Lithium battery assembly protection structure

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a lithium battery assembly protection structure. Comprising a protection box, a protection assembly is arranged on the upper side of the protection box, the protection assembly comprises a box cover fixedly arranged on the upper side of the protection box, a partition plate is fixedly connected to the position, close to the middle, in the box cover, a plurality of dry powder cavities are formed in the bottom of the partition plate, a film is arranged on the lower surface of the partition plate, and the dry powder cavities are blocked by the film. Clamping plates are arranged on the lower surfaces of the films. According to the utility model, when the temperature of the lithium battery in the protection box is increased abnormally due to a fault, a wax block in the box cover is melted at a high temperature, the spring pushes the plugging plate to move transversely, and the plugging plate moving transversely drives the plurality of puncture tubes to puncture the film through the lifting mechanism, so that dry powder in the plurality of dry powder cavities is released, and the dry powder covers the lithium battery; and larger economic loss and potential safety hazards caused by fire breakout of the lithium battery due to continuous temperature rise are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery production technical field, concretely relates to a lithium battery assembly protection structure. BACKGROUND

[0002] Lithium battery is a kind of battery by lithium metal or lithium alloy as negative electrode material, using non-aqueous electrolyte solution, due to the chemical properties of lithium metal is very active, make the processing, preservation, use of lithium metal, the requirement to environment is very high, with the development of science and technology, now lithium battery has become mainstream.

[0003] Lithium battery is usually composed of lithium battery shell and several electric cores installed in the shell, when lithium battery is transported in production workshop, lithium battery core is prone to short-circuit failure due to physical damage or excessive impact and other reasons, at this time, the internal resistance of the core decreases, the current increases sharply, thereby generating a large amount of heat, and because the workshop environment is relatively dry, when the temperature of lithium battery core exceeds 60 degrees, there is a risk of fire, once the lithium battery core catches fire, the fire will spread to the lithium battery shell and the nearby equipment, causing greater economic loss and safety hazard, therefore, it is necessary to protect the lithium battery from fire when the lithium battery abnormally heats up. SUMMARY

[0004] The utility model discloses a lithium battery assembly protection structure to solve the problem in the above background art.

[0005] To achieve the above object, one of the purposes of the utility model is to provide a lithium battery assembly protection structure, including the protection box, the upper side of the protection box is provided with protection assembly, the protection assembly includes the box cover fixedly arranged on the upper side of the protection box, the box cover is fixedly connected with the baffle in the inside near the middle position, the bottom of the baffle is provided with a plurality of dry powder cavities, the lower surface of the baffle is provided with a film, the film blocks the dry powder cavity, the lower surface of the film is provided with a clamping plate, the film and the clamping plate are fixedly connected on the lower side of the baffle, a plurality of through holes are formed in the clamping plate, a plurality of through holes and a plurality of dry powder cavities are one-to-one corresponding, the lower side of the clamping plate is provided with a mesh frame, a plurality of puncture pipes are fixedly connected on the mesh frame, a plurality of puncture pipes are respectively arranged below a plurality of through holes, the baffle upper side and the top surface between the inside of the box cover are slidably provided with a blocking plate, a plurality of wax blocks are arranged between the blocking plate side and the inner wall of the box cover, the wax blocks are placed on the upper surface of the baffle, and the upper surface of the blocking plate is symmetrically fixedly connected with two positioning plates, the positioning plate side and the inner wall of the box cover are fixedly connected with a spring, the spring pushes the positioning plate towards the wax block, the opposite sides of the blocking plate are symmetrically provided with two lifting mechanisms, when the blocking plate moves towards the wax block, the lifting mechanism drives the mesh frame to move vertically upwards.

[0006] As a further improvement of the technical solution, the lifting mechanism comprises a transmission rod rotatably arranged between the partition plate and the inner wall of the box cover, an eccentric disc is fixedly connected to the transmission rod, a sleeve frame is sleeved on the eccentric disc, a moving plate is fixedly connected to the lower surface of the sleeve frame, a guide sleeve is sleeved on the moving plate, the guide sleeve is fixedly arranged on the inner wall of the box cover, and the lower end of the moving plate is fixedly arranged on the upper surface of the mesh frame.

