston rod of the cylinder 7 is lifted, the piston rod will also be stressed, thereby bearing the pulling force. At this time, when the cylinder 7 is subjected to the pulling force, because the cylinder 7 lifts the support seat 6, the support seat 6 gives the first connecting plate 5 a lifting force. Then the first rotating seat 4 will bend due to the downward pressure of the fixing frame 2 and the lifting force of the cylinder 7. It will bend in the direction of the pulling force. When the first rotating seat 4 is bent, the force is conducted downward. The connecting seat 8 at the end will also tilt. The connecting seat 8 is fixed by a support frame 12. When the connecting seat 8 tilts, the spring 10 on one side will be squeezed and the spring 10 on the other side will be pulled. The springs 10 are fixed by extrusion plates 11 and shrink on the outside of the connecting column 9. The function of the connecting column 9 is to limit the position so that the device has a buffering force when it tilts. At this time, the lower end column 14 at the lower end of the cylinder 7 will drive the second rotating seat 16 to rotate. The lower end column 14 is threadedly connected through the second connecting disk 15. At the same time, the second connecting disk 15 and the base 17 are threadedly connected to ensure the stability of the connection.

[0039] The advantage of such tilting of the device is that when external extrusion force is suddenly applied, the tilt of the piston rod can disperse part of the impact force by changing its own angle, avoiding the force being directly transmitted along the axial rigidity, reducing the instantaneous load on the cylinder body, connectors and other components, playing a certain buffering and protective role, and extending the service life of the equipment. At the same time, the spring 10 of the structure can make the piston rod tilt and adjust the angle, so that the force transmission is more in line with the force design of the structure, avoiding local stress concentration, and ensuring overall force balance.

[0040] When the cylinder 7 needs to descend, the piston rod is first recovered, driving the fixed frame 2 in the first encapsulating shell 3 to return to its original position. At this time, the first rotating seat 4 on the first connecting plate 5 slowly returns to its original position. Through the design of the spring 10, the device rebounds to its original position. At the same time, the second rotating seat 16 at the lower end will also return to its original position to avoid deviation of the device. This reduces misjudgment of battery testing and performs strength tests on new energy batteries in turn. The external second encapsulating shell 13 and the third encapsulating shell 18 protect the internal structure and extend its service life.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A new energy battery pack continuous strength testing device, comprising a placement rack (1), characterized in that: The four corners of the placement rack (1) are threadedly connected to a fixing rack (2), and the outer surface of the fixing rack (2) is threadedly connected to a first wrapping shell (3), and further comprises: A cylinder (7), a first rotating seat (4) is provided on one side surface of the first wrapping shell (3), a first connecting disk (5) is threadedly connected to one side surface of the first rotating seat (4), a supporting seat (6) is provided on one side surface of the first connecting disk (5), and a cylinder (7) is fixedly connected to one side surface of the supporting seat (6); A spring (10) is provided on the outer surface of the cylinder (7), a connecting seat (8) is provided, and connecting columns (9) are fixedly connected to the left and right sides of the connecting seat (8), and the outer surface of the connecting column (9) is wrapped with a spring (10).

2. The continuous strength testing device for new energy battery packs according to claim 1, characterized in that: An extrusion plate (11) is provided on the outer surface of the connecting column (9), and the other end of the spring (10) is fixedly connected to the surface of the extrusion plate (11).

3. The continuous strength testing device for new energy battery packs according to claim 1, characterized in that: Four groups of the connecting columns (9) are provided on the connecting seat (8), and a second wrapping shell (13) is provided on the outer surface of the connecting columns (9).

4. The continuous strength testing device for new energy battery packs according to claim 3 is characterized in that: The inner surface of the second wrapping shell (13) and the other side of the extrusion plate (11) are fixedly connected, and the inner surface of the spring (10) and the connecting column (9) are in contact with each other.

5. The continuous strength testing device for new energy battery packs according to claim 1 is characterized in that: A connecting seat (8) is provided on the outer surface of the telescopic portion of the cylinder (7), and the cylinder (7) and the connecting seat (8) are threadedly connected via a support frame (12).

6. The continuous strength testing device for new energy battery packs according to claim 1, characterized in that: The bottom of the cylinder (7) and the lower end column (14) are fixedly connected, and the lower surface of the lower end column (14) is fixedly connected with a second connecting plate (15).

7. The continuous strength testing device for new energy battery packs according to claim 6, characterized in that: The second connecting plate (15) is threadedly connected to a second rotating seat (16), and the bottom of the second rotating seat (16) is threadedly connected to a base (17).

8. The continuous strength testing device for new energy battery packs according to claim 7, characterized in that: A second wrapping shell (13) is provided on the outer surface of the base (17), and a third wrapping shell (18) is provided on the outer side of the second wrapping shell (13).

9. The continuous strength testing device for new energy battery packs according to claim 8, characterized in that: The second wrapping shell (13) is used to protect the internal structure of the device, and the third wrapping shell (18) is used to protect the second wrapping shell (13).

10. The continuous strength testing device for new energy battery packs according to claim 1, characterized in that: The connecting column (9) is inserted into the extrusion plate (11), the extrusion plate (11) and the connecting column (9) are in sliding connection, and the cylinder (7) is used for the overall start-up of the device.

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