New energy automobile power battery pack test platform

Abstract

The invention discloses a new energy automobile power battery pack test platform, and relates to the technical field of new energy automobiles, the new energy automobile power battery pack test platform comprises a detection mechanism, a cooling mechanism is arranged on the upper side in the detection mechanism, and a clamping mechanism located on the inner side of the detection mechanism is arranged in the middle of the cooling mechanism; a detection mechanism; comprising a mounting frame; a cooling mechanism; comprising an experiment platform cabin, a clamping mechanism; comprising a first movable base, and the right end of the first movable base is connected with a first pull rope. The problems that certain potential safety hazards exist in a traditional battery pack test method, explosion accidents cannot be completely avoided, the battery cannot be cooled before thermal runaway explosion, thermal runaway of the battery possibly occurs, and explosion is caused are solved, meanwhile, the new energy battery cannot be accurately positioned and clamped in the test process, and the test efficiency is improved. And shaking is easily caused by factors such as external collision.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a new energy vehicle power battery pack testing platform. Background Art

[0002] New energy vehicles are the general trend of the future. The most important technology in new energy vehicles is the power battery pack. With the continuous expansion of the market, the safety of power batteries has become the focus of industry attention. Therefore, it is necessary to develop a device that can effectively suppress explosions.

[0003] In the Chinese authorization announcement number CN221326716U, a test platform for new energy vehicle power batteries is disclosed, including a power battery pack test structure and a single cell test structure. The power battery pack test structure includes: a charging component and a discharging component, an electric energy conversion component, an electric energy recovery component, and an operating component; the charging component is connected to the AC power supply with the help of the electric energy conversion component; the discharging component is connected to the electric energy recovery component; the operating component is connected to the power battery pack; the single cell test structure includes: a charging component, a discharging load, and an operating component; the charging component is connected to the AC power supply with the help of the electric energy conversion component; the discharging load is used to connect the two ends of the single cell when discharging the single cell, which solves the technical problem of low efficiency of the existing test platform.

[0004] Compared with the above-mentioned new energy vehicle testing platform, there are still the following defects: the traditional battery pack testing method has certain safety hazards, cannot completely avoid the occurrence of explosion accidents, and cannot cool down the battery before it explodes due to thermal runaway, which may cause the battery to explode due to thermal runaway. At the same time, during the testing process of new energy batteries, they cannot be accurately positioned and clamped, and are easily shaken due to external collisions and other factors. Summary of the invention

[0005] The purpose of the present invention is to provide a new energy vehicle power battery pack testing platform to solve the following technical problems: the traditional battery pack testing method has certain safety hazards, cannot completely avoid the occurrence of explosion accidents, cannot cool down the battery before it thermally runs away and explodes, which may cause the battery to thermally run away and cause explosion. At the same time, during the testing process of the new energy battery, it is impossible to accurately position and clamp it, and it is easy to cause shaking due to external collisions and other factors.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A new energy vehicle power battery pack test platform, a detection mechanism, a cooling mechanism is arranged on the upper inner side of the detection mechanism, and a clamping mechanism located inside the detection mechanism is arranged in the middle of the cooling mechanism;

[0008] The detection mechanism comprises a mounting frame, a safety protection cabin is arranged on the inner side of the lower end of the mounting frame, a liquid nitrogen storage tank is arranged in the middle of the safety protection cabin, a compression refrigerator is arranged on the left side of the liquid nitrogen storage tank, a driving gas cylinder is arranged on the right side of the liquid nitrogen storage tank, a connecting pipeline is arranged on the rear side of the liquid nitrogen storage tank, a transfer pipeline connected to the mounting frame is arranged on the upper end of the connecting pipeline, and a liquid nitrogen atomizing nozzle is arranged on the lower end of the transfer pipeline;

[0009] A cooling mechanism; comprising an experimental platform cabin, a combustible gas detector is arranged on the upper left side of the interior of the experimental platform cabin, a smoke temperature sensor is arranged on the upper right side of the interior of the experimental platform cabin, and installation boxes connected to the installation frame are arranged on both the left and right sides of the experimental platform cabin;

[0010] The clamping mechanism comprises a first movable base, a first pull rope is connected to the right end of the first movable base, a first winding shaft roller is arranged at the right end of the first pull rope, a second movable base is arranged on the right side of the first movable base, a second pull rope is arranged at the left end of the second movable base, a second winding shaft roller is arranged at the left end of the second pull rope, and positioning components are arranged at the upper ends of the first movable base and the second movable base.