[0007] As a further improvement of the technical solution, the lifting mechanism further comprises a gear coaxially and fixedly connected to the transmission rod, and a rack is fixedly connected to the upper surface of the blocking plate, the rack being engaged with the gear.

[0008] As a further improvement of the technical solution, the top of the dry powder cavity is provided with a pressure relief hole penetrating through the top of the partition plate, the blocking plate blocks the pressure relief hole, and a plurality of communication grooves are formed in the blocking plate, the plurality of communication grooves being communicated with the plurality of pressure relief holes when the blocking plate moves towards the direction of the wax block.

[0009] As a further improvement of the technical solution, the top of the box cover is provided with a top groove, and the top groove is arranged on the upper side of the wax block.

[0010] Compared with the prior art, the present application has the following advantages:

[0011] The lithium battery assembly protection structure can prevent the lithium battery from catching fire due to continuous heating, thereby avoiding greater economic loss and safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is an overall structure schematic view of the present application;

[0013] Figure 2 It is an exploded view of the overall structure of the present application;

[0014] Figure 3 It is a structure schematic view of the protection assembly of the present application;

[0015] Figure 4 It is an exploded view of the protection assembly of the present application;

[0016] Figure 5 It is a cross-sectional view of the protection assembly of the present application;

[0017] Figure 6 It is a cross-sectional view of the protection assembly of the present application;

[0018] Figure 7 Figure 3 is a cross-sectional view of the protective assembly of the utility model;

[0019] Figure 8 Figure 4 is a cross-sectional view of the protective assembly of the utility model;

[0020] Figure 9 Figure 5 is a structural schematic view of the lifting mechanism of the utility model.

[0021] The meanings of the respective reference numerals in the drawings are as follows:

[0022] 1, protective box;

[0023] 2, box cover; 21, top groove;

[0024] 3, partition; 31, dry powder cavity; 32, pressure relief hole;

[0025] 4, film;

[0026] 5, clamping plate; 51, through hole;

[0027] 6, net frame; 61, puncture tube;

[0028] 7, plugging plate; 71, positioning plate; 72, spring; 73, communication groove;

[0029] 8, lifting mechanism; 81, moving plate; 82, sleeve frame; 83, eccentric disc; 84, transmission rod; 85, rack; 86, gear; 87, guide sleeve;

[0030] 9, wax block. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0032] Embodiment 1

[0033] Please refer to Figures 1-9 The utility model discloses a lithium battery assembly protection structure, including protective box 1, the inside of protective box 1 is used for installing lithium battery, the upper side of protective box 1 is provided with protective assembly, the protective assembly includes the box cover 2 of fixed setting in the upper side of protective box 1, the box cover 2 and protective box 1 are overall protected to the lithium battery in the inside of protective box 1 in cooperation, avoid the damage of lithium battery because of the collision of hard object.

