A battery pack puncture test device

Abstract

This invention relates to the field of battery safety testing and discloses a battery pack needle penetration testing device, including a testing platform, a needle assembly, a needle driving assembly, a clamping assembly, and a fire-fighting pipe. The needle assembly, needle driving assembly, clamping assembly, and fire-fighting pipe are all mounted on the testing platform. The testing platform has a working chamber for accommodating the battery pack, with an open top. The needle assembly includes needles, the needle driving assembly drives the needles to move towards or away from the battery pack, the clamping assembly clamps the battery pack, and the outlet end of the fire-fighting pipe faces the working chamber, while the inlet end is connected to a water supply pipe. This battery pack needle penetration testing device can achieve rapid fire extinguishing by immersing the battery in water after it catches fire, improving operational safety and shortening extinguishing time.

Description

Technical Field

[0001] The present invention relates to the field of battery safety testing, and in particular to a battery pack puncture test device. Background Art

[0002] The safety of lithium-ion batteries depends on many factors, including the material system, design level, production control, and battery usage. Internal short circuits pose a significant threat to batteries. A needle penetration thermal diffusion test is typically used to simulate the safety conditions associated with an internal short circuit. This test involves piercing the battery pack with a steel needle at a constant speed. During this test, thermal runaway of the battery pack often occurs, initially producing a large amount of white smoke. When the heat generated exceeds the system's heat dissipation efficiency, a fire quickly breaks out. Spraying the battery pack from the periphery with fire hoses alone is insufficient to extinguish the fire quickly; continuous spraying takes an average of one hour. Due to the prolonged firefighting process, the battery pack generates significant smoke during thermal runaway, often overloading the exhaust gas treatment system and shortening the filter lifespan. Furthermore, the spraying process requires continuous firefighting by firefighters, increasing manpower consumption. More importantly, the battery pack thermal runaway presents the potential for explosion, posing a threat to the safety of firefighters. Summary of the Invention

[0003] The purpose of the present invention is to provide a battery pack needle penetration test device, which can achieve the purpose of quickly extinguishing the fire by soaking the battery in water after it catches fire, which not only improves the operational safety but also shortens the fire extinguishing time.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A battery pack puncture test device is used to perform a puncture test on a battery pack. The battery pack puncture test device includes a test platform, a puncture needle assembly, a puncture needle drive assembly, a clamping assembly and a fire hose. The puncture needle assembly, the puncture needle drive assembly, the clamping assembly and the fire hose are all arranged on the test platform. The test platform is provided with a working chamber for accommodating the battery pack, and the top of the working chamber is open. The puncture needle assembly includes a puncture needle, and the puncture needle drive assembly is used to drive the puncture needle to move toward or away from the battery pack. The clamping assembly is used to compress the battery pack. The outlet end of the fire hose faces the working chamber, and the inlet end of the fire hose is used to be connected to a water supply pipe.

[0006] Preferably, the battery pack puncture test device further includes a drain pipe, which is arranged on the test platform and communicated with the working chamber, and a switch valve is provided on the drain pipe.

[0007] Preferably, the test platform includes a base plate, a front side plate, a rear side plate, a left side plate, a right side plate and supporting feet. The base plate, the front side plate, the rear side plate, the left side plate and the right side plate enclose the working chamber, and the supporting feet are arranged at the bottom of the base plate.

[0008] Preferably, the clamping assembly includes a cross bar, a support back plate, a first slider assembly and a second slider assembly, and the first slider assemblies are respectively provided at both ends of the cross bar, one of the first slider assemblies is slidably connected to the left plate, and the other first slider assembly is slidably connected to the right plate, and the support back plate is arranged in the working chamber, and the support back plate is slidably connected to the cross bar through the second slider assembly.

[0009] Preferably, a puncture hole connected to the working chamber is provided on the test platform, and the puncture needle assembly also includes a guide mechanism, which covers the puncture hole and is sealed with the test platform. The puncture needle is slidably arranged in the guide mechanism, and the puncture needle drive assembly is used to drive the puncture needle to slide along the guide mechanism and pass through the puncture hole to puncture the battery pack.

