CN216120569U

CN216120569U - 18650 safety protection structure of lithium cell

Info

Publication number: CN216120569U
Application number: CN202122642786.5U
Authority: CN
Inventors: 张建军; 夏青松; 李银; 何桂林; 王成强
Original assignee: Nanping Tongxin New Energy Technology Co ltd
Current assignee: Nanping Tongxin New Energy Technology Co ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-03-22
Anticipated expiration: 2031-11-01

Abstract

The utility model belongs to the technical field of lithium battery safety protection, in particular to a 18650 safety protection structure of a lithium battery, aiming at the problem that the lithium battery is easy to damage due to poor safety protection effect of the existing lithium battery, the utility model provides a scheme which comprises a protection box body, wherein a buffer box body is arranged in the protection box body, a primary buffer mechanism is arranged at the bottom of the buffer box body, a buffer groove is arranged on the inner wall of the bottom of the protection box body, a secondary buffer mechanism is arranged in the buffer groove, a gap is arranged at the top of the protection box body, a prompting mechanism is arranged in the gap, the primary buffer mechanism comprises a bottom plate, the bottom plate is positioned below the buffer box body, the outer side of the bottom plate is contacted with the inner wall of the protection box body, and one end of a plurality of first springs is fixedly arranged at the top of the bottom plate, simultaneously, the device has the prompting function, simple structure and convenient use.

Description

18650 safety protection structure of lithium cell

Technical Field

The utility model relates to the technical field of lithium battery safety protection, in particular to a safety protection structure of a 18650 lithium battery.

Background

The lithium ion battery has the advantages of light weight, large capacity, no memory effect and the like, so the lithium ion battery is generally applied, the 18650 lithium battery is a type of the lithium ion battery, and the lithium battery needs to be safely protected when in use, so that the damage caused by bumping is avoided.

In the prior art, the safety protection effect of a lithium battery is poor, so that the lithium battery is easy to damage, and therefore a 18650 safety protection structure of the lithium battery is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defect that a lithium battery is easy to damage due to poor safety protection effect of the lithium battery, and provides a 18650 safety protection structure of the lithium battery.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a safety protection structure of a lithium battery comprises a protection box body, wherein a buffer box body is arranged in the protection box body, a primary buffer mechanism is arranged at the bottom of the buffer box body, a buffer groove is formed in the inner wall of the bottom of the protection box body, a secondary buffer mechanism is arranged in the buffer groove, a notch is formed in the top of the protection box body, a prompt mechanism is arranged in the notch, the primary buffer mechanism comprises a bottom plate, the bottom plate is positioned below the buffer box body, the outer side of the bottom plate is in contact with the inner wall of the protection box body, one end of a plurality of first springs is fixedly mounted at the top of the bottom plate, the other end of the plurality of first springs is fixedly connected with the bottom of the buffer box body, thread grooves are formed in two sides of the bottom plate, locking bolts are mounted on two sides of the protection box body in a threaded manner and are in threaded connection with the thread grooves, the prompt mechanism comprises a whistle fixedly mounted in the notch, an L-shaped through hole is formed in the inner wall of one side of the notch, and an air blowing opening of the whistle is fixedly communicated with the L-shaped through hole.

Preferably, the second-level buffer mechanism comprises a buffer plate which is slidably mounted in the buffer groove, the buffer plate is located below the buffer box body, a through hole is formed in the bottom plate, and the through hole is penetrated through the top of the buffer plate.

Preferably, one end of a second spring is fixedly mounted at the bottom of the buffer plate, and the bottom end of the second spring is fixedly connected with the inner wall of the bottom of the buffer groove.

Preferably, the protection box body is provided with a cavity, a piston is slidably mounted in the cavity, one side of the protection box body is provided with an air inlet communicated with the cavity, a first one-way valve is arranged in the air inlet, a second one-way valve is arranged in the L-shaped through hole, and a lifting rod is fixedly mounted at the bottom of the piston.

Preferably, the one end fixed mounting of lifter has the connecting plate, and one side of connecting plate and one side fixed connection of buffer board have seted up the spout on one side inner wall of dashpot, the outside of connecting plate and the inner wall sliding connection of spout, set up the perpendicular hole that communicates with the cavity on the top inner wall of spout, the outside of lifter and the inner wall sliding connection who erects the hole.

