Lithium battery protection assembly and solid-state lithium battery

Abstract

The invention discloses a lithium battery protection assembly and a solid-state lithium battery, and relates to the technical field of battery protection, the lithium battery protection assembly comprises a box body, a plurality of transmission assemblies and a plurality of linkage assemblies, the box body is internally provided with a plurality of lithium battery packs, and the top of each lithium battery pack is symmetrically provided with a threaded positive pole and a threaded negative pole; the threaded positive pole and the threaded negative pole are both in threaded connection with nuts, the two sides of each lithium battery pack are both horizontally and reversely connected with a clamping plate in a sliding mode, the sides, close to each other, of the two clamping plates are both provided with sensors, the bottom of each lithium battery pack is both horizontally and slidably connected with a supporting plate, and a plurality of anti-explosion grooves are formed in the box body; the explosion-proof grooves are in one-to-one correspondence with the lithium battery packs, the transmission assemblies are driven by sliding of the corresponding supporting plates to enable the two clamping plates to slide reversely, and the linkage assemblies are driven by reverse sliding of the two clamping plates to enable two nuts on the corresponding lithium battery packs to rotate.

Description

Technical Field

[0001] The present invention relates to the technical field of battery protection, in particular to a lithium battery protection component and a solid-state lithium battery. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Lithium batteries have gradually become the mainstream of power batteries due to their advantages such as small size and light weight, high energy and power, low self-discharge rate, environmental protection and long service life.

[0003] For example, the Chinese patent with publication number CN107331906A and titled "A Lithium Battery High-Temperature Protection Structure and Lithium Battery" includes a lithium battery Block frame, a KSD temperature switch, a short-circuit overcurrent connector and a thermal conductive layer; the lithium battery Block frame is a frame-shaped structure used to fix the battery body, including positive and negative poles connecting the positive and negative poles of the battery body and an inner card slot; the short-circuit overcurrent connector is a conductor, fixed in the card slot on the inner side of the lithium battery Block frame, and the short-circuit overcurrent connector connects the positive pole and the negative pole of the lithium battery Block frame to the KSD temperature switch respectively; the KSD temperature switch is installed on the lithium battery Block frame, is a normally open type with a fixed temperature closing function; the thermal conductive layer is attached to the surface of the battery body and contacts the temperature sensing point of the KSD temperature switch. The present invention has the functions of temperature recognition and over-temperature triggering safe short circuit, so that the lithium battery releases heat gently during thermal runaway, and will not catch fire or explode, thereby achieving the function of high-temperature protection of the lithium battery.

[0004] Although the lithium battery high temperature protection structure and lithium battery in the above patent are practical and convenient, they also have shortcomings. During long-term use, the lithium battery will bulge, but the user rarely notices the bulging phenomenon of the lithium battery. Only when the lithium battery expands the outer shell will it be discovered that the lithium battery has bulged. The bulging of the lithium battery will pose a certain risk of explosion. Summary of the invention

[0005] The object of the present invention is to provide a lithium battery protection component and a solid-state lithium battery to solve the deficiencies in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: The lithium battery protection assembly includes a box body, a plurality of transmission components, and a plurality of linkage components. A plurality of lithium battery packs are provided in the box body. Threaded positive electrode posts and threaded negative electrode posts are symmetrically provided at the top of each lithium battery pack. A nut is screwed onto each of the threaded positive electrode posts and the threaded negative electrode posts. A clamping plate is horizontally and reversely slidably connected to both sides of each lithium battery pack. Sensors are provided on one side of the two clamping plates close to each other. A support plate is horizontally slidably connected to the bottom of each lithium battery pack. A plurality of explosion-proof grooves are provided in the box body. Each explosion-proof groove corresponds to a lithium battery pack and is located below the lithium battery pack. The number of each transmission component is the same as and corresponds to the number of support plates. Each transmission component is driven by the sliding of the corresponding support plate to make the two clamping plates slide reversely. The number of each linkage component is the same as and corresponds to the number of lithium battery packs. Each linkage component is driven by the reverse sliding of the two clamping plates to make the two nuts on the corresponding lithium battery pack rotate.

[0007] Further, each of the transmission components includes two transmission units. Each of the two transmission units includes a second bevel gear, a helical rack engaged with the second bevel gear, and two first connecting rods. The second bevel gear is vertically rotatably connected in the box body. The helical rack is provided on the corresponding support plate. One end of each of the two first connecting rods away from each other is hinged to the two clamping plates respectively. One end of each of the two first connecting rods close to each other is hinged to one end of the second bevel gear.