[0010] Preferably, the test platform also includes a transparent high-temperature resistant panel, the test platform is provided with an observation window, the transparent high-temperature resistant panel covers the observation window, and can slide back and forth and up and down relative to the test platform, the puncture hole is arranged on the transparent high-temperature resistant panel, the guide mechanism is sealed and connected to the transparent high-temperature resistant panel, the guide mechanism is slidably connected to the test platform, and can slide up and down and back and forth relative to the test platform, the needle drive assembly includes a first mounting bracket, a driving member and a push block, the first mounting bracket is slidably mounted on the test platform, the driving member is mounted on the first mounting bracket, the push block is arranged at the output end of the driving member, and the forward and backward sliding range of the guide mechanism falls within the longitudinal width range of the push block.

[0011] Preferably, the test platform also includes a limit plate and an adjusting member, the test platform is recessed to form a mounting groove adapted to the limit plate, the mounting groove is communicated with the observation window, and the limit plate is provided with a first sliding groove, a through groove and a mounting hole, the first sliding groove vertically penetrates the limit plate, the through groove penetrates the limit plate horizontally, the through groove is arranged corresponding to the observation window, and there are at least two mounting holes, two or more mounting holes are arranged on the side of the limit plate away from the observation window, and are respectively communicated with the first sliding groove, the transparent high-temperature resistant panel is slidably arranged in the first sliding groove, and there are at least two adjusting members, one of the adjusting members passes through one mounting hole and abuts against the transparent high-temperature resistant panel.

[0012] Preferably, the needle drive assembly further comprises a base and a fastener, the base is mounted on the test platform and is located outside the observation window, the base is provided with a plurality of second adjustment holes in the up and down directions, and the first mounting bracket is connected to the base via the fastener.

[0013] Preferably, the guide mechanism includes a catheter, a first elastic member, a push rod, a first plug and a second plug, the second end of the catheter is provided with an annular protrusion, the first plug is installed at the first end of the catheter, the second plug is installed at the second end of the catheter, the end of the second plug facing away from the catheter is installed in the puncture hole, the push rod is arranged in the catheter and extends out of the catheter through the first plug, the puncture needle is arranged in the catheter and extends out of the catheter through the second plug, the first elastic member is sleeved on the puncture needle, and the first elastic member is elastically compressed between the push rod and the second plug, and the heat-resistant sealing ring is arranged between the transparent high-temperature resistant panel and the annular protrusion.

[0014] Preferably, the limiting plate is provided with a second sliding groove, and the puncture needle assembly further includes a second mounting bracket and a second elastic member, the second mounting bracket is arranged in a cross shape, the second mounting bracket includes a main body, a first bending portion and a second bending portion, the main body is provided with a guide groove, the first bending portion and the second bending portion are respectively arranged on both sides of the bottom of the main body, the first bending portion and the second bending portion are respectively arranged in the second sliding groove, the catheter is installed in the guide groove, the second elastic member is elastically compressed between the main body and the annular protrusion, the second mounting bracket can slide up and down along the second sliding groove, and the catheter can slide back and forth along the guide groove.

[0015] The battery pack puncture test device provided by the present invention forms a working chamber on the test platform that is open at the top and sealed in other directions, and a fire hose is provided on the test platform. When testing the battery pack, the inlet end of the fire hose is first connected to the water supply pipe, and then the battery pack is tested. If the battery pack suffers from thermal runaway during the test, the water supply device is immediately opened to pour water into the working chamber. By soaking the battery pack that has thermally runaway by pouring water, the fire extinguishing time can be shortened, and the purpose of rapid fire extinguishing and reducing smoke pollution can be achieved, while the waste of fire water can be reduced. In addition, the use of this fire extinguishing method does not require the tester to approach the battery pack to extinguish the fire, and the safety of the tester is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 2 is a schematic structural diagram of a battery pack puncture test device provided by an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A magnified view of middle A;

[0019] Figure 3 This is a schematic structural diagram of the battery pack puncture test device provided by an embodiment of the present invention from another direction;

[0020] Figure 4 yes Figure 3 Enlarged view of middle B;

[0021] Figure 5 yes Figure 3 Cross-section along line CC;

[0022] Figure 6 Yes Figure 5 Enlarged view of middle D;

[0023] Figure 7 is a schematic diagram of the combination of the crossbar, the second slider assembly and the fine-tuning mechanism provided by an embodiment of the present invention;

[0024] Figure 8 It is a structural schematic diagram of a second mounting bracket provided in an embodiment of the present invention.

