Lithium battery protection plate with good anti-seismic performance

Abstract

The invention discloses a lithium battery protection plate with good anti-seismic performance, and relates to the technical field of lithium battery protection plates, the lithium battery protection plate comprises a shell, a partition plate is fixedly mounted on the inner wall of the shell, a buffer sponge is arranged between the partition plate and the shell, a baffle is fixedly mounted on the inner wall of the shell, and a plurality of battery boxes are fixedly mounted on the top of the partition plate. The sliding plate is slidably mounted on the inner wall of the battery box, the multiple clamping plates are slidably mounted at the bottom of the sliding plate and the bottom of the inner wall of the battery box, the four rotating rods are rotatably mounted between the clamping plates, the connecting shaft rotatably penetrates through the rotating rods, and the connecting shaft slidably penetrates through the inner wall and the outer wall of the battery box; after the lithium battery is placed in the battery box and is tightly attached to the inner wall of the battery box, impact force generated by the lithium battery due to inertia increase when the lithium battery slides towards the bottom due to the large mass of the lithium battery is prevented, and the protection effect on the lithium battery is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery protection plates, in particular to a lithium battery protection plate with good shock resistance. Background Art

[0002] The lithium battery protection board is a key component of the lithium battery pack. It is responsible for the protection and management of the battery to ensure the safety, efficiency and life of the battery during use.

[0003] The patent with patent announcement number CN212113804U relates to a lithium battery protection plate with good seismic performance, including a protection plate, the lower end of the protection plate is connected to a support plate through a shock absorbing mechanism, a protection frame is arranged outside the protection plate, sliding blocks are symmetrically connected to the two ends of the side wall of the protection plate, sliding grooves are symmetrically opened on the inner frame wall of the protection frame, the sliding blocks are slidably connected in the corresponding sliding grooves, the upper end of the protection plate is connected to a lithium battery, the upper end of the protection plate is symmetrically connected to a fixing mechanism, the two ends of the lithium battery are connected to wires, the frame wall of the protection frame is opened with through holes, the wires pass through the through holes and extend outside the protection frame. This patent can prevent the lithium battery and the wires from detaching when the lithium battery is subjected to external force, and can also provide shock absorbing protection for the lithium battery to prevent the lithium battery from being damaged.

[0004] In the above patent, when the lithium battery is subjected to external force, the lithium battery and the wire can be prevented from being separated, and the lithium battery can be shock-absorbing and protected to prevent the lithium battery from being damaged. However, when the lithium battery is disassembled and stored, due to the large weight of the lithium battery itself, the lithium battery has a large inertia when placed, which makes the protective plate easily damaged, causing property loss. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a lithium battery protection plate with good shock resistance, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A lithium battery protection plate with good seismic resistance, comprising a shell, a top cover is fixedly installed on the top of the shell, a partition is fixedly installed on the inner wall of the shell, a buffer sponge is arranged between the partition and the shell, a baffle is fixedly installed on the inner wall of the shell, and a storage device, a limit device and an unlocking device are arranged inside the shell; The storage device includes: a plurality of battery boxes, a sliding plate, a plurality of clamping plates, four rotating rods, a connecting shaft, an inflating cylinder, a sealing plate, a telescopic rod and a blocking plate, wherein the plurality of battery boxes are fixedly mounted on the top of the partition, the sliding plate is slidably mounted on the inner wall of the battery box, the plurality of clamping plates are slidably mounted on the bottom of the sliding plate and the bottom of the inner wall of the battery box, the four rotating rods are rotatably mounted between the clamping plates, the connecting shaft is rotatably penetrated between the rotating rods, the connecting shaft is slidably penetrated between the inner and outer walls of the battery box, and the inflating cylinder is fixedly mounted on the battery box The bottom of the inner wall of the sealing plate is slidably installed on the inner wall of the inflatable cylinder, a circular hole is opened on the circumferential surface of the inflatable cylinder, the telescopic rod is fixedly installed on the top of the sealing plate, the free end of the telescopic rod is fixedly installed on the bottom of the sliding plate, the blocking plate is fixedly installed on the bottom of the sealing plate, and a circular hole is opened on the surface of the blocking plate. The movement of the sealing plate toward the bottom will drive the blocking plate to move toward the bottom, and the movement of the blocking plate toward the bottom will drive the circular hole on the surface of the blocking plate to move. After the circular hole on the surface of the blocking plate moves to the bottom, it will coincide with the circular hole at the bottom of the surface of the inflatable cylinder.

