Battery pack extrusion test device for new energy vehicle and preparation method of battery pack extrusion test device

Abstract

The invention relates to a new energy vehicle battery pack extrusion test device and a preparation method thereof, the new energy vehicle battery pack extrusion test device comprises a test board, the top end of the test board is fixedly connected with a portal frame, and the inner side of the portal frame is slidably connected with a connecting board; complete vertical compression is formed through the portal frame, the hydraulic rod, the output shaft, the extrusion plate and other core components, the device has excellent load bearing capacity and extrusion control performance, the device adopts a manually-operated hydraulic system, fault hidden dangers caused by a complex electronic system are avoided, maintenance is convenient, the operation mode is visual and reliable, and the device is suitable for large-scale popularization and application. The test bench is suitable for test requirements of different types of new energy battery pack bodies, the test bench is made of a high-strength material, a rack transmission structure is driven by a gear to keep parallel in the downward pressing process of an extrusion plate, and the influence on a test result caused by inclination of a pressure head is avoided; the stability and smoothness of the test action are ensured, and the controllability and repeatability of the test process are effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of battery testing technology, and in particular to a battery pack extrusion testing device for new energy vehicles and a preparation method thereof. Background Art

[0002] With the rapid development of the new energy vehicle market, power batteries, as core components of new energy vehicles, have attracted much attention for their safety and performance reliability. During actual use, power battery packs are often exposed to various mechanical stresses and external forces, such as collisions, extrusions and other extreme working conditions, which may cause battery structural damage, internal short circuits or even thermal runaway, leading to fire or explosion accidents. Therefore, scientific and systematic testing of the compressive performance of power battery packs has become an important part of ensuring the safety performance of new energy vehicles.

[0003] In the actual implementation process, there are still some problems:

[0004] 1. Traditional battery pack extrusion test devices for new energy vehicles mostly rely on automated hydraulic control systems and complex electronic components to achieve pressure regulation and motion control. Although they can achieve a certain degree of automation, the system structure is complex, the failure rate is high, the maintenance cost and technical threshold are high, and control failure and motion deviation are prone to occur during use, resulting in difficulty in ensuring the accuracy and stability of test data. In addition, traditional devices often ignore the importance of uniform transmission of extrusion force. The pressure head is prone to tilt or offset during the extrusion process, resulting in uneven force, which affects the reliability of the test results. The operation interface is complex and manual adjustment is difficult. It cannot flexibly adapt to the testing requirements of battery packs of different specifications and types, limiting the widespread application of the device.

[0005] 2. During the extrusion test, battery packs for new energy vehicles are extremely prone to sudden safety issues such as structural rupture, thermal runaway, and harmful gas leakage. Traditional testing equipment has obvious deficiencies in protective design. The protective box is not tightly sealed and cannot effectively prevent the splashing of metal fragments and the spread of local flames generated when the battery pack ruptures, posing a large risk to personnel safety. In addition, most devices lack intelligent early warning systems for real-time monitoring of temperature changes and harmful gas leaks, and cannot detect abnormalities in time at the early stages of an accident, which can easily lead to the expansion of safety accidents and seriously threaten the life and property safety of test operators. In addition, due to imperfect gas emission treatment, harmful gases are easily discharged directly into the environment, causing environmental pollution and secondary hazards. Summary of the Invention

[0006] (1) Technical issues to be resolved

[0007] In order to solve the above problems in the prior art, the present invention provides a battery pack extrusion test device for new energy vehicles and a preparation method thereof, which solve the problems of structural instability and insufficient safety protection in traditional battery pack extrusion tests.

[0008] (2) Technical solution

[0009] In order to achieve the above object, the main technical solutions adopted by the present invention are:

[0010] A battery pack extrusion testing device for new energy vehicles and a preparation method thereof, comprising a test bench, the top of the test bench being fixedly connected to a gantry, the inner side of the gantry being slidably connected to a connecting platform, the connecting platform being connected to a transmission chain, the transmission chain being connected to the gantry, the top of the gantry being fixedly connected to a mounting box, the middle of the mounting box being fixedly connected to a hydraulic rod, and the bottom end of the hydraulic rod being fixedly connected to an output shaft.