[0025] Description of Figure Numbers:

[0026] 10. Test platform; 11. Working chamber; 12. Bottom plate; 13. Front side panel; 14. Rear side panel; 15. Left side panel; 151. First protrusion; 16. Right side panel; 17. Support foot; 18. Transparent high-temperature resistant panel; 181. Puncture hole; 19. Observation window; 101. Limit plate; 102. First sliding slot; 103. Through slot; 104. Mounting hole; 105. Second sliding slot; 106. Adjustment member; 107. Press plate;

[0027] 20. Needle assembly; 21. Needle; 22. Guide mechanism; 221. Catheter; 2211. Annular protrusion; 222. First elastic member; 223. Push rod; 224. First plug; 225. Second plug; 23. Heat-resistant sealing ring; 24. Second mounting bracket; 241. Body; 2411. Guide groove; 242. First bending portion; 243. Second bending portion; 25. Second elastic member; 26. Gasket;

[0028] 30. Needle drive assembly; 31. First mounting bracket; 32. Drive member; 33. Push block; 34. Base; 35. Fastener; 36. Second adjustment hole;

[0029] 40. Clamping assembly; 41. Crossbar; 411. First adjustment hole; 42. Support back plate; 43. First slider assembly; 431. First slider; 432. Second slider; 433. Clamping top plate; 434. Adjusting bolt; 435. Connector; 44. Second slider assembly; 441. Third slider; 442. Fixing bolt; 443. Nut; 45. Fine-tuning mechanism; 451. Guide rail seat; 452. Screw; 453. Screw mounting block;

[0030] 50. Fire hose;

[0031] 60. Drain pipe;

[0032] 70. Switch valve. DETAILED DESCRIPTION

[0033] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0036] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] like Figures 1 to 8 As shown in FIG, a battery pack needle penetration test device according to an embodiment of the present invention is used to perform needle penetration tests on battery packs. The X direction is the left in the left-right direction, the Y direction is the front in the front-back direction, and the Z direction is the top in the up-down direction.

[0038] See also Figures 1-8 As shown, a battery pack puncture test device according to an embodiment of the present invention includes a test platform 10, a puncture needle assembly 20, a puncture needle drive assembly 30, a clamping assembly 40 and a fire hose 50. The puncture needle assembly 20, the puncture needle drive assembly 30, the clamping assembly 40 and the fire hose 50 are all arranged on the test platform 10. The test platform 10 is provided with a working chamber 11 for accommodating the battery pack. The top of the working chamber 11 is open. The puncture needle assembly 20 includes a puncture needle 21. The puncture needle drive assembly 30 is used to drive the puncture needle 21 to move toward or away from the battery pack. The clamping assembly 40 is used to clamp the battery pack to prevent the battery pack from moving during the test. The outlet end of the fire hose 50 faces the working chamber 11, and the inlet end of the fire hose 50 is connected to the water supply pipe.

[0039] It should be noted that the puncture needle assembly 20 can be set at any position of the left side, right side, front side, rear side, top and bottom of the test platform 10. The puncture needle assembly 20 can be fixedly connected to the test platform 10, or can be set to a detachable connection. When the puncture needle assembly 20 is set on the left or right side of the test platform 10, the clamping assembly 40 can clamp the battery pack from the left or right side. When the puncture needle assembly 20 is set on the front or rear side of the test platform 10, the clamping assembly 40 can clamp the battery pack from the front or rear. When the puncture needle assembly 20 is set at the top or bottom of the test platform 10, the clamping assembly 40 can clamp the battery pack from the top.