[0007] According to the above technical solution, a No. 1 spring is arranged between the sealing plate and the inflation cylinder, the blocking plate is in contact with the inflation cylinder, and the sealing plate is driven to reset by the No. 1 spring.

[0008] According to the above technical solution, the limiting device includes: a circular column, a support plate, a transmission block, a triangular rod, a hollow cylinder and a piston. The circular column is fixedly installed on one end of the connecting shaft close to the baffle, the support plate is fixedly installed on the circumferential surface of the circular column, the transmission block is fixedly installed on the bottom of the support plate, the triangular rod is fixedly installed on the bottom of the support plate, the hollow cylinder is fixedly installed between the baffle and the battery box, and the piston is slidably installed on the inner wall of the hollow cylinder.

[0009] According to the above technical solution, the limiting device includes: the limiting device also includes: a connecting rod, a transmission bevel, a sliding block and a friction rod, the connecting rod slides through the inner and outer walls of the hollow cylinder, the end of the connecting rod close to the inner wall of the hollow cylinder is fixedly installed on the side of the piston close to the baffle, the transmission bevel is fixedly installed on the end of the connecting rod away from the piston, a sliding groove is opened on the surface of the transmission bevel, one end of the sliding block is fixedly installed on the bottom of the triangular rod, the other end of the sliding block is slidably installed on the inner wall of the sliding groove, the friction rod is fixedly installed on the side of the piston away from the connecting rod, the movement of the transmission bevel will drive the connecting rod to move in the direction of the baffle, the movement of the connecting rod will drive the piston to move in the direction of the baffle, the movement of the piston will drive the friction rod to move in the direction away from the battery box, and the movement of the friction rod will release the contact of the lithium battery.

[0010] According to the above technical solution, a contact hole is opened on the surface of the battery box, and a No. 2 spring is arranged between the slider and the sliding groove, and the slider is driven to reset by the No. 2 spring.

[0011] According to the above technical solution, the unlocking device includes: a friction block, a suction cup, a hollow rod and an air outlet, the friction block is fixedly installed on the end of the friction rod away from the piston, the suction cup is fixedly installed on the end of the friction block away from the piston, the hollow rod slides through the inner and outer walls of the friction rod, and the air outlet is opened on the circumferential surface of the hollow rod. The suction cup and the lithium battery are squeezed against each other, so that the air inside the suction cup is completely discharged, so that the inside of the suction cup becomes a vacuum state.

[0012] According to the above technical solution, the unlocking device also includes: a square block, a long rod, a reset block and an unlocking block, the square block is fixedly mounted on the circumferential surface of the hollow rod, the long rod rotates and passes through the inner and outer walls of the outer shell and the hollow cylinder, the reset block is fixedly mounted on one end of the long rod, and the unlocking block is fixedly mounted on the other end of the long rod. After the air outlet moves, the inside and outside of the suction cup are connected through the air outlet, so that air can flow into the inside of the suction cup through the air outlet, thereby releasing the vacuum state inside the suction cup.

[0013] According to the above technical solution, a reset spring is arranged between the long rod and the housing, the unlocking block is in contact with the square block, and the long rod is reset by the reset spring.