Compared with the prior art, the utility model has the advantages that:

(1) according to the scheme, the safety protection effect of the lithium battery can be improved through the arrangement of the primary buffer mechanism and the secondary buffer mechanism, and the lithium battery is prevented from being damaged due to bumping;

(2) according to the scheme, the piston is driven by the descending rod to vertically move, when the piston moves downwards, outside air is extracted and enters the cavity from the air inlet hole, when the piston moves upwards, the air is discharged from the L-shaped through hole and blows the whistle, so that people are prompted, and the condition that the piston jolts seriously is shown;

the utility model can improve the safety protection effect of the lithium battery, avoid the damage of the lithium battery caused by bumping, and has the prompting function, simple structure and convenient use.

Drawings

Fig. 1 is a schematic structural diagram of a safety protection structure of a 18650 lithium battery according to the present invention;

fig. 2 is a schematic front sectional view of a 18650 lithium battery according to the present invention;

fig. 3 is an enlarged schematic structural diagram of a portion a in fig. 2 of a safety protection structure of a 18650 lithium battery according to the present invention.

In the figure: 1. a protective box body; 2. a buffer box body; 3. a base plate; 4. a first spring; 5. locking the bolt; 6. a buffer tank; 7. a buffer plate; 8. a second spring; 9. a connecting plate; 10. a lifting rod; 11. a cavity; 12. a chute; 13. a piston; 14. an air inlet; 15. an L-shaped through hole; 16. a first check valve; 17. a second one-way valve; 18. a notch; 19. a whistle.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments, but not all embodiments.

Referring to fig. 1-3, a 18650 safety protection structure of lithium cell, including protection box 1, be equipped with buffer box 2 in protection box 1, buffer box 2's bottom is equipped with one-level buffer gear, buffer slot 6 has been seted up on protection box 1's the bottom inner wall, be equipped with second grade buffer gear in the buffer slot 6, breach 18 has been seted up at protection box 1's top, be equipped with suggestion mechanism in the breach 18, one-level buffer gear includes bottom plate 3, bottom plate 3 is located buffer box 2's below, and the outside of bottom plate 3 contacts with protection box 1's inner wall, bottom plate 3's top fixed mounting has the one end of a plurality of first springs 4, the other end of a plurality of first springs 4 all with buffer box 2's bottom fixed connection.

According to the utility model, the secondary buffer mechanism comprises a buffer plate 7 which is slidably mounted in a buffer groove 6, the buffer plate 7 is positioned below the buffer box body 2, a through hole is formed in the bottom plate 3, the top of the buffer plate 7 penetrates through the through hole, and the buffer plate 7 can vertically slide in the buffer groove 6.

In the utility model, one end of the second spring 8 is fixedly arranged at the bottom of the buffer plate 7, the bottom end of the second spring 8 is fixedly connected with the inner wall of the bottom of the buffer groove 6, and the second spring 8 is extruded by the buffer plate 7, so that secondary buffering can be carried out.

In the utility model, the prompting mechanism comprises the whistle 19 fixedly arranged in the notch 18, the inner wall of one side of the notch 18 is provided with the L-shaped through hole 15, the air blowing port of the whistle 19 is fixedly communicated with the L-shaped through hole 15, and the whistle 19 can be blown by air discharged from the L-shaped through hole 15.

According to the utility model, a cavity 11 is formed in a protection box body 1, a piston 13 is slidably mounted in the cavity 11, an air inlet 14 communicated with the cavity 11 is formed in one side of the protection box body 1, a first one-way valve 16 is arranged in the air inlet 14, a second one-way valve 17 is arranged in an L-shaped through hole 15, a lifting rod 10 is fixedly mounted at the bottom of the piston 13, and the first one-way valve 16 and the second one-way valve 17 are arranged to enable air to flow only in one direction.

According to the utility model, one end of a lifting rod 10 is fixedly provided with a connecting plate 9, one side of the connecting plate 9 is fixedly connected with one side of a buffer plate 7, the inner wall of one side of a buffer groove 6 is provided with a sliding groove 12, the outer side of the connecting plate 9 is in sliding connection with the inner wall of the sliding groove 12, the inner wall of the top of the sliding groove 12 is provided with a vertical hole communicated with a cavity 11, the outer side of the lifting rod 10 is in sliding connection with the inner wall of the vertical hole, and the lifting rod 10 can be driven to move through the connecting plate 9.