[0011] As a further solution of the present invention: a detachable sealing door panel which is snap-connected to the mounting frame is provided on the front side of the safety protection cabin, a connecting structure is formed between the liquid nitrogen storage tank and the transfer pipeline through a connecting pipeline, and the liquid nitrogen atomizing nozzles are evenly arranged at the lower end of the transfer pipeline.

[0012] As a further solution of the present invention: an adjustment bolt is provided at the connection between the installation box and the installation frame, a ventilation hole is opened on the inner side of the outer end of the installation box, a cooling fan is provided on the inner side of the installation box, and a sealing door curtain connected to the installation frame is provided in front of the experimental platform cabin.

[0013] As a further solution of the present invention: the installation box and the installation frame are both connected to the adjustment bolt by means of threads, the installation box is arranged symmetrically about the center line of the installation frame, and the ventilation holes are evenly opened on the inner side of the outer end of the installation box and are arranged in an inclined manner.

[0014] As a further solution of the present invention: the first movable base and the first winding shaft roller are connected to the first pull rope by winding, the second movable base and the second winding shaft roller are connected to the second pull rope by winding, and the first pull rope runs through the inner side of the front and rear ends of the second movable base.

[0015] As a further solution of the present invention: the outer sides of the lower ends of the first movable base and the second movable base are both provided with limiting grooves located on the inner side of the installation frame, and the first movable base and the second movable base both form a snap-fit ​​sliding structure in the installation frame through the limiting grooves.

[0016] As a further solution of the present invention: the positioning assembly is composed of a movable disk, an adjusting rod, a movable clamping plate, a rubber pad and a fixed limiting rod;

[0017] A positioning assembly, wherein a single unit is respectively arranged at the upper end of the first movable base and the second movable base, a movable disk is arranged inside the positioning assembly, an adjusting rod is arranged at the inner end of the movable disk, a movable splint is arranged at the inner end of the adjusting rod, a rubber pad is arranged on the inner surface of the movable splint, and fixed limit rods connected to the positioning assembly are arranged on the outer sides of the upper and lower ends of the movable splint.

[0018] As a further solution of the present invention: the movable disk is connected to the adjusting rod by means of threads, and the movable disk forms a fitting rotating structure in the positioning assembly.

[0019] As a further solution of the present invention: the adjusting rod and the movable clamping plate are vertically fixedly connected, and the movable clamping plate and the rubber pad are connected by bonding.

[0020] As a further solution of the present invention: the movable splint forms a nested sliding structure in the positioning assembly through fixed limiting rods fixedly connected at upper and lower ends.

[0021] Beneficial effects of the present invention:

[0022] 1. Liquid nitrogen is intermittently injected into the experimental platform cabin through the safety protection cabin until the energy in the power battery module inside the experimental platform cabin is consumed and the danger is eliminated. The ability of continuous suppression and inerting explosion suppression can be achieved, and precise temperature control can be achieved to ensure the accuracy and repeatability of experimental data. In addition, the use of liquid nitrogen can be saved, thereby achieving both economical and efficient experimental operation. The synchronous use of the cooling mechanism can greatly reduce the temperature, save costs and protect safety. At the same time, before the experimental operation, the accurate positioning function of the clamping mechanism can be used to limit the power battery to avoid shaking and causing internal chemical reactions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a front cross-sectional structural schematic diagram of the present invention;

[0025] Figure 2 It is a side cross-sectional structural schematic diagram of the present invention;

[0026] Figure 3 It is a front cross-sectional structural schematic diagram of the connection between the installation frame and the installation box of the present invention;

[0027] Figure 4 It is a schematic diagram of a top cross-sectional structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the overall structure of the movable splint and the rubber pad connected to each other in the present invention;

[0029] Figure 6 is a system schematic diagram of the present invention;

[0030] Figure 7 It is a schematic diagram of the process of the present invention.