[0014] The present invention provides a lithium battery protection board with good shock resistance. It has the following beneficial effects: (1) The invention improves the protection effect of the lithium battery by ensuring that after the lithium battery is placed in the battery box and the lithium battery is tightly fitted with the inner wall of the battery box, the lithium battery will slowly slide to the bottom and be completely stored in the battery box when it moves to the bottom, thereby preventing the lithium battery from generating impact force due to the increase in inertia caused by its own large mass when it slides to the bottom, thereby causing damage to the lithium battery. The circular hole on the surface of the blocking plate will overlap with the circular hole on the bottom of the surface of the inflator when the sealing plate moves to the top, so that air can flow into the interior of the inflator through the circular hole when the sealing plate moves to the top, thereby preventing the inflator and the sealing plate from being tightly fitted. The vacuum inside will cause negative pressure to generate suction, which will make it difficult for the sealing plate to move when it moves to the top, thereby improving the practicality of the device.

[0015] (2) The invention contacts the lithium battery through the contact hole. After the friction rod contacts the lithium battery, the lithium battery will be positioned to prevent the lithium battery from shaking inside the battery box, thereby reducing the risk of damage to the lithium battery. The movement of the piston will drive the friction rod to move away from the battery box. The movement of the friction rod will release the contact with the lithium battery, so that the limiting state of the lithium battery by the limiting device can be changed according to the movement state of the storage device, thereby improving the practicality of the device.

[0016] (3) The invention, by squeezing the suction cup and the lithium battery against each other, completely expels the air inside the suction cup, turning the suction cup into a vacuum state, thereby preventing the friction rod from reducing the limiting effect on the lithium battery and further improving the limiting effect on the lithium battery. After moving through the air vent, the inside and outside of the suction cup are connected through the air vent, so that air can flow into the suction cup through the air vent, releasing the vacuum state inside the suction cup. When a single lithium battery is disassembled, the limit of the lithium battery cannot be released by rotating or pressing the reset block alone, thereby preventing staff from accidentally touching it and improving the protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the housing of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the battery box of the present invention; Figure 4 It is a schematic diagram of the structure of the storage device of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the inflator of the present invention; Figure 6 It is a schematic diagram of the structure of the limiting device of the present invention; Figure 7 This is a schematic diagram of the positional relationship between the triangular rod and the transmission inclined block of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the hollow cylinder of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the hollow rod of the present invention.

[0018] In the figure: 1. shell; 2. top cover; 3. partition; 41. battery box; 42. sliding plate; 43. splint; 44. rotating rod; 45. connecting shaft; 46. inflator; 47. sealing plate; 48. telescopic rod; 49. blocking plate; 51. circular column; 52. supporting plate; 53. transmission block; 54. triangular rod; 55. hollow cylinder; 56. piston; 57. connecting rod; 58. transmission oblique block; 59. slider; 510. friction rod; 61. friction block; 62. suction cup; 63. hollow rod; 64. air outlet; 65. square block; 66. long rod; 67. reset block; 68. unlocking block; 7. baffle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 5 One embodiment of the present invention is: a lithium battery protection plate with good shock resistance, comprising a shell 1, a top cover 2 is fixedly installed on the top of the shell 1, a partition 3 is fixedly installed on the inner wall of the shell 1, a buffer sponge is arranged between the partition 3 and the shell 1, a baffle 7 is fixedly installed on the inner wall of the shell 1, and a storage device is arranged inside the shell 1, and the storage device comprises: a plurality of battery boxes 41, a sliding plate 42, a plurality of clamping plates 43, four rotating rods 44, a connecting shaft 45, an inflator 46, a sealing plate 47, a telescopic rod 48 and a blocking plate 49, Several battery boxes 41 are fixedly mounted on the top of the partition 3, the sliding plate 42 is slidably mounted on the inner wall of the battery box 41, several clamping plates 43 are slidably mounted on the bottom of the sliding plate 42 and the bottom of the inner wall of the battery box 41, four rotating rods 44 are rotatably mounted between the clamping plates 43, the connecting shaft 45 rotates and penetrates between the rotating rods 44, the connecting shaft 45 slides and penetrates the inner and outer walls of the battery box 41, the inflatable cylinder 46 is fixedly mounted on the bottom of the inner wall of the battery box 41, the sealing plate 47 is slidably mounted on the inner wall of the inflatable cylinder 46, and the inflatable cylinder 46 is fixedly mounted on the bottom of the inner wall of the battery box 41. A circular hole is provided on the circumferential surface, and a telescopic rod 48 is fixedly mounted on the top of the sealing plate 47. The free end of the telescopic rod 48 is fixedly mounted on the bottom of the sliding plate 42, so that the air inside the inflatable cylinder 46 is slowly discharged through the smaller circular hole, so that the speed of the sliding plate 42 when moving toward the bottom is reduced, so that after the lithium battery is placed in the battery box 41 and the lithium battery is tightly fitted with the inner wall of the battery box 41, the lithium battery will slowly slide toward the bottom and be completely stored in the battery box 41 when moving toward the bottom, preventing the lithium battery from generating impact force due to the increase in inertia when sliding toward the bottom due to its large mass, causing damage to the lithium battery, thereby improving the protection effect of the lithium battery, and the blocking plate 49 is fixedly mounted on the bottom of the sealing plate 47. A circular hole is provided on the surface of the blocking plate 49, so that when the sealing plate 47 moves toward the top, air can flow into the interior of the inflatable cylinder 46 through the circular hole, preventing the inflatable cylinder 46 from generating a vacuum inside after the sealing plate 47 is tightly fitted with the sealing plate 47, resulting in negative pressure generating suction, which makes it difficult for the sealing plate 47 to move when moving toward the top, thereby improving the practicality of the device.

