Safety protection device for lithium ion battery

Abstract

The utility model discloses a safety protection device for a lithium ion battery. The safety protection device comprises a lithium ion battery pack protection box body, the lithium ion battery pack protection box comprises a protection box body, the interior of the protection box body is divided into a plurality of limiting spaces used for containing lithium ion battery packs from top to bottom through a plurality of bearing plates, a fireproof sticker is attached to at least one side face of each lithium ion battery pack, and a limiting mechanism is arranged on each bearing plate. A plurality of positioning mechanisms corresponding to the limiting mechanisms in position are arranged on the side, facing the putting-in direction of the lithium ion battery pack, of the inner wall of the protection box body, and the lithium ion battery pack is limited to move at the position perpendicular to or parallel to the putting-in direction of the lithium ion battery pack through the positioning mechanisms and the limiting mechanisms. According to the lithium ion battery pack, the fireproof sticker is arranged on at least one side surface of the lithium ion battery pack, so that the lithium ion battery pack can be controlled to generate open fire from the source, and the fire risk caused by the abnormity of the lithium ion battery is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, and in particular to a lithium-ion battery safety protection device. Background Technology

[0002] A lithium-ion battery pack is a primary battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. It differs from rechargeable lithium-ion batteries and lithium-ion polymer batteries. Due to the highly reactive chemical properties of lithium metal, its processing, storage, and use require stringent environmental conditions. Therefore, lithium-ion battery packs were not widely used for a long time. However, with the development of microelectronics technology in the late 20th century, the increasing miniaturization of devices placed higher demands on power supplies, leading to the large-scale practical application of lithium-ion battery packs. Lithium-ion batteries, due to their long cycle life, safety, environmental friendliness, and high energy density, are now widely used in digital communication equipment, power tools, electric vehicles, and other fields.

[0003] Currently, after lithium-ion battery packs are manufactured, they are placed on dedicated support brackets for unified transportation. However, in actual work, it has been found that although the support brackets currently used can effectively meet the needs of supporting and positioning lithium-ion battery packs, they lack effective heat insulation, flame retardancy, and fire extinguishing capabilities. As a result, when one lithium-ion battery pack catches fire due to malfunction or other reasons, the fire can easily spread rapidly and ignite a large number of surrounding lithium-ion battery packs, causing serious losses.

[0004] Therefore, there is a need to provide a lithium-ion battery safety protection device to solve the above problems. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a lithium-ion battery safety protection device with good load-bearing capacity, capable of transporting multiple lithium-ion battery packs at once, improving the safety and stability of lithium-ion battery pack transportation, and reducing the transportation costs for enterprises.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a lithium-ion battery safety protection device, comprising a lithium-ion battery pack protective box; the lithium-ion battery pack protective box includes a protective box body, the interior of which is divided into several defined spaces for placing lithium-ion battery packs from top to bottom by multiple support plates, and at least one side of each lithium-ion battery pack is affixed with a fireproof sticker.

[0007] Each of the carrier plates is provided with a limiting mechanism. The inner wall of the protective box is provided with multiple positioning mechanisms corresponding to the positions of the limiting mechanisms on the side facing the lithium-ion battery pack insertion direction. The positioning mechanisms and limiting mechanisms are used to restrict the movement of the lithium-ion battery pack in a position perpendicular or parallel to its insertion direction.

[0008] Furthermore, the limiting mechanism includes clamping plates and handles that are vertically arranged on both sides of the bearing plate in the width direction. One end of the handle passes through the side wall of the protective box and is fixedly connected to the clamping plate. An elastic element is sleeved on the part of the handle located between the clamping plate and the inner wall of the protective box.

[0009] Furthermore, the handle is arranged horizontally in a U-shape, and at least one guide rail is provided on the upper surface of the support plate along its length. The clamping plate has guide grooves that cooperate with the guide rails. The U-shaped handle makes it easy for the user to pull and quickly adjust the relative position between the two clamping plates; the guide rails provide guidance for the movement of the clamping plates, so that they can stably clamp both sides of the lithium-ion battery pack after movement.