[0008] Further, each of the linkage components includes two linkage units. Each of the two linkage units includes a first bevel gear, a rotating rod, a first gear body, a second gear body engaged with the first gear body, and a support plate. The second gear body is slidably sleeved on the rotating rod. The support plate is provided at the bottom end of the second gear body, and the top of the support plate is in contact with the bottom of the first gear body. An elastic unit is provided between the second gear body and the rotating rod. The first bevel gear is coaxially and fixedly connected to the bottom of the rotating rod. The two first gear bodies are sleeved corresponding to the two nuts respectively. The two first bevel gears are engaged with the two second bevel gears correspondingly.

[0009] Further, the elastic unit includes a first spring, a protrusion, and a guide rod. A guide groove is vertically opened on the rotating rod. The guide rod is vertically arranged in the guide groove. A protrusion is provided in the second gear body. The protrusion is sleeved on the guide rod. The protrusion is slidably connected to the guide groove. The first spring is sleeved on the guide rod. Two ends of the first spring are respectively fixedly connected to the protrusion and the groove wall of the guide groove.

[0010] Further, a plurality of placement grooves for placing lithium battery packs are formed in the box body. Each placement groove corresponds to one explosion-proof groove. A through hole is formed between each placement groove and the corresponding explosion-proof groove. Each support plate horizontally slides corresponding to each through hole. The width of each through hole is larger than the width of the lithium battery pack.

[0011] Further, a sand storage groove is formed on one side of each explosion-proof groove. An outlet is formed between the sand storage groove and the explosion-proof groove. A trigger assembly is arranged in each explosion-proof groove. The trigger assembly includes a pressing block, a blocking block and a sliding rod. The pressing block is vertically slidably connected in the explosion-proof groove. The top of the pressing block is in abutting fit with the bottom of the lithium battery pack. A sliding groove is horizontally formed in the box body. The sliding rod is horizontally slidably connected in the sliding groove. One end of the sliding rod close to the pressing block is inclined. The bottom of the pressing block is slidably abutted against one end of the sliding rod. The blocking block is vertically slidably connected in the outlet. The second connecting rod is respectively hinged to the bottom of the blocking block and the top of the sliding rod.

[0012] Further, a telescopic rod is arranged between the sliding groove and the sliding rod. A second spring is sleeved on the telescopic rod. Two ends of the second spring are respectively fixedly connected to the groove wall of the sliding groove and the sliding rod.

[0013] The present invention also provides a solid-state lithium battery, including the above-mentioned lithium battery protection assembly.

[0014] Compared with the prior art, the beneficial effects provided by the present invention are as follows: When a certain lithium battery pack bulges, the support plate slides to gradually cancel the supporting force on the lithium battery pack. At the same time, the two clamping plates are driven to slide reversely through the transmission assembly to release the clamping and fixing of the lithium battery pack. The nuts on the threaded positive electrode post and the threaded negative electrode post of the lithium battery pack are unscrewed through the linkage assembly to release the connection with the lithium battery pack. Finally, the lithium battery pack falls into the lower explosion-proof groove, and the sand in the sand storage groove flows into the explosion-proof groove through the trigger assembly, so that the bulged lithium battery pack can be isolated separately, and the explosion and fire of the lithium battery pack can be avoided. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0016] Figure 1 It is an explosion diagram between the box body and the protective cover provided by the embodiment of the present invention; Figure 2 It is a partial structural diagram provided by the embodiment of the present invention; Figure 3 ForFigure 1 Schematic diagram of the structure from another perspective; Figure 4 is Figure 3 the sectional view at A-A in Figure 5 is Figure 4 the enlarged view at B in Figure 6 is Figure 4 the enlarged view at C in Figure 7 Schematic diagram of the structure of the second gear body provided by the embodiment of the present invention; Figure 8 Schematic diagram of the structure of the transmission assembly provided by the embodiment of the present invention; Figure 9 is Figure 3 the sectional view at D-D in Figure 10 is Figure 9 the enlarged view at E in