[0040] The battery pack puncture test device of the embodiment of the present invention forms a working chamber 11 on the test platform 10, which is sealed in all directions except the top, and a fire hose 50 is provided on the test platform 10. When testing the battery pack, the inlet end of the fire hose 50 is first connected to the water pipe (at this time, the water supply device connected to the water pipe is closed), and then the battery pack is tested. If the battery pack has thermal runaway during the test, the water supply device is immediately opened to pour water into the working chamber 11. Soaking the battery pack that has thermally runaway by pouring water can shorten the fire extinguishing time, achieve the purpose of rapid fire extinguishing and reduce smoke pollution, and at the same time reduce the waste of fire water. In addition, this fire extinguishing method does not require the tester to approach the battery pack to extinguish the fire, and the safety of the tester is guaranteed.

[0041] Furthermore, the battery pack puncture test device also includes a drain pipe 60, which is arranged on the test platform 10 and connected to the working chamber 11. A switch valve 70 is provided on the drain pipe 60. After the fire extinguishing purpose is completed, the water in the working chamber 11 can be discharged through the drain pipe 60.

[0042] Optionally, the drain pipe 60 is disposed at the bottom of the working chamber 11 , or may be disposed at the lower portion of the working chamber 11 .

[0043] See also Figures 1-8 As shown, exemplarily, in some embodiments, the test platform 10 includes a base plate 12, a front side plate 13, a rear side plate 14, a left side plate 15, a right side plate 16 and a support leg 17. The base plate 12, the front side plate 13, the rear side plate 14, the left side plate 15, and the right side plate 16 enclose a working chamber 11, and the support leg 17 is arranged at the bottom of the base plate 12.

[0044] See also Figures 1-8 As shown, in one embodiment, the lancet assembly 20 is disposed on the left side of the test platform 10 , that is, the lancet assembly 20 is disposed on the left side plate 15 .

[0045] The clamping assembly 40 includes a cross bar 41, a support back plate 42, a first slider assembly 43 and a second slider assembly 44. The above-mentioned first slider assemblies 43 are respectively provided at both ends of the cross bar 41, one of the first slider assemblies 43 is slidably connected to the left side plate 15, and the other first slider assembly 43 is slidably connected to the right side plate 16. The support back plate 42 is arranged in the working chamber 11, and the support back plate 42 is slidably connected to the cross bar 41 through the second slider assembly 44. When conducting a test, first adjust the support back plate 42 from the front and rear directions so that the support back plate 42 falls into the longitudinal range of the battery pack, and then adjust the lateral distance between the support back plate 42 and the battery pack by sliding from the left and right directions until the support back plate 42 fits the battery pack, thereby fixing the battery pack to prevent the battery pack from moving laterally during the test. The clamping assembly 40 has a simple structure and is easy to operate.

[0046] It can be understood that in order to better fix the battery pack, two groups of clamping assemblies 40 can be provided, and the two groups of clamping assemblies 40 are spaced apart along the front-to-back direction of the test platform 10.

[0047] Optionally, a first protrusion 151 is provided on the top of the left side plate 15 and the top of the right side plate 16. The following is explained by taking the connection between the first slider assembly 43 and the left side plate 15 as an example. The connection relationship between the second slider assembly 44 and the right side plate 16 is the same and will not be repeated here.

[0048] Optionally, the first slider assembly 43 includes a first slider 431, a second slider 432, a pressing top plate 433, an adjusting bolt 434 and a connecting piece 435. The first slider 431 is set in an L-shape, and the second slider 432 is set in an inverted L-shape. A threaded hole is set at the bottom of the first slider 431, and the adjusting bolt 434 passes through the threaded hole and is connected to the pressing top plate 433. The first slider 431 is sleeved on the cross bar 41 and is located on the outside of the left side plate 15. The pressing top plate 433 abuts against the first protrusion 151. The second slider 432 is sleeved on the cross bar 41 and located on the inner side of the left side plate 15. The first slider 431 and the second slider 432 are connected by a connecting piece 435. When adjusting, first loosen the adjusting bolt 434 to make the pressing top plate 433 leave the first protrusion 151, move the longitudinal position of the cross bar 41, and after moving into place, tighten the adjusting bolt 434 to make the pressing top plate 433 press against the first protrusion 151 to prevent the first slider assembly 43 from moving. The first slider assembly 43 has a simple structure and is easy to adjust.

