Battery pack compression test device

Abstract

The present invention discloses a battery pack extrusion test device, comprising a battery pack and a base plate, and also comprising an extrusion mechanism, a closing mechanism, a synchronization mechanism, and a blocking mechanism; the battery pack is slidably mounted on the top of the synchronization mechanism, the bottom of the synchronization mechanism is mounted on the top of the base plate, the closing mechanism is symmetrically arranged on the left and right sides of the synchronization mechanism, and the synchronization mechanism drives the closing mechanisms on both sides to synchronously approach or move away from the battery pack; the extrusion mechanism is symmetrically arranged on the front and rear sides of the battery pack, and blocking mechanisms are mounted on the bottoms of the extrusion mechanisms at both ends, and the blocking mechanisms control the extrusion mechanisms on both sides to synchronously approach or move away from the battery pack.

Description

Technical Field

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

[0002] In order to simulate the situation after the battery pack is squeezed and deformed after a car collision. When squeezing the battery pack, it is necessary to place the battery pack between the two squeezing blocks of the squeezing mechanism, and then drive the two squeezing blocks to squeeze the battery pack. After the battery pack is deformed during squeezing, there is a probability that a sudden combustion and explosion will occur. There is more air in the test room, which can support the entire process of complete combustion of the battery, and the dust generated after the battery pack burns will permeate the entire test room, which will be difficult to clean later. The burning of the battery pack will cause certain harm to the squeezing mechanism. For this reason, it is necessary to set up a battery pack extrusion test device that can reduce the degree of explosion when the battery pack burns by reducing the contact of the battery pack with the air when the battery pack burns, and can minimize the dust from drifting throughout the entire detection device.

[0003] Chinese invention patent CN115774198B discloses a power battery extrusion test device, including a bidirectional extruder, a support platform, two explosion-proof boxes and two linear push mechanisms, the support platform is located between the two extrusion blocks, and the two explosion-proof boxes are respectively located on both sides of the bidirectional extruder in the longitudinal direction. When the power battery burns during the extrusion process, the power battery extrusion test device pushes the explosion-proof box to cover the power battery through the linear push mechanism to reduce the contact between air and the power battery; when the power battery burns during the static process, the closed gate can close the avoidance groove to reduce the air entering the explosion-proof box, and the closed gate adopts a purely mechanical structure to increase the service life of the closed gate and reduce the dwell time required for electrical control. However, the bidirectional extruder, the support platform, the two explosion-proof boxes and the two linear push mechanisms in the invention respectively adopt different drive mechanisms, the control structure is complex, and the operation is difficult.

[0004] Therefore, a battery pack extrusion test device is proposed to remove the supporting platform and the linear push mechanism while achieving extrusion and explosion protection. Summary of the invention

[0005] The purpose of the present invention is to provide a battery pack extrusion test device to solve the technical problems of the existing power battery extrusion test device having a complex control structure and high operating difficulty.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a battery pack extrusion test device, comprising a battery pack and a base plate, and also comprising an extrusion mechanism, a closing mechanism, a synchronization mechanism, and a blocking mechanism; the battery pack is slidably installed on the top of the synchronization mechanism, the bottom of the synchronization mechanism is installed on the top of the base plate, the closing mechanism is symmetrically arranged on the left and right sides of the synchronization mechanism, and the synchronization mechanism drives the closing mechanisms on both sides to synchronously approach or move away from the battery pack; the extrusion mechanism is symmetrically arranged on the front and back sides of the battery pack, and blocking mechanisms are installed at the bottom of the extrusion mechanisms at both ends, and the blocking mechanisms control the extrusion mechanisms on both sides to synchronously approach or move away from the battery pack.

[0007] Furthermore, the closing mechanism includes a closing block, an avoidance groove, a closing groove, a transverse sliding groove and a transverse sliding block; a side of the closing block close to the battery pack is provided with an avoidance groove, and the front and rear sides of the avoidance groove pass through the closing block, the avoidance groove is used to accommodate the battery pack and avoid the extrusion mechanism, the bottom of the closing block is provided with the closing groove, the closing groove is connected to the avoidance groove, the closing groove is used to slide and adapt to the synchronization mechanism, and the closing block is slidably adapted to the top of the bottom plate through the transverse sliding groove and the transverse sliding block.

[0008] Furthermore, the synchronization mechanism includes a fixed plate, a rack, a center wheel, a synchronization groove and a center shaft; the fixed plate is installed in the middle of the top of the bottom plate, a through hole is opened in the middle of the fixed plate, the center shaft is rotatably connected in the middle of the through hole, the center wheel is fixedly connected to the outside of the center shaft, the racks are symmetrically installed at both ends of the center wheel, the sides of the racks on both sides away from each other are slidably set on the side walls of the through hole, one end of the rack is fixedly connected to the bottom wall of the closed groove on one side, and a synchronization groove is opened on the bottom wall of the closed groove on the other side corresponding to the rack; when the center shaft rotates, the racks on both sides move under the action of the center wheel, and the closed blocks on both sides synchronously approach or move away from the battery pack, and the racks are also driven and connected with a linkage mechanism.