[0010] Furthermore, the positioning mechanism includes a vacuum suction cup, the suction end of which penetrates the inner wall of the protective box and extends away from the protective box. The vacuum suction cup adsorbs the lithium-ion battery pack resting against it from the rear, thus limiting the battery pack's movement in the front-to-back direction. Through the cooperation of this positioning mechanism and the limiting mechanism, the lithium-ion battery pack can be moved in both the front-to-back and left-to-right directions, ensuring that the battery pack does not move randomly within the protective box during transportation. This effectively prevents collisions and ensures efficient transportation of the lithium-ion battery pack.

[0011] Furthermore, it also includes an emergency fire-fighting mechanism, which comprises an emergency cabinet located on the side of the protective enclosure. The emergency cabinet contains a gas cylinder, the cylinder's opening of which is connected to a main fire extinguishing pipe. Several branch fire extinguishing pipes are arranged in parallel along the main pipe, each branch pipe passing through the protective enclosure and extending into its interior, with a fire extinguishing nozzle at one end. When a lithium-ion battery pack inside the protective enclosure catches fire, the gas cylinder activates, dispersing the inert gas within it through the main fire extinguishing pipe to the branch fire extinguishing pipes located in the designated spaces where the lithium-ion battery packs are stored on each layer, extinguishing the fire promptly. The designated spaces for adjacent lithium-ion battery packs are separated by support plates, preventing damage and combustion of surrounding lithium-ion battery packs due to the spread of fire while simultaneously extinguishing the fire.

[0012] Furthermore, it also includes an openable protective door, which is equipped with an alarm and a temperature sensor. At least one smoke sensor is installed inside the protective enclosure. The alarm, temperature sensor, and smoke sensor are all electrically connected to an external controller.

[0013] Each layer of the lithium-ion battery pack storage area is equipped with a temperature sensor. This temperature sensor can detect the temperature of each layer inside the protective enclosure in a timely manner. When the temperature is too high, it indicates that there is an abnormality in the storage of the lithium-ion battery packs in that layer, posing a fire risk. The risk signal is accurately detected by the smoke sensor and then transmitted to the external controller. The external controller can then activate the alarm to help staff detect fire hazards in a timely manner.

[0014] Furthermore, a buffer mechanism is provided at the bottom of the protective box. The buffer mechanism includes a hinge frame fixed to the lower surface of the protective box. Two parallel adjusting plates are hinged on the hinge frame. The ends of the adjusting plates away from the hinge frame are respectively connected to the hinge guide rods through a hinge seat. The hinge guide rods pass through the two hinge seats and are fixed at both ends to the base. The portion of the hinge guide rod between the adjusting plate and the base is fitted with an elastic element.

[0015] When encountering uneven road surfaces during transportation, it can effectively prevent the bottom of the protective box from directly impacting the transport vehicle, thereby preventing damage to the protective box and the lithium-ion battery pack inside, and ensuring the service life of the protective box.

[0016] Furthermore, both ends of the hinge along its length are connected to the lower surface of the protective enclosure via connecting seats. The hinge frame consists of two hinge rods, and a movable guide rod is vertically installed at each of the four corners of the lower surface of the protective enclosure. One end of each movable guide rod is located within a guide sleeve at one of the four corners of the base. By setting the movable guide rods and guide sleeves, the vertical movement of the protective enclosures is buffered and guided, preventing collisions and damage when multiple protective enclosures are placed side by side, thus effectively improving the service life of the protective enclosures.

[0017] Furthermore, the top of the protective enclosure is equipped with at least one cooling fan, and a protective frame is connected to its upper surface via support columns. The cooling fan dissipates heat from the lithium-ion battery pack at high temperatures while keeping the interior of the protective enclosure dry, preventing damage to the lithium-ion battery pack caused by moisture inside the enclosure and thus avoiding losses for the company. This effectively improves the storage efficiency of the lithium-ion battery pack.

[0018] The protective frame prevents rainwater from entering the protective enclosure through the cooling fan even in open-air environments, thus protecting the lithium-ion battery pack from damage caused by rainwater immersion and ensuring the lifespan of the lithium-ion battery pack.