[0049] Optionally, the second slider assembly 44 includes a third slider 441, a fixing bolt 442 and a nut 443. The cross bar 41 is longitudinally penetrated with a first adjustment hole 411, and the third slider 441 is longitudinally penetrated with a connecting hole. The third slider 441 is sleeved on the cross bar 41, and the fixing bolt 442 passes through the connecting hole and the first adjustment hole 411 and is connected to the nut 443. When adjusting, first loosen the nut 443, take out the fixing bolt 442, move the third slider 441 into place, and then install the fixing bolt 442 and nut 443 to prevent the second slider assembly 44 from moving. The second slider assembly 44 has a simple structure and is easy to adjust.

[0050] It is understandable that the first slider assembly 43 may also adopt other sliding structures, as long as it can drive the crossbar 41 to slide back and forth relative to the test platform 10 and be fixed to the test platform 10 after sliding into place. Similarly, the second slider assembly 44 may also adopt other sliding structures, as long as it can enable the support backboard 42 to slide left and right relative to the crossbar 41 and be fixed to the crossbar 41 after sliding into place.

[0051] It can be understood that when the lancet assembly 20 is disposed at the top or bottom of the lancet assembly 20 , the pressing assembly 40 includes a baffle that can slide along the up and down directions of the test platform 10 .

[0052] See also Figures 1-8 As shown, exemplarily, in some embodiments, the clamping assembly 40 also includes a fine-tuning mechanism 45, the fine-tuning mechanism 45 includes a guide rail seat 451, a screw rod 452 and a screw rod mounting block 453, the guide rail seat 451 is installed on the cross bar 41, one end of the screw rod 452 is installed on the screw rod mounting block 453, and the other end passes through the guide rail seat 451 and is rotatably connected to the first slider 431, the guide rail seat 451 is threadedly connected to the screw rod 452, and rotating the screw rod 452 can enable the guide rail seat 451 to drive the support back plate 42 installed on the cross bar 41 to slide left and right along the test platform 10, thereby achieving the purpose of fine-tuning the distance between the battery pack and the needle 21.

[0053] It is understandable that the lancet assembly 20 and the lancet drive assembly 30 are both disposed within the working chamber 11, or they may be disposed outside the working chamber 11. If both the lancet assembly 20 and the lancet drive assembly 30 are disposed outside the working chamber 11, the lancet assembly 20 and the test platform 10 need to be sealed. The following description will take the case where both the lancet assembly 20 and the lancet drive assembly 30 are disposed outside the working chamber 11 as an example.

[0054] See also Figures 1-8 As shown, exemplarily, in some embodiments, a puncture hole 181 communicating with the working chamber 11 is provided on the test platform 10, and the puncture needle assembly 20 further includes a guide mechanism 22, which covers the puncture hole 181 and is sealed with the test platform 10, and the puncture needle 21 is slidably arranged in the guide mechanism 22, and the puncture needle drive assembly 30 is used to drive the puncture needle 21 to slide along the guide mechanism 22 and pass through the puncture hole 181 to puncture the battery pack, that is, the guide mechanism 22 and the puncture needle drive assembly 30 are both arranged on the outside of the working chamber 11. This design can minimize the area of ​​the working chamber 11 accommodating the battery pack. When the battery pack catches fire and water is poured into the working chamber 11, the amount of water used can be reduced, saving resources.

[0055] Optionally, at least two puncture holes 181 are provided, the guide mechanism 22 covers one of the puncture holes, and a sealing plug is provided in the remaining puncture hole 181, so that the needle assembly 20 can be installed in different positions according to the puncture position of the battery pack.

[0056] See also Figures 1-8As shown, exemplarily, in some embodiments, the test platform 10 also includes a transparent high-temperature resistant panel 18, the test platform 10 is provided with an observation window 19, the transparent high-temperature resistant panel 18 covers the observation window 19, and can slide back and forth and up and down relative to the test platform 10, the above-mentioned puncture hole 181 is provided on the transparent high-temperature resistant panel 18, the guide mechanism 22 is sealedly connected to the transparent high-temperature resistant panel 18, the guide mechanism 22 is slidably connected to the test platform 10, and can slide up and down and back and forth relative to the test platform 10, the needle drive assembly 30 includes a first mounting bracket 31, a driving member 32 and a push block 33, the first mounting bracket 31 is slidably mounted on the test platform 10, the driving member 32 is mounted on the first mounting bracket 31, the push block 33 is arranged at the output end of the driving member 32, the forward and backward sliding range of the guide mechanism 22 falls within the longitudinal width range of the push block 33, with this design, the puncture position of the battery pack can be intuitively seen, so that the position of the needle 21 can be adjusted according to the puncture position of the battery pack.