[0021] A No. 1 spring is arranged between the sealing plate 47 and the inflation cylinder 46 , and the blocking plate 49 is in contact with the inflation cylinder 46 , and the No. 1 spring drives the sealing plate 47 to reset.

[0022] When the present embodiment is working, the top cover 2 is opened, the lithium battery is aligned with the battery box 41 and placed inside the battery box 41, the lithium battery moves toward the bottom and contacts with the sliding plate 42, the movement of the lithium battery drives the sliding plate 42 to move toward the bottom, the movement of the sliding plate 42 to the bottom drives the top clamping plate 43 to move toward the bottom, the top clamping plate 43 moves toward the bottom and drives the rotating rod 44 to rotate toward the bottom, the movement of the rotating rod 44 to the bottom drives the bottom clamping plate 43 to move away from each other, the movement of the bottom clamping plate 43 drives the two ends of the rotating rod 44 to move toward both sides, the movement of the rotating rod 44 drives the connecting shaft 45 to the bottom, the movement of the sliding plate 42 to the bottom drives the free end of the telescopic rod 48 to move toward the bottom, the movement of the free end of the telescopic rod 48 to the bottom drives the sealing plate 47 to move toward the bottom, the sealing plate 47 moves toward the bottom to squeeze the air inside the inflatable cylinder 46 to be discharged through the circular hole, so that the air inside the inflatable cylinder 46 is slowly discharged through the smaller circular hole, so that the sliding plate 42 The speed when moving toward the bottom is reduced, so that after the lithium battery is placed inside the battery box 41 and the lithium battery is tightly fitted with the inner wall of the battery box 41, the lithium battery will slowly slide toward the bottom and be completely stored in the battery box 41 when moving toward the bottom, preventing the lithium battery from generating impact force due to the increase in inertia of its own mass when sliding toward the bottom, causing damage to the lithium battery, thereby improving the protection effect of the lithium battery, the sealing plate 47 moving toward the bottom will drive the blocking plate 49 to move toward the bottom, and the blocking plate 49 moving toward the bottom will drive the circular hole on the surface of the blocking plate 49 to move, and after the circular hole on the surface of the blocking plate 49 moves to the bottom, it will overlap with the circular hole at the bottom of the surface of the inflator 46, so that when the sealing plate 47 moves toward the top, air can flow into the interior of the inflator 46 through the circular hole, preventing the inflator 46 from generating a vacuum inside after the sealing plate 47 is tightly fitted, resulting in negative pressure and suction, which makes the sealing plate 47 difficult to move when moving toward the top, thereby improving the practicality of the device.