[0019] Furthermore, the surface of the support plate is covered with a PVC flame-retardant layer, and a locking mechanism is provided on the openable side of the protective door. This locking mechanism includes a locking block, which is L-shaped. When the protective door is closed, one end of the locking block is locked to the side wall of the protective enclosure using locking screws. If a fire occurs in one of the designated spaces for storing lithium-ion battery packs, the support plate can initially prevent the fire from spreading, thus avoiding impact on other lithium-ion battery packs in the designated spaces and preventing further damage.

[0020] The locking mechanism ensures that the protective door remains closed even when tilted or tipped over, thus not affecting the storage of the lithium-ion battery pack inside the protective enclosure.

[0021] The beneficial effects of this utility model are:

[0022] 1. This utility model has good load-bearing capacity by setting multiple support plates from top to bottom inside the protective box, which can transport multiple lithium-ion battery packs at one time;

[0023] 2. In this utility model, the bearing plate is provided with limiting mechanisms on both sides parallel to the direction in which the lithium-ion battery pack is placed, which can clamp and limit the movement of the lithium-ion battery pack in the left and right directions within the protective box. Multiple positioning mechanisms are provided on the inner wall of the protective box facing the direction in which the lithium-ion battery pack is placed, which restrict the movement of the lithium-ion battery pack in the front and back directions. Through the cooperation of the positioning mechanism and the limiting mechanism, the safety and stability of the lithium-ion battery pack during transportation are ensured, and it is prevented from being squeezed and damaged due to collision during transportation, effectively reducing the transportation costs of enterprises.

[0024] 3. By providing a fireproof sticker on at least one side of the lithium battery pack, this utility model can control the generation of open flames in the lithium battery pack at the source, greatly reducing the risk of fire caused by abnormal lithium-ion battery. Attached Figure Description

[0025] Figure 1 This is an axonometric view of the overall structure of an embodiment of the present invention;

[0026] Figure 2 This is a partial front view of an embodiment of the present utility model;

[0027] Figure 3 This is a partial cross-sectional schematic diagram of an embodiment of the present invention;

[0028] Figure 4 This is an isometric view of the overall structure of the buffer mechanism according to an embodiment of the present invention;

[0029] Figure 5This is a schematic cross-sectional view of the overall structure of the locking mechanism according to an embodiment of the present invention;

[0030] In the diagram: 1. Protective enclosure; 2. Protective door; 3. Alarm; 4. Temperature sensor; 5. Smoke sensor; 6. Handle; 7. Support plate; 8. Limiting mechanism; 81. Clamping plate; 82. Handle; 83. Elastic element 1; 9. Positioning mechanism; 91. Vacuum suction cup; 92. Air extraction end; 10. Guide rail; 11. Emergency fire-fighting mechanism; 111. Emergency cabinet; 112. Gas cylinder; 113. Fire extinguishing main pipe; 114. Fire extinguishing device. Branch pipe; 115. Fire extinguishing nozzle; 12. Buffer mechanism; 121. Hinge frame; 122. Adjusting plate one; 123. Adjusting plate two; 124. Hinge seat; 125. Base; 126. Hinge guide rod; 127. Elastic element two; 128. Moving guide rod; 129. Guide sleeve; 130. Connecting seat; 13. Cooling fan; 14. Locking mechanism; 141. Locking block; 142. Locking screw; 15. Protective frame. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0032] See appendix Figures 1 to 5 As shown, a lithium-ion battery safety protection device in this embodiment includes a lithium battery pack protection box. The lithium battery pack protection box includes a protection box body 1. The interior of the protection box body 1 is divided into several limited spaces for placing lithium-ion battery packs from top to bottom by multiple support plates 7. The setting of the above-mentioned limited spaces enables the protection box body 1 to have good load-bearing capacity, and can store and transport multiple lithium-ion battery packs at one time, thereby improving the transportation efficiency of lithium-ion battery packs and saving transportation costs for enterprises.