[0011] The bottom end of the output shaft is fixedly connected with a base, the bottom end of the base is fixedly connected with a protection box, and a fixed window is fixedly embedded on the front side of the protection box.

[0012] The bottom end of the protection box is fixedly connected with an extrusion plate, and the inner wall of the protection box is fixedly connected with a temperature control switch.

[0013] A warning light is fixedly connected to one side wall of the gantry, and the temperature control switch is electrically connected to the warning light.

[0014] The top of the base is fixedly connected to two fixing plates, the inner sides of the two fixing plates are fixedly connected to racks, the inner wall of the installation box is rotatably connected to two gears, and the two gears are respectively meshed with the two racks.

[0015] A connecting rod is fixedly connected between the two gears, and two limiting rods are fixedly connected to the top of the base. The two limiting rods are vertically slidably connected to the installation box.

[0016] The top of the base is fixedly connected to a transmission pump, one side of the transmission pump is fixedly connected to an air inlet, one side of the transmission pump is fixedly connected to an air outlet, one end of the air outlet is fixedly connected to connecting pipe 1, one end of the air inlet is fixedly connected to connecting pipe 2, one end of connecting pipe 2 passes through the protective box, and the middle of connecting pipe 2 is fixedly connected to a filter plate.

[0017] A gas alarm detection switch is fixedly connected to the top of the transmission pump, a new energy battery pack body is placed on the top of the test bench, and a reinforcement plate is fixedly connected to the top of the base.

[0018] A method for preparing a battery pack extrusion test for a new energy vehicle comprises the following steps:

[0019] S1: Place the new energy battery pack firmly on the test bench;

[0020] S2: Manually operate the hydraulic rod to press down the hydraulic rod installed on the gantry, driving the compression structure composed of the output shaft, base, protection box and extrusion plate to move downward in the vertical direction;

[0021] S3: Control the extrusion force and action time by manually adjusting the pressure rate and downward stroke of the hydraulic rod;

[0022] S4: During the extrusion process, the rack and gear transmission structure cooperate to keep the extrusion plate parallel and pressed downward, ensuring that the extrusion force is evenly applied to the surface of the new energy battery pack body;

[0023] S5: The new energy battery pack is sealed and protected by a protective box to prevent debris from flying or flames from spreading. A fixed window is used to observe the internal conditions. The temperature control switch inside the protective box is used to detect temperature abnormalities and activate the alarm light to provide early warning.

[0024] S6: If the new energy battery pack generates flammable and harmful gases during the extrusion process, the gas will be led to the transmission pump through the connecting pipe 2, and discharged after purification through the filter plate. At the same time, the dangerous gas concentration will be monitored with the help of the gas alarm detection switch, and an audible and visual alarm will be issued in case of abnormality.

[0025] The adjustment of the pressurization rate is achieved by controlling the oil inlet of the hydraulic rod, and the downward pressing stroke is limited by a mechanical limit device.

[0026] (3) Beneficial effects

[0027] The beneficial effects of the present invention are:

[0028] 1. In the present invention, a complete vertical compression is formed by core components such as a gantry, a hydraulic rod, an output shaft, and an extrusion plate, which has excellent load-bearing capacity and extrusion control performance. The device adopts a manually operated hydraulic system, which avoids the hidden dangers of failure caused by complex electronic systems, is easy to maintain, and the operation method is intuitive and reliable. It is suitable for the test requirements of different types of new energy battery packs. The test bench is made of high-strength materials. During the downward pressing process of the extrusion plate, the gear drives the rack transmission structure to maintain parallelism, avoiding the influence of the skew of the pressure head on the test results. The entire compression structure moves vertically along the gantry sliding guide rail, ensuring the stability and smoothness of the test action, effectively improving the controllability and repeatability of the test process, and is widely applicable to new energy vehicle battery companies, testing institutions, etc. for routine failure testing or ultimate pressure withstand evaluation.