[0057] Furthermore, the test platform 10 also includes a limit plate 101 and an adjusting member 106. The test platform 10 is recessed to form a mounting groove (not shown) adapted to the limit plate 101. The mounting groove is communicated with the observation window 19. The limit plate 101 is provided with a first sliding groove 102, a through groove 103 and a mounting hole 104. The first sliding groove 102 vertically penetrates the limit plate 101, and the through groove 103 horizontally penetrates the limit plate 101. The through groove 103 is arranged corresponding to the observation window 19. There are at least two mounting holes 104, and two or more mounting holes 104 are arranged on the limit plate 101. The plate 101 is on the side away from the observation window 19 and is connected to the first sliding groove 102 respectively. The transparent high-temperature resistant panel 18 is slidably set in the first sliding groove 102. There are at least two adjusting members 106. One adjusting member 106 passes through a mounting hole 104 and abuts against the transparent high-temperature resistant panel 18. When in use, first loosen the adjusting member 106, slide the transparent high-temperature resistant panel 18 to the required position, make the puncture hole 181 correspond to the puncture position of the battery pack, and then tighten the adjusting member 106 to complete the fixation of the transparent high-temperature resistant panel 18. The adjustment method is simple and reliable. The adjusting member 106 can select a suitable mounting hole 104 for installation, and after the transparent high-temperature resistant panel 18 slides, the suitable mounting hole 104 can be selected for installation again according to the position of the transparent high-temperature resistant panel 18 relative to the limit plate 101.

[0058] Optionally, the limiting plate 101 is provided with two rows of mounting holes 104 in the horizontal direction and two rows of mounting holes 104 in the vertical direction, so that the position of the adjusting member 106 can be adjusted within a wide range to better fix the transparent high temperature resistant panel 18 .

[0059] Optionally, the transparent high-temperature resistant panel 18 is a high-temperature resistant glass panel.

[0060] Optionally, the adjusting member 106 is a screw or a bolt.

[0061] Further, in order to improve the sealing performance between the transparent high-temperature resistant panel 18 and the observation window 19, the test platform 10 further includes two pressing plates 107. The pressing plates 107 are in a square shape with a hole in the middle. The two pressing plates 107 are respectively arranged on both sides of the transparent high-temperature resistant panel 18. An adjusting member 106 passes through an installation hole 104 and abuts against the pressing plate 107. By arranging the pressing plate 107 to squeeze and fix the transparent high-temperature resistant panel 18, the sealing performance can be improved.

[0062] Further, the stabbing needle driving assembly 30 further includes a base 34 and a fastener 35. The base 34 is installed on the test platform 10 and is located outside the observation window 19. The base 34 is provided with a plurality of second adjusting holes 36 in the up-and-down direction. The first mounting bracket 31 is connected to the base 34 through the fastener 35. When adjusting the up-and-down position of the driving member 32, loosen the fastener 35, move the first mounting bracket 31 to the corresponding position, and then tighten the fastener 35 again.

[0063] Optionally, in order to make the first mounting bracket 31 receive more uniform force, the first mounting bracket 31 is arranged in a U shape. Bases 34 are arranged on both sides of the observation window 19, and the first mounting bracket 31 is installed on the bases 34 across the observation window 19.

[0064] Optionally, the fastener 35 is a bolt.

[0065] Optionally, the driving member 32 can be an electric cylinder, and the driving method is simple and reliable, which is convenient for control.