[0033] At least one side of each of the lithium-ion battery packs is affixed with a fire-retardant sticker. In some embodiments, the fire-retardant sticker is disposed on the outer surface of the bare cell inside the lithium-ion battery. The fire-retardant sticker used in this application differs from existing fire-extinguishing stickers; it does not contain fire-extinguishing agents but only reduces the probability of lithium-ion battery ignition at high temperatures. By using the fire-retardant sticker, even if the lithium-ion battery pack experiences thermal runaway, no open flame will be generated. Therefore, the overall fire risk of the battery pack is greatly reduced, thereby providing safety protection for the lithium-ion battery.

[0034] It should be noted that the fireproof sticker can be applied only to the explosion-proof valve area, or it can completely cover the surface of the bare cell inside the lithium-ion battery, leaving only the electrodes exposed.

[0035] Each of the carrier plates 7 is provided with a limiting mechanism 8. The inner wall of the protective box 1 is provided with a plurality of positioning mechanisms 9 corresponding to the positions of the limiting mechanism 8 on the side facing the lithium-ion battery pack insertion direction. The positioning mechanism 9 and the limiting mechanism 8 are used to restrict the movement of the lithium-ion battery pack in a position perpendicular or parallel to its insertion direction.

[0036] In this invention, the support plate 7 is provided with limiting mechanisms 8 on both sides parallel to the direction in which the lithium-ion battery pack is placed, which can clamp and limit the movement of the lithium-ion battery pack in the left and right directions within the protective box 1; multiple positioning mechanisms 9 are provided on the inner wall of the protective box 1 facing the direction in which the lithium-ion battery pack is placed, which restrict the movement of the lithium-ion battery pack in the front and back directions. Through the cooperation of the positioning mechanism 9 and the limiting mechanism 8, the safety and stability of the lithium-ion battery pack during transportation are ensured, and the damage caused by the collision during transportation is effectively avoided, thereby effectively reducing the transportation costs of enterprises.

[0037] In some embodiments, the surface of the support plate 7 is covered with a PVC flame-retardant layer. When a fire occurs in one of the confined spaces used to place the lithium-ion battery pack, the support plate 7 can initially block the fire, preventing it from affecting the lithium-ion battery packs in other confined spaces and avoiding greater losses.

[0038] The limiting mechanism 8 includes clamping plates 81 and handles 82 that are vertically arranged on both sides of the bearing plate 7 in the width direction. One end of the handle 82 passes through the side wall of the protective box 1 and is fixedly connected to the clamping plate 81. An elastic element 83 is sleeved on the part of the handle 82 located between the clamping plate 81 and the inner wall of the protective box 1. The pulling end of the handle 82 is located on the outside of the protective box 1. When the lithium-ion battery pack is placed into the protective box 1, pulling at least one handle 82 located in the same limited space causes at least one clamping plate 81 to move away from the other clamping plate 81. At this time, the space between the two clamping plates 81 is sufficient to place the lithium-ion battery pack. After the lithium-ion battery pack is placed, the pulled handle 82 is released, and the clamping plate 81 moves towards the lithium-ion battery pack under the action of the elastic element 83, so as to clamp the lithium-ion battery pack between the two clamping plates 81, limiting the movement of the lithium-ion battery pack in a position perpendicular to its feeding direction, thereby ensuring the stability of the lithium-ion battery pack during transportation.

[0039] It should be noted that the width direction of the support plate 7 is parallel to the direction in which the lithium-ion battery pack is placed, and the elastic element 83 is specifically a spring.

[0040] The handle 82 is arranged horizontally in a U-shape. At least one guide rail 10 is provided on the upper surface of the support plate 7 along its length. The clamping plate 81 has a guide groove that cooperates with the guide rail 10. The U-shaped handle 82 makes it easy for the user to pull and quickly adjust the relative position between the two clamping plates 81. The guide rail 10 is designed to guide the movement of the clamping plate 81, so that it can stably clamp both sides of the lithium-ion battery pack after movement.

[0041] The positioning mechanism 9 includes a vacuum suction cup 91, the suction end 92 of which penetrates the inner wall of the protective housing 1 and extends away from the protective housing 1. The vacuum suction cup 91 adsorbs the lithium-ion battery pack resting against it from the rear, thus limiting the forward and backward movement of the lithium-ion battery pack. Through the cooperation of the positioning mechanism 9 and the limiting mechanism 8, the positional movement of the lithium-ion battery pack in the forward, backward, left, and right directions is achieved, ensuring that the lithium-ion battery pack will not move randomly within the protective housing 1 during transportation, effectively preventing collisions and ensuring efficient transportation of the lithium-ion battery pack.