[0023] See also Figure 1-Figure 9 On the basis of the above embodiment, in another embodiment of the present invention, a limiting device and an unlocking device are arranged inside the housing 1, wherein the limiting device comprises: a circular column 51, a support plate 52, a transmission block 53, a triangular rod 54, a hollow cylinder 55 and a piston 56, the circular column 51 is fixedly mounted on one end of the connecting shaft 45 close to the baffle 7, the support plate 52 is fixedly mounted on the circumferential surface of the circular column 51, the transmission block 53 is fixedly mounted on the bottom of the support plate 52, the triangular rod 54 is fixedly mounted on the bottom of the support plate 52, the hollow cylinder 55 is fixedly mounted between the baffle 7 and the battery box 41, and the piston 56 is slidably mounted on the inner wall of the hollow cylinder 55.

[0024] The limiting device includes: the limiting device also includes: a connecting rod 57, a transmission bevel 58, a slider 59 and a friction rod 510, the connecting rod 57 slides through the inner and outer walls of the hollow cylinder 55, the end of the connecting rod 57 close to the inner wall of the hollow cylinder 55 is fixedly installed on the side of the piston 56 close to the baffle 7, the transmission bevel 58 is fixedly installed on the end of the connecting rod 57 away from the piston 56, a sliding groove is provided on the surface of the transmission bevel 58, one end of the slider 59 is fixedly installed on the bottom of the triangular rod 54, and the other end of the slider 59 is slidably installed on the inner wall of the sliding groove, and the friction rod 510 is fixedly installed on the side of the piston 56 away from the connecting rod 57, so as to prevent the lithium battery from shaking inside the battery box 41 and reduce the risk of damage to the lithium battery. The limiting state of the lithium battery by the limiting device can be changed according to the movement state of the storage device, thereby improving the practicality of the device.

[0025] A contact hole is provided on the surface of the battery box 41 , and a No. 2 spring is provided between the slider 59 and the sliding groove, so that the slider 59 is driven to reset by the No. 2 spring.

[0026] The unlocking device includes: a friction block 61, a suction cup 62, a hollow rod 63 and an air outlet 64. The friction block 61 is fixedly installed on the end of the friction rod 510 away from the piston 56, the suction cup 62 is fixedly installed on the end of the friction block 61 away from the piston 56, the hollow rod 63 slides through the inner and outer walls of the friction rod 510, and the air outlet 64 is opened on the circumferential surface of the hollow rod 63 to prevent the friction rod 510 from reducing the limiting effect on the lithium battery and further improve the limiting effect on the lithium battery.

[0027] The unlocking device also includes: a square block 65, a long rod 66, a reset block 67 and an unlocking block 68. The square block 65 is fixedly mounted on the circumferential surface of the hollow rod 63. The long rod 66 rotates and penetrates the inner and outer walls of the outer shell 1 and the hollow cylinder 55. The reset block 67 is fixedly mounted on one end of the long rod 66, and the unlocking block 68 is fixedly mounted on the other end of the long rod 66. When a single lithium battery is disassembled, rotating or pressing the reset block 67 alone cannot release the limit on the lithium battery, thereby preventing staff from accidentally touching it and improving the protection effect.

[0028] A reset spring is provided between the long rod 66 and the housing 1 , and the unlocking block 68 contacts the square block 65 , and the long rod 66 is reset by the reset spring.