[0017] Explanation of reference numerals: 1, box body; 2, protective cover; 3, placement groove; 4, lithium battery pack; 5, clamping plate; 6, threaded positive electrode post; 7, threaded negative electrode post; 8, first gear body; 9, second gear body; 10, protrusion; 11, support plate; 12, guide groove; 13, guide rod; 14, first spring; 15, first bevel gear; 16, second bevel gear; 17, helical rack; 18, support plate; 19, first connecting rod; 20, explosion-proof groove; 21, sand storage groove; 22, extrusion block; 23, sliding rod; 24, telescopic rod; 25, second spring; 26, chute; 27, second connecting rod; 28, stop block; 29, outlet; 30, rotating rod. Detailed implementation manners

[0018] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Please refer to Figure 1-10, a technical solution provided by an embodiment of the present invention: The lithium battery protection assembly includes a box body 1, a plurality of transmission components, and a plurality of linkage components. A plurality of lithium battery packs 4 are provided in the box body 1. Threaded positive electrode posts 6 and threaded negative electrode posts 7 are symmetrically provided at the top of each lithium battery pack 4. A nut is screwed on each of the threaded positive electrode post 6 and the threaded negative electrode post 7. A clamping plate 5 is horizontally and reversely slidably connected to both sides of each lithium battery pack 4. Sensors are provided on one side of the two clamping plates 5 close to each other. Specifically, the sensors are pressure sensors. The specific model specifications need to be selected according to the actual specifications of the device, etc., so they will not be elaborated in detail. A plurality of electric push rods are provided in the box body 1, and the output ends of each electric push rod are fixedly connected to one side of each support plate 18 in a one-to-one correspondence. Both sensors are signal-connected to the electric push rods. A support plate 18 is horizontally slidably connected to the bottom of each lithium battery pack 4. A plurality of explosion-proof grooves 20 are provided in the box body 1. Each explosion-proof groove 20 corresponds to a lithium battery pack 4 and is located below the lithium battery pack 4. The number of each transmission component is the same as and corresponds to the number of support plates 18. Each transmission component receives the drive of the corresponding support plate 18 to slide so that the two clamping plates 5 slide reversely. The number of each linkage component is the same as and corresponds to the number of lithium battery packs 4. Each linkage component receives the drive of the two clamping plates 5 to slide reversely so that the two nuts on the corresponding lithium battery pack 4 rotate. Specifically, the two nuts are used to fix the wires. A protective cover 2 is covered on the top of the box body 1. When one side of a certain lithium battery pack 4 bulges, the corresponding sensor drives the electric push rod to drive the corresponding support plate 18 to move horizontally, so as to facilitate canceling the supporting force on the corresponding lithium battery pack 4, making it fall into the explosion-proof groove 20 below and being isolated from other lithium battery packs 4, avoiding the explosion and fire from spreading to other lithium battery packs 4.

[0020] As a preferred technical solution, each transmission component includes two transmission units. Each of the two transmission units includes a second bevel gear 16, a helical rack 17 meshing with the second bevel gear 16, and two first connecting rods 19. The second bevel gear 16 is vertically rotatably connected to the box body 1. The helical rack 17 is arranged on the corresponding support plate 18. The two ends of the two first connecting rods 19 away from each other are respectively hinged to the two clamping plates 5. The two ends of the two first connecting rods 19 close to each other are both hinged to one end of the second bevel gear 16. Specifically, a plurality of placement grooves 3 for placing the lithium battery packs 4 are provided in the box body 1. Each placement groove 3 corresponds to each explosion-proof groove 20 one by one. A through hole is provided between each placement groove 3 and the corresponding explosion-proof groove 20. Each support plate 18 horizontally slides corresponding to each through hole. The width of each through hole is larger than the width of the lithium battery pack 4, so as to adapt to the width of the bulged lithium battery pack 4, and enable the bulged lithium battery pack 4 to pass through the through hole and fall into the explosion-proof groove 20. Two cylinders are vertically and symmetrically fixedly connected to one end of the second bevel gear 16 close to the lithium battery pack 4. The two ends of the two first connecting rods 19 close to each other are respectively sleeved on the two cylinders. Two connecting columns are horizontally and symmetrically arranged on one side of the two clamping plates 5. The two ends of the two first connecting rods 19 away from each other are respectively sleeved on the two connecting columns. The horizontal movement of the support plate 18 drives the horizontal displacement of the helical rack 17. The helical rack 17 meshes with the second bevel gear 16 for transmission. Both clamping plates 5 are in contact with the groove wall of the placement groove 3, so that the two clamping plates 5 can only move linearly. The rotation of the second bevel gear 16 makes the two cylinders gradually tend to be horizontal, and the two clamping plates 5 are pushed away from each other through the two first connecting rods 19, releasing the clamping and fixing of the lithium battery pack 4. At the same time, the area of the through hole communicating with the placement groove 3 is gradually enlarged, so that the bulged lithium battery pack 4 can pass through the through hole and fall into the explosion-proof groove 20.