[0034] Meanwhile, the box cover 2 is fixedly connected with a partition plate 3 near the middle position inside, a plurality of dry powder cavities 31 are formed in the bottom of the partition plate 3, the dry powder cavities 31 contain dry powder for extinguishing fire, a film 4 is arranged on the lower surface of the partition plate 3, the film 4 is a rubber sheet with elasticity, and is a elastic tab formed by pulling the rubber sheet, like a balloon, the film 4 is tightly sealed on the dry powder cavities 31, so as to avoid the dry powder from falling out of the dry powder cavities 31, a clamping plate 5 is arranged on the lower surface of the film 4, the film 4 and the clamping plate 5 are fixedly connected on the lower side of the partition plate 3 by screws, the clamping plate 5 and the partition plate 3 cooperate to clamp and fix the film 4, the fixed film 4 is in a stretched and tight state, a plurality of through holes 51 are formed in the clamping plate 5, the plurality of through holes 51 and the plurality of dry powder cavities 31 are one-to-one corresponding, a mesh frame 6 is arranged on the lower side of the clamping plate 5, a plurality of puncture pipes 61 are fixedly connected on the mesh frame 6, the plurality of puncture pipes 61 are respectively arranged below the plurality of through holes 51, a sealing plate 7 is slidably arranged between the upper side of the partition plate 3 and the top surface inside the box cover 2, a plurality of wax blocks 9 are arranged between one side of the sealing plate 7 and the inner wall of the box cover 2, the wax blocks 9 are made of paraffin with a melting point of 47-64 degrees Celsius, the wax blocks 9 are placed on the upper surface of the partition plate 3, a top groove 21 is formed in the top of the box cover 2, the top groove 21 is arranged above the wax blocks 9, workers can observe the state of the wax blocks 9 through the top groove 21, and replace the damaged wax blocks 9 in time through the top groove 21, two positioning plates 71 are fixedly connected on the upper surface of the sealing plate 7 in a symmetrical manner, springs 72 are fixedly connected between one side of the positioning plates 71 and the inner wall of the box cover 2, the springs 72 push the positioning plates 71 towards the wax blocks 9, two lifting mechanisms 8 are arranged on the opposite sides of the sealing plate 7 in a symmetrical manner, when the lithium battery in the protection box 1 is heated due to failure, the heat emitted by the lithium battery heats the air in the protection box 1 and the box cover 2, when the temperature of the air is higher than the melting point of the wax blocks 9, the lithium battery is in a state of about to catch fire, at this time, the wax blocks 9 will be heated from solid to liquid, so that the wax blocks 9 can no longer block the movement of the sealing plate 7, at this time, the springs 72 will push the sealing plate 7 towards the wax blocks 9, so that the sealing plate 7 drives the mesh frame 6 to move vertically upwards through the lifting mechanism 8, the mesh frame 6 drives the plurality of puncture pipes 61 to move upwards synchronously, the upper ends of the puncture pipes 61 pierce the film 4 through the corresponding through holes 51, until the upper ends of the puncture pipes 61 enter the corresponding dry powder cavities 31, after the upper ends of the puncture pipes 61 pierce the film 4, the dry powder in the dry powder cavities 31 will flow downwards through the channels of the puncture pipes 61 and the gaps between the puncture pipes 61 and the dry powder cavities 31, at the same time, after the film 4 in the stretched state is poked by the puncture pipes 61, the film 4 will automatically shrink to enlarge the leakage, the dry powder in the dry powder cavities 31 will also flow downwards through the leakage, so as to accelerate the release speed of the dry powder in the dry powder cavities 31, the flowing dry powder will cover on the lithium battery, the dry powder isolates the oxygen in the air, so as to avoid the lithium battery from catching fire due to high temperature, and to avoid greater economic loss and safety hazard.

[0035] The structure of the lifting mechanism 8 is as follows, referring to Figure 6 、 Figure 7 and Figure 9 , the lifting mechanism 8 includes a transmission rod 84 rotatably arranged between the partition plate 3 and the inner wall of the box cover 2, the transmission rod 84 is fixedly connected with an eccentric disc 83, the eccentric disc 83 is sleeved with a sleeve frame 82, the lower surface of the sleeve frame 82 is fixedly connected with a vertically arranged moving plate 81, the moving plate 81 is sleeved with a guide sleeve 87, the guide sleeve 87 is fixedly arranged on the inner wall of the box cover 2, the guide sleeve 87 limits the moving plate 81 to move only along the axis direction of the moving plate 81, the lower end of the moving plate 81 is fixedly arranged on the upper surface of the mesh frame 6, the lifting mechanism 8 further includes a gear 86 coaxially fixedly connected with the transmission rod 84, the upper surface of the blocking plate 7 is fixedly connected with a rack 85, the rack 85 is engaged with the gear 86, when the spring 72 pushes the blocking plate 7 to move, the blocking plate 7 drives the rack 85 to move transversely, through the engagement transmission of the rack 85 and the gear 86, the rack 85 drives the gear 86, the transmission rod 84 and the eccentric disc 83 to rotate, the rotating eccentric disc 83 continuously pushes the sleeve frame 82 to move, the sleeve frame 82 drives the moving plate 81 to move upward, the two moving plates 81 moving upward drive the mesh frame 6 and the plurality of puncture tubes 61 to move upward synchronously, the puncture tubes 61 pierce the film 4, achieving the purpose of automatically releasing dry powder when the lithium battery abnormally heats, avoiding greater economic loss caused by the fire of the lithium battery.