[0031] In the figure: 1. detection mechanism; 2. cooling mechanism; 3. clamping mechanism; 11. installation frame; 12. safety protection cabin; 13. liquid nitrogen storage tank; 14. compression refrigerator; 15. driving gas cylinder; 16. removable sealing door panel; 17. connecting pipeline; 18. transfer pipeline; 19. liquid nitrogen atomizing nozzle; 21. experimental platform cabin; 22. combustible gas detector; 23. smoke temperature sensor; 24. installation box; 25. adjustment bolt; 26. ventilation hole; 27. cooling fan; 28. sealing door curtain; 31. first movable base; 32. first pull rope; 33. first winding shaft roller; 34. second movable base; 35. second pull rope; 36. second winding shaft roller; 37. limiting slot; 38. positioning assembly; 381. movable disk; 382. adjustment rod; 383. movable splint; 384. rubber pad; 385. fixed limiting rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-7 As shown, the present invention is a new energy vehicle power battery pack testing platform.

[0034] Embodiment 1

[0035] See also Figure 1-4In the figure, the present invention provides a technical solution: a detection mechanism 1, a cooling mechanism 2 is arranged on the upper side of the interior of the detection mechanism 1, and a clamping mechanism 3 located inside the detection mechanism 1 is arranged in the middle of the cooling mechanism 2; the detection mechanism 1; comprises a mounting frame 11, a safety protection cabin 12 is arranged on the inner side of the lower end of the mounting frame 11, a liquid nitrogen storage tank 13 is arranged in the middle of the safety protection cabin 12, a compression refrigerator 14 is arranged on the left side of the liquid nitrogen storage tank 13, and a driving gas cylinder 15 is arranged on the right side of the liquid nitrogen storage tank 13, and a liquid A connecting pipe 17 is provided on the rear side of the nitrogen storage tank 13, a transfer pipe 18 connected to the mounting frame 11 is provided at the upper end of the connecting pipe 17, and a liquid nitrogen atomizing nozzle 19 is provided at the lower end of the transfer pipe 18; a cooling mechanism 2; including an experimental platform cabin 21, a combustible gas detector 22 is provided on the upper left side of the interior of the experimental platform cabin 21, a smoke temperature sensor 23 is provided on the upper right side of the interior of the experimental platform cabin 21, and installation boxes 24 connected to the mounting frame 11 are provided on both left and right sides of the experimental platform cabin 21.

[0036] A detachable sealed door panel 16 which is snap-connected to the mounting frame 11 is provided on the front side of the safety protection cabin 12. The liquid nitrogen storage tank 13 forms a connecting structure with the transfer pipeline 18 through the connecting pipeline 17. The liquid nitrogen atomizing nozzle 19 is evenly arranged at the lower end of the transfer pipeline 18. An adjusting bolt 25 is provided at the connection between the mounting box 24 and the mounting frame 11. A ventilation hole 26 is provided on the inner side of the outer end of the mounting box 24. A cooling fan 27 is provided on the inner side of the mounting box 24. A sealing door curtain 28 which is connected to the mounting frame 11 is provided in front of the experimental platform cabin 21. The mounting box 24 and the mounting frame 11 are both connected to the adjusting bolt 25 in a threaded manner. The mounting box 24 is symmetrically arranged about the center line of the mounting frame 11. The ventilation holes 26 are evenly opened on the inner side of the outer end of the mounting box 24 and are arranged in an inclined manner.

[0037] Specifically, when the new energy power battery is placed inside the installation frame 11, a series of equipment can be used to perform experimental inspections on the power battery. The combustible gas detector 22 and the smoke temperature sensor 23 can be used to monitor temperature changes in real time for remote alarm processing. When the temperature is too high and out of control, the gas cylinder 15 is driven to operate the liquid nitrogen storage tank 13, so that the gas in the liquid nitrogen storage tank 13 enters the transfer pipeline 18 along the connecting pipeline 17, and then the power battery is sprayed through the evenly arranged liquid nitrogen atomizing nozzles 19 to achieve a cooling effect. At the same time, the cooling fan 27 installed on the inside of the installation box 24 is turned on, and the external gas is sucked in from the ventilation hole 26, and then the power battery is cooled and extinguished by air to avoid thermal runaway and explosion.