[0009] Furthermore, the linkage mechanism includes a protective groove, a synchronization key, a fixing rope, a bottom transmission spring, a top transmission spring, a protective plate, a linkage rod and a driven plate; the synchronization key is slidably arranged in the synchronization groove, the bottom transmission spring is installed between the synchronization key and the bottom wall of the synchronization groove, and the bottom transmission spring keeps the synchronization key away from the bottom wall of the synchronization groove; the protective grooves are provided at both ends of the bottom wall of the avoidance groove, the protective plate is slidably arranged in the protective groove on one side, the top transmission spring is installed between the protective plate and the bottom wall of the protective groove, and the top transmission spring keeps the synchronization key away from the bottom wall of the synchronization groove The protective plate is held away from the bottom wall of the protective groove, and the fixing rope is also fixedly connected between the synchronization key and the protective plate, and the fixing rope passes through the bottom transmission spring, the inside of the closing block and the top transmission spring in sequence, and the fixing rope is kept taut under the action of the bottom transmission spring and the top transmission spring; the driven plate is slidably arranged on the other side of the protective groove, and the protective plate and the driven plate are fixedly connected by the linkage rod, and the linkage rod is concavely arranged on the bottom wall of the avoidance groove, and the end of the linkage rod close to the battery pack is flush with the bottom wall of the avoidance groove.

[0010] Furthermore, the extrusion mechanism includes an extrusion block, a side sealing plate, a telescopic rod, a cylinder, a fixing plate, an extrusion spring and a vertical sliding key; the extrusion blocks are symmetrically arranged on the front and rear sides of the battery pack, the extrusion blocks are movably adapted to the avoidance grooves on both sides, the vertical section of the extrusion block is not less than the vertical section of the battery pack, the side sealing plate is fixedly installed on the side of the extrusion block away from the battery pack, the vertical section of the side sealing plate is larger than the vertical section of the extrusion block, the side sealing plate is used to close the connection between the closing block and the extrusion block, the telescopic rod is installed on the side of the side sealing plate away from the battery pack, the telescopic rod is connected to the cylinder on the side away from the battery pack, the cylinder is fixedly connected to the bottom plate, the fixing plate is fixedly sleeved on the middle part of the telescopic rod, the extrusion spring is installed between the fixing plate and the cylinder, the extrusion spring drives the fixing plate to approach the cylinder, the vertical sliding key is installed on the top of the bottom plate, the side sealing plate and the fixing plate are slidably arranged on the top of the bottom plate through the vertical sliding key.

[0011] Furthermore, the blocking mechanism includes a vertical slider, a driven slider and an L-shaped support rod; the bottom of the base plate is fixedly connected to a mounting plate by a guide column, the top of the mounting plate is fixedly connected to the L-shaped support rod by a support rod, the horizontal section of the L-shaped support rod is slidably connected to the vertical slider, a limiting spring is arranged between the vertical slider and the vertical section of the L-shaped support rod, the limiting spring keeps the vertical slider away from the cylinder, the vertical section of the L-shaped support rod is slidably connected to the driven slider, the top end of the driven slider extends out of the base plate and movably abuts against the fixing plate, the bottom end of the driven slider is arranged as an inclined end, and the end of the vertical slider away from the battery pack is slidably adapted to the inclined end of the driven slider; the end of the vertical slider close to the battery pack is provided with a driving mechanism.

[0012] Furthermore, a magnet is installed in the side wall of the driven slider away from the battery pack, and a second magnet is installed on the side wall of the bottom plate corresponding to the magnet, and the second magnet is electrically connected to the cylinder; when the magnet and the second magnet are attracted, the cylinder drives the telescopic rod to extend, thereby driving the extrusion block and the side sealing plate to move toward the battery pack.

[0013] Furthermore, the driving mechanism includes a servo motor, a bottom driving gear, a bottom driven wheel, a cam, an outer rotating sleeve and a driving shaft; the outer rotating sleeve is arranged on the top of the mounting plate, the middle part of the outer rotating sleeve is fixedly connected to the cam, the cross-section of the cam is arranged to be an ellipse, the vertical sliding blocks are symmetrically arranged at both ends of the cam, the top of the outer rotating sleeve is also fixedly sleeved with the bottom driven wheel, the bottom driven wheel is connected to the bottom driving gear through gear meshing, the middle part of the bottom driving gear is fixedly connected to the driving shaft, the servo motor is drivingly connected to the driving shaft, and the servo motor is fixedly connected to the mounting plate.

[0014] Furthermore, the driving mechanism also includes a backup motor, a top driving gear and a top driven wheel; the top driven wheel is fixedly connected to one end of the center shaft away from the center wheel, the top driven wheel is connected to the top driving gear by gear meshing, and the top driving gear is sleeved on the outside of the driving shaft; the center shaft is arranged inside the outer rotating sleeve, the backup motor is fixedly connected to the bottom of the center shaft, the backup motor is drivingly connected to the center shaft, and the outer rotating sleeve is rotatably installed on the top of the backup motor.