[0042] Specifically, the vacuum suction cup 91's suction end 92 can be connected to a vacuum pump or a vacuum generator, both of which can generate a vacuum to adsorb the lithium-ion battery pack.

[0043] The front-to-back direction of the lithium-ion battery pack is parallel to the direction in which the lithium-ion battery pack is loaded.

[0044] It should be noted that the number and position of the vacuum suction cups 91 are not limited, as long as they can achieve adsorption and positioning of the rear side of the lithium-ion battery pack.

[0045] The protective door 2 is equipped with a handle 6, which makes it easy for staff to open it to put in the lithium-ion battery pack, or to close the protective door 2 to make the interior of the protective door 2 a sealed space, thereby protecting the lithium-ion battery pack.

[0046] A buffer mechanism 12 is provided at the bottom of the protective box 1. The buffer mechanism 12 includes a hinge frame 121 fixed to the lower surface of the protective box 1. A first adjustment plate 122 and a second adjustment plate 123 are hinged to the hinge frame 121. The ends of the first adjustment plate 122 and the second adjustment plate 123 away from the hinge frame 121 are respectively connected to the hinge guide rod 126 through a hinge seat 124. The hinge guide rod 126 passes through the two hinge seats 124 and its two ends are fixed to the base 125. The part of the hinge guide rod 126 located between the adjustment plate and the base 125 is fitted with an elastic element 127.

[0047] When the top of the protective box 1, which forms a triangular structure with the first adjusting plate 122 and the second adjusting plate 123 and the hinged guide rod 126, moves downward under pressure, the ends of the first adjusting plate 122 and the second adjusting plate 123 connected to the hinged guide rod 126 move away from each other and compress the second elastic element 127. When the pressure on the top of the protective box 1 disappears, the second elastic element 127 extends, and its elasticity can cause the ends of the first adjusting plate 122 and the second adjusting plate 123 connected to the hinged guide rod 126 to move closer to each other, thereby pushing the protective box 1 to reset.

[0048] When encountering uneven road surfaces during transportation, it can effectively prevent the bottom of the protective box 1 from directly impacting the transport vehicle, thereby preventing damage to the protective box 1 and the lithium-ion battery pack inside, and ensuring the service life of the protective box 1.

[0049] It should be noted that the above-mentioned adjusting plate refers to adjusting plate one 122 and adjusting plate two 123, and the elastic element two 127 is a spring.

[0050] The two ends of the hinge frame 121 along its length are connected to the lower surface of the protective housing 1 via connecting seats 130. The hinge frame 121 consists of two hinge rods. A movable guide rod 128 is vertically arranged at each of the four corners of the lower surface of the protective housing 1, and one end of each movable guide rod 128 is located within the guide sleeve 129 at the four corners of the base 125. By setting the movable guide rods 128 and guide sleeves 129, the vertical movement of the protective housing is buffered and guided, avoiding collisions and damage when multiple protective housings 1 are placed side by side, and effectively improving the service life of the protective housing 1.

[0051] The protective enclosure 1 is equipped with at least one cooling fan 13 on its top, and a protective frame 15 is connected to its upper surface via support columns. The cooling fan 13 dissipates heat from the lithium-ion battery pack at high temperatures while keeping the interior of the protective enclosure 1 dry, preventing damage to the lithium-ion battery pack caused by moisture inside the enclosure and thus avoiding losses for the company. This effectively improves the storage efficiency of the lithium-ion battery pack.

[0052] The protective frame 15 is designed to prevent rainwater from entering the protective housing 1 through the cooling fan 13 even in open-air environments, thus preventing the lithium-ion battery pack from being damaged by rainwater immersion and ensuring the lifespan of the lithium-ion battery pack.