[0021] As a preferred technical solution, each linkage component includes two linkage units. Each of the two linkage units includes a first bevel gear 15, a rotating rod 30, a first gear body 8, a second gear body 9 meshing with the first gear body 8, and a support plate 11. The second gear body 9 is slidably sleeved on the rotating rod 30. The support plate 11 is arranged at the bottom of the second gear body 9, and the top of the support plate 11 is in contact with the bottom of the first gear body 8. An elastic unit is provided between the second gear body 9 and the rotating rod 30. The first bevel gear 15 is coaxially and fixedly connected to the bottom of the rotating rod 30. The two first gear bodies 8 are sleeved corresponding to the two nuts respectively. The two first bevel gears 15 are meshingly connected with the two second bevel gears 16 correspondingly. Specifically, the elastic unit includes a first spring 14, a protrusion 10, and a guide rod 13. A guide groove 12 is vertically formed on the rotating rod 30. The guide rod 13 is vertically arranged in the guide groove 12. A protrusion 10 is provided in the second gear body 9. The protrusion 10 is sleeved on the guide rod 13. The protrusion 10 is slidably connected with the guide groove 12. The first spring 14 is sleeved on the guide rod 13. The two ends of the first spring 14 are respectively fixedly connected with the protrusion 10 and the groove wall of the guide groove 12. The second bevel gear 16 drives the rotating rod 30 to rotate through meshing transmission with the first bevel gear 15. When the rotating rod 30 is driven to rotate, through the fitting of the protrusion 10 and the guide groove 12, the rotating rod 30 drives the second gear body 9 to rotate. The second gear body 9 drives the first gear body 8 to rotate. The first gear body 8 drives the nut to rotate, unscrewing the nuts on the threaded positive electrode post 6 and the threaded negative electrode post 7 of the lithium battery pack 4, disconnecting the connection with the lithium battery pack 4, and performing a power-off process. This can prevent the upper wire from still being connected to the lithium battery pack 4 during the falling process of the lithium battery pack 4, hindering the lithium battery pack 4 from falling into the explosion-proof tank 20. Moreover, the guide rod 13 enables the second gear body 9 to only move in the vertical direction relative to the rotating rod 30. Through the elastic deformation of the first spring 14, the second gear body 9 is driven to move upward, and the support plate 11 ensures that the second gear body 9 and the first gear body 8 move synchronously in the vertical direction and do not disengage from the meshing with the first gear body 8.

[0022] As a preferred technical solution, a sand storage groove 21 is provided on one side of each explosion-proof groove 20. An outlet 29 is provided between the sand storage groove 21 and the explosion-proof groove 20. A trigger assembly is provided in each explosion-proof groove 20. The trigger assembly includes a pressing block 22, a stop block 28 and a sliding rod 23. The pressing block 22 is vertically slidably connected in the explosion-proof groove 20. The top of the pressing block 22 is in abutting cooperation with the bottom of the lithium battery pack 4. A chute 26 is horizontally provided in the box body 1. The sliding rod 23 is horizontally slidably connected in the chute 26. One end of the sliding rod 23 close to the pressing block 22 is inclined. The bottom of the pressing block 22 is in sliding abutment with one end of the sliding rod 23. The stop block 28 is vertically slidably connected in the outlet 29. The second connecting rod 27 is respectively hinged to the bottom of the stop block 28 and the top of the sliding rod 23. Specifically, when the faulty lithium battery pack 4 is disconnected from the upper wire connection and the lower support plate 18 and falls into the corresponding explosion-proof groove 20, the bottom of the lithium battery pack 4 fits with the pressing block 22. The pressing block 22 is driven to move downward by the gravity of the lithium battery pack 4. The bottom of the pressing block 22 fits with the inclined end of the sliding rod 23, driving the sliding rod 23 to slide horizontally. Hinge seats are provided at the top of the sliding rod 23 and the bottom of the stop block 28. Two ends of the second connecting rod 27 are respectively hinged to the two hinge seats. A groove is vertically provided in the box body 1 and runs through the opening. The stop block 28 is vertically slidably connected in the groove. The top of the second connecting rod 27 gradually moves downward, driving the stop block 28 to move downward to open the opening. The sand in the sand storage groove 21 pours into the explosion-proof groove 20 by its own gravity. If the battery catches fire accidentally, the sand can cover the surface, temporarily isolate oxygen, inhibit the spread of fire, and prevent the surrounding flammable materials from being ignited when the battery burns. If the battery leaks accidentally, the sand grains can adsorb a small amount of electrolyte and reduce diffusion pollution.