[0066] Please refer to Figures 1-8 As shown, exemplarily, in some embodiments, the stabbing needle assembly 20 further includes a heat-resistant sealing ring 23. The guiding mechanism 22 includes a catheter 221, a first elastic member 222, a push rod 223, a first plug 224 and a second plug 225. The second end of the catheter 221 is provided with an annular protrusion 2211. The first plug 224 is installed at the first end of the catheter 221, and the second plug 225 is installed at the second end of the catheter 221. The end of the second plug 225 facing away from the catheter 221 is installed in the puncture hole. The push rod 223 is arranged in the catheter 221 and extends out of the catheter 221 through the first plug 224. The stabbing needle 21 is arranged in the catheter 221 and extends out of the catheter 221 through the second plug 225. The first elastic member 222 is sleeved on the stabbing needle 21, and the first elastic member 222 is elastically compressed between the push rod 223 and the second plug 225. The heat-resistant sealing ring 23 is arranged between the transparent high-temperature resistant panel 18 and the annular protrusion 2211. With this design, the stabbing needle assembly 20 does not need to have a direct connection relationship with the stabbing needle driving assembly 30, which is more convenient when selecting different types of stabbing needles 21 (such as conical, flat) according to experimental requirements. Moreover, by arranging the first elastic member 222, the stabbing needle 21 can automatically reset after the test is completed.

[0067] Optionally, the heat-resistant sealing ring 23 is made of heat-resistant rubber.

[0068] Furthermore, the second plug 225 is detachably connected to the catheter 221, and the second plug 225 is provided with a perforation adapted to the puncture needle 21. With this design, when the puncture needle 21 needs to be replaced, only the puncture needle 21 and the second plug 225 need to be replaced, without replacing the entire puncture needle assembly 20.

[0069] Furthermore, in order to enable the guide mechanism 22 to be firmly fixed on the transparent high-temperature resistant panel 18 during testing, the limiting plate 101 is provided with a second sliding groove 105, and the needle assembly 20 also includes a second mounting bracket 24 and a second elastic member 25. The second mounting bracket 24 is arranged in a five-character shape, and the second mounting bracket 24 includes a main body 241, a first bending portion 242 and a second bending portion 243. The main body 241 is provided with a guide groove 2411, and the first bending portion 242 and the second bending portion 243 are respectively arranged on both sides of the bottom of the main body 241. The first bending portion 242 and the second bending portion 243 are respectively arranged in the second sliding groove 105, and the catheter 221 is installed in the guide groove 2411. The second elastic member 25 is elastically compressed between the main body 241 and the annular protrusion 2211. The second mounting bracket 24 can slide up and down along the second sliding groove 105, and the guide mechanism 22 can slide back and forth along the guide groove 2411. The sliding method is simple and reliable and easy to operate.

[0070] Optionally, in order to reduce the wear of the second mounting bracket 24 caused by the friction between the second elastic member 25 and the second mounting bracket 24 during the forward and backward sliding of the guide mechanism 22 , a gasket 26 is provided between the second elastic member 25 and the body 241 .

[0071] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery pack puncture test device, used for performing a puncture test on a battery pack, characterized in that: The battery pack puncture test device includes a test platform, a puncture needle assembly, a puncture needle drive assembly, a clamping assembly and a fire hose, wherein the puncture needle assembly, the puncture needle drive assembly, the clamping assembly and the fire hose are all arranged on the test platform, the test platform is provided with a working chamber for accommodating the battery pack, the top of the working chamber is open, the puncture needle assembly includes a puncture needle, the puncture needle drive assembly is used to drive the puncture needle to move toward or away from the battery pack, the clamping assembly is used to clamp the battery pack, the outlet end of the fire hose faces the working chamber, and the inlet end of the fire hose is used to connect with a water pipe; a puncture hole connected with the working chamber is provided on the test platform, the puncture needle assembly also includes a guide mechanism, the guide mechanism covers the puncture hole and is sealed and connected with the test platform, The puncture needle is slidably arranged in the guide mechanism, and the puncture needle driving assembly is used to drive the puncture needle to slide along the guide mechanism and pass through the puncture hole to puncture the battery pack; the guide mechanism includes a catheter, a first elastic member, a push rod, a first plug and a second plug, the second end of the catheter is provided with an annular protrusion, the first plug is installed at the first end of the catheter, the second plug is installed at the second end of the catheter, and the end of the second plug away from the catheter is installed in the puncture hole, the push rod is arranged in the catheter, and passes through the first plug to extend out of the catheter, the puncture needle is arranged in the catheter, and passes through the second plug to extend out of the catheter, the first elastic member is sleeved on the puncture needle, and the first elastic member is elastically compressed between the push rod and the second plug.