[0038] Embodiment 2

[0039] See also Figure 1-Figure 5The present invention provides a technical solution: a clamping mechanism 3; comprising a first movable base 31, the right end of the first movable base 31 is connected to a first pull rope 32, the right end of the first pull rope 32 is provided with a first winding shaft roller 33, the right side of the first movable base 31 is provided with a second movable base 34, the left end of the second movable base 34 is provided with a second pull rope 35, the left end of the second pull rope 35 is provided with a second winding shaft roller 36, and the upper ends of the first movable base 31 and the second movable base 34 are both provided with a positioning assembly 38.

[0040] The first movable base 31 and the first winding shaft roller 33 are connected to the first pull rope 32 in a winding manner, and the second movable base 34 and the second winding shaft roller 36 are connected to the second pull rope 35 in a winding manner. The first pull rope 32 runs through the inner sides of the front and rear ends of the second movable base 34; the lower ends of the first movable base 31 and the second movable base 34 are both provided with a limiting groove body 37 located on the inner side of the mounting frame 11, and the first movable base 31 and the second movable base 34 are both formed into a snap-fit ​​sliding structure in the mounting frame 11 through the limiting groove body 37; the positioning assembly 38 is composed of a movable disk 381, an adjusting rod 382, ​​a movable splint 383, a rubber pad 384 and a fixed limiting rod 385; the positioning assembly 38, whose monomers are respectively arranged on the first movable base 31 and the second movable base 3 4, a movable disk 381 is arranged inside the positioning assembly 38, an adjusting rod 382 is arranged at the inner end of the movable disk 381, a movable splint 383 is arranged at the inner end of the adjusting rod 382, ​​a rubber pad 384 is arranged on the inner surface of the movable splint 383, and fixed limit rods 385 connected to the positioning assembly 38 are arranged on the outer sides of the upper and lower ends of the movable splint 383; the movable disk 381 and the adjusting rod 382 are connected by threads, and the movable disk 381 forms a fitting rotating structure in the positioning assembly 38; the adjusting rod 382 and the movable splint 383 are vertically fixedly connected, and the movable splint 383 and the rubber pad 384 are connected by bonding; the movable splint 383 forms a nested sliding structure in the positioning assembly 38 through the fixed limit rods 385 fixedly connected at the upper and lower ends.

[0041] Specifically, when the power battery is placed on the upper surface of the middle part of the mounting frame 11, since the first movable base 31 and the first winding shaft roller 33 are connected to the first pull rope 32 in a winding manner, and the second movable base 34 and the second winding shaft roller 36 are connected to the second pull rope 35 in a winding manner, the first winding shaft roller 33 and the second winding shaft roller 36 can be synchronously driven by turning on the motor to wind up the first pull rope 32 and the second pull rope 35 respectively, so that the first movable base 31 and the second movable base 34 are respectively engaged in the limiting groove 37. The movable plate 381 is connected to the adjusting rod 382 by a threaded connection. When the movable plate 381 is rotated, the movable splint 383 can slide in a nested manner in the positioning assembly 38 through the rubber pad 384, so that the rubber pad 384 bonded to the inner side of the movable splint 383 can be used to perform anti-skid clamping of the power battery, thereby avoiding the shaking of the power battery during the experimental detection due to external force, thereby achieving the effect of accurate positioning and clamping.