According to the utility model, threaded grooves are formed in both sides of the bottom plate 3, locking bolts 5 are installed on both sides of the protection box body 1 in a threaded mode, the locking bolts 5 are in threaded connection with the threaded grooves, the locking bolts 5 are screwed off, the fixing of the bottom plate 3 is released, and at the moment, the buffer box body 2 can be poured out of the protection box body 1.

In this embodiment, install 18650 lithium cell in buffer box 2, when receiving jolting, can play the effect of buffering through a plurality of first springs 4, when jolting is comparatively serious, buffer box 2 can extrude buffer board 7, make second spring 8 deformation, carry out the second grade buffering, when not jolting, second spring 8 makes buffer board 7 upwards reset, drive connecting plate 9 through buffer board 7 and remove, connecting plate 9 drives lifter 10 vertical migration, lifter 10 drives piston 13 vertical migration, when piston 13 moves down, extract external gas, external gas gets into cavity 11 from inlet port 14, when piston 13 rebound, gas is discharged from L shape through-hole 15, gas blows whistle 19, indicate people, it is comparatively serious to explain jolt.

The above descriptions are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solutions and the utility model concepts of the present invention are equivalent to, replaced or changed.

Claims

1. A 18650 lithium cell safety protection structure, which comprises a protection box body (1), it is characterized in that a buffer box body (2) is arranged in the protective box body (1), a primary buffer mechanism is arranged at the bottom of the buffer box body (2), a buffer groove (6) is arranged on the inner wall of the bottom of the protective box body (1), a secondary buffer mechanism is arranged in the buffer groove (6), a notch (18) is arranged at the top of the protective box body (1), a prompting mechanism is arranged in the notch (18), the first-stage buffer mechanism comprises a bottom plate (3), the bottom plate (3) is positioned below the buffer box body (2), and the outside of bottom plate (3) contacts with the inner wall of protection box (1), the top fixed mounting of bottom plate (3) has the one end of a plurality of first springs (4), and the other end of a plurality of first springs (4) all with the bottom fixed connection of buffer box (2).

2. The 18650 lithium battery safety protection structure of claim 1, wherein, the secondary buffer mechanism includes a buffer board (7) slidably mounted in the buffer slot (6), the buffer board (7) is located below the buffer box (2), a through hole is opened on the bottom plate (3), and the top of the buffer board (7) penetrates through the through hole.

3. The safety protection structure of 18650 lithium batteries of claim 2, wherein, the bottom of the buffer board (7) is fixedly installed with one end of the second spring (8), and the bottom end of the second spring (8) is fixedly connected with the bottom inner wall of the buffer slot (6).

4. The 18650 lithium battery safety protection structure of claim 1, wherein the prompting mechanism includes a whistle (19) fixedly mounted in the gap (18), an L-shaped through hole (15) is formed in the inner wall of one side of the gap (18), and an air blowing port of the whistle (19) is fixedly communicated with the L-shaped through hole (15).

5. The 18650 lithium battery safety protection structure as claimed in claim 1, wherein, a cavity (11) is provided on the protection case (1), a piston (13) is slidably mounted in the cavity (11), an air inlet (14) communicated with the cavity (11) is provided on one side of the protection case (1), a first check valve (16) is provided in the air inlet (14), a second check valve (17) is provided in the L-shaped through hole (15), and a lifting rod (10) is fixedly mounted at the bottom of the piston (13).

6. The 18650 lithium battery safety protection structure of claim 5, wherein a connecting plate (9) is fixedly mounted at one end of the lifting rod (10), one side of the connecting plate (9) is fixedly connected with one side of the buffer plate (7), a sliding groove (12) is formed in the inner wall of one side of the buffer groove (6), the outer side of the connecting plate (9) is slidably connected with the inner wall of the sliding groove (12), a vertical hole communicated with the cavity (11) is formed in the inner wall of the top of the sliding groove (12), and the outer side of the lifting rod (10) is slidably connected with the inner wall of the vertical hole.

7. The safety protection structure of 18650 lithium batteries of claim 1, characterized in that, thread groove has all been seted up to the both sides of bottom plate (3), and the both sides of protection box (1) are threaded installation locking bolt (5), and locking bolt (5) and thread groove threaded connection.