[0015] Furthermore, the top driving gear and the bottom driving gear are both configured as half gears of incomplete gears, and the teeth of the top driving gear and the bottom driving gear are configured in opposite directions; the bottom driven wheel and the top driven wheel are configured as complete gears, the radius of the bottom driven wheel is twice the radius of the bottom driving gear, and the radius of the top driven wheel is half the radius of the top driving gear.

[0016] Furthermore, there is an identification line on the top of the fixing plate 51, and the identification line is used to correspond to battery packs of different sizes.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention realizes the technical effects of the supporting platform and the two linear mechanisms in the background technology comparison document by setting a synchronization mechanism and a closing mechanism driven by the synchronization mechanism. At the same time, the precise placement and stable support (equivalent to the supporting platform) of battery packs of different sizes are realized through the combination of the fixed plate and the marking line, avoiding the uncertainty of manual operation and achieving better test effect. The synchronous movement of the closing mechanism (equivalent to the two linear mechanisms) is realized through the combination of the rack 52 and the center wheel 53 with the closing block 21, which makes the operation simpler and the linkage effect better.

[0019] 2. The present invention achieves the extrusion test of the battery pack and the explosion-proof protection during fire by respectively engaging the driving mechanism with the blocking mechanism and the synchronization mechanism. The device has a high degree of automation, simple control and good extrusion effect.

[0020] 3. The present invention drives the synchronous mechanism to move through a backup motor, thereby realizing fire protection for the battery pack when it is stationary, so that the device has a wide range of applications and strong structural adaptability.

[0021] 4. The present invention adopts the linkage structure design of the synchronization mechanism and the linkage mechanism, so that when the rack connected to the closing block on one side is inserted into the synchronization groove of the closing block on the other side, the rack drives the synchronization key in the synchronization groove to slide synchronously, and the synchronization key drives the top transmission spring to move toward the direction close to the battery pack through the fixed rope; when the closing blocks on both sides abut against each other and the rack is inserted into the extreme position of the synchronization groove on the other side, the protective plate close to one end of the battery pack slides out of the protective groove until the protective plates at both ends abut against each other, and at this time, the battery pack is closed by the closing block and the protective plate, thereby realizing automatic closing of the protective plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a battery pack extrusion test device of the present invention;

[0023] Figure 2 It is a schematic diagram of the main structure of the battery pack compression test device of the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the present invention after the extrusion mechanism and the battery pack are removed;

[0025] Figure 4 yes Figure 3 Schematic diagram of the structure after removing the closed block;

[0026] Figure 5It is a structural schematic diagram of the driving mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure between the extrusion mechanism and the blocking mechanism of the present invention;

[0028] Figure 7 is a schematic diagram of the top view of the blocking mechanism of the present invention;

[0029] Figure 8 It is a schematic diagram of the top structure of the support plate of the present invention.

[0030] Description of reference numerals in the figures:

[0031] 11. Battery pack; 21. Closing block; 22. Avoidance groove; 23. Closing groove; 24. Horizontal slide groove; 25. Horizontal slide block; 31. Extrusion block; 32. Side sealing plate; 33. Telescopic rod; 34. Cylinder; 35. Fixed plate; 36. Extrusion spring; 37. Vertical sliding key; 41. Bottom plate; 51. Fixed plate; 52. Rack; 53. Center wheel; 54. Synchronous groove; 55. Center shaft; 56. Backup motor; 61. Protection groove ; 62. Synchronous key; 63. Fixing rope; 64. Bottom transmission spring; 65. Top transmission spring; 66. Protective plate; 67. Linkage rod; 68. Follower plate; 71. Servo motor; 72. Bottom drive gear; 73. Bottom driven wheel; 74. Cam; 75. Outer rotating sleeve; 76. Top drive gear; 77. Top driven wheel; 78. Drive shaft; 81. Vertical slider; 82. Driven slider; 83. L-shaped support rod; 91. Magnet. DETAILED DESCRIPTION

[0032] See also Figure 1-8 ;

[0033] Embodiment 1:

[0034] A battery pack extrusion test device includes a battery pack 11 and a base plate 41, and also includes an extrusion mechanism, a closing mechanism, a synchronization mechanism, and a blocking mechanism; the battery pack 11 is slidably installed on the top of the synchronization mechanism, and the bottom of the synchronization mechanism is installed on the top of the base plate 41. The closing mechanism is symmetrically arranged on the left and right sides of the synchronization mechanism, and the synchronization mechanism drives the closing mechanisms on both sides to synchronously approach or move away from the battery pack 11; the extrusion mechanism is symmetrically arranged on the front and back sides of the battery pack 11, and blocking mechanisms are installed at the bottom of the extrusion mechanisms at both ends, and the blocking mechanisms control the extrusion mechanisms on both sides to synchronously approach or move away from the battery pack 11.