[0029] 2. The present invention is suitable for emergencies such as thermal runaway or gas leakage that may occur during the test process. Its protective box structure is sturdy and sealed, and can fully wrap the new energy battery pack body, effectively preventing metal fragments from splashing or local fire spreading due to battery rupture during squeezing, thereby protecting the safety of operators. A fixed window is provided on the front of the protective box. While ensuring sealing, it is convenient to observe the status of the new energy battery pack body in real time, thereby improving the monitoring capability of the test process. At the same time, a temperature control switch is provided in the protective box, which can sense the temperature changes of the new energy battery pack body in real time. When an abnormal temperature rise is detected, the alarm system is automatically linked to issue an early warning prompt, so that the operator can respond in the first time to avoid the expansion of the accident. In addition, the device is equipped with a gas transmission and filtration system, which can transport the gas escaping after the battery ruptures to the transmission pump through the connecting pipe 2, and perform preliminary purification treatment through the filter plate to prevent the spread of harmful gases and pollute the environment. The gas detection switch can monitor the concentration of volatile harmful substances and automatically trigger an audible and visual alarm when the concentration exceeds the standard, significantly improving the safety protection level during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 It is a schematic structural diagram of the back side of the present invention;

[0032] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 It is a structural schematic diagram of the base portion of the present invention;

[0034] Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle;

[0035] Figure 6 It is a structural schematic diagram of the protection box part of the present invention.

[0036] [Description of Reference Numerals]

[0037] 1. Test bench; 2. New energy battery pack body; 3. Gantry; 4. Drive chain; 5. Warning light; 6. Base; 7. Connecting platform; 8. Rack; 9. Limit rod; 10. Transmission pump; 11. Gas alarm detection switch; 12. Connecting pipe 1; 13. Air inlet; 14. Air outlet; 15. Connecting pipe 2; 16. Output shaft; 17. Reinforcement plate; 18. Mounting box; 19. Hydraulic rod; 20. Connecting rod; 21. Fixed plate; 22. Protective box; 23. Fixed window; 24. Gear; 25. Filter plate; 26. Extrusion plate; 27. Temperature control switch. DETAILED DESCRIPTION

[0038] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0039] Please refer to Figures 1 to 6 As shown, a battery pack extrusion testing device for new energy vehicles and a preparation method thereof of the present invention include a test bench 1, the top of the test bench 1 is fixedly connected to a gantry 3, the inner side of the gantry 3 is slidably connected to a connecting platform 7, the connecting platform 7 is connected to a transmission chain 4, the transmission chain 4 is connected to the gantry 3, the top of the gantry 3 is fixedly connected to a mounting box 18, the middle of the mounting box 18 is fixedly connected to a hydraulic rod 19, and the bottom end of the hydraulic rod 19 is fixedly connected to an output shaft 16.

[0040] Optionally, the bottom end of the output shaft 16 is fixedly connected to the base 6, and the bottom end of the base 6 is fixedly connected to the protective box 22, and the front of the protective box 22 is fixedly embedded with a fixed window 23. In the actual implementation process, the bottom end of the output shaft 16 is firmly connected to the base 6, ensuring the force stability of the entire compression structure. The protective box 22 is installed under the base 6 and completely covers the new energy battery pack body 2 during the test to avoid safety risks caused by battery deformation or rupture. The front of the protective box 22 is embedded with a fixed window 23, allowing the operator to observe the internal status in real time without touching the battery, effectively improving the intuitiveness and safety of the operation.

[0041] Optionally, a compression plate 26 is fixedly connected to the bottom end of the protective box 22, and a temperature control switch 27 is fixedly connected to the inner wall of the protective box 22. In actual implementation, the compression plate 26 serves as the direct pressure component, and its bottom is fixedly connected to the protective box 22 to form a rigid integral structure, ensuring the synchronization and effectiveness of the compression action. The temperature control switch 27 is provided on the inner wall of the protective box 22 for real-time monitoring of temperature changes on the surface of the tested new energy battery pack body 2. In particular, when the battery experiences thermal runaway or overheating, the temperature control switch 27 can respond quickly and trigger the alarm system in a timely manner, assisting manual decision-making and preventing the accident from escalating.