[0036] At the same time, the dry powder cavity 31 is provided with a pressure relief hole 32 penetrating through the top of the partition plate 3, when the wax block 9 is not melted, the blocking plate 7 blocks the pressure relief hole 32, avoiding the dry powder in the dry powder cavity 31 from leaking out through the pressure relief hole 32, because the device is used in a workshop for producing batteries, the dryness of the workshop is good, at the same time, the dry powder cavity 31 is blocked by the blocking plate 7 and the film 4, avoiding the dry powder from being eroded and dampened by the moisture in the outside world, a plurality of communication grooves 73 are arranged on the blocking plate 7, when the blocking plate 7 moves towards the wax block 9, the plurality of communication grooves 73 are respectively communicated with the plurality of pressure relief holes 32, so that the air in the dry powder cavity 31 is communicated with the air in the box cover 2, when the puncture tube 61 pierces into the inside of the dry powder cavity 31, the pressure relief hole 32 is communicated with the outside, at this time, the upper end and the lower end of the dry powder cavity 31 are both communicated with the outside, the dry powder in the dry powder cavity 31 is easily discharged from the dry powder cavity 31, achieving the purpose of blocking the fire of the lithium battery.

[0037] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A lithium battery assembly protection structure comprising a protection box (1), characterized in that: The upper side of the protection box (1) is provided with a protection assembly, the protection assembly comprises a box cover (2) fixedly arranged on the upper side of the protection box (1), a partition plate (3) is fixedly connected to the inside of the box cover (2) and close to the middle position, a plurality of dry powder cavities (31) are formed in the bottom of the partition plate (3), a film (4) is arranged on the lower surface of the partition plate (3), the film (4) seals the dry powder cavities (31), a clamping plate (5) is arranged on the lower surface of the film (4), the film (4) and the clamping plate (5) are fixedly connected to the lower side of the partition plate (3) through screws, a plurality of through holes (51) are formed in the clamping plate (5), the plurality of through holes (51) and the plurality of dry powder cavities (31) are one-to-one corresponding, a mesh frame (6) is arranged on the lower side of the clamping plate (5), a plurality of puncture pipes (61) are fixedly connected to the mesh frame (6), the plurality of puncture pipes (61) are arranged below the plurality of through holes (51) respectively, a sealing plate (7) is slidably arranged between the upper side of the partition plate (3) and the top surface in the inside of the box cover (2), a plurality of wax blocks (9) are arranged between one side of the sealing plate (7) and the inner wall of the box cover (2), the wax blocks (9) are arranged on the upper surface of the partition plate (3), two positioning plates (71) are fixedly and symmetrically connected to the upper surface of the sealing plate (7), springs (72) are fixedly connected between one side of the positioning plates (71) and the inner wall of the box cover (2), the springs (72) push the positioning plates (71) towards the wax blocks (9), two lifting mechanisms (8) are symmetrically arranged on the opposite sides of the sealing plate (7), when the sealing plate (7) moves towards the wax blocks (9), the lifting mechanisms (8) drive the mesh frame (6) to move vertically upwards.

2. The lithium battery assembly guard structure of claim 1, wherein: The lifting mechanism (8) comprises a transmission rod (84) rotatably arranged between one side of the partition plate (3) and the inner wall of the box cover (2), an eccentric disc (83) is fixedly connected to the transmission rod (84), a sleeve frame (82) is sleeved on the eccentric disc (83), a moving plate (81) is fixedly connected to the lower surface of the sleeve frame (82), a guide sleeve (87) is sleeved on the moving plate (81), the guide sleeve (87) is fixedly arranged on the inner wall of the box cover (2), and the lower end of the moving plate (81) is fixedly arranged on the upper surface of the mesh frame (6).

3. The lithium battery assembly guard structure of claim 2, wherein: The lifting mechanism (8) further comprises a gear (86) coaxially and fixedly connected to the transmission rod (84), and a rack (85) is fixedly connected to the upper surface of the sealing plate (7), the rack (85) is engaged with the gear (86).

4. The lithium battery assembly guard structure of claim 1, wherein: The top of the dry powder cavity (31) is provided with a pressure relief hole (32) penetrating through the top of the partition plate (3), the sealing plate (7) seals the pressure relief hole (32), a plurality of communication grooves (73) are formed in the sealing plate (7), when the sealing plate (7) moves towards the wax blocks (9), the plurality of communication grooves (73) are communicated with the plurality of pressure relief holes (32) respectively.

5. The lithium battery assembly guard structure of claim 1, wherein: The top of the box cover (2) is provided with a top groove (21), and the top groove (21) is arranged above the wax blocks (9).

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