[0035] The closing mechanism includes a closing block 21, an avoidance groove 22, a closing groove 23, a transverse sliding groove 24 and a transverse sliding block 25; the closing block 21 is provided with an avoidance groove 22 on one side close to the battery pack 11, and the front and rear sides of the avoidance groove 22 pass through the closing block 21, and the avoidance groove 22 is used to accommodate the battery pack 11 and avoid the extrusion mechanism; the closing block 21 is provided with the closing groove 23 at the bottom, and the closing groove 23 is connected to the avoidance groove 22, and the closing groove 23 is used to slide and adapt to the synchronization mechanism, and the closing block 21 is slidably adapted to the top of the bottom plate 41 through the transverse sliding groove 24 and the transverse sliding block 25;

[0036] Preferably, the bottom end of the closing block 21 is further provided with the horizontal sliding groove 24 , the horizontal sliding groove 24 is slidably adapted to the horizontal sliding block 25 , and the bottom of the horizontal sliding block 25 is fixedly connected to the bottom plate 41 .

[0037] Among them, under normal circumstances, the minimum extrusion force needs to reach 100KN.

[0038] As a further scheme of this embodiment, the synchronization mechanism includes a fixed plate 51, a rack 52, a center wheel 53, a synchronization groove 54 and a center shaft 55; the fixed plate 51 is installed in the middle of the top of the bottom plate 41, and a through hole is opened in the middle of the fixed plate 51, the center shaft 55 is rotatably connected in the middle of the through hole, the center wheel 53 is fixedly connected to the outside of the center shaft 55, and the racks 52 are symmetrically installed at both ends of the center wheel 53, and the sides of the racks 52 on both sides away from each other are slidably arranged on the side wall of the through hole, one end of the rack 52 is fixedly connected to the bottom wall of the closed groove 23 on one side, and a synchronization groove 54 is opened on the bottom wall of the closed groove 23 on the other side corresponding to the rack 52; when the center shaft 55 rotates, the racks 52 on both sides move under the action of the center wheel 53, and the closed blocks 21 on both sides synchronously approach or move away from the battery pack 11.

[0039] Preferably, the end of the rack 52 connected to the closing block 21 on one side extends into the synchronization groove 54 of the closing block 21 on the other side, and a linkage mechanism is also provided inside the synchronization groove 54, and the rack 54 is drivingly connected to the linkage mechanism.

[0040] There is an identification line on the top of the fixing plate 51, and the identification line is used to correspond to battery packs of different sizes.

[0041] In this embodiment, a synchronization mechanism and a closing mechanism driven by the synchronization mechanism are provided to achieve the technical effects of the supporting platform and the two linear mechanisms in the background technology comparison document. At the same time, the combination of the fixed plate and the marking line realizes the precise placement and stable support of battery packs of different sizes (equivalent to the supporting platform), avoiding the uncertainty of manual operation and achieving better test results. The combination of the rack 52 and the center wheel 53 with the closing block 21 realizes the synchronous movement of the closing mechanism (equivalent to two linear mechanisms), which makes the operation simpler and the linkage effect better.

[0042] Embodiment 2:

[0043] In the first embodiment, there is no structural design of the extrusion mechanism.

[0044] Therefore, the extrusion mechanism includes an extrusion block 31, a side sealing plate 32, a telescopic rod 33, a cylinder 34, a fixing plate 35, an extrusion spring 36 and a vertical sliding key 37; the extrusion blocks 31 are symmetrically arranged on the front and rear sides of the battery pack 11, the extrusion blocks 31 are movably adapted to the avoidance grooves 22 on both sides, the vertical section of the extrusion block 31 is not less than the vertical section of the battery pack 11, the side sealing plate 32 is fixedly installed on the side of the extrusion block 31 away from the battery pack 11, the vertical section of the side sealing plate 32 is larger than the vertical section of the extrusion block 31, and the side sealing plate 32 is used to close the connection between the closing block 21 and the extrusion block 31 At the joint, the telescopic rod 33 is installed on the side of the side sealing plate 32 away from the battery pack 11, and the telescopic rod 33 is connected to the cylinder 34 on the side away from the battery pack 11. The cylinder 34 is fixedly connected to the bottom plate 41, and the middle part of the telescopic rod 33 is fixedly sleeved with the fixing plate 35. The extrusion spring 36 is installed between the fixing plate 35 and the cylinder 34. The extrusion spring 36 drives the fixing plate 35 to approach the cylinder 34. The vertical sliding key 37 is installed on the top of the bottom plate 41, and the side sealing plate 32 and the fixing plate 35 are slidably set on the top of the bottom plate 41 through the vertical sliding key 37.