[0042] Optionally, a warning light 5 is fixedly connected to a side wall of the gantry 3, and the temperature control switch 27 is electrically connected to the warning light 5. In actual implementation, the warning light 5 installed on the side wall of the gantry 3 forms a linkage circuit with the internal temperature control switch 27. Once the temperature control switch 27 detects that the temperature of the new energy battery pack body 2 abnormally exceeds a preset threshold, the warning light 5 is automatically triggered to emit a strong visual signal.

[0043] Optionally, two fixed plates 21 are fixedly connected to the top of the base 6, and racks 8 are fixedly connected to the inner sides of the two fixed plates 21. The inner wall of the mounting box 18 is rotatably connected to two gears 24, and the two gears 24 are respectively meshed with the two racks 8.

[0044] Optionally, a connecting rod 20 is fixedly connected between the two gears 24 , and two limiting rods 9 are fixedly connected to the top of the base 6 . The two limiting rods 9 are vertically slidably connected to the installation box 18 .

[0045] Optionally, the top of the base 6 is fixedly connected to a transmission pump 10, one side of the transmission pump 10 is fixedly connected to an air inlet 13, one side of the transmission pump 10 is fixedly connected to an air outlet 14, one end of the air outlet 14 is fixedly connected to a connecting pipe 12, one end of the air inlet 13 is fixedly connected to a connecting pipe 2 15, one end of the connecting pipe 2 15 passes through the protective box 22, and the middle of the connecting pipe 2 15 is fixedly connected to a filter plate 25. In the actual implementation process, the transmission pump 10 can quickly draw out the gas inside the protective box 22. The connecting pipe 2 15 passes through the protective box 22 to connect to the air inlet 13, and the connecting pipe 1 12 is connected to the air outlet 14. The gas is discharged after being purified by the filter plate 25, effectively reducing the risk of leakage of harmful substances. In actual use, this structure not only improves the environmental safety during the test process, but also facilitates the subsequent detection and recording of the released gas components, meeting the environmental protection and risk control requirements in the power battery safety test.

[0046] Optionally, a gas alarm detection switch 11 is fixedly connected to the top of the transfer pump 10, the new energy battery pack body 2 is placed on the top of the test bench 1, and a reinforcement plate 17 is fixedly connected to the top of the base 6. In actual implementation, the gas alarm detection switch 11 is set on the top of the transfer pump 10 to perform real-time concentration analysis of the extracted gas. Once a specific flammable or harmful gas is detected exceeding the standard, an audible and visual alarm is automatically issued, thereby improving the active safety response capability of the operation process.

[0047] Optionally, a method for preparing a battery pack for a new energy vehicle for an extrusion test comprises the following steps:

[0048] S1: Place the new energy battery pack body 2 firmly on the test bench 1;

[0049] S2: Manually operate the hydraulic rod 19 to press down the hydraulic rod 19 installed on the gantry 3, driving the compression structure composed of the output shaft 16, the base 6, the protection box 22 and the extrusion plate 26 to move downward in the vertical direction;

[0050] S3: Control the extrusion force and action time by manually adjusting the pressurization rate and downward stroke of the hydraulic rod 19;

[0051] S4: During the extrusion process, the extrusion plate 26 is kept parallel and pressed downward by the cooperation of the rack 8 and the gear 24 transmission structure, ensuring that the extrusion force is evenly applied to the surface of the new energy battery pack body 2;

[0052] S5: The new energy battery pack body 2 is sealed and protected by the protective box 22 to prevent debris from flying or flames from spreading. At the same time, the internal situation can be observed through the fixed window 23. The temperature control switch 27 in the protective box 22 is used to monitor temperature anomalies and activate the alarm light 5 to issue an early warning.

[0053] S6: If the new energy battery pack body 2 generates flammable and harmful gases during the extrusion process, the gas will be led to the transmission pump 10 through the connecting pipe 2 15, and discharged after being purified by the filter plate 25. At the same time, the dangerous gas concentration is monitored with the help of the gas alarm detection switch 11, and an audible and visual alarm will be issued in case of abnormality.