[0023] As a preferred technical solution, a telescopic rod 24 is provided between the chute 26 and the sliding rod 23. A second spring 25 is sleeved on the telescopic rod 24. Two ends of the second spring 25 are respectively fixedly connected to the groove wall of the chute 26 and the sliding rod 23. Specifically, after the faulty lithium battery pack 4 and the sand are cleaned, the elastic deformation of the second spring 25 can drive the sliding rod 23 to move in the reverse direction, so that the sliding rod 23 and the pressing block 22 are reset to the initial state for the next use.

[0024] The present invention also provides a solid-state lithium battery, including the above-mentioned lithium battery protection component.

[0025] Working principle: When a certain lithium battery pack 4 bulges, the corresponding sensor drives the electric push rod to drive the corresponding support plate 18 to move horizontally. The support plate 18 slides to gradually cancel the supporting force on the lithium battery pack 4. The horizontal movement of the support plate 18 drives the inclined rack 17 to move horizontally. The inclined rack 17 meshes with the second bevel gear 16 for transmission. Both clamping plates 5 are in contact with the groove walls of the placement groove 3, so that both clamping plates 5 can only move linearly. The rotation of the second bevel gear 16 makes the two cylinders gradually tend to be horizontal. The two first connecting rods 19 push the two clamping plates 5 away from each other, releasing the clamping and fixing of the lithium battery pack 4. At the same time, the area of the through hole communicating with the placement groove 3 is gradually enlarged, facilitating the bulged lithium battery pack 4 to pass through the through hole and fall into the explosion-proof groove 20. The second bevel gear 16 drives the rotating rod 30 to rotate through meshing transmission with the first bevel gear 15. By the fitting of the protrusion 10 and the guiding groove 12, the rotating rod 30 drives the second gear body 9 to rotate. The second gear body 9 drives the first gear body 8 to rotate. The first gear body 8 drives the nut to rotate, unscrewing the nuts on the threaded positive electrode post 6 and the threaded negative electrode post 7 of the lithium battery pack 4, releasing the connection with the lithium battery pack 4, and performing a power-off process to prevent the upper wire from still being connected to the lithium battery pack 4 during the falling process of the lithium battery pack 4, hindering the lithium battery pack 4 from falling into the explosion-proof groove 20. Finally, the lithium battery pack 4 falls into the explosion-proof groove 20 below. When the faulty lithium battery pack 4 is disconnected from the upper wire and the support of the lower support plate 18 and falls into the corresponding explosion-proof groove 20, the bottom of the lithium battery pack 4 is in contact with the extrusion block 22. The gravity of the lithium battery pack 4 drives the extrusion block 22 to move downward. The bottom of the extrusion block 22 is in contact with the inclined end of the sliding rod 23, driving the sliding rod 23 to slide horizontally. The top of the second connecting rod 27 gradually moves downward, driving the stopper 28 to move downward, opening the opening. The sand in the sand storage groove 21 pours into the explosion-proof groove 20 by its own gravity, which can prevent the lithium battery pack 4 from exploding and catching fire and avoid the explosion affecting other lithium battery packs 4.

[0026] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A lithium battery protection component, comprising a box (1), wherein a plurality of lithium battery packs (4) are arranged in the box (1), a threaded positive pole (6) and a threaded negative pole (7) are symmetrically arranged on the top of each lithium battery pack (4), a nut is screwed on each of the threaded positive pole (6) and the threaded negative pole (7), both sides of each lithium battery pack (4) are horizontally and reversely slidably connected to a clamping plate (5), a sensor is arranged on the side close to the two clamping plates (5), and a support plate (18) is horizontally and slidably connected to the bottom of each lithium battery pack (4), wherein a plurality of explosion-proof grooves (20) are arranged in the box (1), each of the explosion-proof grooves (20) corresponds to a lithium battery pack (4) one by one and is located below the lithium battery pack (4), characterized in that: Also includes: A plurality of transmission components, the number of each transmission component being the same as the number of the support plates (18) and corresponding one to one, each transmission component being driven by the corresponding support plate (18) to slide so that the two clamping plates (5) slide in opposite directions; A plurality of linkage components, the number of each linkage component is the same as the number of lithium battery packs (4) and corresponds one to one, and each linkage component is driven by the two clamping plates (5) to slide in the opposite direction so as to rotate the two nuts on the corresponding lithium battery pack (4).