[0045] Wherein, the blocking mechanism includes a vertical slider 81, a driven slider 82 and an L-shaped support rod 83;

[0046] The bottom of the base plate 41 is fixedly connected to a mounting plate via a guide column, and the top of the mounting plate is fixedly connected to the L-shaped support rod 83 via a support rod. The horizontal section of the L-shaped support rod 83 is slidably connected to the vertical slider 81, and a limit spring (not shown in the figure) is provided between the vertical slider 81 and the vertical section of the L-shaped support rod 83. The limit spring keeps the vertical slider 81 away from the cylinder 34. The vertical section of the L-shaped support rod 83 is slidably connected to the driven slider 82, and the top end of the driven slider 82 extends out of the base plate 41 and movably abuts against the fixing plate 35. The bottom end of the driven slider 82 is set as an inclined end, and the end of the vertical slider 81 away from the battery pack 11 is slidably adapted to the inclined end of the driven slider 82; the end of the vertical slider 81 close to the battery pack 11 is provided with a driving mechanism.

[0047] In this embodiment, in a natural state, the maximum end of the cam 74 abuts against the vertical slider 81, the fixing plate 35 is moved away from the battery pack 11 under the action of the extrusion spring 36, and the extrusion block 31 is moved away from the battery pack 11 under the action of the side sealing plate 32 and the telescopic rod 33. At this time, the driven slider 82 extends out of the battery pack 11 and abuts against one end of the fixing plate 35 close to the battery pack 11, and the L-shaped support rod 83 abuts against the vertical slider 81, further limiting the extension of the extrusion block 31.

[0048] Among them, a magnet 91 is installed in the side wall of the driven slider 82 away from the battery pack 11, and a second magnet (not shown in the figure) is installed on the side wall of the bottom plate 41 corresponding to the magnet 91, and the second magnet is electrically connected to the cylinder 34; when the magnet 91 and the second magnet are attracted, the cylinder 34 drives the telescopic rod 33 to extend, thereby driving the extrusion block 31 and the side sealing plate 32 to move toward the direction close to the battery pack 11.

[0049] In the present embodiment, in the working state, the cam 74 rotates, the smallest end of the cam 74 abuts against the vertical slider 81, the vertical slider 81 moves away from the cylinder 34 under the action of the limit spring, the driven slider 82 slides down freely, the magnet 91 is electrically connected to the second magnet, and when the magnet 91 and the second magnet are attracted, the second magnet drives the cylinder 34 to work, and the cylinder 34 drives the telescopic rod 33 to extend, the fixing plate 35 and the telescopic rod 33 overcome the elastic force of the extrusion spring 36 and thus drive the extrusion block 31 and the side sealing plate 32 to move toward the direction close to the battery pack 11, and the extrusion blocks 31 on both sides realize the extrusion test of the battery pack 11.

[0050] Preferably, under normal circumstances, the minimum extrusion force needs to reach 100KN.

[0051] Embodiment 3

[0052] In the second implementation, there is a lack of driving structure design, as well as a lack of extrusion and closed linkage structure design;

[0053] The driving mechanism includes a servo motor 71, a bottom driving gear 72, a bottom driven wheel 73, a cam 74, an outer rotating sleeve 75 and a driving shaft 78;

[0054] The outer rotating sleeve 75 is arranged on the top of the mounting plate, the cam 74 is fixedly connected to the middle of the outer rotating sleeve 75 , the cross section of the cam 74 is arranged to be an ellipse, and the vertical sliding blocks 81 are symmetrically arranged at both ends of the cam 74 .

[0055] Preferably, (under the natural state, the maximum end of the cam 74 is respectively against the vertical sliders 81 of the blocking mechanisms on both sides) the top of the outer rotating sleeve 75 is also fixedly sleeved with the bottom driven wheel 73, the bottom driven wheel 73 is connected to the bottom driving gear 72 by gear meshing, the middle part of the bottom driving gear 72 is fixedly connected to the driving shaft 78, the servo motor 71 is drivingly connected to the driving shaft 78, and the servo motor 71 is fixedly connected to the mounting plate.

[0056] Among them, the end of the central shaft 55 away from the central wheel 53 is fixedly connected to the top driven wheel 77, and the top driven wheel 77 is connected to the top driving gear 76 through gear meshing, and the top driving gear 76 is sleeved on the outer side of the driving shaft 78; the central shaft 55 is arranged inside the outer rotating sleeve 75, and the backup motor 56 is fixedly connected to the bottom of the central shaft 55, and the backup motor 56 is drivingly connected to the central shaft 55, and the outer rotating sleeve 75 is rotatably installed on the top of the backup motor 56.

[0057] As a further solution of this embodiment, the top driving gear 76 and the bottom driving gear 72 are both configured as half gears of incomplete gears, and the teeth of the top driving gear 76 and the bottom driving gear 72 are arranged in opposite directions; the bottom driven wheel 73 and the top driven wheel 77 are configured as complete gears, and the radius of the bottom driven wheel 73 is twice the radius of the bottom driving gear 72, and the radius of the top driven wheel 77 is half the radius of the top driving gear 76.

[0058] Example 4, please refer to Figure 1-8 ;

[0059] In this embodiment, a linkage structure design of a synchronization mechanism and a linkage mechanism is further added to realize automatic closing of the protective plate 66.