[0054] Optionally, the adjustment of the pressurization rate is achieved by controlling the oil inlet of the hydraulic rod 19, and the downward pressing stroke is limited by a mechanical limit device.

[0055] Working principle: Before the test begins, the user places the new energy battery pack body 2 to be tested firmly on the test bench 1. The test bench 1 is designed as a high-strength platform that can withstand greater pressure. Two limit rods 9 and a reinforcement plate 17 are provided on the base 6 to stably clamp the new energy battery pack body 2 in the target position to prevent displacement or tipping during the extrusion process, ensuring the safety of the experiment and the authenticity of the data. After preparation, the user starts the hydraulic rod 19 through manual operation. The hydraulic rod 19 is fixed to the top of the gantry 3, and its lower end is connected to the output shaft 16. The base 6, the protective box 22 and the extrusion plate 26 are installed at the bottom of the output shaft 16 to form an integrated downward pressure structure. The pressurization rate and stroke length of the hydraulic system are manually controlled. The user can adjust the extrusion force and time to flexibly respond to the testing requirements of different new energy battery pack bodies 2. Under the push of the hydraulic rod 19, the entire extrusion structure moves downward in the vertical direction inside the gantry 3. The gantry 3 provides stable vertical support and guiding functions for the device, avoiding the problem of pressure head offset or tilting. Transmission chains 4 are provided on both sides of the gantry 3 to connect the sliding structure and the connecting platform 7 to ensure that the entire extrusion process is smooth and orderly. Rack 8-gear 24 transmission structure is also provided on both sides of the base 6. The two gears 24 rotate synchronously through the connecting rod 20, so that the extrusion plate 26 in the installation box 18 remains parallel and pressed down to avoid tilting left and right, ensuring that the extrusion force is evenly transmitted to the surface of the new energy battery pack body 2. This structural design The design improves the stability and accuracy of the test data. During the extrusion process, the new energy battery pack body 2 is completely covered by the protective box 22. The protective box 22 has a solid and sealed shell structure, which can effectively prevent the new energy battery pack body 2 from being splashed with debris or sudden flames caused by structural rupture. A fixed window 23 is provided on the front of the protective box 22 to facilitate the operator to observe the internal situation in real time without affecting the test process. A temperature control switch 27 is provided inside the protective box 22 to sense whether the new energy battery pack body 2 has abnormal heating or thermal runaway during the extrusion process. When the temperature exceeds the set threshold, the temperature control switch 27 automatically links the external alarm light 5 to send a visual warning signal to remind the operator to stop extrusion in time. At the same time, considering the new energy battery pack The rupture of the main body 2 may be accompanied by the leakage of combustible gas or smoke. The device is provided with a transmission pump 10 on the base 6, and the protective box 22 is connected to the transmission pump 10 through the connecting pipe 2 15. After the gas is drawn out, it is first filtered through the filter plate 25 and then discharged from the connecting pipe 12. A gas alarm detection switch 11 is installed on the top of the transmission pump 10, which can detect the concentration of dangerous gases in the exhausted gas. If abnormal components are detected, an audible and visual alarm will be triggered to further improve operational safety. In summary, the device has a simple structure, intuitive operation, and flexible and reliable manual control. It is suitable for laboratories or enterprises to conduct pressure resistance performance evaluation and failure simulation tests on the main body 2 of the new energy battery pack of new energy vehicles, providing strong support for battery structure design and safety standard formulation.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0057] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery pack compression test device for new energy vehicles, comprising a test bench (1), characterized in that: The top of the test bench (1) is fixedly connected to a gantry (3), the inner side of the gantry (3) is slidably connected to a connecting platform (7), the connecting platform (7) is connected to a transmission chain (4), the transmission chain (4) is connected to the gantry (3), the top of the gantry (3) is fixedly connected to a mounting box (18), the middle of the mounting box (18) is fixedly connected to a hydraulic rod (19), and the bottom end of the hydraulic rod (19) is fixedly connected to an output shaft (16).