[0029] When the present embodiment is working, the movement of the connecting shaft 45 toward the bottom will drive the circular column 51 toward the bottom, the movement of the circular column 51 will drive the supporting plate 52 toward the bottom, the movement of the supporting plate 52 toward the bottom will drive the transmission block 53 toward the bottom, the movement of the transmission block 53 toward the bottom will drive the triangular rod 54 toward the bottom, the movement of the triangular rod 54 toward the bottom will drive the slider 59 toward the bottom, the movement of the slider 59 toward the bottom will slide inside the sliding groove, the movement of the slider 59 will drive the transmission bevel block 58 to move in the direction away from the baffle 7, the movement of the transmission bevel block 58 will drive the connecting rod 57 to move in the direction away from the baffle 7, the movement of the connecting rod 57 will drive the piston 56 to move in the direction away from the baffle 7, the movement of the piston 56 will drive the friction rod 510 to move in the direction of the battery box 41, and the movement of the friction rod 510 will pass through the connecting rod The contact hole is formed and contacts the lithium battery. After the friction rod 510 contacts the lithium battery, the lithium battery will be positioned to prevent the lithium battery from shaking inside the battery box 41, thereby reducing the risk of damage to the lithium battery. The slider 59 is driven to move to the top through the No. 2 spring reset. The slider 59 moves to the top and slides inside the sliding groove. The movement of the slider 59 drives the transmission bevel 58 to move in the direction of the baffle 7. The movement of the transmission bevel 58 drives the connecting rod 57 to move in the direction of the baffle 7. The movement of the connecting rod 57 drives the piston 56 to move in the direction of the baffle 7. The movement of the piston 56 drives the friction rod 510 to move away from the battery box 41. The movement of the friction rod 510 releases the contact with the lithium battery, so that the limiting state of the limiting device on the lithium battery can be changed according to the motion state of the storage device, thereby improving the practicability of the device.

[0030] The movement of the friction rod 510 will drive the friction block 61 and the suction cup 62 to move toward the lithium battery. After the suction cup 62 contacts the lithium battery, the suction cup 62 and the lithium battery squeeze each other, so that the air inside the suction cup 62 is completely discharged, so that the inside of the suction cup 62 becomes a vacuum state, preventing the friction rod 510 from reducing the limiting effect of the lithium battery, and further improving the limiting effect of the lithium battery. The reset block 67 is manually pushed, and the reset block 67 moves to drive the long rod 66 to move toward the inside of the shell 1. The movement of the long rod 66 drives the unlocking block 68 to move toward the direction of the friction rod 510, and then the reset block 67 is rotated toward the top. The rotation of the reset block 67 drives The long rod 66 rotates, and the rotation of the long rod 66 drives the unlocking block 68 to rotate toward the top. The rotation of the unlocking block 68 will contact the square block 65. The rotation of the square block 65 will drive the hollow rod 63 to move in the direction of the suction cup 62. The movement of the hollow rod 63 will drive the air outlet 64 to move. After the air outlet 64 moves, the inside and outside of the suction cup 62 are connected through the air outlet 64, so that air can flow into the inside of the suction cup 62 through the air outlet 64, and the vacuum state inside the suction cup 62 is released. When a single lithium battery is disassembled, the limit of the lithium battery cannot be released by rotating or pressing the reset block 67 alone, thereby preventing staff from accidentally touching it and improving the protection effect.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery protection board with good shock resistance, comprising a housing (1), characterized in that: A top cover (2) is fixedly mounted on the top of the shell (1), a partition (3) is fixedly mounted on the inner wall of the shell (1), a buffer sponge is arranged between the partition (3) and the shell (1), a baffle (7) is fixedly mounted on the inner wall of the shell (1), and a storage device, a limiting device and an unlocking device are arranged inside the shell (1); The storage device comprises: a plurality of battery boxes (41), a sliding plate (42), a plurality of clamping plates (43), four rotating rods (44), a connecting shaft (45), an inflating cylinder (46), a sealing plate (47), a telescopic rod (48) and a blocking plate (49), wherein the plurality of battery boxes (41) are fixedly mounted on the top of the partition (3), the sliding plate (42) is slidably mounted on the inner wall of the battery box (41), the plurality of clamping plates (43) are slidably mounted on the bottom of the sliding plate (42) and the bottom of the inner wall of the battery box (41), the four rotating rods (44) are rotatably mounted between the clamping plates (43), and the connecting shaft (45) is rotatably mounted between the clamping plates (43). 5) is rotatably inserted between the rotating rods (44), the connecting shaft (45) is slidably inserted between the inner and outer walls of the battery box (41), the inflatable cylinder (46) is fixedly mounted on the bottom of the inner wall of the battery box (41), the sealing plate (47) is slidably mounted on the inner wall of the inflatable cylinder (46), a circular hole is provided on the circumferential surface of the inflatable cylinder (46), the telescopic rod (48) is fixedly mounted on the top of the sealing plate (47), the free end of the telescopic rod (48) is fixedly mounted on the bottom of the sliding plate (42), the blocking plate (49) is fixedly mounted on the bottom of the sealing plate (47), and a circular hole is provided on the surface of the blocking plate (49).