[0060] The linkage mechanism includes a protective groove 61, a synchronous key 62, a fixing rope 63, a bottom transmission spring 64, a top transmission spring 65, a protective plate 66, a linkage rod 67 and a driven plate 68; the synchronous key 62 is slidably arranged in the synchronous groove 54, and the bottom transmission spring 64 is installed between the synchronous key 62 and the bottom wall of the synchronous groove 54, and the bottom transmission spring 64 keeps the synchronous key 62 away from the bottom wall of the synchronous groove 54; the protective grooves 61 are opened at both ends of the bottom wall of the avoidance groove 22, and the protective groove 61 on one side slides in the protective groove 61 The protective plate 66 is provided, and the top transmission spring 65 is installed between the protective plate 66 and the bottom wall of the protective groove 61, and the top transmission spring 65 keeps the protective plate 66 away from the bottom wall of the protective groove 61. The fixing rope 63 is also fixedly connected between the synchronization key 62 and the protective plate 66, and the fixing rope 63 passes through the bottom transmission spring 64, the inside of the closing block 21 and the top transmission spring 65 in sequence. The fixing rope 63 is kept taut under the action of the bottom transmission spring 64 and the top transmission spring 65;

[0061] In this embodiment, in a natural state, the synchronization key 62 is flush with the bottom wall of the corresponding closed groove 23 under the action of the fixing rope 63; the protective plate 66 is flush with the bottom wall of the corresponding avoidance groove 22 under the action of the corresponding top transmission spring 65.

[0062] As a further solution of this embodiment, the guard groove 61 on the other side is slidably provided with the driven plate 68, the guard plate 66 and the driven plate 68 are fixedly connected by the linkage rod 67, the linkage rod 67 is concavely provided on the bottom wall of the avoidance groove 22, and the end of the linkage rod 67 close to the battery pack 11 is flush with the bottom wall of the avoidance groove 22;

[0063] In this embodiment, when the rack 52 connected to the closing block 21 on one side is inserted into the synchronization groove 54 of the closing block 21 on the other side, the rack 52 drives the synchronization key 62 inside the synchronization groove 54 to slide synchronously, and the synchronization key 62 drives the top transmission spring 65 to move toward the direction close to the battery pack 11 through the fixing rope 63; when the closing blocks 21 on both sides are against each other and the rack 52 is inserted into the extreme position of the synchronization groove 54 on the other side, the end of the protective plate 66 close to the battery pack 11 slides out of the protective groove 61 under the action of the top transmission spring 65 until the protective plates 66 at both ends are against each other (the extrusion block is withdrawn at this time), and at this time the battery pack 11 is closed by the closing block 21 and the protective plate 66.

[0064] When the extrusion block has abutted against the battery pack, the protection plate 66 cannot be extended, and the fixing rope 63 is loose at this time.

[0065] The method of using the device includes the following steps:

[0066] Fire during squeeze test:

[0067] 1) When the servo motor 71 rotates counterclockwise by 0-180 degrees, the bottom driving gear 72 meshes with the bottom driven wheel 73, the top driving gear 76 and the top driven wheel 77 are disengaged, and the cam 74 rotates clockwise by 0-90 degrees; during this process, the smallest end of the cam 74 abuts against the driven slider 82, the vertical slider 81 moves away from the cylinder 34 under the action of the limit spring, the driven slider 82 slides down freely, the magnet 91 is electrically connected to the second magnet, and when the magnet 91 and the second magnet begin to attract, the second magnet drives the cylinder 34 to work, the cylinder 34 drives the telescopic rod 33 to extend, the fixing plate 35 and the telescopic rod 33 overcome the elastic force of the extrusion spring 36 and then drive the extrusion block 31 and the side sealing plate 32 to move towards the direction close to the battery pack 11, and the extrusion blocks 31 on both sides implement the extrusion test of the battery pack 11;

[0068] 2) When the servo motor 71 rotates counterclockwise by 180-360 degrees, the bottom driving gear 72 is disengaged from the bottom driven wheel 73, and the top driving gear 76 is engaged with the top driven wheel 77; the top driving gear 76 rotates half a circle, and the top driven wheel 77 rotates clockwise by one circle; the center shaft 55 rotates clockwise by one circle following the center wheel 53, and the racks 52 on both sides move under the action of the center wheel 53, and the closing blocks 21 on both sides synchronously approach the battery pack 11, and the end of the rack 52 connected to the closing block 21 on one side extends into the closing block 2 on the other side. 1, the rack 52 drives the synchronization key 62 in the synchronization groove 54 to slide synchronously, and the synchronization key 62 drives the top transmission spring 65 to move in the direction close to the battery pack 11 through the fixing rope 63; when the closing blocks 21 on both sides are against each other and the rack 52 is inserted into the extreme position of the synchronization groove 54 on the other side, the protective plate 66 is blocked by the extrusion block 31 and cannot be extended. At this time, the battery pack 11 is closed by the closing block 21 and the extrusion block 31, so that the explosion-proof protection of the battery pack 11 by the closing block 21 and the extrusion block 31 is realized;