2. A new energy vehicle battery pack compression test device according to claim 1, characterized in that: The bottom end of the output shaft (16) is fixedly connected to a base (6), the bottom end of the base (6) is fixedly connected to a protection box (22), and a fixed window (23) is fixedly embedded on the front of the protection box (22).

3. The new energy vehicle battery pack compression test device according to claim 2, characterized in that: The bottom end of the protection box (22) is fixedly connected to an extrusion plate (26), and the inner wall of the protection box (22) is fixedly connected to a temperature control switch (27).

4. The battery pack compression test device for new energy vehicles according to claim 3, characterized in that: A warning light (5) is fixedly connected to one side wall of the gantry (3), and the temperature control switch (27) is electrically connected to the warning light (5).

5. The new energy vehicle battery pack compression test device according to claim 4, characterized in that: The top of the base (6) is fixedly connected to two fixing plates (21), the inner sides of the two fixing plates (21) are fixedly connected to racks (8), the inner wall of the installation box (18) is rotatably connected to two gears (24), and the two gears (24) are respectively meshed with the two racks (8).

6. The new energy vehicle battery pack compression test device according to claim 5, characterized in that: A connecting rod (20) is fixedly connected between the two gears (24), and two limiting rods (9) are fixedly connected to the top of the base (6). The two limiting rods (9) are vertically slidably connected to the installation box (18).

7. The new energy vehicle battery pack compression test device according to claim 6, characterized in that: The top of the base (6) is fixedly connected to a transmission pump (10), one side of the transmission pump (10) is fixedly connected to an air inlet (13), one side of the transmission pump (10) is fixedly connected to an air outlet (14), one end of the air outlet (14) is fixedly connected to a connecting pipe 1 (12), one end of the air inlet (13) is fixedly connected to a connecting pipe 2 (15), one end of the connecting pipe 2 (15) passes through a protective box (22), and the middle of the connecting pipe 2 (15) is fixedly connected to a filter plate (25).

8. The new energy vehicle battery pack compression test device according to claim 7, characterized in that: The top of the transmission pump (10) is fixedly connected to a gas alarm detection switch (11), the top of the test bench (1) is placed with a new energy battery pack body (2), and the top of the base (6) is fixedly connected to a reinforcement plate (17).

9. A method for preparing a battery pack for a new energy vehicle by performing an extrusion test, characterized in that: The test device according to any one of claims 1 to 8 comprises the following steps: S1: Place the new energy battery pack body (2) firmly on the test bench (1); S2: manually operating the hydraulic rod (19) to press the hydraulic rod (19) installed on the gantry (3) downward, thereby driving the compression structure composed of the output shaft (16), the base (6), the protection box (22) and the extrusion plate (26) to move downward in the vertical direction; S3: manually adjusting the pressure rate and downward stroke of the hydraulic rod (19) to control the extrusion force and action time; S4: During the extrusion process, the extrusion plate (26) is kept parallel and pressed downward by the cooperation of the rack (8) and the gear (24) transmission structure, ensuring that the extrusion force is evenly applied to the surface of the new energy battery pack body (2); S5: The new energy battery pack body (2) is sealed and protected by a protective box (22) to prevent debris from flying or flames from spreading. At the same time, the internal situation can be observed with the help of a fixed window (23). The temperature control switch (27) provided in the protective box (22) is used to monitor temperature anomalies and activate the alarm light (5) for early warning; S6: If the new energy battery pack body (2) generates flammable and harmful gases during the extrusion process, the gas is led to the transmission pump (10) through the connecting pipe 2 (15), and discharged after being purified by the filter plate (25). At the same time, the concentration of dangerous gases is monitored with the help of the gas alarm detection switch (11), and an audible and visual alarm is issued in case of abnormality.

10. The method for preparing a battery pack for a new energy vehicle by extrusion testing according to claim 9, characterized in that: The adjustment of the pressurization rate is achieved by controlling the oil intake of the hydraulic rod (19), and the downward pressing stroke is limited by a mechanical limit device.

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