[0053] The surface of the support plate 7 is covered with a PVC flame-retardant layer. A locking mechanism 14 is provided on the openable side of the protective door 2. The locking mechanism 14 includes a locking block 141, which is L-shaped. When the protective door 2 is closed, one end of the locking block 141 is locked to the side wall of the protective housing 1 by a locking screw 142. When a fire occurs in one of the confined spaces used to house lithium-ion battery packs, the support plate 7 can initially prevent the fire from spreading, thus avoiding impact on other lithium-ion battery packs in the confined spaces and preventing greater losses.

[0054] The protective housing 1 has threaded holes on its side corresponding to the screw holes on the locking block 141. This allows the locking screw 142 to be inserted into these screw holes after the protective door 2 is closed, and the locking screw 142 can be turned to lock the locking block 141 to the protective housing 1. This locking mechanism 14 ensures that the protective door 2 remains closed even when tilted or tipped over, thus not affecting the storage of the lithium-ion battery pack inside the protective housing 1.

[0055] In some embodiments, to reduce production costs, not every surface of a lithium-ion battery is covered with a fire-retardant sticker. Parts of the battery without the fire-retardant sticker may still be at risk of catching fire due to a malfunction of the lithium-ion battery.

[0056] Therefore, an emergency fire-fighting mechanism 11 is also provided on the side of the protective enclosure 1. The emergency fire-fighting mechanism 11 includes an emergency cabinet 111 located on the side of the protective enclosure 1. The emergency cabinet 111 contains a gas cylinder 112. The gas cylinder 112 is connected to a main fire extinguishing pipe 113. Several fire extinguishing branch pipes 114 are arranged in parallel on the main fire extinguishing pipe 113. Each fire extinguishing branch pipe 114 passes through the protective enclosure 1 and extends into its interior, and one end of each branch pipe is equipped with a fire extinguishing nozzle 115. When the lithium-ion battery pack inside the protective enclosure 1 catches fire, the gas cylinder 112 is activated. The inert gas inside is dispersed through the main fire extinguishing pipe 113 to the fire extinguishing branch pipes 114 located in the designated spaces where the lithium-ion battery packs are stored on each layer, so as to extinguish the fire in time. The designated spaces where adjacent lithium-ion battery packs are placed are separated by a support plate 7. While extinguishing the fire, the support plate 7 also prevents the lithium-ion battery packs around the fault from being damaged or burned due to the spread of the fire.

[0057] Specifically, the gas cylinder 112 can contain inert gas or dry powder foam, both of which can play a role in extinguishing fires.

[0058] In some embodiments, three fire extinguishing branch pipes 114 are provided corresponding to the support plate 7. Each fire extinguishing branch pipe 114 is provided with a solenoid valve. When a fire occurs, the solenoid valve on the fire extinguishing branch pipe 114 corresponding to the lithium-ion battery pack position will open, thereby allowing inert gas to be injected into the corresponding confined space for fire extinguishing.

[0059] It also includes an openable protective door 2, on which an alarm 3 and a temperature sensor 4 are installed. At least one smoke sensor 5 is installed inside the protective enclosure 1. The alarm 3, temperature sensor 4 and smoke sensor 5 are all electrically connected to an external controller.

[0060] Each layer of the lithium-ion battery pack storage area is equipped with a temperature sensor 4. The temperature sensor 4 can detect the temperature of each layer inside the protective enclosure 1 in a timely manner. When the temperature is too high, it indicates that there is an abnormality in the storage of the lithium-ion battery packs in that layer, and there is a risk of fire. After synchronous sensing by the smoke sensor 5, the risk signal can be accurately detected and then transmitted to the external controller. The external controller can control the alarm 3 to sound an alarm, so that staff can detect the fire hazard in time.

[0061] Specifically, temperature sensor 4 is model WRC2-101, which has high accuracy; smoke sensor 5 is model JTY-GD-F343, which also has high accuracy; and alarm 3 is model YK-828, which is relatively energy-efficient.