[0069] 3) After the test is completed, the servo motor 71 is reset and rotates 0-180 degrees clockwise, and the closing blocks 21 on both sides are reset; when rotating 180-360 degrees clockwise, the cam 74 rotates 0-90 degrees counterclockwise, the magnet 91 and the second magnet are disengaged, the cylinder 34 is powered off, and the fixing plate 35 and the telescopic rod 33 drive the servo motors 71 of the extrusion blocks on both sides to reset under the action of the extrusion spring 36, and then the cam 74 rotates to the maximum end of the cam 74 and abuts against the vertical slider 81, and the fixing plate 35 moves away from the battery pack 11 under the action of the extrusion spring 36, and the extrusion block 31 moves away from the battery pack 11 under the action of the side sealing plate 32 and the telescopic rod 33, at this time, the driven slider 82 extends out of the battery pack 11 and abuts against the end of the fixing plate 35 close to the battery pack 11, and the L-shaped support rod 83 abuts against the vertical slider 81, further limiting the extension of the extrusion block 31, thereby realizing the overall reset of the device.

[0070] Repeat the above operations 1), 2) and 3) to implement sequential squeezing detection of multiple battery packs 11.

[0071] When the battery pack 11 is left standing and catches fire;

[0072] 1) The backup motor 56 works, thereby driving the central shaft 55 to drive the central wheel 53 to rotate one circle clockwise. At this time, the top driving gear 76 and the top driven wheel 77 are disengaged, and only the top driven wheel 77, the central shaft 55 and the central wheel 53 rotate). The racks 52 on both sides move under the action of the central wheel 53, and the closing blocks 21 on both sides synchronously approach the battery pack 11, and the end of the rack 52 connected to the closing block 21 on one side extends into the synchronous groove 54 of the closing block 21 on the other side, and the rack 52 drives the synchronous groove 54 to rotate. 4, the synchronous key 62 inside the battery pack 11 slides synchronously, and the synchronous key 62 drives the top transmission spring 65 to move toward the direction close to the battery pack 11 through the fixing rope 63; when the closing blocks 21 on both sides abut against each other, and the rack 52 is inserted into the limit position of the synchronous groove 54 on the other side, the protective plate 66 close to one end of the battery pack 11 slides out of the protective groove 61 until the protective plates 66 at both ends abut against each other, and at this time, the battery pack 11 is closed by the closing block 21 and the protective plate 66, so that the explosion-proof protection of the battery pack 11 by the closing block 21 and the protective plate 66 is realized.

[0073] 2) Reverse one circle to reset.

[0074] When the battery pack 11 is left standing and catches fire, explosion-proof protection is achieved through the above operations 1) and 2).