2. A lithium battery protection assembly according to claim 1, characterized in that: Each of the transmission assemblies comprises two transmission units, and the two transmission units comprise a second bevel gear (16), a helical rack (17) meshing with the second bevel gear (16), and two first connecting rods (19). The second bevel gear (16) is vertically rotatably connected in the housing (1), the helical rack (17) is arranged on a corresponding support plate (18), and the ends of the two first connecting rods (19) that are away from each other are respectively hinged to the two clamping plates (5), and the ends of the two first connecting rods (19) that are close to each other are both hinged to one end of the second bevel gear (16).

3. A lithium battery protection assembly according to claim 2, characterized in that: Each linkage assembly comprises two linkage units, and the two linkage units comprise a first bevel gear (15), a rotating rod (30), a first gear body (8), a second gear body (9) meshing with the first gear body (8), and a support plate (11); the second gear body (9) is slidably sleeved on the rotating rod (30); the support plate (11) is arranged at the bottom end of the second gear body (9), and the top of the support plate (11) is in contact with the bottom of the first gear body (8); an elastic unit is arranged between the second gear body (9) and the rotating rod (30); the first bevel gear (15) is coaxially fixedly connected with the bottom of the rotating rod (30); the two first gear bodies (8) are sleeved with two nuts in a one-to-one correspondence; and the two first bevel gears (15) are meshed with the two second bevel gears (16) in a one-to-one correspondence.

4. A lithium battery protection assembly according to claim 3, characterized in that: The elastic unit comprises a first spring (14), a protrusion (10) and a guide rod (13); a guide groove (12) is vertically provided on the rotating rod (30); the guide rod (13) is vertically arranged in the guide groove (12); a protrusion (10) is provided in the second gear body (9); the protrusion (10) is sleeved on the guide rod (13); the protrusion (10) is slidably connected to the guide groove (12); the first spring (14) is sleeved on the guide rod (13); two ends of the first spring (14) are respectively fixedly connected to the protrusion (10) and the groove wall of the guide groove (12).

5. A lithium battery protection assembly according to claim 1, characterized in that: The box body (1) is provided with a plurality of placement slots (3) for placing lithium battery packs (4), each of the placement slots (3) corresponds to each explosion-proof slot (20) one by one, a through hole is provided between each of the placement slots (3) and the corresponding explosion-proof slot (20), each of the support plates (18) slides horizontally one by one in correspondence with each through hole, and the width of each through hole is greater than the width of the lithium battery pack (4).

6. A lithium battery protection assembly according to claim 1, characterized in that: A sand storage groove (21) is provided on one side of each explosion-proof groove (20), an outlet (29) is provided between the sand storage groove (21) and the explosion-proof groove (20), a trigger assembly is provided in each explosion-proof groove (20), and each trigger assembly comprises an extrusion block (22), a stopper (28) and a slide bar (23), the extrusion block (22) is vertically slidably connected in the explosion-proof groove (20), and the top of the extrusion block (22) abuts against the bottom of the lithium battery pack (4) In cooperation, a slide groove (26) is horizontally provided in the box body (1), the slide rod (23) is horizontally slidably connected in the slide groove (26), the end of the slide rod (23) close to the extrusion block (22) is inclined, the bottom of the extrusion block (22) is slidably abutted against one end of the slide rod (23), the stopper (28) is vertically slidably connected in the outlet (29), and the second connecting rod (27) is hinged to the bottom of the stopper (28) and the top of the slide rod (23) respectively.

7. A lithium battery protection assembly according to claim 6, characterized in that: A telescopic rod (24) is provided between the slide groove (26) and the slide rod (23), a second spring (25) is sleeved on the telescopic rod (24), and two ends of the second spring (25) are respectively fixedly connected to the groove wall of the slide groove (26) and the slide rod (23).

8. A solid-state lithium battery, characterized in that: It comprises a lithium battery protection component as described in any one of claims 1 to 7.

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