[0062] In addition, after the fire of the lithium-ion battery pack on the corresponding floor is detected, the emergency fire-fighting mechanism 11 is activated, the gas storage cylinder 112 is opened, and the inert gas enters the fire-fighting branch pipe 114 on the corresponding fire floor through the main fire-fighting pipe 113 and is sprayed out from the fire-fighting nozzle 115 to accurately extinguish the fire of the lithium-ion battery pack, effectively control and extinguish the fire, thereby preventing the fire from spreading and causing damage and combustion of the lithium-ion battery packs around the fault, and reducing the company's losses.

[0063] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A lithium-ion battery safety protection device, characterized in that: The system includes a protective housing for lithium-ion battery packs. The protective housing comprises a casing, the interior of which is divided from top to bottom into several defined spaces for placing lithium-ion battery packs by multiple support plates. At least one side of each lithium-ion battery pack is affixed with a fire-retardant sticker. Each of the carrier plates is provided with a limiting mechanism. The inner wall of the protective box is provided with multiple positioning mechanisms corresponding to the positions of the limiting mechanisms on the side facing the lithium-ion battery pack insertion direction. The positioning mechanisms and limiting mechanisms are used to restrict the movement of the lithium-ion battery pack in a position perpendicular or parallel to its insertion direction.

2. The lithium-ion battery safety protection device according to claim 1, characterized in that: The limiting mechanism includes clamping plates and handles that are vertically arranged on both sides of the bearing plate in the width direction. One end of the handle passes through the side wall of the protective box and is fixedly connected to the clamping plate. An elastic element is sleeved on the part of the handle located between the clamping plate and the inner wall of the protective box.

3. A lithium-ion battery safety protection device according to claim 2, characterized in that: The handle is arranged horizontally in a U-shape, and at least one guide rail is provided on the upper surface of the bearing plate along its length direction. The clamping plate is provided with a guide groove that cooperates with the guide rail.

4. A lithium-ion battery safety protection device according to claim 1, characterized in that: The positioning mechanism includes a vacuum suction cup, the suction end of which penetrates the inner wall of the protective box and extends away from the protective box.

5. A lithium-ion battery safety protection device according to claim 1, characterized in that: It also includes an emergency fire-fighting organization, which includes an emergency cabinet set on the side of the protective box. The emergency cabinet contains a gas cylinder, and the gas cylinder opening is connected to a main fire extinguishing pipe. The main fire extinguishing pipe has several fire extinguishing branch pipes arranged in parallel. Each fire extinguishing branch pipe passes through the protective box and extends into its interior, and one end of each branch pipe is equipped with a fire extinguishing nozzle.

6. A lithium-ion battery safety protection device according to claim 5, characterized in that: It also includes an openable protective door, on which an alarm and a temperature sensor are installed. At least one smoke sensor is installed inside the protective enclosure. The alarm, temperature sensor, and smoke sensor are all electrically connected to an external controller.

7. A lithium-ion battery safety protection device according to claim 1, characterized in that: A buffer mechanism is provided at the bottom of the protective box. The buffer mechanism includes a hinge frame fixed to the lower surface of the protective box. Two parallel adjustment plates are hinged on the hinge frame. The ends of the adjustment plates away from the hinge frame are respectively connected to the hinge guide rods through a hinge seat. The hinge guide rods pass through the two hinge seats and are fixed at both ends to the base. The portion of the hinge guide rod between the adjustment plate and the base is fitted with an elastic element.

8. A lithium-ion battery safety protection device according to claim 7, characterized in that: The two ends of the hinge frame along its length are connected to the lower surface of the protective box via connecting seats. The hinge frame consists of two hinge rods. A movable guide rod is vertically installed at each of the four corners of the lower surface of the protective box, and one end of each movable guide rod is located inside the guide sleeve at the four corners of the base.

9. A lithium-ion battery safety protection device according to claim 1, characterized in that: The top of the protective enclosure is equipped with at least one cooling fan, and a protective frame is connected to its upper surface via support columns.

10. A lithium-ion battery safety protection device according to claim 6, characterized in that: The surface of the support plate is covered with a layer of PVC flame retardant layer. The opening side of the protective door is provided with a locking mechanism. The locking mechanism includes a locking block, which is L-shaped. When the protective door is closed, one end of the locking block is locked to the side wall of the protective box by locking screws.

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