Claims

1. A battery pack compression test device, comprising a battery pack and a base plate, characterized in that: It also includes squeezing mechanism, closing mechanism, synchronization mechanism and blocking mechanism; The battery pack is slidably mounted on the top of the synchronization mechanism, and the bottom of the synchronization mechanism is mounted on the top of the bottom plate. The closing mechanisms are symmetrically arranged on the left and right sides of the synchronization mechanism, and the synchronization mechanism drives the closing mechanisms on both sides to synchronously approach or move away from the battery pack; the extrusion mechanisms are symmetrically arranged on the front and rear sides of the battery pack, and blocking mechanisms are installed at the bottom of the extrusion mechanisms at both ends, and the blocking mechanisms control the extrusion mechanisms on both sides to synchronously approach or move away from the battery pack; The closing mechanism comprises a closing block, an avoidance groove, a closing groove, a horizontal sliding groove and a horizontal sliding block; The closing block is provided with an avoidance groove on one side close to the battery pack, and the front and rear sides of the avoidance groove penetrate the closing block, and the avoidance groove is used to accommodate the battery pack and avoid the extrusion mechanism. The closing block is provided with the closing groove at the bottom, and the closing groove is connected to the avoidance groove, and the closing groove is used to slide and adapt to the synchronization mechanism, and the closing block is slidably adapted to the top of the bottom plate through the horizontal sliding groove and the horizontal sliding block; The synchronization mechanism includes a fixed plate, a rack, a center wheel, a synchronization groove and a center shaft; The fixing plate is installed in the middle of the top of the bottom plate, a through hole is opened in the middle of the fixing plate, the center shaft is rotatably connected to the middle of the through hole, the center wheel is fixedly connected to the outside of the center shaft, the racks are symmetrically installed at both ends of the center wheel, the sides of the racks on both sides away from each other are slidably arranged on the side wall of the through hole, one end of the rack is fixedly connected to the bottom wall of the closed groove on one side, and a synchronization groove is opened on the bottom wall of the closed groove on the other side corresponding to the rack; When the central shaft rotates, the racks on both sides move under the action of the central wheel, and the closing blocks on both sides synchronously approach or move away from the battery pack, and the racks on both sides are driven and connected with a linkage mechanism; The linkage mechanism comprises a protection groove, a synchronization key, a fixing rope, a bottom transmission spring, a top transmission spring, a protection plate, a linkage rod and a driven plate; The synchronization key is slidably arranged in the synchronization groove, and the bottom transmission spring is installed between the synchronization key and the bottom wall of the synchronization groove, and the bottom transmission spring keeps the synchronization key away from the bottom wall of the synchronization groove; The bottom wall of the avoidance groove is provided with the guard groove at both ends, the guard plate is slidably arranged in the guard groove on one side, the top transmission spring is installed between the guard plate and the bottom wall of the guard groove, the top transmission spring keeps the guard plate away from the bottom wall of the guard groove, the fixing rope is also fixedly connected between the synchronization key and the guard plate, the fixing rope passes through the bottom transmission spring, the inside of the closing block and the top transmission spring in sequence, and the fixing rope is kept taut under the action of the bottom transmission spring and the top transmission spring; The guard groove on the other side is slidably provided with the driven plate, the guard plate and the driven plate are fixedly connected by the linkage rod, the linkage rod is concavely provided on the bottom wall of the avoidance groove, and one end of the linkage rod close to the battery pack is flush with the bottom wall of the avoidance groove; The extrusion mechanism comprises an extrusion block, a side sealing plate, a telescopic rod, a cylinder, a fixing plate, an extrusion spring and a vertical sliding key; The extrusion blocks are symmetrically arranged on the front and rear sides of the battery pack, and the extrusion blocks are movably adapted to the avoidance grooves on both sides, the vertical section of the extrusion block is not less than the vertical section of the battery pack, and the side sealing plate is fixedly installed on the side of the extrusion block away from the battery pack, and the vertical section of the side sealing plate is larger than the vertical section of the extrusion block, and the side sealing plate is used to close the connection between the sealing block and the extrusion block, and the telescopic rod is installed on the side of the side sealing plate away from the battery pack, and the telescopic rod is connected to the cylinder on the side away from the battery pack, and the cylinder is fixedly connected to the bottom plate, and the fixing plate is fixedly sleeved on the middle part of the telescopic rod, and the extrusion spring is installed between the fixing plate and the cylinder, and the extrusion spring drives the fixing plate to approach the cylinder, and the vertical sliding key is installed on the top of the bottom plate, and the side sealing plate and the fixing plate are slidably arranged on the top of the bottom plate through the vertical sliding key; The blocking mechanism includes a vertical slider, a driven slider and an L-shaped support rod; The bottom of the base plate is fixedly connected to the mounting plate by a guide column, and the top of the mounting plate is fixedly connected to the L-shaped support rod by a support rod, and the horizontal section of the L-shaped support rod is slidably connected to the vertical slide block, and a limiting spring is arranged between the vertical slide block and the vertical section of the L-shaped support rod, and the limiting spring keeps the vertical slide block away from the cylinder, and the vertical section of the L-shaped support rod is slidably connected to the driven slide block, and the top end of the driven slide block extends out of the base plate and movably abuts against the fixing plate, and the bottom end of the driven slide block is arranged as an inclined end, and an end of the vertical slide block away from the battery pack is slidably adapted to the inclined end of the driven slide block; and a driving mechanism is arranged at an end of the vertical slide block close to the battery pack; A magnet is installed in the side wall of the driven slider away from the battery pack, and a second magnet is installed on the side wall of the bottom plate corresponding to the magnet, and the second magnet is electrically connected to the cylinder; when the magnet and the second magnet are attracted, the cylinder drives the telescopic rod to extend, thereby driving the extrusion block and the side sealing plate to move toward the battery pack; The driving mechanism comprises a servo motor, a bottom driving gear, a bottom driven wheel, a cam, an outer rotating sleeve and a driving shaft; The outer rotating sleeve is arranged on the top of the mounting plate, the cam is fixedly connected to the middle part of the outer rotating sleeve, the cross section of the cam is arranged to be an ellipse, the vertical sliding blocks are symmetrically arranged on both ends of the cam, the bottom driven wheel is also fixedly sleeved on the top of the outer rotating sleeve, the bottom driven wheel is connected to the bottom driving gear by gear meshing, the driving shaft is fixedly connected to the middle part of the bottom driving gear, the servo motor is drivingly connected to the driving shaft, and the servo motor is fixedly connected to the mounting plate.

2. The battery pack compression test device according to claim 1, characterized in that: The driving mechanism also includes a spare motor, a top driving gear and a top driven wheel; The top driven wheel is fixedly connected to one end of the center shaft away from the center wheel, and the top driven wheel is connected to the top driving gear by gear meshing, and the top driving gear is sleeved on the outside of the driving shaft; the center shaft is arranged inside the outer rotating sleeve, and the backup motor is fixedly connected to the bottom of the center shaft, and the backup motor is drivingly connected to the center shaft, and the outer rotating sleeve is rotatably installed on the top of the backup motor.

3. The battery pack compression test device according to claim 2, characterized in that: The top driving gear and the bottom driving gear are both configured as half gears, and the teeth of the top driving gear and the bottom driving gear are configured in opposite directions; the bottom driven wheel and the top driven wheel are configured as full gears, and the radius of the bottom driven wheel is twice the radius of the bottom driving gear, and the radius of the top driven wheel is half the radius of the top driving gear.

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