[0042] Embodiment 3

[0043] See also Figure 6 and Figure 7 In the invention, a technical solution is provided: the thermal runaway process of the power battery can be divided into three stages. The first stage is the latent period of thermal runaway. The battery absorbs heat and gradually heats up. After reaching the critical temperature, thermal runaway is triggered. At this time, the safety exhaust valve ruptures and releases gas; the second stage is the thermal runaway stage. The average temperature of the battery increases almost exponentially. The maximum heating rate can reach 10.7±1.2℃ / s, and the average maximum temperature is 378.9±16.8℃. The starting point of thermal runaway is that the battery temperature changes from slow rise to rapid rise. The heating rate is about 0.2℃ / s, and the corresponding temperature is about 135℃; the third stage is the post-thermal runaway stage. The heat exchange between the battery and the environment gradually reduces its temperature. When liquid nitrogen contacts the surface of the thermal runaway battery, the Leidenfrost effect is generated, forming a vapor film, which in turn hinders heat exchange. In the intermittent injection mode, the liquid nitrogen is not completely vaporized. The accumulated liquid liquid nitrogen and low-temperature nitrogen clouds continue to cool the battery during the suspension of liquid nitrogen injection, reducing the influence of the vapor film, thereby enhancing the absorption of liquid nitrogen on the heat of the battery.

[0044] There are two main schemes for intermittent injection of liquid nitrogen in experiments, which can be found according to different experimental objects and experimental requirements; Scheme 1: Through the temperature sensor on the top of the cabin and the thermocouple sensor that needs to be arranged around the test object during the experiment, when the detected temperature exceeds 260°C, it can be programmed and adjusted according to the experimental requirements to inject liquid nitrogen, and then the injection duration can be programmed and adjusted according to the experimental requirements. Scheme 2: When the protection device is manually started, the intermittent program execution can be determined. By intermittently injecting liquid nitrogen, precise control of temperature can be achieved to ensure the accuracy and repeatability of experimental data. In addition, this method can also save the use of liquid nitrogen, because intermittent injection allows the flow of liquid nitrogen to be adjusted as needed during the experiment, thereby achieving both economical and efficient experimental operation.

[0045] Specifically, start the system: before the experiment begins, turn on the power of the experimental platform cabin 21 and the safety protection cabin 12 to ensure that all equipment is in standby mode. Experiment in progress: Conduct relevant experiments on the power battery pack of new energy vehicles, and monitor the real-time data of the system at the same time. Early warning trigger: When the concentration of combustible gas reaches the preset threshold, the system automatically starts the sound and light alarm to remind the experimenter to pay attention. Protection start: If a fire occurs, the system will automatically start the liquid nitrogen release according to the preset program, or the experimenter will manually start the protection device. Smoke sensor heating sensor or combustible gas detector 22 high alarm. Automatically start when the thermocouple temperature of the experimental object reaches 260°C. Continuous monitoring: During the entire experiment, the system continuously monitors various parameters and adjusts the liquid nitrogen release strategy according to actual conditions. End of the experiment: After the experiment is completed, shut down the system, perform equipment inspection and data recording. Through this design, the present invention can provide comprehensive safety protection for new energy vehicle power battery pack experiments, and effectively prevent and suppress possible fire and explosion accidents.

[0046] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A new energy vehicle power battery pack test platform, characterized in that: It comprises a detection mechanism (1), a cooling mechanism (2) is arranged on the upper inner side of the detection mechanism (1), and a clamping mechanism (3) located inside the detection mechanism (1) is arranged in the middle of the cooling mechanism (2); The detection mechanism (1) comprises a mounting frame (11), a safety protection cabin (12) is arranged on the inner side of the lower end of the mounting frame (11), a liquid nitrogen storage tank (13) is arranged in the middle of the safety protection cabin (12), a compression refrigerator (14) is arranged on the left side of the liquid nitrogen storage tank (13), a driving gas cylinder (15) is arranged on the right side of the liquid nitrogen storage tank (13), a connecting pipeline (17) is arranged on the rear side of the liquid nitrogen storage tank (13), a transfer pipeline (18) connected to the mounting frame (11) is arranged at the upper end of the connecting pipeline (17), and a liquid nitrogen atomizing nozzle (19) is arranged at the lower end of the transfer pipeline (18); A cooling mechanism (2); comprising an experimental platform cabin (21), wherein a combustible gas detector (22) is arranged on the upper left side of the interior of the experimental platform cabin (21), a smoke temperature sensor (23) is arranged on the upper right side of the interior of the experimental platform cabin (21), and installation boxes (24) connected to the installation frame (11) are arranged on both left and right sides of the experimental platform cabin (21); The clamping mechanism (3) comprises a first movable base (31), the right end of the first movable base (31) is connected to a first pull rope (32), the right end of the first pull rope (32) is provided with a first winding shaft roller (33), the right side of the first movable base (31) is provided with a second movable base (34), the left end of the second movable base (34) is provided with a second pull rope (35), the left end of the second pull rope (35) is provided with a second winding shaft roller (36), and the upper ends of the first movable base (31) and the second movable base (34) are both provided with positioning components (38).