2. A lithium battery protection board with good shock resistance according to claim 1, characterized in that: A No. 1 spring is provided between the sealing plate (47) and the inflation cylinder (46), and the blocking plate (49) is in contact with the inflation cylinder (46).

3. A lithium battery protection board with good shock resistance according to claim 2, characterized in that: The limiting device comprises: a circular column (51), a support plate (52), a transmission block (53), a triangular rod (54), a hollow cylinder (55) and a piston (56); the circular column (51) is fixedly mounted on one end of the connecting shaft (45) close to the baffle plate (7); the support plate (52) is fixedly mounted on the circumferential surface of the circular column (51); the transmission block (53) is fixedly mounted on the bottom of the support plate (52); the triangular rod (54) is fixedly mounted on the bottom of the support plate (52); the hollow cylinder (55) is fixedly mounted between the baffle plate (7) and the battery box (41); and the piston (56) is slidably mounted on the inner wall of the hollow cylinder (55).

4. A lithium battery protection board with good shock resistance according to claim 3, characterized in that: The limiting device further comprises: a connecting rod (57), a transmission bevel block (58), a sliding block (59) and a friction rod (510); the connecting rod (57) slides through the inner and outer walls of the hollow cylinder (55); one end of the connecting rod (57) close to the inner wall of the hollow cylinder (55) is fixedly mounted on a side of the piston (56) close to the baffle (7); the transmission bevel block (58) is fixedly mounted on an end of the connecting rod (57) away from the piston (56); a sliding groove is provided on the surface of the transmission bevel block (58); one end of the sliding block (59) is fixedly mounted on the bottom of the triangular rod (54); the other end of the sliding block (59) is slidably mounted on the inner wall of the sliding groove; and the friction rod (510) is fixedly mounted on a side of the piston (56) away from the connecting rod (57).

5. A lithium battery protection board with good shock resistance according to claim 4, characterized in that: A contact hole is provided on the surface of the battery box (41), and a No. 2 spring is provided between the slider (59) and the sliding groove.

6. A lithium battery protection board with good shock resistance according to claim 5, characterized in that: The unlocking device comprises: a friction block (61), a suction cup (62), a hollow rod (63) and an air outlet (64); the friction block (61) is fixedly mounted on an end of the friction rod (510) away from the piston (56); the suction cup (62) is fixedly mounted on an end of the friction block (61) away from the piston (56); the hollow rod (63) slides through the inner and outer walls of the friction rod (510); and the air outlet (64) is formed on the circumferential surface of the hollow rod (63).

7. A lithium battery protection board with good shock resistance according to claim 6, characterized in that: The unlocking device further comprises: a square block (65), a long rod (66), a reset block (67) and an unlocking block (68); the square block (65) is fixedly mounted on the circumferential surface of the hollow rod (63); the long rod (66) rotatably penetrates the outer shell (1) and the inner and outer walls of the hollow cylinder (55); the reset block (67) is fixedly mounted on one end of the long rod (66); and the unlocking block (68) is fixedly mounted on the other end of the long rod (66).

8. A lithium battery protection board with good shock resistance according to claim 7, characterized in that: A return spring is provided between the long rod (66) and the housing (1), and the unlocking block (68) is in contact with the square block (65).

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