2. The battery pack puncture test device according to claim 1, characterized in that: It also includes a drain pipe, which is arranged on the test platform and communicated with the working chamber, and a switch valve is arranged on the drain pipe.

3. The battery pack puncture test device according to claim 1, characterized in that: The test platform includes a bottom plate, a front side plate, a rear side plate, a left side plate, a right side plate and supporting feet. The bottom plate, the front side plate, the rear side plate, the left side plate and the right side plate enclose the working chamber, and the supporting feet are arranged at the bottom of the bottom plate.

4. The battery pack puncture test device according to claim 3, characterized in that: The clamping assembly includes a cross bar, a support back plate, a first slider assembly and a second slider assembly. The first slider assemblies are respectively provided at both ends of the cross bar, one of the first slider assemblies is slidably connected to the left plate, and the other first slider assembly is slidably connected to the right plate. The support back plate is arranged in the working chamber, and the support back plate is slidably connected to the cross bar through the second slider assembly.

5. The battery pack puncture test device according to claim 1, characterized in that: The test platform also includes a transparent high-temperature resistant panel, which is provided with an observation window. The transparent high-temperature resistant panel covers the observation window and can slide forward and backward and up and down relative to the test platform. The puncture hole is arranged on the transparent high-temperature resistant panel. The guide mechanism is sealed and connected to the transparent high-temperature resistant panel. The guide mechanism is slidably connected to the test platform and can slide up and down and forward and backward relative to the test platform. The puncture needle drive assembly includes a first mounting bracket, a driving member and a push block. The first mounting bracket is slidably mounted on the test platform, the driving member is mounted on the first mounting bracket, and the push block is arranged at the output end of the driving member. The forward and backward sliding range of the guide mechanism falls within the longitudinal width range of the push block.

6. The battery pack puncture test device according to claim 5, characterized in that: The test platform also includes a limit plate and an adjusting member. The test platform is recessed to form an installation groove that is adapted to the limit plate. The installation groove is communicated with the observation window. The limit plate is provided with a first sliding groove, a through groove and a mounting hole. The first sliding groove vertically penetrates the limit plate, and the through groove penetrates the limit plate horizontally. The through groove is arranged corresponding to the observation window. There are at least two mounting holes. Two or more mounting holes are arranged on the side of the limit plate away from the observation window and are respectively communicated with the first sliding groove. The transparent high-temperature resistant panel is slidably arranged in the first sliding groove. There are at least two adjusting members, and one adjusting member passes through one mounting hole and abuts against the transparent high-temperature resistant panel.

7. The battery pack puncture test device according to claim 6, characterized in that: The needle drive assembly also includes a base and a fastener. The base is installed on the test platform and located outside the observation window. The base is provided with a plurality of second adjustment holes along the up and down directions. The first mounting bracket is connected to the base through the fastener.

8. The battery pack puncture test device according to claim 6, characterized in that: The puncture needle assembly also includes a heat-resistant sealing ring, which is arranged between the transparent high-temperature resistant panel and the annular protrusion.

9. The battery pack puncture test device according to claim 8, characterized in that: The limiting plate is provided with a second sliding groove, and the puncture needle assembly also includes a second mounting bracket and a second elastic member. The second mounting bracket is arranged in a "J" shape, and the second mounting bracket includes a main body, a first bending portion and a second bending portion. The main body is provided with a guide groove, and the first bending portion and the second bending portion are respectively arranged on both sides of the bottom of the main body, and the first bending portion and the second bending portion are respectively arranged in the second sliding groove, and the catheter is installed in the guide groove, and the second elastic member is elastically compressed between the main body and the annular protrusion, and the second mounting bracket can slide up and down along the second sliding groove, and the catheter can slide forward and backward along the guide groove.

Images