2. A new energy vehicle power battery pack test platform according to claim 1, characterized in that: A detachable sealing door panel (16) which is snap-connected to the mounting frame (11) is arranged at the front side of the safety protection cabin (12); a connecting pipe (17) is used to form a communication structure with the transfer pipe (18); and the liquid nitrogen atomizing nozzles (19) are evenly arranged at the lower end of the transfer pipe (18).

3. A new energy vehicle power battery pack test platform according to claim 1, characterized in that: An adjusting bolt (25) is provided at the connection between the installation box (24) and the installation frame detection mechanism (1), a ventilation hole (26) is provided on the inner side of the outer end of the installation box (24), a cooling fan (27) is provided on the inner side of the installation box (24), and a sealing door curtain (28) connected to the installation frame (11) is provided in front of the experimental platform cabin (21).

4. A new energy vehicle power battery pack test platform according to claim 3, characterized in that: The installation box (24) and the installation frame (11) are both connected to the adjustment bolt (25) by means of threads. The installation box (24) is arranged symmetrically about the center line of the installation frame (11). The ventilation holes (26) are evenly opened on the inner side of the outer end of the installation box (24) and are arranged in an inclined manner.

5. A new energy vehicle power battery pack test platform according to claim 1, characterized in that: The first movable base (31) and the first winding roller (33) are connected to the first pull rope (32) in a winding manner, and the second movable base (34) and the second winding roller (36) are connected to the second pull rope (35) in a winding manner. The first pull rope (32) passes through the inner sides of the front and rear ends of the second movable base (34).

6. A new energy vehicle power battery pack test platform according to claim 5, characterized in that: The lower outer sides of the first movable base (31) and the second movable base (34) are provided with a limiting groove body (37) located inside the mounting frame (11); the first movable base (31) and the second movable base (34) form a snap-fit ​​sliding structure inside the mounting frame (11) through the limiting groove body (37).

7. A new energy vehicle power battery pack test platform according to claim 1, characterized in that: The positioning assembly (38) is composed of a movable disk (381), an adjusting rod (382), a movable clamping plate (383), a rubber pad (384) and a fixed limiting rod (385); A positioning assembly (38), wherein the units are respectively arranged at the upper ends of the first movable base (31) and the second movable base (34); a movable disk (381) is arranged inside the positioning assembly (38); an adjusting rod (382) is arranged at the inner end of the movable disk (381); a movable splint (383) is arranged at the inner end of the adjusting rod (382); a rubber pad (384) is arranged on the inner surface of the movable splint (383); fixed limit rods (385) connected to the positioning assembly (38) are arranged on the outer sides of the upper and lower ends of the movable splint (383).

8. A new energy vehicle power battery pack test platform according to claim 7, characterized in that: The movable disk (381) and the adjusting rod (382) are connected by means of threads, and the movable disk (381) forms a fitting rotating structure in the positioning assembly (38).

9. A new energy vehicle power battery pack test platform according to claim 7, characterized in that: The adjusting rod (382) and the movable clamping plate (383) are vertically fixedly connected, and the movable clamping plate (383) and the rubber pad (384) are connected by bonding.

10. A new energy vehicle power battery pack test platform according to claim 7, characterized in that: The movable clamping plate (383) forms a nested sliding structure in the positioning assembly (38) through a fixed limiting rod (385) fixedly connected at the upper and lower ends.

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